Technical Field
[0001] The present invention relates to a heating cooking apparatus which heats and cooks
a subject to be heated which is placed in a heating chamber by means of hot air supplied
from a heat source.
Background Art
[0002] As an example of general heating cooking apparatus, a heating cooking apparatus as
shown in Fig. 11 has been known (refer to, for example, Patent Document 1).
As shown in Fig. 11, in a heating cooking apparatus 100 disclosed in the Patent Document
1, a heating chamber 102 is located inside an apparatus body 101, and a door 104 is
disposed openably and closably at an opening 103 for putting food into or taking food
out of the heating chamber 102. At the back of a heating chamber rear wall 105, a
hot air chamber 110 is provided, and an electric heater 106 and a hot air circulating
fan 107 rotationally driven by a motor 108 are provided in the hot air chamber 110.
Generally, an upper surface and right and left side surfaces of the heating chamber
102, and a heating chamber side surface of the heating chamber rear wall 105 are subjected
to coating, while a hot air chamber 110 side surface of the heating chamber rear wall
105 is not subjected to coating.
Accordingly, the electric heater 106 heats air in the hot air chamber 110, the heated
hot air is sent into the heating chamber 102 from an air port provided in the heating
chamber rear wall 105, and the food placed on a placing base 109 is heated and cooked.
Patent Document 1: Japanese Patent No. 3259473 (Fig. 1)
Disclosure of Invention
Problems to be Solved by the Invention
[0003] Since the heating cooking apparatus raises the temperature in the heating chamber
from the same state as the chamber temperature to a predetermined cooking temperature
thereby to heat and cook the food, reduction of rise time is required in order to
reduce the heating and cooking time. Further, also from a viewpoint of energy saving,
the reduction of heating and cooking time is desired.
[0004] The present invention, which has been made in order to solve the existing problem,
has an object to provide a heating cooking apparatus which can reduce heating and
cooking time by reducing the time for which temperature in a heating chamber is raised
to a desired temperature.
Means For Solving the Problems
[0005] A heating cooking apparatus according to the present invention includes a heating
chamber which accommodates a subject to be heated therein; and a heat source chamber
which is adjacent to the heating chamber through a partition plate located at a back
portion of the heating chamber, and accommodates therein a heat source and a circulating
fan which circulates heat supplied from the heat source. Herein, the heat source is
formed in the shape of a plurality of spirals, the circulating fan is arranged in
the inside of the circumference of the heat source, and the spaced dimension between
the heat source and the circulating fan is less than 10mm.
[0006] According to this component, since the distance between the heat source formed in
the spiral shape in order to heat the air in the heat source chamber and the circulating
fan is as close as less than 10mm, a heat exchange efficiency improves. Therefore,
when the hot air of which the temperature has been raised by the heat source in the
heat source chamber is sent into the heating chamber by the circulating fan to perform
heat-cooking, the time for raising the temperature of the air in the heat source chamber
to a predetermined temperature can be reduced, and the power saving can be realized.
[0007] Further, the heating cooking apparatus according to the present invention includes
the heating chamber which accommodates the subject to be heated therein; and the heat
source chamber which is adjacent to the heating chamber through the partition plate
located at the back portion of the heating chamber, and accommodates therein the heat
source and the circulating fan which circulates heat supplied from the heat source.
Herein, the heat source is formed in the shape of the plurality of the spirals, the
circulating fan is arranged in the inside of the circumference of the heat source,
the heat source and the circulating fan are arranged close to each other, and a plane
shape along a rotation axis of the circulating fan expands toward an outer periphery
of the circulating fan.
[0008] According to this component, since the shape of the circulating fan for sending the
air in the heat source chamber heated by the heat source into the heating chamber
expands toward the outer periphery, the area of the circulating fan increases, so
that the heat from the heat source is easily stored in the circulating fan. Accordingly,
the heat from the heat source is stored in the circulating fan, and next the heat
is radiated by the ventilation operation of the circulating fan, with the result that
the circulating fan heats the air in the heat source chamber as a second heat source.
Therefore, when the hot air of which the temperature has been raised by the heat source
in the heat source chamber is sent into the heating chamber by the circulating fan
to perform heat-cooking, the time for raising the temperature of air in the heat source
chamber can be reduced. Further, since the time necessary to raise the temperature
is reduced, power saving can be realized.
[0009] Further, in the heating cooking apparatus according to the present invention, an
end in a rising direction of a vane portion of the circulating fan does not protrude
from an end portion in a spiral axial direction of the heat source.
[0010] According to this component, since the vane portion of the circulating fan rotates
within an inner range of the spiral heat source, the heat exchange efficiency improves.
Therefore, when the hot air of which the temperature has been raised by the heat source
in the heat source chamber is sent into the heating chamber by the circulating fan
to perform heat-cooking, the time for raising the temperature of the air in the heating
chamber to the predetermined temperature can be reduced, and the power saving can
be realized.
[0011] Further, the heating cooking apparatus according to the present invention includes
the heat source chamber which accommodates the circulating fan therein, wherein a
plane area of the heat source chamber along a depth direction of the heating chamber
is substantially the same as a plane area of the heating chamber along the depth direction
of the heating chamber.
[0012] According to this component, since the sectional area of the heat source chamber
is substantially the same as the sectional area of the heating chamber, the air can
be sent from corners of the heating chamber, so that ventilation efficiency improves
and the air can be evenly sent all over the heating chamber. Therefore, when the hot
air of which the temperature has been raised by the heat source in the heat source
chamber is sent into the heating chamber by the circulating fan to perform heat-cooking,
uniformity of heat distribution in the heating chamber can be realized, the time for
raising the temperature of the air in the heat source chamber to the predetermined
temperature can be reduced, and the power saving can be realized.
[0013] Further, the heating cooking apparatus according to the present invention includes
the heat source chamber which accommodates the circulating fan therein, wherein the
heat source is formed in a spiral shape, the circulating fan is arranged inside the
circumference of the heat source, and a fixing member for fixing the heat source onto
a depth surface of the heat source chamber has a wall portion which contacts a side
surface of the heat source chamber.
[0014] According to this component, since the fixing member for fixing the heat source formed
in a spiral shape onto the heat source chamber has the wall portion which contacts
the side surface of the heat source chamber, this wall portion regulates the air circulating
direction, so that the hot air can be efficiently supplied into the heating chamber.
Therefore, when the hot air of which the temperature has been raised by the heat source
in the heat source chamber is sent into the heating chamber by the circulating fan
to perform heat-cooking, the time for raising the temperature of the air in the heating
chamber to the predetermined temperature can be reduced, and power saving can be realized.
[0015] Further, a heating cooking apparatus according to the present invention includes
a heating chamber which is formed by a cylindrical portion and a partition plate,
and accommodates a subject to be heated therein; and a heat source chamber which is
adjacent to the heating chamber through the partition plate, and accommodates therein
a heat source and a circulating fan for circulating heat supplied from the heat source.
Herein, a side surface on the heat source chamber side of the partition plate is provided
with heat storage component.
[0016] According to this component, since the side surface on the heat source chamber side
of the partition plate which forms a boundary between the heat source chamber and
the heating chamber is provided with heat storage component, the heat supplied from
the heat source is stored in the heat storage component, and next the heat is radiated
from the side surface on the heat source chamber side of the partition plate, with
the result that the side surface on the heat source chamber side of the partition
plate heats the air in the heat source chamber as a second heat source. Therefore,
when the hot air of which the temperature has been raised by the heat source in the
heat source chamber is sent into the heating chamber by the circulating fan to perform
heat-cooking, the time for raising the temperature of the air in the heat source chamber
can be reduced. Further, since the time necessary for raising the temperature is reduced,
power saving can be realized.
[0017] Further, in the heating cooking apparatus according to the present invention, a coating
film is formed on the side surface on the heat source chamber side, whereby the heat
storage component is provided on the side surface on the heat source chamber side.
[0018] According to this component, since the coating film is formed on the side surface
on the heat source chamber side of the partition plate which forms the boundary between
the heat source chamber and the heating chamber, the heat from the heat source is
stored in the coating film, and next the heat is radiated from the coating film, with
the result that the coating film heats the air in the heat source chamber as a second
heat source. Therefore, when the hot air of which the temperature has been raised
by the heat source in the heat source chamber is sent into the heating chamber by
the circulating fan to perform heat-cooking, the time for raising the temperature
of the air in the heat source chamber can be reduced. Further, since the time necessary
for raising the temperature is reduced, power saving can be also realized.
[0019] Further, in the heating cooking apparatus according to the present invention, the
partition plate is formed of material different from material of right and left wall
surfaces of the heating chamber, whereby the heat storage component is provided on
the side surface of the heat source chamber side.
[0020] According to this component, since the material which is different from the material
of the right and left sides of the cylindrical portion forming the heating chamber
and high in endothermic efficiency, heat storage efficiency, and radiation efficiency
is used for the partition plate, the heat from the heat source is stored in the partition
plate, and next the heat is radiated from the partition plate, with the result that
the partition plate heats the air in the heat source chamber as a second heat source.
Therefore, when the hot air of which the temperature has been raised by the heat source
in the heat source chamber is sent into the heating chamber by the circulating fan
to perform heat-cooking, the time for raising the temperature of the air in the heat
source chamber can be reduced. Further, since the time necessary for raising the temperature
is reduced, power saving can be also realized.
[0021] Further, in the heating cooking apparatus according to the present invention, a rough
surface formed on a side surface on the heat source chamber side, whereby the heat
storage component is provided on the side surface of the heat source chamber side.
[0022] By this component, since the rough surface is formed on the side surface on the heat
source chamber side of the partition plate thereby to increase the surface area of
the partition plate, endothermic efficiency, heat storage efficiency, and radiation
efficiency of the partition plate can be heightened. Accordingly, the heat from the
heat source is stored in the partition plate, and next the heat is radiated from the
partition plate, with the result that the partition plate heats the air in the heat
source chamber as a second heat source. Therefore, when the hot air of which the temperature
has been raised by the heat source in the heat source chamber is sent into the heating
chamber by the circulating fan to perform heat-cooking, the time for raising the temperature
of the air in the heat source chamber can be reduced. Further, since the time necessary
for raising the temperature is reduced, power saving can be realized.
Advantages of the Invention
[0023] According to the present invention, since the distance between the heat source formed
in the spiral shape in order to heat the air in the heat source chamber and the circulating
fan is made close, the heat exchange efficiency can be improved. Therefore, it is
possible to provide a heating cooking apparatus which has advantages that: when the
hot air of which the temperature has been raised by the heat source in the heat source
chamber is sent into the heating chamber by the circulating fan to perform heat-cooking,
the time for raising the temperature of the air in the heat source chamber to a predetermined
temperature can be reduced, and the power saving can be realized.
[0024] Further, since the present invention has the component the side surface on the heat
source chamber side of the partition plate which forms the boundary between the heat
source chamber and the heating chamber is provided with heat storage component, the
heat supplied from the heat source is stored in the heat storage component, and next
the heat is radiated from the heat storage component, with the result that the heat
storage component heats the air in the heat source chamber as the second heat source.
Therefore, it is possible to provide a heating cooking apparatus which has advantages
that: the time for raising the temperature of the air in the heat source chamber can
be reduced; and the power saving can be realized by reducing the time for raising
the temperature.
Brief Description of Drawings
[0025]
Fig. 1 is a diagram showing an internal component of a heating cooking apparatus according
to a first embodiment of the present invention.
Fig. 2 is a front view of a circulating fan and an electric heater.
Fig. 3 is a perspective view showing an end shape of a vane portion of the circulating
fan.
Fig. 4 is a sectional view showing a positional relation between the circulating fan
and the electric heater.
Fig. 5A is a sectional view in a Va-Va position in Fig. 1, and Fig. 5B is a sectional
view in a Vb-Vb position in Fig. 1.
Fig. 6A is a front view showing a state where the electric heater is fixed in a heat
source chamber, and Fig. 6B is a perspective view of a fixing member.
Fig. 7A is a table showing data of a general fan and a fan having the shape according
to the present invention, and Fig. 7B is a graph for comparing the amount of air flow
between the fans in Fig. 7A.
Fig. 8 is a diagram showing an internal component of a heating cooking apparatus according
to a second embodiment of the present invention.
Fig. 9 is a diagram showing an internal component of a heating cooking apparatus according
to a third embodiment of the present invention.
Fig. 10 is a diagram showing an internal component of a heating cooking apparatus
according to a fourth embodiment of the present invention.
Fig. 11 is a sectional view of a general heating cooking apparatus.
Description of Reference Numerals
[0026]
- 10
- Heating cooking apparatus
- 20
- Heating chamber
- 21
- Cylindrical portion
- 22
- Partition plate
- 25
- Coating film (Heat storage component)
- 30
- Heat source chamber
- 30a
- Depth surface
- 31
- Electric heater (heat source)
- 32
- Circulating fan
- 32a
- Vane portion
- 34
- Fixing member
- M
- Meat (subject to be heated)
Best Mode for Carrying Out the Invention
(First embodiment)
[0027] A Heating cooking apparatus according to embodiments of the present invention will
be described below with reference to drawings.
Fig. 1 is a diagram showing an internal component of a heating cooking apparatus according
to a first embodiment of the present invention, Fig. 2 is a front view of a circulating
fan and an electric heater, Fig. 3 is a perspective view showing an end shape of a
vane portion of the circulating fan, Fig. 4 is a sectional view showing a positional
relation between the circulating fan and the electric heater, Fig. 5A is a sectional
view in a Va-Va position in Fig. 1, Fig. 5B is a sectional view in a Vb-Vb position
in Fig. 1, Fig. 6A is a front view of a heat source chamber 30, showing a state where
the electric heater is fixed in the heat source chamber, Fig. 6B is a perspective
view of a fixing member, Fig. 7A is a table showing data of a general fan and a fan
having the shape in the present invention, and Fig. 7B is a graph for comparing the
flowing amount between the fans in Fig. 7A.
[0028] As shown in Fig. 1, a heating cooking apparatus 10 according to the first embodiment
of the present invention is formed by a cylindrical portion 21 and a partition plate
22. The heating cooking apparatus 10 includes a heating chamber 20 which can accommodate
a subject to be heated, for example, meat M therein; and a heat source chamber 30
which is adjacent to the heating chamber 20 through the partition plate 22, and accommodates
therein an electric heater 31 that is a heat source, and a circulating fan 32 rotationally
driven by a motor 33 in order to circulate hot air 11 heated by this electric heater
31.
[0029] The heating chamber 20 includes a front-opened cubic box-shaped body case 23 which
is formed by the cylindrical portion 21 having a rectangular section and the partition
plate 22 that is a heating chamber rear wall, and a door 24 which is openably and
closably provided for a take-out port, which is a front surface of the body case 23,
of the subject to be heated. An inner surface (upper surface and right and left side
surfaces) of the cylindrical portion 21 in the heating chamber 20 and a side surface
of the heating chamber 20 of the partition plate 22 are subjected to heat-resisting
coating. The door 24 is coupled, for example, at its lower end by hinges to a lower
edge of the body case 23, thereby to be openable and closable in the up-down direction.
In this heating cooking apparatus 10, the heating chamber 20 and the heat source chamber
30 are separately provided, and they are connected through the partition plate 22.
Alternatively, the partition plate 22 may be attached near the rear end portion of
the body case 23 to provide the heating chamber 20 and the heat source chamber 30.
[0030] In the center portion of the partition plate 22, an intake ventilation hole 22a for
sucking air from the heating chamber 20 side to the heat source chamber 30 side is
provided; and at the surrounding portion of the partition plate 22, an air flow ventilation
hole 22b for sending air from the heat source 30 side to the heating chamber 20 side
is provided. Each of the ventilation holes 22a and 22b can be formed as many punch
holes. Accordingly, by the circulating fan 32, the air in the heating chamber 20 is
sucked from the intake ventilation hole 22a to the heat source chamber 30, and the
air in the heat source 30 heated by the electric heater 31 is sent from the air flow
ventilation hole 22b to the heating chamber 20.
[0031] Further, on a surface on the heat source chamber 30 side of the partition plate 22,
a coating film 25 having thickness of 20 to 30 µm is formed of material which is good
in endothermic efficiency, heat storage efficiency, and radiation efficiency, for
example, ceramic-based coating material. This coating film 25 constitutes heat storage
component. Hereby, the heat supplied from the electric heater 31 is stored in the
coating film 25 of the partition plate 22 once, and next the heat is radiated from
the coating film 25, with the result that the coating film 25 heats the air in the
heat source chamber 30 as a second heat source. Therefore, when the temperature of
the air in the heat source chamber 30 is raised by the electric heater 31, the temperature
rise time can be reduced, and power saving can be also realized because the time necessary
to raise the temperature is reduced.
[0032] As shown in Fig. 2, the circulating fan 32 is provided with plural sheets (for example,
8 sheets) of vane portions 32a extending from a center portion radially, and the center
of the circulating fan 32 is fixed to a rotation shaft 33a of the motor 33. The vane
portion 32a of the circulating fan 32 is, as shown in Fig. 3, formed by a bottom surface
32b parallel to a rotary plane, and a slant surface 32c which slants with respect
to the rotary plane. Accordingly, as shown by an arrow in Fig. 1, when the circulating
fan 32 is rotated by the motor 33, the air is moved backward (to the right in Fig.
1) by the slant surface 32c, the air in the heating chamber 20 is sucked into the
heat source chamber 30 from the intake ventilation hole 22a in the partition plate
22, and the hot air is sent along the inner wall of the heat source chamber 30 from
the air flow ventilation hole 22b into the heating chamber 20.
[0033] As shown in Fig. 2, the electric heater 31 is formed in a spiral shape outside the
circulating fan 32, and has the construction that a spaced dimension d between the
electric heater 31 and the circulating fan 32 is d < 10 mm. Namely, since the distance
d between the electric heater 31 which is formed, for example, in the spiral shape
in order to heat the air in the heat source chamber 30 and an outermost circumference
of the circulating fan 32 is small, heat-exchanging efficiency of sending the hot
air heated by the electric heater 31 to the heating chamber 20 can be improved, so
that the time for which the temperature in the heating chamber 20 is heated to the
desired temperature can be reduced. Further, with this reduction, power saving can
be realized.
[0034] As shown in Figs. 2 and 3, the plane shape on the rotary plane of the circulating
fan 32 expands toward the outer periphery. Namely, in Fig. 3, a relation between a
width B1 of the end portion and a width B2 of a midway portion is B1 > B2. Since the
shape of the circulating fan 32 is thus expanding toward the outer periphery, the
area of the vane portion 32a can be made large. Since the heat is easy to be stored
in this portion having the large area, the heat from the electric heater 31 is stored
in the circulating fan 32. When the heat is radiated from the circulating fan 32,
it heats the air in the heat source chamber 30 as a second heat source. Therefore,
the time for which the temperature of the air in the heat source chamber 30 is raised
can be reduced. Further, since the time necessary to raise the temperature is reduced,
the power saving can be realized.
[0035] Further, as shown in Fig. 4, the circulating fan 32 is so constructed that an end
32d in a rising direction of the vane portion 32a does not protrude from an end portion
31 a in a spiral axial direction (in the up-direction in Fig. 4) of the electric heater
31. Namely, in the circulating fan 32, the end 32d of the slant surface 32c of the
vane portion 32a rising in the spiral axial direction is included within the thickness
of the electric heater 31. Accordingly, the circulating fan 32 sends efficiently air
to a high-temperature portion around the electric heater 31 thereby not to perform
useless ventilation which does not contribute to the heat exchange, and can send efficiently
the air heated by the electric heater 31 into the heating chamber 20. Therefore, the
time for which the temperature in the heating chamber 20 is heated to the desired
temperature can be reduced, and the power saving can be realized.
[0036] Further, a plane area A2 of the heat source chamber 30 along a depth direction of
the heating chamber 20 shown in Fig. 5B is approximately the same as a plane area
A1 of the heating chamber 20 along the depth direction shown in Fig. 5A (for example,
A2 = about 0.8 × A1). Namely, since the sectional area A2 of the heat source chamber
30 is approximately the same as the sectional area A1 of the heating chamber 20, the
air heated in the heat source chamber 30 can be smoothly sent through the surrounding
portion of the heat source chamber 30 to the corners of the heating chamber 20, so
that ventilation efficiency improves and the air can be sent all over the heating
chamber 20. Therefore, the time for which the temperature in the heating chamber 20
is heated to the desired temperature can be reduced, heat distribution in the heating
chamber can be made uniform, and the power saving can be realized.
[0037] Further, as shown in Fig. 6A, the electric heater 31 is fixed onto a depth surface
30a of the heat source chamber 30 through a fixing member 34. Further, as shown in
Fig. 6B, the fixing member 34 is formed by, for example, an insulator, has a base
portion 34a for attachment onto the depth surface 30a, and is fixed onto the depth
surface 30a by a screw or the like. For the base portion 34a, a plane-shaped wall
portion 34b rising erectly is provided, and one end surface 34d of this wall portion
34b comes into contact with the side surfaces of the heat source chamber 30 (a ceiling
surface and a bottom surface in Fig. 6A). Further, for the other end portion of the
wall portion 34b, a grip portion 34c for gripping the electric heater 31 formed in
a spiral shape at a predetermined interval is provided. Accordingly, since the wall
portion 34b regulates the direction of air circulation produced by the circulating
fan 32, the hot air can be efficiently supplied into the heating chamber. Therefore,
when the hot air of which the temperature has been raised by the electric heater 31
in the heat source chamber 30 is sent into the heating chamber 20 by the circulating
fan 32 to perform heat-cooking, the time for raising the temperature of the air in
the heating chamber 20 to the predetermined temperature can be reduced, and the power
saving can be realized.
[0038] Figs. 7A and 7B show comparison in the amount of air flow Q between the general circulating
fan and the circulating fan 32 according to the present invention. Using the general
fan and the fan in the present invention which have dimensions shown in Fig. 7A, while
varying static pressure, the comparison in the amount of air flow Q was made. In result
of the test, as shown in Fig. 7B, in case that the circulating fan 32 in the present
invention is used, compared with the case where the general circulating fan is used,
assuming that the static pressure Hs can be made approximately zero due to air communication
between the heating chamber inside and the heat source chamber inside, it is founded
that the amount of air flow has increased by 40%.
As described above, in the heating cooking apparatus 10 according to the first embodiment
of the present invention, the circulating fan 32 and the electric heater 31 are located
close to each other so that the spaced dimension d between the circulating fan 32
and the electric heater 31 formed in a spiral shape outside the circulating fan 32
becomes 1mm < d < 10mm. Therefore, it is possible to improve the ventilation efficiency
of sending the hot air heated by the electric heater 31 into the heating chamber 20,
and it is possible to reduce the time for which the temperature in the heating chamber
20 is heated to the desired temperature. Further, with this reduction, the power saving
can be realized.
[0039] Further, the coating film 25 is formed on the surface on the heat source chamber
30 side of the partition plate 22 which forms the boundary between the heat source
chamber 30 and the heating chamber 20. Therefore, the heat supplied from the electric
heater 31 is stored in the coating film 25, and next the heat is radiated from the
coating film 25, whereby the coating film 25 heats the air in the heat source chamber
30 as the second heat source. Therefore, when the hot air of which the temperature
has been raised by the electric heater 31 in the heat source chamber 30 is sent into
the heating chamber 20 by the circulating fan 32 to perform heat-cooking, the time
for raising the temperature of the air in the heat source chamber 30 can be reduced.
Further, since the time necessary to raise the temperature is reduced, the power saving
can be realized.
(Second embodiment)
[0040] Next, a heating cooking apparatus according to a second embodiment of the present
invention will be described.
As shown in Fig. 8, this heating cooking apparatus 10B is formed by a cylindrical
portion 21 and a partition plate 26. The heating cooking apparatus 10B includes a
heating chamber 20 which can accommodate a subject to be heated, for example, meat
M therein; and a heat source chamber 30 which is adjacent to the heating chamber 20
through the partition plate 26, and accommodates therein an electric heater 31 that
is a heat source, and a circulating fan 32 which circulates heat supplied from this
electric heater 31. The partition plate 26 is formed of material different from material
of the cylindrical portion 31.
The portions common to those in the heating cooking apparatus 10 according to the
aforesaid first embodiment are denoted by the same numerals, and the overlapping description
is omitted.
[0041] In the partition plate 26, similarly to the partition plate 22 in the aforesaid first
embodiment, an intake ventilation hole 22a and an air flow ventilation hole 22b are
provided. As material forming the partition plate 26, which is different from the
material forming the cylindrical portion 31, material which is good in endothermic
efficiency, heat storage efficiency, and radiation efficiency can be used, for example,
aluminum plating material, a steel plate having ceramic-based coating iron or manganese
with thickness of about 25 µm, or material having coating in which industrial diamonds
are included in order to increase thermal conductivity.
[0042] As described above, in the heating cooking apparatus 10B according to the second
embodiment of the present invention, the operational advantage in the aforesaid first
embodiment is obtained. Further, since the partition plate 26 which forms a boundary
between the heat source chamber 30 and the heating chamber 20 is formed of the material
which is different from the material of the cylindrical portion 21 and high in endothermic
efficiency, heat storage efficiency, and radiation efficiency, the heat from the electric
heater 31 is stored in the partition plate 26, and next the heat is radiated from
the partition plate 26, with the result that the partition plate 26 heats the air
in the heat source chamber 30 as a second heat source. Therefore, when the hot air
of which the temperature has been raised by the electric heater 31 in the heat source
chamber 30 is sent into the heating chamber 20 by the circulating fan 32 to perform
heat-cooking, the time for which the temperature of the air in the heat source chamber
30 is raised can be reduced. Further, since the time necessary to raise the temperature
is reduced, power saving can be realized.
(Third embodiment)
[0043] Next, a heating cooking apparatus according to a third embodiment of the present
invention will be described.
As shown in Fig. 9, this heating cooking apparatus 10C is formed by a cylindrical
portion 21 and a partition plate 27. The heating cooking apparatus 10C includes a
heating chamber 20 which can accommodate a subject to be heated, for example, meat
M therein; and a heat source chamber 30 which is adjacent to the heating chamber 20
through the partition plate 27, and accommodates therein an electric heater 31 that
is a heat source, and a circulating fan 32 which circulates heat supplied from this
electric heater 31. On a side surface on the heat source chamber 30 side of the partition
plate 27, rough surface 27a is formed. The portions common to those in the heating
cooking apparatus 10 according to the aforesaid first embodiment are denoted by the
same numerals, and the overlapping description is omitted.
[0044] In the partition plate 27, similarly to the partition plate 22 in the aforesaid first
embodiment, an intake ventilation hole 22a and an air flow ventilation hole 22b are
provided. The rough surface 27a formed on the side surface on the heat source chamber
30 side of the partition plate 27 can be provided by, for example, the sandblast processing.
[0045] As described above, in the heating cooking apparatus 10C according to the third embodiment
of the present invention, the operational advantage in the aforesaid first embodiment
is obtained. Further, since the rough surface 27a are provided on the side surface
on the heat source chamber 30 side of the partition plate 27 which forms a boundary
between the heat source chamber 30 and the heating chamber 20 thereby to increase
the surface area of the partition plate 27, endothermic efficiency, heat storage efficiency,
and radiation efficiency of the partition plate 27 can be heightened. Accordingly,
the heat from the electric heater 31 is stored in the partition plate 27, and next
the heat is radiated from the partition plate 27, with the result that the partition
plate 27 heats the air in the heat source chamber 30 as a second heat source. Therefore,
when hot air heated by the electric heater 31 in the heat source chamber 30 is sent
into the heating chamber 20 by the circulating fan 32 to perform heat-cooking, the
time for which the temperature of the air in the heat source chamber 30 is raised
can be reduced. Further, since the time necessary to raise the temperature is reduced,
power saving can be also realized.
(Fourth embodiment)
[0046] Next, a heating cooking apparatus according to a fourth embodiment of the present
invention will be described.
As shown in Fig. 10, this heating cooking apparatus 10D is formed by a cylindrical
portion 21 and a partition plate 28. The heating cooking apparatus 10D includes a
heating chamber 20 which can accommodate a subject to be heated, for example, meat
M therein; and a heat source chamber 30 which is adjacent to the heating chamber 20
through the partition plate 28 and accommodates therein an electric heater 31 that
is a heat source, and a circulating fan 32 which circulates heat supplied from this
electric heater 31. On a side surface on the heat source chamber 30 side of the partition
plate 28, a metal layer 28a is formed. The portions common to those in the heating
cooking apparatus 10 according to the aforesaid first embodiment are denoted by the
same numerals, and the overlapping description is omitted.
[0047] In the partition plate 28, similarly to the partition plate 22 in the aforesaid first
embodiment, an intake ventilation hole 22a and an air flow ventilation hole 22b are
provided. Further, the metal layer 28a can be provided by superimposing and joining
another metal plate onto the partition plate 28 by, for example, riveting. Further,
both ventilation holes 22a and 22b are provided also for the metal layer 28a in the
same positions and in the same shape as the partition plate 28.
[0048] As described above, in the heating cooking apparatus 10D according to the fourth
embodiment of the present invention, the operational advantage in the aforesaid first
embodiment is obtained. Further, since the metal layer 28a is provided on the side
surface on the heat source chamber 30 side of the partition plate 28 which forms a
boundary between the heat source chamber 30 and the heating chamber 20, endothermic
efficiency, heat storage efficiency, and radiation efficiency of the partition plate
28 can be heightened.
Accordingly, the heat supplied from the electric heater 31 which is the heat source
is stored in the partition plate 28 and the metal layer 28a, and next the heat is
radiated from the partition plate 28 and the metal layer 28a, with the result that
the partition plate 28 and the metal layer 28a heat the air in the heat source chamber
30 as second heat sources. Therefore, when hot air heated by the electric heater 31
in the heat source chamber 30 is sent into the heating chamber 20 by the circulating
fan 32 to perform heat-cooking, the time for which the temperature of the air in the
heat source chamber 30 is raised can be reduced. Further, since the time necessary
to raise the temperature is reduced, power saving can be also realized.
[0049] The heating cooking apparatus according to the present invention is not limited to
the aforesaid embodiments, but modification and improvement can be appropriately made.
Industrial Applicability
[0051] As described above, in the heating cooking apparatus according to the present invention,
since the distance between the heat source formed in the spiral shape in order to
heat the air in the heat source chamber and the circulating fan is made close, the
ventilation efficiency can be improved. Therefore, the heating cooking apparatus has
advantages that: when the hot air of which the temperature has been raised by the
heat source in the heat source chamber is sent into the heating chamber by the circulating
fan to perform heat-cooking, the time for raising the temperature of the air in the
heat source chamber to a predetermined temperature can be reduced, and the power saving
can be realized. Accordingly, the heating cooking apparatus is useful as a heating
cooking apparatus which heats and cooks the subject to be heated that is accommodated
into the heating chamber by means of the hot air supplied from the heat source.
[0052] Further, in the heating cooking apparatus according to the present invention, since
the side surface on the heat source chamber side of the partition plate which forms
the boundary between the heat source chamber and the heating chamber is made high
in endothermic efficiency, heat storage efficiency, and radiation efficiency, the
heat from the heat source is stored in the partition plate and the like, and next
the heat is radiated from the partition plate and the like, with the result that the
partition plate and the like heat the air in the heat source chamber as the second
heat source. Therefore, the present invention has an advantage that it is possible
to provide a heating cooking apparatus which has advantages that the time for raising
the temperature of the air in the heat source chamber can be reduced, and that the
power saving can be realized by reduction of the temperature rise time. Accordingly,
the heating cooking apparatus is useful as a heating cooking apparatus which heats
and cooks the subject to be heated that is accommodated into the heating chamber by
means of the hot air supplied from the heat source.