JPS589883B2 - Gas dryer control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a gas dryer, and in particular, the present invention relates to a control device for a gas dryer.
In order to prevent abnormal temperature rises inside the machine due to the drive power transmission belt to the hot air blowing fan coming off or breaking, or the wrong gas being used, etc., the system issues an alarm and shuts off gas combustion. The invention relates to a control device equipped with a circuit.

Conventionally, the driving force transmission belt of the blower fan broke during drying, propane gas was used instead of city gas, and the filter installed inside the machine was not cleaned for a long time. If the air conditioner becomes clogged, the temperature inside the aircraft will rise abnormally, and the thermostat connected in series with the gas combustion control circuit will open and close frequently. The temperature inside the aircraft gradually rose, posing the risk of adversely affecting electrical and organic components near the burner.

Previously, when the temperature inside the aircraft rose abnormally, a combination of a manual reset type thermoswitch and a relay was used to automatically shut off the gas passage. The price is high, and if the thermo switch is installed near the burner, abnormalities such as filter clogging are relatively likely to occur, and it will operate every time an abnormality occurs, and the machine will need to be disassembled and inspected each time. However, it has the disadvantage of being inconvenient to handle.

The present invention has been developed in view of the above-mentioned conventional drawbacks, and it combines a manually operated gas safety valve and a relay to prevent problems such as the fan drive belt coming off, the wrong type of gas being used, and the filter leaking. When a blockage occurs, the thermostat senses an abnormally high temperature near the gas burner, opens the circuit, cuts off power to the main gas valve and relay, and at the same time notifies the abnormality using an alarm device connected in parallel with the thermostat. It is.

Examples thereof will be described below with reference to the drawings.

In the figure, a timer 1 includes a gas control contact 2 and a blower drive contact 3.

An igniter 4, a thermostat 5 for preventing excessive temperature rise, and an alarm device 6 are connected to the timer contact 2, and a solenoid valve coil 7 for gas control and a relay 8 are connected to one thermostat of the thermostat 5 for preventing excessive temperature rise. Connected.

When the relay 8 is energized, the contact 9 is closed, and when the flame of the pipette burner hits the thermocouple 10 and a thermoelectromotive force is generated, a magnetic force is generated in the safety valve coil 11.

Generally, the safety valve coil 11 does not have enough power to open the valve by itself with only the voltage of thermoelectromotive force, so manually operate it to attract it, and when the burner is burning, the thermocouple 11
It self-maintains with the electromotive force of .

In addition, the solenoid valve coil γ is connected to the temperature control thermostat 12.
are connected in series, and the thermostat 12 senses the temperature inside the machine and opens and closes it to keep the drying temperature constant.

Here, the contact 9 of the relay 8 is a normally open contact, and is connected to the thermostat 5 for preventing excessive temperature rise and the thermostat 1 for temperature adjustment.
2 is a normally closed contact, and when the timer 1 is set, the electromagnetic valve coil 7 is energized, this valve opens, and the safety valve circuit is opened and closed.

Figure 2 shows the gas distribution system and shows the safety valve 13.
is equipped with a manual cock that opens and closes the gas circuit, and is also equipped with a safety valve coil 11, and the gas circuit is opened by the electromotive force of the thermocouple 10 during combustion in the pilot burner 14.

When the pipe burner 14 is extinguished or the thermocouple 10 and safety valve coil 11 are rotated or closed, the gas circuit is closed.

In other words, these constitute a safety device.

In addition, as shown in FIG. 2, the main burner 15 has a safety valve 13
The solenoid valve 16 is connected in series with a solenoid valve 16 having a solenoid valve coil I, and the solenoid valve 16 is energized and closed by a thermostat 12 to maintain a constant temperature inside the aircraft, and also to maintain safety. Thermocouple 1 applied to valve coil 11
It closes when the electromotive force of 0 is extinguished.

Reference numeral 1T is a motor for driving an air blowing fan that sends heat generated by the main burner 15 into the drying chamber, and at the same time drives a rotary drum constituting the drying chamber to rotate via a belt.

In the above configuration, when the dryer is operated, clothes are put into the dryer and timer 1 is set, and then the blower mortar 17 is energized, the blower fan blows air, and the air inside the dryer is discharged.

On the other hand, when the gas control circuit connected to the contact 2 side is energized, the relay 8 is energized and the contact 9 is closed.

By operating the safety valve 13, the pipe burner 14 is ignited, and the electromotive force of the thermocouple 10 causes the safety valve coil 1 to be ignited.
1 or 1 self-holding, and after confirming combustion of the pipe burner 14, turning the knob of the safety valve 13, the main burner 15 is ignited and burned.

During operation, if the fan belt breaks or comes off, if the filter becomes clogged and the amount of air blown decreases, or if the wrong type of gas is used, the temperature near the burner may become abnormal. When the temperature rises, the overtemperature rise prevention thermostat 5 opens, and since an alarm means 6 such as a buzzer is connected in series with the solenoid valve coil 7, a blowing sound or the like is generated to notify this.

Here, the resistance of the solenoid valve coil 7 is set to be extremely smaller than the resistance value of the coil of the relay 8, and since the solenoid valve coil 7 and the relay 8 are connected in parallel, the current is applied to the relay 8. There is almost no flow, contact 9 is opened and the gas circuit is interrupted.

As described above, according to the present invention, it is possible to prevent abnormal overheating inside the machine, and to issue a warning immediately before an abnormality occurs, so the control of a gas dryer equipped with an extremely safe combustion control circuit is possible. equipment can be provided.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram of a gas dryer according to an embodiment of the present invention, and FIG. 2 is a schematic diagram showing the gas distribution system. 1... Timer, 5... Thermostat for preventing excessive temperature rise, 6... Alarm means (buzzer), 7... Solenoid valve coil, 8
... Relay, 11 ... Safety valve coil, 10 ... Heat transfer couple, 13 ... Safety valve, 14 ... Piece burner,
15...Main burner, 16...Solenoid valve, 17...Moke for fan drive.

Claims (1)

[Claims] 1. A parallel circuit consisting of a relay and a coil of a solenoid valve that controls gas supply to the main burner is connected between the power sources via a thermostat for preventing overtemperature rise, and the relay is connected in series to the solenoid valve. A coil of a safety valve is connected, an alarm means is connected in parallel to the thermostat, and either one of the parallel circuit side of the solenoid valve and the relay, and a moke for driving a fan that blows air to the main burner side. A control device for a gas dryer, characterized in that a timer is provided with a contact for energizing.