JP2002257353A - High frequency heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high frequency heater in which a small and easy-to- assemble heat supply unit having simple structure is constituted by minimizing the modifying points of the heating chamber of a development model. SOLUTION: A heater unit, i.e., an assembly of a heater 12, a circulation fan 11, a heater cover 14 and a motor 13, is inserted into a hole part made in a rear plate cover 10 and secured tightly in place by inserting the flange part 15 into the gap between a heating chamber rear plate 9 and the rear plate cover 10. Since leakage of hot air can be prevented without covering the contracted part of the heating chamber rear plate 9 entirely, a small heat supply unit having simple structure can be constituted.

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 having a heat supply device for supplying hot air for heating food to a rear surface of a heating chamber.

[0002]

2. Description of the Related Art Conventionally, in developing a high-frequency heating apparatus with a heater of this type, a heating chamber of a high-frequency heating apparatus without a hot-air circulation function, which has already been developed, is diverted for the purpose of keeping design development costs low. Sometimes used. FIG. 5 is a cross-sectional view showing the configuration of a conventional high-frequency heating device with a heater using a heating chamber.

In FIG. 5, reference numeral 1 denotes a heating chamber for storing food, 2 denotes a rear plate of the heating chamber, 3 denotes a heater cover, 4 denotes a heater for supplying heat to the heating chamber, and 5 denotes a heater for stirring generated heat and sends it to the heating chamber. A circulation fan to be sent out, 6 is a motor for rotating and driving the circulation fan, and 7 is a heat insulating cover which is installed behind the heater cover and insulates heat from the heater.

[0004]

However, in the above-mentioned conventional configuration, the heating chamber of the high-frequency heating apparatus without the hot air circulation function, which is the basis of the development, has a large heating chamber for the purpose of increasing the volume of the heating chamber. It is common to adopt a structure in which the plate is squeezed backward, and to configure a heat supply device that supplies hot air to the rear surface using such a heating chamber,
There are many restrictions such as hot air leakage and fixing without screws in the heating chamber, and there is a problem that the structures of the heater cover 3 and the heat insulating cover 7 are large and complicated.

[0005] The present invention solves the above-mentioned conventional problems, and minimizes the change of the heating chamber of the already developed model.
It is an object of the present invention to provide a small-sized heat supply device having a simple structure and easy to assemble.

[0006]

In order to solve the above-mentioned conventional problems, a high-frequency heating apparatus with a heater according to the present invention includes a heater, a circulation fan,
A heater unit in which a heater cover and a motor are assembled is inserted, and a flange portion is inserted into a gap between the rear plate and the rear plate cover to be tightly fixed.

Accordingly, in order to prevent hot air from leaking from the heater unit, it is possible to prevent hot air from leaking in the space between the rear plate and the rear plate cover without covering the entire narrowed portion of the rear plate of the heating chamber. The configuration of the heat supply device having a simple structure can be realized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, by inserting a flange portion of a heater cover into a space between a rear plate and a rear plate cover and closely fixing the same, it is possible to cover the entire narrow portion of the rear plate without covering. Thus, it is possible to prevent a hot air leak, and it is possible to configure a heat supply device having a small size and a simple structure.

The invention described in claim 2 is particularly advantageous in claim 1.
By forming a linear projection on the flange part of the heater cover described in the above, it is possible to prevent hot air leakage by increasing the degree of adhesion between the rear plate and the space of the rear plate cover, and reduce the wind speed to the heating chamber. In addition to stabilizing, the thermal efficiency of the heating chamber can be increased.

[0010] The invention described in claim 3 is particularly advantageous in claim 1.
In the flange portion of the heat insulating cover installed behind the heater cover described in the above, a notch with a notch is provided, and by fitting to the rear plate cover, the screw is fixed without projecting into the heating chamber. Thus, it is possible to prevent hot air leakage generated from the gap between the rear plate and the rear plate cover, and it is possible to configure a heat insulating cover having a small size and a simple configuration.

[0011]

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

Embodiment 1 FIGS. 1 and 2 show a first embodiment of the present invention.
3 is a cross-sectional view of the heat supply device of the high-frequency heating device with a heater according to the example of FIG. In FIG. 1, reference numeral 8 denotes a heating chamber for storing food, and a rear plate 9 of the heating chamber is drawn rearward similarly to a high-frequency heating apparatus having no hot air circulation function.
The heating chamber is designed to have a large volume. Further, behind the heating chamber rear plate 9, a rear plate cover 1 provided for the purpose of forming an air heat insulating layer in order to lower the outer temperature of the heating chamber rear plate in a high-frequency heating device without a hot air circulation function.
0 is provided. The rear plate 9 of the heating chamber is provided with a hole 9a for supplying the wind generated by the circulation fan 11 rotated by the motor 13 at the rear and absorbing the heat of the heater 12 into the heating chamber. A heater cover 14 is configured to cover the circulation fan 11 and the heater 12, and each flange portion 15 is inserted into a gap between the heating chamber rear plate 9 and the rear plate cover 10 through a rectangular hole provided in the rear plate cover 10. You. Further, a projection 16 is provided on the flange portion 15, and is tightly fixed between the rear plate 9 of the heating chamber and the rear plate cover 10.

FIGS. 3 and 4 show the structure of the heat insulating cover of the high-frequency heating device with a heater according to the first embodiment of the present invention. In FIG. 3, reference numeral 17 denotes a heat insulating cover that blocks heat from the heater, and a plurality of fixing claws 18 are provided above and below the heat insulating cover. FIG. 4 is an enlarged perspective view of a main part of the claw portion of the heat insulating cover. In FIG. 4, the claws 18 are provided on the wall of the heat-insulating cover 17, and are provided with slits 19 on both sides so as to be separated from the wall and operate freely. The flange of the claw portion 18 is bent at a position different from the flange of the wall portion,
A step is provided. The claw portion 18 is fitted and fixed by being inserted into a plurality of square holes 19 and 20 provided in the rear plate cover 10.

The operation and operation of the high-frequency heating apparatus with a heater configured as described above will be described below.

First, the upper flange portion 15a of the heater cover 14 is inserted into a gap above the heating chamber rear plate 9 and the rear plate cover 10 through a rectangular hole provided in the rear plate cover 10, and the upper part of the heater cover 14 is inserted. It is slid upward until the wall surface contacts the upper end surface of the square hole provided in the rear plate cover 10. At this time, by making the vertical dimension A of the rectangular hole larger than the dimension B from the upper wall surface of the heater cover 14 to the lower end of the heater cover, the heater cover 1
4 can be inserted into the gap below the heating chamber rear plate 9 and the rear plate cover 10. Next, the heater cover is slid downward until the lower wall surface contacts the lower end surface of the rectangular hole. At this time, by making the dimension C from the upper end of the heater cover to the lower wall surface of the heater cover larger than the vertical dimension A of the rectangular hole, the heater cover is separated from the gap between the rear plate 9 and the rear plate cover 10 of the heating chamber. It is fixed without.

The flanges 15a and 15b are provided with projections 16, and the height of the projections is slightly higher than the gap between the rear plate 9 of the heating chamber and the cover 10 of the rear plate so that the flanges are in close contact with each other. Can be fixed. Further, by making the shape of the projection linear, the space with the gap is closed linearly, and the degree of adhesion with the gap is increased.

Next, the fixing of the heat insulating cover will be described. The fitting claw 18a above the heat insulating cover 17 is inserted into a square hole 19 provided in the rear plate cover 10, and the heat insulating cover is slid upward. At this time, since the fitting claw portion 18 is separated from the wall portion by the slits 19 provided on both sides, the fitting claw portion 18 elastically deforms after coming into contact with the square hole end face. In this state, the lower fitting claw portion 18b is inserted into the square hole 20 and then slid downward, thereby being fixed to the rear plate cover 10 by the upper and lower fitting claw portions.

As described above, in the present embodiment, the flange portion of the heater cover is inserted into the space between the rear plate and the rear plate cover, and a linear projection is formed on the flange portion of the heater cover. The degree of adhesion between the rear plate and the space of the rear plate cover is increased, preventing hot air leakage without covering the entire rear plate drawing part. The wind speed can be stabilized, and the heat efficiency of the heating chamber can be increased.

[0019] Further, the flange portion of the heat insulating cover provided behind the heater cover is provided with a notch having a notch, and the screw is projected into the heating chamber by being fitted to the rear plate cover. It is fixed without any problem, and it is possible to prevent a hot air leak generated from a gap between the rear plate and the rear plate cover, so that a heat insulating cover having a small and simple configuration can be configured.

[0020]

As described above, according to the first to third aspects of the present invention, a small-sized heat supply which can be easily assembled with a simple structure by minimizing the change of the heating chamber of the developed model. The device can be configured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a heat supply device of a high-frequency heating device with a heater according to a first embodiment of the present invention.

FIG. 2 is an assembly sectional view of a heat supply device of the high-frequency heating device with the heater.

FIG. 3 is a sectional view showing a configuration of a heat insulating cover of the high-frequency heating device with the heater.

FIG. 4 is a perspective view of a main part of a claw portion of a heat insulating cover of the high-frequency heating device with the heater.

FIG. 5 is a cross-sectional view of a heat supply device of a conventional high-frequency heating device with a heater.

[Explanation of symbols]

 9 Back plate of heating chamber 10 Back plate cover 14 Heater cover 16 Projection 17 Insulation cover 18 Fitting claw

Claims (3)

[The claims] 1. A heating chamber for storing an object to be heated, a circulating fan provided at the rear of the heating chamber for stirring air in the heating chamber, a heater heating means serving as a heat source for increasing the temperature of the heating chamber, and The heating chamber is provided with a heater cover, and the rear surface of the heating chamber has a double structure of a rear plate facing the heating chamber and a rear plate cover provided to cover the heating chamber. A high-frequency heating device with a heater configured to be inserted into the gap between the rear plate and the rear plate cover from the hole provided and fixedly adhered. 2. The high-frequency heating device with a heater according to claim 1, wherein each flange of the heater cover has a linear projection. 3. The high-frequency heating apparatus with a heater according to claim 1, further comprising: a heat insulating cover provided behind the heater cover; and a fitting claw having a notch in a flange portion of the heat insulating cover.