JPH01221881A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To improve the cooling function by cooling a magnetron to feed high-frequency waves to a heating chamber, a high voltage transformer, and a control electron circuit, in a spray cooling by a cross flow fan, making no branching flow. CONSTITUTION:Simultaneously to the high-frequency oscillation, a cross flow fan motor 19 is rotated to suck the outer air from a suction hole 22 at the rear side of the outer block 20, and an inverter transformer 23 and a control circuit 24 of the inverter transformer 23 are cooled. Then, the cooling air is collected by an air guide 27, the cooling air flows to a magnetron 25 concentri cally, cools further a control circuit 28 of a high-frequency heating device at the upper side of the heating chamber, and it is exhausted from an exhaust hole 29 at the rear side of the outer block 20. Since the cooling air is in a spray cooling including no branch flow, the wind amount received from the cross flow fan 19 is not reduced. The cooling performance is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cooling structure for a high frequency heating device.

2. Description of the Related Art In the conventional structure diagram, for example, shown in FIG. 3, which is a partial cross-sectional view of the right side showing the cooling structure of a high-frequency heating device, the rotation of the cooling fan motor 1 causes the air intake hole 3 provided on the rear surface of the outer shell 2 and the outer shell 2 to Outside air enters the enclosure 2 as shown by the arrow through an intake hole (not shown) provided at the rear of the right side of the housing, cools the high-voltage transformer 4, and is exhausted to the outside through an exhaust hole 7 at the bottom of the enclosure 2. Ru.

A part of the cooling air that has cooled the high-voltage transformer 4 cools the electronic circuit 8 that controls the operation of the high-frequency heating device, and is exhausted to the outside through the exhaust hole 7 on the bottom of the outer shell 2. 1, the intake hole 3 is provided on the rear surface of the outer shell 2.
Outside air enters the inside of the housing 2 as shown by the arrow from an intake hole (not shown) provided at the rear right side of the housing 2, cools the magnetron 6, passes through the air guide 6, and enters the inside of the heating chamber 9. The air enters the heating chamber 9 and is exhausted to the outside of the outer shell 2 from the left rear surface (not shown) of the heating chamber 9. In addition, the conventional method shown in FIG. 4, for example,
In the structural diagram of the right side partial cross-section showing the cooling structure of the high-frequency heating device, air flow (arrow) occurs when outside air is sucked into the outer shell 12 around the high-voltage transformer 11 from the intake hole 13 by the rotation of the cooling fan motor 10. After the high voltage transformer 11 is cooled, the cooling air cools the magnetron 14, passes through the air guide 16, enters the heating chamber 16, and exits the outer shell 12 from the left rear surface (not shown) of the heating chamber 16. Exhausted. Further, a part of the cooling air that has cooled the high voltage transformer 11 cools the electronic circuit 18 without cooling the magnetron 14, and is exhausted from the exhaust hole 17 at the bottom of the outer shell 12.

Problem to be Solved by the Invention However, in cooling such a high-frequency heating device, in the case of the cooling structure shown in FIG. However, the cooling air is supplied by the high voltage transformer 4,
In order to cool the magnetron 6, the air volume is largely divided into two, and the capacity of the cooling fan motor 1 is halved, so the rotation speed of the cooling fan motor must be increased or the fan must be made larger. Further, in the cooling structure shown in FIG. 4, after the high voltage transformer 11 is cooled by the air drawn in by the cooling fan motor 10
Most of the cooling air can be cooled by blowing the magnetron 14 at o, but the high voltage transformer 11 is cooled by suction, so there are intake holes 1 around the high voltage transformer 11.
3, the high voltage transformer 11 would be difficult to cool, and the number of intake holes 13 would be limited to the area around the high voltage transformer 11, making it difficult to improve the cooling performance.

The present invention solves these conventional problems, and aims to improve the cooling capacity of a high-frequency generator with a simple configuration.

Means for Solving the Problems In order to achieve the above object, the high-frequency heating device of the present invention includes a magnetron that supplies high-frequency waves to a heating chamber, a high-voltage transformer that supplies power to the magnetron, and cooling of an electronic circuit that controls the operation of the high-frequency heating device. is a configuration in which the cross-flow fan blows cooling air and does not separate the cooling air.

Function The high-frequency heating device of the present invention performs cooling with a cross-flow fan motor, and cools the high-voltage transformer, Macnetron, and electronic circuit of the high-frequency heating device by blowing cooling air.Since the cooling air is not divided, the high-voltage transformer,
Since the amount of cooling air blown by the magnetron onto the electronic circuit does not decrease, the cooling performance is improved compared to the conventional method.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, it is a partial cross-sectional perspective view showing the cooling structure of the high-frequency heating device of the present invention, where 19 is a cross-flow fan motor, 2o is the rear surface of the outer shell, and there is an inlet 21 of the cross-flow fan motor 19. An intake hole 22 is provided on the surface facing the. 23 is an inverter transformer, 24 is a control circuit for the inverter transformer 23, 26 is a magnetron, 26 is a high-voltage capacitor, 2 is an air guide, and at the same time as high frequency oscillation, the cross 70-fan motor 19 rotates and the air intake hole on the rear surface 2o of the outer shell is generated. After drawing in outside air from 22 and cooling the inverter transformer 23 and the control circuit 24 for the inverter transformer, the air guide 27 collects the cooling air, and the cooling air is concentrated at the magnetron 26 and flows to the control circuit for the high-frequency heating device on the top surface of the heating chamber. 28 is cooled and exhausted from the exhaust hole 29 on the rear surface 20 of the outer shell. In this way, the cooling air is blown for cooling purposes, and since there is no branch flow, the amount of air received from the cross-flow fan 19 does not change, so the cooling performance is improved.

Effects of the Invention As described above, the high frequency heating device of the present invention provides the following effects.

(1) Cooling air is sprayed to cool the high-voltage transformer, and then all the cooling air is collected by an air guide, then the magnetron is cooled, and after further cooling the magnetron, the electronic circuit is cooled to achieve efficiency without heat loss. It can cool high-frequency heating equipment with good performance.

(2) By using a cross-flow fan motor to take in and exhaust the cooling air of the high-frequency heating device, the block of the high-frequency generator unit can be made smaller, resulting in a space-saving design. Since there is no need to take up space, it can be installed in close contact with the wall of the main installation location, such as the kitchen, except for the rear surface of the outer shell, allowing the kitchen to be used more widely.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional perspective view of a main part of a high-frequency heating device that is an embodiment of the present invention, FIG. 2 is a rear external perspective view of the same high-frequency heating device, and FIGS. 3 and 4 are high-frequency heating devices showing conventional examples. FIG. 19...Cross flow 7 unmotor, 20...
...Rear surface of the outer shell, 21...Intake port of the river/cross flow fan motor, 22...Intake hole on the rear surface of the outer shell, 2
3... Inverter transformer, 24...
Inverter transformer control circuit, 26...Magnetron, 26...High voltage capacitor, 27...River/air guide, 28...Control circuit for high frequency heating device, 29... ...Outer shell rear exhaust hole.

Claims (2)

[Claims] (1) a heating chamber that stores an object to be heated, a magnetron that supplies high frequency waves into the heating chamber, a high-voltage transformer that supplies power to the magnetron, an electronic circuit that controls the operation of the high-voltage transformer, and the magnetron; 1. A high-frequency heating device comprising a cooling fan motor for cooling a high-voltage transformer and an electronic circuit, and an air guide, the air guide being characterized in that the air guide does not cause shunting due to cooling air blown by the cooling fan motor. (2) The high-frequency heating device according to claim 1, wherein the cooling fan motor of the high-frequency heating device is a cross-flow fan motor.