KR101063584B1 - Ignition time reduction device and method for gas dryer - Google Patents

Abstract

The present invention relates to an apparatus and a method for shortening the ignition time of a gas type dryer to shorten the ignition time in a gas type dryer, one end of which is connected to a power supply stage (L1) and an igniter for igniting fuel gas, and one end of the igniter. The salt detection unit is connected to the other end of the salt and is normally in the 'closed' state and is switched to the 'open' state when detecting the salt of the igniter, and one end is connected to the other end of the salt detection unit, and the other end is the power supply terminal (N). In the gas dryer equipped with an overheat prevention thermostat and a first and second valves, which are normally in a 'closed' state and switched to an 'open' state when an overheat is detected, one end is connected to the salt detection unit and the other side. One end of the relay RLY2 connected to the thermostat and the on-state of the first valve in the initial stage of ignition is detected so that the remaining air in the pipe is discharged. A microcomputer controlling the on / off of the ray RLY2 and controlling the operation of the igniter, the first and the second valves, a holding relay RLY5 having one end connected to the first valve and the other end grounded; A capacitor C1 connected to the holding relay RLY5, a switch interlocked with the holding relay RLY5, and a power supply to the first and second valves according to a connection state of the switch; It is composed of a rectifying part, and during initial operation, by removing the gas and air remaining in the gas pipe before ignition, it is possible to make ignition possible with a single attempt, and accordingly, the ignition time can be shortened by 50 ~ 80%. There is also an effect that can increase productivity by reducing the time required.

Gas Dryer / Valve / Ignition Shortening

Description

Method and apparatus for reducing ignition time of gas type dryer {Method and apparatus for saving start time of gas type dryer}

1 is a circuit diagram showing a gas dryer according to the prior art

2 is a flow chart showing a ignition method of a gas type dryer according to the prior art.

Figure 3 is a circuit diagram showing a device for reducing the ignition time of the gas dryer according to the present invention

Figure 4 is a flow chart showing a method for shortening the ignition time of the gas dryer according to the invention

Explanation of symbols for main parts of the drawings

100: microcomputer 110: the first relay. Start relay (RLY1)

120: igniter 130: thermostat

140: rectifier 150: second valve

160: first valve 170: photo coupler (PC)

180: fifth relay, holding relay (RLY5)

180 ': switch 200: flame detection unit

210: temperature sensor 220: third relay (RLY3)

230: motor 240: second relay RLY2

The present invention relates to a dryer, and more particularly, to an apparatus and method for shortening the ignition time of a gas type dryer to shorten the ignition time in a gas type dryer.

In general, a dryer generates electricity by heating a wire such as a coil by using electricity, and the outside air is heated through the heating wire to circulate the inside of the dryer so that the clothes are dried inside, and the outside air is heated by gas combustion. There is a method of drying the clothes by circulating in.

Hereinafter, a valve driving apparatus of a gas type dryer according to the prior art will be described with reference to the accompanying drawings.

1 is a circuit diagram showing a gas dryer according to the prior art, Figure 2 is a flow chart showing the ignition method of the gas dryer according to the prior art.

As shown in FIG. 1, the valve driving apparatus of the gas dryer according to the related art includes a microcomputer 10 which outputs a combustion start signal for supplying warm air into the dryer according to a user's operation command, and is normally open. Start relay (RLY1) 20 and the start relay (RLY1) which are in the state NO and are switched to the closed state according to the combustion start signal of the microcomputer 10 and supply power through the 'L1' terminal. When the power is supplied through 20 and the igniter 30 for igniting the fuel mixed with gas and air is normally in a 'closed' state and the salt of the igniter 30, that is, the flame is detected, The salt detection unit 40 is switched to the open state, the thermostat 50 is normally in the 'close' state and is switched to the 'open' state when the overheat is detected, and the first valve 80 for fuel supply. And second valve 70, the start The first valve 80 and the second valve are rectified by rectifying the power supplied through the intermediate node of the relay RLY1 11 and the igniter 30 and the intermediate node of the salt detection unit 40 and the overheat prevention thermostat 50. A photo coupler 60 for transmitting the output of the rectifying unit 90 and the salt detecting unit 40 to the valve 70 to the microcomputer 10 and the second valve 80 without electric noise, respectively, and a gas dryer. It is configured to include holding relays (RLY5) 180, 180 'for the safety device configuration during the initial ignition of the.

The operation of the prior art configured as described above is as follows.

First, when the user commands the dryer operation, the microcomputer 10 recognizes this and switches the start relay 20 to the 'close' state. Therefore, the igniter 30 is heated by being supplied with power, and at the same time, the first valve 80 is supplied with power through the rectifier 90 to be 'on' to supply fuel.

At this time, the igniter 30 and the overheat prevention thermostat 40 are maintained in a "closed" state. Subsequently, 20 to 30 seconds after the igniter 30 starts heating, the igniter 30 detects a salt and switches to an 'open' state, so that the igniter 30 is 'off'.

As the igniter 30 is 'off', a salt detection signal is supplied to the microcomputer 10 and the second valve 70 through the photo coupler 60, and accordingly, the second valve 70 is turned on. As it is fueled, full-fledged combustion takes place.                         

Subsequently, if the temperature rises with combustion after a predetermined time and exceeds the temperature value according to the characteristics of the overheat protection thermostat 50, the overheat protection thermostat 50 is switched to an 'open' state.

Therefore, since the power supply is cut off, the first valve 80 and the second valve 70 are 'off' and combustion is stopped. And as the combustion is stopped and the temperature decreases over time, the overheat protection thermostat 50 is switched back to the 'closed' state.

At this time, the salt detection unit 40 detects the salt to be switched to the 'open' state and then to the 'closed' state again longer than the heating time (20 ~ 30 seconds) of the igniter 30 (30) 40 seconds) is required, so that there is a time interval of about 10 seconds even after the overheat protection thermostat 50 is switched to the 'close' state, and the salt detection unit 40 maintains the 'open' state for a predetermined time.

Therefore, as the overheat protection thermostat 50 is switched to the 'closed' state, the 'N' terminal and the 'L1' terminal are connected through the rectifier 90 so that the first valve 80 is powered on and 'on'. Since the salt detection signal of the salt detection unit 40 is connected to one end of the second valve 70 through the photo coupler 60, the second valve 70 is also turned on by receiving power through the rectifying unit 18. do.

However, at this time, the igniter 30 has a ignition failure since the heating time is 20 to 30 seconds and the first valve 80 and the second valve 70 are already cooled down as described above. In this case, the first valve 80 and the second valve 70 are in a state in which gas is being discharged.                         

Therefore, gas leaks from the time when the first valve 80 and the second valve 70 are 'on' during the time when the igniter 12 starts heating again.

In the ignition method of the gas dryer according to the prior art configured as described above, referring to FIG. 2, first, when a user inputs a power-on command, the motor is driven and simultaneously the start relay and the holding relay RLY1 and RLY5 are turned on ( S11 to S12).

Then, the first valve is turned on (S13).

Subsequently, after turning on the igniter, the second valve is turned off (S14).

When the salt detection unit is opened, the second valve is turned on, and the igniter is turned off and then ignited (S15 to S16).

At this time, if the temperature detected by the temperature sensor is more than the predetermined reference temperature continues to detect the salt, if it does not meet the preset reference temperature is determined as the ignition error and ends (S17 ~ S19).

That is, the gas dryer according to the prior art injects gas during production, and inflow of air remaining in the gas pipe during operation causes the gas to be discharged immediately without the ignition due to the small amount of gas in the first ignition attempt, and the igniter and the salt gum until the second attempt. The cooling and heating of the branch took about two minutes, resulting in lower productivity and live gas leaks.

The present invention has been made to solve the above problems, and the object of the present invention is to enable a smoother ignition by forcibly removing the air remaining in the pipe before ignition during the initial operation of the gas dryer.

In order to achieve the above object, an apparatus for reducing the ignition time of a gas dryer according to the present invention includes an igniter for igniting fuel gas with one end connected to a power supply terminal (L1), and one end connected to the other end of the igniter and being normally closed. When the salt state of the igniter is detected in the 'state' and the salt detection unit is switched to the 'open' state, one end is connected to the other end of the salt detection unit, the other end is connected to the power supply terminal (N), the normal 'closed' state In the gas dryer having an overheat prevention thermostat and a first state and a second valve, which are switched to an 'open' state upon detection of overheating, one end is connected to the salt detection unit and the other end is connected to the thermostat. By sensing the on state of the relay RLY2 and the first valve at the initial stage of ignition, the on / off of the relay RLY2 is controlled to discharge the remaining air in the pipe. A microcomputer controlling the operation of the igniter, the first and second valves, a holding relay RLY5 having one end connected to the first valve and the other end being grounded, and a capacitor C1 connected with the holding relay RLY5. And a switch in which a contact is moved in association with the holding relay RLY5, and a rectifier for supplying power to the first and second valves according to the connection state of the switch.

Preferably, the microcomputer is configured to control the second valve to be turned on by turning off the relay RLY2 for a preset time when the first valve is turned on.

The method of reducing the ignition time of the gas dryer according to the present invention for achieving the above object is a gas dryer having a motor, a plurality of relays (RLY1.5, 2.5), first and second valves, an igniter and a salt detector. In the method for shortening the ignition time, when the user inputs an operation start command, the motor is driven and the first, second, and fifth relays RLY1, 2, and 5 are turned on, and when the first valve is turned on, the first valve is turned on. Controlling the on / off of the second relay RLY2 to discharge the remaining air in the pipe; and controlling the ignition when the remaining air is discharged.

Preferably, the step of discharging air remaining in the pipe may include turning off the second relay RLY2 when the first valve is turned on, and when a preset time elapses when the second relay RLY2 is turned off. The second valve is turned on and the second relay RLY2 is turned on when the predetermined time elapses.

More preferably, when the remaining air is discharged, controlling the ignition may include turning on the ignition initial second valve to discharge the air, turning on the igniter, turning off the second valve, and opening the salt detection unit. When the second valve is turned on, the igniter is turned off and then ignited, and determining whether the normal ignition is performed according to the temperature sensed after the ignition is made.

More preferably, the step of determining whether or not the normal ignition according to the detected temperature is characterized in that the step of determining that the ignition error if the detected temperature after the ignition is less than the preset temperature.

Hereinafter, an apparatus and method for shortening the ignition time of a gas type dryer according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing a device for reducing the ignition time of the gas-type dryer according to the present invention, Figure 4 is a flow chart showing a method for reducing the ignition time of the gas-type dryer according to the present invention.

As shown in FIG. 3, a device for reducing an ignition time of a gas dryer according to the present invention includes a first relay (RLY1) 110 having one end connected to a power supply terminal L1 and operating for starting at an ignition command, and One end is connected to the first relay (RLY1) 110, the igniter 120 for igniting the gas, and one end is connected to the other end of the igniter 120, the state is normally 'closed' and the salt of the igniter In the case of detecting the salt detection unit 200 is switched to the open state, one end is connected to the other end of the salt detection unit 200 and the second relay (RLY2) 240 that is on / off according to the control signal, and One end is connected to the second relay (RLY2) (240) and the other end is connected to the power supply (M), the normal thermal 'closed' state and the overheat protection thermostat (130) is switched to the 'open' state when overheating detection (130) ), The first and second valves 160 and 150, and the ignition initial first valve 1 The on / off of the second relay (RLY2) 240 is controlled so that the air remaining in the pipe is discharged by sensing the on state of the 60 and the igniter 120, the first and the second valve 160 The microcomputer 100 controlling the operation of the 150, a fifth relay RLY5 180 having one end connected to the first valve 160, and the other end grounded, and a fifth relay RLY5 ( The first and second valves according to a connection state of the capacitor C1 connected to the 180, the switch 180 'in which the contact moves in association with the fifth relay RLY5, and the switch 180'. Rectification unit 190 for supplying power to the 160, 150, the third relay (RLY3) 220 for controlling the driving of the motor 230 in accordance with the control signal of the microcomputer 100, and the temperature at ignition And a capacitor C1 connected in parallel with the fifth relay RLY5 to detect the temperature sensor 210.

The switch 180 ′ includes a first contact point at which one end is connected to the salt detection unit 200, and a second contact point at which one end is connected between the salt detection unit 200 and the thermostat 130.

Referring to the operation of the valve drive device of the gas dryer according to the present invention configured as described above are as follows.

First, when the user commands the operation of the dryer, the microcomputer 100 recognizes this and switches the third relay RLY3 220 to the closed state to drive the motor 230. As the 2, 5 relays RLY1, RLY2, RLY5, 110, 240, 180 are switched to the closed state, the igniter 120 is powered and heated at the same time. 1 valve 160 is 'on' by receiving power through the rectifier 140 to supply fuel.

Then, the first valve 160 is turned on. At this time, when the first valve 160 is turned on, the second relay RLY2 240 is turned off to forcibly discharge air before ignition.

That is, while the second relay (RLY2) 240 is turned off to a predetermined time, the second relay (RLY2) 240 is turned off and the second valve 150 is closed. As the switch is forced to open the second valve 150, the air remaining by the suction fan and the gas pressure in the pipe may be discharged to the outside.

When the preset time elapses, the igniter 120 is turned on by turning on the second relay RLY2 240, the second valve 150 is turned off, and the salt detector 200 is turned off. It detects salt and determines whether it is open.

 That is, the igniter 120 and the overheat protection thermostat 130 are maintained in a "closed" state. Subsequently, 20 to 30 seconds after the igniter 120 starts heating, the salt detection unit 200 detects the salt and switches to the open state, so that the second valve is turned on and the igniter 120 is turned on. Off '.

As the igniter 120 is 'off', the salt detection signal is supplied to the microcomputer 100 and the second valve 150 through the photo coupler 170, and accordingly the second valve 150 is turned on. As it is fueled, full-fledged combustion takes place.

Subsequently, if the temperature rises according to combustion after a predetermined time and exceeds the temperature value according to the characteristics of the thermal protection thermostat 130, the thermal protection thermostat 130 is switched to an 'open' state.

Therefore, since the power supply is cut off, the first valve 160 and the second valve 150 are 'off' and combustion is stopped. And as the combustion is stopped and the temperature decreases over time, the overheat protection thermostat 130 is switched to the 'closed' state again.

At this time, the salt detection unit 200 detects the salt to be switched to the 'open' state and then to the 'closed' state again longer than the heating time (20 ~ 30 seconds) of the igniter 120 (30) 10 seconds after the overheat protection thermostat 130 is switched to the "closed" state, there is a time interval of about 10 seconds, so the salt detecting unit 200 maintains the "open" state for a predetermined time.

Therefore, as the overheat prevention thermostat 130 is switched to the 'closed' state, it is connected through the rectifying unit 140 so that the first valve 150 is supplied with power and is 'on', and the salt detection unit 200 detects the salt. Since the signal is connected to one end of the second valve 150 through the photo coupler 170, the second valve 1500 is also 'on' by receiving power through the rectifier 140.

However, at this time, the igniter 120 has a ignition failure since the heating time is 20 to 30 seconds and the first valve 160 and the second valve 150 are cooled down before being turned on as described above. In this case, the first valve 160 and the second valve 150 are in a state in which gas is discharged.

Accordingly, when the first relay 160 is turned off when the first valve 160 is opened during the initial ignition operation, the second valve 150 is forcibly opened.

Referring to FIG. 4, a method for shortening the ignition time of the gas dryer according to the present invention configured as described above, first, it is determined whether a user inputs an ignition command (S101).

Subsequently, if the user inputs an ignition command (S101), the third relay RLY3 is turned on and the first, second, and fifth relays RLY1, RLY2, and RLY5 are simultaneously turned on (S102).

After the first valve is turned on, the second relay RLY2 is turned off (S103 to S104).

Next, it is determined whether the preset time has elapsed (S105).

If the predetermined result has not elapsed (S105), the second valve is forcibly turned on until the predetermined time has elapsed (S106).

On the other hand, the determination result (S105), when the predetermined time elapses, the second relay (RLY2) and igniter is turned on, the second valve is turned off (S107 to S108).

Next, it is determined whether the salt detection unit (frame sensor) is opened (S109).

As a result of the determination (S109), when the salt detection unit (frame sensor) is opened, the second valve is turned on and the igniter is turned off (S110).

If the temperature after ignition is ignited, the ignition failure command is output (S111 to S113).

As described above, the apparatus and method for shortening the ignition time of the gas type dryer according to the present invention can achieve smoother ignition by forcibly discharging the air remaining in the gas pipe before ignition during the initial operation of the gas type dryer.

As described above, the apparatus and method for shortening the ignition time of the gas dryer according to the present invention have the following effects.

First, in the initial operation, by removing the gas and air remaining in the gas pipe before the ignition can be made possible with only one attempt.

Second, the ignition time can be reduced by 50 ~ 80% as a single attempt is possible.

Third, since the ignition time can be shortened, the time required for production test can be reduced, thereby increasing productivity.

Claims (6)

An igniter, one end of which is connected to the power supply terminal L1 to ignite the fuel gas, and one end of which is connected to the other end of the igniter and is normally in a 'closed' state, and when the salt of the igniter is detected, the igniter is opened. The salt detection unit is switched, and one end is connected to the other end of the salt detection unit, the other end is connected to the power supply terminal (N), and the overheat prevention thermostat (thermostat) which is normally switched to the 'closed' state and the 'open' state when the overheat is detected. In a gas dryer having a first and a second valve, One end is connected to the salt detecting unit and the other end is connected to the thermostat, and the ON of the relay RLY2 is discharged so that the air remaining in the pipe is discharged by detecting the ON state of the first valve. A microcomputer controlling the operation of the igniter, the first and the second valves while controlling on / off, a holding relay RLY5 having one end connected to the first valve and the other end being grounded, and the holding relay RLY5. Condenser C1 connected to the switch, a switch in which the contact is moved in conjunction with the holding relay (RLY5), and a rectifier for supplying power to the first and second valves in accordance with the connection state of the switch A device for shortening the ignition time of a gas dryer. The method of claim 1, The microcomputer shortens the ignition time of the gas type dryer, wherein when the first valve is turned on, the second valve is turned on by turning off the relay RLY2 for a preset time. . In the method of shortening the ignition time of a gas type dryer having a motor, a plurality of relays (RLY1.5, 5), first and second valves, an igniter and a salt detector, When the user inputs an operation start command, the motor is driven and at the same time, the first, second, and fifth relays RLY1, 2, and 5 are turned on, and when the first valve is turned on, the second relay RLY2 is turned on. Controlling on / off to discharge air remaining in the pipe; And, Reducing the ignition time of the gas-type dryer comprising the step of controlling the ignition when the remaining air is discharged. The method of claim 3, wherein Discharging the air remaining in the pipe, Turning off the second relay RLY2 when the first valve is turned on; turning on the second valve until a preset time elapses when the second relay RLY2 is turned off; When the time elapses, the method of reducing the ignition time of the gas-type dryer, characterized in that the step of turning on the second relay (RLY2). The method of claim 3, wherein If the remaining air is discharged to control the ignition, Turning on the ignition initial second valve to discharge air, turning on the igniter, turning off the second valve, turning on the second valve when the salt detection unit is open, and turning off the igniter; And determining the normal ignition according to the temperature sensed after the ignition is made. The method of claim 5, The determining of the normal ignition according to the detected temperature, The method of reducing the ignition time of the gas-type dryer, characterized in that the step of determining that the ignition error if the detected temperature after the ignition is less than the predetermined temperature.

Images