JPH0145110Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a microwave oven, and more particularly to a microwave oven configured so that air generated by the centrifugal force of a cooling fan for cooling a high-voltage transformer, magnetron, etc. is sent directly into a heating chamber.

<Prior art> In a typical microwave oven, air cooled by a high-voltage transformer, magnetron, etc. is sent into the heating chamber, and the steam generated from the food during cooking is discharged outside the heating chamber. The screen glass in the viewing window in the center is designed to prevent it from fogging up.

However, since a ventilation duct is provided to send air that cools the high-voltage transformer, magnetron, etc. into the heating chamber, the ventilation path structure is complicated and costly, and there is room for improvement. .

<Purpose> The present invention was developed in view of the above, and is configured to directly send air generated by the centrifugal force of a cooling fan that cools high-voltage transformers, magnetrons, etc. into the heating chamber, thereby eliminating the need for air blowing in the past. The purpose is to eliminate ducts, simplify the ventilation route structure, and reduce costs.

<Example> Hereinafter, an example of the microwave oven of the present invention will be described based on the drawings. FIG. 1 is a side sectional view of a main part of the microwave oven of the present invention, and FIG. 2 is a front sectional view taken along the line A-A' in FIG. In the figure, 1 is a high-pressure transformer, 2 is a magnetron, and 3 is a propeller-shaped cooling fan. As shown by the arrow in Figure 1, air is sucked in through air intake holes 4 provided around the high-pressure transformer 1, and the rear panel Air is discharged to the outside of the aircraft from the air exhaust hole 6 provided in the heating chamber 7 to cool electrical components such as the high voltage transformer 1 and the magnetron 2. The steam generated from the food during cooking is sent into the heating chamber from the air supply section 8 formed by drilling, and the steam generated from the food is sent to the outside of the machine through the exhaust section 9 and exhaust duct 10 formed by drilling the ceiling wall of the heating chamber. It is something that is discharged. 11 is a fan motor for rotating the cooling fan 3; 12 is an orifice plate that partitions the air intake side and the air supply side of the cooling fan 3; and 13 is a turntable disposed at the bottom of the heating chamber.

In the above configuration, the air flow (wind) generated by the centrifugal force of the cooling fan 3 and sent into the heating chamber 7 from the air supply section 8 is generated when the rotation direction of the cooling fan 3 is the direction shown in FIG. , the flow will flow toward the bottom of the heating chamber, and if the rotation direction of the cooling fan 3 is in the direction, the flow will flow along the ceiling wall of the heating chamber.

If the airflow (wind) is made into a flow, the steam generated from the food 14 placed on the turntable 13 will be mixed with the airflow (wind) and efficiently discharged to the outside of the machine. The screen glass (not shown) of the viewing window is less likely to fog up, but if the flow is reversed, the airflow (wind) will be short-circuited, and the steam will be trapped inside the heating chamber, causing the viewing window to become cloudy. There is a problem with the screen glass fogging up. Therefore, the direction of rotation of the cooling fan 3 is preferably set as follows.

As mentioned above, since the configuration is such that the air generated by the centrifugal force of the cooling fan 3 is sent directly into the heating chamber, it is possible to eliminate the air duct for sending air into the heating chamber, which was conventionally necessary, and the air passage structure is simplified. Cost reduction can be measured by doing so.

<Effects> Since the microwave oven of the present invention has the above-mentioned configuration, it is possible to eliminate the blower duct for sending air into the heating chamber, which was conventionally required, and the cost can be reduced by simplifying the blower path structure. can be measured.

In addition, since the air flowing in the direction perpendicular to the axial direction of the cooling fan is blown toward the bottom of the heating chamber, a small amount of the air blown by the cooling fan is guided into the heating chamber, causing heating due to the inflow of air. It prevents the indoor temperature from dropping, does not affect the finished state of the food, and prevents the screen glass of the viewing window from fogging up during cooking. It is of high practical value.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a main part of the microwave oven of the present invention, and FIG. 2 is a front sectional view taken along the line A-A' in FIG. Code, 1: High voltage transformer, 2: Magnetron,
3: cooling fan, 7: heating chamber, 8: air supply section.

Claims (1)

[Scope of utility model registration request] A hole is provided in the side wall of the heating chamber to guide wind flowing in a direction perpendicular to the axial direction of a cooling fan that cools the high voltage transformer, magnetron, etc. to the heating chamber, and the cooling fan is provided in the side wall of the heating chamber and the A microwave oven characterized in that the direction of rotation of the cooling fan is set so as to blow air toward the bottom of the heating chamber.