JP2013223551A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine in which the inside a drain hose is washed to be clean for suppressing the occurrence of mold growth and smell.SOLUTION: A washing machine comprises: an outer tank supported within a housing and holding water therein; an inner tank provided within the outer tank and having laundry placed therein; and a circulation pump for circulating water held in the outer tank, and executes washing, rinsing and spin-drying steps. The washing machine further comprises a first passage extending from a bottom portion of the outer tank to the circulation pump, a second passage extending from the circulation pump to an upper portion of the outer tank, and a third passage extending from the circulation pump to the bottom portion of the outer tank. In the washing step, the circulation pump is normally driven, so that the water held in the bottom portion of the outer tank can be sucked through the first passage and sent through the second passage to be sprinkled from the upper portion of the outer tank into the inner tank. In a time period between the rinsing step and the spin-drying step, the circulation pump is reversely driven, so that the water held in the bottom portion of the outer tank can be sucked through the first passage and sent through the third passage to be circulated to the bottom portion of the outer tank.

Description

  The present invention relates to a washing machine.

  When a general washing machine is used for a long time, dirt and the like adhere to the outer tub for storing washing water and the inner tub for storing clothes. Courses are provided. In addition, focusing on the antibacterial action of metal ions, a technique for suppressing the occurrence of black mold on the surface of the tank by supplying ionic water containing metal ions and causing it to act on the outer tank and the inner tank has also been proposed. ing.

  In Patent Document 1 below, ionic water is retained in the circulating water channel after washing is completed, and antibacterial treatment is performed to prevent molds from being generated in the circulating water channel until the next operation start. It is disclosed.

JP 2011-250847 A

However, in the technique described in Patent Document 1, since ionic water is simply immersed, there are cases where dirt attached to the drainage hose cannot be completely removed when it is easy to wash. And when such dirt accumulates in the bottom part of a drainage hose and time passes, mold and a smell may be generated.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a washing machine in which the inside of the drainage hose is washed away and generation of mold and odor is suppressed.

  In order to achieve the above object, the present invention provides an outer tub that is supported in a housing and stores water therein, an inner tub that is contained in the outer tub and contains clothing, and water that is accumulated in the outer tub. In a washing machine having a circulation pump for circulating water, and having washing, rinsing and dewatering steps, a first flow path from the bottom of the outer tub to the circulation pump, and a first flow path from the circulation pump to the top of the outer tub 2 and a third flow path from the circulation pump to the bottom of the outer tub, and the water accumulated in the bottom of the outer tub by rotating the circulation pump forward during the washing step. Is sucked from the first flow path, water is sprinkled from the upper part of the outer tank into the inner tank through the second flow path, and the circulation pump is reversely rotated between the rinsing process and the dehydrating process. The water collected at the bottom of the outer tub is sucked from the first flow path. , Via the third flow path circulates into the outer tub bottom.

  ADVANTAGE OF THE INVENTION According to this invention, the inside of a drainage hose can be washed away cleanly and the washing machine which suppressed generation | occurrence | production of mold and odor can be provided.

It is a perspective view which shows the external appearance of the drum type washing-drying machine which concerns on 1st Embodiment. It is a side view which shows the internal structure of the drum type washing-drying machine which concerns on 1st Embodiment. It is a perspective view which shows the connection state of a water supply solenoid valve, a washing water supply hose, and a drainage hose. It is a top view which shows arrangement | positioning of the outer tank cover side nozzle of the drum type washing-drying machine which concerns on 1st Embodiment. It is the sectional view on the AA line of FIG. The single unit of an outer tank cover side nozzle is shown, (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a bottom view. It is an expanded sectional view which shows the flow of the water by an outer tank cover side nozzle. It is a top view which shows typically the washing | cleaning range by the outer tank cover side nozzle. It is a block diagram which shows a drum type washing-drying machine. It is a flowchart which shows the main control at the time of operation | movement of a drum type washing-drying machine. It is a flowchart which shows the control in the first half of an automatic cleaning process. It is a flowchart which shows the control in the second half of an automatic cleaning process. It is a flowchart which shows the control in a spin-drying | dehydration process. It is a whole process table | surface which shows the opening / closing operation | movement of the various water supply solenoid valves in the drum type washing-drying machine which concerns on 1st Embodiment. It is a figure which shows arrangement | positioning of the hose in an outer tank lower part periphery. It is a figure which shows the flow of the air of the middle of the drying process in the drum type washing-drying machine which concerns on 1st Embodiment. It is a figure which shows the flow of the air of the drying process last stage in the drum type washing-drying machine which concerns on 1st Embodiment. It is a whole process table | surface which shows the opening / closing operation | movement of the various water supply solenoid valves in the drum type washing-drying machine which concerns on other embodiment. It is a flowchart which shows the control in the automatic cleaning (drainage hose) process of the drum type washing-drying machine which concerns on other embodiment. It is a figure which shows a circulation pump, a filter, and a hose in an outer tank lower periphery. It is a perspective view which shows the shape inside the casing of a circulation pump.

  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 drum-type washing / drying machine (hereinafter referred to as a washing / drying machine) capable of performing steps from washing to drying will be described as an example. Moreover, below, it demonstrates on the basis of the direction when the washing-drying machine S1 is seen from the front.

  As shown in FIG. 1, the washing / drying machine S1 of the first embodiment has a casing 1 whose outer shell is configured by combining a steel plate and a resin molded product, and the casing 1 is mounted on a base 1h. Configured. The housing 1 includes left and right side plates 1a and 1b (not shown), a front cover 1c, a back cover 1d (not shown), an upper cover 1e, and a lower front cover 1f. The left and right side plates 1a and 1b are joined by a U-shaped upper reinforcing material (not shown), a front reinforcing material (not shown), and a rear reinforcing material (not shown), and include the base 1h. A box-shaped housing 1 is formed and has sufficient strength as a housing.

  A door 2 that closes an insertion port for putting in and out clothes (laundry, objects to be dried) is supported at a substantially center of the front cover 1c so as to be openable and closable by a hinge provided in the front reinforcing material. . The front cover 1c in the vicinity of the door 2 is provided with a door release button 3 for releasing the door 2 locking mechanism. When the door release button 3 is pressed, the locking mechanism is released and the door 2 is opened. When the door 2 is pressed against the front cover 1c, the door 2 is locked and closed. A front reinforcing material (not shown) has a circular opening for putting clothes in and out concentrically with an opening of an outer tub 20 (see FIGS. 2 to 5) described later.

  An operation panel 4 having a power switch 4a, operation switches 4b and 4c, a display 4d, and the like is provided at the upper center of the housing 1. The operation panel 4 is electrically connected to a control device 60 (not shown) provided in the housing 1. Further, on the left side of the operation panel 4, a drawer-type tray 5 into which a detergent, a softening agent, or the like is charged is provided.

  In addition, on the right side of the operation panel 4, a pull-out drying filter 6 is provided. The dry filter 6 includes a mesh-type filter so that lint and the like are removed. Cleaning of the dry filter 6 is performed by pulling out the dry filter 6 and taking out a mesh type filter. Further, the top cover 1e is provided with a water supply hose connection port 7a from a water tap and a water absorption hose connection port 7b for remaining hot water in the bath.

  Next, as shown in FIG. 2, the washing / drying machine S <b> 1 is provided with a rotating drum (inner tub) 10 as a cylindrical washing and dewatering tub that is rotatably supported in the housing 1. The rotary drum 10 has an opening for putting clothes in and out on the front side (near side) end face, and a plurality of through holes 10h (see FIG. 7) for water flow and ventilation on the peripheral wall. .

  A balance ring (also referred to as a fluid balancer) 10b integrated with the rotary drum 10 is provided at the edge of the opening. The balance ring 10b is configured by enclosing a fluid having a large specific gravity therein, and when the eccentricity occurs due to the bias of the clothing 30 when the rotary drum 10 rotates, the balance ring 10b is eccentric due to the movement of the fluid in the balance ring 10b. Has the function of canceling and maintaining the balance of rotation.

  A plurality of lifters 10 c extending in the depth direction (axial direction) are provided on the inner peripheral wall of the rotating drum 10. When the rotating drum 10 rotates during washing and drying, the clothes 30 are lifted along the peripheral wall by the lifter 10c and centrifugal force, and are repeatedly moved by gravity. The rotation center of the rotary drum 10 is inclined so that the opening side becomes higher.

  The washing / drying machine S1 includes a cylindrical outer tub 20 that encloses the rotary drum 10 on the same axis and has an open front surface. The outer tub 20 includes an outer tub main body 21 and an outer tub cover 22. An opening 21s (see FIG. 7) on the front surface of the outer tub main body 21 is provided with an outer tub cover 22 made of synthetic resin, which allows water to be stored in the outer tub 20. In the center of the front surface (front side) of the outer tub cover 22, an opening 22a (see FIG. 4) for taking in and out the garment 30 is formed. The opening 22a and the opening provided in the front reinforcing member are connected by a rubber packing 23 (see FIG. 5). The packing 23 plays a role of maintaining the water tightness between the outer tub 20 and the door 2. A drain port 20 c is provided at the bottom bottom of the outer tub 20, and a drain hose 8 is connected thereto.

  The tip of the drain hose 8 is connected to a drain hole 101 provided on the bottom surface outside the machine. A drainage electromagnetic valve V is provided in the middle of the drainage hose 8. Water is stored in the outer tank 20 by closing the drainage electromagnetic valve V and supplying water, and opening the drainage electromagnetic valve V allows the outer tank to open. The water in 20 is discharged out of the machine.

  In the washing / drying machine S <b> 1, a motor M for rotationally driving the rotary drum 10 is attached to the center of the back surface (bottom surface center) of the outer tub 20. The rotating shaft m1 of the motor M passes through the outer tub 20 and is coupled to a metal flange 10e provided on the back surface of the rotating drum 10. Further, the lower part of the outer tub 20 is supported by a plurality of suspensions 9 (consisting of coil springs and dampers) whose lower side is fixed to the base part 1h. The upper portion of the outer tub 20 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member, and is configured to prevent the outer tub 20 from falling in the front-rear direction.

  In addition, the washing and drying machine S1 includes a dehumidification duct 32 extending in the vertical direction inside the back surface of the housing 1 and the back side of the outer tub 20, and an upper duct 33 extending from the rear to the front inside the upper surface of the housing 1 and the upper surface side of the outer tub 20. have. An overflow hose 15 connected so as to merge with the drainage hose 8 on the downstream side of the drainage electromagnetic valve V is connected to the lower portion of the dehumidifying duct 32. The upstream end of the overflow hose 15 is connected so as to be positioned above the bellows 31 described later.

  As shown in FIG. 15, the drainage hose 8 is connected to the bottom of the drainage joint 18 provided at the bottom of the outer tank 20 and the circulation hose 81 connecting the circulation pump P, upstream of the circulation pump P and the drainage solenoid valve V. A valve upstream hose 82 that connects the two sides, a downstream side of the drain electromagnetic valve V, and a valve downstream hose 83. Here, the circulation pump P is connected to the side portion of the outer tank cover 22 via the connection hose 86 and the watering hose 85, and the water stored in the outer tank 20 is sucked from the circulation hose 81. Pumping up and spraying the clothes 30 in the rotating drum 10 from the water spout as a shower.

  Next, the structure of the circulation pump P will be described with reference to FIGS.

  The circulation pump P includes a casing 93, a runner (not shown), and a circulation pump motor 89. The casing 93 is provided with a suction port 94 at the center, a first discharge port 91 and a second discharge port 92 are provided at the outer peripheral portion, and is formed integrally with the filter case 87.

  Here, a water inlet 87 a and a water outlet 87 b and a suction port 94 to the circulation pump P are provided on the back side of the bottom of the filter case 87. The water inlet 87a of the filter case 87 is connected to the drain port 20c of the outer tub 20 by a circulation hose 81 as a first flow path, and the water outlet 87b of the filter case 87 is connected to a drain electromagnetic valve V by a valve upstream hose 82. It is connected with. In addition, a valve downstream hose 83 is connected to the drain electromagnetic valve V so that the drain can be drained out of the machine.

  And the runner is attached to the axis | shaft of the circulation pump motor 89, and the blade | wing is formed in the runner. When the runner is rotated forward, the water flowing in from the suction port 94 flows out from the first discharge port 91 while rotating inside the casing 93 by the centrifugal force of the runner. On the other hand, when the runner rotates in the reverse direction, water flows out from the second discharge port 92.

  The first discharge port 91 is connected to a watering hose 85 attached to the front outer peripheral wall of the outer tank cover 22 via a connection hose 86 as a second flow path. The watering hose 85 installed in the upper part of the outer tub 20 is connected to a nozzle (not shown) provided on the upper side of the outer tub cover 22. This nozzle has a slit shape that spreads water in a thin film shape in the horizontal direction, and sprays washing water into the rotary drum 10.

  The second discharge port 92 is connected to an inlet 88 provided in the recess 20a at the bottom of the outer tub 20 via a detergent-dissolving hose 84 as a third flow path. The inflow port 88 may be provided at any position as long as it is the bottom of the outer tub 20.

  Then, when the circulation pump P is rotated forward with the drain electromagnetic valve V closed, the washing water in the outer tub 20 passes through the circulation hose 81 from the drain port 20c, and foreign matter is removed by the filter 87c, and enters the circulation pump P. The water is discharged from the first discharge port 91, passes through the connection hose 86 and the watering hose 85, and is sprayed from the nozzle into the rotary drum 10.

  On the other hand, when the circulation pump P is rotated in the reverse direction, the washing water in the outer tub 20 passes through the circulation hose 81 from the drain port 20c and is removed by the filter 87c, enters the circulation pump P, and is discharged from the second discharge port 92. And circulates back from the inlet 88 into the outer tub 20.

  When the drainage electromagnetic valve V is opened, the washing water in the outer tub 20 passes through the filter 87c, passes through the valve upstream hose 82, passes through the drainage electromagnetic valve V, and is discharged from the valve downstream hose 83 to the outside of the machine.

  A blower fan unit including a fan 41 (blower unit) and a heater 42 (heating unit) is provided on the downstream side of the upper duct 33. A hot air outlet 37 is attached to the downstream side of the fan unit via a bellows 36, and the tip of the hot air outlet 37 has a slit shape. The upper duct 33 has an intake valve 13 on the lower surface on the outer tank 20 side, upstream of the fan 41.

  In the present embodiment, the area of the hot air outlet 37 is made smaller than the area of the air passage such as the dehumidifying duct 32 and the upper duct 33, and the motor of the fan 41 is rotated at a high speed to generate high-pressure air. . As a result, a high-speed wind, for example, a wind of 50 m / s or more is blown into the drum from the warm air outlet 37, and this high-speed wind is blown to the clothing, so that wrinkles generated in the clothing can be stretched by the wind force. .

  Here, the fan 41 is a so-called turbo fan or the like, and has an electric motor, an impeller, and a fan case containing the impeller. The impeller includes a front plate having a suction port at the center, a rear plate fixed to the rotating shaft of the electric motor, and a plurality of blades provided between the front plate and the rear plate. These blades are arranged so as to recede from the center side toward the outer diameter side in the direction opposite to the rotation direction. In addition, since the impeller is made of metal, the impeller can be reduced in size and weight, and unbalance is reduced. Therefore, even when high-speed wind is blown, vibration and noise can be reduced.

  In the dehumidifying duct 32, as a water-cooled dehumidifying mechanism, a heat exchange plate (not shown) having a large number of protrusions is disposed. The heat exchange plate has cooling water along its wall surface. A water supply pipe 34 for flowing the water is connected. And water cooling dehumidification functions by opening the cooling water feed electromagnetic valve 12d mentioned later. Further, the lower part of the dehumidifying duct 32 is connected in a substantially horizontal direction by a bellows 31 having a flexible structure to a vent hole 20 d provided at the lower back of the outer tub 20. On the other hand, the downstream side of the heater 42 and the hot air outlet 37 are connected in a substantially vertical direction by a bellows 36 having a flexible structure on the front side of the outer tub 20, so that the entire vibration of the outer tub 20 is absorbed. It is possible.

  Next, a water supply unit 12 (water supply means) including five water supply electromagnetic valves T, a bath water supply pump U, a water supply path unit (not shown), and the like is provided behind the tray 5 (see FIG. 1). It has been. The five water supply electromagnetic valves T include a detergent water supply electromagnetic valve 12a, a finishing agent (softener) water supply electromagnetic valve 12b, an outer tank water supply electromagnetic valve 12c, a cooling water supply electromagnetic valve 12d, and a tank cleaning water supply electromagnetic valve 12e ( Water supply means).

  The detergent water supply solenoid valve 12a supplies tap water from the water supply hose connection port 7a to a detergent charging chamber (not shown) of the tray 5 through a water supply path (not shown). The tap water poured into the detergent charging chamber is poured into the outer tub 20 through a charging hose (not shown) together with the charged detergent.

  The finishing agent water supply electromagnetic valve 12b supplies tap water from the water supply hose connection port 7a to a finishing agent charging chamber (not shown) of the tray 5 through a water supply path (not shown). The tap water poured into the finishing agent charging chamber is poured into the outer tub 20 through the charging hose together with the finished finishing agent.

  The outer tank water supply electromagnetic valve 12c supplies tap water from the water supply hose connection port 7a into the outer tank 20 through a water supply path (not shown) from a water injection hose (not shown).

  The cooling water supply electromagnetic valve 12d supplies tap water from the water supply hose connection port 7a to the water cooling and dehumidifying mechanism of the dehumidifying duct 32 (see FIG. 2) through a water supply path (not shown).

  The tank cleaning water supply electromagnetic valve 12e passes the tap water from the water supply hose connection port 7a through a water supply path (not shown), and the outer tank cover side nozzle 50A (described later) via a cleaning water supply hose 55 (cleaning water supply piping). Water is supplied to the water channel member.

  In addition, the bath water from the water absorption hose connection port 7b pumped up by the bath water feed pump U is supplied into the outer tub 20 from the water injection hose through a water supply path (not shown).

  As shown in FIG. 3, the five water supply solenoid valves T are arranged on the upper left side of the outer tub 20. FIG. 3 shows a state where only five water supply electromagnetic valves T are extracted from the water supply unit 12.

  A branch joint 54 is connected to a discharge port (not shown) of the tank cleaning water supply electromagnetic valve 12e via a seal member (such as an O-ring) (not shown), and one end of a cleaning water supply hose 55 is connected to the tip of the branch joint 54. Is connected, and a drain hose 56 (drain pipe) is connected to the side surface (circumferential surface) of the branch joint 54.

  The cleaning water supply hose 55 extends forward along the outer tub main body 21, extends so as to be bent in the center in the left-right direction at the position of the outer tub cover 22, and is provided at the apex (center) of the outer tub cover 22. Further, it is connected to a water supply port 50f1 (see FIG. 4) described later via a seal member (not shown).

  The drain hose 56 extends downward from the branch joint 54 and extends while being bent backward, and is connected to the outer tank water supply joint 24 provided at the rear portion of the outer surface of the outer tank 20 (outer tank main body 21). The outer tank water supply joint 24 is connected to a case communicating with the detergent charging chamber and the finishing agent charging chamber of the tray 5 via a bellows hose (not shown).

  As shown in FIG. 4, an outer tank cover side nozzle 50 </ b> A for spraying tap water (cleaning water) for tank cleaning is provided on the front side of the outer tank cover 22. The outer tank cover side nozzle 50 </ b> A is formed of a synthetic resin or the like, has a substantially arcuate shape (arc shape), and is provided in the upper part of the outer tank cover 22. The outer tank cover side nozzle 50A is formed with a length of about one quarter of the circumference, and extends from the center to the left and right with the same length. In addition, a water supply port 50f1 to which the cleaning water supply hose 55 (see FIG. 5) is connected is formed at the center of the outer tank cover side nozzle 50A in the circumferential direction, and penetrates the outer tank cover 22 to enter the outer tank cover. 22 protrudes outside. A seal member (not shown) such as an O-ring is provided at the boundary between the outer tub cover 22 and the water supply port 50f1 so that water does not leak.

  As shown in FIG. 5, the shape of the outer tank cover 22 to which the outer tank cover side nozzle 50 </ b> A is attached has a large diameter portion 22 b connected to the opening 21 s (FIG. 7) of the outer tank main body 21 (see FIG. 7), The large-diameter portion 22b includes an inclined portion 22c that is reduced in diameter toward the front side (front), and a front surface portion 22d that extends in a substantially vertical direction with respect to the inclined portion 22c. Further, a convex portion 22e to which the packing 23 is attached is formed on the front surface portion 22d so as to protrude forward. The outer tank cover side nozzle 50 </ b> A is disposed at the front end of the large diameter portion 22 b of the outer tank cover 22.

  As shown in FIG. 6 (a), a plurality (15 in this embodiment) of water spray ports 50b2 are formed on the front surface 50d of the outer tank cover side nozzle 50A at intervals in the circumferential direction. Moreover, the hole diameter (diameter) of the water spray port 50b2 is formed to be 1.2 mm, for example. Note that the number, position, and hole diameter of the water spout 50b2 are not limited to the present embodiment, and can be changed as appropriate.

  As shown in FIGS. 6B and 6C, a plurality of mounting portions 51A are formed on the upper surface 50e of the outer tank cover side nozzle 50A so as to protrude rearward from the upper surface 50e at intervals in the circumferential direction. ing. The mounting portion 51A has a rectangular piece 51a, and is configured by forming a screw insertion hole 51b in the piece 51a. Each attachment portion 51A is formed so as to be flush with the upper surface 50e, and a screw (not shown) is inserted into the insertion hole 51b and is screwed to the inner wall surface 22b1 of the outer tank cover 22.

  As shown in FIG. 6D, a water spray port 50a2 is formed on the bottom surface 50f of the outer tank cover side nozzle 50A at a position corresponding to the water supply port 50f1. In the present embodiment, only one water spout 50a2 is provided, but it may be provided at a plurality of locations.

  As shown in FIG. 7, the outer tank cover side nozzle 50 </ b> A is disposed between the outer tank cover 22 (outer tank 20) and the side surface (circumferential surface) of the rotary drum 10. More specifically, the rotary drum 10 has a throttle portion 10d having a reduced diameter at the front end, and the outer tank cover side nozzle 50A is positioned between the large diameter portion 22b of the outer tank cover 22 and the throttle portion 10d. doing. A balance ring 10b is attached to the inner peripheral edge of the throttle portion 10d.

  In the washing / drying machine S1 provided with the outer tub cover side nozzle 50A in this way, as shown by the solid line arrow R1 in FIG. 7, the washing water is discharged forward from the water spray port 50b2, and the inclined portion 22c of the outer tub cover 22 is discharged. Hits the inner wall surface 22c1 and flows downward along the inner wall surface 22c1.

  More specifically, the cleaning water discharged from the water spray port 50b2 is discharged linearly, hits the inner wall surface 22c1, and after hitting, spreads radially around the position. The washing water sprayed on the inner wall surface 22c1 flows down the inner wall surface 22c1 of the inclined portion 22c of the outer tub cover 22 and the inner wall surface 22d1 of the front surface portion 22d by the action of gravity.

  Further, the washing water discharged from the water spray port 50a2 hits the throttle portion 10d of the rotary drum 10 as indicated by the solid line arrow R2. The washing water sprayed on the throttle portion 10d is scattered on the inner wall surface 22b1 of the large-diameter portion 22b of the outer tank cover 22 (outer tank 20) by the centrifugal force when the rotary drum 10 rotates, and behind the throttle portion 10d. Scattered on the inner surface of the outer tank cover 22 and the outer peripheral surface 10 s of the rotating drum 10. In addition, although there is one sprinkling port 50a2 sprayed to the rotating drum 10, the water can be sprayed over the entire peripheral surface of the throttle portion 10d of the rotating drum 10 by sprinkling water while rotating the rotating drum 10. become. In this way, the amount of water used can be reduced by blowing away tap water by centrifugal force and washing the inside of the outer tub cover 22 as compared with the case where the tap water is blown and washed.

  As shown in FIG. 8, when the cleaning water discharged from each water spout 50b2 (see FIG. 6) of the outer tank cover side nozzle 50A to the front (inner wall surface 22b1) of the outer tank cover 22 is scattered radially, In the horizontal direction perpendicular to the vertical direction (gravity direction), the washing water from the adjacent water spouts 50b1 overlap each other. Thereby, when the cleaning water flows down, it is possible to eliminate the areas where the cleaning water does not flow in the inner wall surfaces 22c1 and 22d1 of the outer tub cover 22, and it is possible to prevent the dirt from remaining in the form of vertical stripes. .

  The number, the hole diameter, and the position of the water spray port 50b1 of the outer tank cover side nozzle 50A described above may be set so that the cleaning water flows over the entire inner surface of the outer tank cover 22, as described with reference to FIG. For example, the number, hole diameter, and position can be changed as appropriate.

  Next, the operation of the washing / drying machine S1 of the present embodiment will be described. First, the overall configuration of the washing / drying machine S1 of the present embodiment will be briefly described. As shown in FIG. 9, the control device (microcomputer) 60 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) storing a program, a RAM (Random Access Memory), an input / output circuit, and the like. The operation button input circuit 62 connected to the switches 4b and 4c, the water level sensor 63, the temperature sensor 64, and the vibration sensor 65 are connected to acquire various information signals in the user's button operation, washing process, and drying process. The temperature sensor 64 includes an outside air temperature sensor that detects the outside air temperature, a temperature sensor that detects the temperature of the drain port 20c, and the like. Moreover, the vibration sensor 65 is provided in the lower part of the outer tank 20, and detects the vibration by imbalance.

  In addition, the control device 60 is connected to each water supply electromagnetic valve 12a to 12e, the bath water supply pump U, the drainage electromagnetic valve V, the rotation speed of the motor M (the rotation speed of the rotary drum 10), and the fan 41 via each drive circuit 66. And the heater 42 energization (ON / OFF) are controlled. The control device 60 controls the display 4d, the light emitting diode 67, and the buzzer 68 for notifying the user of the operation state of the washing / drying machine S1.

  The control device 60 is activated when the power switch 4a is pressed and the power is turned on, and executes, for example, a basic control processing program for washing and drying shown in FIGS. In the following, a case where a series of operations from washing to drying is performed will be described with reference to FIGS.

  As shown in FIG. 10, the control device 60 includes a washing process (step S100), a rinse process (step S200), a rinse process (step S300), an automatic cleaning process (step S400), a dehydration process (step S500), A drying process (step S600) is performed in order.

  As shown in FIG. 14, in the cloth amount sensing step (S101) of the washing step (S100), the control device 60 rotates the rotary drum 10 and calculates the cloth amount for the garment 30 before water injection. Note that the weight of the garment 30 in the rotary drum 10 can be calculated based on the rotational speed of the motor M and the current value. As the weight of the garment 30 increases, the load for rotating the rotary drum 10 increases, and a large amount of motor current flows through the motor M. Therefore, the weight of the garment 30 is determined by the motor current and the rotation speed of the motor M. Can be calculated.

  In the detergent melt water supply step (S102), the control device 60 opens the detergent water supply electromagnetic valve 12a and supplies tap water to the detergent charging chamber of the tray 5. The tap water poured into the tray 5 is poured into the outer tub 20 through the bellows hose (not shown) and the outer tub water supply joint 24 while dissolving the detergent. In addition, if the control apparatus 60 supplies water to a detergent melt | dissolution water level, the detergent water supply electromagnetic valve 12a will be closed and water supply will be stopped. Next, the circulation pump motor 89 is energized, and the circulation pump P is rotated in the reverse direction to dissolve the detergent. As shown in FIGS. 20 and 21, the water and the detergent accumulated in the bottom portion and the recess portion of the outer tub 20 enter the casing 93 from the drain port 20 c through the circulation hose 81 and the filter 87 c and from the suction port 94. And it discharges from the 2nd discharge port 92, circulates through the detergent melt hose 84, and returns from the inflow port 88 to the hollow part 20a. The detergent is stirred and dissolved by the blades of the runner, and washing water having a high detergent concentration is generated.

  In the rotary water supply step (S103), the control device 60 drives the circulation pump P while rotating the rotary drum 10 while maintaining the opening of the detergent water supply electromagnetic valve 12a, thereby washing water (high concentration detergent). The solution is circulated and water is supplied to the clothes 30 while spraying the washing water. Here, the rotating drum 10 is rotated at a predetermined rotational speed. Moreover, the control apparatus 60 closes the detergent water supply solenoid valve 12a after completion | finish of rotation water supply.

  In the pre-washing step (S104), the control device 60 washes the clothes with a high-concentration detergent solution. In this pre-washing, washing water at the bottom of the outer tub 20 is sprinkled from the nozzle onto the clothing by rotating the circulating pump P forward and backward while rotating the rotating drum 10 forward and backward.

  In the cloth quality sensing step (S105), the control device 60 calculates the weight of the garment 30 including water. Then, the control device 60 calculates the cloth quality (water absorption) of the clothes 30 from the weight of the clothes 30 calculated in the cloth amount sensing step (S101) and the weight of the clothes including water calculated in the cloth quality sensing step (S105). Gender). The following steps are executed according to the determined cloth quality of the clothing.

  In the replenishing water step (S106), the control device 60 matches the weight of the clothing 30 calculated in the cloth amount sensing step (S101) and the fabric quality of the clothing 30 determined in the fabric quality sensing step (S105). The water supply electromagnetic valve 12 c and the tank cleaning water supply electromagnetic valve 12 e are opened to supply water into the outer tank 20. For example, if it is a thing with high water absorption, such as towel cloth, wash water is replenished in a replenishment water process. In addition, after the end of water supply, the control device 60 closes the outer tank water supply electromagnetic valve 12c and the tank cleaning water supply electromagnetic valve 12e. In this replenishing water process, by opening the tank cleaning water supply electromagnetic valve 12e, the cleaning water is sprinkled from the outer tank cover side nozzle 50A, and the upper part of the outer tank cover 22 and the rotary drum 10 of the rotating drum 10 are sprayed in the previous cleaning process. The detergent component adhering to the front end side surface can be poured.

  In the main washing step (S107), the control device 60 washes the clothes 30 while rotating the rotary drum 10 in both forward and reverse directions. At this time, the circulation pump P is rotated forward to draw up the washing water accumulated at the bottom of the outer tub 20 and spray the clothes into the rotary drum 10. When the main washing is completed, the unbalanced state of the garment 30 is monitored to determine whether or not to shift to dehydration.

  Next, the first rinsing step (S200) is entered. First, in the draining step (S201), the control device 60 opens the drain electromagnetic valve V and drains the washing water in the outer tub 20. The end of drainage is determined based on the detection value of the water level sensor.

  In the dehydration step (S202), after the drainage is completed, the control device 60 rotates the rotary drum 10 at a high speed to dehydrate the wash water contained in the clothing 30. Note that the rotational speed of the rotating drum 10 during dehydration is set to, for example, 1000 r / min or more.

  In the rotary shower step (S203), the control device 60 closes the drain electromagnetic valve V and opens the outer tank water supply electromagnetic valve 12c while rotating the rotary drum 10 at a low rotation speed (for example, 100 r / min or less). Then, rinse water is supplied to the outer tub 20. The rinsing water is sprayed from the fresh water shower nozzle provided on the upper part of the outer tub cover 22 to the clothes in the rotary drum 10 using the water pressure.

  In the dehydration step (S204), the control device 60 stops the circulation pump P while rotating the rotary drum 10 at a high speed to dehydrate the rinse water from the clothing 30.

  In the rotary shower process (S205), the control device 60 opens the outer tank water supply electromagnetic valve 12c while rotating the rotary drum 10, and rinses water from the fresh water shower nozzle, as in the rotary shower process (S203). Is sprayed on the clothes 30 in the rotary drum 10.

  Subsequently, the second rinsing process (S300), which is the final rinsing process, is entered. First, in the draining step (S301), the control device 60 stops the rotary drum 10 and the circulation pump P, opens the drain electromagnetic valve V, and drains the rinsing water in the outer tub 20.

  In the dehydration step (S302), the control device 60 dehydrates water (rinse water) contained in the clothing 30 by rotating the rotary drum 10 at a high speed after the drainage is completed.

  In the water supply step (S303), the control device 60 closes the drain electromagnetic valve V, opens the tank cleaning water supply electromagnetic valve 12e, and rotates the circulation pump P forward while supplying rinse water to the outer tank 20. To do. The control device 60 closes the tank cleaning water supply electromagnetic valve 12e after the end of water supply. In the water supply process, the tank cleaning water supply electromagnetic valve 12e is opened to supply water, so that dirt attached to the upper part of the outer tank cover 22 and the like can be poured during the rinsing process.

  In the finishing agent (softener) water supply step (S304), the control device 60 opens the finishing agent water supply electromagnetic valve 12b and supplies the outer tub 20 with rinse water containing the finishing agent. The control device 60 closes the finishing agent water supply electromagnetic valve 12b after finishing the finishing agent water supply.

  In the rotary water supply / replenishment water process (S305), the control device 60 opens the outer tank water supply electromagnetic valve 12c and the tank cleaning water supply electromagnetic valve 12e, and supplies the rinsing water into the outer tank 20 while supplying the circulation pump P. It rotates forward. In addition, when clothes with high water absorption are thrown in and water supply amount is insufficient, rinse water is replenished. In addition, the control device 60 rinses the clothes 30 by rotating the rotary drum 10 while rinsing water is accumulated in the outer tub 20. In addition, the rotational speed of the rotating drum 10 at this time is set to 35 to 45 r / min.

  Next, details of the automatic cleaning process (S400) will be described with reference to FIGS.

  First, in the residual water starting step (S401), the rotational speed of the rotating drum 10 is increased as it is without draining the water accumulated in the outer tub 20 by the rinse 2. Then, the control device 60 sets the rotary drum 10 to a rotational speed 80 that is higher than the rotational speed (for example, 25 r / min) during the washing process and lower than the rotational speed (for example, 1000 r / min) during the dehydration process. ˜300 r / min. However, when a protrusion is provided on the back surface of the rotating drum 10 to form a water scraping portion, the water easily rolls up, and the outside of the rotating drum 10 and the inside of the outer tub 20 can be sufficiently washed. It may be lower than the rotation speed.

  In the present embodiment, the first tank cleaning rotation speed is rotated clockwise at 100 r / min. The tank cleaning here is a provisional cleaning process that mainly removes large dirt at the bottom of the tank, and therefore, rinse water is used instead of clean water, and the rotation speed of the rotary drum 10 is reduced. Is set. The water level at this time is the same water level (first tank washing water level) as that after the rotation water supply / replenishment water process (S305) in the above-described rotation water supply / replenishment water process. Although it is different, the water level is at the maximum when 11.5 liters of water (first tank washing water amount) is supplied. Then, the rotating drum 10 rotates, and the wash water (tap water) stored at the bottom of the outer tub 20 is rolled up, whereby the inner left half region of the outer tub 20 on the side where the water is rolled up and the rotating drum The left half area of 10 is mainly cleaned.

  Subsequently, the control device 60 determines whether or not a predetermined time has elapsed since the rotating drum 10 is rotated to the right by a timer (not shown). The predetermined time is not particularly limited, and is set to 60 seconds, for example. Thereafter, the control device 60 rotates the rotating drum 10 counterclockwise at a predetermined time of 100 r / min. As a result, the cleaning water stored in the outer tub 20 is rolled up in the same way as in the right rotation, and the right half area inside the outer tub 20 and the right half area of the rotating drum 10 are mainly washed. .

  By performing such tank cleaning, it is possible to suppress dirt and dust remaining on the outer peripheral wall surface of the rotating drum 10 and the inner peripheral wall surface of the outer tank 20. In addition, by rotating the rotating drum 10 clockwise and counterclockwise, it is possible to prevent occurrence of bias in the area to be cleaned.

  Then, when entering the draining step (S402), the control device 60 performs drainage by opening the drain electromagnetic valve V while maintaining the rotation of the rotary drum 10 (left rotation, 100 r / min) as it is. As a result, the used cleaning water in the outer tub 20 used in the tub cleaning is discharged out of the machine via the drainage hose 8. Whether or not the drainage is completed can be determined based on the detection value of the water level sensor 63.

  When drainage is completed, the rotational speed of the rotary drum 10 is increased, and the rotational speed of the rotary drum 10 is set to about 380 r / min. At this time, when the degree of dehydration is confirmed by the conductivity sensor and it is detected that the moisture contained in the clothing 30 has decreased to a certain level, the rotational speed of the rotary drum 10 is reduced. In addition, although the electrical conductivity sensor in this embodiment is not shown in figure, it is comprised with a pair of electrode which mutually faces, and it is possible to measure the hardness of the water between this electrode. Moreover, since this electrical conductivity sensor is arrange | positioned in the lower side surface vicinity of the outer tank 20, even if it is in the state which drainage progressed and the water in the outer tank 20 became little, it can detect a dehydration degree with sufficient sensitivity. .

  After the dehydration state is detected by the conductivity sensor, the rotation speed of the rotary drum 10 is reduced to about 240 r / min, which is the second tank cleaning rotation speed, and the tank cleaning shower 1 (S403), which is a further tank cleaning process. ) Starts. In the tank cleaning at this time, as shown in FIG. 12, the control device 60 closes the drain electromagnetic valve V, opens the tank cleaning water supply electromagnetic valve 12 e, and accumulates cleaning water in the outer tank 20. The rotational speed of the rotary drum 10 is maintained at 240 r / min even when cleaning water is stored. The time for storing the washing water varies depending on the tap water pressure. The tap water pressure is determined based on the relationship between the initial water supply amount and time, the water supply time that matches the water pressure is selected, and water is supplied by time control. Here, by supplying about 7 liters of washing water as the second tank washing water amount, water is accumulated up to a second tank washing water level of about 25% of the bottom surface height of the rotary drum 10. This is because, under the condition where the rotational speed of the rotary drum 10 is 240 r / min, if the amount of cleaning water is about 7 liters, the cleaning water can flow over the entire inner surfaces of the outer tub 20 and the outer tub cover 22.

  By this operation, the water accumulated in the lower part of the outer tub 20 is swept up by unevenness such as a dewatering hole existing outside the rotating drum 10 and lifts up along the bottom and side surfaces of the outer tub 20. Moreover, since the second tank cleaning rotational speed 240 r / min is higher than the rotational speed at the time of tank cleaning in the residual water activation (S 401), the second tank cleaning rotational speed 240 r / min is not reached by the tank cleaning in the residual water activation (S 401). Can scoop up water and wash away dirt that cannot be removed by washing the tank when the residual water is activated. Moreover, the dust on the upper part of the outer tub 20 and the upper part of the outer tub cover 22 attached during the previous drying operation can also be washed away by this tub cleaning. In addition, unlike the rinse water used for washing the tank when the residual water is activated, fresh water is used, so that it is possible to prevent adhesion of powder stains and the like.

  Further, in the tank cleaning here, an operation of supplying water from the tank cleaning water supply electromagnetic valve 12e to the outer tank cover side nozzle 50A via the cleaning water supply hose 55 is also performed. Then, water is discharged from a water spray port 50b2 provided on the front surface 50d side of the outer tank cover side nozzle 50A, water is applied to the inner wall surface of the outer tank cover 22, and provided on the bottom surface 50f side of the outer tank cover side nozzle 50A. Water is discharged from the water sprinkling port 50 a 2 and water is applied to the side wall surface of the inner tank 10. The water sprayed on the side wall surface of the rotating drum 10 scatters outward in the circumferential direction due to the centrifugal force generated by the rotation of the rotating drum 10, and reaches the inner wall surface behind the outer tank cover 22 and the outer wall surface of the rotating drum 10.

  As described above, in this embodiment, using the shower sprinkled by the outer tank cover side nozzle 50A, it is difficult for dirt to remain inside the outer tank cover 22 and the like. About the area | region near the inner wall surface in the high position of 20 back, as above-mentioned, the adhesion of dirt is prevented by raking the water collected by the lower part of the outer tank 20 upwards.

  In addition, although this embodiment is a system which wash | cleans sebum dirt, a detergent residue, etc. automatically by combining the shower by the outer tank cover side nozzle 50A, and the scooping of the water stored in the outer tank 20, Even if the shower by the cover side nozzle 50A is not used, the effect of washing away dirt and the like can be expected to some extent. In that case, a water supply valve other than the tank cleaning water supply electromagnetic valve 12e may be used for water supply into the outer tank 20. However, if the operation is performed with a valve having a small water supply flow rate, such as the finishing agent water supply electromagnetic valve 12b and the cooling water supply electromagnetic valve 12d, the water supply time increases, resulting in a longer operation time. 12a and the outer tank water supply electromagnetic valve 12c are desirable.

  Next, when sufficient cleaning water is supplied into the outer tank 20, the tank cleaning water supply electromagnetic valve 12e is closed and the circulation pump P is rotated in the reverse direction. Then, as shown in FIGS. 20 and 21, the water accumulated in the bottom portion and the recess portion of the outer tub 20 enters the casing 93 from the drain port 20 c through the circulation hose 81 and the filter 87 c. And it discharges from the 2nd discharge port 92, circulates through the detergent melt hose 84, and returns from the inflow port 88 to the hollow part 20a. The water circulating as shown by the arrow A in FIG. 15 is less contaminated than the water in the washing process and the rinsing process. By circulating this water, the circulation hose 81 and the detergent-dissolving hose 84 are changed depending on the momentum of the flow. Sebum dirt and detergent residue deposited on the bottom surface is scraped off, and in particular, substances adhering to the groove portion of the bellows are washed away, and the generation of odor and mold is suppressed. For cleaning the circulation hose 81 and the like, the rotation speed of the circulation pump P is set to 2000 r / min or higher (for example, 2500 r / min), which is higher than the rotation speed in the detergent-dissolving water supply step (S102). desirable. However, as compared with the case where the circulation pump P is rotated forward in order to spray water into the rotary drum 10 as a circulation shower, a lower rotation speed is sufficient.

  At this time, the second tank cleaning rotational speed of the rotary drum 10 is maintained as it is (30 seconds), and the water collected in the outer tank 20 continues to be swept up, resulting in a bias in the area to be cleaned. Is prevented. In this embodiment, the rotation drum 10 is rotated only in one direction at the second tank cleaning rotation speed so as not to increase the operation time. However, the rotation direction is reversed after a predetermined time has elapsed, or these are repeated a plurality of times. It is also possible to control to reduce washing unevenness.

  Thereafter, in the drainage (exhaust) step (S404), while maintaining the rotational speed of the rotary drum 10, the drainage electromagnetic valve V is opened to drain the wash water and the fan 41 is 6000 r / min or more, preferably 10000 r / min or more. Rotate at high speed. At this time, by opening the intake valve 13 provided in the upper duct 33, the external air sucked from the lower space of the base 1h enters the rotary drum 10 through the fan 41 from the hot air outlet 37. Then, it reaches the drainage hose 8 via the drainage port 20c. The intake valve 13 is not limited to the intake valve 13 as long as it has a structure capable of taking in external air.

  If the water is simply drained, the water level gradually decreases, but dirt or the like tends to remain at the bottom of the drainage hose 8. Since they flow together vigorously, it is possible to prevent the substances that cause odors from adhering to the drainage hose 8.

  Further, the diameter of the overflow hose 15 is made smaller than that of the drainage hose 8, for example, the diameter of the narrowest part of the overflow hose 15 is the narrowest part of the drainage hose 8 (circulation hose 81 and valve upstream hose 82 in FIG. 15). By making it smaller than the diameter, it is possible to prevent the air generated by the fan 41 from leaking into the overflow hose 15 and to increase the momentum of the air flowing through the drainage hose 8. In this case, the rotational speed of the fan 41 may be lower than that described above. Further, as the fan 41 is operated, heating means such as the heater 42 may be operated.

  Then, when a predetermined time has elapsed after opening the drain electromagnetic valve V, the drain cleaning is completed, and the tank cleaning shower 2 (S405), which is yet another tank cleaning process, is performed with the rotational speed of the rotary drum 10 maintained. Start the operation. At this time, first, the control device 60 closes the intake valve 13 to stop the rotation of the fan 41, closes the drain electromagnetic valve V again, reopens the tank cleaning water supply electromagnetic valve 12e, and is about 2.5 liters. Supply tap water. This 2.5 liter cleaning water amount (third tank cleaning water amount) is the entire inside of the outer tank cover 22 under the condition that the rotational speed of the rotary drum 10 is 240 r / min (same as the second tank cleaning water amount). Although it is difficult to spread, the amount is such that the washing water can flow over the entire inner bottom surface of the outer tub 20. As described above, since the bottom surface inside the outer tub 20 where dirt easily adheres is repeatedly washed with clean water, the dirt can be surely removed. In addition, since the amount of water used at this time is smaller than the amount of the second tank washing water, it also leads to water saving. In the tank cleaning process here, water is supplied from the tank cleaning water supply electromagnetic valve 12e to the outer tank cover side nozzle 50A, and water is sprayed to the outer tank cover 22 and the like.

  Next, when sufficient cleaning water is supplied into the outer tank 20, the tank cleaning water supply electromagnetic valve 12e is closed, and the circulation pump P is reversely rotated at 2000 r / min or more. Then, similarly to the tank washing shower 1 (S403), after the water accumulated in the bottom and the depression of the outer tank 20 reaches the circulation pump P from the drain port 20c via the circulation hose 81 and the filter 87c. Then, it is circulated so as to return to the bottom of the outer tub 20 through the detergent-dissolved hose 84. The circulating water is less contaminated than the circulating water in the tank washing shower 1 (S403), and the circulating hose 81 and the detergent melted hose 84 can be washed more cleanly. In this embodiment, the hose is cleaned by the circulation pump P in both the tank cleaning shower 1 (S403) and the tank cleaning shower 2 (S505). However, even if only one of the processes is performed. I do not care.

At this time, the second tank cleaning rotation speed of the rotating drum 10 is maintained as it is (30 seconds), and the tank cleaning by the water scooping up in the outer tank 20 is continued.
And if predetermined time passes, it will begin a dehydration process (S500). As shown in FIG. 13, first, in the draining process (S501), the drainage electromagnetic valve V is opened and the washing water is drained while the rotational speed of the rotary drum 10 is maintained. When the drainage is completed, the process proceeds to the dehydration process (S502). After the final dehydration process is executed for a predetermined time, the process proceeds to the drying process (S600) with the drainage electromagnetic valve V open.

  Thus, when shifting from the automatic cleaning process (S400) to the dewatering process (S500), the operation time can be shortened by shifting to the dewatering while maintaining the rotation of the rotary drum 10. That is, if the rotation of the rotary drum 10 is stopped before dehydration, it is necessary to increase the rotation speed while balancing the rotary drum 10 when dehydration is started. It will take time to rise. By preventing the rotation of the rotating drum 10 from being stopped in the automatic cleaning process as in this embodiment, the above-described balancing time can be omitted, and the operation time can be shortened.

  It should be noted that the dehydration rotation speed of the rotary drum 10 in the final dehydration step may be appropriately set by the user using the operation panel 4. For example, by setting the maximum dehydration rotation speed to 1000 r / min or more, the moisture content of the clothing 30 can be reduced, and the room drying time can be shortened when the laundry is air-dried. It becomes possible to use (wear) the laundry quickly. On the other hand, for example, by setting the maximum dehydration speed to 700 r / min or less, the dehydration rate of the garment 30 can be lowered, and the occurrence of dewatering wrinkles in clothing that tends to wrinkle, such as Y-shirts, can be reduced. As a result, labor for ironing can be reduced, and power consumption can be reduced. Further, by rotating the rotary drum 10 at a high speed in the final dehydration step, the moisture contained in the clothing 30 is squeezed out and sprayed vigorously on the inner wall surface of the outer tub 20 through the through hole 10h of the rotary drum 10. Therefore, it is possible to prevent dirt and the like from adhering to the inner wall surface of the outer tub 20.

  Next, the operation in the drying step (S601) will be described.

  First, from the first half of the drying process, in the middle stage, as shown in FIG. 16, the rotary drum 10 is rotated with the drain electromagnetic valve V opened, and the fan 41 is operated to suck out the air in the outer tub 20 from the air vent 20d. Then, after passing through the dehumidifying duct 32 and water-cooled dehumidifying, it is heated by the heater 42 to generate the circulating air 17 that is blown from the hot air outlet 37 toward the clothing 30 in the rotary drum 10. The dehumidification of the circulating air 17 that has taken moisture from the clothes 30 in the rotary drum 10 is performed by opening the cooling water supply electromagnetic valve 12d and causing the cooling water 52 flowing out from the supply pipe 34 to the wall surface in the dehumidifying duct 32 to flow down. This is realized by touching the air 17. The cooling water 52 that has flowed out to the wall surface in the dehumidification duct 32 is discharged by the drainage hose 8 through the drainage port 20c.

  In the latter half of the drying process, as shown in FIG. 17, the intake valve 13 is operated to close the circulation air passage, and the external air 16 is sucked from the gap below the base 1h. The sucked external air 16 is heated while receiving exhaust heat from the outer tub 20, the motor M, and the fan 41 while flowing through the side surface of the outer tub 20, and is accumulated in the upper surface of the outer tub 20 and the space of the casing 1 until the middle of drying. The air is sucked into the fan 41 together with the high temperature air 15 inside the casing. At this time, the heater 42 is turned off and the cooling water 52 is stopped. The sucked internal air 15 is blown to the clothing 30, takes moisture from the clothing 30, gets wet, passes through the drainage hose 8 from the drainage port 20 c, breaks the water seal of the drainage trap 19, and is discharged to the drainage port 39. The In the case of a general drain trap, since the water seal height is about 50 to 80 mm, the pressure on the drain hose 8 side is required to be about 1000 Pa or more to break the water seal.

  After the drying process is finished, the pressure on the drainage hose 8 side is kept higher than the pressure on the drainage hole 101 side, the water is supplied at a pressure level that does not break the water seal, and the fan 41 is rotated to recover the water seal of the drain trap 19. To finish drying.

  According to the above-described embodiment, the outer surface of the rotating drum 10 and the outer tub are washed by the tank cleaning in the automatic cleaning process (S400) between the start of the two rinsing steps (S300) and the end of the dehydration step (S500). Dirt etc. adhering to the inner surface of 20 is removed, and the growth of mold and the generation of a strange odor can be suppressed. Further, in the drainage hose cleaning in the automatic cleaning process (S400), dirt accumulated in the drainage hose 8 is scraped by the reverse rotation of the circulation pump P, and air and water flow vigorously together in the drainage hose 8. Therefore, it is possible to physically discharge dirt in the drainage hose 8. Moreover, since the water collected at the time of washing the tank is used and circulated or exhausted while draining, the water is saved as compared with the case where water is newly collected.

  Here, when the rinsing water is drained, the fan 41 may be rotated and exhausted. However, when the water accumulated in the outer tub 20 is drained in the less dirty bath cleaning shower 1 (S403). Only exhausting is efficient. The water collected in the outer tub 20 in the tub cleaning shower 2 (S405) is supplied to the drain hole 101 and used to recover the water sealing of the drain trap 19, so it is preferable not to exhaust at this time. In the case of exhausting even the drainage in the tank cleaning shower 2 (S405), it is necessary to supply tap water again and drain the drainage hole 101 in order to recover the water sealing of the drain trap 19.

  The automatic cleaning process (S400) in the present embodiment is performed only when the washing course or the washing drying course is started with the predetermined button set to ON, and the washing course or When the washing / drying course is started, a normal washing operation or a washing / drying operation is performed by omitting the tank washing step and the drain hose washing step. Therefore, if the automatic cleaning process is set to ON, the tank wall surface and the automatic washing process are automatically performed during the washing course and the washing / drying course without performing a special washing course different from the washing course and the washing / drying course. Operate so that the drainage hose is less likely to remain dirty. 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 the adhesion of dust to the laundry being washed.

  Moreover, in the above-mentioned embodiment, the tank cleaning and the drain hose cleaning are integrally performed automatically during the period from the washing process to the dehydration process. However, the drain hose cleaning is performed without performing the tank cleaning. You may make it perform only. Further, it is possible to perform only the drain hose cleaning by the circulation pump P without performing the drain hose cleaning by the exhaust.

  FIG. 18 and FIG. 19 show the control in the case where only the drain hose cleaning by the circulation pump P is performed without performing the tank cleaning as another embodiment.

  In this example, when the two rinsing steps (S300) are completed, the circulation pump P is rotated in the reverse direction without draining the water accumulated in the outer tub 20 with the rotating water supply / replenishment water (S305) (S700). As a result, the water accumulated in the bottom and indentation of the outer tub 20 circulates through the circulation hose 81 and the detergent-dissolved hose 84, and the circulation hose 81 and the like are cleaned without adding new tap water. It is possible to wash away. After this operation is continued for a predetermined time, the rotation of the circulation pump P is stopped and the process proceeds to the dehydration step (S501).

  In addition, when discharging the water after the drainage hose is cleaned by the circulation pump P, the fan 41 may be rotated to exhaust the water. Moreover, after draining the water accumulated in the two rinsing steps (S300) without exhausting the circulation pump P (while exhausting as necessary), the tap water is supplied again and the drain port 20c is immersed in the water. After accumulating to a certain extent, the drainage hose may be cleaned by rotating the circulation pump P in the reverse direction. Here, when the amount of tap water is supplied again, if it is stored more than the extent that the drainage joint 18 is immersed, a certain hose cleaning effect can be obtained.

  Further, in the above-described embodiment, the heater-heating type washing / drying machine has been described, but the same can be applied to a heat pump-type washing / drying machine. Furthermore, in the above-described embodiment, the drum type washing / drying machine has been described. However, a vertical washing / drying machine or a washing machine having no drying function may be used.

DESCRIPTION OF SYMBOLS 1 Housing 10 Rotating drum 20 Outer tank 20c Drain outlet 81 Circulation hose 84 Detergent melting hose 85 Sprinkling hose 86 Connection hose P Circulation pump V Drainage solenoid valve

Claims (6)

An outer tub supported in the housing and storing water therein, an inner tub enclosed in the outer tub and containing clothes, and a circulation pump for circulating the water accumulated in the outer tub, washing and rinsing In the washing machine having each step of dehydration,
A first flow path from the bottom of the outer tank to the circulation pump;
A second flow path from the circulation pump to the upper part of the outer tub,
A third flow path from the circulation pump to the bottom of the outer tank,
During the washing step, by rotating the circulation pump forward, the water accumulated in the bottom of the outer tub is sucked from the first flow path, and from the upper part of the outer tub through the second flow path. Watering the inner tank,
Between the rinsing step and the dehydration step, the circulation pump is rotated in the reverse direction to suck water accumulated in the bottom of the outer tank from the first flow path, and to A washing machine characterized by being circulated to the bottom of the tank. An outer tub supported in the housing and storing water therein, an inner tub enclosed in the outer tub and containing clothes, a water supply device for supplying water to the outer tub, and water in the outer tub In a washing machine having a drainage device for discharging water and a circulation pump for circulating water accumulated in the outer tub, and having steps of washing, rinsing and dehydration,
A first flow path from a drain port provided in the outer tub to the circulation pump;
A second flow path from the circulation pump to the water spout provided in the upper part of the outer tub,
Having a third flow path from the circulation pump to the bottom of the outer tub,
The water stored in the outer tub by the water supply device during the washing step is sucked from the first flow path by rotating the circulation pump forward, and the outer tub is passed through the second flow path. Watering from above into the inner tank,
The water stored in the outer tub by the water supply device during the rinsing step is discharged by the drainage device, and then the water stored again in the outer tub by the water supply device is rotated reversely through the circulation pump. The washing machine is configured to suck in the first flow path and circulate it through the third flow path to the bottom of the outer tub. An outer tub supported in the housing and storing water therein, an inner tub enclosed in the outer tub and containing clothes, a water supply device for supplying water to the outer tub, and water in the outer tub In a washing machine having a drainage device for discharging water and a circulation pump for circulating water accumulated in the outer tub, and having steps of washing, rinsing and dehydration,
A first flow path from a drain port provided in the outer tub to the circulation pump;
A second flow path from the circulation pump to the water spout provided in the upper part of the outer tub,
Having a third flow path from the circulation pump to the bottom of the outer tub,
The water stored in the outer tub by the water supply device during the washing step is sucked from the first flow path by rotating the circulation pump forward, and the outer tub is passed through the second flow path. Watering from above into the inner tank,
The water stored in the outer tub by the water supply device during the rinsing step is sucked from the first flow path by reversely rotating the circulation pump, and the outer tub is passed through the third flow path. A washing machine characterized by circulating to the bottom. In claim 2 or 3,
The washing machine, wherein the water stored in the outer tub by the water supply device is dissolved in the detergent by reversely rotating the circulation pump during the washing step. In claim 4,
After the washing step is completed, the washing machine is characterized in that the circulation pump is reversely rotated at a rotation speed higher than the rotation speed at the time of dissolving the detergent. In claim 2,
The water stored in the outer tub again is tap water supplied from the water supply means for washing the outer tub or the inner tub.