JP3248324B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker provided with a high-frequency generator used in general households and the like.

[0002]

2. Description of the Related Art Conventionally, this type of rice cooker has been disclosed in Japanese Utility Model Laid-Open No. 3-23.
The configuration is as shown in JP 7920 Gazette. Hereinafter, the configuration will be described with reference to FIG.

[0003] An inner pot 1 deep drawn by an aluminum alloy is provided with a clad material rolled from an aluminum plate and a stainless steel plate, which is deep drawn so that the inner side of the inner pot 1 becomes an aluminum plate, and a cooking object 2 is accommodated therein. I have. A temperature detecting sensor 3 is slidably provided up and down by a compression spring 4, and is urged to the outer bottom surface of the inner pot 1 to detect the temperature of the inner pot 1. The side and bottom of the inner pan 1 are surrounded by a non-metallic protective frame 5, and an electromagnetic induction heater 6 is disposed at the bottom and lower side of the protective frame 5. An inner lid 8 drawn by a metal plate is placed on a step 7 provided at an upper opening of the inner pan 1. A metal holder shaft 9 is tightly fixed to the center of the inner lid 8, and the holder shaft 9 is biased by a biasing spring 12 in a central hole of a lower plate 11 of an outer lid 10 provided on the upper part of the main body so as to be openable and closable. Slidably penetrates through the inner lid 1 so as to be tightly urged to the step 7 of the inner pot 1 when the outer lid 10 is closed. An opening 13 is provided in the inner lid 8, and a high-frequency energy generated from a high-frequency generator 15 is transmitted and supplied into the inner pot 1 by attaching a waveguide 14 to the opening 13.

[0004]

In a rice cooker equipped with such a conventional high-frequency generator, the urging force of the urging spring 4 is applied to the inner lid 8 and the step 9 provided at the upper opening of the inner pan 1. Although it is in close contact, a gap is generated between the inner lid 8 and the step 7 due to the variation in flatness of the contact portion between the inner lid 8 and the step 7, and high frequency leaks out of the cooking chamber from the gap. There were challenges.

An object of the present invention is to provide a rice cooker provided with a high-frequency generator having a configuration in which high-frequency does not leak out of the cooking chamber.

[0006]

In order to achieve the above object, a rice cooker of the present invention comprises a bottomed cylindrical metal pot removably housed in the rice cooker main body, and the rice cooker main body. A lid body that opens and closes the upper opening of the lid, a metal lid forming the lower surface of the lid body, a heating device that heats the pan, and a high-frequency generator that heats the food in the pan, A cylindrical metal protective frame surrounding the outside of the side of the pot and having an edge corresponding to the shape of the flange under the lid, a temperature detecting means for detecting the temperature of the pan, Heating control means for controlling the generator, provided with a cavity resonator for preventing radio wave leakage from the gap with the flange under the lid at the edge of the protective frame, in the cylindrical inner peripheral surface of the protective frame Is to provide a cavity resonator for preventing electric wave leakage from a gap between the pot and the outer peripheral surface of the pot.

[0007]

According to the present invention, a cylindrical metal protective frame provided with an edge corresponding to the outer shape under the lid surrounds the outside of the side of the pot. The gap between the inner surface of the protection frame and the inner surface of the pot and the outer periphery of the pot can prevent high-frequency leakage to the outside of the cooking chamber. is there.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, a bottomed cylindrical pot 21 deep drawn by an aluminum alloy is deep drawn by a clad material rolled from an aluminum plate and a stainless steel plate so that the inside of the pot 21 becomes an aluminum plate. , Is removably stored in the rice cooker body 22. The pot 21 contains a cooking product 23. The temperature detection sensor 24 detects the temperature of the outer bottom surface of the pan 21.

The lid 25 covers the opening on the upper surface of the rice cooker main body 22 so that it can be opened and closed. The lower surface of the lid 25 is formed by a metal lower lid 26. A lower cover 27 made of nonmetal is fastened to the lower surface of the lower lid 26 with screws 28. A pot packing 29 is attached to the lower surface of the lid lower cover 27, and is in contact with the upper surface opening of the pot 21. A nonmetallic inner lid holder shaft 30 is fixed to the center of the lower cover, and a nonmetallic inner lid 31 is attached to the inner lid holder shaft 30 via a silicone rubber inner lid holder 32. .

The side and bottom of the pot 21 are surrounded by a non-metallic protective frame cover 33, and an electromagnetic induction heating device 34 is disposed on the bottom and lower side of the protective frame cover 33. A metal protective frame 35 is disposed on the outer peripheral side of the upper portion of the pot 21, and the protective frame 35 is provided with a flange portion 36 of the lower lid 26.
And is fixed to the upper part of the rice cooker main body 22 with an edge 37 corresponding to.

A metal waveguide 39 is fixed to a high-frequency generator 38 in the rice cooker main body 22, and an irradiation port 40 is formed at an upper end of the waveguide 39 so as to penetrate the protection frame 35.
The heating control unit 41 controls the electromagnetic induction heating device 34 and the high frequency generator 38.

The edge 37 of the protection frame 35 is provided with a cavity resonator A43 for preventing radio waves from leaking from a gap between the lower lid 26 and the flange 36, and the pot 21 is provided on the inner peripheral portion 44 of the protection frame 35. A cavity resonator B45 is provided for preventing radio waves from leaking from the gap with the outer periphery of the cylinder.

In the above configuration, the high-frequency energy generated from the high-frequency generator 38 is transmitted through the waveguide 39 to the irradiation port 4.
0 to the cooking chamber composed of the protective frame 35, the lower lid 26, and the pan 21, thereby preventing radio waves from leaking out of the cooking chamber.

[0015]

As is apparent from the above embodiments, according to the present invention, the cooking chamber to which the high-frequency energy is supplied is provided with a protective frame fixed to the rice cooker main body, and a top opening of the rice cooker main body. It consists of a lid provided on the lid that covers freely, and a pot that is removably stored in the rice cooker body,
A cavity resonator A for radio wave leakage is provided in the gap between the protection frame and the lid, and a cavity resonator B for radio wave leakage is provided in the gap between the protection frame and the outer surface of the pot. Therefore, it is possible to prevent radio waves from leaking out of the cooking chamber.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rice cooker showing one embodiment of the present invention.

FIG. 2 is a sectional view of a conventional rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Pot 22 Rice cooker main body 25 Lid 26 Under lid 35 Protective frame 38 High frequency generator 43 Cavity resonator A 45 Cavity resonator B

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-237920 (JP, A) JP-A-2-13723 (JP, A) JP-A-1-281328 (JP, A) JP-A-58-1983 26486 (JP, A) Japanese Utility Model Showa 51-151148 (JP, U) Japanese Utility Model Showa 61-53899 (JP, U) Japanese Utility Model Showa 52-114443 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) A47J 27/00 F24C 7/02

Claims (1)

(57) [Claims] 1. A rice cooker main body, a bottomed cylindrical metal pot removably housed in the rice cooker main body, a lid body that opens and closes an upper opening of the rice cooker main body, and a lid. A metal lid forming the lower surface of the body, a heating device for heating the pan, a high-frequency generator for heating the food in the pan, and a flange under the lid surrounding the outside of the side of the pan A cylindrical metal protective frame having an edge corresponding to the shape, a temperature detecting means for detecting the temperature of the pan, and a heating control means for controlling the heating device and the high-frequency generator; At the edge of the frame, a cavity resonator for preventing radio wave leakage from a gap with the flange below the lid is provided, and at the inner circumferential surface of the protection frame, radio wave leakage from the gap with the outer circumferential surface of the pot is provided. Rice cooker equipped with a cavity resonator for prevention.