JP4575236B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device that cooks food, and more particularly to a cooking device that can improve the heat insulation of a heating chamber and increase the amount of heat input to an object to be heated.

  In a conventional cooking device, a heating heater is installed in the heating chamber, and heat is input into the heating chamber by heat conduction, radiation and convection from the top surface of the heating chamber heated to a high temperature by the heating heater. The air in the heating chamber and the object to be heated are heated. On the other hand, between the heating chamber and the housing, in order to prevent the heat of the heating chamber from being transferred to the housing and the surrounding air, each wall of the heating chamber except the under floor space of the machine room and the heating chamber is mutually connected. A substantially hermetically sealed air layer heat insulation structure formed so as not to communicate and prevent convection inside is provided to prevent heat from being transmitted to other than the heating chamber (see, for example, Patent Document 1).

JP 2000-213755 A (page 3, FIG. 1)

  In the conventional cooking device, the heating chamber is directly insulated by providing a substantially hermetic air layer heat insulation structure, but heat is transmitted from the wall to the outside of the heating chamber, causing heat loss. there were.

The present invention has been made to solve the above-described problems, and prevents heat from being radiated from the wall surface to the outside of the heating chamber by heat conduction, thereby reducing heat loss. The purpose is to increase the amount of heat transmitted to the heated object and to obtain a heating cooker with high heating performance.
It is another object of the present invention to obtain a heating cooker that reduces the amount of heat transmitted to the upper surface of the casing and has a small temperature rise at the upper portion of the casing. It is another object of the present invention to obtain a heating cooker that reduces the amount of heat transmitted to the components installed around the heating chamber and that is highly reliable and low in cost.

A heating cooker according to the present invention includes a heating chamber that has a heater and heats an object to be heated by the heater, a partition plate that is provided around the heating chamber and is not in contact with the heating chamber , and a heating chamber . A heat insulating air layer having a thickness of 5 cm or less provided between the partition plate and the upper surface air layer and a back surface formed by the partition plate and the housing disposed outside the heat insulating air layer; An air layer comprising an air layer is provided, the upper air layer and the rear air layer are communicated by providing an opening in the partition plate, and a motor, a heating chamber light, and an infrared sensor are attached to the outer surface of the partition plate for heating. The thickness of the insulating air layer to which the room lamp and the infrared sensor are attached is made thinner than the thickness of the other insulating air layers.

  In the heating cooker of the present invention, the periphery of the heating chamber is covered with an almost airtight air layer, and since the heating chamber and the partition plate are not in contact with each other, heat conduction to the outside of the heating chamber can be reduced, By increasing the amount of heat input into the heating chamber, the heating ability of the object to be heated can be improved.

Embodiment 1 FIG.
1 is a perspective view of a heating cooker according to Embodiment 1 of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a transverse sectional view of FIG. As shown in the figure, a heating chamber 2 is provided inside the main body 1, and a waveguide 3 is provided on the bottom surface of the heating chamber 2 and connected to the magnetron 4. Since the magnetron 4 may generate high heat during operation, a cooling fan for forcibly cooling the magnetron 4 may be provided in the vicinity of the magnetron 4. A top heater 6 is attached to the top surface 5 of the heating chamber 2, a back heater 7 is attached to the back surface 11, and an object to be heated 8 is placed in the heating chamber 2. An openable / closable door 9 is attached to the front surface of the heating chamber 2, and an operation panel 10 is provided on the upper portion of the door 9.

  A rear partition plate 12 is provided upright on the rear surface 11 of the heating chamber 2 up to the upper surface of the main body 1, and an upper surface partition plate 13 is provided on the upper surface 5 of the heating chamber 2. 15 includes a right partition plate 16, and a left surface 17 of the heating chamber 2 includes a left partition plate 18. Between these partition plates 12, 13, 16, 18 and the heating chamber 2, For example, a heat insulating air layer 14 having a substantially sealed heat insulating structure having a thickness of 5 cm or less is provided. Further, as shown in FIGS. 2 and 3, the partition plates 12, 13, 16, and 18 are formed independently of each other. However, these need not be configured separately, and may be configured integrally. . In addition, although not shown in the figure, the convection motor, the heating chamber light, the infrared sensor, etc. are attached to the heating cooker.

Next, the operation will be described. The door 9 is opened, the article 8 to be heated is put into the heating chamber 2, the door 9 is closed, the operation panel 10 is operated, and the display is confirmed. In this way, the object to be heated 8 is heated by microwaves oscillated from the magnetron 4 and flowing through the waveguide 3, or by heat from the upper surface heater 6 and the rear surface heater 7 provided on the upper surface and the rear surface of the heating chamber 2. .
That is, when the upper heater 6 and the rear heater 7 are energized, the heaters 6 and 7 generate heat by converting electric power into heat by their internal resistance. The generated heat is transmitted to the upper surface 5 of the heating chamber 2 by heat conduction, and heats the air inside the heating chamber 2 and the object to be heated 8 by heat conduction, radiation, and convection. After cooking the heated object 8 by cooking, the door 9 is opened and the heated object 8 is taken out.

  During the heating described above, a part of the heat is generated in the heat insulating air layer 14 in a substantially sealed state constituted by the heating chamber 2, the upper surface partition plate 13, the rear surface partition plate 12, the right surface partition plate 16, and the left surface partition plate 18. However, since the heat conductivity of air is low and the air layer has a certain thickness that is difficult to cause convection, the amount of heat transferred to the outside of the heating chamber 2 by heat conduction can be reduced. Therefore, it is possible to increase the amount of heat input for heating the article 8 to be heated.

Embodiment 2. FIG.
FIG. 4 is a longitudinal cross-sectional view of a heating cooker according to Embodiment 2 of the present invention. In the first embodiment, since the rear partition plate 12 is erected up to the upper surface of the main body 1, the housing upper surface air layer 19 and the housing rear air layer 20 do not communicate with each other. However, in the second embodiment, An opening 21 is provided in the upper part of the rear partition plate 12.
In this way, convection is caused in the housing upper surface air layer 19, exhaust heat is promoted, and temperature rise of the housing upper surface 22 is suppressed.
Other configurations, operations, and effects are substantially the same as those shown in the first embodiment, and a description thereof will be omitted.

Embodiment 3 FIG.
FIG. 5 is a longitudinal sectional view of a heating cooker according to Embodiment 3 of the present invention, and FIG. 6 is a transverse sectional view of FIG. In the third embodiment, the convection motor 23 is attached to the outside of the rear partition plate 12, the heating chamber lamp 24 is attached to the outside of the left surface partition plate 18, and the infrared sensor 25 is attached to the outside of the right surface partition plate 16.
Since other configurations and operations are substantially the same as those shown in the first embodiment, the description thereof is omitted.

  As described above, since the components such as the convection motor 23, the heating chamber lamp 24, and the infrared sensor 25 are attached outside the respective partition plates 12, 18, 16, the amount of heat transmitted to each part is reduced, and the temperature rises. It is possible to suppress the deterioration due to thermal fatigue of each component, and the reliability of the component can be improved. Moreover, since the heat-resistant temperature of each component can be lowered, the cost of each component can be reduced.

It is a perspective view of the heating cooker which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of FIG. It is a cross-sectional view of FIG. It is a longitudinal cross-sectional view of the heating cooker which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view of the heating cooker which concerns on Embodiment 3 of this invention. It is a cross-sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body, 2 Heating chamber, 6 Upper surface heater, 7 Back surface heater, 8 To-be-heated object, 12 Back surface partition plate, 13 Upper surface partition plate, 14 Heat insulation air layer, 16 Right surface partition plate, 18 Left surface partition plate, 19 Case upper surface air Layer, 20 housing back air layer, 21 aperture, 23 convection motor, 24 heating chamber light, 25 infrared sensor.

Claims (1)

A heating chamber for heating the object to be heated by the heater has a heater, and a partition plate provided in the heating chamber in a non-contact there around the heating chamber, between the heating chamber and the partition plate A heat insulating air layer having a thickness of 5 cm or less provided in a substantially sealed manner, and a top air layer and a back air layer formed outside the heat insulating air layer and formed by the partition plate and the casing. With an air layer,
The upper air layer and the rear air layer are communicated by providing an opening in the partition plate,
A heating, characterized in that a motor, a heating chamber light, and an infrared sensor are attached to the outer surface of the partition plate, and the thickness of the insulating air layer to which the heating chamber light and the infrared sensor are attached is made thinner than the thickness of the other insulating air layers. Cooking device.

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