JPS59160991A - Positive temperature coefficient thermistor device - 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 the Invention The present invention relates to a positive temperature coefficient thermistor device in which a plurality of perpendicular positive coefficient thermistors are arranged in the same case.

This type of positive temperature coefficient thermistor device is used, for example, as a heat source for irons and the like.

The general structure of a prior art positive temperature coefficient thermistor is, for example, as shown in FIG. It has a flat structure. For example, when a positive temperature coefficient thermistor with a bending structure is used as a heat source for an iron, etc., it is necessary to use several lamps in parallel, as one lamp alone is insufficient for generating heat. be. The twenty-first line 1 shows an example of a conventional positive temperature coefficient thermistor device 19 using a plurality of positive coefficient thermistors. In this conventional example, several positive temperature coefficient thermistors 4 have recesses i that engage with the positive coefficient thermistors 4 on both sides.
? It has a structure in which a metal plate 6.6 with a ratio of 1+5 to 1 is arranged, its periphery is insulated by an insulating ring 7, and the metal plate 6.6 is housed in a case 8. The upper surface of the case 8 is closed by a heat sink 10 with a heat-resistant insulating plate 9 in between.9. (It is shi.

Disadvantages of the Prior Art However, the conventional positive temperature coefficient thermistor device represented by FIG.
6, the heat generation amount and heat generation temperature are fixed and cannot be variably adjusted. For this reason, it could not be used in products that require variable adjustment of the heat generation temperature, such as irons.

Purpose of the Invention Therefore, the present invention eliminates the above-mentioned drawbacks of the conventional technology and easily changes the amount of heat generated and the temperature of the heat generated by cutting off the electrical connections between the electrodes of a plurality of hourly thermistors. An object of the present invention is to provide a positive temperature coefficient thermistor device which is suitable for use as a heat generating source such as an iron.

Structure of the Present Invention In order to achieve the objects described above, the present invention provides a positive temperature coefficient thermistor device in which a plurality of flat plate-shaped positive coefficient thermistors are disposed in the same case. The Curie temperature of all or some of the IL characteristic thermistors is made to be different, and at least one of the electrodes of the plurality of IL characteristic thermistors is led out to the outside of the storage case.

Embodiment FIG. 3 is an exploded perspective view of a PTC thermistor device according to the present invention, FIG. 4 is an exploded perspective view of the PTC thermistor device during assembly, and FIG.
The figure is a perspective view after assembly is completed. In the figure, 11 is a storage case made of a highly heat-resistant insulating resin such as ceramic or polyethylene terephthalate;
15 is a plurality of i1 installed in this storage case ll.
': # thermistor, 16-19 are electrode terminals that are in contact with the electrodes of the positive temperature coefficient thermistors 12-15.

The storage case 11 has a protrusion 11 projecting at an appropriate length at the center of the bottom thereof, and this protrusion 11
Recesses 112 to 115 are provided around 1 for individually positioning the positive temperature coefficient thermistors 12 to 15. In addition, a side wall portion 11 continuously provided around the bottom of the storage case 11
No. 6, near the recesses 112 to 114, there is an electrode terminal 1
Notches 117 to 120 are formed to lead out the parts 6 to 19 to the outside of the storage case 11.

Each of the positive temperature coefficient thermistors 12 to 15 has ohmic or non-ohmic contact electrodes (1
21,122), (131,132), (14,1,1
42) and (151, 152) are deposited.

All or part of the plurality of PTC thermistors 1.2 to 15 have different Curie temperatures. For example, each Curie temperature T12 of the PTC thermistors 12 to 15 is different from each other.
, T13, T14, TI5 as 1, T12≧T13>T
The selection is made as follows: I4>T T5. In addition,
The number of positive temperature coefficient thermistors 12 to 15 is not limited to four.

The electrode terminals 16 to 19 are made of a metal material 1 having spring properties and excellent conductivity, such as stainless steel, ♀I1, or phosphor bronze. Among the electrode terminals 16 to 19,
The electrode terminals 16 to 18 have curved portions 16 for obtaining spring properties.
It has a structure in which lead terminal parts 162, 172 and 182° are connected to 1.171 and 181, respectively. The electrode terminals 16 to 18 have curved portions 161, 171 and 181.
are located in the recesses δB 112 to 115 of the storage case 11, respectively, and the extraction terminal portions 162, 172 and 182 are inserted into the outside of the storage case 11 through the notches 117, 118 and 11'9 provided in the side wall portion 116. Derived as follows. Therefore, as shown in FIG. 4, when the 11-characteristic thermistors 12-15 are arranged 17 in the recesses 112-115 and M1 is erected, the electrodes 121, 131 formed on the lower surfaces of the positive-characteristic thermistors 12-15 .141 and 151, the curved portions 161.1'71 and 181 of the ``1''E electrode terminals 16 to 18 are individually press-contacted, and the storage case 11 is connected by the lead-out terminal portions 162, 172 and 182. A terminal structure is formed which is individually led out to the outside.

On the other hand, the electrode terminal 19 is
At the edge of the flat plate part 191 having a thousand faces approximately equal to the area,
A terminal portion 192 that enters a notch 120 provided in the side wall 116 of the storage case 11 and two to three fixing bending pieces 193 are integrally arranged in series, and a projection is provided at the center portion of the bottom of the storage case 11. It has a structure in which a hole 194 for depositing metal is formed in l11.

When assembling, as shown in Figure 4, the storage case 11
After arranging the electrode terminals 16 to 18 and the stop characteristic thermistors 12 to 15 at predetermined positions within the
15, the electrodes 122 to 152 on the side of
The flat plate portions 191 of 9 are commonly opposed to each other, and the terminal portion 192
is fitted into the notch 120, and a pressing force is applied to bend and fix the fixing bending piece 193 extending along the side wall portion 161 of the storage case 11 to the bottom outer surface thereof, by bending it onto the bottom outer surface. As a result, the positive temperature coefficient thermistors 12 to 15 receive the elastic force of the electrode terminals 16 to 18, and are elastically held between the electrode terminals 19 and the bottom surface of the storage case 11, so that the assembly shown in FIG. The structure of the positive temperature coefficient thermistor device is completed.

FIG. 6 is an electric circuit connection diagram of the positive temperature coefficient thermistor device according to the seventh embodiment, in which one of the electrodes 122 to 152 of the positive coefficient thermistors 12 to 15 are connected to each other by an electrode terminal 19 which is commonly opposed to the positive temperature coefficient thermistor device. and the other 'rgpf
1121 to 151 are individually led out by electrode terminals 16 to 18 that individually contact these. In this embodiment, the '+4 poles 121 and 131 of the positive temperature coefficient thermistors 12 and 13 are connected to the common electrode terminal 1.
6, the positive characteristic thermistors 12 and 1
3 has a configuration in which they are electrically connected in parallel.

In this example, it is a positive thermistor. An electrode terminal 19 is commonly brought into contact with the electrodes 122-152 of the electrodes 12-15, and electrode terminals 16-18 are brought into contact with each of the other electrodes 121-151 individually.
is led out to the outside of the storage case 11, so by switching the electrical connections of the electrode terminals 16 to 19 phase V led out to the outside of the storage case 11, the surface temperature and heat generation amount of the electrode terminal 19 can be varied. be able to. For example, as shown in FIG. 7, the electrode terminals 16 to 18 are connected in common. L,
When the positive temperature coefficient thermistors 12 to 15 are driven in parallel by connecting the power supply e between this and the electrode terminal 19 that commonly faces the positive temperature coefficient thermistors 12 to 15, 11
The calorific value is obtained by summing the calorific value of each of the positive characteristic thermistors 12 to 15, and the temperature of the electrode terminal 19 is the Curie temperature T12, T13, T14 of the positive characteristic thermistors 12 to 15.
, T15, it is stable at a temperature dependent on the highest Curie temperature. That is, as shown in this embodiment, the Curie ji! of the positive temperature coefficient thermistors 12 to 15! degree T12, T13,
When T14 and TI5 are selected such that T12≧T13>T14>T15, the temperature of the electrode terminal 19 is stable at a temperature that depends on the Curie temperature TI2 of the positive temperature coefficient thermistor 12, which is also at a high temperature. do.

Next, as shown in FIG. 8, the electrode terminal 17 and the electrode terminal 18
and a power source e between this and the electrode terminal 16.
When connected, the parallel connection circuit of the positive temperature coefficient thermistor 12 and the IF characteristic thermistor 13, and the positive coefficient thermistor 1
4 and a parallel connection circuit of the positive temperature coefficient thermistor 15 are connected in one column. In this case, the silk positive temperature coefficient thermistors 12 and 14 having a high Curie temperature act as fixed heaters, and the temperature of the electrode terminal 19 is determined by the Curie temperature T14 of the set of stop coefficient thermistors 14 having a low Curie temperature. Stabilize.

Further, as shown in FIG. 9, positive temperature coefficient thermistors 12 and 1
When the power supply e is connected between the electrode terminal 16 of No. 3 and the 'it electrode terminal 18 of the positive temperature coefficient thermistor 15, the positive temperature coefficient thermistors 12 and 13 operate as fixed heaters, and the temperature of the electrode terminal 19 becomes positive temperature. Temperature T of thermistor 15
It is stabilized by the Sen that depends on 15.

According to the present invention, in addition to increasing the heat generation amount, the stable temperature can be easily controlled in stages by changing the electrical connection of the electrode terminals 16 to 19 phases 77-. be able to. For this reason, like an iron, etc., the temperature is set to ``T''.
It is therefore possible to realize a 1l-Iilf thermal protection device suitable for applications requiring changes.

Next, we conducted an experiment and determined the amount of heat generated by the JT Misumi +1-thermisk device, which is related to the present invention, and 1 crystal 1q.
January will be explained in more detail.

(a) Specification of prefectural characteristic thermistor Positive characteristic thermistor 12 and 13 Curie-1! ! Degree T12, T13 240°C resistance
400Ω Shape Disc Diameter 16.5mm, Thickness 2mmmm Positive Sign Thermistor 14 Lee 1M11 Negative T14 150°C Resistance 180Ω Shape Disc Diameter IB, 5mm, Thickness 2mm 1F Characteristic Thermistor 15 Curie Temperature T15 90°C Resistance
180Ω Shape 'Aj< Disc diameter 1t3, 5mm, thickness 2mm (b) Electrode terminal specifications Electrode terminal 16 Stainless steel plate Thickness 0.3mm17
Stainless steel plate 0.25mm thick 18° Stainless steel plate J height Q, 25mm 19 Copper plate 0.5 thick
mm (c) Storage case specifications Material Plasticine (PET) Shape 4
A positive temperature coefficient thermistor device according to the present invention is configured with component specifications of 0 x 40 x'5 m/m or more, and electrode terminal 1
85XI on the surface of 9 with alumina insulation sheet I in between.
C) Aluminum heat load plates of 2×3 m/m were stacked.

Then, in each connection state shown in FIGS. 7 to 9, the power source e
Apply AClooV and 240■ as current and aluminum. The surface stable temperature of the ram heat load plate was detected. 1st
The A111 constant data is shown in FIGS. 0 to 13. 10th
The figure shows the current one-hour characteristics when the power supply e is 100V.
FIG. 11 similarly shows the one-hour characteristic of the surface temperature, FIG. 12 shows the one-hour characteristic of the current when the power supply e is set to 240 cm, and FIG. 13 similarly shows the one-hour characteristic of the surface temperature. Further, the curve All in FIGS. 10 and 12 is the characteristic in the connection state of FIG. 7, the curve A12 is the characteristic in the connection state of FIG. 8, and the curve AI3 is the characteristic in the connection state of FIG.
Each shows f-character. Furthermore, the curve Bl+ in FIGS. 11 and 13 is the connection shape in FIG. 7! Surface temperature at 4
The 1111 line B12 shows the surface temperature characteristic in FIG. 8, and the curve B13 shows the surface temperature 4 characteristic in FIG. 9.

As is clear from Figures 10 and 11, in the connection state shown in Figure 7, the power consumption at thermal equilibrium is 32.0W and the surface temperature is 174°C, while in the connection state shown in Figure 8, the power consumption is 1.
7. At 0W, the surface temperature is 114°C, and in the connection state shown in Figure 9, the power consumption is 9. The surface temperature is 76°C in OW. That is, as shown in FIGS. 7 to 9, the electrode terminals 16 to
19 By changing the mutual electrical connection, the amount of heat generated and the temperature of the heat generated can be varied in stages.

Effects of the Present Invention As described above, the present invention includes a plurality of flat positive temperature coefficient thermistors arranged in the same case, and a plurality of i1': , the Curie temperature of all or some of the thermistors with a positive characteristic is made to be different, and at least one of the electrodes of the plurality of positive temperature coefficient thermistors is led out to the outside of the storage case. Therefore, it is possible to easily change the amount of heat generated and the temperature of the heat generated by changing the electrode phase force of a plurality of characteristic thermistors. A positive temperature coefficient thermistor device suitable for use as a power source can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the general structure of a PTC thermistor, FIG. 2 is a sectional view of a conventional PTC thermistor device j6, and FIG. 3 is an exploded perspective view of a PTC thermistor device according to the present invention. 4V is also an exploded perspective view of G during assembly, 5th
The figure is a perspective view after assembly is completed, FIG. 6 is an electric circuit connection diagram of the PTC thermistor device according to the present invention, and FIGS. 7 to 9 are diagrams showing the connection state of the electrode terminals. 1st
0 to 131N show measurement data of a positive temperature coefficient thermistor device according to the present invention, and FIG.
Figure 11 shows the current-storage characteristics when Each shows hourly characteristics. 11Fist e・Storage case 12-15...Positive characteristic thermistor 16-19...Electrode terminal 1 11111 Figure 1 Figure 2 Blank Figure 4 Figure 5 Figure 7 Figure 6 Figure 8 2 Figure 9 Time M 伜) Figure 12 Time Close (勺

Claims (2)

[Claims] (1) In a positive temperature coefficient thermistor device in which a plurality of flat positive temperature coefficient thermistors are installed together in the same case, the Curie temperatures of all or some of the plurality of positive coefficient thermistors are made to differ, Is at least one of the electrodes of the plurality of monomorphic thermistors outside the storage case?
1: Characteristic thermistor device. (2) A common electrode terminal that commonly faces the electrodes on one side of the plurality of positive temperature coefficient thermistors, and a common electrode terminal that individually faces the electrodes on the other side of the plurality of IF characteristic thermistors, and of the case. The positive temperature coefficient thermistor device according to claim 1, further comprising a plurality of electrode terminals led out to the outside.