JP2008125806A - Drum type washer / dryer - Google Patents

Abstract

【Task】
In order to improve drying, it is necessary to apply warm air as uniformly as possible to the laundry.
[Solution]
In order to solve the problem, the present invention causes the vent to deviate from the center, so that when the normal rotation and reverse rotation are performed at the same rotational speed, a deviation occurs with respect to the blowing position of the blower. In order to eliminate this deviation, when rotating to the vent side in the direction deviated from the upper surface of the vertical position, the rotational speed should be higher than when the vent hole is provided at the upper position of the vertical position, and lower when rotating in the reverse direction. Thus, a drum-type washing / drying machine in which the air blown from the blower opening is uniformly applied to the laundry is provided.
[Selection] Figure 8

Description

  The present invention relates to a drum type laundry dryer in which the drying of laundry in the drying process is improved.

  In the drum type washing and drying machine, a drum type washing and drying machine that rotates the rotating drum forward and backward during drying to reduce the number of rotations is described in Japanese Patent Laid-Open No. 2003-251098 (Patent Document 1).

JP 2003-251098 A

  In the drum type washing and drying machine, there is a water supply port for supplying cleaning water to the entrance side of the rotating drum, and the water supply port occupies the central part in order to uniformly apply the cleaning water to the laundry, so the ventilation port is shifted from this. Can be installed in different positions. In the drying process, by rotating the rotating drum, the laundry in the rotating drum is floated and the warm air heated by the heater is blown to efficiently evaporate the moisture of the laundry, and the moisture is dehumidified and dried by the water-cooled dehumidifier. At this time, in order to improve drying, it is necessary to apply warm air as uniformly as possible to the laundry.

  In order to solve the problem, the present invention causes the vent to deviate from the center, so that when the normal rotation and reverse rotation are performed at the same rotational speed, a deviation occurs with respect to the blowing position of the blower. In order to eliminate this deviation, when rotating to the vent side in the direction deviated from the upper surface of the vertical position, the rotational speed should be higher than when the vent hole is provided at the upper position of the vertical position, and lower when rotating in the reverse direction. Thus, a drum-type washing and drying machine is provided in which the air blown from the air blowing port is uniformly applied to the laundry.

  According to the present invention, it is possible to uniformly apply warm air to the laundry even if the ventilation port is located at a position shifted from the upper surface position of the vertical position, so that drying can be improved.

  Hereinafter, examples according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a drum type washing and drying machine according to an embodiment of the present invention. On the upper part of the base 1, an outer frame 2 constituted by a steel plate and a resin molded product is placed. A door 3 for taking in and out the laundry is provided in front of the outer frame 2, and an opening / closing operation is performed by a push button switch 4. The door 3 is composed of a resin molded product whose outside is a design part and a heat resistant glass door on the inside. A drain hose fixing hole 5 is provided on the side surface of the outer frame 2. A plurality of handles 6 are provided for carrying and moving the main body. A detergent tray 7 and a drying filter 8 are attached to the left and right of the upper surface of the outer frame 2. An operation unit 9 and a display unit 10 are provided between them. Further, a drain hose 11 is drawn out from the side surface of the base 1, and legs 12 into which rubber is inserted are arranged at the four corners at the bottom.

  FIG. 2 relates to an embodiment of the present invention, and shows a longitudinal sectional view of a drum type washing machine. An outer tub 20 is provided inside the outer frame 2. The lower part of the outer tub 20 is supported by a plurality of suspensions 21, and the upper part is supported by two tension springs 22 and 23 arranged at the front and rear. The suspension 21 supports the entire weight of the outer tub 20 and has a strong structure. Further, a damping mechanism or the like is provided for absorbing the vertical vibration of the outer tub 20 generated during the dehydration operation and preventing abnormal vibration due to resonance of the outer tub 20 at the start of dehydration. In addition, the tension springs 22 and 23 supported from the upper part of the outer tub 20 are provided to prevent the outer tub 20 from collapsing in the front-rear direction and to reduce vibrations before and after the dehydration, up and down, and left and right. .

  When it is easy to wash, it is connected to the water supply electromagnetic valve 25 from the water supply hose 24 connected to the tap of the water supply, and it is necessary to wash too easily from the water injection hose 26 via the detergent charging case 27 by the operation of the water supply electromagnetic valve 25. Water is supplied. The supplied water is stored as washing water at the bottom of the outer tub 20 and as rinsing water at the time of rinsing. In the detergent charging case 27, a detergent necessary for washing is charged, and a softening finish for improving the finish is charged when rinsing. At the time of washing, the water supplied from the water injection hose 26 is introduced from the upper part of the outer tub 20 through the flexible hose 28 while dissolving the detergent in the detergent introduction case 27.

  The rotating drum 29 inside the outer tub 20 has the laundry 30 put in with the door 3 opened, and the outer periphery of the opening of the rotating drum 29 reduces vibration due to unbalance due to the laundry 30 during dehydration. A fluid balance 31 is provided. The fluid balance 31 is divided into a plurality of passages 31a in the radial direction. The passage 31a is filled with fluid at about 30 to 50%. The passage 31a is provided with ribs (not shown) in the radial direction so that the fluid does not flow freely in the circumferential direction without resistance. As the liquid filled in, a fluid in which sodium chloride, potassium chloride, calcium chloride or the like is used as an aqueous solution is used as a material that has a high specific gravity and does not decay. These fluids are filled about 30 to 50% of the volume of the passage 31a, and a saturated aqueous solution is used. Also, the inner side of the fluid balance 31 is provided with a circumferential rib 31b in the depth direction from the front surface with a gap from the rotary drum 29, and is in direct contact with the fluid filling portion of the fluid balance 31 when the laundry 30 is taken out. It has a structure that makes it difficult to touch the metal part of the rotating drum 31.

  Inside the rotating drum 29, a plurality of dewatering holes 32 for dewatering moisture contained in the laundry 30 at high speed during dehydration are provided on the entire circumference. A plurality of lifters 33 are provided inside the rotary drum 29 so that the laundry 30 can be lifted up during washing. The rotating drum 29 is directly connected to a drum driving motor 36 via a main shaft 35 connected to a rotating drum metal flange 34.

  The drum drive motor 36 is attached to a metal flange 37 fixed to the outer tub 20. In this embodiment, the drum drive motor 36 is a magnet-embedded inner rotor and the stator uses a DC brushless motor having concentrated windings.

  A rubber bellows 38 made of an elastic body is attached to the opening of the outer tub 20. The door 3 is composed of a transparent resin molded product 39 and heat resistant glass. The bellows 38 is provided so as to be in direct contact with the outer peripheral surface 40 a of the seal portion of the heat-resistant glass 40 of the transparent resin molded product 39 and the heat-resistant glass 40 constituting the door 3. It plays a role in maintaining watertightness. This prevents water leakage during washing, rinsing and dehydration. Since the door 3 is sandwiched and fixed between the heat-resistant glass 40 and the transparent resin molded product 39, a collar portion 40b is provided on the entire periphery, and the inner end surface 40c thereof is disposed so as not to wrap around the fluid balance 31 in the axial direction. Yes. Thereby, the space for storing the laundry 30 can be secured as much as possible.

  Water that has become unnecessary after being rinsed easily or water that has been dehydrated from the laundry 30 during dehydration is drained from the drainage hose 11 by opening the drain valve 41.

  In drying, since the air blown by the blower fan 42 passes through the inside and the outer periphery of the rotary drum 29 containing the laundry 30, it contains a waste thread and must be passed through the drying filter 8. For this reason, although the path is not illustrated, the air is blown to the heater 43 via the drying filter 8, and the heated hot air is blown into the rotary drum 29 from the blower opening 44 provided in the upper part of the outer tub. . The warm air passes through the laundry 30 and is dehumidified by the dehumidifying device 45 through the ventilation port 46 of the dehumidifying device 45 provided in the bottom of the outer tub 20 from the rear part of the rotating drum 29, and is repeatedly circulated by the blower fan 42. 30 is dried. The rotary drum 29 is made of a stainless steel plate, and the front body plate portion 47 is folded inward in the axial direction with a front portion plate 48 having a U-shaped outer periphery on the end surface portion, and is fastened and fastened. Yes. Thereby, the intensity | strength of the entrance side of the rotating drum 29 can be raised. Moreover, since the centrifugal force in the outer peripheral direction can be received by the rotating drum by inserting the fluid balance 31 in the meantime, the strength of the fluid balance 31 can be reduced, so that the material cost constituting the fluid balance 31 can be reduced.

Further, assuming that the length of the rotary drum 29 is L and the outer shape is D, in this embodiment, D> L. Thereby, if it is the same volume, since L dimension, ie, a depth dimension, becomes small, the ventilation from the ventilation port 44 can blow well to the back.

  FIG. 3 relates to the embodiment of the present invention, and is a block diagram showing an operation process of the drum type washing machine. In this operation process, the dirt attached to the laundry 30 is removed, the detergent component by rinsing is rinsed, the water contained in the laundry 30 is dehydrated by centrifugal force due to the high-speed rotation of the rotary drum 29, A general automatic washing course that automatically performs a series of steps such as draining the water is shown in this block diagram.

  Each step will be described below based on the block diagram. Water supply 50 is performed by operating the water supply electromagnetic valve 25. In the washing step 51, when water necessary for washing is supplied into the outer tub 20, the drum driving motor 36 rotates and the rotating drum 29 rotates. The rotation speed of the rotating drum 29 at this time is 40 to 50 rotations per minute, and the laundry 30 is lifted up by the lifter 33 in the rotating drum 29 by performing a right rotation and a left rotation every few minutes with a pause. While washing by tapping.

  When the washing process 51 is completed, the dirt attached to the laundry 30 is removed by washing, and the process proceeds to a draining process 52 for discharging dirty washing water to the outside of the washing machine. After the drainage is completed, the process proceeds to a dehydration step 53 for dehydrating the detergent contained in the laundry 30.

  In the dewatering step 53, the rotating drum 29 is rotated at a high speed, and the laundry 30 is dewatered from the plurality of dewatering holes 32 provided on the inner wall of the rotating drum 29 by centrifugal force. The number of rotations at this time is 800 to 1500 rotations per minute. When the dehydration process 53 is completed, the detergent contained in the laundry 30 is rinsed and the process proceeds to the rinsing process 54.

  Before entering the rinsing step 54, fresh water necessary for supplying fresh water is supplied into the outer tub 20 in the water supply step 50 for supplying fresh water in the same manner as the washing step 51. In this embodiment, 25 to 30 liters of fresh water necessary for rinsing is supplied as in the case of washing. When a specified amount of fresh water is supplied, the process automatically proceeds to the rinsing process 54, and the detergent contained in the laundry 30 while the rotating drum 29 rotates at a low speed (around 45 rotations per minute) as in the washing process. Remove minutes. In this embodiment, the rinsing is performed twice, but the number of times of the rinsing step 54 is two to three. After the rinsing step 54 is completed, drainage is performed and the final dehydration step 55 is entered to sufficiently dehydrate the moisture contained in the laundry 30.

  The dewatering time of the final dewatering step 55 is generally 5 minutes or longer, and the rotating drum 29 is rotated at a high speed to remove the moisture of the laundry 30 by centrifugal force. The dehydration rate at this time is 60 to 65%. In the drum type washing and drying machine, warm air is circulated in the tank by the heater 43 as a heat source, and the process automatically proceeds from washing to drying. In this case, after the final dehydration process 55 is completed, the process automatically proceeds to the drying process 56.

  In the drying step 56, after the moisture of the laundry 30 has been sufficiently removed, the rotary drum 29 is reversed or rotated in one direction at 40 to 50 revolutions per minute while blowing warm air to the laundry 30 by the heater 43. 30 moisture is removed and dried. In order to shorten the drying time, it is necessary to increase the number of revolutions in the final dehydration step 55 to increase the dehydration rate, and the maximum is 1500 revolutions per minute. Thereby, although it depends on the diameter of the rotating drum 29, the dehydration rate is about 70%. In the drying process, there is a cooling process 57 after the completion of the process. Cooling is performed by circulating cooling air in the rotary drum 29. When the temperature is lowered to a predetermined temperature, the push button switch 4 is pressed to release the lock, and the door 3 is opened. The laundry 30 can be taken out by opening. Similarly, when it is desired to stop the drying in the middle of drying, the temperature in the rotating drum is about 80 to 100 ° C. Therefore, it is opened by the cooling step 57 after the temperature is lowered to 60 ° C. or less. Yes.

FIG. 4 relates to an embodiment of the present invention, and shows a circuit for driving a drum type washing machine. The AC 100V commercial power supply 60 enters the filter circuit 64 through the outlet 63 through the fuse 63 arranged in parallel with the power switch 62. From the back of the filter circuit 64, power is directly supplied to various electrical components and the rectifier circuit 65. A switching power supply 66 and an inverter circuit 67 for supplying a low-voltage DC power supply are connected from the rectifier circuit 65. In addition, a voltage detection circuit 68 and a fuse 69 are connected between them. The inverter drive circuit 70 controls the inverter drive circuit 67 by the signal of the rotational position sensor 71 attached to the drum drive motor 36 to rotate the drum drive motor 36.

The entire drum type washing machine is controlled by the microcomputer 72. Electric components directly driven by the commercial power source 60 include a water supply electromagnetic valve 25 and a drain valve 41, which are performed by controlling the current flowing through the relay winding 74 by the microcomputer 72 through the relay contacts 73 connected in series to each other. . Further, the blower fan 43 used in the drying process and the circulation pump motor 76 used at the time of washing and rinsing use the same inverter circuit 77 with the changeover switch 78 being used. For this reason, a circuit can be shared and cost can be reduced. The heater 43 is connected in parallel with a heater having the same capacity, and the power source is taken from the front of the filter circuit 64. This is because the heater 43 is a pure resistor, so that it is not necessary to pass through the filter circuit 64, and the heater 43 has a large current, so that it is used before the filter circuit 64 to reduce the inductance capacity.

  The current flowing through the drum driving motor 36 is detected by the current detection circuit 79 on the DC side. Thereby, the cloth amount sensing means determines the cloth amount by detecting the current of the motor when the rotary drum 29 is rotated. In the case of this embodiment, the maximum capacity during washing is 9 kgf, and each level is displayed in four levels with a range. The maximum capacity when drying is 7 kgf, and the display is divided into 8 equal parts every 1 kgf.

  FIG. 5 relates to another embodiment of the present invention, and shows a partial view of the outer tub 20 as viewed from the front. In the present embodiment, the position of the air blowing port 44 is provided at a position shifted from the vertical position upper surface 80 by 50 degrees clockwise. The warm air blown out from the vent hole 44 is in a shaded area 81. The reason why the range is widened downward is that the blower pipe (not shown) comes from above, so that the speed component on the lower side is large. In particular, since the wind speed is high near the outlet 82 of the ventilation opening 44, drying is improved when it hits the laundry.

FIG. 6 relates to the embodiment of the present invention, and shows a fall trajectory of the laundry 30 when the rotating drum 29 is rotated in the counterclockwise direction by changing the number of rotations. The trajectory A is 30 to 40 rotations per minute, the trajectory B is 40 to 50 rotations, and the trajectory C is 50 to 60 rotations. This trajectory varies depending on the height of the lifter 33 inside the rotating drum 29, the outer dimensions of the rotating drum 29, and the amount of cloth. When the height of the lifter 33 increases, the lifter 33 moves upward even at the same rotational speed. When the outer dimension of the rotary drum 29 is increased, the peripheral speed is increased even at the same rotational speed, so that the rotary drum 29 is also moved upward. If the amount of cloth increases, it will collapse when it is lifted by the lifter 33, so it moves to the lower side. In addition, since the locus | trajectory B located in the area | region 81 of a diagonal line is the part with the strongest 1st wind speed, since the time which the air blows on the laundry is long, drying can be improved. The rotational speed of the locus B at this time is N2.

  FIG. 7 relates to the embodiment of the present invention, and shows a fall trajectory of the laundry 30 when the rotating drum 29 is rotated by changing the number of rotations in the clockwise direction. The trajectory D represents 30 to 40 revolutions per minute, the trajectory E represents 40 to 50 revolutions, and the trajectory F represents 50 to 60 revolutions. Among these trajectories, the trajectory E and the trajectory F have substantially the same length of the shaded area 81, but the trajectory F passing through the vicinity of the outlet 82 where the wind speed is high can improve drying.

  That is, in the drum type washing and drying machine provided with the ventilation port 44 whose position of the air blowing port 44 is shifted from the vertical position upper surface 80 in the clockwise direction, when rotated counterclockwise, the rotational speed of the trajectory B is 40 to 60 minutes per minute. When rotating clockwise by 50 rotations, drying at the time of drying can be improved by setting the trajectory F to 50 to 60 rotations per minute, regardless of whether the rotation is forward rotation or reverse rotation. The rotational speed of the locus F at this time is N1. That is, if the rotational speed when the air outlet is shifted from the upper surface of the vertical position and rotated in the shifted direction is Ncw, and the rotational speed when rotated in the opposite direction is Nccw, Ncw> Nccw, Drying efficiency can be improved due to good wind.

In actual drying, it is necessary to improve the wrinkle of the laundry 30. For this, it is more likely that the laundry 30 is tangled when the forward rotation and the reverse rotation are the same than when the rotation speed is changed in the rotation direction. First, it may be uniformly stirred. When the forward rotation and the reverse rotation are operated at the same rotational speed, the falling trajectory of the laundry 30 is the trajectory B and the trajectory E. When comparing the two, the trajectory B is better for drying the laundry 30. For this reason, it is possible to improve the drying efficiency by making the operation time on the locus B side longer than that on the locus E side. In this embodiment, the rotation time on the locus B side, that is, the Nccw side is set to 70 seconds, and the rotation time on the locus E side, that is, the Ncw side is set to 56 seconds. The rotational speed of the rotary drum is 40 to 50 revolutions per minute. The ratio of these times is Nccw: Ncw = (1.2 to 1.4): 1.
If the operation time of Nccw is made too long, soot will increase at the time of drying.

  FIG. 8 relates to the embodiment of the present invention, and shows a partial cross-sectional view when the rotary drum 29 is cross-sectioned on the axis. The rotating drum 29 is attached obliquely with respect to the horizontal axis, and θ = 10 degrees in this embodiment, assuming that the angle is θ. The value of θ is usually in the range of 0 to 30 degrees. When the value of θ is large, the cleaning power due to the drop applied to the laundry 30 is reduced, but the driving torque for driving the rotating drum is low, so that the balance between the two is determined.

  The axial range 85 of the hot air blown out from the blower port 44 includes the bottom surface 86 of the rotating drum 29 as shown by the hatched range. Thereby, the laundry 30 in the corner | angular 87 of a bottom part can be dried efficiently.

  In this embodiment, D> L, where D is the outer diameter of the rotating drum 29 and L is the length. If D> L, the length L, that is, the depth dimension can be reduced if the volume is the same. Therefore, even if the angle θ is small, the air can be blown to the bottom surface 86.

  When there is a certain amount of cloth at the time of drying, by rotating the rotating drum 29 forward and backward, the laundry 30 can be replaced even before and after and the warm air can be applied uniformly to some extent. However, if the rotary drum 30 is rotated at the same rotational speed when drying is performed when the amount of cloth is extremely small, the laundry 30 is raised to the position of the fall height Q of the bottom face 86 and then the corner 87 of the bottom face portion. Fall into position. For this reason, the time during which warm air is applied to the laundry 30 is shortened and the drying efficiency is lowered. For this reason, when the amount of cloth is small, the rotation efficiency of the rotating drum 29 is decreased so that the falling height R of the laundry 30 is reached, and the drying time is improved by extending the time that the warm air is applied to the laundry 30. it can.

  That is, the rotating drum 29 is inclined at the minimum when the amount of cloth is judged by the cloth amount sensing means at the time of washing and drying, so that the laundry 30 is small, so that it accumulates at the corner 87 of the bottom portion. Therefore, it is preferable to reduce the rotation speed of the rotary drum 29 so that the rotation speed becomes the upper surface portion of the axial range 85 of the warm air. However, since the laundry 30 becomes a lump, the laundry 30 is diffused. The number of rotations. In this embodiment, the rotational speed range at the rated capacity is 50 to 60 revolutions per minute, and the rotational speed range at the minimum dry capacity is 35 to 45 revolutions per minute.

1 is a perspective view of a drum type washing and drying machine according to an embodiment of the present invention. The longitudinal cross-sectional view of the drum type washing-drying machine which concerns on the Example of this invention is shown. It is a block diagram which concerns on the Example of this invention and shows the driving | operation process of a drum type washing machine. The circuit which drives a drum-type washing machine according to the embodiment of the present invention is shown. The partial figure which concerns on the other Example of this invention and looked at the outer tank 20 from the front is shown. FIG. 4 is a diagram illustrating a fall trajectory of the laundry 30 when the rotation of the rotary drum 29 is changed in the counterclockwise direction according to the embodiment of the present invention. FIG. 7 relates to the embodiment of the present invention, and shows a fall trajectory of the laundry 30 when the rotating drum 29 is rotated by changing the number of rotations in the clockwise direction. FIG. 4 is a partial cross-sectional view of an embodiment of the present invention when the rotary drum 29 is cross-sectioned along the axis.

Explanation of symbols

20 Outer tub 29 Rotating drum 30 Laundry 42 Blower fan 43 Heater 44 Blower port 45 Dehumidifier 48 Front plate 51 Washing process 53 Dehydration process 54 Rinse process 56 Drying process 57 Cooling process 80 Vertical position upper surface 86 Bottom surface

Claims (3)

  In a drum-type washing and drying machine equipped with a blower opening that blows warm air into the rotating drum during the drying process provided in the range of ± 90 degrees from the upper surface of the vertical position on the entrance side of the outer tub, the blower opening is shifted from the upper surface of the vertical position. If the rotational speed when rotating in the shifted direction is Ncw, and the rotational speed when rotating in the opposite direction is Nccw, Ncw> Nccw and the forward / reverse rotation is performed alternately or forward and backward after a plurality of rotations. Drum-type washing and drying machine.   In the drum type washer / dryer provided with the air outlet and the cloth amount sensing means for blowing warm air into the rotating drum during the drying process provided in the range of ± 90 degrees from the upper surface of the vertical position on the entrance side of the outer tub, the upper surface of the vertical position When the rotational speed when rotating in the shifted direction is Ncw and the rotational speed when rotating in the opposite direction is Nccw, the same rotational speed is set, and the rotational time on the Nccw side is made longer than Ncw. A drum-type washing and drying machine characterized by that.   At the entrance side of the outer tub, it has an air outlet and cloth amount sensing means for blowing warm air into the rotating drum in the range of ± 90 degrees from the upper surface of the vertical position, and the rotating drum is slanted with the front side up And has a blower opening for blowing warm air into the rotating drum during the drying process provided in the range of ± 90 degrees from the upper surface of the vertical position on the entrance side of the outer tub. The length of the rotating drum is L, and the outer shape is When D, D> L, and the axial range of the hot air at the air outlet is lower in the drum type washer / dryer including the bottom surface of the rotating drum than when the amount of cloth is small compared to when the amount is large. Drum type washer-dryer.

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