JP4852505B2 - Dryer and washing dryer - Google Patents

Description

  The present invention relates to a dryer or a washing dryer provided with means for drying clothes.

  A drum-type washing and drying machine has a drum rotatably arranged in a horizontal or substantially horizontally inclined water tank, and the drum is rotated around a rotating shaft to wash, rinse and dehydrate laundry. , Until drying. To dry moisture-containing laundry, the air inside the drum containing moisture is exhausted out of the water tank, dehumidified by the dehumidifying means, heated by the heating means, and dried by being pressurized and accelerated by the fan. The laundry is dried by repeating the drying cycle of evaporating moisture from the laundry by blowing the air into the drum.

  In JP-A-8-47599, one of the dry air flowing out from the blower means has a bypass flow path to the drying cabinet, and the other has a branch flow path that flows into the drying cabinet via the dehumidifying means, The structure which provided the blower outlet of the path above the drying cabinet and the blower outlet to the drying cabinet via the dehumidifying means is disclosed below.

  Japanese Patent Laid-Open No. 8-229297 discloses a configuration in which an object to be dried is dried by two air flows: drying air that has been dehumidified and heated, and drying-promoting air that is blown from an air passage.

  In Japanese Patent Application Laid-Open No. 09-000774, high-pressure hot air is blown to the center of the pulsator, and hot air is removed from a ring-shaped blowing duct provided around the entire gap between the pulsator and the dewatering tank on the bottom. A configuration is disclosed in which clothes are stirred by blowing up along the inner wall of a water tank to promote the jumping of clothes.

  Japanese Patent Laying-Open No. 2006-000354 discloses a configuration in which drying air is blown from both the front and rear of a rotating drum.

JP-A-8-47599 JP-A-8-229297 JP 09-000774 A JP 2006-0003454 A

  The clothes are pressed against the wall surface of the rotating drum by the centrifugal force at the time of dehydration and become solidified, and the drying process starts from that state, so the clothes do not come loose during drying, and the clothes are entangled and dried. Wrinkles may increase even when finished.

  In addition, it has been conventionally known that wrinkles can be reduced as the volume increases. However, in laundry dryers for home use, laundry is limited due to the size of the installation location and restrictions on the delivery path (corridor and door) to the installation location. The size of the dryer is limited, and it has been difficult to secure a sufficient volume. For this reason, clothing that cares about the finish of drying is separated from other general clothing, and there is only a method of drying by reducing the amount of clothing. However, it is not realistic to perform time-consuming drying several times, and many people do not use a dryer because such clothes are dried by hanging.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a dryer or a washing / drying machine with improved drying finish without increasing the volume of the drum.

  Accordingly, in one aspect of the present invention, the drying operation includes a rotating drum in which clothing is accommodated, a motor that drives the rotating drum, and a casing that supports the rotating drum, and the drying operation is performed. Inside, there is provided means for blowing air directly from below on the clothes accommodated in the rotating drum.

  Further, according to one aspect of the present invention, in the washing / drying machine, a means for blowing air directly from below onto the clothes accommodated in the rotating drum is provided during the drying operation. It is characterized by comprising a blowing port provided on the discharge side and a blowing path connecting the blowing means and the blowing port via a position higher than the overflow port.

  ADVANTAGE OF THE INVENTION According to this invention, it has the effect of extending a wrinkle of clothing and improving a dry finish by agitating while lifting clothing by directly blowing high-pressure air onto clothing in a rotating drum from below.

  Further, according to the present invention, by providing the air passage connecting the air blowing means and the air blowing port via a position higher than the overflow port, the air blowing port provided below the drum of the washing / drying machine (high pressure ) Even in the configuration in which air is blown, the problem that washing water flows into the duct of dry air from the blowing port in the washing process can be solved.

Example 1
The structure of the drum type washing machine according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a partially cut perspective view showing the whole and internal structure of a drum type washing / drying machine according to the present invention, FIG. 2 is a rear view, FIG. 3 is a right side view, and FIG. 4 is a sectional view showing the structure of a second air passage. FIG. 5 is a cross-sectional view showing the configuration of the bottom surface from the opening side of the rotating drum 4.

  In the drum type washing / drying machine main body 1, a water tank 4 whose front side is opened on a base 3 is supported by a suspension 2 so as to be inclined substantially horizontally, and the suspension reduces vibration during operation of the water tank 4. In addition, an elastic force generated by the spring and a damping force are generated by enclosing oil, for example. Inside the water tank 4, a rotating drum 5 that is pivotally supported and opened on the front side is disposed, and is rotated by a driving force of a driving motor 8 provided on the back surface of the water tank 4. An opening 6 is formed on the front side of the drum-type washing / drying machine main body 1, and the user puts the laundry 14 into the drum through the opening 6, or the laundry 14 after washing / drying is completed. It can be taken out. For taking out the laundry 14, a lid 7 for opening and closing the opening 6 is provided. For example, the lid 7 is pivotally supported and can be opened to the open position shown by 7 '.

  The opening 6 on the front side of the main body 1 and the front side of the water tank 4 are connected by a bellows 9 formed of a flexible material such as rubber, for example, and when the lid 7 is closed, a part of the bellows 9 is connected. Is in contact with the lid 7 to ensure water sealing even when the water tank 4 vibrates.

  A drying means 11, which is a first air duct, is disposed at the upper right corner when viewed from the front surface of the water tank 4. The drying means 11 in the present invention includes a dehumidifying duct 13, a filter 16, a communication path 17, a fan 18, a heater 21, a blowing duct 22, and a connection air path 24.

  Moist air containing moisture from the laundry 14 inside the drum 5 is discharged in the direction of the arrow 30 from the first exhaust port 12 provided at the lower back of the water tub 4, and from substantially below to above along the back of the water tub 4, for example, A dehumidifying duct 13 is provided that includes dehumidifying means such as a heat exchanger for dehumidifying the moisture in the moist air by condensing the moisture in the moist air by flowing cooling water. The water tank 4 and the dehumidifying duct 13 are connected by a bellows 15 that can be expanded and contracted. On the upper surface of the outer tub 4, the dehumidification duct 13 is connected to the connection air passage 24, the connection air passage 24 extends toward the front surface substantially along the rotation axis of the drum 5, and the air blows in the direction of the arrow 31. Is done. The connection air path 24 is connected to the filter 16, and the filter 16 collects lint that is fiber waste contained in the air. The filter 16 is provided so as to be removable from the front side of the washer / dryer body 1, and the user can remove the filter 16 and clean the collected lint.

  The air in which the lint has been collected in the filter 16 passes through a communication path 17 provided between the water tank 4 adjacent to the filter 16 and connected to the fan 18 in the direction of the arrow 32. It is introduced into the center of rotation of the rotary blade 19 provided inside. As described above, the fan 18 is a so-called centrifugal sirocco fan or turbo fan, and the rotating blade 19 is rotated by a fan drive motor 20 to accelerate air by centrifugal force. The outer shape of the fan 18 will be described. The rotary blade 19 has a substantially disk shape, and the main body of the fan 18 has a substantially cylindrical shape with a spiral shape in which the radius gradually increases around the rotary blade 19. The air blown out from around the fan is guided in the direction of the fan exhaust port. An opening for allowing air to flow in is provided at the rotation center of the rotary blade 19 on one surface of the first fan 18, and a fan having a smaller diameter than the outer diameter of the first fan 18 is provided on the opposite side of the opening. The drive motor 20 protrudes concentrically with the rotary blade 19.

  The accelerated air is heated when passing through the heater 21 to become dry warm air, passes through the blow-in duct 22 via the bellows 25, and passes through the blow-in duct 22 to the drum 5 from the first blow-in opening 23 opened at the upper front of the water tank 4. Is blown in the direction indicated by the arrow 34. The warm air blown into the drum heats the laundry 14 to evaporate moisture to become humid air, and is sucked out of the water tank 4 from the first exhaust port and dehumidified through the dehumidifying duct 13 again. The wet garment is dried by continuously repeating the drying cycle as described above.

  Next, the configuration of the second air passage 51 will be described. A second exhaust port 52 is provided on the back surface of the water tank 4 and is connected to an exhaust duct 53. A connection pipe 54 is connected to the exhaust duct 53 and is connected to a second fan 56 via a silencer 55. The silencer 55 is, for example, a cylinder provided with a sound absorbing material inside. A rotary blade (not shown) that is connected to the second fan motor 63 and rotates is provided inside the second fan 56, and the air sucked from the exhaust duct 53 is accelerated by rotating the rotary blade. Then, it passes from the front side through the connecting pipe 57 and the direction changing portion 58 and through the second blowing port 60 opened at the lower front of the water tank 4 in the direction shown by the arrows 59, 61, 62 and 64. Can be blown into the drum.

  The second fan 56 has a higher rotational speed of the fan motor or a larger fan diameter, for example, so that high-pressure air can be blown compared to the first fan 18. Furthermore, by making the area of the second blowing port 60 smaller than the first blowing port 23, the air blown from the second blowing port rather than the air blown from the first blowing port. The flow rate of the can be increased.

  Since the second fan 56 rotates at a high speed, a sound having a higher frequency than that of the first fan is generated. However, since the second fan 56 is provided below the water tank 4, the first fan 18. Since the distance to the ear is far when the user is standing in front of the washing machine because it is closer to the bottom, the noise level is low. Further, by providing the silencer 55 in the second air passage 51, the material and thickness of the soundproofing material are selected so as to have a particularly noise reduction effect with respect to the frequency generated by the second fan 56 rotating at high speed. As a result, the second fan 56 rotates at a higher speed than the first fan 18, but the noise can be reduced.

  An overflow port 65 is provided in a part of the water tank 4 and is connected to an overflow pipe 66. As shown in FIGS. 4 and 7, the overflow port 65 has an upper surface that is open to match the maximum water level 67 during washing, and water that exceeds the maximum water level 67 drains through the overflow pipe 66 in the direction of arrow 68. Then, it is discharged outside the washing and drying machine. The air duct 70 is provided in an arc shape along the opening 6 of the water tank 4, and connects the direction changing portion 58 and the second blowing port 60.

  FIG. 6 shows a state in which the water 72 reaches the maximum water level 67 in the washing process or the rinsing process, and the upper end of the waterproof wall 69 is disposed at a position higher than the maximum water level 67 in the direction changing portion 58. When washing water is further supplied into the water tank 4, the water is drained from the overflow port 65 through the overflow pipe 66, so that the maximum water level 67 is not exceeded, and the washing water 72 does not enter the air duct 70. Although entering, it is preferable because it does not flow over the waterproof wall 69 and flow into the second fan 56 from the direction changing portion 58 via the connecting pipe 57. Furthermore, if the water tank 4 is inclined and arranged so that the opening 6 is higher than the bottom surface opposite to the opening 6, the height of the second outlet 60 is increased by the amount of inclination of the water tank. It becomes convenient because it becomes difficult for water to enter.

  The outline of the movement of the clothes 14 in the drying process inside the rotary drum 5 will be described with reference to FIG. A plurality of baffles 71, which are protrusions, are provided inside the cylindrical surface of the rotating drum 5. When the rotating drum 5 rotates (shown in the state of rotating clockwise in FIG. 5), clothing is scraped up by the baffle 71 as indicated by an arrow 73, and then falls to the bottom surface of the rotating drum 5 by its own weight. It is stirred again by repeating the action of being picked up again by the baffle 71 and dropped, and the evaporation of moisture from the clothes is promoted by blowing warm air between the clothes. At this time, the first blowing port 23 provided near the upper side of the opening 6 is exhausted from the first exhaust port 12, dehumidified by the dehumidifying duct 13 through the drying means 11, and then heated by the heater 21. The warm air is blown.

  On the other hand, there is a second air inlet 60 in the vicinity of the bottom surface of the rotary drum 5, and the air exhausted from the second air outlet 52 and pressurized by the second fan 56 through the second air passage 51. Is blown upward into the rotary drum 5. This air is blown up relative to the clothing 14 falling after being swung up by the baffle 71 and is blown upward from the lower side of the opening, so that the clothing 14 can be seen from the very vicinity of the falling clothing. Will be sprayed directly on. Therefore, if the garment is light, the garment in the middle of falling will be lifted and stirred again, or even if it is not enough to lift the garment, it will hinder the fall of the garment. For example, the wrinkles of the garment 14 are stretched due to the spreading of the wind and the like. Furthermore, since high-speed wind flows on the surface of the clothes, the evaporation of moisture is promoted, so that the drying time can be shortened. Furthermore, since the dry air blown into the rotary drum by the first air passage and the second air passage has an air volume that is higher than that of the washing / drying machine having only the first air passage, evaporation of moisture from the clothing is prevented. Further, it is promoted and has an effect of shortening the drying time.

  As described above, the air blown into the rotary drum 5 from the second blow opening 60 is used to lift or stir the clothes 14 by the first blow duct 11 serving as a drying means. It is desirable that the pressure is higher than that of the air blown from the mouth 23 and has a higher pressure. This is advantageous because the garment 14 is further agitated by directly blowing the high-speed and high-pressure air blown from the second blowing port onto the garment 14.

  On the other hand, unlike the present embodiment, an example of another configuration in which the position of the air blowing port into the rotating drum 5 is different and the air is blown not from the front but from the back of the rotating drum 5 (facing the opening) will be described with reference to FIG. Then, the rotary drum 5 is supported on the outer periphery of a drum flange 75 (shown in the case of a spoke shape divided into three in FIG. 5) attached to a drive motor shaft 78 that is a rotation shaft of the drive motor 8. . A mesh-shaped opening mesh 76 is provided in a gap range where the drum flange 75 is not provided on the back surface of the rotating drum 5, preventing the clothes 14 from protruding from the rotating drum 5 and allowing air to flow from the outside of the rotating drum 5. It is configured to be able to pass inside. A back blowing port 77 is provided on the bottom surface of the water tank 4 facing the opening mesh 76, and high pressure air is sent by an air passage (not shown) and blown from the back blowing port 77 and is provided on the back surface of the rotating drum 5. It passes through the mesh and is blown into the rotary drum 5. In the case of such a configuration, the drum flange 75 covers the back blowing port 77 three times in one rotation in accordance with the rotation of the rotating drum 5 during the drying process. Since the air cannot be blown into the air, air is blown into the rotary drum 5 only intermittently. Furthermore, since the opening mesh 76 has a mesh shape, the air resistance is large, the air pressure is reduced, and the air is diffused by the mesh, so that the pressure and flow velocity of the air hitting the garment 14 are lowered. That is, the air that hits the garment 14 is air that has passed through the opening mesh 76 and does not directly hit the garment 14.

  Further, since the warm air is blown out from the back side of the rotating drum toward the near side, the warm air is blown toward the transparent door glass provided on the rotating drum 5 side of the front lid 7. By the time the warm air hits the door glass, the moisture from the clothes evaporates to become a hot air with high humidity. On the other hand, the door glass is cooled by the outside air, so that the moisture is inside the rotary drum 5 side of the door glass. Condensation is likely to cloud and the inside clothing is difficult to see.

  In the embodiment, since the second blowing port 60 opens at the front lower part of the rotating drum 5, even if the rotating drum 5 rotates in the drying process, the second blowing port 60 extends in the direction of the arrow 64 from the second blowing port 60. Since the high-pressure air that is blown out is continuously blown directly onto the garment 14, the effect of blowing up the garment 14 is continuous, and the pressure and flow rate are not lowered, which is more convenient.

  Furthermore, since the first blowing port 23 and the second blowing port 60 are provided in the vicinity of the door glass provided on the lid 7, the warm air blown from these blowing ports is low in humidity. It is preferable because the door glass is not easily fogged.

  Moreover, the space between the water tank 4 and the washing / drying machine main body 1 is effectively used by separately providing the first air path in the upper part of the water tank 4 and the second air path in the lower part of the water tank 4. Miniaturization can be realized. That is, when the first air path and the second air path are both concentrated on the upper or lower part of the water tank, there is a space necessary for mounting the two air paths on the upper or lower part of the water tank 4. There is a problem that the size of the washing / drying machine main body 1 is increased and the size thereof is increased.

  As shown in FIG. 7, when the water 72 is supplied to a position higher than the second blowing port 60 in the washing process or the rinsing process, the water 72 enters the inside of the air duct 70, and then the washing or rinsing process is performed. Even after the completion and drainage from the water tank 4, the water remains without being drained from the region lower than the second blowing port 60 as shown in FIG. 8. In the dehydration process after the rinsing process, the rotary drum 5 is rotated at a high speed to remove moisture contained in the clothes by centrifugal force. The second fan motor 63 is driven before the dehydration process is started. As a result, high pressure air is blown into the air duct 70 through the connecting pipe 57 as indicated by an arrow 74, so that the water 72 remaining in the air duct 70 is discharged from the second air inlet 60 into the water tank 4. It can be pushed inside and drained. By draining the water inside the air duct 70 immediately before the start of the dehydration process, the water remaining in the air path 70 is wetted by the clothes in the drying process after the dehydration process and is dried. It is convenient because it can prevent the time from becoming long.

  FIG. 8 is a diagram showing the configuration of still another embodiment. The difference from FIG. 4 is that the direction changing portion 58 is not provided, and the opening 6 is located at a position where the second blowing port 60 is higher than the maximum water level 67. This is a configuration in which air is blown into the inside of the rotating drum 5 in the direction indicated by the arrow 64. If it is such a structure, since the 2nd blowing inlet 60 exists in a position higher than the maximum water level 67, water does not flow in into the water tank 4. FIG.

  FIG. 9 is a block diagram showing the configuration of the control system.

  The operation panel 11 is provided with various displays and various switches including a power source, and these are connected to the operation circuit unit 94. The switch selects execution of each process of washing, rinsing, dehydration, and drying, and each indicator displays the amount of detergent, the amount of water, or the time, progress, and abnormality of each process.

  FIG. 9 shows a control circuit section mainly composed of a microcomputer 100 (hereinafter referred to as a microcomputer) provided on the main control board 40. This functions as a control means for controlling the overall operation of the washing machine. The microcomputer 100 receives operation signals from various switches including the power switch of the operation panel 11. Then, the operation setting value corresponding to the user's operation signal, the amount of necessary detergent, the amount of water, or the time, progress state, abnormality, etc. of various processes are output to the respective displays or buzzers.

  The power supply circuit 95 directly rectifies and smoothes the commercial power supply, and supplies the DC power necessary for the microcomputer 100 and other circuits. For this reason, the DC power supply of the microcomputer 100 and other circuits is superimposed on the commercial AC power supply.

  The microcomputer 100 controls each motor-operated valve and each motor based on these input signals and a previously stored control program. The microcomputer 100 controls the heating or opening / closing of the valve by supplying a commercial power source to the PTC heater 36, the main water supply valve 93, the softener water supply valve 89, the dehumidified water water supply valve 88, and the drain valve 86 through each control circuit 96. The microcomputer 100 controls the rotational speeds of the first fan motor 53 and the second fan motor 63 via the fan motor control circuit 98 to vary the air volume. Further, the microcomputer 100 controls the rotation direction and the number of rotations of a drive motor (brushless motor) 8 that rotationally drives the drum 12 via a motor drive circuit 99. When the rotational load torque of the drive motor 8 increases, the motor drive circuit 99 increases the applied current to increase the drive torque, and when the rotational load torque decreases, the motor drive circuit 99 decreases the applied current to decrease the drive torque. Control to keep the rotation speed constant. By detecting the current applied to the drive motor 8 in the motor drive circuit 99, it is possible to determine the magnitude of the load torque applied to the drive motor 8, and to detect the amount of cloth put into the drum. The detergent amount calculation unit 101 calculates a detergent amount necessary for washing based on the detected cloth amount.

  The temperature sensor 97 and the humidity sensor 90 detect the temperature and humidity of hot air used for drying clothes and send it to the main control board 40. The comparison unit 102 compares the measurement values obtained by the temperature sensor 97 and the humidity sensor 90 with a preset reference value 103 and outputs the magnitude of the reference value 103 to the microcomputer 100.

  Next, the operation of this embodiment will be described.

  First, an outline process of washing and drying in the washing / drying machine will be described. FIG. 10 shows a schematic flowchart of the standard course of the washer / dryer. First, when the user turns on the power switch and the operation of the standard course is started, washing of the laundry, two intermediate dehydrations and rinsing, final dehydration, and drying are sequentially performed. First, the amount of laundry is detected (step S1), and then the user puts in detergent (step S20). After supplying the necessary tap water (step S2), washing (step S3) is performed and the washing water is drained (step S4). Thereafter, in order to squeeze out the detergent contained in the laundry, first intermediate dehydration is performed (step S5), and water supply is started again for the first rinse (step S6). When the first rinse (step S7) is completed, the rinse water is drained (step S8). Thereafter, in order to squeeze out the detergent still contained in the laundry, a second intermediate dehydration (step S9) is performed, and water supply is started again for the second rinse (step S10). When the second rinsing (step S11) is completed, the rinsing water is drained (step S12), and then the second fan motor 63 is driven to perform high-pressure air blowing 1 for a short time (step S130). As shown, after the water remaining in the air duct 70 is drained into the rotary drum, the final dehydration (step S13) is performed.

  Finally, drying (step S14) is performed. After entering the drying process, the second fan motor 63 is operated to perform high-pressure air blowing (step S15), and washing and drying are completed.

  According to the present embodiment, during the drying process, the air volume is increased by blowing dry air into the rotary drum from the first air path and the second air path to promote the evaporation of moisture from the clothing. In addition to shortening the drying time, in the second air path, the clothing is lifted by blowing high-pressure air directly onto the clothing in the rotating drum at high speed from the blowing port provided at the bottom of the opening of the rotating drum. Stirring while stirring has the effect of extending the wrinkle of the clothes and improving the dry finish.

The partial cut perspective view which shows the whole drum type washing-drying machine by this invention, and an internal structure. The rear view of the drum type washing-drying machine by this invention. The right view of the drum type washing-drying machine by this invention. Sectional drawing which shows the structure of the 2nd blowing inlet of the drum type washing-drying machine by this invention. Sectional drawing which shows the structure of the 2nd blowing inlet of the drum type washing-drying machine by this invention, and the structure of a rotating drum bottom face. Sectional drawing which shows the structure of the 2nd blowing inlet of the drum type washing-drying machine by this invention. Sectional drawing which shows the structure of the 2nd blowing inlet of the drum type washing-drying machine by this invention. Sectional drawing which shows another Example of the drum type washing-drying machine by this invention. The block diagram which shows the structure of the control system of the drum type washing-drying machine by this invention. The flowchart explaining operation | movement of the drum type washing-drying machine by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing-dryer main body 2 Suspension 3 Base 4 Water tank 5 Drum 6 Opening part 7 Lid 8 Drive motor 9 Bellows 10 Detergent introduction part 11 Drying means (1st air path)
12 First exhaust port 13 Dehumidification duct 14 Clothing 15 Bellows 16 Filter 18 First fan 20 First fan motor 21 Heater 22 Blow duct 23 First blow port 24 Connection air passage 25 Blow bellows 51 Second Air duct 52 Second exhaust port 53 Exhaust duct 54 Connection pipe 55 Silencing means 56 Second fan 57 Connection pipe 58 Direction changing part 60 Second blowing port 63 Second fan motor 65 Overflow port 66 Overflow tube 67 Maximum Water level 69 Waterproof wall 70 Air duct 71 Baffle 72 Water 75 Drum flange 76 Opening mesh 77 Rear outlet 78 Drive motor shaft

Claims (6)

A cylindrical water tank that is horizontally or inclined and elastically supported with one end as an open end and the other end as a bottom face, and a cylindrical and one end that is rotatably supported concentrically with the water tank inside the water tank. A rotating drum as an end, a lid provided at the opening end of the water tank and the rotating drum, a motor for rotationally driving the rotating drum, and a first air inlet opening at the opening end of the water tank And a second blowing port that opens at the open end of the water tank and below the opening,
The area of the second blowing port is smaller than the first blowing port,
A drum-type washing and drying machine characterized in that the flow rate of air blown upward from the second blowing port is higher than air blown from the first blowing port . 2. The drum type according to claim 1, further comprising a first blower fan that blows air to the first blowing port and a second blower fan that blows air to the second blowing port. Washing dryer . The drum-type washing / drying machine according to claim 2, wherein the second blower fan is connected to the second blowing port via a position higher than the overflow port of the water tank . The drum type washing and drying machine according to claim 2, wherein the first blower fan is provided above the water tank, and the second blower fan is provided below the water tank . An air passage connecting the second blower fan and the second blowing port is provided, and the second blowing port is provided so as to blow air into the water tank from the vicinity of the lower end of the opening of the water tank. The water tank is provided with an overflow port at the set maximum water level, and when the water level in the water tank rises above the height of the overflow port, the water in the water tank is drained from the overflow port. The air passage connected to the second blower fan is turned upward once through a position higher than the overflow port, and turned downward to change the direction. The drum type washing and drying machine according to claim 2, wherein the drum type washing and drying machine is connected to a second blowing port provided near a lower end of the opening of the water tank toward a lower end of the water tank . Immediately before starting the dehydration step, the second blower fan is driven, and the water accumulated in the second air passage connected to the second blowing port is discharged from the second blowing port to the water tank. 6. The drum type washing and drying machine according to claim 5, wherein the drum type washing and drying machine is drained inside .

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