JP5450724B2 - Dryer - Google Patents

Description

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

  Drying clothes with a washing and drying machine that can perform washing to drying continuously creates high-temperature and low-humidity air with a blower fan and heat source, blows it into the washing tub, raises the temperature of the clothes, and moisture from the clothes By evaporating and evaporating the evaporated water. There are two methods for removing the evaporated water: an exhaust system that discharges it directly outside the washing and drying machine (always supplying new air) and a dehumidification system that cools the evaporated water and condenses it to remove the water (circulates the same air). However, for home use, a dehumidification system that does not allow moisture to enter the room where the washing and drying machine is installed is often used.

  The laundry dryer has (1) short drying time, (2) low power consumption, (3) good drying finish (low wrinkle of clothing), and (4) little damage to clothing. That is required. Among these, regarding (1) and (2), there is a washing and drying machine that efficiently performs drying by appropriately controlling the air volume and temperature of air according to the progress of drying. In addition, there is a washing and drying machine that improves the movement of clothes in the washing tub and efficiently evaporates moisture from the clothes. Furthermore, there is a washing / drying machine that uses a water cooling system as a dehumidifying system to increase the efficiency of heat exchange with hot and humid hot air by allowing cooling water to flow uniformly over the wall surface of the air passage. Regarding (4), there is a washing and drying machine provided with a low temperature drying course in which the temperature of the warm air is limited so that the temperature of the clothes does not rise too much (the heater input is suppressed). Regarding (3), since wrinkles are generated when clothes are entangled or twisted during drying, there are washing dryers that are less likely to cause tangling or twisting of clothes.

JP 62-44299 A JP-A-9-774 JP-A-2005-080946 JP 2002-346272 A

  Even if there is no entanglement or twisting, if the amount of clothing increases with respect to the volume of the dryer, the clothing cannot spread sufficiently, so that the clothing is dried while being folded and wrinkles are generated. As an example, FIG. 17 shows a photograph of clothing (cotton pajamas trousers) when 2 kg of clothing is dried by a commercially available clothing dryer (three types of drum volumes 62L, 77L, and 99L). It can be seen that the wrinkle decreases as the drum volume increases. In this way, it has been known that wrinkles can be reduced as the volume increases. However, in home-use washer / dryers, washing / drying is limited due to the size of the installation location and restrictions on the delivery path (corridor and door) to the installation location. There was a limit to the size of the machine, and it was difficult to ensure a sufficient volume. For this reason, clothing that cares about the finish of drying is separated from other general clothing, and there is only a method of drying by reducing the amount of clothing. However, it is not realistic to perform time-consuming drying several times, and such clothes are dried by hanging and many people do not use a dryer.

  An object of the present invention is to provide a dryer having an improved finish of drying without increasing the volume of the drum.

In order to achieve the above object, the features of the dryer of the present invention are:
Consists of a blower unit, a hot air blowout port provided on the discharge side of the blower unit, and an air passage connecting them, and during the drying operation, a means for blowing wind on clothes stored in the rotating drum is provided, A turbo fan is used for the blower unit, a plurality of the hot air outlets are provided, a switching valve for switching the plurality of hot air outlets is provided, an inlet provided in the outer tub, and connected to the inlet The air passage has a dehumidifying mechanism, air sucked from the common intake port is dehumidified by the dehumidifying mechanism, the dehumidified air is supplied to the blower unit, and the warm air sent from the turbofan is It is switched by a switching valve, and is blown into the rotary drum from any one of the plurality of hot air outlets .

  Since the dryer configured in this way is provided with a plurality of nozzles, it is possible to use an appropriate nozzle according to the rotation of the drum during the drying operation or to appropriately control the strength of the output of the plurality of nozzles. It is more effective to prevent the wrinkle at the time of drying by blowing air on the surface.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a drum type washing / drying machine according to an embodiment of the present invention. FIG. 2 is a perspective view showing a part of the casing cut off to show the internal structure, FIG. 3 is a rear view with the back cover removed to show the internal structure, and FIG. 4 shows the internal structure. FIG. 5 is a side view, and FIG. 5 is a plan view showing a part of the housing cut away to show the internal structure.

  Reference numeral 1 denotes a housing constituting the outer shell. The housing 1 is mounted on a base 1h, and includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d, a top cover 1e, and a lower front cover 1f. The left and right side plates 1a and 1b are joined by a U-shaped upper reinforcing material (not shown), a front reinforcing material (not shown), and a rear reinforcing material (not shown). A box-shaped housing 1 is formed and has sufficient strength as a housing.

  9 is a door which closes the insertion port for putting in and taking out the clothes provided in the approximate center of the front cover 1c, and is supported by the hinge provided in the front reinforcement material so that opening and closing is possible. When the door opening button 9d is pressed, the lock mechanism (not shown) is released to open the door, and when the door is pressed against the front cover 1c, the door is locked and closed. The front reinforcing member has a circular opening for putting clothes in and out concentrically with an opening of the outer tub described later. The part which closes the outer tank opening part of the door 9 is made from the concave glass 9a so that it can endure the heat at the time of drying.

  Reference numeral 6 denotes an operation panel provided in the upper center of the housing 1 and includes a power switch 39, operation switches 12 and 13, and a display 14. The operation panel 6 is electrically connected to a control device 38 provided at the lower part of the housing 1.

  3 is a cylindrical washing and dewatering tub (rotary drum) supported rotatably, having a large number of through holes for water flow and ventilation on the outer peripheral surface 3e and the back surface 3d, and clothing on the front end surface Is provided with an opening 3a. A fluid balancer 3c integrated with the washing and dewatering tub 3 is provided outside the opening 3a. A plurality of lifters 3b extending in the axial direction are provided inside the outer peripheral surface 3e. When the washing and dewatering tub 3 is rotated during washing and drying, the clothes are lifted along the outer peripheral surface 3e by the lifter 3b and centrifugal force, and gravity Repeat the movement as if falling. The rotation center axis of the washing and dewatering tub 3 is inclined so that the horizontal or opening 3a side becomes higher.

  Reference numeral 2 denotes a cylindrical outer tub, which coaxially encloses the washing / dehydrating tub 3, opens on the front surface, and attaches the motor 4 to the outer center of the rear end surface. The rotating shaft of the motor 4 passes through the outer tub 2 and is connected to the washing and dewatering tub 3. An outer tub cover 2d is provided at the opening on the front surface, and water can be stored in the outer tub. In the center of the front side of the outer tub cover 2d, there is an opening 2c for taking in and out clothing. The opening provided in the main opening 2c and the front reinforcing member 37 is connected by a rubber bellows 10. When the door 9 is closed, the glass 9a of the door 9 comes into contact with the lip of the bellows 10, and the outer tank 2 is sealed with water. Moreover, when the door 9 is closed, the tip of the concave glass 9a closes the opening 2c of the outer tub cover 2d, but the tub sinks due to the sinking of the outer tub 2 during washing or the vibration of the outer tub 2 during dehydration. The outer periphery of the glass 9a and the tank cover 2d have a gap so that the cover 2d and the glass 9a do not contact each other. The size of the gap is taken into consideration so that the laundry does not enter the gap.

  A drain port 2b is provided at the bottom bottom of the outer tub 2 and a drain hose 26 is connected thereto. A drain valve (not shown) is provided in the middle of the drain hose 26. Water is stored in the outer tank 2 by closing the drain valve and supplying water, and the drain valve is opened to drain the water in the outer tank 2 outside the machine. To discharge.

  The outer tub 2 is supported in a vibration-proof manner by a suspension 5 (consisting of a coil spring and a damper) whose lower side is fixed to the base 1h. The upper side of the outer tub 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member, and prevents the outer tub 2 from falling in the front-rear direction.

  Reference numeral 19 denotes a detergent container provided on the upper left side in the housing 1, and a drawer-type detergent tray 7 is mounted from the front opening. When putting detergents, the detergent tray 7 is pulled out as shown by a two-dot chain line in FIG. The detergent container 19 is fixed to the upper reinforcing material of the housing 1.

  On the rear side of the detergent container 19, components related to water supply such as a water supply electromagnetic valve 16, a bath water supply pump 17, a water level sensor (not shown) are provided. The top cover 1e is provided with a water supply hose connection port 16a from a water tap and a water absorption hose connection port 17a for remaining hot water in the bath. The detergent container 19 is connected to the outer tub 2 and supplies washing water to the outer tub 2 by opening the water supply electromagnetic valve 16 or operating the bath water supply pump 17.

  Reference numeral 29 denotes a drying duct installed vertically inside the back surface of the housing 1, and a lower portion of the duct is connected to an intake port 2 a provided below the back surface of the outer tub 2 by a rubber bellows tube B 29 a. A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 29, and cooling water is supplied from the water supply electromagnetic valve 16 to the water-cooled dehumidifying mechanism. The cooling water flows down along the wall surface of the drying duct 29, enters the outer tub 2 through the intake port 2a, and is discharged from the drain port 2b.

  The upper part of the drying duct 29 is connected to a filter duct 27 installed in the front-rear direction on the upper right side in the housing 1. The filter duct 27 has an opening on the front surface, and a drawer-type drying filter 8 is inserted into the opening. The air that has entered the filter duct 27 from the drying duct 29 flows into the mesh filter 8a of the drying filter 8, and lint is removed. 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 insertion portion of the filter 9 in the filter duct 27, and the opening is connected to the intake duct 33, and the other end of the intake duct 33 is connected to the intake port of the blower unit 28. doing.

  The blower unit 28 includes a drive motor 28a, a fan impeller (not shown), and a fan case 28b. The fan case 28b incorporates a heater 31 and heats air sent from the fan impeller. The discharge port of the blower unit 28 is connected to the hot air duct 30. The hot air duct 30 is connected to a rubber bellows tube A30a and a bellows tube joint 30b. The bellows joint 30b is divided into two forks. The lower outlet is connected to the hot air outlet 32R provided on the upper right side of the outer tank cover 2d (as viewed), and the lateral outlet is connected to the hot air duct 45. The hot air duct 45 is connected to a hot air outlet 32L provided on the upper left side (as viewed) of the outer tank cover 2d. 46 is a switching valve provided in the bellows joint 30b, and switches between the hot air outlet 32R and the hot air outlet 32L. The switching valve 46 moves as indicated by the circular arc arrow in FIG. 6, and when the valve body 46a of the switching valve 46 is made vertical (state of 46b), the warm air blows out from the hot air outlet 32R and the valve body 46a is made horizontal. (State of 46c) Warm air blows out from the warm air outlet 32L.

  Temperature sensors (not shown) are provided at the outlet 2b and the inlet and outlet of the blower unit 28.

  A feature of the present invention is to apply a high-speed wind directly to the garment and to stretch wrinkles generated in the garment by the force of the wind. For this purpose, a blower unit 28 that generates high-speed wind and a hot air outlet 32 that directly applies the wind to clothing are required.

  Details of the hot air outlets 32R and 32L will be described with reference to FIGS. In addition, since both internal structure is the same as 32R and 32L, the warm air blowing port 32R is demonstrated here. FIG. 6 is a front view of the outer tub cover 2d of the hot air outlet 32R installation portion, and FIG. 7 is a cross-sectional view of the hot air outlet 32R cut along a two-dot chain line AA in FIG.

  The hot air outlet 32R is provided along the opening 2c from the front side of the outer tank cover 2d, and the flow paths 32b and 32c are formed inside. A bellows pipe joint 30b is attached to the inlet of the hot air outlet 32R, and a nozzle 32d is formed at the outlet of the flow path 32c. The inner diameter of the opening 2c of the outer tub cover 2d and the inner diameter of the opening 3a of the washing / dehydration tub 3 are set to be substantially the same so that clothing does not enter between the gap between the washing / dehydration tub 3 and the outer tub cover 2d. Yes. For this reason, the outlet 32a of the hot air outlet 32 is formed so as to protrude inward from the inner peripheral surface of the opening 2c, and the nozzle 32d is opened toward the washing and dewatering tub 3. The nozzle 32d is located between the inner peripheral opening 3a of the balancer 3c and the door glass 9a so that the nozzle 32d can be seen from the inside of the washing and dewatering tub 3. By doing in this way, the warm air which came out of the nozzle 32d can be directly applied to the clothing in the washing and dewatering tank 3.

  With the above configuration, the examination results of air volume, wind speed, nozzle area, etc. for obtaining a satisfactory dry finish are shown below. The wind speed is a value calculated from the result of measuring the air volume pressure characteristics of the blower unit 28. The air pressure characteristics were measured with the apparatus shown in FIG. An orifice is attached to the suction port of the pressure equalizing box and the discharge port of the blower unit 28, and the air volume and the pressure of the intake port and the discharge port of the blower unit 28 are measured while varying the diameter of the orifice and the rotation speed of the motor 28a. The characteristics were determined. Then, the pressure of the air inlet and outlet of the air blowing unit 28 when the air blowing unit 28 is mounted on the washing / drying machine is measured, the air volume is obtained from the above air volume pressure characteristics, and the value obtained by dividing the air volume by the nozzle area is the air speed. It was.

  The experimental conditions are as shown in FIG. 9, and the testing machine is a drum type washing and drying machine having a washing and dewatering tank having a diameter of 600 mm and a volume of 75 L, and the amount of cloth is 2 kg. The results of the thin cotton pajamas trousers with the most wrinkles were shown, although the evaluation of the finish was carried out with various garments. The evaluation is a five-step sensory evaluation by visual inspection. FIG. 10 shows an example of the finished condition with respect to the sensory evaluation value. A nozzle is a case where the nozzle 32d is provided in the position mentioned above (position on the right upper side of the outer tank cover 2d). The blowing direction of the wind from the nozzle 32d was made to face substantially the center of the back surface 3d of the washing and dewatering tank 3. The result is an average value of three evaluators.

From FIG.
(A) The finish improves as the wind speed increases. However, the finish is saturated with respect to the wind speed, and if the wind speed is too high, the finish tends to deteriorate. Also, the greater the air volume, the lower the wind speed at which the finish is saturated. When the air volume is 0.8 m ³ / min, the sensory evaluation value is about 3 at a wind speed of about 140 m / s. When the air volume is 1.0 m ³ / min, the sensory evaluation value is about 3.3 at a wind speed of about 130 m / s, and the air volume is 1.3 m ^3. At a wind speed of 120 m / s, the sensory evaluation value is about 3.9, and at an air volume of 1.5 m ³ / min, the sensory evaluation value is about 4.0 at a wind speed of about 110 m / s, and about 100 m / s at an air volume of 1.7 m ³ / min. The sensory evaluation value is about 4.2, and the finish is hardly improved even if the wind speed is increased further. Moreover, when the air volume is 1.5 m ³ / min or more, a finish equivalent to hanging drying can be obtained.
(B) If the wind speed is the same, the finish is better when the air volume is larger. However, the improvement degree of the finish when the air volume is increased from 1.5 m ³ / min to 1.7 m ³ / min is small. For this reason, even if the air volume is increased more than necessary, it is not expected to improve the finish.

  Thus, the larger the wind speed and volume, the better the finish. It is desirable not to increase either one, but to set the balance in consideration of both. Specifically, not only the finish but also the current value (in the case of a commercial power supply for home use, the total of the blower unit 28, the heater 31, the motor 4, and the control device 38 is 15A or less), the drying performance, and the duct through which the wind circulates. It is necessary to determine the air speed and air volume in consideration of the flow area of the air and the mounting on the washer / dryer.

If the sensory evaluation value is 3 or more, it can be easily finished even when ironing after drying. If the sensory evaluation value is 4 or more, there is little dissatisfaction even if the clothes after drying are worn as they are. To the sensory evaluation value 3 or more, the air volume 0.8 m ³ / min at a wind speed of about 140 m / s or more, about 110m / s or more air flow 1.0 m ³ / min, air velocity about at air flow 1.3 m ³ / min 92m / s or more, wind speed of 1.5m ³ / min and wind speed of about 75m / s or more, air volume of 1.7m ³ / min and wind speed of about 70m / s or more, at least 0.8m ³ / min is required. . Although the air volume greatly affects the drying performance, if the air volume is too small, the drying time is extended. Therefore, the air volume is required to be 0.8 m ³ / min or more from the viewpoint of the drying performance.

In this embodiment, the nozzle area is 280 mm ² (slit shape with a width of 56 × height of 5 mm), the blower unit 28 operates at a fan impeller diameter of 140 mm, a blade thickness of 8.1 mm, and a rotational speed of 15000 revolutions per minute. doing. As a result, the fan discharge pressure is about 7000 Pa (at an air temperature of 30 ° C.), and the wind speed is about 100 m / s at an air volume of about 1.65 m ³ / min.

  In the case of clothing that is difficult to wrinkle, a finish with a sensory evaluation value of 4 or higher can be obtained even at a value lower than the above wind speed. However, it is common to dry various clothing at the same time, so that the clothing tends to wrinkle. It is better to determine the wind speed.

  The nozzle 32d has a flat slit shape as shown in FIG. The area of the nozzle 32d may be any area as long as the air volume / velocity can be obtained as described above, and may be any shape as long as the cross-sectional shape does not cause flow resistance. However, if the outlet portion 32a protrudes too much inside the opening 2c, it will interfere with the putting in and out of the clothing, and the movement of the clothing may be hindered during washing and drying. Therefore, the nozzle 32d has a flat slit shape to reduce the amount of protrusion. Further, the surface shapes of the opening 2c and the outlet 32a are smoothly changed so as not to inhibit the cloth movement.

  If the height of the nozzle 32d is too small, dust is likely to be clogged, leading to an increase in wind noise at the nozzle. Therefore, it is preferable that the nozzle 32d be at least about 3 mm. Further, the flow path 32b and the flow path 32c 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 nozzle 32d. By doing so, it is possible to reduce the pressure loss and fluid sound that occur when high-speed wind flows through the flow paths 32b and 32c.

  The flow of wind during the drying operation is as follows. When the blower unit 28 is operated and the heater 31 is energized, the warm air passes through the bellows 30a and enters the bellows joint 30b, and the flow direction is switched depending on the position of the switching valve 46. When the valve body 46a is at the position 46b, the nozzle 32d blows into the washing and dehydrating tub 3 (arrow 41R). When the valve body 46a is at the position 46c, the nozzle 32e enters the washing and dehydrating tub 3 Blow in (arrow 41L). Warm air hits wet clothing and heats the clothing, causing moisture to evaporate. During the drying operation, the washing and dewatering tub 3 is rotated forward and backward, and the switching valve is switched according to the direction of rotation, so that the clothes are lifted up to the vicinity of the nozzles 32d and 32e by the lifter 3b, The wind hits. At this time, since the distance between the nozzles 32d and 32e and the garment is the shortest, wrinkles of the garment can be stretched with a high-speed wind. The air that has become hot and humid flows from the through hole provided in the washing and dewatering tub 3 to the outer tub 2 and is sucked into the drying duct 29 from the air inlet 2a and flows from the bottom to the top in the drying duct 29 (arrow 42). Cooling water from the water cooling and dehumidifying mechanism flows down on the wall surface of the drying duct 29, and the hot and humid air is cooled and dehumidified by contacting with the cooling water, and becomes dry low temperature air and enters the filter duct 27 (arrow 43). . The lint is removed through the mesh filter 8a provided in the filter duct 27, enters the intake duct 33, and is sucked into the blower unit 28 (arrow 44). Then, it is heated again by the heater 31 and circulates so as to blow into the washing and dewatering tub 3.

  The reason why the wrinkle of clothing is reduced by applying high-speed wind to the clothing will be described with reference to FIG. FIG. 12A is a schematic diagram when the high-speed wind 41 from the nozzle 32d hits the clothing. Here, the case where there is other clothing on the back of the clothing is shown. When the wind hits the garment, the garment is forced to spread by the wind (arrow (1)), and after being struck by the garment, the direction of flow is changed and the wind flowing along the garment surface is pulled to the left and right (arrow (2)) ) Acts. The wrinkles of clothes are stretched by the force of (1) and (2). When the amount of clothes in the washing / dehydrating tub 3 is large, wrinkles are stretched mainly by the force of (1) because there are many other clothes that are difficult to move freely around the clothes directly hit by the wind. When the amount of clothing is small, the clothing moves freely, and the clothing hit by the wind looks like a windsock while being pushed in the direction of the wind, and wrinkles are caused by the force of (2) caused by the wind that flows along the surface of the clothing. Stretched. When the amount of clothing is small, the clothing spreads during drying and wrinkles are unlikely to occur, so the force (1) is considered here.

  As shown in FIG. 12B, the force F of (1) is proportional to the product of Q and V, where Q is the amount of wind blown from the nozzle 32d and V is the wind speed. If the distance between the nozzle 32d and the clothing is X, the force F is proportional to V and inversely proportional to X. However, when the distance between the nozzle 32d and the clothing is very close (from the core region of the jet, from the nozzle to a position about 6 times the nozzle diameter in the case of a circular nozzle), F is proportional to V regardless of X. Therefore, in order to increase F, the air volume Q is increased, the wind speed V is increased, or X is decreased (clothes are brought closer to the nozzle). The result of the finish shown in FIG. 9 can now be explained.

  In order to increase the air volume Q, it is necessary to increase the rotational speed of the fan of the blower unit 28, or to increase the outer diameter and blade height of the fan. Also, it is better to reduce the pressure loss by increasing the area of the duct through which the hot air passes. In particular, in the case of the water cooling method using water for dehumidification, if the flow velocity of the air flowing through the drying duct 29 is too high, a phenomenon that the cooling water is blown off by the wind occurs. When the cooling water reaches the filter 8a or the heater 31, it leads to a significant decrease in the drying efficiency. Therefore, it is essential to increase the flow path area of the drying duct 29. For this reason, when the air volume is significantly increased, the size of the duct and the blower unit increases, leading to an increase in the size of the housing 1, and it becomes difficult to install the washing and drying machine in the home.

  On the other hand, in order to increase the wind speed V, the air blowing unit 28 may be a pressure type to reduce the nozzle area. When a general turbofan is used as the blower unit 28, there are a method of increasing the diameter of the fan impeller at a low rotational speed and a method of increasing the rotational speed while keeping the diameter of the fan impeller small. High-speed rotation has the advantage that it can be mounted in the same housing as the conventional one.

  In the present embodiment, as described above, the nozzle 32d is located obliquely above and to the right of the outer tank cover 2d (approximately 45 degrees), and the nozzle 32e is located obliquely above and to the left of the outer tank cover 2d. A high-speed wind blows toward the substantial center of the back surface 3d of the washing and dewatering tub 3. While the washing and dewatering tub 3 is rotated forward and backward during the drying operation, the clothes are lifted and brought close to the nozzles 32d and 32e, and high-speed wind from the nozzles 32d and 32e is applied to the clothes. And the nozzle which blows wind is switched according to the rotation direction of the washing and dewatering tank 3. FIG. 13 is a schematic view showing the movement of clothes in the washing and dewatering tub 3 indicated by arrows at this time. FIG. 13A shows a case where the washing / dehydrating tub 3 is rotating clockwise, and FIG. 13B shows a case where the washing / dehydrating tub 3 is rotating counterclockwise.

  In the case of right rotation (looking toward), the valve body 46a of the switching valve 46 is made horizontal (46c) so that warm air is blown from the upper left nozzle 32e. In the case of counterclockwise rotation (when viewed from the top), the valve body 46b is made vertical (46b) so as to blow warm air from the upper right nozzle 32d. It should be noted that the operation of the switching valve 46 is performed during the time since the rotation of the washing / dehydrating tub 3 is temporarily stopped when the rotation direction of the washing / dehydrating tub 3 is changed.

  If it does in this way, the clothes in the washing and dewatering tub 3 will move as shown by the thick arrows in the figure. That is, in the right rotation, the high-speed wind 41L is hit before the clothes are lifted and reach the top. Since clothing has an upward speed, it falls after being swung rightward on the upper side of the washing and dewatering tub 3 by being hit by wind (FIG. 13a). In the counterclockwise rotation, on the other hand, when the wind 41R hits, the clothes are swung leftward on the upper side of the washing and dewatering tub 3 and then dropped (FIG. 13b). For this reason, wind is sufficiently applied to the clothes, the clothes are easy to spread, and the volume of the washing and dewatering tank 3 can be used effectively, so that the finish is improved.

  On the other hand, if the upper right nozzle 32d is used during right rotation, since the high-speed wind 41R is blown where the garment is lifted and begins to fall, the garment suddenly falls as indicated by the thick arrow indicated by the broken line. To do. For this reason, the high-speed wind does not sufficiently hit the clothing, and the effect of stretching wrinkles is reduced. In addition, since there is a portion where clothing is difficult to go on the upper right side of the washing / dehydrating tub 3, it is equivalent to the apparent decrease in the volume of the washing / dehydrating tub 3, the clothing is difficult to spread, and the finish is slightly inhibited. .

FIG. 14 is an example of the finished sensory evaluation value when the present embodiment and one nozzle (nozzle 32d) are used. Experimental conditions are as shown in the figure. (A) to (C) are cases where there is one nozzle, and (D) is the case of the embodiment of the present invention. (A) has the same left-right rotation time of the washing and dewatering tub 3, and the emotion evaluation value is about 3.5. (B) and (C) are the cases where the rotation time of the left rotation with good cloth movement when the nozzle 32d is used is longer than the right rotation. By adjusting the rotation time ratio as in (B), the finish can be improved to a sensory evaluation value of about 3.9. However, if the difference between the left rotation time and the right rotation time is too large, the sensory evaluation value becomes about 3.1 as shown in (C), and the finish deteriorates. This is because clothing is likely to get entangled if the rotation time of one side is too long. On the other hand, in (D), the sensory evaluation value was improved to about 4.2.

  FIG. 15 is a block diagram of the control device 38 of the washing / drying machine. A microcomputer 50 is connected to the operation button input circuit 51, the water level sensor 34, and the temperature sensor 52 connected to the switches 12, 13, 13a, and various information signals in the user's button operation, washing process, and drying process. Receive. An output from the microcomputer 50 is connected to a drive circuit 54 and connected to a water supply electromagnetic valve 16, a drain valve 25, a motor 4, a blower fan 28, a heater 31, and the like, and controls opening / closing, rotation, and energization thereof. Further, it is connected to a 7-segment light emitting diode display 14, a light emitting diode 56 and a buzzer 57 for notifying the user of the operating state of the washing machine.

  The microcomputer 50 is activated when the power switch 39 is pressed and the power is turned on, and executes a basic control processing program for washing and drying as shown in FIG.

Step S101
Check the status of the washer / dryer and make initial settings.

Step S102
The indicator 14 of the operation panel 6 is turned on, and a washing / drying course is set according to an instruction input from the operation button switch 13. When no instruction is input, the standard washing / drying course or the previous washing / drying course is automatically set. For example, when an instruction is input to the operation button switch 13a, a high finishing course for drying is set.

Step S103
The process branches after monitoring the instruction input from the start switch 12 of the operation panel 6.

Step S104
Perform the laundry. Laundry is performed in the order of washing, intermediate dehydration, rinsing, and final dehydration. Since this is the same as a normal drum-type washing and drying machine, a detailed description thereof is omitted.

Step S105
The process branches after confirming whether the washing / drying course is set. When only the washing course is set, the driving is ended.

Step S106
When a washing / drying course is set, hot air dehydration is performed. In the hot air dehydration, the blower unit 28 is operated at a low speed, and the heater 31 is energized (strong mode) to blow warm air into the washing and dewatering tub 3 to increase the temperature of the clothes. At the same time, the washing and dewatering tub 3 is rotated at a high speed to effectively dehydrate moisture from the warmed clothes (the viscosity of the water decreases as the temperature rises, so that the water can be efficiently dehydrated).

Step S107
Dry operation 1 is executed. The blower unit 28 operates at a low speed, the heater 31 operates in a strong mode, repeats the forward / reverse rotation of the washing / dehydrating tub 3 and the switching of the nozzles, and changes the position of the clothes in the washing / dehydrating tub 3 while hot hot air Spray on clothing. The temperature of the entire clothing rises and moisture evaporates from the clothing.

Step S108
Check if the high finishing course is set and branch the process. In the case of a course other than the high finishing course, step S107 is performed until the drying is completed.

Step S109
The process branches after confirming whether the elapsed time from the start of drying has reached a predetermined time. The specified time is set before the dryness of the clothes (= the mass of the dry cloth / the mass of the compress) reaches 0.9.

  Drying proceeds as follows. It is important to give the garment as much heat as possible in order to raise the garment temperature quickly in the early stage of drying. During the preheating period, there is little evaporation of moisture from the clothing.

  As the temperature of the clothing rises, the evaporation of moisture from the clothing increases, so the temperature rise of the clothing becomes dull due to the heat of vaporization, and eventually the heat and the heat of vaporization balance, and the temperature of the clothing becomes almost constant (constant rate) Dry). When the moisture content of the garment decreases, the heat of vaporization decreases, and the temperature of the garment begins to rise again. When the moisture of the garment runs out, the temperature becomes almost the same as that of the warm air, and drying ends (decreasing drying). The temperature of the clothing starts to rise when the dryness reaches around 0.9.

  When the clothes contain a lot of moisture, even if the clothes are wrinkled, they can be easily repaired (it can also be seen from the fact that the wrinkled clothes can be wrinkled by spraying or steaming). However, wrinkles are fixed when drying proceeds to a dryness of 0.9 or more with wrinkles remaining. Once fixed, wrinkles can hardly be taken in subsequent processes. Therefore, it is important to stretch the wrinkles before the dryness reaches 0.9.

  At the time of actual drying, clothes of different materials and thicknesses are dried at the same time, so the time for the dryness to be 0.9 varies depending on the clothes. Therefore, in the present embodiment, the dryness of the thin cotton clothing that is most likely to be wrinkled is set to a time from about 0.8 to about 0.85. Moreover, since the time for the dryness to be 0.9 differs depending on the amount of cloth, it is needless to say that the time needs to be set according to the amount of cloth.

Step S110
Dry operation 2 is executed. While the forward / reverse rotation of the washing / dehydrating tub 3 and the switching of the nozzle are continued, the blower unit 28 is rotated at a high speed, the heater 31 is set in the weak mode, and high-speed wind is blown on the clothes in the washing / dehydrating tub 3 Dry while stretching. The reason why the heater 31 is set to the weak mode when the blower unit 28 is rotated at high speed is to prevent the allowable current value from being exceeded.

  In this step, since the heater 31 is in the weak mode, it is lower than that in step S107. Especially when the dryness exceeds 0.9, the temperature of the clothing rises and approaches the warm air temperature. However, since the warm air temperature is low, the clothing temperature can be kept low and damage to the clothing can be reduced. There are also benefits.

  Drying is performed while monitoring the temperature of the warm air or the cooling water drainage using a temperature sensor, and is finished when the rate of temperature change reaches a predetermined value.

  Note that the drying operation 2 of step S110 may be performed from the beginning without performing the drying operation 1 of step S107. As the amount of cloth increases, the rear and front clothing in the washing and dewatering tub 3 is less likely to be replaced, and the front clothing to which the warm air is blown dries quickly. Therefore, by operating the blower unit 38 at a high speed from the beginning, it is possible to prevent wrinkles from being quickly dried even if the drying speed varies greatly.

It is an external view which shows the drum type washing-drying machine of this invention. It is a perspective view which cut | disconnects a part of housing | casing of the drum type washing machine of this invention, and shows an internal structure. It is a rear view which removes the back cover of the drum type washing machine of the present invention, and shows an internal structure. It is a side view which shows the internal structure of the drum type washing machine of this invention. It is a top view which cut | disconnects the upper part of the housing | casing of the drum type washing machine of this invention, and shows an internal structure. It is a front view of the outer tank cover which provided the warm air blowing outlet. It is AA sectional drawing of the warm air blower outlet in FIG. It is an apparatus for measuring the air volume pressure characteristics of the blower unit. It is an experimental result of the finished sensory evaluation value of the clothing after wind speed and drying. It is a photograph which shows a sensory evaluation value and the finish of clothing. It is the perspective view which showed the nozzle shape of the outer tank cover seen from the inside of the washing and dewatering tank. It is a schematic diagram when the high-speed wind blown from the nozzle hits clothing. It is a schematic diagram which shows the cloth movement in the washing and dewatering tank during drying. It is an experimental result of the finished sensory evaluation value of one nozzle and two nozzles. It is a block diagram of the control system of the washing and drying machine shown in FIG. It is a flowchart which shows a part of control process which the microcomputer in the controller of the control system shown in FIG. 6 performs. It is a photograph which shows an example of the drum volume of a clothes dryer, and the clothing finishing state after drying.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Outer tank 2a Intake port 2d Outer tank cover 3 Washing / dehydration tank 3c Fluid balancer 3d Washing / dehydration tank back surface 4 Motor 6 Operation panel 8 Drying filter 9 Door 16 Water supply solenoid valve 27 Filter duct 28 Blower unit 28a Fan motor 28b Fan case 29 Drying duct 30b Bellows joint 31 Heater 32R, 32L Hot air outlet 32d, 32e Nozzle 33 Intake duct 38 Controller 45 Hot air duct 46 Switching valve

Claims (1)

A rotating drum that accommodates clothing; an outer tub that coaxially encloses the rotating drum; a motor that can rotate forward and backward and that drives the rotating drum; and a housing that supports the rotating drum, and is dried In the washing dryer to drive,
A blower unit, a hot air outlet provided on the discharge side of the blower unit, and an air passage connecting them, and a means for blowing air on the clothes housed in the rotating drum during the drying operation Using a turbo fan in the air blowing unit, providing a plurality of the hot air outlets, and a switching valve for switching the plurality of hot air outlets ,
An air inlet provided in the outer tub, and a dehumidifying mechanism in an air passage connected to the air inlet;
The air sucked from the common intake port is dehumidified by the dehumidifying mechanism, the dehumidified air is supplied to the blower unit, and hot air sent from the turbofan is switched by the switching valve to switch the plurality of temperatures. A washing / drying machine which blows out into any one of the wind outlets into the rotating drum .