JP2000146192A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance highly efficient cooling of a part and heat insulation performance of a heating chamber in an energy saving heating cooker. SOLUTION: A cooling system by cooling air 11 and a heat insulation system by a heat insulation member 9 are completely separated by a partition plate 20, and because a part to be cooled is sufficiently cooled and heat insulation to outside of a heating chamber 100 is surely performed by employing a null power consumption cooling by the cooling system utilizing a stack effect and a highly efficient heat insulation by the heat insulation system utilizing an air layer, a high performance energy saving heating cooker is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy-saving cooker that efficiently cools a component to be cooled and has a high heat insulating effect in a heating chamber, such as a microwave oven, an electronic oven, and an electronic microwave oven.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 7-63349 discloses a conventional technique for cooling a component to be cooled and increasing the temperature of a heating chamber of a heating cooker by utilizing the heat insulating effect. The heating cooker described in (1) above, in heating cooking (oven cooking) by a heater, in order to sufficiently raise the internal temperature of the inside of the heating chamber and to sufficiently cool the parts to be cooled such as the machine room, A partition plate is provided for rotating the provided cooling fan at a low speed and for preventing cooling air generated by the rotation of the fan from entering the sensor chamber (left side of the main body).

Here, an example of the structure of a conventional heating cooker (electronic oven range) will be described in detail with reference to an external perspective view of FIG. 10 and a sectional view seen from the front of FIG. The heating chamber 100 in which the object to be heated is cooked
And an outer box 2 (cabinet) that covers the periphery of the inner box 1 and a door 3 that is located on the front and has a transparent window through which the heating chamber 100 can be observed. As shown, upper and lower heaters 101 and 102, a rotating plate 103, and the like are provided. Here, in the inner box 1, the ceiling surface is a, the bottom surface is b, the right side surface is c, the left side surface is d, the back surface is e, and the front surface composed of a door is f.
, Respectively, with subscripts attached to the numbers. The same applies to the outer box 2. In FIG. 10, reference numeral 4 denotes an operation panel. In FIG. 11, reference numeral 5 denotes a machine room provided on the right side surface of the inner box 1 and contains components to be cooled (components to be cooled are omitted). Reference numeral 6 denotes a weight sensor, 7 denotes an electronic oven range leg, and 8 denotes a cooling fan. Reference numeral 10 denotes a space formed by the outer surface of the inner box 1 and the inner surface of the outer box 2 opposed thereto, and a glass wool 9 is spread as a heat insulating member in a space 10a above the ceiling surface 1a. On the other hand, the bottom surface 1b and the spaces 10b to 10d on the side surfaces serve as flow paths for the cooling air 11. The large flow of the cooling air 11 flows in through the intake / exhaust holes 12b on the bottom surface, turns right through the weight sensor 6, and
The flow flowing from the space 10b through the machine room 5 (the space 10c) to the air suction / exhaust holes 12e on the back surface,
b, it turns to the left through the weight sensor 6, and flows out of the space 10a, through the space 10d, and out of the intake / exhaust hole 12d on the left side. The components to be cooled in the machine room 5 are cooled by the flow of the cooling air 11. In addition, another cooling air 11 enters and exits through the intake and exhaust holes 12 provided on each surface of the outer box 2.

[0004]

However, in the conventional configuration, the partition plate is provided at the left end of the ceiling surface and the left end of the bottom surface of the heating chamber. Cooling the surface by reaching the gap of the main body, and furthermore, a large number of air supply and exhaust holes are provided on the left side of the main body, and another cooling air flowing in from the bottom of the left side is along the left side. The upper surface, the lower surface and the left side are insulated even if the ceiling, bottom and left side are insulated. Performance is not always guaranteed. In other words, the cooling air flows in and out of the intake and exhaust holes of each part in a complicated manner, and flows everywhere to cool each part.Therefore, the insulation system and the cooling system are not sufficiently separated, leading to a configuration contrary to energy saving. Easy,
There was a problem that it was not an energy-saving heating cooker.

An object of the present invention is to provide a heating cooker that efficiently cools a component to be cooled, enhances the heat insulating effect of a heating chamber, and saves energy without interfering with each other.

[0006]

According to the present invention, there is provided a heating cooker such as an electronic microwave oven having a substantially rectangular parallelepiped inner box having a heating chamber for cooking an object to be heated. One or two of the six outer surfaces constituting the inner box in which the air for cooling the part to be cooled constitutes the inner box, namely, the ceiling surface, the bottom surface, and the front surface composed of the left side surface, the right side surface, the rear surface, the door, etc. Since only the surface flows and the other outer surfaces are insulated by the heat insulating member without flowing the cooling air, the cooling system using the cooling air and the heat insulating system using the heat insulating member are completely separated. For example, in a heating cooker provided with a machine room containing a component to be cooled on the right side of the inner box and a weight sensor for measuring the weight of the cooked product on the bottom of the inner box, the outer surface through which the cooling air flows is the inner box. , And only two sides, that is, a bottom face and a side face provided with a machine room.

In a heating cooker provided with a cooling fan, the cooling air is supplied from the bottom of the inner box to the side of the machine room from the bottom surface of the inner box by the "chimney effect" due to natural convection without operating the cooling fan during oven cooking. Conversely, a cooling fan is operated during range cooking so that cooling air flows from the side where the machine room of the inner box is provided to the bottom. did.

Further, in a heating cooker having a machine room in which a component to be cooled is built in only one of the ceiling surface and the bottom surface of the inner box, the ceiling in which the outer surface through which the cooling air flows is provided with the machine room having the inner box. Only one of the surface and the bottom was used.

An air layer can be used as a heat insulating member constituting the heat insulating system, and the thickness of the air layer can be suppressed to a gap size where convection does not occur in the air, and the air in the air layer communicates with the outside. It is in a substantially sealed state so as to be difficult to perform. Here, the reason why the thickness of the air layer is suppressed to a clearance dimension where convection does not occur in the air is as follows. The heat transfer from one of the two opposing surfaces to the other is performed in three forms: radiation, conduction, and convection. Here, radiation is almost independent of the layer thickness between the two surfaces, but conduction and convection depend on the layer thickness. In other words, when the layer thickness is thin, convection hardly occurs in the air, and heat is transmitted by conduction and radiation.However, when the layer thickness is large, the amount of heat transfer increases rapidly due to the convection of the air that has started to occur in addition to radiation and conduction. . For this reason, in order to save heat, it is necessary to suppress the amount of heat transfer in order to improve the heat insulation performance. For this purpose, it is necessary to prevent convection in the air in the layer.
The optimum layer thickness that does not cause convection is determined by the heating conditions of the two surfaces, the temperature, the type of fluid in the layer, and the like. Because the convection rises as the internal fluid is heated by the hot surface,
This is because it is caused by cooling and lowering on a low temperature surface. Here, it is not always necessary that the optimum layer thickness is thin, but it is desirable that the layer be as thick as possible without causing convection. This is because if the layer thickness is reduced, the distance over which heat is transmitted is shortened, so that the amount of heat transfer due to conduction may increase.

[0010] With the above configuration, the cooling system using the cooling air and the heat insulating system using the heat insulating member can be almost completely separated from each other without interfering with each other. Due to the heat insulating effect of the thin air layer, which is a heat insulating member, the temperature in the heating chamber can be efficiently raised, and an energy-saving heating cooker can be provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described by taking an electronic microwave oven as a cooking device as an example. In addition,
It goes without saying that the present invention can be widely applied to other heating cookers.

First, an example of the structure of an electronic microwave oven according to the present invention will be described focusing on an example of oven cooking using a heater. In the description of the conventional technology, the same reference numerals are applied to the same components.

FIG. 1 is a front sectional view of the electronic oven range, similarly to FIG. 11, and FIG. 2 is an external perspective view of the electronic oven range, similar to FIG.

The electronic oven range has a cooling air 11
And a heat insulating system by a heat insulating member 9 are separated from each other. The two systems are completely separated by a partition plate 20 extending from the bottom surface 1b to the machine room 5, and the surface through which the cooling air 11 flows is weight. The two surfaces of the bottom surface 1b provided with the sensor 6 and the right side surface 1c constituting the machine room 5 are insulated, and the surfaces to be insulated are the other surfaces of the inner box 1, that is, the ceiling surface 1a, the left side surface 1d, and the back surface. 1e and the front surface 1f.
For this reason, the supply / exhaust hole 12 is provided as the supply / exhaust hole 12b and the supply / exhaust hole 12e only in the two spaces of the space 10b and the space 10c facing the bottom surface 1b and the right side surface 1c, respectively.

The cooling air 11 is supplied to a supply / exhaust hole 12 in the bottom surface 1b.
b, cools the weight sensor 6, flows into the machine room 5 (space 10c) on the right side 1c through the space 10b, cools the component to be cooled, and flows out of the supply / exhaust hole 12e on the back of the machine room 5. I do. In FIG. 1, a supply / exhaust hole 12e corresponding to the outlet is provided.
Although located on the back side, it is provided on the back side of the machine room 5 on the right side 1c, so the air supply / exhaust hole 12e is considered as the air supply / exhaust hole 12 in the space 10c on the right side 1c.

On the other hand, the heat insulating member 9 has a surface constituting a heat insulating system,
That is, the ceiling surface 1a, the left side surface 1d, and the back surface 1e of the inner box 1
Of course, in the embodiment of FIG. 1, the heat insulating member 9 is also provided on the bottom surface 1b and the right side surface 1c constituting the cooling system. Of course, it is not necessary to provide the heat insulating member 9 on the bottom surface 1b and the right side surface 1c constituting the cooling system. However, the heat insulating performance is further improved by providing the heat insulating member 9 on the surface constituting the cooling system as in this embodiment. . However, the thickness of the heat insulating member 9 does not need to be constant on each surface.

Here, the cooling system and the heat insulating system will be supplementarily described.

FIG. 3 is an explanatory view showing only the cooling system portion in FIG. 1. The parts to be cooled include the weight sensor 6, the interior lamp 21, the other circuit board 22, and the like. Among them, the heat source is the interior light 21 and the other circuit board 22 and the like, and is a cooling method of obtaining the wind power of the cooling air 11 by using the “chimney effect” by the heat source. In other words, a heat source is provided in the chimney-shaped space 10 which is a flow path of the cooling air 11, and the wind power is generated by the ascending driving force due to the change in density of the air heated by the heat source. If no cooling means such as a fan is provided, the component to be cooled can be cooled, and a cooling system that does not require power consumption can be configured. Also,
The cooling air 11 is heated by heat generated from the interior lamp 21 and other circuit boards 22 and the like, and the cooling air 11 flows in through the supply / exhaust holes 12b on the bottom surface by the rising wind power,
After passing through the space 10b and reaching the machine room 5, the space 10c ascends as a chimney, and then flows out from the air supply / exhaust hole 12e at the upper rear portion of the machine room 5.

When the "chimney effect" is used, the larger the height of the chimney L, the more the wind power increases.
Should be as high as possible. In addition, it is desirable to install the heat source at the lower part of the chimney as much as possible. Furthermore, since it is preferable that the horizontal portion in the middle of the flow path (chimney) is as short as possible, the partition plate 20x is configured to be inclined upward to the right toward the machine room 5 as shown in the front sectional view of FIG. Is also good. By doing so, the air supply / exhaust holes 12b on the bottom surface
The cooling air 11 flowing in from above smoothly rises toward the machine room 5 along the inclination of the partition plate 20x, and the ventilation wind can be increased by reducing the ventilation resistance. Here, the shape of the supply / exhaust hole 12e may be an elongated slit-shaped opening as shown in FIG. 1 or a circular or rectangular opening as shown in FIG.

FIG. 5 shows the inner box 1 of the heat insulation system in FIG.
FIG. 5 is a partial cross-sectional view showing only the heat insulating portion of the left side surface 1d of FIG. In FIG. 1, a solid heat insulating material such as glass wool is used as the heat insulating member 9, but FIG. 5 shows an embodiment in which a thin air layer 23 is used as the heat insulating member 9. Here, the left side 1d of the inner box 1 will be described as an example.
It can be used for other surfaces of the inner box 1, for example, a ceiling surface, a back surface, a side surface, and a bottom surface. Further, the present invention can also be applied to the surface of the inner box 1 constituting the cooling system. In FIG. 5, the left side surface 1d of the inner box 1 is shown.
A thin air layer component 24 is attached to the outer surface of the inner box 1, and a relatively narrow air layer 23 is formed between the air layer component 24 and the outer surface of the left side 1d of the inner box 1. Here, the air layer constituting member 24 may be a stainless steel plate, a steel plate, an aluminum plate or the like for high temperature use, and may be a resin or the like for low temperature use. In the present invention, the gap S of the air layer 23 is suppressed to such a thickness that convection does not occur in the air inside. In the case of an electronic microwave oven, the layer thickness S of the air layer 23 is desirably 10 mm or less so that convection does not occur in the air. More preferably, 5 to 10 mm
It's about a degree and shouldn't be too thin. In addition, since the dimension value differs depending on the type of the microwave oven, cooking conditions, and the like, it is not particularly limited to the above-described dimensions. Furthermore, the air layer 2
No matter how thin the thickness is, if the air layer 23 has two or more openings through which air can easily flow, the internal air flows out from one of the openings and the surrounding air from the other opening. Flows in, and as a result, the air in the air layer 23 moves and convects. For this reason, the air layer 23 of the present invention has such a thickness that convection does not occur, and the air layer 23 is set in a substantially sealed state so that the air inside does not easily communicate with the surroundings (for example, the space 10d). ing. Here, the substantially closed state does not mean that the internal air does not communicate with the surrounding air at all, but means that a slight clearance unavoidable due to its structure is allowed. That's about it. If the amount of thermal expansion of the air in the air layer 23 is expected to be large due to the temperature change, a small opening is formed in the air layer component 24.
May be provided only in one place. In this case, since there is only one opening, air expansion and contraction due to temperature change
Although there are some ingress and egress of air through the openings, convection hardly occurs.

FIG. 6 is a partial sectional view showing another embodiment of the heat insulating system, in which the space 10d between the left side 1d of the inner box 1 and the left side 2d of the outer box 2 is relatively large. 6, the outer surface of the left side surface 1d of the inner box 1
2 are stacked and attached, and a thin two-layer air layer 23 is formed on the outer surface of the left side surface 1 d of the inner box 1. When the space 10d is wider, the number of air layers 23 may be further increased. Needless to say, the number of layers is preferably as small as possible, and the thickness of the air layer 23 is desirably as large as possible so that convection does not occur in air. This is because increasing the number of layers reduces the thickness of the layers, increases the number of air layer components 24 having a higher thermal conductivity than air, and transmits heat from the air layer 23 having a lower thermal conductivity. This is because, since the distance (thickness) is short, there is a concern that the amount of heat transfer due to conduction increases even though convection is suppressed. In addition, the thickness of the air layer 23 where convection does not occur in the air can be roughly determined by the direction (horizontal or vertical) of the surface of the inner box 1 and the temperature level, so that the size of the space 10d and the optimum air layer 23 The required number of layers may be determined from the thickness. The motion that causes convection in the air described here is what is called “Benard cell” motion.

The heat insulation by the air layer 23 described with reference to FIGS. 5 and 6 is very good unless convection occurs in the air. Therefore, it is preferable to use the heat insulation on each surface. A solid heat insulating material such as glass wool described in 1 and the air layer 23 may be used in combination. For example, in FIG. 1, even if the heat insulating member 9 is attached, an air layer may be additionally formed in the remaining space 10.
Furthermore, in the heat insulation system, in order to further improve the heat insulation performance,
A heat reflection paint or a heat insulation paint may be applied to the surface of the inner box 1 or the outer box 2 to increase the heat reflection efficiency and the heat insulation efficiency. The paint is preferably a material that is thin but has a high effect. As one of the paints having such characteristics, it can be obtained by making semiconductor oxides or the like into fine particles and dispersing them in a paint binder.

Next, an embodiment of a cooling system operation control method will be described with reference to FIG.

As described above, the components to be cooled during the oven cooking are the weight sensor 6, the interior lamp 21, the other circuit board 22, and the like, which generate a small amount of heat as a whole and utilize the "chimney effect" by the heat source. Then, the cooling air 11 is
b from the air supply / exhaust hole 12b, and the space 10b in the bottom surface 1b
To the machine room 5 and up the chimney, which is the space 10c of the right side surface 1c, and then the supply / exhaust holes 12e at the upper rear of the machine room 5
A cooling system flowing out of the cooling device is sufficient, and can cool a component to be cooled without a blowing means such as a fan, thereby achieving a cooling system with zero power consumption.

On the other hand, the parts to be cooled during the cooking range include a magnetron circuit as a large heat source in addition to the weight sensor 6, the interior lamp 21, the circuit board 22, and the like. A cooling system using only the "chimney effect" at the time of oven cooking results in insufficient cooling. For this purpose, for example, the cooling system is controlled as follows.

First, a cooling fan 8 is provided at a position indicated by a broken line in an electronic microwave oven as a heating cooker,
At the time of oven cooking, the cooling air 11 flows from the space 10b of the bottom surface 1b of the inner box 1 toward the side space 10c having the machine room 5 by the upward flow of the "chimney effect" due to natural convection without operating the cooling fan 8. Flow, then machine room 5
A cooling system that flows out of the air supply / exhaust hole 12e in the upper rear portion is configured. At the time of range cooking, by operating the cooling fan 8, the cooling air 11 flows by forced convection from the air supply / exhaust holes 12 e at the upper portion on the rear side of the machine room 5, and the space 10 c of the right side surface 1 c having the machine room 5 has 1b flows toward the space 10b, and then the air supply / exhaust hole 1 in the space 10b on the bottom surface.
A cooling system that flows out from 2b or the like is configured. That is, the flow direction of the cooling air 11 at the time of oven cooking is exactly opposite to the flow direction of the cooling air 11 at the time of range cooking. Since this configuration is provided with the cooling fan 8, the following usage is also possible. In other words, the cooling system during cooking in the oven is sufficient for the "chimney effect" due to natural convection. However, considering safety, the temperature at a point where an important part is located is detected by the temperature sensor, and the temperature becomes higher than the specified value A. In this case, the temperature is reduced by temporarily rotating the cooling fan 8. Then, when the temperature becomes lower than the specified value B (specified value A> specified value B), the cooling fan 8 is controlled to stop. In this case, a small amount of power is also required during oven cooking, but the amount can be kept to a necessary minimum by intermittent operation of the cooling fan 8.

FIG. 7 is a front sectional view of another embodiment of the present invention, in which a second cooling system is provided in addition to the main cooling system. In addition to the main cooling system of FIG. This is an embodiment in which a supply / exhaust hole 30 and a cooling air 31 constituting a cooling system of the present invention are provided. This is effective when the amount of ventilation of the main cooling system is insufficient or when it is necessary to efficiently cool specific components in the machine room 5. When cooling a specific component, it is preferable to provide a supply / exhaust hole 30 at a lower portion near the specific component. in this case,
Since the flow rate of the cooling air 11 flowing from the air supply / exhaust hole 12e at the upper rear part of the machine room 5 increases, the ventilation area of the air supply / exhaust hole 12e needs to be set wide. In the case where the second cooling system is provided as described above, the cooling air 31 is also provided in the space 10 formed by the outer surface of the inner box 1 through which the cooling air 11 flows and the inner surface of the outer box 2 opposed thereto. Inlet / outlet port 30
Is not provided. In FIG. 7, the supply / exhaust holes 30 through which the cooling air 31 enters / exits can be provided only on the two surfaces of the space 10 b and the space 10 c which is the machine room 5.

In the cooling system shown in FIG. 3, when there is no component serving as a heat source for obtaining the "chimney effect" in the machine room 5 or when the heat amount of the heat source is small, the "chimney" is performed as follows. Effect ". For example, in FIG. 1, only the heat insulating member 9 on the outer surface of the right side surface 1c of the inner box 1 is partially or entirely removed, and the heating chamber 100 and the machine chamber 5 are also thermally adjacent to each other. The heat radiation (transmission of heat) from the heating chamber 100 to the machine room 5 is locally improved,
The "chimney effect" is obtained by using the amount of heat released from the heat source as a heat source. In this case, the partition plate 20 may be made of a material having good heat conductivity. In FIG. 1, the location where the heat insulating member 9 is not provided partially or entirely may be the outer surface of the bottom surface 1b or the like.

FIGS. 8 and 9 are cross-sectional views of another embodiment of the present invention, as viewed from the side of an electronic microwave oven.
In the embodiment shown in FIGS. 1 to 7, the machine room 5 is provided on the right side surface of the microwave oven, but in the present embodiment, it is provided on the bottom surface.

In the embodiment of FIG. 8, the surface of the inner box 1 through which the cooling air 11 flows is only one surface of the bottom surface 1b, and the machine room 5 is provided on the bottom surface 1b. Here, the cooling air 11 flows in from the air supply / exhaust holes 12b at the front part of the bottom surface 1b, passes through the space 10b of the bottom surface 1b which is the machine room 5, and then flows out from the air supply / exhaust holes 12e on the back surface of the machine room 5. The length of the chimney is as short as L1, but can form a cooling system. If the length L1 of the chimney is very short, there is a concern that the "chimney effect" cannot be sufficiently expected. Therefore, the following configuration may be adopted.

The embodiment of FIG. 9 is a side sectional view of an example of the countermeasure, in which the surface of the inner box 1 through which the cooling air 11 flows is constituted by two surfaces, a bottom surface 1b and a back surface 1e. With this configuration, the length L2 of the chimney can be set longer than in FIG.
The "chimney effect" can be exhibited more effectively.
In FIG. 8, a control method using the cooling fan 8 can be used.

Here, the embodiment shown in FIGS. 8 and 9 is a case where the machine room 5 is provided on the bottom surface 10b, but the machine room 5 may be provided on the ceiling surface 10a.

In the above embodiment, as shown in the conventional example in FIG.
Two heaters 10 provided above and below the heating chamber 100
However, the embodiment of the present invention is not limited to this conventional method, and a hot air heater using forced convection by a fan and a heater, or a heater configuration attached to the side surface of the heating chamber 100 may be used. And a combination of these heater systems.

Although the microwave oven in this embodiment employs a vertically-opening door, the invention is not limited to the vertically-opening door, but may be a horizontally-opening door.

[0035]

According to the present invention, it is possible to obtain a cooling and heat insulating system in which a cooling system using cooling air and a heat insulating system using only heat insulating members through which no cooling air flows are completely separated. First, as the cooling system, the component to be cooled can be cooled by passing wind utilizing the "chimney effect" during oven cooking, so that a cooling system with zero power consumption can be configured, and the temperature rise of the component to be cooled can be reduced.

Next, as an insulating system, an air layer excellent in heat insulating performance, in which convection of air due to the "Benard cell" movement does not occur and heat transfer is extremely poor, can be installed on the wall surface of the heating cooker. It is possible to achieve a reduction in the amount of heat radiation and a reduction in the temperature level of the outer box surface due to the high heat insulating effect of the layer.

As a result, an energy-saving cooker, for example, an electronic oven, capable of efficiently cooling a component to be cooled, efficiently insulating the inner box, and keeping the heating chamber at a high temperature with low power consumption. A range can be provided.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an electronic microwave oven in which a cooling system and a heat insulating system in a heating cooker of the present invention are separated.

FIG. 2 is an external perspective view of an electronic microwave oven in which a cooling system and a heat insulating system in the heating cooker of the present invention are separated.

FIG. 3 is an explanatory diagram of a chimney effect in the cooking device of the present invention.

FIG. 4 is a front sectional view of an electronic microwave oven in which the bottom surface of the cooking device of the present invention is inclined.

FIG. 5 is a partial cross-sectional view of an electronic microwave oven having one air layer in the cooking device of the present invention.

FIG. 6 is a partial cross-sectional view of an electronic microwave oven having two air layers in the cooking device of the present invention.

FIG. 7 is a front sectional view of an electronic microwave oven having a second cooling system in the heating cooker of the present invention.

FIG. 8 is a side sectional view of an electronic microwave oven having a machine room on a bottom surface in the cooking device of the present invention.

FIG. 9 is a side sectional view of an electronic microwave oven having a machine room on a bottom surface in the cooking device of the present invention.

FIG. 10 is an external perspective view of a conventional microwave oven.

FIG. 11 is a front sectional view of a conventional microwave oven.

[Explanation of symbols]

1 ... inner box, 2 ... outer box, 3 ... door, 4 ... operation panel, 5 ...
Machine room, 6: Weight sensor, 7: Leg, 8: Cooling fan, 9
... heat insulation member, 10 ... space, 11 ... cooling air, 12 ... supply and exhaust holes, 20 ... partition plate, 21 ... interior light, 22 ... circuit board,
23 ... air layer, 24 ... air layer constituent member, 100 ... heating chamber, 101 ... upper heater, 102 ... lower heater, 103 ... rotating plate.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Osamu Sakurai 3-1, Shinjuyo-ji, Kashiwa-shi, Chiba Japan Nippon Home Tech Co., Ltd. F-term in home tech (reference) 3K090 AA02 BA02 EB25 3L086 AA01 BA08 BB01 DA17 DA27

Claims (7)

[Claims] 1. A heating chamber (10) for cooking an object to be heated.
In the heating cooker having the inner box (1) set to 0), the air for cooling the component to be cooled has six outer surfaces constituting the inner box, a ceiling surface (1a), a bottom surface (1b), and a right side which is a side surface. The surface (1c), the left side surface (1d), the back surface (1e), and the front surface (1f) flow through only one or two surfaces, and the other outer surfaces are insulated by the heat insulating member (9). A heating cooker, wherein a cooling system using cooling air (11) and a heat insulating system using the heat insulating member are separated. 2. An outer box (2) covering the periphery of the inner box, wherein one or two outer surfaces of the inner box through which the cooling air flows and an inner surface of the outer box opposed thereto. The cooking device according to claim 1, characterized in that there is no supply / exhaust hole (12) through which the cooling air enters and exits, except for one or two spaces (10) configured. 3. An outer surface of the inner box through which the cooling air flows is any one of four surfaces forming side surfaces of the inner box and two surfaces of the bottom surface. The heating cooker according to claim 1 or 2. 4. A machine room (5) containing a component to be cooled is provided on one side surface which is an outer surface of the inner box, and a weight sensor (6) is provided on the bottom surface. The cooking device according to any one of claims 1 to 3, wherein the cooking device comprises two surfaces, the bottom surface and a side surface provided with the machine room. 5. It has a cooling fan (8) and has at least two functions of oven cooking and range cooking,
At the time of oven cooking, without operating the cooling fan, the cooling air flows from the bottom surface toward the side surface where the machine room is provided by an upward flow of a chimney effect by natural convection,
The cooking according to any one of claims 1 to 4, wherein the cooling air flows from a side surface provided with the machine room toward the bottom surface by operating the cooling fan during the range cooking. vessel. 6. The machine room containing a component to be cooled is provided on one of the ceiling surface and the bottom surface, and the outer surface through which the cooling air flows is one of the ceiling surface or the bottom surface provided with the machine room. The heating cooker according to claim 1, wherein the heating cooker is only one side. 7. At least one of the heat insulating members constituting the heat insulating system is an air layer (23), and the thickness of the air layer is suppressed to a clearance dimension where convection does not occur in the air, and the air layer (23) is formed in the air layer. The heating cooker according to any one of claims 1 to 6, wherein the air is kept in a substantially sealed state so as to hardly communicate with the outside.