JPH0354437B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat generating device using a self-heating heater. For example, by rotating a fan, hot air heated by the self-heating heater having a positive resistance temperature characteristic is delivered to a drying material storage. It can be applied to clothes dryers that flow hot air into a rotating drum, exchange heat with the material to be dried, and then exhaust the air.It can improve productivity and serviceability by simplifying the mounting structure of the self-heating heater. The purpose is to increase the durability of self-heating heaters.

Traditionally, clothes dryers have generally used nichrome wire heaters as the heat source, but recently clothes dryers that use self-heating heaters with highly safe positive resistance temperature characteristics have been proposed. I've reached it. However, since self-heating heaters are made of ceramic material, they are vulnerable to external shocks.
In addition, unless the heater has a structure that can alleviate expansion and contraction caused by self-heating, the life of the self-heating heater itself will be shortened.

The present invention was made in view of the conventional problems,
The present invention aims to improve the heat resistance of the self-heating heater and to simplify the mounting structure of the self-heating heater.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In the figure, 1 is the main body of the device, which includes a rotating drum 2 that is rotatably supported.
A fan casing 3 is connected to the rear part of the rotating drum 2, and a fan 4 is rotatably arranged inside the fan casing 3. A driving motor 5 rotates the rotating drum 2 and the fan 4 by means of a V-belt 8 and a fan belt 9, which are respectively applied to a drum pulley 6 and a motor pulley 7, which are fixed to the rotating shaft.

Reference numeral 10 denotes a self-heating heater having a positive resistance temperature characteristic, which is composed of a drum support plate 11 which rotatably supports the inner peripheral edge of the front wall of the rotary drum 2 by its outer peripheral edge via a bearing member, and the front surface of the main body 1 of the device. It is appropriately fixed to the heater case 12 arranged between the two.

To explain the mounting structure of the self-heating heater 10 in more detail, the self-heating heater 10 has a substantially rectangular parallelepiped shape,
There are mounting holes 1 at both ends of this self-heating heater 10.
3, 13' are provided, and electrodes 15, 1 for energizing the heater are provided at both ends.
5' is provided.

The heater case 12 has a substantially rectangular hot air hole 16 facing the self-heating heater 10, and is integrally formed with mounting bosses 17 and 17' at both ends and a flange 18 on the outer periphery. . Mounting bosses 17, 17' of the heater case 12 are engaged with the mounting holes 13, 13' of the mounting frames 14, 14',
Moreover, the two are attached by tightening screws 20 with washers 19 interposed therebetween. The self-heating heater 10 is
A tightening margin is provided between one end of the mounting frame 14 and the upper end of the mounting boss 17 of the heater case 12, so that even if the length of the mounting boss 17 varies, the screw 20 can be tightened through the washer 19. It is firmly fixed, and the other end is inserted into the mounting hole 1 from the mounting frame 14'.
When the upper end of the mounting boss 17' is made to protrude through the upper end of the mounting boss 17' and the screw 20 is tightened through the washer, a gap in the vertical direction is formed between the upper end of the mounting boss 17' and the mounting frame 14'. Also, the outer circumference of the mounting boss 17' and the mounting hole 1
A gap in the left-right direction is also set between the inner edge of 3'. This gap size is to moderate the thermal expansion of the self-heating heater 10 when it generates heat and its contraction (in the direction of the arrow) when it is not energized.

In addition, 21 corresponds to a door that can be opened and closed, 22 corresponds to an intake filter, and 23 corresponds to the intake filter 22.
An intake slit formed on the front plate of the device body, 24 a ventilation hole provided in the drum support plate 11 to communicate between the interior of the rotating drum 2 and the self-heating heater 10 side, 25 a heater fixture, and 26 a rotating This is a wire mesh that prevents cotton dust from entering from inside the drum 2.

In the above configuration, the air taken in by the rotation of the fan 4 passes through the intake filter 22 of the door 21 and is taken in from the intake slit 23 on the front surface of the device body 1. This intake air is heated by the self-heating heater 10 and becomes hot air. This hot air enters the rotating drum 2 through the ventilation holes 24 of the drum support plate 11, exchanges heat with the clothes, and passes from the rear surface of the rotating drum 2 to the fan casing 3. and is exhausted to the outside of the device main body 1 by the fan 4.

According to the above embodiment, the mounting bosses 17 and 1 are integrally formed at both ends of the heater case 12, respectively.
7' and mounting frames 14 and 14' provided at both ends of the self-heating heater 10, respectively, since both ends of the self-heating heater 10 are attached so as to form a tightening margin and a gap. For example, since one side is fixed and the other side is movably attached with gaps in the vertical and horizontal directions, thermal expansion and contraction of the self-heating heater 10 can be easily alleviated in the gaps, and external shocks can be easily alleviated. It can also be protected by reducing the amount of damage caused by the gaps.

As is clear from the above description, according to the present invention, the life of the self-heating heater can be significantly improved, and a high-quality heat generating device can be provided.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a clothes dryer equipped with a heat generating device according to an embodiment of the present invention, Fig. 2 is an exploded perspective view showing the mounting structure of a self-heating heater in the heat generating device, and Fig. 3 is the same heat generating device. FIG. 10... Self-heating heater, 12... Heater case, 13, 13'... Mounting hole, 14, 14'... Mounting frame, 17, 17'... Mounting boss, 20... Screw.

Claims (1)

[Claims] 1 A mounting frame having a mounting hole is provided at each end of a self-heating heater having a substantially rectangular parallelepiped shape, and a heater case is provided to accommodate the self-heating heater, and a mounting boss is integrally formed on each end side of the heater case. One end of the mounting frame is fixed to the mounting boss by the screw passing through one of the mounting holes, and the screws passed through the other mounting hole and tightened to the mounting boss are fixed to the mounting frame with a predetermined vertical clearance. A heat generating device that is compatible with this and also has a gap formed between the outer periphery of the mounting boss and the inner edge of the mounting hole.