JP2012065865A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of enhancing the rinsing effect by increasing the volume of circulation water during rinsing.SOLUTION: The washing machine comprises: a circulation water passage 11 including a pump 12 for circulating washing water in a water receiving tub 2; a lint filter 17 provided in the circulation water passage 11; a second circulation passage 20 branching on the downstream side of the lint filter 17 and including a detergent filter 21; a bypass passage 22 branching on the upstream side of the detergent filter 21; detergent determination means 23 for determining whether detergent fed into the machine is liquid detergent or not; and control means 26 for controlling a driving motor 7 and the like to successively control the steps of washing, rinsing and dewatering, in which the control means, when the detergent fed into the machine is the liquid detergent, allows the washing water to be circulated to a rotary drum 3 through the bypass passage 22 at the rinsing step.

Description

  The present invention relates to a washing machine for washing laundry such as clothes.

  Conventionally, this type of washing machine generally purifies washing water using a purification filter, circulates washing water and performs washing and rinsing. In addition to the lint filter that removes lint from the laundry, it is considered to provide a detergent filter that removes the detergent component so that rinsing can be performed efficiently through the detergent filter during rinsing (for example, Patent Documents). 1). It is also considered to determine the type of detergent used for washing (for example, see Patent Document 2).

JP-A-11-276794 JP-A-5-345094

  However, the conventional configuration has a problem that the detergent filter is finely formed to remove the detergent component, and the passing detergent component is captured by the detergent filter and the amount of circulating water is reduced. In general, rinsing can be performed by removing the detergent contained in the laundry fibers by passing the washing water, and by increasing the amount of washing water passing through the laundry, that is, by increasing the amount of circulating water. , The rinsing effect can be enhanced.

  On the other hand, if the detergent used is a powder detergent, it may not dissolve during washing, and if the amount is more than the amount appropriate for the amount of water, or if the water temperature is low, etc., the detergent is removed at the time of rinsing. It is useful to do. However, when the detergent used is a liquid detergent, there is no problem as described above, and it is a problem to increase the amount of circulating water and increase the rinsing effect.

  This invention solves the said conventional subject, and it aims at providing the washing machine which can increase the amount of circulating water at the time of a rinse, and can improve the rinse effect.

  In order to solve the above-described conventional problems, a washing machine of the present invention includes a circulation water channel provided with a pump for circulating washing water in a water receiving tub, a lint filter provided in the circulation water channel, and a downstream of the lint filter. A second circulation path having a detergent filter branched on the side, a bypass path branched on the upstream side of the detergent filter, a detergent determination means for determining whether or not the introduced detergent is a liquid detergent, a drive motor, etc. Control means for sequentially controlling each step of controlling, washing, rinsing, and dehydration. The control means performs washing to the rotating drum through the bypass passage in the rinsing step when the introduced detergent is a liquid detergent. The water is circulated.

  Accordingly, when a liquid detergent is used, the washing water can be circulated to the rotating drum without passing through the detergent filter at the time of rinsing, and the rinsing effect can be enhanced by increasing the amount of circulating water.

When the liquid detergent is used, the washing machine of the present invention can increase the circulation amount of the washing water during rinsing, and can enhance the rinsing effect.

Sectional drawing of the washing machine in Embodiment 1 of this invention Configuration diagram of detergent determination means of the washing machine Enlarged view of the main part showing the flow of washing water during rinsing when using the powder detergent of the washing machine Enlarged view of the main part showing the flow of washing water during rinsing when using the liquid detergent of the washing machine Sectional drawing of the washing machine in Embodiment 2 of this invention Enlarged view of the main part showing the flow of washing water during rinsing when using the powder detergent of the washing machine Enlarged view of the main part showing the flow of washing water during rinsing when using the liquid detergent of the washing machine

  A first invention includes a water receiving tank elastically supported in a housing, a rotating drum rotatably provided in the water receiving tank, a drive motor for rotationally driving the rotating drum, and the water receiving tank A circulation water channel provided with a pump for circulating the washing water, a lint filter provided in the circulation water channel, a second circulation channel provided with a detergent filter branched downstream of the lint filter, and an upstream side of the detergent filter And a detergent judging means for judging whether or not the introduced detergent is a liquid detergent, and a control means for controlling the drive motor and the like, and sequentially controlling each step of washing, rinsing and dehydrating. In the rinsing step, the control means circulates the wash water to the rotating drum through the bypass passage when the detergent is a liquid detergent, so that the circulation at the time of rinsing is performed. It is possible to increase the amount, it can be enhanced effectively removed by rinsing effect a soap which has entered the laundry.

  In the second aspect of the invention, in particular, the bypass passage of the first aspect of the invention is configured to branch from the circulating water channel on the upstream side of the lint filter, so that it passes through the lint filter that is difficult to flow by the lint captured during washing. Without washing, the washing water can be circulated smoothly and the rinsing effect can be enhanced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this plan is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a washing machine according to a first embodiment of the present invention, FIG. 2 is a configuration diagram of detergent determination means of the washing machine, and FIG. 3 is a washing water at the time of rinsing when using a powder detergent. FIG. 4 is an enlarged view of a main part showing a flow of washing water at the time of rinsing when using a liquid detergent.

  1 to 4, a water receiving tank 2 elastically supported by a damper (not shown) or the like is provided in a housing 1 of a drum type washing machine. A bottomed cylindrical rotating drum 3 is rotatably provided in the water receiving tank 2, and its rotating shaft 3a is inclined upward. A plurality of baffles 4 projecting inward in the direction of the rotating shaft 3a and a number of through holes 5 communicating with the inside of the water receiving tub 2 are provided on the inner peripheral side surface of the rotary drum 3, and a laundry is provided on the front side. An opening 6 is provided for taking in and out things.

  A drive motor 7 for rotating the rotary drum 3 is attached to the rear surface of the water receiving tank 2. The drive motor 7 is composed of a brushless DC motor, and the rotation speed can be freely changed by inverter control. A water supply valve 8 serving as a water supply means for supplying washing water into the water receiving tank 2 supplies the washing water into the water receiving tank 2 via a detergent charging case 10 for supplying a detergent provided in the water supply channel 9. The washing water supplied into the water receiving tub 2 flows into the rotating drum 3 from the through hole 5.

The washing water stored in the water receiving tank 2 can be circulated into the rotating drum 3 by the pump 12 provided in the circulation water channel 11. A suction portion 13 for sucking washing water communicating with the circulation water channel 11 is provided at the bottom of the water receiving tank 2, and washing water is discharged toward the inside of the rotating drum 3 at the upper portion of the opening 6 provided on the front side of the rotating drum 3. As shown in FIG.

  In the circulation water channel 11, a first on-off valve 15 is provided on the upstream side of the pump 12, that is, between the suction portion 13 and the pump 12. A drainage channel 16 for discharging the washing water in the water receiving tub 2 to the outside of the machine is connected to the circulation channel 11, and the drainage channel 16 is connected to the circulation channel 11 by a first opening / closing valve 15 constituted by a three-way valve. Branched.

  When the first on-off valve 15 is switched to the circulation water channel 11 side, the washing water is circulated into the rotary drum 3 and the drainage channel 16 side is closed. Further, when switching to the drainage channel 16 side, the circulation water channel 11 side is closed, and the washing water in the water receiving tub 2 can be discharged to the outside of the machine, which also functions as a drainage valve.

  In the circulating water channel 11, a lint filter 17 is provided on the upstream side of the pump 12, that is, between the first on-off valve 15 and the pump 12, and the lint and the like discharged from the laundry are captured. The circulation channel 11 is provided with a second on-off valve 18 and a third on-off valve 19 on the downstream side of the pump 12.

  The second on-off valve 18 is constituted by a three-way valve. The second circulation path 20 is branched from the circulation water path 11 on the downstream side of the lint filter 17, and the detergent filter 21 is provided in the second circulation path 20. The detergent filter 21 captures the detergent component mixed in the washing water.

  The third on-off valve 19 is constituted by a three-way valve, and branches from the second circulation path 20 to the bypass path 22 upstream of the detergent filter 21, that is, between the detergent filter 21 and the second on-off valve 18. . The other of the bypass passages 22 communicates with the circulating water passage 11 leading to the discharge unit 14.

  The circulation channel 11 between the suction part 13 and the first on-off valve 15 is provided with a detergent determination means 23 for determining whether or not the introduced detergent is a liquid detergent. A light emitting element 24 such as an LED and a phototransistor It is comprised with the transmittance | permeability sensor comprised by the light receiving elements 25, such as.

  The portion sandwiched between the light emitting element 24 and the light receiving element 25 is formed of a light-transmitting material, and the light emitted from the light emitting element 24 is received by the light receiving element 25 through the wash water in the circulation water channel 11 and converted into a voltage. And output. For this reason, the detergent determination means 23 has a light-shielded sealed structure so that the light receiving element 25 does not receive light from the outside.

  The control means 26 provided in the housing 1 drives the drive motor 7, the water supply valve 8, the pump 12, the first on-off valve 15, the second on-off valve 18, the third on-off valve 19, etc. Each process such as rinsing and dehydration is sequentially controlled.

  Note that the laundry can be taken in and out through the opening 6 provided on the front side of the rotating drum 3 by opening the door 27 that can be opened and closed provided on the front surface of the housing 1.

  The operation and effect of the washing machine configured as described above will be described below. A door 27 provided to be openable and closable on the front side of the housing 1 is opened, the laundry is put into the rotating drum 3 through the opening 6, and a power switch (not shown) of an operation unit (not shown) provided in the housing 1 is shown. When the operation is started by turning on the start switch (not shown) and operating the start switch (not shown), the amount of laundry put in is detected by the cloth amount detecting means (not shown).

Laundry is performed in the order of a washing step, a rinsing step, and a dehydration step. Here, the washing step and the rinsing step will be described, and the description of the dehydration step will be omitted. The washing process is started following the determination of the amount of laundry that has been thrown in, and a water amount that is preset according to the detected amount of laundry is introduced into the water receiving tub 2 and the rotating drum 3.

  First, the water supply valve 8 is opened and water is supplied from the water supply pipe. The amount of water supply and each time of the washing operation are set in advance according to the amount of laundry that has been input. Washing water is supplied into the water receiving tub 2 through the water supply passage 9 while dissolving a predetermined amount of detergent put into the detergent charging case 10, and the washing water supplied into the water receiving tub 2 is transparent. It flows into the rotary drum 3 from the hole 5.

  The washing water supplied to the water receiving tank 2 passes through the detergent determination means 23 from the suction portion 13, enters the circulating water channel 11 through the first opening / closing valve 15 opened on the circulating water channel 11 side, and reaches the pump 12. . The amount of water supply is detected by a water level detection means (not shown). When a predetermined amount of washing water is supplied into the water receiving tub 2, the pump 12 is driven.

  Washing water in the water receiving tub 2 enters the circulating water channel 11 from the suction portion 13 and, as indicated by an arrow in FIG. 1, the detergent determination means 23, the first on-off valve 15, the lint filter 17, the pump 12, the second The on-off valve 18 passes through in this order, and is discharged from the discharge portion 14 toward the laundry in the rotary drum 3 and circulates.

  Thereby, the wash water in the circulation water channel 11 is always equal to the wash water in the rotating drum 3 and the water receiving tub 2, and the detergent determination means 23 emits light from the light emitting element 24 against the wash water flowing through the circulation water channel 11. The light receiving element 25 receives the received light, checks the change in the permeability of the washing water according to the output value from the light receiving element 25, and determines whether the supplied detergent is a liquid detergent.

  In addition to the wash water that enters the rotary drum 3 from the through hole 5 due to the rise of the wash water level in the water receiving tank 2, the pump 12 is driven to discharge the wash water from the discharge portion 14 into the rotary drum 3. Thus, it is possible to speed up the penetration of the washing water into the laundry.

  On the other hand, the rotary drum 3 is rotationally driven by a drive motor 7. The laundry in the rotary drum 3 is lifted along the rotation direction of the rotary drum 3 by the baffle 4 and falls from the upper part in the rotary drum 3 by gravity, and mechanical force at the time of dropping is effectively applied to the laundry. As described above, an operation of alternately repeating normal rotation and inversion at a rotation speed that does not stick to the inner peripheral side wall surface of the rotary drum 3 due to centrifugal force, for example, 50 rpm, is performed for a predetermined time. Thus, in the washing process, the wash water in the water receiving tank 2 circulates in the circulation water channel 11.

  When the predetermined washing time has elapsed, the control means 26 stops the operation of the pump 12 and switches the first on-off valve 15 to the drainage channel 16 side, closes the circulating water channel 11 side and closes the water receiving tank 2. Washing water is discharged out of the machine through the drainage channel 16.

  Next, a rinsing step is performed following the washing step. In the rinsing process, when a predetermined amount of washing water is supplied as in the washing process, the control means 26 drives the drive motor 7 to perform the operation of alternately rotating the rotating drum 3 forward and reverse, and the pump 12 is driven. And when it determines with the detergent thrown in by the detergent determination means 23 being a powder detergent, it switches the 2nd on-off valve 18 and the 3rd on-off valve 19 so that washing water may flow through the 2nd circulation path 20. .

  That is, the washing water in the water receiving tub 2 enters the circulating water channel 11 from the suction portion 13, and as shown by the arrow in FIG. 3, the detergent determination means 23, the first on-off valve 15, the lint filter 17 and the pump 12 are connected. After passing sequentially, it enters the second circulation path 20 branched by the second on-off valve 18, passes through the detergent filter 21, circulates from the discharge unit 14 into the rotary drum 3 through the circulation water path 11.

  Therefore, when the powder detergent is used, the washing water is circulated through the second circulation path 20 at the time of rinsing, so that the detergent contained in the washing water at the time of rinsing is captured by the detergent filter 21. And can be rinsed efficiently.

  And when it determines with the detergent thrown in by the detergent determination means 23 being a liquid detergent, the 2nd on-off valve 18 and the 3rd on-off valve 19 are switched so that washing water may flow through the bypass 22.

  That is, the washing water in the water receiving tub 2 enters the circulating water channel 11 from the suction portion 13, and as shown by the arrow in FIG. 4, the detergent determination means 23, the first on-off valve 15, the lint filter 17 and the pump 12 are connected. After passing sequentially, it enters the second circulation path 20 branched by the second on-off valve 18, further flows through the bypass path 22 through the third on-off valve 19, and passes through the circulation water path 11 without passing through the detergent filter 21. Then, it circulates from the discharge unit 14 into the rotary drum 3.

  Therefore, when liquid detergent is used, the washing water circulates through the bypass path 22 at the time of rinsing, so that there is no undissolved detergent and the flow rate is lowered by passing through the detergent filter 21. Therefore, a predetermined amount of circulating water can be secured and rinsing can be performed efficiently.

  As described above, in the present embodiment, if the supplied detergent is a liquid detergent, the washing water is circulated into the rotary drum 3 through the bypass path 22 in the rinsing step. When used, the washing water can be circulated to the rotating drum 3 without passing through the detergent filter 21 at the time of rinsing, and the rinsing effect can be enhanced by increasing the amount of circulating water.

(Embodiment 2)
FIG. 5 is a sectional view of a washing machine according to the second embodiment of the present invention, FIG. 6 is an enlarged view of a main part showing a flow of washing water at the time of rinsing when using a powder detergent, and FIG. It is a principal part enlarged view which shows the flow of the washing water at the time of rinsing. A feature of the present embodiment is that the bypass path 22 is configured to branch from the circulating water path 11 on the upstream side of the lint filter 17. Other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and the detailed description of the first embodiment is used.

  When it is determined that the detergent introduced by the detergent determination means 23 is a liquid detergent, the first on-off valve 15 and the second on-off valve 15 are configured so that the washing water flows through the bypass path 22 without passing through the lint filter 17. The valve 18, the third on-off valve 19, and the fourth on-off valve 28 are switched.

  That is, the washing water in the water receiving tub 2 enters the circulating water channel 11 from the suction portion 13 and passes through the detergent determination means 23 as shown by the arrow in FIG. It flows into the drainage channel 16 through the first on-off valve 15 switched to the 16 side. The drainage channel 16 is provided with a fourth on-off valve 28 that is configured to close the drainage channel 16 side and flow to the circulating water channel 11 side via the pump 12.

  The washing water that has reached the pump 12 without passing through the lint filter 17 enters the bypass passage 22 through the second on-off valve 18 and the third on-off valve 19 in the same manner as in the first embodiment, and enters the circulation water passage 11. Then, it circulates from the discharge unit 14 into the rotary drum 3.

Therefore, when liquid detergent is used, the washing water enters the drainage channel 16 through the first on-off valve 15 during rinsing, and sequentially passes through the fourth on-off valve 28 and the pump 12, and then the second on-off valve 18. Enters the second circulation path 20 branched from the flow path, passes through the bypass valve 22 through the third on-off valve 19, and rotates from the discharge section 14 through the circulation water path 11 without passing through the lint filter 17 and the detergent filter 21. By circulating in the drum 3, there is no undissolved detergent content, and there is no decrease in flow rate due to passing through the lint filter 17 and the detergent filter 21, so a predetermined amount of circulating water can be secured. It can be rinsed efficiently.

  The fourth on-off valve 28 also functions as a drain valve, and when draining, the drainage channel 16 side can be opened to discharge the washing water in the water receiving tank 2 to the outside of the machine.

  As described above, in the present embodiment, the bypass passage 22 is configured to branch from the circulation water passage 11 on the upstream side of the lint filter 17, so that when the liquid detergent is used, the washing water is rinsed at the time of rinsing. Without passing through the filter 17 and the detergent filter 21, it can be circulated to the rotary drum 3, and the rinsing effect can be enhanced by increasing the amount of circulating water.

  As described above, the washing machine according to the present invention is useful as a washing machine because when the liquid detergent is used, it is possible to increase the circulation amount of washing water at the time of rinsing and to enhance the rinsing effect. is there.

DESCRIPTION OF SYMBOLS 1 Case 2 Water receiving tank 3 Rotating drum 7 Drive motor 11 Circulating water path 12 Pump 17 Lint filter 20 Second circulating path 21 Detergent filter 22 Bypass path 23 Detergent judging means 26 Control means

Claims (2)

A water receiving tub elastically supported in the housing, a rotating drum rotatably provided in the water receiving tub, a drive motor for rotationally driving the rotating drum, and washing water in the water receiving tub are circulated. A circulation channel having a pump, a lint filter provided in the circulation channel, a second circulation channel having a detergent filter branched downstream of the lint filter, and a bypass channel branched upstream of the detergent filter , A detergent determination means for determining whether or not the introduced detergent is a liquid detergent, and a control means for controlling the drive motor and the like, and sequentially controlling each step of washing, rinsing and dehydration, the control means, A washing machine in which washing water is circulated to the rotating drum through the bypass passage in the rinsing step when the introduced detergent is a liquid detergent. The washing machine according to claim 1, wherein the bypass passage is configured to branch from the circulation water passage upstream of the lint filter.

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