JP2010240292A - Drum washing machine - Google Patents

Abstract

An object of the present invention is to prevent the amount of circulating water from decreasing due to clogging of a foreign matter trapping filter during a washing water circulation process, thereby preventing the cleaning and rinsing performance from deteriorating.
A circulation pump 107 and a pump motor 109 for returning washing water in a water receiving tank 23 from the bottom of the water tank to above the rotating drum 21, and a foreign matter trapping filter 103 configured between the water receiving tank 23 and the circulation pump 107 And a control device 40 having a current detection means 12 for detecting the current of the pump motor 109. The control device 40 controls the washing water circulation stroke time T1, and after the pump motor 109 of the circulation pump 107 is operated, the pump motor Since 109 is controlled to rotate in the reverse direction, it is possible to prevent the foreign matter trapping filter from becoming clogged and deteriorating the washing / rinsing performance.
[Selection] Figure 1

Description

  The present invention relates to a drum-type washing machine that includes a circulation pump that sucks up washing water in a water receiving tank and returns it to a rotating drum, and automatically performs washing, rinsing, and dehydration processes.

  Conventionally, in this type of drum type washing machine, in order to improve the washing performance and the rinsing performance, a proposal has been made to discharge the washing water in the water receiving tank into the rotating drum with a circulation pump (see, for example, Patent Document 1).

  FIG. 5 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1, and the configuration will be described with reference to FIG.

  A water receiving tub 23 in which a rotating drum 21 having a large number of drain holes 22 formed on the outer periphery thereof is rotatably disposed therein is fixedly provided with a motor 26 for driving the rotating drum 21 on the outer bottom. In addition, the suspension body is supported by a spring body 33 so as to be swingable and anti-vibrated from an outer box 32 which is a washing machine body. The laundry is lifted by the rotational force of the rotary drum 21, falls from an appropriate height, and is washed by the impact force.

  The control device 40 is disposed on the upper front surface of the outer box 32, and includes control means and input means, notification and display means, etc. for controlling the operation of the motor 26 and the like to sequentially control a series of processes such as washing, rinsing and dehydration. Yes.

  As a feature of the drum type washing machine having such a configuration, there is an advantage that the amount of washing water can be reduced. On the other hand, the washing method based on the falling weight of the laundry is caused by insufficient stirring power. Since there is a problem that it takes a long time to secure a certain cleaning power and rinsing power, the conventional example corresponds to the following configuration.

  That is, in FIG. 5, a circulation pump 37 for sucking washing water from an opening provided at the bottom of the water receiving tub 23, a circulation hose 38 connected to the discharge side of the circulation pump 37, and one end side of the circulation hose 38 are The washing water is returned to the rotating drum by the circulation path constituted by the discharge port 39 that is connected and faces the rotating drum 21, so that the laundry is shocked with water or the washing water is sufficiently supplied to A configuration is adopted in which the drop impact force is increased to improve the cleaning power and the rinsing effect.

JP-A-9-215893

  However, the conventional configuration has a problem that the circulating pump is clogged with foreign matter such as lint in washing water and buttons of clothes, and the amount of circulating water cannot be secured, and the function cannot be exhibited.

  The present invention solves the above-described conventional problems, and provides a drum type washing machine that constitutes a foreign matter catching filter that catches foreign matter flowing into a circulation pump and prevents a reduction in circulation ability of the foreign matter catching filter. For the purpose.

  In order to achieve the above-mentioned object, the drum type washing machine of the present invention has a large number of outer casings of the washing machine, a water receiving tub configured inside the outer casing, and an outer periphery rotatably disposed in the water receiving tub. A rotary drum having a small hole for draining water, a circulation pump having a pump motor for returning the washing water in the water receiving tank from the bottom of the water tank to the upper side of the rotating drum, the water receiving tank and the circulation pump. A foreign matter catching filter constructed in between, a filter knob for operating the filter body of the foreign matter catching filter from the outside of the outer box, and a control device comprising current detecting means for detecting the current of the pump motor. The control device executes a washing water circulation step for returning the washing water in the water receiving tub from the bottom of the water tank to the upper side of the rotating drum by the circulation pump by driving the pump motor to rotate forward for a first time. After said first predetermined time, after the step of reversely rotating the pump motor was run a second time, is obtained by controlling to terminate the stroke of the reverse rotation.

  As a result, when the current value of the pump motor exceeds the predetermined value and the washing water capacity decreases due to the circulating pump's current value, washing and rinsing performance by removing the foreign matter adhering to the foreign matter catching filter by rotating the pump motor reversely Can be prevented.

  The drum type washing machine of the present invention can improve the cleaning effect and the rinsing effect by the circulating water flow, and can maintain the performance.

The longitudinal cross-sectional view of the drum type washing machine in Embodiment 1 of this invention Control circuit diagram of the washing machine Control flow chart of the washing machine Control flowchart of drum-type washing machine in Embodiment 2 of the present invention A longitudinal sectional view showing the structure of a conventional washing machine

  The first invention is an outer box of a washing machine, a water receiving tub configured inside the outer box, and a rotating drum having a plurality of drain holes formed on the outer periphery rotatably arranged in the water receiving tub. A circulation pump that has a pump motor and returns washing water in the water receiving tank from the bottom of the water tank to the upper side of the rotating drum, a foreign matter catching filter configured between the water receiving tank and the circulation pump, and the foreign matter A filter knob for operating the mounting of the filter body of the capture filter from the outside of the outer box, and a control device configured with current detection means for detecting the current of the pump motor. A washing water circulation process for returning the washing water in the water receiving tank from the bottom of the water tank to the upper part of the rotating drum by the circulation pump by rotating is performed for a first time, and after the first predetermined time has elapsed, the pump After performing the reverse rotation process for the second time, and controlling the end of the reverse rotation process, the lint or foreign matter adhering to the foreign matter catching filter is removed, and the foreign matter catching filter is clogged. Thus, it is possible to prevent the washing / rinsing performance from deteriorating.

  In the second invention, in particular, in the control device of the first invention, has the first time elapsed when the current value during the forward rotation operation of the pump motor of the circulation pump is less than the first predetermined value? Regardless of whether or not the pump motor is rotated in the reverse direction, foreign matter can be efficiently removed, and failure due to waste thread or foreign matter flowing into the circulation pump can be prevented.

  According to a third aspect of the invention, in particular, the control device of the first or second aspect of the invention is such that the second time elapses when the current value during the reverse rotation operation of the pump motor of the circulation pump exceeds the second predetermined value. Regardless of whether or not the pump motor is reversely rotated, the foreign matter catching filter is detected to remove foreign matter and the foreign matter is efficiently removed, and the circulation pump is made up of lint or foreign matter. It is possible to prevent a failure due to inflow.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments. Further, the same function and the same configuration as those of the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1)
1 is a longitudinal sectional view of a drum type washing machine according to a first embodiment of the present invention, FIG. 2 is a control circuit diagram of the washing machine, and FIG. 3 is a control flowchart of the washing machine.

  In the longitudinal cross-sectional view of FIG. 1, a water receiving tub 23 in which a rotating drum 21 having a water draining small hole 22 is rotatably provided is swung by a suspension 33 or the like inside an outer box 32 of a washing machine. Arranged freely, and above the outer box 32, a control device 40 including operation control of the washing machine, input means, and notification means is arranged.

  The washing water inside the water receiving tank 23 flows from the drain tube 101 at the bottom of the water receiving tank 23 into the foreign matter capturing filter 103 via the connection hose 102.

  The water from which the lint and foreign matter are captured and removed by the filter body 104 inside the foreign matter catching filter 103 flows from the filter drain tube 105 into the circulation pump 107 through the filter hose 106. The circulation pump 107 is composed of an impeller 108 and a pump motor 109, and water flowing in from the filter hose 106 side is stirred by the impeller 108 and discharged from the upper discharge cylinder 110.

  The water discharged from the discharge cylinder 110 can be switched by a switching valve 112 to a drain hose 113 for discharging to the outside of the machine and a circulating water discharge hose 114 connected to the discharge port 39.

  At the time of washing, the switching valve 112 is switched to the circulating water discharge hose 114 side and discharged from the discharge port 39 to the clothes inside the rotary drum 21 to constitute a washing water circulation process for improving the washing performance. Further, in the drainage process, the switching valve 112 switches to the drainage hose 113 side and drains the washing water in the water tank 23 outside the machine.

  The filter body 104 inside the foreign matter catching filter 103 is made up of a net, a brush or the like so that the foreign matter can be easily attached, and interlocked with a filter knob 111 that can be operated from the outer surface of the outer box 32. Thus, the outer box 32 can be taken out of the machine and cleaned to remove lint and foreign matter.

  In other words, when lint or the like flows into the circulation pump 107, the impeller 108 is wound around, and in order to prevent the pump function from being deteriorated or the impeller from being damaged, the front piping of the circulation pump 107 is prevented. A foreign matter trapping filter 103 is arranged in the structure.

  On the other hand, if a large amount of lint etc. is captured and engaged with the filter body 104, it becomes a resistance to the flow of water, the amount of water passing through the foreign matter capturing filter 103 decreases, the amount of circulating water decreases, and the drainage time increases. Therefore, the foreign matter is removed from the internal filter body 104 by operating the filter knob 111 by an operation from the front of the outer box 32.

  In addition, if the washing water circulation process proceeds without the filter device being attached, foreign matter flows into the circulation pump 107 and the chance of occurrence of problems such as restraint (lock phenomenon) of the pump motor increases. Is also required.

  In the control circuit diagram of FIG. 2, the control device 40 includes a control unit 16, a setting unit 17, a storage unit 18, a power switching unit 19, and the like, and controls a series of processes such as washing, rinsing, and dehydration. The control means 16 constituted by a microcomputer issues a control command to the power switching means 19 using a control program stored in the storage means 18 in response to a setting input such as selection of an operation course input from the setting means 17. Output.

  The power switching means 19 is configured by using a switching element such as an SCR (thyristor), and operates the motor 26, the water supply valve 53, the pump motor 109, the switching valve 112 and the like in accordance with a control command from the control means 16. Control.

  The motor 26 and the pump motor 109 are composed of, for example, a direct current brushless motor or the like. The motor 26 and the pump motor 109 are controlled by the control means 16 and the power switching means 19 so that the forward / reverse rotation and the rotation speed can be varied. Is input to the control means 16 to detect whether an appropriate current is consumed.

  In the control flowchart of FIG. 3, the washing water circulation process will be described.

  When the operation start input of the washing water circulation process is performed, the control means 16 performs a control operation in the steps described below.

  When the washing water circulation process is started in step (S200), the pump motor is turned on (S201), and the washing water circulation in the water receiving tub is started, and at the same time, the pump motor in the washing machine circulation process is operated only for the first time T1. The time switch of the setting to be started is started (S202).

  Whether the time for which the value of the time switch is set to the forward rotation of the pump motor in the washing water circulation process has reached the first time T1? Is detected (S203) and if the first time T1 has not been reached (NO), the pump motor forward rotation operation of the washing water circulation process is continued, and the first time when the value of the time switch is the end of the circulation process If T1 is reached (YES), the circulation pump is stopped (S204), and the forward rotation operation of the pump motor in the washing water circulation process is terminated.

  Next, in order to remove lint or foreign matter adhering to the foreign matter catching filter, the pump motor is operated in reverse rotation (S205), and a time switch set to operate for the second time T2 in which the pump motor is rotated in reverse is started (S205). S206).

  Whether the value of the time switch has reached the second time T2 during which the pump motor rotates backward during the washing water circulation process? Is detected (S207), and if the second time T2 has not been reached (NO), the pump motor reverse rotation operation of the washing water circulation process is continued, and the second time T2 when the value of the time switch is the end of the circulation process (YES), the circulation pump is stopped (S204), and the pump motor forward rotation operation in the washing water circulation process is terminated.

  As described above, in the first embodiment, by rotating the pump motor 109 in the reverse direction, a reverse water flow is generated on the filter hose 106 side, and the lint or foreign matter attached to the foreign matter catching filter 103 is removed. By eliminating clogging of the foreign matter catching filter 103, it is possible to prevent the function of the circulation pump from being lowered and the washing and rinsing performance from being lowered.

(Embodiment 2)
FIG. 4 is a diagram showing a control flowchart of the drum type washing machine in the second embodiment of the present invention.

  In step (S200), when the washing water circulation process is started, the pump motor is normally turned ON (S201), and at the same time as the washing water circulation in the water receiving tank is started, the pump motor for the washing machine circulation process is rotated first. A time switch set to operate at time T1 is started (S202).

  Whether the current value of the pump motor 109 is detected by the current detection means 12, and the value is input to the control means 16 to check whether it is below the first predetermined value. Is detected (S210).

  The first predetermined current value is a current value in a state in which the pump motor 109 is normally rotated and the circulating water discharge hose 114 exhibits a normal discharge capacity by stirring the pump impeller 108.

  When the current value is equal to or less than the first predetermined current value (YES), the foreign matter catching filter is clogged with lint and foreign matter such as clothes buttons, so the work amount is reduced and the pump motor 109 is lightly loaded. This is because the drive of the pump motor 109 is stopped (S211).

  Next, in order to remove the lint or foreign matter adhering to the foreign matter catching filter, the pump motor is operated in reverse rotation. (S212). Whether the current detection unit 12 detects the current value of the pump motor 109 and inputs the value to the control unit 16 to check whether the current value exceeds the second predetermined value. Is detected (S213).

  The second predetermined current value refers to a current value in a state where the pump motor 109 rotates in the reverse direction and the pump impeller 108 agitates and exhibits a normal discharge capacity toward the filter hose 106 side.

  When the current value is equal to or smaller than the second predetermined current value (NO), the foreign matter trapping filter is clogged with foreign matter such as lint and clothes buttons, the work amount is reduced, and the pump motor 109 is lightly loaded. Because of this, the pump motor continues to rotate backward.

  When the current value is equal to or greater than the second predetermined current value (YES), foreign matter such as lint and clothing buttons adhering to the foreign matter catching filter is removed by the reverse rotation operation of the pump motor, the work volume is increased, and the pump motor 109 is turned on. Since the load is high, it is determined that the first time T1 has elapsed, and the reverse rotation operation of the pump motor is stopped (S214).

  Next, the pump motor is returned to the forward rotation operation (S201) again, the forward rotation time T1 time switch of the washing water circulation process is started (S202), and the current value of the pump motor 109 is subsequently detected by the current detection means 12. Whether the value is inputted to the control means 16 and is not less than the first predetermined value? Is detected (S210).

  When the current value is equal to or less than the first predetermined current value (NO), the foreign matter catching filter is not clogged with foreign matter such as lint and clothes buttons, the flow resistance does not increase, and the pump motor 109 is Since the load is not low, the pump motor 109 continues the forward operation.

  Next, it is determined whether or not the normal rotation time T1 of the washing water circulation process has been reached (S203), and if not reached (NO), the pump motor continues normal rotation, but if it has reached (YES), the pump The motor is stopped (S208), and the washing water circulation process is ended (S209).

  In the present embodiment, the clogging of the foreign matter trapping filter is detected from the motor current of the circulation pump. However, the configuration may be such that the amount of circulating water is directly detected.

  As described above, in the second embodiment, the current detection means 12 of the pump motor 109 detects whether or not the foreign matter capturing filter is clogged, and when it is clogged, the pump motor is turned off. Reverse to remove lint or foreign matter adhering to the foreign matter catching filter. If the current detection means 12 of the pump motor 109 detects that the current value has increased, it is determined that the lint or foreign matter attached to the foreign matter catching filter has been removed, and the reverse rotation operation of the pump motor is stopped. By doing so, it is possible to efficiently prevent clogging of the foreign matter catching filter, to prevent the function of the circulation pump from being lowered, and to prevent the washing and rinsing performance from being lowered.

  As described above, the washing machine according to the present invention removes lint or foreign matter adhering to the foreign matter catching filter by reversely rotating the motor that drives the circulation pump, and ensures the amount of circulating water and is easy to wash. Since it is possible to prevent the performance from being lowered, the present invention can be widely applied not only to a washing machine but also to various devices and apparatuses that use a circulation pump that requires the installation of a filter.

DESCRIPTION OF SYMBOLS 12 Current detection means 21 Rotating drum 22 Drain hole 23 Water receiving tank 32 Outer box 40 Control apparatus 103 Foreign material capture filter 104 Filter body 107 Circulation pump 109 Pump motor 111 Filter knob

Claims (3)

The washing machine has an outer box, a water receiving tub configured inside the outer box, a rotating drum in which a large number of drain holes are formed on the outer periphery rotatably arranged in the water receiving tub, and a pump motor. A circulating pump that returns the washing water in the water receiving tank from the bottom of the water tank to the upper side of the rotating drum, a foreign matter capturing filter configured between the water receiving tank and the circulating pump, and a filter body of the foreign matter capturing filter. A filter knob for operating the mounting from the outside of the outer box, and a control device configured with current detection means for detecting the current of the pump motor, wherein the control device drives the pump motor to rotate in the forward direction. A washing water circulation process for returning the washing water in the water receiving tank from the bottom of the water tank to the upper side of the rotating drum by a circulation pump is executed for a first time, and the pump motor is reversely rotated after the first predetermined time has elapsed. That after the stroke has been executed a second time, the control Drum-type washing machine to terminate a stroke of the reverse rotation. The control device reversely rotates the pump motor when the current value during the forward rotation operation of the pump motor of the circulation pump falls below the first predetermined value regardless of whether or not the first time has elapsed. The drum type washing machine as set forth in claim 1. When the current value during the reverse rotation operation of the pump motor of the circulation pump exceeds the second predetermined value, the control device performs the reverse rotation of the pump motor regardless of whether or not the second time has elapsed. The drum type washing machine according to claim 1 or 2, wherein the drum type washing machine is stopped.

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