JP5985307B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine.

  2. Description of the Related Art Conventionally, as a washing machine, there is a washing machine that rinses laundry by spraying water sprayed in a shower shape by a shower nozzle onto the laundry in the drum while rotating the drum during the rinsing process (for example, JP 2008-54826 A (See Patent Document 1)).

  When rinsing laundry using the shower nozzle, water is supplied into the aquarium from a water supply duct connected to the upper part of the aquarium, and water is collected between the lower part of the aquarium and the lower part of the drum. Drive. Thereby, the water between the lower part of the said water tank and the lower part of a drum is drawn out of a water tank, and sprays out in a shower shape toward the inside of a drum from a shower nozzle.

JP 2008-54826 A

  By the way, in the said conventional washing machine, in order to prevent failure of a circulation pump, it is necessary to accumulate a predetermined amount of water in a water tank before driving a circulation pump.

  That is, the circulation pump cannot be driven unless the water level in the water tank reaches a preset water level.

  Therefore, the conventional washing machine has a problem that it takes time until the water level in the water tank reaches a preset water level, and the rinsing process becomes long.

  In addition, the conventional washing machine has a problem that foam restraint often occurs during the rinsing process.

  Then, the subject of this invention is providing the washing machine which can shorten a rinse process and can suppress generation | occurrence | production of bubble restraint.

In order to solve the above problems, the washing machine of the present invention is:
An outer box,
A water supply port provided in the outer box and supplied with water outside the outer box;
A water tank disposed in the outer box;
A drum rotatably disposed in the aquarium and containing laundry;
A driving device for rotationally driving the drum;
A through hole provided in the drum for communicating a space between the water tank and the drum and a space in the drum;
A shower nozzle that sprays water into the drum in a shower shape;
A water supply channel connecting the water supply port and the shower nozzle ;
A water supply valve provided in the water supply channel;
A control device for controlling the driving device and the water supply valve ;
In the rinsing process, the control device rotates the drum at a low rotation speed, determines whether the drum is unbalanced, and detects an unbalance at a medium rotation speed higher than the low rotation speed. Low-speed dehydration for rotating the drum, high-speed dehydration for rotating the drum at a maximum rotation speed faster than the medium rotation speed, a rotation speed faster than the low rotation speed and slower than the medium rotation speed, While rotating the drum, shower water supply is performed for spraying shower-like water from the shower nozzle toward the inside of the drum .

  According to the above configuration, since the water supply channel connects the water supply port and the shower nozzle, during the rinsing process, water outside the outer box is supplied from the water supply port to the shower nozzle via the water supply channel. The shower nozzle can spray the water outside the outer box directly into the drum in a shower-like manner without accumulating water from the outside in the water tank. Therefore, even if the water level in the water tank is not set to a preset water level, the water sprayed by the shower nozzle can be applied to the laundry in the drum and the laundry can be rinsed, so that the rinsing process can be shortened.

  By the way, when the water is accumulated between the water tank and the drum during the rinsing step, the cleanliness of the water is reduced including the detergent attached to the inner wall of the water tank or the outer wall of the drum.

  On the other hand, when the water outside the outer box is supplied from the water supply port to the shower nozzle through the water supply channel, the above-described reduction in cleanliness does not occur in the water sprayed by the shower nozzle in a shower shape. . That is, the cleanliness of the water sprayed by the shower nozzle in a shower shape is high. Therefore, the foam generated in the water tank can be reduced and the occurrence of foam restraint can be suppressed.

  Moreover, since the water which is sprayed from the shower nozzle in a shower shape and has a high cleanliness level is applied to the laundry in the drum, the rinsing performance can be improved.

  In addition, when water outside the outer box is supplied from the water supply port to the shower nozzle through the water supply channel, all or most of the water is applied to the laundry in the drum to contribute to the rinsing of the laundry. Can do. Therefore, since the laundry in the drum can be efficiently rinsed with the water, a high water-saving effect can be obtained.

  In contrast, as in the washing machine disclosed in Japanese Patent Application Laid-Open No. 2008-54826, after storing water in the water tank, the circulation pump is driven to draw the water in the water tank out of the water tank and return it to the drum. Water that does not circulate is generated. That is, there is water that does not contribute to the rinsing of the laundry in the drum. Therefore, if the laundry in the drum is efficiently squeezed, a large amount of water must be stored in the aquarium, so that only a low water-saving effect can be obtained.

The washing machine of one embodiment is
A drainage part for draining the washing water in the aquarium out of the outer box,
The shower nozzle sprays water toward the inside of the drum in a state where the washing water in the water tank is not drained out of the outer box by the drainage portion.

  According to the above embodiment, the shower nozzle injects water toward the inside of the drum in a state in which the washing water in the water tank is not drained outside the outer box at the drainage portion. It is possible to prevent draining out of the outer box only once on the laundry.

The washing machine of one embodiment is
When the shower nozzle sprays water toward the inside of the drum, a circulation pump is provided that draws washing water between the water tank and the drum out of the water tank and returns it to the drum.

  According to the above embodiment, when the shower nozzle sprays water into the drum, the circulation pump draws the washing water between the water tub and the drum out of the water tub and returns it to the drum. The water sprayed into the drum can be sufficiently used as rinse water.

In one embodiment of the washing machine,
The shower nozzle is provided at the top of the water tank, and a shower nozzle on the water jet obliquely downward, is provided at the bottom of the water tank, of the lower shower nozzle for injecting water obliquely upward At least one of the following.

  According to the above embodiment, the shower nozzle is provided in the upper part of the water tank, and is provided in the upper shower nozzle for injecting water obliquely downward, and the upper shower nozzle in the lower part of the water tank for injecting water obliquely upward Since it has at least one of the shower nozzle, water can be poured over a wide area of the laundry in the drum.

  The washing machine of the present invention includes a water supply port to which water outside the outer box is supplied, a shower nozzle that injects water into the drum in a shower shape, and a water supply channel that connects the water supply port and the shower nozzle. The shower nozzle can spray water outside the outer box in a shower shape toward the inside of the drum. Therefore, even if the water level in the water tank is not set to a preset water level, the water sprayed by the shower nozzle can be applied to the laundry in the drum and the laundry can be rinsed, so that the rinsing process can be shortened.

  Also, when the water outside the outer box is supplied from the water supply port to the shower nozzle through the water supply channel, the shower nozzle has a high cleanliness of the water sprayed in the shower shape, so the bubbles generated in the water tank are reduced. The occurrence of bubble restraint can be suppressed.

  Moreover, since the water which is sprayed from the shower nozzle in a shower shape and has a high cleanliness level is applied to the laundry in the drum, the rinsing performance can be improved.

  In addition, when water outside the outer box is supplied from the water supply port to the shower nozzle through the water supply channel, all or most of the water is applied to the laundry in the drum to contribute to the rinsing of the laundry. Can do. Therefore, since the laundry in the drum can be efficiently rinsed with the water, a high water-saving effect can be obtained.

FIG. 1 is a schematic perspective view of a drum type washing / drying machine according to an embodiment of the present invention. FIG. 2 is a schematic sectional view taken along the line II-II in FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. FIG. 4 is a diagram showing a sequence of the rinsing process of the drum type washing and drying machine. FIG. 5 is a schematic cross-sectional view of a modified example of the drum type washing and drying machine.

  Hereinafter, a washing machine of the present invention will be described in detail with reference to embodiments shown in the drawings.

  In FIG. 1, the schematic perspective view which looked at the drum type washing-drying machine of one Embodiment of this invention from diagonally upward is shown.

  The drum type washing and drying machine includes an outer box 101 having an outer box opening 106 on the front surface. The upper part of the outer box 101 is made of a top plate 115, while the lower part of the outer box 101 is made of a bottom base 116.

  The outer box opening 106 is opened and closed by a door 102 that is rotatably attached to the outer box 101 by a hinge. A part of the door 102 is made of a transparent member such as glass so that the inside of the drum 104 can be seen.

  In addition, an operation panel 117 having operation keys and a display unit is provided on the upper portion of the front surface of the outer box 101. On the back side of the operation panel 117, a control unit 114 (shown in FIG. 2) for controlling the operation of the drum type washing and drying machine is provided. And according to the input to the operation panel 117, the washing process, the rinsing process, the dehydration process and the drying process are successively performed in this order, or each process is performed independently.

  FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG.

  In the outer box 101, a bottomed cylindrical water tank 103, a bottomed cylindrical drum 104 rotatably arranged in the water tank 103, and a drying for drying the laundry in the drum 104 A system 200 and a suspension 118 that elastically supports the water tank 103 are installed.

  The water tank 103 is inclined so that the rear part is lower than the front part. Further, a water tank opening 107 that opens to face the outer box opening 106 is provided on the front surface of the water tank 103.

  A main motor 119 is attached to the rear surface (bottom outer surface) of the water tank 103. The main motor 119 has a case 136, and a rotor 137 and a stator 138 disposed in the case 136. The stator 138 is fixed to the case 136, and the rotor 137 is fixed to the rotating shaft 139 of the drum 104.

  The rotating shaft 139 is rotatably supported by a bearing 140 fixed to the case 136, and the tip is fixed to the drum 104. Thereby, the rotation of the rotating shaft 139 can be directly transmitted to the drum 104.

  There is a rotation speed sensor (not shown) for detecting the rotation speed of the rotor 137, and the main motor 119 is an inverter motor whose rotation speed is controlled based on the detection result of the rotation speed sensor.

  Similar to the water tank 103, the drum 104 is inclined such that the rear part is lower than the front part. In addition, a drum opening 108 that opens to face the water tank opening 107 is provided on the front surface of the drum 104. Further, a plurality of through holes 109 (only six are shown in FIG. 2) are provided in the entire peripheral wall of the drum 104.

  The through hole 109 has a washing water (water containing a detergent or a softener or water such as tap water or bath water) between the space between the water tank 103 and the drum 104 and the space in the drum 104. And distribute air. For example, when the drum 104 is rotated to dehydrate the laundry in the drum 104, the washing water in the drum 104 goes out of the drum 104 through the through hole 109.

  Further, a baffle 120 is provided on the inner wall surface of the drum 104 so as to protrude inward in the radial direction. The baffles 120 are arranged at three places, for example, at 120 ° intervals in the circumferential direction. These baffles 120 repeat the lifting and dropping of the laundry as the drum 104 rotates. For example, when the drum 104 is rotated in the washing process, the laundry can be washed by being pulled by the baffle 120 and dropped in the washing liquid.

  A fluid balancer 121 is provided on the outer peripheral edge of the drum opening 108. That is, a fluid balancer 121 that surrounds the drum opening 108 from the outside is provided. The fluid balancer 121 is filled with a liquid having a high specific gravity such as salt water, and the liquid moves when the drum 104 rotates, so that the movement of the center of gravity due to the deviation of the laundry and the washing water is canceled. The fluid balancer 121 may be provided so as to face the inner peripheral edge of the drum opening 108.

  A blower duct 203 is disposed at the lower part of the space in the water tank 103. The front end of the air duct 203 serves as an air outlet 205 located between the lower edge of the water tank opening 107 and the lower edge of the drum opening 108. On the other hand, the rear end of the air duct 203 is connected to the air outlet 207 of the fan case 206.

  A heating device 202 that heats air from the air outlet 207 is disposed in the air duct 203. The heating device 202 includes a heater case 208 and a sheathed heater 209 that is mostly accommodated in the heater case 208.

  The heater case 208 includes a metal main body and a heat-resistant resin frame that fixes the main body. This frame is connected to the air duct 203.

  Since the sheathed heater 209 is arranged so that a part thereof is immersed in the washing water in the water tank 103, the washing water in the water tank 103 can be heated.

  A packing 105 made of an elastic material such as rubber or soft resin is fixed to the water tank opening 107. As a result, when the door 102 is closed, the door 102 comes into close contact with the packing 105, so that the liquid in the water tank 103 can be prevented from leaking out of the water tank 103.

  The packing 105 connects the outer box opening 106 and the water tank opening 107, and the laundry passes through the space inside the packing 105. That is, the packing 105 forms an access path for taking in and out the laundry. Further, the packing 105 is provided with a bellows or the like so as to bend and follow in accordance with the swinging of the water tank 103.

  A lower end portion of a water supply duct 112 for supplying washing water into the water tank 103 is connected to an upper portion of the water tank 103. On the other hand, the upper end of the water supply duct 112 is connected to the lower part of the detergent case 111. The detergent case 111 contains a detergent, a bleaching agent, and a softening agent. Further, tap water from the water supply port 122 is supplied into the detergent case 111. The tap water is an example of water outside the outer box.

  The water supply port 122 is supplied with tap water from a tap (not shown). The water supply port 122 is connected to the detergent case 111 via the main water supply channel 124, to the cooling nozzle 127 (shown in FIG. 3) via the water supply channel 126 for the cooling nozzle, and to the shower nozzle 143 via the water supply channel 142 for the shower nozzle. Are connected to each other. The shower nozzle water supply channel 142 is an example of a water supply channel, and the shower nozzle 143 is an example of an upper shower nozzle.

  The main water supply path 124 is provided with a main water supply valve 123 that is controlled to be opened and closed by the control unit 114. During the washing process and the rinsing process, the main water supply valve 123 is opened, and the tap water supplied to the water supply port 122 flows into the detergent case 111.

The cooling nozzle water supply passage 126 is provided with a cooling nozzle water supply valve 125 that is controlled to be opened and closed by the control unit 114. During the drying process, the cooling nozzle water supply valve 125 is opened, and the tap water flows through the cooling nozzle water supply passage 126 and reaches the cooling nozzle 127.

  The shower nozzle water supply path 142 is provided with a shower nozzle water supply valve 141 that is controlled to be opened and closed by the control unit 114. During the rinsing step, the shower nozzle water supply valve 141 is opened, and tap water from the water supply port 122 is guided to the shower nozzle 143 through the shower nozzle water supply path 142.

  The shower nozzle 143 is attached to the upper edge of the water tank opening 107 so that the tip of the shower nozzle 143 faces the drum opening 108, and injects tap water obliquely downward in a shower shape. The tap water sprayed in the shower shape enters the drum 104 through the drum opening 108 and falls on the laundry.

  On the other hand, a drainage port 128 is provided at the lower part of the water tank 103 to communicate with the air duct 203 and drain the washing water in the water tank 103. The drainage port 128 is located on the downstream side of the blower 201. Further, the upper end of the drain duct 129 is connected to the drain port 128. On the other hand, the lower end portion of the drain duct 129 is connected to the drain hose 131 via the filter device 130. The liquid flowing through the drain duct 129 can flow into the drain hose 131 or the circulation hose 132 after passing through the filter device 130. Since this filter device 130 removes foreign matter such as lint in the washing water flowing through the drain duct 129, entry of foreign matter into the drain hose 131 or the circulation hose 132 can be prevented.

  The filter device 130 is provided with an air trap (not shown), and one end of a pressure guiding pipe (not shown) is connected to the air trap. The other end of the pressure guiding pipe is connected to a water level sensor (not shown).

  The drain hose 131 is provided with a drain valve 134 that is opened and closed by a drain motor 133. The drain valve 134 is controlled to open when the washing water in the drain duct 129 flows to the drain hose 131 and to close when the washing water in the drain duct 129 flows to the circulation hose 132. The drain valve 134 is an example of a drain part.

  The upper end of the circulation hose 132 is connected to the circulation nozzle 135. The circulation nozzle 135 is attached to the lower edge of the water tank opening 107 so that the tip thereof faces the drum opening 108. On the other hand, the lower end portion of the circulation hose 132 is connected to the circulation pump 110 disposed behind the filter device 130.

  The circulation pump 110 draws water between the water tank 103 and the drum 104 out of the water tank 103 and returns it to the drum 104. More specifically, the circulation pump 110 sucks water between the water tank 103 and the drum 104 through the drainage duct 129 and the filter device 130 and discharges the water to the circulation hose 132. Thereby, the circulation nozzle 135 injects water from the circulation pump 110 into the drum 104.

  The drying system 200 includes a blower 201, a heating device 202, a blower duct 203, and a dehumidifying heat exchanger 204 (shown in FIG. 3) to be described later.

  FIG. 3 is a schematic sectional view taken along line III-III in FIG.

  The dehumidifying heat exchanger 204 is disposed on the upstream side of the blower 201 attached to the lower rear portion of the water tank 103. The dehumidifying heat exchanger 204 includes a metal plate 211 arranged so that the front part is inclined higher than the rear part, and a stainless steel fixing member 212 attached to both side parts of the metal plate 211. And have.

  In addition, a dehumidifying path 214 between the dehumidifying heat exchanger 204 and the blower 201 is provided with a filter 210 made of knitted metal yarns in a net shape.

  A cooling nozzle 127 is disposed above the front end of the metal plate 211. During the drying process, the tap water supplied from the cooling nozzle 127 flows on the upper surface of the metal plate 211 to cool the metal plate 211. Thereby, tap water and the metal plate 211 cool the air which flows toward the air blower 201, and condense the water | moisture content which this air contains effectively.

  The blower 201 is attached to the lower part of the rear surface of the water tank 103. The blower 201 includes a fan case 206, a blower fan 212 that is rotatably disposed in the fan case 206, and a motor 213 that rotationally drives the blower fan 212. By the rotational drive of the blower fan 212, the air dehumidified by the dehumidifying heat exchanger 204 can be sucked into the fan case 206.

  FIG. 4 shows a sequence of the rinsing process.

  In the rinsing step, “intermediate dewatering”, “shower rinsing” and “normal (final) rinsing” are performed in this order.

  When the “intermediate dehydration” starts, first, the drain motor 133 is turned on and the drain valve 134 is opened. Then, “balance tumbling”, “balance detection”, “low speed dewatering” and “high speed dewatering” are sequentially performed. Is called. This open state of the drain valve 134 continues until the beginning of “shower water supply”.

  In the “balance tumbling”, the drum 104 is sequentially rotated in the forward rotation, rotation stop, and reverse rotation to tumbl the laundry in the drum 104. This “balance tumbling” ends when the time elapsed since the rotation of the drum 104 has reached a preset time.

  In the “balance detection”, the drum 104 is rotated in one direction in order to apply the laundry to the inner peripheral surface of the drum 104 substantially evenly. At this time, after the rotational speed of the drum 104 is gradually increased, the drum 104 is maintained at a low rotational speed (for example, 300 rpm to 400 rpm) lower than the maximum rotational speed of the drum 104 in the rinsing process for a preset time. The control unit 114 controls the main motor 119. Then, the control unit 114 determines whether or not the drum 104 is unbalanced based on the fluctuation in the rotation speed of the drum 104. If the control unit 114 determines that the drum 104 is not unbalanced, the next “low speed dewatering” is performed. On the other hand, if the control unit 114 determines that the drum 104 is not unbalanced, “balance detection” is performed again.

  In the “low-speed dehydration”, the drum 104 is preset at a medium rotation speed (for example, 500 rpm to 600 rpm) that is slower than the maximum rotation speed of 1000 rpm of the drum 104 and higher than the low rotation speed in the rinsing process. Rotate for hours. At this time, the control unit 114 controls the main motor 119 to gradually increase the rotation speed of the drum 104 from the low rotation speed to the medium rotation speed.

  In the “high speed dehydration”, the rotation speed of the drum 104 is gradually increased from the medium rotation speed to the maximum rotation speed of 1000 rpm under the control of the control unit 114, and then 1000 rpm is maintained for a preset time.

  The “shower rinsing” includes “shower water supply”, “high-speed dewatering” performed after this “shower water supply”, and “deceleration” subsequently performed after this “high-speed dewatering”.

  In the “shower water supply”, first, the control unit 114 starts control for reducing the rotational speed of the drum 104 to 400 rpm. As a result, the rotational speed of the drum 104 decelerates relatively slowly from 1000 rpm to a preset rotational speed, and then decelerates relatively rapidly from the rotational speed to 400 rpm. At this time, when the rotation speed of the drum 104 reaches the preset rotation speed, the control unit 114 switches the drain motor 133 from on to off and closes the drain valve 134. When the rotation speed of the drum 104 reaches 400 rpm, the control unit 114 switches the shower nozzle water supply valve 141 from OFF to ON, and opens the shower nozzle water supply valve 141. And if the preset time passes after opening the water supply valve 141 for shower nozzles, the control part 114 will switch the circulation pump 110 from OFF to ON. As a result, water between the water tank 103 and the drum 104 is drawn out of the water tank 103 and returned into the drum 104. Thereafter, when a preset time has elapsed since the circulation pump 110 was turned on, the control unit 114 switches the water supply valve 141 for the shower nozzle and the circulation pump 110 from on to off, and switches the drain motor 133 from off to on. Open the drain valve 134. In the shower rinsing, the rotational speed of the drum 104 does not gradually decrease due to inertia but gradually decreases while being driven to rotate by the main motor 119. During the “shower water supply”, the main water supply valve 123 is kept off.

  In the “high speed dewatering”, the rotation speed of the drum 104 is gradually increased from 400 rpm to the maximum rotation speed of 1000 rpm under the control of the control unit 114. This “high speed dewatering” is completed by maintaining the rotation speed of the drum 104 at 1000 rpm for a preset time. During the “high speed dehydration”, the main water supply valve 123, the shower nozzle water supply valve 141, and the circulation pump 110 are held off, while the drainage motor 133 is held on.

  In the “deceleration”, the rotation speed of the drum 104 is gradually reduced from 1000 rpm to 0 rpm under the control of the control unit 114. At this time, the rotational speed of the drum 104 is decelerated at a constant acceleration. This “deceleration” ends with the rotation speed of the drum 104 being maintained for a preset time at 0 rpm. During the “deceleration”, the main water supply valve 123, the shower nozzle water supply valve 141, and the circulation pump 110 are held off, while the drainage motor 133 is held on.

  In the “normal (final) rinsing”, “rinsing water supply”, “rinsing”, and “drainage” are sequentially performed.

  In the above “rinsing water supply”, the control unit 114 controls the drainage motor 133 to be switched from on to off, closes the drainage valve 134, and switches the main water supply valve 123 from off to on. The water tank 103 is supplied with water.

  In the above “rinsing”, the control unit 114 switches the main water supply valve 123 from on to off, and then causes the drum 104 to repeat forward rotation, rotation stop, and reverse rotation sequentially. During the “rinsing”, the circulation pump is turned on after being turned on a plurality of times.

  In the “drainage”, the control unit 114 switches the drainage motor 133 from OFF to ON, opens the drain valve 134, and causes the drum 104 to repeat forward rotation, rotation stop, and reverse rotation sequentially.

  According to the drum-type washing and drying of the above configuration, the shower nozzle water supply path 142 connects the water supply port 122 and the shower nozzle 143. Therefore, in the “shower water supply”, the shower nozzle water supply valve 141 is opened to supply tap water. The water can be supplied from the water supply port 122 to the shower nozzle 143 through the shower nozzle water supply path 142. Accordingly, the shower nozzle 143 can inject tap water that does not pass through the water tank 103 into the drum 104 in a shower shape. That is, the tap water supplied to the water supply port 122 can be sprayed in a shower shape directly from the shower nozzle 143 into the drum 104 without accumulating in the water tank 103. Therefore, without waiting until the water level in the water tank 103 reaches a preset water level, the water sprayed by the shower nozzle 143 can be applied to the laundry in the drum 104 and the laundry can be rinsed, so that the rinsing process can be shortened. .

  By the way, in the above “shower water supply”, when tap water is accumulated between the water tank 103 and the drum 104, the tap water includes a detergent attached to the inner wall of the water tank 103 or the outer wall of the drum 104, and the cleanliness is lowered. Resulting in.

  On the other hand, when the water outside the outer box 101 is supplied from the water supply port 122 to the shower nozzle 143 through the shower nozzle water supply channel 142, the water sprayed in the shower shape by the shower nozzle 143 is the inner wall of the water tank 103. Or since the detergent adhering to the outer wall of the drum 104 is not included, the cleanliness is high. Therefore, bubbles generated in the water tank 103 can be reduced, and generation of bubble restraint can be suppressed.

  Moreover, since the tap water which is sprayed from the shower nozzle 143 in a shower shape and has high cleanliness is applied to the laundry in the drum 104, the rinsing performance can be enhanced.

  In addition, when the tap water is supplied from the water supply port 122 to the shower nozzle 143 through the shower nozzle water supply channel 142, all or most of the tap water is applied to the laundry in the drum 104. This can contribute to rinsing. Accordingly, since the laundry in the drum 104 can be efficiently rinsed with the tap water, a high water-saving effect can be obtained.

  On the other hand, as in the washing machine disclosed in Japanese Patent Application Laid-Open No. 2008-54826, after water is stored in the water tank, the circulation pump is turned on, and the water in the water tank is drawn out of the water tank and returned to the drum. Water that does not circulate is generated. That is, there is water that does not contribute to the rinsing of the laundry in the drum. Therefore, if the laundry in the drum is efficiently squeezed, a large amount of water must be stored in the aquarium, so that only a low water-saving effect can be obtained.

  Specifically, the amount of water used in the rinsing process of the drum type laundry dryer of the present embodiment is 60% to 70% of the amount of water used in the rinsing process of Japanese Patent Application Laid-Open No. 2008-54826. Just do it.

  Further, the shower nozzle 143 sprays tap water into the drum 104 with the drain valve 134 closed, so that the tap water is applied to the laundry in the drum 104 only once. 101 can be prevented from draining outside.

  In the “shower water supply”, when the preset time has elapsed after the shower nozzle water supply valve 141 is opened, the control unit 114 switches the circulation pump 110 from OFF to ON, so that the shower nozzle 143 is switched to the drum 104. The tap water jetted inward can be sent to the circulation nozzle 135 by the circulation pump 110. Therefore, since the tap water can be applied to the laundry a plurality of times, it can be sufficiently used as rinse water.

  Further, since the shower nozzle 143 sprays tap water in a shower shape toward a diagonally downward direction, the tap water can be poured over a wide area of the laundry in the drum 104.

  Further, the shower nozzle 143 is attached to the upper edge of the water tank opening 107 and sprays tap water in a shower-like manner obliquely downward, so that the tap water can be reliably applied to the laundry in the drum 104. it can.

  In the above embodiment, one shower nozzle 143 is attached to the upper edge of the water tank opening 107, but a plurality of shower nozzles 143 may be attached to the upper edge of the water tank opening 107.

  In the above embodiment, the shower nozzle 143 was only attached to the upper edge of the water tank opening 107, but the shower nozzle 143 was attached to the upper edge of the water tank opening 107, and as shown in FIG. A shower nozzle 144 may be attached to the lower edge of the opening 107. Alternatively, the shower nozzle 144 may be attached to the lower edge of the water tank opening 107 without attaching the shower nozzle 143 to the upper edge of the water tank opening 107. The shower nozzle 144 is an example of a lower shower nozzle.

  One end of a shower nozzle water supply channel 145 is connected to the shower nozzle 144. The other end of the shower nozzle water supply channel 145 is connected to a portion from the shower nozzle water supply valve 141 to the shower nozzle 143 in the shower nozzle water supply channel 142. Accordingly, when the shower nozzle water supply valve 141 is opened, tap water can be supplied from the water supply port 122 to the shower nozzle 143 via the shower nozzle water supply channels 142 and 145 and supplied to the shower nozzle 144. The shower nozzle water supply channel 145 is an example of a water supply channel.

  When the tap water is supplied from the water supply port 122 to the shower nozzle 143 via the shower nozzle water supply channels 142 and 145 and supplied to the shower nozzle 144, the shower nozzle 144 jets the tap water obliquely upward in a shower shape. The tap water can be poured over a wide area of the laundry in the drum 104.

  In the modification of FIG. 5, one shower nozzle 144 is attached to the lower edge of the water tank opening 107, but a plurality of shower nozzles 144 may be attached to the lower edge of the water tank opening 107.

  In the above embodiment, the maximum rotation speed of the drum 104 at the time of the rinsing process is set to 1000 rpm. However, the maximum rotation speed of the drum 104 at the time of the rinsing process may be set to a rotation speed other than 1000 rpm (for example, 900 rpm).

  In the above embodiment, in “shower water supply”, the rotational speed of the drum 104 is reduced to 400 rpm, but the rotational speed of the drum 104 may be reduced to a rotational speed other than 400 rpm (300 rpm).

  In the above-described embodiment, the circulation nozzle 135 may eject water as a shower, or may eject water.

  In the above embodiment, the drum-type washing and drying machine performs “shower rinsing” once in the rinsing process, but may perform “shower rinsing” a plurality of times in the rinsing process.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, what combined the said embodiment and the above-mentioned modification suitably is good also as one Embodiment of this invention.

  Moreover, in the said embodiment, although the heater type drum-type washing dryer was demonstrated, it cannot be overemphasized that it can implement similarly about a heat pump type drum-type washing dryer.

  Further, the present invention can be applied not only to a washing machine having a function for drying laundry as in the above embodiment, but also to a washing machine not having a function for drying laundry.

DESCRIPTION OF SYMBOLS 101 Outer box 103 Water tank 104 Drum 106 Outer box opening part 107 Water tank opening part 108 Drum opening part 109 Through hole 110 Circulation pump 114 Control part 122 Water supply port 123 Main water supply valve 124 Main water supply path 126 Cooling nozzle water supply path 134 Drain valve 141 Shower nozzle water supply valve 142,145 Shower nozzle water supply channel 143,144 Shower nozzle

Claims (4)

An outer box,
A water supply port provided in the outer box and supplied with water outside the outer box;
A water tank disposed in the outer box;
A drum rotatably disposed in the aquarium and containing laundry;
A driving device for rotationally driving the drum;
A through hole provided in the drum for communicating a space between the water tank and the drum and a space in the drum;
A shower nozzle that sprays water into the drum in a shower shape;
A water supply channel connecting the water supply port and the shower nozzle ;
A water supply valve provided in the water supply channel;
A control device for controlling the driving device and the water supply valve ;
In the rinsing process, the control device rotates the drum at a low rotation speed, determines whether the drum is unbalanced, and detects an unbalance at a medium rotation speed higher than the low rotation speed. Low-speed dehydration for rotating the drum, high-speed dehydration for rotating the drum at a maximum rotation speed faster than the medium rotation speed, a rotation speed faster than the low rotation speed and slower than the medium rotation speed, A washing machine for performing shower water supply for injecting shower-like water from the shower nozzle toward the inside of the drum while rotating the drum . The washing machine according to claim 1,
A drainage part for draining the washing water in the aquarium out of the outer box,
The washing machine, wherein the shower nozzle jets water toward the inside of the drum in a state where the washing water in the water tank is not drained outside the outer box by the drainage portion. The washing machine according to claim 1 or 2,
A washing machine comprising: a circulation pump that draws washing water between the water tank and the drum out of the water tank and returns the water into the drum when the shower nozzle sprays water into the drum. . In the washing machine according to any one of claims 1 to 3,
The shower nozzle is provided at the top of the water tank, and a shower nozzle on the water jet obliquely downward, is provided at the bottom of the water tank, of the lower shower nozzle for injecting water obliquely upward A washing machine having at least one of the following.

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