JP2014014529A - Drum type dryer - Google Patents

Abstract

The present invention provides a drum-type dryer that blows air appropriately in accordance with the progress of drying of clothes to improve drying finish and reduce power consumption.
SOLUTION: An outer tub 20 whose inside becomes a drying chamber during a drying operation, a rotating drum 29 rotatably disposed in the outer tub 20 and housing a garment 30, and a motor 36 for driving the rotating drum 29 are provided. And a drying device 6 having a blowing port 11 for blowing warm air to the rotating drum 29, a heating means 62, and a blowing means 61, and a drum for blowing dry air 12 while rotating the rotating drum 29 during drying. In the type dryer, the wind direction sprayed on the garment 30 is moved upward as the drying time elapses.
[Selection] Figure 2

Description

The present invention relates to a drum dryer having means for drying clothes.

  Drying of clothes with a dryer that can perform the drying process or a washing and drying machine that can continuously perform the process from the washing process to the drying process creates high-temperature and low-humidity air with a blower fan and a heat source (heater), which is then used as a rotating drum (washing) This is done by blowing into the tank), raising the temperature of the clothing, evaporating the moisture from the clothing, dehumidifying the evaporated moisture and discharging it to the outside of the machine.

  In Patent Document 1, the wind direction is continuously changed by changing the inclination angle of the wind direction plates arranged in the plurality of air inlets, and the clothes stored in the drum are dried uniformly and in a short time. A dryer for shortening is described.

JP 2011-239990 A

  Specifically, in the dryer described in Patent Document 1, the wind direction is changed as follows. That is, the wind direction is continuously changed up and down in the initial drying stage, the wind direction is maintained upward in the middle drying stage, the wind direction is maintained downward in the final drying stage, and the wind direction is continued up and down again in the finishing and cooling stages. Is changing. However, such a wind application method is not suitable for the degree of drying of the clothes, and is not sufficient in terms of drying finish and drying efficiency.

  For example, in the initial drying stage and the intermediate drying stage, clothes that are not dry accumulate in the lower part, so that even if an upward wind is blown, the clothes are not effectively hit. Further, in the final drying stage, the finishing stage, and the cooling stage, there are many garments that have become lighter and lighter in the upper part. Therefore, even if a downward wind is blown, the garments are not effectively hit.

  An object of the present invention is to provide a drum-type dryer in which air is blown appropriately in accordance with the progress of drying of clothing to improve drying finish and reduce power consumption.

  In order to achieve the above object, the present invention provides an outer tub whose inside is a drying chamber during a drying operation, a rotating drum that is rotatably arranged in the outer tub, and stores clothes, and drives the rotating drum. In a drum type dryer that includes a motor for rotating the rotating drum, a blowing path for blowing warm air to the rotating drum, a heating device, and a drying device having a blowing device, and blows air while rotating the rotating drum during drying. The direction of the wind blowing on the clothing was moved upward as time passed.

  According to the present invention, it is possible to provide a drum-type dryer in which wind is appropriately blown in accordance with the progress of drying of clothing, and improvement in drying finish and reduction in power consumption are realized.

1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention. It is right side sectional drawing of the washing-drying machine which concerns on the 1st Embodiment of this invention, and shows the first half of a drying process. The front view of the outer tank cover which provided the warm air blowing outlet which concerns on the 1st Embodiment of this invention is shown. It is right side sectional drawing of the washing-drying machine which concerns on the 1st Embodiment of this invention, and shows the middle stage of a drying process. It is right side sectional drawing of the washing-drying machine which concerns on the 1st Embodiment of this invention, and shows the second half of a drying process. It is right side sectional drawing of the washing-drying machine which concerns on the 1st Embodiment of this invention, and shows the completion | finish process of a drying process. It is right side sectional drawing of the washing-drying machine which concerns on the 2nd Embodiment of this invention, and shows the first half of a drying process. It is right side sectional drawing of the washing-drying machine which concerns on the 2nd Embodiment of this invention, and shows the second half of a drying process.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.

FIG. 1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention.
The casing of the washing and drying machine according to the first embodiment includes a base 1 and an outer frame 2 configured by combining a steel plate and a resin molded product placed on the top of the base 1. A door 3 and a front cover 22 for taking clothes 30 (see FIG. 2) in and out are provided on the front surface of the outer frame 2, and a back cover 23 is provided on the back surface of the outer frame 2.
2 and 4 to 6 are right side cross-sectional views of the washing and drying machine according to the first embodiment, FIG. 2 shows the first half of the drying process, FIG. 4 shows the middle stage of the drying process, and FIG. The latter half of the drying process is shown, and FIG. 6 shows the end process of the drying process. FIG. 3 shows a front view of the outer tub cover 20a provided with the hot air outlet 11. First, the internal structure of the washing / drying machine according to the first embodiment will be described with reference to FIG.

  The rotary drum 29 is rotatably supported, has a large number of through holes for water flow and ventilation on its outer peripheral wall and bottom wall, and an opening for taking clothes in and out on the front end face. . The door 3 is opened by the user of the washing and drying machine, and the clothes 30 are put into the rotary drum 29. A fluid balancer 31 integrated with the rotary drum 29 is provided outside the opening. A plurality of lifters 33 extending in the axial direction are provided inside the outer peripheral wall. When the rotating drum 29 is rotated during washing and drying, the clothes are lifted along the outer peripheral wall by the lifter 33 and centrifugal force, and dropped by gravity. The tumbling operation is repeated. The rotation center axis of the rotary drum 29 is inclined about 0 to 30 ° with respect to the horizontal so that the horizontal or opening side is higher.

  The cylindrical outer tub 20 includes a rotating drum 29 coaxially, the front surface is open, and a drum driving motor 36 is provided at the outer center of the rear end surface. The main shaft 35 of the drum driving motor 36 passes through the outer tub 20 and is coupled to the rotating drum 29 via the rotating drum metal flange 34. Note that the rotation speed of the drum driving motor 36 is controlled by the control device 100.

  A rubber packing 38 made of an elastic body is attached to the opening of the outer tub 20. The packing 38 plays a role of maintaining the water tightness between the inside of the outer tub 20 and the door 3. Thereby, prevention of the water leak at the time of a washing process, a rinse process, and a dehydration process is aimed at. The outer tub 20 functions as a drying chamber during the drying process of the washing / drying machine.

  A drain hole 37 is provided at the bottom bottom of the outer tub 20 and is connected to the drain hose 9. The drain hose 9 is connected to a drain port 39 having a drain trap 10 provided on the floor surface.

  A drainage valve 8 is provided between the drainage hole 37 and the drainage hose 9. By closing the drainage valve 8 and supplying water, water is accumulated in the outer tub 20, and the drainage valve 8 is opened to open the inside of the outer tub 20. Of water can be discharged out of the machine. The drain valve 8 is controlled to be opened and closed by the control device 100.

  The outer tub 20 is supported in an anti-vibration manner by a suspension 21 whose lower side is fixed to the base 1.

  The washing / drying machine according to the first embodiment includes a dehumidifying duct 5, a drying device 6 including a fan 61 serving as a blowing means and a heater 62 serving as a heating means, and dries the clothes 30 in the rotary drum 29 during the drying process. . Note that the rotation speed of the fan 61 and ON / OFF of the heater 62 are controlled by the control device 100.

  The dehumidifying duct 5 is installed vertically inside the back surface of the outer frame 2, and the lower part of the duct is connected substantially horizontally to the ventilation port 32 provided below the back surface of the outer tub 20 with a bellows 4 having a flexible structure. The dehumidifying duct 5 incorporates a water-cooled dehumidifying mechanism (not shown) that allows the cooling water 52 to flow from the cooling water supply pipe 51 by opening a cooling water valve (not shown). The cooling water valve is controlled to be opened and closed by the control device 100. Cooling water 52 and dew condensation water (water dehumidified from the air by the water cooling and dehumidifying mechanism) flow down along the wall surface of the dehumidifying duct 5 and enter the outer tub 20 through the vent 32 and pass through the drain hose 9 from the drain hole 37 and out of the machine. Is discharged.

  The outlet of the dehumidifying duct 5 is connected to the intake port of the fan 61, and the discharge port of the fan 61 is connected to the heater 62. The outlet of the heater 62 is connected to the blowout port 11 through which the dry air 12 for drying the clothes 30 is blown toward the inside of the rotary drum 29 through the flexible bellows 7.

  The blowout port 11 incorporates a movable nozzle 11a. The movable nozzle 11a drives a control motor 17 (see FIG. 3), and the angle can be changed with the pivot 17b as a fulcrum via the gear 17a. The blowing direction of the dry air 12 can be arbitrarily changed by changing the angle of the movable nozzle 11a. The control motor 17 is controlled by the control device 100. Moreover, the blower outlet 11 is provided along the opening part 2c from the front side of the outer tank cover 2d, and the flow paths 11b and 11c are formed in the inside. A bellows joint 7 is attached to the inlet of the outlet 11, and a slit-like outlet 11d is formed at the outlet of the flow path 11c. The movable nozzle 11a of the outlet 11 is formed so as to jump out from the inner peripheral surface of the opening 2c, and the outlet 11d opens toward the inside of the rotary drum 29. By doing in this way, the warm air which came out of the exit part 11d can be directly applied to the clothing in the rotating drum 29.

  Note that if the amount of protrusion of the movable nozzle 11a is too large, the movement of the clothing is hindered during washing or drying. Therefore, as shown in FIG. 3, the outlet portion 11d is formed into a flat slit shape to reduce the amount of protrusion, and the opening 2c. The surface shape of the movable nozzle 11a changes smoothly. Further, the flow path 11b and the flow path 11c are configured so that there is no useless protrusion or a sudden change in the flow direction, and the flow path area gradually decreases toward the outlet portion 11d. By doing so, it is possible to reduce pressure loss and fluid noise that occur when high-speed wind flows through the channels 11b and 11c. Moreover, it becomes possible to spray directly on the garment 30 while keeping the high speed wind without increasing the wind speed at the exit portion 11d, and the evaporation amount of moisture from the garment 30 is promoted to improve the drying performance. Here, since only one outlet 11 including the movable nozzle 11a is provided on the front side of the rotary drum 29, the air volume is not dispersed and the wind speed does not decrease, so that the drying finish of the clothes can be maintained high.

  An intake valve 13 is provided between the outlet of the dehumidifying duct 5 and the intake port of the fan 61. As shown in FIGS. 2 and 4, the circulating air 14 from the dehumidifying duct 5 is sucked into the fan 61 by closing the intake valve 13. Further, as shown in FIG. 5, by opening the intake valve 13, the flow path from the dehumidification duct 5 to the fan 61 is closed, and the housing internal air 15 is sucked into the fan 61. The intake valve 13 is controlled to be opened and closed by the control device 100.

  Temperature sensors (not shown) are provided at the drain hole 37, the intake port of the fan 61, and the discharge port of the fan 61, and values detected by each temperature sensor are transmitted to the control device 100.

  In the washing and drying machine according to the first embodiment configured as described above, in the washing process, the clothes 30 is put into the rotary drum 29, and water is supplied with the drain valve 8 closed, and the washing water is supplied to the outer tub 20. The clothes 30 are washed by rotating the rotary drum 29.

  In the dehydration step, the drain valve 8 is opened to drain the washing water in the outer tub 20, and the rotating drum 29 is rotated to centrifugally dehydrate the clothes 30.

  Hereinafter, each stage of the drying process of the washing dryer according to the first embodiment will be described with reference to FIGS.

  <Drying Step: First Half> In the first half of the drying step, as shown in FIG. 2, the control device 100 of the washing and drying machine according to the first embodiment opens the drain valve 8 and rotates the rotary drum 29. At the same time, the fan 61 is driven and the heater 62 is energized.

  The control device 100 controls the drum driving motor 36 so that the clothing 30 in the rotary drum 29 performs a tumbling operation.

  As a result, the air in the outer tub 20 is sucked from the air vent 32 and passes through the dehumidifying duct 5, and then heated by the heater 62 and blown from the air outlet 11 toward the clothing 30 in the rotary drum 29. Is generated.

Immediately after the start of the drying process, the garment 30 accumulates in the lower side of the rotary drum 29 because of its high water content. The angle of the movable nozzle 11a is directed downward so that the dry air 12 is directly blown onto the clothing 30. Thereby, the temperature of the clothing 30 rises quickly and the drying time is shortened.
Moreover, the temperature of the clothing 30 in the rotating drum 29 is not high immediately after the start of the drying process. Therefore, the amount of evaporation from the garment 30 is not so much. In addition, the water-cooled dehumidifying mechanism dehumidifies the condensed moisture by cooling the hot and humid air using the change in the saturated water vapor amount due to the temperature difference. For this reason, in the first half of the drying process, the cooling water valve is not opened, and the cooling water does not flow from the cooling water supply pipe 51 into the dehumidifying duct 5.

  This saves cooling water in the first half of the drying process with low dehumidification performance, and in addition, the temperature of the circulating air 14 sucked into the fan 61 is not lowered by the cooling water, so the circulating air 14 is reheated by the heater 62, The time required to raise the temperature of the dry air 12 and the clothing 30 which blows out from the blower outlet 11 is shortened.

  <Drying Process: Middle Stage> In the middle stage of the drying process, as shown in FIG. 4, the control device 100 rotates the rotating drum 29 and operates the fan 61 to drive the heater 62 as in the first half of the drying process. Energize. In addition, the control device 100 opens a cooling water valve (not shown) and allows the cooling water 52 to flow from the cooling water supply pipe 51.

  As a result, the air in the outer tub 20 is sucked out from the air vent 32, passed through the dehumidifying duct 5, water-cooled and dehumidified, heated by the heater 62, and blown from the outlet 11 toward the clothing 30 in the rotary drum 29. High temperature and low humidity dry air 12 is generated.

  Here, the moisture content of the garment 30 gradually decreases in the first half of the drying process and in the middle of the drying process. When the garment capacity is 6 kg, the garment 30 gradually spreads to the vicinity of the center in the rotary drum 29. Along with this, the angle of the movable nozzle 11a is moved upward, and the dry air 12 of high-speed wind is blown onto the clothes 30 that are lifted along the outer peripheral wall by the lifter 33 and centrifugal force and spread by gravity. Thereby, since the area which hits the drying air 12 blown out from the movable nozzle 11a and the clothing 30 is expanded, the evaporation amount of moisture from the clothing 30 is promoted, and the drying performance is improved.

  <Drying Process: Second Half> In the second half of the drying process, as shown in FIG. 5, the control device 100 turns off the heater 62, closes the cooling water valve, and stops the cooling water 52. Then, the intake valve 13 is opened.

  As a result, the external air 16 sucked from the gap at the bottom of the base 1 is warmed by the exhaust heat of the outer tub 20, the drum driving motor 36, and the fan 61 while flowing through the side surface of the outer tub 20, and the middle of the drying process. The air is sucked into the fan 61 together with the high-temperature housing internal air 15 accumulated in the space between the upper surface of the outer tub 20 and the outer frame 2.

  The sucked internal air 15 is blown to the garment 30 as high-temperature and low-humidity dry air 12 that blows toward the garment 30 in the rotary drum 29 from the blowout port 11, deprives the garment 30 of moisture and moistens it. The drainage hole 37 passes through the drainage hose 9, breaks the water seal of the drainage trap 10, and is discharged to the drainage port 39. Thereby, the moisture from the clothing 30 is exhausted and dehumidified.

  In the latter half of the drying process, since the clothes 30 are sufficiently warmed and the water is evaporated, the power consumption is reduced by stopping the heater heating and performing exhaust dehumidification.

  In the case of a general drain trap, since the height of the water seal is about 50 to 80 mm, the pressure on the drain hose 9 side needs to be about 1000 Pa or more to break the water seal. Moreover, in order to suppress the odor from the drain port 39, it is necessary to ensure a high pressure (pressure higher than a predetermined pressure) even after the water seal is broken, and during the exhaust type drying by the drain hose 9 side (in the first embodiment In the second half of the exhaust process, the fan 61 is controlled to maintain a high pressure.

  Here, in the latter half of the drying process, the moisture content of the garment 30 further decreases, and when the garment capacity is 6 kg, the garment 30 gradually spreads to the vicinity of the upper part in the rotary drum 29. Along with this, the angle of the movable nozzle 11a is further moved upward, and the dry air 12 of high-speed wind is blown to the clothes 30 which are lifted along the outer peripheral wall by the lifter 33 and centrifugal force and spread by gravity. Thereby, since the area which hits the drying air 12 blown out from the movable nozzle 11a and the clothing 30 is expanded, the evaporation amount of moisture from the clothing 30 is promoted, and the drying performance is improved.

  <Drying Process: Ending Process: Water Trap Regeneration Process> FIG. 6 is a right side sectional view of the washing / drying machine according to the first embodiment, and shows the end process of the drying process.

  After the drying, as shown in FIG. 6, the rotation speed of the fan 61 is lowered to a pressure level that does not break the water seal while keeping the pressure on the drainage hose 9 side higher than the pressure on the drainage port 39 side. (Not shown) is opened, cooling water 52 is allowed to flow from the cooling water supply pipe 51, the water sealing of the drain trap 10 is recovered, and the drying process is completed.

  In this way, after the drying is completed, the drain trap 10 is provided while suppressing the odor from the drain port 39 by supplying water to the drain port 39 through the drain hose 9 while maintaining the pressure on the drain hose 9 side at a predetermined level or more. The water seal can be restored.

  <Summary> In the washing and drying machine configured as described above, the area of contact between the dry air 12 and the garment 30 is increased by spraying the high-speed dry air 12 in the vicinity where the garment 30 always expands as the drying progresses. As a result, the evaporation amount of water is promoted and the drying performance is improved. Thereby, power consumption can be reduced and drying time can be shortened. In addition, by blowing high-speed wind in the vicinity where the garment 30 always expands, the wrinkles of the garment 30 are stretched and the finish is improved. The angle of the movable nozzle 11a is controlled based on the initial weight of the garment 30, the elapse of the drying time, and the values of the temperature sensors (the drain hole 37, the intake port of the fan 61, and the discharge port of the fan 61). The drying state is judged, and the angle of the movable nozzle 11a is gradually moved from the lower side to the upper side according to the drying state.

  Furthermore, by the middle of the drying process, the heat stored in the clothing 30, the rotating drum 29, the outer tub 20, the upper surface of the outer tub 20, the housing internal air 15 stored in the space of the outer frame 2, and the dry external air 16 are stored. The residual heat drying using can reduce the power consumption of the heater 62 in the latter half of the drying process.

Here, in order to improve the drying performance, high-speed dry air 12 is blown to the clothes 30 that are lifted along the outer peripheral wall by the lifter 33 and centrifugal force and dropped by gravity, thereby promoting the evaporation of moisture. Requires an air volume of 0.8 m ³ / min or more and a wind speed of 50 m / s or more. In this embodiment, the area of the exit portion 11d of the movable nozzle 11a is 250 mm 2 (on a slit having a width of 50 × a height of 5 mm), the impeller diameter of the fan 61 is 140 mm, the blade thickness is 7 mm, and the rotational speed is 13500 revolutions per minute. I'm driving. As a result, the fan discharge pressure is about 6500 Pa, and a wind speed of about 93 m / s is obtained at a flow rate of about 1.4 m ³ / min. In the present embodiment, since the movable nozzle 11a is employed, unlike the case where a wind direction plate is simply provided at the outlet of the outlet 11, there is little windage loss and it is difficult for the wind speed distribution to be widened. It is suitable for taking out.

Further, under the conditions of 6 kg of clothing, heater input of about 600 W, air volume of about 1.5 m ³ / min, and cooling water volume of 0.3 to 0.5 L / min, the heater 62 is turned off in the latter half of the drying process, and the intake valve 13 is turned off. Exhaust drying that opens and blows the external air 16 taken from the intake valve 13 onto the garment 30 reduces approximately 10 to 20% of the total power consumption in the drying process compared to the case where no exhaust drying is performed. Can do.

  Furthermore, when the housing internal air 15 sucked into the fan 61 is heated by exhaust heat from the outer tub 20, the drum driving motor 36, the fan 61, etc. (residual heat drying), or when the external air 16 is directly sucked In comparison, about 5% of the total power consumption of the drying process can be reduced.

  Moreover, since the moisture of the clothes 30 is discharged from the drainage hose 9 to the drainage port 39 even if the external air 16 is sucked, the power consumption can be reduced without deteriorating the indoor environment in which the washer / dryer according to the first embodiment is installed. Can be reduced. Further, since the water sealing of the drain trap 10 is recovered while maintaining the internal pressure on the drain hose 9 side at the end of drying, the odor from the drain port 39 does not leak into the room and deteriorate the environment.

  <Modification> The washing and drying machine according to the first embodiment is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention.

  For example, in the configuration of the above embodiment, the intake valve 13 is opened, and the exhaust air is dried by blowing the external air 16 taken from the intake valve 13 onto the clothing 30. As shown in FIG. 7 as the second embodiment. Furthermore, the intake valve 13 is not provided, and in the first half of the drying process, the cooling water valve is not opened and the cooling water is not allowed to flow from the cooling water supply pipe 51 into the dehumidifying duct 5 as in the first embodiment. Then, in the latter half of the drying process, as shown in FIG. 8, a cooling water valve (not shown) is opened, and the water evaporated from the clothing 30 is dehumidified by flowing the cooling water 52 from the cooling water supply pipe 51. The clothes 30 are dried by discharging to the outside of the machine.

  The washing / drying machine configured as described above can simplify the structure by eliminating the intake valve 13 although the effect of reducing the power consumption by exhaust drying of the first embodiment cannot be obtained. Moreover, in the structure of the said 1st Embodiment, although a cooling water valve is opened and the water cooling dehumidification is performed in the middle part of a drying process, it is not necessary to use a cooling water for a drying process. In this case, since the temperature of the dry air 12 rises and the temperature of the clothing 30 rises, the heat capacity used at the time of residual heat drying increases, and the power consumption of the drying process can be further reduced. In addition, when not using water cooling dehumidification by cooling water, the inner wall surfaces, such as the dehumidification duct 5 and the outer tank 20, become a dehumidifier by air cooling.

  In the present embodiment, the direction of the wind blown into the rotary drum 29 from the blowout port 11 is gradually changed from downward to upward as the drying proceeds, but the specific control of the wind direction is not limited thereto. Absent. For example, even if the wind is blown repeatedly so as to repeat the reciprocation from downward to upward, it is conceivable that control is performed so that the upward ratio increases on a time average when the dryness is high.

  Furthermore, the washing and drying machine of the present embodiment changes the angle of the movable nozzle 11a in the middle of the drying process, blows dry air 12 onto the door 3 and the packing 38, and dries the surface before the clothes 30, thereby The adhesion of lint (cotton dust) generated from 30 can be reduced.

  Further, in the washing / drying machine according to the present embodiment, when drying an object of shape deformation, the rotary drum 29 is stopped and the clothes 30 are placed under the rotary drum 29, and the angle of the movable nozzle 11a is set to the lower side. By directly drying toward the surface, the evaporation amount of water is promoted and the drying performance is improved. Thereby, power consumption can be reduced and drying time can be shortened.

  In the present embodiment, the heater 62 is used as the heating unit. However, the present invention is not limited to this, and a heat pump may be used. In addition, the same effect can be obtained even when the present invention is applied to a dryer that performs only the drying process instead of the washing dryer.

1 Base (housing)
2 Outer frame (housing)
2c Opening 3 Door 4, 7 Bellows 5 Dehumidification duct 6 Drying device 8 Drain valve 9 Drain hose 10 Drain trap 11 Blowing port 11a Movable nozzle 12 Dry air 13 Intake valve 14, 15 Housing internal air 16 External air 20 Outer tank 20a Outer tank cover 21 Suspension 22 Front cover 23 Back cover 29 Rotating drum 30 Clothing 31 Fluid balancer 32 Ventilation port 33 Lifter 34 Rotating drum metal flange 35 Main shaft 36 Drum driving motor 37 Drain hole 38 Packing 39 Drain port 51 Cooling water supply Pipe 52 Cooling water 61 Fan (air blowing means)
62 Heater (heating means)
100 Control device

Claims (4)

  During the drying operation, an outer tub that becomes a drying chamber, a rotating drum that is rotatably arranged in the outer tub, stores clothes, a motor that drives the rotating drum, and blows warm air to the rotating drum A drum-type dryer that blows air while rotating the rotating drum during drying, and the wind direction that blows on the clothing increases with the passage of time of drying. A drum-type dryer characterized by being moved to   2. The outlet flow according to claim 1, wherein a hot air outlet is provided on the front side of the rotating drum, the hot air outlet is formed into a flat slit shape, and a flow passage area gradually decreases toward the slit shape. A drum dryer characterized by changing the angle of the road. The drum type according to claim 1 or 2, wherein, when drying, a wind having an air volume of 0.8 m ³ / min or more and a wind speed of 50 m / s or more is directly blown onto the clothes accommodated in the rotating drum. Dryer.   4. The drum dryer according to claim 1, wherein the direction of wind blown on the garment detects the dryness of the garment and the wind direction moves upward in accordance with the value of the dryness. 5. .