JP2011167428A - Clothes dryer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise generated by high voltage and high speed and provide a large air volume with a single blower fan, whereby reducing clothes wrinkles using the dryer in low power consumption. <P>SOLUTION: The clothes dryer includes a blower 50 which blows drying air into a drum 1, wherein the blower 50 includes: a casing; a blower fan 52 which is freely rotatably arranged in the casing; and a fan motor 53 which rotatably drives the fan 52. The fan 52 includes multiple blades clamped between a main plate and a shroud plate. An exit angle on the edge of the blades at the shroud plate side is smaller than that on the edge of the blades at the main plate side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a clothes dryer for drying clothes and the like.

  Conventionally, this type of clothes dryer blows air for drying through an air passage into a drum containing clothes, etc., and contacts the clothes stirred in the drum to remove moisture from the clothes and dry it. The drying air that has become humid due to moisture is discharged to the air passage outside the drum. In particular, since clothes are dried in a limited narrow space in the drum, there is a problem that the clothes after drying are in a state of strong wrinkles, and various methods have been considered for solving the problem (for example, , See Patent Document 1).

  FIG. 10 shows a conventional drum-type washing and drying machine described in Patent Document 1. As shown in FIG. 10, during the drying operation, from the first air inlet 72 provided at the outlet of the first air passage 71 and from the second air inlet 74 provided at the outlet of the second air passage 73. The drying air is blown into the rotary drum 75. A first blower fan 76 is provided in the first air passage 71, and a second blower fan 77 is provided in the second air passage 73. The first blower fan 76 and the second blower fan 77 increase the amount of air blown into the rotary drum 75 to promote the evaporation of moisture from the clothing 78 to shorten the drying time.

  In addition, the second air passage 73 blows high-pressure air at a high speed from a second blowing port 74 provided at the lower portion of the opening 79 of the rotating drum 75, and the clothes 78 are stirred in the rotating drum 75. I try to spray it. Accordingly, the clothes 78 can be stirred while being lifted, and the clothes 78 are less wrinkled and the finish after drying is improved.

  In addition, a washing / drying machine provided with a multiblade turbofan capable of obtaining a large air volume is also considered as a blowing means for blowing drying air into the rotating drum (see, for example, Patent Document 2).

JP 2009-72502 A JP 2008-104478 A

  However, in the above-described conventional configuration, high-pressure and high-speed air is blown into the rotary drum. However, since the amount of work increases in general when the same air volume is blown at a higher pressure and higher speed, the second blower fan 77 Motor power consumption increases. Moreover, since the two fan motors of the first and second blower fans 76 and 77 are used to increase the air volume, there is a problem that the power consumption is further increased.

  Also, in a washing / drying machine equipped with a washing function, the drum rotates at a high speed during the dehydration process, so that wind is generated at the outer periphery of the drum and circulates in the circulation circulation passage for drying, resulting in windage loss and the drum drive motor This causes a load on 80 and increases power consumption. Therefore, in the configuration having two air passages and two blower fans, the increase in power consumption is further increased.

Therefore, it is conceivable to use the multi-blade turbofan described in Patent Document 2 that can obtain a large airflow and solve the above problem with one large airflow fan. However, there are the following new problems. That is, when a multi-blade turbofan capable of obtaining a large air volume is operated at a high pressure and a high speed, noise increases. If the shape of the blower fan is set to reduce the noise at the high pressure and high speed, the air volume is reduced and a large air volume cannot be obtained. In other words, there is a problem that it is difficult to simultaneously achieve a high air volume while reducing noise at high pressure and high speed with one blower fan.

  The present invention solves the above-described conventional problems, and provides a clothes dryer capable of reducing noise and wrinkle with low power consumption while realizing high pressure and high speed noise reduction with a single blower fan. The purpose is to do.

  In order to solve the above-described conventional problems, the clothes dryer of the present invention includes a blowing unit that blows drying air into a drum, and the blowing unit is disposed in a casing and rotatably in the casing. A blower fan, and a fan motor that rotationally drives the blower fan, the blower fan having a plurality of blades sandwiched between a main plate and a shroud plate, and an exit angle of an end of the blade on the shroud plate side Is smaller than the exit angle of the end of the blade on the main plate side.

  This makes it possible to reduce noise during high pressure and high speed and a large air volume with a single blower fan, and to reduce wrinkles during drying with low power consumption.

  The clothes dryer of the present invention has a low power consumption of the blower fan motor, can reduce noise during the drying operation, and can reduce wrinkles after the completion of drying.

Sectional drawing of the clothes dryer provided with the washing function in the 1st Embodiment of this invention Configuration diagram of air blowing means of the clothes dryer Perspective view of the blower fan of the clothes dryer Cross section of blower fan of the clothes dryer (A) AA sectional view of the blower fan of the clothes dryer (b) BB sectional view (A) (b) Explanatory drawing of the wind which flows through the inside of the ventilation fan of the clothes dryer Perspective view of the main part of the blower fan of the clothes dryer Top view of the main part of the blower fan of the clothes dryer The principal part perspective view of the ventilation fan in the 2nd Embodiment of this invention Sectional view of a conventional drum-type washing and drying machine

  1st invention is equipped with the bottomed cylindrical drum which accommodates the clothes etc. to dry, the drum drive motor which rotationally drives the drum, and the ventilation means which ventilates the air for drying in the drum, The said ventilation The means includes a casing, a blower fan rotatably disposed in the casing, and a fan motor that rotationally drives the blower fan. The blower fan includes a plurality of blades sandwiched between a main plate and a shroud plate. And the shroud plate end of the blade is smaller than the exit angle of the end of the blade on the main plate side, so that the shroud side of the blade retreats more with respect to the rotation direction of the blower fan. The blade can be made into a blade, and at the time of high wind speed, it is possible to make the separation of the wind easily at the suction surface on the shroud side of the blade, and the noise of the blower fan during the drying operation is reduced. Door can be. Therefore, it is possible to reduce noise at high pressure and high speed and a large air volume with one blower fan, and to reduce the power consumption of the blower fan motor.

  In the second invention, in particular, the blower fan according to the first invention has a blade fixed between the main plate and the shroud plate, and an outlet at an end portion on the shroud plate side at an outlet side from an outermost peripheral portion of the fixed portion of the blade. By making the angle smaller than the exit angle of the end of the blade on the main plate side and forming the blade inside the outermost peripheral portion of the fixed portion with one arc, the outermost peripheral portion of the fixed portion is on the outlet side. In addition, the blades can be formed firmly, the manufacture of the blower fan can be facilitated, and the flow of wind flowing between the blades can be kept along the blade surface to reduce the Noise can be reduced.

  According to a third aspect of the present invention, in particular, the blower fan according to the second aspect of the present invention forms an inclined portion by making the exit angle of the end of the blade on the shroud plate side smaller than the exit angle of the end of the blade on the main plate side. By providing dimples in the inclined portion, the wind between the blades can be made to follow the surface of the blade more, the separation between the blades can be eliminated, and the noise of the blower fan can be further reduced.

  In particular, the fourth aspect of the invention relates to the clothes dryer according to any one of the first to third aspects of the invention, a first air passage for blowing a large amount of air for drying in the drum, and high-speed drying in the drum. A second air path for blowing the working air, an air path switching means for switching the first air path and the second air path, a control means for controlling the air path switching means, and the air in the drum A drying device that dehumidifies and heats the drying air is provided, and the control unit switches from the first air path to the second air path during the drying operation. Depending on the progress of drying of clothing during the drying process and the way of wrinkle fixing, the process of drying with less power consumption and the process of constantly moving the clothes to stretch the fibers so that wrinkles do not stick are separated. A drying step can be performed. That is, in the early stage of the drying operation in which a lot of moisture is contained in the garment, a large amount of drying air is applied to the garment in the first air passage with a large air passage cross-sectional area and a small pressure loss. The drying time is shortened by evaporating the air and the power consumption of the blower fan motor is low. After the drying process, the air passage cross-sectional area is small, and the clothes are spread and wrinkled by applying high-speed and high-speed drying air obtained by rotating the blower fan motor at a high rotational speed. The amount of power consumption can be reduced by effectively drying with one air blowing means.

  In particular, the fifth aspect of the invention relates to the clothes dryer according to any one of the first to fourth aspects of the invention, a bottomed cylindrical drum that houses laundry, a drum drive motor that rotationally drives the drum, A water tank containing a drum and elastically supported in the housing, a water supply means for supplying washing water into the water tank, a drainage means for draining the washing water into the water tank, and blowing air for drying into the drum Blowing means, a drying device for dehumidifying and heating the drying air blown into the drum, and a control means for controlling the drum drive motor, water supply means, drainage means, blower means, etc. are provided, and the control means By providing a washing function that sequentially controls each of the steps of washing, rinsing, dewatering, and drying, it is possible to carry out consistently from washing to drying in the same drum.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a clothes dryer having a washing function according to the first embodiment of the present invention, FIG. 2 is a configuration diagram of a blower unit, FIG. 3 is a perspective view of a blower fan, and FIG. FIG. 5A is a sectional view taken along line AA of the blower fan, FIG. 5B is a sectional view taken along line BB, FIG. 6 is an explanatory view of the air flowing inside the blower fan, and FIG. FIG. 8 is a partial top view of the blower fan.

1-8, the cylindrical drum 1 which accommodates the laundry is contained in the cylindrical water tank 3 which is elastically supported in the housing | casing 2 and stores wash water, and takes in and out the laundry to the front. Opening 1a
A lid 1b that opens and closes is provided. A drum drive motor 4 is attached to the rear surface of the water tank 3 to rotate the rotating shaft 1c of the drum 1 while tilting it forward.

  The drying air for drying the clothes is blown into the drum 1 by the blowing means 50, deprives moisture from the laundry in the drum 1 and becomes humid, and a number of openings 1d provided around the side surface of the drum 1 , The water is discharged out of the water tank 3 through the discharge port 3 a provided in the upper front part of the water tank 3. The discharged drying air is cooled and dehumidified by the dehumidifying means 6 to become low-temperature dry air. The drying air dehumidified by the dehumidifying means 6 is heated by the heating means 7 to become dry hot air.

  The drying air that has passed through the dehumidifying means 6 and the heating means 7 and turned into dry warm air passes through the first air passage 9 leading to the first air outlet 8 provided at the rear of the drum 1 or the front of the drum 1. It blows out into the drum 1 through one of the second air passages 11 leading to the second air outlet 10 provided in

  The first air passage 9 is formed to have a large cross-sectional area through which drying air passes, has a small pressure loss, and can blow out a large amount of air. The second air passage 11 is formed with a small cross-sectional area through which drying air passes, and the second air outlet 11 can reduce the cross-sectional area at the second air outlet 10 to blow out high-pressure and high-speed wind.

  Normally, in the case of a drum type washing and drying machine, the gap between the front of the rotating drum 1 and the water tank 3 is made as small as possible so that clothing does not get caught, and a wide opening in this gap causes pressure loss. Although it is difficult to provide a small number of air outlets, the second air outlet 10 that has a small air passage cross-sectional area and blows out high-pressure and high-speed wind can be reasonably provided.

  On the other hand, it is possible to provide a large opening on the bottom surface on the back side of the drum 1, and if a cover having a large opening ratio made up of a large number of small-diameter holes that can ventilate the garment is used, the pressure loss does not occur. The 1st blower outlet 8 with few can be provided.

  In addition, when the rotating shaft 1c of the drum 1 is tilted forward and rotated to stir the clothes, small clothes such as socks, handkerchiefs and briefs tend to be biased to the back of the drum 1, and long sleeve underwear, trousers and long sleeves Long items such as cutter shirts and long-sleeved pajamas tend to be biased to the front of the drum 1.

  Accordingly, when a large amount of drying air is blown out from the first outlet 8 located in the rear back of the drum 1, the wind strikes the small clothes that are biased to the back of the drum 1, and the drum passes through the small articles and passes through the drum. Since it reaches the long clothes in front of 1, the small and long items can be efficiently dried, and the small items can be dried with relatively little wrinkles.

  On the other hand, long items that are easily twisted due to stirring during drying and tend to wrinkle tend to be biased to the front of the drum 1, so that drying is quick and high pressure and high speed when the wind is applied from the second outlet 10 located in front. By applying the wind, clothing easily spreads and moves well with the wind, so the wrinkle reduction effect is great.

  The air path switching unit 12 switches the passage path of the drying air to either the first air path 9 or the second air path 11. The air path switching means 12 has a switching valve 12a that can rotate. When the switching valve 12a is located on the a side in FIG. 1 and the second air passage 11 side is closed, the first air passage 9 side is opened, and the drying air blown by the blowing means 50 is the first air passage. 9 is blown out from the first outlet 8 into the drum 1.

When the switching valve 12a is located on the b side in FIG. 1 and the first air passage 9 side is closed, the second air passage 11 side is opened, and the drying air blown by the blowing means 50 is the second air passage. 11 is blown out into the drum 1 from the second outlet 10.

  The circulation air passage 13 is provided with an air blowing means 50, and the air passage switching means 12 is disposed on the downstream side of the air blowing means 50. The drying air that has become humid in the drum 1 enters the circulation air passage 13 from the discharge port 3a, passes through the dehumidifying means 6 and the heating means 7, and again enters the drum 1 from the first air outlet 8 or the second air outlet 10. Circulate to

  The drying air blown to the circulation air passage 13 by the air blowing means 50 has a larger amount of air passing through the first air passage 9 than the amount of air passing through the second air passage 11. The wind speed passing through the second air outlet 10 is faster than the air speed passing through the first air outlet 8, and the air path switching means 12 is operated during the drying operation, and the first air path 9 through the second air path. 11 is switched.

  The discharge port 3 a is located near the front of the drum 1 and is disposed at a position away from the first air outlet 8. The damper 14 that supports the aquarium 3 attenuates the vibration of the aquarium 3 when the drum 1 is rotated in a weight unbalanced state that occurs due to uneven clothing in the drum 1 during dehydration or the like. The damper 14 is provided with a cloth amount detecting means 15 for detecting the amount of clothing by detecting the amount of displacement of the shaft of the damper 14 up and down due to the weight change caused by the clothing in the water tank 3 to be supported.

  The drying device 21 includes a heat pump device, and includes a compressor 16, a radiator (heating means) 7 that radiates heat of the compressed high-temperature and high-pressure refrigerant, and a throttle means 17 for reducing the pressure of the high-pressure refrigerant. The refrigerant, which has been decompressed to a low pressure, is connected to a heat absorber (dehumidifying means) 6 that takes heat from the surroundings by a pipe 18 through which the refrigerant circulates. The heat absorber in the heat pump device is the dehumidifying means 6, and the radiator is the heating means 7.

  The drying device 21 includes, in addition to the heat pump device, a blower unit 50, a circulation air passage 13, a first air passage 9, a second air passage 11, and the like through which drying air blown by the blower unit 50 passes. .

  The control means 30 controls the drum drive motor 4, the water supply means (not shown), the drainage means 19, the drying device 21 that dehumidifies and heats the drying air blown into the drum 1, the air path switching means 12, and the like. The steps of washing, rinsing, dehydration and drying are sequentially controlled, and the first air passage 9 is switched to the second air passage 11 during the drying operation.

  The dehumidifying means 6 may be a water-cooled type that cools drying air moistened by cold water, an air-cooled type that blows cool air, or a combination of these. The heating means 7 may be a heater and is not limited to a heat pump device.

  Next, the air blowing means 50 will be described with reference to FIGS. The blower means 50 includes a casing (spiral casing) 51, a blower fan 52 rotatably disposed in the casing 51, and a fan motor 53 that rotationally drives the blower fan 52.

  The blower fan 52 has a large number of blades 52a (only part of which is shown in FIG. 2) arranged in a donut shape, and both ends of the blades 52a are sandwiched between a main plate 52b and a shroud plate 52c, and are fixed by a plurality of fixing portions 52d. is doing. The blades 52a, the main plate 52b, and the shroud plate 52c are formed of a thin metal plate such as aluminum, for example.

  The fixing portion 52d is provided with a slit for inserting a protrusion provided at the end of the blade 52a in the main plate 52b, and is fixed by caulking that pressurizes the protrusion while the protrusion is inserted into the slit. The shroud plate 52c is also fixed in the same manner, and both ends of the blade 52a are fixed to the main plate 52b and the shroud plate 52c to form the blade 52a.

  The shape of the blade 52a viewed from above is as shown in FIG. 5A is a cross-sectional view taken along AA (shroud plate 52c side) in FIG. 4, and FIG. 5B is a cross-sectional view taken along BB (main plate 52b side) in FIG. 4, and the shroud plate 52c side of the blade 52a is shown. Is set to be smaller than the exit angle β at the end on the main plate 52b side. And the blade | wing 52a by the side of the shroud plate 52c inside the outermost peripheral part of the adhering part 52d in the radial direction is formed by the same single arc as the main plate 52b side. By setting the outlet angle α to be smaller than the outlet angle β, the outlet side of the outermost peripheral portion in the radial direction of the fixing portion 52d has a shape in which the outlet angle of the blade 52a is laid back in a direction retreating with respect to the rotation direction. .

  As a result, the blade 52a has a uniform arc shape from the shroud plate 52c to the main plate 52b on the inner side of the outermost peripheral portion in the radial direction of the fixing portion 52d, but outside the outermost peripheral portion in the radial direction of the fixing portion 52d. The blade 52a angle on the shroud plate 52c side is gradually twisted from the main plate 52b to the shroud plate 52c so as to recede further with respect to the rotation direction, thereby forming an inclined portion 52e.

  The operation of such a configuration will be described with reference to FIG. 6A is a BB (main plate 52b side) in FIG. 4, and FIG. 6B is an AA (shroud plate 52c side) in FIG. 4, each of which has a main plate 52b side of the blade 52a, The flow direction of the wind on the shroud plate 52c side is shown.

  Wa (Wa ') is a component that the wind tends to jump out toward the outer periphery of the blade 52a, Wb (Wb') is a component that the wind that depends on the rotational speed of the fan or the like tends to flow in the circumferential direction, and Wc ( Wc ′) is a component indicating the actual wind relative speed determined by them.

  In general, in the centrifugal fan configured as in the present invention, the wind entering the fan is likely to flow to the main plate 52b side and not to the shroud plate 52c side. Therefore, as shown in FIG. 6, Wb on the shroud plate 52c side. 'Becomes smaller than Wb on the main plate 52b side. For this reason, the wind flowing between the blades relatively flows along the blade 52a on the main plate 52b side of the blade 52a. However, on the shroud plate 52c side, it is more strongly affected by the circumferential component Wb ′. On the negative pressure side, the wind flows away from the blades 52a, and a separation region where some of the wind does not flow easily occurs, resulting in an increase in noise.

  As in the present invention, in order to flow a high wind speed wind, it is necessary to increase the rotational speed of the fan, so the influence of the circumferential component becomes stronger, and the above phenomenon becomes more prominent. Noise increases.

  In the present invention, only the shroud plate 52c side of the blade 52a is made to move backward, so that the wind flowing between the blades is along the blade 52a, the separation region is eliminated, and noise reduction is realized. In general, when the blade 52a is a retreating blade, the air volume is reduced. Therefore, the air flow when a large amount of air is desired to flow by retreating only the blade 52a on the shroud plate 52c side which is susceptible to these effects. It suppresses the decrease and reduces the deterioration of the air blowing performance.

  Further, since the blade 52a is twisted only outside the outermost peripheral portion of the fixing portion 52d, that is, at the outlet side, it can be performed in the same manner as the case where the blade 52a is fixed to the shroud plate 52c and the main plate 52b. The strength of the blade 52a can be maintained without deteriorating the fixing strength.

About the clothes dryer of this invention comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. If clothes etc. are dried in the narrow drum 1, many wrinkles will generate | occur | produce and remain in clothes etc. This is because the clothes cannot be dried in a state where the clothes are spread in the narrow drum 1. Especially, the finish of clothing using a lot of cotton is bad. In cotton fibers, if moisture is present in the fibers, the fibers can move freely, so that the clothes are agitated by the rotation of the drum 1 and are stretched in the next direction even when bent by mechanical force. When force is applied, the bent part will stretch and will not remain as wrinkles.

  However, when drying progresses and moisture decreases, the binding force between cotton fibers increases and the movement of the fibers worsens. If the fiber is bent by mechanical force at this time, it will be easier to maintain that state, and if drying progresses and moisture decreases, the fiber will not bend even if force is applied in the direction of stretching, This state is called wrinkle fixation. In order to dry, the water must be evaporated, and when the water runs out, the wrinkles are fixed and the contradictory phenomenon occurs.

  The more wrinkles stick, the less dry the finish. Since it is inevitable that the fiber is bent in the narrow drum 1, reducing the wrinkles reduces the number of wrinkles and avoids the fiber being bent at an acute angle and tightly sticking. It is important. Accordingly, it is desirable that the bending position is changed frequently so that the bent portion is stretched and the other portion is bent, so that the drying proceeds while the fiber is stretched or bent.

  On the other hand, in a state where drying progresses and moisture disappears in a state where the fibers are stretched, the fibers are strongly bonded to each other even if mechanical force is applied in the bending direction, so that they are not easily bent and become new wrinkles. From the above, there are areas where wrinkles are likely to stick depending on the dry state and areas where wrinkles are not. In terms of the drying rate, wrinkles are most likely to adhere in the region of about 90% to about 100%.

  On the other hand, even one piece of clothing does not dry evenly and has uneven drying. For example, the armpit of a long-sleeved shirt is the slowest to dry. For this reason, normally, the drying rate at the end of drying is not designed to be 100%, but is designed to end in an overdried state, that is, a drying rate of 102 to 105%. Therefore, when the drying process is expressed in terms of the drying rate, the early stage is a region where wrinkles are difficult to stick from immediately after dehydration to a drying rate of about 90%, the middle zone is a region where wrinkles are generated from about 90% to about 100%, and sticking increases, and the end stage Is an area where wrinkles exceeding 100% are unlikely to occur.

  In the present invention, in the middle stage, the clothes are stretched to increase the high-pressure and high-speed wind, which is effective in reducing wrinkles, and at least one of the early stage and the final stage, a large amount of wind is applied to the clothes to save energy. So as to switch the air path.

  Thus, by switching the rotation speed of the 1st blower outlet 8 and the 2nd blower outlet 10, and the ventilation fan 52 of the ventilation means 50 in the middle of drying operation, it is higher than the high wind speed in the middle of drying by one ventilation means 50. Since there is a timing for drying with a large air volume that consumes less power, the high-speed, high-speed drying air is always blown out as before, and two fan motors are always used to increase the air volume. Compared to this, it is possible to achieve a dry finish with less total power consumption and less wrinkling of clothing. Moreover, the noise at the time of the high wind speed which made the rotation speed of the ventilation fan 52 high can be suppressed.

  Further, by disposing the discharge port 3a near the front of the drum 1 and at a position far from the first air outlet 8, clothing and a large amount of drying air are allowed to flow from the first air outlet 8 at the rear. Efficient contact and drying with low power consumption. Further, when the air is blown from the front second air outlet 10, even if the discharge port 3 a is close to the second air outlet 10, the air for high-pressure and high wind speed blows out, so that the drying air is behind the drum 1. And air with high wind speed can be brought into contact with the clothes being stirred.

(Embodiment 2)
FIG. 9 is a perspective view of a main part of the blower fan according to the second embodiment of the present invention. A feature of the present embodiment is that the inclination is formed by making the exit angle α of the end of the blade 52a of the blower fan 52 on the shroud plate 52c side smaller than the exit angle β of the end of the blade 52a on the main plate 52b side. The portion 52e is provided with a large number of dimples 52f. Other configurations are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description of the first embodiment is used.

  According to the above configuration, the wind between the blades can be made to follow the surface of the blade 52a, the separation between the blades can be eliminated, and the noise of the blower fan 52 at the time of high pressure and high wind speed can be further reduced. .

  As described above, the clothes dryer according to the present invention has low power consumption of the blower fan motor, can reduce noise during the drying operation, and can reduce wrinkles after the end of drying. Useful as a clothes dryer.

DESCRIPTION OF SYMBOLS 1 Drum 4 Drum drive motor 50 Blower means 51 Casing 52 Blower fan 52a Blade 52b Main plate 52c Shroud plate 52d Adhering part 52e Inclined part 53 Fan motor

Claims (5)

A bottomed cylindrical drum that houses clothes to be dried, a drum drive motor that rotationally drives the drum, and a blowing unit that blows drying air into the drum, the blowing unit including a casing, A blower fan rotatably disposed in the casing; and a fan motor for rotationally driving the blower fan, the blower fan having a plurality of blades sandwiched between a main plate and a shroud plate, The clothes dryer which made the exit angle of the edge part by the side of the said shroud plate smaller than the exit angle of the edge part by the side of the main plate of the said blade | wing. The blower fan has the blade fixed between the main plate and the shroud plate, the outlet angle of the end portion on the shroud plate side at the outlet side from the outermost peripheral portion of the fixed portion of the blade, and the end of the blade on the main plate side. The clothes dryer according to claim 1, wherein the blade is smaller than an exit angle and the blades inside the outermost peripheral portion of the fixing portion are formed by one arc. The blower fan is configured such that an inclined angle is formed by making an outlet angle of an end portion on a shroud plate side of a blade smaller than an outlet angle of an end portion on the main plate side of the blade, and dimples are provided on the inclined portion. Clothes dryer. A first air passage for blowing a large amount of drying air into the drum, a second air passage for blowing high-speed drying air into the drum, and the first air passage and the second air passage. An air path switching means for switching, a control means for controlling the air path switching means, and a drying device for dehumidifying and heating the drying air blown into the drum are provided, and the control means is configured to perform the first operation during the drying operation. The clothes dryer according to any one of claims 1 to 3, wherein the first air path is switched to the second air path. A cylindrical drum with a bottom for accommodating laundry, a drum drive motor for rotating the drum, a water tank containing the drum and elastically supported in a housing, and a water supply means for supplying washing water into the water tank Draining means for draining washing water into the water tank, blowing means for blowing drying air into the drum, drying apparatus for dehumidifying and heating the drying air blown into the drum, and the drum A control means for controlling a drive motor, water supply means, drainage means, air blowing means, etc. is provided, and the control means comprises a washing function for sequentially controlling each step of washing, rinsing, dewatering and drying. The clothes dryer of any one of Claims.