JPH0331032Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Technical field> The present invention relates to a high frequency heating device.

<Prior art> Conventional high-frequency heating equipment cools the magnetron and high-voltage transformer, etc., which generate heat during operation, using two methods: one method uses air blowing (air blowing) using a cooling fan, and the other method uses air suction using a cooling fan. be. In the former case, as shown in FIGS. 6 to 9b, a cooling fan 3 rotated by a fan motor cools the magnetron 1, and the cooling air is guided into the heating chamber 4. The steam generated from the food that filled the heating chamber 4 is exhausted from the exhaust duct to the outside of the outer box, while the cooling air that cooled the high-pressure transformer 2 passes through the louver 6 provided on the bottom plate 5 to the outside of the outer box. Exhausted.

However, in this case, the cooling air from the cooling fan 3 is as shown in area C of FIG.
The areas with strong winds are distributed in a donut shape. Further, the cooling air does not come out straight in a direction perpendicular to the cooling fan 3, but is blown out while being twisted in the rotational direction of the cooling fan 3 (clockwise in FIG. 9a).

Since the cooling air is blown in a donut shape in this manner, a part of the air that cools the objects to be cooled in the magnetron 1 and the high-voltage transformer 2 passes around the objects to be cooled and is exhausted from the bottom plate. For this reason, the cooling effect initially expected could not be obtained.

<Purpose> Therefore, the present invention aims to provide a high-frequency heating device that can improve the internal cooling effect.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment of the present invention is shown in Figures 1 to 3.
To explain with a diagram, the high-frequency heating device of this embodiment includes a high-voltage transformer and a magnetron to be cooled, and an axial-flow type cooling fan 3 for cooling them.
and an air collecting plate 7 for concentrating the cooling air of the cooling fan 3 toward the object to be cooled, and the air collecting plate 7 is provided on the front side of the cooling fan 3 along the air blowing direction of the cooling fan 3. There is.

The metal air collecting plate 7 includes a wind collecting part 7a disposed on the front side of the cooling fan 3, a mounting part 7b continuous to the upper and lower parts of the air collecting part 7a and fixed to the outer box wall 9, and a mounting part 7b fixed to the outer box wall 9. It consists of a wind section 7a and an opening section 7e formed by inner surfaces 7c and 7d of the mounting section 7b. In this case, the size of the air collector plate 7 is determined by the outer shape of the cooling fan 3. Further, the air collector plate 7 is arranged on the outer box wall 9 with an inclination of a predetermined angle toward the rotational direction of the cooling fan 3 with respect to the vertical direction. The cooling fan 3 has four blades, and its central boss portion is connected to the outer box wall 9.
It is connected to a rotating shaft 10a of an electric motor 10 fixed to and rotatably disposed within the opening 7e. Then, the plate surface of the air collector plate 7 and the motor shaft 1
It is arranged in the same plane as 0a.

In the above configuration, when the cooling fan 3 is rotating clockwise as shown in FIG. 2 during cooling, the cooling air also flows forward while being twisted clockwise. At this time, as shown in FIG. 2, the cooling air is stopped from twisting in the clockwise direction at two locations, upper and lower, of the air collecting plate 7, which is tilted in the direction of rotation of the cooling fan 3. As a result, the wind in the blowing direction is concentrated in two areas A and B above and below the air collector plate.

Therefore, if objects to be cooled are installed in the two areas A and B, for example, a magnetron in area A and a high voltage transformer in area B, parts can be efficiently cooled.

FIG. 3 shows a second embodiment of the present invention.
The cooling fan 3 is set to rotate counterclockwise, and the air collector plate 7 is inclined in the direction of rotation of the cooling fan 3. In this case as well, air collecting areas are created in the upper and lower parts A and B of the air collecting plate 7.

Next, a third embodiment of the present invention will be explained with reference to FIGS. 4 and 5. The air collector plate 7 in this embodiment has a plurality of louver-shaped and Long hole orifice 8
A wind suction guide cylinder 11 having a and 8b is provided,
The guide tube 11 is connected to the rotating shaft 10a of the electric motor 10.
The cooling fan 3 is fitted onto the guide tube 1.
It is placed within 1. The other configurations are the same as those in the first embodiment.

In this case as well, collective cooling is performed in the same manner as in the above embodiment. Since the air collector plate 7 is disposed on the rotating shaft 10a of the electric motor 10, the installation work is easy.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may of course be modified or added within the scope of the present invention. For example, the air collector plate in the above-mentioned embodiments may be arranged on the heating chamber wall. You can.

<Effects> As is clear from the above explanation, according to the present invention, the objects to be cooled by the high-pressure transformer and the magnetron, an axial-flow type cooling fan for cooling them, and the cooling air from the cooling fan are transferred to the high-pressure transformer and the magnetron. It is equipped with a single air collector plate that divides the magnetron so that it is concentrated in two directions, and the air collector plate is arranged at a predetermined angle in order to concentrate the cooling air in two directions toward the direction of rotation of the cooling fan with respect to the vertical direction. It consists of an inclined air collection part and a mounting part for attaching the air collection part to the heating device main body, and the air collection plate part is provided on the front side of the cooling fan along the air blowing direction of the cooling fan. The cooling air from the cooling fan is divided and sent to the high-voltage transformer and the magnetron in a concentrated manner by the air collecting plate, so that the object to be cooled can be efficiently cooled.

In addition, since the transformer and magnetron are only divided into two directions by the air collecting plate, there is no need for a duct to blow air into the transformer and magnetron. It also has an excellent cooling effect.

Moreover, the air collecting part of the air collecting plate is provided only on the front side of the cooling fan, and there is no need to partition the inside of the heating device, so it can be installed without interfering with other parts. The space inside the device can be used more effectively than in the case where the heating device is small, and the heating device can be made smaller.

[Brief explanation of the drawing]

Figure 1a is a side view of the first embodiment of the present invention, Figure 1b is its front view, Figure 2 is a front view of the cooling fan when it is rotated clockwise, and Figure 3 is the second embodiment of the invention. 4 is a longitudinal sectional side view of the third embodiment of the present invention, FIG. 5 is a perspective view thereof, and FIG. 6 is a perspective view of a conventional high-frequency heating device. 7 is a vertical side view thereof, FIG. 8 is a cross-sectional plan view thereof, FIG. 9a is a front view of the cooling fan when it is rotated clockwise, and FIG. 9b is a side view thereof. 3: Cooling fan, 7: Air collector plate, 7a: Air collector,
7b: Mounting part, 7c, 7d: Inner surface, 7e: Opening, 8a, 8b: Orifice, 9: Outer box wall, 1
0: Electric motor, 11: Guide tube.

Claims (1)

[Scope of utility model registration request] A high voltage transformer and a magnetron to be cooled,
It is equipped with an axial cooling fan to cool them, and a single air collector plate that divides the cooling air from the cooling fan so that it is concentrated in two directions around the high voltage transformer and the magnetron. It consists of a wind collection part having an inclination of a predetermined angle in order to concentrate the cooling air in two directions toward the direction of rotation of the cooling fan, and a mounting part for attaching the wind collection part to the main body of the heating device. A high-frequency heating device characterized in that a wind section is provided on the front side of the cooling fan along the air blowing direction of the cooling fan.