JPH0621193U - heater - Google Patents

Abstract

(57) [Summary] [Structure] A sheet-like closed case 2 made of a flexible synthetic resin, and a P-shaped case arranged in the case 2.
TC heating elements 1, ..., Lead wires 5, 5 connected to each PTC heating element 1 so as to energize and taken out of the case, and P
The case 2 has an electrically insulating liquid 3 filled in the case 2 so as to surround the TC heating elements 1. [Effect] Even if the heater is bent, the PTC heating elements 1 are energized via the lead wires 5 and 5, and the liquid 3 is heated by the self-temperature control function to generate heat at a predetermined temperature. As a result, a flexible planar heater can be realized by utilizing the PTC heating elements 1 ... From the positive temperature characteristic thermistor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heater using a PTC material (positive temperature characteristic thermistor) such as a barium titanate-based porcelain semiconductor as a heating element, and more particularly to a planar heater having flexibility.

[0002]

[Prior art]

 A heater that uses a PTC material with a self-temperature control function as a heating element has a simple structure, is small in size, and is unlikely to cause an accident such as abnormal heat generation, and has extremely high safety. Widely used.

[0003]

[Problems to be solved by the device]

 However, the conventional heater has a problem that it is not flexible because the PTC material made of hard ceramics is used as the heating element. Therefore, for example, even if an attempt is made to use the heater for a hot compress of a diseased part such as a stiff shoulder, the heater does not follow the affected part, so that the affected part cannot be heated efficiently.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the heater of the present invention includes a planar closed case made of a synthetic resin having flexibility, and a positive temperature characteristic thermistor arranged in the case in a plane-like manner. It consists of a plate-shaped heating element consisting of, a lead wire connected to each heating element to energize and taken out of the case, and an electrically insulating liquid filled in the case surrounding the heating element. It is characterized by

[0005]

[Action]

 According to the above configuration, a sheet-shaped closed case made of a flexible synthetic resin, a plate-shaped heating element made of a positive temperature characteristic thermistor and spaced apart in a plane in the case, Even if the heater is bent, it has a lead wire that is connected to energize each heating element and is taken out of the case, and an electrically insulating liquid that fills the case so as to surround the heating element. By energizing the heating element via the lead wire, the self-temperature control function can generate heat to a predetermined temperature and heat the liquid. As a result, it is possible to realize a flexible planar heater by utilizing a heating element from a positive temperature characteristic thermistor.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in the partially cutaway plan view of FIG. 1 and the vertical cross-sectional view of FIG. 2, the heater of this embodiment has a planar case 2 made of a synthetic resin having flexibility and a case. 2 has disc-shaped PTC heating elements 1 ... Arranged in a grid pattern, and an electrically insulating liquid 3 filled in a case 2 so as to surround the PTC heating elements 1.

Each PTC heating element 1 is manufactured, for example, by pressure-molding a material containing barium titanate as a main component, and silver electrodes are baked on both surfaces thereof. The silver electrodes on the upper surface and the silver electrodes on the lower surface of the PTC heating elements 1 ... Are connected by conducting wires 4 and 4, respectively. Therefore, the PTC heating elements 1 ... Are connected in parallel. Lead wires 5 and 5 are connected to the conductor wires 4 and 4, and these lead wires 5 and 5 are taken out of the case 2.

The above heater is specifically manufactured by the following procedure, for example.

On the vinyl chloride sheet, the PTC heating elements 1 to which the conducting wires 4 and 4 and the lead wires 5 and 5 are connected in advance are arranged in a grid pattern, and the vinyl chloride sheet is further placed thereon. Then, the upper and lower sheets are pressure-bonded at the peripheral edge portion 6a. However, since one portion of the peripheral edge portion 6a is used as the injection port 7 for the liquid 3, that portion is not pressure-bonded.

Then, the upper and lower sheets are pressure-bonded at the peripheral portions 6b of each PTC heating element 1 so that the PTC heating elements 1 ... Are not biased to one side of the case 2. At this time, the periphery of each PTC heating element 1 is not completely pressure-bonded, but a gap is opened so that the PTC heating elements 1 are not largely displaced laterally. When the electrically insulating liquid 3 such as silicon oil is injected from the inlet 7, the liquid 3 spreads throughout the case 2 through the gap. After pouring the liquid 3, the inlet 7 is crimped and sealed. The above pressure bonding is performed by ultrasonic heating, high frequency heating, or hot pressing.

In the above-mentioned configuration, when power is supplied to the lead wires 5 and 5, a current flows between the silver electrodes of the PTC heating elements 1 through the lead wires 4 and 4 to generate heat in the PTC heating elements 1 ... 3 is warmed. When the temperature of the heater rises near the Curie temperature of the PTC heating elements 1 ..., The electrical resistance of the PTC heating elements 1 ... increases rapidly. Therefore, the amount of heat generated is reduced, and the temperature of the heater is lowered. When the temperature decreases, the electric resistance of the PTC heating elements 1 ... Decreases again and the amount of heat generation increases. In this way, the heat generation temperature is self-controlled, so that the heater temperature can be kept constant.

Moreover, the heater according to the present embodiment is composed of a plurality of disc-shaped PTC heating elements 1 ... And the flexible case 2 supports the PTC heating elements 1 ... Since the current is supplied through the heater 4, the heater can be bent.

Moreover, since the case 2 is filled with the liquid, the entire heater warms up.

As a result, for example, when the heater of the present invention is used for a warm compress of a diseased part such as a stiff shoulder, the heater is flexed along the affected part to efficiently perform the warm compress. You can

The material for the case 2 may be any material as long as it has flexibility and electrical insulation and can withstand the heat generation temperature of the PTC heating element 1. Specifically, for example, vinyl chloride resin is used at an exothermic temperature of 60 ° C or lower, a silicone-based chemical tube is used at 100 ° C or lower, and heat-resistant silicone resin is used at 100 ° C or higher. it can. In addition, urethane resin or the like for electrical insulation may be used.

Silicon oil, for example, is used as the liquid 3, but any material can be used as long as it has heat resistance and high electric insulation.

[0018]

[Effect of device]

 As described above, the heater according to the present invention is a plate-shaped case made of a flexible synthetic resin and having a planar closed case, and a positive temperature characteristic thermistor spaced apart in a plane in the case. The heating element, the lead wires connected to each heating element to energize and taken out of the case, and the electrically insulating liquid filled in the case to surround the heating element Even when is bent, electricity is supplied to the heating element through the lead wire, and the self-temperature control function allows the liquid to be heated by generating heat at a predetermined temperature. As a result, there is an effect that a planar heater having flexibility can be realized by utilizing the heating element from the positive temperature characteristic thermistor.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a schematic configuration of a heater of the present invention.

2 is a vertical cross-sectional view of the heater of FIG.

[Explanation of symbols]

 1 PTC heating element (positive temperature characteristic thermistor) 2 Case 3 Liquid 4 Conductive wire 5 Lead wire

Claims (1)

[Scope of utility model registration request] 1. A sheet-like hermetically sealed case made of a flexible synthetic resin, a plate-like heating element made of a positive temperature characteristic thermistor arranged on the plane in the case, and each heat generation. A heater comprising: a lead wire connected to the body so as to energize and taken out of the case; and an electrically insulating liquid filled in the case so as to surround the heating element.