CN110629449A - Washing machine with drying function - Google Patents

Abstract

The invention discloses a washing machine with a drying function. The washing machine is provided with: a washing tank (320) for washing laundry; a heat exchanger (420) for exchanging heat with the air passing through the washing tank to form dry air for drying the clothes; a water spraying mechanism (511, 520) including a water spraying part (520) for spraying water to the heat exchanger and cleaning the heat exchanger; and a water return path (475, 480) for returning the water ejected from the water spray part to the washing tank.

Description

Washing machine with drying function

The application is a divisional application of Chinese patent application with application date of 2013, 4 and 9, priority date of 2012, 7 and 24, application number of 201380017662.3, and invented name of "washing machine with drying function".

Technical Field

The present invention relates to a washing machine having a drying function for drying laundry.

Background

In recent years, washing machines having not only a washing function of washing laundry but also a drying function of drying laundry have been widely used. The washing machine dries laundry by circulating high-temperature and dry air (hereinafter, dry air) in a casing. The washing machine typically includes a heat exchanger for exchanging heat with air circulating in the housing to form dry air.

The dry air collides with the laundry in the washing tub. As a result, the moisture of the laundry is sucked by the dry air. The air having extracted moisture from the laundry is then returned to the heat exchanger.

As a result of the dry air contacting the clothes, dust such as lint and hair separated from the clothes may float in the air returned to the heat exchanger. A washing machine typically has an air filter for removing dust from air directed toward a heat exchanger. Although the air filter removes most of the dust, a part of the dust may pass through the air filter and adhere to the heat exchanger. Dust adhering to the heat exchanger may reduce heat exchange efficiency.

Patent document 1 proposes a technique for removing dust by spraying water onto a heat exchanger. As a result of the water spray to the heat exchanger, excessive reduction of the heat exchange efficiency due to the dust is prevented.

Spraying water into the heat exchanger means using additional water. Thus, the washing machine having the function of washing the heat exchanger consumes a large amount of water as compared to a device having no washing function of the heat exchanger.

Patent document 1: japanese laid-open patent publication No. 2005-224491

Disclosure of Invention

The invention aims to provide a washing machine capable of achieving high water utilization efficiency.

A washing machine according to an aspect of the present invention has a drying function. The washing machine includes: a washing tank for washing the laundry; a heat exchanger which exchanges heat with air passing through the washing tub to form dry air for drying the laundry; a water spraying mechanism having a water spraying part for spraying water to the heat exchanger and cleaning the heat exchanger; and a water return path for returning the water ejected from the water spray part to the washing tank.

The washing machine of the invention can achieve high water utilization efficiency.

The objects, features and advantages of the present invention will become more apparent from the detailed description and the accompanying drawings.

Drawings

Fig. 1 is a schematic perspective view of a washing machine according to embodiment 1.

Fig. 2 is a schematic block diagram of the washing machine shown in fig. 1.

Fig. 3 is a schematic sectional view of the washing machine shown in fig. 1.

Fig. 4 is a schematic diagram of the heat pump device of the washing machine shown in fig. 3.

Fig. 5 is a schematic block diagram of a water supply mechanism of the washing machine shown in fig. 2.

Fig. 6 is a schematic perspective view of the heat exchanging part of the washing machine shown in fig. 3.

Fig. 7 is a schematic bottom view of the heat exchange unit of the washing machine shown in fig. 3.

Fig. 8 is a schematic perspective view of the heat exchanging part of the washing machine shown in fig. 2.

Fig. 9 is a schematic plan view of the heat exchange portion shown in fig. 8.

Fig. 10 is a schematic flowchart showing the operation of the washing machine shown in fig. 2.

Fig. 11 is a schematic block diagram of the washing machine shown in fig. 2.

Fig. 12 is a graph showing an example of an output from the light sensor of the washing machine shown in fig. 11.

Fig. 13 is a schematic flowchart showing the operation of the washing machine shown in fig. 11.

Fig. 14A is a schematic timing chart showing the opening and closing timings of the 1 st water supply valve and the drain valve of the washing machine shown in fig. 11.

Fig. 14B is a schematic timing chart showing the opening and closing timings of the 1 st water supply valve and the drain valve of the washing machine shown in fig. 11.

Fig. 15A is a schematic diagram showing a design pattern of an operation process of the washing machine shown in fig. 2.

Fig. 15B is a schematic diagram showing a design pattern of an operation process of the washing machine shown in fig. 2.

Fig. 16 is a schematic diagram showing various design patterns of the 2 nd operation of the washing machine shown in fig. 2.

Fig. 17 is a schematic plot showing the operating time in the 1 st to 3 rd design modes shown in fig. 16.

Fig. 18 is a schematic graph showing the amount of water used in the 1 st to 3 rd design modes shown in fig. 16.

Fig. 19 is a schematic diagram showing various design patterns of the 5 th operation of the washing machine shown in fig. 2.

Fig. 20 is a schematic graph showing the amount of water used in the 1 st to 3 rd design modes shown in fig. 19.

Fig. 21 is a schematic sectional view of the washing machine according to embodiment 2.

Detailed Description

Hereinafter, an exemplary washing machine will be described with reference to the accompanying drawings. In the following description, directional terms such as "upper", "lower", "left" and "right" are used for clarity of description only. Thus, these terms do not set any limit to the principle of the washing machine.

(embodiment 1)

(washing machine)

Fig. 1 is a schematic perspective view of a washing machine 100 according to embodiment 1. A washing machine 100 is explained with reference to fig. 1.

The washing machine 100 includes a housing 110. Washing machine 100 has not only a washing function of washing laundry but also a drying function of drying laundry by circulating dry air in casing 110. The frame 110 includes a front wall 111, a rear wall 112 opposite to the front wall 111, a left wall 113 erected between the front wall 111 and the rear wall 112, and a right wall 114 opposite to the left wall 113. The frame 110 also includes a top wall 115 that closes an area surrounded by upper edges of the front wall 111, the rear wall 112, the left wall 113, and the right wall 114.

The front wall 111 is formed with an inlet 116. The user can store laundry in the housing 110 through the input port 116.

Washing machine 100 further includes a door 120 attached to front wall 111. The user can rotate the door 120 between the open position and the closed position. The door 120 is shown in an open position in fig. 1. The user can move the door 120 to the open position to open the inlet 116. Thereafter, the user can store the laundry in the housing 110 through the input port 116. The user can move the door 120 to the closed position to close the inlet 116. Thereafter, the laundry is subjected to various processes such as washing, dewatering, and drying in the casing 110.

The washing machine 100 is further provided with a console 201. The console 201 is used as part of the front wall 111. The user can operate the console 201 to set various operation procedures.

Fig. 2 is a schematic block diagram of the washing machine 100. Referring to fig. 1 and 2, the washing machine 100 is further described. In addition, the dotted arrows shown in fig. 2 schematically indicate the flow of water in the washing machine 100. The arrows of the chain lines shown in fig. 2 schematically indicate the flow of the drying air in the washing machine 100.

The user can operate the console 201 to select one operation course from the 1 st operation course to the 5 th operation course. The console 201 outputs process information on the operation process selected by the user's operation.

The washing machine 100 further includes: a control unit 200 that receives an output signal (process information) from a console 201; a laundry treating mechanism 300 for performing various treatments (washing, rinsing, dehydrating, or drying) on laundry under the control of the control part 200; a drying mechanism 400 for drying the laundry; a water supply mechanism 500 for supplying water into the housing 110; and a drainage mechanism 600 for draining water from the housing 110. The control part 200 controls the laundry treating mechanism 300, the drying treating mechanism 400, the water supplying mechanism 500 and the water discharging mechanism 600 according to the process information outputted from the console 201.

The washing machine 100 performs a washing process, a rinsing process, a dehydrating process, and/or a drying process according to the course information output from the console 201. The laundry treating mechanism 300 includes a motor 310 operated under the control of the control part 200, and a washing tub 320 connected to the motor 310. The user moves the door 120 to the open position, and thus can insert laundry into the washing tub 320 through the input port 116. The washing tub 320 can agitate the laundry using the driving force generated by the motor 310. In the present embodiment, the washing step, the rinsing step, the dehydrating step, and/or the drying step are exemplified as the treatment modes.

If the user operates the console 201 to select one of the 1 st through 4 th operation courses, the washing machine 100 performs a washing process. In the washing step, a mixed liquid of the detergent and the tap water is supplied to the washing tank 320. The washing tub 320 can stir the laundry in the mixed liquid. Thereby, the laundry is properly washed. In the present embodiment, the washing step is exemplified as mode 1.

If the user operates the console 201 to select one of the 1 st to 3 rd operation courses, the washing machine 100 performs a rinsing process after the washing process. In the rinsing process, tap water is supplied to the washing tub 320. Therefore, the washing tub 320 can agitate the laundry in the liquid having a detergent concentration lower than that of the mixed liquid used in the washing process. Thereby, the detergent attached to the laundry is appropriately washed. In addition, the washing machine 100 may perform a dehydration operation between the rinsing steps as necessary. In the present embodiment, the rinsing step is exemplified as mode 2.

If the 1 st or 2 nd operation course is selected by the user operating the console 201, the washing machine 100 performs the dehydration process after the rinsing process. In the dehydration step, the water in the washing tank 320 is discharged. Thereafter, the washing tub 320 applies centrifugal force to the laundry, separating water from the laundry. Thereby, the laundry is dehydrated.

If the 1 st operation course is selected by the user operating the console 201, the washing machine 100 performs a drying process after the dehydrating process. In the drying process, the washing tub 320 stirs the laundry to collide the laundry with the dry air. Thereby, the laundry is effectively dried.

The drying mechanism 400 includes a blower 410 and a heat pump device 420. When the user operates the console 201 to select the 1 st operation process, the control unit 200 operates the blower 410 and the heat pump device 420 in the drying process. The blower 410 sucks air from the washing tub 320. The heat pump device 420 is disposed in a flow path of air flowing from the washing tub 320 to the blower 410. The heat pump device 420 exchanges heat with air flowing through the blower 410 to form dry air. The dry air is then sent out to the washing tub 320 by the blower 410.

As described above, in the drying process, the washing tub 320 stirs the laundry. Therefore, the dry air flowing into the washing tub 320 efficiently collides with the laundry. Thereby, the laundry is properly dried.

The water supply mechanism 500 includes a valve unit 510 and a water spray portion 520. The valve unit 510 includes a 1 st water supply valve 511 and a 2 nd water supply valve 512. When the user selects one of the 1 st operation process and the 4 th operation process, the controller 200 opens the 2 nd water supply valve 512 to supply the mixed liquid of the tap water and the detergent to the washing tub 320 in the washing process. When the user selects one of the 1 st operation process and the 3 rd operation process, the controller 200 opens the 2 nd water supply valve 512 to supply tap water to the washing tub 320 in the rinsing process. Accordingly, the laundry is agitated in the water supplied into the washing tub 320 in the washing process and the rinsing process. In the present embodiment, the washing step and the rinsing step are exemplified as the underwater agitation mode.

In the present embodiment, the controller 200 opens the 1 st water supply valve 511 in one of the washing step and the rinsing step, and supplies tap water to the sprinkler unit 520. The sprinkler 520 sprays tap water to the heat pump device 420.

As described above, the heat pump device 420 is disposed in the flow path of the air from the washing tub 320 to the blower 410. Therefore, dust such as lint and hair separated from the laundry in the washing tub 320 may be attached to the heat pump device 420. Dust adhering to the heat pump device 420 is appropriately removed by the water sprayed from the water spray unit 520. In the present embodiment, the 1 st water supply valve 511 and the water spray part 520 are exemplified as a water spray mechanism.

The drain mechanism 600 includes a circulation pump 610 and a drain valve 620. When the user selects one of the 1 st operation process to the 4 th operation process, the controller 200 operates the circulation pump 610 in the washing step, and the controller 200 circulates the mixed liquid of the tap water and the detergent between the washing tub 320 and the circulation pump 610. During this time, the control part 200 closes the drain valve 620. Thereby, the laundry is washed with a small amount of water and detergent. After the circulation pump 610 is operated for a predetermined period of time, or depending on the physical properties of the liquid circulating between the washing tank 320 and the circulation pump 610, the controller 200 opens the drain valve 620 to drain the water from the housing 110.

When the user selects one of the 1 st operation process to the 3 rd operation process, the controller 200 may operate the circulation pump 610 so that the liquid circulates between the washing tub 320 and the circulation pump 610 in the rinsing process by the controller 200. During this time, the control part 200 closes the drain valve 620. After the circulation pump 610 is operated for a predetermined period of time, or depending on the physical properties of the liquid circulating between the washing tank 320 and the circulation pump 610, the controller 200 opens the drain valve 620 to drain the water from the housing 110. In the rinsing process, the circulation and the drainage are repeated. As described above, in the rinsing process, when the 2 nd water supply valve 512 is opened, tap water is supplied to the washing tub 320, and thus the detergent attached to the laundry is finally properly washed.

The 1 st to 4 th operation courses are for washing of the laundry, and the 5 th operation course is for washing of the wash tub 320. Like the 2 nd operation, the 5 th operation includes a washing step, a rinsing step, and a dehydrating step. The operations of the laundry treating mechanism 300, the water supplying mechanism 500, and the water draining mechanism 600 in these steps of the 5 th operation process are the same as those of the 2 nd operation process. However, since the 5 th operation course is intended for the washing of the washing tub 320 (i.e., the 5 th operation course does not need to consider damage of the laundry), various parameters such as a stirring time, a stirring speed, an amount of used water, and an amount of used detergent of the washing tub 320 are different. In the present embodiment, the washing step, the rinsing step, and the dewatering step in the 5 th operation process are exemplified as the tank cleaning mode.

(clothes treating mechanism)

Fig. 3 is a schematic sectional view of the washing machine 100. The laundry treating mechanism 300 is explained with reference to fig. 3.

The washing tub 320 includes a drum 330 that accommodates the laundry L and a water tub 340 that surrounds the drum 330. The washing tub 320 is opened toward the front wall 111 of the housing 110, and receives laundry L supplied from the user through the input port 116. The inlet 116 shown in fig. 3 is closed by a door 120.

The motor 310 generates a driving force for agitating the laundry L in the washing tub 320. The laundry treating mechanism 300 includes a shaft 350 transmitting a driving force from the motor 310 to the drum 330. The water tank 340 includes a 1 st bottom wall 341 contacting the motor 310 and a 1 st peripheral wall 342 extending from a peripheral edge of the 1 st bottom wall 341 toward the front wall 111 of the housing 110. The motor 310 is disposed outside the water tank 340 (i.e., between the 1 st bottom wall 341 and the rear wall 112 of the frame 110).

The drum 330 includes a 2 nd bottom wall 331 adjacent to the 1 st bottom wall 341 of the water tank 340 and a 2 nd peripheral wall 332 extending from the peripheral edge of the 2 nd bottom wall 331 toward the front wall 111 of the frame 110. A plurality of vent holes 333 are formed in the 2 nd bottom wall 331 and the 2 nd peripheral wall 332 of the drum 330. The shaft 350 penetrates the 1 st bottom wall 341 of the water tank 340 and is connected to the 2 nd bottom wall 331 of the drum 330. When the motor 310 operates, the driving force is transmitted to the drum 330 through the shaft 350. Thereby, the drum 330 rotates in the water tank 340, and the laundry L is agitated.

The washing tub 320 includes a bearing 360 mounted to the 1 st bottom wall 341 of the water tub 340. Shaft 350 extends through bearing 360. The bearing 360 suitably supports the shaft 350 rotated by the motor 310.

(drying mechanism)

The drying processing mechanism 400 is explained with reference to fig. 2 and 3.

The drying mechanism 400 includes a circulation duct 430 in addition to the blower 410 and the heat pump device 420. The circulation duct 430 includes a 1 st end portion 431 connected to the 1 st circumferential wall 342 of the water tank 340 and a 2 nd end portion 432 connected to the 1 st bottom wall 341 of the water tank 340. The circulation duct 430 includes an upstream duct 433 extending from the 1 st end 431 between the 1 st peripheral wall 342 of the water tank 340 and the top wall 115 of the frame 110 toward the rear wall 112, and a downstream duct 434 curving downward from the upstream duct 433 and extending between the 1 st bottom wall 341 of the water tank 340 and the rear wall 112 of the frame 110 to the 2 nd end 432.

The blower 410 is disposed at a bent portion between the upstream duct 433 and the downstream duct 434. The blower 410 sucks air in the upstream duct 433, and sends air to the downstream duct 434. Thus, air flows into the water tank 340 through the 2 nd end 432 of the circulation duct 430.

The air flowing into the water tank 340 flows into the drum 330 through the vent hole 333 formed in the 2 nd bottom wall 331. After that, the air is discharged from the drum 330 through the vent hole 333 formed in the 2 nd peripheral wall 332. Air discharged from the drum 330 flows into the upstream conduit 433 through the 1 st end 431 of the circulation conduit 430. Thereafter, the air is sent into the washing tub 320 through the downstream duct 434 by the blower 410.

The drying mechanism 400 further includes an air filter unit 440 disposed in the upstream duct 433. The air filter unit 440 removes dust such as lint floating in the air upstream of the blower 410.

The washing machine 100 further includes a heat exchanger 450, and the heat exchanger 450 exchanges heat with air passing through the washing tub 320 in the upstream duct 433. The heat exchanger 450 includes the heat pump device 420 described above. The heat pump device 420 includes a dehumidifying part 421 that dehumidifies air and a heating part 422 that heats air. The air passing through the air filtering part 440 passes through the dehumidifying part 421. Thereby, the humidity of the air is reduced. After that, the air passes through the heating part 422. Thereby, the air is heated. In this way, the heat pump device 420 exchanges heat with the air passing through the washing tub 320, and can form dry air for drying the laundry L.

The dry air formed by the heat exchange portion 450 is sent into the washing tub 320 through the downstream duct 434 by the blower 410. During the drying air passes through the drum 330, the laundry L is dried by colliding with the drying air. Thus, the humidity of the air discharged from the wash tank 320 through the 1 st end 431 of the circulation duct 430 is high. In addition, dust such as lint generated from the laundry L and hair attached to the laundry L floats in the air discharged from the washing tub 320.

The air filter 440 removes dust from the air flowing in the upstream duct 433. Thereafter, the dehumidifying part 421 of the heat pump device 420 sucks moisture from the air. Therefore, the dehumidifying part 421 is in a wet state.

Air filter 440 captures most of the dust, but some of the dust may pass through air filter 440. The dust having passed through the air filter unit 440 is attached to the wet dehumidifying part 421. As described with reference to fig. 2, dust adhering to the dehumidifying part 421 is removed by the water spray from the water spray part 520.

Fig. 4 is a schematic diagram of the heat pump device 420. The heat pump apparatus 420 is explained with reference to fig. 3 and 4.

The heat pump apparatus 420 includes: a compressor 423 that compresses a working medium; an expansion valve 424 that decompresses the working medium; a 1 st circulation pipe 425 for guiding the working medium flowing from the expansion valve 424 to the compressor 423; and a 2 nd circulation pipe 426 guiding the working medium flowing from the compressor 423 to the expansion valve 424. The 1 st circulation pipe 425 and the 2 nd circulation pipe 426 form a closed loop passing through the compressor 423 and the expansion valve 424. The working medium flowing in the 1 st circulation pipe 425 becomes a low temperature by the decompression of the expansion valve 424. The working medium flowing in the 2 nd circulation pipe 426 becomes a high temperature by the compression of the compressor 423. The 1 st circulation duct 425 and the 2 nd circulation duct 426 protrude into the circulation duct 430 that guides the air drawn by the blower 410.

The 1 st circulation pipe 425 defines a flow path that turns back a plurality of times in the circulation pipe 430. The heat pump apparatus 420 further includes a plurality of fins 427 installed on the 1 st circulation pipe 425 turning back in the circulation pipe 430. The circulation pipe 425 of the 1 st circulation pipe 430 and the fin 427 are used as the above-mentioned dehumidifying part 421.

The 2 nd circulation pipe 426 defines a flow path that turns back a plurality of times in the circulation pipe 430. The heat pump apparatus 420 further includes a plurality of fins 428 mounted on the circulation pipe 2 426 turning back inside the circulation pipe 430. The 2 nd circulation pipe 426 and the fin 428 in the circulation pipe 430 are used as the above-described heating part 422.

The air flowing in the circulation duct 430 is cooled by the 1 st circulation duct 425 and the fins 427 cooled by the low-temperature working medium. Thereby, moisture in the air is condensed on the 1 st circulation pipe 425 and the fins 427. Thus, the air is dehumidified.

Thereafter, the air is heated by the circulation pipe 2 and the fins 428 heated by the working medium of high temperature. Therefore, the air becomes high temperature, and becomes dry air suitable for drying the laundry L. As described above, the dehumidifying part 421 and the heating part 422 exchange heat with the air flowing in the circulation duct 430 to form dry air. Thus, the dehumidifying part 421 and the heating part 422 are exemplified as heat exchangers.

(Water supply mechanism)

Fig. 5 is a schematic block diagram of the water supply mechanism 500. The water supply mechanism 500 is described with reference to fig. 1 to 3 and 5.

The water supply mechanism 500 includes a water supply port 530, a switching valve 540, and a detergent storage 550, in addition to the valve unit 510 and the water spray part 520. As shown in fig. 1 and 3, the water supply port 530 appears on the top wall 115 of the frame 110. Water supply port 530 is connected to a tap of a tap water pipe using a hose (not shown). Tap water is supplied to the water supply mechanism 500 through the water supply port 530. In the present embodiment, water supply port 530 is exemplified as a water supply portion.

Tap water is supplied to the valve unit 510 through the water supply port 530. When the control unit 200 opens the 2 nd water supply valve 512, the city water flows to the switching valve 540. The control section 200 controls not only the valve unit 510 but also the switching valve 540. The switching valve 540 switches the water supply path between a path toward the detergent container 550 and a path directly toward the washing tub 320 under the control of the controller 200.

The detergent container 550 contains a detergent. In the washing process, the control unit 200 controls the switching valve 540 to set the water supply path as a path of the tap water to the detergent storage unit 550. Thereby, the mixed liquid of the detergent and the tap water is supplied to the washing tank 320. In the rinsing step, controller 200 controls switching valve 540 to set the water supply path as a path through which tap water directly flows into washing tub 320. Thereby, tap water is supplied to the washing tub 320. In the present embodiment, a water supply path to the washing tub 320 through the water supply port 530, the 2 nd water supply valve 512, and the switching valve 540 is exemplified as the 2 nd water supply path.

As shown in fig. 3, the water supply mechanism 500 includes a water supply pipe 560 extending from the 1 st water supply valve 511 to the water spray part 520. As described above, control unit 200 opens water supply valve 511 in at least one of the washing step and the rinsing step. When the controller 200 opens the 1 st water supply valve 511, the tap water reaches the water spray unit 520. Thereby, the water sprinkling unit 520 sprinkles water between the air filter unit 440 and the dehumidifying unit 421, and cleans the dehumidifying unit 421. If the 1 st water supply valve 511 is closed, the water supply to the sprinkler portion 520 is stopped. In the present embodiment, a water supply path defined by the water supply port 530, the 1 st water supply valve 511, and the water supply pipe 560 is exemplified as the 1 st water supply path.

If the user selects one of the 1 st through 4 th operation courses, the control part 200 may selectively open and close the 1 st and 2 nd water supply valves 511 and 512 in the washing process. That is, the controller 200 may open the 1 st water supply valve 511 and close the 2 nd water supply valve 512. Thereby, the water is sprayed at high pressure. Thus, the dehumidifying part 421 is properly cleaned. The controller 200 may close the 1 st water supply valve 511 and open the 2 nd water supply valve 512. Thereby, water is efficiently supplied to the washing tub 320.

If the user selects one of the 1 st to 3 rd operation courses, the control part 200 may selectively open and close the 1 st and 2 nd water supply valves 511 and 512 in the rinsing process. That is, the controller 200 may open the 1 st water supply valve 511 and close the 2 nd water supply valve 512. Thereby, the water is sprayed at high pressure. Thus, the dehumidifying part 421 is properly cleaned. The controller 200 may close the 1 st water supply valve 511 and open the 2 nd water supply valve 512. Thereby, water is efficiently supplied to the washing tub 320.

If the user selects the 5 th operation course, the control part 200 may selectively open and close the 1 st and 2 nd water supply valves 511 and 512 in the washing process and/or the rinsing process. That is, the controller 200 may open the 1 st water supply valve 511 and close the 2 nd water supply valve 512. Thereby, the water is sprayed at high pressure. Thus, the dehumidifying part 421 is properly cleaned. The controller 200 may close the 1 st water supply valve 511 and open the 2 nd water supply valve 512. Thereby, water is efficiently supplied to the washing tub 320.

Fig. 6 is a schematic perspective view of the heat exchanger 450. The heat exchanging part 450 and the water spraying part 520 will be described with reference to fig. 1, 3, and 6.

The heat exchanger 450 includes an upper cover 460 covering an upper portion of the heat pump device 420 in addition to the heat pump device 420. The upper cover 460 is used as a part of the circulation duct 430. The upper cover portion 460 includes: a main body 461 covering the heat pump device 420; a circular frame 462 on which the blower 410 is mounted; and a rectangular frame 463 protruding on the air filter part 440.

A circular ventilation opening 464 is formed in the center of the circular frame 462. The blower 410 draws air from the heat pump device 420 through the vent 464. Thus, the dry air formed by the heat pump device 420 is sent into the washing tub 320 through the downstream duct 434 by the blower 410.

As shown in fig. 1, the housing 110 includes a cover 117 detachable from the top wall 115. A substantially rectangular ejection port 465 is formed in the rectangular frame 463. When the user detaches the cover 117 from the top wall 115, the air filter unit 440 is exposed through the outlet 465. The user can take out the air filter unit 440 from the housing 110 through the take-out port 465. Thereafter, the user may clean the air filter portion 440 to remove lint. The user can install the cleaned air filter unit 440 in the housing 110 again through the outlet 465.

The water spray part 520 is formed between the rectangular frame 463 and the dehumidifying part 421 of the heat pump device 420.

Fig. 7 is a schematic bottom view of the heat exchanger 450. The water spray part 520 is explained with reference to fig. 3 and 7.

The water spray unit 520 includes a connection part 529 to which the water supply pipe 560 is attached, and a manifold 521 defining a flow path through which water supplied from the water supply pipe 560 flows. A plurality of small holes 522 are formed in the manifold 521. The plurality of small holes 522 are arranged in a row in the vicinity of the dehumidifying part 421 of the heat pump apparatus 420. The sprinkler 520 sprinkles water through the small hole 522 to clean the heat pump device 420.

Fig. 8 is a schematic perspective view of the heat exchanger 450. The treatment of water from the heat exchange unit 450 and the water spray unit 520 will be described with reference to fig. 2 to 4 and fig. 7 and 8.

The heat exchange portion 450 includes a lower cover portion 470 in addition to the heat pump device 420 and the upper cover portion 460. The lower cover part 470 forms a part of the circulation duct 430 in cooperation with the upper cover part 460. The lower cover part 470 includes: a 1 st container 471 for accommodating the air filter 440; a 2 nd container 472 for accommodating the dehumidifying part 421 and the heating part 422; and a 3 rd container 473 that houses the compressor 423.

A connection port 474 connected to the upstream pipe 433 upstream of the heat exchanger 450 is formed in the 1 st container 471. Air flows into the air filter portion 440 through the connection opening 474 by the suction force from the blower 410. The air filter unit 440 removes most of dust from the air flowing in through the connection port 474. However, some of the dust may reach the 2 nd container 472 through the air filter unit 440.

The distribution of the plurality of small holes 522 formed in the manifold 521 may be determined according to the design of the heat exchanging part 450. In the present embodiment, the density of the small holes 522 in the region opposite to the connection port 474 (in fig. 7, the right half of the manifold 522) is denser than that in other regions. Although relatively large amounts of dust adhere to the region of the dehumidifying part 421 facing the connection port 474, the density of the small holes 522 increases accordingly, and therefore the dust adhering to the dehumidifying part 421 is appropriately removed.

The dehumidifying part 421 dehumidifies the air passing through the air filtering part 440, and thus the dehumidifying part 421 is wet. As described with reference to fig. 4, the dehumidifying part 421 includes a plurality of fins 427 densely installed in the 1 st circulation pipe 425 where the low temperature working medium flows. Therefore, most of the dust passing through the air filter unit 440 is captured by the dehumidifier 421.

As described above, dust adhering to the dehumidifying part 421 is appropriately removed by spraying water from the water spraying part 520. The 2 nd container 472 includes a bottom wall 475 that supports the dehumidifying part 421 and the heating part 422, and is opposed to the water spray part 520. The bottom wall 475 appropriately receives water from the sprinkler portion 520 and water falling from the dehumidifying part 421. In the present embodiment, the 2 nd container 472 is exemplified as a water receiving portion.

The 2 nd container 472 includes a plurality of catching teeth 476 projecting upward from the bottom wall 475. A plurality of catching teeth 476 are formed between the 1 st container 471 and the dehumidifying part 421. The dust removed by the water spray from water spray unit 520 may contain long fibrous materials (e.g., hair). The catching teeth 476 can appropriately catch long fibrous materials.

Fig. 9 is a schematic plan view of the heat exchanger 450. The flow of water over the bottom wall 475 is explained with reference to fig. 3, 8, and 9.

The 2 nd tank 472 defines a main water discharge channel 477 adjacent to the dehumidifying part 421 and the heating part 422, and a water storage region 478 recessed between the main water discharge channel 477 and the 3 rd tank 473. The main drain line 477 is inclined downward toward the water storage region 478. Thus, water on the main drain line 477 is urged into the water storage region 478.

As shown in fig. 3, the washing machine 100 includes a transfer pipe 480 connected to the heat exchanger 450 and the washing tub 320. As shown in fig. 9, a connection portion 479 is formed in the water storage region 478. The transit tube 480 is connected to the connection portion 479. The water temporarily stored in the water storage area 478 is forced to enter the washing tub 320 through the connection portion 479 and the transit pipe 480 by gravity. In the present embodiment, the flow path of water defined by the bottom wall 475 and the relay pipe 480 is exemplified as a return water path.

As shown in fig. 8, the 2 nd container 472 includes a rib 491 supporting the dehumidifying part 421 and the heating part 422. The dehumidification section 421 and the heating section 422 are slightly separated upward from the bottom wall 475 by the rib 491. Therefore, even below the dehumidification section 421, water can flow smoothly on the bottom wall 475. Below the dehumidifier 42, the bottom wall 475 is inclined downward toward the main drain channel 477. Therefore, the water falling from the dehumidifier 421 flows into the main drain 477.

The rib 491 closest to the 1 st container 471 separates the area where the plurality of catching teeth 476 are formed from the area below the dehumidifying part 421. Therefore, the water from the water spray part 520 does not easily flow directly into the area below the dehumidifying part 421. Therefore, the long fibrous material removed from the dehumidifying part 421 is easily caught by the catching teeth 476.

The area where the plurality of catching teeth 476 are formed is inclined toward the 1 st container 471, so that the water from the sprinkler 520 flows toward the 1 st container 471. Thus, the long fibrous material removed from the dehumidifying part 421 is easily caught by the catching teeth 476.

As shown in fig. 8, the rib 491 closest to the 1 st container 471 is interrupted near the main water discharge channel 477, and defines an inflow port 492 that allows water to flow from the region where the plurality of catching teeth 476 are formed to the region below the dehumidifying part 421. The water from the sprinkler unit 520 flows into the area below the dehumidification unit 421 through the inflow port 492. Thereafter, the water flows into the transit pipe 480 through the main drain line 477 and the water storage region 478. In the present embodiment, three catching teeth 476 are formed at the boundary between the main water discharge channel 477 and the water storage region 478. Thus, clogging of the relay pipe 480 hardly occurs.

(drainage mechanism)

The drainage mechanism 600 is explained with reference to fig. 2 and 3.

The water discharge mechanism 600 includes, in addition to the circulation pump 610 and the water discharge valve 620, a connection pipe 631 extending downward from the lowest position of the 1 st peripheral wall 342 of the water tank 340 inclined upward toward the front wall 111, a water tank 632 connected to the lower end of the connection pipe 631, and a water discharge pipe 633 extending from the water tank 632 toward the rear wall 112 of the housing 110. The drain valve 620 is installed at the drain pipe 633. When the controller 200 opens the drain valve 620, the liquid in the washing tank 320 is drained from the housing 110 through the connection pipe 631, the water tank 632, and the drain pipe 633. In the present embodiment, a flow path of water defined by the connection pipe 631, the water tank 632, and the drain pipe 633 is exemplified as a drain path.

The drainage mechanism 600 further includes: a filter 640 disposed between the water tank 632 and the circulation pump 610; a 1 st circulation pipe 634 connected to the filtering apparatus 640 and the water storage tank 632; a suction line 635 connected to the filter device 640 and the circulation pump 610; and a 2 nd circulation pipe 636 connected to the circulation pump 610 and the water tank 340. The control part 200 operates the circulation pump 610 after closing the water discharge valve 620. The liquid in the washing tub 320 flows to the circulation pump 610 through the connection pipe 631, the water storage tank 632, the 1 st circulation pipe 634, the filter device 640, and the suction pipe 635 by the suction force generated by the circulation pump 610. The filter device 640 captures dust in the liquid flowing to the circulation pump 610. Therefore, dust flowing together with the tap water for cleaning the heat pump device 420 and dust separated from the laundry L in the washing process and the rinsing process are appropriately captured by the filter device 640. The circulation pump 610 returns the liquid cleaned by the filter device 640 to the water tank 340 through the 2 nd circulation pipe 636. In the present embodiment, the connection pipe 631, the water tank 632, the 1 st circulation pipe 634, the filter device 640, the circulation pump 610, the suction pipe 635, and the 2 nd circulation pipe 636 are exemplified as the circulation mechanism.

The water discharge mechanism 600 includes a transmission type photosensor 650 attached to the 1 st circulation duct 634. The light sensor 650 outputs an electrical signal corresponding to the transmission amount of light in the agitated water for the laundry L in the washing process. The transmitted amount of light is used as a parameter representing the contamination amount of the agitated water for the laundry L. In the present embodiment, the optical sensor 650 is exemplified as a measurement unit. The amount of contamination detected by the optical sensor 650 is exemplified as the physical properties of water.

(action of washing machine)

Fig. 10 is a schematic flowchart showing the operation of washing machine 100 in the washing step. Fig. 11 is a schematic block diagram of the washing machine 100. Fig. 12 is an exemplary graph showing the output from the light sensor 650. The operation of the washing machine 100 in the washing process will be described with reference to fig. 2 and 10 to 12.

(step S105)

If the user operates the console 201 to select one of the 1 st to 4 th operation courses, step S105 is started. In step S105, the controller 200 closes the 1 st water supply valve 511 and the drain valve 620 and opens the 2 nd water supply valve 512. Further, control unit 200 controls switching valve 540 to set the water supply path so that tap water supplied from water supply port 530 passes through detergent storage unit 550. Thereby, the tap water containing the detergent is efficiently supplied to the washing tub 320. Once the water supply to the washing tub 320 is started, step S110 is performed.

(step S110)

In step S110, control unit 200 determines whether or not the amount of water stored in washing tub 320 is a predetermined value. The set value related to the water storage amount in the washing tub 320 may be determined based on a parameter such as an input of a user using the console 201 or an amount of laundry stored in the washing tub 320. The amount of water supplied into washing tub 320 may be detected based on an elapsed time from the start of water supply or an output signal from a liquid level sensor (not shown) attached to washing tub 320. Step S110 continues until the amount of water stored in the washing tub 320 reaches a predetermined value. If the amount of water stored in the washing tub 320 is equal to or greater than a predetermined value, step S115 is performed.

(step S115)

In step S115, controller 200 closes 2 nd water supply valve 512 to interrupt water supply to washing tub 320. After that, step S120 is performed.

(step S120)

In step S120, control unit 200 operates circulation pump 610 and motor 310. Thereby, circulation of the mixed liquid between the washing tub 320 and the circulation pump 610 and agitation of the laundry in the washing tub 320 are started. After that, step S125 is executed.

(step S125)

In step S125, the control unit 200 starts timing. After that, step S130 is performed.

(step S130)

In step S130, the control unit 200 determines whether or not the 1 st measurement time has come, based on the published start time (which should be the start time) set in step S125. If the control unit 200 determines that the 1 st measurement time has come, step S135 is executed. Otherwise, the process proceeds to step S130.

(step S135)

In step S135, the control unit 200 stores the output value from the optical sensor 650. After that, step S140 is performed.

(step S140)

In step S140, the control unit 200 determines whether or not the 2 nd measurement time has come, based on the published start time (which should be the start time) set in step S125. If the control unit 200 determines that the 2 nd measurement time has come, step S145 is executed. In other cases, step S140 is continued.

(step S145)

In step S145, the control unit 200 acquires an output value from the optical sensor 650. After that, the control unit 200 performs a difference operation using the output value acquired in step S145 and the output value stored in step S135. After that, step S150 is performed.

(step S150)

In step S150, the control unit 200 determines the control content based on the result of the difference operation performed in step S145. After that, step S155 is executed.

(step S155)

In step S155, the controller 200 opens the 1 st water supply valve 511 and washes the heat pump device 420 through the water spray unit 520. After the heat pump apparatus 420 is cleaned for a predetermined period, the control part 200 closes the 1 st water supply valve 511. After that, step S160 is performed.

(step S160)

In step S160, the control unit 200 executes the control content determined in step S150. For example, if the control unit 200 determines in step S150 that the contamination level of the liquid in the washing tank 320 is too high, the circulation pump 610 may be stopped and the drain valve 620 may be opened. After the drain valve 620 is opened for a predetermined period, the control unit 200 may close the drain valve 620 and open the 2 nd water supply valve 512. This reduces the degree of contamination in the washing tub 320.

In the present embodiment, the optical sensor 650 is used to measure the physical properties of water. Alternatively, other detection elements may be used for measuring the physical properties of water. For example, the conductive sensor can be suitably used for detecting the concentration of detergent in water, or the kind of detergent.

In the present embodiment, the physical properties of water in the washing step are measured. Alternatively, the physical properties of the water in the rinsing step may be measured. For example, if the conductive sensor is used for measuring the physical properties of water, the detergent concentration in water can be detected in the rinsing process.

Fig. 13 is a schematic flowchart showing the operation of washing machine 100 in the rinsing step. The operation of washing machine 100 in the rinsing step will be described with reference to fig. 10, 11, and 13.

(step S205)

If the user operates the console 201 to select one of the 1 st to 3 rd operation courses, step S205 is started after the washing process. In step S205, the control part 200 closes the 2 nd water supply valve 512 and the drain valve 620 and opens the 1 st water supply valve 511. Thereby, the heat pump device 420 is cleaned. After the heat pump apparatus 420 is cleaned, step S210 is performed.

(step S210)

In step S210, control unit 200 closes water supply valve 1 511 and opens water supply valve 2 512. Further, the controller 200 controls the switching valve 540 to set the water supply path such that tap water supplied from the water supply port 530 bypasses the detergent storage unit 550. Thereby, the tap water is directly supplied to the washing tub 320. Once the water supply to the washing tub 320 is started, step S215 is performed.

(step S215)

In step S215, control unit 200 determines whether or not the amount of water stored in washing tub 320 is a predetermined value. The set value related to the water storage amount in the washing tub 320 may be determined based on a parameter such as an input of a user using the console 201 or an amount of laundry stored in the washing tub 320. The amount of water supplied into washing tub 320 may be detected based on an elapsed time from the start of water supply or an output signal from a liquid level sensor (not shown) attached to washing tub 320. Step S215 continues until the amount of water stored in the washing tub 320 reaches a predetermined value. If the amount of water stored in the washing tub 320 is equal to or greater than a predetermined value, step S220 is performed.

(step S220)

In step S220, controller 200 closes water supply valve 2 512 to stop the supply of water to washing tub 320. After that, step S225 is executed.

(step S225)

In step S225, control unit 200 operates circulation pump 610 and motor 310. Thereby, circulation between the washing tub 320 and the circulation pump 610 and agitation of the laundry in the washing tub 320 are started. After that, step S230 is performed.

(step S230)

In step S230, the control unit 200 starts timing. After that, step S235 is performed.

(step S235)

In step S235, the control unit 200 determines whether or not a predetermined cycle period has elapsed, based on the disclosure start time (which should be the start time) set in step S230. If the control section 200 determines that the specified cycle period has elapsed, step S240 is executed. In other cases, step S235 is continued.

(step S240)

In step S240, the control unit 200 opens the drain valve 620 and drains water from the washing tank 320. After the water is drained from the washing tub 320, step S245 is performed.

(step S245)

In step S245, the control part 200 counts the number of times of water discharge (i.e., the number of times the water discharge valve 620 is opened). If the number of times of water discharge reaches a designated value, the rinsing process is finished. In other cases, step S210 is performed.

As described with reference to fig. 10 and 13, the heat pump device 420 is cleaned (step S155 and/or step S205) before the washing operation (step S160) and/or the rinsing operation (step S225). Thus, the dust contained in the water for washing the heat pump device 420 is appropriately processed in the subsequent step S160 and/or step S225. Therefore, dust contained in the water used to wash the heat pump device 420 hardly adheres to the laundry.

Fig. 14A and 14B are schematic timing diagrams showing the opening and closing timings of the 1 st water supply valve 511 and the drain valve 620. The opening and closing timings of the 1 st water supply valve 511 and the drain valve 620 will be described with reference to fig. 10, 11, and 13 to 14B.

The control part 200 selectively opens the 1 st water supply valve 511 and the drain valve 620. That is, as described with reference to fig. 11 and 13, the controller 200 opens the 1 st water supply valve 511 and closes the drain valve 620. Alternatively, the control part 200 opens the drain valve 620 and closes the 1 st water supply valve 511. As shown in fig. 14A and 14B, the opening and closing operation of the 1 st water supply valve 511 may not be synchronized with the opening and closing operation of the drain valve 620. The 1 st water supply valve 511 may be closed after the drain valve 620 is opened as shown in fig. 14A. The 1 st water supply valve 511 may be closed before the drain valve 620 is opened as shown in fig. 14B. Since the 1 st water supply valve 511 is opened while the drain valve 620 is closed, water for washing the heat pump device 420 is effectively used for the washing process and/or the rinsing process.

(design of operation Process)

Fig. 15A and 15B are schematic diagrams showing a design pattern of an operation process. The design mode of the operation process will be described with reference to fig. 2, 15A, and 15B.

As shown in fig. 15A, when the user selects the 1 st to 4 th operation courses, the washing process is performed. The process of cleaning the heat pump device 420 may be embedded in the washing process.

As shown in fig. 15B, when the user selects the 1 st to 3 rd operation courses, the rinsing process is performed. The process of cleaning the heat pump apparatus 420 may be embedded in the rinsing process.

Fig. 16 is a schematic diagram showing various design patterns of the 2 nd operation process. Various design modes of the 2 nd operation process are explained with reference to fig. 2 and 16.

In fig. 16, a design pattern in which the process of cleaning the heat pump device 420 is embedded in the washing process is shown as a 1 st design pattern. A design pattern in which the step of cleaning the heat pump device 420 is embedded in the rinsing step is shown as a 2 nd design pattern. A design pattern additionally provided after the dehydration step in the step of cleaning the heat pump device 420 is shown as a 3 rd design pattern.

Fig. 17 is a schematic plot showing the operating time in the 1 st to 3 rd design modes. Fig. 18 is a schematic graph showing the amount of water used in the 1 st to 3 rd design modes. The operation time and the amount of water used in the 1 st to 3 rd design modes will be described with reference to fig. 2 and 16 to 18.

In design mode 1, the process of cleaning the heat pump device 420 is embedded in the washing process. Therefore, the water used for washing the heat pump device 420 is also used for washing the laundry in the washing tub 320. In the 2 nd design mode, the process of cleaning the heat pump apparatus 420 is embedded in the rinsing process. Thus, the water used to wash the heat pump device 420 is also used for rinsing the laundry in the washing tub 320. On the other hand, in design mode 3, the step of cleaning the heat pump device 420 is provided separately after the dehydration step. Therefore, the water used for washing the heat pump device 420 is discharged without being used in other processes.

In design mode 1, the heat pump device 420 is cleaned as part of the water supply process to the washing tank 320 in the washing process. Therefore, the operating time in the 1 st design mode becomes shorter than that in the 3 rd design mode. In addition, the amount of water used in the 1 st design mode is reduced as compared with the 3 rd design mode.

In design mode 2, the cleaning of the heat pump device 420 is used as part of the water supply process to the washing tub 320 in the rinsing process. Therefore, the operating time in the 2 nd design mode becomes shorter than that in the 3 rd design mode. In addition, the amount of water used in the 2 nd design mode is reduced as compared with the 3 rd design mode.

Fig. 19 is a schematic diagram showing various design patterns of the 5 th operation process. Various design modes of the 5 th operation procedure are explained with reference to fig. 2 and 16.

In fig. 19, a design pattern in which the process of cleaning the heat pump device 420 is embedded in the washing process is shown as a 1 st design pattern. A design pattern in which the step of cleaning the heat pump device 420 is embedded in the rinsing step is shown as a 2 nd design pattern. A design pattern additionally provided after the dehydration step in the step of cleaning the heat pump device 420 is shown as a 3 rd design pattern.

Fig. 20 is a schematic graph showing the amount of water used in the 1 st to 3 rd design modes. The amount of water used in the 1 st to 3 rd design modes will be described with reference to fig. 2, 19, and 20.

In design mode 1, the process of cleaning the heat pump device 420 is embedded in the washing process. Therefore, the water used for washing the heat pump device 420 is also used for washing the washing tub 320. In the 2 nd design mode, the process of cleaning the heat pump apparatus 420 is embedded in the rinsing process. Therefore, the water used for washing the heat pump device 420 is also used for rinsing the washing tub 320. On the other hand, in design mode 3, the step of cleaning the heat pump device 420 is provided separately after the dehydration step. Therefore, the water used for washing the heat pump device 420 is discharged without being used in other processes.

In design mode 1, the heat pump device 420 is cleaned as part of the water supply process to the washing tank 320 in the washing process. Thus, the amount of water used in the 1 st design mode is reduced as compared with the 3 rd design mode.

In design mode 2, the cleaning of the heat pump device 420 is used as part of the water supply process to the washing tub 320 in the rinsing process. Thus, the amount of water used in the 2 nd design mode is reduced as compared with the 3 rd design mode.

(embodiment 2)

Fig. 21 is a schematic sectional view of a washing machine 100A according to embodiment 2. The same reference numerals are given to the same features as those of embodiment 1. The description of embodiment 1 will be referred to for features to which the same reference numerals are attached. The washing machine 100A is explained with reference to fig. 9 and 21.

Washing machine 100A includes a transfer pipe 480A directly connected to water tank 632 from a connection portion 479 formed in water storage region 478 of heat exchanger 450. Thus, water used to clean the heat pump device 420 through the water spray part 520 is directly sent to the water storage tank 632 through the relay pipe 480A under the gravity.

The water sent to the water storage tank 632 is sent to the washing tub 320 by the circulation pump 610. At this time, the filter device 640 removes dust from the water used to clean the heat pump device 420. Unlike embodiment 1, the relay pipe 480A defines a water return path through which water for cleaning the heat pump device 420 is supplied to the washing tub 320 after passing through the filter device 640, and therefore, dust flowing into the washing tub 320 is reduced.

The above-described embodiment mainly has the following configuration.

A washing machine according to an aspect of the present invention has a drying function. The washing machine includes: a washing tank for washing the laundry; a heat exchanger which exchanges heat with air passing through the washing tub to form dry air for drying the laundry; a water spraying mechanism provided with a water spraying part for spraying water to the heat exchanger and cleaning the heat exchanger; and a water return path for returning the water ejected from the water spray part to the washing tank.

According to the above configuration, since the heat exchanger performs heat exchange with the air passing through the washing tub to generate the dry air, the laundry washed in the washing tub is appropriately dried. Since the water sprinkling mechanism sprinkles water from the sprinkling portion, dust separated from the laundry is appropriately removed from the heat exchanger. The washing machine can achieve high water utilization efficiency because the water ejected from the water sprinkling part returns to the washing tank through the water returning path.

In the above configuration, the washing machine may further include a control part controlling the washing tub and the watering mechanism according to a treatment mode of the laundry in the washing tub. The treatment mode may include a water agitation mode of agitating the laundry in the water supplied into the wash tank. The water sprinkling mechanism may sprinkle water to the heat exchanger under the control of the control part during the underwater agitation mode.

According to the above configuration, in the underwater agitation mode, the laundry is agitated together with the water in the washing tub. During the underwater agitation mode, the control section controls the watering mechanism to sprinkle water to the heat exchanger. The water ejected from the water spray unit is returned to the washing tub through the water return path, and is used for stirring the laundry. Therefore, the washing machine can achieve high water use efficiency.

In the above structure, the washing machine may further include a water supply part supplying the water. The sprinkler mechanism may include a 1 st water supply valve for opening and closing a 1 st water supply path from the water supply unit to the sprinkler unit. The control part may open the 1 st water supply valve during the underwater agitation mode.

According to the above-described structure, since the control part opens the 1 st water supply valve during the underwater agitation mode, water reaches the water spray part through the water supply part and the 1 st water supply path. The water ejected from the water spray unit is returned to the washing tub through the water return path, and is used for stirring the laundry. Therefore, the washing machine can achieve high water use efficiency.

In the above configuration, the washing machine may further include a measuring unit that measures a physical property of the water used for agitation of the laundry in the underwater agitation mode and transmits physical property information on the physical property to the control unit. The controller may open the 1 st water supply valve after determining the control content for the washing tub based on the physical property information.

According to the above configuration, the measuring unit measures the physical property of the water used for stirring the laundry in the underwater stirring mode. The measured physical property information on the physical property is transmitted from the measuring section to the control section. Since the control unit determines the control content based on the physical property information, it is possible to perform appropriate control of the washing machine. Since the control unit opens the 1 st water supply valve after the control content is determined, the water returned to the washing tub through the water returning path hardly affects the physical property information. Therefore, the control unit can determine appropriate control content.

In the above structure, the washing machine may further include: a detergent container for containing a detergent; and a 2 nd water supply path for guiding the water from the water supply part to the washing tank. The underwater agitation mode may include: a 1 st mode of agitating the laundry in a mixed liquid in which the water flowing in the 2 nd water supply path is mixed with the detergent; and a 2 nd mode of agitating the laundry at a detergent concentration lower than the 1 st mode. The control part may open the 1 st water supply valve in at least one of the 1 st mode and the 2 nd mode.

According to the above configuration, during the 1 st mode, the laundry is agitated in the mixed liquid in which the water flowing through the 2 nd water supply path for guiding the water from the water supply unit to the washing tub is mixed with the water contained in the detergent containing unit. Thus, the laundry is properly washed. During mode 2, laundry is agitated at a lower detergent concentration than in mode 1. Therefore, the detergent adhered to the laundry is appropriately reduced. Since the control part opens the 1 st water supply valve in at least one of the 1 st and 2 nd modes, the water returned to the washing tub through the water returning path is used for agitation of the laundry in the 1 st and/or 2 nd modes. Therefore, the washing machine can achieve high water use efficiency.

In the above structure, the washing machine may further include a 2 nd water supply valve opening and closing the 2 nd water supply path. The control part may open the 1 st water supply valve while the 2 nd water supply valve is closed.

According to the above structure, if the 2 nd water supply valve is closed, the water pressure of the water supply part connected to the 2 nd water supply path may be increased. Since the control part opens the 1 st water supply valve during the 2 nd water supply valve is closed, the water sprinkling part may sprinkle water to the heat exchanger under high water pressure. Therefore, the heat exchanger can be appropriately cleaned.

In the above configuration, the treatment mode may include a tank cleaning mode in which the washing tank is cleaned. The control part may open the 2 nd water supply valve to perform the tank cleaning mode.

According to the above structure, since the control part opens the 2 nd water supply valve to perform the tub cleaning mode, the washing tub is properly cleaned.

In the above structure, the control part may selectively open the 1 st and 2 nd water supply valves in the tank washing mode.

According to the above configuration, since the control section opens the 1 st water supply valve in the tank washing mode, water reaches the water spray section through the water supply section and the 1 st water supply path. The water ejected from the sprinkler unit is returned to the washing tub through the water return path and used for washing the washing tub. Therefore, the washing machine can achieve high water use efficiency. Since the control part selectively opens the 1 st and 2 nd water supply valves, the water sprinkling part may sprinkle water to the heat exchanger under high water pressure. Therefore, the heat exchanger can be appropriately cleaned.

In the above structure, the washing machine may further include: a frame for accommodating the washing tank; a drainage path for draining the water out of the frame; and a drain valve that opens and closes the drain path under the control of the control unit. The control part may selectively open the 1 st water supply valve and the drain valve.

According to the above configuration, since the control portion selectively opens the 1 st water supply valve and the drain valve, direct discharge of water ejected from the sprinkler portion is less likely to occur. Therefore, the washing machine can achieve high water use efficiency.

In the above structure, the washing machine may supply tap water to the water supply part.

According to the above structure, since tap water is used for washing the heat exchanger and stirring the laundry, a water distribution design in the washing machine can be simplified.

In the above structure, the washing machine may further include: a water receiving portion that receives the water ejected from the water sprinkling portion; and a transit pipe connected to the water receiving portion and the washing tank. The transit pipe may form the return water path.

According to the above configuration, since the relay pipe is connected to the water receiving portion that receives the water ejected from the water spraying portion and the washing tub, the water ejected from the water spraying portion is returned to the washing tub through the relay pipe. Therefore, the washing machine can achieve high water use efficiency.

In the above structure, the washing machine may further include: a circulation mechanism for making the water discharged from the washing tank flow into the washing tank again; a water receiving portion that receives the water ejected from the water sprinkling portion; and a transfer pipe for transferring the water from the water receiving part to the circulating mechanism. The transit pipe may form the return water path.

According to the above configuration, since the relay pipe is connected to the water receiving portion that receives the water ejected from the water sprinkling portion and the washing tub that causes the water discharged from the washing tub to flow into the washing tub again, the water ejected from the water sprinkling portion is returned to the washing tub through the relay pipe and the circulation mechanism. Therefore, the washing machine can achieve high water use efficiency.

In the above configuration, the circulation mechanism may include a filter device that removes dust from the water discharged from the washing tank.

According to the above configuration, since the filter device removes dust from the water discharged from the washing tub, dust can be appropriately removed from the water returned to the washing tub.

In the above structure, the washing machine may further include a circulation mechanism that makes the water discharged from the washing tub flow into the washing tub again. The circulation mechanism may include a filter device for removing dust from the water discharged from the washing tank.

According to the above structure, the circulation mechanism makes the water discharged from the washing tank flow into the washing tank again, so that the washing machine can achieve high water utilization efficiency. In addition, since the filter device removes dust from the water discharged from the washing tub, dust can be appropriately removed from the water returned to the washing tub.

Industrial applicability

The principle of the present embodiment is suitably applied to an apparatus for washing and drying laundry.

Claims (1)

1. A washing machine having a drying function, characterized by comprising:

a washing tank for washing the laundry;

a heat pump device for forming dry air for drying the clothes by using heat exchange between fins and the air passing through the washing tank;

a water spraying mechanism having a water spraying part for spraying water to the heat pump device and cleaning the heat pump device;

a water receiving unit that faces the water sprinkling unit and supports the heat pump device;

a transfer pipe for transferring water from the water receiving part to the washing tub;

a control unit for controlling the washing tub and the water spray mechanism according to a treatment mode for the laundry in the washing tub; and

a circulation mechanism for making the water discharged from the washing tank flow into the washing tank again,

the circulation mechanism includes a filter device for removing dust from the water discharged from the washing tank,

the heat pump apparatus includes a dehumidifying part that dehumidifies the air,

the water receiving part includes a bottom wall for receiving water sprayed from the water spraying part and water falling from the dehumidifying part above the washing tank, and a plurality of catching teeth protruding upward from the bottom wall, and defines a main drainage channel adjacent to the dehumidifying part and a water storage area recessed from the main drainage channel,

the water from the sprinkler portion and the dehumidification portion is guided to the water storage area via the main drainage path,

the transfer pipe is connected with the water storage area and the circulating mechanism, so that water stored in the water storage area passes through the transfer pipe under the action of gravity and then passes through the filtering device.