Washing and drying machine

Abstract

To provide a washing and drying machine capable of increasing the arrangement height of a washing tank (and outer tank and an inner tank) without increasing the height of the whole washing machine.SOLUTION: A washing and drying machine comprises: an outer tank; a rotary drum 29 that is rotatably supported in the outer tank and stores laundry; a heat pump unit that is disposed under the outer tank and dries and heats air by a heat pump method; a feed duct that is a flow channel to feed the air dried and heated by the heat pump unit to inside of the outer tank; a return duct that is a flow channel to make the air fed from the feed duct to the inside of the outer tank return to the heat pump unit; a primary filter 40 and a secondary filter 50, which remove dust of the air returning to the heat pump unit by the return duct; an in-tank duct 21 and a filter case 71 that store the primary filter 40 and the secondary filter 50, respectively; and a cleaning unit 60 to clean the primary filter 40 and others with water. The in-tank duct 21 and the filter case 71 are disposed on a movable part side.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a washing and drying machine. [Background technology]

[0002] JP 2017-60790 A (Patent Document 1) is a background technique in this technical field. This publication states that "the washer / dryer of the present invention includes a water tub, a rotating drum, a first drainage path, a drainage valve, a heat exchanger, a sprinkling mechanism for cleaning the heat exchanger, a second drainage path, and a control unit. The control unit controls the sprinkling from the sprinkling mechanism to end at least before the drainage end step in a drainage start step in which the drainage valve is opened and a drainage end step in which the drainage valve is closed during drainage in at least one of the washing step and the rinsing step. This prevents clogging of the drainage path due to foreign matter contained in the washing water used to clean the heat exchanger" (see abstract).

[0003] Another background art is JP 2018-7938 A (Patent Document 2). This publication states that "the washer-dryer of this embodiment includes a water tub, a spin tub in which clothes are stored and which is disposed in the water tub, a hot water heater disposed in a position in the water tub where the wash water accumulates and which heats the wash water, a drying mechanism including a circulation fan that circulates and supplies hot air into the spin tub, and a control means for controlling a washing operation including a washing step, a rinsing step, and a spin-drying step, and a drying operation by the drying mechanism, and the control means is configured to be able to execute a washing and drying course in which a drying operation is performed after a washing operation, and executes a pre-heating operation in which the hot water heater is energized so that the output is lower than the output when the wash water is heated during the spin-drying step in the washing and drying course" (see abstract). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-60790 A [Patent Document 2] JP 2018-7938 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology disclosed in Patent Document 1, the heat pump unit, which is a large part and easily becomes large, is located above the washing tub. Also, the drying filter device that removes dust from the air is located on the non-movable fixed part outside the washing tub of the washing machine so that the user can remove it and clean it, and a member such as a bellows is required to suppress the vibration of the washing machine's moving part (washing tub, etc.) from being transmitted to the fixed part. Therefore, there is room for improvement in terms of increasing the height of the washing tub (outer tub and inner tub) without increasing the height of the entire washing machine by installing unnecessary parts above the washing tub. In Patent Document 2, the heat pump unit is located at the bottom of the washing tub, but as in Patent Document 1, the drying unit is located on the fixed part side, which requires extra components such as bellows, leaving room for improvement in terms of increasing the height of the washing tub (outer tub and inner tub) without increasing the height of the entire washing machine. Therefore, an object of the present invention is to provide a washing / drying machine in which the height of the washing tub (outer tub and inner tub) can be increased without increasing the height of the entire washing machine. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides an apparatus comprising an outer tub, an inner tub rotatably supported within the outer tub and containing laundry, a drying / heating device provided below the outer tub for drying and heating air using a heat pump system, a discharge flow path which supplies air dried and heated by the drying / heating device into the outer tub, a return flow path which returns the air supplied from the discharge flow path into the outer tub from inside the outer tub to the drying / heating device, a filter which removes dust from the air returning to the drying / heating device by the return flow path, a filter storage section which stores the filter, and a cleaning device which washes the filter with water, the filter storage section being provided on the movable section side. Effect of the Invention

[0007] According to the present invention, it is possible to provide a washing / drying machine in which the height of the washing tub (outer tub and inner tub) can be increased without increasing the height of the entire washing machine. Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0008] [Figure 1] 1 is an external perspective view showing a washing / drying machine according to an embodiment of the present invention; [Diagram 2] 2 is a schematic cross-sectional view of the right side showing the internal structure of the washer / dryer according to the embodiment. FIG. [Diagram 3] 2 is a perspective view of the inside of the washer / dryer according to the embodiment, seen from the rear. FIG. [Figure 4] FIG. 2 is a top view showing a heat pump unit of the washer / dryer according to the embodiment. [Diagram 5] FIG. 2 is a perspective view showing the inside of a heat pump unit of the washer / dryer according to the embodiment. [Figure 6] 2 is a perspective view of the washer / dryer according to the embodiment, with a tub cover removed from the outer tub, and the rotating drum and the outer tub partially cut away. FIG. [Figure 7] 2 is a perspective view of the washer / dryer according to the embodiment, with a rotating drum, a primary filter, and a secondary filter removed from an outer tub. FIG. [Figure 8] FIG. 2 is a perspective view of a primary filter of the washer / dryer according to the embodiment. [Figure 9] FIG. 2 is a perspective view showing a cleaning unit of the washer / dryer according to the present embodiment. [Figure 10] FIG. 2 is a rear view of the cleaning unit of the washer / dryer according to the embodiment. [Figure 11] 2 is a block diagram showing electrical connections of a control system of the washer / dryer according to the present embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A washer / dryer according to an embodiment of the present invention will be described in detail below with reference to the drawings. In the drawings referred to below, arrows indicating up / down, left / right, front / rear directions are appropriately added. These directions are directions as seen by a user standing in front of the washer / dryer, are for convenience, and are not intended to limit the present invention.

[0010] FIG. 1 is an external perspective view showing a washer / dryer according to this embodiment, and FIG. 2 is a schematic cross-sectional view of the right side showing the internal structure of the washer / dryer according to this embodiment. As shown in Fig. 1, the washer / dryer 100 is a drum-type washer / dryer, and the frame is formed by combining side panels 1a, mainly made of steel plates and resin molded products, and reinforcing materials (not shown) on the top of the base 1h, and a front cover 1c and a top cover 1e are further attached on top of that to form the housing 1. The front cover 1c is provided with a door 9 for inserting and removing laundry 30 (see Fig. 2).

[0011] As shown in FIG. 2, an outer tub 20 is provided inside the housing 1. The outer tub 20 can store washing water (liquid) therein, and its lower part is supported by a plurality of suspensions (not shown), and its upper part is suspended by a spring (not shown), so that the outer tub 20 is elastically supported inside the housing 1. A door 9 is opened and laundry 30 is put into a rotating drum 29 (inner tub) inside the outer tub 20. A fluid balancer 31 is provided on the outer periphery of the opening of the rotating drum 29 to reduce vibrations caused by imbalance of the laundry 30 during spin-drying. A plurality of lifters 33 for lifting up the laundry 30 are provided inside the rotating drum 29. The rotating drum 29 is directly connected to a motor 28 (drive unit) for driving the drum via a main shaft 35 connected to a metal flange 34 for the rotating drum.

[0012] A rubber bellows 10 made of an elastic body is attached to the opening of the outer tub 20. The bellows 10 serves to maintain the watertightness between the inside of the outer tub 20 and the door 3, thereby preventing water leakage during washing, rinsing and spin-drying. The rotating drum 29 has a number of small holes 29a (see Figure 4) on its side wall for centrifugal spin-drying and ventilation. A water receiving section 54 is provided at the bottom of the outer tub 20. A drainage path 55 is provided on the bottom surface of this water receiving section 54 to drain wash water and the like accumulated in the outer tub 20.

[0013] A heat pump unit 70 and a blower fan 2 (see FIG. 4) are provided below the outer tub 20. In the drying process, a hot air drying method is used in which air is circulated between the rotating drum 29 and the heat pump unit 70 by the blower fan 2 (see FIG. 4) to dry the air. In this embodiment, the drying device is composed of the blower fan 2 and the heat pump unit 70 that dehumidifies the circulating air and then heats it. The washer / dryer 100 also includes a feed duct 25 (discharge flow path) that guides the hot air to the blowing nozzle 24 (see FIG. 3) of the outer tub 20 to blow the hot air into the rotating drum 29, and a return duct 26 (return flow path) that returns the moist air discharged from the rotating drum 29 to the heat pump unit 70. The return duct 26 and the heat pump unit 70 are connected by a return bellows 27b.

[0014] The washer / dryer 100 also includes a water supply unit 16 that supplies water into the outer tub 20. Water is supplied to the water supply unit 16 from a water supply port 17 provided on the top surface of the washer / dryer 100. The water supply unit 16 also includes a plurality of solenoid valves including a water supply solenoid valve. That is, by opening a first solenoid valve, water is supplied to a powder detergent input chamber (not shown) and a liquid detergent input chamber (not shown) of the detergent case via a water supply pipe, and by opening a second solenoid valve, water is supplied to a fabric softener input chamber (not shown) via a water supply pipe. By opening a third solenoid valve, water is directly supplied to a water supply port (not shown) of the outer tub 20 via a water supply pipe, and by opening a fourth solenoid valve 74 (FIG. 11), water is supplied to a washing unit 60 (described later) via a water supply pipe.

[0015] Fig. 3 is a perspective view of the inside of the washer / dryer according to this embodiment, seen from the rear. As shown in Fig. 3, the return duct 26 is provided on the rear of the outer tub 20, and has a duct portion 26a extending from the center in the left-right direction on the rear of the outer tub 20, and a duct portion 26b extending from the upper part to the lower heat pump unit 70 at the right end of the duct portion 26a. The duct portion 26b and the heat pump unit 70 are connected by a bellows tube 27a. In this way, the return duct 26 is configured to avoid the motor 28.

[0016] The supply duct 25 has a duct portion 25a extending upward from the blower fan 2 arranged in parallel with the heat pump unit 70, and a duct portion 25b extending forward from the rear side at the upper part of the outer tub 20. The front end of the duct portion 25b is connected to the discharge duct 24a via a bellows tube 27c.

[0017] Fig. 4 is a top view showing the heat pump unit, and Fig. 5 is a perspective view showing the inside of the heat pump unit. Figs. 4 and 5 show a state in which a blower fan 2 is attached to the heat pump unit 70.

[0018] As shown in Fig. 4, the heat pump unit 70 (drying / heating device) uses a heat pump system to dehumidify and heat the high-temperature, high-humidity air that has passed through the laundry in the rotating drum 29 and been discharged from the outer tub 20 (see Fig. 5) during drying operation, to make it high-temperature, low-humidity. The dehumidified and heated warm air (drying air) passes through the delivery duct 25 (see Fig. 3) and the discharge duct 24a (see Fig. 3) by the blower fan 2, and is blown onto the laundry in the rotating drum 29 from the blowing nozzle 24 (see Fig. 6) provided at the top of the outer tub 20. The warm air blown onto the laundry becomes high-temperature, high-humidity air, passes through the primary filter 40 and the secondary filter 50 (described later), and returns to the heat pump unit 70 through the return duct 26.

[0019] The heat pump unit 70 has a box-shaped case 70a, and on the top surface of the case 70a, a connection port 70b to which the return duct 26 is connected and an air intake port 70c for taking air into the case 70a are formed. The blower fan 2 includes a fan casing 2a with a centrifugal impeller (not shown) therein, and a motor 2b that drives and rotates the centrifugal impeller. An air inlet formed in the fan casing 2a is configured to communicate with the inside of the case 70a.

[0020] 5, the heat pump unit 70 includes a compressor 81, a condenser 82, a pressure reducing device 83, and an evaporator 84, and these devices are connected in sequence by refrigerant piping 85 to form a refrigerant circuit. The refrigerant flows through the compressor 81, the condenser 82, the pressure reducing device 83, and the evaporator 84 in that order, and then returns to the compressor 81.

[0021] An air passage 70d is formed inside the case 70a, which passes high-temperature, high-humidity air drawn in from the connection port 70b (see FIG. 4) through the evaporator 84 and the condenser 82, and then is drawn into the blower fan 2. Note that FIG. 5 shows the case 70a with the top lid removed.

[0022] Incidentally, in order to make it easier for a user to put laundry in and take laundry out of the rotating drum 29 (inner tub), it is desirable to have a high height (arrangement height) of the rotating drum 29 (inner tub) and the outer tub 20 within the washer-dryer 100 without increasing the height of the entire washer-dryer 100. Therefore, equipment such as the heat pump unit 70, which tends to increase the size of the entire device, is placed below the rotating drum 29 (inner tank) and the outer tank 20, so that the positions of the rotating drum 29 (inner tank) and the outer tank 20 within the housing 1 can be relatively high.

[0023] On the other hand, a filter for removing dust is provided on the return duct 26 side so that the dust does not flow from inside the outer tank 20 into the heat pump unit 70 side. This filter can be removed and washed when a large amount of dust adheres to it. Therefore, in order to make it easy for a user to remove the filter, it is necessary to place the filter below the top cover 1e and above the outer tub 20, open the lid of the top cover 1e, remove the filter, clean it, and then store it back in its original position (see also Patent Documents 1 and 2).

[0024] Therefore, since the filter must be placed above the outer tub 20, there is a problem in that the height of the rotating drum 29 (inner tub) and the outer tub 20 cannot be increased without increasing the height of the entire washer-dryer 100. Furthermore, if the filter is provided on the fixed part side that does not move during the drying process and is located outside the device, such as the rotating drum 29 (inner tank) which becomes the movable part during the drying process, or the outer tank 20, it is necessary to connect the outer tank 20 side and the filter side with a member such as a bellows. That is, since these movable part side and fixed part side move relatively to each other during the drying process, in order to make it difficult for vibrations on the movable part side to be transmitted to the fixed part side, and also in order to pass all the air in the outer tank 20 through the filter and discharge it to the return duct 26 side, a member such as a bellows that connects the movable part side and the fixed part side in response to these movements is required.

[0025] However, providing such a bellows requires providing the bellows at the top of the washer-dryer 100, which means that extra parts are provided at the top of the washer-dryer 100, which is problematic as it hinders providing the rotating drum 29 (inner tub) and outer tub 20 as close to the top of the washer-dryer 100 as possible.

[0026] Hereinafter, a technique for solving the above-mentioned problems and enabling the height of rotating drum 29 (inner tub) and outer tub 20 to be increased within washer / dryer 100 without increasing the height of the entire washer / dryer 100 will be described. Fig. 6 is a perspective view with the tank cover removed from the outer tank, showing the rotating drum and the outer tank partially cut away. Note that Fig. 6 also shows parts of the side and bottom of the rotating drum 29 cut away to show the members on the inner rear surface of the outer tank 20.

[0027] As shown in Fig. 6, the outer tub 20 is composed of a cylindrical outer tub body 20a with a bottom, and a tub cover 20b provided at a front opening 20a1 of the outer tub body 20a. The tub cover 20b is provided with a flow path 20b1 through which the washing water pumped up by a circulation pump (not shown) passes. A watering nozzle 23 is formed at the end of this flow path 20b1, and is configured to discharge the washing water pumped up into the rotating drum 29. The tub cover 20b is also formed with an outlet nozzle 24 that blows out dry air. The outlet nozzle 24 is also formed with an outlet duct 24a. The outlet duct 24a is connected to a heat pump unit 70, which will be described later.

[0028] Fig. 7 is a perspective view of the outer tub with the rotating drum, primary filter, and secondary filter removed. Fig. 7 shows a cutaway view of part of the side of the outer tub 20 and half of the right side of the rotating drum 29. Fig. 7 does not show the tub cover 20b.

[0029] As shown in Fig. 7, an in-tank duct 21 (filter housing section) is provided on the rear surface (bottom surface) inside the outer tub 20. One end of this in-tank duct 21 is located at the upper portion of the outer tub 20, and the other end is located below half the height of the rear surface of the outer tub 20. The in-tank duct 21 is bent (generally arc-shaped) from the upper portion to the lower portion of the outer tub 20 in a manner that avoids the motor 28 (see Fig. 2) that drives the rotating drum 29.

[0030] A primary filter 40 is attached to the in-tank duct 21. The primary filter 40 is formed by integrally insert molding a mesh member 40b (only a part of which is shown in FIG. 4) made of metal or the like onto a frame portion 40a made of synthetic resin.

[0031] A communication port 22 that communicates with the outside of the outer tank 20 is formed at the upper part of the back surface inside the outer tank 20. A return duct 26 (see FIG. 2) is connected from the communication port 22 to the heat pump unit 70 (see FIG. 2) on the outside of the back surface of the outer tank 20. A filter case 71 (filter housing section) is provided in a region that communicates with the inlet part of the communication port 22 and the in-tank duct 21. A secondary filter 50 is provided in the filter case 71. In FIG. 7, the primary filter 40 is located at the front side in the front-rear direction, and the secondary filter 50 is located at the rear side (deep side). That is, the primary filter 40 and the secondary filter 50 are arranged so that their ventilation directions overlap with each other across the communication port 22. The primary filter 40 and the secondary filter 50 are configured to face each other, and the circulating air that has passed through the primary filter 40 passes through the secondary filter 50 without disturbing the flow, so that ventilation resistance can be reduced. In addition, by configuring the filter in two sheets in the flow direction, the mesh can be overlapped on a flat surface, and each mesh (opening) can be made coarser than in a single sheet configuration. This allows the lint to be collected across two sheets, preventing the lint from becoming densely packed and maintaining stable air circulation.

[0032] The secondary filter 50, like the primary filter 40, is formed by insert molding a synthetic resin frame 50a and a mesh member 50b (only a part of which is shown in FIG. 7) made of metal or the like. The secondary filter 50 has finer mesh than the primary filter 40. The outer tub 20 is also provided with a cleaning unit 60 (cleaning device) for cleaning the secondary filter 50. Cleaning water is sprayed from this cleaning unit 60 toward the secondary filter 50, thereby washing away lint (dust) captured by the mesh member 50b of the secondary filter 50. The cleaning water that has cleaned the secondary filter 50 passes through the in-tub duct 21 together with the lint, and is discharged from an outlet formed at the lower back surface of the outer tub 20. The cleaning water then flows into the water receiving portion 54 of the outer tub 20, and is discharged to the outside from a drain port (not shown) formed in the water receiving portion 54.

[0033] In this manner, the primary filter 40 and the secondary filter 50 are provided at the rear of the outer tub 20 . 8 is a perspective view of the primary filter. In this example, the primary filter 40 is plate-shaped and includes, for example, four mesh members 40b. The primary filter 40 also has an opening 72 that communicates with the secondary filter 50.

[0034] Fig. 9 is a perspective view showing the cleaning unit. As shown in Fig. 9, the cleaning unit 60 (cleaning device) is attached to the upper part of the secondary filter 50 to wash away lint (dust) captured by the secondary filter 50 and clean the secondary filter 50. The washing unit 60 has a water supply port 61 formed on the upper surface thereof for supplying washing water. The water supply port 61 is connected to a fourth solenoid valve 74 (FIG. 11) of the water supply unit 16 (see FIG. 2) via a water supply pipe (not shown).

[0035] Fig. 10 is a rear view of the cleaning unit. As shown in Fig. 10, the cleaning unit 60 has cleaning nozzles 62a, 62b, and 62c formed below a water supply port 61. The cleaning nozzle 62a is formed at the highest position of the three, the cleaning nozzle 62c is formed at the lowest position of the three, and the cleaning nozzle 62b is formed at a height position intermediate between the cleaning nozzles 62a and 62c. In addition, the cleaning unit 60 has a flow path 63 formed between the water supply port 61 and the cleaning nozzles 62a to 62c, through which the cleaning water supplied from the water supply port 61 flows.

[0036] Moreover, all of the cleaning nozzles 62a to 62c are positioned vertically above the secondary filter 50. This allows the cleaning water 90 to be sprayed from the upper edge of the mesh member 50b of the secondary filter 50.

[0037] 11 is a block diagram showing the electrical connections of the control system of the washer / dryer. The washing control unit 73 is composed of a microcomputer and the like, and is connected to a fourth solenoid valve 74 (washing device) and a drum driving motor 28 (washing device) via a predetermined interface. The secondary filter 50 is cleaned by the cleaning control unit 73 controlling the fourth solenoid valve 74 to spray cleaning water 90 from the cleaning nozzles 62a, 62b, and 62c. The primary filter 40 is cleaned by having the cleaning control unit 73 rotate the rotating drum 29 (inner tank) using the drum drive motor 28 to splash the water stored in the outer tank 20 onto the primary filter 40 when cleaning the secondary filter 50.

[0038] As an example of the timing of these cleaning operations, the cleaning control unit 73 cleans the secondary filter 50 before the main washing step of the washing process. Also, the cleaning control unit 73 cleans the primary filter 40 and the secondary filter 50 before the spin-drying step following the main washing step and the rinsing step. In this way, it is preferable to clean these filters after every wash.

[0039] 9 and 10, the secondary filter 50 is removable together with the lid 75, which is integrated with the cleaning nozzles 62a, 62b, and 62c, located above the secondary filter 50. The lid 75 is provided on the top cover 1e (FIG. 1), but since the secondary filter 50 is provided on the back of the outer tub 20 body, even if the lid 75 is removed to remove the secondary filter 50, it is not necessary to allocate a large space above the washer / dryer 100, and there is no problem in disposing the outer tub 20 at the top of the housing 1. In addition, since the in-tub duct 21 (filter housing) communicates with the filter case 71 (filter housing), the primary filter 40 can also be removed by removing the lid 75.

[0040] In this way, since the primary filter 40 and the secondary filter 50 can be removed, even if dust on the primary filter 40 and the secondary filter 50 due to long-term use cannot be completely removed by cleaning using the cleaning control unit 73, the primary filter 40 and the secondary filter 50 can be cleaned. Additionally, the primary filter 40 and the secondary filter 50 are held down from above by the lid 75 to ensure airtightness. In other words, the circulating air flowing from the outer tank 20 side to the return duct 26 side is unlikely to leak from the lid 75 side, so that the primary filter 40 and the secondary filter 50 can accurately remove dust from the circulating air.

[0041] 8, the primary filter 40 is formed with openings 72. Therefore, even if the mesh member 40b of the primary filter 40 becomes clogged with dust, the circulating air flows through the openings 72 to the secondary filter 50, so that the dust can be appropriately removed from the circulating air. Further, the in-tank duct 21 and the filter case 71 form a filter housing section, the primary filter 40 forms a wall section on the circulating air inlet side of the filter housing section, and the secondary filter 50 is provided in the filter housing section. Therefore, it is possible to increase the area of ​​the filter while mounting a plurality of filters.

[0042] Next, the effects of this embodiment will be described. The primary filter 40 and the secondary filter 50 are provided in the outer tub 20. Therefore, as described above, the filters are provided on the side that becomes the movable part in the drying process, and are not provided on the fixed part side that does not move in the drying process. Therefore, there is no need to connect the outer tub 20 side and the filter side with a member such as a bellows. Therefore, there is no need to provide a part such as a bellows on the upper part of the washer-dryer 100, and the outer tub 20 and the rotating drum 29 (inner tub) can be provided on the upper part of the washer-dryer 100 without increasing the height of the entire washer-dryer 100. In order to absorb the relative movement between the movable part side and the fixed part side, a return bellows 27b (FIG. 2) is provided on the lower part of the washer-dryer 100.

[0043] 11, the primary filter 40 and the secondary filter 50 are automatically washed. Therefore, there is no need to place the primary filter 40 and the secondary filter 50 on the upper part of the outer tub 20 and the rotating drum 29 (inner tub) in order to remove and manually wash the primary filter 40 and the secondary filter 50. Therefore, the outer tub 20 and the rotating drum 29 (inner tub) can be provided on the upper part of the washer-dryer 100 without increasing the height of the entire washer-dryer 100. Further, the primary filter 40 and the secondary filter 50 are provided at the rear of the outer tub 20. That is, the filters are provided not at the top of the outer tub 20 but at the rear of the washer-dryer 100, where there is relatively more space, so that the outer tub 20 and the rotating drum 29 (inner tub) can be provided at the top of the washer-dryer 100 without increasing the overall height of the washer-dryer 100.

[0044] In addition, the primary filter 40 and the secondary filter 50 can be removed by opening the lid 75, so that the primary filter 40 and the secondary filter 50 can be cleaned even if dust on the primary filter 40 and the secondary filter 50 cannot be completely removed by cleaning using the cleaning control unit 73 after long-term use. Additionally, the primary filter 40 and the secondary filter 50 are held down from above by the lid 75 to ensure airtightness. Therefore, the circulating air flowing from the outer tank 20 side to the return duct 26 side is unlikely to leak from the lid 75 side, and the primary filter 40 and the secondary filter 50 can accurately remove dust from the circulating air.

[0045] 8, the primary filter 40 is formed with openings 72. Therefore, even if the mesh member 40b of the primary filter 40 becomes clogged with dust, the circulating air flows through the openings 72 to the secondary filter 50, so that the dust can be appropriately removed from the circulating air. Further, the in-tank duct 21 and the filter case 71 form a filter housing section, the primary filter 40 forms a wall section on the circulating air inlet side of the filter housing section, and the secondary filter 50 is provided in the filter housing section. Therefore, it is possible to increase the area of ​​the filter while mounting a plurality of filters.

[0046] The present invention is not limited to the above-described embodiment, but includes various modified examples. For example, the above-described embodiment has been described in detail to easily explain the present invention, and the present invention is not necessarily limited to the embodiment having all of the described configurations. [Explanation of symbols]

[0047] 20 Outer tank 21 Duct inside the tank (filter housing) 25 Feed duct (discharge flow path) 26 Return duct (return flow path) 28 Motor (cleaning device) 29 Rotating drum (inner tank) 40 Primary filter (filter) 50 Secondary filter (filter) 60 Cleaning unit (cleaning device) 62a, 62b, 62c Cleaning nozzle 70 Heat pump unit (drying / heating device) 71 Filter case (filter housing) 72 Opening 73 Cleaning control section 74 4th solenoid valve (cleaning device) 75 Lid 100 Washer / dryer

Claims

1. The outer tank and an inner tub that is rotatably supported within the outer tub and that accommodates laundry; A drying / heating device that is provided under the outer tank and dries and heats air by a heat pump system; a discharge flow path which supplies the air dried and heated by the drying and heating device into the outer tank; a return flow path that is a flow path for returning the air supplied from the discharge flow path into the outer tank from inside the outer tank to the drying / heating device; a filter for removing dust from the air returning to the drying / heating device through the return flow path; a filter storage section that stores the filter; A cleaning device for cleaning the filter with water, The filter storage section is provided on the movable section side. A washer / dryer characterized by the above.

2. 2. The washing / drying machine according to claim 1, wherein the filter storage section is provided at a rear portion of the outer tub itself.

3. 2. The washing and drying machine according to claim 1, wherein the filter is detachable together with a cover body integrated with a cleaning nozzle that sprays water from the cleaning device.

4. 4. The washing / drying machine according to claim 3, wherein the filter is held down from above by the lid to ensure airtightness.

5. The filter may include a primary filter located upstream of the air flow; a secondary filter located downstream of the primary filter in the air flow, 2. The washing / drying machine according to claim 1, wherein the primary filter has an opening communicating with the secondary filter.

6. The primary filter forms a wall of the filter housing. The washing / drying machine according to claim 5, wherein the secondary filter is provided in the filter housing portion.

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