Washing and drying machine

Abstract

To provide a washing and drying machine having further improved performance of washing a filter for collecting lint.SOLUTION: A washing and drying machine 100 includes an outer tank 20 in which washing liquid is stored, an overflow port 20b3 disposed at a side peripheral plate 20b of the outer tank 20, a drum 29 in which laundry 30 is washed or dried, an in-tank duct 21 disposed at inner back face of the outer tank 20, and a filter 40 attached to the in-tank duct 21 to collect lint. A rib 20b4 is disposed above the overflow port 20b3.SELECTED DRAWING: Figure 6A

Description

[Technical Field]

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

[0002] 2. Description of the Related Art As a washing / drying machine capable of performing washing and drying in succession, there is a drum-type washing / drying machine in which a drum rotates around a rotation axis in a substantially horizontal direction. To dry clothes in a drum-type washer-dryer, high-temperature air is created using a fan and a heat source such as a heater or heat pump, and this air is then blown into the washing tub, raising the temperature of the clothes and evaporating the moisture from them. The dehumidifying section then removes moisture from the circulating air. This process is repeated, or the air is exchanged between inside and outside the machine, bringing in outside air with a lower absolute humidity to speed up the drying of clothes.

[0003] Incidentally, the air circulating inside the washer-dryer contains foreign matter such as lint, and the outer tub is provided with a filter for capturing foreign matter such as lint by filtering. The trapped foreign matter accumulates in the filter as the washing and drying cycle is repeated. If washing and drying continues in this state, the filter becomes clogged, which creates resistance to the circulation of dry air, preventing the dry air from reaching the wet clothes, resulting in poor drying of the clothes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2022-174349 Summary of the Invention [Problem to be solved by the invention]

[0005] To prevent the filter from becoming clogged with lint and other foreign matter, cleaning water is stored in an outer tank, and the filter is automatically cleaned by being scooped up by a drum lifter as the drum rotates and hitting the filter with the cleaning water. To ensure the cleaning performance of the filter, it is important to keep lifting a certain amount of water with the lifter. However, some of the lifted water falls down along the saw cover at the front of the outer tub after the filter is cleaned, and falls near the overflow outlet.

[0006] The present invention has been made to solve the above-mentioned problems, and has an object to provide a washer / dryer that further improves the cleaning performance of a filter that collects lint. [Means for solving the problem]

[0007] The washing / drying machine of the present invention comprises an outer tub for storing washing liquid, an overflow port provided on the side peripheral panel of the outer tub, a drum for washing or drying laundry, an in-tub duct provided on the inside back surface of the outer tub, and a filter attached to the in-tub duct for collecting lint, and a rib provided above the overflow port. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a washing / drying machine in which the cleaning performance of the filter that collects lint is further improved. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an external perspective view of a washer / dryer according to a first embodiment, viewed from diagonally above the front. [Figure 2] 1 is a schematic cross-sectional view of the internal structure of a washer / dryer according to a first embodiment, viewed from the right side. [Figure 3] FIG. 2 is a perspective view of the rotating drum and outer tub with the tub cover removed from the outer tub and a portion cut away. [Figure 4] This is a perspective view of the rotating drum, primary filter, and secondary filter removed from the outer tank, viewed from the front right corner. [Figure 5] Front view of the outer tub with the tub cover and rotating drum removed. [Figure 6A] FIG. 10 is a perspective view of the outer tub with the tub cover and outer tub body removed, viewed from the right rear. [Figure 6B]Enlarged view of part I in Figure 6A. [Figure 7] FIG. 11 is a schematic cross-sectional view of the front part of the internal structure of a washer / dryer according to a second embodiment, viewed from the left side. [Figure 8] A view of the area around the overflow port from the center of the rotating drum. [Figure 9A] FIG. 10 is a view of the vicinity of the leak-proof rib and overflow port of the first modified example of the second embodiment viewed from above. [Figure 9B] FIG. 10 is a view of the vicinity of the leak-proof rib and overflow port of the second modification of the second embodiment viewed from above. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A washing / drying machine according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. <<First Embodiment>> Fig. 1 is an external perspective view of the washer-dryer 100 according to the first embodiment, viewed from diagonally above the front. Fig. 2 is a schematic cross-sectional view of the internal structure of the washer-dryer 100 according to the first embodiment, viewed from the right side.

[0011] The washer / dryer 100 shown in FIG. 1 is a drum-type washer / dryer in which a rotary drum 29 rotates around a rotation axis O (FIG. 2) that is substantially horizontal. The washer-dryer 100 has a frame formed by combining side panels 1a, made mainly of steel plates and resin molded parts, and reinforcing materials (not shown), which are fitted and fixed with screws to the top of the base 1h. The housing 1 is formed by attaching a front cover 1c and a top cover 1e to the frame by fitting them together or with round head screws.

[0012] Near an opening 1c1 (see FIG. 2) formed in the front cover 1c, a door 9 that is opened and closed when the user puts in or takes out laundry 30 is supported at one end so as to be rotatable horizontally.

[0013] <Outer tub 20 and rotating drum 29> 2, a cylindrical outer tub 20 with a bottom and an opening 20k at the front is provided inside the housing 1. The opening 20k faces slightly upward. The outer tub 20 stores wash water and rinse water. The outer tub 20 has a short cylindrical outer tub body 20a with a bottom extending from the center to the rear, and a short cylindrical tub cover 20b at the front. The short cylindrical tub cover 20b matches the outer shape of the outer tub body 20a and is fixed to the outer tub body 20a by bolting.

[0014] A cylindrical rotating drum 29 with a bottom and an opening 29k at the front is supported inside the outer tub 20 so as to be rotatable around a rotation axis O with the front facing slightly upward. The rotating drum 29 is directly driven by a motor 28. More specifically, a metal flange 34 for supporting the rotating drum is fixed to the back of the rotating drum 29. A main shaft 35 connected to the metal flange 34 serves as the rotation shaft of the motor 28 for driving the drum, thereby directly driving the rotating drum 29.

[0015] Figure 3 is a perspective view with the tank cover 20b removed from the outer tank 20 and the rotating drum 29 and outer tank 20 partially cut away. In Figure 3, parts of the side and rear surfaces of the rotating drum 29 are cut away so that the members on the inner rear surface of the outer tank 20 can be seen.

[0016] Rotating drum 29 has many small holes 29a (see FIG. 3) on its peripheral side wall for centrifugal dehydration and ventilation. Also, inside rotating drum 29, a plurality of lifters 33 are provided parallel to rotation axis O (see FIG. 2) for picking up and dropping laundry 30 to beat it. FIG. 2 shows an example in which there are four lifters 33.

[0017] <Support for outer tank 20> The outer tub 20 shown in FIG. 2 has its lower portion elastically supported by a plurality of suspensions (not shown), and its upper portion elastically supported in the center of the housing 1 by a tension coil spring (not shown). The suspension contains a compression coil spring and a damper filled with a viscous fluid. The suspension, whose dynamic behavior is expressed by an equation of motion using a spring constant and a viscosity coefficient, damps and isolates large whirling vibrations at the natural frequency of the rotating drum 29 when it rotates at high speed during the spin-drying process.

[0018] <Fluid balancer 31> An annular fluid balancer 31 filled with fluid is provided on the outer periphery of the opening of the rotating drum 29. When the laundry 30 on the rotating drum 29 rotates at high speed during spin-drying, the fluid inside the fluid balancer 31 moves to the opposite side of the imbalance of the laundry 30, thereby reducing vibration. The internal fluid is preferably one with a high specific gravity and high vibration-damping performance.

[0019] Bellows 13 is attached to opening 20k (see FIG. 2) of outer tub 20 to seal the wash water and rinse water in outer tub 20 between outer tub 20 and door 9. In other words, bellows 13 plays a role in maintaining watertightness between the inside of outer tub 20 and door 9. Bellows 13 prevents water leakage during the washing, rinsing and spin cycles in washer-dryer 100. The bellows 13 is made of a soft and flexible rubber material, such as natural rubber, silicone rubber, or butyl rubber.

[0020] 2, a water receiving portion 54 is provided at the bottom of the outer tub 20. A drainage path 55 for draining the wash water and the like stored in the outer tub 20 is provided at the bottom of the water receiving portion 54. When a user wants to do laundry, he or she opens the door 9 and places laundry 30, such as clothes, into the rotating drum 29 inside the outer tub 20. In this way, the laundry 30 is stored inside the rotating drum 29, and the washing, rinsing, and drying processes are carried out.

[0021] <Drying function> A heat pump unit 80, which is a heat source for the drying function, and a blower fan (not shown) are provided below the outer tub 20. The blower fan sends the warm air created by the heat pump unit 80 into the outer tub 20. In the drying process of the first embodiment, a hot air drying method is used in which air is circulated between the rotary drum 29 and the heat pump unit 80 by a blower fan (not shown) to dry the material.

[0022] In the first embodiment, the drying device used in the drying step is made up of a blower fan and a heat pump unit 80 that dehumidifies and then heats circulating air. The washer / dryer 100 shown in FIG. 2 includes a feed duct (not shown) that guides warm air to the blow-out nozzle 24 (see FIG. 3) of the outer tub 20, and a return duct 26 (see FIG. 2) in order to blow warm air into the rotary drum 29.

[0023] A primary filter 40 and a secondary filter 50 for capturing lint are provided between the rotary drum 29 and the return duct 26 shown in Figure 2. The mesh of the primary filter 40 is coarser than that of the secondary filter 50. The return duct 26 is an air passage that returns the moist air discharged from the rotary drum 29 through the primary filter 40 and the secondary filter 50 to the heat pump unit 80 . The return duct 26 and the heat pump unit 80 are connected by an expandable bellows 27b (see FIG. 2). The bellows 27b is provided to expand and contract so as not to transmit vibrations of the outer tub 20 to the heat pump unit 80.

[0024] <Water supply and detergent dispenser function> The washer-dryer 100 shown in Fig. 2 includes a water supply unit 16 that supplies water to the outer tub 20. Water is supplied to the water supply unit 16 from a water supply hose (not shown) attached to a water supply port 17 provided at the rear of the top surface of the washer-dryer 100. The water supply unit 16 is configured to include a plurality of solenoid valves, including a water supply solenoid valve, for dispensing powder detergent, liquid detergent, fabric softener, and the like.

[0025] Specifically, the water supply unit 16 supplies water to the powder detergent dispenser chamber (not shown) and the liquid detergent dispenser chamber (not shown) of the detergent case via a water supply pipe by opening a first solenoid valve (not shown). The water supply unit 16 supplies water to the fabric softener dispenser chamber (not shown) via a water supply pipe by opening a second solenoid valve (not shown). The water supply unit 16 also supplies water directly to the water supply port (not shown) of the outer tub 20 via a water supply pipe by opening a third solenoid valve (not shown). The water supply unit 16 supplies water to the washing unit 60 via a water supply pipe by opening a fourth solenoid valve (not shown).

[0026] As described above, the outer tub 20 shown in Fig. 3 has a cylindrical outer tub body 20a with a bottom and a tub cover 20b provided at the front opening 20a1 of the outer tub body 20a. The tub cover 20b is provided with a flow path 20b1 (see Fig. 3) through which wash water pumped up by a circulation pump (not shown) passes.

[0027] 3, a water sprinkler nozzle 23 is formed above the flow path 20b1. Wash water pumped up from the water sprinkler nozzle 23 is discharged into the rotary drum 29. The tank cover 20b is formed with a blowout nozzle 24 (see FIG. 3) through which dried air is blown out by a heat pump unit 80 (see FIG. 2). A discharge duct 24a (see FIG. 3) is connected to the blowout nozzle 24. The discharge duct 24a is connected to the heat pump unit 80 (see FIG. 2).

[0028] Figure 4 is a perspective view of the outer tub 20 with the rotating drum 29, primary filter 40, and secondary filter 50 removed, viewed from the front right corner. Note that Figure 4 shows a state in which part of the side wall of the outer tub 20 and half of the right side wall of the rotating drum 29 are cut away. Also, Figure 4 does not show the tub cover 20b.

[0029] FIG. 5 is a front view of the outer tub 20 with the tub cover 20b and the rotary drum 29 removed. 4, an in-tank duct 21 is provided on a back plate 20s inside the outer tub 20. One end of the in-tank duct 21 is formed in the upper part of the outer tub 20, and the other end is formed below half the height of the back plate 20s of the outer tub 20.

[0030] As shown in FIG. 2, the in-tank duct 21 is bent from the upper part to the lower part behind the outer tub 20 so as to avoid the motor 28 that drives the rotary drum 29.

[0031] 2 and 5, a primary filter 40 for collecting lint from clothes is attached to the in-tub duct 21. The primary filter 40 shown in Fig. 4 is formed by insert molding a mesh member 40b (only a part of which is shown in Fig. 4) made of metal or the like into a frame 40a made of synthetic resin.

[0032] 4, a communication port 22 is formed in the upper part of the back surface of the outer tub 20, which serves as an air passage communicating with the outside of the outer tub 20. A return duct 26 (see FIG. 2) is provided on the outer back surface of the outer tub 20 from the communication port 22 (see FIG. 4) to the heat pump unit 80 (see FIG. 2).

[0033] <Primary filter 40 and secondary filter 50> The communication port 22 shown in FIG. 4 is provided with a secondary filter 50 (see FIG. 2). As shown in FIG. 2, the primary filter 40 is located on the front side in the front-rear direction, and the secondary filter 50 is located on the rear side (deep side). That is, the primary filter 40 and the secondary filter 50 are arranged in the front-rear direction with the communication port 22 shown in Figs. 4 and 2 interposed therebetween so that their airflow directions overlap.

[0034] Furthermore, the primary filter 40 and the secondary filter 50 are configured to face each other in the front-to-rear direction (facing each other in a straight line), and the circulating air that has passed through the primary filter 40 passes through the secondary filter 50 in a straight line through the communication port 22. Because the flow path of the communication port 22 is straight, the ventilation resistance of the dry air is extremely small, and loss is minimal. Furthermore, by configuring the primary filter 40 and the secondary filter 50 as two filters in the flow direction, the meshes can be overlapped in a planar manner, and the mesh (openings) of each filter (40, 50) can be made coarser than in a single filter configuration. This allows lint to be collected across the two filters, the primary filter 40 and the secondary filter 50. This prevents lint from being densely collected on each of the primary filter 40 and the secondary filter 50. Therefore, using the primary filter 40 and the secondary filter 50 allows for stable air circulation to be maintained.

[0035] 4, the secondary filter 50 has a mesh member 50b (only part of which is shown in FIG. 4) made of metal or the like, which is integrally formed by insert molding into a synthetic resin frame 50a, similar to the primary filter 40. The secondary filter 50 has a finer mesh than the primary filter 40.

[0036] <How to clean the primary filter 40> In the method of cleaning the primary filter 40 shown in Figure 2, the rotating drum 29 is rotated with water (wash water, rinse water, and water newly supplied after the rinse has finished) stored at the bottom of the outer tub 20. As a result, the lifter 33 of the rotating drum 29 scoops up the submerged water and sprays it onto the primary filter 40 (see Figure 2) at the top of the back side of the outer tub 20. By repeating this operation, the primary filter 40 is cleaned and lint adhering to the primary filter 40 is washed away. The water used to clean the primary filter 40 may also be the water used to clean the secondary filter 50. In this case, it is possible to conserve water.

[0037] <Configuration of the vicinity of the overflow port 20b3 of the tank cover 20b> As described above, the outer tub 20 shown in FIGS. 2 and 3 has a short cylindrical outer tub body 20a with a bottom and a short cylindrical tub cover 20b. The outer tank body 20a and tank cover 20b are each injection molded using glass fiber-reinforced PP (polypropylene: structural formula (C3H6)n), which has high rigidity and high heat resistance. However, other materials may be used for the outer tank body 20a and tank cover 20b as long as they meet the specified requirements for the outer tank 20, such as high rigidity and high heat resistance.

[0038] Fig. 6A is a perspective view of the outer tub 20 with the tub cover 20b and outer tub body 20a removed, viewed from the right rear. Fig. 6B is an enlarged view of part I in Fig. 6A. The outer tank 20 shown in Figure 2 is formed by matching the outer shape of the short cylindrical tank cover 20b with the outer tank body 20a, which is a short cylindrical tank with a bottom (see Figure 3), and fixing the tank cover 20b by inserting a bolt (not shown) into the screw hole 20b12 of the fixing flange 20b11 of the tank cover 20b shown in Figure 6A and tightening the bolt to the female thread (not shown) of the outer tank body 20a.

[0039] <Overflow mouth 20b3> An overflow port 20b3, which is a vertical through-hole, is provided in the side peripheral plate 20b2 of the short cylindrical tank cover 20b shown in FIG. 6A, slightly below the vertical center. The overflow port 20b3 is formed by punching a mold downward as, for example, a circular hole with a diameter of 32 mm in the vertical direction of the outer tub 20. Note that the overflow port 20b3 may be a through-hole with a diameter other than a circular hole with a diameter of 32 mm.

[0040] As described above, the primary filter 40 shown in FIG. 2 is cleaned by rotating the rotary drum 29 while water (washing water, rinsing water, water newly supplied after rinsing, etc.) has accumulated at the bottom of the outer tub 20, and the lifter 33 of the rotary drum 29 scoops up the submerged water and sprays it onto the primary filter 40 on the inner back side of the outer tub 20. At this time, there is a risk that the wash water dropping downward from the vicinity of the upper primary filter 40 may leak out from the overflow port 20b3.

[0041] <Overflow port 20b3 and the leak-proof rib 20b4 above it> Therefore, in the first embodiment, as shown in Figures 6A and 6B, a long, plate-shaped water-leakage-resistant rib 20b4 is provided on the side peripheral plate 20b2 of the tub cover 20b immediately above the overflow outlet 20b3. In other words, the plate-shaped water-leakage-resistant rib 20b4 is provided above the overflow outlet 20b3 provided in the outer tub 20 of the washing tub. By providing the leak-proof rib 20b4 above the overflow port 20b3, flush water pouring down from above the overflow port 20b3 comes into contact with the leak-proof rib 20b4 above the overflow port 20b3, preventing the flush water from leaking out of the overflow port 20b3. In other words, flush water used to wash the primary filter 40 is less likely to enter the overflow port 20b3. This prevents a decrease in flush water, further improving the cleaning performance of the primary filter 40.

[0042] In other words, the water-leakage-resistant rib 20b4 is provided near the upper end of the overflow port 20b3 or near the upper edge of the overflow port 20b3. The water-leakage-resistant rib 20b4 is provided parallel to the direction of the rotation axis O so as to form a wall that covers the overflow port 20b3 in the rotation direction of the rotating drum 29 (arrow α11 in Figures 6A and 6B). In other words, the water-leakage-resistant rib 20b4 is provided upstream of the overflow port 20b3 in the rotation direction (arrow α11 in FIGS. 6A and 6B) of the rotating drum 29. Alternatively, the water-leakage-resistant rib 20b4 is provided upstream of the flow of flush water toward the overflow port 20b3.

[0043] In other words, the leak-proof rib 20b4 is present in the entire area vertically above the overflow port 20b3. This causes flush water pouring down from above the overflow port 20b3 to come into contact with the leak-proof rib 20b4 above the overflow port 20b3, reducing the amount of flush water flowing into the overflow port 20b3. It also makes it easier to adjust the amount of flush water flowing into the overflow port 20b3.

[0044] <Height dimension s1 of the leak-proof rib 20b4> The height s1 of the leakproof rib 20b4 shown in FIG. 6B from the side peripheral plate 20b2 is, for example, about 3 mm (2.5 mm to 3.5 mm). The height dimension s1 (see FIG. 6B) of the water-leakage-resistant rib 20b4 is determined by the following condition: The maximum height dimension s1 (see FIG. 6B) is desirable so that the rotating drum 29 does not come into contact with the water-leakage-resistant rib 20b4 when the rotating drum 29 reaches the maximum swing amplitude when rotating at high speed at the natural frequency during the dehydration process, and so that water does not leak from the overflow port 20b3.

[0045] <Action and effect> As described above, the leak-proof rib 20b4 is provided above the overflow port 20b3, which has the advantageous effect of preventing flush water that has washed the primary filter 40 from coming into contact with the leak-proof rib 20b4 and leaking from the overflow port 20b3. Therefore, the wash water for the filter (primary filter 40) that collects lint does not leak from the overflow port 20b3 and decrease, and the primary filter 40 can be washed with a sufficient amount of wash water.

[0046] Therefore, it is possible to realize the washer-dryer 100 (see FIG. 1) in which the cleaning performance of the primary filter 40 is further improved. <<Second embodiment>>

[0047] FIG. 7 is a schematic cross-sectional view of the front part of the internal structure of a washer / dryer 100A according to the second embodiment, viewed from the left side. The washer / dryer 100A according to the second embodiment includes a water seal trap 11 that seals in bad odors in the drainage pipe line with stored liquid. The water seal trap 11 of the second embodiment is supplied with water from an overflow port 21b3 corresponding to the overflow port 21b2 of the first embodiment, thereby replacing the seal water stored in the water seal trap 11 and cleaning the periphery of the water seal trap 11.

[0048] Other configurations of the second embodiment are similar to those of the first embodiment, so similar components are denoted by the same reference numerals and detailed description thereof will be omitted. The washer-dryer 100A of the second embodiment shown in FIG. 7 includes a drainage channel 7 for draining water stored in the outer tub 20, and an overflow path (overflow path) 10, which is a path for overflow drainage (overflow) when the water stored in the outer tub 20 exceeds a predetermined water level.

[0049] The drainage channel 7 is a path for draining the washing liquid stored in the outer tub 20. The drainage channel 7 has an internal drainage channel 7a, a water channel filter 7b, a drainage valve 7c, and a drainage hose 7d. The internal drainage channel 7a communicates with the drainage hole 3a of the outer tub 20. The water channel filter 7b collects lint contained in the drainage liquid flowing through the internal drainage channel 7a.

[0050] <Overflow path 10 and overflow port 20b3 with water seal trap 11> The overflow path 10 shown in FIG. 7 is a path for overflow drainage (overflow) when the washing liquid stored in the outer tub 20 exceeds a predetermined water level. The overflow path 10 is a pipe that allows water to flow through and store water therein. The water seal trap 11 of the overflow path 10 has a first bent portion 11a and a second bent portion 11b. The presence of the water seal trap 11 allows water to be stored between the inlet 10i and outlet 10o of the overflow path 10, thereby preventing the flow of air through the overflow path 10. Furthermore, the water seal trap 11 is provided with water supplied from the overflow port 20b3 as the rotary drum 29 rotates, replacing the seal water and cleaning the surrounding area.

[0051] The overflow path 10, which has an overflow outlet 21b3 at its tip, has an overflow inlet flow path 21a (see FIG. 7) and the water seal trap 11. The water seal trap 11 is provided in communication with the overflow port 21b3 (see FIG. 7) of the outer tub 20. When the level of the washing liquid in the outer tub 20 reaches a predetermined level or higher, the washing liquid overflows and flows so that the overflow port 21b3 formed at the tip of the overflow path 10 communicates with the water seal trap 11. In this way, the overflowed washing liquid reaches the water seal trap 11.

[0052] The overflow path 10 communicates downstream of the drain valve 7c and is connected to a drain hose 7d, so that the water seal trap 11 of the overflow path 10 communicates downstream of the drain valve 7c.

[0053] <Position of the overflow port 21b3 and the water seal trap 11> 7, in the washer / dryer 100A of the second embodiment, the overflow port 21b3 and the water seal trap 11 are arranged in a position along the rotation direction of the rotating drum 29 (on the circumference of the rotating drum 29) so that overflow water is not blocked by the valve. Moreover, the overflow port 21b3 and the water seal trap 11 are arranged on the side of the rotating drum 29 and below the center of the rotating drum 29 in the up-down direction.

[0054] It is desirable that the overflow port 21b3 and the water seal trap 11 be disposed on the same side of the rotary drum 29, but they may be disposed on different sides of the rotary drum 29. <Leak-proof rib 21b4>

[0055] FIG. 8 is a view of the vicinity of the overflow port 21b3 as viewed from the center side of the rotary drum 29. A water-leakage-resistant rib 21b4 is formed on a part of the area vertically above the overflow port 21b3, while the water-leakage-resistant rib 21b4 is not formed on the other part of the area vertically above the overflow port 21b3. Specifically, if the horizontal dimension of the overflow outlet 21b3 is s2 and the horizontal dimension from the rear edge 21b30 of the overflow outlet 21b3 to the rear edge 21b40 of the leakage-resistant rib 21b4 is s3, the leakage-resistant rib 21b4 is not formed vertically above the horizontal dimension s3 (directly above the overflow outlet 21b3 of the horizontal dimension s3).

[0056] For example, s2=32 mm (the diameter of the round vertical overflow port 21b3 is 32 mm), and s3=6.2 mm. The dimensions of s2 and s3 can be set arbitrarily. In other words, as shown in FIG. 8, the horizontal length s4 of the leakage-resistant rib 21b4 above the overflow port 21b3 is shorter than the horizontal dimension s2 of the overflow port 21b3. With the above-described configuration, by not providing the leakage-resistant rib 21b4 in a portion vertically above the leakage-resistant rib 21b4 (linearly above the overflow port 21b3), flush water can be partially supplied to the overflow port 21b3.

[0057] <Modification 1 of the Second Embodiment> FIG. 9A is a view of the vicinity of the water-leakage-resistant rib 22b4 and the overflow port 21b3 of the first modified example of the second embodiment, viewed from above.

[0058] 9A shows a first modified example of the second embodiment in which a notch 22b41 is provided in a water-leakage-resistant rib 22b4 provided to cover the upper part of the overflow port 21b3. The shape of the notch 22b41 may be other shapes and can be selected arbitrarily. According to the configuration of Modification 1, like the second embodiment, some flush water (a portion of the flush water) can be supplied to the overflow port 21b3.

[0059] <Modification 2 of the Second Embodiment> FIG. 9B is a view of the vicinity of the water-leakage-resistant rib 23b4 and the overflow port 21b3 of the second modification of the second embodiment, viewed from above. The water-leakage-resistant rib 23b4 of the second modification is provided in a portion above the overflow port 21b3, and is not provided from the rear edge 23b40 of the water-leakage-resistant rib 23b4 to the rear edge 21b30 of the overflow port 21b3. Furthermore, a notch 23b41 is formed in the water-leakage-resistant rib 23b4. According to the configuration of the second modification, like the second embodiment, some flush water (a portion of the flush water) can be supplied to the overflow port 21b3.

[0060] <Action and effect> In the case of a washer-dryer having a structure in which the water seal trap 11 is provided downstream of the overflow outlet 21b3, the water in the water seal trap 11 becomes cloudy and unclean with prolonged use, and bacteria grow and putrefy. Furthermore, when foreign matter such as lint flows into the water seal trap 11, it may cause the water seal trap 11 to become clogged.

[0061] According to the second embodiment, the length of the leak-proof rib 21b4 is shortened. Alternatively, a notch 22b41 (see FIG. 9A) (Modification 1) or a notch 23b41 (see FIG. 9B) (Modification 2) is provided. This makes it possible to supply the minimum amount of flush water necessary to the water seal trap 11. This has the advantageous effect of replacing the water seal water in the water seal trap 11 while discharging foreign matter from the water seal trap 11 and cleaning the inside of the water seal trap 11.

[0062] <Other embodiments> 1. In the above embodiment, the cutout 22b41 of variant example 1 (see Figure 9A) and the cutout 23b41 of variant example 2 (see Figure 9B) are illustrated as having a linear outer shape, but the outer shape may also be curved or may have both curved and linear shapes.

[0063] 2. The present invention is not limited to the above-described first and second embodiments and first and second modifications, but includes various specific forms and modifications within the scope of the claims. [Explanation of symbols]

[0064] 11 Water seal trap 20 Outer tank 20b Tank cover (side periphery of outer tank) 20b3, 21b3 Overflow mouth 20b4, 21b4, 22b4, 23b4 Leak-proof rib (rib) 21 In-tank duct 22b41, 23b41 notch 29 Rotating drum (drum) 30 Laundry (clothing) 40 Primary filter (filter) 100, 100A washer-dryer O Rotation axis s2 Horizontal dimension of overflow outlet s4 Horizontal length of leak-proof rib (horizontal length of rib) α11 Rotation Direction

Claims

1. An outer tub that stores the washing liquid, an overflow port provided on a side peripheral plate of the outer tank; a drum for washing or drying laundry; an in-tank duct provided on the inner rear surface of the outer tank; a filter attached to the in-tank duct for collecting lint, A rib is provided above the overflow port. A washer-dryer characterized by the above.

2. The washing and drying machine according to claim 1, The rib is provided above the overflow port near its upper end. A washer-dryer characterized by the above.

3. The washing and drying machine according to claim 1, The rib is The wall is provided approximately parallel to the rotation axis direction of the drum so as to cover the overflow port in the rotation direction of the drum. A washer-dryer characterized by the above.

4. The washing and drying machine according to claim 1, The rib is provided on the upstream side of the overflow port in the rotation direction of the drum. A washer-dryer characterized by the above.

5. The washing and drying machine according to claim 1, The rib is provided on the upstream side of the flow of wash water toward the overflow port. A washer-dryer characterized by the above.

6. The washing and drying machine according to claim 1, The rib is present in the entire area vertically above the overflow port. A washer-dryer characterized by the above.

7. The washing / drying machine according to any one of claims 1 to 5, In the case of a structure having a water seal trap downstream of the overflow outlet, the horizontal length of the rib above the overflow outlet is shorter than the horizontal dimension of the overflow outlet. A washer-dryer characterized by the above.

8. The washing / drying machine according to any one of claims 1 to 5, In the case of a structure having a water seal trap downstream of the overflow port, the rib has a notch. A washer-dryer characterized by the above.

9. The washing / drying machine according to any one of claims 1 to 5, In the case of a structure having a water seal trap downstream of the overflow outlet, the rib does not exist in a part vertically above the overflow outlet. A washer-dryer characterized by the above.

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