JP5326034B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine having a function of washing a tub.

  In some washing machines, dirt is attached to the inner tub and the outer tub, so that a course for washing the tub can be set separately from the washing operation. However, in the course for the purpose of cleaning the tank, a cleaning chemical is required, and the cleaning operation is complicated, such as an operation for the user to select the tank cleaning course.

  Therefore, as another method for washing the washing machine tub, by providing a bubble injection device for injecting bubbles at the bottom of the outer tub or the inner tub, and injecting the bubbles into the dirt with water stored in the outer tub. A technique for removing dirt has been proposed (see Patent Document 1).

JP 2008-43651 A

  However, in the technique described in Patent Document 1, it is necessary to separately provide bubble generating means and a pump, and there is a problem that the structure of the entire washing machine becomes complicated.

  This invention solves the said subject, The objective is providing the washing machine with which a stain | pollution | contamination does not adhere easily to the back surface of the rotary blade arrange | positioned at the inner bottom face part of an inner tank, even if it is a simple structure. There is.

  The present invention includes a housing, an outer tub that is supported in a vibration-proof manner in the housing and stores water therein, an inner tub that is rotatably supported in the outer tub, and stores laundry, and the inner tub rotates. In a washing machine comprising a driving device to be driven, a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate, and a water supply means for supplying water into the outer tub, the water supply means brings the bottom of the outer tub to the bottom. A rinsing step of spraying rinsing water on the laundry in a state where water has been accumulated is performed, and after draining the water used in the rinsing step, the water at the bottom of the outer tub is maintained at a predetermined water level. The inner tub is rotated at a rotation speed higher than the rotation speed of the inner tub in the rinsing step, and the back surface of the rotor blade is cleaned.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a simple structure, it becomes possible to provide the washing machine with which dirt does not adhere easily to the back surface of the rotary blade arrange | positioned at the inner bottom face part of an inner tank.

It is an external appearance perspective view of the washing machine (washing dryer) concerning a 1st embodiment. It is the schematic which shows the inside of the housing | casing of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is a disassembled perspective view which shows the inside of the housing | casing of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is an expansion perspective view which shows the water supply unit of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is a disassembled perspective view which shows the outer tank cover of the washing machine (washing / drying machine) which concerns on 1st Embodiment. The waterway member which comprises the water supply path of the washing machine (washing / drying machine) which concerns on 1st Embodiment is shown, (a) is the perspective view seen from the bottom face side, (b) is the A section expansion perspective view. It is an expanded sectional view showing the channel member of the washing machine (washing dryer) concerning a 1st embodiment. It is an expanded sectional view showing the attachment position of the channel member of the washing machine (washing and drying machine) concerning a 1st embodiment. It is a figure which shows the function structure of the control apparatus of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is the schematic which shows the path | route from the water supply unit of the washing machine (washing dryer) which concerns on 1st Embodiment to a washing machine (washing dryer). It is process drawing explaining the driving | operation process of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is a schematic diagram which shows the flow of the water at the time of the tank washing | cleaning of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is the schematic which shows the washing machine (washing dryer) which concerns on 2nd Embodiment. It is the schematic which shows the waterway member of the washing machine (washing / drying machine) which concerns on 2nd Embodiment. It is the schematic which shows the modification of the channel member of the washing machine (washing / drying machine) which concerns on 2nd Embodiment. It is a flowchart of the tank washing | cleaning process of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is the flowchart which showed the tank washing shower operation | movement of the spin-drying | dehydration process of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is a figure which shows the modification of the operation panel of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is a figure which shows the state which expand | deployed the washing and dewatering tank of the washing machine (washing / drying machine) which concerns on 1st Embodiment. It is the figure which looked at the rotary blade of the washing machine (washing / drying machine) which concerns on 1st Embodiment from the front side. It is the figure which looked at the rotary blade of the washing machine (washing / drying machine) which concerns on 1st Embodiment from the back side. It is AA sectional drawing of the rotary blade shown in FIG.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In the following description, a washing / drying machine capable of performing steps from washing to drying will be described as an example of the washing machine.

<< First Embodiment >>
As shown in FIG. 1, the washing / drying machine 1A is a vertical washing machine (vertical washing / drying machine) in which the rotation axis of the washing and dewatering tank 8 (inner tank, see FIG. 2) is substantially vertical. An upper surface cover 2a is provided on the upper portion of the casing 2 of the washing / drying machine 1A, and an outer lid 3 is provided on the upper surface cover 2a. The outer lid 3 is folded in a mountain shape and opened to the rear side, thereby opening the opening 2b (see FIG. 2) and allowing clothes (laundry) to be taken in and out of the washing and dewatering tub 8 (see FIG. 2). ing.

  On the back side (rear side) of the top cover 2a, a water supply hose connection port 4 from the water tap and a water absorption hose connection port 5 for remaining hot water in the bath are provided. A power button 6 is provided on the front side of the top cover 2a, and an operation panel 7 including an operation button 7a and a display 7b is provided on the front side of the outer lid 3.

  As shown in FIG. 2, a washing / drying machine 1A includes a washing / dehydrating tub 8, an outer tub 9, a driving device 10, a detergent / finishing agent charging device 11, a water supply unit 12A, a drying duct 20 and the like in a housing 2. It has.

  The washing and dewatering tub 8 has a bottomed cylindrical shape and includes a body plate 8a formed of a stainless steel plate or the like. A large number of through-holes (see FIG. 2, only part of which are shown) 8a1 for water flow and ventilation are formed in the body plate 8a. The washing and dewatering tub 8 includes a rotary blade 8b on the inner bottom surface.

  The outer tub 9 has a bottomed cylindrical shape, includes a washing and dewatering tub 8 coaxially, and includes an outer tub cover 9a on the upper portion thereof. The user of the washing and drying machine 1A can put clothes in and out of the washing and dewatering tub 8 through the opening 2b by opening the outer lid 3 and the lid member 9c of the outer tub cover 9a.

  The driving device 10 is disposed at the center outside the bottom surface of the outer tub 9. The drive device 10 includes a motor 10a and a clutch mechanism 10b, and a rotation shaft 10c of the drive device 10 is configured to pass through the outer tub 9 and to be coupled to the washing / dehydrating tub 8 and the rotary blade 8b. . The clutch mechanism 10b has a function of transmitting the rotational power of the motor 10a to the washing and dewatering tub 8 and / or the rotary blade 8b. The motor 10a includes a rotation detection device 28 configured by a Hall element or a photo interrupter that detects the rotation, and a motor current detection device 29 that detects a current flowing through the motor 10a.

  The charging device 11 is provided on the front side of the top cover 2a. The detergent and the finishing agent are charged between the outer tub 9 and the washing / dehydrating tub 8 by the charging hose 11a.

  The water supply unit 12A is provided on the back side of the top cover 2a. This water supply unit 12A supplies tap water from the water supply hose connection port 4 to the charging device 11 and a water-cooled dehumidification mechanism (not shown) described later. In addition, the water supply unit 12A supplies the tap water from the water supply hose connection port 4 and the bath water from the water absorption hose connection port 5 (see FIG. 1) to the outer tub 9 and the washing / dehydration tub 8 via the water injection hose 11b. Water can be poured into the outer tub 9 from between. Further, the water supply unit 12A can inject tap water from the water supply hose connection port 4 into the upper portion of the washing and dewatering tank 8 through the cleaning hose 11c. The detailed description of the water supply unit 12A will be described later with reference to FIG.

  The drop portion 9 m provided on the bottom surface of the outer tub 9 is connected so as to communicate with the lower communication pipe 13. The lower communication pipe 13 is connected so as to communicate with the washing water drainage path 15 via the drain valve 14. By closing the drain valve 14, washing water and rinsing water can be stored in the outer tub 9. Further, by opening the drain valve 14, the water in the outer tub 9 can be drained outside the washing / drying machine 1 </ b> A through the washing water drainage channel 15.

  The lower communication pipe 13 is connected so as to communicate with a washing water circulation channel 18 (partially omitted) via a foreign matter removing device 16 and a circulation pump 17 installed at the lower part of the housing 2. The washing water circulation channel 18 is connected to communicate with a lint removal device (not shown) provided above the washing and dewatering tub 8.

  When the circulation pump 17 is driven, the water in the outer tub 9 flows into the foreign matter removing device 16 through the drop portion 9m and the lower communication pipe 13 to remove the foreign matter, and flows into the suction port of the circulation pump 17. The water sent from the circulation pump 17 flows into the waste thread removing device via the washing water circulation channel 18 to remove the waste thread, and the water from which the waste thread has been removed (circulated water) is placed in the washing and dewatering tank 8. Water is sprayed to spray from.

  The drying duct 20 is installed vertically inside the back surface of the housing 2, and the lower part of the duct is connected to the drop portion 9m of the outer tub 9 by a rubber bellows tube 20a. A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 20, and cooling water is supplied from the water supply unit 12A to the water-cooled dehumidifying mechanism. The cooling water flows down the wall surface (metal plate made of stainless steel or the like) of the drying duct 20 and enters the drop portion 9m, and is discharged to the outside through the lower communication pipe 13 and the washing water drainage path 15.

  The outlet of the drying duct 20 is connected to the inlet of the fan 21, and the outlet of the fan 21 is connected to the heater 22. The outlet of the heater 22 is connected to the blowout nozzle 24 via a blower duct 23 and a rubber bellows tube 23a.

  As described above, in the drying process, the air in the outer tub 9 is water-cooled and dehumidified by the drying duct 20 and sucked from the suction port of the fan 21, and the air discharged from the fan 21 is heated by the heater 22, so Can be blown out from the blowing nozzle 24 into the washing and dewatering tub 8.

  Although not shown, the air duct 23 has a temperature sensor for detecting the temperature of the air blown toward the washing and dehydrating tub 8 during the drying operation, and the drop portion 9m of the outer tub 9 has a washing A temperature sensor for detecting the temperature of the water and the temperature of the air sucked into the drying duct 20 during the drying operation, between the lower communication pipe 13 and the drain valve 14, the temperature of the washing water and the washing water drainage during the drying operation A temperature sensor that detects the temperature of the air discharged from the passage 15 to the outside of the machine, and an acceleration sensor that detects vibration acceleration due to vibration of the outer tub 9 are provided on the upper side of the outer tub 9. Moreover, the water level sensor (not shown) which detects the water level of the washing water stored in the outer tub 9 is provided.

  As shown in FIG. 3, the washing and dewatering tub 8 includes a balance ring (also referred to as a fluid balancer) 8c formed of a synthetic resin or the like at the upper edge of the body plate 8a. The balance ring 8c is configured by enclosing a fluid having a large specific gravity therein, and when the washing / dehydration layer 8 rotates, the fluid moves in the balance ring 8c when eccentricity occurs due to the bias of the laundry. This cancels the eccentricity and maintains the balance of rotation.

  The outer tank cover 9 a has a substantially semicircular inlet 9 b and is attached to the upper edge of the outer tank 9. The insertion port 9b is provided with a lid member 9c (see FIG. 2) attached so as to be openable and closable. Further, on the back side (rear side) of the outer tub cover 9a, a connection port 9d to which an end of the washing water circulation channel 18 (see FIG. 2) is connected, and a connection port to which the bellows tube 23a (see FIG. 2) is connected. 9e is provided with a connection port 9f to which a tank cleaning hose 11c described later is connected. In addition, about the part which overlaps with FIG. 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 4, the water supply unit 12A includes a detergent water supply electromagnetic valve 12a, a finishing agent / tank cleaning water supply electromagnetic valve 12b, a cooling water supply electromagnetic valve 12c, an outer tank water supply electromagnetic valve 12d, and a switching electromagnetic valve 12e. A bath water pump 12f, and a water supply path unit 30.

  The detergent water supply solenoid valve 12a passes the tap water from the water supply hose connection port 4 through the water supply path unit 30 from the water inlet (not shown) and through the hose 12i (see FIG. 2) connected to the water outlet 32. Then, water is supplied to a detergent charging chamber (not shown) of the charging device 11 (see FIG. 2). The tap water poured into the detergent charging chamber is poured into the outer tub 9 through the charging hose 11a (see FIG. 2) together with the detergent introduced.

  The finishing agent / tank washing water supply electromagnetic valve 12b is a water channel which will be described later via a washing hose 11c connected to the water outlet 34 through the water supply passage unit 30 from the water inlet 33 through the water supply hose connection port 4. Water is supplied to the member 50.

  Further, the finishing agent / bath cleaning water supply electromagnetic valve 12b connects the tap water from the water supply hose connection port 4 through the water supply path unit 30 through the water supply path unit 30 to the water outlet 35 when the switching electromagnetic valve 12e is opened. Water is supplied to a finishing agent charging chamber (not shown) of the charging device 11 (see FIG. 2) through the hose 12j. The tap water poured into the finishing agent charging chamber is poured into the outer tub 9 through the charging hose 11a (see FIG. 2) together with the finished finishing agent.

  The cooling water supply electromagnetic valve 12c supplies tap water from the water supply hose connection port 4 to a water cooling / dehumidification mechanism (not shown) of the drying duct 20 (see FIG. 2) via a hose (not shown).

  The outer tank water supply electromagnetic valve 12d supplies tap water from the water supply hose connection port 4 into the outer tank 9 from a water injection hose 11b (see FIG. 2) connected to the flow path 12h.

  The switching solenoid valve 12e switches whether to supply water for the finishing agent.

  In addition, the bath water from the water absorption hose connection port 5 pumped up by the bath water pump 12f is supplied into the outer tub 9 from a water injection hose 11b (see FIG. 2) joined and connected to the flow path 12h.

As shown in FIG. 5, the water channel member 50 is fixed to the lower surface of the outer tub cover 9 a via the plurality of screws 60 in the outer tub cover 9 a. The water channel member 50 is formed in a substantially circular shape with a synthetic resin or the like, and has a concave water channel 50 s formed so that the concave surface faces the outer tank cover 9 a side.
Moreover, the water channel member 50 is arrange | positioned so that it may wrap around along the peripheral part of the outer tank cover 9a.

  Further, the water channel member 50 includes a plurality of attachment portions 51 and 52 for fixing screws. The mounting portion 51 has a mountain-shaped piece portion 51a formed so as to protrude inwardly (inward in the radial direction), and a screw insertion hole 51b penetrating in the vertical direction is formed in the piece portion 51a. Yes. The attachment portion 52 has a piece portion 52a formed outward, and a screw insertion hole 52b penetrating in the vertical direction is formed in the piece portion 52a. In the present embodiment, each of the six attachment portions 51 and the attachment portions 52 is spaced apart in the circumferential direction, and the attachment portions 51 and the attachment portions 52 are alternately arranged.

  Further, the water channel member 50 is formed such that the water channel 50 s protrudes inwardly and meanders at a position where the attachment portion 52 is formed. Therefore, the outer peripheral edge of the water channel member 50 is formed to be substantially a circle. Thus, by eliminating the portion that protrudes outside the water channel member 50, the water channel member 50 can be disposed closer to the outer peripheral edge of the outer tub cover 9a, and the washing / dehydrating tub 8 and the outer tub 9 The water channel member 50 can be suitably arranged at a position facing the gap.

  As shown to Fig.6 (a), 24 side surface side sprinkling ports 50b1 are formed in the inner surface 50b of the water channel member 50 at intervals in the circumferential direction (only one part is shown). As shown in FIG. 6B, four bottom surface side water spouts 50 a 1 are formed on the bottom surface 50 a of the water channel member 50 at intervals in the circumferential direction.

  As shown in FIG. 7, the bottom surface side water spout 50a1 penetrates the bottom surface 50a so as to incline with respect to the vertical direction so as to face the inside. The number of the bottom-side watering port 50a1 and the side surface-side watering port 50b1 is not limited to the number of the present embodiment, and can be appropriately increased or decreased according to the type of the washing / drying machine 1A and the internal structure.

  As shown in FIG. 8, the water channel member 50 is accommodated in the lower surface of the outer peripheral edge of the outer tub cover 9a, and a recess 9a1 is formed along the circumferential direction. In addition, two grooves 9a3 and 9a4 are formed on the bottom surface 9a2 of the recess 9a1 at positions corresponding to the inner side surface 50b and the outer side surface 50c of the water channel member 50. A seal member (not shown) is injected into the grooves 9a3 and 9a4, and the mounting portions 51 and 52 are fixed to the outer tank cover 9a with the grooves 9a3 and 9a4 attached to the inner surface 50b and the outer surface 50c. By doing so, the water channel member 50 is watertightly fixed with respect to the outer tank cover 9a. Further, at this time, the side surface water spray port 50b1 of the water channel member 50 faces the side wall 9a5 of the recess 9a1.

  By attaching the water channel member 50 to the outer tub cover 9a in this way, in this embodiment, the water channel member 50 corresponds to the gap T between the washing and dewatering tub 8 (balance ring 8c) and the outer tub 9. Placed in position. In the present embodiment, a space surrounded by the bottom surface 50a, the inner side surface 50b and the outer side surface 50c of the water channel member 50 and the bottom surface 9a2 of the outer tub cover 9a facing the concave surface of the water channel member 50 corresponds to the water supply path. .

  As shown in FIG. 9, the washing / drying machine 1 </ b> A includes a control device 100. The control device 100 is configured around a microcomputer 110. The microcomputer 110 includes an operation pattern database 111, a process control unit 112, a rotation speed calculation unit 113, a clothing weight calculation unit 114, and the like.

  The microcomputer 110 has a function of calling an operation pattern corresponding to an operation course input from the operation button 7a and starting washing or / and drying.

  The process control unit 112 has a function of controlling operation of each of the washing process, the rinsing process, the dehydration process, the tank washing process, and the drying process based on the operation pattern called from the operation pattern database 111. In each process, the process control unit 112 includes a water supply unit 12A (water supply electromagnetic valves 12a to 12d, a switching electromagnetic valve 12e), a drain valve 14, a motor 10a, a clutch mechanism 10b, a heater 22, and a fan 21 via drive circuits. , Has a function of driving and controlling the circulation pump 17.

  The rotation speed calculation unit 113 has a function of calculating the rotation speed of the motor 10a based on the detection value from the rotation detection device 28 that detects the rotation of the motor 10a.

  The clothing weight calculation unit 114 has a function of calculating the weight of clothing in the washing and dewatering tub 8 based on the rotation speed calculated by the rotation speed calculation unit 113 and the detection value of the motor current detection device 29. Since the load for rotating the washing / dehydrating tub 8 is increased due to the increase in the weight of the clothes and a large motor current is required to flow through the motor 10a, the weight of the clothes is determined by the motor current and the rotation speed of the motor 10a. Can be calculated.

  Next, the operation of the washing / drying machine 1A according to the first embodiment will be described with reference to FIGS. FIG. 10 is a schematic view showing a path from a water supply unit of the washing machine (washing / drying machine) to the washing machine (washing / drying machine) according to the first embodiment, and FIG. 11 is a washing machine (washing / drying machine) according to the first embodiment. FIG. 12 is a schematic diagram showing the flow of water during washing of the washing machine (washing / drying machine) according to the first embodiment. The washing operation shown in FIG. 11 is a process diagram for explaining the operation steps of washing → rinsing → tank washing → dehydration → tank washing → (drying).

  As shown in FIG. 10, in the washer / dryer 1A, when the outer tank water supply electromagnetic valve 12d (main) is opened, tap water is injected into the outer tank 9 through the water injection hose 11b. When the detergent water supply electromagnetic valve 12a is opened, tap water is supplied into the outer tub 9 via the hose 12i, the charging device 11, and the charging hose 11a. When the finishing agent / tank washing water supply electromagnetic valve 12b and the switching electromagnetic valve 12e are opened, tap water is supplied into the outer tank 9 through the hose 12j, the charging device 11, and the charging hose 11a. Further, when the finishing agent / tank cleaning water supply electromagnetic valve 12b is opened, tap water is supplied to the water channel member 50 via the cleaning hose 11c. When the cooling water supply electromagnetic valve 12c is opened, tap water is supplied to a water cooling / dehumidifying mechanism (not shown) in the drying duct 20 via a hose (not shown).

  As shown in FIG. 11, in the cloth amount sensing step S <b> 1, the process control unit 112 rotates the washing / dehydrating tub 8, and the garment weight calculation unit 114 calculates the cloth amount for the garment before water injection.

In the water supply / detergent charging step S2, the process control unit 112 opens the outer tank water supply electromagnetic valve 12d, and tap water enters the outer tank 9 from between the outer tank 9 and the washing / dehydrating tank 8 via the water injection hose 11b. Add water.
Further, the process control unit 112 closes after a predetermined time has elapsed since the outer tank water supply electromagnetic valve 12d was opened. This is an operation in which air is contained in the water injection hose 11 b connected to the water supply hose connection port 4, and the air is discharged into the outer tub 9.

  Thereafter, the process control unit 112 opens the detergent water supply electromagnetic valve 12 a and supplies tap water to a detergent charging chamber (not shown) of the charging device 11. The tap water poured into the detergent charging chamber is poured into the outer tub 9 together with the poured detergent. Further, the process control unit 112 closes the detergent water supply electromagnetic valve 12a after a predetermined time has passed since the detergent water supply electromagnetic valve 12a is opened (or after reaching a predetermined water level).

  In the detergent combing step S3, the process control unit 112 drives the circulation pump 17 (or the washing / dehydrating tub 8 or the stirring blade 8a) to dissolve the detergent and generate a highly concentrated detergent solution.

  In the rotary water supply process S4, the process control unit 112 opens the outer tank water supply electromagnetic valve 12d to supply water to the outer tank, and drives the circulation pump 17 while rotating the washing / dehydrating tank 8 and / or the rotary blade 8b. Then, a high-concentration detergent solution is sprayed from the lint removing device 19 to the clothes in the washing and dewatering tub 8. At this time, the finishing agent / tank washing water supply electromagnetic valve 12b may be opened to wash the outer tub 9 and the washing / dehydrating tub 8.

  In the pre-washing step S5, the clothes are washed with a high-concentration detergent solution.

  In the cloth quality sensing step S6, first, the clothing weight calculation unit 114 calculates the weight of the clothing containing water. Then, the cloth quality (water absorption) of the clothes is determined from the weight of the clothes not including water calculated in the cloth amount sensing step S1 and the weight of the clothes including water calculated in the cloth quality sensing step S6. The following steps are controlled according to the determined cloth quality of the garment.

  In the washing / water supply step S7, the process control unit 112 matches the weight of the clothes calculated in the cloth amount sensing step S1 and the cloth quality of the clothes determined in the cloth quality sensing step S6. ) Supply water inside.

  In the main washing process S8, the process control unit 112 rotates the rotor blades 8b (or alternately rotates in the forward and reverse directions) to wash the clothes. At this time, the circulation pump 17 may be driven to spray the detergent solution on the clothes. Although not shown, in the main washing step S8, the rotating blades 8b are alternately rotated in the forward and reverse directions to perform an operation of loosening clothes. Further, the process control unit 112 repeats the main washing process and the loosening process several times. When the main washing is completed, the unbalanced state of the clothing is monitored to determine whether or not to shift to dehydration.

  In the drainage process S9, the process control unit 112 opens the drain valve 14 and drains the wash water in the outer tub 9.

  In the dehydration step S10, after the drainage is finished, the process control unit 112 rotates the washing and dewatering tank 8 to dehydrate water (wash water) contained in the clothes.

  In the rotary shower step S <b> 11, the process control unit 112 closes the drain valve 14, opens the outer tank water supply electromagnetic valve 12 d, and supplies rinse water to the washing and dewatering tank 8. Then, the rinsing water is sprayed on the clothes in the washing / dehydrating tub 8 while rotating the washing / dehydrating tub 8.

  In the dehydration process S12, the process control unit 112 stops the circulation pump 17 while rotating the washing and dehydrating tub 8, and dehydrates the rinsing water from the clothes.

  In the rotary shower step S <b> 13, the process control unit 112 sprays rinse water on the clothes in the washing / dehydrating tub 8 while rotating the washing / dehydrating tub 8.

  In the draining step S14, the process control unit 112 stops the washing / dehydrating tub 8 and the circulation pump 17, opens the drain valve 14, and drains the rinsing water in the outer tub 9.

  In the dehydration step S15, after the drainage is finished, the process control unit 112 rotates the washing and dehydrating tank 8 to dehydrate water (rinse water) contained in the clothes.

  In the rinsing water supply step S16, the process control unit 112 closes the drain valve 14, opens the finishing agent / bath washing water supply electromagnetic valve 12b, and rotates the washing / dehydration tub 8 while washing and removing the outer tub 9. The water tank 8 is washed. After a predetermined time has elapsed (or after reaching a predetermined water level), the switching electromagnetic valve 12e is opened for a predetermined time, and rinse water containing a finishing agent is supplied to the washing and dewatering tank 8. In the water supply step S16, the process control unit 112 opens the outer tub water supply electromagnetic valve 12d and supplies rinsing water to the outer tub 9 (or the washing and dewatering tub 8).

  In the loosening step S <b> 17, the process control unit 112 performs an operation of loosening clothes by alternately rotating the rotary blades 8 b in the forward and reverse directions.

  In the stirring step S18, the process control unit 112 rotates the washing and dewatering tub 8 in a state where rinsing water is accumulated in the outer tub 9, and rinses the clothes while stirring them.

  In the tank cleaning step S19, the process controller 112 rotates the rinsing / dehydrating tank 8 to clean the upper and lower surfaces of the bottom surface of the washing / dehydrating tank 8 and the lower surface of the rotating blade 8b.

  Here, the structure of the rotary blade 8b will be described in detail.

  20 is a front side view of the rotary blade 8b as viewed from above, FIG. 21 is a back side view of the rotary blade 8b as viewed from below, and FIG. 22 is a cross-sectional view taken along line AA in FIG. . The rotor blade 8b is formed in a substantially circular shape having a diameter that covers part or all of the inner bottom surface of the inner tank 8.

As shown in FIG. 20, the rotor blade 8b has a plurality of, for example, two peak portions 8b1 that are gradually formed higher from the center side to the outer diameter side. The peak portion 8b1 is inclined in a wave shape in the rotation direction, and the peak portion of the wave shape is continuous from the center side to the outer diameter side to form a peak portion.
For this reason, when the rotary blade 8b rotates, the clothing jumps up by the peak portion, and the clothing is efficiently replaced.

  Further, a plurality of, for example, two substantially flat valley portions 8b2 are provided between the plurality of peak portions 8b1 of the rotary blade 8b. In the valley portion 8b2, a plurality of convex portions 8b3 are formed radially and alternately from the center side to the outer diameter side. By this convex part 8b3, a shiatsu effect can be given to the clothing dropped from the mountain part 8b1, or the movement of the clothes can be activated, resulting in an improvement in cleaning power. Further, the valley portion 8b2 is provided with a plurality of valley portion through holes 8b4 to prevent a water film from being formed between the clothing and the rotor blade 8b.

  As shown in FIGS. 21 and 22, circumferential ribs 8b5 and radial ribs 8b6 are provided on the back side of the rotary blade 8b to ensure strength and the like. Here, among the spaces partitioned by the circumferential ribs 8b5 and the radial ribs, air easily collects in the partition space 8b7 formed on the back side of the peak portion 8b1, and dirt may remain. However, by providing the peak portion through-hole 8b8 as in the present embodiment, a flow of water from the back side to the front side of the rotary blade 8b is produced, and adhesion of dirt to the partition space 8b7 can be suppressed. Moreover, if the peak part through-hole 8b8 is formed in the outer diameter side of the partition space 8b7, a high centrifugal force will act and the flow of water will become still better.

  Moreover, as a position which provides the mountain part through-hole 8b8, it is between the circumferential direction edge part and peak part in the mountain part 8b1, Comprising: The circumferential direction edge part vicinity is desirable. Then, since the mountain through hole 8b8 does not exist in the vicinity of the peak, clothes can be prevented from being caught. In addition, this peak part through-hole 8b8 and valley part through-hole 8b4 pass not only waste water but the warm air at the time of drying.

  Next, operation | movement of tank cleaning process S19 is further demonstrated using FIG.

  The process control unit 112 determines whether or not the rinse water is equal to or lower than the predetermined water level s (step 161). If the water level is higher than the predetermined water level s, the process control unit 112 opens the drain valve 14 to drain the rinse water (step 162). ). The predetermined water level s is, for example, higher than the bottom surface of the washing / dehydrating tub 8 and the bottom surface of the rotary blade 8b. When the water level falls below the predetermined water level s, the drain valve 14 is closed (step 163).

  Thereafter, the process control unit 112 causes the washing / dehydrating tub 8 to rotate at a rotational speed (for example, 80 to 130 r / min) faster than the rotational speed (35 r / min) in the rotary water supply process S4 and the rotary shower processes S11 and S13. ) And the rotating blade 8b (step 164). As a pattern for rotating the washing and dewatering tub 8, in addition to rotating in the forward direction (one direction), the washing / dehydrating tub 8 may be rotated in the reverse direction, or may be rotated alternately in the forward direction and the reverse direction. Good.

  It is determined whether a predetermined time t (for example, 90 to 120 seconds) has elapsed (step 165). If the predetermined time t has elapsed, the washing and dewatering tub 8 is stopped (step 166). Although the washing / dehydrating tub 8 is stopped in step 166, it is not always necessary to stop the washing / dehydrating tub 8. The washing / dehydrating tub 8 may be shifted to the dehydration step while being rotated.

  Further, in this tank washing step S19, the drain valve 14 is opened, and after all the rinse water used in the rinse 2 (final rinse) is drained once, the drain valve 14 is closed, and the finishing agent / tank washing water supply valve It may be executed after opening the valve 12b and supplying water to a predetermined water level while rotating the washing and dewatering tank 8.

  The tank washing step S19 rotates the washing / dehydrating tub 8 in a state where rinse water (or tap water) is stored at the bottom of the outer tub 9, so that the bottom surface of the outside of the washing / dehydrating tub 8 and the bottom surface of the rotary blade 8b Dirt and dust adhering to the surface can be removed, and adhesion of dirt and dust can be suppressed. Moreover, since the peak part through-hole 8b8 is provided also in the peak part 8b1 in the rotary blade 8b, adhesion of dirt can also be suppressed about the partition space 8b7 formed in the back side of the peak part 8b1.

  When the tank cleaning step S19 is completed, the process control unit 112 monitors the clothing imbalance state and determines whether or not to proceed to final dehydration.

  In the drainage process S20, the process control unit 112 opens the drain valve 14 to drain the rinse water in the outer tub 9.

  In the dehydration / tank washing shower process S21, after the drainage is completed, the process control unit 112 rotates the washing / dehydrating tank 8 at a high speed to remove moisture contained in the clothes. In this dehydration / tank washing shower step S21, the tank washing in which water is jetted from a sprinkler, which will be described later, in the middle of increasing the rotation speed of the washing and dehydration tank 8 for dehydration (when it reaches a predetermined rotation speed). A shower operation is taken in, and the operation will be further described with reference to FIG.

  The process control unit 112 rotates the washing and dewatering tub 8 and accelerates it step by step (step 171). It is determined whether or not the rotation is less than a predetermined rotation n1 (for example, 400 r / min) (step 172). When the predetermined rotational speed n1 is reached, the finishing agent / bath cleaning water supply electromagnetic valve 12b is opened while the predetermined rotational speed n1 is maintained (step 173), and cleaning water (tap water) is supplied to the water channel member 50 ( Step 174). Water is supplied to the channel member 50 until a predetermined time t1 (for example, 30 to 120 seconds) elapses (step 175). Here, the water supply path extending in the rotation direction of the washing / dehydrating tub 8 is provided with a plurality of water spouts to be described later, and the tap water sprayed from the water spouts is the inner wall surface of the outer tub 9 or the washing / dehydrating tub 8. As a result of gravity flowing down along the outer wall surface, dirt does not easily adhere to the outer tub 9 and the washing / dehydrating tub 8. When the predetermined time t1 has elapsed, the finish agent / tank washing water supply electromagnetic valve 12b is closed (step 176), the washing and dewatering tank 8 is further accelerated (step 177), and the moisture contained in the clothing is continuously dehydrated. Remove.

  Although the case where the predetermined rotational speed n1 is held has been described, it is not necessary to be limited to the predetermined rotational speed n1, and a predetermined rotational speed n2 (for example, 600 r / min) is set, and acceleration from the predetermined rotational speed n1 to the predetermined rotational speed n2 Further, it may be executed while the predetermined rotation speed n2 is held for a predetermined time t2 (for example, 30 to 120 seconds).

  When water is supplied to the water supply member 50, as shown in FIG. 12, tap water is discharged from the side surface water sprinkling port 50b1 of the water channel member 50, and the bottom surface 9a2 of the recess 9a1 formed in the outer tub cover 9a as shown by the solid line arrow. Then, it falls on the outer peripheral edge upper surface 8c1 of the balance ring 8c of the washing and dewatering tub 8. At this time, since the washing / dehydrating tub 8 is rotating at a high speed, the tap water that has fallen on the outer peripheral edge upper surface 8c1 of the balance ring 8c is caused by the centrifugal force generated when the washing / dehydrating tub 8 is rotated. It is blown off toward the inner peripheral surface 9s. The tap water blown to the inner peripheral surface 9s of the outer tub 9 flows down the inner peripheral surface 9s of the outer tub 9 downward in the vertical direction by the action of gravity. Further, since a plurality of side surface water sprinkling ports 50b1 are formed in the water channel member 50 and blown off by centrifugal force, tap water is sprayed on the entire inner peripheral surface 9s in the upper part of the outer tub 9, and then flows downward. Therefore, tap water flows through the entire inner peripheral surface of the outer tub 9 from the upper part to the lower part. Accordingly, the entire dirt and dust on the inner peripheral surface of the outer tub 9 are removed, and adhesion of dirt and dust can be suppressed.

As shown in FIG. 12, when tap water is sprinkled from the bottom side sprinkling port 50a1 of the water channel member 50, it is sprayed to the outer peripheral surface 8s of the upper part (balance ring 8c) of the washing and dewatering tub 8.
The tap water sprayed on the outer peripheral surface 8s flows down the outer peripheral surface 8s of the washing and dewatering tub 8 vertically downward by the action of gravity. Note that a part of tap water dripped from the side-side water spout 50b1 to the outer peripheral edge upper surface 8c1 also moves downward on the outer peripheral surface 8s of the washing and dewatering tub 8 by the action of gravity, as shown by a thin broken line in FIG. And flow down.

  In this way, by sprinkling tap water from the side surface watering port 50b1 and the bottom surface side watering port 50a1 of the water channel member 50 to the upper part (outer peripheral edge portion) of the washing and dewatering tank 8, the inner peripheral surface 9s of the outer tank 9 is obtained. In addition, it is possible to suppress the adhesion of dirt and dust to the outer peripheral surface 8s of the washing and dewatering tub 8.

  In addition, when the mode which performs a series of operation | movement from washing to drying is set, drying process S22 is performed after spin-drying | dehydration process S21. In the drying step S22, the process control unit 112 opens the cooling water supply electromagnetic valve 12c, energizes the heater 22, and drives the fan 21. After the drying step (S22), the user opens the outer lid 3 and the lid member 9c, takes out the dried clothes, closes the lid member 9c and the outer lid 3, and presses a predetermined button (for example, a start button), The tank washing shower process S23 is started.

  In the tub washing shower step S23, the garment weight calculating unit 114 determines whether or not clothing remains in the washing and dewatering tub 8. If there is no clothing, the tub washing shower operation in the dehydration and tub washing shower step S21 is performed. Similarly, tap water is sprayed from the water channel member 50 to the outer peripheral surface 8 s of the washing and dewatering tub 8 and the inner peripheral surface 9 s of the outer tub 9. In the tank cleaning shower step S23, tap water is sprinkled by the tank cleaning shower operation, and then the drain valve 14 is opened to drain the water. Then, the heater 22 is energized and the fan 21 is driven, and the outer tank 9 and It is also possible to dry the washing and dewatering tank 8 and suppress the growth of mold and the generation of off-flavors.

  The tank cleaning and tank cleaning shower operations of the tank cleaning process S19, dehydration / tank cleaning shower process S21, and tank cleaning shower process S23 can be set ON / OFF by a button provided on the washing / drying machine 1A and selected by the user. It is possible.

  FIG. 18 is a diagram illustrating a modified example of the operation portion in the washing / drying machine 1A according to the first embodiment. When the washing course is started with the automatic tank washing button 25 set, the tank washing process S19 and the dehydration / tank washing shower process S21 are performed. When the washing course is started without setting, the tank washing is performed. Absent.

  When the washing / drying course is started with the automatic tank washing button 25 set, first, the tank washing step S19 and the dehydration / bath washing shower step S21 are performed as in the washing course. Then, when drying process S22 is complete | finished, the button 25 for automatic tank washing | cleaning will be in the state of lighting or blinking. At this time, you may provide the function which carries out voice guidance with respect to the user for the operation method for moving to tank washing shower process S23 as needed. When the user takes out the dried clothes and then operates the start button 26 (or the automatic tank washing button 25), the tank washing shower process S23 is started, and when the power button 27 is operated, the tank washing shower process. The process ends without carrying out S23. In addition, when predetermined time passes after drying process S22 is complete | finished, the button 25 for automatic tank washing | cleaning will turn off and a power supply will be turned off.

  In this way, by providing a button operation or the like for confirming that the user has finished taking out the clothes, the tank washing shower process S23 is started with the clothes after drying in the washing and dewatering tank 8. Can be prevented. Moreover, in order to exclude the possibility of performing a bath washing shower with clothing remaining, the bath washing shower step S23 after drying may not be provided.

  Furthermore, the tank washing step S19 or the dehydration / bath washing shower step S21 is always performed regardless of the setting of the automatic tank washing button 25, and only the tank washing shower S23 is selected by the automatic tank washing button 25. It is possible to make it possible.

  As described above, in the washing / drying machine 1A according to the first embodiment, the outer tub cover 9a is provided with the water supply path (water channel member 50) extending in the circumferential direction of the washing and dewatering tub 8, and water is supplied to the water supply path. A side-side water sprinkling port 50b1 for spraying tap water supplied from the unit 12A (water supply means) to the upper portion (outer peripheral surface 8c1) of the washing and dewatering tub 8 is provided. According to this, by supplying water to the water channel member 50 when the washing and dewatering tub 8 is rotated, the tap water is blown off to the inner peripheral surface 9 s of the extrapolation 9, and dirt adhered to the inner peripheral surface 9 s of the outer tub 9. And dust can be removed, and adhesion of dirt and dust can be suppressed. By suppressing the adhesion of dirt and dust in this way, it is possible to suppress the growth of mold and the generation of off-flavors. Furthermore, it is possible to prevent or suppress dust from adhering to the laundry being washed.

  Moreover, in 1st Embodiment, since the bottom face side water sprinkling port 50a1 which sprinkles water on the outer peripheral surface 8s (outer peripheral surface of the balance ring 8c) of the washing and dehydrating tub 8 is provided, the outer peripheral surface 8s of the washing and dehydrating tub 8 is provided. The adhered dirt and dust can be removed, and the adhesion of dirt and dust can be suppressed. By suppressing the adhesion of dirt and dust in this way, it is possible to suppress the growth of mold and the generation of off-flavors, and to prevent and suppress the adhesion of dust to the laundry being washed.

  Furthermore, in the first embodiment, the rinsing process is executed in a state where water is stored in the outer tub 9 by the water supply means, and the water used in this rinsing process is drained by opening the drain valve 14, and a predetermined water level (For example, when the water level is higher than the bottom bottom edge of the washing / dehydrating tub 8), the drain valve 14 is closed and rotated at a higher speed than the washing / dehydrating tub 8 in the rinsing process. By shifting to the process, it is possible to prevent dirt from adhering to the outer tub 9, the bottom surface of the washing / dehydrating tub 8, the back side of the rotary blade 8b, etc. while saving water.

  Further, the amount of water used can be suppressed by controlling the timing at which the finishing agent / bath washing water supply electromagnetic valve 12b is opened in the vessel washing step S19, the dehydration step S21, and the vessel washing shower step S23. . That is, by washing the tank after the rinsing step, the outer tub 9 and the washing / dehydrating tub 8 can be washed with clean tap water, so that the tank can be efficiently washed.

  Further, since a small amount of tap water is blown off by centrifugal force, the inner peripheral surface of the outer tub 9 and the outer peripheral surface of the washing and dewatering tub 8 can be washed, so that the amount of water used is reduced compared with the case where the tap water is sprayed and washed. be able to.

<< Second Embodiment >>
FIG. 13 is a schematic view showing a washing machine (washing and drying machine) according to the second embodiment, FIG. 14 is a schematic view showing a water channel member of the washing machine (washing and drying machine) according to the second embodiment, and FIG. It is the schematic which shows the modification of the channel member of the washing machine (washing / drying machine) which concerns on embodiment.

  As shown in FIG. 13, the washing / drying machine (washing machine) 1B is a vertical type washing / drying machine, similarly to the first embodiment, and includes a water supply unit 12B instead of the water supply unit 12A according to the first embodiment. It is a thing. The water supply unit 12B includes an outer tank water supply electromagnetic valve 12m, a finishing agent water supply electromagnetic valve 12n, a cooling water supply electromagnetic valve 12o, and a tank cleaning water supply electromagnetic valve 12p for main (outer tank water supply).

  The outer tank water supply electromagnetic valve 12m is opened by the control device 100 (process control unit 112), so that tap water from the water supply hose connection port 4 passes through a detergent charging chamber (not shown) of the charging device 11. And water is supplied into the outer tub 9.

  The finishing agent water supply solenoid valve 12n is opened by the control device 100 (process control unit 112), so that tap water from the water supply hose connection port 4 is supplied to the finishing agent supply chamber (not shown) of the input device 11. It is configured to feed water into the outer tub 9 through.

  When the cooling water supply electromagnetic valve 12o is opened by the control device 100 (process control unit 112), tap water from the water supply hose connection port 4 is supplied to the drying duct 20 (see FIG. 2) via a hose not shown. ) Is supplied to a water-cooled dehumidifying mechanism (not shown).

  The tank cleaning water supply electromagnetic valve 12p is opened by the control device 100 (process control unit 112) so that tap water from the water supply hose connection port 4 is supplied to the water channel member 50 (water supply path). It is configured.

  The water supply unit 12B is connected to the water supply hose connection port 4, and the water supply path unit is configured such that tap water flows through an appropriate position by opening and closing each water supply electromagnetic valve 12m, 12n, 12o, 12p.

  The water supply path in 2nd Embodiment is comprised by the water channel member 50 and the outer tank cover 9a similarly to 1st Embodiment, for example, the bottom surface side sprinkling port 50a1 is spaced along the circumferential direction at the bottom surface 50a of the water channel member 50. Is formed.

  As shown in FIG. 14, the water channel member 50 is disposed so that the bottom surface side water spout 50 a 1 and the outer peripheral edge upper surface 8 c 1 of the washing and dewatering tub 8 face each other. Thereby, the tap water sprinkled from the bottom surface side sprinkling port 50a1 is directly sprinkled on the upper part of the washing and dewatering tub 8 (the outer peripheral edge upper surface 8c1 of the balance ring 8c) as indicated by the solid line arrow. At this time, the washing and dewatering tub 8 is rotated, so that tap water is scattered on the inner peripheral surface 9 s of the outer tub 9 by the centrifugal force when the washing and dewatering tub 8 is rotated. The tap water that has fallen on the inner peripheral surface 9s of the outer tub 9 flows down downward in the vertical direction by the action of gravity. Thereby, the dirt and dust adhering to the inner peripheral surface 9s of the outer tub 9 can be removed, and the dirt and dust adhering to the inner peripheral surface 9s can be suppressed.

  Further, as shown in FIG. 15, a plurality of side surface water spray ports 50 c 1 may be formed on the outer surface 50 c of the water channel member 50 at intervals along the circumferential direction. Thereby, the tap water sprayed from the side surface side sprinkling port 50c1 is sprayed directly on the inner peripheral surface 9s of the outer tub 9 as shown by the solid line arrow. The tap water sprayed on the inner peripheral surface 9s flows down the inner peripheral surface 9s in the vertical direction by the action of gravity, and the dirt and dust adhering to the inner peripheral surface 9s are removed, or the inner peripheral surface 9s is contaminated with dirt and dust. Can be prevented from adhering.

  Further, the tap water sprayed on the inner peripheral surface 9s scatters toward the washing / dehydrating tub 8 (balance ring 8c) and adheres to the outer peripheral surface 8s of the washing / dehydrating tub 8. The tap water adhering to the outer peripheral surface 8s flows down downward while the outer peripheral surface 8s is inclined in the vertical direction by the action of centrifugal force and gravity when the washing and dewatering tub 8 is rotated. Thereby, the dirt and dust adhering to the outer peripheral surface 8s of the washing and dewatering tub 8 can be removed, and the dirt and dust adhering to the outer peripheral surface 8s can be suppressed.

  Next, the point where the through-hole 8a1 is devised and the dirt of the outer tub 9 is washed away with water blown off at high speed during dehydration will be described below.

  The body plate 8a in the above-described embodiment uses stainless steel or the like as its material, and specifically, is formed by bending a plate material having a structure as shown in FIG. In addition to the dewatering through hole 8a1, a plurality of overhanging portions 8a3 projecting in a spherical shape toward the rotation center of the washing and dewatering tub 8 are provided on the inner wall surface of the body plate 8a. The diameter of the overhanging portion 8a3 is larger than the diameter of the through hole 8a1, and eight through holes 8a1 are formed around each overhanging portion 8a3, and these through holes 8a1 are concentric with the overhanging portion 8a3. Has been placed. As a result, a gap that becomes a passage for water is easily formed between the overhanging portion 8a3 and the through hole 8a1, so that water dehydrated from the clothing flows into the through hole 8a1 through this gap, and the dewatering performance is improved. Highly maintainable.

  Further, a part of the body plate 8a in the circumferential direction includes a region where the overhanging portion 8a3 and the through hole 8a1 do not exist, and a plurality of auxiliary through holes 8a2 are provided in this region. The auxiliary through-holes 8a2 are formed so as to be shifted from the positions of the respective through-holes 8a1 in the axial direction of the body plate 8a, and are arranged to make up for the spaces between the respective through-holes 8a1. Therefore, the water spouted from the through hole 8a1 and the auxiliary through hole 8a2 to the outer peripheral side of the washing and dewatering tank 8 due to the rotation of the washing and dewatering tank 8 at the time of dehydration is from the upper end in the axial direction of the inner wall surface of the outer tank 9. It will hit all the way to the bottom. As a result, the effect of preventing the adhesion of dirt on the inner wall surface of the outer tub 9 can be obtained without spots. In addition, the area occupying most of the circumferential direction of the body plate 8a is in other areas in the circumferential direction of the body plate 8a while ensuring the arrangement of the through holes 8a1 and the overhanging portions 8a3 so that the dewatering performance can be maintained high. By providing a plurality of different auxiliary through holes 8a2 arranged side by side so as not to overlap in the axial direction, the effect of preventing the adhesion of dirt can be easily added.

  Further, as shown in FIG. 19, the body plate 8a of the present embodiment is composed of a first plate portion 8A1 and a second plate portion 8A2 having the same shape, and auxiliary through holes at one end and the other end in the circumferential direction of each plate portion. The arrangement of 8a2 is symmetrical with respect to the circumferential direction. For this reason, the auxiliary through hole 8a2 can be manufactured in the same mold, and the productivity of the body plate 8a is high.

  As described above, the washing machine according to the first embodiment and the second embodiment has been described by using the vertical type washing and drying machine in which the rotation axis of the washing and dewatering tub 8 is substantially vertical, but is not limited thereto. Further, it may be a vertical type washing machine or a drum type washing machine that does not have a drying function.

1A, 1B Washing and drying machine (washing machine)
2,2A Case 8 Washing / dehydrating tub (inner tub)
8a Body plate 8a1 Through hole 8a2 Auxiliary through hole 8a3 Overhang part 8b Rotary blade 8b1 Mountain part 8b2 Valley part 8b3 Projection part 8b4 Valley part through hole 8b5 Circumferential rib 8b6 Radial rib 8b7 Partition space 8b8 Mountain part through hole 8c Balance ring 8c1 Outer peripheral edge upper surface 8s Outer peripheral surface 9 Outer tank 9a Outer tank cover 9a1 Recess 9a2 Bottom surface 9s Inner peripheral surface 10 Driving device 11c Cleaning hose 12 Water supply unit (water supply means)
25 Automatic tank cleaning button 26 Start button 27 Power button 50 Waterway member (water supply route)
100 control device 112 process control unit (operation control means)

Claims (5)

A housing, an outer tub that is supported in an anti-vibration manner and stores water therein, an inner tub that is rotatably supported in the outer tub and stores laundry, and a driving device that rotationally drives the inner tub And a washing machine including a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate, and water supply means for supplying water into the outer tub,
Wherein after the rinsing water in a state of accumulated water in the bottom of the outer tub to perform the rinsing step is sprayed into the laundry by water supply means, by opening the drain valve to drain the water utilized in the rinsing step, the When the water level reaches a predetermined level higher than the bottom surface of the rotor blade, the drain valve is closed , the inner tank is rotated at a rotational speed higher than the rotational speed of the inner tank in the rinsing step, and the rear surface of the rotor blade is A washing machine characterized by washing. A housing, an outer tub that is supported in an anti-vibration manner and stores water therein, an inner tub that is rotatably supported in the outer tub and stores laundry, and a driving device that rotationally drives the inner tub And a washing machine including a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate, and water supply means for supplying water into the outer tub,
  After performing the rinsing step of spraying rinse water on the laundry in a state where water is accumulated at the bottom of the outer tub by the water supply means, the drain valve is opened to drain the water used in the rinse step, and the rotation The drain valve is closed when the water level reaches a predetermined level higher than the bottom surface of the blade, the inner tank is rotated at a rotational speed higher than the rotational speed of the inner tank in the rotating water supply of the washing step, and the rotary blade A washing machine characterized by washing the back surface. A housing, an outer tub that is supported in an anti-vibration manner and stores water therein, an inner tub that is rotatably supported in the outer tub and stores laundry, and a driving device that rotationally drives the inner tub And a washing machine including a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate, and water supply means for supplying water into the outer tub,
  After performing the rinsing step of spraying rinse water on the laundry in a state where water is accumulated at the bottom of the outer tub by the water supply means, the drain valve is opened to drain the water used in the rinse step, and the rotation Washing the back surface of the rotary blade by closing the drain valve when the water level reaches a predetermined level higher than the bottom surface of the blade and rotating the inner tub at a rotational speed higher than 80 r / min. Machine. A housing, an outer tub that is supported in an anti-vibration manner and stores water therein, an inner tub that is rotatably supported in the outer tub and stores laundry, and a driving device that rotationally drives the inner tub And a washing machine including a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate, and water supply means for supplying water into the outer tub,
  After performing the final rinsing step of spraying rinse water on the laundry in a state where water is accumulated at the bottom of the outer tub by the water supply means, the drain valve is opened to drain the water used in the final rinsing step, Thereafter, the drain valve is closed and the water supply means supplies water to a predetermined water level higher than the bottom surface of the rotor blade, the inner tank is rotated at a rotation speed higher than the rotation speed of the inner tank in the final rinsing step, A washing machine for cleaning the back surface of the rotor blade. A housing, an outer tub that is supported in an anti-vibration manner and stores water therein, an inner tub that is rotatably supported in the outer tub and stores laundry, and a driving device that rotationally drives the inner tub And a washing machine including a rotary blade disposed on the inner bottom surface of the inner tub and driven to rotate , and water supply means for supplying water into the outer tub,
After performing the rinsing step of spraying rinse water on the laundry in a state where water is accumulated at the bottom of the outer tub by the water supply means, the drain valve is opened to drain the water used in the rinse step, and the rotation When the water level reaches a predetermined level higher than the blade bottom, the drain valve is closed, and the inner tank or the outer tank is rotated at a rotational speed higher than the rotational speed of the inner tank in the rinsing step. Washing machine characterized by washing the bottom of the machine.

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