WO2019128900A1

WO2019128900A1 - Washing machine

Info

Publication number: WO2019128900A1
Application number: PCT/CN2018/122978
Authority: WO
Inventors: 铃木肇; 山内智博
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社
Priority date: 2017-12-26
Filing date: 2018-12-24
Publication date: 2019-07-04
Also published as: JP7097546B2; JP2019111253A

Abstract

A washing machine, which is capable of washing a large amount of laundry well. A fully automatic washing machine (1), which is provided with: an outer barrel (20) that is elastically supported within a box body (10); a washing and water removing barrel (24) that is configured within the outer barrel (20); a circulating pump (62) that is configured within the box body (10) and that draws water stored in the outer barrel (20); and a spray head (61) that is provided with a nozzle (105) facing the interior of the washing and water remoing barrel (24), which sprays the water drawn by the circulating pump (62) from the nozzle (105) toward the lower washing and water removing barrel (24); a plurality of nozzles (105) is provided according to a manner of a specific interval arrangement on a surface of the nozzle (61) that faces the interior of the washing and water removing barrel (24).

Description

washing machine

Technical field

The present invention relates to a washing machine.

Background technique

Conventionally, there has been known a washing machine which draws water stored in the bottom of the outer tub with a circulation pump and sprays the extracted water from above the washing and dewatering tub toward the washing and dewatering tub. For example, Patent Document 1 describes a washing machine including a water passage portion having a large return port, and sprays the washing water drawn by the circulation pump from the return port to the inner tub, that is, the washing and dewatering tub.

The purpose of the washing machine of Patent Document 1 is to spray the washing water over a large area so as to saturate the laundry well, so that the strength of the sprayed washing water is not taken into consideration, and the washing water is discharged from the return port in a state of almost free fall to contact with the laundry. . Therefore, it is almost impossible to expect to wash the laundry by the force applied when the washing water comes into contact with the laundry. Therefore, in the case where a large amount of laundry is put into the washing and dewatering tub, it is difficult to wash the upper laundry well by the sprayed washing water.

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2015-217181

Summary of the invention

Problems to be solved by the invention

The present invention is an invention for solving such a problem, and an object thereof is to provide a washing machine capable of washing a large amount of laundry well.

Solution to solve the problem

A washing machine according to a main aspect of the present invention includes: an outer tub elastically supported in the casing; a washing dewatering bucket disposed in the outer tub; and a pump disposed in the casing to extract water stored in the outer tub And a spray head having a nozzle facing the washing and dewatering tank, and spraying water drawn by the pump from the nozzle toward the lower washing dewatering tank.

According to the above configuration, the water ejected from the nozzle of the head is in contact with the laundry on the upper side in the washing and dewatering tub, so that the washing on the upper side can be washed by the impact of the contacted water. Thereby, even when a large amount of laundry is put into the washing and dewatering tub, the cleaning unevenness between the laundry on the upper side and the laundry in the lower side in the washing and dewatering tub can be reduced, and the washing can be improved. Wash the laundry.

In the washing machine of the present aspect, a structure may be adopted, that is, a pulsator disposed at a bottom portion of the washing and dewatering tub, a driving portion for driving the pulsator, and a control portion, the shower head The water is sprayed from the nozzle to a partial area of the washing and dewatering tub that is offset from the central axis. In this case, when the water is supplied into the outer tub during the washing process, the control unit rotates the pulsator by the driving unit while the pump is operating.

According to the above configuration, in the case where a large amount of laundry is put into the washing and dewatering tub, the laundry in the partial area is largely sunk due to the pressure of the water sprayed from the nozzle, etc., and is easily generated between the laundry in other areas. High imbalance. Moreover, when the pulsator is rotated in this state, the laundry in other areas is liable to move to a lower local area. Thereby, from the time point of water supply to the outer tub, the laundry is easily moved in the above-described manner, and it is easy to generate mechanical force such as friction between the laundry. Therefore, it is possible to wash a large amount of laundry well from the time point of supplying water into the outer tub.

In the washing machine of the present aspect, a plurality of the nozzles are disposed on the surface facing the washing and dewatering tub at a predetermined interval.

According to the above configuration, even if the laundry comes into contact with a part of the nozzle to block the ejection opening thereof, the water which is increased in pressure and the water potential is enhanced is ejected from the other nozzles. Therefore, since the number of nozzles for water spray is reduced by the increase of the water potential, the effect of washing the upper laundry is not easily lowered.

In the washing machine of the present aspect, an inlet for introducing water from the pump can be provided on the inner peripheral surface side of the washing and dewatering tub than the nozzle. In this case, the injection port of the water in the nozzle faces a direction inclined to the opposite side of the inner peripheral surface side with respect to the immediately below the head.

When the head is provided with a structure for introducing an inlet port for introducing water from the pump closer to the inner peripheral surface side of the washing and dewatering tub than the nozzle, water in the nozzle is opposite to the nozzle and the inlet in the nozzle. The side wall contacts and folds back toward the water flow of the injection port, so that the water sprayed from the injection port is easily directed toward the inner peripheral surface side of the washing and dewatering tub.

According to the above configuration, the injection port is directed in a direction inclined to the opposite side of the inner peripheral surface side from the immediately below the head, so that water can be sprayed from the injection port to the substantially right lower position of the head. Thereby, it is possible to prevent water sprayed from being sprayed from the nozzle so as to be in contact with the laundry on the inner peripheral surface side of the washing and dewatering tub.

In the washing machine of the present aspect, a configuration may be adopted in which a filter case is provided through which water sucked by the pump passes, and a filter is housed in the filter case.

According to the above configuration, the lint, dirt, and the like which are mixed in the water from the laundry are collected by the filter, so that it is possible to prevent the thread from entering the inside of the pump or the head.

In the case of employing the above configuration, a configuration may be employed in which the pump includes a pump casing, an impeller disposed in the pump casing, and a motor for rotating the impeller. In this case, the outflow port of the water in the filter case faces the suction port of the water in the pump casing, and a connection pipe is connected between the outflow port and the suction port.

According to this configuration, since the connecting pipe can be arranged in a straight line, the pressure loss in the connecting pipe can be suppressed, and the water in the outer tub can be satisfactorily pumped by the pump.

Effect of the invention

According to the present invention, it is possible to provide a washing machine which can wash a large amount of laundry well.

The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiments are merely illustrative of the present invention, and the present invention is not limited by the contents described in the following embodiments.

DRAWINGS

1 is a side cross-sectional view of a fully automatic washing machine of an embodiment.

2 is a plan view of a fully automatic washing machine in which an upper panel, an upper cover, an outer tub cover, an outer tub cover, and a boom are omitted in the embodiment.

(a) and (b) of FIG. 3 are a plan view and a bottom view, respectively, of the head of the embodiment, and (c) of FIG. 3 is a side cross-sectional view of the head in the state of being attached to the outer tub cover of the embodiment.

4 is a side cross-sectional view showing a main part of a fully automatic washing machine in a position of a circulation pump and a filter unit according to an embodiment.

Fig. 5 is a block diagram showing the configuration of a fully automatic washing machine according to an embodiment.

Fig. 6 is a flow chart showing the control operation in the cleaning process of the embodiment.

(a) to (e) of FIG. 7 are schematic views for explaining the movement of the laundry at the time of water supply in the case where a large amount of laundry of the embodiment is put into the washing and dewatering tub.

Description of the reference numerals

1: fully automatic washing machine (washing machine); 10: box; 20: outer tub; 24: washing dewatering bucket; 26: pulsator; 30: drive unit (drive unit); 61: nozzle; 62: circulation pump (pump) ; 63: filter unit; 65: second connecting pipe (connecting pipe); 104: inlet port; 105: nozzle; 106: injection port; 210: pump casing; 211: suction port; 220: impeller; ; 310: filter; 320: filter housing; 326: outflow port.

Detailed ways

Hereinafter, a fully automatic washing machine 1 according to an embodiment of the washing machine of the present invention will be described with reference to the drawings.

FIG. 1 is a side cross-sectional view of the fully automatic washing machine 1 of the present embodiment. 2 is a plan view of the fully automatic washing machine 1 in which the upper panel 12, the upper cover 15, the outer tub cover 20b, the outer tub lid 23, and the boom 21 are omitted in the present embodiment.

The fully automatic washing machine 1 is provided with the casing 10 which has an external appearance. The casing 10 includes a bottomed rectangular tubular body portion 11 having an open upper surface, and an upper panel 12 covering the upper surface of the body portion 11. On the outer bottom surface of the casing 10, legs 13 are provided at the four corners. An outer insertion port 14 for feeding the laundry is formed in the upper panel 12. The outer insertion port 14 is covered by a freely open upper cover 15.

In the casing 10, the outer tub 20 is elastically suspended and supported by four booms 21 having anti-vibration means. The outer tub 20 includes a substantially cylindrical outer tub main body 20a whose upper surface is open, and an outer tub cover 20b that constitutes an upper surface of the outer tub 20 by covering the upper surface of the outer tub main body 20a. The outer tub 20b, which is the upper surface of the outer tub 20, has an inner insertion opening 22 for receiving laundry at a position corresponding to the outer insertion opening 14. The inner insertion opening 22 is covered by the outer tub cover 23 so as to be openable and closable.

In the outer tub 20, a substantially cylindrical washing and dewatering tub 24 having an open upper surface is disposed. A plurality of dewatering holes 24a are formed on the inner circumferential surface of the washing and dewatering tub 24 over the entire circumference. A balance ring 25 is provided at an upper portion of the washing and dewatering tub 24.

A pulsator 26 is disposed at the bottom of the outer tub 20. A plurality of blades 26a radially extending from the center are formed on the surface of the pulsator 26. Further, a plurality of water-spreading blades 26b radially extending from the center are formed on the back surface of the pulsator 26. These water-spreading blades 26b are disposed in a pump chamber 27 formed between the back surface of the pulsator 26 and the bottom surface of the washing and dewatering tub 24.

A circulation water passage 28 extending in the vertical direction is disposed on the inner circumferential surface of the washing and dewatering tub 24. The lower end portion of the circulating water passage 28 is connected to the pump chamber 27. A slit-shaped discharge port 28a is formed in an upper portion of the circulation water passage 28. Further, a coil filter 29 is provided in the circulating water passage 28. By the rotation of the water lift blade 26b, the water in the pump chamber 27 is sent to the circulating water passage 28, and is discharged from the discharge port 28a toward the inside of the washing and dewatering tub 24. Thereby, the circulating water is poured onto the laundry on the upper side in the washing and dewatering tub 24. Further, the circulating water is returned to the washing and dewatering tank 24 via the chip filter 29, so that the lint, dirt, and the like contained in the circulating water are trapped by the wire filter 29.

A drive unit 30 that generates a torque that drives the washing and dewatering tub 24 and the pulsator 26 is disposed at the outer bottom of the outer tub 20. The drive unit 30 includes a drive motor 31, a transmission mechanism portion 32, a wing shaft 33, and a dewatering drum shaft 34. The wing shaft 33 is coupled to the pulsator 26, and the dewatering drum shaft 34 is coupled to the washing and dewatering tub 24. The transmission mechanism portion 32 has a clutch mechanism 32a. By the switching operation of the clutch mechanism 32a, the torque of the drive motor 31 is transmitted only to the wing shaft 33 during the cleaning process and the rinsing process, and only the pulsator 26 is rotated and dehydrated. In the process, the torque of the drive motor 31 is transmitted to the wing shaft 33 and the dewatering drum shaft 34 to integrally rotate the pulsator 26 and the washing and dewatering tub 24. It should be noted that the drive unit 30 corresponds to the drive unit of the present invention.

A cylindrical drain port portion 20c is formed at the outer bottom of the outer tub 20. A drain valve 40 is provided in the drain port portion 20c. The drain valve 40 is connected to the drain hose 41. When the drain valve 40 is opened, the water stored in the washing and dewatering tub 24 and the tub 20 is discharged to the outside of the machine through the drain hose 41.

A water supply unit 50 for supplying tap water into the washing and dewatering tub 24 is provided above the rear portion of the outer tub 20. The water supply unit 50 includes a water supply valve 51, a detergent box 52, and a water supply nozzle 53. The water supply valve 51 is disposed at a rear portion of the upper panel 12, and is connected to a water supply hose (not shown) that extends from the faucet. A detergent is put into the detergent box 52. The tip end portion of the water supply nozzle 53 passes through the outer tub cover 20b, and the water supply port 54 faces the inside of the washing and dewatering tub 24. When the water supply valve 51 is opened, tap water is introduced from the faucet into the water supply unit 50. The introduced tap water passes through the detergent box 52 and the water supply nozzle 53, and flows out from the water supply port 54 into the washing and dewatering tub 24. At the time of the washing process, the detergent is put into the detergent box 52, and thus the detergent water which is mixed with the detergent is supplied into the washing and dewatering tub 24.

In the present embodiment, the fully automatic washing machine 1 is provided with a water spray device 60. The water spray device 60 includes a head 61, a circulation pump 62, a filter unit 63, a first connection pipe 64, a second connection pipe 65, and a third connection pipe 66. The circulation pump 62 corresponds to the pump of the present invention. Further, the second connecting pipe 65 corresponds to the connecting pipe of the present invention.

The head 61 is disposed above the washing and dewatering tub 24 and disposed at a position deviated rearward from the central axis C of the washing and dewatering tub 24 . The circulation pump 62 is disposed in the rear portion of the lower portion of the casing 10 so as to be close to the right side surface of the casing 10. The filter unit 63 is disposed in front of the lower portion of the lower portion of the casing 10 so as to be close to the right side surface of the casing 10. A first connecting pipe 64 is disposed between the head 61 and the circulation pump 62, and a second connecting pipe 65 is disposed between the circulation pump 62 and the filter unit 63, and a gap is disposed between the filter unit 63 and the outer tub 20. Three connecting tubes 66. It should be noted that the circulation pump 62 and the filter unit 63 can also be disposed close to the left side surface of the casing 10.

(a) and (b) of FIG. 3 are a plan view and a bottom view of the head 61 of the present embodiment, respectively, and (c) of FIG. 3 is a side cross-sectional view of the head 61 in a state of being attached to the outer tub cover 20b of the present embodiment. It should be noted that in (c) of FIG. 3, the head 61 and the outer tub cover 20b are cut at different positions in the left-right direction.

The head 61 has a shape that is long in the left-right direction and flat in the up-and-down direction, and is composed of an upper member 101 whose lower surface is open and a lower member 102 whose upper surface is open. The upper member 101 and the lower member 102 are formed of, for example, a resin material and joined in the up and down direction, and are fixed by a plurality of screws 103. It should be noted that the upper member 101 and the lower member 102 may be joined by a joining method such as heat welding.

A circular tubular introduction port 104 extending upward is provided at the right rear portion of the head 61. The water discharged from the circulation pump 62 is introduced into the head 61 from the introduction port 104. Further, a plurality of nozzles 105 projecting in a spherical shape are provided on the bottom surface of the head 61. The plurality of nozzles 105 are arranged at a predetermined interval in the left-right direction as the longitudinal direction of the head 61. In each of the nozzles 105, a long slit-shaped injection port 106 is formed in the left-right direction, that is, the direction in which the nozzles 105 are arranged. The injection port 106 is inclined obliquely forward in the front-rear direction toward the front side opposite to the introduction port 104 side with respect to the immediately below the head 61.

The front end portion of the introduction port 104 is connected to the water injection port 20d provided in the outer tub cover 20b so that the left-right direction of the head 61 is the left-right direction of the casing 10. The zero inlet 107 is sealed between the inlet 104 and the water inlet 20d. In a state where the head 61 is attached to the outer tub cover 20b, the introduction port 104 is located closer to the inner peripheral surface side of the washing and dewatering tub 24 than the nozzle 105 in the front-rear direction. Further, the nozzle 105 faces the inside of the washing and dewatering tub 24.

4 is a side cross-sectional view showing a main part of the fully automatic washing machine 1 taken along the position of the circulation pump 62 and the filter unit 63 of the present embodiment.

The circulation pump 62 includes a pump housing 210, an impeller 220 disposed in the pump housing 210, and a motor 230 for rotating the impeller 220. A cylindrical suction port 211 that protrudes forward is provided at the center of the front end surface of the pump casing 210, and a cylindrical discharge port 212 that protrudes upward is provided on the circumferential surface. When the motor 230 is operated to rotate the impeller 220, water is sucked into the pump casing 210 through the suction port 211, and is discharged from the pump casing 210 through the discharge port 212.

The filter unit 63 includes a filter 310 and a filter housing 320 that houses the filter 310. The filter 310 is composed of a substantially cylindrical filter case 311 whose both end faces are closed, and a substantially disk-shaped cover 312 fixed to the front portion of the filter case 311. The filter box 311 has an opening 313 for ingesting water on the upper side. A plurality of water passing holes 314 are formed in the circumferential surface and the rear end surface of the filter case 311, and these water passing holes have a size in which the wire chips do not easily pass. A knob 315 is provided on the front surface of the cover 312.

The filter case 320 has a substantially cylindrical shape in which the rear end surface is closed, and the front end surface is opened as the insertion opening 321 of the filter 310. The front end portion of the filter case 320 is fitted to the opening portion 10a formed at the lower portion of the casing 10. The filter case 320 includes a cylindrical case accommodating portion 322, a cap accommodating portion 323 having an inner diameter slightly larger than the case accommodating portion 322, and a rectangular cylindrical door accommodating portion 324.

The filter case 311 is housed in the case accommodating portion 322. In the tank accommodating portion 322, a cylindrical inflow port 325 that protrudes upward is provided on the circumferential surface, and a cylindrical outflow port 326 that protrudes rearward is provided at the center of the rear end surface. The outflow port 326 is opposed to the suction port 211 of the circulation pump 62. The cover 312 is housed in the cover accommodating portion 323. In order to prevent water flowing through the tank accommodating portion 322 from leaking, the lid 312 and the lid accommodating portion 323 are sealed by a gasket 327.

A door 330 covering the insertion opening 321 is housed in the door housing portion 324. For example, the lower end portion of the door 330 is rotatably supported by the door accommodating portion 324, and is opened toward the front side. The user can open the door 330 and house the filter 310 from the insertion port 321 into the filter housing 320.

The first connecting pipe 64, the second connecting pipe 65, and the third connecting pipe 66 can be formed of a hose made of rubber or polyvinyl chloride or a resin pipe. One end of the first connecting pipe 64 is connected to the water injection port 20d of the outer tub cover 20b, and the other end is connected to the discharge port 212 of the pump casing 210. One end of the second connecting pipe 65 is connected to the suction port 211 of the pump casing 210, and the other end is connected to the outflow port 326 of the filter case 320. The second connecting pipe 65 linearly extends between the suction port 211 and the outflow port 326. One end of the third connecting pipe 66 is connected to the inflow port 325 of the filter case 320, and the other end is connected to the drain port portion 20c of the outer tub 20.

FIG. 5 is a block diagram showing the configuration of the fully automatic washing machine 1 of the present embodiment.

The automatic washing machine 1 includes a control unit 70, an operation unit 80, and a water level sensor 90 in addition to the above configuration. The control unit 70 includes a control unit 71, a storage unit 72, a motor drive unit 73, a clutch drive unit 74, a water supply drive unit 75, a pump drive unit 76, and a drain drive unit 77.

The operation unit 80 is provided, for example, at the front of the upper panel 12. The operation unit 80 is provided with various operation buttons such as a power button 81, a start button 82, and a mode selection button 83. The power button 81 is a button for turning on and off the power of the fully automatic washing machine 1. The start button 82 is a button for starting the operation. The mode selection button 83 is a button for selecting an arbitrary operation mode from among a plurality of operation modes of the washing operation. The operation unit 80 outputs an input signal corresponding to a button operated by the user among various buttons such as the power button 81, the start button 82, and the mode selection button 83 to the control unit 71. The water level sensor 90 detects the water level in the outer tub 20, and outputs a water level detection signal corresponding to the detected water level to the control unit 71.

The motor drive unit 73 drives the drive motor 31 based on a control signal from the control unit 71. The clutch drive unit 74 drives the clutch mechanism 32a based on a control signal output from the control unit 71.

The water supply drive unit 75 drives the water supply valve 51 based on a control signal from the control unit 71. The pump drive unit 76 drives the circulation pump 62 based on a control signal from the control unit 71. The drain drive unit 77 drives the drain valve 40 based on a control signal from the control unit 71.

The storage unit 72 includes an EEPROM, a RAM, and the like. The storage unit 72 stores a program for executing a washing operation in various operation modes. Further, the storage unit 72 stores various parameters and various control flags for executing these programs.

The control unit 71 controls the motor drive unit 73, the clutch drive unit 74, the water supply drive unit 75, the pump drive unit 76, and the drain according to a program stored in the storage unit 72 based on various signals from the operation unit 80, the water level sensor 90, and the like. Drive unit 77 and the like.

The fully automatic washing machine 1 performs a washing operation in various operation modes. In the washing operation, the washing process, the intermediate dehydration process, the rinsing process, and the final dehydration process are sequentially performed.

In the washing process and the rinsing process, the pulsator 26 is rotated to the right and to the left in a state where water is stored in the washing and dewatering tub 24. The laundry in the washing and dewatering tub 24 is washed or rinsed by the action of a water flow or the like generated by the rotation of the pulsator 26. In the washing process, the detergent supplied to the water in the washing and dewatering tub 24 is mixed with the detergent, so that the washing performance by the detergent is also exerted.

During the intermediate dewatering process and the final dewatering process, the washing and dewatering tub 24 and the pulsator 26 are integrally rotated at a high speed. The laundry is dehydrated by the action of centrifugal force generated in the washing dewatering bucket 24.

In the present embodiment, the circulation pump 62 is operated in a state in which the water in which the detergent is mixed is stored in the outer tub 20 at least during the cleaning process. The water in the outer tub 20 is drawn and supplied to the head 61. From the respective nozzles 105 of the head 61, as indicated by the alternate long and short dash line in Fig. 2, water is ejected toward a partial region in the washing and dewatering tub 24 which is displaced rearward from the central axis C. The sprayed water is stirred by the rotation of the pulsator 26, and comes into contact with the upper laundry moving toward the rear side in the washing and dewatering tub 24. The laundry is not only impregnated with the detergent contained in the water but also imparted mechanical force by the impact when it comes into contact with high-pressure water. Thereby, the laundry on the upper side which is not easily reached by the water flow generated by the pulsator 26 is washed.

Thus, the laundry on the upper side close to the water surface or exposed from the water surface can be well washed, so that a large amount of laundry can be put in until reaching above the washing dewatering tub 24, and the washing capacity can be increased without changing the size of the washing and dewatering tub 24. .

Further, the head 61 is provided with a plurality of nozzles 105 at a predetermined interval in the longitudinal direction thereof, so that even if the laundry contacts the partial nozzles 105 to block the ejection openings 106, the partial ejection openings 106 are blocked to increase the pressure accordingly. The water having enhanced water potential is also ejected from the ejection openings 106 of the other nozzles 105. Therefore, the number of nozzles 105 for water spray is reduced by the increase of the water potential, and the effect of washing the upper laundry is not easily lowered.

Further, since the ejection openings 106 of the respective nozzles 105 have a shape elongated in the direction in which the nozzles 105 are arranged, the sprayed water is superimposed in the arrangement direction and is easily brought into contact with the laundry, and the water is easily brought into contact with the laundry without any omission.

Further, in the head 61, the introduction port 104 is located behind each nozzle 105. Therefore, in the head 61, as indicated by the solid arrows in FIG. 3(c), in addition to the water flow from the inlet 104 directly toward the injection port 106 of each nozzle 105, a flow from the inlet 104 is generated. The water collides with the front side wall and folds back toward the water flow like the injection port 106. Therefore, in the case where the injection port 106 of each nozzle 105 faces directly downward, the water ejected from the injection port 106 is likely to face the later side immediately below according to the intensity of the folded water flow. In the present embodiment, since the injection port 106 of each nozzle 105 faces obliquely forward, water ejected from the injection port 106 is ejected toward a substantially right position of the nozzle 105.

Water discharged from the outer tub 20 and sucked into the circulation pump 62 flows through the filter housing 320. The lint and dirt from the laundry and mixed into the water are trapped by the filter 310. Thereby, it is possible to prevent the swarf from being caught on the impeller 220 of the circulation pump 62, or the swarf clogging the injection port 106 of each nozzle 105 of the head 61. Here, the second connecting pipe 65 is disposed linearly between the outflow port 326 of the filter case 320 and the suction port 211 of the pump casing 210. Therefore, the pressure loss in the second connecting pipe 65 can be suppressed.

Fig. 6 is a flowchart showing a control operation in the cleaning process of the embodiment.

When the washing process is started, the control portion 71 opens the water supply valve 51 (S1). Thereby, water is supplied from the water supply unit 50 to the inside of the tub 20. Water in which the detergent is mixed is stored in the outer tub 20. The control unit 71 monitors whether or not the water level in the outer tub 20 has reached the pump start water level based on the water level detection result of the water level sensor 90 (S2). When the water in the outer tub 20 is stored to the pump start water level, the water can be taken to the spray head 61 after the circulation pump 62 is started.

When the water level in the outer tub 20 reaches the pump start water level (S2: YES), the control unit 71 causes the circulation pump 62 to operate (S3). Then, when a predetermined time, for example, about 30 seconds has elapsed after the start of the operation of the circulation pump 62 (S4: YES), the control unit 71 alternately rotates the drive motor 31 to the right and left with a pause, so that the pulsator 26 is provided with Rotate alternately to the right and to the left (S5). For example, the ON time to the left and the right of the drive motor 31 can be set to about 2 seconds, and the stop time can be set to about 0.5 second. The turn-on time to the left and the turn-on time to the right may be set to different times without being set to the same time.

The control unit 71 monitors whether or not the water level in the outer tub 20 has reached the washing water level set according to the load amount of the laundry (S6). When the water level in the outer tub 20 reaches the washing water level (S6: YES), the control unit 71 closes the water supply valve 51 (S7). The water supply in the outer tub 20 by the water supply unit 50 is stopped. The circulation pump 62 and the pulsator 26 continue to operate.

The control unit 71 monitors whether or not a predetermined washing time has elapsed after the water level in the outer tub 20 reaches the washing water level (S8). When the cleaning time has elapsed (S8: YES), the control unit 71 stops the circulation pump 62, stops the drive motor 31, and stops the pulsator 26 (S9). Thereafter, the control unit 71 opens the drain valve 40 (S10). The water is discharged from the outer tub 20 and the washing process is completed.

(a) to (e) of FIG. 7 are schematic views for explaining the movement of the laundry at the time of water supply in the case where a large amount of laundry of the present embodiment is put into the washing and dewatering tub 24.

In the fully automatic washing machine 1 of the present embodiment, as shown in FIG. 7(a), the laundry is put into a position in the washing and dewatering tub 24 that is slightly lower than the head 61. When the water supply from the water supply unit 50 is started, the water mixed with the detergent is stored in the outer tub 20.

As shown in (b) of FIG. 7, when the outer tub 20 stores water to the pump start water level, the circulation pump 62 operates to spray water from the respective nozzles 105 of the head 61, and the sprayed water and the washing dehydration located below the head 61 The laundry on the back side of the tub 24 is in contact. On the rear side of the washing and dewatering tub 24, the laundry is largely sunk by being wetted by water and pushed by the water potential, and a significant height difference of the laundry is generated between the rear side and the front side of the washing and dewatering tub 24.

In this state, as shown in FIG. 7(c), when the pulsator 26 starts to rotate in the left-right direction, the height balance is poor, and therefore the laundry on the front side moves to the lower portion of the rear side. On the front side of the washing and dewatering tub 24, the laundry on the upper side is not easily stirred by the pulsator 26, so that it is not easy to move at a large extent. However, since these laundry materials have not been wetted by water and are light in weight, as indicated by a broken line arrow, on the lower side of the washing and dewatering tub 24, when the laundry is stirred by the pulsator 26 and moved from the front side to the rear side, it is easy to be The laundry on the lower side is jacked up.

As shown in (d) of FIG. 7, on the rear side of the washing and dewatering tub 24, the laundry sinks due to the sprayed water, and is generated between the laundry on the upper side which is lifted on the front side of the washing and dewatering tub 24. Significant height difference. Thereby, the laundry on the front side moves to the lower portion of the rear side.

By repeating the operations of (c) and (d) of FIG. 7 , as shown in FIG. 7( e ), during the water supply to the outer tub 20 , the laundry is easily moved in the above-described manner. Thereby, it is easy to generate mechanical force such as friction between the laundry on the laundry. Therefore, it is possible to wash a large amount of laundry well from the time point of supplying water into the outer tub 20.

As described above, according to the present embodiment, the water sprayed from the respective nozzles 105 of the head 61 comes into contact with the upper laundry in the washing and dewatering tub 24, so that the upper laundry can be washed by the impact of the contacted water. Thereby, even when a large amount of laundry is put into the washing and dewatering tub 24, the cleaning unevenness of the laundry on the upper side and the laundry in the lower side in the washing and dewatering tub 24 can be reduced, which is good. Wash the laundry.

Further, according to the present embodiment, it is provided that when the water is supplied into the outer tub 20, the pulsator 26 is rotated while the respective nozzles 105 of the head 61 are sprayed toward the rear side in the washing and dewatering tub 24, and thus a large amount of laundry is washed. When it is put into the washing and dewatering tub 24, the laundry on the rear side is largely sunk by the pressure of the water sprayed from each of the nozzles 105, and the height is unbalanced with the laundry on the front side. Moreover, when the pulsator 26 is rotated in this state, the laundry on the front side is easily moved to the rear side in the washing and dewatering tub 24. Thereby, from the time point of supplying water into the outer tub 20, the laundry is easily moved in the above-described manner, and it is easy to generate mechanical force such as friction between the laundry. Therefore, it is possible to wash a large amount of laundry well from the time point of supplying water into the outer tub 20.

Further, according to the present embodiment, the head 61 is provided with a plurality of nozzles 105 at predetermined intervals in the longitudinal direction. Therefore, even if the laundry contacts the partial nozzles 105 and blocks the ejection openings 106, the number of nozzles 105 for water spray is increased. The reduction is also compensated by the increase in the water potential of the remaining nozzles 105, and the effect of washing the upper side laundry is not easily lowered.

Further, according to the present embodiment, in the head 61, the injection port 106 of each nozzle 105 faces obliquely forward with respect to the introduction port 104 at the rear of each nozzle 105. Therefore, even if the water from the inlet port 104 collides with the front side wall and is folded back and flows toward the injection port 106, the water can be sprayed from the injection port 106 to the substantially right position of the head 61. Therefore, it is possible to prevent the water sprayed from being ejected from the respective nozzles 105 so as to be in contact with the laundry so as to be in contact with the inner peripheral surface side of the washing dewatering tub 24 at the rear.

Further, according to the present embodiment, the lint, dirt, and the like which are taken out from the laundry and mixed in the water are collected by the filter 310, so that it is possible to prevent the lint or the like from entering the inside of the pump casing 210 of the circulation pump 62 and the nozzle 61, and preventing the lint. The impeller 220 is entangled, or the swarf or the like blocks the ejection opening 106 of each nozzle 105 of the head 61.

Further, according to the present embodiment, the filter unit 63 and the circulation pump 62 are disposed in the casing 10 such that the outflow port 326 of the filter case 320 faces the suction port 211 of the pump casing 210, and is in the flow. The second connecting pipe 65 is connected between the outlet 326 and the suction port 211, so that the second connecting pipe 65 can be arranged to extend linearly. Thereby, the pressure loss in the second connecting pipe 65 can be suppressed, and the water in the outer tub 20 can be satisfactorily captured by the circulation pump 62.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and the like, and various modifications other than the above may be made in the embodiments of the present invention.

For example, in the above embodiment, the water spray device 60 is provided with a filter unit 63. However, the filter unit 63 may not be provided in the water spray device 60. In this case, the second connecting pipe 65 connects the suction port 211 of the pump casing 210 and the drain port portion 20c of the outer tub 20. In addition, in the case where the water spray device 60 is provided with the filter unit 63 as described in the above embodiment, the wire filter 29 provided in the washing and dewatering tub 24 may be eliminated. In this case, the volume of the washing and dewatering tub 24 is increased correspondingly to the removed swarf filter 29.

Further, in the above embodiment, the pulsator 26 starts to rotate after a predetermined time elapses from when the water level in the outer tub 20 reaches the pump start water level and the circulation pump 62 starts operating. However, it is also possible to start the rotation of the pulsator 26 while the circulation pump 62 starts operating.

Further, in the washing process, a washing operation mode may be provided in which the water is stored in the outer tub 20 to a low water level, the pulsator 26 is slowly rotated, or the pulsator 26 is not rotated, and the washing and dewatering tub 24 is slowly rotated. Water is sprayed from each of the nozzles 105 of the head 61.

Further, in the above embodiment, an example in which the present invention is applied to the fully automatic washing machine 1 in which the drying function of the laundry is not carried out is shown. However, the present invention can also be applied to a fully automatic washing and drying machine equipped with a drying function of clothes.

In addition, the embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

Claims

A washing machine characterized by comprising:

The outer tub is elastically supported in the box body;

Washing the dewatering bucket and arranging in the outer tub;

a pump disposed in the tank to extract water stored in the outer tub;

The spray head has a nozzle facing the inside of the washing and dewatering tub, and water drawn by the pump is sprayed from the nozzle toward the washing dewatering bucket below.
The washing machine according to claim 1, further comprising:

a pulsator disposed at a bottom of the washing and dewatering bucket;

a driving portion for driving the pulsator;

Control department,

The spray head is configured to spray water from the nozzle to a partial area of the washing and dewatering bucket that is offset from the central axis,

When the water is supplied into the outer tub during the washing process, the control unit rotates the pulsator by the driving portion while the pump is operating.
A washing machine according to claim 1 or 2, characterized in that

In the head, a plurality of the nozzles are disposed at a predetermined interval on a surface facing the inside of the washing and dewatering tub.
A washing machine according to any one of claims 1 to 3, characterized in that

In the shower head, an introduction port for introducing water from the pump is provided on an inner peripheral surface side of the washing and dewatering tub than the nozzle,

The injection port of the water in the nozzle faces a direction inclined to the opposite side of the inner peripheral surface side from directly below the head.
The washing machine according to any one of claims 1 to 4, further comprising:

a filter housing for passage of water drawn by the pump;

The filter is housed in the filter housing.
A washing machine according to claim 5, wherein

The pump includes a pump housing, an impeller disposed in the pump housing, and a motor for rotating the impeller,

The outflow port of the water in the filter housing is opposed to the suction port of the water in the pump casing, and a connection pipe is connected between the outflow port and the suction port.