CN102465438B - Drying machine and laundry dryer - Google Patents

Abstract

The present invention provides a dryer and a washer-dryer capable of preventing uneven drying of clothes, taking into account differences in drying methods, suppressing moisture-laden air from being discharged to the outside of the machine as much as possible, and reducing power consumption. The drying machine or washing-drying machine of the present invention includes: a rotating drum for storing clothes; a motor for driving the rotating drum; an outer tank for housing the rotating drum; a box for supporting the outer tank; and a device for blowing warm air into the rotating drum. The drying device is characterized in that the drying device has: a first drying path for sucking in air in the above-mentioned rotary drum, blowing warm air from the front side of the above-mentioned rotary drum and circulating the warm air; The second drying path blows warm air inside and discharges the air in the rotating drum to the outside of the box; it also has a switching mechanism for switching between the first drying path and the second drying path.

Description

Dryers and Washer Dryers

technical field

The present invention relates to a dryer and a washing-drying machine provided with a device for drying clothes.

Background technique

Clothes are dried by blowing high-temperature and low-humidity air (warm air) into the drum using a blower fan and a heat source to increase the temperature of the clothes to evaporate moisture from the clothes and discharge the evaporated moisture to the outside of the machine. As a method of removing evaporated moisture, there are exhaust methods that discharge the washer-dryer as they are (new air is always supplied) and dehumidification methods that cool evaporated moisture to condense and remove moisture (make the original some air circulation). In general, although the exhaust method can reduce power consumption, there is a problem that the humid air is exhausted outside the machine and the humidity of the room is increased.

In addition, in order to shorten drying time and reduce power consumption, there is a method of increasing the air volume of warm air or increasing the temperature of warm air. In a general washing-drying machine or drying machine for clothes, warm air is blown to clothes from one direction of a rotating drum accommodating clothes, and warm air is discharged from an opposite direction. However, if the amount of clothes increases, the clothes on the side in contact with the warm air dry quickly because the clothes are difficult to move in the rotary drum, and on the contrary, the clothes on the opposite side are difficult to contact with the warm air and dry slowly. Therefore, when the temperature of the clothes is prioritized and the operation ends when the temperature reaches T2, the clothes on the rear side are not dried enough; when the clothes are operated without uneven drying, the temperature of the clothes on the front side is too high The problem.

Then, there are Patent Document 1 - Japanese Patent Laid-Open No. 2006-354 and Patent Document 2 - Japanese Patent Laid-Open No. 2008, as laundry dryers (or dryers) that increase drying efficiency by blowing warm air from multiple directions of the rotating drum. - Washing and drying machine disclosed in Publication No. 259549. The former washing-drying machine has a plurality of circulation paths for supplying warm air to the rotary drum, at least one of the blowing ports of the warm air provided in the plurality of circulation paths is provided in the inner side wall area of the rotary drum, and At least one other is arranged in the region of the front side wall of the rotary drum. The blower fan is arranged on each of the plurality of circulation paths, and the heating mechanism is arranged on at least one of the plurality of circulation paths. The latter washing-drying machine has a single blower fan, and switches the front and rear warm air blowing ports of the rotary drum with a switching valve. Since these drying machines can evenly blow warm air to clothes, drying with less uneven drying can be realized.

The prior art described above does not consider the drying method (exhaust method, dehumidification method) although it is provided with a plurality of warm air blowing ports and can achieve drying with less uneven drying.

In the above-mentioned drying methods, although there are exhaust methods that discharge the humid air in the rotary drum to the outside of the machine as they are (new air is always supplied) and methods that cool the evaporated moisture to condense and remove the moisture. The dehumidification method (recirculation of existing air), but the above-mentioned prior art does not take into account the reduction of the different power consumption of these methods.

Contents of the invention

The purpose of the present invention is to provide a drying machine or washing machine that can prevent uneven drying of clothes, and take into account the above-mentioned differences in drying methods to suppress the discharge of air with moisture to the outside of the machine as much as possible and reduce the power consumption of drying. dryer.

In order to achieve the above object, the washing and drying machine of the present invention has: a rotating drum for accommodating clothes; a motor for driving the rotating drum; an outer tank for accommodating the above-mentioned rotating drum; a box supporting the outer tank; The drying device of warm air is characterized in that the drying device has: a first drying path for sucking air in the above-mentioned rotating drum, blowing warm air into the above-mentioned rotating drum and circulating the warm air; The second drying path for blowing warm air into the drum and discharging the air in the rotating drum to the outside of the cabinet also has a switching mechanism for switching between the first drying path and the second drying path.

The effect of the present invention is that, according to the present invention, since there is a first drying path as a dehumidification method, a second drying path as an exhaust method, and a switching device for switching these first drying paths and second drying paths, it can effectively Make use of these two different drying methods.

For example, in the second half of drying, since the moisture contained in the air after contacting the clothes is not so much, switching to the second drying path in the second half of drying can prevent the air with moisture from being discharged outside the machine. , and can reduce power consumption.

In addition, since the blowing direction of the warm air is changed while switching the drying path, the warm air can be brought into contact with the clothes from a direction different from that in the first half of drying, and uneven drying can be suppressed.

Description of drawings

Fig. 1 is a perspective view showing the appearance of a drum-type washer-dryer according to the present invention.

Fig. 2 is a perspective view showing an internal structure of the casing of the drum type washing and drying machine according to the present invention, which is partially cut away.

Fig. 3 is a perspective view showing an internal structure of the casing of the drum type washing and drying machine according to the present invention, which is partially cut away.

Fig. 4 is a rear view showing an internal structure by removing a rear cover of the drum type washing and drying machine of the present invention.

Fig. 5 is a side view showing the internal structure of the drum-type washer-dryer of the present invention.

Figure 6 is a perspective view of the outer tank with the rear duct.

Fig. 7 is a front view of an outer tank cover provided with a front warm air blowing port.

Fig. 8 is a sectional view along line A-A of the front warm air blowing port of Fig. 7 .

Fig. 9 is a cross-sectional view showing the outer tank and the washing and dehydrating tank of the rear warm air blowing port.

Fig. 10 is a front view of the drum bottom shown in the C-C section of Fig. 9 .

Fig. 11 is a sectional view showing the air supply and exhaust valve.

Fig. 12 is a schematic diagram showing the flow of air.

Fig. 13 is a photograph of clothes after drying in the conventional washer-dryer and the washer-dryer of the present invention.

Fig. 14 is a graph showing changes in temperature and water content of clothes in a drying process of a conventional washing and drying machine.

Fig. 15 is a graph showing changes in temperature and water content of clothes in a drying process of the washing and drying machine of the present invention.

Fig. 16 is a sectional view showing an intake valve.

Fig. 17 is a schematic diagram showing the flow of air.

Fig. 18 is a schematic diagram showing the flow of air.

In the picture:

1-box, 2-outer tank, 2d-outer tank cover, 3-washing and dehydration tank, 4, 28a-motor, 6-operating panel, 8-drying filter, 8-door, 16-water supply solenoid valve, 27-filter duct, 28-air supply unit, 28b-fan cover, 29-drying duct, 31-heater, 32-front blowing port, 32d-nozzle, 33-suction duct, 38-control device, 51 - rear pipe, 52 - front blowing port, 53 - labyrinth seal, 54 - switching valve, 55 - suction and exhaust valve, 60 - suction valve.

Detailed ways

Embodiments of the present invention will be described below using the drawings.

Fig. 1 is an external perspective view of a drum-type washing-drying machine according to an embodiment example of the present invention, Fig. 2 is a perspective view of a box partly cut away to show an internal structure and viewed obliquely from the front, and Fig. 3 is a perspective view showing an internal structure of a box Figure 4 is a rear view with the back cover removed to show the internal structure, and Figure 5 is a side view showing the internal structure.

Reference numeral 1 is a box body constituting the outer contour. The box body 1 is mounted on a base 1h, and is composed of left and right side panels 1a, 1b, a front cover 1c, a rear cover 1d, an upper cover 1e, and a lower front cover 1f. The left and right side panels 1a, 1b are combined with a U-shaped upper reinforcement 1j, front reinforcement 1k, and rear reinforcement (not shown) to form a box-shaped box 1 including a base 1h, which has sufficient strength as a box.

Reference numeral 9 is a door provided substantially at the center of the front cover 1c to close an inlet for clothing in and out, and is supported openably and closably by a hinge provided on the front reinforcing member. The door is opened by releasing a locking mechanism (not shown) by pressing the door opening button 9d, and locked and closed by pushing the door onto the front cover 1c. The front reinforcement has a circular opening concentric with the opening of the outer tank described later and used for putting in and out clothes.

Reference numeral 6 is an operation panel arranged on the upper center of the box body 1 , which has: a power switch 39 , operation switches 12 , 13 and a display 14 . The operation panel 6 is electrically connected to the control device 38 provided at the lower part of the box body 1 .

Number 3 is a rotatably supported cylindrical washing and dehydrating tank (rotary drum), its outer peripheral wall and bottom wall have a plurality of through holes for water and ventilation, and its front end surface is provided with openings for clothing in and out Section 3a. A fluid balancer 3c integrated with the washing and dehydrating tub 3 is provided outside the opening 3a. A plurality of lifters 3b extending in the axial direction are arranged on the inner side of the outer peripheral wall. When washing and drying, if the washing and dehydration tank 3 rotates, the clothes will rise along the outer peripheral wall due to the lifters 3b and centrifugal force, and fall down due to gravity. repeated movement. The rotation center axis of the washing and dehydrating tub 3 is installed horizontally or inclined so that the side of the opening 3a becomes higher.

Reference numeral 2 is a cylindrical outer tank, and coaxial washing and dehydration tank 3 is housed inside it, and its front side is open, and motor 4 is installed in the outer center of the rear side end face. The rotating shaft of the motor 4 penetrates the outer tank 2 and is combined with the washing and dehydrating tank 3 . An outer tank cover 2d is provided at the front opening to store water in the outer tank. An opening 2c for putting clothes in and out is provided at the center of the front side of the outer tank cover 2d. This opening 2 c is connected to the opening provided on the front reinforcing member 37 with a rubber bellows 10 , and the outer tank 2 is water-sealed by closing the door 9 . A drain port 2b is provided at the lowermost part of the bottom surface of the outer tank 2, and a drain hose 26 is connected thereto. A drain valve 25 is provided in the middle of the drain hose 26, and water is stored in the outer tank 2 by closing the drain valve and supplying water, and the water in the outer tank 2 is discharged outside the machine by opening the drain valve. An overflow port 2e is provided on the front outer peripheral portion of the outer tank cover 2d, and a drain hose 26 is connected to the downstream side of the drain valve 25 with an overflow hose 2f.

The outer tank 2 is anti-vibration supported by a suspension 5 (consisting of a coil spring and a damper) that fixes the lower side to the base 1h. In addition, the upper side of the outer tank 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcement so that the outer tank 2 is prevented from falling in the front-back direction.

Reference numeral 19 is a detergent container arranged on the upper left side in the casing 1, which is equipped with a detergent tray 7 that is pulled out from the front opening. When adding detergent, the detergent tray 7 is pulled out as shown by the dashed-two dotted line in FIG. 1 . The detergent container 19 is fixed on the upper reinforcement 1j of the box body 1 .

On the rear side of the detergent container 19, components related to water supply, such as a water supply solenoid valve 16, a bath water supply pump 17, and a water level sensor (not shown), are provided. The top cover 1e is provided with a water supply hose connection port 16a connected to a water tap, and a water suction hose connection port 17a for sucking out excess water in the bath water. The detergent container 19 is connected to the outer tank 2, and the washing water is supplied to the outer tank 2 by opening the water supply solenoid valve 16 or operating the bath water supply pump 17.

Reference number 29 is the dry pipeline that is arranged on the back side of casing 1 longitudinally, and the bellows B (29a) made of rubber is used in the pipeline bottom to be connected with the suction port 2a that is arranged on the back side below of outer tank 2. A water-cooled dehumidification mechanism (not shown) is housed in the drying pipeline 29, and a cooling water hose 24 is used to connect the water supply solenoid valve 16 and the water-cooling dehumidification mechanism, and supply cooling water to the water-cooling dehumidification mechanism by opening the water supply solenoid valve. The cooling water flows down the wall surface of the drying duct 29, flows into the outer tank 2 from the suction port 2A, and is discharged from the drain port 2b.

The upper part of the drying duct 29 is connected with the filter duct 27 arranged on the right side of the upper part in the casing 1 along the front-rear direction. A suction and discharge valve 55 is provided at the connection portion with the filter duct 27 at the upper part of the drying duct 29 . In front of the filter duct 27 there is an opening into which the pull-out filter drier 8 is inserted. The air entering the filter duct 27 from the drying duct 29 flows into the mesh filter 8a of the drying filter 8 to remove lint. Cleaning of the dry filter 8 is performed by pulling out the dry filter 8 and taking out the mesh filter 8a. In addition, an opening is provided on the lower surface of the filter duct 27 where the dry filter 8 is inserted, and an air intake duct 33 is connected to the opening.

The blower unit 28 includes a driving motor 28a, a fan impeller (not shown), and a fan cover 28b. A heater 31 for heating the air blown from the fan impeller is installed in the fan cover 28b. The input power of the heater 31 can be switched, and the heater in this embodiment has a strong mode and a weak mode. An outlet of the air supply unit 28 is connected to a warm air duct 30 . The warm air duct 30 is connected to the front blowing port 32 provided in the outer tank cover 2d via a rubber bellows A (30a) and a bellows joint 30b.

Reference numeral 51 is a rear pipe, as shown in the perspective view of the outer tank in FIG. The front part of the rear duct is connected to the rear opening 30c of the bellows joint 30b, and the rear part thereof is connected to the rear blowing port 52 provided on the rear surface of the outer tank 2 . A switching valve (switching valve) 54 for switching (switching) the front blowing port 32 and the rear blowing port 52 is provided in the bellows joint 30b.

In this embodiment, since the air supply unit 28 is arranged on the upper right side in the box body 1, the front blowing port 32 is arranged at a position obliquely above the right side of the outer tank cover 2d, so as to shorten to the front blowing port 32 as much as possible. distance to minimize pressure loss and heat dissipation. However, since the rear blowing port 52 is located substantially point-symmetrically to the air intake 2a of the drying duct 29 on the upper back side, the rear duct 51 is longer in length, and heat can be easily dissipated from the rear duct 51. Therefore, the rear duct 51 and the outer tank 2 are arranged to closely fit. In this way, the heat of the warm air heated by the heater 31 can be reduced to be dissipated into the box while passing through the rear duct 51 . Furthermore, since the cross-sectional shape of the rear duct 51 is made U-shaped, and the opening side is closely attached to the outer peripheral surface of the outer tank 2, the method of using the outer peripheral surface of the outer tank 2 to form the rear duct 51 reduces the number of pipes. The heat dissipation area can further increase the effect of preventing heat dissipation.

A temperature sensor (not shown) is provided at the drain port 2b, the air intake port and the discharge port of the blower unit 28 .

The present invention is characterized in that high-speed air is brought into direct contact with the clothes, while stretching the wrinkles of the clothes, while promoting the evaporation of water from the clothes, and switching the blowing port of the warm air according to the progress of drying, thereby reducing the unevenness of drying. Reduce power consumption. For this reason, the blower unit 28 that generates high-speed wind, and the front blowing port 32 and the rear blowing port 52 that directly contact the clothes with the wind are required. The required performance of the blower unit will be described later.

Next, the front blowing port 32 will be described in detail using FIGS. 7 and 8 . FIG. 7 is a front view of the outer tank cover 2d where the front warm air blowing port 32 is provided, and FIG. 8 is a cross-sectional view of the front blowing port 32 shown by the dashed-two dotted line A-A in FIG. 7 .

The front blowing port 32 is provided along the opening 2c from the front side of the outer tank cover 2d, and flow paths 32b, 32c are formed inside. A bellows joint 30b is attached to the inlet of the front blowing port 32, and a nozzle 32d is formed at the outlet of the flow path 32c. In order to prevent clothing from entering the gap between the washing and dehydrating tank 3 and the outer tank cover 2d, the inner diameter of the opening 2c of the outer tank cover 2d and the inner diameter of the opening 3a of the washing and dehydrating tank 3 are designed to be substantially the same. Therefore, the outlet portion 32a of the front blowing port 32 is formed to protrude inwardly from the inner peripheral surface of the opening portion 2c, and the nozzle 32d is opened into the washing and dehydrating tank 3 . In this way, the warm air blown from the nozzle 32d directly contacts the clothes in the washing and dehydrating tub 3 .

In addition, if the protruding amount of the outlet portion 32a is too large, since it will hinder the movement of the clothes during washing and drying, the nozzle is made into a flat slit shape as shown in FIG. 7 and the protruding amount is small, and, The surface shapes of the opening 2c and the outlet 32a are smoothly changed. Furthermore, the flow paths 32b and 32c are free from useless protrusions and sudden changes in the flow direction, and the area of the flow paths toward the nozzle 32d is gradually reduced. In this way, the pressure loss and fluid sound generated when the high-speed wind flows through the flow channels 32b and 32c can be reduced.

The switching valve 54 provided in the bellows joint 30b is composed of a drive motor 54a and a valve body 54b. The drive motor 54a is attached to the bellows joint 30b with a fixing part 54c. The valve body 54b is rotated by rotating the rotating shaft 54d provided at the end part of the valve body 54b by the drive motor 54a. When the valve body 54b is in the position shown in FIG. 8, it is defined as closing the switching valve, and when the valve body 54b is in the position of the two-dot chain line, it is defined as opening the switching valve. When the switching valve 54 is closed, since the back opening 30c is closed, the warm air is blown from the front blowing port 32, and if the switching valve 54 is opened, the air passage to the front blowing port 32 is closed, and the warm air is opened from the back. 30c is blown from the rear blowing port 52 through the rear duct 51 .

Next, the situation of the rear blowing port 52 part will be described in detail using FIG. 9 and FIG. 10 . Fig. 9 is a cross-sectional view of the rear of the outer tank and the washing and dehydrating tank 3 taken along the line B-B of the two-dot chain line in Fig. 4 . 10 is a cross-sectional view showing the bottom surface of the washing and dehydrating tank 3 by cutting the outer tank 2 and the washing and dehydrating tank 3 along line C-C in FIG. 9 .

The bottom surface of the outer tank 2 is provided with a rear blowing port 52 and an air intake 2a, the air intake 2a is located at the lower part of the outer tank, and the rear blowing port 52 is arranged at the upper part of the outer tank, both of which are approximately at a point relative to the rotating shaft 4a of the motor 4. Symmetrical position. In addition, the radial position of the air intake port 2a is located on the outermost peripheral side, and the rear blowing port 52 is located on the inner side than that. A plurality of ring-shaped protrusions B53b are formed on the outer tank bottom surface on the inner peripheral side of the position of the air inlet 2a and on the outer peripheral side of the rear blowing port 52 . In addition, a plurality of ring-shaped protrusions A53a concentric with protrusions B53b are formed on the bottom surface outer tank side of washing and dehydrating tank 3 . The protrusion B53b and the protrusion A53a are mutually differently arrange|positioned, and the labyrinth seal 53 is comprised. The bottom surface of the washing and dehydrating tank 3 opposite to the rear part blowing port 52 is provided with a plurality of vents 3d, and the vents 3d are formed in a net shape or made of many small holes, so as to prevent the clothes from flying out and reduce the ventilation resistance. In addition, a plurality of small holes 3e are provided on the outside of the labyrinth seal 53 on the bottom surface of the washing and dehydrating tank 3 .

In this way, by disposing the positions of the rear blowing port 52 and the air intake port 32 at a distance, and providing a labyrinth seal between the two, it is possible to prevent the warm air blown from the rear blowing port 52 from directly entering the air intake port 2a. , the wind can be effectively brought into contact with the clothes in the washing and dehydrating tub 3 . In addition, since the wind speed of the warm air blown from the rear blowing port is so high that the wrinkles of the clothes can be stretched, even if a large amount of clothes are put into the washing and dehydrating tub 3 and the clothes block the air vent 3d, Since the clothes are pushed by the wind to form gaps between the clothes, since the warm air is easy to enter the washing and dehydrating tank 3, the wind can also be effectively brought into contact with the clothes.

In the example of this embodiment, the wind speed of the warm air blown from the rear blowing port 52 is slower than the wind speed blown from the front blowing port 32 to achieve the effect of not hindering the stretching of the wrinkles of the clothes (the effect of expanding the clothes) Degree. Generally, a flange 23 having a plurality of radial ribs is attached to the washing and dehydrating tank 3 , and a rotating shaft 4 a of the motor 4 is connected to the center of the flange 23 . When the washing and dehydrating tub 3 rotates, the radial ribs periodically cross the rear blowing port 52 . Therefore, if the wind speed at the rear blowing port 52 is too fast, the wind noise will be generated and the noise will be increased. Therefore, the wind speed is slowed down, and the increase of the wind noise is suppressed.

Actually, the nozzle area of the rear blowing port 52 is made larger than the area of the nozzle 32d of the front blowing port 32 . When the number of revolutions of the air blowing unit 28 is constant, the wind blown from the rear blowing port 52 is slower than the wind blowing from the front blowing port 32 , but the air volume is increased. Although the effect of water evaporation from the clothes due to wind speed is reduced, the drying efficiency is not lowered because it cancels out the effect of water evaporation caused by an increase in air volume.

A vent 23a is provided at a position facing the rear portion blowing port 52 of the flange 23, and a plurality of small holes 3f are also provided on the bottom surface of the outer groove covering the flange, so that even if the flange 23 comes to the rear portion of the blowing port 52, Under the position situation, warm air also can enter in the washing and dehydrating tank 3 concurrently. In addition, the shape of the rear blowing port 52 is preferably a slit shape longer than the width of the radial rib of the flange 23 in the circumferential direction. In this way, since the rear blowing port 52 is not completely closed by the rib of the flange 23, warm air can be efficiently introduced into the washing and dehydrating tank 3.

FIG. 11 shows the detailed structure of the intake and exhaust valve 55 . Fig. 11 is a sectional view taken along the dashed-two dotted line D-D in Fig. 4 . The intake/exhaust valve 55 is composed of a drive motor 55a, a valve body 55b, and a valve seat 55c. The valve body 55b is rotated by rotating the rotation shaft 55d provided in the center part of the valve body 55b by the drive motor 55a. As shown in Figure 11, the state of closing the valve seat 55c with the valve body 55b is called closing the suction and exhaust valve; as shown by the two-dot dash line, the state of blocking the drying pipeline 29 and the filter pipeline 27 is called opening. Suction and exhaust valves. When the intake and exhaust valve 55 is opened, an intake port 56 and an exhaust port 57 are formed. The suction port 56 is opened in the inner space of the upper surface cover 1e at the upper part of the box body 1 . The exhaust port 57 is connected with the exhaust pipe 58 and leads to the room. A filter 59 is provided at the outlet of the exhaust pipe 58 to remove lint contained in the exhaust.

The flow of air during drying operation can be realized in four ways by using the switching state of the switching valve 54 and the switching state of the suction and exhaust valve 55, but in the present invention, both the switching valve 54 and the suction and discharge valve 55 are closed. Or two types of operation with both turned on. 1 to 5 and 8 to 11, the flow of the wind is shown by solid arrows and dotted arrows, but it is shown in the structural diagram of FIG. 12 for easy understanding. First, a case where both are turned off will be described (solid arrow in FIG. 12 ). If the air blowing unit 28 is operated and the heater 31 is energized, high-speed warm air (arrow 41) is blown from the nozzle 32d to the washing and dehydrating tank 3, and the warm air contacts the wet clothing, heating the clothing and making the moisture flow from the clothing. evaporation. The air that becomes high temperature and high humidity flows from the through hole provided on the washing and dehydrating tank 3 to the outer tank 2, is sucked into the drying duct 29 from the air inlet 2a, and flows from bottom to top in the drying duct 29 (arrow 42). The cooling water from the water-cooling dehumidification mechanism falls onto the wall of the drying pipe 29, and the high temperature and high humidity air is cooled and dehumidified by contacting with the cooling water, and becomes dry low temperature air and enters the filter pipe 27 (arrow 43). The lint is removed by the mesh filter 8A provided in the filter duct 27, enters the suction duct 33, and is sucked by the blower unit 28 (arrow 44). Then, it is heated by the heater 31 again, and the cycle of blowing into the washing and dehydrating tank 3 is performed. This circulation forms a first drying (circulation) path as a dehumidification method. Meanwhile, the washing and dewatering tank 3 is rotated forward and backward at a low speed until the clothes are lifted to the vicinity of the nozzle 32d, so that the high-speed warm air directly contacts the clothes.

Next, when both are opened (dashed arrow in FIG. 12 ), if the blower unit 28 is operated, the air of the casing 1 is sucked into the filter duct 27 from the air inlet 56 (dashed arrow 46). Then, it enters the suction duct 33, is sucked by the air supply unit (dashed arrow 63), enters the rear duct 51 (dashed arrow 47) from the bellows joint 30b, and is guided to the back side of the outer tank 2 by the rear duct. Blowing port 52, from the rear side of washing and dehydrating tank 3, is blown into washing and dehydrating tank 3 (dotted line arrow 48), contacts with the clothing of washing and dehydrating tank 3 insides, and moisture is evaporated from clothing. Then, the air flows to the outer tank 2 from the through hole provided in the washing and dehydrating tank 3, and is forced into the drying duct 29 from the air inlet 2a (dashed arrow 62). Air flows from bottom to top in the drying duct 29 and enters the exhaust duct 58 from the exhaust port 57, and is discharged outside the machine after the filter 59 removes lint (dashed arrow 45). Thus, a second drying (circulation) path as an exhaust method is formed. Meanwhile, the washing and dehydrating tank 3 is rotated forward and backward at a low speed, and the clothes are lifted to the vicinity of the rear blowing port 52 so that the wind directly contacts the clothes.

Drying is carried out as follows. In the preheating period for raising the temperature of the clothes in the initial stage of drying, it is important to supply as much heat as possible to the clothes in order to rapidly raise the temperature of the clothes. During preheating, the moisture evaporated from the clothes is reduced.

As the temperature of the clothes rises, the rise in the temperature of the clothes becomes slower due to the heat of vaporization due to the increase of moisture evaporated from the clothes, and soon the heating and the heat of vaporization reach equilibrium, and the temperature of the clothes remains almost constant (constant drying). After the amount of moisture evaporated from the clothes begins to increase, the water supply solenoid valve 16 is opened to supply cooling water to the water-cooled dehumidification mechanism in the drying pipeline 29, so that the humid air containing evaporated moisture is cooled and condensed to remove moisture in the air.

If the moisture content of the clothes decreases, the heat of vaporization decreases, and the temperature of the clothes starts to rise again. If the clothes become dehydrated, the clothes reach the same temperature as the warm air and finish drying (deceleration drying). The time when the temperature of the clothes that enter deceleration drying starts to rise is when the dryness reaches around 0.9. In addition, the degree of dryness is defined by weight of dry laundry/weight of laundry after drying. The weight of the dry clothes is the weight when the clothes are left for a whole day and night in an environment with a temperature of 20° C. and a relative humidity of 65%.

The basic formula of the drying speed when moisture evaporates from the surface of the material (clothes) is represented by Mathematical Formula 1.

(mathematical formula 1)

Qs=α(Ta-Ts)/γ

Among them: Qs: drying speed (kg/m ² h)

α: Heat transfer coefficient (KJ/m ² h°C)

γ: latent heat of evaporation (KJ/kg)

Ta: Warm air temperature (°C)

Ts: evaporation surface temperature (°C)

In addition, when the surface area of the clothing surface is A (m ² ), the drying rate Q _A (kg/h) is expressed in Mathematical Expression 2.

(mathematical formula 2)

Q _A = Qs·A=α·A(Ta-Ts)/γ

In addition, the drying speed when moisture evaporates from the inside of the laundry is expressed in Mathematical Expression 3.

(mathematical formula 3)

Qi=K(Ta-Ts)/γ

Among them: Qi: drying speed (kg/m ² h)

K: heat passing rate (KJ/m ² h°C)

In addition, the heat transmission rate K is represented by Mathematical Formula 4.

(mathematical formula 4)

K=1/(1/α+L/λ)

L: Thickness of cloth (m)

λ: thermal conductivity (KJ/m h K)

According to Mathematical Formula 1, Mathematical Formula 2, Mathematical Formula 3, and Mathematical Formula 4, in order to speed up the drying (evaporation) speed, the following measures should be taken:

(1) Increase the warm air temperature Ta.

(2) Improve the heat transfer coefficient α.

(3) Increase the surface area A.

(4) Improve the thermal conductivity λ.

(5) Reduce the thickness of the cloth.

Since the temperature of the warm air is too high, it may cause damage to the clothes, so it is better to suppress it to a maximum of about 90°C. Therefore, it is difficult to increase the drying speed by increasing the temperature. In addition, since the thermal conductivity of the cloth and the thickness of the cloth are determined by the clothing, they cannot be controlled. Since the heat transfer coefficient is usually proportional to the 0.8th power of the wind speed, the heat transfer coefficient can be improved by increasing the wind speed. In terms of the surface area of the clothes, if the clothes are wound into balls, the apparent surface area decreases. In addition, if it is lumpy, the apparent cloth thickness will become thicker, and the drying rate will decrease. Therefore, it is advisable to expand the clothing as much as possible.

These principles can be realized by increasing the wind speed to 100m/s. Fig. 13 is a photograph comparing the state of clothes dried by a conventional washing and drying machine and the washing and drying machine of this embodiment. The dry rated capacity of the washer-dryer for comparison is 7 kg. The existing washing and drying machine operates with an air volume of 1.4 m ³ /min and a wind speed of 20 m/s. The washing and drying machine of this embodiment operates at an air volume of 1.65 m/s with the switching valve 54 and the suction and exhaust valve 55 closed m ³ /min and a wind speed of 100m/s. The amount of cloth is 3kg, and the clothes for comparison are cotton pajamas that are very prone to wrinkles. Existing samples are twisted together into strips, the surface area is reduced, and the apparent thickness of the cloth is increased, hindering the evaporation of water and reducing the drying speed. On the contrary, the sample of this example is a finished product in which the clothes are unfolded and there are few wrinkles. The reason why there are few wrinkles is that when a high-speed wind is blown on the clothes, the clothes are spread by the wind pressure. In this way, once the clothes are expanded, the surface area will increase, and the apparent thickness caused by the overlapping of clothes will not increase, and the heat transfer coefficient can also be improved, so the water is easy to evaporate and the drying speed increases, which can reduce the power consumption of drying. .

However, if the amount of cloth increases, it is difficult for the clothes to move in the washing and dehydrating tank 3, and the drying of the clothes varies with the position of the clothes because the wind does not generally contact the clothes. Fig. 14 shows the change of the water content of the clothes and the temperature of the clothes when the heater is dried in a strong mode. In the first half of drying, because the moisture contained in the clothing is more, the volume of the clothing is smaller, and the clothing is easy to move in the washing and dehydrating tank 3, so the warm air is generally in contact with the clothing, and the temperature of the clothing is basically the same. The moisture content was found to reduce garment swelling as drying progressed. In this way, the movement of the clothes in the front and back directions in the washing and dehydrating tank 3 becomes less, and the drying speeds of the clothes on the front side and the clothes on the back side in the washing and dewatering tank 3 begin to differ. The clothes on the front side are dried quickly due to the good contact with the warm air, and the temperature of the clothes starts to rise when entering the deceleration drying period from an earlier time. On the other hand, since the clothes on the inner side are less likely to be in contact with the warm air, drying is slow, the time to enter the deceleration drying period is later, and the time for the temperature of the clothes to rise also becomes later. In this way, uneven drying occurs. When the clothes on the inside are dried to an appropriate degree of dryness (the degree of dryness ranges from about 1.02 to about 1.04) and the operation is ended, the temperature of the clothes on the inner side is T2 (about 80-90°C). The clothes on the front side are in an excessively dry state, and their temperature rises to the level that T1 (about 100° C.) is basically the same as the warm air.

Then, in the first half of drying, the heater 31 adopts the strong mode, the switching valve 54 and the intake and exhaust valve 55 are closed, and high-speed wind is blown from the front blowing port 32 . Then, in the second half of drying, the switching valve 54 and the intake and exhaust valve 55 are opened, and the heater 31 adopts a weak mode to blow warm air from the rear blowing port 52 . In the first half of drying, drying is performed at a high drying speed due to the effect of high-speed wind. As the drying progresses, the deceleration drying period starts, and after the clothes on the front side are almost dried, warm air is blown from the rear blowing port 52 . Since the warm air contacts the inner clothes which are difficult to dry only by the warm air from the front blowing port 32, the inner clothes are dried quickly. The reason why the heater 31 adopts the weak mode in the second half of drying is because, at this moment, the drying of the inner clothes is carried out to the extent that it enters the deceleration drying period, and the body is also fully heated, so in order to dry the inner clothes, the heater 31 It is sufficient to adopt weak mode. In addition, since the area of the rear part blowing port 52 is larger than the area of the front part blowing port 32, if the operation of drying the latter half without changing the number of revolutions of the air blowing unit 28 is performed, compared with the drying of the first half with a large air volume. The air is used for drying, so the drying speed can be further accelerated. Furthermore, in order to make the air volumes of the first half of drying and the second half of drying the same, the number of revolutions of the blower unit 28 for the second half of drying may be reduced. In this way, since the input power of the blower unit 28 can be reduced, power consumption can be reduced.

As described above, since the hard-to-dry back clothes can be dried efficiently, wasteful power consumption can be suppressed, uneven drying of the clothes can be prevented, and excessive temperature rise of the clothes can be prevented.

Fig. 15 shows the temperature change and the water content change of the clothes being dried in the present embodiment. In the first half of drying, the change in temperature is the same as that of the conventional dryer, but in the second half of drying when the blowing port is switched to the rear, it can be seen that the temperature of the clothes on the inner side rises rapidly and dries. On the other hand, although the temperature of the clothes on the front side that is not in contact with the warm air is lowered, there is no problem because they are already dried. In this way, since the inner side clothes can be dried effectively in the second half of drying, the drying time can also be shortened from t1 when only using the front blowing port to t2, which can reduce time and reduce power consumption.

In addition, in order to further reduce the power consumption, the heater 31 may be turned off in the second half of drying. This is because the temperature of the first half of the clothes and the outer tank, washing and dehydration tank 3 is very high, and the air temperature in the casing 1 also rises. In the second half of drying, if the suction and exhaust valve 55 is opened to inhale the heated air in the casing 1, the air supply unit 28 is used for adiabatic compression to further increase the temperature. In the case of this embodiment, the number of revolutions of the blower unit 28 is 14000 revolutions per minute, and the temperature is raised by about 8° C. by the blower fan. And, since the air gets heat from the outer tank 2 while passing through the rear duct 51 that is arranged to be in close contact with the outer peripheral surface of the outer tank 2, the temperature is further increased, so it can be blown from the rear blowing port 52 even without a heater. warm air. When the ambient temperature is 20°C, the temperature of the warm air blown from the rear blowing port is about 50°C immediately after the second half of drying, and the temperature decreases over time, but it is 35°C at the end of drying about.

Although the above has been described from the viewpoint of power consumption, the example of this embodiment is also advantageous from the viewpoint of preventing wrinkles during drying. That is, in the first half of drying, warm air with a wind speed of about 100 m/s and an air volume of about 1.6 m ³ /min is blown from the front blowing port 32, and the clothes are dried while preventing wrinkles by spreading the clothes with wind pressure. . However, if the amount of laundry is too large, it is difficult for high-speed wind to come into contact with the laundry located on the back side of the washing and dehydrating tank 3, and wrinkling of the back laundry cannot be prevented. At the moment of switching to the second half of drying, the clothes on the inside are dry enough to enter the deceleration drying period, and the dryness is about 0.9. When the dryness exceeds 0.9, it becomes difficult to eliminate the wrinkles that have been produced on the clothes at this time. In this embodiment, since the warm air is blown from the rear blowing port 52 when the dryness of the inner clothing reaches about 0.9, it has the effect of expanding the wrinkles of the inner clothing. Considering the effect of spreading wrinkles, it is preferable that the wind speed and air volume blown from the rear blowing port 52 are about the same as the warm air blown from the front blowing port 32 . However, due to the rotation of the washing and dehydrating tank 3 , the high-speed wind comes into contact with the radial ribs of the flange 23 to generate a wind blowing sound. Therefore, in the present embodiment, the area of the rear blowing port 52 is larger than the area of the front blowing port, the wind speed is set to 70m/s, and the air volume is set to 1.7m ³ /min to reduce the wind noise. . Even if the wind speed is reduced in this way, the wind speed is still faster compared with the wind speed (10-20m/s) of the conventional general washing and drying machine, and the wrinkle spreading effect is slightly lower than that of the front blowing port, but there is still enough wrinkle spreading effect . In addition, although warm air was not blown to the clothes on the front side in the second half of drying, since the clothes were dried in a state with few wrinkles, wrinkles were hardly increased during the operation in the second half of drying.

However, in order to further improve the drying efficiency, it is also conceivable to blow warm air from both the front blowing port 32 and the rear blowing port 52 while setting the switching valve 54 at the neutral position. However, in terms of the capacity of the air supply unit 28 of this embodiment, if the wind speed of 100 m/s is to be ensured, the air volume of each blowing port is about 0.8 m ³ /min. The effect is small, and the same drying quality as that of this embodiment cannot be obtained. If the capacity of the air supply unit is doubled, although the quality can be obtained by blowing the front and rear simultaneously, the power used for the operation of the air supply unit is also doubled. For commercial power supplies (100V, 15A), it is necessary Reducing the input power of the heater is not the best policy because the temperature of the warm air is lowered. In addition, due to the increase in the size of the blower unit, the size of the cabinet of the washing and drying machine has to be increased, which is also a problem from the viewpoint of installation performance (space saving). However, when a heat pump is used as a heat source for warm air, sufficient heat can be obtained even if the input power of the heat source is small, so high-efficiency drying and high-quality drying can be achieved by simultaneous front and rear blowing.

In the example of this embodiment, one blowing port is provided in the front and back of the washing and dehydrating tub 3, and the air intake port is one. This can be realized with a single air blowing unit by switching the front and rear blowing ports with a changeover valve, thereby making it possible to make a compact and low-cost washing and drying machine.

In addition, the warm air drying (circulation) path for front blowing is formed with a closed loop, and the warm air drying (circulation) path for rear blowing is formed with an open loop, and the closed loop and open loop are switched by the intake and exhaust valves. When switching from drying the first half to drying the second half, the rear clothes are dried to such an extent that they enter the deceleration drying period, and the water content of the clothes decreases. So, in the second half of drying, the air doesn't hold as much moisture after coming into contact with the laundry. Therefore, although the second half of the drying can also be dehumidified by water cooling in the drying pipe in a closed-loop state, but because the second half of the drying is performed with a weak heater or a heater-off operation, the dehumidification efficiency is lower due to the lower temperature of the warm air. not too high. Therefore, adopting the structure that makes the warm air drying (circulation) path an open loop, sucks dry air from the cabinet, and discharges the air containing the moisture evaporated from the clothes, the drying can be completed in a short time. At this time, the humidity released into the room is far less than that of drying the laundry in the room, and the room will hardly be humid.

Next, an example in which exhaust gas is not released into the chamber will be described using FIGS. 16 and 17 . A suction valve 60 is provided near the connection between the upper part of the drying duct 29 and the filter duct 27 . FIG. 16 shows the intake valve 60 in detail in a cross-sectional view taken along the dashed-two dotted line D-D in FIG. 4 . The intake valve 60 is composed of a driving motor 60a, a valve body 60b, and a valve seat 60c. The valve body 60b is rotated by rotating the rotating shaft 60d provided in the end part of the valve body 60b by the drive motor. As shown in Figure 16, the state of closing the valve seat 60c with the valve body 60b is called closing the suction and exhaust valve; as shown by the two-dot dash line, the state of blocking the drying pipeline 29 and the filter pipeline 27 is called opening. Suction and exhaust valves. When the intake and exhaust valve 60 is opened, the intake port 61 is formed.

Fig. 17 is a schematic diagram showing the flow of wind during drying operation. Also in this embodiment, two types of operations are performed in which both the switching valve 54 and the intake valve are closed or both are opened. The case where both are opened (solid line arrow in FIG. 17 ) is the same as the above-mentioned embodiment example, so its description is omitted, and only the case where both are open (dotted line arrow in FIG. 17 ) will be described. When the blower unit 28 is operated, the air in the housing 1 is sucked into the filter duct 27 from the air inlet 56 (dotted arrow 46 ). Then, it enters the suction duct 33 and is sucked into the air supply unit (arrow 44), enters the rear duct 51 (dashed arrow 47) from the bellows joint 30b, and is guided to the back side of the outer tank 2 at the rear duct, from which The rear blowing port 52 is blown into the washing and dehydrating tank 3 from the rear side of the washing and dehydrating tank 3 (dotted line arrow 48), and contacts the backside clothing in the washing and dehydrating tank 3 to evaporate moisture from the clothing. Then, the air flows into the outer tank 2 from the through hole provided on the washing and dehydrating tank 3, and a part is discharged from the overflow hose 2f (dotted line arrow 49) from the drain hose 26 to the outside of the machine from the overflow port 2e. The remaining part merges with the airflow from the overflow hose 2f through the drain valve 25 (dotted arrow 50 ) from the drain port 2b and is discharged out of the machine from the drain hose 26 . In general, since the drain hose is connected to the water distribution pipe, the air is discharged into the water distribution pipe and not discharged into the room, thereby preventing the increase of humidity in the room.

Although the example of the above-mentioned embodiment constitutes the warm air drying (circulation) path for front blowing by a closed loop, and the warm air drying (circulation) path for rear blowing is formed by an open loop, the reverse structure can also be obtained. Exactly the same effect. The air flow in this case is shown in the structural diagram of FIG. 18 (the structure is the same as the case shown in FIG. 12). The operation in this case is a cycle in which warm air is blown from the rear blowing port 52 in the first half of drying, and warm air is blown from the front blowing port 32 in the second half of drying. When the warm air is blown from the rear blowing port 52, if the switching valve 54 is opened and the intake valve 55 is closed, the air flows as indicated by the dotted arrows in the figure. If the air blowing unit 28 is operated and the heater 31 is energized, then the bellows joint 30b enters the rear portion duct 51 (dotted line arrow 47), and the rear portion duct is guided to the back side of the outer tank 2. The rear side of washing and dehydrating tank 3 is blown into washing and dehydrating tank 3 (dotted line arrow 48), contacts with the backside clothing in washing and dehydrating tank 3, and moisture is evaporated from clothing. The high-temperature and high-humidity air flows into the outer tank 2 from the through hole provided in the washing and dehydrating tank 3, is sucked into the drying duct 29 from the air inlet 2a, and flows upward in the drying duct 29 (dashed arrow 62). The air is cooled and dehumidified by the water-cooled dehumidification mechanism arranged in the drying pipeline 29 to become dry low-temperature air and enter the filter pipeline 27 (dotted arrow 67). Enter in the suction duct 33 after being removed by the mesh filter 8a that is arranged in the filter duct 27 again, be sucked in by the air supply unit 28, be heated again by heater 31, be blown in the washing and dehydrating tank 3 concurrently.

When warm air is blown from the front blowing port 32, the switching valve 54 is closed and the intake valve 55 is opened. When the blower unit 28 is operated, the air in the housing 1 is sucked into the filter duct 27 through the air inlet 56 (arrow 65 ). Then, it passes through the filter 8, the blower unit 28, and the heater 31, and enters the washing and dehydrating tank 3 from the front blowing port 32 (arrow 41). Contact with the clothes on the front side in the washing and dehydrating tub 3 to evaporate moisture from the clothes. Then, it flows into the outer tank from the through hole provided on the washing and dehydrating tank 3, and is pressed into the drying duct 29 from the suction port 2a (arrow 42). It flows from bottom to top in the drying duct 29 and enters the exhaust duct 58 from the exhaust port 7, and is discharged outside the machine after being removed by the filter 59 (arrow 64).

As mentioned above, according to this embodiment, by switching to the warm air drying (circulation) path in the first half formed by the closed loop, and the warm air drying (circulation) path in the second half formed by the open loop, it is possible to prevent the humid air from going out of the machine. discharge, and can reduce power consumption. In addition, since the blowing direction of the warm air is changed at the same time as the drying path is switched, the warm air can be brought into contact with the clothes from a direction different from that in the first half of drying, and uneven drying can also be suppressed.

In addition, since the high-speed warm air is directly blown on the clothes during the drying operation, the heat transfer coefficient between the clothes and the wind is improved, and the warm air heats the clothes efficiently. In addition, due to the high wind speed, the wind easily comes into contact with the laundry inside the rotary drum.

Furthermore, since the air is blown from the rear blowing port in the second half of drying, the drying of the clothes on the inner side of the rotary drum is promoted, uneven drying can be prevented, and drying time and power consumption can be shortened.

In addition, when the temperature of the clothes in the second half of drying is sufficiently raised, and the air is blown from the rear blowing port, power consumption can be reduced by weakly operating the heating mechanism. Alternatively, by stopping the energization of the heating mechanism, the air inside the box that has been heated in the first half of drying is sucked in from the suction part and blown to the clothes, since the warm air can be supplied without using the heating mechanism, so the power consumption can be further reduced .

In addition, when the warm air is blown in from the rear blowing port in the second half of drying, since the dry air in the box is sucked in and the wet air in the rotating drum is discharged out of the box, the moisture can be removed from the box more effectively. , can reduce power consumption more effectively. In this way, since the temperature rise of the clothes due to excessive drying of the clothes can be prevented, damage to the clothes can also be suppressed.

Furthermore, since the wind speed of the rear blowing port is lower than that of the front blowing port, it is possible to reduce the wind blowing sound generated when the wind blown from the rear blowing port comes into contact with the bottom plate of the rotary drum.

In addition, since the positional relationship between the suction port and the blowing port is set to a position away from the rotating shaft of the rotating drum in the middle, it can prevent the wind blown from the rear blowing port from being inhaled from the suction port without contacting the clothes, which can effectively Dry the laundry on the inside of the rotary drum efficiently.

Claims (11)

1. a washing dryer, possess: the swing roller of accommodating laundry; Drive the motor of this swing roller; The water jacket that holds above-mentioned swing roller; Support the casing of this water jacket; And, to the drying device that blows warm braw in above-mentioned swing roller, it is characterized in that,

Above-mentioned drying device has: from the suction inlet air amount of the back side that is arranged at above-mentioned swing roller, blow warm braw from the front side of above-mentioned swing roller and make the first dry path of warm braw circulation; And the suction extraneous air, the second dry path that blows warm braw and the air in above-mentioned swing roller is discharged to above-mentioned casing from above-mentioned swing roller rear side,

The switching mechanism that also there is switching the above-mentioned first dry path and above-mentioned the second dry path.

2. washing dryer according to claim 1, is characterized in that,

There is the air of flow in the above-mentioned first dry path or the above-mentioned second dry path and heated, at least can be with the heating arrangements of two-stage control,

In the initial stage of dry operating, utilize above-mentioned switching mechanism to switch to the above-mentioned first dry path, the output of above-mentioned heating arrangements is controlled and made it stronger,

From dry operating midway, utilize above-mentioned switching mechanism to switch to the above-mentioned second dry path, a little less than the output of above-mentioned heating arrangements is controlled and made it.

3. a washing dryer, possess: the swing roller of accommodating laundry; Drive the motor of this swing roller; The water jacket that holds above-mentioned swing roller; Support the casing of this water jacket; And, to the drying device that blows warm braw in above-mentioned swing roller, it is characterized in that,

Above-mentioned drying device has: the suction inlet that is arranged at the back side of above-mentioned swing roller; Suck air in above-mentioned swing roller and by the wind pushing mechanism of its discharge from this suction inlet; Be arranged at the suction and discharge switching mechanism between this wind pushing mechanism and above-mentioned suction inlet; Be arranged at the heating arrangements of the discharge side of above-mentioned wind pushing mechanism; Be arranged at a plurality of purge port in the downstream of this heating arrangements; And be arranged between above-mentioned heating arrangements and above-mentioned a plurality of purge port and switch the switching mechanism that blows destination of above-mentioned warm braw,

Above-mentioned a plurality of purge port at least has: purge port blowing in from the front side of above-mentioned swing roller to swing roller; And from the air-supply of the rear side of above-mentioned swing roller purge port,

Blow the occasion of warm braw in purge port from above-mentioned, to suck the mode again be blown in above-mentioned swing roller after the air in above-mentioned swing roller, make the warm braw circulation; Blow the occasion of warm braw in purge port from above-mentioned, be blown in above-mentioned swing roller after utilizing above-mentioned suction and discharge switching mechanism to suck extraneous air, and the air in above-mentioned swing roller is discharged to casing from above-mentioned suction and discharge switching mechanism.

4. a washing dryer, possess: the swing roller of accommodating laundry; Drive the motor of this swing roller; The water jacket that holds above-mentioned swing roller; The drainage mechanism that the washings that accumulate in this water jacket are carried out to draining; Support the casing of above-mentioned water jacket; And, to the drying device that blows warm braw in above-mentioned swing roller, it is characterized in that,

Above-mentioned drying device has: the suction inlet that is arranged at the back side of above-mentioned swing roller; Suck air in above-mentioned swing roller and by the wind pushing mechanism of its discharge from this suction inlet; Be arranged at the suction mechanism between this wind pushing mechanism and above-mentioned suction inlet; Be arranged at the heating arrangements of the discharge side of above-mentioned wind pushing mechanism; Be arranged at a plurality of purge port in the downstream of this heating arrangements; And be arranged between above-mentioned heating arrangements and above-mentioned a plurality of purge port and switch the switching mechanism that blows destination of above-mentioned warm braw,

Above-mentioned a plurality of purge port at least has: purge port blowing in from the front side of above-mentioned swing roller to swing roller; And from the air-supply of the rear side of above-mentioned swing roller purge port,

Blow the occasion of warm braw in purge port from above-mentioned, to suck the mode again be blown in above-mentioned swing roller after the air in above-mentioned swing roller, make the warm braw circulation; Blow the occasion of warm braw in purge port from above-mentioned, be blown in above-mentioned swing roller after utilizing above-mentioned suction and discharge switching mechanism to suck extraneous air, and the air in above-mentioned swing roller is discharged to casing from above-mentioned drainage mechanism.

5. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Above-mentioned heating arrangements at least can be exported with two-stage control, in the initial stage of dry operating, the output of above-mentioned heating arrangements is controlled and is made it stronger, and from above-mentioned, purge port blows warm braw; From dry operating midway, a little less than the output of above-mentioned heating arrangements is controlled and made it, from above-mentioned, purge port blows warm braw.

6. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Control device is switched on to above-mentioned heating arrangements in the initial stage of dry operating, and from above-mentioned, purge port blows warm braw; From dry operating midway stop the energising to above-mentioned heating arrangements, purge port air-supply or blow warm braw from above-mentioned.

7. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Make the wind speed of above-mentioned rear purge port slower than the wind speed of above-mentioned front purge port.

8. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Above-mentioned suction inlet is arranged on the position of separating with above-mentioned rear purge port across the rotating shaft of above-mentioned swing roller.

9. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Above-mentioned wind is arranged to the outer surface near above-mentioned water jacket from switching mechanism to the air channel of purge port above-mentioned.

10. according to the described washing dryer of claim 3 or 4, it is characterized in that,

Above-mentioned suction and discharge switching mechanism or suction mechanism are arranged on the top in above-mentioned casing.

11. a drying machine possesses: the swing roller of accommodating laundry; Drive the motor of this swing roller; The water jacket that holds above-mentioned swing roller; Support the casing of this water jacket; And, to the drying device that blows warm braw in above-mentioned swing roller, it is characterized in that,

Above-mentioned drying device has: from the suction inlet air amount of the back side that is arranged at above-mentioned swing roller, blow warm braw from the front side of above-mentioned swing roller and make the first dry path of warm braw circulation; And the suction extraneous air, the second dry path that blows warm braw and the air in above-mentioned swing roller is discharged to above-mentioned casing from above-mentioned swing roller rear side,

The switching mechanism that also there is switching the above-mentioned first dry path and the second dry path.

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