KR100621034B1 - Cooling structure of machine parts for ventilation hooded microwave oven - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to an electrical component cooling structure of a microwave oven.

According to the present invention, the intake grill 85 into which the air to cool the electric chamber 60 is introduced, the suction of the air to cool the electric chamber 60, and the smoke and heat from the lower cooker are sucked out to the outside. A bottom plate 100 having a vent motor assembly 70 for discharging and a bottom surface of the electrical chamber 60 cooled by the operation of the vent motor assembly 70 and having an upper surface 101 stepped upward. And an electrical component mounted on the bottom plate upper surface 101 and cooled by an airflow from the intake grill 85 to the vent motor assembly 70.

According to the configuration as described above, the flow of the air flow is improved by reducing the volume of the electrical equipment chamber 60, the cooling efficiency is improved, and the reliability of the electrical components is improved.

Microwave, Electric Room, Cooling

Description

Cooling structure of machine parts for ventilation hooded microwave oven}

1 is a perspective view showing a cooling structure and an air flow path of an electric component in a conventional microwave oven.

Figure 2 is a perspective view of the cooling structure and the air flow path of the electric component according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50. Cavity 60. Battlefield

70. Vent motor assembly 71. Intake vent

75. Magnetron 77. Wave Guide

80. Wave Guide 85. Intake Grill

87. Partition Wall 88. Front Frame

89. Rear frame 90. Cross member

95. Air barrier 100. Bottom plate

101. Upper surface 103. High voltage transformer

105. High voltage capacitor T. Side

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to an electrical component cooling structure of a hood and microwave oven having improved cooling efficiency.

Various kinds of apparatuses have been proposed to date as heating apparatuses for heating foods. The most primitive heating device is a container in contact with the heat source integrated, it is possible to cook the food by putting the contents to be cooked in such a container and applying heat.

 In addition, many types of cooking apparatuses that use electric energy directly or indirectly have been developed. As an example, a microwave oven using microwaves as a heating source can be cited. A microwave oven is a cooking apparatus that generates microwaves using electricity to infiltrate a cooking object and heat the cooking object by causing molecular motion therein.

In general, a hood-use microwave oven (hereinafter also referred to simply as a microwave oven) is installed at an upper portion of the gas oven range and has a function of discharging heat or smoke generated from the gas oven range.

Microwaves, which are heating sources in such microwave ovens, are generated by components in the electrical equipment room, where heat is radiated for normal operation of devices installed in the electrical equipment room. Conventionally, a separate cooling motor is mounted on the upper side or the side of the electrical compartment to dissipate heat, but heat dissipation of the electrical compartment using the vent motor assembly is also used.

Figure 1 is a perspective view showing a cooling structure of the microwave electric cabinet as described above.

An intake grill 5, which is a passage through which external air enters, is formed at one side of the upper part of the electric chamber 7. A magnetron generating microwaves below the intake grill 5.

(8) is attached to the side surface T which partitions the cavity 10 and the electric chamber 7. In order to introduce the microwave generated from the magnetron 8 into the electric chamber 7, one end of the magnetron 8 and the other end are connected to the upper part of the cavity 10 so that the waveguide

15 is installed.

In addition, one end of the air guide 17 having an 'b' shape in order to guide the air radiating the heat of the magnetron 8 upwards and the other end of the magnetron 8 is located in the cavity 10. It is connected to the motor assembly inlet 20a.

Two vent motor assemblies 20 are installed at the upper part of the cavity 10, and the vent motor assembly 20 shown on one side discharges the air used for cooling the electric chamber 7 to the outside and the vent motor on the other side. Assembly 20 serves to discharge the heat and smoke coming from the lower cooker to the outside.

A partition wall 21 is installed at one side from the vent motor assembly 20 to the intake grill 5 to restrict the flow of the introduced air to the upper portion of the cavity 10.

On the other hand, the bottom plate formed in the bottom of the electric chamber 7, the electrical components including the high-voltage transformer 25 for generating a high pressure to generate a microwave in the magnetron (8) and a high-voltage capacitor 26 for accumulating the high voltage The magnetron 8 and the high-voltage transformer 25 generate more heat than other portions when the microwave is generated and fixed to the 30.

The flow of air in the electrical equipment room 7 configured as described above is as follows.

As the vent motor assembly 20 sucks the surrounding air and discharges it to the outside, the inside of the microwave oven is in a low pressure state, whereby the outside air is introduced through the intake grill 5. The introduced air is formed in a straight air flow toward the vent motor assembly inlet (20a), and part of the heat dissipates the magnetron (8) attached to the side (T) of the electric chamber 7, the other part of the air Flow dissipates electrical components such as the high voltage transformer 25 and the high voltage capacitor 26 mounted on the bottom plate 30 forming the bottom of the electric chamber 7.

The heat radiating the magnetron (8) is sucked into the vent motor assembly inlet (20a) located in the upper side of the electrical chamber (7) through the air guide 17 is discharged to the outside, the lower portion of the electrical chamber (3) The air that radiates the electrical components is lifted to the upper portion and is sucked into a part of the intake port 20a which is not covered by the air guide 12 and discharged to the outside.

However, the conventional electrical compartment 7 cooling structure has the following problems.

The flow path is formed to be relatively longer than the air flow that enters the exhaust motor assembly through the intake grill when cooling the electrical components mounted on the bottom plate forming the bottom of the electrical compartment. For this reason, the speed of the air path becomes small due to friction with air or parts formed in the electric chamber 7, and thus a smooth cooling action does not occur.

In addition, a straight air flow directed toward the vent motor assembly 20 in the air flow formed by the air introduced through the intake grill 5 is discharged to the outside without cooling the electrical components mounted below and is relatively small. Airflow will cool the electrical compartment (7). This causes a decrease and loss of cooling efficiency.

Due to the reduction in cooling efficiency and the loss of airflow caused by the above-listed reasons, heat dissipation of the electric components mounted in the electric compartment 7 may not occur smoothly. This may cause a problem in the reliability of the electrical component due to overheating.

In addition, in order to solve the reliability problem of the electric component due to the overheating, the electric component is manufactured to reduce the amount of heat generated, thereby increasing the manufacturing cost of the electric component.

In addition, by increasing the speed of the vent motor assembly 20 to accelerate the air flow to dissipate the lower portion of the electric chamber 7, wherein the vent motor assembly

Noise generation and power consumption by the speed of 20 is increased.

Accordingly, an object of the present invention is to solve the conventional problems as described above, to maximize the cooling efficiency of the electric component to provide a cooling component for the electric component of the microwave oven to improve the reliability of the electric component.

Another object of the present invention is to provide a hood-use microwave oven cooling structure in which the manufacturing cost is reduced because heat dissipation of the electric component is smooth, so that heat resistance is not taken into consideration when manufacturing the electric component.

It is still another object of the present invention to provide a cooling device for an electric component of a microwave oven having a low noise and a low power consumption by reducing the rotational speed of the vent motor when operating to obtain the same cooling force as before. .

In order to achieve the above object, the electric component cooling structure of the microwave oven according to the present invention includes an intake grill into which air for cooling the electric chamber is introduced, an intake of air for cooling the electric chamber, and a lower cooker. A bottom plate having a vent motor assembly that sucks up smoke and heat and discharges it to the outside; It is mounted to the upper surface of the plate and consists of electrical components that are cooled in the air flow from the intake grill to the vent motor assembly.

A plate-shaped air blocking film is installed between the intake grill and the vent motor in order to induce the air flow from the intake grill toward the vent motor assembly downward.

According to the present invention having such a configuration, the cooling efficiency of the electrical component is improved by reducing the volume of the electrical equipment chamber and shortening the flow path of the airflow.

Hereinafter, a preferred embodiment of the present invention as described above will be described in detail with reference to FIG. 2.

The cavity 50 in which the food is cooked and the electric compartment 60 in which the electric component is mounted are partitioned by the side surface T. As shown in FIG. A vent motor assembly 70 having a hood function and an electric compartment cooling function is installed at one side of the upper surface of the cavity 50. The vent motor assembly 70 has an inlet port 71 formed at both ends to suck in ambient air.

And the magnetron 75 which generate | occur | produces a microwave is provided in the electric chamber side T. As shown in FIG. Wave guide for guiding the microwave into the cavity 50

One end 77 is connected to the magnetron 75 and the other end is connected to the cavity 50.

 An air guide (80) for guiding the heat dissipated air of the magnetron (75) to the vent motor assembly (70) is connected to one side of the magnetron (75) and the other end of the vent motor assembly inlet (71). .

The vent motor assembly is formed with a plate-shaped partition wall 87 formed on the upper surface of the cavity 50 from the vent motor assembly 70 to the intake grill 85 formed on the upper surface of the electric chamber 60.

The airflow toward 70 does not flow to the upper surface of the cavity 50. In addition, a transverse member 90 is mounted between the front frame 88 and the rear frame 89 at the upper part of the electric chamber 60, and from one side of the vent motor assembly 70 to the transverse member 90. A plate-shaped air barrier film 95 is provided.

In addition, the bottom plate 100 forming the bottom of the electric chamber 60 has an upper surface 101 formed to be stepped upward, and the upper surface 101 includes a high voltage transformer 103 and a high voltage capacitor 105, and the like. Electronic components are mounted.

The bottom plate 100 is an embodiment of the present invention, the shape is of course possible to deform within the range to smooth the flow of air flow to cool the electrical components by reducing the volume of the electrical chamber 60.                     

In the embodiment of the present invention configured as described above, the flow of air is as follows.

By operating the vent motor assembly 70, the air pressure inside the electric chamber 60 is lowered by sucking and discharging the air around the intake port 71 to the outside. As a result, outside air flows into the upper part of the electric chamber 60 through the intake grill 85. The introduced air flows downward by the partition wall 87 and the air barrier layer 95 to cool the electric parts mounted on the magnetron 75 and the bottom plate upper surface 101.

The air cooled by the magnetron 75 is sucked into the vent motor assembly inlet 71 through the air guide 80 and discharged to the outside. In addition, the air that cools the electric component mounted on the bottom plate upper surface 101 rises to the upper part of the electric chamber 60 and is sucked into a part of the intake port 71 that is not covered by the air guide 80 to the outside. Is discharged.

As described above, according to the embodiment of the present invention, the electrical equipment is mounted on the upper surface 101 in which the bottom plate 100 forming the bottom surface of the electrical equipment chamber 60 is stepped upward. The volume of is reduced. As a result, the length of the air flow path for cooling the electric component is reduced, thereby reducing the resistance due to air or fittings in the electric chamber 60 against the air flow. In addition, the airflow flows through the electric chamber 60 having a reduced volume compared with the related art, thereby increasing the wind speed and the air volume.

In addition, a straight air flow from the intake grill 85 to the vent motor assembly 70 is blocked by the air blocking membrane 95 installed on the transverse member 90 at one side of the vent motor assembly 70 to flow downward. Will be guided. As a result, the airflow of the airflow cooling the lower electric component is minimized by minimizing airflow loss.

For these reasons, the flow of the airflow for cooling the electric parts is smooth, thereby preventing defects of the electric parts due to high temperature, thereby improving the reliability of the electric parts.

In addition, the rotation speed of the vent motor assembly 70 is reduced by the improved airflow when the vent motor assembly 70 is operated to obtain the same cooling force as in the related art, thereby achieving a low noise structure and having low power consumption.

In addition, in the manufacture of electrical components such as the high-voltage capacitor 105 and the high-voltage transformer 103, in order to reduce heat generation due to resistance in the past, the material cost was increased by a heat-resistant structure including increasing the wire diameter of the coil. For example, since the cooling of the electrical component is smooth, the material cost of the electrical component due to the reduction of the coil wire diameter is reduced.

As described above, the present invention is smoothly flowed by the flow of the air flow to cool it by being mounted on the bottom plate upper surface 101, the electrical components including the high voltage transformer 103 and the high voltage capacitor 105 is stepped upward. It is a technical point that the cooling efficiency of components improves.

Many other modifications based on the present invention will be possible to those skilled in the art within the scope of the above.

 As described above, according to the present invention, the cooling efficiency of the electric component is improved by the smooth air flow, thereby improving the reliability of the electric component.

In addition, when operating to obtain the same cooling power as in the prior art, the rotation speed of the cement motor is reduced, resulting in a low noise structure, and low power consumption.

In addition, since the heat resistant material does not have to be used in the structure of the electric component, the material cost of the electric component is reduced.

Claims (2)

An intake grill into which air to cool the battlefield flows, A vent motor assembly that sucks air to cool the electric compartment, sucks smoke and heat from a lower cooker and discharges it to the outside; A bottom plate which forms a bottom surface of the electric compartment that is cooled by the operation of the vent motor assembly, and has an upper surface formed to be stepped upward; And an electrical component mounted on the bottom plate and cooled in an air flow from the intake grill to the vent motor assembly. The electronic component of claim 1, further comprising an air barrier layer disposed between the intake grill and the vent motor to direct the air flow from the intake grill toward the vent motor assembly. Cooling structure.

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