KR100217190B1 - Microwave oven - Google Patents

Abstract

The present invention relates to a heating cooker, such as a microwave oven, which facilitates assembly and wiring of electrical parts to a machine room and improves insulation between high pressure parts and low pressure parts, and the cooker main body 1 includes an outer box. (2) and an inner box (3), between which a machine room (7) is formed, wherein the high pressure transformer (9) and the high pressure condenser (10) are attached to the high pressure side attachment substrate (17) and the door lock switch ( 11), the relay drive circuit 12, the damper device 13, and the like are attached to the low pressure side attaching substrate 19, and the magnetron 8 is provided near the center of the side plate portion 7a of the machine room 7. And it is characterized in that the high-pressure side attached substrate 17 is installed at the rear, and the low-pressure side attached substrate 19 is installed at the front side.

Description

Cooker

The present invention relates to a heating cooker such as a microwave oven.

Conventionally, a heating cooker such as a microwave oven has a cooking chamber inside the main body of the cooker and at the same time has a machine room, and the machine room is attached with electrical components such as a high pressure transformer, a high pressure condenser, a door lock switch, and a relay driving circuit.

However, in the related art, since the aforementioned electrical parts are attached to the bottom plate or the side plate in the machine room, respectively, it is necessary to take care of the attachment of the electrical parts, and the wiring is cumbersome since all the electrical parts are attached. In addition, the electric parts are divided into high voltage parts and low pressure parts, which have a problem that they are not preferable for electrical insulation because they are mixed and wired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a heating cooker capable of simplifying the attachment and wiring of electrical parts to a machine room and at the same time improving the insulation property between the high pressure part and the low pressure part. There is this.

1 is a longitudinal side view of a machine room section showing one embodiment of the present invention;

2 is a partially broken plan view,

3 is a plan view of a high pressure side attachment substrate portion;

4 is a longitudinal side view of the damper opening portion;

5 is a perspective perspective view showing the air distribution during cooking of the stove;

Fig. 6 is a perspective perspective view showing the distribution of air at the time of cooking the heater.

* Explanation of symbols for main parts of the drawings

1: Stove main body (cooker main body) 4: Heating cooking chamber

6: operation panel 7: machine room

8: magnetron 9: high pressure transformer

10: high pressure condenser 11: door lock switch

12: relay drive circuit 13: damper device

15: cooking room light 16: pan device

17: high side mounting substrate 18: opening

19: low pressure side attachment substrate 20: heater

The invention of claim 1 has a cooking chamber having a cooking chamber inside the main body of the cooker and equipped with various electrical components. The high-voltage transformer, such as a high-pressure transformer and a high-pressure condenser, is attached to a high-voltage side attachment substrate, and a door lock switch or a relay drive circuit It is characterized in that low pressure parts such as the above are attached to the low pressure side attachment substrate, and each attachment substrate is installed in the machine room.

In the above configuration, since the electric parts are attached to each attachment board and the attachment boards are installed in the machine room, the electric parts can be collectively installed in the machine room for each attachment board, and the attachment and wiring of the electric parts can be simplified. In addition, high-voltage components such as high-voltage transformers and high-pressure capacitors are attached to the high-voltage side attachment board, and low-pressure components such as door lock switches and relay drive circuits are attached to the low-pressure side attachment boards. It can be installed separately and can improve the insulation between high and low pressure parts.

In the invention of claim 2, the magnetron is installed in the center of the inside of the machine room, and the high pressure side attachment substrate is installed in one direction before and after the magnetron, and the low pressure side attachment substrate is installed on the other side, and the cooling wind is directed above the magnetron. It characterized in that the fan device is generated toward.

In the above configuration, the cooling wind blown from the fan apparatus is injected into the magnetron and is divided into both sides, and is also injected into the high pressure side attachment substrate portion and the low pressure side attachment substrate portion. As a result, it is possible to effectively cool the high pressure part and the low pressure part while improving the cooling of the magnetron.

In the invention of claim 3, the high-pressure side attaching substrate has a horizontal portion extending below the magnetron and forms an opening in the horizontal portion, and a fan device is attached to the horizontal portion.

In the above configuration, it is possible to assemble the fan apparatus at the same time as the assembly of the high pressure component, and the adhesion of the fan apparatus is improved. Moreover, since the opening part is formed in this horizontal shape part, the blowing operation of a fan apparatus does not fall.

The invention of claim 4 is characterized in that the terminal of the high pressure component faces the space surrounded by the high pressure component.

In the above configuration, since the electric wire of the high voltage component passes through the space, it is easy to wire the electric wire and the electric wire of the low voltage component so that there is no fear of breakdown.

EMBODIMENT OF THE INVENTION Hereinafter, one Example of this invention is described with reference to drawings. 1 and 2 show a microwave oven as a heat cooker. The stove body 1, which is a cooker main body, is formed by installing an inner box 3 inside the outer box 2, and the inside of the inner box 3 consists of a heating cooking chamber 4. In addition, the door 5 is rotatably attached to the outer box 2. The door 5 is formed by mounting a glass window on a rectangular frame, and the front opening of the heating cooking chamber 4 is opened and closed by the rotation of the door 5.

Moreover, the operation panel 6 is provided in the front-right part of the stove main body 1. As shown in FIG. The operation panel 6 is provided with a switch, a start switch, and an indicator for setting cooking conditions such as a cooking mode and cooking time, and at the same time, other electronic parts and electronic circuits, although not shown on the back, are mounted. The circuit board is attached.

Inside the operation panel 6, a machine room 7 is formed between the outer box 2 and the inner box 3. In the machine room 7, various electric parts are provided. As this electric component, the magnetron 8, the high voltage transformer 9, the high voltage condenser 10, the plurality of door lock switches 11, the relay drive circuit 12, the damper motor 14 of the damper device 13, cooking Indoor lamp 15, fan device 16, and the like.

The magnetron 8 supplies microwaves into the heating cooking chamber 4, which is provided in the middle of the up-and-down direction of the left side plate 7a (the right side plate of the inner box 3) of the machine room 7. This magnetron 8 has a wave conduction tube 8a for supplying microwaves into the heating cooking chamber 4, so that the magnetron 8 is preferably installed directly on the left side plate 7a of the machine chamber 7. will be.

In addition, the high voltage transformer 9 and the high pressure capacitor 10, which are high-pressure parts, constitute a driving circuit portion for driving the magnetron 8, which is vertically up and down on the vertical portion 17a of the high-voltage side attachment substrate 17. The high pressure side attachment substrate 17 is attached to the left side plate 7a at the rear of the magnetron 8. In this case, the high pressure side attachment substrate 17 is provided with a slight gap between the left side plate 7a of the machine room 7. In the lower portion of the vertical portion 17a of the high-pressure side attaching substrate 17, a horizontal portion 17b is formed to extend forward, and as shown in FIG. 3, the opening portion 18b is formed in the horizontal portion 17b. ) Is formed.

The front end of the horizontal portion 17b is positioned below the magnetron 8, and the front end of the horizontal portion 17b is installed to allow the fan device 16 to blow upward. have. Moreover, this fan apparatus 16 is comprised from the fan motor 16a and the fan 16b.

On the other hand, the door lock switch 11, the relay drive circuit 12, the damper motor 14 of the damper device 13, and the cooking chamber light 15, which are low voltage components, are attached to the low pressure attachment substrate 19. The low pressure attaching substrate 19 is provided with a slight gap between the left side plate 7a of the machine room 7 in front of the magnetron 8. The door lock switch 11 is a switch operation based on the operation of the door lock mechanism 11a, and the relay drive circuit 12 supplies a relay 12b or a control power supply transformer 12c to the PC board 12a. Have The relay drive circuit 12 drives the relay 12b when driving the magnetron 8, when driving the heater 20 to be described later, or when driving a turntable motor (not shown).

Further, the damper device 13 opens and closes the damper plate 13a (see FIG. 4) through a cam (not shown) based on the driving of the damper motor 14, and is formed on the left side plate 7a in parallel with the damper. It is made to open and close the opening part 7b.

The heater 20 is installed on the upper surface of the upper box of the inner box 3, and a heater (not shown) is installed on the lower surface of the lower box, which is used for cooking an oven or cooking a grill. .

Here, the high voltage transformer 9 and the high pressure capacitor 10 include the secondary terminal 9a of the high voltage transformer 9 and the terminal 10a of the high voltage capacitor 10. It is provided so that 10 may face the space K which surrounds. In addition, the terminal 8a of the magnetron 8 also faces the space K (direction of the high pressure side attachment substrate 17) instead of the low pressure component side. The terminal 8a may be in any direction other than the low voltage component side. Thereby, insulation improvement can be aimed at. In addition, the fan motor 16a is attached such that the terminal 16t faces the opposite direction instead of the high voltage transformer 9 direction (high pressure component direction). Also in this case, insulation can be improved.

As shown in FIG. 5, a space portion connected to the machine room 7 is formed between the bottom plate portion 2a of the outer box 2 and the bottom plate portion 3a of the inner box 3, and among these space portions. The lower left part is provided with the partition board 21 which divides the left and right. The inlet port 22 is formed in the bottom plate part 2a on the right side of this partition board 21, and the exhaust port 23 is formed in the bottom plate part 2a on the left side, and the exhaust duct 23a is provided in this lower part. It is installed. The exhaust port 24 is also formed in the rear plate part of the machine room 7. Moreover, the exhaust passage part 25 which communicates with the exterior of the rear plate part of the outer box 2 is formed in the seat plate part of the heating cooking chamber 4.

However, at the time of stove cooking in which the magnetron 8 is driven, the damper device 13 opens the damper opening 7b and the fan device 16 is driven. At this time, the air outside the cooker main body 1 flows as shown in FIG. That is, although it is sucked in from the inlet 22 and passes through the machine room 7, part of it is discharged from the exhaust port 24 of the rear part of the machine room 7, but a part flows into the heating cooking chamber 4 from the damper opening 7b and exhaust path part. Discharged from (25). In addition, the remainder is discharged past the inner box 3 and past the exhaust port 23 and the exhaust duct 23a.

In this case, looking at the flow of air in the machine room 7, as shown in FIG. 1, the cooling wind blown from the fan device 16 is injected into the magnetron 8 as shown by the arrow and divided into both sides. It is also injected into the high pressure side attachment substrate 17 and the low pressure side attachment substrate 19. As a result, the magnetron 8 can be cooled well and the high pressure part and the low pressure part can be cooled effectively.

In addition, when heater cooking is performed, the damper device 13 closes the damper opening 7b and the fan device 16 is driven. At this time, the air outside the cooker main body 1 flows as shown in FIG. 6 as a whole. In this case, air does not flow into the heating cooking chamber 4, except that it is the same as described above.

In the present embodiment, the high voltage transformer 9, the high voltage condenser 10, the door lock switch 11, the relay drive circuit 12, the damper motor 14 of the damper device 13, the interior of the cooking chamber 15, Since the electrical components such as the fan device 16 are attached to the attachment substrates 17 and 19 in advance, and then the attachment substrates 17 and 19 are installed in the machine room 7. Since it can be collectively installed in the machine room 7 for every 19), the attachment of electrical components can be simplified and the assembly efficiency can be improved. In addition, the electrical wiring can be finished on each of the substrates 17 and 19, so that the wiring can be simplified.

In addition, high voltage components such as the high voltage transformer 9 and the high pressure condenser 10 of the electrical components are attached to the high pressure side attachment substrate 17, and the door lock switch 11, the relay drive circuit 12, and the damper device 13 are attached. The low-pressure parts such as the damper motor 14 and the inside of the cooking chamber 15 are attached to the low-pressure side attachment substrate 19 so that the high-pressure parts and the low-pressure parts can be naturally divided and installed to improve insulation between the high-pressure parts and the low-pressure parts. Can be planned.

In addition, according to the present embodiment, the magnetron 8 is disposed almost in the center of the machine room 7, the high-pressure side attaching substrate 17 is disposed at the rear of the magnetron 8, and the low-pressure side attaching substrate 19 is provided at the front side. Since the fan device 16 is installed at the bottom of the magnetron 8 and the cooling wind is directed upward, the cooling air blown out of the fan device 16 is sprayed on the magnetron 8 and divided into both sides. The high pressure side attachment substrate 17 and the low pressure side attachment substrate 19 are also sprayed. As a result, cooling of the magnetron 8 which tends to be particularly high in temperature can be made favorable, and high-pressure parts and low-pressure parts can also be cooled effectively.

In this case in particular, the high-pressure side attaching substrate 17 is arranged behind the magnetron 8 so that the high-pressure component can be separated from the operation panel 6 and there is little influence on the operation panel 6 on which the electronic component is mounted. However, the above cooling effect can be obtained if the high pressure side attachment substrate 17 is arranged in one of the front and rear directions of the magnetron 8 and the low pressure side attachment substrate 19 is arranged on the other side.

Further, according to the present embodiment, since the horizontal portion 17b is formed on the high-pressure side attachment substrate 17 extending below the magnetron 8, and the fan device 16 is attached to the horizontal portion 17b, the high-pressure component At the same time, the fan device 16 can be assembled and the fan device 16 can be assembled. In this case, since the opening 18 is formed in the horizontal portion 17b, the air of the fan device 16 can be assembled. Suction action Further, the blowing action is not lowered.

In addition, according to the present embodiment, the secondary terminal 9a of the high voltage transformer 9, which is the terminal of the high voltage component, and the terminal 10a of the high voltage capacitor 10 are directed toward the space K in which the high voltage component is surrounded. Since the electric wire of the high voltage component passes through the space K, it is easy to wire so that the electric wire does not cross the electric wire of the low voltage component and there is no fear of breakdown.

As can be seen from the above description, the present invention can achieve the following effects.

According to the invention of claim 1, since the attachment board is installed in the machine room after attaching the electrical parts to the attachment board in advance, the electrical parts can be collectively installed in the machine room for each attachment board, thereby simplifying the attachment and wiring of the electrical parts. It can be planned and the assembly effect is improved. In addition, high-voltage parts such as high-voltage transformers and high-pressure capacitors are attached to the high-voltage side attachment board, and low-pressure parts such as door lock switches and relay drive circuits are attached to the low-pressure side attachment boards. Since it can be installed separately, the insulation between a high voltage part and a low pressure part can be improved.

According to the invention of claim 2, the cooling air blown out of the fan apparatus is sprayed to the magnetron at the same time, and divided into both sides, and is also sprayed to the high-pressure side attachment substrate portion and the low-pressure side attachment substrate portion, and as a result, the magnetron which tends to become high temperature is well cooled. In addition, the high pressure part and the low pressure part can be cooled effectively.

According to the invention of claim 3, the fan apparatus can be assembled at the same time as the high-pressure parts are assembled, and the assembly of the fan apparatus is improved. Moreover, since the opening part is formed in this horizontal shape part, the blowing operation of a fan apparatus does not fall.

According to the invention of claim 4, since the terminal of the high voltage component faces the space surrounded by the high voltage component, the wiring of the high voltage component and the wire of the low voltage component are easily connected so that there is no fear of breakdown.

Claims (4)

In the heating cooker having a heating cooking chamber inside the cooker main body, and having a machine room equipped with various electric parts, A high voltage component such as a high voltage transformer and a high pressure capacitor is attached to the high pressure side attachment substrate, and low pressure parts such as a door lock switch or a relay driving circuit are attached to the low pressure side attachment substrate, and each attachment substrate is installed in the machine room. Cooker. The method of claim 1, A magnetron is installed in the center of the machine room, and a high pressure side mounting board is installed on one side of the front and rear of the magnetron, and a low pressure side mounting board is installed on the other side, and a fan device that generates cooling wind upwards at the bottom of the magnetron. Heating cooker characterized in that installed. The method of claim 2, The high pressure side attachment substrate has a horizontal shape extending below the magnetron and forms an opening in the horizontal shape, and a pan device is attached to the horizontal shape. The method of claim 1, And a terminal of the high pressure component facing the space surrounded by the high pressure component.

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