JP5488397B2 - Washing and drying machine - Google Patents

Description

  The present invention relates to a washing / drying machine for controlling an unbalanced state of clothes in a drum during dehydration.

  Conventionally, this type of washing / drying machine is agitating operation to stop the rotation of the drum, stop the rotation of the drum, and supply the water to correct the unevenness of the cloth during the dehydration, in order to eliminate the unbalanced state of the clothes. Has been proposed (for example, see Patent Document 1).

  FIG. 7 shows a flowchart of the determination and response when the unbalance abnormality of the conventional drum type washing machine described in Patent Document 1.

  In FIG. 7, when the dehydration process starts in step 100, a draining operation is performed in step 101. Thereafter, in step 102, in order to loosen the laundry such as clothes that have been offset, the rotating drum is rotated forward and reverse (unwinding step) at a predetermined rotational speed (for example, about 40 rpm). Next, in step 103, the laundry is slowly raised to a predetermined rotational speed (about 70 rpm) that allows the laundry to stick to the inner surface of the rotary drum. Thereafter, in step 104, control is performed to maintain a predetermined rotation speed (for example, about 80 rpm) lower than the primary resonance rotation speed for a predetermined time.

  At this time, the rotation unevenness, that is, the presence / absence of unbalance is detected. If there is an unbalance greater than or equal to a predetermined value, it is determined that the rotation unevenness is large and the balance state is bad. If N = 4 is not satisfied, the rotating drum is temporarily stopped in the next step 106, then 1 is added to the current N in step 107 and the process returns to step 102. When the operations from step 102 to 107 are repeated a predetermined number of times, that is, when N = 4 in step 105, it is considered that the unevenness of the laundry has not been eliminated in the loosening process of step 102, and the process proceeds to step 108. To do. In step 108, if N is less than 10, the process proceeds to step 110, a process of supplying water into the rotary drum and correcting the bias of the laundry is performed, and the process returns to step 101. If N is 10, it is considered that the unevenness of the laundry could not be resolved, the process proceeds to step 109, an unbalance abnormality is displayed, and the operation is stopped.

JP 2009-213803 A

  However, in the above-described conventional control, when an imbalance of clothes is detected during dehydration, water is supplied into the rotating drum, a stirring operation is performed to correct the cloth bias, and dehydration is performed again after draining. Naturally, the amount of water used and time increase. In addition, there is a problem that the cloth is further entangled by the stirring operation.

  The present invention solves the above-described conventional problems. When an imbalance of clothes is detected during dehydration, the amount of water is increased by blowing high-pressure and high-speed air from the front of the drum to the clothes in the drum. An object of the present invention is to provide a drum-type washing / drying machine that can eliminate the imbalance of clothes in a short time without being used for the above.

  In order to solve the above-described conventional problems, a washing and drying machine according to the present invention includes a drum that is formed in a bottomed cylindrical shape and that stores clothes, a drive motor that rotationally drives the drum, and a drum that rotatably includes the drum. A water tank, a blowing section for blowing drying air into the water tank and the drum, a displacement amount detection section that is provided in the lower portion of the water tank and detects a displacement amount of the water tank, and a heating section that heats the drying air, A first air passage having a first air outlet that communicates with the air blower and opens at a rear portion of the drum, and communicates with the air blower and opens at a front portion of the drum and blocks air from passing through the first air outlet. A second air passage having a second air outlet having a small area, an air passage switching portion that selectively switches between the first air passage and the second air passage, control of the air passage switching portion, and the air blowing portion A series of washing, rinsing, dehydration and drying A control unit that sequentially controls a stroke, and when the displacement amount detection unit detects a displacement amount larger than a predetermined displacement amount during the dehydration step, the control unit temporarily stops the dehydration operation, and After selecting two air paths and blowing air for a predetermined time, the dehydrating operation is resumed.

  As a result, when the clothes on the drum are in an unbalanced state, high-pressure and high-speed air is blown onto the clothes in the drum. Increase in energy consumption can be prevented.

  In the washing / drying machine of the present invention, since the imbalance of clothes during dehydration can be eliminated without adding the amount of water used, an efficient imbalance control system that prevents an increase in energy consumption such as time and the amount of water can be realized.

Schematic longitudinal sectional view of a drum type washing and drying machine according to an embodiment of the present invention The block diagram which shows schematic structure of the drum type washing and drying machine The figure which shows an example of the input setting part of the drum type washing-drying machine Time chart showing an example of air path switching timing when performing a continuous stroke from the washing stroke to the drying stroke of the drum type washing and drying machine Time chart showing an example of air path switching timing when unbalance is detected when performing a continuous stroke from the washing stroke to the drying stroke of the drum type washing and drying machine Time chart showing an example of air path switching timing when imbalance is detected in the dewatering process in the washing process of the drum type washing and drying machine Flow chart for determining and responding to an unbalance abnormality in a conventional drum type washing machine

  A first aspect of the present invention is a drum formed in a bottomed cylindrical shape for containing clothes, a drive motor that rotationally drives the drum, a water tank that encloses the drum in a rotatable manner, a water tank for drying in the drum and the drum A blower that blows air, a displacement detector that is provided in the lower part of the water tank and detects the amount of displacement of the water tank, a heating part that heats drying air, and communicates with the blower and opens at the rear of the drum A first air passage having a first air outlet, and a second air having a second air outlet communicating with the air blowing portion and opening in a front portion of the drum and having an air passage cross-sectional area smaller than that of the first air outlet. A path, a wind path switching unit that selectively switches between the first air path and the second air path, and a control of the air path switching unit and a control of the air blowing unit, washing, rinsing, dehydration, drying And a controller that sequentially controls a series of strokes, The control unit temporarily stops the dehydration operation when the displacement amount detection unit detects a displacement amount larger than the predetermined displacement amount during the dehydration process, selects the second air passage, and blows air for a predetermined time. When the clothes on the drum are in an unbalanced state, the high-speed and high-speed air is blown onto the clothes in the drum. Unbalance can be eliminated and an increase in energy consumption can be prevented.

  In the second aspect of the invention, in particular, the control unit of the first aspect of the invention temporarily stops the dehydration operation when the displacement amount detection unit detects a displacement amount larger than the predetermined displacement amount in the dehydration process, and the second air path After the air is blown for a predetermined time, the air blowing is stopped and the dehydrating operation is restarted, and immediately before the dehydration process is finished, the second air path is selected by the air path switching unit and the air is blown. Even in the dehydration process where heating and blowing are not performed, the clothes can be made to have less wrinkles and less tangles, and when the user subsequently removes the clothes and air-dried, the wrinkles are less and the finish is good. State.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic longitudinal sectional view of a drum type washing / drying machine according to an embodiment of the present invention.

  In FIG. 1, a bottomed cylindrical drum 1 (accommodating portion) is rotatably disposed in a water tank 2 that is swingably disposed in a housing 100. A drive motor 3 (drum drive unit) is attached to the back surface of the water tank 2 to rotate the rotation axis of the drum 1 while tilting it forward and the drum 1 is rotated by the drive of the drive motor 3. Stir and wash clothes placed in the box and dry.

  A door body 35 is provided at the front of the housing 100 so as to face the opening end side of the drum 1, and the user opens the door body 35 so that laundry (clothing) is applied to the drum 1. Can be put in and out. Further, a water supply pipe (not shown) provided with a water supply valve (not shown) and a drain pipe 40 provided with a drain valve 27 are connected to the water tank 2.

  Below the water tank 2, a damper 14 is provided that supports the water tank 2 and attenuates vibrations of the water tank 2 caused by clothing bias in the drum 1 during dehydration. The damper 14 detects the amount of clothing by detecting the amount of displacement of the shaft of the damper 14 by the weight change caused by the clothing in the water tank 2 to be supported. A damper displacement amount detection unit (displacement amount detection unit) 15 for detecting an unbalanced state of clothing is attached.

  In order to dry the clothes, the air in the water tank 2 and the drum 1 is circulated by the blower unit 4. The air that has taken moisture from the laundry in the drum 1 is in the water tank 2. Is discharged to the heat pump device 50 part outside the drum 1 through the discharge port 5 provided at the upper side of the drum 1.

  The heat pump device 50 includes a compressor 16 that compresses a refrigerant, a heating unit (radiator) 17 that radiates heat of the refrigerant that has been compressed to high temperature and pressure, and a throttle unit that depressurizes the pressure of the high-pressure refrigerant. 18, a dehumidifying part (heat absorber) 19 that draws heat from the surroundings by the reduced pressure and low pressure refrigerant, and a pipe line 20 that connects these four members to circulate the refrigerant and is discharged. The dried air is dehumidified by a dehumidifying section (heat absorber) 19 and heated by a heating section (heat radiator) 17. The heated drying air passes from the air blower 4 through the circulation air passage 13 and is guided to either the first air passage 9 or the second air passage 11 located downstream of the air blower 4, and enters the drum 1 again. Blow out.

  Here, the first air passage 9 has a first air outlet 8 opened to the rear of the drum 1. On the other hand, the second air passage 11 has a second air outlet 10 opened at the upper front portion of the drum 1.

  The first air outlet 8 of the first air passage 9 is formed so as to have an air passage cross-sectional area larger than that of the second air outlet 10, and there is less pressure loss than the second air passage 11, and a large air volume is dried. The working air can be blown into the drum 1.

  Further, the second air outlet 10 of the second air passage 11 has an air passage cross-sectional area smaller than that of the first air outlet 8, and high-pressure and high-speed drying air in the drum 1 as compared with the first air outlet 8. Can be blown out.

  Usually, in the case of a drum-type washing / drying machine, the gap between the front of the rotating drum 1 and the water tank 2 is formed as small as possible so that clothing does not bite. Therefore, although it is difficult in terms of space to provide a small opening with a small opening and a small pressure loss in the small gap, the second blowing outlet 10 that blows off high-pressure and high-speed wind with a relatively small air passage cross-sectional area is provided. It can be provided. On the other hand, the bottom of the back of the drum 1 has a space for providing the first air outlet 8 having a relatively large opening. And if the 1st blower outlet 8 is covered with the cover 26 with a large opening ratio which consists of many small diameter holes which can ventilate, clothing will not bite into the said 1st blower outlet 8. FIG. Therefore, the 1st blower outlet 8 with comparatively little pressure loss can be provided in the bottom face of drum 1 back.

  The air path switching unit 12 is provided on the downstream side of the air blowing unit 4. The air path switching unit 12 switches the passage of drying air to either the first air path 9 or the second air path 11.

  The air path switching unit 12 includes a valve 12a pivotally supported by a branch portion between the first air path 9 and the second air path 11, and a drive unit (not shown) that rotationally drives the valve 12a. It comprises.

  And if the valve 12a rotates and the 2nd air path 11 is closed, the 1st air path 9 side will be opened, and the drying air sent in the ventilation part 4 will pass the 1st air path 9. FIG. On the other hand, when the valve 12 a rotates to close the first air passage 9, the second air passage 11 side is opened, and the drying air blown by the blower unit 4 passes through the second air passage 11.

  The air blowing unit 4 is provided between the heating unit (radiator) 17 and the air path switching unit 12 of the heat pump device 50, and the drying air heated by the heating unit (radiator) 17 is downstream of the circulation air path 13. Send to the side. The blower unit 4 includes a blower fan 4a and a blower fan motor 4b.

  In the air blowing unit 4, when the air path switching unit 12 switches to the first air path 9, the air volume passing through the first air path 9 becomes a predetermined air volume larger than the air volume of the second air path 11. The fan 4a for blowing is rotated.

  In addition, when the air path switching unit 12 switches to the second air path 11, the wind speed passing through the second air outlet 10 of the second air path 11 is higher than the wind speed passing through the first air outlet 8. The fan 4a for blowing is rotated so that For example, the wind speed that passes through the first air outlet 8 is about 10 m / s, and the wind speed that passes through the second air outlet 10 is 50 m / s or more.

  In addition, the wind speed which passes the 1st blower outlet 8 and the 2nd blower outlet 10 is not limited to this, Arbitrary if the wind speed in the 2nd blower outlet 10 satisfy | fills conditions faster than the wind speed in the 1st blower outlet 8 The wind speed can be set.

  The discharge port 5 is relatively disposed at a position farther from the first air outlet 8 than the distance from the second air outlet 10. That is, the discharge port 5 is relatively close to the second air outlet 10 and far from the first air outlet 8.

  As described above, in the present embodiment, the heat pump type clothing drying is described, but the present invention is not limited to the heat pump type. For example, the dehumidifying unit may be a water-cooling type in which water is sprayed directly on the drying air, and the heating unit may be a heater.

  Further, as described above, in the present embodiment, only one first air outlet 8 of the first air passage 9 is provided, but a plurality of the first air outlets 8 may be provided. Similarly, although the example which provided only the 2nd blower outlet 10 of the 2nd air path 11 is shown, the 2nd blower outlet 10 can also be made into two or more.

  FIG. 2 is a block diagram showing a schematic configuration.

  In FIG. 2, the control unit 70 sequentially controls a series of operation operations including washing, rinsing, dehydration, and drying based on setting information input from the user via the input setting unit 32 and operation state monitoring of each unit. To do.

  The control unit 70 controls the rotation of the drive motor 3 via the motor drive circuit 22 while measuring the vibration amount of the water tank 2 based on the information input from the damper change amount detection unit 15, and the blower unit 4 and the heat pump device 50. And the air path switching unit 12 is controlled to switch between the first air path 9 and the second air path 11. Further, the rotational speed of the drive motor 3 is detected by an input from the motor rotational speed sensor 80.

  The control unit 70 includes, for example, a CPU (Central Processing Unit) (not shown), a ROM (Read Only Memory) that stores programs, a RAM (Random Access Memory) that stores programs and data when various processes are executed, and an input / output interface. And a bus connecting them.

  The control unit 70 also has a timer 71 that measures time. As the timer 71, an internal timer incorporated as an internal function in the operation of the control unit 70 can be used. As the timer 71, a timer device independent from the control unit 70 can be used.

  FIG. 3 is a diagram illustrating an example of the input setting unit 32.

  In FIG. 3, a course switch 325 for selecting a driving course, a washing process / drying process, or a washing / drying switch 323 for selecting a continuous process from washing to drying, during the process of only drying, the second air path 11 In addition to the high-speed jet switch 321 for setting whether to use the high-pressure and high-speed wind from the second outlet 10, a number of switches, a course LED 326 for displaying the selection status and progress of each driving course with LEDs, a washing In addition to the dry LED 324 and the high-speed jet LED 322, the display unit includes a number of display units.

  The operation and action of the drum type washing and drying machine configured as described above will be described below.

  In the drying process, since the rotating shaft of the drum 1 is inclined forward, the clothes such as socks, handkerchiefs and briefs are biased to the back of the drum 1 when the drum 1 is rotated and the clothes are stirred and dried. On the other hand, long clothing such as underwear with long sleeves, under pants, a cutter shirt with long sleeves, and pajamas with long sleeves tends to be biased forward of the drum 1.

  Accordingly, when drying is performed in a state where small clothes and long clothes are mixed, if a large amount of drying air is blown out from the first air outlet 8 located at the back rear of the drum 1, the small clothes biased toward the back of the drum 1 are used. The drying air comes into contact first. Further, the drying air passes through the small clothes and reaches the long clothes in front of the drum 1. Therefore, both small clothes and long clothes can be efficiently dried.

  On the other hand, for long clothes whose sleeves and the like are likely to twist due to agitation during drying, the drying speed is higher when the drying air is applied from the second air outlet 10 located in front of the drum 1 because it tends to be biased to the front of the drum 1. Get faster. Further, by applying high-pressure and high-speed drying air ejected from the second air outlet 10 to the long clothing, the long clothing is easily spread and the long clothing moves well by the wind, so that the effect of reducing wrinkles is great.

  In addition, when the drying process is divided into regions based on the drying rate, wrinkles of up to 90% of the drying rate are difficult to be fixed, and wrinkles of about 90% to 100% of the drying rate are generated and fixing increases. It becomes a region in the middle of drying that is easy to dry, and a region in the final stage of drying in which the drying rate exceeds 100% and wrinkles are hardly generated.

  In the present embodiment, when performing a continuous process from washing to drying, the region in the early stage of drying starts from the middle of the dehydration process performed at the end of the washing process. In the dehydration process, the drum 1 rotates at a high speed, and in parallel with the control for high-speed centrifugal dewatering of the internal garment, the control is performed to circulate hot air until the temperature of the garment is raised in advance until the drying is completed. This is to shorten the operation time.

  FIG. 4 is a time chart showing an example of air path switching timing when performing a continuous process from the washing process to the drying process.

  In FIG. 4, the drying operation starts in the middle of the dehydration process in the washing process, but the air path switching unit 12 is controlled during the initial drying period from the start of the drying operation until the first predetermined time elapses. The first air passage 9 side is opened, the rotational speed of the blower fan motor 4b is relatively low, and the first air outlet 8 of the first air passage 9 at the rear of the drum 1 has a large air passage cross-sectional area and a small pressure loss. From a low air speed, a large amount of drying air is blown into the drum 1 and applied to the clothes. In addition, the dehydration process ends in the middle of the drying process, and the drying process begins.

  In the middle drying period, the air path switching unit 12 switches to the second air path 11 to increase the rotational speed of the blower fan motor 4b. As a result, in the middle drying period, high-pressure and high-speed drying air is blown into the drum 1 from the second blower outlet 10 having a smaller air passage cross-sectional area than the first blower outlet 8. In this case, since the clothes in the drum 1 are always spread by the high-pressure and high-speed wind, the effect of reducing wrinkles is exhibited.

  Further, at the end of drying after the second predetermined time has elapsed, the air path switching unit 12 switches to the first air path 9 in the same manner as the drying early period. In the final stage of drying, the amount of moisture contained in the clothes is small, and it takes time for this little moisture to come into contact with the drying air and evaporate. In such a state, it is necessary to increase the chance that moisture and the drying air come into contact with each other by blowing a large amount of drying air into the drum 1, and a large amount of air can be obtained with low power consumption. desirable. Therefore, the first air passage 9 having a large air passage sectional area and a small pressure loss is used, and a large amount of drying air is blown out from the first air outlet 8 at the rear of the drum 1 and applied to the clothes. This operation is continued until the end of the drying process.

  FIG. 5 is a time chart showing an example of the airway switching timing when imbalance detection is performed when performing a continuous process from the washing process to the drying process, and the dehydration process part in FIG. In more detail.

  In FIG. 5, the control unit 70 controls the motor drive circuit 22 to increase the number of rotations of the drum 1 and confirms whether or not an unbalanced state is obtained from the input from the damper shift amount detection unit 15. Since the vibration of the water tank 2 containing the drum 1 changes according to the number of rotations of the drum 1 due to its natural frequency and the like, the number of rotations of the drum 1 is not increased all at once, and is first steady at 80 r / min. Then, it is gradually raised while rotating at a specific rotation speed of 120 r / min, 330 r / min, and 400 r / min for a certain period of time.

  In the middle of dehydration, the drying operation is also started when the rotational speed of the drum 1 exceeds 80 r / min. As described above, since the drying operation is in an early stage at the time of starting the drying operation, the control unit 70 opens the first air passage 9 by the air passage switching unit 12, and the rotational speed of the blower fan motor 4b is relatively high. Since the temperature is low, the warm air blown into the drum has a low air velocity from the first outlet 8 but a large air volume.

  During the dehydration stroke operation, the control unit 70 constantly monitors the amount of displacement due to the vibration of the water tank 2 containing the drum 1 by the input from the damper displacement amount detection unit 15, but the amount of displacement exceeds a predetermined value. If it is detected that the clothes in the drum 1 are in an unbalanced state, the drive motor 3 is stopped via the motor drive circuit 22, the centrifugal dehydration is suspended, and the unbalance is stopped. The action of canceling is performed.

  After the suspension of centrifugal dehydration, the control unit 70 switches to the second air path 11 by the air path switching unit 12 and increases the rotational speed of the blower fan motor 4b. Thus, high-pressure and high-speed hot air is blown from the second air outlet 11 of the second air passage 11 onto the clothing in the drum 1, and the clothing attached to the drum is peeled off and the clothing is stretched, and the position of the clothing The change of clothes can be promoted, and the unbalanced state of the clothes is eliminated.

  Further, the control unit 70 controls the drum drive circuit 22 to rotate the drum 1 intermittently at a low speed of about 45 r / min while sequentially switching the rotation direction of the drum 1. The reason why the cloth is rotated at a low speed is that the clothes are agitated and the position of the clothes is changed to further improve the unbalanced state. After a predetermined time, the drum 1 is intermittently rotated while blowing high-pressure and high-speed hot air from the second air outlet 10 of the second air passage 11, and then dehydration is resumed. In response to resuming the dehydration, the controller 70 causes the air path switching unit 12 to switch the circulation path to the first air path 9 and resumes the large air volume drying operation. In addition, the rotational speed of the fan motor 4b for blowing is also lowered.

  Since the unbalanced state can be eliminated by wiping the clothes with high-pressure and high-speed wind, the restarted dehydration reaches the target maximum rotational speed of 1600 r / min.

  When this dehydration process is completed, the drying process is performed for a predetermined time as described above with reference to FIG.

  FIG. 6 is a time chart showing an example of air path switching timing when unbalance is detected in the dehydration process in the washing process.

  When the user selects the washing only operation in the washing / drying mode with the washing / drying changeover switch 323, the operation is only the washing process in which washing, rinsing and dehydration are performed. At this stage, the drying process is not performed.

  When the rotational speed of the drum 1 being dehydrated is increasing, the control unit 70 determines that the amount of change due to vibration of the water tank 2 containing the drum 1 exceeds a predetermined value by the input of the damper change amount detection unit 15. If it is detected, it is determined that it is in an unbalanced state, the drive motor 3 is stopped via the motor drive circuit 22, centrifugal dehydration is temporarily suspended, and an unbalance elimination operation is performed.

  First, the air path switching unit 12 selects the second air path 11 as the air path, and starts the operation of the blower fan motor 4b. Since it is not dry, the heat pump device 50 is not driven. As a result, the high-pressure and high-speed wind is blown from the second air outlet 10 of the second air passage 11 to the clothing in the drum 1, and the clothing attached to the drum 1 is peeled off and the clothing is stretched. The change of the position of the clothes can be promoted, and the unbalanced state of the clothes is eliminated.

  Further, the control unit 70 controls the drum driving circuit 22 to rotate the drum 1 intermittently at a low speed of about 35 r / min while sequentially switching the rotation direction of the drum 1. The reason why the cloth is rotated at a low speed is that the clothes are agitated and the position of the clothes is changed to further improve the unbalanced state. After performing the intermittent rotation operation of the drum 1 while blowing high-pressure and high-speed wind from the second outlet 10 of the second air passage 11 for a predetermined time, dehydration is resumed. When the dehydration is resumed, the operation of the blower fan motor 4b is stopped.

  When the dehydration operation is stopped after a predetermined time has elapsed, the clothes are firmly attached to the inner peripheral wall of the drum 1 by high-speed centrifugal dehydration. Then, the control part 70 selects the 2nd air path 11 as an air path by the air path switching part 12, and starts the driving | operation of the fan motor 4b for ventilation. Since it is not dry, the heat pump device 50 is not driven.

  As a result, high-pressure and high-speed wind is blown from the second air outlet 10 of the second air passage 11 onto the clothing in the drum 1, and the clothing adhered to the drum 1 is peeled off and the clothing is stretched. It is possible to promote the change of position of clothing.

  Further, the control unit 70 controls the drum drive circuit 22 to rotate the drum 1 intermittently at a low speed of about 35 r / min while sequentially switching the rotation direction of the drum 1. The reason for rotating at a low speed is to further remove the garment adhered to the drum 1 and to facilitate the change of the position of the garment. After intermittently rotating the drum while blowing high-pressure and high-speed wind from the second outlet 10 of the second air passage 11 for a predetermined time, the dehydration process ends.

  After a certain period of time has elapsed, after stopping the dehydration operation, by blowing high-pressure and high-speed wind onto the clothing and peeling it off the drum, the clothing is made to have fewer wrinkles and entanglement compared to the conventional example where it is left as it is. Even when the user takes out the garment and air-drys it afterwards, there is little wrinkle and a good finish.

  During the dehydration, the time for performing the unbalance elimination operation is controlled so as to be included in the predetermined time of the dehydration process so as to be the same as when there is no unbalance elimination operation.

  Note that the rotation control of the drum 1 when the imbalance occurs is intermittently rotated while sequentially switching the rotation direction, but may be rotated in a certain direction. Due to the direction of the second air outlet 10 restricted from the airframe structure, it is possible to achieve more effective rotation with respect to the clothing.

  The dehydration operation is also performed as an intermediate dehydration during the rinsing process. However, even during the intermediate dehydration, the above-described unbalance canceling operation can be performed when an imbalance of clothes is detected.

  In the embodiment, as a means for detecting an imbalance at the time of dehydration, the damper shift amount detection unit 15 uses the shift amount of the drum 1 due to vibration at the time of occurrence of the imbalance, but is not limited thereto. It is not something. It is good also as a system which installs an acceleration sensor in the water tank 2 etc., and determines the vibration degree of the water tank 2 by measuring the acceleration during dehydration. Or it is good also as a system which installs a magnetic sensor and a magnet in the fixed position of the water tank 2 and the water tank 2 vicinity, respectively, and determines the variation | change_quantity of the water tank 2. FIG. Alternatively, a method may be used in which the imbalance is determined based on variations in time variation of the drum rotation speed during one rotation of the drum. Alternatively, a method may be used in which an imbalance is determined based on variations in time fluctuations in the current value consumed by the motor drive circuit during one revolution of the drum.

  As described above, in the present embodiment, in the process continuously performed from dehydration to drying, during the dehydration process in which the first air path is selected, the damper displacement amount detection unit is larger than the predetermined displacement amount. When dewatering operation is detected, the dehydration operation is temporarily stopped, the air path switching unit switches to the second air path and blows for a predetermined time, and then the dehydration operation is restarted and the first air path is selected. Therefore, when the clothes on the drum are in an unbalanced state, high-speed and high-speed air is blown onto the clothes in the drum, so that it is possible to eliminate the imbalance of the clothes in a short time without using an excessive amount of water. Energy increase can be prevented.

  Also, in the dehydration process that is not continuous with the drying process, the fan motor for blower is stopped to perform the dehydration operation, and when the damper displacement amount detection unit detects a displacement amount larger than the predetermined displacement amount, the dehydration operation is temporarily stopped. Then, the second air path is selected by the air path switching unit, and the fan motor for blowing is operated to blow air for a predetermined time, and then the fan motor for blowing is stopped to restart the dehydrating operation, and the dehydrating operation is stopped. Immediately before the end of the subsequent dehydration process, the second air path is selected by the air path switching unit, and the fan motor for blowing is operated to blow air. Can be made into a state with less wrinkles and less tangles, and after that, when the user takes out the clothing and air-drys it, it can be made into a state with less wrinkles and a good finish.

  The laundry dryer according to the present invention can eliminate imbalance by blowing high-pressure and high-speed wind from the blowout outlet when an ambassador state of the garment occurs during dehydration. It is applicable to uses such as clothes washing and drying machines.

DESCRIPTION OF SYMBOLS 1 Drum 2 Water tank 3 Drive motor 4 Air blower 4b Fan fan motor 8 1st outlet 9 1st air path 10 2nd air outlet 11 2nd air path 12 Air path switching part 15 Damper displacement amount detection part (displacement amount detection part) Part)
17 Heating unit 70 Control unit

Claims (2)

A drum formed in a bottomed cylindrical shape for containing clothes, a drive motor for rotating the drum, a water tank for rotatably containing the drum, and a blower for blowing drying air into the water tank and the drum A displacement amount detection unit that is provided in the lower part of the water tank and detects a displacement amount of the water tank, a heating unit that heats drying air, and a first air outlet that communicates with the air blowing unit and opens at the rear part of the drum. A first air passage having a second air passage that communicates with the air blowing portion and opens at a front portion of the drum and has a smaller air passage cross-sectional area than the first air outlet, and the first air passage. An air path switching unit that selectively switches between the air path and the second air path, and the air path switching unit and the air blowing unit are controlled, and a series of steps of washing, rinsing, dehydration, and drying are sequentially performed. A control unit for controlling, the control unit is dewatering During the process, when the displacement detection unit detects a displacement larger than the predetermined displacement, the dehydration operation is temporarily stopped, the second air passage is selected and the air is blown for a predetermined time, and then the dehydration operation is resumed. A washing and drying machine characterized by In the dehydration process, the control unit temporarily stops the dehydration operation when the displacement amount detection unit detects a displacement amount larger than the predetermined displacement amount, selects the second air path, and blows air for a predetermined time, and then blows air. The washing and drying machine according to claim 1, wherein the washing and drying operation is performed by stopping and restarting the dehydrating operation, and selecting and blowing the second air path by the air path switching unit immediately before the end of the dewatering process.

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