JPS583263Y2 - heat generating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat generating device, and more particularly to a heat generating device in which a plurality of honeycomb-shaped positive temperature coefficient thermistor heating elements are combined.

A positive temperature coefficient thermistor (PTC thermistor) is a barium titanate-based semiconductor porcelain having a positive temperature coefficient of resistance, and it is possible to obtain any heat generation temperature by appropriately selecting the Curie temperature. It has remarkable features such as showing a rapid increase in resistance when the temperature is exceeded, and there is no risk of overheating.

For this reason, they have recently come to be used as various heat sources.

By the way, when used as a heat source that generates hot air such as a hair dryer or hot air dryer, a pellet-shaped positive temperature coefficient thermistor heating element does not generate enough heat, so a positive temperature coefficient thermistor with a large number of through holes is used. A honeycomb-shaped positive temperature coefficient thermistor heating element formed in the element is often used.

In this case, in order to increase the amount of heat generated, it is possible to increase the specific surface area by increasing the diameter or thickness of the honeycomb heating element (i), but it is possible to increase the specific surface area by increasing the diameter or thickness of the mister heating element. The shape of the heat generating device becomes larger, and simply increasing the thickness causes the oscillation phenomenon peculiar to positive temperature coefficient thermistors, making it impractical and increasing the amount of heat generated insufficiently.

In view of the above points, the present invention attempts to provide a heat generating device that increases the amount of heat generated by connecting and integrating a plurality of honeycomb-shaped positive temperature coefficient thermistor heating elements via a connecting member. .

Embodiments of the heat generating device according to the present invention will be described below with reference to the drawings.

1 and 2, the heat generating device includes a disk-shaped positive temperature coefficient thermistor element 1 with a large number of through holes 2, and ohmic or non-ohmic electrodes 3 on both sides of the through holes 2. A honeycomb-shaped positive temperature coefficient thermistor heating element 4A,
4B are connected and integrated using four connecting members 5 at regular intervals.

Here, honeycomb-shaped positive temperature coefficient thermistor heating elements 4A, 4B
The element thickness should be within the range of 2 to 8 mm, because if it becomes larger than about 3 mm, the characteristic oscillation phenomenon of a positive temperature coefficient thermistor will occur, and the heat generation efficiency will decrease, and if it becomes thinner than about 2 mm, the mechanical strength will be insufficient. Set.

As shown in FIG. 3, the connecting member 5 is a honeycomb-shaped positive temperature coefficient thermistor heating element 4A.

It is formed of an insulator having heat resistance and elasticity so as to have fitting recesses 10A and IOB that fit with the peripheral edge of the recess 4B, and a spacing protrusion 11 formed between these recesses.

Here, the opening interval of the fitting recess 10A and IOB is set to be somewhat smaller than the thickness of the heating elements 4A and 4B.

This is to enable the fitting recesses 10A and IOB to reliably and elastically hold the heating elements 4A and 4B.

Moreover, the said fitting recessed part 10A. 10B is heating element 4A, 4B
It is curved along the circumferential surface to match the circumferential surface of.

Therefore, if the fitting recesses 10A and IOB of the plurality of connecting members 5 are fitted into the heating elements 4A and 4B, respectively, both the total heating elements 4A and 4B
are reliably connected and integrated at regular intervals.

According to the above embodiment, the honeycomb-shaped PTC thermistor heating elements 4A, 4B can be held at a constant interval using the connecting member 5, so the structure is simple, and both the total heating elements 4A, 4B
The amount of heat generated can be significantly increased by connecting the
is possible.

Furthermore, the connecting member 5 can be easily made by integral molding of resin or the like, which is advantageous in terms of cost.

FIG. 4 shows another embodiment of the present invention, in which PTC thermistor heating elements 4A and 4B are connected and integrated using two connecting members 5A.

In this case, the connecting member 5A is the connecting member 5 formed with a wider width in the circumferential direction.

The effects of this embodiment are also the same as those of the previous embodiment.

In addition, by using a connecting member in which three or more fitting recesses are formed, three or more honeycomb-shaped PTC thermistor heating elements can be connected and integrated.

As described above, according to the present invention, there is obtained a heat generating device which aims to increase the amount of heat generated by a simple structure in which a plurality of honeycomb-shaped PTC thermistor heat generating elements are connected and integrated via a connecting member.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a heat generating device according to the present invention;
Fig. 2 is a sectional view of the same side, Fig. 3 is a perspective view of the connecting member, and Fig. 4 is a sectional view of the same side.
The figure is a perspective view showing another embodiment. ]...Positive characteristic thermistor element, 2...
Through hole, 3... Electrode, 4A, 4B...
Honeycomb shaped positive characteristic Mister heating element, 5,5A...
...Connection member.

Claims (1)

[Scope of utility model registration request] A plurality of fitting recesses that fit and elastically hold a plurality of honeycomb-shaped positive temperature coefficient thermistor heating elements into peripheral edges of the heating elements, and an interval formed between the recesses to provide a predetermined interval between the heating elements. 1. A heat generating device comprising a plurality of connecting members made of an insulator having heat resistance and elasticity and connected and integrated with a holding convex portion.