Washing and drying machine

Abstract

To provide a washing and drying machine allowing a filter to be widely cleaned.SOLUTION: A washing and drying machine comprises: an outer tank capable of storing liquid inside; an inner tank that is rotatably supported in the outer tank and stores laundry; a drying device to feed dry air to the laundry in the inner tank; a return duct in which the air returns from the outer tank to the drying device; a feed duct in which the air flows from the drying device to the inside of the inner tank; a secondary filter 50 that is provided in the return duct and captures foreign materials generated from the laundry; and a cleaning unit 60 having cleaning nozzles 62a to 62c to clean the secondary filter 50. The cleaning nozzles 62a to 62c inject cleaning water in a fan shape to the secondary filter 50.SELECTED DRAWING: Figure 9

Description

[Technical field]

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

[0002] The air circulating inside a washer-dryer contains foreign matter such as lint, and a filter is provided in the air circulation duct to capture the foreign matter. The captured foreign matter accumulates as washing and drying are repeated, and if the machine is continued to be used in this state, the filter becomes clogged, causing resistance and resulting in poor drying. To prevent the filter from becoming clogged, users have traditionally removed the filter from the air circulation duct and cleaned it. However, cleaning the filter is a complicated task, and various methods have been proposed for automatically cleaning the filter without removing it from the air circulation duct.

[0003] For example, Patent Document 1 describes a washer / dryer in which a water supply unit that supplies wash water to a filter is provided above the filter, and wash water is supplied to the filter from multiple wash nozzles provided in the water supply unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-78464 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the washer-dryer described in Patent Document 1, cleaning is performed by spraying cleaning water from the cleaning nozzles in a straight line in the vertical direction onto the filter, so cleaning water does not flow between adjacent cleaning nozzles, and captured foreign matter remains and accumulates, making it difficult to unclog the filter. In addition, one option is to increase the number of cleaning nozzles to minimize the area where cleaning water does not flow, but the amount of water sprayed from each cleaning nozzle decreases in inverse proportion to the increase in cleaning nozzles, resulting in a decrease in cleaning performance. In addition, if the number of cleaning nozzles is increased, the flows of cleaning water merge, making it impossible to clean the entire surface of the filter evenly, which ultimately causes the filter to become clogged.

[0006] SUMMARY OF THE PRESENT INVETION The present invention is intended to solve the above-mentioned problems in the prior art, and has an object to provide a washing / drying machine capable of cleaning a wide range of filters. [Means for solving the problem]

[0007] The present invention comprises an outer tub capable of storing liquid therein, an inner tub supported rotatably within the outer tub and in which laundry is stored, a drying device that sends dry air to the laundry in the inner tub, a return air duct that returns air from the outer tub to the drying device, a supply air duct that sends air from the drying device into the inner tub, and a cleaning unit provided in the return air duct and equipped with a filter that captures foreign matter generated by the laundry and a cleaning nozzle that cleans the filter, wherein the cleaning nozzle sprays cleaning water in a fan shape onto the filter. Effect of the Invention

[0008] According to the present invention, a washing / drying machine capable of washing a wide range of filters can be provided. [Brief description of the drawings]

[0009] [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]1 is a perspective view showing a tub cover removed from the outer tub, with the rotating drum and the outer tub partially cut away; [Figure 4] This is an oblique view of the outer tub with the rotating drum, primary filter, and secondary filter removed. [Diagram 5] 2 is a perspective view of the inside of the washer / dryer according to the embodiment, seen from the rear. FIG. [Figure 6] FIG. 2 is a top view showing the heat pump unit. [Figure 7] FIG. 2 is a perspective view showing the inside of the heat pump unit. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] 10 is a cross-sectional view taken along line XI-XI of FIG. 9. [Figure 12] FIG. 12 is an enlarged view of part A in FIG. [Figure 13] FIG. [Figure 14] FIG. 11 is an enlarged view of part B in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A washing and drying machine according to an embodiment of the present invention will be described in detail below with reference to the drawings. 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 maintains the watertightness between the inside of the outer tub 20 and the door 9. This prevents water leakage during washing, rinsing and spin-drying. The rotating drum 29 has a number of small holes 29a (see FIG. 3) 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 at the bottom of the water receiving section 54 to drain the wash water and the like accumulated in the outer tub 20.

[0013] Further, a heat pump unit 70 and a blower fan 2 (see FIG. 6) are provided under the outer tub 20. In the drying process, a hot air drying method is adopted in which air is circulated between the rotating drum 29 and the heat pump unit 70 by the blower fan 2 (see FIG. 6) 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. Furthermore, the washer / dryer 100 is equipped with a feed duct 25 (feed air passage) that guides the hot air to the blowing nozzle 24 (see FIG. 3) of the outer tub 20 to blow it into the rotating drum 29, and a return duct 26 (return air passage) 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 the 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 the second solenoid valve, water is supplied to a fabric softener input chamber (not shown) via a water supply pipe. By opening the 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 the fourth solenoid valve, water is supplied to a washing unit 60 (described later) via a water supply pipe.

[0015] Fig. 3 is a perspective view with the tank cover removed from the outer tank, and with the rotating drum and outer tank partially cut away. Note that Fig. 3 also cuts away parts of the side and bottom of the rotating drum 29 so that the members on the inner rear surface of the outer tank 20 can be seen. As shown in Fig. 3, 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.

[0016] Fig. 4 is a perspective view of the outer tub with the rotating drum, primary filter, and secondary filter removed. Fig. 4 shows a cutaway view of a portion of the side of the outer tub 20 and half of the right side of the rotating drum 29. Fig. 4 does not show the tub cover 20b. As shown in Fig. 4, an in-tank duct 21 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 to avoid the motor 28 (see Fig. 2) that drives the rotating drum 29.

[0017] 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.

[0018] A communication port 22 that communicates with the outside of the outer tank 20 is formed at the upper part of the back surface of 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 secondary filter 50 is also provided at the communication port 22. In FIG. 4, 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. In addition, 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 state, so that the ventilation resistance can be reduced. In addition, by configuring the filter as two sheets in the flow direction, the meshes can be overlapped in a planar manner, 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 together and maintaining stable air circulation.

[0019] The secondary filter 50, like the primary filter 40, is formed by integrally insert molding a mesh member 50b (only a part of which is shown in FIG. 4) made of metal or the like into a frame 50a made of synthetic resin. The secondary filter 50 has finer mesh than the primary filter 40.

[0020] The outer tub 20 is also provided with a cleaning unit 60 for cleaning the secondary filter 50. Cleaning water is sprayed from this cleaning unit 60 toward the secondary filter 50, thereby washing away lint (foreign matter) 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.

[0021] FIG. 5 is a perspective view of the inside of the washer / dryer according to this embodiment, seen from behind. 5, the return duct 26 is provided on the back surface of the outer tub 20, and has a duct portion 26a extending from the center to the left and right on the back surface of the outer tub 20, and a duct portion 26b extending from the upper portion to the lower heat pump unit 70 at the right end portion of the duct portion 26a. The duct portion 26b and the heat pump unit 70 are connected by a bellows tube 27a. In this manner, the return duct 26 is configured to avoid the motor 28.

[0022] 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.

[0023] Fig. 6 is a top view showing the heat pump unit, and Fig. 7 is a perspective view showing the inside of the heat pump unit. Figs. 6 and 7 show a state in which a blower fan 2 is attached to the heat pump unit 70. As shown in FIG. 6, the heat pump unit 70 dehumidifies and heats the high-temperature, high-humidity air that has passed through the laundry in the rotary drum 29 and been discharged from the outer tub 20 (see FIG. 5) during the drying operation to make it high-temperature, low-humidity. The dehumidified and heated warm air (dry air) passes through the feed duct 25 (see FIG. 5) and the discharge duct 24a (see FIG. 5) by the blower fan 2, and is blown onto the laundry in the rotary drum 29 from the blowing nozzle 24 (see FIG. 3) 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, and returns to the heat pump unit 70 through the return duct 26. Note that the heat pump unit 70 has been described as an example of a drying device, but instead of the heat pump unit 70, a water-cooling dehumidification mechanism may be used to cool and dehumidify the high-temperature, high-humidity air.

[0024] 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.

[0025] 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.

[0026] 7, the heat pump unit 70 includes a compressor 71, a condenser 72, a pressure reducing device 73, and an evaporator 74, and these devices are connected in sequence by refrigerant piping 75 to form a refrigerant circuit. The refrigerant flows through the compressor 71, the condenser 72, the pressure reducing device 73, and the evaporator 74 in this order, and then returns to the compressor 71.

[0027] An air passage 70d is formed inside the case 70a, which causes high-temperature, high-humidity air drawn in from a connection port 70b (see FIG. 6) to pass through an evaporator 74 and a condenser 72 and be drawn into the blower fan 2. Note that FIG. 7 shows the case 70a with the top lid removed.

[0028] FIG. 8 is a perspective view showing the cleaning unit. As shown in FIG. 8, the cleaning unit 60 is attached to the upper part of the secondary filter 50, and serves to wash away the lint trapped by the secondary filter 50 and clean the secondary filter 50.

[0029] 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 electromagnetic valve of the water supply unit 16 (see FIG. 2) via a water supply pipe (not shown).

[0030] Fig. 9 is a rear view of the cleaning unit, Fig. 10 is a bottom view of the cleaning unit, Fig. 11 is a cross-sectional view taken along line XI-XI in Fig. 9, and Fig. 12 is an enlarged view of part A in Fig. 11. Note that, although the cleaning nozzle 62a will be described as an example in Fig. 11, the other cleaning nozzles 62b and 62c have the same configuration, so the cleaning nozzle 62a will be described as a representative example. 9, the cleaning unit 60 has cleaning nozzles 62a, 62b, and 62c formed below a water supply port 61. Cleaning nozzle 62a is formed at the highest position of the three, cleaning nozzle 62c is formed at the lowest position of the three, and cleaning nozzle 62b is formed at a height intermediate between 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 cleaning water supplied from the water supply port 61 flows.

[0031] Moreover, all of the cleaning nozzles 62a to 62c are positioned vertically above the secondary filter 50. This allows cleaning water to be sprayed from the upper edge of the mesh member 50b of the secondary filter 50.

[0032] As shown in Fig. 10, the cleaning nozzles 62a to 62c are formed to protrude downward from a lower surface 63a that forms a flow path 63 (see Fig. 9). The cleaning nozzles 62a to 62c are formed at intervals in the approximately left-right direction. The intervals between adjacent cleaning nozzles 62a to 62c can be appropriately changed depending on the spray range (angle) of the cleaning water.

[0033] In this embodiment, the three cleaning nozzles 62a to 62c are provided, but the cleaning nozzles may be configured with two or four or more.

[0034] 11, the secondary filter 50 is disposed with the surface of the mesh member 50b inclined relative to the up-down direction (vertical direction). Moreover, the upper surface side of the mesh member 50b of the secondary filter 50 is located on the rear side, and the lower surface side of the mesh member 50b is located on the front side.

[0035] A cleaning nozzle 62a is located above the upper edge of the mesh member 50b of the secondary filter 50. A slit-shaped nozzle opening 62s is formed at the lower end (tip) of the cleaning nozzle 62a. The nozzle opening 62s is formed to open vertically downward. Cleaning water is sprayed downward from this nozzle opening 62s, and is discharged onto the surface (upper surface) of the mesh member 50b of the secondary filter 50 facing the rear side.

[0036] As shown in Fig. 12, the cleaning nozzle 62a is configured so that the installation angle of the mesh member 50b of the secondary filter 50 with respect to the opening direction S of the nozzle opening 62s is θ1. The installation angle θ1 is set to be equal to or greater than 5 degrees and less than 45 degrees. If the installation angle θ1 is less than 5 degrees, the cleaning water flows over the surface opposite to the foreign matter capture surface 50b2 that captures the lint 80, making it impossible to clean the secondary filter 50. If the installation angle θ1 is 45 degrees or greater, the cleaning water penetrates the mesh member 50b of the secondary filter 50 entirely, making it impossible to clean the entire surface of the mesh member 50b of the secondary filter 50.

[0037] In the drying process, air that has passed through the clothes (laundry) passes through the primary filter 40 and then the secondary filter 50, as shown by the outlined arrow in Fig. 11. At this time, lint 80 is captured on the front surface of the secondary filter 50 (the surface facing the primary filter 40). Furthermore, the foreign matter capture surface 50b2 of the secondary filter 50 where the lint (foreign matter) 80 is captured is set as the lower surface side (front surface side). Furthermore, cleaning water is sprayed downward from the opposite side (rear surface side) of the foreign matter capture surface 50b2.

[0038] FIG. 13 is a cross-sectional view showing a nozzle opening. 13, the cleaning nozzle 62a has a spherical tip. The spherical tip means that the inner wall surface 62s2 of the tip is formed by a spherical surface. As long as the inner wall surface 62s2 of the tip is spherical, the outer wall surface 62s1 of the tip may be of another shape, such as a square shape.

[0039] The nozzle opening 62s has an opening angle θ2 of 130 degrees or more. That is, the nozzle opening 62s is formed such that the length of the curved surface of the outer wall surface 62s1 is longer than the length of the curved surface of the inner wall surface 62s2. The nozzle opening 62s has two longitudinal ends each having a surface that is inclined outward with respect to the axial direction of the cleaning nozzle 62a. The angle between the surface at one end and the surface at the other end is set to 130 degrees or more. The upper limit of the opening angle θ2 is preferably set to less than 180 degrees.

[0040] However, since the amount of water sprayed from the washing nozzles 62a to 62c depends on the water supply pressure, depending on the installation environment (tap water pressure in each household), there is a possibility that the washing range will be narrowed due to insufficient water volume. In this way, when the amount of washing water is small, it can only be sprayed at an angle smaller than the set opening angle. In order to stably spray washing water over a wide range of 90 degrees or more even when the amount of water is small, the opening angle must be set to 130 degrees or more, which is larger than the above, in order to stably spray washing water over a wide range such as 90 degrees or more. For this reason, it is preferable to set the opening angle θ2 to 130 degrees or more in order to stably spray washing water over a wide range such as 90 degrees or more.

[0041] Fig. 14 is an enlarged view of part B in Fig. 10. The direction perpendicular to the left-right direction (the up-down direction on the paper) is the front-rear direction. Note that, in the following, the cleaning nozzle 62c will be described as an example, but the other cleaning nozzles 62a and 62b have the same configuration, so the cleaning nozzle 62c will be described as a representative example. As shown in Fig. 14, the nozzle opening 62s of the cleaning nozzle 62c is formed as a slit that is long in the left-right direction. When viewed from the front (axial direction) of the nozzle opening 62s (when the nozzle opening is viewed from the front), the nozzle opening 62s is formed such that the width W2 in the front-rear direction on both the left and right sides is narrower than the width W1 in the front-rear direction at the center in the longitudinal direction (left-right direction). In other words, the nozzle opening 62s is formed in an almond shape when viewed from the front.

[0042] By the way, if all the nozzle openings 62s are formed with the same width, the water will come out more strongly on the left and right. This is because the main flow is formed along the left and right walls, and tends to be weaker in the center. Therefore, in order to spray water evenly, the water volume can be increased by making the center wider and the water volume can be decreased by making the left and right sides narrower, so that the water can be sprayed evenly.

[0043] Therefore, by forming the cleaning nozzle 62c in the shape shown in FIG. 14, it becomes possible to spray the cleaning water 90 in a fan shape from each of the cleaning nozzles 62a to 62c to the secondary filter 50 as shown in FIG. 9. In this embodiment, the cleaning water 90 can be sprayed in a fan shape at an angle of 90 degrees or more from each of the cleaning nozzles 62a to 62c to the secondary filter 50. In addition, by spraying the cleaning water 90 in a fan shape, the cleaning water 90 can be sprayed between the cleaning nozzle 62a and the cleaning nozzle 62b and between the cleaning nozzle 62b and the cleaning nozzle 62c, and clogging of the secondary filter 50 can be suppressed. In addition, since it is not necessary to excessively increase the number of the cleaning nozzles 62a to 62c, it is possible to prevent a decrease in the amount of water from one cleaning nozzle and a decrease in cleaning performance. In addition, since the flows of cleaning water do not merge, it is possible to prevent the entire surface of the filter from being unable to be uniformly cleaned. Furthermore, by spraying the cleaning water 90 in a fan shape, the cleaning water 90 can be sprayed onto almost the entire secondary filter 50, including the upper part of the secondary filter 50, even if the cleaning nozzles 62a-62c are disposed close to the upper end 50b1 of the secondary filter 50. As a result, the height dimension of the cleaning unit 60 can be reduced, and the washer-dryer 100 can be configured to be compact.

[0044] In the washer / dryer 100 configured as described above, a cleaning process for the secondary filter 50 is executed, for example, during washing, during tub cleaning (between rinsing and spin-drying), and at the end of drying. In this cleaning process, a solenoid valve for filter cleaning is opened to supply water to the water supply port 61 of the cleaning unit 60. As a result, water is sprayed in a fan shape from the cleaning nozzles 62a to 62c onto the surface of the secondary filter 50 opposite the foreign matter trapping surface 50b2. As the cleaning water flows over the surface opposite the foreign matter trapping surface 50b2, the lint can be peeled off from the secondary filter 50 by the weight of the foreign matter (lint). The peeled off lint flows into the in-tub duct 21 together with the cleaning water, flows into the water receiving section 54 from the outlet of the in-tub duct 21, and is discharged outside the machine through the drain.

[0045] As described above, the washer / dryer 100 of this embodiment includes the outer tub 20 capable of storing washing water (liquid) therein, the rotary drum 29 rotatably supported in the outer tub 20 and accommodating the laundry 30, the dryer (heat pump unit 70 and blower fan 2) for sending dry air to the laundry 30 in the rotary drum 29, the return duct 26 for returning air from the outer tub 20 to the dryer, the feed duct 25 for sending air from the dryer into the rotary drum 29, the secondary filter 50 provided in the return duct 26 for capturing foreign matter generated from the laundry 30, and the cleaning unit 60 including the cleaning nozzles 62a-62c for cleaning the secondary filter 50. The cleaning nozzles 62a-62c spray cleaning water 90 in a fan shape onto the secondary filter 50 (see FIG. 9). This allows the secondary filter 50 to be cleaned over a wide range, and prevents clogging of the secondary filter 50.

[0046] In this embodiment, the inner wall surface at the tip of the cleaning nozzles 62a to 62c is spherical, and the nozzle openings 62s formed at the tip of the cleaning nozzles 62a to 62c are formed in a slit shape (see FIG. 13). By making the cleaning nozzles 62a to 62c spherical, pressure is applied evenly inside the cleaning nozzles 62a to 62c. At this time, by making the nozzle openings 62 of the cleaning nozzles 62a to 62c horizontally long, the cleaning water 90 is sprayed in a fan shape, making it possible to clean the secondary filter 50 over a wide area.

[0047] In this embodiment, when the nozzle opening 62s is viewed from the front, the width W2 on both sides is narrower than the width W1 at the center in the longitudinal direction of the nozzle opening 62s (see FIG. 14). This allows the cleaning water 90 to be sprayed evenly onto the secondary filter 50, making it possible to evenly clean the secondary filter 50.

[0048] In this embodiment, the opening angle θ2 of the nozzle opening 62s is equal to or greater than 130 degrees (see FIG. 13). This makes it possible to clean a wide area of ​​the secondary filter 50 even when the water supply pressure is low and the amount of water is small.

[0049] Incidentally, one method for cleaning the entire surface of the secondary filter 50 is to use one cleaning nozzle and spray cleaning water from a high position. However, in order to spray from a high position, the housing of the washer-dryer 100 needs to be made larger in size in accordance with the height of the cleaning nozzle. Also, there is a concern that the cleaning performance may decrease if the cleaning nozzle and the secondary filter are disposed apart. Therefore, in this embodiment, a configuration is provided with multiple cleaning nozzles 62a to 62c (see Figs. 9 and 10). This makes it possible to spray cleaning water 90 over a wide area from a position closer to the secondary filter 50 while suppressing the size of the housing of the washer-dryer 100.

[0050] In this embodiment, the installation angle θ1 of the secondary filter 50 with respect to the opening direction S of the nozzle opening 62s is set to be equal to or greater than 5 degrees and less than 45 degrees, the foreign matter capture surface 50b2 of the secondary filter 50 is positioned on the lower side, and the cleaning water 90 is sprayed from the opposite side of the foreign matter capture surface 50b2. This allows cleaning to be performed by two forces: the force of the cleaning water 90 penetrating the secondary filter 50 due to water pressure, and the water flow of the cleaning water 90 flowing along the surface of the secondary filter 50. Also, by positioning the foreign matter capture surface 50b2 on the lower side, lint (foreign matter) peels off due to its own weight, improving cleanability.

[0051] The present invention is not limited to the above-described embodiment, and various modified examples and application examples within the technical concept of the present invention are included in the scope of the present invention. Note that, in the above-described embodiment, the nozzle openings 62s of the cleaning nozzles 62a to 62c are formed to face vertically downward, but, for example, the left and right cleaning nozzles 62a and 62c may be configured to face outward in the left-right direction, and the central cleaning nozzle 62b may be configured to face vertically.

[0052] In the above embodiment, the nozzle openings 62s of the cleaning nozzles 62a to 62c have the same shape. However, the length and width of the slit shape may be changed for each of the cleaning nozzles 62a to 62c.

[0053] In addition, in the above embodiment, an example was given in which the secondary filter 50 was inclined, but the secondary filter 50 may be disposed vertically and cleaning water may be sprayed obliquely onto the surface opposite the foreign matter capture surface. [Explanation of symbols]

[0054] 2. Blower fan (drying device) 20 Outer tank 25 Supply duct (air supply duct) 26 Return duct (return air passage) 29 Rotating drum (inner tank) 40 Primary Filter 50 Secondary filter (filter) 50b Mesh member 50b2 Foreign object trapping surface 60 Cleaning Unit 62a, 62b, 62c Cleaning nozzle 62s Nozzle opening 62s2 Inner wall surface 70 Heat pump unit (drying device) 80 Lint (foreign matter) 90 Washing water S Opening direction

Claims

1. An outer tank capable of storing liquid therein; an inner tub that is rotatably supported within the outer tub and that accommodates laundry; A drying device for blowing dry air onto the laundry in the inner tub; a return air duct for returning air from the outer tub to the drying device; A supply air duct for supplying air from the drying device into the inner tank; a filter provided in the return air passage for capturing foreign matter generated from the laundry; a cleaning unit including a cleaning nozzle for cleaning the filter; The washing nozzle sprays washing water in a fan shape onto the filter.

2. The washing and drying machine according to claim 1, The tip of the cleaning nozzle is spherical, The washer / dryer is characterized in that the nozzle opening formed at the tip of the cleaning nozzle is formed in a slit shape.

3. The washing and drying machine according to claim 2, The washer / dryer, wherein the nozzle opening is narrower on both sides than on a central portion in a longitudinal direction of the nozzle opening when viewed from the front.

4. The washing and drying machine according to claim 2, The washer / dryer is characterized in that an opening angle θ2 of the nozzle opening is 130 degrees or more.

5. The washing and drying machine according to claim 1, A washing / drying machine having a plurality of the cleaning nozzles.

6. The washing and drying machine according to claim 2, A washing and drying machine characterized in that the installation angle θ1 of the filter with respect to the opening direction of the nozzle opening is greater than or equal to 5 degrees and less than 45 degrees, the foreign matter capture surface of the filter is the lower surface side, and cleaning water is sprayed from the opposite side to the foreign matter capture surface.

Images