JPH10216396A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently dry washing in a spinning tub by providing a partition member for closing a gap between the upper end parts of an outer tub and a spinning tub corresponding to blowing pressure when hot air is supplied from a hot air supply means to the gap between the upper end parts of the outer tub and the spinning tub. SOLUTION: A drying process is started, and hot air 22 generated by the operation of a hot air generator 19 is guided to a clearance space A between a spinning tub 6 and an outer tub 5 through a duct 23. At this time, by the blowing pressure of hot air 22 from the duct 23, the free end of a seal member 103 is pressed to the spinning tub 6 side, and as indicated by a solid line, brought into contact with the outer peripheral surface of the spinning tub 6 to block up a clearance space B between a waterproof plate 16 and the spinning tub 6, thereby guiding the hot air 22 all to a clearance space A. As a dewatering hole 101 in the upper part of the side wall part of the spinning tub 6 has a small diameter and large air resistance, the hot air 22 does not flow in from this hole, but flow into the spinning tub 6 through a dewatering hole 101 with a large diameter in the lower part of the spinning tub 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing / drying machine that dries laundry by supplying warm air into a washing / dehydrating tub in a drying step of a washing / drying operation.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a cross-sectional view showing a conventional washer / dryer disclosed in Japanese Patent Application Publication No. JP-A-2006-115139. In the figure, 1 is an outer box, 2 is a top cover disposed on the upper part of the outer box 1 and provided with an opening 3 for taking in and out laundry.
The opening 3 can be opened and closed by the lid 4. Reference numeral 5 denotes an outer tub for storing a washing liquid and a rinsing liquid in the outer box 1, which is swingably supported by the outer box 1 by a vibration isolator (not shown). Reference numeral 6 denotes a washing / dehydrating tub which is rotatably disposed in the outer tub 5 and has a plurality of dehydrating holes 6a formed in the peripheral wall surface. Reference numeral 7 denotes a rotating blade which is rotatably disposed on the bottom of the washing / dehydrating tub 6; A driving device disposed on the outer bottom of the tub 5 to provide a driving force for rotation of the rotary wing 7 and the washing and dewatering tub 6; a motor 9 for generating a driving force; a motor pulley 10 for transmitting the driving force at a reduced speed; A spindle pulley 12 connected by a belt 11 and a gear device 1
3 and a clutch device 14 for switching the driving force to the gear device 13. Reference numeral 15 denotes a ring-shaped balancer which is attached to the periphery of the upper end of the washing and dewatering tub 6 and reduces vibration of the washing and dewatering tub 6 during the dewatering process. Reference numeral 16 is provided so as to cover the upper part of the outer tub 5 from above the balancer 15. A ring-shaped waterproof plate for suppressing splashing of water due to rotation of the washing and dewatering tub 6; 17 is a hose connection port for supplying washing water and rinsing water to the outer tub 5 provided on the top cover 2; This is a drain valve provided on the drain pipe connected to the bottom.

A hot air generator 19 is provided in a space formed between the top cover 2 and the waterproof plate 16 in the outer box 1, and comprises a blower 20 and a heater 21. Generates an air flow, and this air flow is
And the hot air 22 is blown into the washing / dewatering tub 6. 23
Is a flexible duct having one end connected to the waterproof plate 16 and the other end to the hot air generator 19, and communicating the hot air generator 19 with the inside of the outer tank 5.

[0004] Reference numeral 24 denotes a hot air backflow blocking member having a triangular projection 25 formed in the center, and flexible thin plates 26 provided above and below the projection 25. In this configuration, water is passed through the space A between the washing and dewatering tub 6 and the outer tub 5 to smoothly interlock and shut off the air flow. 27 is an overflow pipe having an outlet 28 at one end and a valve plate 29 at the other end, and 30 is a dehumidifier communicating with the hot air generator 19, and an exhaust duct 31 communicating with the dehumidifier 30 at the valve plate 29.
And the outlet 28 of the overflow 27 is connected to the drain valve 18.
To make the exhaust valve 18 and the dehumidifier 30 communicate with each other.
Reference numeral 32 denotes an inner lid that closes the center opening of the ring-shaped waterproof plate 16.

Next, the operation of the washing / drying machine of the above configuration in the drying step after the washing / rinsing / dehydrating step is completed will be described. After performing the washing, rinsing, dehydrating and normal washing operation steps, the drying step is started. The hot air generator 19 is operated to generate hot air 22 and pass through the duct 23 to the clearance space A between the outer peripheral surface of the washing and dewatering tub 6 and the inner peripheral surface of the outer tub 5 and to the lower surface of the waterproof plate 16. The hot air in the clearance space A flows into the laundry dehydration tub 6 from the dehydration holes 6a, and flows directly into the laundry dehydration tub 6 from the clearance space B. Is done. The hot air 22 passes through a laundry (not shown) placed on the upper surface of the rotary wing 7 on the inner bottom surface of the washing and dewatering tub 6, evaporates moisture contained in the laundry, and generates high-humidity hot air 22 a. And flows to the drain valve 18 formed at the lower part of the outer tub 5.
The hot air 22a that has entered the space A between the outer tub 5 and the outer tub 5 is blocked from flowing upward by the hot air backflow blocking member 24, flows downward in the drain pipe to the drain valve 18, and overflows from the outlet 28. It is guided to the dehumidifier 30 via the pipe 27 and the exhaust duct 31. The hot air 22a having a high humidity is cooled and condensed by the dehumidifying device 30, and is again turned into the hot air 22 from the hot air generating device 19 and blown into the washing and dewatering tub 6. The above operation is performed for a predetermined time to perform a drying process for drying the laundry.

[0006]

In the above-mentioned conventional washing and drying machine, heat is exchanged with the laundry by providing a hot air backflow blocking member in the clearance A between the washing and dewatering tub and the outer tub. This prevents the flow of air from flowing back upward through the gap A between the washing and dewatering tub and the outer tub and mixing with the warm air newly supplied into the outer tub 5. Since there is a gap between the washing and dewatering tubs, backflow cannot be completely blocked. In addition, the hot air backflow blocking member is located on the inner peripheral surface of the outer tub, so that assembly and workability at the factory are possible. In addition, there is a problem that the hot air backflow blocking member is poor in serviceability when dust adheres or breaks in actual use. Further, there is a problem that the warm air backflow blocking member and the washing / dewatering tub are rubbed by the vibration of the washing / dewatering tub during the high-speed rotation in the dewatering process, and the hot air backflow blocking member is damaged. Also,
The clearance space B between the waterproof plate and the washing and dewatering tub is provided with a large clearance space B to prevent the washing and dewatering tub from being rubbed by the vibration of the washing and dewatering tub during the spin-drying process. There is a problem that the warm air sent into the inside of the washing and dewatering tub flows out of the washing and dewatering tub from the upper dewatering hole of the washing and dewatering tub, and the air flow returns to the hot air generating device without touching the laundry. The present invention has been made in order to solve such a problem, and has a configuration in which warm air efficiently contacts the laundry in the washing and dewatering tub, and the outer tub and the washing and dewatering tub are not in contact with each other during the dewatering process. It is an object of the present invention to obtain a washer / dryer with good assemblability / workability and serviceability at a factory.

[0007]

SUMMARY OF THE INVENTION In a washing and drying machine according to the present invention, an outer box, an outer tub supported in the outer box, a rotatably disposed inside the outer tub, and an upper surface being opened. A washing / dewatering tub having a dewatering hole formed in a peripheral wall surface; a rotating blade disposed at an inner bottom of the washing / dewatering tub; and hot air supply means for supplying warm air into the washing / dewatering tub during a drying process. In the washing and drying machine, the hot air from the hot air supply means is supplied directly from the upper surface opening of the washing and dewatering tub or from the upper part of the outer tub through the dewatering hole, and the upper ends of the outer tub and the washing and dewatering tub are provided. A partition member for closing a gap between the outer tub and the upper end of the washing and dewatering tub in response to a blowing pressure when hot air is supplied from the hot air supply means.

Further, the partition member is formed of a sheet-like member having flexibility.

Further, the partition member is formed of a ring-shaped flexible tube which expands by the blowing pressure when hot air is supplied from the hot air supply means and closes a gap between the outer tub and the upper end of the washing and dewatering tub. It is.

[0010] The dewatering holes formed in the peripheral wall surface of the washing and dewatering tub are formed such that the diameter of the dewatering holes located at the upper part of the peripheral wall surface is smaller than the hole diameter of those located at the lower part of the peripheral wall surface.

The washing and dewatering tub has a peripheral wall formed in a truncated cone shape having a large diameter at a lower portion, and a dehydration hole formed only in a lower half portion thereof.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a cross-sectional view showing a washing and drying machine according to Embodiment 1 of the present invention.
Reference numeral 101 denotes a dewatering hole formed in the peripheral wall surface of the washing and dewatering tub 6 so that the hole diameter gradually increases from about 2 mm to 5 mm from the top downward, and 102 denotes a hole diameter on the bottom of the washing and dewatering tub 6. A plurality of ventilation holes 103 having a diameter of approximately 70 mm are located above the outer peripheral end of the balancer 15 and the upper end is fixed to the lower surface of the waterproof plate 16 and closer to the washing / dewatering tub 6 side of the duct 23 and the lower end is the outer peripheral surface of the balancer 15. A flexible ring-shaped seal member extending to a position facing
Reference numeral 4 denotes a vent hole having a diameter of approximately 5 mm provided in the rotor 7, A denotes a clearance space between the peripheral wall surface of the washing and dewatering tub 6 and the outer tub 5, and B denotes a space between the lower surface of the waterproof plate 16 and the upper end surface of the washing and dewatering tub 6. Interstitial space between 1
Reference numeral 05 denotes an exhaust hole provided on the upper side surface of the outer box 1. In addition,
The hot air generator 19 has a suction side opened on the side surface of the outer box 1 so as to take in room air.

[0013] Next, the washing and drying of
The operation of the drying process after the rinsing / dehydrating process is described. First, the lower end of the ring-shaped seal member 103, that is, the free end, is in a non-contact state with the outer peripheral surface of the washing and dewatering tub 6 as indicated by a broken line. The drying process is started, and the hot air generator 19 is operated to generate hot air 22. The hot air 22 passes through the duct 23 and the clearance space A between the washing dewatering tub 6 and the outer tub 5.
It is led to. At this time, the free end of the seal member 103 is pressed toward the washing and dewatering tub 6 by the blowing pressure of the warm air 22 from the duct 23, and comes into pressure contact with the outer peripheral surface of the washing and dewatering tub 6 as shown by a solid line, and the waterproof plate 16 The space B between the washing and the dewatering tub 6 is closed, so that the warm air 22 is all led to the space A. Then, the dewatering hole 1 in the upper part of the side wall surface of the washing dewatering tub 6
01 has a small diameter and a large air resistance, the warm air 22 does not flow into the washing and dewatering tub 6 from here,
Flows into the washing and dewatering tub 6 from the dehydration hole 101 and the vent hole 104 having a large hole diameter at the lower part of the washing water. The warm air 22 comes into contact with the laundry (not shown) containing water placed on the upper surface of the rotary wing 7 on the bottom of the washing / dewatering tub 6 to vaporize the water. The warm air 22a having a high humidity containing the moisture of the laundry is guided above the washing and dewatering tub 6, and is exhausted to the outside of the outer case 1 through the exhaust hole 105 from the upper opening. The above operation is performed for a predetermined time to perform a drying process for drying the laundry. During the drying process, the rotating blades 7 are rotated left and right by the driving device 8 every several tens of seconds for several seconds to oscillate the laundry and generate hot air 2.
2 improves the contact efficiency with the laundry.

Embodiment 2 FIG. FIG. 2 is a sectional view of a washing / drying machine according to Embodiment 2 of the present invention. In the figure, 1
23 are the same as those of the above-described conventional technology, and are denoted by the same reference numerals.
The description is omitted. Reference numeral 106 denotes a washing and dehydrating tub having a truncated cone shape whose diameter increases downward, and a plurality of drain holes 107 are provided on a peripheral wall of a lower portion having a maximum diameter. Reference numeral 108 denotes a flexible member which is located above the inner peripheral end of the balancer 15 and whose upper end is fixed to the lower surface of the waterproof plate 16 and closer to the outer tub 5 of the duct 23 and whose lower end is opposed to the lower end. A ring-shaped sealing member, 109 is a waterproof plate 16
Is a ventilation hole provided in a part of.

Next, a description will be given of the operation of the drying process after the washing, rinsing and dehydrating processes of the washing / drying machine having the above configuration. First, the free end, which is the lower end of the ring-shaped seal member 108, is in a non-contact state with the inner peripheral surface of the balancer 15 as shown by a broken line. The drying process is started, and the hot air generator 19 is operated to generate hot air 22 and pass through the duct 23 to be blown into the washing and dewatering tub 106. At this time, duct 2
3 by the blowing pressure of the warm air 22 from the sealing member 108.
Is pressed against the inner peripheral surface side of the balancer 15 and pressed against the inner peripheral surface of the balancer 15 as shown by the solid line, and the gap B between the waterproof plate 16 and the washing and dewatering tub 106 is closed. The warm air 22 is all guided into the washing / dewatering tub 106.
Since there is no dewatering hole in the upper part of the side wall surface of the washing and dewatering tub 106, most of the hot air 22 is guided to the inner bottom surface of the washing and dewatering tub 106, and the washing containing moisture placed on the upper surface of the rotary wing 7 on this bottom surface. Moisture is vaporized by contact with an object (not shown). Warm air with high humidity due to moisture in the laundry 22
a is guided through the ventilation hole 104 and the drainage hole 107 of the rotary wing as the upward warm air 22a in the clearance space A between the washing and dewatering tub 106 and the outer tub 5 and is guided through the ventilation hole 109 of the waterproof plate. After that, the air is exhausted from the outer case 1 through the exhaust hole 105. The above operation is performed for a predetermined time to perform a drying process for drying the laundry. During the drying process, the rotating blades 105 are driven by the driving device 8.
Thus, the laundry is swung left and right for several seconds every several tens of seconds to swing the laundry, thereby improving the contact efficiency between the warm air 22 and the laundry.

Further, in the second embodiment, even in the case of a washing / dewatering tub having a dewatering hole on the entire peripheral wall surface, the outer peripheral surface of the peripheral wall surface of the washing / dewatering tub is covered with a tubular and water-permeable sleep to remove the laundry. The same effect can be obtained by covering the lower part of the water tank except for the dewatering holes, thereby increasing the air resistance of the upper dewatering holes.

Embodiment 3 FIG. 3 is a sectional view of a washing and drying machine according to Embodiment 3 of the present invention. In the figure, 1
23, 101, 102, 104, and 105 are the same as those in the first embodiment and are denoted by the same reference numerals, and description thereof is omitted. Reference numeral 110 denotes a ring-shaped tube which is located between the waterproof plate 16 and the balancer 15 and is attached to the lower surface of the waterproof plate 16 and is made of a flexible material which expands by a predetermined air pressure. Reference numeral 111 denotes a flexible air introduction pipe that connects the downstream side of the blower 20 of the hot air generator 19 and the tube 110 in a communicating state.

Next, a description will be given of the operation of the drying process after the washing, rinsing and dehydrating processes of the washing / drying machine having the above configuration. First, in a normal state, the tube 110 is not in contact with the upper surface of the balancer 15 as shown by a broken line. When the drying process is started and the hot air generator 19 is operated, the hot air 22 passes through the duct 23 and the washing dewatering tub 6 and the outer tub 5
To the gap A between the two. At this time, the blown air from the blower 20 of the hot air generator 19 is guided into the tube 110 by the introduction pipe 111, and the flexible tube 110 expands due to the air pressure, and presses against the upper surface of the balancer 15 as shown by the solid line. Then, the gap B between the waterproof plate 16 and the washing / dewatering tub 6 is closed. For this reason, the warm air 22 does not flow into the washing and dewatering tub 6 from here, but flows into the washing and dewatering tub 6 through the clearance space A through the dewatering hole 101 having a large hole diameter at the lower portion of the washing and dewatering tub 6 and the rotary blade ventilation hole 104. Flow in. The warm air 22 comes into contact with the laundry (not shown) containing water placed on the upper surface of the rotary wing 7 on the bottom surface of the washing / dehydrating tub 6 to vaporize the water. Warm air with high humidity due to moisture in the laundry 22
“a” is guided upward in the washing and dewatering tub 6, and is exhausted out of the outer case 1 through the outer case exhaust hole 105 from the upper surface opening.
The above operation is performed for a predetermined time to perform a drying process for drying the laundry. During the drying process, the rotating blades 105 are rotated left and right by the driving device 8 every several tens of seconds for several seconds to swing the laundry to improve the contact efficiency between the warm air 22 and the laundry.

The air introduced into the tube 110 may be introduced from another member such as a dedicated blower or an air pump.

Embodiment 4 FIG. 4 is a sectional view showing a washing and drying machine according to Embodiment 4 of the present invention. In the figure, reference numerals 1 to 23, 101, 102, 104, and 105 denote the same parts as those in the first embodiment, and the same reference numerals are given, and description thereof will be omitted. 112 is the upper surface of the balancer 15 and the waterproof plate 6
And an annular thin-plate-like flexible seal member having an inner peripheral end fixed to the upper surface of the balancer 15 and an outer peripheral end being a free end.

Next, the washing / drying operation of the
The operation of the drying process after the rinsing / dehydrating process is described. First, the warm air generator 19 is operated, and the warm air 22 passes through the duct 23 and is guided to the gap A between the washing and dewatering tub 6 and the outer tub 5. At this time, the lower end of the seal member 112 receives the blast pressure and its free end rises to be in contact with the lower surface of the waterproof plate 16. For this reason, the space B between the waterproof plate 16 and the washing and dewatering tub 6 is closed, and the warm air 22 is all led to the space A. Since the dewatering hole 101 in the upper part of the washing and dewatering tub 6 has a small diameter and a large air resistance, the warm air 22 does not flow into the washing and dewatering tub 6 from here, and the dewatering hole with a large hole diameter in the lower part of the washing and dewatering tub 6. It flows into the washing and dewatering tub 6 through the 101 and the rotary blade ventilation holes 104. This hot air 2
Numeral 2 contacts the laundry (not shown) containing water placed on the upper surface of the rotary wing 7 on the inner bottom surface of the washing dehydration tub 6 to vaporize the water. The warm air 22a having a high humidity containing the moisture of the laundry is guided above the washing and dewatering tub 6, and is exhausted to the outside of the outer case 1 through the exhaust hole 105 from the upper opening. The above operation is performed for a predetermined time to perform a drying process for drying the laundry. During the drying process, the rotor 7 is driven by the driving device 8.
Thus, the laundry is swung left and right for several seconds every several tens of seconds to swing the laundry, thereby improving the contact efficiency between the warm air 22 and the laundry.

During the dewatering process, the seal member 112 receives centrifugal force due to the rotation of the washing and dewatering tub 6, and its free end moves in a direction away from the lower surface of the waterproof plate 16 as indicated by a broken line due to the centrifugal force, thereby causing a non-rotation. It will be in contact. Therefore, the seal member 112 and the lower surface of the waterproof plate 16 do not come into contact with each other when the washing and dewatering tub 6 rotates, so that the seal does not wear.

If the seal member 112 is formed in a strip shape with radial cuts, the movement by the blowing pressure or the centrifugal force becomes smoother, and the contact / non-contact state with the waterproof plate 16 is ensured. Obtainable.

In the third and fourth embodiments, the hot air 22 from the hot air generator 19 is guided to the gap A and guided into the washing and dewatering tub 6. However, the same as in the second embodiment. In addition, the same effect can be obtained by a configuration in which the warm air 22 is guided into the washing / dewatering tub 6 and guided through the rotary ventilation hole 104 to the clearance space A. further,
The washing and dewatering tub 6 is not limited to this, and may be the washing and dewatering tub 106 of the second embodiment.

[0025]

Since the present invention is configured as described above, it has the following effects.

The partition member closes the gap between the outer tub and the upper end of the washing and dewatering tub in response to the blowing pressure of the hot air from the hot air supply means, so that the hot blast supply device is inserted into the outer tub from the hot air supply device to the exhaust hole. A constant hot air flow path can be secured, and the laundry in the washing and dewatering tub can be efficiently dried.

Further, since the partition member is a sheet-like member having flexibility, the gap between the outer tub and the upper end of the washing and dewatering tub is reliably formed by the blowing pressure of the hot air from the hot air supply means. Because of the closing, the hot air for drying can be effectively used, the gap can be closed with a small number of parts, and the hot air can be reliably blown into the washing and dewatering tub, and the structure is simple and inexpensive.

Further, since the partition member is a ring-shaped flexible tube which swells with hot air from the hot air supply means, the gap is closed with a simple structure by effectively using the hot air from the hot air supply means. be able to.

Further, since the diameter of the dewatering hole formed on the peripheral wall surface of the washing dewatering tub is smaller than that of the lower part of the peripheral wall surface, the upper dewatering hole has a large air resistance and is directed toward the lower dewatering hole having a small air resistance. The hot air from the hot air supply means flows easily, and the hot air easily flows to the bottom in the washing / dewatering tub, so that the laundry can be efficiently dried.

Further, the shape of the peripheral wall surface of the washing and dewatering tub is formed in a truncated cone shape having a large diameter at the bottom, and a dewatering hole is formed only in the lower half thereof, so that the volume below the washing and dewatering tub is large. Hot air is easily guided, and warm air is guided from the dewatering hole provided in the lower half to the inner bottom of the washing dewatering tub, so that the laundry can be efficiently dried.

[Brief description of the drawings]

FIG. 1 is a sectional view of a washing and drying machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a washing and drying machine according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a washing / drying machine showing a third embodiment of the present invention.

FIG. 4 is a sectional view of a washing and drying machine according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a conventional washing and drying machine.

[Explanation of symbols]

1 outer box, 2 top cover, 3 opening, 4 lid, 5
Outer tub, 6 washing and dewatering tub, 7 rotating wings, 8 driving device,
9 motor, 10 motor pulley, 11 belt, 12
Main shaft pulley, 13 gear device, 14 clutch device, 15 balancer, 16 waterproof plate, 17 water supply valve,
18 drain valve, 19 hot air generator, 20 blower, 2
1 heater, 22 hot air, 22a hot air with high humidity, 2
3 duct, 101 dehydration hole, 102 ventilation hole, 103
Seal member, 104 vent hole, 105 exhaust hole.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaji Kugino 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Shinsuke Ise 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsui Electric Co., Ltd. (72) Kazuhiko Manya 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Takeshi Saito 1-1-1, Yamate, Funabashi-shi, Chiba Japan (72) Inventor Kunio Inose 1-1-1, Yamate, Funabashi-shi, Chiba

Claims (5)

[Claims] An outer case, an outer tub supported in the outer case, a washing / dewatering tub rotatably disposed in the outer tub, having an upper surface opened and having a dewatering hole formed in a peripheral wall surface; In a washing / drying machine including a rotating blade provided at an inner bottom portion of a washing and dewatering tub and a hot air supply means for supplying warm air into the washing and dewatering tub during a drying process, Air is supplied directly from the upper opening of the washing and dewatering tub or from the upper part of the outer tub through the dewatering hole, and hot air is supplied from the hot air supply means between the outer tub and the upper end of the washing and dewatering tub. A washing / drying machine provided with a partition member for closing a gap between the outer tub and the upper end of the washing / dewatering tub in response to the blowing pressure. 2. The washing and drying machine according to claim 1, wherein the partition member is made of a flexible sheet member. 3. The partitioning member comprises a ring-shaped flexible tube which expands by the blowing pressure when hot air is supplied from a hot air supply means and closes a gap between the outer tub and the upper end of the washing and dewatering tub. The washing / drying machine according to claim 1, wherein: 4. The dewatering hole formed on the peripheral wall surface of the washing / dewatering tub has a smaller hole diameter than that located at the upper part of the peripheral wall surface. The washing and drying machine as described. 5. The washing and dewatering tub according to claim 1, wherein the shape of the peripheral wall surface is formed in a truncated cone shape having a large diameter at a lower portion, and a dehydration hole is formed only in a lower half portion thereof. Or a washer / dryer as described.