JP2006204428A - Drum type washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent uneven drying and creasing of laundry as mush as possible and improve the finishing by accurately detecting entangled state of the laundry in a drum in a drying operation in a drum type washing/drying machine. <P>SOLUTION: This washing/drying machine normally/inversely rotates the drum at a rotating speed of 50 rpm in the drying process. Then, the rotating speed of the drum is detected by a rotation sensor, and when the detected rotating speed A exceeds a threshold B1 or B2 (refer to a chain double-dashed line) set to the set rotating speed of 50 rpm, this machine determines that the laundry is entangled in the drum and performs a disentangling process. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drum-type washing and drying machine configured to rotate a drum during a drying operation.

  2. Description of the Related Art Conventionally, in a drum-type washing and drying machine, the rotating shaft of the drum has a horizontal axis shape, and during the drying operation for drying the laundry stored in the drum, hot air is supplied into the drum and the drum Was rotated while repeating forward rotation and reverse rotation alternately. Conventionally, this type of drum-type washing / drying machine has no function of detecting the entanglement state of the laundry in the drum during the drying operation.

On the other hand, in a washing / drying machine having a vertical axis of a tank for storing laundry (washing and dehydrating tank), the rotating blade (pulsator) at the bottom of the tank is rotated or rotated together with the tank during the drying operation. In this drying operation, the entanglement state of the laundry in the tub is detected by the cloth entanglement detecting means, and when it is detected that the cloth is in an entanglement state, a loosening process is performed. (For example, refer to Patent Document 1). In this case, as the fabric entanglement detecting means, a non-contact displacement sensor using a laser or the like is provided outside the water tub (outer tub) containing the washing and dewatering tub, and the swaying degree of the water tub is determined by the non-contact displacement sensor. By detecting it, the cloth-entangled state is detected.
JP 2001-276470 A

  The conventional drum-type washing and drying machine does not have a function to detect the entanglement state of the laundry in the drum during the drying operation. Therefore, if the drying operation proceeds while the laundry is entangled, the detection accuracy of the drying state is unstable. However, there is a problem that uneven drying tends to occur and wrinkles of the laundry after drying become severe.

  On the other hand, in a washing / drying machine having a vertical axis of a tub (laundry and dewatering tub) for storing the laundry, the tangled state of the laundry in the tub is shown by a non-contact displacement sensor. Since the detection means is based on detecting the degree of shaking of the aquarium using a laser or the like, the cloth entangled state may not be detected depending on the direction of shaking of the aquarium, and the detection accuracy of the cloth entangled state is low. There are drawbacks. Further, even if this technique is applied to a drum type washing and drying machine as it is, there is a drawback that the accuracy of detecting the fabric entanglement state is still low.

  The present invention has been made in view of the above circumstances, and its purpose is to accurately detect the entangled state of the laundry in the drum during the drying operation, and to prevent the occurrence of drying unevenness and wrinkles in the laundry. An object of the present invention is to provide a drum-type washing and drying machine that can prevent as much as possible and improve the finish.

  In order to achieve the above-mentioned object, the invention of claim 1 is characterized in that a drum arranged in a horizontal axis in a water tub and into which laundry is put, driving means for rotationally driving the drum, and during a drying operation A drum type washer / dryer comprising a warm air supply means for supplying warm air into the drum and configured to rotate the drum during the drying operation; a speed detection means for detecting a rotation speed of the drum; Cloth entanglement determining means for determining an entanglement state of the laundry in the drum based on a change in the rotation speed detected by the speed detection means with respect to the set rotation speed of the drum during operation, and the cloth entanglement determination means is in the cloth entanglement state. And a control means for executing a loosening process when it is determined.

  In order to achieve a similar object, the invention of claim 2 is characterized in that a drum arranged in a horizontal axis in a water tub and into which laundry is put, a motor for rotationally driving the drum, A drum-type washing / drying machine configured to rotate the drum during the drying operation, and to detect a driving current of the motor when the drum rotates Means for determining the entanglement state of the laundry in the drum based on the fluctuation of the current value detected by the current detection means with respect to the set current value of the motor during the drying operation, And a control means for executing a loosening process when it is determined that the entanglement state has occurred.

  According to the first aspect of the present invention, in the drum-type washing and drying machine, the cloth entanglement state of the laundry in the drum during the drying operation is determined based on the fluctuation of the rotation speed detected by the speed detection means with respect to the set rotation speed of the drum. As a result, the fabric entanglement state can be detected regardless of the direction of shaking of the aquarium, and therefore the fabric entanglement state can be accurately determined as compared with the case of using a conventional non-contact displacement sensor. . Then, when it is detected that the cloth is entangled, the unwinding process is executed, so that the entangled state of the laundry can be loosened, and the occurrence of uneven drying and wrinkles of the laundry can be prevented as much as possible. Can be improved.

  According to the invention of claim 2, in the drum type washing and drying machine, the entangled state of the laundry in the drum during the drying operation is detected current value by the current detecting means with respect to the set current value of the motor that rotationally drives the drum. As in the first aspect of the invention, the cloth entanglement state can be detected regardless of the shaking direction of the aquarium, and therefore the conventional non-contact displacement sensor is used. As compared with the above, the cloth-entangled state can be accurately determined. And when it detects that it is a cloth entanglement state, it can loosen the entanglement state of a laundry like the invention of Claim 1, and generation | occurrence | production of the drying unevenness and wrinkle of a laundry are performed. Can be prevented as much as possible, and the finish can be improved.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
First, FIG. 2 shows a longitudinal sectional view of the entire drum type washing and drying machine. In FIG. 2, a laundry entrance / exit 2 is formed at the center of the front portion (right side in FIG. 2) of the outer box 1 forming the outer shell of the drum type washing / drying machine. A door 3 that opens and closes is provided. An operation panel 4 is provided at the upper part of the front portion of the outer box 1, and this operation panel 4 is for the user to perform various operations related to the operation of the washing / drying machine. A number of operation switches (not shown) such as switches and various selection switches are provided. An operation circuit unit 7 is disposed on the back side of the operation panel 4 (the upper back surface of the front portion of the outer box 1), and a control circuit unit 8 is disposed on the back side of the lower portion of the front portion of the outer box 1. Yes.

A water tank 9 is disposed inside the outer box 1. The water tank 9 has a cylindrical drum shape, and is arranged in an oblique horizontal axis shape in which the axial direction is front and rear (left and right in FIG. 2), and is inclined forward (upward to the right in FIG. 2). It is supported by a pair of left and right elastic support devices 10 (only one is shown).
Inside the water tank 9, a drum 11 that is a tank for storing laundry is disposed. This drum 11 also has a cylindrical drum shape, and is arranged coaxially with the water tank 9 (axial direction is front and rear, and further, is an oblique horizontal axis that is inclined upward). The drum 11 also functions as a washing tub, a dewatering tub, and a drying tub. Due to this, a large number of small holes 12 that are water holes and vent holes are formed in almost the entire body (see FIG. 2), a plurality of baffles 13 for picking up laundry are provided on the inner periphery of the trunk (only one is shown).

  Both the water tub 9 and the drum 11 have openings 14 and 15 for putting in and out the laundry on the front surface, and the opening 14 of the water tub 9 is a laundry 16 in the outer box 1 by the bellows 16. The opening 15 of the drum 11 faces the opening 14 of the water tank 9. A motor 17 is disposed on the back surface of the water tank 9 as a driving means for rotationally driving the drum 11. In this case, the motor 17 is an outer rotor type DC brushless motor, and the stator 17 a is attached to the back surface of the water tank 9. The rotating shaft 17c attached to the center of the rotor 17b is inserted into the water tank 9, and its front end is attached to the center of the back of the drum 11. In this case, the drum 11 is directly rotated by the rotor 17b of the motor 17.

  A water reservoir 18 that communicates with the inside of the water tank 9 is attached to the lower surface of the water tank 9, and a heater 19 for heating the washing water is disposed inside the water reservoir 18. A drainage hose 21 is connected to the rear of the water reservoir 18 via a drainage valve 20 so that the washing water in the water tank 9 and thus in the drum 11 is discharged through these.

  On the other hand, a hot air supply device 24 (hot air supply means) including a blower 22 and a heater 23 is disposed on the upper portion of the water tank 9. Among them, the blower 22 is configured by providing a blower blade 25 a inside the casing 25 and providing a fan motor 26 that rotationally drives the blower blade 25 a outside the casing 24. Further, the heater 23 is configured by providing a warm air generating heater 28 inside a case 27, and an inlet portion on the rear side of the case 27 communicates with an outlet portion on the front side of the casing 24 of the blower 22.

  An air supply pipe 29 is disposed at the front of the upper part of the water tank 9. One end portion of the air supply pipe 29 communicates with the outlet portion of the heater 23 on the front side of the case 27, and the other end portion penetrates around the opening portion 14 of the water tank 9 and faces the opening portion 14. It is out. On the back surface of the water tank 9, a duct 30 for a heat exchanger that constitutes an air passage is disposed. The duct 30 has a hollow shape and is disposed on one side (left side as viewed from the rear) of the motor 17, the lower end portion communicates with the inner lower portion of the water tank 9, and the upper end portion is the blower. 22 casings 24 are communicated.

  In this configuration, when the blower 22 is actuated, as indicated by an arrow X in FIG. 2, the air in the drum 11 passes between the water tank 9 and the drum 11 from the small hole 12 and is ducted from the lower part of the water tank 9. After entering the inside 30 and passing through the inside of the duct 30 from the lower part to the upper part, the air passes through the blower 22, the heater 23, and the air supply pipe 29 in order, and is returned to the drum 11 from the opening 14 of the water tank 9. In this way, the air in the drum 11 is circulated, and the duct 30, the casing 24 of the blower 22, the case 27 of the heater 23, and the air supply pipe 29 constitute a circulation path. At this time, when the circulated air is heated by the hot air generating heater 28 of the heater 23, the hot air is supplied into the drum 11.

  A water injector 32 is disposed in the upper part of the duct 30. Although not shown in detail, the water injector 32 extends over almost the entire width of the duct 30, for example, has a large number of fountain ports on the lower side, and has a base end located outside the duct 30, It is connected to the water supply valve 34 through the water injection connecting pipe 33. The water supply valve 34 switches water supplied from a water supply source such as a water supply to a plurality of water diversion channels. One water diversion channel is the water injection connecting pipe 33 and the other water diversion channel is a water supply connecting pipe 36. And the front-end | tip part of this connection pipe 36 for water supply is connected to the water supply case 37 (refer to a dashed-two dotted line) arrange | positioned above the front part of the said water tank 9. FIG. The water supply case 37 supplies water sent from the water supply valve 34 through the water supply connection pipe 36 into the water tank 9. The water supply valve 34 and the drain valve 20 are both electrically operated and opened by an electric driving force such as an electromagnet or a motor.

  On the other hand, in FIG. 3, the electrical configuration of the part related to the gist of the present invention is shown by blocks. The control device 38 is composed mainly of a microcomputer and is provided in the control circuit unit 8 and functions as a control means for controlling the overall operation of the washing / drying machine. Various operation signals are input to the control device 38 from a switch input unit 39. The switch input unit 39 includes various operation switches of the operation panel 4 and the operation circuit unit 7 that responds to the operations. The switch input unit 39 outputs various operation signals based on operations of the various operation switches. Yes.

  In addition, the control device 38 receives a water level detection signal from a water level sensor 40 provided to detect the stored water level in the water tank 9 (retained water level in the drum 11) to detect the rotational speed of the motor 17. A rotation detection signal is input from a rotation sensor 41 provided, and a temperature detection signal is input from a temperature sensor 42 provided to detect the temperature of air (circulation wind) passing through the circulation path. Among these, the rotation sensor 41 is composed of a magnetic sensor, for example, a Hall element, and is configured to detect the rotational speed of the rotor 17b based on detecting the magnetic change of the rotor magnet based on the rotation of the rotor 17b. A speed detecting means for detecting the rotational speed of the drum 11 is configured.

  The control device 38 provides a drive control signal to the inverter circuit 43 that drives the motor 17 based on those inputs and a previously stored control program. Drive control signals are given to the heater 19 for heating, the fan motor 26 of the blower 22, the heater 28 for generating hot air of the heater 23, and the drive circuit 44 for driving the drain valve 20. In this case, the control device 38 entangles the laundry in the drum 11 based on the fluctuation of the rotational speed detected by the rotation sensor 41 with respect to the rotational speed of the motor 17 and the drum 11 in the drying process (drying operation) described later. It also functions as a fabric entanglement determining means for detecting.

Next, the operation of the above configuration will be described.
When performing normal washing, the user opens the door 3, puts the laundry into the drum 11 from the laundry entrance 2, and then closes the door 3 and operates the operation switch on the operation panel 4. By doing so, the power is turned on and the laundry course is selected to start the operation. In this case, it is assumed that the standard course is selected. The standard course is performed from washing to drying.

  In the standard course, the control device 38 first enters the washing process of the washing process. In the washing process, first, the water level is set according to the volume of the laundry, and the water supply connecting pipe 36 side of the water supply valve 54 is opened. As a result, water supplied from a water supply source such as a water supply through the water supply valve 54 is supplied from the water supply connection pipe 36 through the water supply case 37 and stored in the water tank 9. In addition, detergent is put in the water supply case 37 in advance, and the introduced detergent is supplied into the water tank 9 and thus into the drum 11 together with the above-mentioned water supply.

  In this situation, the control device 38 closes the water supply valve 34 when it is determined by the detection output from the water level sensor 40 that the stored water level in the water tank 9 (in the drum 11) has reached a predetermined water level. The water supply into the aquarium 9 is finished. Thereafter, the control device 38 activates the motor 17. Thereby, the drum 11 is rotated integrally with the rotating shaft 17c of the motor 17, and the laundry accommodated therein is stirred and washed. Note that the rotation of the drum 11 at this time is performed by switching in both forward and reverse directions. Thereafter, the control device 38 opens the drain valve 20. As a result, water in the water tank 9 (in the drum 11) is discharged from the drain valve 20 through the drain hose 21 to the outside of the apparatus.

  After that, the control device 38 closes the drain valve 20 and finishes draining from the water tank 9. The washing process includes a rinsing process in addition to the above washing process, and the control device 38 performs the rinsing process after the washing process. This rinsing step is performed in the same manner as the washing step, except that no detergent is used to wash the laundry. After the rinsing process, a dehydration process is performed. In the dehydration process, the water in the laundry in the drum 11 is spun off from the small hole 12 by centrifugal force by rotating the drum 11 at high speed in one direction by the motor 17 with the drain valve 20 opened. is there.

  After the dehydration process, a drying process (drying operation) is performed. This drying process will be described with reference to the flowchart of FIG. When the drying process starts, the control device 38 first starts heating (step S1). Here, the motor 17 is activated to rotate the drum 11 and the blower 22 and the heater 23 of the hot air supply device 24 are operated. In this case, as shown in FIG. 5, the rotation of the drum 11 is repeated such that the forward rotation is performed for 30 seconds, then temporarily stopped, and the reverse rotation is performed for 30 seconds. The rotation speed of the drum 11 at this time is set to 50 rpm for both forward rotation and reverse rotation. When the blower 22 and the heater 23 of the hot air supply device 24 are operated, the generated hot air is supplied into the drum 11 and circulated through the circulation path (see arrow X in FIG. 2). The laundry in the drum 11 is dried by the warm air.

  Next, heat exchange is started (step S2). Here, the water injection connecting pipe 33 side of the water supply valve 54 is opened. Then, water supplied from a water supply source such as a water supply through the water supply valve 54 is sent from the water injection connecting pipe 33 to the water injector 32, and from the water injector 32 into the duct 30 in the direction opposite to the flow of the circulating wind. Inject water. Thereby, in the duct 30, circulating air is cooled and dehumidified.

  Next, the control device 38 compares the rotation speed detected by the rotation sensor 41 (corresponding to the actual rotation speed of the drum 11) with a threshold for the set rotation speed (in this case, 50 rpm), and the fluctuation range of the detected rotation speed is It is determined whether or not it is within the threshold (step S3). Here, in a state where there is almost no fabric entanglement in the laundry in the drum 11, as shown by the solid line A in FIG. 1, the rotation speed detected by the rotation sensor 41 varies slightly, but the range between the threshold values B1 and B2. Within (threshold). FIG. 1 shows an example in which the drum 11 (motor 17) is rotated in the normal rotation direction at 50 rpm. Therefore, when the rotation speed A detected by the rotation sensor 41 is within the upper and lower threshold values B1 and B2, the control device 38 determines that there is no fabric entanglement and proceeds to step S4 to detect dryness. Dryness detection is determined by a detection signal from a temperature sensor 42 that detects the temperature of the circulating air. In step S5, it is determined whether or not the temperature detected by the temperature sensor 42 satisfies the drying detection condition. If not, the process returns to step S3.

  By the way, when the laundry in the drum 11 is entangled during this drying process and a fabric entanglement occurs, as shown by a two-dot chain line C in FIG. . When it is determined in step S3 that the rotation speed detected by the rotation sensor 41 exceeds the threshold value B1 or B2, the control device 38 determines that a fabric entanglement has occurred in the drum 11 and proceeds to step S6 for loosening. Run the journey.

  In the loosening process, as shown in FIG. 6, the rotation speed of the drum 11 (motor 17) is increased to 70 rpm, which is higher than the normal rotation speed of the drying process, 50 rpm, and the maintenance time in the forward rotation direction and the reverse rotation direction is increased. This is carried out by rotating in the forward and reverse directions shorter (15 seconds) than the normal case (30 seconds) of the drying process. In this case, by increasing the rotation speed of the drum 11 to 70 rpm, which is higher than the normal rotation speed of the drying process, 50 rpm, the tangled laundry in the drum 11 is easily pulled away. In addition, the tangled laundry in the drum 11 can be easily separated by rotating forward and backward in a cycle shorter than the normal cycle of the drying process. By performing this unwinding process, the fabric entanglement in the laundry in the drum 11 is eliminated as much as possible. The unwinding process is performed for a predetermined time (for example, 5 minutes), and when it has elapsed (steps S6 and S7), the process returns to step S3 to determine again whether or not there is a cloth-entangled state. In step S3, the rotation of the drum 11 is returned to the normal state of the drying process (see FIG. 5).

  In step S5, when it is determined that the temperature detected by the temperature sensor 42 is equal to or higher than the predetermined temperature and the drying detection condition is satisfied, the process proceeds to step S8, and a finishing drying process is performed. In this finish drying process, the drum 11 is continuously rotated in the forward and reverse directions, and the operation of the blower 22 and the heater 23 of the hot air supply device 24 and the water injection of the water injector 32 for heat exchange are continued for 10 minutes. Is called.

  When the finish drying process is completed, the process proceeds to step S9 and a cooling process is performed. In this cooling process, except for stopping the operation of the heater 23 (warm air generating heater 28) of the hot air supply device 24, the drum 11 is continuously rotated in the forward and reverse directions and the warm and warm operation is continued. The operation of the blower 22 of the wind supply device 24 and the water injection of the water injector 32 for heat exchange are continued for 10 minutes. When this cooling process ends, the drying process ends. This completes the standard course from washing to drying.

  In the embodiment described above, the following effects can be obtained. First, in the drum-type washing / drying machine, the cloth-entangled state of the laundry in the drum 11 during the drying process (drying operation) is determined based on the fluctuation of the rotation speed detected by the rotation sensor 41 with respect to the set rotation speed of the drum 11. Therefore, the cloth entangled state can be detected regardless of the shaking direction of the water tank 9, and therefore the cloth entangled state can be accurately determined as compared with the case where a conventional non-contact displacement sensor is used. . Then, when it is detected that the cloth is entangled, the unwinding process is executed, so that the entangled state of the laundry can be loosened, and the occurrence of uneven drying and wrinkles of the laundry can be prevented as much as possible. Can be improved.

In the loosening process, the fabric entanglement can be effectively loosened by making the rotational speed of the drum 11 faster (70 rpm) than the normal rotational speed (50 rpm) during the drying process. Further, in the loosening process, the fabric entanglement can be effectively loosened by performing the forward / reverse rotation period of the drum 11 in a shorter period than the normal state during the drying process.
Drying detection is not performed during the unwinding process. Incidentally, since the temperature of the circulating air is likely to change during the unwinding process, there is a situation where false detection is likely to occur if dryness is detected during the unwinding process. In this respect, in the present embodiment, since the dryness detection is not performed during the loosening process, it is possible to prevent erroneous detection.

(Second embodiment)
7 and 8 show a second embodiment of the present invention. This second embodiment differs from the first embodiment described above in terms of means for determining the fabric entanglement state. That is, a current detection circuit 45 (current detection means) that detects a drive current of the motor 17 that rotates the drum 11 is provided, and a detection signal of the current detection circuit 45 is input to the control device 46 (control means). ing. In this case, the control device 46 entangles the laundry in the drum 11 based on the fluctuation of the detected current of the current detection circuit 45 with respect to the set current value of the motor 11 that rotationally drives the drum 11 in the drying process (drying operation). It also functions as a fabric entanglement determining means for detecting the state.

  FIG. 8 shows fluctuations in the detected current value of the current detection circuit 45 when the motor 17 that rotationally drives the drum 11 is rotated in the normal rotation direction at 50 rpm during the drying process. Here, in a state where there is almost no fabric entanglement in the laundry in the drum 11, as shown by a solid line D in FIG. 8, the detected current value of the current detection circuit 45 varies slightly, but the set current value (0 .3A) is within the upper and lower thresholds B3 and B4. On the other hand, when the laundry in the drum 11 is entangled and a fabric entanglement occurs, as shown by the two-dot chain line E in FIG. When it is determined that the detected current value of the current detection circuit 45 exceeds the threshold value B3 or B4, the control device 46 determines that a fabric entanglement has occurred in the drum 11 and executes the loosening process. The loosening process is the same as in the first embodiment.

  In the second embodiment described above, in the drum type washing / drying machine, the current detection circuit 45 detects the entanglement state of the laundry in the drum 11 during the drying process with respect to the set current value of the motor 17 that rotationally drives the drum 11. Since the determination is made based on the fluctuation of the current value, the cloth entanglement state can be detected regardless of the direction of shaking of the water tank, as in the first embodiment, and thus a conventional non-contact displacement sensor is used. Compared to the case, the fabric entanglement state can be accurately determined. And when it detects that it is in a cloth entanglement state, it can loosen the entanglement state of the laundry like the 1st example by performing the loosening process, and the generation of the drying unevenness and wrinkle of the laundry It can prevent as much as possible, and can improve the finish.

(Other examples)
9 and 10 show a modification of the rotation control of the motor 17 during the loosening process of the drying process.
Among these, in the example of FIG. 9, when performing the loosening stroke, the motor 17 is first started up at 50 rpm in the forward rotation direction, raised from 50 rpm to 70 rpm in 15 seconds, and then the motor 17 is stopped. Next, the motor 17 is started up at 50 rpm in the reverse direction, raised from 50 rpm to 70 rpm in 15 seconds, and then the motor 17 is stopped.
In the example of FIG. 10, the rotation speed of the motor 17 is 50 rpm, which is the same as that in the normal drying process, but the maintenance time in the normal rotation and the reverse rotation is longer than that in the normal drying process (30 seconds). It is short (15 seconds) and has a short period.

The 1st Example of this invention is a figure which shows the fluctuation | variation of the detected rotational speed at the time of the forward rotation of the motor at the time of a drying process. Longitudinal side view of drum-type washer / dryer Block diagram showing electrical configuration Flow chart showing control details of drying process The figure which shows the change of the rotational speed of the motor in the drying process The figure which shows the change of the rotational speed of the motor in the loosening process FIG. 3 equivalent view showing a second embodiment of the present invention. Diagram showing fluctuations in motor drive current during the drying process FIG. 6 equivalent diagram showing a modified example of the rotation control of the motor in the loosening process FIG. 6 equivalent view showing a different modification of the rotation control of the motor in the loosening process

Explanation of symbols

  In the drawings, 9 is a water tank, 11 is a drum, 17 is a motor (drive means), 24 is a hot air supply device (hot air supply means), 38 is a control device (control means, cloth entanglement determination means), and 41 is a rotation sensor. (Speed detection means), 45 is a current detection circuit (current detection means), and 46 is a control device (control means, cloth entanglement determination means).

Claims (3)

A drum arranged in a horizontal axis in the water tank and loaded with laundry; a driving means for rotationally driving the drum; and a hot air supply means for supplying hot air into the drum during a drying operation. In the drum type washing and drying machine configured to rotate the drum during the drying operation,
Speed detecting means for detecting the rotational speed of the drum;
A fabric entanglement determining means for determining an entanglement state of the laundry in the drum based on a change in the rotation speed detected by the speed detection means with respect to a set rotation speed of the drum during a drying operation;
A drum-type washing / drying machine comprising: control means for executing a loosening step when it is determined that the cloth-entanglement means is in a cloth-entanglement state. A drum that is arranged in a horizontal axis in the water tank and into which laundry is put, a motor that rotationally drives the drum, and hot air supply means that supplies hot air into the drum during a drying operation, In the drum-type washing and drying machine configured to rotate the drum during the drying operation,
Current detection means for detecting a drive current of the motor when the drum rotates;
Cloth entanglement determining means for determining the entanglement state of the laundry in the drum based on the fluctuation of the detected current value by the current detecting means with respect to the set current value of the motor during the drying operation;
A drum-type washing / drying machine comprising: control means for executing a loosening step when it is determined that the cloth-entanglement means is in a cloth-entanglement state. The drum-type washing and drying machine according to claim 1 or 2, wherein in the loosening step, the rotation speed of the drum is set to be higher than a normal rotation speed during the drying operation.

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