JPS6323903Y2 - - Google Patents

Description

[Detailed description of the invention] In a clothes dryer, when the amount of intake air decreases due to clogging of the lint collection filter, the self-heating heater, which has a positive resistance temperature characteristic, becomes abnormally high temperature, and the electric current holding the heater becomes abnormally high. There is a risk that the heater mounting frame made of insulating synthetic resin may be deformed.

In the present invention, a thermostat, which is a safety device, is provided on the intake side of the heater, where there is a large temperature difference between normal times and when the intake air amount decreases, and the temperature sensing part of the thermostat is formed only on the surface facing the heater. This system detects clogging of the clothes dryer's lint collection filter more quickly and stops the machine.

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, a rotating drum (hereinafter simply referred to as a drum) is rotatably supported in the main body 1 of the device.
2, an intake fan 4 rotating inside a fan case 3 is provided behind the drum 2, and a drive motor 5
Drum pulley 6 and motor pulley 7 are attached to the rotating shaft of
is fixed, and the drum 2 is
and the fan 4 rotates.

Reference numeral 10 denotes a self-heating heater having positive resistance-temperature characteristics, which is appropriately fixed in a heater case 12 disposed between a drum support plate 11 that rotatably supports the drum 2 and the front surface of the main body 1 of the device. A bearing 1 for rotationally supporting the drum 2 is provided on the outer periphery of the drum support plate 11.
3, and a large number of ventilation holes 14 are provided behind the self-heating heater 10 to allow hot air to flow into the drum 2.

Reference numeral 15 denotes a lid that can be opened and closed to cover the clothing slot 16, and is sealed by bringing the circular protrusion 19 of the lid 15 into contact with a packing 18 provided on a circular flange 17 forming the clothing slot 16 on the front side of the main body 1. , lid 1
A large number of intake ports 20 are formed in the lower part of the lid 15 facing the self-heating heater 10, and a removable intake filter 21 is provided inside the lid 15. Connecting ribs 22
A lid packing 23 is fixed to the rib 22 and brought into contact with the device main body 1 to form an air intake path.

Here, the temperature sensing part 30a of the thermostat 30, which is set to stop the operation of the dryer at a certain temperature, is formed on the intake side of the heater 10 only on the surface facing the heater 10, and the thermostat of the heater case 12 is mounted. It is fixed to the portion 12a with screws 31. On the front side of the heater 10, a heater protection plate 25 provided with a large number of intake slits 24 is fixedly arranged on the front side of the main body 1 of the device. When the heater protection plate 25 is removed, the thermostat 30 is exposed, so that it can be removed by operating from the front. 26 is a magnet fixed to the lid 15;
Opposed to this, a suction plate 27 is provided on the front surface of the device main body 1. In the figure, 28 is a filter detachably provided on the rear surface of the drum 2, and 29 is a fan case 3.
This is an exhaust guide connected to the

In the above configuration, the air taken in by the rotation of the fan 4 passes through the intake port 20 of the lid 15 and the intake filter 21, and passes through the intake path sealed by the packing 18 and the lid packing 23,
Air is taken in through the intake slit 24 of the heater protection plate 25. The hot air heated by the self-heating heater 10 enters the drum 2 through the ventilation hole 14 of the drum support plate 11, and exchanges heat with the items to be dried such as clothes.
The air passes through the fan case 3 from the rear surface of the drum 2 and is exhausted to the outside of the device body 1 by the fan 4.

During normal use, cold air passes through the intake side of the heater 10, so the temperature sensing portion 30a of the thermostat 30 is at a low temperature.

By the way, if the filter 28 is abnormally clogged, the amount of intake air decreases, cold air no longer passes through the heater 10, and the intake side of the heater 10 becomes high in temperature as well as the exhaust side. As a result, the temperature of the temperature sensing portion 30a of the thermostat 30 rises rapidly, causing the aircraft to stop.

In this way, the present invention attaches the thermostat to the intake side of the heater, where there is a large temperature difference between normal times and when the intake air amount decreases, and forms the temperature sensing part of the thermostat only on the surface facing the heater. It is now possible to stop the aircraft more quickly in the event of abnormal clogging, and the heater case can be made of electrically insulating synthetic resin, significantly improving safety.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a clothes dryer according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the vicinity of the heater and intake filter, Fig. 3 is a front view showing the installation of the thermostat, and Fig. 4 is FIG. 5 is a front view of the clothes dryer with the lid closed, and FIG. 5 is a front view when the lid is opened and the heater protection plate is removed. DESCRIPTION OF SYMBOLS 1... Equipment body, 2... Rotating drum, 4... Fan, 10... Self-heating heater having positive resistance temperature characteristics, 12... Heater case, 25... Heater protection plate, 30... Thermostat, 30a...
Temperature sensing part.

Claims (1)

[Scope of utility model registration request] A certain operation is performed in a clothes dryer in which hot air heated by a self-heating heater having a positive resistance temperature characteristic flows into a rotating drum due to the rotation of a fan, exchanges heat with the material to be dried, and exhausts the air outside the rotating drum. A safety device for a clothes dryer, in which a thermostat set at a certain temperature is attached to the intake side of the heater, and a temperature sensing part of the thermostat is formed only on the surface facing the heater.