JPS6264085A - Positive temperature coefficient thermistor - 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 Field of Industrial Application The present invention relates to a positive temperature coefficient thermistor device which is a constant temperature heating element to which a positive coefficient thermistor is applied for use in consumer and industrial equipment.

2. Description of the Related Art Conventionally, this type of positive temperature coefficient thermistor device has had a configuration as shown in FIG. In Fig. 3, 1 is a disc type positive temperature coefficient thermistor (hereinafter referred to as a positive coefficient thermistor), 2 is a positive coefficient thermistor element, 3 is an electrode, 4 is a terminal, 6 is an insulating tube, 6 is a case (conductor), 7 is a positive temperature coefficient thermistor. is the embedding resin. This is the 1 heating element device of Utility Model Application Publication No. 116497/1983.
The positive temperature coefficient thermistor 1 is inserted into a heat-resistant insulating tube 6 of an appropriate shape, housed in a case 6, and fixed by injecting heat-resistant embedding resin 7.

Problems to be Solved by the Invention In such a conventional configuration, the embedded resin 7 and the insulating tube 5 impede heat transfer, resulting in poor heat generation efficiency and thermal response, and problem 3: the product price is high. It had 7 issues.

The present invention solves these problems by sensitively and quickly sensing changes in ambient temperature and applied voltage, responding quickly, and stabilizing the temperature of the heated object at the target temperature. An object of the present invention is to configure and provide a positive temperature coefficient thermistor device.

Means for Solving the Problem In order to solve this problem, the present invention forms a counter electrode on a positive temperature coefficient thermistor, and a lead wire is soldered or glued to the first electrode of the counter electrode. conductive and fixed,
These are housed and fixed together with an adhesive in an insulating case having a small hole for leading out the lead wires so that the second electrode surface faces the opening side of the insulating case. Also, by forming the lead wire and creating a stopper on the lead wire itself,
The lead wire is inserted into the small hole of the insulating case, and the forming part contacts the small hole to position the lead wire at a prescribed position. Then, an appropriate amount of insulating adhesive or conductive adhesive is injected, a positive temperature coefficient thermistor is housed, and these are fixed at the same time.

At this time, it is desirable to use materials with poor thermal conductivity for the adhesive and the insulating case, and it is desirable that the insulating case has strong mechanical strength, resilience and elasticity even when pressurized.

The present device is configured as described above.

Function: With this configuration, the positive temperature coefficient thermistor itself comes into direct contact with the object to be heated, so that heating can be carried out efficiently without any hot water leaking. As is well known, a PTC thermistor is a heating element that has a self-temperature control function, so the PTC thermistor of the present invention, in which the second electrode surface of the PTC thermistor is in direct contact with the heated object, is sensitive to changes in the temperature of the heated object and the surrounding environment. It responds quickly to changes (ambient temperature, applied voltage, etc.) and keeps the heated object at a constant temperature under its own control. For example, when the temperature is low or the voltage is low, it consumes a large amount of power and the amount of heat generated increases, and when the temperature is high or the voltage is high, the amount of heat generated is reduced to prevent overheating.

Embodiment 6 Page 1 FIG. 1 is a perspective view of a positive temperature coefficient thermistor device according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof. Figure 1,
In FIG. 2, one of the opposing electrodes 9 of the positive temperature coefficient thermistor 8 has a lead wire 10 conductively fixed thereto by soldering or adhesive 13, and a small hole 12 through which the lead wire 1o is led out. The electrode 9 is housed and fixed together with the adhesive 13 in the insulating case 11 so that the other side of the electrode 9 is parallel to the opening side of the insulating case 11. At this time, the lead wire 10 is appropriately formed in advance, and the lead wire 1o
The lead wire 10 is placed in an insulating case 11 having a small hole 12 for leading out the lead wire, and is positioned and fixed to the small hole 12 and the inner wall surface of the insulating case 11 by forming. Make sure that it does not come off even if one end is pulled, then inject an appropriate amount of insulating or conductive adhesive 13, store the positive temperature coefficient thermistor 8, and connect the insulating case 11, lead wire 10, and positive temperature coefficient thermistor 8 with the adhesive. 13 may be fixed at the same time. Furthermore, when the positive temperature coefficient thermistor 8 is made to protrude slightly from the vane surface of the opening 6 of the insulation case 11 and is fixed to a heated object through the hole 14 of the insulation case 11 with screws or rivets, the elasticity of the insulation case 11 causes the positive temperature coefficient thermistor 8 to It is preferable to press the 16 is its protrusion.

Effects of the Invention As described above, according to the present invention, it is possible to provide a positive temperature coefficient thermistor device that has extremely good thermal responsiveness, excellent heat generation efficiency, has a simple configuration, is inexpensive, and is easy to handle.

Furthermore, by making the positive temperature coefficient thermistor element into a chip, it is possible to construct a compact device, so the device of the present invention is even more effective in heating devices that require small space and must be mounted on live parts. You can expect it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a PTC thermistor device according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view showing a conventional PTC thermistor device. 7 base / 8...Positive characteristic thermistor, 9...Counter electrode, 10...Lead wire, 11...Insulation case, 12...Small hole , 13...adhesive,
14... hole, 16... protruding part O Name of agent Patent attorney Toshio Nakao and 1 other person 2nd
Figure ys-w7> Figure 3

Claims (3)

[Claims] (1) Lead wires are conductively fixed to the first electrode of the opposing electrodes of the PTC thermistor by soldering or adhesive, and these are placed with adhesive in an insulating case having a small hole through which the lead wires are led out. A positive temperature coefficient thermistor device that is housed and fixed so that the second electrode surface is on the side of the case opening. (2) An insulating case with a small hole for leading out the lead wire,
2. A positive temperature coefficient thermistor device according to claim 1, wherein a formed lead wire is appropriately inserted, an appropriate amount of an insulating adhesive or a conductive adhesive is injected, a positive temperature coefficient thermistor is housed, and the positive temperature coefficient thermistor is fixed at the same time. (3) A positive temperature coefficient thermistor device according to claim 1 or 2, wherein the second electrode protrudes by an appropriate amount from the opening surface of the insulating case.