JPH08152140A - Heating cooker - Google Patents

Abstract

PURPOSE: To efficiently cool a door of a heating cooker by a method wherein two transparent plates are arranged double in the door with a space between them and cooling air is sent into the space to cool the door. CONSTITUTION: When a door is in a closed state, a rear space 11, a lower air path 10, a space 7 inside the door 4, and an upper air path 10 communicate with each other to form a cooling air circulation path. When an electronic part cooling fan 12 is operated, cooling air circulates along the circulation path and cooling air heated is discharged outside through a vent opening. The cooling air cools the lower part of a heating compartment 2 when it flows along the lower air path 10, the door 4 when it passes through the space 7 and the upper part of the heating compartment 2 when it flows along the upper air path 10. As a result, a device is entirely cooled without waste. Especially, as the door 4 is cooled with the cooling air prevented from scattering outside, cooling is efficiently carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door cooling structure for a cooking device such as a microwave oven.

[0002]

2. Description of the Related Art In a cooking device such as a microwave oven, the door portion may become extremely hot during use, which is dangerous if the user touches it.

The invention of Japanese Utility Model Laid-Open No. 3-103910 discloses a structure for cooling the above-mentioned door portion. The door is cooled by blowing cooling air from above onto the front surface of the door.

[0004]

However, the above conventional structure has the following problems.

First, the cooling air is guided to the outside of the equipment to be blown, so that the cooling air is scattered and it is difficult to intensively cool the door. Particularly, the lower part of the door far from the blowing position is sufficiently cooled. Was not done to.

Further, the cooling air hits the user's hands, etc., causing discomfort. The present invention has been made in view of the above circumstances, and an object thereof is to enable efficient cooling of a door of a heating cooker.

[0007]

According to a first aspect of the present invention, there is provided a heating cooker including a door having a transparent plate on the front surface of a heating chamber of a device body, wherein the transparent plate is provided through a space. It is arranged in a double structure, and cooling air is sent into the space to cool the door.

According to a second aspect of the present invention, in the first aspect of the present invention, ventilation holes are formed at opposite positions of the front plate of the heating chamber and face the ventilation holes of the frame of the door. Ventilation holes are formed at the respective positions, and cooling air generated by the operation of the electronic component cooling fan in the device body is passed through the ventilation holes in one of the front plate and the door frame, respectively, into the space between the transparent plates. Was introduced,
In addition, the air is discharged through each of the other opposite ventilation holes.

According to a third aspect of the present invention, in the first aspect of the invention, ventilation holes are formed in the upper and lower positions of the front plate of the heating chamber, and the ventilation holes of the frame of the door are opposed to the ventilation holes. Ventilation holes are formed in each, and ventilation passages are formed in the upper and lower positions of the heating chamber in the device body, and cooling air by the operation of the electronic component cooling fan is relatively located at the lower position from the lower ventilation passage. Introduced into the space between the transparent plates through each ventilation hole,
It is configured to be discharged through the respective ventilation holes facing each other at the upper position and to the outside through the ventilation passage at the upper position.

[0010]

According to the first aspect of the present invention, the cooling air passes through the space between the transparent plates that are doubly arranged, so that the door is efficiently cooled.

According to a second aspect of the present invention, in addition to the first aspect of the invention, cooling air from the electronic component cooling fan is introduced into the space between the transparent plates from one of the opposing ventilation holes, and the other of them. The door is cooled by being discharged from each of the air vents facing each other.

According to a third aspect of the present invention, in addition to the first aspect of the invention, the cooling air from the electronic component cooling fan is circulated between the lower portion of the heating chamber, the inside of the door, and the upper portion of the heating chamber, and heating is performed in addition to the door. The chamber is cooled.

[0013]

1 is a perspective view of a microwave oven which is a heating cooker of the present invention, and FIG. 2 is a simplified configuration diagram showing an internal configuration.

A heating chamber 2 is provided in the device body 1, and a door 4 is provided on the front surface thereof. The door 4 is configured by mounting two transparent plates 6 on a frame body 5 so as to form a space 7 between them, and further, on the inner surfaces above and below the frame body 5, the space 7 is formed.
There are four ventilation holes 8 communicating with each other.

The upper and lower positions of the heating chamber 2 in the device body 1 are respectively defined as ventilation passages 10, and a rear space 11 communicating with the ventilation passages 10 at the lower position is provided for cooling electronic components such as a high voltage transformer (not shown). A cooling fan 12 is provided. Further, the exhaust hole 1 is provided at the rear end of the ventilation path 10 at the above position.
5 are provided. Further, four ventilation holes 14 are formed at positions facing the ventilation holes 8 when the doors 4 at the upper and lower positions of the front plate 16 of the heating chamber 2 are closed.

With the above structure, when the door 4 is closed, the rear space 11, the lower ventilation passage 10,
A cooling air circulation path is formed in which the space 7 in the door 4 and the upper ventilation path 10 communicate with each other, and when the electronic component cooling fan 12 is operated, the cooling air is circulated along the circulation path to heat the cooling. The wind is exhausted to the outside through the exhaust hole 15. When the cooling air passes through the lower ventilation passage 10, the heating chamber 2
Of the heating chamber 2 while cooling the door 4 when passing through the space 7 and the upper ventilation passage 10 when passing through the space 7, thus cooling the entire device without waste. Be seen. In particular, the cooling of the door 4 is performed without the cooling air being scattered to the outside, so that efficient cooling is possible.

[0017]

According to the first or second aspect of the present invention, the cooling air passes through the space between the transparent plates that are doubly arranged, so that the door can be cooled efficiently and the device Safety is improved.

Particularly, according to the second aspect of the invention, a lean door cooling structure using the electronic component cooling fan can be obtained.

According to the invention of claim 3, in the invention of claim 1, the cooling air from the electronic component cooling fan is circulated through the lower part of the heating chamber, the inside of the door, and the upper part of the heating chamber, and In addition, the heating chamber is cooled, and a cooling structure that does not waste the entire device can be obtained.

[Brief description of drawings]

FIG. 1 is a front perspective view of a microwave oven of the present invention.

FIG. 2 is a simplified configuration diagram showing an internal configuration of the microwave oven of the present invention.

[Explanation of symbols]

 1 Equipment main body 2 Heating chamber 4 Door 6 Transparent plate 7 Space

Claims (3)

[Claims] 1. A heating cooker comprising a door having a transparent plate in front of a heating chamber of a device body, wherein the transparent plates are doubly arranged through a space and cooling air is blown into the space. A heating cooker characterized by cooling the door. 2. A ventilation hole is formed at each of opposite positions of a front plate of the heating chamber, and each ventilation hole is formed at a position of the door frame facing the ventilation hole. Cooling air by the operation of the electronic component cooling fan is introduced into the space between the transparent plates through each of the air vents facing each other of the front plate and the frame of the door,
The cooker according to claim 1, wherein the cooker is discharged through each of the other opposite ventilation holes. 3. A ventilation hole is formed in each of the upper and lower positions of a front plate of the heating chamber, and a ventilation hole is formed in each position of the door frame facing the ventilation hole. Ventilation passages are formed in the upper and lower positions of the heating chamber, and cooling air by the operation of the electronic component cooling fan is introduced into the space between the transparent plates from the ventilation passages in the lower position through the ventilation holes facing each other in the lower position. ,
The cooking device according to claim 1, wherein the cooker is discharged through the ventilation holes facing each other at the upper position, and is discharged to the outside through the ventilation passage at the upper position.