TWI736740B - Washing machine and its control device - Google Patents

Abstract

A washing machine is provided with: an outer tank; an inner tank arranged in the outer tank to communicate with the inside of the outer tank; and a circulation path connected to the outer tank in a manner that can circulate water in the outer tank. In addition, it is provided with: a circulation pump, which forms a flow of water in the circulation path; a driving part, which is driven by stirring the water in the inner tank; and a control device, which controls the circulation pump and the driving part. In addition, the control device drives the circulating pump and the driving unit during the water supply period, which is the period from when the water supply source starts to supply water to the inner tank until the water level of the inner tank reaches the washing water level.

Description

Washing machine and its control device

Field of invention

The invention relates to a washing machine and its control device.

Background of the invention

A washing machine having a function of circulating water in an outer tank is known. As an example, the washing machine disclosed in Japanese Patent Laid-Open No. 7-275557 has: a water supply path, which supplies water to the outer tank and the inner tank from a water supply source; a circulation path connecting the lower and upper parts of the outer tank; and a circulating pump installed in Circulation path; and pulsator, which stirs the water in the inner tank. This washing machine will perform the following actions in response to the request to start washing. Initially, the water supply channel will be opened so that water is supplied to the outer tank. When the water supply channel is opened, water containing detergent is supplied to the outer tank and the inner tank. Then, when the water level in the inner tank reaches the specified water level, the circulation pump will start to drive. Driven by the circulating pump, the water in the outer tank is drained from the upper part of the outer tank back into the outer tank through the circulation path, thereby forming a flow of water circulating in the outer tank, the inner tank, and the circulation path. Through the water circulation, the water in the inner tank will be stirred, so the detergent will foam, and foam will be generated in the outer tank and the inner tank.

Summary of the invention

When the foam is generated by the driving of the circulating pump, the foam in the inner tank In the distribution of, there may be large deviations. Therefore, there is a concern that the plurality of laundry items that have been washed include laundry that has not been sufficiently soiled.

One form of the washing machine related to the present invention includes: an outer tank; an inner tank arranged in the outer tank in communication with the outer tank; and a circulation path connected to the outer tank in a manner that can circulate water in the outer tank. In addition, it is provided with: a circulation pump, which forms a flow of water in the circulation path; a driving part, which is driven by stirring the water in the inner tank; and a control device, which controls the circulation pump and the driving part. In addition, the control device drives the circulating pump and the driving unit during the water supply period, which is the period from when the water supply source starts to supply water to the inner tank until the water level of the inner tank reaches the washing water level.

According to the washing machine and its control device related to the present invention, the foam is generated by the driving of the circulating pump, and the water in the interior is stirred by the driving of the driving part, thereby reducing the deviation of the foam distribution. The dirt removal situation on each clothing will become less easy to produce unevenness.

1: washing machine

10: body

11, 21, 31: shell

11A, 21A, 31A: top surface

11B: Inclined surface

12: The first opening

13: body cover

14: Operation Department

15: Display

20: Outer tank

21B, 31D: bottom

22: second opening

23: Outer tank cover

24: Upper opening

25: Lower opening

26: Drain opening

30: inner slot

31B: containment space

31C: Outer peripheral surface

32: The third opening

33: Connecting hole

40: detergent box

41: Containment Department 1

42: Containment Department 2

43: Confluence Road

44: Confluence opening

50: water supply pipe

51: 1st tube

51A: The first supply port

52: 2nd tube

52A: 2nd supply port

53: 3rd tube

53A: shower head

54: common pipe

55: Water supply valve

60: water supply hose

61: Water supply port

70: Loop Road

71: First Circulation Road

72: 2nd Circulation Road

73: filter

73A: Hole 1

73B: 2nd hole

73C: connecting hole

74: Locking part

74A: Drain bend

75: Circulating drainage

76: 2nd drain valve

80: Drainage way

81: The first drain valve

90: Circulating pump

91: impeller

91A: Blade

91B: Base

92: Circulation motor

92A: output shaft

92B: Rotor

92C: Stator

93: Shell

93A: bottom surface

100: Adjust the structure

110: pulsator

111: blade

112: base

120: Drive

121: Washing motor

122: Switching Department

130: Dry Road

140: Dryer

141: Blower

142: Fan Motor

143: heater

150: control device

SP: During the water supply period

SP1: Period 1

SP2: Period 2

SP3: Period 3

WL: Washing water level

WP: During washing

WP1: During the first wash

WP2: 2nd wash period

RS1: 1st rotation speed

RS2: 2nd rotation speed

RS3: 3rd rotation speed

RS4: 4th rotation speed

t1~t12, t21~t34: time

Fig. 1 is a schematic diagram of a washing machine in the embodiment.

Fig. 2 is a block diagram of the washing machine in the embodiment.

Fig. 3 is a perspective view showing the inside of the detergent box of the washing machine in the embodiment.

Fig. 4 is a plan view showing the inside of the outer tank and the inner tank of the washing machine in the embodiment.

Fig. 5 is a perspective view showing the circulation pump and its surroundings of the washing machine in the embodiment.

Fig. 6 is an action diagram showing the relationship between the impeller and the circulating motor constituting the circulating pump of the washing machine in the embodiment.

Fig. 7 is a diagram showing an example of the operation of the circulation pump in various washing strokes of the washing machine in the embodiment.

Fig. 8 is a time chart showing an example of the operation of the washing process in the first use state of the washing machine in the embodiment.

Fig. 9 is a time chart showing an example of the operation of the washing process in the second use state of the washing machine in the embodiment.

The form used to implement the invention

(Implementation form)

The washing machine 1 shown in FIG. 1 is an upright washing machine used for washing clothes. The washing machine 1 is used by being installed on a flat installation surface such as a floor (not shown). The washing machine 1 is driven by electric power supplied from an external power source (not shown) such as a commercial power source. In one example, the power cord (not shown) of the washing machine 1 is connected to an external power source, so that the power of the external power source is supplied to various electrical components constituting the washing machine 1.

The washing machine 1 includes a main body 10, an outer tank 20, and an inner tank 30. The main body 10 constitutes the appearance of the washing machine 1. The main body 10 includes a housing 11, a first opening 12, a main body cover 13, an operation unit 14, and a display unit 15. The housing 11 contains an outer tank 20 and an inner tank 30. An example of the material constituting the housing 11 is a metal material. An example of the shape of the housing 11 is a substantially rectangular parallelepiped. The first opening 12 is provided, for example, on the top surface 11A of the housing 11. The first opening 12 has a large small. The main body cover 13 is provided in the housing 11 such that the first opening 12 can be opened and closed.

The top surface 11A of the housing 11 includes an inclined surface 11B. The inclined surface 11B is provided, for example, in the top surface 11A on the back side of the washing machine 1 rather than the first opening 12, and is inclined so as to increase from the front side of the washing machine 1 toward the back side. The operation part 14 and the display part 15 are provided in the inclined surface 11B, for example. The function of the operation unit 14 is to input various information about the operation of the washing machine 1. In one example, the operating part 14 includes a function of switching the power supply of the washing machine 1 on and off. The function of the display unit 15 is to display various information about the operation of the washing machine 1.

The outer groove 20 is fixed in the housing 11 of the main body 10. The outer tank 20 includes a housing 21, a second opening 22, and an outer tank cover 23. The housing 21 houses an inner tank 30. An example of the material constituting the housing 21 is a resin material. An example of the resin material is polypropylene. An example of the shape of the housing 21 is a substantially cylindrical shape. The second opening 22 is provided, for example, on the top surface 21A of the housing 21 and faces the first opening 12. The second opening 22 has a size that allows clothing to be taken and placed. The outer tank cover 23 is provided in the housing 21 such that the second opening 22 can be opened and closed.

The inner tank 30 is provided in the outer tank 20 so as to communicate with the outer tank 20. The inner tank 30 can rotate relative to the outer tank 20. The inner tank 30 includes a housing 31, a third opening 32, and a plurality of communication holes 33. The housing 31 includes a storage space 31B, and the storage space 31B can store clothes. An example of the material constituting the housing 31 is a metal material. An example of a metal material is stainless steel. An example of the shape of the housing 31 is a substantially cylindrical shape. The third opening 32 is provided, for example, on the top surface 31A of the housing 31 and faces the second opening 22. The third opening 32 has a size that allows clothing to be taken and placed. In the state where the body cover 13 and the outer tank cover 23 are opened In this state, the clothes will be taken out through the first opening 12, the second opening 22, and the third opening 32. The plurality of communication holes 33 are provided on the outer circumferential surface 31C of the housing 31 so as to communicate with the storage space 31B and the inside of the outer tank 20, for example.

The washing machine 1 further includes a detergent box 40, a water supply pipe 50, and a water supply hose 60. The function of the detergent box 40 is to store detergent, softener, and the like. The detergent box 40 is provided, for example, in the housing 11 of the main body 10 above the outer tank 20. The function of the water supply pipe 50 is to supply water supplied from a water supply source (not shown) into the outer tank 20 and the inner tank 30. An example of a water supply source is a faucet. The water supply pipe 50 is connected to the detergent box 40 so as to supply water into the detergent box 40, for example. The water supply pipe 50 includes a water supply valve 55 (refer to FIG. 2). The function of the water supply valve 55 is to adjust the amount of water supplied from the water supply pipe 50. The function of the water supply hose 60 is to supply the water supplied into the detergent box 40 into the outer tank 20 and the inner tank 30. The water supply hose 60 connects the detergent box 40 and the outer tank 20, for example. The water flowing through the water supply pipe 50 is supplied to the detergent box 40, mixed with the detergent and softener in the detergent box 40, and then is supplied to the water supply hose 60, and from the water supply port 61 of the water supply hose 60 It is supplied into the outer tank 20 and the inner tank 30.

The outer tank 20 further includes an upper opening 24, a lower opening 25, and a drainage opening 26. The upper opening 24 is provided, for example, on the top surface 21A of the housing 21. The water supply hose 60 is connected to the upper opening 24 of the outer tank 20, for example. The lower opening 25 is provided in the bottom 21B of the housing 21, for example. The drain opening 26 is provided, for example, in the bottom 21B of the housing 21.

The washing machine 1 further includes a circulation path 70, a drainage path 80, and a circulation pump 90. The function of the circulation pump 90 is to form a flow of water in the circulation path 70. The circulation pump 90 is provided in the circulation path 70, for example. The details shown in Figure 6, The circulation pump 90 includes an impeller 91, a circulation motor 92, and a casing 93. The circulation motor 92 includes an output shaft 92A. The impeller 91 is provided on the output shaft 92A. The impeller 91 is housed in the housing 93. The circulation pump 90 rotates the impeller 91 to form a flow of water in the circulation path 70.

The circulation path 70 is connected to the outer tank 20 in a manner that can circulate the water in the outer tank 20. The circulation path 70 is connected to the upper opening 24 and the lower opening 25, for example. The circulation path 70 includes a first circulation path 71 and a second circulation path 72. The first circulation path 71 connects the lower opening 25 and the casing 93 of the circulation pump 90. The second circulation path 72 connects the casing 93 of the circulation pump 90 and the detergent box 40. In one example, the circulation path 70 is constituted by the first circulation path 71, the casing 93 of the circulation pump 90, the second circulation path 72, a part of the detergent box 40, and the water supply hose 60.

The drainage channel 80 is connected to the outer tank 20 in a manner capable of draining the water in the outer tank 20. The drainage channel 80 is connected to the drainage opening 26, for example. The drainage channel 80 includes a first drainage valve 81. The first drain valve 81 is opened when, for example, the water in the outer tank 20 and the inner tank 30 is drained. Since the lower opening 25 and the upper opening 24 connected to the circulation path 70, and the drain opening 26 connected to the drain path 80 are formed separately, the load on the following design is reduced. This design is used for Determine the design of the characteristics related to the flowing water in the circulation path 70 and the characteristics related to the flowing water in the drainage path 80. The characteristics related to flowing water include, for example, the flow rate of water flowing in the circulation path 70 and the drainage path 80.

The distance between the upper opening 24 and the lower opening 25 is longer than the distance between the upper opening 24 and the drain opening 26. By driving the circulation pump 90, the water in the outer tank 20 flows from the lower opening 25 to the circulation path 70, and is again supplied into the outer tank 20 from the upper opening 24, so water circulates in the outer tank 20, the inner tank 30, and the circulation path 70. Since the distance between the upper opening 24 and the lower opening 25 of the washing machine 1 is longer than the distance between the upper opening 24 and the drain opening 26, the water flowing in the outer tank 20 and the inner tank 30 is formed by circulating water. The path will become longer. Therefore, the water in the inner tank 30 will be easily stirred uniformly by the circulating water.

When the washing machine 1 is viewed from a plane, the upper opening 24 and the lower opening 25 sandwich the center of the outer tank 20, the center of the inner tank 30, and the center of the balancer (not shown) provided in the inner tank 30 . The function of the balancer is to balance the weight of the clothes contained in the inner tank 30. The balancer may be arranged in a ring shape along the edge of the third opening 32 in the inner tank 30, for example. In this configuration, since the distance between the upper opening 24 and the lower opening 25 becomes longer, the path of the water flow formed in the outer tank 20 and the inner tank 30 by the circulating water becomes longer. Therefore, the water in the inner tank 30 will be easily stirred uniformly by the circulating water.

The upper opening 24 is provided in a part of the outer tub 20 near the back of the washing machine 1. The lower opening 25 is provided in a portion of the outer tub 20 close to the front surface of the washing machine 1. In this configuration, since the water supplied from the upper opening 24 into the outer tank 20 flows obliquely from the upper part to the lower part in the inner tank 30, the water in the inner tank 30 can be stirred more easily and uniformly. In addition, the drain opening 26 is provided in the portion of the outer tub 20 near the back of the washing machine 1. Therefore, when the outlet (not shown) of the drain passage 80 is pulled out to the back side of the washing machine 1, the length of the drain passage 80 in the washing machine 1 can be shortened.

The washing machine 1 further includes a lock portion 74. The lock portion 74 is provided in the circulation path 70. The function of the blocking portion 74 is to block the flow of air in the circulation path 70 when the circulation pump 90 is stopped. Since the flow of air in the circulation path 70 is blocked by the blocking portion 74, the moisture in the circulation path 70 is prevented from being discharged back into the outer tank 20 unnecessarily. In addition, the blocking portion 74 is provided on the downstream side of the circulation pump 90 in the circulation path 70. In one example, the blocking portion 74 is provided in the second circulation path 72. Since the flow of moisture in the circulation pump 90 is blocked by the blocking portion 74, the moisture in the circulation path 70 is further suppressed from being discharged back into the outer tank 20 unnecessarily.

The latch 74 includes a drain trap 74A. The drain bend 74A is formed in a state where the washing machine 1 has been installed, and is formed to be located at a lower position than the upstream and downstream sides of the drain bend 74A in the second circulation path 72. Therefore, as the operation of the circulation pump 90 is stopped, water will accumulate in the drain bend 74A, and the flow of air in the circulation path 70 will be blocked. In this way, even if electric energy is not supplied to the lock portion 74, the function of the lock portion 74 can be exhibited, and therefore, the power consumption in the washing machine 1 can be reduced. An example of the shape of the drain bend 74A is a substantially U-shape.

The washing machine 1 is further provided with a circulating drainage channel 75. The circulation drainage passage 75 connects the circulation passage 70 and the drainage passage 80 so that the water in the circulation passage 70 can be drained. In one example, the circulating drain passage 75 connects the housing 93 of the circulating pump 90 and the drain passage 80. The circulation drain 75 includes a second drain valve 76. For example, the second drain valve 76 is closed when the circulation pump 90 is driven, and is opened when the operation of the circulation pump 90 stops, so that the water in the circulation path 70 is drained.

The washing machine 1 further includes a pulsator 110 and a driving unit 120. The function of the pulsator 110 is to stir the water in the inner tank 30. The pulsator 110 is, for example, rotatably provided on the bottom 31D of the housing 31 with respect to the inner tank 30. In one example, the pulsator 110 is rotatably installed with the center of the inner tank 30 as the center of rotation when the washing machine 1 is viewed in a plane. The pulsator 110 includes a plurality of blades 111 and a base 112. The plurality of blades 111 are formed on the base 112 so as to stand up from the base 112. An example of the number of blades 111 is four. An example of the shape of the blade 111 is an unequal triangle.

The driving part 120 is driven to stir the water in the inner tank 30. The driving unit 120 includes a washing motor 121 and a switching unit 122 (refer to FIG. 2). The output shaft (not shown) of the washing motor 121 is connected to the inner tank 30 and the pulsator 110 through the switching part 122. An example of the switching unit 122 is a clutch. When the washing motor 121 and the inner tank 30 are connected by the switching part 122, the inner tank 30 is rotated relative to the outer tank 20 by the driving of the washing motor 121. When the washing motor 121 and the pulsator 110 are connected by the switching part 122, the pulsator 110 is rotated relative to the inner tank 30 by the driving of the washing motor 121, and the water in the inner tank 30 is stirred.

The washing machine 1 further includes a drying path 130 and a dryer 140. The drying path 130 is connected to the outer tank 20 so as to be able to supply warm air into the inner tank 30. In one example, the drying path 130 connects the outer tank 20 and the drainage path 80. The function of the dryer 140 is to dry the clothes in the inner tank 30. The dryer 140 is installed in the drying path 130, for example. The dryer 140 is driven when the circulation pump 90 is stopped. Since the dryer 140 is driven in a state where the flow of air in the circulation path 70 is blocked by the blocking portion 74, the clothes can be dried efficiently.

In addition, there is a case where water vapor leaks out, that is, water vapor generated from the clothes during drying of the clothes leaks from the outer tub 20 through the circulation path 70. In one example, it is conceivable that the water vapor flowing into the detergent box 40 leaks from the gap formed between the detergent box 40 and its cover (not shown). In this example, there is a concern that water vapor leaking from the outer tub 20 adheres to various electrical components constituting the washing machine 1. However, in the washing machine 1, since the water vapor generated from the laundry is blocked by the blocking portion 74 while passing through the circulation path 70, the fear of the water vapor leaking from the outer tub 20 is reduced.

The dryer 140 includes a blower 141, a fan motor 142, and a heater 143 shown in FIG. 2. The function of the blower 141 is to generate wind in such a way that the air in the drying path 130 circulates. The blower 141 is, for example, a vortex fan having four blades. The function of the fan motor 142 is to rotate the blower 141. The output shaft (not shown) of the fan motor 142 is connected to the blower 141. The function of the heater 143 is to heat the air in the drying path 130. In one example, the heater 143 is provided on the downstream side of the blower 141 in the drying path 130. The blower 141 is driven by the fan motor 142 to rotate, and the wind generated by the blower 141 is heated by the heater 143, so that the warm air is supplied into the inner tank 30 through the outer tank 20.

The washing machine 1 further includes a control device 150. The control device 150 is provided, for example, in the main body 10 of the washing machine 1 (refer to FIG. 1). The function of the control device 150 is to control various actions related to the washing machine 1 in accordance with the operation of the operation unit 14. The control device 150 controls the driving unit 120, the circulating pump 90, the dryer 140, the water supply valve 55, and the first row, for example, according to the operation of the operating unit 14. The water valve 81, the second drain valve 76, and the like.

3, the structure of the detergent box 40 and the water supply pipe 50 is demonstrated.

The detergent box 40 includes a first accommodating part 41, a second accommodating part 42, a merging path 43, and a merging opening 44. The function of the first storage portion 41 is to contain detergent. In one example, the detergent is put into the first storage portion 41 from the outside of the washing machine 1. The function of the second storage portion 42 is to contain a softening agent. In one example, the softening agent is put into the second storage portion 42 from the outside of the washing machine 1. The function of the merging channel 43 is to merge water, detergent, softener, etc., the water is water supplied from the water supply pipe 50, the detergent is the detergent contained in the first container 41, and the softener is contained Softening agent in the second receiving part 42. The confluence passage 43 is connected to the first accommodating portion 41 and the second accommodating portion 42. The merging opening 44 is provided on the downstream side of the merging path 43, and is connected to the water supply hose 60 (refer to FIG. 1).

The water supply pipe 50 includes a first pipe 51, a second pipe 52, a third pipe 53, and a common pipe 54. The first pipe 51, the second pipe 52, and the third pipe 53 are branched from the common pipe 54. The first pipe 51 includes a first supply port 51A. The first supply port 51A faces the first housing portion 41, for example. The water flowing in the first pipe 51 is supplied to the first storage portion 41 through the first supply port 51A, and is mixed with the detergent stored in the first storage portion 41 to flow to the confluence passage 43. The second pipe 52 includes a second supply port 52A. The second supply port 52A faces, for example, the second accommodating portion 42. The water flowing in the second pipe 52 is supplied to the second storage portion 42 through the second supply port 52A, is mixed with the softening agent stored in the second storage portion 42, and flows to the junction channel 43.

The third tube 53 contains a shower head 53A. The shower head 53A is, for example, in the confluence passage 43, facing the part that is on the downstream side than the part that merges with water, and the water is supplied to the first accommodating part 41 and the second accommodating part 42 of water. When the water flowing in the third pipe 53 passes through the shower head 53A and is supplied to the confluence channel 43, the water containing detergent, softener, etc. tends to foam. The second circulation path 72 is, for example, in the detergent box 40, and is connected to a part that is on the downstream side than the part that merges with water in the confluence path 43, and the water is supplied from the shower head 53A water. When the water flowing in the second circulation path 72 merges with the water flowing in the confluence path 43, the water containing detergent, softener, etc. tends to foam.

4, the relationship between the lower opening 25 and the drain opening 26 will be described.

When the washing machine 1 is viewed from a plane, the lower opening 25 and the drain opening 26 are located at the center of the outer tank 20, the center of the inner tank 30, the center of the pulsator 110, and the balancer (not shown). The location of the center. In this configuration, since the distance between the lower opening 25 and the drain opening 26 becomes longer, foreign matter rushed by the water flow from the drain opening 26 toward the drain passage 80 does not easily flow to the lower opening 25. Therefore, it is difficult for foreign matter to enter the circulation path 70.

The area of the lower opening 25 is narrower than the area of the drain opening 26. Therefore, foreign objects such as coins do not easily flow into the circulation path 70. An example of a coin is a coin. The circulation path 70 includes a filter 73 (refer to FIG. 5). The filter 73 is provided in the lower opening 25, for example. The filter 73 is formed as a coin cannot pass through. Therefore, it is difficult for foreign objects such as coins to enter the circulation pump 90 (refer to FIG. 1) provided in the circulation path 70. The drain 80 does not include a filter. Therefore, the resistance of the water in the drainage channel 80 will be reduced, and the drainage performance will be improved.

As shown in FIG. 5, the filter 73 includes a first hole 73A, a second hole 73B, and a connecting hole 73C that form the lower opening 25. An example of the shape of the first hole 73A when the inner groove 30 is viewed in a plane is a circle. The shape of the second hole 73B is substantially the same as the shape of the first hole 73A. The first hole 73A and the second hole 73B are formed so that coins cannot pass through, and trash separated from the clothes with washing can pass through. Since the first hole 73A and the second hole 73B are formed in the filter 73, the resistance of the water in the filter 73 is reduced. In addition, by passing garbage through the holes 73A and 73B, the possibility that the passage area of the circulation path 70 becomes narrow due to the accumulation of garbage is reduced.

The connecting hole 73C is formed to connect the first hole 73A and the second hole 73B. In this configuration, when the first part including one end of the thread waste flows to the first hole 73A, and the second part including the other end of the thread waste flows to the second hole 73B, the part of the thread waste The third part between the first part and the second part can flow to the connection hole 73C. Therefore, the thread scraps are not easily caught in the filter 73.

The impeller 91 includes a plurality of blades 91A and a base 91B. The plurality of blades 91A extend radially from the base 91B. An example of the number of blades 91A is four. An example of the shape of the blade 91A is rectangular. In one example, by mounting the base 91B on the output shaft 92A (refer to FIG. 6) of the circulating motor 92, the impeller 91 is fixed to the output shaft 92A.

6, the configuration of the circulation motor 92 will be described.

The washing machine 1 further includes an adjustment structure 100. The adjustment structure 100 adjusts the position of the impeller 91 on the bottom surface 93A so that the distance between the impeller 91 and the bottom surface 93A of the housing 93 when the rotation of the circulation motor 92 is stopped is greater than that of the impeller 91 and the bottom surface 93A when the circulation motor 92 rotates. The interval between is narrower. The bottom surface 93A of the casing 93 is located below the impeller 91. When there is an opening in the portion of the casing 93 opposite to the lower part of the impeller 91, the top surface of the circulating motor 92 constitutes the bottom surface of the casing 93.

The adjustment structure 100 includes a circulating motor 92. The circulating motor 92 further includes a rotor 92B and a stator 92C. The rotor 92B and the stator 92C are arranged below the bottom surface 93A of the housing 93. The rotor 92B is connected to the output shaft 92A. The circulating motor 92 is driven by the electromagnetic force generated by the stator 92C, and the circulating motor 92 is stopped because the stator 92C eliminates the electromagnetic force.

In the circulating motor 92, as the stator 92C eliminates the electromagnetic force, the rotor 92B moves downward to leave the bottom surface 93A, thereby causing the impeller 91 to approach the bottom surface 93A. In addition, the circulating motor 92 is configured to move the rotor 92B upward to approach the bottom surface 93A as the electromagnetic force is generated by the stator 92C, whereby the impeller 91 can be separated from the bottom surface 93A. In one example, when the electromagnetic force of the stator 92C is eliminated, the impeller 91 will approach the bottom surface 93A due to its own weight. The two-dot chain line in FIG. 6 shows a state where the impeller 91 is close to the bottom surface 93A.

When the rotation of the circulation motor 92 is stopped, the distance between the impeller 91 and the bottom surface 93A becomes narrow. Therefore, when the circulation motor 92 is not rotating, when water flows in the circulation path 70, garbage such as thread scraps is formed. It becomes difficult to enter between the impeller 91 and the bottom surface 93A. Therefore, the water contained The trash such as thread scraps is not easy to get stuck on the circulating pump 90. In addition, since the circulation motor 92 serves as a drive source for rotating the impeller 91 and a mechanism for adjusting the position of the impeller 91, the structure of the device can be simplified. In addition, since it is configured as a mechanism for adjusting the position of the impeller 91 based on the relationship between the rotor 92B and the stator 92C, the configuration of the circulating motor 92 can be simplified.

The circulating motor 92 is configured such that when the stator 92C does not generate electromagnetic force, the impeller 91 comes into contact with the bottom surface 93A. Therefore, in a state where the circulation motor 92 is not rotating, when a flow of water is formed in the circulation path 70, it becomes difficult for dust such as thread scraps to enter between the impeller 91 and the bottom surface 93A.

1, an example of the operation of the control device 150 will be described.

The control device 150 memorizes a plurality of washing processes related to the washing of the clothes. The washing process includes at least the water supply period SP and the washing period WP (refer to FIG. 8). The water supply period SP is a period during which water is supplied to the inner tank 30 from the water supply source. Specifically, the water supply period SP is the period from when the water supply source starts supplying water into the inner tank 30 until the water level of the inner tank 30 reaches the washing water level WL. The washing water level WL is, for example, the water level of the inner tank 30 suitable for washing, and is preset according to the amount of clothes contained in the inner tank 30. The washing period WP is a period during which the laundry in the inner tub 30 is washed after the water supply period SP. The actions of the circulation pump 90 and the driving unit 120 in the plurality of washing processes, such as the water supply period SP, are substantially the same, and the actions of the circulation pump 90 in the washing period WP are different. The control device 150 executes the washing course selected according to the operation of the operation unit 14.

The control device 150 SP controls the circulating pump during the water supply period 90. The water supply period SP includes a first period SP1, a second period SP2, and a third period SP3 (see FIG. 8). The first period SP1 is a period during which the circulation pump 90 is driven. The second period SP2 is a period in which the circulation pump 90 is stopped after the first period SP1, or after the first period SP1, the circulation pump 90 is driven with a driving force weaker than the driving force in the first period SP1 period. In addition, the second period SP2 includes a point in time when the water level in the inner tank 30 has reached the washing water level WL.

In the first period SP1, as the circulation pump 90 is driven, the flow of water circulating in the outer tank 20, the inner tank 30, and the circulation path 70 is formed, and bubbles are generated in the outer tank 20 and the inner tank 30. In the second period SP2, when the circulation pump 90 is stopped, since water does not circulate in the path including the circulation path 70, the power to generate bubbles in the outer tank 20 and the inner tank 30 is weakened. In the second period SP2, when the circulation pump 90 is driven by a weak driving force, the flow strength of the circulating water becomes weak, so that foam is not easily generated in the outer tank 20 and the inner tank 30. In this way, in the second period SP2 in which the water level in the outer tank 20 and the inner tank 30 becomes higher than the first period SP1, the foam is formed in a state in which it is not easy to be generated, so the fear of the foam overflowing from the outer tank 20 is reduced. . In addition, in the washing water level WL where the water level in the outer tank 20 and the inner tank 30 is the highest, the foam overflows from the outer tank 20 because the circulating pump 90 has stopped or because the circulating pump 90 is driven by a weak driving force Doubts will be reduced even more. In one example, the second period SP2 is a period in which the circulation pump 90 is stopped after the first period SP1.

The problem of foam overflowing from the outer tank mainly occurs in washing machines that include a circulation path.

The washing machine of the first example (hereinafter referred to as "the first washing machine") is not included Including outer tank cover and drying road. In the first washing machine, it is conceivable that when a large amount of foam is generated in the inner tank, the foam will accumulate on the water surface in the outer tank and the inner tank, and the foam will pass through the second opening of the outer tank. Overflow situation.

The washing machine of the second example (hereinafter referred to as "the second washing machine") includes an outer tank cover and does not include a drying path. Since the outer tank cover of the second washing machine was not used for the purpose of enclosing the clothes in the inner tank and drying it with a dryer, the outer tank is required to escape the water vapor generated from the clothes. The second opening is not properly sealed by the outer tank cover, or a slit is formed in the outer tank cover in most cases. Therefore, it is conceivable that when a large amount of foam is generated in the inner tank, the foam will accumulate on the water surface in the outer tank and the inner tank, and the foam will penetrate between the outer tank and the outer tank cover. Gap, or overflow through the slit of the outer tank cover.

The washing machine of the third example (hereinafter "the third washing machine") includes an outer tank cover and a drying path. An example of the third washing machine is a drum-type washing machine. In the third washing machine, it is conceivable that when a large amount of foam is generated in the inner tank, the foam will accumulate on the water surface in the outer tank and the inner tank, and even the foam may overflow from the outer tank and enter the drying The situation on the road. At this time, there is a concern that the foam entering the drying path will adhere to the dryer.

The washing machine of the fourth example is the washing machine 1 shown in FIG. 1. The washing machine 1 may have the same problem as that of the third washing machine. Moreover, in the washing machine 1, when a large amount of foam is generated in the inner tank 30, the foam will accumulate on the water surface in the outer tank 20 and the inner tank 30, and even the foam will accumulate in the detergent box 40. At this time, it is conceivable that there will be the following situation, that is, from the outer tank 20 The overflowing foam will overflow from the gap formed between the detergent box 40 and its cover.

The third period SP3 is a period during which the circulation pump 90 is stopped before the first period SP1, or before the first period SP1, the circulation pump 90 is driven with a driving force weaker than the driving force in the first period SP1 period. In a state where the water level in the outer tank 20 and the inner tank 30 is low, since the amount of water in the outer tank 20 and the inner tank 30 is small, foam is not easily generated efficiently. In the washing machine 1, when the water level in the outer tank 20 and the inner tank 30 is low, the circulation pump 90 stops, or even when the circulation pump 90 is driven, its driving force is weak, so the energy use of the washing machine 1 Efficiency will be improved.

The third period SP3 includes a period from when the water supply source starts to supply water in the outer tank 20 to when the circulation pump 90 is filled with water. In one example, the control device 150 controls the circulation pump 90 to stop the circulation pump 90 in the third period SP3. Therefore, in the state where the circulating pump 90 contains air, the doubt that the circulating pump 90 will start to operate is reduced.

The control device 150 controls the circulation pump 90 so that the second period SP2 becomes longer than the third period SP3. Since the second period SP2 in which foam is less likely to be generated after the first period SP1, or the second period SP2 in which the generation amount of foam is small even if the foam is generated, becomes longer, the fear of foam overflowing from the outer tank 20 is further reduced. The lengths of the first period SP1, the second period SP2, and the third period SP3 are appropriately changed according to, for example, the amount of clothes contained in the inner tank 30.

The control device 150 controls the circulating pump 90 to repeat the driving and stopping of the circulating pump 90 in the first period SP1, or in the first period SP1 In SP1, the state where the driving force of the circulating pump 90 is strong and the state where the driving force is weak are repeated. When the water is continuously stirred with strong force for the formation of bubbles, there is a doubt that the volume of the bubbles will increase rapidly. In the washing machine 1, in the first period SP1 in which the circulating pump 90 is driven to generate bubbles, the driving of the circulating pump 90 is stopped or the driving force of the circulating pump 90 is weakened intermittently. The suspicion of foam overflowing from the outer tank 20 will be reduced. In one example, when the amount of clothes contained in the inner tank 30 is more than the predetermined amount, the control device 150 controls the circulation pump 90 in the first period SP1 so that the driving and stopping of the circulation pump 90 are repeated. Whether the amount of clothes contained in the inner tank 30 is more than a predetermined amount is determined based on the load acting on the washing motor 121 when the pulsator 110 is rotated.

During the water supply period SP, the control device 150 drives the driving unit 120 to control the operation of the pulsator 110. By the driving of the circulating pump 90 in the SP during the water supply period, foam is generated in the outer tank 20 and the inner tank 30, and the water in the inner tank 30 is stirred by the rotation of the pulsator 110. Therefore, the deviation of the distribution of the foam generated in the outer tank 20 and the inner tank 30 will be reduced, and the dirt removal conditions on the clothes in the inner tank 30 will not be uneven.

During the water supply period SP, the control device 150 drives the driving unit 120 while driving the circulation pump 90. Since the state where the water is circulated by the circulation pump 90 and the state where the water is stirred by the rotation of the pulsator 110 are formed together, the foam is efficiently generated. The control device 150 starts the driving of the circulation pump 90 and the driving unit 120 after the start time of the water supply period SP. In one example, the control device 150 maintains the state of stopping the drive unit 120 in the third period SP3, and in the first period SP1, The driving of the driving unit 120 is started. Since the circulating pump 90 and the driving part 120 will not be driven when the water level in the inner tank 30 is low, there is contact with the pulsator 110 that is rotated by the driving part 120, and the doubt of damage to the clothes will be raised. reduce.

The control device 150 stops the driving of the circulation pump 90 and the driving unit 120 during the water supply period SP. In one example, the control device 150 stops the driving of the driving unit 120 in the second period SP2. When the driving of the circulation pump 90 and the driving unit 120 is stopped, since water does not circulate, it is difficult for bubbles to be generated in the outer tank 20 and the inner tank 30. Therefore, the suspicion of foam overflowing from the outer tank 20 can be reduced.

The control device 150 controls the driving unit 120 so that the length of the period from the time when the driving of the driving unit 120 is stopped in the middle of the water supply period SP to the end time of the water supply period SP becomes longer than in the water supply period SP The length of the period during which the driving portion 120 is driven is longer. In one example, the control device 150 controls the driving unit 120 so that the second period SP2 becomes longer than the period during which the driving unit 120 is driven in the first period SP1. Therefore, the suspicion of foam overflowing from the outer tank 20 is further reduced.

The control device 150 controls the driving unit 120 so that the output of the driving unit 120 during the water supply period SP becomes smaller than the output of the driving unit 120 when the driving unit 120 is driven after the water supply period SP. In one example, the control device 150 controls the driving part 120 so that the output of the driving part 120 during the water supply period SP becomes smaller than the output of the driving part 120 during the washing period WP. Since in the water supply period SP in which the water level in the inner tank 30 is lower than the washing period WP, the output of the drive unit 120 will be small, so it is suppressed. It is damage to clothing caused by contact with the pulsator 110.

The control device 150 controls the driving unit 120 so that the maximum rotation speed of the driving unit 120 during the water supply period SP becomes lower than the maximum rotation speed of the driving unit 120 when the driving unit 120 is driven after the water supply period SP. In one example, the control device 150 controls the driving part 120 so that the maximum rotation speed of the driving part 120 during the water supply period SP becomes lower than the maximum rotation speed of the driving part 120 during the washing period WP. The rotation speed of the driving unit 120 has a correlation with the rotation speed of the pulsator 110. Therefore, even if the pulsator 110 is brought into contact with the clothes along with the driving of the driving part 120, the clothes are less likely to be damaged due to the low rotation speed of the pulsator 110. For example, during the washing period WP, the control device 150 controls the driving part 120 so that the driving part 120 is continuously driven.

7, an example of the operation of the circulation pump 90 in the washing period WP of various washing courses will be described. The value shown in brackets in FIG. 7 shows the time when the circulating pump 90 is driven or stopped. The unit of time is seconds.

In various washing processes, the control device 150 controls the circulation pump 90 so that the state of driving the circulation pump 90 and the state of stopping the circulation pump 90 are included in the washing period WP. When the circulation pump 90 is driven during the washing period WP, the flow of water circulating in the outer tank 20, the inner tank 30, and the circulation path 70 is formed, and bubbles are generated in the outer tank 20 and the inner tank 30. When the circulation pump 90 is stopped during the washing period WP, since water does not circulate in the path including the circulation path 70, the power to generate bubbles in the outer tank 20 and the inner tank 30 is weakened. In this way, it is not easy to generate bubbles in WP during washing. The state of foam, so the doubt of foam overflowing from the outer tank 20 will be reduced.

The control device 150 controls the circulation pump 90 during the washing period WP in various washing processes so that the period during which the circulation pump 90 is driven becomes longer than the period during which the circulation pump 90 is stopped. Therefore, during the washing period WP, the amount of foam suitable for washing is easily generated. The control device 150 stops the circulation pump 90 in the second half period including the end time of the washing period WP in various washing processes. During the second half of the washing period WP in which the stains of the clothes have been roughly removed, the amount of foam generated will have little effect on the final state of the washing of the clothes. Therefore, by stopping the circulation pump 90 in the second half of the washing period WP, it is possible to suppress the influence on the final state of washing of the clothes, and to reduce the suspicion of bubbles overflowing from the outer tub 20.

The washing period WP includes the first washing period WP1 and the second washing period WP2 (see FIG. 8). The first washing period WP1 is a period in which the output of the driving unit 120 is relatively high. The second washing period WP2 is a period in which the output of the driving unit 120 is relatively low. The control device 150 controls the circulation pump 90 so that the state in which the circulation pump 90 is driven is included in the first washing period WP1, and the state in which the circulation pump 90 is stopped is included in the second washing period WP2. By driving the circulation pump 90 in the first washing period WP1 in which the output of the driving unit 120 is high, the amount of foam generation becomes greater. Therefore, the ability to remove dirt from clothes will become stronger. By stopping the circulation pump 90 in the second washing period WP2 in which the output of the driving unit 120 is low, the amount of foam generation becomes smaller. Therefore, the suspicion of foam overflowing from the outer tank 20 can be reduced.

The control device 150 controls the driving unit 120 to make the second wash The maximum rotation speed of the driving unit 120 in the washing period WP2 becomes lower than the maximum rotation speed of the driving unit 120 in the first washing period WP1. Therefore, the amount of foam generated in WP2 during the second washing period will be further reduced, and the suspicion of foam overflowing from the outer tub 20 will be further reduced. The control device 150 controls the driving unit 120 so that the end time of the washing period WP is included in the second washing period WP2. Therefore, by driving the driving unit 120 with a lower output in the second washing period WP2 including the end time point of the washing period WP, it is possible to suppress the influence on the final state of the laundry and reduce the foam from Doubts about the overflow of the outer tank 20. In one example, the control device 150 controls the driving unit 120 in the second washing period WP2 in order to separate the plurality of clothes contained in the inner tub 30.

The control device 150 controls the circulation pump 90 so that the driving state and the stopped state of the circulation pump 90 are included in the first washing period WP1. In one example, at the end time of the first washing period WP1, the circulation pump 90 has stopped. As the continuous driving time of the circulating pump 90 becomes longer, the volume of the foam on the water surface in the inner tank 30 will increase, and the possibility of the foam overflowing from the outer tank 20 will increase. When the circulation pump 90 is continuously driven for a long time in the first washing period WP1 in which the output of the driving unit 120 is high, the possibility becomes higher. In the washing machine 1, the driving and stopping state of the circulating pump 90 is included in the first washing period WP1 in which the output of the driving unit 120 is high. Therefore, it is avoided that the circulating pump 90 is continuously driven for a long time, and the foam is prevented from outside. The suspicion of tank 20 overflow will be reduced.

The multiple washing strokes include long-term strokes and short-term strokes. Long stroke is a washing line with relatively long WP during washing Procedure. The long time course includes, for example, a first washing course, a second washing course, and a third washing course. The length of the long-time washing period WP is in the order of the first washing course, the second washing course, and the third washing course. The short time course is a washing course in which the WP during the washing period is relatively short. The short time course includes, for example, the fourth washing course, the fifth washing course, the sixth washing course, the seventh washing course, and the eighth washing course. The length of the washing period WP of the short time course is in the order of the 4th washing course, the 5th washing course, the 6th washing course, the 7th washing course, and the 8th washing course. In the eighth washing process, the circulation pump 90 is not driven during the washing period WP.

The control device 150 controls the circulation pump 90 so that the period during which the circulation pump 90 is stopped in a long-time stroke becomes longer than the period during which the circulation pump 90 is stopped in a short-time stroke. The period during which the control device 150 stops the circulation pump 90 refers to the total of the times during which the circulation pump 90 is stopped during the washing period WP. Since the period during which the circulation pump 90 is stopped in the long-time stroke is long, even when the washing period WP is relatively long, the suspicion of bubbles overflowing from the outer tub 20 is reduced.

During the long-term stroke, the control device 150 controls the circulating pump 90 so that the circulating pump 90 is driven intermittently. In one example, the control device 150 controls the circulating pump 90 in the first washing process and the second washing process in the long-time process, so that the circulating pump 90 is driven intermittently. When the circulating pump 90 is driven intermittently, a series of actions that stop after the circulating pump 90 is driven will be repeated. In a series of actions when the circulating pump 90 is intermittently driven, the time during which the circulating pump 90 stops is set according to the time during which the circulating pump 90 is driven. In a series of actions when the circulating pump 90 is driven intermittently, it is more ideal when the circulating pump 90 is driven. When the time is relatively long, in order to suppress foaming, the time for stopping the circulation pump 90 is also set to be relatively long.

In one example, in the first washing stroke, the control device 150 controls the circulating pump 90 so that the circulating pump 90 is driven for 400 seconds, then the circulating pump 90 is stopped for 120 seconds, then the circulating pump 90 is driven for 30 seconds, and then the circulating pump 90 is stopped 120 seconds, then the circulation pump 90 is driven for 30 seconds, and then the circulation pump 90 is stopped for 200 seconds. By intermittently driving the circulation pump 90, the period during which the circulation pump 90 is stopped becomes longer. Therefore, even when the washing period WP is relatively long, the fear of foam overflowing from the outer tank 20 is reduced.

The control device 150 controls the circulating pump 90 so that the driving time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven becomes longer than the driving time of the circulating pump 90 in the first half of the period in which the circulating pump 90 is intermittently driven The driving time is shorter. In addition, the control device 150 controls the circulating pump 90 so that the driving time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven becomes longer than that of the circulating pump 90 in the first half of the period in which the circulating pump 90 is intermittently driven The stopping time of the pump 90 is shorter. Since the foam generated in the outer tank 20 and the inner tank 30 will accumulate on the water surface in the inner tank 30, as the driving time of the circulating pump 90 during the intermittent driving of the circulating pump 90 becomes longer, the water surface The volume of the foam will become larger. In the washing machine 1, since the driving time of the circulation pump 90 in the second half period becomes shorter, the generation amount of foam is suppressed, and the doubt that the foam overflows from the outer tank 20 is reduced.

In one example, the control device 150 controls the circulating pump 90 to drive the circulating pump 90 at the end of the period during which the circulating pump 90 is intermittently driven. The driving time becomes shorter than the driving time of the circulating pump 90 in the first half of the period during which the circulating pump 90 is intermittently driven, and the stopping time of the circulating pump 90 in the first half of the period. Since the driving time of the circulation pump 90 at the end is shortened, the generation of foam will be more suppressed, and the doubt of foam overflowing from the outer tank 20 will be further reduced.

The control device 150 controls the circulating pump 90 so that the stop time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven becomes longer than the stop time of the circulating pump 90 in the second half of the period in which the circulating pump 90 is intermittently driven The 90's drive time is longer. In one example, the control device 150 controls the circulating pump 90 so that the stop time of the circulating pump 90 at the end of the period in which the circulating pump 90 is intermittently driven becomes longer than the stop time of the circulating pump 90 at the end of the period in which the circulating pump 90 is intermittently driven. The drive time is longer. Since the stop time of the circulation pump 90 at the end becomes longer, the generation of foam is suppressed, and the suspicion of foam overflowing from the outer tank 20 is reduced.

The control device 150 controls the circulating pump 90 so that as the length of the long-term stroke becomes longer, the period during which the circulating pump 90 is stopped in the washing period WP also becomes longer. Therefore, in the long-term stroke, the doubt of foam overflowing from the outer tank 20 will be further reduced. The control device 150 controls the circulating pump 90 in a short time stroke so that the intermittently driven state of the circulating pump 90 is not included. Therefore, in a short time stroke, when the circulating pump 90 is driven, the doubt that the amount of foam generation will decrease will be reduced.

The control device 150 executes a washing course selected according to, for example, the operation of the operation unit 14. In one example, before the control device 150 executes the washing stroke, it controls the driving unit 120 so that the pulsator 110 rotates at a predetermined rotation speed. The rotation speed rotates, and the amount of laundry contained in the inner tank 30 is determined based on the load acting on the washing motor 121. When the control device 150 determines that the amount of clothes contained in the inner tank 30 is less than the predetermined amount, it executes the washing process in the first use state described below. When the control device 150 determines that the amount of clothes contained in the inner tank 30 is greater than the predetermined amount, it executes the washing process in the second use state described below.

8, an example of the first use state of the washing machine 1 will be described. Fig. 8 shows an example of the operation of the first washing stroke in the first use state.

At time t1, the control device 150 controls the water supply valve 55 to supply water to the outer tank 20 and the inner tank 30 from the water supply source through the water supply pipe 50, the detergent box 40, etc., according to a predetermined water supply amount. An example of the prescribed water supply amount is 15L/min. The water supplied into the outer tank 20 and the inner tank 30 contains detergent, softener, and the like. The water level in the inner tank 30 continues to rise while being supplied with water from the water supply source. In addition, the control device 150 controls the switching unit 122 so that the washing motor 121 and the inner tub 30 are connected through the switching unit 122, and controls the washing motor 121 so that the inner tub 30 rotates at a predetermined rotation speed. An example of the predetermined rotation speed is 35 rpm. As the inner tank 30 rotates at a predetermined rotation speed, the plurality of clothes contained in the inner tank 30 are separated. The control device 150 does not drive the circulation pump 90 in the third period SP3, which includes the period from time t1 to time t2.

At time t2, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. The control device 150 continues to drive the circulation pump 90 in the first period SP1, which includes the period from time t2 to time t3. Period until now. Therefore, foam is easily generated in the outer tank 20 and the inner tank 30. Furthermore, at time t2, after the control device 150 controls the washing motor 121 to stop the rotation of the inner tub 30, it controls the switching unit 122 so that the washing motor 121 and the pulsator 110 are connected through the switching unit 122, and will control The washing motor 121 rotates the pulsator 110 at the first rotation speed RS1. An example of the first rotation speed RS1 is 110 rpm.

At time t3, the control device 150 controls the circulation motor 92 to stop the circulation pump 90. The control device 150 maintains the state of stopping the circulation pump 90 in the second period SP2, which includes the period from time t3 to time t4. In addition, at time t3, the control device 150 controls the washing motor 121 so that the rotation of the pulsator 110 is stopped. In the second period SP2 in which the water level in the outer tank 20 and the inner tank 30 becomes higher than the first period SP1, since the circulation pump 90 and the driving unit 120 have stopped, the foam is not easily formed in the outer tank 20 and the inner tank 30 The state of being generated within. Therefore, the suspicion of foam overflowing from the outer tank 20 can be reduced.

At time t4, the control device 150 determines that the water level of the inner tank 30 has reached the washing water level WL, and controls the water supply valve 55 to stop the water supply in the outer tank 20 and the inner tank 30 from the water supply source. The washing water level WL is the highest water level in the inner tank 30 during the washing process. The washing water level WL is set according to the amount of clothes contained in the inner tank 30. In addition, the control device 150 controls the washing motor 121 so that the pulsator 110 rotates at the second rotation speed RS2. An example of the second rotation speed RS2 is 120 rpm. The control device 150 detects the amount of water splashed from the water surface in the inner tank 30 (hereinafter referred to as "splash water") by rotating the pulsator 110 at the second rotation speed RS2, for example. When the amount of splashing water is more than the predetermined amount, there is a high concern that the bubbles generated in the outer tank 20 and the inner tank 30 overflow from the outer tank 20. In one example, when the control device 150 determines that the amount of splashing water is greater than the predetermined amount, it drains part of the water in the outer tank 20 and the inner tank 30, or suspends the washing process.

At time t5, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. During the washing period WP in the first washing step, the control device 150 controls the circulation motor 92 so that the circulation pump 90 is driven intermittently. In addition, the control device 150 controls the washing motor 121 so that the pulsator 110 rotates at the third rotation speed RS3. An example of the third rotation speed RS3 is 130 rpm. The control device 150 controls the washing motor 121 to continuously rotate the pulsator 110 at the third rotation speed RS3 in the first washing period WP1, which includes the period from time t5 to time t11. The washing machine 1 will start washing the laundry contained in the inner tub 30 after the time t5.

At time t6, the control device 150 controls the circulation motor 92 to stop the circulation pump 90. At time t7, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. At time t8, the control device 150 controls the circulation motor 92 to stop the circulation pump 90. At time t9, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. At time t10, the control device 150 controls the circulation motor 92 to stop the circulation pump 90. The control device 150 maintains the state where the circulation pump 90 is stopped after the time t10 during the washing period WP. Since the state of driving the circulation pump 90 and the state of stopping the circulation pump 90 are included in the washing period WP, during the washing period WP, a state in which bubbles are not easily generated is formed. therefore, The suspicion of foam overflowing from the outer tank 20 will be reduced.

At time t11, the control device 150 controls the washing motor 121 so that the pulsator 110 rotates at the fourth rotation speed RS4. An example of the fourth rotation speed RS4 is 80 rpm. As the pulsator 110 rotates at the fourth rotation speed RS4, the clothes contained in the inner tank 30 are separated. In addition, at time t12, the control device 150 controls the washing motor 121 to stop the rotation of the pulsator 110. In addition, the control device 150 controls the drain valves 76 and 81 so that the water in the outer tank 20 and the inner tank 30 is drained. After the above steps, the control device 150 will end the first washing process in the first use state.

The control device 150 executes at least one of the rinsing step, the dehydrating step, and the drying step after, for example, various washing processes are completed. In one example, the control device 150 will perform the washing step, the dehydration step, and the drying step in the order of the washing step.

The washing step is a step of washing the clothes contained in the inner tank 30. In one example, in the flushing step, the control device 150 controls the water supply valve 55 so that the outer tank 20 and the inner tank 30 are supplied with water again from the water supply source, and controls the washing motor 121 so that the inner tank 30 is The rotation speed rotates, and then the drain valves 76 and 81 are controlled so that the water in the outer tank 20 and the inner tank 30 is drained. An example of the predetermined rotation speed is 780 rpm. When the control device 150 performs the washing step, the dirt or bubbles attached to the clothes will be washed away.

The dehydration step is a step of dehydrating the clothes contained in the inner tank 30. In one example, in the dehydration step, the control device 150 controls the washing motor in a state where the water in the outer tank 20 and the inner tank 30 has been drained. 121 to rotate the inner tank 30 at a predetermined rotation speed. An example of the predetermined rotation speed is 780 rpm. When the control device 150 executes the dehydration step, the clothes contained in the inner tank 30 will be dehydrated.

The drying step is a step of drying the clothes contained in the inner tank 30. In one example, the control device 150 controls the fan motor 142 and the heater 143 during the drying step to supply warm air in the inner tank 30. When the control device 150 executes the drying step, the clothes contained in the inner tank 30 are dried.

Next, referring to FIG. 9, an example of the second use state of the washing machine 1 will be described. Fig. 9 shows an example of the operation of the first washing stroke in the second use state.

At the time t21, the control device 150 executes substantially the same processing as the processing executed at the time t1 (refer to FIG. 8). The control device 150 does not drive the circulation pump 90 in the third period SP3, which includes the period from time t21 to time t22.

At time t22, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. The control device 150 controls the circulation motor 92 so that the driving and stopping of the circulation pump 90 are repeated in the first period SP1, and the first period SP1 includes the period from time t22 to time t25. At time t23, the control device 150 controls the circulation motor 92 to stop the circulation pump 90.

At time t24, the control device 150 controls the circulation motor 92 to drive the circulation pump 90. In addition, after the control device 150 controls the washing motor 121 to stop the rotation of the inner tub 30, it controls the switching unit 122 so that the washing The pulsator motor 121 and the pulsator 110 are connected by the switching part 122, and the washing motor 121 is controlled to rotate the pulsator 110 at the first rotation speed RS1. At time t25, the control device 150 controls the circulation motor 92 to stop the circulation pump 90. The control device 150 maintains the state of stopping the circulation pump 90 in the second period SP2 from time t25 to time t26. In addition, the control device 150 controls the washing motor 121 to stop the rotation of the pulsator 110.

From time t26 to t34, the control device 150 executes substantially the same processing as the processing executed at time t4 to t12 (refer to FIG. 8). After the above steps, the control device 150 will end the first washing process in the second use state.

1, an example of the usage method of the washing machine 1 will be described.

The washing machine 1 may be used by the user as follows, for example. In the first procedure, the main body cover 13 and the outer tank cover 23 are opened, and the clothes are put into the storage space 31B of the inner tank 30 through the openings 12, 22, and 32. In the second procedure, detergent, softener, etc. are contained in the detergent box 40. In the third program, when the operating unit 14 is operated, the power of the washing machine 1 is set to be turned on, and an arbitrary washing course is selected.

The washing machine 1 executes the washing course selected by the third program. During the water supply period SP of the washing stroke, the control device 150 controls the circulation pump 90 so that the state of driving the ring pump 90 and the state of stopping the ring pump 90 are included. Therefore, a state in which foam is unlikely to be generated during the water supply period SP is formed, and the fear of foam overflowing from the outer tank 20 is reduced. Also, the control device 150 In the washing period WP of the washing process, the circulation pump 90 is controlled so that the state of driving the circulation pump 90 and the state of stopping the circulation pump 90 are included. Therefore, it is difficult to generate bubbles in the WP during the washing period, and the suspicion of bubbles overflowing from the outer tub 20 is reduced. In addition, after the laundry contained in the inner tub 30 is washed, the washed laundry is taken out from the storage space 31B of the inner tub 30 in the fourth program.

(Modification)

The description of the embodiment is an illustration of the form that the washing machine and its control device related to the present invention can take, and is not intended to limit the form. In addition to the embodiments, the present invention can employ, for example, modifications of the embodiments shown below, and a combination of at least two modifications that are not inconsistent with each other.

‧The control content in the first period SP1 of the water supply period SP can be changed arbitrarily. In the first example, in the first period SP1, the control device 150 controls the circulation pump 90 so that the strong driving force of the circulation pump 90 and the weak state are repeated. In the second example, when the amount of clothes contained in the inner tank 30 is more than the predetermined amount, the control device 150 controls the circulation pump 90 to continuously drive the circulation pump 90 in the first period SP1. In the third example, when the amount of clothes contained in the inner tank 30 is less than the predetermined amount, the control device 150 controls the circulation pump 90 so that the driving and stopping of the circulation pump 90 is controlled during the first period SP1. repeat.

‧The control content in the second period SP2 of the water supply period SP can be changed arbitrarily. In one example, in the second period SP2, the control device 150 controls the circulating pump 90 so that the circulating pump 90 is driven more rapidly than in the first period SP1. Drive with weaker driving force.

‧The control content in the third period SP3 of the water supply period SP can be changed arbitrarily. In one example, in the third period SP3, the control device 150 controls the circulation pump 90 so that the circulation pump 90 is driven with a driving force that is weaker than the driving force in the first period SP1.

‧The relationship between the second period SP2 and the third period SP3 in the water supply period SP can be changed arbitrarily. In the first example, the control device 150 controls the circulation pump 90 so that the second period SP2 and the third period SP3 have substantially the same length. In the second example, the control device 150 controls the circulation pump 90 so that the second period SP2 becomes shorter than the third period SP3.

‧The content of the third period SP3 in the water supply period SP can be changed arbitrarily. In the first example, the third period SP3 includes the period from when the water supply source starts to supply water in the outer tank 20 to before the circulation pump 90 is filled with water. In the second example, the third period SP3 includes a period from when the water supply source starts to supply water in the outer tank 20 until the water level of the inner tank 30 reaches a predetermined water level. An example of an ideal range related to the prescribed water level is 15~25mm. An example of the prescribed water level is 22mm.

‧The composition of SP during the water supply period can be changed arbitrarily. In the first example, the first period SP1 is omitted from the water supply period SP. According to this example, the control device 150 SP does not drive the circulating pump 90 during the water supply period. In the second example, at least one of the second period SP2 and the third period SP3 is omitted from the water supply period SP.

‧The period from the time when the driving of the driving unit 120 is stopped in the middle of the water supply period SP to the end time of the water supply period SP The relationship between the length of φ and the length of the period during which the drive unit 120 is continuously driven in the water supply period SP can be changed arbitrarily. In the first example, the control device 150 controls the driving unit 120 so that the length of the period from the time when the driving of the driving unit 120 is stopped in the middle of the water supply period SP to the end time of the water supply period SP becomes The length of the period during which the drive unit 120 is driven in the water supply period SP is substantially the same. In the second example, the control device 150 controls the driving unit 120 so that the length of the period from the time when the driving of the driving unit 120 is stopped in the middle of the water supply period SP to the end time of the water supply period SP becomes The length of the period during which the drive unit 120 is driven in the water supply period SP is shorter.

‧The relationship between the maximum rotation speed of the drive unit 120 during the water supply period SP and the maximum rotation speed of the drive unit 120 when the drive unit 120 is driven after the water supply period SP can be changed arbitrarily. In the first example, the control device 150 controls the drive unit 120 so that the maximum rotation speed of the drive unit 120 during the water supply period SP becomes equal to that of the drive unit 120 when the drive unit 120 is driven after the water supply period SP. The maximum rotation speed is essentially the same. In the second example, the control device 150 controls the driving unit 120 so that the maximum rotation speed of the driving unit 120 during the water supply period SP becomes substantially the same as the maximum rotation speed of the driving unit 120 during the washing period WP . In the third example, the control device 150 controls the drive unit 120 so that the maximum rotation speed of the drive unit 120 during the water supply period SP becomes higher than that of the drive unit 120 when the drive unit 120 is driven after the water supply period SP. The maximum rotation speed is higher. In the fourth example, the control device 150 controls the driving part 120 so that the maximum rotation speed of the driving part 120 during the water supply period SP becomes higher than that during the washing period. The maximum rotation speed of the driving part 120 in the WP during the cleaning period is higher.

‧The relationship between the output of the drive unit 120 during the water supply period SP and the output of the drive unit 120 when the drive unit 120 is driven after the water supply period SP can be changed arbitrarily. In the first example, the control device 150 controls the drive unit 120 so that the output of the drive unit 120 during the water supply period SP becomes substantially equal to the output of the drive unit 120 when the drive unit 120 is driven after the water supply period SP. Same as above. In the second example, the control device 150 controls the driving unit 120 so that the output of the driving unit 120 during the water supply period SP becomes substantially the same as the output of the driving unit 120 during the washing period WP. In the third example, the control device 150 controls the drive unit 120 so that the output of the drive unit 120 during the water supply period SP becomes higher than the output of the drive unit 120 when the drive unit 120 is driven after the water supply period SP. Big. In the fourth example, the control device 150 controls the driving unit 120 so that the output of the driving unit 120 during the water supply period SP becomes greater than the output of the driving unit 120 during the washing period WP.

‧The relationship between the driving state of the circulating pump 90 and the driving state of the driving unit 120 in the water supply period SP can be changed arbitrarily. In one example, during the water supply period SP, the control device 150 drives the driving unit 120 in a state where the circulation pump 90 is stopped.

‧The driving state of the driving part 120 in the SP during the water supply period can be changed arbitrarily. In the first example, the control device 150 controls the driving unit 120 so that the driving unit 120 continues to drive during the water supply period SP. In the second example, the control device 150 controls the driving unit 120 so that the driving unit 120 maintains a stopped state during the water supply period SP.

‧The period during which the circulating pump 90 is stopped during the washing period WP can be changed arbitrarily. In the first example, the control device 150 stops the circulation pump 90 in the first half period including the start time of the washing period WP. In the second example, the control device 150 stops the circulation pump 90 in the middle of the washing period WP.

‧The relationship between the period during which the circulation pump 90 is driven and the period during which the circulation pump 90 is stopped in the washing period WP can be changed arbitrarily. In the first example, the control device 150 controls the circulation pump 90 during the washing period WP so that the period during which the circulation pump 90 is driven becomes substantially the same as the period during which the circulation pump 90 is stopped. In the second example, the control device 150 controls the circulation pump 90 during the washing period WP so that the period during which the circulation pump 90 is driven becomes shorter than the period during which the circulation pump 90 is stopped.

‧The relationship between the period during which the circulating pump 90 is stopped in the long-time stroke and the period during which the circulating pump 90 is stopped in the short-time stroke can be changed arbitrarily. In the first example, the control device 150 controls the circulation pump 90 so that the period during which the circulation pump 90 is stopped in the long-time stroke becomes substantially the same as the period during which the circulation pump 90 is stopped in the short-time stroke. In the second example, the control device 150 controls the circulation pump 90 so that the period during which the circulation pump 90 is stopped in the long-time stroke becomes shorter than the period during which the circulation pump 90 is stopped in the short-time stroke.

‧The relationship between the period during which the circulating pump 90 is stopped and the length of the long stroke in the washing period WP can be changed arbitrarily. In the first example, the control device 150 controls the circulating pump 90 during the long-term stroke so that the period during which the circulating pump 90 is stopped in the washing period WP becomes substantially the same. same. In the second example, the control device 150 controls the circulating pump 90 so that as the length of the long-term stroke becomes longer, the period during which the circulating pump 90 is stopped in the washing period WP also becomes shorter.

‧The relationship between the driving time of the circulating pump 90 in the second half of the period of intermittent driving of the circulating pump 90 and the driving time of the circulating pump 90 in the first half of the period of intermittent driving of the circulating pump 90 can be changed arbitrarily. In the first example, the control device 150 controls the circulating pump 90 so that the driving time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven becomes the same as the first half of the period in which the circulating pump 90 is intermittently driven The driving time of the circulation pump 90 during this period is substantially the same. In the second example, the control device 150 controls the circulating pump 90 so that the driving time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven becomes longer than the first half of the period in which the circulating pump 90 is intermittently driven During the period, the driving time of the circulating pump 90 is longer. In the relationship between the driving time of the circulating pump 90 in the second half of the period during which the circulating pump 90 is intermittently driven, and the stopping time of the circulating pump 90 in the first half of the period in which the circulating pump 90 is intermittently driven, the same deformation The case will also be established.

‧The relationship between the driving time of the circulating pump 90 at the end of the intermittent driving period of the circulating pump 90 and the driving time of the circulating pump 90 in the first half of the intermittent driving period of the circulating pump 90 can be changed arbitrarily. In the first example, the control device 150 controls the circulating pump 90 so that the driving time of the circulating pump 90 at the end of the period during which the circulating pump 90 is intermittently driven becomes the same as the first half of the period during which the circulating pump 90 is intermittently driven The driving time of the circulating pump 90 is substantially the same. In the second example, the control device 150 will control The circulating pump 90 is controlled so that the driving time of the circulating pump 90 at the end of the period in which the circulating pump 90 is intermittently driven becomes longer than the driving time of the circulating pump 90 in the first half of the period in which the circulating pump 90 is intermittently driven . In the relationship between the driving time of the circulating pump 90 at the end of the period during which the circulating pump 90 is intermittently driven and the stopping time of the circulating pump 90 in the first half of the period during which the circulating pump 90 is intermittently driven, the same modification is also applied Will be established.

‧The relationship between the stop time of the circulating pump 90 at the end of the intermittent driving period of the circulating pump 90 and the driving time of the circulating pump 90 at the end of the intermittent driving period of the circulating pump 90 can be changed arbitrarily. In the first example, the control device 150 controls the circulating pump 90 so that the stop time of the circulating pump 90 at the end of the period during which the circulating pump 90 is intermittently driven becomes the same as the last of the period during which the circulating pump 90 is intermittently driven. The driving time of the circulation pump 90 is substantially the same. In the second example, the control device 150 controls the circulating pump 90 so that the stop time of the circulating pump 90 at the end of the period during which the circulating pump 90 is intermittently driven becomes longer than the last cycle of the period during which the circulating pump 90 is intermittently driven The driving time of the pump 90 is shorter.

‧Whether the circulating pump 90 is driven intermittently during the washing period WP can be arbitrarily changed. In the first example, the control device 150 controls the circulating pump 90 in all washing strokes in the long-term stroke, so that the circulating pump 90 is driven intermittently. In the second example, the control device 150 controls the circulating pump 90 in a short time stroke so that the circulating pump 90 is driven intermittently. In the third example, the control device 150 controls the circulating pump 90 so that the circulating pump 90 is not intermittently driven.

‧ Whether the state of driving the circulation pump 90 and the state of stopping the circulation pump 90 is included in the washing period WP can be changed arbitrarily. On the 1st In an example, the control device 150 continuously drives the circulation pump 90 during the washing period WP. In the second example, the control device 150 maintains the state where the circulation pump 90 has been stopped during the washing period WP.

‧The relationship between the maximum rotation speed of the driving unit 120 in the second washing period WP2 and the maximum rotation speed of the driving unit 120 in the first washing period WP1 can be changed arbitrarily. In the first example, the control device 150 controls the driving unit 120 so that the maximum rotation speed of the driving unit 120 in the second washing period WP2 becomes substantially equal to the maximum rotation speed of the driving unit 120 in the first washing period WP1. Same as above. In the second example, the control device 150 controls the driving unit 120 so that the maximum rotation speed of the driving unit 120 in the second washing period WP2 becomes higher than the maximum rotation speed of the driving unit 120 in the first washing period WP1. high.

‧The relationship between the output of the driving unit 120 in the second washing period WP2 and the output of the driving unit 120 in the first washing period WP1 can be changed arbitrarily. In the first example, the control device 150 controls the driving unit 120 so that the output of the driving unit 120 in the second washing period WP2 becomes substantially the same as the output of the driving unit 120 in the first washing period WP1. In the second example, the control device 150 controls the driving unit 120 so that the output of the driving unit 120 in the second washing period WP2 becomes higher than the output of the driving unit 120 in the first washing period WP1.

‧The structure of the dryer 140 can be changed arbitrarily. In one example, the dryer 140 includes a heat pump instead of the heater 143. The washing machine 1 can adopt a form in which the dryer 140 and the drying path 130 are omitted.

‧The configuration of the adjustment structure 100 can be changed arbitrarily. In a In the example, the adjustment structure 100 includes another mechanism capable of adjusting the position of the impeller 91 instead of the circulating motor 92. An example of other mechanisms is a ball screw. The washing machine 1 can adopt a form in which the adjustment structure 100 is omitted.

‧The configuration of the circulating motor 92 can be changed arbitrarily. In one example, the circulating motor 92 is configured such that when the stator 92C does not generate electromagnetic force, the impeller 91 and the bottom surface 93A of the housing 93 do not contact. Therefore, when the stator 92C of the circulating motor 92 does not generate electromagnetic force, a gap is formed between the impeller 91 and the bottom surface 93A.

‧The structure of the locking part 74 can be changed arbitrarily. In the first example, the blocking portion 74 is provided on the upstream side of the circulation pump 90 in the circulation path 70. In the second example, the blocking portion 74 includes a solenoid valve instead of the drain bend 74A. The washing machine 1 can adopt a form in which the lock portion 74 is omitted.

‧The structure of the filter 73 can be changed arbitrarily. In the first example, the filter 73 includes at least one hole in addition to the connecting hole 73C, or includes at least one hole instead of the connecting hole 73C. It is desirable that at least one hole is formed so that coins cannot pass through, and trash separated from clothes during washing can pass through. In the second example, at least one of the first hole 73A, the second hole 73B, and the connecting hole 73C is omitted from the filter 73.

‧The composition of the circulation path 70 can be changed arbitrarily. In one example, the circulation path 70 is connected to the upper opening 24 and the lower opening 25 without passing through the detergent box 40 and the water supply hose 60. According to this example, the second circulation path 72 connects the casing 93 of the circulation pump 90 and the outer tank 20.

‧The position of the upper opening 24 in the outer tank 20 can be changed arbitrarily. In the first example, the upper opening 24 is provided near the outer tank 20 The front part of the washing machine 1. In the second example, the upper opening 24 is provided in the portion near the center of the washing machine 1 in the outer tub 20. In the third example, the upper opening 24 is provided on the outer peripheral surface of the outer tank 20.

‧The position of the lower opening 25 in the outer tank 20 can be changed arbitrarily. In the first example, the lower opening 25 is provided in the portion of the outer tub 20 near the back of the washing machine 1. In the second example, the lower opening 25 is provided in the portion near the center of the washing machine 1 in the outer tank 20. In the third example, the lower opening 25 is provided on the outer peripheral surface of the outer tank 20.

‧The position of the drain opening 26 in the outer tank 20 can be changed arbitrarily. In the first example, the drain opening 26 is provided in the portion of the outer tub 20 close to the front of the washing machine 1. In the second example, the drain opening 26 is provided in the portion near the center of the washing machine 1 in the outer tub 20. In the third example, the drain opening 26 is provided on the outer peripheral surface of the outer tank 20.

‧The relationship between the distance between the upper opening 24 and the lower opening 25 and the distance between the upper opening 24 and the drain opening 26 can be arbitrarily changed. In the first example, the distance between the upper opening 24 and the lower opening 25 and the distance between the upper opening 24 and the drain opening 26 are substantially the same. In the second example, the distance between the upper opening 24 and the lower opening 25 is shorter than the distance between the upper opening 24 and the drain opening 26.

‧The relationship between the area of the lower opening 25 and the area of the drainage opening 26 can be arbitrarily changed. In the first example, the area of the lower opening 25 and the area of the drain opening 26 are substantially the same. In the second example, the area of the lower opening 25 is larger than the area of the drain opening 26.

‧Washing machine 1 can be used without circulating pump 90 and pulsation The form of at least one of the devices 110. In the washing machine 1, when the circulation pump 90 is omitted, the circulation path 70 can also be omitted. When the washing machine 1 omits the pulsator 110, the inner tank 30 is rotated relative to the outer tank 20 with the driving of the driving unit 120, thereby stirring the water in the inner tank 30.

‧The structure of the washing machine 1 can be changed arbitrarily. In one example, the washing machine 1 is a drum-type washing machine. The configuration of the drum-type washing machine is substantially the same as the configuration of the washing machine 1.

As described above, the washing machine in the first disclosure includes: an outer tank; an inner tank, which is provided in the outer tank in a manner communicating with the outer tank; and a circulation path, which is connected to the outer tank in a manner that can circulate the water in the outer tank groove. In addition, it is provided with: a circulation pump, which forms a flow of water in the circulation path; a driving part, which is driven by stirring the water in the inner tank; and a control device, which controls the circulation pump and the driving part. In addition, the control device drives the circulating pump and the driving unit during the water supply period, which is the period from when the water supply source starts to supply water to the inner tank until the water level of the inner tank reaches the washing water level.

The foam is generated by the driving of the circulating pump, and the water in the interior is stirred by the driving of the driving part, thereby reducing the deviation of the foam distribution, and the dirt removal on the clothes in the inner tank will be changed. It is not easy to produce unevenness.

The washing machine in the second disclosure is in the first disclosure, and the control device may drive the driving part while driving the circulating pump during the water supply period.

Since the state where the water is circulated by the circulating pump and the state where the water is stirred by the driving part are formed together, the foam will be efficiently removed generate.

The washing machine in the third disclosure is in the first disclosure, and the control device may start the driving of the circulating pump and the driving part after the start time of the water supply period.

As the water level in the inner tank is low, the circulation pump and the driving part will not be driven, so the possibility of damage to the clothes due to contact with the stirring member will be reduced. The stirring member includes the actuation of the driving part. The pulsator.

The washing machine in the fourth disclosure is in the second disclosure, and the control device may start the driving of the circulating pump and the driving part after the start time of the water supply period.

Since the foam is efficiently generated, and the circulation pump and the driving part will not be driven when the water level in the inner tank is low, so there is less concern about damaging the clothes due to contact with the stirring member. The stirring member includes A pulsator that operates by driving the drive unit.

The washing machine in the fifth disclosure is in any one of the first disclosure to the fourth disclosure, and the control device may stop the driving of the circulation pump and the driving part in the middle of the water supply period.

Since the circulation pump and the driving part have stopped, it will be in a state where it is difficult to generate bubbles in the outer tank and the inner tank. Therefore, the suspicion of foam overflowing from the outer tank will be reduced.

In the washing machine in the sixth disclosure, in the fifth disclosure, the control device may also control the driving part so that the period from the time when the driving of the driving part is stopped in the middle of the water supply period to the end time of the water supply period The length becomes longer than the length of the period during which the drive unit is driven in the water supply period.

Since the period during which the circulation pump and the driving part are stopped becomes longer, it will be in a state where bubbles are not easily generated in the outer tank and the inner tank for a long time. Therefore, the suspicion of foam overflowing from the outer tank will be reduced.

The washing machine in the seventh disclosure is in the first disclosure, and the control device may also control the driving part so that the output of the driving part during the water supply period becomes higher than the output of the driving part when the driving part is driven after the water supply period. small.

By reducing the output of the drive part during the water supply period when the water level in the inner tank is lower than that after the water supply period, the fear of damaging the clothes due to contact with the stirring member is reduced. The stirring member includes the drive A pulsator that is driven and operated.

The washing machine in the eighth disclosure is in the seventh disclosure. The control device can also control the driving part so that the maximum rotation speed of the driving part during the water supply period becomes higher than that of the driving part when the driving part is driven after the water supply period. The maximum rotation speed is lower.

By reducing the maximum rotation speed of the driving part during the water supply period when the water level in the inner tank is lower than that after the water supply period, the concern of damaging the clothes due to contact with the stirring member will be reduced. The stirring member includes A pulsator that drives and operates the drive unit.

The washing machine in the ninth disclosure is in the seventh or the eighth disclosure, and the water supply period may be followed by the washing period for washing the clothes in the inner tub.

In the washing period after the water supply period, by making the output of the drive unit larger than the output during the water supply period, sufficient washing performance can be expected.

The washing machine and its control device related to the present invention can be used in various washing machines including household and business use.

1: washing machine

10: body

11, 21, 31: shell

11A, 21A, 31A: top surface

11B: Inclined surface

12: The first opening

13: body cover

14: Operation Department

15: Display

20: Outer tank

21B, 31D: bottom

22: second opening

23: Outer tank cover

24: Upper opening

25: Lower opening

26: Drain opening

30: inner slot

31B: containment space

31C: Outer peripheral surface

32: The third opening

33: Connecting hole

40: detergent box

50: water supply pipe

60: water supply hose

61: Water supply port

70: Loop Road

71: First Circulation Road

72: 2nd Circulation Road

74: Locking part

74A: Drain bend

75: Circulating drainage

76: 2nd drain valve

80: Drainage way

81: The first drain valve

90: Circulating pump

91: impeller

92: Circulation motor

93: Shell

93A: bottom surface

110: pulsator

111: blade

112: base

120: Drive

121: Washing motor

130: Dry Road

140: Dryer

150: control device

Claims (9)

A washing machine is provided with: an outer tank; an inner tank arranged in the outer tank to communicate with the inside of the outer tank; a circulation path connected to the outer tank in a manner capable of circulating water in the outer tank; a circulation pump, The flow of water is formed in the circulation path; the drive part is used to stir the water in the inner tank to drive; and the control device controls the circulation pump and the drive part, and the control device drives the circulation during the water supply period The pump and the drive unit. The water supply period is from the water supply source to the inner tank until the water level of the inner tank reaches the washing water level. The control device controls the drive unit so that during the water supply period The output of the drive unit becomes smaller than the output of the drive unit when the drive unit is driven after the water supply period. Such as the washing machine of claim 1, wherein the control device drives the driving part while driving the circulating pump during the water supply period. Such as the washing machine of claim 1, wherein the control device starts driving the circulation pump and the driving part after the start time point of the water supply period. Such as the washing machine of claim 2, wherein the aforementioned control device will start the aforementioned circulation pump and after the start time point of the aforementioned water supply period Drive of the aforementioned drive unit. Such as the washing machine of any one of claims 1 to 4, wherein the control device stops the driving of the circulation pump and the driving part in the middle of the water supply period. Such as the washing machine of claim 5, wherein the control device controls the driving part so that the length of the period from the time when the driving of the driving part is stopped in the middle of the water supply period to the end time of the water supply period, It becomes longer than the length of the period during which the said drive part is driven in the said water supply period. Such as the washing machine of claim 1, wherein the control device controls the drive unit so that the maximum rotation speed of the drive unit during the water supply period becomes higher than that when the drive unit is driven after the water supply period The maximum rotation speed is lower. Such as the washing machine of claim 1 or 7, wherein the water supply period is followed by a washing period for washing the clothes in the inner tank. A control device is the control device of a washing machine as claimed in any one of claims 1 to 8.

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