JP2011217919A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine that reduces the possibility of the remaining detergent dissolving into the washing water which is supplied into the washing tub from the water supply port at end of the water supply path, by ensuring that detergent dissolving out from the detergent storage part disposed in the middle of the water supply path during water supply is fully dissolved into the washing water at the bottom end of the water supply path.SOLUTION: The washing machine comprises a detergent storage part 6 and a water feed pump 55 which are disposed in the middle of the water supply path 5 to supply washing water into a washing tub 2. The water supply from the water supply source connected to the connection port 50 passes a feed valve 51, a first water supply pipe 52, and a water supply head 53, from which it is supplied to the detergent storage part 6 resulting in washing water containing detergent B. Then the washing water is supplied to the water supply pump 55 via a second water supply pipe 54. The water supply pump 55 stirs and compresses the washing water that flows in and then deliver it to a third water supply pipe 56, and supplies the washing water into the water tub 2 via a water supply opening 58 and a shower head 59.

Description

  The present invention relates to a washing machine including a detergent storage part in the middle of a water supply channel for supplying washing water into a washing tub.

  In recent years, drum-type washing machines, which have been widely used, elastically support a bottomed cylindrical washing tub with an opening on one side upward or sideways, and a bottomed cylindrical rotation inside the washing tub. The drum is configured to be rotatably supported on the same axis with the opening on one side facing the same side as the opening of the washing tub. The laundry is put into the rotating drum through the opening of the washing tub, immersed in the washing water accumulated at the bottom of the washing tub, and washed by repeatedly lifting and dropping by the rotation of the rotating drum, and then rinsed. Finished through a dehydration operation and a drying operation.

  Many of this type of washing machine includes a water supply path for supplying washing water into the washing tub, and further includes a detergent container in the middle of the water supply path (see, for example, Patent Document 1). The water supply channel has a water supply opening that opens in the washing tub at one end, a connection port with the water supply source at the other end, and opens the water supply valve provided near the connection port, thereby supplying water from the water supply source. Is supplied into the washing tub through the water supply port.

  The detergent container provided in the middle of such a water supply channel is used to put an appropriate amount of detergent in accordance with the amount of laundry before the start of washing. When the washing operation is started in this state and the above-described water supply is performed, the water flowing through the water supply passage flows through the detergent storage tank, and the detergent in the detergent storage portion is dissolved into the flowing water. As a result, washing water containing an appropriate amount of detergent components is supplied to the inside of the washing tub, and the washing water wets the laundry, so that washing can be performed under good conditions from the beginning. Become.

JP 2008-49006 A

  As a water supply source connected to the water supply channel as described above, public water is generally used. In the detergent storage part provided in the water supply channel, the detergent components stored in the water supply flow backward. Measures to prevent entry into public water supply are necessary. For this reason, in a conventional washing machine, the detergent storage unit is an open container connected to the upstream side of the water supply channel, and is provided above the water supply port to supply water from the water supply source into the detergent storage unit. It is made to flow once and stay in a state where it is separated from the upstream water supply source, and sent out from the water supply port by natural fall.

  In a conventional washing machine having such a detergent container, the detergent in the detergent container is difficult to completely dissolve in the water supply, and remains undissolved in the wash water supplied into the washing tub through the water supply port. There is a risk of contamination. If the detergent remains undissolved, for example, the desired washing performance cannot be obtained immediately after the start of washing, and the washing time becomes longer. On the other hand, the undissolved detergent adheres to the inner wall of the washing tub and frequently Various problems such as forced cleaning will occur.

  Conventionally, in order to prevent the detergent from remaining undissolved, various measures have been taken, such as devising the size of the detergent container and the flow path shape, but a sufficient effect of preventing undissolved residue has not been obtained. is the current situation.

  The present invention has been made in view of such circumstances, and the detergent dissolved in the water supply in the detergent container is reliably dissolved in the wash water flowing in the water supply channel, and the detergent is supplied to the wash water supplied into the wash tub. An object of the present invention is to provide a washing machine that can alleviate the possibility of mixing of undissolved residue and solve various problems caused by the mixing.

  The washing machine according to the present invention includes a detergent storage part in the middle of a water supply path for supplying water from a water supply source into the washing tub, and dissolves the detergent stored in the detergent storage part in the water flowing through the water supply path. In the washing machine configured to supply washing water into the washing tub from a water supply port provided at an end of the water supply channel, the water supply channel is provided in the middle of the water supply channel on the downstream side of the detergent storage unit. Stirring means for stirring the wash water flowing inside is provided.

  In the present invention, the stirring means provided in the middle of the water supply channel stirs the washing water flowing in the water supply channel including the detergent in the detergent storage unit before supplying the washing tub to promote the dissolution of the detergent, Alleviates the possibility of undissolved detergent remaining in the washing water introduced into the tank.

  The washing machine according to the present invention is characterized in that the stirring means is a pump that pressurizes the water flowing in the water supply channel while stirring.

  In this invention, since the pump provided in the middle of the water supply channel agitates and feeds the wash water flowing through the water supply channel into the washing tub as it is pressurized, the configuration and arrangement of the water supply channel are restricted. There is nothing.

  The washing machine according to the present invention further includes a circulation channel for circulating the wash water in the washing tub during a washing operation, and the pump also serves as a circulation pump for pressurizing the circulation water in the circulation channel. And

  In this invention, the pump for stirring and pressurizing the washing water in the water supply channel is also used as a circulation pump provided in the circulation channel for circulating the washing water during the washing operation. Simplify the water supply channel structure.

  Further, in the washing machine according to the present invention, a plurality of the water supply ports are provided at different positions, and the water supply channel is branched downstream of the stirring means, and is connected to each of the plurality of water supply ports. Features.

  In this invention, there are provided a plurality of water supply ports through which the wash water in the water supply channel is fed into the washing tub, the water supply channels are branched, and the wash water is supplied from the respective water supply ports into the laundry tub. Is reliably wetted with washing water so that good washing performance can be obtained immediately after the start of washing after water supply.

  In addition, the washing machine according to the present invention is provided at a branch portion of the water supply channel, and includes a distribution unit that selectively distributes the wash water flowing through the water supply channel to each of the plurality of water supply ports. .

  In this invention, the plurality of water supply ports are selectively used by the distributing means, and the washing water supply position is changed according to the state in the washing tub such as the wetness, position, and amount of the laundry, for example. The laundry is wetted well so that good washing performance can be obtained immediately after the start of washing.

  In the washing machine according to the present invention, stirring that stirs the washing water containing the detergent flowing in the water supply channel in the middle of the water supply channel that supplies the washing water into the washing tub and downstream of the detergent container. Since the means is provided, it is possible to reduce the possibility that the washing water supplied into the washing tub from the water supply port at the end of the water supply channel contains undissolved detergent. It becomes possible to solve various problems caused by the undissolved residue of the detergent contained in the washing water supplied into the washing tub, such as being able to exhibit performance.

1 is a perspective view schematically showing an appearance of a washing machine according to the present invention. It is a longitudinal cross-sectional view which shows schematically the internal structure of the washing machine which concerns on this invention. It is a longitudinal cross-sectional view which briefly shows the internal structure of the washing machine which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view which briefly shows the internal structure of the washing machine which concerns on Embodiment 3 of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a perspective view schematically showing the appearance of a washing machine according to the present invention, and FIG. 2 is a longitudinal sectional view schematically showing the internal configuration of the washing machine according to the present invention.

  As shown in FIG. 2, the washing machine according to the present invention includes a washing tub 2 and a rotating drum 3 inside an outer box 1 constituting an exterior. The washing tub 2 is a large-diameter bottomed cylindrical body having an opening 20 on one side, and a plurality of support legs 21 (only one is shown) erected on the bottom surface of the outer box 1 with respect to a horizontal plane. The opening 20 is on the upper side, and is elastically supported while maintaining an inclined posture with an inclined axis.

  On the front surface of the outer box 1 (the left side surface in FIG. 2), a loading port 11 for the laundry A is opened at a position facing the opening 20 of the washing tub 2 so as to be opened and closed by the front lid 10. And the opening 20 of the washing tub 2 are liquid-tightly sealed by a bellows 12 made of an elastic material such as rubber.

  A rotating drum 3 is supported coaxially inside the washing tub 2. The rotating drum 3 is a bottomed cylindrical body slightly smaller in diameter than the washing tub 2, and an opening 30 for loading the laundry A is opened on one side. A drum motor 4 serving as a driving source for the rotary drum 3 is fixed outside the bottom surface of the washing tub 2. The drum motor 4 has a motor shaft 40 that penetrates the center of the bottom plate of the washing tub 2 in a liquid-tight manner and protrudes inside the washing tub 2. The rotary drum 3 is supported with the opening 30 facing the inside of the opening 20 of the washing tub 2 and a bottom portion connected to the protruding end of the motor shaft 40 of the drum motor 4. The inside of the washing tub 2 is configured to rotate.

  The rotary drum 3 includes a fluid balancer 31 provided around the opening 30. The fluid balancer 31 functions to absorb and mitigate vibrations associated with the rotation of the rotary drum 3. Further, as shown in FIG. 2, a large number of small holes 32 are formed through the entire surface of the peripheral wall of the rotary drum 3, and a baffle 33 extending in the axial length direction is formed on the inner surface of the peripheral wall of the rotary drum 3. However, a plurality of protrusions are provided with equal distribution in the circumferential direction. In FIG. 2, only a part of the small holes 32 and one baffle 33 are shown.

  As shown in FIG. 1, a door opening button 13 is provided near the front lid 10 on the front surface of the outer box 1. The front lid 10 is provided with a pressing portion 14 for performing a pressing operation when the front lid 10 is closed. The front lid 10 is opened by the operation of the door opening button 13, and is closed by gripping the peripheral portion and performing a closing operation, and pressing the pressing portion 14 from the outside. An insertion port 11 provided on the front surface of the outer box 1 faces the openings 20 and 30 of the washing tub 2 and the rotary drum 3, and the laundry A introduced from the insertion port 11 passes through the openings 20 and 30. As shown by a broken line in FIG. 2, it is introduced into the inside of the rotating drum 3, and is located in a state where it is deposited near the lowermost part of the rotating drum 3 that is supported by tilting.

  In the washing operation of the washing machine configured as described above, the opening 11 is opened by the front lid 10 on the front surface of the outer box 1 and the laundry A is put in. After the front lid 10 is closed, washing is performed as described later. Washing water is supplied into the tank 2 and the rotating drum 3, and the drum motor 4 is driven to rotate the rotating drum 3. The laundry A put into the rotary drum 3 is positioned near the bottom of the rotary drum 3 as indicated by a broken line in FIG. As described above, a large number of small holes 32 are formed through the peripheral wall of the rotating drum 3, and a plurality of baffles 33 project from the inner surface of the rotating drum 3. The object A is soaked in the washing water flowing into the rotary drum 3 through the small holes 32, repeatedly lifted and dropped by the action of the baffle 33, and repeatedly hit against the inner surface of the rotary drum 3.

  As shown in FIG. 1, an operation panel 15 including operation keys for various operations and a display unit for various displays is provided at the upper part of the front surface of the outer box 1. The operation panel 15 is connected to the operation control unit provided inside the outer box 1 and is located inside the operation panel 15. The washing operation and the rinsing operation, the dehydration operation and the drying after the washing operation are completed. The operation is executed as an independent operation or a series of operations related to each other by the operation of the operation control unit according to the operation of the operation panel 15.

  The washing machine according to the present invention is characterized by the structure of the water supply channel 5 for supplying washing water to the inside of the washing tub 2 and the rotating drum 3 before the washing operation as described above. As shown in FIGS. 1 and 2, a connection port 50 for connection with a water supply source is provided on the upper surface of the rear portion of the outer box 1. The connection port 50 is connected to a water supply valve 51 provided inside the outer box 1. The water supply valve 51 is a multiple solenoid valve having a plurality of water supply outlets. The first water supply outlet of the water supply valve 51 is connected to a water supply head 53 provided inside the front upper portion of the outer box 1 via a first water supply pipe 52 extending forward along the upper surface of the outer box 1.

  When the connection port 50 is connected to a water supply source (water supply) and the water supply valve 51 is switched to the first water supply outlet, the water supply from the water supply source that flows into the connection port 50 passes through the water supply valve 51 and the first water supply pipe 52. It is supplied to the water supply head 53 and sprayed downward from the water supply head 53 as indicated by an arrow in FIG.

  In addition, the 2nd water supply exit of the water supply valve 51 is connected to the dry air path which abbreviate | omitted illustration. When the water supply valve 51 is switched to the second water supply outlet, the water supplied from the water supply source is supplied into the drying air passage and used as cooling water for cooling the drying air. The cooling water is cooled in contact with the drying air led out from the rotary drum 3 into the drying air passage during the drying operation executed through the rinsing operation and the dehydration operation after the washing operation is completed, and the drying is performed. It acts to condense and liquefy the moisture contained in the wind. This drying operation is performed according to a known procedure, and detailed description including the configuration of the drying air path is omitted. The water supply valve 51 is switched by the operation of an operation control unit (not shown) at each stage of a series of operations.

  A detergent container 6 is provided below the water supply head 53. The detergent storage unit 6 includes a water receiving pan 60 and a detergent tray 61 that are disposed below the water supply head 53 so as to face each other. As shown in FIG. 1, the detergent tray 61 includes a front plate 62 that is exposed to the outside along with the operation panel 15 on the front upper outer surface of the outer box 1. The detergent tray 61 grips the front plate 62 and moves forward. Can be pulled out of the outer box 1 along a guide (not shown).

  The user pulls out the detergent tray 61, supplies the detergent B onto the detergent tray 61, and then pushes the detergent tray 61 into the outer box 1. Thereby, the detergent storage unit 6 is in a state where a predetermined amount of the detergent B is stored. The detergent tray 61 pushed into the outer box 1 is located between the water supply head 53 and the water receiving pan 61, and the water supplied downward from the water supply head 53 is on the water receiving pan 61 as described above. Pour onto detergent B.

  The water receiving pan 60 has a size capable of covering the entire lower portion of the detergent tray 61, and one end of the second water supply pipe 54 is connected to an outlet opened on the bottom surface. The water supplied from the water supply head 53 becomes wash water mixed with the detergent B on the detergent tray 61, falls on the water receiving pan 60 and stays on the water receiving pan 60, and then enters the second water supply pipe 54. Sent out.

  As described above, in the detergent storage unit 6, the water supplied from the water supply source is mixed with the detergent B, and then temporarily retained on the water receiving pan 60 and sent out. The washing water staying in the water receiving pan 60 does not come into contact with the water supply head 53, and the detergent component flows back to the water supply source connected to the upstream side of the water supply head 53, and is used as a water supply source. Can be prevented from being mixed in.

  The second water supply pipe 54 connected to the water receiving pan 60 extends rearward, is bent at the extension end, and extends downward on the rear side of the washing tub 2. The other end is connected to the suction side of a water supply pump 55 fixed to the bottom surface of the outer box 1. The feed water pump 55 is a centrifugal pump provided with an impeller rotating inside, and one end of a third feed water pipe 56 is connected to a discharge port extending upward. The third water supply pipe 56 extends upward along the outside of the bottom surface of the washing tub 2 and is connected to the outer end of the motor shaft 40 of the drum motor 4 via a joint 57. The motor shaft 40 includes a water supply hole 58 formed through the shaft center portion as shown by a broken line in FIG. 2, and an end portion of the water supply hole 58 that opens in the inner bottom surface of the washing tub 2 is a water supply port. Connected to the shower head 59.

  The water supply pump 55 is rotationally driven in synchronism with the switching of the water supply valve 51 to the first water supply outlet by the operation of the operation control unit at the time of water supply before washing. On the suction side of the water supply pump 55, the wash water sent into the second water supply pipe 54 is supplied by natural flow, and this wash water is pressurized by the water supply pump 55, and the third water supply pipe 56 and the water supply water are supplied. The water is fed into the shower head 59 through the hole 58, and is ejected from the shower head 59 as indicated by an arrow in FIG. 2 and supplied into the rotary drum 3 and the washing tub 2. The washing water supplied into the washing tub 2 is accumulated to the extent that the laundry A in the rotating drum 3 is immersed, as indicated by W in FIG. 2, and the rotating drum 3 is rotated in this state as described above. A washing operation is executed.

  In the washing machine according to the present invention configured as described above, the second water supply pipe on the downstream side of the detergent storage unit 6, more specifically, in the middle of the water supply path 5 for supplying water from the water supply source into the washing tub 2. A water supply pump 55 is provided between 54 and the third water supply pipe 56. As described above, the water supply pump 55 has a rotating impeller, and the washing water fed to the water supply pump 55 through the second water supply pipe 54 is added as described above by the action of the rotating impeller. Pressed and stirred.

  Therefore, the detergent B mixed in the wash water in the second water supply pipe 54 is sent out into the third water supply pipe 56 in a state where it is sufficiently dissolved in the wash water by stirring in the water supply pump 55, and the shower head. After 59, it is supplied into the washing tub 2. Since the washing water supplied in this way exhibits good washing performance immediately after the start of the washing operation performed after the end of water supply, the washing time can be shortened, and the undissolved detergent is washed away in the washing tub 2. The possibility of adhering and accumulating on the inner wall of the laundry tub 2 is reduced, and the washing tub 2 is not forced to be frequently cleaned.

  In the above embodiment, the pump (water supply pump 55) provided in the middle of the water supply channel 5 on the downstream side of the detergent container 6 is used as the stirring means. Since the water supply pump 55 agitates the washing water flowing in the water supply passage 5 and pressurizes the washing water, the water supply pump 55 is placed on the bottom surface of the outer box 1 lower than the washing tub 2 as shown in FIG. The water supply channel 5 (second water supply pipe 54 and third water supply pipe 56) on the downstream side of the detergent storage unit 6 can be set freely without being restricted in configuration.

  As the agitation means provided in the middle of the water supply path 5, for example, a rotating body that does not have a pumping action, such as a rotating blade that rotates by the action of flowing water in the water supply path 5, can be used. In this case, since water is supplied into the washing tub 2 by natural flow from the detergent storage unit 6, there is a structural restriction on the water supply path 5 on the downstream side of the detergent storage unit 6.

  In addition, a water conduit 22 is connected to the peripheral surface of the vicinity of the bottom plate, which is the lowest position, in the washing tub 2, and this water conduit 22 is a cylindrical filter case 23 disposed at the front lower part inside the outer box 1. It is connected to the. Inside the filter case 23 is housed a lint filter 24 that captures foreign matters such as fiber waste. The lower part of the filter case 23 is connected to a drain pipe 26 laid along the bottom surface of the outer box 1 through a drain valve 25. A circulation pump 27 is attached to the rear part of the filter case 23, and one end of a return pipe 28 is connected to the circulation pump 27. The return pipe 28 extends upward along the front portion of the washing tub 2, is connected to the front upper portion of the washing tub 2, and faces the inside of the rotating drum 3.

  The washing water supplied into the washing tub 2 is introduced into the filter case 23 through the water conduit 22 and fills the inside of the filter case 23. The circulation pump 27 is driven continuously or intermittently during the washing operation after the water supply. By this driving, the washing water in the filter case 23 is sucked into the circulation pump 27 and pressurized, and is sent to the upper part of the washing tub 2 through the return pipe 28, and from the tip of the return pipe 28 to the inside of the rotary drum 3. It pours onto the laundry A and acts to enhance the washing effect. The lint filter 24 provided in the filter case 23 functions to capture and remove foreign matters such as fiber waste contained in the circulating wash water as described above.

  The drain valve 25 provided at the lower part of the filter case 23 is opened after the washing operation is completed. With this opening, the washing water inside the washing tub 2 is drained to the drain pipe 26 through the water conduit 22 and the filter case 23. Even during this drainage, foreign matters contained in the wash water are captured and removed by the lint filter 24 in the filter case 23, so that there is no possibility of being discharged to the sewer pipe through the drain pipe 26, thereby reducing the environmental load. be able to.

  FIG. 3 is a longitudinal sectional view schematically showing the internal configuration of the washing machine according to Embodiment 2 of the present invention. In this embodiment, the third water supply pipe 56 connected to the discharge side of the water supply pump 55 extends forward along the lower part of the washing tub 2 and is connected to the return pipe 28 connected to the discharge side of the circulation pump 27. It is connected through the switching valve 70 in the middle.

  The switching valve 70 has two switching positions. The switching valve 70 performs a switching operation in response to a command from the operation control unit, and is in a first switching position (water supply position) before the start of the washing operation, and in the second switching position (water supply position) during the washing operation. (Circulation position).

  When the switching valve 70 is switched to the water supply position, the third water supply pipe 56 communicates with the downstream side of the return pipe 28. Thus, the washing water pressurized and stirred as described above in the water supply pump 55 is sent to the front upper part of the washing tub 2 through the third water supply pipe 56 and the return pipe 28, and from the front end opening of the return pipe 28. 3 is ejected as indicated by an arrow in FIG. 3 and supplied to the inside of the washing tub 2 and the rotating drum 3. The washing water supplied in this way falls on the laundry A deposited on the bottom of the rotating drum 3 and accumulates in the washing tub 2 while wetting the laundry A, and in this washing water, an appropriate amount of the detergent B Therefore, in the washing operation after water supply, a good washing effect can be obtained immediately after the start, and the time required for the washing operation can be shortened.

  On the other hand, when the switching valve 70 is switched to the circulation position, the upstream side and the downstream side of the return pipe 28 are in communication with each other, and the washing water in the washing tub 2 is operated by the operation of the circulation pump 27 as described above. It is circulated and acts to enhance the washing effect of the laundry A. The other configuration of the washing machine shown in FIG. 3 is the same as that of the washing machine shown in FIG. 2, and the same components as those in FIG.

  In Embodiment 2, since a part of the circulating water channel provided to circulate the washing water during the washing operation is used as the water supply channel 5, the entire configuration of the water supply channel 5 can be simplified. .

  FIG. 4 is a longitudinal sectional view schematically showing the internal configuration of the washing machine according to Embodiment 3 of the present invention. In this embodiment, a circulating water pipe 71 extending from the rear end portion of the filter case 23 is connected to the suction side of the water supply pump 55 together with the second water supply pipe 54. A return pipe 28 is connected via a switching valve 72 in the middle of the third water supply pipe 56 connected to the discharge side of the water supply pump 55.

  As in the embodiment shown in FIG. 1, the third water supply pipe 56 extends upward along the outer bottom surface of the washing tub 2 and is connected to a water supply hole 58 formed through the motor shaft 40 through a joint 57. Has been. Similarly to the embodiment shown in FIGS. 1 and 2, the return pipe 28 extends forward along the lower part of the washing tub 2, further extends upward, and is connected to the front upper part of the washing tub 2. Then, it faces the inside of the rotating drum 3.

  The switching valve 72 has two switching positions. The switching valve 72 performs a switching operation in accordance with a command from the operation control unit, and is in a first switching position (water supply position) before the start of the washing operation, and in the second switching position (water supply position) during the washing operation. (Circulation position).

  When the switching valve 72 is switched to the water supply position, the third water supply pipe 56 is in a state where the upstream side and the downstream side are in communication with each other, and the water supply pump 55 sucks and adds washing water flowing from the second water supply pipe 54. Pressure and agitation are sent to the third water supply pipe 56. This washing water is fed into the shower head 59 through the water supply hole 58, and is ejected from the shower head 59 as indicated by an arrow in FIG. 4 and supplied into the rotary drum 3.

  On the other hand, when the switching valve 72 is switched to the circulation position, the third water supply pipe 56 communicates with the return pipe 28. The water supply pump 55 sucks the wash water in the filter case 23 through the circulation water pipe 71, pressurizes it, and sends it out into the third water supply pipe 56. This washing water flows through the return pipe 28 and is sent to the front upper part of the washing tub 2 and pours into the laundry A in the rotary drum 3 from the opening at the front end of the return pipe 28. Thereafter, the water guide pipe 22, the filter case 23 and the circulating water pipe 71 are sucked into the feed water pump 55 and circulated for use. The other configuration of the washing machine shown in FIG. 4 is the same as that of the washing machine shown in FIGS. 2 and 3, and the same reference numerals as those in FIGS. Is omitted.

  In Embodiment 3 as described above, the water supply pump 55 provided for stirring and pressurizing the washing water in the middle of the water supply channel 5 also serves as a circulation pump for circulating the washing liquid during the washing operation. In addition, it is not necessary to provide a means exclusively for stirring, and the configuration can be simplified.

  The switching valve 72 may be set to the second switching position during water supply, and may be set to the first switching position during the washing operation. In addition to the first and second switching positions, the switching valve 72 may have a third switching position that communicates the discharge side of the water supply pump 55 with both the third water supply pipe 56 and the return pipe 28. Good. The third switching position can be realized at one or both of water supply before the washing operation and circulation during the washing operation.

  When the switching valve 72 is set to the third switching position at the time of water supply, the wash water pressurized and stirred by the water supply pump 55 is sent to both the third water supply pipe 56 and the return pipe 28, and the bottom center of the rotary drum 3 is supplied. The water is ejected from the shower head 59 and is also ejected from the front end of the return pipe 28 at the upper front of the washing tub 2, and is supplied with water evenly distributed in the rotary drum 3. As a result, the laundry A in the rotating drum 3 is reliably wetted by the washing water in which the detergent is well dissolved, and can exhibit good washing performance from the beginning of washing.

  When the switching valve 72 is set to the third switching position during the washing operation, the washing water circulating as described above by the operation of the water supply pump 55 is the shower head 59 in the center of the bottom surface of the rotating drum 3 and the front upper part of the washing tub 2. Return to the rotary drum 3 from both ends of the return pipe 28. Such washing water reliably falls onto the laundry A in the rotating drum 3 and can further improve the washing performance.

  At the time of water supply, the switching valve 72 may be appropriately switched to the first, second, and third switching positions described above. This switching can be realized, for example, by the operation of the operation control unit according to the wetness of the laundry A in the rotating drum 3 and the level of the washing water accumulated in the washing tub 2.

  In the above embodiment, a washing machine in which the rotating drum 3 and the washing tub 2 are supported in an oblique posture inclined with respect to a horizontal plane, that is, a so-called oblique drum type washing machine, has been described. Needless to say, the present invention is also applicable to a drum-type washing machine in which the washing tub 2 and the rotating drum 3 are supported in a vertical posture or a horizontal posture.

2 Washing tank 3 Rotating drum 5 Water supply path 6 Detergent storage
22 Conduit pipe (circulation channel)
28 Return pipe (circulation channel, water supply channel)
55 Water supply pump (stirring means)
59 Shower head (water supply port)
72 Switching valve (sorting means)

Claims (5)

A detergent storage section is provided in the middle of the water supply path for supplying water from the water supply source into the washing tub, and the detergent stored in the detergent storage section is dissolved in the water flowing through the water supply path and provided at the end of the water supply path. In the washing machine configured to supply washing water into the washing tub from the water supply port,
A washing machine comprising stirring means for stirring the wash water flowing in the water supply channel in the middle of the water supply channel on the downstream side of the detergent container.   The washing machine according to claim 1, wherein the stirring means is a pump that pressurizes the water flowing in the water supply channel while stirring.   The washing machine according to claim 2, further comprising a circulation water channel for circulating the washing water in the washing tub during a washing operation, wherein the pump also serves as a circulation pump for pressurizing the circulation water in the circulation water channel.   The said water supply opening is provided with two or more in a different position, The said water supply path is branched in the downstream of the said stirring means, and is connected to each of a some water supply opening. The washing machine described in one.   The washing machine according to claim 4, further comprising a distribution unit that is provided at a branch portion of the water supply channel and selectively distributes wash water flowing through the water supply channel to each of the plurality of water supply ports.

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