JP2014054277A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine including a pump capable of carrying out drainage and circulation of water.SOLUTION: The washing machine includes: a washing and dewatering tub 22; a water receiving tub 21 for enclosing a washing and dewatering tub 22; a drive motor 25 for rotating the washing and dewatering tub 22; a pump 31 for sucking water in the water receiving tub 21; control means 34 for controlling the drive motor 25 and the pump 31 and successively controlling a series of washing, rinsing and dewatering processes. The pump 31 has a rotation runner 42 that is normally and reversely rotatable, a drain-side outlet 47 for draining water to the outside of the machine, and a circulation-side outlet 46 for circulating water to the water receiving tub 21. The control means 34 drives the pump 31 in a normal rotation direction to discharge water in the water receiving tub 21 from the drain-side outlet 47 to the outside of the machine during a drainage operation and a dewatering operation, and drives the pump 31 in a reverse direction for discharging water in the water receiving tub 21 from the circulation-side outlet 46 and circulating the water to the water receiving tub 21 again during a washing operation and a rinsing operation. Thus, it is possible to drain and circulate washing water with a single pump with a simple structure.

Description

  The present invention relates to a washing machine provided with a pump that can drain washing water even in high places where natural drainage is not possible.

  Conventionally, a washing machine equipped with this type of pump has been proposed to have a function of operating the pump to drain the washing water in the aquarium out of the machine and a function of circulating the washing water into the aquarium again. (For example, refer to Patent Document 1).

  FIG. 4 is a longitudinal sectional view of a conventional washing machine described in Patent Document 1. As shown in FIG.

  In FIG. 4, water and hot water are mixed from a water supply valve 2 and a hot water supply valve 3 provided above the washing machine outer frame 1 and supplied to the washing tub 4. A drain valve 5 is disposed on the discharge side of the washing tub 4, and a drain path 6 and a pump 7 are disposed downstream of the drain valve 5. A drainage channel 8 is disposed on the downstream side of the pump 7, and a switching valve 9 is disposed in the middle of the drainage channel 8. Then, with the switching valve 9 switched to the drain hose 10 side, the drain valve 5 is opened and the pump 7 is driven so that the washing water in the washing tub 4 passes through the drain path 8 and the switching valve 9. And drained from the drain hose 10 to the outside.

  Further, by opening the drain valve 5 and driving the pump 7 with the switching valve 9 switched to the bypass path 11 side, the washing water in the washing tub 4 is drained by the drain path 8, the switching valve 9, and the bypass. It is circulated and supplied to the mixing supply unit 12 via the path 11. At the same time, a temperature detector 13 for controlling the temperature of the supplied washing water, a water level detector 14 for detecting the water level of the washing tub 4, and a controller (not shown) for controlling the respective steps of washing, rinsing and dehydration, While circulating the wash water, the water of the water supply valve 2 and the hot water supply valve 3 are mixed and supplied to the wash water tank 4.

  As described above, the stroke control is performed with a configuration having different functions of draining or circulating the wash water with a single pump.

JP-A-6-170079

  However, in the conventional configuration, the two functions of drainage and circulation are realized by switching the switching valve with a single pump. However, since the switching valve has a large installation space, the design of the component arrangement is limited. There was a problem that there were many restrictions, and a problem that foreign matter clogging such as detergent scum and lint was likely to occur inside the switching valve due to the passage of washing water.

  The present invention solves the above-described conventional problems, and provides a washing machine capable of realizing drainage and circulation of washing water with a single pump without using a complicated configuration using a switching valve or the like. It is an object.

In order to achieve the above object, the washing machine of the present invention rotates a washing / dehydrating tub that contains laundry, a water receiving tub that rotatably includes the washing / dehydrating tub, and the washing / dehydrating tub. A pump for sucking water in the water receiving tank, and a control means for controlling the drive motor and the pump to sequentially control a series of steps of washing, rinsing and dehydration. A rotating runner capable of rotating in the forward and reverse directions, a drain side outlet for draining outside the machine, and a circulation side outlet for circulating to the water receiving tank, and the control means controls the pump during draining and dewatering operations. Drive in the forward rotation direction, discharge the water in the water receiving tank from the outlet on the drain side and drain it to the outside of the machine. During the washing or rinsing operation, drive the pump in the reverse direction to drive the water receiving tank. The water inside is discharged from the circulation side outlet again It is obtained so as to circulate the water tub.

  Accordingly, the washing water can be drained and circulated with a single pump without a switching valve and with a simple configuration.

  The washing machine of the present invention has a simple configuration and can drain and circulate washing water with only one pump without providing a switching valve.

1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Structural drawing of the washing machine pump Structure diagram of pump in embodiment 2 of the present invention Vertical section of a conventional washing machine

  According to a first aspect of the present invention, there is provided a washing / dehydrating tub for storing laundry, a water receiving tub for rotatably containing the washing / dehydrating tub, a drive motor for rotating the washing / dehydrating tub, and the water receiving A pump for sucking water in the tank, and a control means for controlling the drive motor, the pump, and sequentially controlling a series of steps of washing, rinsing, and dewatering. A drain side outlet for draining outside the machine and a circulation side outlet for circulation to the water receiving tank, and the control means drives the pump in the forward rotation direction during the drainage operation and dehydration operation, The water in the water receiving tank is discharged from the drain side outlet and drained to the outside of the machine. At the time of washing or rinsing operation, the pump is driven in the reverse direction, and the water in the water receiving tank is discharged from the circulation side outlet. So that it can be discharged and circulated back to the water receiving tank. It allows a simple configuration, only one pump without providing a switching valve, it is possible to perform drainage and circulation of the washing water.

  According to a second aspect of the invention, in particular, the pump according to the first aspect of the invention includes a partition plate provided on the outer peripheral side of the rotary runner and formed in a concave shape toward the rotary runner, and a rotary shaft provided adjacent to the partition plate. The direction plate can be rotated to a predetermined angle by driving the pump in the forward rotation direction or the reverse rotation direction, so that only the rotation direction of the rotary runner of the pump is switched. Washing water can be drained and circulated.

  In the third invention, in particular, the pump according to the first invention has a drain-side check valve that stops the flow toward the pump chamber provided at the drain-side outlet and a flow toward the pump chamber provided at the circulation-side outlet. By having the circulation-side check valve for stopping, the washing water can be drained and circulated only by switching the rotation direction of the rotary runner of the pump.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine including a pump according to the first embodiment of the present invention.

  In FIG. 1, a water receiving tank 21 is elastically supported in a washing machine body 20 by a suspension (not shown) or the like, and the water receiving tank 21 has a bottomed cylinder having a large number of small holes 23 on an outer peripheral wall. A washing and dewatering tub 22 made of a rotating drum having a shape is rotatably included.

  The washing and dewatering tub 22 is provided with a large number of small holes 23 on the outer peripheral wall and clothing stirring protrusions 24 on the inner peripheral wall. The washing / dehydrating tub 22 is driven to rotate by a drive motor 25 attached to the outer wall on the back side of the water receiving tub 21 and its rotational speed and direction can be changed. A door body 26 that can be opened and closed is provided on the front side of the washing machine body 20.

  A water supply electromagnetic valve 28 to which a water supply hose 27 is connected is disposed above the water receiving tank 21, and a detergent case 39 to which the other end of the water supply hose 27 is connected from the water supply electromagnetic valve 28, and a detergent case 39. The tap water is supplied to the water receiving tank 21 through a water channel hose 38 provided between the water receiving tank 21 and the water receiving tank 21.

  A pump 31 is connected to a drain port 29 formed below the water receiving tank 21 via a flexible bellows tube 30.

  A water level sensor 33 is disposed in the vicinity of the drain 29 of the water receiving tank 21 via an air trap 32. The water level sensor 33 changes the air pressure in the air trap 32 into an electric signal, and receives the water. The water level (water amount) of the washing water supplied into the tank 21 is detected.

  A control means 34 is disposed in the lower part of the inside of the washing machine body 20, and the control means 34 controls the water supply electromagnetic valve 28, the drive motor 25, the pump 31, and the like, and a series of washing, rinsing, draining, dehydration, and the like. The process is controlled sequentially. Further, the water level data in the water receiving tank 21 detected by the water level sensor 33 is sequentially input to the control means 34.

  A drain hose 35 is connected to a drain side outlet 47 (see FIG. 2) of the pump 31, and an external drain hose 36 is connected to the drain hose 35. Then, the washing water inside the water receiving tub 21 is drained out of the machine during the drainage operation or during the drainage and the dehydration operation for shifting from drainage to dehydration.

  A circulation hose 37 is connected to the circulation side outlet 46 (see FIG. 2) of the pump 31, and the other end of the circulation hose 37 is connected to a detergent case 39 provided at the upper part of the water receiving tank 21. During the washing operation and the rinsing operation, the pump 31 is driven and the washing water sent from the water receiving tank 21 to the circulation hose 37 is circulated into the water receiving tank 21 via the detergent case 39 and the water channel hose 38. Is done. The operation of the pump 31 during draining and circulation will be described in detail with reference to FIG.

  Note that the pump 31 is constituted by, for example, an induction motor, and enables forward and reverse rotation by switching phases, and switches between drainage and circulation depending on the rotation direction.

  FIG. 2 is a structural diagram of the pump as seen from the rotating runner side of the washing machine according to the first embodiment of the present invention.

  In FIG. 2, the pump 31 is provided with a rotary runner 42 that rotates around a shaft portion 52 inside a substantially cylindrical pump chamber 41. An arcuate partition plate 43 that is concave toward the rotary runner 42 is formed inside the pump chamber 41 on the outer peripheral side of the rotary runner 42.

  A rotating shaft 44 that pivotally attaches the direction plate 45 is provided in the vicinity of the substantially central portion of the partition plate 43, and the direction plate 45 is a straight line that connects the shaft portion 52 and the rotating shaft 44 around the rotating shaft 44. On the other hand, it is rotatable to a predetermined angular position that is substantially symmetrical.

  In addition, the pump chamber 41 communicates with the pump chamber 41 on the downstream side of the direction plate 45 at a substantially symmetrical position with respect to the straight line connecting the shaft portion 52 and the rotating shaft 44, and the circulation side outlet 46 and the drain side outlet 47, and as described above, the circulation hose 37 is connected to the circulation side outlet 46, and the drain hose 35 is connected to the drain side outlet 47.

  The rotation runner 42 rotates in the CW direction (forward rotation direction) during drainage, and rotates in the CCW direction (reverse rotation direction) during circulation.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In each stroke, the rotating runner 42 rotates in the CW direction (forward rotation direction) at the time of draining operation for draining the washing water in the water receiving tub 21 or at the time of draining and dehydrating operation for shifting from draining to draining. At this time, the direction plate 45 is pushed by the water flow caused by the rotation of the rotating runner 42 so as to fall down to a predetermined angular position in the right direction. Then, the water is drained from the drainage hose 35 through the drainage hose 36 outside the machine.

  Further, during the rinsing operation in which the washing water in the water receiving tub 21 is circulated in the rinsing process, the rotary runner 42 rotates in the CCW direction (reverse rotation direction). At this time, since the direction plate 45 is pushed by the water flow caused by the rotation of the rotating runner 42 so as to fall down to a predetermined angular position in the left direction, the washing water is discharged in the direction of the circulation side outlet 46 to which the circulation hose 37 is connected. Then, it is circulated from the circulation hose 37 into the water receiving tank 21 through the detergent case 39 and the water channel hose 38.

  As described above, in the first embodiment, the arc-shaped partition plate formed concavely toward the rotation runner is formed on the outer peripheral side of the rotation runner, and the rotation provided in the vicinity of the approximate center of the partition plate. A direction plate attached to the shaft is formed on the outside of the partition plate, and the direction plate can be rotated to a predetermined angle that is substantially bilaterally symmetric. Drives and discharges water in the water receiving tank from the drain side outlet and drains it out of the machine. During circulation operation, the pump is driven in the reverse direction to discharge water in the water receiving tank from the circulation side outlet. Thus, the water can be circulated again to the water receiving tank, so that the washing water can be drained and circulated by switching the rotation direction of the pump with a single pump with a simple configuration.

(Embodiment 2)
FIG. 3 is a structural diagram of the pump as seen from the rotating runner side of the washing machine according to the second embodiment of the present invention. Except for the structure of the pump, the second embodiment is the same as the first embodiment, and a description thereof will be omitted.

  In FIG. 3, the pump 50 has a rotating runner 42 disposed in a substantially cylindrical pump chamber 51. A circulation side outlet 56 and a drain side outlet 57 are formed in a substantially symmetrical position on the outer left and right sides of the pump chamber 51 in communication with the pump chamber 51 in the tangential direction of the cylindrical wall portion 53.

  The circulation side outlet 56 is provided with a circulation side check valve 48 for passing the flow from the pump chamber 51 and stopping the flow toward the pump chamber 51, and the circulation hose 37 is connected thereto. The drain side outlet 57 is provided with a drain side check valve 49 that passes the flow from the pump chamber 51 and stops the flow toward the pump chamber 51, and is connected to the drain hose 35.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

In each stroke, the rotating runner 42 rotates in the CW direction (forward rotation direction) during a draining operation for draining the washing water in the water receiving tub 21 or during draining and dehydrating operations for shifting from draining to dehydrating. During the circulation operation in the easy stroke, the motor rotates in the CCW direction (reverse rotation direction).

  At the time of drainage operation or drainage and dewatering operation, the rotary runner 42 rotates in the CW direction (positive rotation direction), so the circulation side outlet 56 side becomes a flow toward the pump chamber 51 and the inside becomes negative pressure, and the circulation side The check valve 48 is closed. Then, the washing water is drained from the drain side outlet 57 through the drain hose 35 to the outside of the machine.

  Further, during the circulation operation in which the washing water in the water receiving tub 21 is circulated in an easy-to-wash process, the rotary runner 42 rotates in the CCW direction (reverse rotation direction). The flow toward 51 becomes a negative pressure inside, and the drain side check valve 49 is closed. Then, the washing water is discharged from the circulation side outlet 56 to the circulation hose 37 and is circulated into the water receiving tank 21 through the detergent case 39 and the water channel hose 38.

  As described above, in the second embodiment, the drain side check valve for passing the flow from the pump chamber and stopping the flow toward the pump chamber is provided at the drain side outlet of the pump, and the pump chamber is provided at the circulation side outlet. By providing a circulation-side check valve that stops the flow toward the pump chamber through the flow from the pump, washing water can be changed by switching the rotation direction of the pump with a single pump with a simple configuration. Can be drained and circulated.

  As described above, the washing machine equipped with the pump according to the present invention has a simple structure and has a pump because it can drain and circulate washing water with only one pump without providing a switching valve. Applicable to other washing machine applications.

DESCRIPTION OF SYMBOLS 21 Water receiving tank 22 Washing / dehydration tank 25 Drive motor 31, 50 Pump 34 Control means 41, 51 Pump chamber 42 Rotation runner 43 Partition plate 44 Rotating shaft 45 Direction plate 46, 56 Circulation side outlet 47, 57 Drain side outlet 48 Circulation Side check valve 49 Drain side check valve

Claims (3)

A washing / dehydrating tub for storing laundry, a water receiving tub for containing the washing / dehydrating tub rotatably, a drive motor for rotating the washing / dehydrating tub, and sucking water in the water receiving tub And a control means for controlling the drive motor, the pump, and sequentially controlling a series of steps of washing, rinsing, and dewatering. The pump drains out of the machine and a rotating runner capable of rotating forward and reverse. A drain side outlet and a circulation side outlet to circulate to the water receiving tank, and the control means drives the pump in the forward rotation direction during the draining operation and dehydrating operation to Is discharged from the drain side outlet and drained to the outside of the machine. At the time of washing or rinsing, the pump is driven in the reverse direction, and the water in the water receiving tank is discharged from the circulation side outlet and again the water. A washing machine that circulates to the receiving tank. The pump includes a partition plate provided on an outer peripheral side of the rotary runner and formed in a concave shape toward the rotary runner, and a direction plate having a rotation shaft provided adjacent to the partition plate, The washing machine according to claim 1, wherein the pump is rotated to a predetermined angle by driving the pump in a normal rotation direction or a reverse rotation direction. The said pump has the drainage side check valve which stops the flow which goes to the pump chamber provided in the said drainage side exit, and the circulation side check valve which stops the flow which goes to the pump chamber provided in the said circulation side exit. The washing machine as described in.