[Technical Field]
[0001] The present disclosure relates to a refrigerator having a deep freezer portion, and
the present disclosure relates to a refrigerator having structural improvement for
stable coupling between a basket disposed inside deep freezer portion and a deep freezer
portion door.
[Background Art]
[0002] In general, a refrigerator is a home appliance to store food at a low temperature
and includes a refrigerating space to store food in a refrigerated state at about
3°C and a freezer space to store food in a frozen state at about -20°C.
[0003] However, when food such as meat or seafood is stored in the freezer space in the
frozen state, moisture in cells of the meat or the seafood is discharged out of the
cells while the food is frozen at -20°C. In this case, a cell destruction phenomenon
occurs, and during defrosting, a texture change phenomenon occurs.
[0004] The temperature condition of the storage space is adjusted to be in a cryogenic state
in which a temperature is significantly lower than a current temperature of the freezer
space. So, when a state of the food is changed to a frozen state, the food passes
through a freezing point temperature range, thereby minimizing the cell destruction.
Therefore, there is an advantage in that the quality of meat and the texture of food
may be returned to a state closer to a state before freezing even after defrosting.
The cryogenic temperature may be understood as referring to a temperature in the range
of -40 to -50°C.
[0005] For this reason, in recent years, the demand for a refrigerator defining a deep freezer
portion maintaining a temperature lower than that of the freezer space is increasing.
[0006] As there is a limitation to cooling using existing refrigerant, there has been an
attempt to lower the temperature of the deep freezer portion to a cryogenic temperature
using a thermoelectric module (TEM) to satisfy the demand for the deep freezer portion.
A related art patent document (
KR 10-2013-0049496) discloses a refrigerator capable of maintaining a low storage temperature using
the TEM.
[0007] The above patent document only discloses the concept of maintaining a temperature
of a deep freezer portion at a cryogenic temperature using the TEM and a structure
for inflow of cold air generated from a thermoelectric element module, but does not
disclose a structure to grip a basket disposed inside the deep freezer portion.
[0008] Various types of doors may be selected to open and close the deep freezer portion.
For example, the door uses a hinge-type door to rotate or a sliding-type door for
drawing out.
[0009] When the deep freezer portion is opened and closed by pulling out the sliding-type
door based on the sliding, the deep freezer portion door may be slidably provided
on housing of the deep freezer portion to open and close the deep freezer portion,
and the housing has to include a rail to slidably move the deep freezer portion door.
[0010] In this case, when the door is pulled out, the basket disposed inside the deep freezer
portion may be drawn out together. The basket is supported on the rail and is drawn
out, or an additional injection molding component is connected to the door and the
basket is supported on the injection molding component. When the basket is supported
on the rail and is drawn out, the rail may be a factor to reduce the storage space
inside the deep freezer portion. Alternatively, when the basket is supported on the
additional injection molding component, the injection molding component has to be
additionally connected to the door. In this case, durability thereof may be degraded
and a size of the basket may be restricted according to a shape or a size of the injection
molding component, and the inner storage space of the deep freezer portion may be
reduced similar to the case when the basket is supported on the rail.
[0011] Accordingly, there is a need for an improved structure in which the basket inside
the deep freezer portion is drawn out together with the door.
[Related Art Document]
[Patent Document]
[Disclosure]
[Technical Problem]
[0013] Accordingly, one of various objects of the present disclosure is to provide a refrigerator
in which a basket is not supported on an additional injection molding portion and
may be drawn out together with withdrawal of a door when the door is opened and closed.
[0014] One of the various objects of the present disclosure is to provide a refrigerator
in which a rail is disposed outside of a deep freezer portion to efficiently use an
inner storage space of the deep freezer portion.
[0015] One of the various objects of the present disclosure is to provide a refrigerator
including a basket that may be stably gripped by the door without depending on the
rail of the deep freezer portion.
[0016] One of the various objects of the present disclosure is to provide a refrigerator
including a basket stably coupled to the deep freezer portion door and easily detachably
coupled to the deep freezer portion door.
[Technical Solution]
[0017] To address the various problems of the present disclosure, an exemplary embodiment
of the present disclosure describes a hook structure of a drawer for direct assembly
between a door of a deep freezer portion and the drawer and a supporting structure
to support the drawer on an inner surface of the door.
[0018] An exemplary embodiment of the present disclosure describes a structure of a basket
that may be coupled to the inner surface of the door regardless of an additional injection
molding component or a structure of a guide rail. That is, an exemplary embodiment
describes a structure in which the injection molding component additionally assembled
to the door of a freezer space with a cryogenic temperature is integrated with the
drawer.
[0019] An exemplary embodiment of the present disclosure describes a structure in which
the drawer may be supported without scratching an inside of a case by the drawer when
the drawer is drawn out and inserted into the cryogenic freezer space.
[0020] According to an exemplary embodiment of the present disclosure, a refrigerator includes
a freezer space defining a storage space; and a deep freezer portion disposed in the
freezer space and defining a deep-freeze space that is partitioned from the storage
space thereof and to maintain a lower temperature than a temperature of the storage
space; the deep freezer portion includes: housing having an opening at a front surface
thereof and defining the deep-freeze space; a door configured to open and close the
front surface of the housing; and a basket accommodated in the housing and inserted
into and drawn out from the housing as the front surface of the housing is opened
and closed, the basket includes: a fixing member disposed at one side of the basket
to couple the basket to an inner surface of the door; and a first support member that
protrudes from the basket and contacting the inner surface of the door; and the fixing
member and the first support member are each disposed on a surface facing the door.
[0021] Preferably, the door defines a groove on the inner surface thereof, the fixing member
may be inserted into the groove, and the fixing member and the first support member
are disposed on a surface of the basket and are spaced apart from each other by a
predetermined distance.
[0022] Alternatively, the basket may further include a second support member that protrudes
from one side of the basket and contacts an inner bottom surface of the housing and
the basket includes a first surface facing the door; and a second surface opposite
to the first surface; and a grill may be disposed on the second surface to introduce
cold air.
[0023] In addition, the second support member may be disposed under the second surface and
the first support member and the second support member may be disposed in the basket
at a same height.
[0024] According to an exemplary embodiment of the present disclosure, a refrigerator includes
a freezer space defining a storage space; and a deep freezer portion disposed in the
freezer space and defining a deep-freeze space that is partitioned from the storage
space thereof and to maintain a lower temperature than a temperature of the storage
space; the deep freezer portion includes housing having an opening at a front surface
thereof and defining the deep-freeze space; a door configured to open and close the
front surface of the housing; a guide rail that extends from one side of the housing
in a longitudinal direction of the housing; a guide member having one side connected
to the door and movably provided along the guide rail, and a basket accommodated in
the housing and inserted into and drawn out from the housing as the front surface
of the housing is opened and closed, and the basket is coupled to the inner surface
of the door at a height spaced apart from the guide member by a predetermined distance.
[0025] Preferably, the basket may include a fixing member disposed at one side of the basket
to couple the basket to an inner surface of the door; and a first support member that
protrudes from the basket and contacting the inner surface of the door; and the door
defines a groove on the inner surface thereof and the fixing member may be inserted
into the groove. The fixing member is inserted into the groove defined on the inner
surface of the door to detachably couple the basket to the door.
[0026] In addition, the fixing member and the first support member are disposed on a surface
of the basket and are spaced apart from each other by a predetermined distance. The
fixing member and the first support member protrude from one surface of the basket,
the fixing member may be disposed on the one surface of the basket, and the first
support member may be disposed under the one surface of the basket.
[0027] In addition, the basket may further include a second support member that protrudes
from one side of the basket and contacts an inner bottom surface of the housing. The
basket includes a first surface facing the door; and a second surface opposite to
the first surface; and a grill may be disposed on the second surface to introduce
cold air.
[0028] In addition, the second support member is disposed under the second surface and the
first support member and the second support member may be disposed in the basket at
a same height.
[0029] In addition, a contact member may be disposed in the second support member and may
directly contact the inner bottom surface of the housing.
[0030] In addition, the guide member may be connected to a lower side of the door. In addition,
when the door closes the front surface of the housing, the guide member may protrude
from a rear end of the guide rail.
[0031] In addition, the guide rail may extend longer than a length of the deep-freeze space
and the length of the deep-freeze space is a length from the front surface of the
housing to a rear surface of the housing. In addition, the guide rail may be recessed
from an outer lower surface of the housing along the longitudinal direction of the
housing.
[0032] Features of the above-described embodiments may be combined with other embodiments
unless the features are not contradictory or exclusive to other embodiments.
[Advantageous Effects]
[0033] According to an embodiment of the present disclosure, a basket is not supported by
an additional injection molding component and may be drawn out to outside together
when a deep freezer portion door is opened and closed.
[0034] In addition, the basket may be coupled to the deep freezer portion door and may be
firmly supported on the inner wall of the door.
[0035] In addition, even if a rail is disposed at an outside of housing, the basket may
be coupled to a deep freezer portion door of this embodiment to close an inner portion
of the deep freezer portion.
[0036] In addition, the basket is prevented from contact to a bottom surface of housing,
thereby preventing an external force from being transmitted to food stored in the
basket.
[Description of Drawings]
[0037]
FIG. 1 shows open doors of a refrigerator according to an embodiment of the present
disclosure.
FIG. 2 shows a deep freezer portion in FIG. 1.
FIG. 3 shows a thermoelectric element module according to an embodiment of the present
disclosure.
FIG. 4 shows a refrigeration cycle used in a refrigerator according to an embodiment
of the present disclosure.
FIG. 5 shows a deep freezer portion separated from a freezer space according to an
embodiment of the present disclosure.
(a) of FIG. 6 is an enlarged view of a guide rail disposed on an inner wall of a freezer
space. (b) of FIG. 6 is a rear view of the deep freezer portion in FIG. 5.
(a) and (b) of FIG. 7 show a deep freezer portion coupled to a freezer space.
FIGS. 8 and 9 are perspective views of the deep freezer portion in FIG. 5.
FIGS. 10 and 11 show a deep freezer portion door and a basket.
FIG. 12 is a rear perspective view of a deep freezer portion.
FIG. 13 is a side cross-sectional view of the deep freezer portion in FIG. 12.
(a) and (b) of FIG. 14 show a state in which a deep freezer portion door is inserted.
FIG. 15 shows a structure to limit a withdrawal distance of a deep freezer portion
door and a structure to prevent removal thereof.
FIG. 16 is a cross-sectional view of a flow of cold air inside a deep freezer portion.
(a) of FIG. 17 is a side cross-sectional view of a deep freezer portion and (b) of
FIG. 17 is an inner top view of a deep freezer portion.
(a) of FIG. 18 is a side cross-sectional view of a freezer space and (b) of FIG. 18
is a side cross-sectional view of a grill fan assembly.
FIG. 19 is a cross-sectional view of airflow inside a deep freezer portion.
[Best Mode]
[0038] Hereinafter, specific embodiments of the present disclosure are described with reference
to drawings. The following detailed description is provided to help a comprehensive
understanding of a method, an apparatus, and/or a system described herein. However,
this is merely an example and the present disclosure is not limited thereto.
[0039] Description of well-known technology relating to the present disclosure may be omitted
if it unnecessarily obscures the gist of the present disclosure. In addition, terms
described below are defined in consideration of functions in the embodiments of the
present disclosure, which may vary according to intentions or customs of users and
operators. Therefore, the definition should be made based on the contents throughout
the specification. The terminology used in the detailed description is for the purpose
of describing embodiments of the present disclosure only and is not intended to limit
the disclosure. Singular expressions used in the present disclosure include plural
expressions unless the context clearly indicates otherwise. In the present disclosure,
terms such as "including" or "comprising" specify features, integers, steps, operations,
elements, and a portion or a combination thereof, but do not preclude a presence or
a possibility of one or more other features, integers, steps, operations, elements,
and a portion or a combination thereof in addition to what has been described above.
[0040] In addition, terms such as first, second, A, B, (a), (b) and the like may be used
herein when describing elements of the present disclosure. These terms are intended
to distinguish one element from other elements, and the essence, order, or sequence
of corresponding elements is not limited by these terms.
[0041] FIG. 1 shows open doors of a refrigerator according to an embodiment of the present
disclosure. FIG. 2 shows a deep freezer portion in FIG. 1. FIG. 3 shows a thermoelectric
element module according to an embodiment of the present disclosure. FIG. 4 shows
a refrigeration cycle used in a refrigerator according to an embodiment of the present
disclosure.
[0042] Referring to FIGS. 1 to 4, according to an embodiment of the present disclosure,
a refrigerator 1 includes a refrigerator body 2 having a rectangular shape and a refrigerator
door to open and close each space of the refrigerator 1 from the front of the body
2. According to the present disclosure, the refrigerator 1 has a bottom freezer structure
in which a refrigerating space 20 is defined at an upper portion thereof and a freezer
space 10 is defined at a lower portion thereof. The refrigerating space 20 and the
freezer space 10 each have a side-by-side type door that is opened based on rotation
about a hinge 8 disposed at both ends thereof.
[0043] However, the present disclosure is not limited to the refrigerator having the bottom-freezer
structure. If the refrigerator has a deep freezer portion in the freezer space, a
side-by-side type refrigerator in which the refrigerating space and a freezer space
are arranged horizontally and a top mount-type refrigerator in which a freezer space
is defined on the refrigerating space may be used as examples of the refrigerator.
[0044] The refrigerator body 2 includes an outer case 3 defining an outer appearance and
an inner case 4 that is spaced apart from the outer case 3 by a predetermined space
and defining an inner appearance of the refrigerating space 20 and the freezer space
10. The space between the outer case 3 and the inner case 4 is filled with insulating
material by foaming to insulate the refrigerating space 20 and the freezer space 10
from an indoor space.
[0045] The refrigerating space 20 and the freezer space 10 accommodate a shelf 7 and a drawer
11 in storage spaces thereof to store food by increasing space utilization efficiency.
The shelf 7 and the drawer 11 may be disposed in the storage spaces thereof and may
be guided along rails 14 disposed at both sides thereof. As shown, the refrigerating
space door 5 and the freezer space door 6 each include a door basket 9 to suitably
store containers containing beverages.
[0046] According to an embodiment of the present disclosure, a deep freezer portion 100
is disposed in the freezer space 10. The space of the freezer space 10 is divided
into a left portion and a right portion for efficient use by a partition wall 12 that
extends vertically and disposed at a center of the freezer space. Referring to FIG.
2, the partition wall 12 is inserted into the freezer space from a front of the cabinet
and may be supported by an installation guide 13 disposed on a bottom of the refrigerator
in the freezer space 10.
[0047] According to an embodiment of the present disclosure, it is exemplified that the
deep freezer portion 100 is disposed at an upper portion of the right side of the
freezer space 10. However, the deep freezer portion 100 of the present disclosure
is not necessarily limited to be disposed in the freezer space. That is, the deep
freezer portion 100 according to an embodiment of the present disclosure may be disposed
in the refrigerating space 20. However, if the deep freezer portion 100 is disposed
in the freezer space 10, a temperature difference between an inside of the deep freezer
portion 100 and an outside (in the atmosphere of the freezer space) of the deep freezer
portion 100 is smaller. Therefore, the freezer space 100 may advantageously include
the deep freezer portion 100 from the viewpoint of preventing leakage of cold air
or heat insulation.
[0048] Meanwhile, the thermoelectric element module 200 is an assembly in which a cold sink
210, a thermoelectric module 230, a heat insulation material 220, and a heat sink
240 are stacked and accommodated in module housing 250 to form a module.
[0049] The thermoelectric module 230 uses a Peltier effect. The Peltier effect refers to
a phenomenon in which, when a DC voltage is applied to both ends of two different
materials, heat is absorbed at one side thereof and is emitted at the other side thereof
according to a current direction.
[0050] The thermoelectric module includes n-type semiconductor material using an electron
as a main carrier and p-type semiconductor material using a hole as a carrier that
are alternately connected in series. An electrode is disposed on a first surface thereof
to flow current from the p-type semiconductor material to the n-type semiconductor
material and an electrode is disposed on a second surface thereof to flow current
from the n-type semiconductor material to the p-type semiconductor material according
to one of current directions. In this case, when the current is supplied in a first
direction, a first surface is a heat absorbing surface and the second surface is a
heating surface, and when a current is supplied in a second direction that is opposite
to the first direction, the first surface is a heating surface and the second surface
is a heat absorbing surface.
[0051] According to an embodiment of the present disclosure, as the thermoelectric element
module 200 is inserted into a front side of the grill fan assembly 15 from a rear
side thereof, is coupled to the front side of the grill fan assembly 15, and the deep
freezer portion 100 is disposed in front of the thermoelectric element module 200,
heat absorption may occur at a front surface of the thermoelectric module 230, that
is, a surface facing the deep freezer portion 100 and heat generation may occur on
a rear surface of the thermoelectric module, that is, a surface against the deep freezer
portion 100 or an opposite surface to a surface directing toward the deep freezer
portion 100. In addition, when the current is supplied in the first direction in which
the heat absorption occurs at the surface of the thermoelectric module 230 facing
the deep freezer portion 100 and the heat generation occurs at the opposite surface
thereto, the deep freezer portion 100 may be frozen.
[0052] In an embodiment of the present disclosure, it is exemplified that the thermoelectric
module 230 has a flat plate shape with the front surface and the rear surface, and
the front surface thereof is the heat absorbing surface 230a and the rear surface
thereof is the heating surface 230b. The DC power is supplied to the thermoelectric
module 230 and causes the Peltier effect, thereby transferring a heat generated on
the heat absorbing surface 230a of the thermoelectric module 230 to the heating surface
230b. Therefore, the front surface of the thermoelectric module 230 becomes a cold
surface and the rear surface thereof becomes a heat generating portion. That is, it
simplifies that the heat inside the deep freezer portion 100 is discharged to an outside
of the deep freezer portion 100. Power is supplied to the thermoelectric module 230
through a conducting wire of the thermoelectric module 230.
[0053] The cold sink 210 is stacked in contact with the front surface of the thermoelectric
module 230, that is, the heat absorbing surface 230a facing the deep freezer portion
230. The cold sink 210 may be made of metal such as aluminum having high thermal conductivity
or an alloy and includes a plurality of heat exchange fins 211 on a front surface
thereof. The plurality of heat exchange fins 211 extend vertically and are spaced
apart from one another in a horizontal direction. The heat exchange fin 211 preferably
extends vertically and has a continuous shape without interruption. This shape is
configured such that water which has been melted at a time of defrosting the cold
sink 210 easily flows down from the cold sink in the direction of gravity along the
heat exchange fin 211 having the continuous shape and that extends vertically. A distance
between the heat exchange fins 211 is preferably a distance to prevent water formed
between the two neighboring heat exchange fins 211 from flowing down by surface tension.
[0054] In the cold sink 210 attached to the heat absorbing surface of the thermoelectric
module, air inside the deep freezer portion 100 flows and exchanges heat. In this
case, a phenomenon occurs in which food stored in the deep freezer portion 100 is
cooled and moisture with air is frozen on the surface of the cold sink 210, which
is colder. To remove the frozen water, power is applied in the above-described current
supply direction, that is, in a second direction opposite to the first direction.
In this case, the heat absorbing surface and the heating surface of the thermoelectric
element module 200 are changed to each other in contrast to the power applied in the
first direction. In this case, the surface of the thermoelectric module contacting
the heat sink is a heat absorbing surface and the surface contacting the cold sink
210 is a heating surface. Therefore, the water frozen on the cold sink 210 is melted
and flows down in the direction of gravity, thereby occurring defrost. That is, according
to the present disclosure, when dew condensation occurs on the cold sink 210 and defrost
is required, defrost may occur by applying the current in the second direction opposite
to the first direction, which is the direction of the current applied for deep cooling.
[0055] The heat sink 240 is stacked in contact with the rear surface of the thermoelectric
module 230, that is, the heating surface 230b provided in a direction opposite to
an arrangement direction of the deep freezer portion 100. The heat sink 240 rapidly
dissipates or discharges heat generated on the heating surface 230b by the Peltier
effect and may include an evaporator 37 of a refrigeration cycle cooling device 30
used to cool the refrigerator. That is, when low-temperature and low-pressure liquid
refrigerant that has passed through an expansion device 35 in the refrigeration cycle
absorbs the heat or evaporates while absorbing the heat in the heat sink 240, the
refrigerant in the refrigeration cycle absorbs or evaporates while absorbing the heat
generated on the heating surface 230b of the thermoelectric module 230 to immediately
cool the heat generated on the heating surface 230b.
[0056] As the above-described cold sink 210 and heat sink 240 are stacked and the thermoelectric
module 230 having the flat shape is disposed between the cold sink 210 and the heat
sink 240, it is necessary to isolate heat between them. Therefore, the thermoelectric
element module 200 of this embodiment includes the heat insulating material 220 that
surrounds a circumference of the thermoelectric module 230 and to fill a gap between
the cold sink 210 and the heat sink 240. That is, an area of the cold sink 210 is
larger than that of the thermoelectric module 230 and is substantially the same as
the heat insulating material 220. Similarly, an area of the heat sink 240 is larger
than that of the thermoelectric module 230 and is substantially the same as the heat
insulating material 220.
[0057] Meanwhile, the cold sink 210 and the heat sink 240 do not need to have the same size
as each other and the size of the heat sink 240 may be larger to effectively dissipate
the heat.
[0058] According to this embodiment, for immediate and reliable heat dissipation from the
heat sink 240, an inlet pipe 241 and an outlet pipe 243 pass through the heat sink
240 to flow the refrigerant of the refrigeration cycle cooling device 30. The refrigerant
evaporates in the heat sink 240 and rapidly absorbs the heat from the heating surface
of the thermoelectric module 230 as evaporation heat by defining a flow path of the
refrigerant over an entire area of the heat sink 240. In addition, the module housing
250 includes a pipe through-hole 255 to pass the inlet pipe 241 and the outlet pipe
243.
[0059] That is, the heat sink 240 in this embodiment is designed to have a size sufficient
to immediately absorb and discharge the heat generated by the thermoelectric module
230 and the cold sink 210 may have a smaller size than that of the heat sink 240.
However, in this embodiment, heat exchange efficiency of the cold sink 210 is improved
by increasing the size of the cold sink 210 considering that the cold sink 210 exchanges
heat between gas and solid while the heat sink 240 exchanges heat between liquid and
solid. A degree of increasing the size of the cold sink is exemplified as follows.
In this embodiment, the cold sink is designed to have a size corresponding to that
of the heat sink in consideration of a compact size of the thermoelectric module.
However, the size of the cold sink may be larger than that of the heat sink to improve
the heat exchange efficiency of the cold sink.
[0060] Meanwhile, the module housing 250 includes an accommodator 251 and a fixer 257. The
accommodator 251 accommodates the cold sink 210, the thermoelectric module 230, the
heat insulating material 220, and the heat sink 240 in the stacked state. The fixer
257 is disposed on an opposite surface to a surface of the module housing 250 having
the accommodator 251 and couples the module housing 250 to the inner case 4. In addition,
the accommodator 251 defines a fastening boss 253, and the cold sink 210, the heat
insulating material 220, and the heat sink 240 each include a through-hole at a position
corresponding to that of the fastening boss 253. When the fastening member 213 is
coupled to the fastening boss 253 through the through-holes thereof, the cold sink
210, the thermoelectric module 230, the heat insulating material 220, and the heat
sink 240 in the stacked state may be coupled to the accommodator 251.
[0061] Meanwhile, the refrigeration cycle cooling device 30 of the refrigerator according
to this embodiment discharges heat from the inside of the freezer space to an outside
of the refrigerator using refrigerant that circulates in a thermodynamic cycle including
evaporation, compression, condensation, and expansion. A compressor 31 and a condenser
33 of the cooling device 30 are disposed in a machine room defined at a lower portion
of a rear side of the freezer space 100 and isolated from the freezer space 100. A
grill fan assembly 15 including a grill fan defining the rear wall of the freezer
space and a shroud coupled to a rear side of the grill fan to distribute cold air
in the freezer space is disposed between the freezer space and the rear wall of the
inner case 4.
[0062] In addition, the evaporator 37 of the refrigeration cycle cooling device 30 is disposed
in a predetermined space between the grill fan assembly 15 and the rear wall of the
inner case 4. When the refrigerant inside the evaporator 37 is evaporated, the evaporating
refrigerant exchanges heat with the air flowing in the inner space of the freezer
space 10, and the air cooled by the heat exchange is distributed in a cold air distribution
space defined by the grill fan and the shroud and flows in the freezer space 10, thereby
cooling the freezer space 10.
[0063] The refrigeration cycle cooling device of the present disclosure includes an evaporator
37 to evaporate by heat exchanging liquid refrigerant in a low-pressure atmosphere
with air in the cooling space (the space between the grill fan assembly and the inner
housing), a compressor 31 to pressurize gaseous refrigerant vaporized by the evaporator
and discharge high-temperature and high-pressure gaseous refrigerant, a condenser
33 to heat-exchange the high-temperature and high-pressure gaseous refrigerant discharged
from the compressor with air outside of the refrigerator (the machine room) and condense
to discharge heat, an expansion device 35 such as a capillary tube to reduce a pressure
of the refrigerant condensed by the condenser 33 in the low-temperature atmosphere.
The low-temperature and low-pressure liquid refrigerant with the pressure being lowered
by the expansion device 35 is introduced into the evaporator again.
[0064] According to the present disclosure, as the heat of the heat sink 240 of the thermoelectric
element module 200 has to be rapidly cooled, the low-temperature and low-pressure
liquid refrigerant with the pressure and the temperature being lowered through the
expansion device 35 is introduced into the heat sink 240 of the thermoelectric element
module 200 before the low-temperature and low-pressure liquid refrigerant is introduced
into the evaporator 37.
[0065] More specifically, the compressor 31 pressurizes the high-temperature and low-pressure
gaseous refrigerant to discharge the high-temperature and high-pressure gaseous refrigerant.
In addition, the refrigerant generates heat in the condenser 33 and is condensed,
that is, liquefied. As described above, the compressor 31 and the condenser 33 are
each disposed in the machine room of the refrigerator.
[0066] Low-temperature and high-pressure liquid refrigerant liquefied by the condenser 33
passes through a device such as the expansion valve, for example, the capillary tube
and flows into the evaporator 37 with the pressure being lowered. In the evaporator
37, the refrigerant is evaporated while absorbing surrounding heat. According to this
embodiment, after the refrigerant passes through the condenser 33, the refrigerant
is branched into a refrigerating space evaporator 37b or a freezer space evaporator
37a. In this case, the heat sink 240 of the thermoelectric element module 200 is disposed
in front of the freezer space evaporator 37a and is disposed behind the expansion
device 35 in the flow path of the refrigerant.
[0067] The deep freezer portion 100 has to maintain a maximum temperature of minus 50 degrees
Celsius. When the heating surface 230b of the thermoelectric module 230 maintains
a cold state, the heat absorbing surface 230a easily maintains a colder state. Accordingly,
a coldest state thereof may be maintained by disposing the heat sink 240 through which
the refrigerant passes in front of the freezer space evaporator 37a in the flow path
of refrigerant. In particular, as the heat sink 240 directly contacts the thermoelectric
module 230 and absorbs heat from the thermoelectric module 230 in a conductive manner
using a thermal conductor such as metal, the heating surface 230b of the thermoelectric
module 230 may definitely be cooled.
[0068] Meanwhile, if a user does not want to cool the deep freezer portion 100 to minus
50 degrees Celsius, but want to use it at about minus 20 degrees Celsius like a normal
freezer space, the deep freezer portion 100 may be used as a general freezer portion
by not supplying a power to the thermoelectric module 230. If the power is not supplied
to the thermoelectric module 230 as described above, heat absorption and heat generation
do not occur in the heat sink 240 stacked on the thermoelectric module 230. Accordingly,
the refrigerant passing through the heat sink 240 does not absorb heat and flows into
the freezer space evaporator 37a in a state of liquid that is not evaporated.
[0069] Hereinafter, in this embodiment, complete opening of the freezer space door 6 refers
that the door basket 9 of the freezer space door 6 is disposed outside of a front
side of the freezer space 10 as shown in FIG. 1 and incomplete opening thereof refers
that a portion of the door basket 9 is disposed at the front side of the freezer space
10.
[0070] In addition, in various embodiments of the disclosure described below in this document,
the front of the deep freezer portion, the front of the housing, the front of the
freezer space, or in the same context, the front refer to a side facing the door of
the refrigerator, and the rear of the deep freezer portion, the rear of the housing,
the rear of the freezer space, or in the same context, the rear refers to a side opposite
to the front side, that is, a portion facing the refrigerator door.
[0071] In addition, some components use the same name, but the components are different
from each other and are described differently throughout the specification using different
reference numerals. For example, a guide rail 16 described in FIGS. 5, 6 and 12 and
a guide rail 173 described in FIGS. 15 and 16 are different components and are clearly
differently described through the specification as different components using the
different reference numerals.
[0072] FIG. 5 shows a deep freezer portion separated from a freezer space according to an
embodiment of the present disclosure. (a) of FIG. 6 is an enlarged view of a guide
rail disposed on the inner wall of a freezer space. (b) of FIG. 6 is a rear view of
the deep freezer portion in FIG. 5. (a) and (b) of FIG. 7 show a deep freezer portion
coupled to a freezer space. FIGS. 8 and 9 are perspective view of the deep freezer
portion in FIG. 5.
[0073] Referring to FIGS. 5 to 9, the refrigerator of this embodiment includes a refrigerating
space 20 defining an opening at a front side thereof and a freezer space 10 partitioned
from the refrigerating space 20 and defining an opening at a front side thereof, the
freezer space 10 may include a deep freezer portion 100 forming a separated additional
space and disposed inside of the freezer space 10. The deep freezer portion 100 may
be detachably provided inside the freezer space 10 for maintenance.
[0074] In detail, an inner portion of the freezer space 10 may be divided by the partition
wall fitted onto the installation guide 13 and the deep freezer portion 100 may be
inserted into any one of the partitioned spaces. The guide rail 16 is disposed on
the inner side wall of the freezer space 10 and a guide member slidable along the
guide rail 16 is disposed on the outer side wall of the housing 110. The guide member
is moved along the guide rail 16 to insert and draw out the deep freezer portion 100
into and from any one of the partitioned inner spaces of the freezer space 10.
[0075] A freezing and evaporating space may be disposed at a rear side of the freezer space
10, the refrigeration cycle cooling device 30 may be disposed in the freezing and
evaporating space, and the freezing and evaporating space and the freezer space 10
may be partitioned by the grill fan assembly 15 and the inner case 4.
[0076] The grill fan assembly 15 includes a grill fan defining a rear surface of the freezer
space, a shroud and a fan 17 defining a flow path to supply cold air generated in
the freezing and evaporating space to the freezer space 10 and may define the rear
surface of the freezer space 10. The grill fan includes an upper flow path 18a and
a lower flow path 18b on and under the fan 17 to provide a flow path through which
air discharged from the fan 17 and introduced into the deep freezer portion 100 circulates
inside the deep freezer portion 100. The flow path provided inside the deep freezer
portion 100 is described below.
[0077] Meanwhile, the thermoelectric element module 200 is disposed between the shroud and
the inner case 4, the fan 17 is disposed on the front surface of the thermoelectric
element module 200, and the deep freezer portion 100 is disposed on the front surface
of the fan 17. Here, the front surface refers to a surface facing the inside of the
freezer space 10 from the inner case 4 of the freezer space 10 and the rear surface
refers to a surface facing the inner case 4 of the freezer space 10 from the inside
of the freezer space 10.
[0078] That is, the fan 17 supplies, to the deep freezer portion 100, cold air having 'deep
temperature' by the thermoelectric element module 200 and may be provided separately
from a fan to supply cold air to the freezer space 10.
[0079] In addition, the housing 110 defines an opening 111F opened and closed by the door
130 and an opening 111R in which the thermoelectric element module 200, the fan 17,
and the like may be disposed. The opening 111F is defined on the front surface of
the housing 110 and is described below as an open portion on the front surface of
the housing, and the opening 111R is described below as an open portion on the rear
surface of the housing.
[0080] Meanwhile, a conducting wire (L) is drawn out through one side of the housing 110
to supply power to a heating wire 1117 disposed along a circumference of the opening
111F that is open and defined on the front surface of the housing 110. As the housing
110 has a large temperature difference between an inside of the housing 110 and an
outside of the housing 110, a phenomenon in which liquid freezes around the opening
111F and the deep freezer portion door 130 may occur. The heating wire is provided
to melt the frozen liquid. In addition, the deep freezer portion 100 may be more tightly
closed by supplying an induced current to a portion of the deep freezer portion door
130 using the conducting wire (L). That is, the conducting wire (L) may supply power
to a load that may be provided in the deep freezer portion 100.
[0081] The conducting wire (L) is disposed along the guide rail 16 and may be guided together
when the deep freezer portion 100 is inserted and is drawn out along the guide rail
16. If the conducting wire (L) is caught in a gap between the housing 110 and the
side surface of the freezer space 10, the deep freezer portion 100 may be not easily
inserted and drawn out, and furthermore, coating of the conducting wire (L) is peeled
off, which causes malfunction and exposure to a risk of accident. Therefore, the conducting
wire (L) may be guided in a groove of the guide rail 16.
[0082] Referring to the enlarged view of a side surface of a lower portion of the housing
110, a guide member protrudes from the lower portion of the housing 110, includes
a hole 1101 at one side thereof, and the conducting wire (L) may be drawn out to the
outside of the housing 110 through the hole 1101. To prevent the conducting wire (L)
from being caught in the gap between the side gap between the housing 110 and the
side surface of the freezer space 10, a cover 1102 may be disposed above the hole
1101 to cover at least a portion of the hole 1101 and may be spaced apart from the
hole 1101 by a predetermined distance.
[0083] Meanwhile, with respect to the structure in which the deep freezer portion 100 is
separated from the inside of the freezer space 10, the freezer space 10 defines a
space with an open front side, includes the guide rail 16 that extends from a front
side thereof to a rear side thereof, and the guide rail 16 may include a fixing member
161 inserted into a fitting groove 115 of the housing 110 on a rear surface of the
freezer space 10.
[0084] The deep freezer portion 100 may be disposed inside the freezer space 10 by sliding
along the guide rail 16. When the deep freezer portion 100 is disposed in the freezer
space 10, the fan 17 and the thermoelectric element module 200 are each disposed behind
the deep freezer portion 100.
[0085] When the deep freezer portion 100 is disposed in the freezer space 10, if the fan
17 and the thermoelectric element module 200 are misaligned with the opening 111R
or a gap is formed, cold air introduced into the deep freezer portion 110 may leak.
Therefore, the user may check that the deep freezer portion 100 is disposed in the
freezer space 10 at a right position by physical coupling between the fitting groove
115 and the fixing member 161.
[0086] Meanwhile, the fitting groove 115 may be defined closer to the rear surface of the
housing 110 and the fixing member 161 may be disposed closer to the rear surface of
the freezer space 10 on the guide rail 16 to intuitively notify, to the user, that
there is no gap between the rear surface of the deep freezer portion 100 and the thermoelectric
element module 200. However, the fitting groove 115 and the fixing member 161 are
not limited by the positional limitations. The fitting groove 115 may be defined at
a portion of the outer surface of the housing 110 and the fixing member 161 may be
provided outside of a movement path of the deep freezer portion 100 on the guide rail
16.
[0087] Accordingly, the fixing member 161 may be coupled to the fitting groove 115 when
the rear surface of the deep freezer portion 100 contacts the rear surface of the
freezer space 10. In this case, the rear surface of the deep freezer portion 100 may
refer to a surface defining the opening 111R of the housing 110 and the rear surface
of the freezer space 10 may refer to a surface of the grill fan assembly 15.
[0088] As described above, the front surface and the rear surface refer to the front surface
opened and closed by the door in front of the freezer space with respect to the storage
space of the freezer space and the rear surface facing the front surface and the standards
are not interpreted differently depending on components.
[0089] The fixing member 161 is elastically supported on the guide rail 16, and when the
fixing member 161 is coupled to the fitting groove 115, the fixing member 161 may
be elastically deformed and then restored. The elastic deformation and restoration
refers that the degree of protrusion of the fixing member 161 from the upper side
of the guide rail 16 is elastically deformed, and the degree of protrusion may be
restored by an elastic force when the fixing member 161 is coupled to the fitting
groove 115.
[0090] In detail, the fixing member 161 has a semicircular shape with a curvature and may
protrude from the upper surface of the guide rail 16 at the position close to the
rear surface of the freezer space 10. A first side of the guide rail 16 may be disposed
at the front surface of the freezer space 10, a second side of the guide rail 16 may
be disposed at the rear surface of the freezer space 10, the guide rail 16 may extend
from the front surface of the freezer space 10 to the rear surface of the freezer
space 10, and the fixing member 161 may protrude from the upper surface of the second
side of the guide rail 16.
[0091] If the fixing member 161 is disposed at the first side (a portion facing the front
surface of the freezer space) of the guide rail 161, interference due to friction
may occur when the deep freezer portion 100 is inserted into and is drawn out from
the freezer space 10. The rear surface of the deep freezer portion 100 contacts the
grill fan assembly 15 to prevent the cold air generated from the thermoelectric element
module 200 from leaking into the freezer space 10. Therefore, the fixing member 161
is preferably disposed close to the rear surface of the freezer space 10.
[0092] Furthermore, the fitting groove 1115 may have a shape corresponding to an outer shape
of the fixing member 161 such that the fixing member 161 is in surface contact with
the fitting groove 115. The fixing member 161 of this embodiment has the semicircular
shape with the curvature, and accordingly, the fitting groove 115 may have a semicircular
shape corresponding to the curvature.
[0093] Therefore, when the user draws out the deep freezer portion door 130, the housing
110 may be prevented from being drawn out from the freezer space 10 by the coupling
between the fixing member 161 and the fitting groove 115. When the user draws out
the housing 110, the user has to pull the housing 110 by elastically deforming the
protruding portion of the fixing member 161.
[0094] That is, when the user draws out the stored material from the housing 110 by pulling
out the deep freezer potion door 130 to draw out the stored materials from the inside
of the deep freezer portion 100, the deep freezer portion 100 may be fixed inside
the freezer space 10.
[0095] Referring to FIG. 8, a configuration of the deep freezer portion 100 is described.
The deep freezer portion 100 may include housing 110 defining an opening 111F at a
front surface thereof and providing a deep-freeze space 100S and a deep freezer portion
door 130 slidable with respect to the housing 110 and to open and close the opening
111F defined on the front surface of the deep freezer portion.
[0096] In more detail, a guide member 170 is disposed at a lower portion of the deep freezer
portion door 130 and is movable along a guide rail 173 of the housing 110 to slide
the deep freezer portion door 130 to the inner space of the housing 110. The configurations
of the guide rail 173 and the guide member 170 are described below with reference
to FIGS. 14 to 17.
[0097] As the door 6 rotates, the open front portion of the freezer space 6 may be opened
and closed. Based on the opening of the front surface of the freezer space by the
rotation of the door 6, the deep freezer portion 100 is opened. The door 130 slides
to the housing 110 to open and close the opening 111F of the housing. Based on the
opening and closing thereof, the basket 150 may be inserted into and drawn out from
the housing 110 to store or draw out food in or from the deep freezer potion 100.
[0098] Meanwhile, protrusion members 113 protrude from a front side of the opening 111F
and are disposed at both sides of the deep freezer portion door 130 to prevent shaking
of the deep freezer portion door 130 when the deep freezer portion door 130 closes
the opening in contact with the opening 111F.
[0099] That is, the deep freezer portion door 130 has a width that is smaller than that
of the housing 110 and may be less interfered with the door basket 9 disposed inside
the freezer space door 6 by a difference between the width of the deep freezer portion
door 130 and the width of the housing 110 when the deep freezer portion door 130 is
drawn out.
[0100] Meanwhile, a fastener may be disposed on at least one of the deep freezer portion
door 130 or the front surface of the housing of this embodiment and may include a
first fastener 1115 and a hook 1313 disposed on the front surface of the housing and
the door 130, facing each other, and to provide a magnetic force, and a second fastener
including a coupling groove 1113 into which the hook 1313 is inserted.
[0101] The first fastener 1115 may include a magnet having magnetism and the deep freezer
portion door 130 may open and close the front open space 111F of the housing by the
magnetic force. Further, the deep freezer portion door 130 may include the hook 1313
that protrudes toward the opening 111F defined on the front surface thereof and the
hook 1313 may be inserted into the coupling groove 1113 defined at a portion of the
opening 111F defined on the front surface thereof to couple the deep freezer portion
door 130 to the front surface of the housing.
[0102] As the inside of the deep freezer portion 100 is maintained at 'deep-temperature'
which is lower than that of the inside of the freezer space, it is necessary to prevent
the cold air from leaking from the inside of the deep freezer portion 100. Therefore,
as described above, the deep freezer portion door 130 may open and close the opening
111F in contact with the opening 111F. That is, the door 130 is coupled to the housing
110 by the first fastener and the second fastener using a multiple fastening structure,
thereby effectively preventing the cold air from leaking from the inside of the deep
freezer portion.
[0103] Meanwhile, the first fastener 1115 may be made of material having magnetism by itself,
or material having the magnetism when a current flows, and may receive a current by
a conducting wire (L) drawn out to the outside of the deep freezer portion 100. The
user may adjust the magnetism based on an amount of current supply to adjust a degree
of closing thereof by contacting the deep freezer portion door 130 with the opening
111F.
[0104] In addition, the first fastener 1115 may be disposed on the deep freezer portion
door 130 or the opening 111F as described above or the first fasteners 1115 may be
disposed on the deep freezer portion door 130 and the opening 111F at positions corresponding
to each other and may be coupled by an attraction force. If the first fastener 1115
is disposed only in either one of the deep freezer portion door 130 or the opening
111F, the part where the first fastener 1115 is not disposed has to be made of material
such as iron to attach to the magnet. In this case, the weight, the production cost,
and the like of the deep freezer portion 100 may be increased. Therefore, as described
in the above example, when the magnets are disposed in the deep freezer portion door
130 and the opening 111F and are coupled to each other by the attractive force, there
is an advantage in that material of the deep freezer portion door 130 or the opening
111F may be selected as an optimal material for insulation.
[0105] Meanwhile, the hook 1313 protrudes from the deep freezer portion door 130 toward
the opening 111F. The hook 1313 is elastically supported by the deep freezer portion
door 130 in the direction of gravity to elastically deform and restore the position
of the hook 1313 when the hook 1313 is inserted into the coupling groove 1113.
[0106] The elastic deformation and restoration refers that, when the hook 1313 is inserted
into the coupling groove 1113, the hook 1313 is moved while receiving an elastic force
in an upward direction, and when the hook 1313 is coupled to the coupling groove 1113,
the position of the hook 1313 is restored.
[0107] The hook 1313 may be elastically deformed and then restored as described above, or
may be coupled to or uncoupled from the coupling groove 1313 by a switch and a button
disposed on one side of the deep freezer portion door 130.
[0108] Meanwhile, in addition to opening and closing of the opening 111F by the deep freezer
portion door 130 based on coupling between the hook 1313, the coupling groove 1113,
and the magnet 1115, the door 130 may include a gasket 1311 along a circumference
of an inner surface thereof to prevent leakage of the cold air in the deep freezer
portion 100 to outside. The hook 1313, the coupling groove 1113, and the magnet 1115
may be disposed in the area out of the circumference formed by the gasket 1311. If
the hook 1313, the coupling groove 1113, and the magnet 1115 are disposed in an area
overlapping with the gasket 1311, the effect of preventing the outflow of the cold
air by the gasket 1311 may be significantly reduced. Therefore, as described above,
the hook 1313, the coupling groove 1113, and the magnet 1115 are each preferably disposed
in the area out of the circumference of the gasket 1311.
[0109] Meanwhile, a heating wire 1117 may be disposed along the circumference of the opening
111F and may receive a power from the conducting wire (L) drawn out to an outside
of the deep freezer portion 100. The housing 110 includes a hole 1101 at one side
thereof and the conducting wire (L) may be drawn out to outside through the deep freezer
portion 100 via the hole 1101.
[0110] The deep freezer portion 100 includes the hole 1101 at the lower portion thereof
as described above and protruding members disposed at both sides of the lower portion
of the deep freezer portion 100 are provided in a path guided by a guide rail 16 of
the freezer space. Therefore, the deep freezer portion 100 may not interfere with
the protruding members when the deep freezer portion 100 is inserted into and is drawn
out from the freezer space. In addition, a cover member 1102 may be disposed at one
side of the hole 1101 and covers an upper portion of the hole 1101 to prevent an accident
such as peeling off of covering of the conducting wire (L) due to caught of the conducting
wire (L) between the deep freezer portion 100 and the inner wall of the freezer space
10.
[0111] FIGS. 10 and 11 show a deep freezer portion door and a basket.
[0112] Referring to FIGS. 10 and 11, the deep freezer portion 100 may include a basket 150
that may be inserted into and drawn out from the deep freezer portion 100 as the deep
freezer portion door 130 is opened and closed, the deep freezer portion basket 150
includes a fixing member 153 that protrudes from one side of the deep freezer portion
basket 150, and the fixing member 153 may be inserted into a groove 1315 defined on
an inner surface of the deep freezer portion door 130 to couple the deep freezer portion
basket 150 to the deep freezer portion door 130. Specifically, the fixing member 153
may be inserted into the groove 1315 defined on the inner surface of the deep freezer
portion door 130, and in the inserted state, may be separated from the groove 1315.
Accordingly, the deep freezer portion basket 150 is detachably coupled to the deep
freezer portion door 130.
[0113] The fixing member 153 has various shapes such that the fixing member 153 is inserted
into the groove 1315, and in this embodiment, the fixing member 153 has a hook shape.
[0114] That is, the deep freezer portion basket 150 may be provided separately from the
deep freezer portion door 130, include a first surface 152 facing an inner surface
of the deep freezer portion door 130 and a second surface 151 facing the first surface
152 and on which the grill is placed, and the fixing member 153 may be disposed on
the first surface 152.
[0115] In addition, a first support member 1521 protrudes from a lower side of the first
surface 152 to contact the inner surface of the deep freezer portion door 130 and
a second support member 1511 protrudes from a lower side of the second surface 151
to contact a bottom surface 112 of the housing 110.
[0116] The fixing member 153 and the first support member 1521 eacy protrude from the first
surface 152 of the basket 150, the fixing member 153 may be disposed on the first
surface 152, and the first support member 1521 may be disposed under the first surface
152. The fixing member 153 and the first support member 1521 have a relative difference
in height from the first surface 152. The first support member 1521 contacts the inner
surface of the door 130 to support a rotational moment generated from the basket 150
with respect to the fixing member 153, thereby stably gripping the basket 150 on the
inner surface of the door 130.
[0117] In addition, the basket 150 is detachably coupled to the door 130 and may be provided
at a height spaced apart from the guide member 170 by a predetermined distance. The
basket 150 is directly coupled to the inner surface of the door 130 to connect the
guide member 170 to the lower side of the door 130. Therefore, the inner space of
the housing 110 may be widely used.
[0118] If the basket 150 is not gripped by the door 130, the basket 150 has to be drawn
out based on the opening and closing of the door 130, so the basket 150 has to be
supported on the guide member 170. In this case, the guide member 170 is inevitably
slidable in the inner space of the housing 110, which is an element reducing the inner
space of the housing 110.
[0119] To maximize the use of the inner space of the housing 110, the guide member 170 is
connected to the lower side of the door 130 and slides on the housing 110 at the outside
of the inner space of the housing 110, the basket 150 has to be gripped on other configurations
than the guide member 170 and may be drawn out based on the opening and closing of
the door 130. Therefore, according to the configuration described in this embodiment,
the basket 150 may be stably gripped on the inner surface of the door 130 at the height
spaced apart from the guide member 170 by the predetermined distance.
[0120] Meanwhile, the second surface 151 may be referred to as the surface on which the
grill is disposed, and the grill 151 may define an inlet through which cold air generated
from the thermoelectric element module 200 disposed at the rear of the deep freezer
portion 100 is introduced.
[0121] In addition, the second support member 1511 protrudes from the lower surface of the
grill 151 and contacts the bottom surface 112 of the housing 110. The housing 110
define openings 111F and 111R at the front surface and the rear surface thereof and
has the bottom surface 112, an upper surface 114, and a side surface. The bottom surface
112 forms an inner bottom surface of the housing 110. The upper surface 114 forms
an inner upper surface of the housing 110. The rear surface forms an inner rear surface
of the housing 110 and defines an open space accommodating the fan 17 to introduce
cold air of the thermoelectric element module 200 into the housing 110. The side surface
extends from a front side of the housing 110 to a rear side of the housing 110 in
a depth direction.
[0122] In this embodiment, the deep freezer portion basket 150 includes the fixing member
153 disposed on the first surface 152 and inserted into the groove 1315 of the deep
freezer portion door and rotates clockwise about the contact portion between the groove
1315 and the fixing member 153. Therefore, the first support member 1521 may be disposed
under the first surface 152, that is, at an opposite side to an upper side of the
first surface 152 at which the fixing member 153 is disposed, protrudes toward the
inner surface of the deep temperature portion door 130, and contacts the inner surface
of the deep freezer portion door 130 to fix a horizontal position of the deep freezer
portion basket 150 and firmly couple to the deep freezer portion door 130.
[0123] In addition, the grill 151 may include a second support member 1511 that protrudes
from a lower surface of the grill 151 and contacting the bottom surface 112 of the
housing to prevent the deep freezer portion basket 150 from contact with the bottom
surface 112 of the housing 110 as the deep freezer portion basket 150 is tilted as
described above. In addition, a contact member 1513 is disposed in the second support
member 1511 and protrudes from the support member 1511 in the direction of gravity
to directly contact the bottom surface 112 of the housing.
[0124] That is, the basket 150 may include the first support member 1521 and the second
support member 1511 disposed at the same height. In detail, the first support member
1521 may be disposed at the lower portion of the basket 150 to support the rotational
moment generated as the fixing member 153 is disposed at the upper portion of the
basket 150 and the second support member 1511 may be disposed at the lower portion
of the basket 150 to prevent the basket 150 from being damaged due to the contact
of the basket 150 with the bottom surface 112 of the housing 110.
[0125] Meanwhile, the contact member 1513 is additionally provided in the second support
member 1511 that protrudes from the second surface 151, and for the provision, the
second support member 1511 may include a groove into which the contact member 1513
is inserted. The contact member 1513 may be injection molded by a series of processes
using the same material as the deep freezer portion basket 150 by directly contacting
the contact member 1513 with the bottom surface 112 of the housing, thereby simplifying
a process. The contact member 1513 is made of additional material having high strength,
hardness, and rigidity including POM material and may be fitted into the second support
member 1511.
[0126] FIG. 12 is a rear perspective view of a deep freezer portion. FIG. 13 is a side cross-sectional
view of FIG. 12. FIG. 14 is a state view in which a deep freezer portion door is inserted.
FIG. 15 shows a structure to limit a withdrawal distance of a deep freezer portion
door and a structure to prevent removal thereof.
[0127] Referring to FIGS. 12 to 15, a deep freezer portion 100 of this embodiment includes
housing 110 defining an opening at a front side thereof and providing a deep-freeze
space 100S having a predetermined length from the front side thereof to a rear side
thereof, a guide rail 173 that extends from one side of the housing 110 in a longitudinal
direction of the housing 110, a guide member 170 movable along the guide rail 173,
and a door 130 connected to the guide member 170 to open and close the front side
of the housing, and the guide rail 173 may extend longer than a length of the deep-freeze
space 100S.
[0128] The deep-freeze space 100S is defined inside the housing 110, is partitioned from
the inner storage space of the freezer space, and maintains a temperature lower than
that of the storage space. A boundary of the deep-freeze space 100S is defined by
an inner front surface, an inner rear surface, and an inner side surface of the housing
110. A length of the deep-freeze space 100S may refer to a length from the inner front
surface of the housing 110 to the inner rear surface of the housing 110. In addition,
as the inside of the deep-freeze space 100S is maintained at a cryogenic temperature,
the housing 110 may have a predetermined thickness for thermal insulation.
[0129] In this configuration, the guide rail 173 may extend longer than the length of the
deep-freeze space 100S and an extending length of the guide rail 173 may be close
to a distance from an outer front surface of the housing to an outer rear surface
of the housing. Referring to FIG. 12, the guide rail 173 of this embodiment may be
recessed from the outer lower surface of the housing 110 along a longitudinal direction
of the housing 110 (may extend from the outer front surface of the housing to the
outer rear surface of the housing).
[0130] The outer front surface of the housing 110 may be described as an outer surface defining
an opening 111F of the housing and the outer rear surface of the housing 110 refers
the outer surface of the housing 110 in contact with a grill fan assembly 15.
[0131] Meanwhile, the deep freezer portion door 130 is slidably provided on the guide rail
173 disposed under the housing 110 and is inserted and is drawn out based on sliding
of the guide member 170 inserted into the guide rail 173. A general freezer space
maintains a temperature of about 20 degrees Celsius, but the deep freezer portion
100 of this embodiment maintains a temperature of 40 degrees Celsius or less, which
is 'deep-temperature'. The guide rail 173 is disposed outside of the space where the
temperature of 40 degrees Celsius or less is maintained and enables sliding of the
deep freezer portion door 130.
[0132] If the guide rail is disposed inside the housing 110, there is a fear that more cold
air may leak to outside when the deep freezer portion door 130 is opened and closed,
and furthermore, freezing occurs between the guide rail and a guide, thereby degrading
sliding of the deep freezer portion door 130 and weakening durability thereof. Therefore,
the guide rail 173 of this embodiment is disposed at a lower side of the outer portion
of the housing 110 and the guide member 170 is connected to a lower side of the deep
freezer portion door 130 to slide the deep freezer portion door 130.
[0133] When the guide member 170 is connected to the lower side of the deep freezer portion
door 130 as described above, the deep freezer portion basket 150 may not be supported
by the guide member 170. That is, as the inside of the deep freezer portion 100 is
maintained at 'the deep-temperature', the deep freezer portion 100 has the thickness
for internal insulation thereof. In addition, the guide rail 173 is disposed at the
lower side of the outer portion of the housing 110 and the inner bottom surface 112
of the housing 110 is spaced apart from the guide rail 173 by an outer thickness of
the housing 110. Therefore, the deep freezer portion basket 150 has to be fixed at
a position spaced apart from the guide member 170 by a predetermined height.
[0134] Therefore, the deep freezer portion basket 150 may not be supported by and coupled
to the guide member 170 and has to be coupled to the deep freezer portion door 130
at the height spaced apart from the guide member 170 by the predetermined distance.
For the coupling, the deep freezer portion basket 150 includes a fixing member 153
and the deep freezer portion door 130 includes a groove 1315 on an inner surface thereof.
Also, the first support member 1521 protrudes from the first surface 152 of the deep
freezer portion basket to stably support the deep freezer portion basket 150. In addition,
a second support member 1511 may protrude from under a grill 151 to prevent wear of
the deep freezer portion basket 150 due to contact with the bottom surface 112 of
the housing 110 and application of an external force to food stored in the deep freezer
portion basket 150 by friction on the deep freezer portion basket 150.
[0135] Meanwhile, a first side of the guide member 170 is connected to the door 130, and
when the door 130 closes the front opening 111F of the housing 110, a second side
of the guide member 170 may be disposed behind the deep-freeze space 100S. In addition,
the guide rail 173 may communication a front side thereof with a rear side thereof,
and when the door 130 closes the front surface of the housing 110, the guide member
170 may protrude from a rear end of the guide rail 173.
[0136] The rear surface of the housing 110 is disposed inside a freezer space in contact
with a grill fan assembly 15 defining the rear surface of the storage space of the
freezer space in the freezer space. If the second side of the guide member 170 protrudes
from the rear side of the guide rail 173, the door 130 may not completely close the
front surface of the housing 110 due to the contact with the grill fan assembly 15.
[0137] The grill fan assembly 15 may include a recess 15a to accommodate the guide rail
173. A sliding movement distance of the guide member 170 is increased based on a recessed
depth of the recess 15a and the length of the guide rail 173, thereby obtaining a
longer withdrawal distance of the door 130.
[0138] That is, the guide rail 173 extends from the front side of the outer lower surface
of the housing 110 to the rear side of the outer lower surface of the housing 110
to obtain the withdrawal distance of the guide member 170, and the guide member 170
extends longer than the length of the deep freezer portion basket 150 in the longitudinal
direction of the housing and may be inserted into the guide rail 173.
[0139] If a rail defines a plurality of steps such as two or three steps to obtain the withdrawal
distance of the deep freezer portion basket 150, the durability of the guide rail
may be weakened. In addition, a guide rail has to be disposed under the deep freezer
portion to accommodate the rail having the plurality of steps and occupies larger
volume than that of the guide rail 173 to accommodate the guide member 170 of this
embodiment, thereby reducing space utilization of the deep-freeze space.
[0140] Therefore, the guide rail 173 is disposed below the housing 110 to obtain the withdrawal
distance of the one-step guide member 170 in this embodiment and extends from the
outer front surface of the housing 110 to the outer rear surface of the housing 110
to obtain the withdrawal distance of the deep freezer portion door 130.
[0141] In addition, the guide member 170 includes a roller 171 at one end thereof to slide
the guide member 170 inside the guide rail 173 while minimizing friction.
[0142] Meanwhile, the guide member 170 includes an engaging member 172 to limit a sliding
distance of the deep freezer portion door 130 and the guide rail 173 includes a stopper
1731 disposed at one side thereof. The sliding distance of the deep freezer portion
door 130 may be limited by contacting the engaging member 172 with the stopper 1731.
[0143] More specifically, the engaging member 172 is disposed in front of the roller 171
in the guide member 170, and the front refers to a portion toward the door 130 with
respect to the housing 110 as described above. That is, a first end of the guide member
170 is connected to the door 130 and the roller 171 is disposed at a second end thereof.
Therefore, the engaging member 172 may be disposed in front of the roller 171 in the
guide member 170.
[0144] The stopper 1731 is disposed close to the opening 111F of the housing 110 in the
guide rail 173 and the engaging member 172 may be disposed in front of the roller
171 provided at one side of the guide member 170. That is, the guide rail 173 may
include the stopper 1731 at the front side of the outer lower surface of the housing
110 and the engaging member 172 may be provided at a portion of the guide member 170
that extends further from the deep freezer portion basket 150.
[0145] When the deep freezer portion basket 150 is removed from the deep freezer portion
door 130 and is drawn out to outside, to obtain a distance corresponding to a depth
direction (a direction toward an inner space of the housing from the deep freezer
portion door) of the deep freezer portion basket 150 in the housing 110, a sliding
distance of the deep freezer portion door 130 may be limited by contacting the engaging
member 172 with the stopper 1731. If the sliding distance of the deep freezer portion
door 130 is not limited, there is a risk in that the deep freezer portion door 130
is separated from and fall down from the housing 110.
[0146] In addition, when the engaging member 172 contacts the stopper 1731 and the deep
freezer portion door 130 is drawn out at a maximum level, a rotational moment is generated
based on the withdrawal distance of the deep freezer portion door 130. In this case,
there is a risk in that the deep freezer portion door 130 is separated from and falls
down from the housing 110. The guide rail 173 further includes a rib 1733 that protrudes
from one side thereof to prevent separation of the deep freezer portion door 120 by
contact with the guide member 170 when the deep freezer portion door 120 is rotated
in the direction of gravity.
[0147] In detail, the rib 1733 may be disposed at an inner portion of the guide rail 173
than the stopper 1731, and when the deep freezer portion door 120 rotates by receiving
the moment, the rib 1733 may contact the upper surface of the guide member 170. In
this case, the guide member 170 may include the roller 171 at the lower portion thereof
and an upper portion of the guide member 170 may extend shorter than the lower portion
of the guide member 170.
[0148] That is, the guide member 170 may have a rod shape, the upper portion thereof and
the lower portion thereof are spaced apart from each other by a predetermined distance
and extend. The engaging member 172 is disposed at the upper side of the guide member
170 and contacts the stopper 1731 disposed between the upper side and the lower side
of the guide member 170 to limit the withdrawal distance of the deep freezer portion
door 30. The lower side of the guide member 170 extends further than the upper side
of the guide member 170 in the length (depth) direction of the housing 110 from the
deep freezer portion door 130 and the roller 171 may be disposed at the extending
portion thereof.
[0149] In addition, the guide rail 173 may provide a slidable space of the guide member
170 under the housing 110 and support the guide member 170, or is recessed from the
outer surface of the housing 110. A rail cover 174 is connected to the guide rail
173 to support the guide member 170 and may move and support the guide member 170
simultaneously.
[0150] That is, when the guide rail 173 is recessed from the lower surface of the housing
and defines an opening at one side thereof, the rail cover 174 covers the open portion
thereof to define a path with four surfaces, support the load of the guide member
170, and moves the guide member 170 along the guide rail 173.
[0151] If the guide rail 173 is disposed under the lower surface of the housing 110 as the
path with the four surfaces, a thickness of the housing 110 is increased, thereby
reducing one of the storage space in the freezer space or the deep-freeze space of
the deep freezer portion or not facilitating the injection molding during the manufacturing
of the housing 110.
[0152] In addition, the housing 110 may be made of insulating material to maintain the inside
thereof at the cryogenic temperature, but it is not easy to manufacture the guide
rail 173 having all surfaces made of the insulating material and defining a path with
the four surfaces.
[0153] Therefore, the housing 110 may be easily manufactured by disposing, under the housing
110, the guide rail 173 defining the opening at one side thereof and having the recessed
shape and covering, by the rail cover 174, the open portion of the guide rail 173.
[0154] In addition, the rail cover 174 includes a fixer 1741. The fixer 1741 may couple
the rail cover 174 to the housing 110 and may include various shapes such that the
rail cover 174 is coupled to the housing 110.
[0155] Meanwhile, as described above, the rail cover 174 is connected to the guide rail
173 to form the path through which the guide member 170 may move and in which a front
side thereof communicates with a rear side thereof. When the door 130 closes the front
opening 111F of the housing 110, the second end of the guide member 170 may be disposed
behind the rear end of the rail cover 174. Therefore, the rail cover 174 does not
need to have a length corresponding to that of the guide rail 173 and may have a length
shorter than that of the guide rail 173.
[0156] Meanwhile, the deep freezer portion basket 150 may define a space to store food and
include an additional shelf 155 to partition the storage space inside the deep freezer
space basket 150.
[0157] FIG. 16 is a cross-sectional view of a flow of cold air inside a deep freezer portion,
(a) of FIG. 17 is a side cross-sectional view of a deep freezer portion. (b) of FIG.
17 is an inner top view of a deep freezer portion. (a) of FIG. 18 is a side cross-sectional
view of a freezer space. (b) of FIG. 18 is a side cross-sectional view of a grill
fan assembly. FIG. 19 is a cross-sectional view of air flow inside a deep freezer
portion.
[0158] Referring to FIGS. 16 to 19, a thermoelectric element module 200 of this embodiment
includes a thermoelectric module 230 having a heat absorbing surface 230a and a heating
surface 230b. In addition, a fan 17 faces the heat absorbing surface 230a of the thermoelectric
module and introduces cold air into the deep freezer portion 110. An accommodator
19 accommodates the fan 17, protrudes from an inner surface of the freezer space and
includes a guide 18 disposed at one side of the accommodator 19 and to guide flow
of the cold air. The housing 110 provides a flow path 1141 defined at a portion of
an inner surface of the housing and stepped from the inner surface of the housing.
[0159] The guide 18 may include an upper path 18a defined at an upper portion of the accommodator
19 and a lower path 18b defined at a lower portion of the accommodator 19.
[0160] As described above, the housing 110 defines the openings 111F and 111R on the front
surface and the rear surface, respectively, and an inner space of the housing 110
may include a bottom surface 112 facing a lower side of the deep freezer portion basket
150 and defining the bottom surface of the housing 110, an upper surface 114 facing
the bottom surface 112, and side surfaces connecting the upper surface 114, the bottom
surface 112, a front surface, and a rear surface to divide the inner space thereof
to have a cube shape.
[0161] In addition, the upper surface 114 of the housing 110 may define a stepped flow path
1141 at a portion thereof. The flow path 1141 may extend in direction of expanding
the deep-freeze space 110S in the housing 110.
[0162] The flow path 1141 includes vertical portions 1141a having a width of the flow path
and spaced apart from each other, and that extends in a longitudinal direction of
the deep freezer portion and a horizontal portion 1141b connecting one sides of the
vertical portions. The flow path 1141 may be defined on the upper surface 114 and
may have a U-shape.
[0163] The vertical portion 1141a may extend in a direction of decreasing the width of the
flow path 1141 along the longitudinal direction of the deep freezer portion. In this
case, the width between one sides of the vertical portions 1141a corresponds to a
length of the horizontal portion 114b and a width (W) of second sides of the vertical
portions 1141a may be shorter than that of the horizontal portion 1141b.
[0164] In addition, the second side of the vertical portion 1141a may communicate with the
guide 18 and the width (W) between the second sides of the vertical portions 1141a
may be the same as the guide 18.
[0165] In addition, the flow path 1141 may be inclined downward from the upper surface 114
of the housing toward the rear surface of the housing.
[0166] That is, the cold air introduced into the housing 110 through the flow path 1141
having the various shapes may be guided toward the guide 18 and may be discharged
to the outside of the housing 110.
[0167] Meanwhile, the vertical portions 1141a extend in parallel while maintaining the width
of the horizontal portion 1141b at one side thereof and then extend in a direction
of decreasing the width of the vertical portions at a predetermined area of the second
side of the vertical portion 1141a. A bending portion 1145 may decrease the width
of the vertical portions. The flow path 1141 may have inclination at the bending portion
1145. The step of the flow path 1141 defines a flow path through which cold air flows
inside the housing. The bending portion 1145 and an inclined portion 1143 may be disposed
at the second side of the vertical portion 1141a to obtain an area of the flow path
and guide the cold air to the guide 18.
[0168] Meanwhile, the deep freezer portion basket 150 is spaced apart from the bottom surface
112 by a predetermined height and a second flow path 1121 may be defined in a space
between the bottom surface 112 and the basket 150. When the flow paths are respectively
defined on the upper surface 114 and the bottom surface 112 of the housing 110 as
described above, the flow path 1141 defined on the upper surface of the housing refers
to a first flow path.
[0169] A height of the basket 150 is smaller than that of the housing 110 and the basket
150 may be coupled to the inner surface of the door 130 at a position spaced apart
from each of the upper surface 114 and the bottom surface 112 of the housing.
[0170] The movement path of cold air by the above configuration is described. The cold air
is introduced into the housing by a thermoelectric module and a fan accommodated in
the accommodator 19 and the introduced cold air passes through a grill disposed on
the rear surface of the basket 150. That is, the cold air moves from the rear surface
of the housing 110 to the front surface of the housing and a flow of the cold air
from the front surface of the housing 110 to the rear surface of the housing 110 is
divided into an upper flow of the housing 110 and a lower flow of the housing 110
at the front surface thereof.
[0171] In detail, referring to FIG. 16, a flow (f1) of cold air flowing into the housing
through the thermoelectric element module and the fan directs the front surface of
the housing from the rear surface of the housing, and the flow circulating to the
rear surface of the housing from the front surface of the housing may be divided into
a flow (f2) guided along the first flow path 1141 of the housing and a flow (f3) guided
along the second flow path 1121.
[0172] The first flow path 1141 communicates with the upper flow path 18a, may provide a
space sufficient to move the cold air by the horizontal portion 1141b and the vertical
portion 1141a as described above and may easily introduce the cold air to the upper
flow path 18a by the bending portion 1145 and the inclined portion 1143.
[0173] Meanwhile, the upper flow path 18a may include a guide inclined portion 181a to guide
flow of the cold air to minimize an element that may act as a resistance to the flow
of the cold air moving along the bending portion 1145 and the inclined portion 1143.
The guide inclined portion 181a may be inclined downward from the lower portion of
the upper flow path 18a along the flow path through which the cold air moves and may
prevent interruption of flow that may occur at the communication portion between the
first flow path 1141 and the upper flow path 18a.
[0174] The second flow path 1121 communicates with the lower flow path 18b. In this case,
the second flow path 1121 and the lower flow path 18b do not form a step. Preferably,
the second flow path 1121 and the lower flow path 18b may form a parallel surface
and communicate with each other. That is, a height of the lower flow path 18b may
correspond to a height between the lower surface of the basket 150 and the bottom
surface 112.
[0175] In addition, the flow path and the guide communicate with each other when the housing
110 is coupled to the inner side of the freezer space, that is, when the accommodator
19 is inserted into and coupled to the opening 111R defined on the rear surface of
the housing 110.
[0176] Meanwhile, as the bending portion 1145 is defined at the second side of the vertical
portion 1141a and is bent in the direction of decreasing the width of the first flow
path 1141, the inclined portion 1143 may be defined radially along the boundary surface
of the bending portion 1145. Even in this case, a width (W) determined by the bending
portions 1145 has to correspond to the width of the upper flow path 18a.
[0177] Hereinabove, representative embodiments of the present disclosure are described.
However, a person having ordinary knowledge in the art to which the present disclosure
pertains will understand that various modifications can be made to the above-described
embodiments within the scope that does not deviate from the scope of the present disclosure.
Therefore, the scope of the present disclosure should not be limited to the described
embodiments, but should be defined based on claims described below and equivalents
to the claims.
[Description of Symbols]
1: |
Refrigerator |
2: |
Body |
3: |
Outer case |
4: |
Inner case |
5: |
Refrigerating space door |
6: |
Freezer space door |
7: |
Shelf |
8: |
Hinge |
9: |
Door basket |
10: |
Freezer space |
11: |
Drawer |
12: |
Partition wall |
13: |
Installation guide |
14: |
Rail |
15: |
Grill fan assembly |
16: |
Guide rail |
17: |
Fan |
18a: |
Upper flow path |
18b: |
Lower flow path |
19: |
Accommodator |
20: |
Refrigerating space |
30: |
Cooling device |
31: |
Compressor |
33: |
Condenser |
35: |
Expansion device |
37: |
Evaporator |
|
|
100: |
Deep freezer portion |
110: |
Housing |
|
|
130: |
Deep freezer portion door |
|
|
150: |
Deep freezer portion basket |
170: |
Guide |
200: |
Thermoelectric element module |