JPH05231646A - High frequency heating device equipped with heater - Google Patents

Abstract

PURPOSE:To provide a high frequency heating device with favorable serviceability by facilitating the parts replacement of a circulation fan, circulation fan motor, cooling fan and cooling fan motor. CONSTITUTION:A circulation fan 10, circulation fan motor 11, cooling fan 15, and cooling fan motor are attached on a rear plate 20, and the rear plate 20 and a bottom plate 12 are rotatably attached for the constitution. By this method, by simply removing machine screws on the rear plate, major electric components including the parts can be easily replaced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating device with a heater, and more particularly to a circulation fan provided for agitating the inside of a heating chamber during heating by a heater, a drive motor for the same, a cooling fan for electric parts, and an attachment for the drive motor It is about structure.

[0002]

2. Description of the Related Art A conventional high-frequency heating device with a heater of this type will be described with reference to the drawings.

FIG. 6 shows a conventional example of a heating chamber according to the present invention. As shown in FIG. 6, the waveguide 3 is provided on the side surface of the heating chamber 32.
A magnetron 37, which is a high-frequency heating means, is connected via 6, and the object to be heated is heated by high-frequency heating by the magnetron 37 or convection and radiant heating by a sheath heater provided above the heating chamber 32. The rear surface of the heating chamber has bunching (a large number of holes), and a circulation fan for stirring hot air in the heating chamber and a unit circulation fan of the circulation fan motor 34, which is a drive motor thereof, are provided behind the heating chamber 32 when the heater is heated. The unit 33 was configured and directly attached to the heating chamber 32 from behind by screws. Further, the cooling fan 39 and the cooling fan motor 40, which are electric components, are mounted on the mounting plate 41, and the mounting plate 4 is mounted on the bottom plate 38 and the back plate 33 with screws.

[0004]

However, in this configuration, when the circulation fan and the circulation fan motor 34 are to be replaced, the bottom plate 38 is removed, and the high frequency heating device is laid down with the front face down, and the circulation fan unit 3 is rotated.
3 must be removed, the circulation fan unit 33 must be removed, and the circulation fan and the circulation fan motor 34 must be replaced. As described above, in the conventional configuration, it takes a long time to replace the circulation fan motor.
Further, the cooling fan 39 and the cooling fan motor 40 for cooling the electric parts must be loosened and tightened in a narrow place due to the magnetron 37, the high voltage transformer 42, etc., and it was very difficult to replace the parts.

In particular, in a high-frequency heating apparatus having a heating chamber coated with enamel, it is necessary to simplify the shape in order to prevent deformation due to high temperature during baking of the enamel, and it is very difficult to replace parts. It was a problem.

Therefore, an object of the present invention is to facilitate replacement of electric parts such as a circulation fan, a circulation fan motor, a cooling fan, and a cooling fan motor of a high-frequency heating device with a heater, that is, improve serviceability.

[0007]

To achieve the above object, the present invention provides, as a first means, a circulation fan, a circulation fan motor and a cooling fan, and a cooling fan motor as a unit integrated with a back plate. The plate unit and the bottom plate of the high frequency heating device are rotatably connected.

As a second means, the back plate unit and the bottom plate of the high frequency heating device are rotatably coupled, and the back plate unit and the high frequency heating chamber are connected by a wire.

As a third means, a heating chamber support plate is provided on the bottom plate of the high frequency heating device. As a fourth means, the back plate unit and the bottom plate of the high-frequency heating device are rotatably connected to each other by an L-shaped bottle whose one end is inserted into a recess (throttle portion) of the bottom plate.

[0010]

By using the first means according to the present invention, the circulation fan and its related parts and the cooling fan and its related parts of the high frequency heating device can be easily replaced without removing the bottom plate.

Further, when the second means is used, in addition to the effect described in the first means, when the circulating fan of the high-frequency heating device and its related parts and the cooling fan and its related parts are replaced, they are temporarily fixed by wires. Therefore, the parts can be replaced more easily.

Further, when the third means is used, the heating chamber is supported by the heating chamber support plate even if the back plate unit is detached from the heating chamber, so that the circulating fan and its related parts can be prevented from falling over. The cooling fan and its related components can be removed.

Further, when the fourth means is used, the back plate unit and the bottom plate of the high frequency heating device can be rotatably constituted by a simple method and can be easily assembled at the time of production.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a door 2 is provided on the front plate 1a of the heating chamber 1 so that it can freely rotate about a fulcrum. Further, a magnetron 4 which is a high frequency heating means is coupled to a side surface of the heating chamber 1 via a waveguide 3.
The object to be heated 5 is heated by high frequency heating by the magnetron 4 or convection and radiant heating by the upper sheath heater 6 (FIG. 2).

FIG. 2 is a cross-sectional view of FIG. 1, and on the bottom surface of the heating chamber 1, there is a pan support 7 for holding the object to be heated 5, a turntable 8 for holding and rotating the pan support 7, and this turntable 8. A turntable motor 9 for driving the motor is constructed. Further, the rear surface of the heating chamber 1 has a punched rear plate 1d.
A circulation fan 10 for stirring the air inside the refrigerator in order to make the temperature inside the refrigerator uniform when the heater is heated, and a circulation fan motor 1 for driving the circulation fan.
1 is configured. A circulation fan case 19 is formed around the circulation fan 10 to prevent hot air from escaping to the outside. A sheathed heater 6 for heating the object to be heated 5 is formed in the upper part of the heating chamber 1.

FIG. 3 is an exploded view of the inside of the high-frequency heating apparatus. A magnetron 4 as high-frequency heating means is connected to the side surface of the heating chamber 1 via a waveguide 3. The rear plate 1d of the heating chamber is provided with punching as described above, and the circulation fan 10, the circulation fan motor 11, and the circulation fan case 19 are formed on the rear surface of the heating chamber 1, and the cooling fan 15 and its related components are provided. Together, they are integrated by the back plate 20. The integrated back plate unit is attached to the rear surface of the heating chamber 1 with screws. The back plate 20 is connected to the heating chamber 1 by the wire 16. A bottom plate 12 is provided below the heating chamber 1, and a high voltage transformer 18 for supplying a high voltage to the magnetron 4 and a heating chamber support plate 17 for supporting the heating chamber are attached to the bottom plate 12 by screws. The bottom plate 12 and the back plate 20 are rotatably connected by a bottle 13. The bottom plate 12 and the heating chamber 1 are connected to the front plate 1a of the heating chamber by screws.

FIG. 4 shows the structure of the joint between the bottom plate 12 and the back plate 20. The vertical part of the L-shaped coupling bin 13 is inserted into the hole of the bottom plate 12 and the back plate 20, and the horizontal part of the bottom plate 12 is inserted. It engages with the diaphragm 14. The throttle portion 14 of the bottom plate is covered with the outer case 43 (FIG. 1) to prevent the coupling bin 13 from coming off.

FIG. 5 is an exploded view showing the structure of the back plate unit. The circulation fan motor 11 is attached to the motor mounting plate 23 with screws, and the motor mounting plate 23 is fixed with screws so as to sandwich the back plate 20 together with the circulation fan case 19. The circulation fan 10 is a circulation fan motor 11
It is attached to the shaft of. Further, a self-cooling fan 22 for cooling the circulation fan motor 11 is attached to the shaft of the circulation fan motor 11, and a spacer 21 is provided in order to prevent the displacement between the circulation fan and the self-cooling fan. A cooling fan motor 25, a cooling fan 15, and a fan case 24, which are electric components, are attached to the back plate 20. Further, the fan case 24 is provided with a noise prevention filter 31, a fuse 26, a fuse holder 27, a high voltage diode 30, a high voltage condenser 28 mounted by a mounting plate 29, and the like.

[0020]

As described above, the following effects can be obtained in the high frequency heating apparatus according to the first aspect.

(1) Electrical components such as a circulation fan, a circulation fan motor, a cooling fan and a cooling fan motor provided on the rear surface of the heating chamber can be easily replaced from the rear surface without disassembling the bottom plate.

(2) Since the vibration sources such as the circulation fan motor and the cooling fan motor are concentratedly attached to the thick back plate, it is possible to prevent abnormal noise from being generated and to provide a quiet high-frequency heating device. be able to.

(3) Since the cooling fan motor is attached to the back plate, the cooling effect of the back plate is great, and the temperature of the back plate portion which may be touched by the user can be lowered, thus providing a safe high-frequency heating device. Can be provided.

In the high frequency heating apparatus according to the second aspect, the following effects can be obtained. (1) In addition to the effect of the first aspect, since the unit of the circulation fan is temporarily fixed by the wire, the disassembling work becomes easier.

(2) Since the wire is made of metal or electric wire, the back plate unit to which many electric parts are attached is surely grounded, and the ground is maintained even when disassembled. It is also possible to replace parts and perform a temporary operation check before attaching the unit to the main body, and it is possible to provide a safe and service-friendly high-frequency heating device.

In the high frequency heating apparatus according to the third aspect, the following effects can be obtained. (1) Even if the circulation fan and the unit of the back plate are removed from the heating chamber, the heating chamber is supported by the heating chamber support plate, so that the circulation fan unit can be removed without inverting the high frequency heating device.

(2) Since the shape of the heating chamber can be simplified, an inexpensive structure can be provided. Particularly, in a heating chamber to which enamel processing is applied, the temperature becomes high when baking is performed during the enamel processing. Even if it is exposed, the heating chamber is not thermally deformed, the adhesion with the circulation fan case can be improved, and efficient heating characteristics can be provided.

Further, in the high frequency heating apparatus according to the fourth aspect, the following effects can be obtained. Since the circulation fan unit and the bottom plate of the high-frequency heating device can be configured to be rotatable by a simple method, they can be easily assembled at the time of production and the effect of claim 1 can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view of a high-frequency heating device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a high-frequency heating device according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view of a high frequency heating device according to an embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view and a bottom view of a bottom plate and a back plate connecting portion according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view of a back plate unit according to an embodiment of the present invention.

FIG. 6 is an exploded perspective view of a conventional high-frequency heating device.

[Explanation of symbols]

 1 heating chamber 1d heating chamber back plate 2 door 4 high frequency heating means (magnetron) 5 object to be heated (food) 6 heater 10 circulation fan 11 circulation fan motor 12 bottom plate 13 pin 15 cooling fan 16 wire 17 heating chamber support plate 19 circulation fan Case 20 Back plate 25 Cooling fan motor

Claims (4)

[Claims] 1. A heating chamber for containing an object to be heated, a bottom plate for holding the heating chamber, a back plate for forming an outer contour of a back surface of the heating chamber, and the heating chamber for heating food stored in the heating chamber. A combined high-frequency heating means and a heater heating means provided in the upper part of the heating chamber, a door for opening and closing the opening of the heating chamber, and a circulation fan for agitating the air in the heating chamber provided in the rear part of the heating chamber, A circulation fan case for storing the circulation fan, a circulation fan motor for driving the circulation fan, a cooling fan for cooling the electric components, and a cooling fan motor for driving the cooling fan are provided, and the circulation fan, the circulation fan motor, the circulation fan case, and A cooling fan and a cooling fan motor are integrated with the back plate, and a lower end of the integrated back plate unit is rotatably connected to the bottom plate with a heater. Frequency heating device. 2. The lower end of a back plate unit in which the circulation fan, the circulation fan motor, the circulation fan case and the cooling fan, and the cooling fan motor are integrated is configured to be rotatably coupled to the bottom plate, and at the same time, the back plate. The high frequency heating device with a heater according to claim 1, wherein the unit is connected to the heating chamber by a wire. 3. The heating chamber is supported by a heating chamber support plate attached to a bottom plate, and the back plate unit in which the circulation fan, the circulation fan motor, the circulation fan case and the cooling fan, and the cooling fan motor are integrated is heated. The chamber and the bottom plate can be independently separated from each other.
High-frequency heating device with a heater as described. 4. A back plate unit in which the circulation fan, a circulation fan motor, a circulation fan case and a cooling fan, and a cooling fan motor are integrated with each other, and a center of a rotation portion of a rotatable portion of a bottom plate is connected by an L-shaped pin. 2. The high-frequency heating device with a heater according to claim 1, wherein one end of the pin serves as a shaft of the rotating portion, and the other end is sunk into a recess (throttle portion) of the bottom plate.