KR19980031169A - How to prevent heater overcurrent in dry washing machine - Google Patents

Abstract

The present invention is to drive the heater while preventing the initial transient current caused by the characteristics of the heater by driving the heater for a predetermined time after the completion of a series of washing, washing, rinsing, dehydration in the drying washing machine in the dry washing machine The present invention relates to a method for preventing a heater transient current of a dry washing machine.

The present invention is a drying washing machine that performs a drying stroke after the completion of a series of washing, washing, rinsing, dehydrating stroke, and a heater for heating and drying the laundry during the drying stroke after completing the series of washing, rinsing, and dehydrating stroke. By allowing the drying operation of the heater by gradually increasing the drying temperature for a predetermined time, the drying is performed while preventing the occurrence of the transient current of the heater at the initial stage of the drying stroke, thereby preventing the shortening of the lifetime of the heater due to the transient current. In addition, it is to provide an effect that can be dried while preventing damage or adverse effects on the drying circuit.

Description

How to prevent heater overcurrent in dry washing machine

The present invention relates to a method for preventing a heater transient current of a dry washing machine, and in particular, a heater driven during a drying stroke after a series of washing, rinsing, and dehydrating strokes, which is a series of washing strokes in a dry washing machine, is divided and driven for a predetermined time in consideration of characteristics of the heater. The present invention relates to a method for preventing a heater transient current of a dry washing machine to allow drying while preventing an initial transient current caused.

In general, the drying washing machine performs a drying stroke when washing, rinsing, and dehydrating strokes of a series of washing strokes are completed. At this time, the heater is driven during the drying stroke, and the blower fan drives the heat generated from the heater. When the dehydrated laundry is dried by blowing in the dehydrated laundry, the heater is divided into two when the dehydrated laundry is dried while blowing the heat of the heater to drive the two heaters together during drying. In addition, the heater is designed to dry while driving the blower fan. The heater has a constant temperature characteristic in which the heat generating power of the blower fan, that is, the blower power is high, and the heat generating power of the heater is low. Initially, the two heaters are driven together when the blower fan is driven as shown in FIG. The heater is heated by the momentary transient current flowing by the momentary transient voltage.

Therefore, the instantaneous transient current of the heater generated at the beginning of the drying stroke not only shortens the life of the heater, but also has a problem of damaging or adversely affecting the drying circuit due to the instantaneous transient current.

An object of the present invention is to dry by heating while preventing the transient transient current flows to the heater at the beginning of the drying stroke after the completion of the dehydration stroke in the dry washing machine.

In order to realize the above object, the present invention provides a drying fan after a series of washing cycles in a washing machine, washing, rinsing, and dehydrating strokes, driving a blower fan at a predetermined time interval and driving the heater at predetermined time intervals. It is characterized by being made to dry at a predetermined drying temperature while gradually rising.

1 is a waveform diagram showing the relationship between the heater current and the blower fan voltage of a conventional dry washing machine

2 is a schematic control block diagram of a dry washing machine

Figure 3 is a flow chart for the heater transient current prevention method of the present invention

Figure 4 is a waveform diagram of the heater operation of the present invention washing machine

Explanation of symbols on the main parts of the drawings

A; Operation signal input section; Micom

All ; Sudden drainage drive; Water level detector

E; Motor drive bar; Quantity detector

Four; Heater driving part; Temperature sensor

Now; Blowing fan drive part

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic control block diagram of a washing machine, the operation signal input unit (A) for inputting the operation signal for the washing, rinsing, dehydration, and the drying operation of a series of washing operations, and the operation signal input unit (A) A microcomputer (b) for controlling a series of washing strokes while controlling operation signals for a series of washing strokes by a predetermined program and outputting the controlled signals to each drive unit; and a control signal of the microcomputer (b). Water supply and drainage driving unit for supplying the wash water to the washing tank and draining the wash water by the water (D), and a water level detection unit for detecting the water level of the water supplied and drained in the water supply and drainage (C) and In accordance with the control signal of the microcomputer (b) while rotating the pulsator and the washing tank while the washing, rinsing, dehydration administration motor drive unit (e) and the control signal of the microcomputer (b) to determine the washing level In order to detect the amount of laundry in order to detect the amount of laundry (bar), the heater driver (sa) for driving the heater in accordance with the control signal of the microcomputer (b), and the temperature sensing unit (h) during the driving of the heater driver (sa) And a blower fan driving unit for sucking and blowing outside air according to the control signal of the microcomputer (b).

Figure 3 is a flow chart for the heater transient current prevention method of the present invention, a series of washing administration execution step 20 for performing a series of washing administration washing, rinsing, dehydration, and the series of washing administration execution step 20 In the series of washing administration completion determination step 21 to determine whether the series of washing administration being performed in the step and the series of washing administration completion determination step 21, the drying administration is selected. If the drying stroke is not selected in the drying stroke selection decision step 22 for determining whether or not the drying stroke is selected in the drying stroke selection decision step 22, a series of washing strokes are completed, and if the drying stroke is selected, the blower fan is driven. In addition, a first heater driving step 23 for driving the first heater for a predetermined time and a first heater driving completion for determining whether a predetermined heater driving time is completed in the first heater driving step 23 are completed. The first and second heater driving steps 25 for driving the first and second heaters when the first heater driving time is completed in the step 24 and the first heater driving completion determination step 24; A drying temperature judging step 26 for determining whether a drying temperature by heater heat reaches a predetermined drying temperature while driving the heater in the first and second heater driving steps 25 and the drying temperature judging step 26 If the drying temperature does not reach the predetermined drying temperature, the first and second heaters are continuously driven until the predetermined drying temperature is reached, and if the predetermined drying temperature is reached, the first and second heaters are reached. The drying time is completed in a state in which the driving of the first and second heaters is stopped in the first and second heater driving stop steps 27 and the first and second heater driving stop steps 27 are stopped. The first and second heaters until the drying time is completed. Is a hayeoseo to consist of a drying time is determined complete drying and copper (28).

Figure 4 is a waveform diagram of the heater operation of the present invention in a dry washing machine, which shows a current state in the heater according to the divided drive of the heater.

Referring to the operation of the present invention made as described above are as follows.

First, while the power is supplied to the washing machine, the laundry to be washed is put in the washing tank, and through the operation signal input unit (A), the operation signal for the washing, rinsing, dehydration, and drying administration of a series of washing operations is Micom (B). When input to, the microcomputer (b) controls the water supply and drainage driver (c) by a predetermined program and supplies water to a predetermined level, and then controls the motor driver (e) to forward and reverse the pulsator. In addition, by controlling the amount detection unit (bar) to detect the washing amount, and determines the water supply according to the detected amount.

When the water supply level is determined, the microcomputer (b) supplies water by controlling the water supply and drainage drive (c), and supplies water to the water level determined through the water level detection unit (d), and when the water supply is completed, the microcomputer (b) In the series of washing administration step 20 to perform the washing administration, after the completion of the washing administration performs a rinsing stroke, after the completion of the rinsing administration to perform a dehydration stroke, and then a series of washing administration completion step (21) Go to the) to determine whether a series of washing administration is completed, if a series of washing administration is not completed, a series of washing administration will be performed, if the washing administration is complete, the microcom (b) select the drying administration Going to the determination step 22, it is determined whether or not a drying stroke is selected from the driving signal input unit a. At this time, if the drying stroke is not selected, the microcomputer (b) If the drying stroke is selected, the microcomputer (b) goes to the first heater driving step 23 and controls the blower fan driver to drive the blower fan at a predetermined speed. In addition, by controlling the heater driving unit (G) to drive the first heater, and then go to the first heater driving completion determination step 24 to determine whether the first heater driving is completed for a predetermined time, wherein If the driving of the first heater is not completed for a predetermined time, it is driven until the driving time of the first heater is completed. If the driving time of the first heater is completed, the microcomputer (b) increases the drying temperature. Go to the first and second heater driving step 25 to control the heater driving unit (4) to drive the drying while driving the first heater and the second heater as shown in FIG.

During the drying process by driving the heater as described above, the microcomputer (b) goes to the drying temperature judging step 26 to control the temperature sensing unit (h) so that drying can be performed while maintaining a predetermined drying temperature. It is determined whether the drying temperature has reached a predetermined drying temperature. If the drying temperature does not reach the predetermined drying temperature, the microcomputer (b) when the predetermined drying temperature reaches Drying while controlling and controlling the blower fan drive unit and the heater drive unit until the drying temperature reaches a predetermined drying temperature as a result of the determination, thus preventing damage to the laundry due to overheating and overheating of the heater. To this end, the microcomputer (b) goes to the first and second heater driving stop step 27 so that the drying temperature is no longer increased. For example, by stopping the driving of the first heater and the second heater, while controlling the blower fan drive unit, the blower fan continues to be driven while the drying temperature does not reach a predetermined predetermined drying. Then, go to the drying time completion determination step 28 to determine whether the drying time is complete, and if the drying time is not complete at this time, the microcomputer (b) go to the drying temperature determination step 26 and the current drying It is determined whether the temperature has reached a predetermined drying temperature, and if the drying temperature does not reach the predetermined drying temperature, the heater driving unit (G) is controlled to dry while driving the first heater and the second heater. Drying is performed until the drying time is completed while maintaining the temperature at a predetermined drying temperature.

As described above, the present invention is divided by a predetermined time interval to be driven at the beginning of the drying stroke after the completion of a series of washing, washing, rinsing, dehydration stroke to drive while gradually increasing the drying temperature of the heater, By preventing the initial transient current from flowing to the heater, not only can the shortening of the life of the heater due to the transient current of the heater at the beginning of drying, but also drying can be prevented from damaging or damaging the drying circuit. Will provide an effect.

Claims (1)

In the drying washing machine that performs the drying stroke after the completion of the washing, rinsing, and dehydrating strokes, which is a series of washing strokes, the fan is driven during the drying stroke after the washing, rinsing, and dehydrating strokes of the series of washing strokes. 15. A method of preventing a heater transient current in a dry washing machine according to claim 15, wherein the heater is driven until the drying temperature of the heater gradually increases to reach a predetermined temperature.