JPS59230283A - Heat generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to a heating element for an electric heating appliance for heating liquids such as water, milk, and alcoholic beverages.

Conventional configuration and problems Generally speaking, conventional space-type mica heaters have heating wires wrapped around an insulating plate to form a heating plate, and insulating plates such as mica plates are stacked on both sides of this heating plate, and The metal plates were stacked one on top of the other, and the peripheral edges of the metal plates were caulked together to form a heating element with a disc-like or rectangular shape. The lead wire draw-out section was constructed by tightly folding the attached wire from the end of the wrapped heating wire or by twisting it into multiple layers and leading it out to the outside, and inserting an insulating tube into this.

In the case of this type of space-type mica heater, design considerations have been made to prevent the generation of a space layer between the heating plate and the metal plate as much as possible. It prevented the decrease in physical endurance.

Therefore, in order to improve the adhesion between the heat generating plate and the metal plate, we made efforts in designing the outer periphery of the caulking method, precision of the parts, measures to prevent deformation of the parts, etc. It was necessary to increase the surface area as much as possible within the cost tolerance in relation to the l-i line temperature. In addition, in the lead wire extraction section, the overlapping part of the heating wire and the attachment wire separates due to the degree of closeness between the heating wire and the attachment wire, vibration during use, external force, etc., causing significant oxidation and fatigue, and the self-reliance of the lead wire section. Due to increased heat generation, etc., many disconnections and failures occurred in this part.

Purpose of the Invention The present invention takes into account the above-mentioned conventional problems, and improves the lifespan of the heating wires by effectively dissipating heat between the members sandwiching the heat generating element including the heating wires, that is, the heat transfer plate, the heat diffusion plate, and the back plate. The purpose is to expand.

Structure of the Invention In order to achieve the above object, the present invention includes a heat transfer plate and a heat diffusion plate that sandwich a heat generating element having a heating wire, and a back plate superimposed on the heat diffusion plate, the heat transfer plate, the heat diffusion plate A peripheral wall is formed on each of the plate and the back plate, and each peripheral wall is overlapped to form a heating element.Effective heat dissipation in the peripheral wall prevents heat from being trapped inside.
This contributes to extending the life of the heating wire of the heating element.

Description of examples An embodiment of the present invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a circular dish-shaped transmission plate made of a material with good thermal conductivity, having a protrusion 1a projecting upward in the center and a peripheral wall 1b on the outer periphery. Reference numeral 2 denotes a disc-shaped heat generating plate having a main heat generating part and an auxiliary heat generating part, in which a heating wire 2C is wound around an insulating substrate 2b having a through hole 2a in the center. This heating board 2
has L-shaped terminal pieces 7 and 8 erected on a surface, and has an insulating member 9 surrounding the terminal pieces 7°8, and a crotch seat 9a is formed on the outer periphery of the insulating member 9. There is. 3 and 4 are flat insulating plates having a through hole in the center having the same shape as the through hole 2C of the heat generating plate 2. 6 is a face plate portion 6 having the same shape as the heat generating plate 2;
a, with a through hole in the center and a peripheral wall 5b on the outer periphery.
It is a heat diffusion plate having 6 has a face plate part 6a similar to the face plate part 5a of the heat diffusion plate 5, has a hole in the center that is slightly smaller than the hole in the heat diffusion plate 5, and has a peripheral wall 5 page 6b on the outer periphery. are doing.

Insulating plates 3 and 4 are stacked on both sides of the heat-generating plate 2, and the laminated structure is sandwiched between the face plate part of the heat transfer plate 1 and the face plate part 5a of the heat diffusion plate 60, and is further placed on the back surface of the heat diffusion plate 6. Overlap the back plate 6. Then, the rear plate 6 is made by bending the hole edge 6C of the through hole in the center, aligning this with the inner side of the protrusion in the center of the heat transfer plate 1, and welding this part tightly. There is.

Further, the peripheral wall 6b of the back plate 6 is closely attached to the end of the peripheral wall 1b of the heat transfer plate 1 by the same welding process. At this time, the peripheral wall 5b of the heat diffusion plate 6 is the same as each peripheral wall 1b of the heat transfer plate 1 and the back plate 6.
, 6b, and have a heat conduction relationship.

The terminal pieces 7 and 8 and the insulating member 9 of the heat generating board 2 are led out to the outside through lead-out holes formed in the heat diffusion plate 6 and the back plate 6. A locking step portion 6d is formed at the edge of the outlet hole of the back plate 6, and the locking step portion 6d allows the film 9I! of the insulating member 9 to be closed. Holding down 1.

In the above configuration, electric heating 6 base S is connected to the terminal plates 7 and 8.
A current is passed through the heating wire 2C, and when the heating wire 2C reaches a certain temperature, the heating plate 2 is heated. The heat generated at this time is quickly conducted through the heat exchanger plate 1 or the heat diffusion plate 5 and is radiated from the peripheral wall 1C of the heat exchanger plate 1.

Therefore, when the heat exchanger plate 1 is used as a heat dissipation surface, the heat from the upper surface of the heat exchanger plate 2 is radiated from the heat exchanger plate 1, and the heat from the lower surface of the heat exchanger plate 2 passes through the heat diffusion plate 6 and is radiated from the heat exchanger plate 1. 10 Because it is quickly conducted to the peripheral wall 1C, the wire temperature of the heating wire 2C itself is significantly lowered, resulting in an extension of the durable life of the heating wire 2C. In addition, the thermal deformation and warping of each component that are often experienced in space type heaters are as follows: - The heat exchanger plate 1.
This is prevented because it is strongly held by the heat diffusion plate 6 and the back plate 6. Furthermore, when the durability is set to the same level as the conventional one, the power density (wy, 2) can be set high, and the size of the heating element can be made compact.

In addition, since the insulating member 9 presses the terminal plates 7 and 8 and the heating wire joint part, the temperature of the core part can be further reduced.
By preventing the terminal plates 7 and 8 from being oxidized, both of the bases 7 and 7 are prevented from being damaged by vibrations, external forces, etc., and the terminal plates 8 can be fixed to the heat generating plate 2.

As a result, the conventional manual method of forming lead wire portions by providing attachment wires can be abolished, and as shown in the embodiment, the terminal plate 7,
8, can be easily connected to tabs, plates, SUS nine wires, etc., wiring can be extremely simplified, and when used in electric heating appliances such as water heaters, it can reduce overall costs. It is.

As the heat exchanger plate 1 and the back plate 6, use of an 18-8 stainless steel plate, a ferritic stainless steel plate containing 13-18% chromium, and 0.6 to 2 thymolybdenum makes joining extremely easy. Further, the heat diffusion plate 6 may be made of any metal with good thermal conductivity such as aluminum, copper, brass, etc.

Effects of the Invention As described above, according to the present invention, effective heat dissipation is achieved by sandwiching the heat generating element between the heat transfer plate and the heat diffusion plate, and the temperature drop is prevented by preventing heat from accumulating in the heat generating element. The purpose of this invention is to extend the life of the heating wire, connect the terminal board to the heating board, and install the insulating screws 1, thereby providing a heating element of great industrial value as a heating element for electric heating appliances. =

[Brief explanation of drawings]

Fig. 1 is a rear perspective view of a heating element in an embodiment of the present invention, Fig. 2 is a front sectional view, Fig. 3 is a top view of the heating plate in the same heating element, and Fig. 4 is an assembly of the components of the heating plate. 6 and 6 are perspective views showing an applied embodiment of the present invention. 1... Heat transfer plate, 2... Heat generating plate, 6...
... Heat diffusion plate, 6 ... Rear plate, 7, 8-.
...Terminal board, 9...Insulating member. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 11 Questions 1983-230283 (4)

Claims (3)

[Claims] (1) A heat exchanger plate having a peripheral wall on the outer periphery, a heat diffusion plate and a back plate also having peripheral walls on the outer periphery, and a heating element having a heating wire is interposed between the main surfaces of the heat exchanger plate and the heat diffusion plate. The heating element is constructed by stacking a back plate on the outer surface of a heat diffusion plate, and stacking the peripheral walls of the heat transfer plate, the heat diffusion plate, and the back plate. (2) The heating element, the heat diffusion plate, and the back plate have a through hole in the center, and the edges of the through hole are brought into close contact with each other, and the edges of the peripheral wall of the heat exchanger plate and the peripheral wall of the back board are brought into close contact with each other. A heating element according to claim 1, comprising: (3) The heating element has a terminal plate and an insulating member surrounding the terminal plate, and a crotch seat portion formed on the outer periphery of the insulating member is held down by the edge of the outlet hole of the back plate. The heating element according to item 1.