JPS62272495A - Radio frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Industrial Application Field The present invention is a high-frequency heating device, in particular a shaft-type turntable system, in which the turntable is rotated by the rotary shaft of a motor directly through a hole in the bottom of the heating chamber. This concerns the safety of the structure.

BACKGROUND OF THE INVENTION FIG. 4 shows a cross-sectional view of a high-frequency heating device, which is an example of a conventional technique. In the figure, reference numeral 1 denotes a heating chamber in which food is stored and heated, and a door 2 is provided in front of the heating chamber so that it can be opened and closed. 3
is a magnetron that supplies high frequency waves to the heating chamber 1. The high frequency waves oscillated from the magnetron 3 pass through a waveguide 4, and are irradiated onto an object to be heated 6 placed on a rotating plate 5 in the heating chamber 1, thereby heating it. . The rotating plate 5 is placed on a rotating mounting table 7. The rotary mounting table 7 is fitted onto a rotary shaft 9 of a motor 8 passing through an opening provided at the bottom of the heating chamber 1, and is rotated. The opening provided at the bottom of the heating chamber 1 is raised one step higher. The load in the thrust direction applied to the rotating shaft 9 of the motor 8 is received by the motor mounting plate 10 so that no force is applied to the gears inside the motor 8.

FIG. 5 is an enlarged view of the mounting portion of the motor 8.

A heat insulating board is provided between heating chamber 1 and motor 8'.

If the rotating shaft 9 of the motor 8 and the heat insulating plate 11 come into contact with each other, there will be resistance to rotation, so a certain amount of clearance should be provided.

The problem that the invention seeks to solve In the case of such a configuration, there are the following disadvantages.

The rotating mounting table 7 is detachably attached to the rotating shaft 9 so that the bottom surface of the heating chamber 1 can be easily cleaned. If you continue cleaning with the rotary mounting table 7 removed, a large amount of water, detergent, etc. will leak through the through hole at the bottom of the heating chamber 1 and the rotary shaft 9 of the motor 8 will be pushed into the gap between the rotary shaft 9 and the heat insulating plate 11. 8, which not only adversely affects the quality and durability of the motor 8, but also deteriorates its insulation performance, increasing the risk of electric shock and fire.

The present invention solves these conventional problems, and aims to improve motor failure, durability, and safety.

Means for Solving the Problems In order to achieve the above object, the high-frequency heating device of the present invention has one end of the heat insulating plate larger than the outer diameter of the motor, and a portion extending from the part through which the rotating shaft passes through to one end larger than the outer diameter of the motor. The part of the heat insulating board through which the rotating shaft penetrates is raised toward the heating chamber, and the external shape of the elastic washer, which is press-fitted into the two rotating shafts, is made larger than the raised part. , and the lower part of the heat insulating plate is larger than the outer shape of the elastic washer.

Function The high-frequency heating device of the present invention has an elastic washer press-fitted into the rotating shaft even if water, broth, etc. flows along the rotating shaft, so there is no gap between the rotating shaft and the washer, and everything is removed from the outer shape of the washer. Flows down onto the insulation board. Also, since the outer shape of the washer and the whole insulation board are larger, the outer shape of the lower constriction part is larger, so water flows all the way to the lower part and prevents water from splashing on the motor. Note that although the elastic washer press-fitted into the rotating shaft is in contact with the heat insulating plate, no pressure is applied to the contact surface, so there is almost no resistance when the rotating shaft rotates. Therefore, it has the effect of improving quality, durability, and safety.

Embodiment One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross-sectional view of a high-frequency heating device that is an embodiment of the present invention. In the figure, reference numeral 1 denotes a heating chamber in which food is stored and heated, and a door 2t is provided in front of the heating chamber so that it can be opened and closed.

3 is a magnetron that supplies high frequency waves to the heating chamber 1. The high frequency waves oscillated from the magnetron 3 pass through a waveguide 4 and are irradiated onto the object to be heated 6 placed on a rotating plate 5 in the heating chamber 1, thereby heating it. do. The rotating plate 5 is placed on a rotating mounting table 7.

``The rotating mounting table 7 is fitted onto the rotating shaft 9 of the motor 8, which passes through an opening provided at the bottom of the heating chamber 1, and is rotated once. The load in the thrust direction applied to the rotating shaft 9 of the motor 8 is received by the motor mounting plate 10.

FIG. 2 is a cross-sectional view of the main parts of a high-frequency heating device that is an embodiment of the present invention. 7. A heat insulating plate 11 is provided between the JO heat chamber 1 and the motor 8, and the part through which the rotating shaft 9 of the motor 80 passes through the heat insulating plate 11 is raised into the heating chamber 1 to form a raised part 11 af:. ing.

Reference numeral 12 denotes an elastic washer whose inner diameter is made smaller than the diameter of the rotary shaft 9 and press-fitted therein. The outer shape of the elastic washer 12 is made larger than the diameter of the raised portion 11a of the heat insulating plate 11, and the elastic washer 12 is pressed against the raised portion 11a.

According to the above configuration, if water is accidentally spilled from the opening provided at the bottom of the heating chamber 1, the water will flow along the rotating shaft 9 and onto the elastic washer 12. Since the rotating shaft 9 and the elastic washer 12 are press-fitted, water will flow through the elastic washer 12.
The water flows down onto the heat insulating plate 11 from the outer periphery. A part of the heat insulating plate 11 is made larger than the outer diameter of the motor 8, and a part of the heat insulating plate 11 larger than the outer diameter of the motor 8 from around the rotating shaft 9 is made lower than other parts, so that water does not come into contact with the motor 8. I have to. The lower tip of the heat insulating plate 11 is tapered lower than the tip. As a result, the water that had accumulated on the insulation board is completely washed away due to surface tension.

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

(1) Even if water flows in through the through hole provided on the bottom of the heating chamber, the structure of the drain plate and insulation plate prevents water from adhering to the motor, providing a safe high-frequency heating device with no risk of ground faults, etc. can.

(21) A highly reliable high-frequency heating device can be provided without worrying that viscous broth or the like will flow into the motor from the rotating shaft and become lumpy inside the motor, locking the gears and causing rotational problems.

(3) Since it can be directly rotated by the rotating shaft of the motor, there is no need for a rotating shaft and gears for transmitting the rotation of the motor to the rotating shaft, which also leads to lower prices.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a high-frequency heating device that is an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same essential part, and Fig. 3 is a sectional view of the same.
Heating chamber, 7...Rotating table, 8...Motor, 9...Rotating shaft, 11...Insulating plate, 12... elastic washer. Name of agent: Patent attorney Toshio Nakao and 1 other person11
-Danseizaka No. 1 Figure 12- Tebei/
Distance washer Fig. 2 σ Fig. 3

Claims (1)

[Claims] A heating chamber for storing an object to be heated, a heating means for heating the object to be heated, a rotating mounting table for placing the object to be heated in the heating chamber, a motor for driving the rotating mounting table, and a motor for driving the rotating mounting table. comprising a heat insulating plate for heat insulation and an elastic washer having an inner diameter smaller than the diameter of the rotating shaft of the motor,
A part of the heat insulating board is made larger than the outer diameter of the motor, and a part of the heat insulating board from the part through which the rotating shaft passes through to a part larger than the outer diameter of the motor is lower than other parts, and the rotating shaft of the heat insulating board is The penetrating part forms a raised part toward the heating chamber side, and an elastic washer larger in diameter than the raised part is press-fitted onto the rotating shaft and positioned at the tip of the raised part, and the outer shape of the elastic washer is The high frequency heating device has a structure in which the lowered portion of the heat insulating plate is larger.