KR950007060B1 - Foam-protection apparatus and washing method for drum type washer - Google Patents

Abstract

a bubble detector for detecting whether a bubble is generated in more than an established amount or not by means of the output signal from a bubble sensor; a temperature sensor and a humidity sensor for sensing the temperature and the water level of a washing water, respectively; a washing motor; a water-supply valve; an integrated element for an interface to drive a drain motor and a heater; a driving section comprising resistances and triacs; and a micom for performing a washing operation by controlling the drives of the washing motor, the water-supply valve, the drain motor and the heater and reducing the generated bubble amount.

Description

Anti-foaming device and washing method of rotating drum type washing machine

1 is a cross-sectional view showing the configuration of a general rotary drum type washing machine.

2 is a circuit diagram of the anti-foaming device of the present invention.

3 is a circuit diagram of the anti-foaming device of the present invention.

Figure 4 is a schematic view showing a state in which the foam sensor is installed in the rotating drum type washing machine by the anti-foaming device of the present invention.

5 is a signal flow diagram showing a washing method of the present invention.

* Explanation of symbols for main parts of the drawings

2: tub 4: washing motor

8: water supply valve 11: drainage motor

12: bubble sensor 13: bubble detection unit

14: temperature detection unit 15: water level detection unit

16: heater 17: drive unit

18: Micom 121: Case

122,123: sensing rod 124: insulation

125: gasket

The present invention to improve the washing efficiency of the laundry by washing the laundry while adjusting the laundry does not occur more than a certain amount when washing the laundry in the rotary drum type washing machine to prevent foam generation and washing method of the rotating drum type washing machine It is about.

In general, the rotating drum washing machine is configured as shown in FIG. Here, reference numeral 1 denotes a main body, and reference numeral 2 denotes a tub formed by the support 2A in the main body 1. A rotating drum 3 is provided in the tub 2, and a rotating shaft 3A extends outward of the tub 2 in the rotating drum 3 to form a poly 3B.

4 is a washing motor. A pulley 4B is installed on the rotation shaft 4A of the washing motor 4, and the pulley 4B is connected to the pulley 3B and the belt 5 so that the washing motor 4 is driven, thereby rotating the drum 3. Is rotated.

In addition, a detergent container 6 is installed on the upper part of the main body 1, and a water supply line 7 and a water supply valve 8 are installed to wash water and detergent into the tub 2 through the water supply port 9. A drain line 10 and a drain pump 11 are installed below the tub 2.

The rotary drum type washing machine having such a configuration ascends and descends laundry as the rotary drum 3 rotates according to the driving of the washing motor 4 while detergent and washing water are introduced into the rotary drum 3 through the water inlet 9. Washing is performed by the impact and stretching action.

In the process of performing such a washing operation, a lot of bubbles are generated by the rise and fall, but conventionally, the washing operation was continued without removing the generated bubbles. Therefore, when a lot of foam is generated and the foam is filled between the tub 2 and the rotating drum 3, the rotation of the rotating drum 3 is prevented by the pressure of the foam, and the washing motor 4 is overloaded. It is caught, the drive unit of the washing motor (4) is damaged, as well as foam flows into the detergent container (6) through the water inlet (9), the gap between the top plate (1A) and the detergent container (6) of the main body (1) Flowing and dirty the surroundings of the washing machine, this phenomenon has a problem that occurs more severely in a rotary drum type washing machine having a function to heat the wash water by the built-in heater.

The present invention has been made to solve the above-mentioned conventional problems, install a foam sensor to detect the generation of bubbles, when the first detected that the foam is generated more than a certain amount by weakly driving the washing motor foam To reduce the occurrence of bubbles and continue to produce bubbles over a certain amount of time even after the set time has elapsed, reduce the occurrence of bubbles by draining part of the wash water and refilling water twice, and draining and replenishing part of the wash water. If foam continues to be generated, turn off the heater and stop the washing motor to reduce the foam, and then perform the washing operation again to prevent damage to the washing motor and the driving unit caused by the generation of foam, and improve the washing efficiency of the laundry. It provides a foam preventing device and a washing method of the rotating drum type washing machine to enable It will be described in detail with reference to the accompanying drawings as the purpose, where the same parts as in the prior art.

FIG. 2 is a block diagram of the antifoaming device of the present invention, and FIG. 3 is a detailed view of the diode D1, which detects whether bubbles exceeding a predetermined amount are generated by the output signal of the bubble sensor 12, as shown in FIG. D2), foam detection unit 13 made of resistors R1, R2 and condenser C1, temperature sensing unit 14 and humidity sensing unit 15 for respectively sensing the temperature and level of the washing water, and washing A drive unit consisting of an interface integrated element 17A for driving the motor 14, the water supply valve 8, the drain motor 11, and the heater 16, resistors R3-R12, and triacs TR11-TR15 ( 17) and washing the laundry while controlling the driving of the washing motor (4), the water supply valve (8), the draining motor (11) and the heater (16) through the drive unit 17 and the foam detection unit The detection signal of (13) determines the amount of foaming and reduces the amount of foaming, while the microcomputer 18 performs washing operation and the AC power is rectified and constant voltage. The power supply unit 19 is composed of a power supply transformer T, a bridge diode BD, a capacitor C12, C13, and a constant voltage integrated device 19A.

In this case, the foam sensor 12 is formed by installing two sensing rods 122 and 123 in the case 21 and filling the insulating material 124 as shown in FIG. 4 and the gasket 125 at the top of the tub 2. ) And the sensing rods 122 and 123 are connected to each other by bubbles generated when bubbles are generated. In the bubble generating apparatus of the present invention configured as described above, when AC power source AC is applied, the applied AC power source AC is stepped down through the power supply transformer T of the power supply unit 19 and bridge rectification is performed at the bridge diode BD. After being smoothed by the capacitor C12, the constant voltage integrated element 19A is converted into a constant voltage and supplied to the operation power supply B + in each circuit portion.

When washing laundry in such a state, the temperature detector 14 and the water level detector 15 detect the temperature and the water level of the washing water, respectively, and input the same to the microcomputer 18, and the microcomputer 18 outputs the output terminal ( As the driving signal is output to P1 + P5, the driving unit 17 selectively drives AC power to the washing motor 4, the water supply valve 8, the draining motor 11, and the heater 16. Let's go.

That is, when the microcomputer 18 outputs the forward driving signal to the output terminal P1, the trigger signal is applied to the trigger terminal of the triac TRI through the interface integrated device 17A. Therefore, the triac TRI1 is brought into a conductive state, and the AC power source AC is applied to the washing motor 4 through the triac TRI1 so that the washing motor 4 is driven in the forward direction, and to the output terminal P2. In the case of outputting the reverse drive signal, the triac TRI2 is triggered to be in the conduction state, and the washing motor 4 is driven in the reverse direction. The feed terminal drive signal, the drain motor drive signal, and the heater are driven by the output terminals P3 + P5. As the driving signal is output, the triac TRI1 + TRI5 is triggered to be in a conductive state, thereby driving the water supply valve 8, the drain pump 11, and the heater 16.

In this manner, the driving unit 17 drives the washing motor 4, the water supply valve 8, the draining motor 11, and the heater 16 according to the driving signal output from the microcomputer 18 while washing the laundry. If bubbles are generated above the installation position of (12), the two sensing rods 122 and 123 of the foam sensor 12 are connected by the foam, so that the operating power B- is passed through the foam sensor 12, The high potential is input to the input terminal IN of the microcomputer 18 divided by the resistors R1 and R2 by the resistors R1 and R2 of the sensing unit 13.

Then, the microcomputer 18 determines that the foam is generated more than the set amount due to the high potential of the input terminal IN, the washing motor 4, the water supply valve 8, the drain pump 11 and the heater through the drive unit 17. While controlling the driving of (16), the generation of foam is reduced to wash the laundry.

5 is a signal flowchart showing the anti-foam washing method of the present invention. As shown in the figure, when performing the washing operation of the laundry, first, a sufficient time (T1) is stored in the memory (RA1) enough to have the effect of reducing the foam when washing the foaming decreases, the water level detection unit In accordance with the detection signal of (15) to control the water supply valve (8) while the water supply and the water supply device to the wash water to the set water level and determines whether the foam detection unit 13 detects the foam.

At this time, if the bubble detection unit 13 does not detect the bubble, it is determined that the bubble is less than the set amount, and performs the washing operation while driving the washing motor 4 in a normal rhythm, the detection of the temperature detection unit 14 While the heater 16 is turned on and off according to the signal, the washing water is adjusted to the set temperature, and the above operation is repeated until the raw material of the washing operation is determined and completed.

When the foam detecting unit 13 detects the foam in the state of performing the washing operation as described above, the microcomputer 18 determines that the foam is generated more than the set amount, and records the elapsed time when the foam is generated more than the set amount. Drive the washing motor (4) in a rhythm to save less bubbles, and compare the values of the memory (RA1, RA2), that is, the elapsed time that the bubble generated more than the set amount in the memory (RA1) When the stored time is smaller than the set time T1, the above operation is repeatedly performed until the washing operation is completed, and when the foam is reduced below the set amount, the washing motor 4 is driven again with the normal rhythm to perform the washing operation.

In addition, when the washing motor 4 is driven in a weak rhythm, bubbles continue to be generated for more than a predetermined amount of time (T1) or more, and when RA2-RA1≥0, the microcomputer 18 determines that the detergent concentration of the washing water is high. It is determined whether the memory RA2 has been reset twice, draining part of the washing water while driving the drain motor 11, and driving the water supply valve 8 to replenish water as much as the amount of washing water drained. After that, the memory RA2 is reset.

Here, as a part of the wash water is drained and the water is supplemented by the drained amount, the detergent concentration of the wash water is lowered, and the amount of foaming is reduced.

In this state, even if some of the wash water is drained and refilled, bubbles continue to occur, and when RA2-RA1≥0, the water (RA2) is reset after draining and replenishing a part of the wash water again. Even if a part of the wash water is drained and replenished and the memory RA2 is reset twice, bubbles continue to be generated over a set amount and RA2-RA1≥0. 16) is turned off, the washing motor 16 is stopped and the washing operation is stopped to prevent bubbles from being generated, and when the bubbles are naturally reduced to be lower than the set amount, the washing motor 4 is driven again to the normal rhythm. Resume operation.

As described above, since the present invention performs the washing operation while preventing the foam from generating more than the set amount when washing the laundry, the damage of the driving unit and the washing motor due to the excessive generation of foam is prevented and the washing efficiency is improved, as well as in the washing machine. Bubbles can be prevented from flowing out.

Claims (4)

Bubble detection unit 13 for detecting whether more than a predetermined amount of foam is generated by the output signal of the foam sensor 12, and temperature detection unit 14 and humidity detection unit for detecting the temperature and water level of the washing water, respectively And an interface integrated element 17A for driving the washing motor 14, the water supply valve 8, the draining motor 11, and the heater 16, the resistors R3-R12 and the triac TR11-TR15. The washing unit 17 performs the washing operation of the laundry while controlling the driving of the washing motor 4, the water supply valve 8, the draining motor 11, and the heater 16 through the driving unit 17 and the driving unit 17. Bubble detection unit of the rotating drum type washing machine, characterized in that consisting of a microcomputer (18) to perform the washing operation while reducing the amount of foam by determining the amount of foam generated by the detection signal of the foam detection unit (13). The method of claim 1, the foam sensor 12, by installing the two sensing rods (122, 123) in the case 121 to fill the insulating material 124 to expose only the ends of the sensing rods (122, 123), gasket 125 ) And the bubble generating device of the rotating drum type washing machine, characterized in that the sensing rods 122 and 123 are connected to each other by bubbles when the amount of bubbles is generated by setting the upper portion of the tub 2 together with bubbles. Reduction of foaming The first process of storing the time T1 at which the effect of foam reduction on the washing occurs in the memory TA1, the second process of supplying the washing water to the set water level, and the determination of whether the foam above the set amount is generated And a fourth step of repeating the process from the second process until the washing is completed after driving the washing motor to the normal rhythm and controlling the heater when the foam is less than the set amount in the third process. And a fifth process of performing washing to reduce foaming when the foam is more than a predetermined amount in the third process. According to claim 3, Reducing washing of foaming in the fifth process, the effect of the foaming can be exhibited by storing the elapsed time of the foam generated more than the set amount in the memory (RA2) and driving the washing motor in a rhythm The first step of comparing and determining the memory (RA1) value and the value of the memory (RA2) stored enough time, and when RA2-RA1≥0 in the first step by draining and replenishing part of the wash water Reducing the detergent concentration and resetting the memory (RA2) and storing the elapsed time in which the foam is greater than the set amount in the memory (RA2) again, and continues after the second process RA2-RA1≥0 In this case, even if the second process is repeated as many times as the set number of times to reduce the detergent concentration, if the step RA2-RA1≥0, all the detergent operations are stopped to reduce the foam and then perform the washing operation again. Controlled by A rotating drum-type anti-foaming washing method of a washing machine.