JP4843422B2 - Drum type washer / dryer - Google Patents

Description

The present invention relates to a drum-type washing and drying machine in which a drum tub for storing laundry is disposed obliquely.

Since drum-type washing machines (see, for example, Patent Document 1) are easy to put in and take out the laundry and can be washed with less water by the tapping method, the number of units sold has increased in recent years. In such a drum type washing machine, in order to increase washing efficiency and rinsing efficiency, a technique for circulating washing water and rinsing water using a circulation pump has been developed. Incidentally, the washing water is water used at the time of washing (washing water), and the rinsing water is water used at the time of rinsing.
JP 2003-79995 A (FIG. 1)

  However, at the time of washing and rinsing, lint, cloth waste and the like are generated from the laundry, and this lint and the like are circulated together with washing water and rinsing water by an operating circulation pump. Since the lint and the like circulate in this way, there is a possibility that lint and the like are clogged in the circulation pump and the circulation pump stops.

Then, this invention makes it a subject to provide the drum type washing- drying machine with which a lint etc. are hard to be clogged in a circulation pump.

As means for solving the above-mentioned problems, the present invention provides a housing, an outer tub disposed in the housing and for storing washing water or rinsing water, and rotatable in the outer tub coaxially with the outer tub. A drum tub disposed in a lower part of the outer tub, and a circulation pump for circulating washing water or rinsing water, wherein the rotation axis of the drum tub is oblique. A dryer for washing water or rinsing water from the outer tub to the circulation pump is disposed at a lower portion of the outer tub and is injected into the drum tub by the operation of the circulation pump. A washing water or rinsing water injection port is disposed below the center of the inlet of the drum tank, and a base on which the circulation pump is attached is integrated with the outer tank and the synthetic resin at the lower part of the outer tank. characterized in that it has been formed to It is a ram type washing and drying machine.

According to such a drum type washing / drying machine, the suction port is arranged at the lower part of the outer tub, and the injection port is arranged below the center of the inlet of the drum tub. The head height of water (the difference between the spray port and the water level of the washing water or the rinsing water accumulated in the outer tub) can be reduced. Thus, in order to prevent clogging of lint and the like in the circulation pump, for example, even if the gap between the circulation pump impeller and the pump casing is widened to reduce the flow rate (L / min), the head height is reduced. Since it is small, it can circulate suitably and can be injected. That is, according to such a drum type washing machine, it is possible to circulate washing water or rinsing water while preventing clogging of lint and the like.

ADVANTAGE OF THE INVENTION According to this invention, the drum type washing- drying machine with which a lint etc. cannot be easily clogged in a circulation pump can be provided.

Hereinafter, a drum type washing machine (drum type washing and drying machine) according to an embodiment of the present invention will be described with reference to the drawings as appropriate.

≪Drum-type washing machine-mechanical configuration≫
First, the mechanical configuration of the drum type washing machine 1 according to the present embodiment will be described.
As shown in FIG. 1, the drum type washing machine 1 according to the present embodiment mainly includes a housing 10, an outer tub 20, a drum tub 30, and a circulation pump 40. The rotation axis is arranged obliquely. Here, in order to explain clearly, as shown in FIG.

<Case>
The casing 10 is an outer frame casing of the drum type washing machine 1 and is disposed on a casing base 11 having rubber legs 11a. In addition, an electromagnetic water supply valve 12 and a detergent case 13 into which a detergent necessary for washing is placed are arranged on the upper side of the housing 10. When the water supply valve 12 is opened, tap water flows from the tap (not shown) into the detergent case 13 via the water supply hose 14, the water supply valve 12, and the water injection hose 15, and the detergent is melted. It flows into the outer tub 20 through the hose 16. The detergent case 13 is also provided with a softener charging case (not shown) into which a softening agent for improving the finish of the laundry is charged during rinsing.

  In addition, a laundry input port 10 a is formed on the front side of the housing 10. The insertion port 10 a is appropriately opened and closed by an outer lid 17 that is rotatably attached to the housing 10. And if the outer lid | cover 17 is opened, the opening of the outer tank 20 and the opening of the drum tank 30 will face the exterior.

<Outer tank>
The outer tub 20 is a bottomed cylindrical body for storing washing water or rinsing water, and is disposed in the housing 10 in a state of being supported from below by a suspension 21. Moreover, the axis A of the outer tub 20 is slanted, the rear side is in a lowered state, and the front side is open.
Incidentally, the degree of the inclination of the axis A of the outer tub 20 and the drum tub 30 coaxial with the outer tub 20 is that the angle θ formed between the axis A and the horizontal plane is 5 to 30 ° in consideration of taking out the laundry. Is preferred, and 15 ° is optimal.

  As shown in FIG. 2, a cylindrical attachment base 20 a to which the circulation pump 40 is attached is formed in the rear lower portion (lowermost portion) of the outer tub 20. Incidentally, the outer tub 20 is made of synthetic resin, and is integrally formed including the mounting base 20a. Thereby, compared with the case where the mounting base 20a is comprised by another component, the number of parts decreases and the manufacturing cost of the drum type washing machine 1 is suppressed. Further, since the mounting base 20a is not configured as a separate part, the amount of protrusion of the circulation pump 40 from the outer tub 20 can be reduced. The space is secured and the drum-type washing machine 1 is downsized.

Moreover, it is a rear lower part (lowermost part) of the outer tub 20, and in the center of the mounting base 20 a, a cylindrical shape that serves as a water discharge port for the outer tub 20 and serves as a suction port for the circulation pump 40. The suction part 20b is formed. Incidentally, the suction part 20b is also integrally formed with the outer tub 20 like the mounting base 20a.
When washing water and rinsing water are circulated at the time of washing and rinsing, the washing water and rinsing water are sucked into the circulation pump 40 through the suction portion 20b. In other words, when washing is performed, washing water having a high concentration of detergent that tends to sink (called high-concentration washing water) is sucked and then sprayed onto the laundry, so that the laundry is efficiently washed and rinsed. Sometimes it can be rinsed efficiently.
On the other hand, at the time of drainage, the water in the outer tub 20 is quickly discharged without remaining through the suction part 20b and the circulation pump 40.

Returning to FIG. 1, the description will be continued.
The suspension 21 is a damping device that includes, for example, a cylinder and a compression coil spring. Incidentally, a plurality (for example, three) of the suspensions 21 are arranged in the circumferential direction of the outer tub 20. The suspension 21 supports the approximate center of gravity of the outer tub 20. Furthermore, in order to ensure the stroke amount, the suspension 21 is disposed at the approximate center of the outer tub 20 in the front-rear direction.

  On the other hand, the upper part of the outer tub 20 is connected to the housing 10 via a tension spring 22 and a tension spring 23 (tensile coil spring). Accordingly, the outer tank 20 is prevented from falling, and the vertical and horizontal vibrations of the outer tank 20 during dehydration are reduced while the posture of the outer tank 20 is maintained.

  Further, a bellows-like rubber bellows 24 is provided between the edge of the front opening of the outer tub 20 and the housing 10, so that watertightness between the opening and the housing 10 is ensured. ing. Thus, the washing water and the rinsing water do not enter the inside of the housing 10. Further, the outer lid 17 in the closed position is in close contact with the bellows 24. This prevents the washing water and the rinsing water from leaking to the outside.

<Drum tank>
The drum tub 30 is a bottomed cylindrical body made of stainless steel, for example, and is a tub for storing laundry. The drum tub 30 is coaxial with the axis A of the outer tub 20 and is rotatably disposed in the outer tub 20. The diagonal upper side is open. More specifically, a motor 31 (for example, a DC-DC brushless motor) is attached to the outside of the bottom 20c of the outer tub 20 via a bracket or the like, and an output shaft 31a of the motor 31 is connected to the outer tub 20. It extends into the outer tub 20 through the output shaft hole of the bottom 20c. The output shaft 31a is arranged on the axis A.
And the bottom wall 30a of the drum tank 30 is being fixed to the output shaft 31a via the flange 32 and the disk-shaped reinforcement board (not shown) which reinforces the bottom wall 30a. That is, the drum tank 30 is supported by the motor 31 in a cantilever manner.

  A plurality of dewatering holes 30 b are formed in the peripheral wall of the drum tank 30. Thus, when the drum tub 30 is rotated by the motor 31 at the time of dehydration, the moisture of the laundry is dehydrated to the outer tub 20 through the dewatering holes 30b by centrifugal force.

Furthermore, a plurality of lifters 33 are provided on the inner peripheral surface of the drum tank 30 at equal intervals in the circumferential direction (for example, in the case of three, 120 ° intervals). Thereby, the laundry on the back side (bottom side) can also be efficiently scraped.
The radially inner end 33a of the lifter 33 may be parallel to the axis A. For example, when the lifter 33 is at the lowest position, the end 33a may be horizontal. In this way, the laundry on the back side (bottom wall 30a side) can be more suitably scraped.

  Furthermore, a ring-shaped balancer 34 is provided at the edge of the front opening of the drum tank 30. The balancer 34 maintains the balance of the drum tank 30 that rotates during dehydration and reduces vibration. Such a balancer 34 has a ring-shaped space inside, and a fluid having a high specific gravity such as an aqueous potassium chloride solution is accommodated in this space.

<Circulation pump>
The circulation pump 40 is a pump that circulates the washing water by pumping the washing water at the time of washing and the rinsing water at the time of rinsing, and is attached to the lowermost part on the rear side of the outer tub 20 as shown in FIG. Such a circulation pump 40 is rotatably arranged in the casing 41, and an impeller 50 that sucks washing water or rinsing water from its upper surface side and discharges it radially outward by centrifugal force. A motor 61 (driving means) that is attached to a lower plate 43 described later of the casing 41 and that rotationally drives the impeller 50 is mainly provided.

  The casing 41 mainly includes a substantially cylindrical casing body 42 that forms a volute (vortex), and a lower plate 43 that closes a lower opening of the casing body 42. The casing main body 42 is attached to the mounting base 20 a of the outer tub 20 with bolts 44. A ring-shaped packing 45 is interposed between the casing main body 42 and the mounting base 20a to maintain water tightness.

  The casing body 42 has an outlet 42a (discharge port) for washing water or rinse water pumped by the rotation of the impeller 50 during washing and rinsing, and water drained from the outer tub 20 (including during dehydration). A water outlet 42b.

  As shown in FIG. 1, one end of a circulation hose 46 is connected to the outlet 42a. The circulation hose 46 is disposed along the outer tub 20, and the other end is disposed in the vicinity of the lower side of the edge surrounding the opening of the outer tub 20 and constitutes an injection port 46 a. That is, the injection port 46 a is arranged on the vertically lower side than the center of the opening (inlet) of the drum tank 30. As a result, the head height ΔH, which is the difference between the ejection port 46a and the water level of the wash water or the rinse water stored in the outer tub 20, is small. Therefore, even if the flow rate (L / min, for example, 10-15 L / min) of the wash water or the rinse water pumped by the operation of the circulation pump 40 is small, the circulation is possible.

Further, the washing water or the rinsing water ejected from the ejection port 46 a is configured to be directed to the inner peripheral surface of the lower half of the drum tank 30 when viewed from the axis A. As a result, washing water or the like is sprayed from the injection port 46a onto the laundry that is lifted up by the lifter 33 during washing, and the laundry with increased weight is easily separated and falling. By spraying on the laundry, the washing and rinsing effect is promoted.
However, the injection port 46a is not limited to being configured by the other end of the circulation hose 46 as described above. For example, an injection nozzle may be attached to the other end of the circulation hose 46 to configure the injection port. Furthermore, a lint filter may be provided in the middle of the circulation hose 46 to collect lint and the like.

  On the other hand, the outlet 42 b is connected to a drain valve 48 via a joint pipe 47. When the drain valve 48 is opened during drainage when the impeller 50 is stopped, the water in the outer tub 20 is passed through the joint pipe 47, drain valve 48, drain hose 49, and the drum type washing machine 1. It is designed to be discharged to the outside.

  That is, the circulation pump 40 is located at the lowermost part of the outer tub 20 and below the suction part 20b, and at the branch point between the circulation line and the drain line. At the time of washing and rinsing, the circulation pump 40 is operated while the drain valve 48 is closed, and the washing water or the rinsing water is circulated. On the other hand, when draining, the drain valve 48 is opened while the circulation pump 40 is stopped, and the water in the outer tub 20 is drained through the circulation pump 40. Incidentally, at the time of drainage, water in the circulation pump 40 and the circulation hose 46 disposed obliquely is also drained to prevent freezing.

As shown in FIG. 3, the impeller 50 is a slightly thick disk having an outer shape, and has four blade channels 51 that are cut out and recessed from the upper side (see FIG. 4). . The four blade flow paths 51 are flow paths for the wash water or the rinse water to be pumped. A surface surrounding the blade flow path 51 in the impeller 50 is a concave curved surface 52. Incidentally, each blade channel 51 in plan view has a substantially sector shape, and the four blade channels 51 are arranged at equal intervals in the circumferential direction of the impeller 50. However, the number of the blade flow paths 51 is not limited to this, and may be three, five, or the like.
Thereby, the lint associated with the washing water and the rinsing water is not easily caught in the blade flow path 51, and clogging is prevented. In addition to this, the outer surface of the impeller 50 is preferably a curved surface by chamfering or the like and is preferably smooth in order to further prevent catching of lint and the like.

  Further, the radially inner edge 53 of the concave curved surface 52 that forms the blade channel 51 is disposed on the inner side of the inner peripheral surface of the cylindrical suction portion 20b that serves as a suction port for washing water or rinse water ( (See FIG. 4). Accordingly, the washing water or the rinsing water is efficiently sucked into the blade channel 51 from the suction portion.

  Further, an appropriate gap (gap, clearance) is provided between the impeller 50 and the casing main body 42 (casing 41) so as not to clog lint and the like. Here, when the gap is provided in this way, the flow rate (pressure) of the water pumped by the circulation pump 40 is reduced and the pumping height is reduced. Since 46a is in a low position and the head height ΔH is suppressed, it is possible to circulate washing water and the like appropriately. In other words, in order to prevent clogging in the circulation pump 40, the gap between the impeller 50 and the casing 41 is increased, and as a result, the QH (flow rate-pumping height) characteristic of the circulation pump 40 that has decreased is compensated for. The height of the injection port 46a with respect to the water surface of the wash water etc. stored in the tank 20 was made low.

  Furthermore, the impeller 50 is formed from a flexible material such as urethane rubber. As a result, lint and the like are hardly clogged between the impeller 50 and the casing 41, and the lock due to clogging of the circulation pump 40 is prevented.

Here, a method of attaching the circulation pump 40 to the outer tub 20 will be briefly described with reference to FIG.
The motor 61 is attached to the lower plate 43 by an appropriate method. Next, the impeller 50 is fixed to the output shaft 61 a of the motor 61 protruding from the lower plate 43. Thereafter, the lower plate 43 is fixed to the casing main body 42, and the casing main body 42 is fixed to the mounting base 20a. As described above, the casing body 42 is fixed to the mounting base 20a, and at the same time, the inside of the casing body 42 is closed from the outside.

≪Circuit configuration of drum type washing machine≫
Next, the control means 100 for controlling the operation of the drum type washing machine 1 will be described with reference to FIG.
As shown in FIG. 5, the control means 100 of the drum type washing machine 1 includes a microcomputer 101 as a main part. The microcomputer 101 includes a CPU 102 (central processing unit) having a calculation unit 102a and a control unit 102b, a timer 103 that is a clock pulse generation unit, a memory 104, an input port 105, an output port 106, and the like.

  The CPU 102 is basically a device that fetches, decodes and executes a control command from the memory 104. Specifically, the CPU 102 controls by arithmetic operation or memory designation, and designates an input / output address content to a reading device. I / O and control of the program of fully automatic course and annual setting.

  The memory 104 includes a RAM 104a and a ROM 104b. The RAM 104a has a function of storing a control program and data of the drum type washing machine 1 read from the ROM 104b by the CPU 102 and a function of a work area of the CPU 102. The ROM 104b has only a read function, stores a predetermined program and fixed data, and is used when the same processing is performed at any time.

The input port 105 is a circuit that mediates data from the input circuit unit 110 outside the microcomputer 101 to be transferred to the CPU 102.
The output port 106 is a circuit that mediates data from the CPU 102 in order to pass it to the output drive circuit unit 120 outside the microcomputer 101.

Incidentally, the input circuit unit 110 includes a power switch 111, a water level sensor 112, an IC hall element 113, a lid opening / closing sensor 114, a fully automatic selection key 115, a manual setting key 116, and a cloth amount sensor 117. It is connected.
On the other hand, a motor 31 for the drum tank 30, a motor 61 for the circulation pump 40, a water supply valve 12, a drain valve 48, a lid lock solenoid 121, and an end buzzer 122 are connected to the output drive circuit unit 120. Has been.

The power switch 111 is a start switch of the drum type washing machine 1. When the CPU 102 detects an ON signal of the power switch 111, power is supplied from a household power source or the like, and the drum type washing machine 1 (such as the microcomputer 101) is started.
The water level sensor 112 is a sensor that detects the water level in the drum tank 30 and is provided at an appropriate position. Then, the CPU 102 determines whether the amount of water is appropriate based on the detected water level, and opens / closes the water supply valve 12 or the like.
The IC Hall element 113 is an element that detects the rotational speed of the drum tank 30 by detecting magnets arranged at predetermined intervals in the circumferential direction of the drum tank 30. Then, the CPU 102 performs appropriate rotation control of the motor 61 via the output port 106 and the output drive circuit unit 120 based on the detected rotation speed of the drum tank 30.
The lid opening / closing sensor 114 is a sensor that detects opening / closing of the outer lid 17 and is provided at an appropriate position.
The fully automatic selection key 115 is a key that is pressed when the user selects a fully automatic course.
The manual setting key 116 is a key that is pressed when the user customizes the washing course as appropriate.
The cloth amount sensor 117 is a sensor that detects the amount of laundry in the drum tub 30.

The lid lock solenoid 121 constitutes a lock mechanism that locks the outer lid 17 in the closed position. When the drum tank 30 rotates at a high speed, the lid lock solenoid 121 is energized to activate the lock mechanism and prevent the outer lid 17 from being opened.
The end buzzer 122 is a buzzer notifying that the washing is finished.

≪Operation of drum type washing machine≫
Next, the operation of the drum type washing machine 1 will be described with reference to FIG. Here, a case where the fully automatic selection key 115 is pressed and washing, rinsing, and dewatering of the laundry are automatically performed is shown.
First, the water supply valve 12 is opened and water is supplied to the outer tub 20 (S201). The amount of water supply is related to the size of the outer tub 20, the degree of inclination of the axis A, and the like, for example, is about 20L.

When the water supply is completed in this way, the process proceeds to washing (S202), and the drum tank 30 is rotated by the motor 31. When the drum tank 30 is rotated, the laundry is lifted up by the lifter 33 and then dropped, and as a result, the laundry is beaten.
Incidentally, the rotational speed of the drum tank 30 at the time of washing and the next rinsing is set to 40 to 60 rpm, for example. This rotational speed depends on the outer diameter of the drum tank 30 and decreases as the outer diameter increases. Further, the drum tank 30 repeats forward rotation or reverse rotation for about one minute with a predetermined stop time (for example, 30 seconds) interposed therebetween.

  When the washing is finished, the drain valve 48 is opened after the circulation pump 40 is stopped. Then, the washing water containing dirt that has flowed out of the laundry is drained to the outside of the drum type washing machine 1 (S203). Thereafter, the drum tank 30 is rotated at a high speed by the motor 31, and the washing water contained in the laundry is dehydrated (S204).

  After completion of the dehydration, the drain valve 48 is closed, the water supply valve 12 is opened, water is supplied to the outer tub 20 (S205), and the detergent contained in the laundry is rinsed (S206). Incidentally, the water level in this case is set higher than that at the time of washing (S202).

  Thereafter, drainage (S207), dehydration (S208), and water supply (S209) are performed, and then a second rinse (S210) is performed. Incidentally, the water level in the second rinsing is set to a water level equivalent to that at the time of washing (S202) or a water level obtained by subtracting the amount increased at the first rinsing (S206).

  When the second rinsing is completed, after draining (S211), the process proceeds to final dehydration (S212) in which the drum tank 30 is rotated at high speed, and after dehydrating for a predetermined time, the process ends (S213).

≪Effect of drum type washing machine≫
According to such a drum type washing machine 1, the following effects can be mainly obtained.
A suction portion 20b that serves as a suction port for washing water or the like is disposed in the lower portion of the outer tub 20, and an injection port 46a for washing water or the like that is sprayed into the drum tub 30 by the operation of the circulation pump 40. Since it is arranged below the center of the inlet of the head, the head height ΔH becomes small. Accordingly, the gap between the impeller 50 and the casing 41 can be increased in order to prevent clogging of lint and the like in the circulation pump 40. Then, by increasing the gap, the wash water or the like can be circulated even if the flow rate of the wash water or the like pumped by the circulation pump 40 is reduced.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and may be modified as follows, for example, without departing from the spirit of the present invention.

  In the above-described embodiment, the drum type washing machine 1 having washing, rinsing, and dehydrating functions has been described. However, even a drum type washing and drying machine further provided with a drying function belongs to the technical scope of the present invention. Needless to say.

  Instead of the configuration around the suction portion 20b shown in FIG. 2, the configuration shown in FIG. 7 may be used. As shown in FIG. 7, the lower surface in the vertical direction of the outer tub 20 is formed in two steps, and the suction portion 20b is disposed on the lower surface 20d of the lower surface formed in steps. That is, the lower surface of the outer tub 20 is recessed around the suction portion 20b, and a recess 20e is formed.

According to such a configuration, water in the outer tub 20 can easily flow into the recess 20e, so that substantially all of the water in the outer tub 20 can be drained during drainage. Moreover, since the high concentration wash water has high specific gravity, it becomes easy to flow into the hollow 20e. By operating the circulation pump 40 in such a state, high-concentration washing water can be jetted onto the laundry, and as a result, the laundry can be efficiently washed.
In addition, the configuration shown in FIG. 8 may be used. As shown in FIG. 8, the rear inner peripheral surface 20g of the suction portion 20f is inclined so that washing water or rinsing water does not remain during drainage. That is, the periphery of the suction port constituted by the lower opening of the cylindrical suction portion 20f is inclined so that no washing water or the like remains at the time of drainage.

It is a longitudinal cross-sectional view of the drum type washing machine which concerns on this embodiment. It is an enlarged view of X part which is the principal part of the drum type washing machine shown in FIG. It is a perspective view of the circulation pump concerning this embodiment. It is the X1-X1 sectional view taken on the line of the circulation pump shown in FIG. It is a block circuit diagram which shows the electric constitution of the drum type washing machine which concerns on this embodiment. It is a figure which shows one operation example of the drum type washing machine which concerns on this embodiment. It is a longitudinal cross-sectional view of the principal part of the drum type washing machine which concerns on a modification. FIG. 6 is a longitudinal sectional view of a main part of a drum type washing machine according to a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing machine 10 Case 12 Water supply valve 20 Outer tub 20a Mounting base 20b Suction part (suction port)
21 Suspension 30 Drum tank 40 Circulation pump 41 Casing 46a Injection port 48 Drain valve 50 Impeller 51 Blade flow path 52 Concave surface A Axis line ΔH Head height

Claims (6)

A housing,
An outer tub disposed in the housing and storing wash water or rinse water;
In the outer tub, a drum tub provided coaxially with the outer tub so as to be rotatable, and for storing laundry,
A circulation pump that is disposed in the lower part of the outer tub and circulates wash water or rinse water;
A drum-type washing / drying machine in which the rotation axis of the drum tank is oblique,
A suction port for washing water or rinsing water from the outer tub to the circulation pump is disposed at a lower portion of the outer tub,
The injection port of the washing water or the rinsing water injected into the drum tank by the operation of the circulation pump is disposed below the center of the inlet of the drum tank ,
A drum-type washing and drying machine , wherein a pedestal to which the circulation pump is attached is formed integrally with the outer tub and a synthetic resin at a lower portion of the outer tub . The circulation pump includes an impeller rotated by driving means,
In the impeller, the surface surrounding the blade flow path that becomes the flow path of the washing water or the rinse water is a curved surface.
The drum type washing and drying machine according to claim 1. The drum type washing and drying machine according to claim 2, wherein the impeller is formed of a flexible material. The washing water or the rinsing water ejected from the ejection port is configured to be directed from the rotating shaft toward the inner peripheral surface of the lower half of the drum tub. A drum type washing and drying machine according to claim 1. The circulation pump is disposed below the suction port and connected to a drain valve that is opened during drainage.
The lower surface in the vertical direction of the outer tub together with formed by uneven, the suction port is one of claims 1, characterized in that arranged on the lower of the lower surface formed by the stepped claims 4 A drum type washing and drying machine according to claim 1. The circulation pump is disposed below the suction port and connected to a drain valve that is opened during drainage.
Near the suction port, in the outer tub during the drainage, according to any one of claims 5 that claim 1, characterized in that inclined so as washing or rinsing water is not left Drum-type washer- dryer .

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