JP5523050B2 - Electromagnetic induction heating cooker - Google Patents

Description

  The present invention relates to an electromagnetic induction heating cooker, and more particularly to an attachment structure for temperature detection means arranged on the lower surface of a top plate.

  Conventional electromagnetic induction heating cookers apply heat conductive silicon grease to the temperature sensing element of the temperature detecting means arranged in the heating coil, cover the upper surface with a carbon sheet, and make it adhere to the back surface of the top plate (patent) Reference 1).

Japanese Patent Laying-Open No. 2005-183064 (first page, FIG. 2)

In a conventional electromagnetic induction heating cooker, heat conductive silicon grease is applied to the temperature sensing element, the upper surface is covered with a carbon sheet, and the carbon sheet is adhered and adhered to the back surface of the top plate with an adhesive. In addition, there are problems that the silicon coating on the top surface of the top plate is damaged by two times of applying the silicon grease and pasting the carbon sheet and rubbing by the back surface of the top plate and the carbon sheet.
The present invention has been made to solve such problems, and an object thereof is to obtain an electromagnetic induction heating cooker in which a temperature detecting means can be attached to the back surface of the top plate so as not to damage the back surface of the top plate.

  The electromagnetic induction heating cooker of the present invention includes a top plate provided on an upper surface of a cooker body case, a donut-shaped heating coil disposed on the back side of the top plate inside the cooker body case, A temperature detecting means disposed in the center of the heating coil and pressed against the back surface of the top plate, and a bias that constantly urges the temperature sensing surface of the temperature detecting means against the back surface of the top plate so as to be in close contact therewith. An electromagnetic induction heating cooker comprising: a coating protective film made of the same paint as a coating protective film made of paint provided on the back surface of the top plate on the temperature-sensitive surface of the temperature detecting means; To do.

In the electromagnetic induction heating cooker of the present invention, a top plate provided on the upper surface of the cooker body case, a donut-shaped heating coil disposed on the back side of the top plate inside the cooker body case, A temperature detecting means disposed at the center of the heating coil and pressed against the back surface of the top plate, and a temperature sensing surface of the temperature detecting means is pressed against the back surface of the top plate and always energized so as to be in close contact therewith. And a paint protective film made of the same paint as the paint protective film provided on the back surface of the top plate is provided on the temperature sensitive surface of the temperature detecting means. Since the paint protective film is made of the same material as the paint protective film of the top plate, it is possible to prevent the paint protective films from being damaged.
In addition, the coating film on the temperature-sensitive surface of the temperature detection means is a painting-only process, so there is little work like conventional silicon grease application and carbon sheet application, and workability is also good. There is an effect that there is.

The perspective view which shows the external appearance of the electromagnetic induction heating cooking appliance of Embodiment 1 of this invention. The longitudinal cross-sectional view which shows the principal part of the electromagnetic induction heating cooking appliance. The longitudinal cross-sectional view which shows the principal part of the electromagnetic induction heating cooking appliance of Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the electromagnetic induction heating cooker according to Embodiment 1 of the present invention as viewed from the front.
As shown in FIG. 1, the electromagnetic induction heating cooker according to the first embodiment of the present invention is configured around a cooker main body case 1 having a substantially rectangular shape with an upper portion opened, and a top surface of the cooker main body case 1. A plate portion 2 is provided.
The top plate portion 2 includes a top plate frame 3 and a top plate 4 made of glass having high heat resistance and attached to the opening of the top plate frame 3.
On the upper surface of the top plate 4, circular guide marks 5M1 and 5M2 indicating the approximate positions of the left and right heating coils 7 and the central heating source (not shown) are displayed.

In the cooker main body case 1, there are provided doughnut-shaped heating coils 7 on the left and right sides that are induction heating sources, and a radiant heater (not shown) that is a rear central heating source that is heated by electric radiation heat.
A grill heating chamber 8 is provided on the front left side of the main body case 1. The front opening of the grill heating chamber 8 is covered with a grill door 9 so as to be freely opened and closed. The opening / closing operation of the grill door 9 can be performed by a handle 9a protruding forward.

As shown in FIG. 1, the operation means of the electromagnetic induction heating cooker includes a front operation unit 11 provided on the right front surface of the cooker body case 1 and an upper operation unit 15 provided on the front surface side of the top plate 4. It has become.
The front operation unit 11 includes a main power switch operation button 12 that can turn on / off all the power sources of the left and right heating coils 7 and the central heating source at once, energization of the right heating coil and the energization amount (thermal power). A right operation dial 13R for controlling the current, a left operation dial 13L for controlling the energization of the left heating coil and its energization amount (thermal power), a central operation dial 13C for controlling the energization of the central heating source and its energization amount (thermal power), etc. Is provided.

The upper surface operation unit 15 is provided with a right heating power setting operation unit, a left heating power setting operation unit, and a central operation unit that controls energization of the heater of the grill heating chamber 8.
Further, an integrated liquid crystal display unit 30 is provided on the front side in the front-rear direction at the center in the left-right direction of the top plate 4, and liquid crystal display units 31 </ b> L and 31 </ b> R are provided on the left and right of the integrated liquid crystal display unit 30.
The integrated liquid crystal display unit 30 displays energization states (thermal power, time, etc.) of the left and right heating coils, the central heating source, and the heater of the grill heating chamber 8. The left and right liquid crystal display units 31L and 31R display the elapsed time from the start point in the timer cooking with numerals.
Reference numerals 32L and 32R denote heating power display units for the left and right heating coils, and reference numeral 33 denotes a thermal power display unit for the central heating source.

In FIG. 2, the left and right donut-shaped heating coils 7 have leg portions 6 a on the coil base holding member 10 attached to a horizontal partition plate (not shown) in the cooker body 1 on the back side of the top plate 4. It is installed on the held coil base 6. The coil base 6 has a central opening 6b in the central portion.
And the temperature detection means 20 hold | maintained at the cylindrical protective tube holder 19 is provided in the center part of the heating coil 7, and the center opening 6b of the coil base 6. FIG.

  The temperature detection means 20 has a cylindrical shape and a protective tube 21 made of aluminum having an outer diameter of 5 mm, for example, and an outer diameter that closes one end of the protective tube 21, for example, 9 mm and has a top surface that becomes a flat temperature-sensitive surface. A temperature-sensitive sensor 23 made of, for example, a thermistor, which is disposed in the cap 22 made of meat and made of aluminum and disposed in the protective tube 21 and whose temperature-sensitive portion contacts the lower surface of the cap 22, and the temperature-sensitive sensor 23 is fixed in the protective tube 21. For example, a filling material 24 made of, for example, an insulating material, a lead wire 25 connected to a core wire 23a of a temperature sensor 23 extending from the other end of the protective tube 21, and connected to a control unit (not shown), It consists of The protective tube 21 and the cap 22 are made of aluminum, but may be made of ceramics as long as the material has non-permeability.

The protective tube holder 19 has a spring receiving flange 19a on the outer periphery of the central portion. The upper surface which is one end of the protective tube holder 19 supports the lower surface of the peripheral edge of the cap 22.
The flat upper surface of the cap 22 of the temperature detecting means 20 is topped by a coil spring 28 interposed between the spring receiving flange 19a of the protective tube holder 19 and the spring receiving portion 10a provided on the coil base holding member 10. The plate 4 is pressed against the back surface of the plate 4 to be brought into close contact therewith.

The back surface of the top plate 4 is usually provided with a coating protective film 4a having a thickness of 10 [mu] m made of silicon paint so that printed characters can be clearly lifted and no spots are generated. This silicone paint is formed by mixing a silicone resin as a main agent and an adhesive in order to improve adhesion.
Further, a coating protective film 22 a having a thickness of 10 to 20 μm is provided on the flat upper surface of the cap 22 that is pressed against and adhered to the back surface of the top plate 4 with the same silicon paint as that provided on the top plate 4. ing.

As in the first embodiment, the upper surface, which is a flat temperature-sensitive surface of the cap 22 that is pressed against and adhered to the back surface of the top plate 4, is the same as the coating protective film 2 a made of silicon paint provided on the top plate 4. By providing the paint protective film 22a made of silicon paint, the paint protective film 22a of the cap 22 is made of the same material as the paint protective film 4a of the top plate 4, so that the paint protective films 4a and 22a can be prevented from being damaged. .
Moreover, since the coating protective film 22a of the cap 22 with the silicon paint is a process of painting only with the paint, there is little trouble such as the conventional application of silicon grease and the attachment of the carbon sheet, and the workability is also good. .

In the above description, the paint protective film 4 a made of silicon paint is provided on the back surface of the top plate 4, and the paint protective film 22 a made of silicon paint is also provided on the upper surface of the cap 22. In the case where the back surface is provided with a paint protective film 4a made of paint mainly containing fluorine, graphite, aluminum or the like, correspondingly, the upper surface of the cap 22 is similarly made of paint mainly containing fluorine, graphite, aluminum or the like. A coating protective film 22a is provided.
Further, when the paint protective film 4a on the back surface of the top plate 4 and the paint protective film 22a on the upper surface of the cap 22 are made of the same paint, it is desirable that both have the same hardness. It is desirable to soften the coating protective film 22a.
This is because the paint protective film 22a on the upper surface of the cap 22 is easily adapted to the paint protective film 4a on the back surface of the top plate 4 so that the paint protective film 2a on the back surface of the top plate 4 is not damaged.

Embodiment 2. FIG.
FIG. 3 is a longitudinal sectional view showing a main part of the electromagnetic induction heating cooker according to the second embodiment of the present invention.
In the second embodiment, the same configurations as those of the first embodiment are denoted by the same reference numerals, and the description of the duplicate configurations is omitted, and a configuration different from the first embodiment will be described.
The second embodiment is the same as the first embodiment in that a coating protective film 22a made of the same material as the coating protective film 2a provided on the back surface of the top plate 4 is provided on the upper surface of the cap 22. In the mode 2, the fine unevenness 27 is formed by shot blasting before the coating protective film 22a is provided on the upper surface of the cap 22. The surface roughness of the upper surface of the cap 22 is, for example, 2 to 4 μm.
The reason why the fine irregularities 27 are formed on the upper surface of the cap 22 in this way is that when the coating protective film 22a is formed after that, the fixing property and adhesion of the coating protective film 22a to the upper surface of the cap 22 are improved. Because it can.
Further, the fixing property and adhesion of the coating protective film 22a to the upper surface of the cap 22 are improved, so that the temperature of the temperature sensor 23 of the temperature detecting means 20 increases almost simultaneously with the temperature increase of the back surface of the top plate 4. This is because the sensitivity of the temperature sensor 23 is improved.

  DESCRIPTION OF SYMBOLS 1 Cooker main body case, 2 Top plate part, 3 Top plate frame, 4 Top plate, 4a Paint protective film, 5M1 guide mark, 5M2 guide mark, 6 Coil base, 7 Heating coil, 8 Grill heating chamber, 9 Grill door, DESCRIPTION OF SYMBOLS 11 Front operation part, 15 Upper surface operation part, 20 Temperature detection means, 21 Aluminum protective tube, 22 Aluminum cap, 22a Paint protective film, 23 Temperature sensor, 24 Filling material, 25 Heat shrinkable tube, 26 Lead wire.

Claims (4)

A top plate provided on the upper surface of the cooker body case; a donut-shaped heating coil disposed on the back side of the top plate inside the cooker body case; and a central portion of the heating coil, An electromagnetic induction heating cooker comprising temperature detecting means pressed against the back surface of the top plate, and urging means that constantly urges the temperature sensing surface of the temperature detecting means against the back surface of the top plate so as to be in close contact therewith In
An electromagnetic induction heating cooker, characterized in that a coating protective film made of the same paint as a paint protective film provided on the back surface of the top plate is provided on the temperature-sensitive surface of the temperature detecting means. A top plate provided on the upper surface of the cooker body case; a donut-shaped heating coil disposed on the back side of the top plate inside the cooker body case; and a central portion of the heating coil, An electromagnetic induction heating cooker comprising temperature detecting means pressed against the back surface of the top plate, and urging means that constantly urges the temperature sensing surface of the temperature detecting means against the back surface of the top plate so as to be in close contact therewith In
A coating protective film made of the same paint as the coating protective film by the paint provided on the back surface of the top plate is provided on the temperature sensitive surface of the temperature detecting means ,
The temperature detection is performed on a coating material having the same coating protection film provided on the back surface of the top plate and a coating protection film provided on the temperature-sensitive surface of the temperature detection means. An electromagnetic induction heating cooker provided on a temperature-sensitive surface of the means .   The electromagnetic induction heating cooker according to claim 1 or 2, wherein fine irregularities are provided on a temperature-sensitive surface of the temperature detecting means, and a coating protective film made of a paint is provided on the fine irregularities.   The temperature sensing surface of the temperature detecting means is formed of aluminum, and the coating protective film provided on the back surface of the top plate is a paint mainly composed of silicon resin, a paint mainly composed of fluorine, a paint mainly composed of graphite, or The electromagnetic induction heating cooker according to any one of claims 1 to 3, wherein the electromagnetic induction heating cooker is formed of any one of paints mainly composed of aluminum.

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