JPH05317168A - Lid heater device for electric rice boiler - Google Patents

Abstract

PURPOSE:To prevent excessive rise in surface temperature as caused by a lifting of a lid heater in a lid. CONSTITUTION:A lid heater is fitted into a groove 12 of a radiation plate 11 of a lid and an aluminum foil 17 is disposed thereon. An end part of a lid heater is connected to a lead 16 with a connection metal 15 and the connection part is covered with the insulated tube 17. A heat transfer body 18 is arranged from above the tube and joined on the radiation plate 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid heater device for maintaining heat in an electric rice cooker.

[0002]

2. Description of the Related Art Generally, an electric rice cooker is provided with a protective frame 2 inside a rice cooker main body 1 as shown in FIG. 3, a casting heater 3 at the bottom, and a pot 4 with an upper opening on which can be set. I am trying. A lid heater 6 for keeping heat is provided on the lid 5 which can be opened and closed by a hinge.
Specifically, a heat radiating plate 7 is arranged on the lower surface of the lid 5, a lid heater 6 is provided thereon, and an aluminum foil 8 for pressing the lid heater 6 against the heat radiating plate 7 is further arranged thereon. The lid heater 6 is connected to the lead wire 9 as shown in FIG.
And the insulating tube 11 covers the periphery of the connection.

[0003]

In the electric rice cooker having the above-mentioned structure, due to the tension caused by the movement of the lead wire 9 connected to the lid heater 6 when the lid 5 is opened or closed, or the insulating tube 11 is thick, The aluminum foil 8 floats from the heat dissipation plate 7 at the connecting fitting 10, and the contact between the lid heater 6 and the heat dissipation plate 7 becomes insufficient at this floating part, so that the lid heater 6
However, there was a problem that the surface temperature became high and the life was shortened.

In view of the above conventional problems, the present invention has as its first object to provide a lid heater device for an electric rice cooker in which the temperature at the connecting portion of the lid heater does not rise excessively. A second object is to make it easier to assemble a structure that prevents the temperature at the connection portion of the lid heater from rising excessively. A third object of the present invention is to make it easier to assemble a structure that prevents the temperature at the connecting portion of the lid heater from rising excessively.

[0005]

In order to achieve the first object, according to the present invention, a lid heater is arranged in a groove of a heat radiating plate of a lid, and an end portion of the lid heater is connected to a lead wire by a connecting fitting. ,
An electric cooker having a structure in which an insulating tube is attached to this connecting portion and a lid heater is covered with an aluminum foil, and a heat transfer body is attached to an end portion of the lid heater including the connecting fitting, and this is joined to a heat radiating plate. This is the structure of the lid heater device of the container.

In order to achieve the second object, the heat transfer member is made of a metal foil, and in order to achieve the third object, the heat transfer foil is made of a liquid curable material.

[0007]

In the lid heater device of the electric rice cooker having the above-mentioned structure, even if the portion corresponding to the end portion of the lid heater of the aluminum foil holding the lid heater is lifted by pulling the lead wire by opening and closing the lid, The heating element transfers the heat of the lid heater to the heat dissipation plate, and thus acts so that the surface temperature of the lid heater does not rise excessively.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. However, the structure of the main body of the electric rice cooker is
Since it is the same as the conventional example, the description thereof is omitted.
As shown in the figure, the groove 12 is formed in the heat dissipation plate 11 in the lid,
A lid heater 13 is fitted in this groove 12. A deeper groove is formed in the portion of the groove 12 corresponding to the end of the lid heater 13.
Forming fourteen. The end of the lid heater 13 has a connecting fitting 15
Is connected to the lead wire 16 by means of which an insulating tube 17 is attached to the outer periphery of this connecting portion. The large-diameter insulating tube 17 is fitted in the deeper groove 14 described above. The end portion of the lid heater 13 including the connection fitting 15 is made of a metal having a good thermal conductivity and has a back surface adhesive and a heat transfer member 18
The heat transfer body 18 is attached to the upper surface of the heat dissipation plate 11. An aluminum foil 19 for fixing the lid heater 13 covers the entire lid heater 13 and is attached to the heat dissipation plate 11.

In the lid heater device for an electric rice cooker of the above-described embodiment, since the insulating tube 17 having a large diameter is fitted into the deeper groove 14, the connecting portion at the end portion of the lid heater 13 has the heat radiating plate 11.
Never floats up. Of course, aluminum foil 19 is also a heat sink 11.
It doesn't float more. In particular, since the heat transfer body 18 is provided on the connecting fitting 15 of the lid heater 13, even if the aluminum foil 19 floats, the heat of the cover heater 13 is transferred to the heat transfer body 18, and this is transferred to the heat dissipation plate 11. Since this is transmitted, the surface temperature of the lid heater 13 does not rise excessively and safety is improved.

Although not shown, the heat transfer member 18 may be made of aluminum foil, gold, silver, or copper foil instead of a metal plate. Since this metal foil is a thin material, it has good adherence to the connecting metal part of the lid heater, and therefore facilitates the assembly work. In addition to metal, liquid heat-curable material such as silicone rubber or compound may be used for the heat transfer body 11, and the assemblability is also improved.

Further, as shown in FIG. 2, in the deeper groove 14, a gap is formed between the end portion of the insulating tube 17 and the aluminum foil 19 is formed by filling the portion with a compound or the like in advance. Even if it floats, the lid heater 13
This heat is transferred to the heat dissipation plate 11 by the heat transfer body 11 so that the surface temperature of the lid heater 13 does not rise excessively.

[0012]

As is apparent from the above description of the embodiments,
According to the present invention, since the heat transfer body is provided in the portion of the connection fitting for connecting the lid heater and the lead wire and this is joined to the heat radiating plate, an aluminum foil for pressing the lid heater by pulling the lead wire when opening and closing the lid is used. Even if the portion corresponding to the connecting portion floats, the heat of the lid heater in the connecting portion 5 is transferred to the heat radiating plate via the heat transfer body, and the surface temperature of the lid heater does not rise excessively, thus ensuring safety. Can be secured.

Further, by using a metal foil or a liquid curable material as the material of the heat transfer member, it is possible to easily construct a structure for preventing the temperature from rising excessively at the connecting portion of the lid heater.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a lid heater device for an electric rice cooker according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same main part.

FIG. 3 is a sectional view of a conventional electric rice cooker.

FIG. 4 is a sectional view of a main part of a lid heater device of the electric rice cooker.

[Explanation of symbols]

 1 Rice cooker main body 4 Pan 5 Lid 11 Heat sink 12 Groove 13 Lid heater 14 Deep groove 15 Connection fitting 16 Lead wire 17 Insulation tube 18 Heat transfer body 19 Aluminum foil

Claims (4)

[Claims] 1. A groove is formed on an upper surface of a heat dissipation plate provided on a lower surface of a lid of an electric rice cooker, a lid heater is disposed in the groove, and an end portion of the lid heater is connected to a lead wire by a connecting fitting. Then, an insulating tube is attached to this connecting portion, the entire lid heater including this connecting portion is covered with an aluminum foil, and a heat transfer body is attached to the end portion of the lid heater including the connecting fitting. A lid heater device for an electric rice cooker in which a heat transfer member is joined to a radiator plate. 2. The lid heater device for an electric rice cooker according to claim 1, wherein the heat transfer member is made of metal foil. 3. The lid heater device for an electric rice cooker according to claim 1, wherein the heat transfer member is made of a liquid curable material. 4. The lid heater device for an electric rice cooker according to claim 1, wherein the groove of the heat dissipation plate is formed such that a portion corresponding to an end portion of the lid heater is formed deeper.