JP2018138096A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute an air drying step at proper timing in a washing and drying machine which includes a drum rotatable around a horizontal shaft.SOLUTION: A washing and drying machine includes a drying operation control device which executes an air drying step of drying clothing in a drum by exhausting the air sucked into a water tub from an intake port to the outside of the water tub from an exhaust port through the drum, by an airflow generating by the rotation of the drum, following the rotation of the drum. The drying operation control device repeatedly and alternately executes a dewatering operation for rotating the drum at a predetermined rotation speed and a disentangling operation for rotating the drum at a speed lower than the predetermined rotation speed in the air drying step, and during the execution of the disentangling operation in an initial period from the start of the air drying step until a predetermined time is elapsed, it detects weight of clothing containing moisture in the drum, and sets a residual operation time of the air drying step based on the change amount of the weight detected over time.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing dryer.

  In the so-called vertical type fully automatic washing machine, in recent years, without using a heater or a blower in the drying process, a wind drying process is performed in which clothes are dried using the flow of wind generated when the rotating tub is rotated at high speed. (For example, refer to Patent Document 1). In the washing machine of Patent Document 1, the user puts clothes below the rated amount into the rotating tub, selects and sets an appropriate time from several operation times, and starts the operation. A drying process is performed.

JP 2006-43184 A

  However, in the above-described conventional configuration, the wind drying process is executed for a set time regardless of the difference in the amount of clothes input and the progress of drying. For this reason, the wind drying process is not always performed for an appropriate time, and the drying condition at the end of the process varies. As a result, the drying operation has not been sufficiently performed, and it is necessary to perform the drying operation again, or the wind drying process is performed unnecessarily for a long time.

  In view of the above, a washing / drying machine having a drum rotatable around a horizontal axis and capable of performing a wind drying process at an appropriate time is provided.

  The washing and drying machine of the present embodiment includes a water tank having an air inlet and an air outlet, a drum having a large number of holes provided around the horizontal axis in the water tank, a driving device for rotating the drum, As the drum is rotated by controlling the driving device, the air sucked into the water tank from the intake port is exhausted from the exhaust port to the outside of the water tank through the drum by the flow of wind generated by the rotation of the drum. A drying operation control device for performing a wind drying process for drying the clothes in the drum, and the drying operation control device includes a dehydrating operation for rotating the drum at a predetermined rotation speed in the wind drying process; And an unwinding operation of rotating the drum at a speed lower than the predetermined rotational speed alternately and repeatedly performing an initial period from the start of the air drying process until a predetermined time elapses. During the execution of operations loosening in performs detection of the weight of the clothes containing moisture in said drum, and sets the remaining operating time of the wind drying cycle based on the amount of change in weight was detected over time.

1 is a longitudinal side view schematically showing an overall configuration of a washing / drying machine according to the first embodiment. Block diagram showing electrical configuration The figure which shows the progress state of the stroke in the wind drying stroke The figure which shows the situation of the fluctuation of the rotation speed of the drum in the wind drying process Diagram showing the relationship between q-axis current value and remaining time setting area A figure showing a 2nd embodiment and showing a situation of change of number of rotations of a drum at the time of one dehydration operation when an unbalanced state arises The figure which shows 3rd Embodiment and shows the mode of the fluctuation | variation of the rotation speed of the drum in an air drying process. The 4th Embodiment is a figure which shows the mode of the fluctuation | variation of the rotation speed of the drum in an air drying process. The figure which shows 5th Embodiment and shows the relationship between the amount of cloths, and the drum rotation speed in spin-drying | dehydration operation.

  Hereinafter, some embodiments applied to a drum-type (horizontal shaft type) washing and drying machine will be described with reference to the drawings. In a plurality of embodiments described below, common parts are denoted by the same reference numerals, and new illustrations and repeated descriptions are omitted.

(1) First Embodiment A first embodiment will be described with reference to FIGS. First, with reference to FIG. 1, the whole structure of the washing / drying machine 1 which concerns on this embodiment is described. The washing / drying machine 1 has a housing 2 having a substantially rectangular box shape. At the center of the front surface of the housing 2, a laundry entrance 3 is provided, and a door 4 that opens and closes the laundry entrance 3 is disposed. An operation panel 5 (shown only in FIG. 2) is provided on the upper front of the housing 2. Further, a control device 6 is provided in the housing 2 as a control means for controlling the entire washing / drying machine 1.

  In the housing 2, a horizontal cylindrical water tank 7 is supported via a plurality of (for example, a pair of left and right) suspensions 8 (only one part is shown) in a state where the water tank 7 is slightly inclined rearwardly. An outer rotor type washing machine motor 9 made of, for example, a brushless DC motor is disposed as a driving device at the center of the rear end side of the water tank 7. A cylindrical drum 10 in which clothes (laundry) is housed is supported in the water tank 7 so as to be rotatable about an inclined axis extending in the front-rear direction and slightly inclined rearwardly.

  Although not shown in detail, a hub portion to which the rotating shaft 9a of the washing machine motor 9 is connected is provided at the center portion on the back surface portion of the drum 10, and six spoke portions from the hub portion toward the outer periphery are provided. Is provided. The gap portion between the spoke portions is formed in a mesh shape having a large number of ventilation holes. As shown in FIG. 1, the rotating shaft 9 a of the motor 9 passes through the back surface of the water tank 7 and is connected to the hub portion at the center of the rear end side of the drum 10. Thus, the drum 10 is directly driven to rotate by the motor 9.

  A plurality of, for example, three baffles 11 for picking up clothes (for stirring) are provided on the inner peripheral surface of the drum 10. A plurality of holes 12 for water passage (ventilation) are formed in the peripheral wall portion of the drum 10 except for the portion where the baffle 11 is disposed. Furthermore, in this embodiment, the stirring blade 13 for stirring the air in the drum 10 (flowing to the outer peripheral side) is attached to the inner surface side of every other three portions of the spoke portion of the drum 10 in the circumferential direction. ing. Further, an opening 10a through which clothes are taken in and out is provided on the front surface of the drum 10. The front surface of the water tub 7 is formed with a loading port 7 a that is continuous with the opening 10 a, and the loading port 7 a communicates with the laundry outlet 3 through a bellows 14.

  Although not shown, a drain outlet is formed at the bottom of the water tank 7, and this drain outlet is connected to a drain pipe via a drain valve 15 (shown only in FIG. 2). Thus, when the drain valve 15 is opened, the wash water in the water tank 7 is drained to the outside through the drain pipe. Further, an overflow port 16 is provided on the back surface of the water tank 7 so as to be closer to the upper part. The overflow port 16 is connected to an overflow channel 17, and the lower end of the overflow channel 17 is connected to the drain pipe (downstream of the drain valve 15). Thus, when the water level in the water tank 7 exceeds the overflow port 16, the water is discharged through the overflow channel 17.

  Further, although not shown, a water supply mechanism for supplying water into the water tank 7 is provided in the upper part of the housing 2. As is well known, this water supply mechanism includes a water supply valve 18 (shown only in FIG. 2) and a water injection case having a detergent accommodating portion and the like. By the opening operation of the water supply valve 18, tap water is supplied to the water tank 7 through the water injection case. A water level sensor (not shown) for detecting the water level in the water tank 7 is also provided at the top of the housing 2.

  The water tank 7 is provided with an intake port 19 for sucking dry air and an exhaust port 20 for exhausting the dry air. In the present embodiment, the intake port 19 is located on the upper left side, which is the peripheral part of the washing machine motor 9, on the upper rear side of the water tub 7, and is a horizontally long shape slightly curved along the outer periphery of the washing machine motor 9. It is provided in the form. The intake port 19 is located above the overflow port 16. Further, the exhaust port 20 is provided on the right upper side of the front surface of the upper surface of the water tank 7. For example, a rubber bellows-like exhaust duct 21 is connected to the exhaust port 20, and an air exhaust port 22 for exhausting to the outside is provided on the upper surface of the housing 2. A filter for capturing lint may be provided in the exhaust duct 21 portion.

  Further, a cover 23 covering the back side of the washing machine motor 9 is attached to the back side of the water tank 7. The cover 23 has a thin cylindrical shape with an open front surface, and is integrally formed with a bulging portion 23a that swells in the outer peripheral direction. The cover 23 is attached so that the front opening end is in contact with the back surface of the water tank 7, and the bulging portion 23 a is positioned so as to cover the intake port 19. Accordingly, the air inlet 19 communicates with the cover 23. In addition, an air intake port 23b that opens in a circular shape corresponding to the central portion of the washing machine motor 9 is formed on the rear surface portion of the cover 23, and the air intake port 23b is allowed while allowing air to pass therethrough. A filter 24 for collecting dust is arranged so as to close it.

  FIG. 2 shows an electrical configuration of the washing / drying machine 1 centering on the control device 6. The control device 6 is mainly composed of a computer including a CPU, a ROM, a RAM and the like, and controls the entire washing / drying machine 1 to execute each step of the washing operation and the drying operation. At this time, the control device 6 receives an operation signal from the operation panel 5 and controls display on each display unit of the operation panel 5. The control device 6 is connected to a current sensor 25 for detecting the current flowing through the washing machine motor 9 and a vibration sensor 26 for detecting the vibration of the drum 10 (water tank 7), and signals from these are input.

  The control device 6 controls the opening and closing of the water supply valve 18 and the drain valve 15 while driving and controlling the washing machine motor 9. With the above configuration, the control device 6 controls each mechanism of the washing and drying machine 1 based on input signals from each sensor and a pre-stored control program in accordance with a user's course setting operation or the like on the operation panel 5. Control. Thus, the control device 6 executes a washing operation including, for example, well-known washing, rinsing, and dehydration processes.

  The control device 6 executes a cloth amount detection operation (weight sensing) for rotating the drum 10 for a short time at the start of the washing operation, and the detected current value of the current sensor 25 (q-axis current for the torque component) at that time. Based on the value, the amount of clothes in a state of not containing moisture (the weight of the clothes before water supply) is determined. The control device 6 determines the unbalanced state of the drum 10 based on the detection of the vibration sensor 26 during the washing operation.

  By the way, in this embodiment, the control apparatus 6 performs the wind drying process which dries the clothing in the drum 10 with a wind after completion | finish of washing operation by the software structure (execution of a control program). As will be described in the following description of the operation, this air drying process is performed by controlling the washing machine motor 9 to rotate the drum 10 and the air flow from the air inlet 19 into the water tank 7 by the flow of wind generated by the rotation of the drum 10. , And the sucked air is exhausted from the exhaust port 20 to the outside of the water tank 7 through the drum 10. Therefore, the control device 6 functions as a drying operation control device.

  Specifically, the control device 6 alternately repeats a dewatering operation for rotating the drum 10 at a predetermined rotational speed and a loosening operation for rotating the drum 10 at a speed lower than the predetermined rotational speed in the wind drying process. And execute. At the same time, the control device 6 performs the unwinding operation of the clothing in the drum 10 during the initial period until a predetermined time (for example, about 22 minutes when the cloth amount is standard) elapses from the start of the wind drying process. The weight including moisture is detected (weight sensing), and the remaining operation time of the wind drying process is set based on the detected change in weight over time. The weight detection at this time is also performed based on detecting the current value (q-axis current value) flowing through the washing machine motor 9 during the loosening operation by the current sensor 25.

  As shown in FIG. 3, in the initial period, for example, the dewatering operation is executed for 5 minutes and the unwinding operation is executed for 30 seconds. Then, after the initial period has elapsed, for example, the dehydrating operation is performed for 30 minutes and the unwinding operation is performed for 2 minutes. As shown in FIG. 4, the drum 10 (washing machine motor 9) is rotated in one direction (forward direction) at, for example, 1200 rpm during the dehydrating operation, and the drum 10 (washing machine motor 9) is short during the unwinding operation. It is rotated at a relatively low speed (for example, 50 rpm) alternately in the forward and reverse directions every time (for example, 5 seconds).

  The number of rotations of the drum 10 during the unwinding operation (in this case, 50 rpm) is a predetermined number of rotations such that a part of the clothing remains stuck in the drum 10 and the remaining part of the clothing is peeled off. It is set in advance. In the present embodiment, as shown in FIG. 4, the control device 6 stops the rotation of the drum 10 for a certain time (for example, about 1 to several seconds) when the dehydrating operation and the unraveling operation are switched in the wind drying process. .

  At this time, the control device 6 temporarily sets the reference operation time in the wind drying process in advance according to the amount of cloth determined at the start of the washing operation. The amount of cloth is determined in three stages, for example, large (5 kg or more), standard (3 kg or more to less than 5 kg), and small (less than 3 kg). When the cloth amount is standard, for example, the entire operation time is set (temporary setting) to 180 minutes. When the amount of cloth is large, the entire operation time is temporarily set longer (for example, 30 minutes longer), and when the amount of cloth is small, the entire operation time is temporarily set shorter (for example, 30 minutes shorter). Is done. In addition, according to the determined cloth amount, you may comprise so that the time of one spin-drying | dehydration operation | movement and a loosening operation | movement may be changed (it is so long that there are many cloth amounts).

  Then, the control device 6 temporarily sets the remaining operation time of the wind drying process based on the result of the plurality of weight detections (weight sensing) in the initial period when the detected weight change amount is relatively large. If the change amount of the detected weight is relatively small, the remaining operation time of the wind drying process is made longer than the temporarily set operation time.

  Specifically, as shown in FIG. 5, when the q-axis current value is taken on the vertical axis and the elapsed time from the start of the wind drying process is taken on the horizontal axis, the current q-axis current values are A, B, It is determined which of the three areas of C. In area A, the amount of change in the detected weight is determined to be relatively small and difficult to dry, and the remaining operation time is extended by 60 minutes from the standard operation time, for example. In area B, the amount of change in the detected weight is standard and is determined to be standard dryness, and the standard operation time is maintained. In area C, the amount of change in the detected weight is determined to be relatively large and easy to dry, and the remaining operation time is reduced by, for example, 30 minutes from the standard operation time.

  Next, the operation of the washing / drying machine 1 configured as described above will be described. If the user wants to sequentially execute a washing operation and a drying operation for clothes (laundry), the user puts the clothes into the drum 10, selects and sets a course for the washing and drying operation on the operation panel 5, and starts the operation. . Then, the control apparatus 6 controls each mechanism as follows, and performs the washing and drying operation. That is, at the start of the washing operation, the amount of clothes (dry cloth) in the drum 10 is determined, the water level and time are determined based on the determination of the amount of cloth, and the steps of washing, rinsing, and dewatering are executed. . Then, when the washing operation is completed, the drying operation, that is, the wind drying process is continuously performed.

  In the air drying process, as shown in FIG. 3, the dehydrating operation and the unwinding operation are repeated alternately. Among them, the dehydrating operation is performed by rotating the drum 10 in one direction (forward direction) at a relatively high predetermined rotation speed (for example, 1200 rpm) as shown in FIG. In the loosening operation, the drum 10 is rotated alternately in the forward direction and the reverse direction alternately at a relatively low speed (for example, 50 rpm) for a short time. The loosening operation promotes the stirring of the clothes in the drum 10 such as the clothes attached to the inner surface of the drum 10 being peeled off. The imbalance of clothes in the drum 10 is also eliminated. In addition, when the dehydrating operation is switched to the unwinding operation, the drum 10 is stopped for a predetermined time, so that at least a part of the clothes attached to the inner peripheral surface of the drum 10 falls.

  In the dehydration operation, the drum 10 itself serves as a fan as the drum 10 is driven to rotate at a relatively high speed in the normal rotation direction by the washing machine motor 9. A flow occurs. That is, air between the housing 2 and the back side of the water tank 7 is sucked into the cover 23 through the filter 24 from the air intake port 23 b of the cover 23, passes through the periphery of the washing machine motor 9, and from the intake port 19. It is sucked into the water tank 7 (the back side of the drum 10).

  The sucked air flows between the water tank 7 and the drum 10 (the outer peripheral side of the drum 10), and a part of the air is exhausted from the exhaust port 20, but the remaining air enters the drum 10 from the front side. The air in the drum 10 flows from the front to the rear in the center part (near the shaft part) of the drum 10 and flows to the outer peripheral side at the rear part in the drum 10. And the wind which flows ahead on the surface side of the clothes stuck on the inner peripheral wall of the drum 10, the wind which goes out from the hole 12 through the clothes, and the wind which flows in the rotation direction are further generated. The air used for drying passes through the exhaust duct 21 from the exhaust port 20 and is discharged to the outside from the air discharge port 22 on the upper surface of the housing 2. Due to such air flow, moisture is deprived from the clothing, and the air containing the moisture is exhausted from the exhaust port, and drying of the clothing proceeds.

  At this time, since the washing machine motor 9 generates heat by driving and warms the air around the washing machine motor 9, the air warmed by passing around the washing machine motor 9 is sent from the intake port 19 on the back of the water tub 7 to the clothing. Can be subjected to drying. Incidentally, according to the inventor's test, for example, air having a temperature higher by about 10 ° C. than outside air can be supplied into the water tank 4. Moreover, by providing the stirring blade 13 on the back surface of the drum 10, the effect of air stirring is further enhanced, and the flow of air in the drum 10 can be increased to improve the drying efficiency. By repeating such a dehydrating operation and the above-described unraveling operation alternately, the drying proceeds while applying the air evenly to the entire clothes in the drum 10, and when a predetermined operating time has elapsed, the wind drying process Ends.

  Here, in this embodiment, as shown in FIG. 3, in the initial period (about 20 minutes) of the air drying process, the dehydrating operation is executed for 5 minutes and the unwinding operation is executed for 30 seconds. At the same time, weight detection (weight sensing) of the clothes in the drum 10 is performed at the start of the wind drying process and during the loosening operation in the initial period. In this weight detection, the weight of clothing still containing moisture is detected. After the initial period, the dehydrating operation is executed for 30 minutes and the unwinding operation is executed for 2 minutes.

  When the weight detection is performed a plurality of times in the initial period, the operation time is reviewed based on the detected change in weight with the passage of time, and the remaining operation time of the wind drying process is set. When clothing is in a condition that is easy to dry (material, total amount, external environment, etc.), if the amount of change in the detected weight, that is, the degree of decrease is large and drying is difficult to proceed The degree of weight reduction is relatively small.

  In this case, as shown in FIG. 5, when the q-axis current value is in area A, it is determined that the clothing is difficult to dry, and is extended by 60 minutes from the temporarily set reference operation time (for example, 180 minutes). The remaining operation time is set as follows. When the q-axis current value is in area B, it is determined that the clothes are easily dried, and the remaining operation time is set with the temporarily set operation time. When the q-axis current value is in area C, it is determined that the clothes are likely to dry, and the remaining operation time is set so as to be reduced by, for example, 30 minutes from the temporarily set reference operation time. In this way, the wind drying process is executed without excess or deficiency in a more appropriate operation time according to the ease of drying of the clothes.

  According to this embodiment, the following actions and effects can be obtained. That is, in the present embodiment, in the wind drying process, the dehydrating operation for rotating the drum 10 at a predetermined rotational speed and the unwinding operation for rotating the drum 10 at a lower speed than the predetermined rotational speed are alternately and repeatedly executed. When performing the unwinding operation in the initial period of the wind drying process, the weight of the clothes in the drum 10 is detected, and the remaining operation time of the wind drying process is set based on the detected change in weight over time. Configured to do.

  As a result, even when a device that serves as a heat source is omitted, the clothes in the drum 10 can be so-called wind-dried, power saving can be achieved, and an inexpensive and simple configuration can be achieved. . In particular, in this embodiment, the exhaust heat of the washing machine motor 9 can be used for drying, and the drying efficiency can be further increased. And the ease of drying of clothing can be determined in the initial period from the start of the air drying process, and the remaining operation time of the air drying process can be set more appropriately. As a result, according to the washing / drying machine 1 of the present embodiment, the washing / drying machine 1 is provided with the drum 10 that can rotate around the horizontal axis, and can perform an air drying process at an appropriate time. Has an effect.

  And in this embodiment, it comprised so that the reference | standard driving | operation time in a wind drying process may be temporarily set according to the cloth amount determination before the clothing gets wet with water at the time of a washing operation start. Thereby, it is considered that the time required for drying in the wind drying process increases with an increase in the amount of cloth, and therefore it is possible to appropriately temporarily set the reference operation time. In the present embodiment, the remaining operation time is extended or shortened with respect to the reference operation time based on the amount of change in the detected weight during the initial period of the wind drying process. Thereby, a wind drying process can be performed in an appropriate operation time.

  Furthermore, in this embodiment, the number of rotations of the drum 10 during the loosening operation of the wind drying process is set such that a part of the clothing remains stuck in the drum 10 and the remaining part of the clothing is peeled off. It was set as the predetermined rotation speed (for example, 50 rpm). As a result, a part of the clothing remains stuck in the drum 10 by the unwinding operation, and a space in which the position of the separated clothing is replaced can be secured. Therefore, by setting the number of rotations of the drum 10 during the unraveling operation to a predetermined number, the clothes can be effectively unraveled and agitated, and as a result, uniform drying can be promoted.

  In addition, the rotation of the drum 10 is stopped for a certain time when switching from the dehydrating operation to the unwinding operation. As a result, at least a part of the clothing adhered to the inner peripheral surface of the drum 10 in the dehydrating operation can be dropped from the drum 10 and the replacement of the clothing can be promoted.

(2) Second Embodiment FIG. 6 shows a second embodiment, which is different from the first embodiment in the following points. That is, the control device 6 detects the unbalanced state of the drum 10 based on the detection signal of the vibration sensor 26 when executing the wind drying process. Then, when the unbalanced state of the drum 10 is detected during the dehydrating operation, the control device 6 extends the temporarily set operation time. In the present embodiment, the time for one dehydration operation being executed is extended from 30 minutes to 10 minutes, for example, to 40 minutes.

  FIG. 6 shows an example of how the rotational speed of the drum 10 fluctuates when an unbalanced state occurs during one dehydration operation. Here, it is shown that an unbalanced state has occurred at time T1 in the middle of increasing the rotational speed of the drum 10 to 1200 rpm during the dehydrating operation, and the rotational speed of the drum 10 has not increased smoothly due to this. Yes. In this case, the unbalanced state is canceled after a certain time, and the rotation speed of the drum 10 can be increased to 1200. In such a case, the temporarily set operation time is extended by 10 minutes.

  Here, when an unbalanced state of the drum 10 is generated, there is a bias in the clothes attached to the inner peripheral surface of the drum 10 and the drum 10 is not dried evenly. Therefore, at the time of detecting the unbalanced state, the operation time can be extended to prevent the process from being finished in the undried state, and the drying can be appropriately completed.

  Although not shown, the control device 6 temporarily stops the operation of the washing / drying machine 1 when the number of times of detection of the unbalanced state becomes a predetermined number of times, for example, five times or more during one dehydration operation. At the same time, a notification to that effect is given to the user through a display on the operation panel 5, a buzzer, or the like. Thereafter, when the user performs a restart operation on the operation panel 5, the remaining wind drying process is executed.

  As described above, when the unbalanced state is repeated many times, the operation is temporarily stopped and the user is notified, so that the unbalanced state can be canceled by the user's hand and then restarted. As a result, it is possible to prevent the operation time from being repeatedly extended due to repeated extension of the operation time.

(3) Third Embodiment FIG. 7 shows a third embodiment. In the third embodiment, the control device 6 determines the number of rotations of the drum 10 during the loosening operation according to the cloth amount determination before the clothes get wet with water at the start of the washing operation when performing the wind drying process. The higher the amount of cloth, the higher the control. Specifically, when the amount of cloth is large (5 kg or more), the rotational speed of the drum 10 during the unwinding operation is set to 80 rpm, for example, as shown by a solid line in FIG. When the result of the cloth amount determination is normal and small (less than 5 kg), as indicated by a broken line in FIG. 7, the rotation speed of the drum 10 during the loosening operation is set to 50 rpm.

  Further, in the present embodiment, in the wind drying process, the rotation direction of the drum 10 is set to one direction (for example, the positive direction) in both the dewatering operation and the unwinding operation. At the same time, when there are many results of the cloth amount determination, the rotational speed is decreased without temporarily stopping the drum 10 when shifting from the dewatering operation to the unwinding operation and when shifting from the unwinding operation to the dewatering operation. And it is supposed to raise.

  Here, when the amount of clothes in the drum 10 is standard or small, the clothes in the drum 10 can be easily removed even if the drum 10 is driven at a relatively low rotational speed and in a short cycle in the loosening operation. It is possible to easily obtain a uniform drying effect. On the other hand, when the amount of clothes in the drum 10 is large, at such a low rotational speed, the replacement of clothes is not promoted and there is a possibility that the loosening may not be performed satisfactorily. Therefore, the larger the determined cloth amount, the better the unwinding operation can be performed by increasing the number of rotations of the drum 10 in the unwinding operation.

  In addition, when switching between the dehydrating operation and the unwinding operation, the drum 10 is not stopped once, but the rotation of the drum 10 is maintained and the next operation is shifted to balance the drum 10 in the next operation. It becomes easy and the advantage that generation | occurrence | production of an balance state can be suppressed can be acquired. Note that the number of rotations of the drum 10 in the loosening operation when the amount of cloth is large is not fixed at 80 rpm, but may be varied up and down in the range of 50 to 80 rpm, for example, during one unwinding operation. .

(4) Fourth Embodiment FIG. 8 shows a fourth embodiment, and shows how the rotational speed of the drum 10 varies under the control of the control device 6 in the air drying process. In this embodiment, the control device 6 stops the rotation of the drum 10 for a certain period of time in at least one unwinding operation among a plurality of unwinding operations during the air drying process. Specifically, for example, the dehydrating operation at 1200 rpm and the unraveling operation at 80 rpm are alternately repeated three times, then the dehydrating operation at 1200 rpm is performed, the drum 10 is stopped once (0 rpm), and then at 50 rpm. Perform a loosening action.

  According to this, at the time of switching from the dehydrating operation to the unwinding operation, the rotation of the drum 10 is stopped for a certain period of time, so that the clothes adhered to the inner peripheral surface of the drum 10 by the dehydrating operation can be dropped. As a result, it becomes possible to promote uniform drying. In this case, the effect can be obtained by stopping the drum 10 in at least one unwinding operation among a plurality of times.

(5) Fifth Embodiment and Other Embodiments FIG. 9 shows a fifth embodiment. In the fifth embodiment, when executing the wind drying process, the control device 6 determines the rotation speed of the drum 10 during the dehydrating operation according to the cloth amount determination before the clothes get wet with water at the start of the washing operation. The higher the amount of cloth, the higher the control. Specifically, when the amount of cloth is less than 5 kg, the rotational speed of the drum 10 is 1200 rpm, and when it is 5 kg or more, the rotational speed of the drum 10 is 1300 rpm.

  If the number of rotations of the drum 10 in the dehydrating operation is increased, the amount of clothing sticking to the inner peripheral surface of the drum 10 due to the centrifugal force increases, and a large space in the center of the drum 10 can be secured. Therefore, even when the amount of cloth is large, by blowing air through the space formed in the center of the drum 10, it is possible to prevent the drying efficiency from being lowered and to promote good drying.

  In addition, although not illustrated, as another embodiment, it can also be configured as follows. That is, in the first embodiment and the like, the initial period in the wind drying process is a fixed period (about 20 minutes). However, as the amount of cloth increases as the cloth amount is determined at the start of the washing operation. The number or frequency of weight detection in the initial period may be increased, in other words, the number of loosening operations may be increased. For example, when the amount of cloth is standard or small (less than 5 kg), the initial period is about 20 minutes, that is, the number of unwinding operations (weight detection) is four times, and when the amount of cloth is large (more than 5 kg), the initial period Is 30 minutes, and the number of unwinding operations (weight detection) can be six.

  Here, when the amount of clothes in the drum 10 is large, the variation in the amount of moisture decrease during the dehydration operation tends to be relatively large, and when the amount of cloth is small, the variation is small. Therefore, as the amount of cloth increases, the number of weight detections or frequency is increased, so that a more accurate change in weight can be detected, and a more appropriate operation time can be set. When the amount of cloth is small, an appropriate operation time can be set even with a relatively small number of times or frequency of weight detection.

  Further, in the first embodiment described above, the rotation speed of the drum 10 during the unwinding operation is set to a predetermined rotation speed (a part of clothing is stuck in the drum 10 and the rest is peeled off throughout the entire air drying process. 50 rpm). On the other hand, in the first half of the wind drying process, the rotational speed of the drum 10 during the unwinding operation is lower, and in the second half of the wind drying process, the rotational speed of the drum 10 during the unwinding operation is set to a predetermined rotational speed. May be.

  In this case, in the first half of the wind drying process, since the clothes contain a lot of moisture, the clothes are less bulky, the space in the drum 10 is large, and the clothes are easily stirred. In the second half of the wind drying process, the drying of the clothing proceeds, the apparent volume of the clothing increases, and the space in the drum 10 becomes smaller. Therefore, in the second half of the wind drying process, by relatively increasing the number of rotations of the drum 10, it is possible to easily secure a space for clothes to be replaced in the drum 10, and thus drying can be favorably performed. it can.

  In addition, specific numerical values such as the number of revolutions of the drum, the operation time, the number of repetitions, and the amount of cloth in the air drying process are merely shown as examples, and various changes can be made. . Furthermore, various changes can be made to the hardware configuration of the washing / drying machine. For example, the air inlet provided in the water tank 7 may be provided on the front side or the upper surface side of the water tank 7 (housing 2). The exhaust port may also be provided on the back side of the water tank 7 (housing 2).

  In the first embodiment, the cover 23 covering the washing machine motor 9 and the air inlet 19 is provided. However, the cover may be omitted and the air inlet may be exposed on the back surface of the water tank. At this time, if the intake port is located around the washing machine motor, the air heated by the washing machine motor can be supplied into the water tank. In each of the above embodiments, the washing machine motor 9 is provided on the back surface of the water tub and the drum is directly rotated. However, the washing machine motor is provided on the bottom of the housing and the like, and the belt transmission mechanism is used. It is good also as a structure which rotationally drives a drum. In this case as well, relatively warm air can be used for drying if the air flow around the washing machine motor is sucked from the air inlet so as to obtain a wind flow.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a washing dryer, 2 is a housing, 6 is a control device (drying operation control device), 7 is a water tank, 9 is a washing machine motor (drive device), 10 is a drum, 19 is an air inlet, and 20 is An exhaust port, 25 is a current sensor (cloth amount determination means), and 26 is a vibration sensor (unbalance detection means).

Claims (12)

A water tank having an air inlet and an air outlet;
A drum provided in the water tank so as to be rotatable around a horizontal axis and having a plurality of holes;
A driving device for rotating the drum;
As the drum is rotated by controlling the driving device, air sucked into the water tank from the air intake port through the drum due to the flow of wind generated by the rotation of the drum passes from the exhaust port to the outside of the water tank through the drum. A drying operation control device for performing a wind drying process for exhausting and drying clothes in the drum,
In the wind drying process, the drying operation control device repeatedly performs a dehydrating operation for rotating the drum at a predetermined rotation speed and a unwinding operation for rotating the drum at a lower speed than the predetermined rotation speed. With
During the unwinding operation in the initial period from the start of the air drying process to the passage of a predetermined time, the weight of the clothes including moisture in the drum is detected, and based on the detected change in weight over time A washing dryer that sets the remaining operation time for the wind drying process. A cloth amount determining means for determining a cloth amount of the clothes in the drum;
The washing / drying machine according to claim 1, wherein the drying operation control device temporarily sets a reference operation time in the wind drying process according to the amount of cloth determined by the cloth amount determining means.   When the change amount of the detected weight in the initial period is relatively large, the drying operation control device makes the remaining operation time of the wind drying process shorter than the temporarily set operation time, and the change amount of the detected weight is compared. 3. The washing and drying machine according to claim 1 or 2, wherein when the target is small, the remaining operation time of the wind drying process is made longer than the temporarily set operation time. A cloth amount determining means for determining a cloth amount of the clothes in the drum;
4. The dry operation control device according to claim 1, wherein the number of times or the frequency of weight detection in the initial period is increased as the amount of cloth is increased in accordance with the amount of cloth determined by the cloth amount determination unit. The washing dryer according to one item. Comprising unbalance detection means for detecting an unbalanced state of the drum,
5. The drying operation control device according to claim 1, wherein when the unbalance state is detected by the unbalance detection unit during the dehydration operation, the drying operation control device extends the set operation time. Washing and drying machine.   6. The washing and drying machine according to claim 5, wherein the drying operation control device stops the operation and notifies when the number of times of detection of the unbalanced state by the unbalance detection means is equal to or greater than a predetermined number during the dehydration operation. .   The drying operation control device sets the rotation speed of the drum during the unwinding operation to a predetermined rotation speed such that a part of the clothing remains stuck in the drum and the remaining part of the clothing is peeled off. The washing / drying machine according to any one of claims 1 to 6.   The washing / drying machine according to claim 7, wherein the drying operation control device sets the number of rotations of the drum during the unwinding operation to a predetermined number of rotations in the latter half of the wind drying process. A cloth amount determining means for determining a cloth amount of the clothes in the drum;
The drying operation control device controls the number of rotations of the drum during the unraveling operation so that the number of rotations is increased as the amount of cloth increases, according to the amount of cloth determined by the cloth amount determination unit. Item 9. The washing and drying machine according to any one of Items 1 to 8.   The washing operation according to any one of claims 1 to 9, wherein the drying operation control device stops the rotation of the drum for a predetermined time in at least one unwinding operation among a plurality of unwinding operations during a wind drying process. Dryer.   The said drying operation control apparatus is a washing-drying machine as described in any one of Claim 1 to 10 which stops rotation of the said drum for a fixed time at the time of switching to the said spin-drying | dehydration operation | movement and a loosening operation | movement in a wind drying process. A cloth amount determining means for determining a cloth amount of the clothes in the drum;
The drying operation control device sets the number of rotations of the drum in the dehydrating operation in the wind drying process so that the number of rotations increases as the amount of cloth increases, according to the amount of cloth determined by the cloth amount determination unit. The washing / drying machine according to any one of claims 1 to 11.

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