[0001] This invention relates to a cooking oven. Cooking ovens are normally used in the
home and in catering establishments.
[0002] Known in the prior art are gas cooking ovens comprising a compartment in which the
food to be cooked is placed.
[0003] In traditional gas ovens, the gas burner is located under the cooking compartment.
More specifically, between the burner and the cooking compartment there is a plate
with a plurality of slots in it. From the burner, heated air and combustion products
flow by convection through the slots and into the cooking compartment.
[0004] The vapours produced by cooking food are channelled through a suitable duct that
connects the cooking compartment with the outside environment.
[0005] These ovens, however, have drawbacks due mainly to the non-uniformity of the temperature
from one part of the cooking compartment to another. In particular, the temperature
is lower in the peripheral parts of the cooking compartment.
[0006] German patent
DE 816 303 C relates to a gas-heated oven comprising a gas burner located outside the cooking
compartment and in thermal contact with it, the lower base being interposed between
the burner and the cooking compartment and preventing the combustion fumes generated
by the burner from passing inside the cooking compartment.
[0007] Document
GB 2432657 discloses further state of the art relevant to the invention.
[0008] In this context, the technical purpose which forms the basis of this invention is
to propose a cooking oven that overcomes the above mentioned drawbacks of the prior
art.
[0009] In particular, this invention has for an aim to provide a cooking oven capable of
improving cooking evenness.
[0010] Another aim of the invention is to provide a cooking oven capable of improving cooking
quality.
[0011] The technical purpose and aims specified are achieved by a cooking oven comprising
the technical characteristics described in one or more of the accompanying claims.
[0012] Further characteristics and advantages of the invention are more apparent in the
non-limiting description which follows of a preferred non-exclusive embodiment of
a cooking oven illustrated in the accompanying drawings, in which:
- Figure 1 is a perspective view of the cooking oven according to this invention;
- Figure 2 is a perspective view of the oven in a section through the plane 1-1 of Figure
1 and with some parts cut away in order to better illustrate others;
- Figure 3 is an enlarged view of a detail from Figure 2;
- Figure 4 is a perspective view of the oven in a section through the plane 2-2 of Figure
1 and with some parts cut away in order to better illustrate others;
- Figure 5 is a detail of a cross section through the plane 2-2 of Figure 1, with some
parts cut away for clarity.
[0013] The reference numeral 1 in the accompanying drawings denotes an oven for cooking
food.
[0014] The oven 1 comprises a casing 2 which forms a cooking compartment 3 designed to accommodate
the food to be cooked. Advantageously, the casing 2 comprises a lower base 23 and
a ceiling 24 opposite the lower base 23. In the jargon of the trade, the term "ceiling"
is used to mean the upper portion of the casing 2 that delimits the cooking compartment
3.
[0015] The lower base 23 is located under the ceiling 24 and the cooking compartment 3.
Similarly, the ceiling 24 is located above the lower base 23 and the cooking compartment
3.
[0016] In this specification, the expressions "upper", "lower", "above" and "below" are
always used with reference to the physical vertical (determined for example by a plumb
line) and with reference to a preferred orientation in space (the one illustrated
in the drawings) of the cooking oven 1.
[0017] The casing 2 also comprises:
- a rear wall 251 extending between the lower base 23 and the ceiling 24;
- a door 21 able to move between an open configuration and a closed configuration, the
door 21 in the closed configuration being opposite the rear wall 251 (in Figure 1,
the door 21 is in the open configuration).
[0018] In the closed configuration the door 21 extends at least partly between the ceiling
24 and the lower base 23. The door 21 provides access for the user to put food inside
or take food out of the cooking compartment 3. Normally, the door 21 his hinged to
the remaining parts of the cooking oven 1.
[0019] The casing 2 also comprises two lateral walls 25 located opposite each other and
interposed between the rear wall 251 and the door 21 in the closed configuration.
The two lateral walls 25 also extend between the ceiling 24 and the lower base 23.
More specifically, the two lateral walls 25 connect the lower base 23 and the ceiling
24.
[0020] The lower base 23, the ceiling 24, the rear wall 251, the two lateral walls 25 and
the door 21 in the closed configuration delimit the cooking compartment 3 designed
to accommodate the food to be cooked. Conveniently, the casing 2 comprises the door
21 and five walls 22 that delimit the cooking compartment 3, the casing 2 approximating
a parallelepiped whose six faces correspond to the five walls 22 and the door 21 in
the closed configuration.
[0021] The five walls 22 thus coincide with the lower base 23, the ceiling 24, the rear
wall 251 and the two lateral walls 25.
[0022] Inside the casing 2 there are cooking racks, usually pull-out (not illustrated),
on which the food to be cooked can be placed.
[0023] The cooking oven 1 comprises heat generating means 40 comprising a gas burner 4 outside
the cooking compartment 3 and in thermal contact with the cooking compartment 3. Advantageously,
the lower base 23 is interposed between the burner 4 and the cooking compartment 3
and prevents the combustion fumes produced by the gas burner 3 from flowing into the
cooking compartment 4. That means the combustion fumes produced by the gas burner
4 are stopped outside the cooking compartment 3 and used to improve the evenness of
the temperature in the cooking compartment 3 (as described in more detail below).
[0024] As illustrated by way of a non-limiting example in the accompanying drawings, the
burner 4 is located under the cooking compartment 3. More specifically, the burner
4 is located at (in particular below) the lower base 23 of the casing 2.
[0025] The cooking oven 1 further comprises means 5 for expelling the combustion fumes produced
by the burner 4. The expulsion means 5 convey the combustion fumes outside the oven
1. The expulsion means 5 comprise a channel 50 which conveys the combustion fumes
generated by the gas burner 4, picking them up outside the cooking compartment 3.
The channel 50 comprises at least one predetermined portion 51 which is in thermal
contact with the cooking compartment 3 and extends at least along part of both of
the lateral walls 25 of the casing 2. Heating evenness inside the cooking compartment
3 is thus improved. Heating the two lateral walls 25 of the casing 2 is very important
because it improves heating of two opposite peripheral zones of the cooking compartment
3 and thus spreads heat more evenly inside the cooking compartment 3. That is because
the combustion fumes produced by the burner 4 are hot and, as they flow along the
channel 50 (or at least along the predetermined portion 51 of the channel 50), transfer
heat to the cooking compartment 3. Advantageously, the channel 50 does not extend
along the rear wall 251, thus making it possible to reduce the dimensions of the oven
1 in depth. If the oven 1 is of the recessed type, for example, reducing its depth
allows it to be adapted to a larger number of modular kitchen designs.
[0026] Further, at the rear wall 251 there might also be other components (heating elements,
air movement means) whose presence would condition the path followed by the channel
50, thus constituting a further design constraint. Advantageously, the channel 50
(in particular the predetermined portion 51 of the channel 50) is completely outside
the cooking compartment 3. Conveniently, the channel 50 (in particular the predetermined
portion 51 of the channel 50) surrounds the cooking compartment 3. More specifically,
there is at least one plane intersecting the two lateral walls 25 where the predetermined
portion 51 of the channel 50 surrounds the cooking compartment 3.
[0027] As shown by way of an example in Figure 2, the channel 50, at the lower base 23 and
outside the cooking compartment 3, divides into two branches 52, 53, each extending
along a respective lateral wall 25. The two branches 52, 53 reconnect at the ceiling
24 of the casing 2 (still outside the cooking compartment 3). This optimizes heat
exchange between the combustion fumes produced by the gas burner 4 and the cooking
compartment 3. The channel 50 (in particular, the predetermined portion 51 of the
channel 50) touches at least the lower base 23 and/or the ceiling 24, and/or the two
lateral walls 25 of the casing 2.
[0028] As illustrated by way of a non-limiting example in the accompanying drawings, the
channel 50 does not lead into the cooking compartment 3. This allows better cooking
quality because it means the food is not contaminated by the combustion fumes produced
by the gas burner 4.
[0029] In an alternative embodiment not illustrated, the channel 50 might lead into the
cooking compartment 3, for example at the ceiling 24. Even in an embodiment of that
kind, the channel 50 would at least partly touch the casing 2, providing additional
heat for the cooking compartment 3. The cooking vapours produced by the cooking food
and the combustion fumes generated by the gas burner 4 might then be expelled from
the inside of the cooking compartment 3 by a single conduit.
[0030] Generally speaking, the channel 50 (in particular the predetermined portion 51 of
the channel 50) extends immediately downstream of the gas burner 4 relative to the
direction of outflow of the combustion fumes produced by the gas burner 4.
[0031] Preferably, the predetermined portion 51 of the channel 50 extends along at least
part of the two lateral walls 25 and/or along the ceiling 24 and/or along the lower
base 23.
[0032] The channel 50 is almost completely in contact at least with the two lateral walls
25 and/or the ceiling 24 of the casing 2 and/or the lower base 23 of the casing 2.
[0033] The predetermined portion 51 of the channel 50 is almost completely in contact at
least with the two lateral walls 25 and/or the ceiling 24 of the casing 2 and/or the
lower base 23 of the casing 2.
[0034] The oven 1 comprises an outer case 6 which in conjunction with the casing 2 forms
a hollow space 60 between the casing 2 and the outer case 6.
[0035] Although it touches the casing 2, the hollow space 60 is sealed, in that there is
no direct fluid communication between the hollow space 60 and the adjacent cooking
compartment 3. During operation, the channel 50 and the cooking compartment 3 are
thus fluid-dynamically isolated from each other. In particular, at the front of the
oven 1, the hollow space 60 is delimited by a front frame which abuts the door 21
when the latter is in the closed configuration. In the same way, at the rear wall
251, there is a second frame that delimits the hollow space preventing the combustion
fumes produced by the burner 4 to come into contact with the rear wall 251. Advantageously,
the hollow space 60 surrounds the cooking compartment 3. The hollow space 60 forms
part of the predetermined portion 51 of the channel 50 and is designed to allow the
passage of the combustion fumes produced by the gas burner 4.
[0036] Advantageously, the outer case 6 at least partially houses the casing 2. Preferably,
the outer case 6 encompasses the casing 2.
[0037] The outer case 6 at least partly encompasses the two lateral walls 25 of the casing
2. Preferably the outer case 6 also at least partly encompasses the ceiling 24 and/or
the lower base 23 of the casing 2.
[0038] Preferably the outer case 6 almost totally partly encompasses the ceiling 24 and/or
the lower base 23 and/or the two lateral walls 25 of the casing 2.
[0039] Advantageously, the outer case 6 comprises a window 61 where the gas burner 4 is
housed. Advantageously, the window 6 is formed under the casing 2. Advantageously,
the window 6 faces the lower base 23 of the casing 2.
[0040] Advantageously, there is a thermally insulating lining between the outer case 6 and
the outside of the oven 1.
[0041] The burner 4 is preferably of the flame retention type such as, for example, a ceramic
or metal fibre burner. Advantageously, the oven 1 comprises means for generating a
spark to ignite the gas flowing out of the burner 4. The spark generating means comprise
a spark plug, for example. In another embodiment, there might be a known ionization
ignition system instead of the spark plug.
[0042] Advantageously, the oven 1 comprises a flame detector located at the burner 4. The
operation of the flame detector is linked to the detection of a temperature higher
or lower than a preset limit temperature. For example, the flame detector might be
a thermocouple. This is important for safety reasons. In effect, the oven 1 may comprise
a system for stopping the flow of gas through the burner 4 if the flame is not ignited
or if the temperature detected by the flame detector is lower than the preset limit
temperature (a situation which might occur if the flame goes out accidentally). The
stop system comprises a shutoff valve which interrupts the gas flow along the feed
pipe that conveys the gas to the burner 4, the valve being operatively connected to
the thermocouple.
[0043] Advantageously, the oven 1 comprises means 10 for supplying secondary air to the
burner 4. The secondary air allows the combustion of the gas-air mixture flowing out
of the burner 4 to be completed. The secondary air is drawn in from outside the oven
1 by the secondary air supply means 10. The secondary air supply means 10 comprise
at least one outlet section 11 formed at the burner 4 and advantageously directed
at the burner 4. Advantageously, the air supply means 10 comprise a plurality of outlet
sections 11 formed at the burner 4 and directed at the burner 4. Advantageously, the
outlet sections 11 at least partly surround the burner 4. Advantageously, the outlet
sections 11 of the secondary air supply means 10 completely surround the burner 4.
[0044] More specifically, the outer case 6 comprises a border 62 which at least partly surrounds
the window 61 and which houses the burner 4. An opening 12 formed along the border
62 is associated with at least one outlet section 11 directed at the burner 4 and
forms part of the secondary air supply means 10. A deflector 13 formed downstream
of the opening 12 (relative to the flow of secondary air) diverts the secondary air
flowing through the opening 12, an outlet 110 of the deflector 13 forming part of
the outlet section 11 of the secondary air supply means 10. Advantageously, each outlet
section 11 directed at the burner 4 has associated with it a respective opening 12
which is in turn associated with a respective deflector 13 that diverts the secondary
air flowing towards the burner 4.
[0045] The outer case 6 comprises a duct 63 for extracting the combustion fumes from the
hollow space 60. Advantageously, the duct 63 is located at (advantageously above)
the ceiling 24 of the casing 2. This solution is particularly convenient because the
hot combustion fumes tend to rise spontaneously (see arrows along the channel 50,
shown in Figure 2). The predetermined portion 51 of the channel 50 comprises or coincides
with the part of the channel 50 that extends between the gas burner 4 and the duct
63. More specifically, the predetermined portion 51 of the channel 50 comprises or
coincides with the part of the channel 50 that extends at the back of the casing 2.
[0046] Advantageously, the lower base 23 comprises a shaped element 7 of predetermined width
providing a thermal flywheel effect for the cooking compartment 3. Advantageously,
the shaped element 7 is more than 5 millimetres thick so as to obtain a good thermal
flywheel effect. In effect, the burner 4 is located at the lower base 23. The shaped
element 7 might be a plate 70 (for example, the shaped element 7 or plate 70 might
be made of steel, enamelled cast iron or cooking stone). Conveniently, the food or
food containers might be placed directly on the plate 70.
[0047] The lower base 23 may comprise a shaped element 7 which is at least partly transparent,
allowing the gas burner 4 to cook by irradiation the food placed in the cooking compartment
3. The shaped element 7 is located at the burner 4. More specifically, the shaped
element 7 faces the burner 4. The shaped element 7 might comprise or coincide with
a plate 70 (for example, the plate 70 might be made of glass-ceramic material). Advantageously,
the shaped element 7 that provides the thermal flywheel effect may comprise or coincide
with the shaped element 7 that is at least partly transparent. Advantageously, the
plate 70 forming part of the shaped element 7 that provides the thermal flywheel effect
comprises or coincides with the plate 70 forming part of the shaped element 7 that
is at least partly transparent. In the rest of this specification below, the properties
attributed to the shaped element 7 are understood to apply both to the shaped element
7 that is at least partly transparent and to the shaped element 7 that has the thermal
flywheel effect (considering that the two may coincide).
[0048] The shaped element 7 occupies at least half of the surface of the lower base 23 of
the casing 2.
[0049] The channel 50 (in particular the predetermined portion 51 of the channel 50) is
in thermal contact with the shaped element 7. In particular, the combustion fumes
come into direct contact with the surface of the shaped element 7 outside the cooking
compartment 3. More specifically, the shaped element 7 is located at the gas burner
4.
[0050] The heat generating means 40 may comprise heating elements 41 built into the cooking
compartment 3. In the preferred embodiment, the heating elements 41 may be of the
electrical type. In particular, they comprise an electrical resistor 42 located at
the ceiling 24 and/or a circular resistor 43 located at the rear wall 251. Advantageously,
the circular resistor 43 surrounds the delivery section of a fan 44 that rotates about
a horizontal axis and is located at the rear wall 251. The essential purpose of the
fan 44 is to improve air movement inside the cooking compartment 3, improving thermal
uniformity and speeding up the cooking process.
[0051] Forced movement of the air inside the cooking compartment 3 might, however, be unnecessary
thanks to heating of the two lateral walls 25 by the channel 50. The presence of the
fan 44 is nevertheless advantageous to optimize temperature evenness in the cooking
compartment 3, especially in the zone adjacent to the door 21 (for obvious reasons,
the door 21 would not be the most convenient part for the passage of the channel 50).
Furthermore, the fan 44 also makes the temperature more uniform throughout the cooking
compartment 3 when the gas burner 4 is not being used.
[0052] Replacing the gas burner 4 with an electrical element capable of generating the same
amount of heat would have the drawbacks due to the fact that the electrical power
available in private homes is normally limited (usually to 3 kW). The gas supply,
on the other hand, is independent of household electricity use and thus allows more
power to be made available for cooking.
[0053] The oven 1 also comprises an electronic control system which allows the heat generating
means 40 to be switched on and off (and, if necessary, adjusted) in order to maintain
preset operating conditions. The preset operating conditions might consist in keeping
a predetermined temperature in the cooking compartment 3 or creating in the cooking
compartment 3 a predetermined temperature profile over time. In addition to the gas
burner 4, the control system might also control another component of the heat generating
means 40 (for example, the above mentioned circular resistor 43 or first resistor
42). The preset operating conditions might be set manually by the user through an
interface forming part of the oven 1. For example, the user might select the cooking
temperature required in the cooking compartment 3 of the oven 1. In one particular
embodiment, the user can select the type of food to be cooked from a predetermined
list. Each food item in the list is associated with specific instructions controlling
the switching on and off or adjustment of the heat generating means 40.
[0054] The oven 1 further comprises a section 92 for outfeed to the outside environment
of the combustion fumes produced by the gas burner 4 and the vapours generated inside
the cooking compartment 3 during cooking of the food.
[0055] The oven 1 also comprises a duct 8 for extracting from the cooking compartment 3
the vapours generated during cooking of the food.
[0056] The channel 50 and the extraction duct 8 are in fluid communication with the outfeed
section 92, allowing the discharge of the cooking vapours and combustion fumes.
[0057] Advantageously, the oven 1 comprises a cooling duct 90 through which air is drawn
in from the environment outside the oven 1 in order to cool the components inside
the oven 1 (in particular the electronic components of the oven 1). The duct 90 passes
near the electronic components and thus dissipates the heat generated by the electronic
components so as to keep them below the temperature threshold below which they can
operate correctly.
[0058] The oven 1 also comprises air movement means 9 operatively associated with the cooling
duct 90. The air movement means 9 advantageously comprise a tangential fan 91. In
particular, the air movement means 9 are located along the cooling duct 90. Advantageously,
the duct 8 for extracting the cooking vapours from the cooking compartment 3 puts
the cooking compartment 3 in fluid communication with the cooling duct 90. Conveniently,
the channel 50 of the combustion fume extraction means 5 puts the burner 4 in fluid
communication with the cooling duct 90.
[0059] The section 92 for outfeed to the outside environment of the vapours produced during
cooking and of the combustion fumes produced by the gas burner coincides with the
section 92 for outfeed to the outside environment of the cooling duct 90. The common
outfeed section 92 is located above the door 21 when the latter is in the closed configuration.
[0060] The cooking vapour extraction duct 8 leads into the cooling duct 90 upstream of the
mechanical movement means 9 relative to the outflow direction imparted by the mechanical
movement means 9 to the air in the cooling duct 90. The channel 50 leads into the
cooling duct 90 downstream of the mechanical movement means 9 relative to the outflow
direction imparted by the mechanical movement means 9 to the air in the cooling duct
90 (see Figure 5).
[0061] The mechanical movement means 9 create a negative pressure in the cooking compartment
3 causing the cooking vapours to be extracted through the duct 8. Advantageously,
the mechanical movement means 9 are located along the duct 8 and are crossed by the
cooking vapours extracted from the cooking compartment 3. Advantageously, the passage
of the gaseous fluid moved by the mechanical movement means 9 at the connection zone
between the cooling duct 90 and the channel 50 may create a negative pressure (for
example by the Venturi effect) in the channel 50, this negative pressure attracting
the combustion fumes from the channel 50.
[0062] Generally speaking, during use, the operation of a preferred embodiment of the oven
1 (for example, the one illustrated) is described below.
[0063] The food is cooked both by the contribution of the heating elements 41 inside the
cooking compartment 3 and by the contribution linked to the action of the burner 4
outside the cooking compartment.
[0064] This invention is connected mainly with the contribution provided by the gas burner
4.
[0065] Conveniently, the gas burner 4 is located under the casing 2 and thus the combustion
fumes tend to rise and come into contact with the casing 2. In particular, the hot
combustion fumes are channelled through the hollow space 60 which is outside, and
in thermal contact with, the casing 2. Advantageously, the hollow space 60 is in direct
contact with the casing 2 but is sealed in that it is not in direct fluid communication
with the cooking fumes in the cooking compartment 3. The cooking fumes are then extracted
from the hollow space 60 through a suitable duct 63 located above the casing 2.
[0066] This invention has important advantages. First of all, it improves heat distribution
in the cooking compartment 3.
[0067] Other advantages are due to the optimization of the energy provided by the gas burner
4 (for example, through the shaped element 7 that may provide a thermal flywheel effect
and allow the food to be cooked by irradiation). Another important advantage is due
to the increase in the available cooking power, said increase being independent of
normal household electricity use. Yet another advantage is that the casing 2 can serve
as a heat sink for dissipating the heat generated by the combustion fumes produced
by the burner 4 and flowing through the channel 50. In effect, the combustion fumes
heat the cooking compartment 3 by transferring heat and it is not therefore necessary
to install a special heat sink to dissipate the heat of the combustion fumes.
[0068] It shall be understood that the invention described may be modified and adapted in
several ways without departing from the scope of the appended claims. Moreover, all
the details of the invention may be substituted by other technically equivalent elements.
In practice, all the materials used, as well as the dimensions, may be changed to
meet specific needs.
1. An oven for cooking food comprising a casing (2) which in turn comprises:
- a lower base (23);
- a ceiling (24) opposite the lower base (23);
- a rear wall (251) extending between the lower base (23) and the ceiling (24);
- a door (21) able to move between an open configuration and a closed configuration,
the door (21) in the closed configuration being opposite the rear wall (251);
- two lateral walls (25) positioned opposite each other, said two lateral walls (25)
being interposed between both the rear wall (251) and the door (21) in the closed
configuration, and between the lower base (23) and the ceiling (24); the lower base
(23), the ceiling (24), the rear wall (251), the two lateral walls (25), the door
(21) in the closed configuration delimiting a cooking compartment (3) designed to
accommodate the food to be cooked;
the oven comprising:
i) a gas burner (4) located outside the cooking compartment (3) and in thermal contact
with the cooking compartment (3), the lower base (23) being interposed between the
burner (4) and the cooking compartment (3) and preventing the combustion fumes generated
by the gas burner (4) from passing inside the cooking compartment (3);
ii) means (5) for expelling the combustion fumes generated by the burner (4), the
expulsion means (5) comprising a channel (50) which conveys the combustion fumes generated
by the gas burner (4), picking them up outside the cooking compartment (3), the channel
(50), that does not lead into the cooking compartment (3), comprising at least one
predetermined portion (51) which is in thermal contact with the cooking compartment
(3) and extends at least along part of both of the lateral walls (25) thus improving
the evenness of cooking compartment (3) heating;
iii) a duct (8) for extracting from the cooking compartment (3) the vapours generated
during cooking of the food;
iv) a section (92) for outfeed to the outside environment of the combustion fumes
generated by the gas burner (4) and the vapours generated during cooking of the food;
the channel (50) and the extraction duct (8) being in fluid communication with the
section (92) for outfeed into the outside environment, allowing the discharge of the
vapours generated by cooking and the combustion fumes; the oven being characterized in that it comprises :
- a cooling duct (90) through which air is drawn in from the environment outside the
oven (1) in order to cool the components of the oven (1);
- air movements means (9) operatively associated with the cooling duct (90) and located
along the cooling duct (90);
- the section (92) for outfeed to the outside environment of the combustion fumes
generated by the gas burner (4) and the vapours generated during cooking of the food
coincides with the section (92) for outfeed to the outside environment of the cooling
duct (90);
- the duct (8) leads into the cooling duct (90) upstream of the air movement means
(9) relative to the outflow direction imparted by air movements means (9) to the air
in the cooling duct (90);
- the channel (50) leads into the cooling duct (90) downstream of the air movement
means (9) relative to the outflow direction imparted by air movements means to the
air in the cooling duct (90).
2. The oven according to claim 1, characterised in that the channel (50) is completely outside the cooking compartment (3).
3. The oven according to claim 1 or 2, characterised in that the channel (50) surrounds the cooking compartment (3).
4. The oven according to any of the foregoing claims, characterised in that the channel (50) extends immediately downstream of the gas burner (4) relative to
the direction of outflow of the combustion fumes generated by the gas burner (4).
5. The oven according to any of the foregoing claims, characterised in that the predetermined portion (51) of the channel (50) is almost completely in contact
with at least the lateral walls (25) and/or the ceiling (24) and/or the lower base
(23) of the casing (2).
6. The oven according to any of the foregoing claims, characterised in that it comprises an outer case (6) which in conjunction with the casing (2) forms a hollow
space (60) between the casing (2) and the outer case (6), the hollow space (60) being
part of the predetermined portion (51) of the channel (50) and being designed to allow
the passage of the combustion fumes generated by the gas burner (4).
7. The oven according to claim 6, characterised in that the outer case (6) at least partly houses the casing (2).
8. The oven according to any of the foregoing claims, characterised in that the burner (4) is made at the lower base (23), said lower base (23) comprising a
shaped element (7) which is at least partly transparent, allowing the gas burner (4)
to cook by irradiation the food placed in the cooking compartment (3).
1. Ofen zum Kochen von Nahrungsmitteln, umfassend ein Gehäuse (2), welches wiederum umfasst:
- eine untere Basis (23);
- eine Decke (24) gegenüber der unteren Basis (23);
- eine hintere Wand (251), welche sich zwischen der unteren Basis (23) und der Decke
(24) erstreckt;
- eine Tür (21), welche in der Lage ist, sich zwischen einer offenen Konfiguration
und einer geschlossenen Konfiguration zu bewegen, wobei sich die Tür (21) in der geschlossenen
Konfiguration gegenüber der hinteren Wand (251) befindet;
- zwei seitliche Wände (25), welche einander gegenüber positioniert sind, wobei die
beiden seitlichen Wände (25) in der geschlossenen Konfiguration sowohl zwischen der
hinteren Wand (251) und der Tür (21) als auch zwischen der unteren Basis (23) und
der Decke (24) eingefügt sind; wobei die untere Basis (23), die Decke (24), die hintere
Wand (251), die beiden seitlichen Wände (25), die Tür (21) in der geschlossenen Konfiguration
eine Kochkammer (3) begrenzen, welche dazu eingerichtet ist, die zu kochenden Nahrungsmittel
aufzunehmen;
wobei der Ofen umfasst:
i) einen Gasbrenner (4), welcher außerhalb der Kochkammer (3) und in thermischem Kontakt
mit der Kochkammer (3) angeordnet ist, wobei die untere Basis (23) zwischen den Brenner
(4) und die Kochkammer (3) eingefügt ist und verhindert, dass die von dem Gasbrenner
(4) erzeugten Verbrennungsgase in die Kochkammer (3) eintreten;
ii) Mittel (5) zum Abgeben der von dem Brenner (4) erzeugten Verbrennungsgase, wobei
die Abgabemittel (5) einen Kanal (50) umfassen, welcher die von dem Gasbrenner (4)
erzeugten Verbrennungsgase leitet, wobei sie außerhalb der Kochkammer (3) aufgenommen
werden, wobei der nicht in die Kochkammer (3) führende Kanal (50) wenigstens einen
vorbestimmten Abschnitt (51) umfasst, welcher in thermischem Kontakt mit der Kochkammer
(3) ist und sich wenigstens entlang eines Teils der beiden seitlichen Wänden (25)
erstreckt, wodurch die Gleichmäßigkeit eines Heizens der Kochkammer (3) verbessert
wird;
iii) eine Leitung (8) zum Ausführen der während eines Kochens der Nahrungsmittel erzeugten
Dämpfe aus der Kochkammer (3);
iv) einen Abschnitt (92) zum Ausstoßen der von dem Gasbrenner (4) erzeugten Verbrennungsgase
und der während des Kochens der Nahrungsmittel erzeugten Dämpfe zu der Außenumgebung;
wobei der Kanal (50) und die Ausführleitung (8) in Fluidverbindung mit dem Abschnitt
(92) zum Ausstoßen in die Außenumgebung sind, was die Abgabe der durch das Kochen
erzeugten Dämpfe und der Verbrennungsgase erlaubt;
wobei der Ofen
dadurch gekennzeichnet ist, dass er umfasst:
- eine Kühlleitung (90), durch welche Luft von der Umgebung außerhalb des Ofens (1)
eingesaugt wird, um die Komponenten des Ofens (1) zu kühlen;
- Luftbewegungsmittel (9), welche der Kühlleitung (90) betriebsmäßig zugeordnet und
entlang der Kühlleitung (90) angeordnet sind;
- wobei der Abschnitt (92) zum Ausstoßen der von dem Gasbrenner (4) erzeugten Verbrennungsgase
und der während des Kochens der Nahrungsmittel erzeugten Dämpfe zu der Außenumgebung
mit dem Abschnitt (92) zum Ausstoßen zu der Außenumgebung der Kühlleitung (90) zusammenfällt;
- wobei die Leitung (8) stromaufwärts von den Luftbewegungsmitteln (9) bezüglich der
Ausströmrichtung, welche der Luft in der Kühlleitung (90) von den Luftbewegungsmitteln
(9) auferlegt wird, in die Kühlleitung (90) führt;
- der Kanal (50) stromabwärts von den Luftbewegungsmitteln (9) bezüglich der Ausströmrichtung,
welche der Luft in der Kühlleitung (90) von den Luftbewegungsmitteln auferlegt wird,
in die Kühlleitung (90) führt.
2. Ofen nach Anspruch 1, dadurch gekennzeichnet, dass der Kanal (50) komplett außerhalb der Kochkammer (3) liegt.
3. Ofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kanal (50) die Kochkammer (3) umgibt.
4. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kanal (50) sich unmittelbar stromabwärts des Gasbrenners (4) bezüglich der Ausströmrichtung
der von dem Gasbrenner (4) erzeugten Verbrennungsgase erstreckt.
5. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der vorbestimmte Abschnitt (51) des Kanals (50) beinahe komplett mit wenigstens den
seitlichen Wänden (25) oder/und der Decke (24) oder/und der unteren Basis (23) des
Gehäuses (2) in Kontakt ist.
6. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass er ein äußeres Gehäuse (6) umfasst, welches in Zusammenwirkung mit dem Gehäuse (2)
einen Hohlraum (60) zwischen dem Gehäuse (2) und dem äußeren Gehäuse (6) bildet, wobei
der Hohlraum (60) ein Teil des vorbestimmten Abschnitts (51) des Kanals (50) ist und
dazu eingerichtet ist, den Durchgang der von dem Gasbrenner (4) erzeugten Verbrennungsgase
zu erlauben.
7. Ofen nach Anspruch 6, dadurch gekennzeichnet, dass das äußere Gehäuse (6) wenigstens teilweise das Gehäuse (2) beherbergt.
8. Ofen nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Brenner (4) an der unteren Basis (23) gefertigt ist, wobei die untere Basis (23)
ein geformtes Element (7) umfasst, welches wenigstens teilweise transparent ist, was
es dem Gasbrenner (4) erlaubt, durch Bestrahlen der in der Kochkammer (3) platzierten
Nahrungsmittel zu kochen.
1. Four pour cuire de la nourriture, comportant un caisson (2) qui, à son tour, comprend
:
- une base inférieure (23) ;
- un plafond (24) opposé à la base inférieure (23) ;
- une paroi arrière (251) s'étendant entre la base inférieure (23) et le plafond (24)
;
- une porte (21) pouvant se déplacer entre une configuration ouverte et une configuration
fermée, la porte (21) se trouvant, dans la configuration fermée, opposée à la paroi
arrière (251) ;
- deux parois latérales (25) positionnées à l'opposé l'une de l'autre, les deux dites
parois latérales (25) étant interposées entre à la fois la paroi arrière (25) et la
porte (21) dans la configuration fermée, et entre la base inférieure (23) et le plafond
(24) ; la base inférieure (23), le plafond (24), la paroi arrière (251), les deux
parois latérales (25), la porte (21) dans la configuration fermée délimitant un compartiment
de cuisson conçu pour recevoir la nourriture à cuire ;
le four comportant :
i) un brûleur à gaz (4) placé à l'extérieur du compartiment de cuisson (3) et en contact
thermique avec le compartiment de cuisson (3), la base inférieure (23) étant interposée
entre le brûleur (4) et le compartiment de cuisson (3) et empêchant les fumées de
combustion produites par le brûleur à gaz (4) de passer à l'intérieur du compartiment
de cuisson (3) ;
ii) des moyens (5) pour expulser les fumées de combustion produites par le brûleur
(4), les moyens d'expulsion (5) comportant une conduite (50) qui achemine les fumées
de combustion produites par le brûleur à gaz (4), les recueillant à l'extérieur du
compartiment de cuisson, (3), la conduite (50), qui ne conduit pas dans le compartiment
de cuisson (3), comprenant au moins une partie prédéterminée (51), laquelle se trouve
en contact thermique avec le compartiment de cuisson (3) et s'étend au moins le long
d'une partie des deux parois latérales (25), améliorant ainsi l'uniformité de chauffage
du compartiment de cuisson (3) ;
iii) un conduit (8) pour extraire du compartiment de cuisson (3) les vapeurs générées
pendant la cuisson de la nourriture ;
iv) une section (92) pour évacuer vers l'environnement extérieur des fumées de combustion
produites par le brûleur à gaz (4) et les vapeurs générées pendant la cuisson de la
nourriture ; la conduite (50) et le conduit d'extraction (8) étant en communication
fluidique avec la section (92) pour une évacuation dans l'environnement extérieur,
permettant le rejet des vapeurs générées par la cuisson et des fumées de combustion
;
le four étant
caractérisé en ce qu'il comporte :
- un conduit de refroidissement (90) à travers lequel de l'air est entraîné depuis
l'environnement extérieur au four (1) dans le but de refroidir les composants du four
(1) ;
- des moyens de déplacement de l'air (9) associés fonctionnellement au conduit de
refroidissement (90) et placés le long du conduit de refroidissement (90) ;
- la section (92) pour l'évacuation vers l'environnement extérieur des fumées de combustion
produites par le brûleur à gaz (4) et les vapeurs générées pendant la cuisson de la
nourriture coïncide avec la section (92) permettant l'évacuation vers l'environnement
extérieur du conduit de refroidissement (90) ;
- le conduit (8) aboutit dans le conduit de refroidissement (90) en amont des moyens
de déplacement de l'air (9) par rapport à la direction d'écoulement communiquée à
l'air par les moyens de déplacement de l'air (9) dans le conduit de refroidissement
(90) ;
- la conduite (50) aboutit dans le conduit de refroidissement (90) en aval des moyens
de déplacement de l'air (9) par rapport à la direction d'écoulement communiquée à
l'air par les moyens de déplacement de l'air dans le conduit de refroidissement (90).
2. Four selon la revendication 1, caractérisé en ce que la conduite (50) se trouve entièrement à l'extérieur du compartiment de cuisson (3).
3. Four selon la revendication 1 ou 2, caractérisé en ce que la conduite (50) entoure le compartiment de cuisson (3).
4. Four selon l'une quelconque des revendications précédentes, caractérisé en ce que la conduite (50) s'étend immédiatement en aval du brûleur à gaz (4) par rapport à
la direction d'écoulement des fumées de combustion produites par le brûleur à gaz
(4).
5. Four selon l'une quelconque des revendications précédentes, caractérisé en ce que la partie prédéterminée (51) de la conduite (50) se trouve presque totalement en
contact avec au moins les parois latérales (25) et/ou le plafond (24) et/ou la base
inférieure (23) du caisson (2).
6. Four selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une enceinte extérieure (6), laquelle en liaison avec le caisson (2) forme
un espace creux (60) entre le caisson (2) et l'enceinte extérieure (6), l'espace creux
(60) faisant partie de la partie prédéterminée (51) de la conduite (50) et étant conçu
pour permettre le passage des fumées de combustion produites par le brûleur à gaz
(4) .
7. Four selon la revendication 6, caractérisé en ce que l'enceinte extérieure (6) loge au moins partiellement le caisson (2).
8. Four selon l'une quelconque des revendications précédentes, caractérisé en ce que le brûleur (4) est réalisé au niveau de la base inférieure (23), ladite base inférieure
(23) comprenant un élément configuré (7), lequel est, au moins partiellement, transparent,
ce qui permet au brûleur à gaz (4) de cuire par rayonnement la nourriture placée dans
le compartiment de cuisson (3).