KR20010011413A - Microwave oven - Google Patents

Abstract

The present invention relates to a main body having a cooking chamber and a component chamber, which are insulated from each other by a partition wall in which air passage holes are formed, a cooling fan installed in the component chamber, an inlet port through which blowing air from the cooling fan flows and the air passage hole. It relates to a microwave oven having an air guide for guiding the blowing air to the cooking chamber having an outlet, which is installed in the air guide and a damper for opening and closing the inlet; And driving means for opening and closing the damper. As a result, a microwave oven is provided which reduces parts to reduce manufacturing costs, improves productivity, prevents device noise, and efficiently utilizes space.

Description

Microwave oven {MICROWAVE OVEN}

The present invention relates to a main body having a cooking chamber and a component chamber, which are insulated from each other by a partition wall in which air passage holes are formed, a cooling fan installed in the component chamber, an inlet port through which blowing air from the cooling fan flows and the air passage hole. It relates to a microwave oven having an air guide to guide the blowing air to the cooking chamber having an outlet.

4 is a perspective view of an external casing disassembled state of a conventional microwave oven. As shown in the figure, a conventional microwave oven is disposed so as to surround the main body 101 and the main body 101 in which the cooking chamber 111 and the component chamber 110 are mutually partitioned by the partition wall 113. It has an outer "U" shaped outer casing (103).

A door 105 for pivoting the opening and closing of the front opening of the cooking chamber 111 is hinged at the front side of the cooking chamber 111 side of the main body 101, and the microwave oven is operated at the front of the component chamber 110 side of the main body 101. An operation panel 107 is provided. In the rear region of the cooking chamber 111 side of the main body 101, a convection heater (not shown) and a blowing fan (not shown) for forced convection of heat generated from the convection heater (not shown) are provided inside the cooking chamber 111.

In the component chamber 110, a magnetron 115 for outputting microwaves and supplying the microwaves to the cooking chamber 111, and a high voltage transformer 117 and a high voltage capacitor 119 for applying a high voltage to the magnetron 115 are installed. In the rear wall of the component chamber 110 in the rear region of the magnetron 115, a cooling fan 118 is installed to suck outside air and blow air toward the interior of the component chamber 110. In addition, an air guide 120 is provided in the component chamber 110 in front of the magnetron 115 to guide the blowing air from the cooling fan 118 into the cooking chamber 111.

5 is an enlarged perspective view of the air guide installation region of FIG. 4. As shown in this figure, the air guide 120, the inlet 121 through which the blowing air from the cooling fan 118 is introduced, and the blowing air introduced into the inlet 121 is discharged toward the inside of the cooking chamber 111. The outlet 123 is formed to be. The inlet 121 of the air guide 120 is opened toward the magnetron 115 so as to be located in front of the cooling fan 118 in the blowing direction, and the outlet 123 of the air guide 120 is the cooking chamber 111 and the parts. It is formed to surround the air passage hole 114 formed in the partition wall 113 partitioning the chamber 110.

On the other hand, the damping device 130 for opening and closing the air passage hole 114 is provided in the outlet 123 region of the air guide 120. The damping device 130 is composed of a damper 131 for rotating and opening the air passage hole 114, and a driving means 133 for rotating the damper 131.

The damper 131 is integrally bent from the lower end of the damper plate 141 and the damper plate 141 which is rotatably provided by the hinge shaft 152 on one side of the outlet 123 and the damper plate ( It has an interlocking part 143 in which the long hole 153 parallel to the width direction of 141 is formed.

At the circumferential end of the damper plate 141, a heat resistant rubber 161 is provided in close contact with the circumferential edge of the air passage hole 114 when the air passage hole 114 is closed by the damper 131. A shaft through hole 125 through which the eccentric shaft 157 of the cam driver 147 to be described later is rotatably passed is formed on the plate surface of the air guide 120 in the lower region of the interlocking portion 143.

In addition, the driving means 133 is coupled to the driving motor 145 installed in the lower region of the air guide 120 adjacent to the interlocking portion 143 of the damper 131 and the rotating shaft 155 of the driving motor 145. An eccentric shaft 157 integrally formed with the cam driving unit 147 so as to be spaced apart from the predetermined distance in the radial direction of the rotation shaft 155 on the cam driving unit 147 by rotating the damper 131. This is provided. The eccentric shaft 157 is located inside the long hole 153 formed in the linking portion 143 of the damper 131 through the through hole 125 of the air guide 120, the cam driving portion 147 The damper plate 141 is rotated by reciprocating the inside of the long hole 153 at the time of rotation.

With this configuration, when the operation of the microwave is started, a cooking mode using a convection heater (not shown) or a cooking mode using the magnetron 115 is selectively executed by a program input to a microcomputer (not shown). At this time, the damping device 130 installed in the air guide 120, in the cooking mode using a convection heater (not shown) to prevent the blowing air from the cooling fan 118 to flow into the cooking chamber 111. The air passage hole 114 is closed, and in the cooking mode using the magnetron 115, the air passage hole 114 is opened to allow the blowing air from the cooling fan 118 to flow into the cooking chamber 111. Let's go.

However, in the conventional microwave oven, since the damping device 130 is installed in the outlet 123 region of the air guide 120 so as to be adjacent to the air passage hole 114, a convection heater (not shown) is used. In the cooking mode, the blowing air from the cooling fan 118 is continuously introduced into the air guide 120 even when the air passage hole 114 by the damper 131 is blocked.

Accordingly, the damper plate 141 is provided to block the blowing air from flowing into the cooking chamber 111 through a gap formed between the damper plate 141 and the partition wall 113 in the circumferential area of the air passage hole 114. By providing the heat-resistant rubber 161 in close contact with the air passage hole 114 around the periphery of the end, there is a problem that the manufacturing cost is increased due to the addition of parts, productivity is reduced due to the addition of the assembly process, damper 131 When the air opening and closing of the air through hole 114 by using a), the heat-resistant rubber 161 is in contact with the partition 113 of the air passage hole 114 surrounding area there is a problem that the device noise is generated.

In addition, in such a conventional microwave oven, by providing a separate lamp accommodation space (not shown) on the outside of the cooking chamber 111 for the installation of an illumination lamp (not shown) that illuminates the inside of the cooking chamber 111 when cooking. However, there is an unreasonable problem that space utilization is inefficient.

Accordingly, an object of the present invention is to provide a microwave oven capable of reducing the production cost by reducing parts, improving productivity, preventing device noise, and making efficient use of space.

1 is a perspective view of a disassembled state of the outer casing of the microwave oven according to the present invention;

Figure 2 is an enlarged perspective view of the air guide installation area of Figure 1,

Figure 3 is a perspective view of the damping device and the lighting lamp exploded state of Figure 2,

4 is a perspective view of an external casing disassembled state of a conventional microwave oven,

5 is an enlarged perspective view of the air guide installation region of FIG. 4.

* Explanation of symbols for the main parts of the drawings

10: parts chamber 11: cooking chamber

13: bulkhead 15: magnetron

18: cooling fan 20: air guide

21: inlet 30: damping device

31: damper 33: drive means

40: lighting lamp 41: damper plate

43: linkage 45: drive motor

47: cam drive unit 52: hinge axis

53: long hole 57: eccentric shaft

According to the present invention, there is provided a main body having a cooking chamber and a component chamber, which are separated from each other by a partition wall in which air passage holes are formed, a cooling fan installed in the component chamber, and an inlet through which blowing air from the cooling fan flows. A microwave oven having an air outlet communicating with the air passing hole and having an air guide for guiding the blowing air to the cooking chamber, the microwave oven comprising: a damper installed at the air guide to open and close the inlet; It is achieved by a microwave oven, characterized in that it comprises a drive means for opening and closing the damper.

Here, it is preferable to further include an illumination lamp installed in the air guide adjacent to the outlet to illuminate the inside of the cooking chamber.

The damper may further include a hinge shaft fixed to one side of the inlet in a vertical direction; One side is effectively rotatably coupled to the hinge shaft having a damper plate for rotating and opening the inlet, the drive means is bent from the lower end of the damper plate and parallel to the width direction of the damper plate on the plate surface An interlocking portion formed with one long hole; A cam driver for rotating the damper plate with an eccentric shaft for reciprocating the inside of the long hole during rotation; More preferably, it includes a drive motor for rotating the cam drive.

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

1 is a perspective view of a disassembled state of the outer casing of the microwave oven according to the present invention. As shown in this figure, the microwave oven according to the present invention comprises a main body 1 and a main body 1 in which a cooking chamber 11 and a component chamber 10 are mutually partitioned by the partition wall 13. It has an outer "U" shaped outer casing 3 arranged to enclose.

The front door of the cooking chamber 11 of the main body 1 is hingedly coupled to the door 5 for opening and closing the front opening of the cooking chamber 11, and the microwave oven is operated in front of the component chamber 10 side of the main body 1. An operation panel 7 is provided. In the rear region of the cooking chamber 11 side of the main body 1, a convection heater (not shown) and a blower fan (not shown) for forced convection of heat generated from the convection heater into the cooking chamber 11 are provided.

In the component chamber 10, a magnetron 15 for outputting microwaves and supplying them to the cooking chamber 11, and a high voltage transformer 17 and a high voltage capacitor 19 for applying a high voltage to the magnetron 15 are installed. On the rear wall of the component chamber 10 in the rear region of the magnetron 15, a cooling fan 18 is installed to suck outside air and blow it toward the interior of the component chamber 10. Further, an air guide 20 is provided in the component chamber 10 in front of the magnetron 15 to guide the blowing air from the cooling fan 18 into the cooking chamber 11.

Figure 2 is an enlarged perspective view of the air guide installation region of Figure 1, Figure 3 is a perspective view of the damping device and the lighting lamp disassembled state of FIG. As shown in these figures, the air guide 20 has an inlet 21 through which the blowing air from the cooling fan 18 flows, and the blowing air introduced into the inlet 21 is discharged toward the inside of the cooking chamber 11. The outlet port 23 is formed so that it may be. The inlet 21 of the air guide 20 is opened toward the magnetron 15 so as to be located in front of the cooling fan 18 in the blowing direction, and the outlet 23 of the air guide 20 is the cooking chamber 11 and the parts. It is formed so as to surround the air passage hole 14 formed in the partition 13 which partitions the chamber 10.

On the other hand, the damping device 30 is provided in the inlet 21 region of the air guide 20. The damping device 30 is composed of a damper 31 for selectively rotating and opening the inlet 21 and a driving means 33 for rotating the damper 31.

The damper 31 is integrally bent from the lower end of the damper plate 41 and the damper plate 41 which is rotatably provided by the hinge shaft 52 on one side of the inlet 21 and the damper plate ( 41. The cam drive portion 47, which will be described later, has a linkage portion 43 formed with a long hole 53 parallel to the width direction of the damper 31. An axial through hole 25 through which the eccentric shaft 57 can be rotatably passed is formed.

The driving means 33 is coupled to the drive motor 45 installed in the lower region of the air guide 20 adjacent to the interlocking portion 43 of the damper 31 and the rotation shaft 55 of the drive motor 45 to damper. An eccentric shaft 57 integrally formed with the cam driving portion 47 is provided on the upper portion of the cam driving portion 47 so as to be spaced a predetermined distance in the radial direction of the rotation shaft 55. have. The eccentric shaft 57 is located inside the long hole 53 formed in the linkage portion 43 of the damper 31 through the shaft through hole 25 of the air guide 20, the cam drive portion 47 By reciprocating the inside of the long hole 53 during the rotation of the damper plate 41 is rotated to open and close the inlet port 21 of the air guide 20.

An illumination lamp 40 for illuminating the inside of the cooking chamber 11 is provided in the air guide 20 adjacent to the air passage hole 14. The lighting lamp 40 is composed of a lamp 42, which is a light emitting body, and a lamp socket 44 to which the lamp 42 is coupled, and the lamp socket 44 has an air guide adjacent to the air passage hole 14 ( The lamp 42 fixed to the upper surface of the 20 and coupled to the lamp socket 44 is installed in the air guide 20 through the lamp passage hole 27 formed on the upper surface of the air guide 20. It is.

With this configuration, when the operation of the microwave is started, a cooking mode using the convection heater or a cooking mode using the magnetron 15 is selectively executed by a program input to a microcomputer (not shown). In the cooking mode, the damping device 30 closes the inlet 21 of the air guide 20 to prevent the blowing air from the cooling fan 18 from being introduced into the air guide 20. At this time, a predetermined gap is formed between the damper plate 41 and the circumferential edge of the inlet 21 so that a small amount of blowing air is introduced into the cooking chamber 11 through the air guide 20, but this is a convection heater. It hardly affects the cooking process used.

In the cooking mode using the magnetron 15, the inlet 21 of the air guide 20 is opened to allow the blowing air from the cooling fan 18 to flow into the cooking chamber 11.

In this way, by providing the damping device 30 to open and close the inlet 21 of the air guide 20, the blower air from the cooling fan 18 can be effectively provided without providing a separate rubber member to the damper plate 41. It can be blocked, thereby reducing the number of parts to reduce the manufacturing cost, it is possible to shorten the assembly process to improve productivity. And by not providing the lever member in contact with the adjacent member, the device noise is not generated.

In addition, the damping device 30 is installed in the inlet 21 region of the air guide 20, and the illumination lamp 40 is provided in the air guide 20 adjacent to the air passage hole 14. There is no need to provide a separate space for the installation.

As described above, according to the present invention, there is provided a microwave oven capable of reducing parts and reducing manufacturing costs, improving productivity, preventing device noise, and making efficient use of space.

Claims (4)

A main body having a cooking compartment and a component compartment, which are insulated from each other by a partition wall formed with an air passage hole, a cooling fan installed in the component chamber, an inlet port through which blowing air from the cooling fan flows, and an outlet port communicating with the air passage hole; In the microwave oven having an air guide for guiding the blowing air to the cooking chamber, A damper installed at the air guide to open and close the inlet; Microwave oven comprising a drive means for opening and closing the damper. The method of claim 1, And an illumination lamp installed in the air guide adjacent to the outlet to illuminate the inside of the cooking chamber. The method of claim 1, The damper is, A hinge shaft fixed to one side of the inlet in a vertical direction; One side is rotatably coupled to the hinge shaft, characterized in that it has a damper plate for rotating and opening the inlet. The method of claim 3, wherein The drive means, An interlocking portion bent from the lower end of the damper plate and having a long hole parallel to the width direction of the damper plate; A cam driver for rotating the damper plate with an eccentric shaft for reciprocating the inside of the long hole during rotation; Microwave oven comprising a drive motor for rotating the cam drive.