KR100395639B1 - Microwave oven - Google Patents

Abstract

The present invention relates to a microwave oven having a main body casing for forming a cooking chamber, an outer casing surrounding the main body casing and forming a parts chamber outside the cooking chamber, and a blowing fan installed in the parts chamber. And a panel housing disposed at the front of the casing to accommodate components including a circuit board for the operation panel, the inlet for inlet of external air and an outlet opening toward the air passage leading to the blower fan. do. As a result, the cooling efficiency of the circuit board and the components in the panel housing formed in the door can be improved.

Description

Microwave oven {MICROWAVE OVEN}

The present invention relates to a microwave oven, and more particularly, to a microwave oven capable of improving the cooling efficiency of the operation panel formed on the door.

The wall-mounted microwave oven, which is installed on the upper part of the microwave oven and serves as a hood, as illustrated in FIG. 6, has an outer casing 101 and an outer casing 101 that form an exterior as shown in FIG. 6. It has a lower casing 103 to be coupled, and a main body casing 102 coupled to the outer casing 101 and the lower casing 103 to form the cooking chamber 110 and the component chamber 115.

The front of the cooking chamber 110 is provided with a door 125 for opening and closing the front opening, the front of the component chamber 115 is coupled to the operation panel 112 is provided with a plurality of operation buttons for operation from the outside is have. In addition, the component chamber 115 is provided with a magnetron 116 and a high voltage transformer and a high voltage capacitor (not shown) to stably supply current to the magnetron 116 so as to irradiate electromagnetic waves into the cooking chamber 110. .

On the other hand, the outer casing 101, the exhaust port 107 is formed in the central region behind the upper surface, a pair of inlet port 106 is formed in the central region of the lower casing 103. And, between the outer casing 101 and the main body casing 102, the exhaust duct not shown to discharge the air sucked from the inlet port 106 of the lower casing 103 through the exhaust port 107 of the outer casing 101 Is formed, the hood fan 120 is installed in the exhaust port 107 region of the outer casing 101 to discharge the air introduced through the exhaust duct to the outside. In addition, a ventilation space is formed between the upper surface of the outer casing 107 and the main body casing 102 to discharge the air passing through the exhaust duct and the air from the inside of the cooking chamber 110 to the interior. The grill member 130 disposed in the longitudinal direction is attached to the upper portion of the door 125.

However, not only the wall-mounted microwave oven but also the microwave oven is relatively smaller in size than the exterior due to the formation of the component chamber 115 for accommodating the device components. In particular, in the case of the wall-mounted microwave oven, since the space to be installed is determined in advance, when designing the exterior according to the installation space, the cooking chamber 110 has a width in the front and rear directions smaller than the width in the left and right directions to properly utilize the space of the cooking chamber. There is a problem that can not be achieved.

In order to solve this problem, the component chamber is formed in the spaced space between the outer casing 101 and the main body casing 102 to which the grill member 130 is attached, and the operation panel is formed on the door 125 to form a cooking chamber ( A method for increasing the volume of 110 is shown.

However, in the related art, since the operation panel is mounted in the component chamber 115, the circuit board of the operation panel is forcedly cooled by the blower fan. This will not be done. Therefore, there is a problem that this may cause shortening the life of the component and malfunction.

Accordingly, it is an object of the present invention to provide a microwave oven capable of improving the cooling efficiency of the operation panel formed on the door.

1 is an installation perspective view of a wall-mounted microwave oven according to an embodiment of the present invention,

2 is an exploded perspective view of the microwave oven of FIG. 1;

3 is an enlarged exploded perspective view of the operation panel region of FIG. 2;

Figure 4 is a microwave oven side cross-sectional view of FIG.

5 is a front sectional view of the inlet region taken along the line VV of FIG. 3;

6 is an exploded perspective view of a conventional wall-mounted microwave oven.

<Description of the symbols for the main parts of the drawings>

1: outer casing 2: main body casing

3: lower casing 5: rotary tray

10: cooking chamber 15a, 15b: parts chamber

21: blower fan 25: door

26: panel housing 26a: operation panel

27: inlet 28: guide guide

29: outlet 30: grill member

31: inlet 40: circuit board

According to the present invention, there is provided a microwave oven having a main body casing for forming a cooking chamber, an outer casing surrounding the main body casing and forming a parts chamber outside the cooking chamber, and a blowing fan installed in the parts chamber. And a panel housing disposed in front of the main body casing to accommodate components including a circuit board for an operation panel, the inlet for inflow of external air and an outlet opening toward an air passage leading to the blower fan. It is achieved by a microwave oven characterized in that.

The apparatus may further include a grill member mounted at a front of the component chamber and having an intake port formed to correspond to the outlet port so that external air is introduced by the blower fan and the outlet port of the panel housing communicates with the air passage. can do.

The panel housing may be formed in one region of the door installed in front of the main body casing, and the component chamber may be formed above the main body casing, and the grill member may be disposed to be parallel to the longitudinal direction of the door. Can be.

The apparatus may further include a rib-shaped guide guide protruding along the circumferential edge of the outlet to surround the inlet of the grill member and the outlet of the panel housing in the closed state of the door, thereby improving air transfer efficiency to the panel housing. Can be.

On the other hand, the inlet is formed with a plurality of guide plates inclined upward toward the panel housing inner region in parallel with each other, it is easy to guide the air to the outlet side.

Hereinafter, the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the wall-mounted microwave oven includes an outer casing 1 forming an outer appearance, a lower casing 3 coupled to a lower end of the outer casing 1, and an outer casing ( 1) and a main body casing 2, which is coupled to the lower casing 3 to form the cooking chamber 10 and the component chambers 15a and 15b.

The outer casing 1 has an exhaust port 7 formed in the central region behind the upper surface, and a pair of suction ports 6 are formed in the central region of the lower casing 3. In addition, an exhaust duct (not shown) is provided between the outer casing 1 and the main body casing 2 so that the air sucked from the inlet 6 of the lower casing 3 can be discharged through the exhaust port 7 of the outer casing 1. Is formed, and a hood fan 20 is installed in the exhaust port 7 region of the outer casing 1 to discharge the air introduced through the exhaust duct to the outside.

On the other hand, between the upper surface of the outer casing (1) and the main body casing (2) is formed a ventilation space for discharging the air passing through the exhaust duct and the air from the inside of the cooking chamber 10 to the room, and in front of the ventilation space The grill member 30 is attached to the upper portion of the door 25 in the longitudinal direction. In the central area of the ventilation space, a pair of hood ducts 35 through which the air blown from the rear hood fan 20 is discharged is extended from the hood fan 20 to the grill member 30 area. Each hood duct 35 is connected to an air discharge hole (not shown) formed to penetrate the cooking chamber 10 at an upper portion of the cooking chamber 10 to discharge the air from the cooking chamber 10. It is installed parallel to 35). In addition, a plurality of rotary trays 5 are provided inside the cooking chamber 10.

On the other hand, a pair of parts chambers 15a and 15b are formed at both sides of the hood duct 35 and the cooking chamber duct 37, and the hood ducts 15a and 15b communicate with each other. The rear lower region of the 35 and the cooking chamber duct 37 are recessed upward to form a connection passage 38. In the front region of the component chamber 15b on one side, a blowing fan 21 for sucking the indoor air through the grill member 30 and cooling the device parts is provided at the rear of the grill member 30. In the rear region 21, a high voltage transformer 17 and a high voltage capacitor 19 are mounted. In addition, the magnetron 16 is installed in the component chamber 15a on the other side, and the air from the blower fan 21 is led to the magnetron 16 through the connection passage 38. Meanwhile, a plurality of air supply holes 23 penetrating into the cooking chamber 10 are formed in the region where the magnetron 16 is installed to supply external air into the cooking chamber 10.

As the component chambers 15a and 15b are installed in the upper portion of the cooking chamber 10, the volume of the cooking chamber 10 increases as the cooking chamber 10 extends to an area where the component chamber was conventionally formed. The door 25, which is attached to the front of the cooking chamber 10 and opens and closes the front opening, also has an extended length around the hinge of one side.

On the other hand, in one region of the door 25, an operation panel for operating the component parts mounted in the component chambers 15a and 15b is formed. 2 and 3, the door 25 has an operation panel plate 26a having a plurality of operation buttons and transmits an operation signal of an operation button of the operation panel plate 26a to each device part. The panel housing 26 in which the circuit board 40 is accommodated is formed. Then, the power from the circuit board 40 accommodated in the door 25 is connected to the device component through the hinge region of the door 25.

The panel housing 26 forms the same plane as the grill member 30 when the door 25 is closed, and thus the upper surface of the panel housing 26 is in contact with the lower surface of the grill member 30. Here, a suction port 31 is formed in the lower surface of the grill member 30 in communication with the outlet 29 of the panel housing 26 which will be described later in an area in contact with the panel housing 26.

On the other hand, a plurality of inlets 27 for inflow of external air are formed in the lower region at the side of the panel housing 26 located at the free end along the longitudinal direction of the door 25, and each inlet 27 is provided. Inside of the guide plate 27a for guiding the introduced air to the upper side is formed to be inclined upward. In addition, an outlet 29 corresponding to the inlet 31 of the grill member 30 is formed on the upper surface of the panel housing 26, and rib-shaped guides protruding from the plate surface along the circumferential edge of the outlet 29 are formed. A guide 28 is formed to maintain the airtightness between the inlet 31 of the grill member 30 and the outlet 29 of the panel housing 26.

By such a configuration, when the microwave oven is operated by the operation panel operation from the outside, various equipment parts and the blowing fan 21 are driven, and the parts are driven through the grill member 30 by the driving of the blowing fan 21. External air flows into the chambers 15a and 15b. The external air flows into the panel housing 26 through the inlet port 27 by the pressure generated when the external air flows into the grill member 30 by the blower fan 21. The air introduced into the panel housing 26 cools the circuit board 40 and the components, and then is discharged to the inlet 27 to pass through the inlet 31 of the grill member 30. Then, the magnetron 16 is cooled together with the external air introduced through the grill member 30 by the blowing fan 21, and is introduced into the cooking chamber 10 through the air supply hole 23.

As described above, in the present invention, in order to forcibly cool the door 25 and the circuit board 40 in the formed panel housing, the component chambers 15a and 15b communicate with the panel housing 26 to form an air flow path. Accordingly, the cooling of the circuit board 40 and the component parts for the operation panel is effectively performed, thereby increasing the life of the parts and preventing malfunction due to overheating.

As described above, according to the present invention, it is possible to improve the cooling efficiency of the circuit board and the components in the panel housing formed in the door.

Claims (5)

In a microwave oven having a main body casing to form a cooking chamber, an outer casing surrounding the main body casing to form a component chamber outside the cooking chamber, and a blowing fan provided in the component chamber, A panel housing disposed at the front of the main body casing to receive a component including a circuit board for an operation panel, the inlet for inlet of external air and an outlet opening toward the air passage leading to the blower fan; The microwave oven characterized by the above. The method of claim 1, And a grill member mounted at the front of the component chamber and having an intake port formed to correspond to the outlet port so that external air is introduced by the blower fan and the outlet port of the panel housing is in communication with the outlet port. Microwave. The method of claim 2, The panel housing is formed in one region of the door installed in front of the main body casing, the component chamber is formed in the upper portion of the main body casing, the grill member is disposed to be parallel to the longitudinal direction of the door. microwave. The method of claim 3, wherein And a rib-shaped guide guide projecting along the circumference of the outlet so as to surround the inlet of the grill member and the outlet of the panel housing in the closed state of the door. The method of claim 4, wherein The inlet has a plurality of guide plates inclined upward toward the panel housing inner region is formed in parallel with each other.