JP2001221441A - High-frequency heating appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-frequency heating apparatus in which a top plate for separating a cooking space for housing a material to be cooked from a space for revolution of a rotary radiation agitation conductor can be attached/ detached inexpensively in the case of cleaning the plate. SOLUTION: A projection 15 is formed on the outer periphery of the top plate 12. The projection 15 is inserted and fit in a hole 16 made in a heating chamber 6. The top plate 12 is attached/detached by deforming in a variable range a click 17 having projections 15 on both sides of the top plate 12. In the state of the top plate 12 being attached, a stress to the top plate 12 is completely released. The plate 12 is attached in the condition in which a stress is not applied to any parts of the top plate 12 including the click 17. Thus the top plate can be attached/detached easily for cleaning in an inexpensive constitution.

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, and more particularly to a shape of a top plate and a method of mounting the same.

[0002]

2. Description of the Related Art Heretofore, this type of high-frequency heating apparatus has generally been described in JP-A-62-312725. As shown in FIG. 3, the top plate is composed of an outer frame portion 1 made of a low dielectric loss resin and a flat plate portion 2 made of a nonflammable low dielectric loss material such as a silicon laminate. The flat plate portion 2 is integrated with the flat plate portion 2 by sliding the flat plate portion 2 into the groove formed in the outer frame portion 1, and the top plate is attached to the heating chamber by the protrusion provided on the heating chamber side. The projections 3 formed on the outer frame portion 1 of the top plate are fitted into the holes, and the projection portions 5 formed on the claw portions 4 on the left and right of the outer frame portion of the top plate use the elasticity of the resin. Then, the operation is performed by displacing the claw portion 4 to the position B in the drawing.

[0003]

However, in the conventional high-frequency heating device, the top plate is constituted by a combination of the outer frame portion 1 made of resin and the flat plate portion 2 made of a nonflammable material such as a silicon laminate. Although the amount of resin used is reduced, polypropylene, which is a low-dielectric-loss and inexpensive resin material generally used in the heating chamber of a high-frequency heating device, is flammable and should be used in the heating chamber. If it ignites at, there is a risk that it will burn and spread damage.

Although polypropylene is a resin having excellent oil resistance and detergent resistance, bromine is used as an additive for flame retardancy. There was a problem that it could not be used.

[0005] As described above, there is no thermoreversible resin which satisfies all the conditions of oil resistance, detergent resistance, flame retardancy, low dielectric loss, and low cost. A verification experiment was conducted on a composite material of polyetherimide and polystyrene that satisfies each of the above conditions, but it was assumed that oil and detergent would adhere in actual use by mounting a top plate shaped like the conventional example in FIG. When the oil resistance and detergent resistance tests were performed, there was a problem that the resin of the nail portion under the stress was broken by the oil and the detergent.

Further, the silicon laminate constituting the flat plate portion 2 is an expensive material, and it is desired to integrally form the top plate with a low-cost resin in a shape that can be easily removed at the time of cleaning. Therefore, it could not be realized.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a top plate is attached to a heating chamber by projecting a projection provided on an outer peripheral portion of the top plate into a projection provided in the heating chamber. It is inserted into the hole and supported, and the claws with protrusions provided on both sides are attached and removed by deforming in the reversible range, and the stress on the top plate is completely And a shape that can be attached to any part of the top plate, including the claw part, without stress, so that flame-retardant, low dielectric loss resin such as the aforementioned polyetherimide-polystyrene composite material can be used. It was confirmed by an experiment that even if an inexpensive resin was used, the nail portion was not broken by oil or detergent.

According to the above invention, an inexpensive resin material having poor oil resistance and detergent resistance but having flame retardancy and low dielectric loss can be used. A top plate that is inexpensive and easily removable during cleaning or the like can be configured.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a heating chamber in which a cooking object is placed, a rotating radiation stirring conductor for radiating and agitating microwaves above the heating chamber, and a rotating space for the rotating radiation stirring conductor. And a top plate that separates a cooking space for accommodating the food, wherein the top plate is integrally formed of a resin having a low dielectric loss, and the top plate is attached to the heating chamber at an outer peripheral portion of the top plate. The protrusion provided on the top of the heating chamber is inserted into and supported by the protrusion hole provided on the heating chamber, and the claw having the protrusions provided on both sides of the top plate is attached by deforming in a reversible range. In addition to performing the removal, the stress on the top plate is completely released in the mounted state, and any part of the top plate including the claw portion,
It has a configuration in which it can be mounted without stress.

[0010] The claw having projections provided on both sides is attached and removed by deforming the claw in a reversible range, and in the mounted state, the stress on the top plate is completely released, and the claw is removed. By using a shape that can be attached to any part of the top plate including no stress, without using stress, even if an inexpensive resin such as a flame retardant and low dielectric loss resin such as a composite material of polyetherimide and polystyrene is used, The claw portion does not break due to oil or detergent, and can be configured as a top plate that is integrally formed and inexpensive and that can be easily attached and detached at the time of cleaning, including a flat plate portion conventionally formed as a separate component.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-frequency heating apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a top sectional view of a main part of a high-frequency heating apparatus according to an embodiment of the present invention, and FIG. 2 is a side sectional view of a main part of the high-frequency heating apparatus.

As shown in FIG. 1, a door 8 for taking in and out the food 7 is provided on a front surface of the heating chamber 6. The microwave radiated from the magnetron 9 passes through the waveguide 10 and is radiated and stirred into the heating chamber 6 by the rotating radiation stirring conductor 11.

The top plate 12 separates the rotating space 13 of the rotating radiation stirring conductor 11 from the cooking space 14 for accommodating the food 7.
The rotating radiation stirring conductor 11 is prevented from being damaged due to the scattering of the cooked food 7 and causing the discharge, and the rotation radiation stirring conductor 11 and the high frequency heating device are prevented from being damaged when the inside of the refrigerator is cleaned. It is provided for the purpose of doing.

In order to fulfill the above-mentioned function, the top plate 12 is disposed between the rotating stirrer radiation conductor 11 and the cooking object 7, and most of the microwaves radiated from the rotary stirrer radiation conductor 11 pass through the top plate 12. Since the material passes through the top plate 12, a resin having a low dielectric loss, which does not easily generate heat by microwaves, is used.

The top plate 12 is integrally formed as shown in FIG. 1, and the top plate 12 is attached to the heating chamber 6 by the top plate 1.
The plurality of protrusions 15 provided on the outer peripheral portion of No. 2 are inserted into and supported by protrusion holes 16 provided in the heating chamber 6.

Then, as shown in FIG. 2, the claws 17 having the projections 15 provided on both sides are attached and detached by displacing from the natural position A to the position B in the natural state. The top plate 12 is provided with a stopper 18 to prevent displacement beyond a reversible range. When the mounting is completed, the claw portion 17 returns to the position A in the natural state, and the stress is completely released at any portion of the claw portion 17 and the top plate 12 when the mounting is completed. The shape is such that

In general, the resin that can be used in the heating chamber of the high-frequency heating device is a low dielectric loss material that generates little self-heating due to microwaves, and food debris is discharged and ignited in the heating chamber. When it is done, it is flame retardant to prevent the spread of damage, food may be touched, it meets the Food Sanitation Law, the unit price of materials is low, oil coming from food and detergent used for cleaning Oil resistance and detergent resistance so that the resin does not deteriorate and be damaged by corrosion.However, polypropylene resin generally used in the heating chamber of a high-frequency heating device is flammable. However, because of the use of bromine as an additive for flame retardancy, there is currently a resin material that satisfies all of the above conditions, such as not being able to be used in a heating chamber where there is a risk of touching food for food hygiene. There.

However, according to the structure of the present invention, no stress is applied to any part of the top plate 12 in the steady state attached to the heating chamber, even if the material is poor in oil resistance and detergent resistance. Even if the surface layer of the resin is affected by oil or detergent, the resin does not proceed to the deep portion and the claw does not break. This time, a composite material of polyetherimide and polystyrene was selected as a material that satisfies the above-mentioned conditions other than oil resistance and detergent resistance, and a confirmation experiment was performed using the shape and configuration shown in the present example. Claw part 17
Is no longer broken.

As described above, even when a flame-retardant, low-dielectric-loss and inexpensive resin such as a composite material of polyetherimide and polystyrene is used, the claws 17 are not broken by oil or detergent. It is possible to form the top plate 12 which is inexpensive and easy to attach and detach at the time of cleaning etc. by integral molding, including the flat plate portion which constitutes the top plate in combination with another component such as a nonflammable silicon laminate to reduce as much as possible. It has the advantageous effect of being able to.

In this embodiment, the rotary antenna 11 has been described as an example of the rotating radiation stirring conductor. However, it is needless to say that the present invention has the same effect in other rotating radiation stirring conductors. .

[0022]

As described above, according to the high-frequency heating apparatus of the present invention, the top plate for separating the rotating space of the rotating radiant stirring conductor from the cooking space for storing the cooking product is mounted on the heating chamber. The projection provided on the outer periphery of the top plate is inserted into and supported by the protrusion hole provided in the heating chamber, and the claw having the projection provided on both sides of the top plate is deformed in a reversible range. In addition to mounting and removing, the stress on the top plate is completely released in the mounted state, and it is configured so that it can be attached to any part of the top plate including the claw portion without applying stress, so it is made of poly Even if an inexpensive resin such as a flame-retardant and low dielectric loss resin such as a composite material of ether imide and polystyrene is used, the claws do not break due to oil or detergent, including flat plate parts that were conventionally composed of separate parts. Integrally molded top plate that is inexpensive and easy to attach and detach when cleaning Can be constructed, it has an advantageous effect that.

[Brief description of the drawings]

FIG. 1 is a top cross-sectional view of a main part of a high-frequency heating device according to an embodiment of the present invention.

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

FIG. 3 is a top view of a main part of a conventional high-frequency heating device.

[Explanation of symbols]

 Reference Signs List 6 heating room 7 cooking object 11 rotating radiation stirring conductor 12 top plate 13 rotating space 14 cooking space 16 protrusion hole 17 claw portion

Claims (1)

[Claims] 1. A heating chamber on which a food is placed, and a rotating radiation stirring conductor for radiating and stirring microwaves, a rotating space of the rotating radiation stirring conductor, and the food are stored above the heating chamber. A top plate for separating the cooking space is provided, wherein the top plate is integrally formed of a resin having a low dielectric loss, and the top plate is attached to the heating chamber by a projection provided on an outer peripheral portion of the top plate. A configuration in which it is inserted into and supported by the projecting hole provided in the heating chamber, and is attached and removed by deforming a claw portion having projections provided on both sides of the top plate in a reversible range, A high-frequency heating device having a configuration in which the stress on the top plate is completely released in the mounted state, and the top plate can be attached to any part of the top plate including the claw portions without applying any stress.