KR0129222B1 - Racing prevention apparatus of drainage pump in a washing machine - Google Patents

Abstract

The drainage pump(20) is driven, the water in the wash tub(2) is drained from the drainage hose(21). The remaining water(34) is almost depleted, as it loses the floating force, the water level ball(23) subsides, the photosensor senses the water level, the controller(22), by the change of the sensing signal, feeding power to the drainage valve(25), closing the valve(25) and by stopping the centrifugal pump(20), the wasteful operation is prevented. In the drainage or drying operation, when the remaining water is collected in the remaining water basin(34) and bellows(16) the drainage valve(25) is opened and water is drained.

Description

Drainage pump idling prevention device of washing machine and method

1 is a cross-sectional view of a conventional washing machine.

2 is a cross-sectional view of a washing machine according to an embodiment of the present invention.

3 is a partial detail of FIG.

4 is a cross-sectional view taken along the line I-I of FIG.

5 is a cross-sectional view of a washing machine according to another embodiment of the present invention.

6 is a partial detail of FIG.

7 is a flowchart of operation of the present invention.

* Explanation of symbols for main parts of the drawings

1: cabinet 2: nuts

3: drum 16: drain bellows

20: centrifugal drainage pump 21: drain hose

22 controller 23 water level ball

24: optical sensor 25: drain valve

26: first euro 27: second euro

28: float 29: water pipe

30: upper sensing unit 31: lower sensing unit

32: stopper 34: residual part

35: atmospheric pressure hole

The present invention relates to a washing machine, and more particularly, to a drain pump idling prevention device and method of the washing machine to prevent the idling of the pump during drainage to prevent noise generated during idling and to reduce the power consumption.

In the conventional washing machine, as shown in FIG. 1, a tub 2 for holding wash water is fixed inside the cabinet 1, and a plurality of holes are formed in the tub 2 so that the wash water passes freely. In addition, a drum (3) carrying laundry therein is rotatably installed, and a detergent container (4) is fixed to an upper side of the drum (3), and a water supply valve (5) for water supply on the upper part of the detergent container (4). Is installed, the detergent container (4) and the tub (2) is connected by the water supply bellows (6).

The drum 2 is rotated by the power of the drive motor 7.

In addition, the upper part of the tub (2) is formed with a blower opening (9) for entering the hot air during drying, and the blower tube (8) is connected to the blower (9), the giant heater (10) is coupled to one side of the blower tube (8), A blowing fan 13 is installed at a connection portion between the blower tube 8 and the condensation tube 11, and the condensation tube 11 is connected to the lower exhaust port 12 of the tub 2 to form a circulation passage. And the middle part of the condensation pipe 11 is coupled to the cooling water pipe 14 for supplying the cooling water for condensation into the condensation unit 11 at the time of drying.

In addition, the drain bellows 16 is connected to the lower end of the tub 2, the air tank 17 is connected to the drain bellows 16, and the air hose 18 is connected to the air tank 17, the air The water level sensor 19 is connected to the upper end of the hose 18. The centrifugal drainage pump 20 is connected to an end portion of the drainage bellows 16 and a connection portion of the drainage hose 21 for discharging water to the outside. The water level sensor 19 is a pressure sensor that converts air pressure into an electrical signal.

And the upper part of the cabinet 1 is coupled to the controller 22 for adjusting the drive of the washing machine.

In the drawings, reference numeral 33 denotes a laundry, and 35 denotes an atmospheric pressure hole.

The conventional washing machine as described above is supplied with water or water and sete through the water supply valve 5 and the detergent container 4 into the tub 2 for washing or rinsing. The air in the air tank 17 is compressed by water or water and detergent, so that the compressed air in the air tank 17 is transmitted to the level sensor 19 coupled to the upper end through the air hose 18, The water level sensor 19 converts the air pressure into an electrical signal and transmits it to the controller 22.

When the water level in the tub 2 reaches the set value as the water supply proceeds, the controller 22 opens the water supply valve 5 according to the electric signal of the water level sensor 19 due to the pressure in the air tank 17 according to the water level. It closes to stop the water supply and wash or rinse.

The process of draining and dehydrating after washing or rinsing is finished as the controller 22 stops washing or rinsing and drives the centrifugal drainage pump 20 (including water removed from washing 33 by dehydration). Is introduced into the centrifugal drainage pump 20 through the drain bellows 16 in the tub 2 and out through the drain hose 21.

At this time, since the tub 2 and the drain bellows 16 are always connected to each other, when the drainage is completed, the tub 2 and the drain bellows 16, the air tank 17, and the drain pump ( 20) and the inside of the drain hose 21 is completely emptied, and in this state, the detergent supplied with the water at the time of water supply during the next washing process is completely emptied before the tub 2 is filled with the drain bellows 16. And the air tank 17 and the drain pump 20 are filled first, and in this state, even if the water supply is stopped and the washing process proceeds, the water in the drain bellows 16 and the air tank 17 and the drain pump 20 are thus. Detergent filled with is hardly affected by the washing water flow, so it does not dissolve, so that a large amount of the total amount of detergent supplied does not wash, so even if a desired amount of detergent is supplied according to the amount of washing, Not only does it become unbreakable, but there is a problem that the undissolved detergent in the draining bellows 16, the air tank 17, and the drainage pump 20 is discharged out as it is and is polluted in the drainage process after the washing process is completed. .

In order to solve this problem, by connecting a siphon brake (35) between the upper end of the drain hose 21 and the detergent container (4), the water drained by the action of the siphon brake 35 in the drainage process is completely Residual water remains in the drain hose 21 as indicated by the point in FIG. 1 in the drain hose 21, and when the centrifugal drain pump 20 is stopped, the residual water flows back into the drain bellows 16 to be filled. During the washing process, the detergent supplied with the water is filled in the tub 2 instead of being filled in the drain bellows 16.

At the time of drying, the air heated by the drying heater 10 is blown into the tub 2 by the blowing fan 13 while rotating the drum 3 containing the laundry 33 having been dehydrated, and the hot air is discharged. Water is removed from the laundry 33 inside the drum 3 and flows into the condensation pipe 11 through the exhaust port 12. The cooling water pipe 14 is used to remove water from the hot and humid air. A small amount of water is supplied to the inside of the condensation tube 11, and thus, the air from which moisture is removed is introduced into the blower tube 8 by the blower fan 13. At this time, the small amount of cooling water supplied to the condensation pipe 11 and the water removed from the air of high temperature and high humidity are discharged out through the drain hose 21 by the centrifugal drain pump 20 through the drain bellows 16.

Since there is a lot of water to be drained during washing and rinsing, the centrifugal drain pump 20 is continuously driven for several minutes or more, and during dehydration, the centrifugal drain pump 20 is intermittently driven until the end of dehydration to drain.

In the conventional washing machine as described above, water is almost drained when drained after washing or rinsing or drying, and when air flows into the centrifugal drainage pump 20, the clock impinges the water and the impeller inside the centrifugal drainage pump 20. The impact sound of the wah is severely generated, and this noise is the loudest noise except when the normal speed is reached at the time of dehydration, and it is unpleasant to the user, especially during the drying process over 60 to 120 minutes.

And as the conventional water level sensor 19 is detected by the pressure generated while the air in the air tank 17 is compressed in accordance with the wash water level, water below a certain level is not detected, the centrifugal drainage pump 20 when draining It was to control the operation of time based on time, so it could not prevent the generation of noise.

The present invention was devised to solve the conventional defects as described above, to prevent the idle pump is prevented during drainage to prevent noise generated during idle, and to prevent idle pump drain pump idle to reduce power consumption The purpose is to provide a device

In order to achieve the object of the present invention, a washing machine having a drainage bellows and a drainage system consisting of a drainage hose and a drainage hose and a drainage pump installed between the drainage and the drainage hose, respectively, in the middle and bottom portions of the drainage bellows, respectively. First and second flow paths, one end of which is connected and the other end of which is connected together to the remaining portion, water level sensing means for detecting a water level in a portion of the first flow path connected to an intermediate portion of the drainage barrel; A drain valve installed at a lower side of the hose to open and close the lower end of the drain hose, and a controller for controlling the driving of the drain valve and the centrifugal drain pump according to the detection signal of the water level detecting means. Pump idle prevention device, and installed between the drain bellows and the remaining portion and the drain hose and the residual portion and the drain hose In the washing machine having a drainage system consisting of a water pump, the lower end of the drain bellows is directly connected to the residual portion to form a flow path to the residual portion, one side is connected to a position higher than the residual portion of the drain bellows and the other side A water level pipe connected to the remaining water part to form another flow path, water level sensing means installed at the water level pipe to detect a change in the water level, a drain valve installed at the bottom of the drain hose to block water flow; A drain pump idling prevention device for a washing machine, characterized in that it comprises a controller for controlling the drain valve and the drain pump according to the signal of the water level detecting means, the first step of washing, rinsing, dehydration and drying operation The second step of driving the centrifugal drainage pump, opening the drainage hose by turning on the drainage valve, and When the voltage cut-off of the water level sensing means installed at the inlet side of the first flow path is an odd number, the water level in the drain bellows is judged to be low to stop driving of the drainage pump and turn off the drainage valve to shut off the drainage hose. If the step is not the end of operation, it is determined whether the voltage cutoff of the water level detecting means has occurred evenly, and if it is even, it is determined that the water level in the drainage bellows is high, driving the drainage pump and turning on the drainage valve to start drainage. A fourth step of repeating the third step and a fifth step of ending the drainage when the operation is completed after the third step is provided with a drain pump idle prevention method of the washing machine.

Hereinafter, the drainage pump idle prevention device of the washing machine according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings.

2 is a cross-sectional view of a washing machine showing an embodiment of the present invention, FIG. 3 is a partial detail view, and FIG. 4 is a cross-sectional view taken along line I-I of FIG. 3, and as shown therein, the drainage bellows 16 of the washing machine. Connect one end of the first flow path 26 and the second flow path 27 to the middle portion and the lower end of the), the other end is joined to the remaining portion 34, the water level detection means to the drain bellows (16) Coupling and coupling the centrifugal drain pump 20 between the remaining portion 34 and the drain hose 21, install a drain valve 25 on the lower side of the drain hose 21, the water level detection According to the detection signal of the means, the controller 22 which controls the drive of the drain valve 25 and the centrifugal drain pump 20 is provided.

The water level detecting means includes a water level ball 23 inserted into the drain bellows 16, and a light emitting part 24-1 and a light receiving part installed at both sides of an intermediate part of the drain bellows 16. It consists of an optical sensor having a 24-2.

The diameter of the first flow path 26 is larger than the diameter of the second flow path 27.

7 is an operation flowchart of the present invention, the first step of washing, the second step of driving the centrifugal drain pump during rinsing, dehydration and drying operation, the drain valve is turned on to open the drain hose, When the voltage cut-off of the water level sensing means provided at the inlet side of the first flow path in the bellows is an odd number, the water level inside the drainage bellows is judged to be low to stop the driving of the drainage pump and turn off the drainage valve to shut off the drainage hose. In step 3, if the operation is not completed, it is determined whether the voltage cutoff of the water level detecting means has occurred evenly, and if it is even, it is determined that the water level in the drainage bellows is high. And a fourth step of repeating the third step, and a fifth step of finishing drainage if the operation is terminated after the third step.

Here, the number of times the voltage cut-off of the level detecting means refers to the number of times the voltage cut-off from the beginning since the power level is repeatedly turned on and off according to the level of water since the initial washing machine starts to operate.

Hereinafter, the effect of the embodiment of the present invention as described above will be described.

First, when the centrifugal drain pump 20 is driven, water in the tub 2 is drained by the centrifugal drain pump 20 via the first flow passage 26 and the second flow passage 27 through the drain bellows 16. At this time, the water level ball 23 descends from the inside of the drainage bellows 16 as the water level is lowered, and as the flow rate of the first flow path 26 increases, the light level of the light sensor ( It stands in a position to block the light between 24-1) and the light receiving portion 24-2.

Since the water in the remaining portion 34 almost disappears, the water level ball 23 is dropped as the force to lift the water level ball 23 is lowered, and the light of the light emitting portion 24-1 of the optical sensor passes. The light sensor detects the water level by being received by the light receiving unit 24-2, and by the change of the detection signal, the controller 22 closes the drain valve 25 by applying power to the drain valve 25. The centrifugal drain pump 20 is stopped to prevent idling.

Subsequently, when water starts to fill in the remaining water portion 34 and the drain bellows 16 by the cooling water supplied during dehydration or drying, the water level ball 23 rises again, and the light emitting portion 24-1 of the optical sensor The light passing through the light receiving part 24-2 is blocked, and the controller 22 drives the centrifugal drain pump 20 again and shuts off the power supply of the drain valve 25 by the change of the signal. Open and drain.

At this time, the water level ball 23 blocks the light of the optical sensor and falls to the lower side when the residual portion 34 is empty again, the controller 22 closes the drain valve 25 accordingly, the centrifugal drain pump 20 Stops driving.

And, by repeating this process during dehydration and drying it is possible to prevent the idling of the centrifugal drain pump 20. In addition, when all programs are finished, the drain valve 25 is automatically opened and water in the drain hose 21 flows back into the drain bellows 16 to prepare for the next washing.

5 is a cross-sectional view of a washing machine according to another embodiment of the present invention, and FIG. 6 is a partial detailed view of FIG. 5, as shown in FIG. 5, in which the middle portion and the remaining water portion 34 are disposed in the drainage bellows 16 of the washing machine. The water level pipe 29 is connected therebetween, and the centrifugal drain pump 20 is installed between the residual water portion 34 and the drain hose 21, and the drain valve 25 is provided at the lower side of the drain hose 11. And a controller 22 for controlling the driving of the drain valve 25 and the centrifugal drain pump 20 according to the detection signal of the water level detecting means.

The water level sensing means may be configured by combining a float 28, a magnet embedded in the water level pipe 29, an upper sensing unit 30, and a lower sensing unit 31. The upper and lower sensing units 30 and 31 are formed of coils through which an induced current flows by a magnet embedded in the float 28. The upper and lower sensing units 30 and 31 may use magnet switches that are turned on and off by magnetic force.

And the stopper 32 is formed at the lower end of the water pipe 29 so as to be a lower line of the movement of the float 28.

Hereinafter, the operation and effect of another embodiment of the present invention will be described.

In this embodiment, the float 28 installed in the water level pipe 29 connected between the middle portion of the drainage bellows 16 and the remaining water portion 34 is raised and lowered according to the water level. Induction current is generated in the upper and lower sensing units 30 and 31 by the action of the embedded magnet and the upper and lower sensing units 30 and 31, and the controller 22 causes the centrifugal drain pump ( 20) and the drain valve 25, and the other components are the same as in the above-described embodiment, the same reference numerals are given to the same parts, and detailed description thereof will be omitted.

As described above, according to the present invention, when the water is drained, the driving of the centrifugal drain pump is stopped, and when the water is filled to some extent, the centrifugal drain pump is driven again to prevent unnecessary idling of the centrifugal drain pump, thereby preventing noise. You can wash and reduce power consumption.

Claims (6)

A washing machine having a drainage bellows and a drainage part and a drainage hose and a drainage pump installed between the drainage part and the drainage hose, each of which has one end connected to an intermediate part and a lower end thereof, and the other end being connected to the drainage bellows. First and second flow paths connected together with the remaining water portion, water level sensing means for detecting the water level in the first flow path portion connected to the middle portion of the drain bellows; And a drain valve for opening and closing a lower end, and a controller for controlling the driving of the drain valve and the centrifugal drain pump according to the detection signal of the water level detecting means. The drain of the washing machine according to claim 1, wherein the water level detecting means comprises a water level ball inserted into the drain bellows and an optical sensor corresponding to a light emitting part and a light receiving part corresponding to an intermediate portion of the drain bellows. Pump idle prevention device. The apparatus of claim 2, wherein the diameter of the first flow path is larger than that of the second flow path. A washing machine having a drainage bellows and a drainage part, and a drainage system consisting of a drainage hose and a drainage pump installed between the drainage part and the drainage hose, the lower end of the drainage bellows is directly connected to the residual part to form a flow path to the residual part. And a water level pipe having one side connected to a position higher than the remaining water portion of the drain bellows and the other side connected to the water remaining portion to form another flow path, and a water level sensor installed at the water level pipe to detect a change in the water level. Means, a drain valve installed at a lower end of the drain hose to block the flow of water, and a controller for controlling the drain valve and the drain pump according to a signal of the water level detecting means. Prevention device. According to claim 4, wherein the water level detection means is floated in the water level pipe and a magnet embedded therein, and the upper and lower coils around the water level pipe, the upper and lower sensing unit is characterized in that the Drainage pump idle prevention device of washing machine. A first step of washing, a second step of driving a centrifugal drainage pump during rinsing, dehydration and drying operation, opening the drainage hose by opening the drainage valve, and a first flow path inlet of the drainage bellows. A third step of stopping the driving of the drainage pump and turning off the drainage valve to shut off the drainage hose when it is determined that the water level in the drainage bellows is low when the voltage cutoff of the water level sensing means is an odd number; A fourth step of repeating the third step while driving the drainage pump and starting the drainage by turning on the drainage valve when it is determined that the voltage cutoff of the sensing means has occurred evenly. And a fifth step of finishing drainage if the operation is terminated after the third step. How to prevent ago.