JP2011098033A - Washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing/drying machine capable of improving the dewatering efficiency even if subtle imbalance occurs, and capable of suppressing the power consumption. <P>SOLUTION: In the washing/drying machine, the imbalance control before a high-speed dewatering step is executed (S101) while a drum is rotated at low or medium speed in a final dewatering step just before the drying operation to determine whether imbalance is present or not (S102). When there is no imbalance (S102), subtle imbalance control at the start of the high-speed dewatering step is executed (S103) to determine whether the subtle imbalance is present or not (S104). When the subtle imbalance is not present (S104: Yes), the stabilized high-speed dewatering operation is started (S105). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a washing and drying machine provided with a drying means for supplying hot air to a rotating tub.

  In recent years, in a washing and drying machine equipped with a clothing drying function, in order to save energy and shorten the time required for the drying operation, the efficiency of removing moisture from the clothing in the dehydration operation performed before the drying operation (hereinafter referred to as the dehydration rate). It has been proposed to improve. As is well known, when the weight balance of clothes in the rotating tub is lost in the dehydration operation, that is, an imbalance occurs, the rotating tub does not swing normally in the low rotation speed range, and the rotation speed does not easily rise. Therefore, for example, in the washing and drying machine described in Patent Document 1, it is determined whether or not the above imbalance has occurred in the dehydration operation performed before the drying operation, and it is determined that the unbalance has occurred. In order to improve the dehydration rate, control is performed to correct the unbalance by repeating the dewatering operation from the loosening again.

JP 2007-307236 A

  By the way, during the dehydrating operation, the input power to the driving means may increase even when it is determined that no imbalance (a large imbalance in a relatively low rotation range) has occurred. FIG. 12 is a diagram showing the relationship between the input power to the driving means and the rotation speed of the rotating tub in a state where a slight imbalance has occurred and in a state where it has not occurred. In a state where a slight imbalance has not occurred, the rotational speed (G11) smoothly increases to the target rotational speed before the input power (G12) reaches the maximum input power, as indicated by the solid line graphs G11 and G12. The input power (G12) decreases after reaching the maximum value. On the other hand, in the state where the slight imbalance occurs, as shown by the broken line graphs G21 and G22, even if the input power (G22) reaches the maximum input power, the rotation speed (G21) does not reach the target rotation speed. Instead, the operation is continued for several minutes up to the target rotational speed with the maximum input. Furthermore, after reaching the target rotational speed, the load applied to the driving means for driving the rotating tub increases, so that a slight increase in input power is required as compared with the state (G12) in which a slight imbalance has not occurred. It has become. In addition, such an increase in input power is noticeable when a high-speed dewatering operation is performed in which the rotating tank is rotated at a rotational speed higher by several hundred rpm than a general dehydrating operation in which the rotating tank is rotated at approximately 1000 rpm.

  However, in the configuration as described in Patent Document 1 described above, it is determined whether or not a large unbalance has occurred in the rotating tank, and the dehydration operation is continued when the unbalance is within an allowable range. There is a problem that it is difficult to suppress an increase in input power during the dehydrating operation. In addition, if dehydration is continued with imbalance occurring, the dehydration rate at the end of dehydration decreases due to the completion of the dehydration operation with insufficient high-speed dehydration, which is necessary for the subsequent drying operation. There is also a problem that time is increased and as a result, the total power consumption increases.

  The present invention has been made in view of the above-described circumstances, and the object thereof is washing and drying that can improve the dehydration rate even when a slight imbalance occurs, and thus can reduce power consumption. Is to provide a machine.

  In order to achieve the above-described object, the present invention provides a water tank, a rotating tank provided rotatably in the water tank, a circulation air passage formed including the water tank and the rotating tank, A drying means for supplying warm air generated by the blower means and the heating means to the rotating tank via the water tank, a driving means for rotationally driving the rotating tank, and the driving means An electric power detection means for detecting input power that is input, a rotation speed detection means for detecting the rotation speed of the rotating tank rotated by the driving means, and an unbalance of the rotating tank rotated by the driving means An unbalance detection means for detecting the input power, the input power detected by the power detection means, the rotation speed of the rotating tank detected by the rotation speed detection means, and the unbalance detection means Control for controlling the driving means so that the rotating tank rotates at a predetermined target rotational speed based on the unbalanced amount of the rotating tank to be output, the rotating tank being less than a predetermined maximum input power, an unbalance being equal to or less than a predetermined amount, and And when the input power reaches a predetermined range with respect to the maximum input power in the dehydration operation performed prior to the drying operation by the hot air supplied from the drying means. When the actual rotational speed of the rotating tank is lower than the target rotational speed by a predetermined number of revolutions or more, the actual rotational speed is set as the temporary target rotational speed, and the rotational tank is rotated at the temporary target rotational speed for a predetermined time. And the rotating tank is rotated again at the target rotational speed after the predetermined time has elapsed.

  According to the present invention, the control means controls the unbalance of the rotating tub to be a predetermined amount or less, and the input power detected by the power detecting means and the rotational speed of the rotating tub detected by the rotational speed detecting means. Based on the above, if the rotation speed does not reach the target rotation speed even when input power close to the maximum input power is input, the actual rotation speed of the rotating tank at that time is rotated for a predetermined time as the provisional target rotation speed. To reduce the input power. Therefore, there is a margin in the input power even when a slight unbalance within the allowable range occurs during the high-speed dewatering operation, and the rotation speed of the rotating tank quickly increases to the target rotation speed after the provisional target rotation speed is maintained. . As a result, it becomes possible to rotate the rotating tank at the target rotational speed during the dehydration operation, and it is possible to improve the dehydration rate while shortening the time required for the dehydration operation, thereby reducing the time required for the drying operation. Power consumption can be suppressed.

Flowchart of unbalance control processing according to the first embodiment of the present invention. Longitudinal side view of washer / dryer Configuration diagram schematically showing heat pump Block diagram schematically showing the electrical configuration of the control device Flow chart showing unbalance control process before high speed dewatering Flowchart showing a minute unbalance control process at the start of high-speed dehydration Part 1 Flowchart 2 showing a minute unbalance control process at the start of high-speed dewatering Diagram showing the relationship between input power and rotation speed FIG. 6 equivalent view according to the second embodiment of the present invention. 7 equivalent diagram FIG. 1 equivalent view according to the third embodiment of the present invention. The figure which shows the relationship between the input electric power and the number of revolutions by the prior art

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. Note that, in a plurality of embodiments, substantially the same components are denoted by the same reference numerals, and description thereof is omitted.
(First embodiment)
Hereinafter, a washing / drying machine according to a first embodiment of the present invention, particularly a drum-type washing / drying machine, will be described with reference to FIGS. 1 to 8.

  As shown in FIG. 2, the washing / drying machine 1 includes a water tank 2 disposed inside a casing, and a drum 3 serving as a rotating tank disposed inside the water tank 2. Both the water tank 2 and the drum 3 are cylindrical, and the axial direction thereof is the front-rear direction (left-right direction in FIG. 2), and the openings 4, 5 are provided on the front end face (left side in FIG. 2). Have. Among these, the opening 5 of the drum 3 is for putting in and out the laundry (clothing), and the opening 4 of the water tank 2 surrounds it. Moreover, the opening 4 of the water tank 2 is connected to the opening 6 for taking in and out the laundry formed in the front part of the housing by a bellows 7, and a door 8 is provided in the opening 6 of the housing so that the door 8 can be opened and closed. Yes.

  In the water tank 2, a hot air outlet 9 is formed in the upper part of the front end face part (a part above the opening 4), and a hot air inlet 10 is formed in the upper part of the rear end face part. In addition, a drain port 11 is formed at the bottom of the bottom of the water tank 2, a drain valve 12 is connected to the drain port 11 outside the water tank 2, and a drain hose 13 is connected to the drain valve 12. Thus, a drainage device 14 for discharging the water in the water tank 2 to the outside of the apparatus is configured.

  A motor 15 is attached to the back surface of the water tank 2, and a rotating shaft 15 a of the motor 15 is inserted into the water tank 2, and the center part of the end surface part on the rear side of the drum 3 is attached to the tip of the motor 15. Thereby, the drum 3 is coaxially supported by the water tank 2 so that rotation is possible. The water tank 2 is elastically supported by the housing by a plurality of suspensions 16 (only one is shown in FIG. 2), and the support form is a horizontal axis in which the axial direction of the water tank 2 is the front-rear direction. Moreover, it has a slope that rises forward. Accordingly, the drum 3 supported in the water tank 2 as described above has the same form.

  A motor 15 is attached to the back surface of the water tank 2, and a rotating shaft 15 a thereof protrudes into the water tank 2. A central portion of the rear end surface portion of the drum 3 is attached to the front end portion of the rotating shaft 15a. Thereby, the drum 3 is coaxially supported by the water tank 2 so that rotation is possible. That is, the washing / drying machine 1 has a configuration in which the drum 3 is directly driven to rotate by the motor 15, and a direct drive system using the motor 15 is adopted. In this case, the motor 15 is an outer rotor type and a thin brushless DC motor.

A base plate 17 is disposed below the water tank 2 (on the bottom surface of the housing), and a heat exchange duct 18 is disposed on the base plate 17. This heat exchange duct 18 has an air inlet 19 at the upper part of the front end, and the hot air outlet 9 of the water tank 2 is connected to the air inlet 19 via a return air duct 20 and a connection hose 21. . The return air duct 20 is piped so as to bypass the left side of the opening 4 of the water tank 2.
On the other hand, a casing 23 of the circulation fan 22 is connected to the rear end portion of the heat exchange duct 18, and an outlet 24 of the casing 23 is connected to the temperature of the water tank 2 via a connection hose 25 and an air supply duct 26. It is connected to the wind inlet 10. The air supply duct 26 is piped so as to bypass the left side of the motor 15.

As a result, the return air duct 20, the connection hose 21, the heat exchange duct 18, the casing 23, the connection hose 25, and the air supply duct 26 connect the hot air outlet 9 and the hot air inlet 10 of the water tank 2 to circulate the wind. A path 27 is provided. In this case, the circulation fan 22 is a centrifugal fan, has a centrifugal impeller 28 inside the casing 23, and has a circulation fan motor 29 for rotating the centrifugal impeller 28 outside the casing 23. Yes.
In the circulation air passage 27, the evaporator 30 is arranged at the front part and the condenser 31 is arranged at the rear part inside the heat exchange duct 18. The evaporator 30 and the condenser 31 are not shown in detail, but they are tube-shaped with fins in which a large number of heat transfer fins are arranged on the refrigerant distribution pipe at a fine pitch, and are excellent in heat exchange. The air flowing through the heat exchange duct 18 as described later passes between the heat transfer fins.

  As shown in FIG. 3, the evaporator 30 and the condenser 31 include a compressor 32 that compresses the refrigerant supplied to the condenser 31, and a throttle valve 33 (a decompression unit that decompresses the refrigerant discharged from the condenser 31). In particular, the heat pump 34 is configured together with an electronic throttle valve). In the heat pump 34, the compressor 32, the condenser 31, the throttle valve 33, and the evaporator 30 are connected in this order by a connection pipe 35 to constitute a refrigeration cycle. The refrigerant is circulated by operating the compressor 32.

  More specifically, the refrigerant sealed in the heat pump 34 is compressed by the compressor 32 to become a high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant flows into the condenser 31 and is condensed to dissipate heat. As a result, the air in the circulation air passage 27 (heat exchange duct 18) is heated, and conversely, the temperature of the refrigerant is lowered and liquefied. The liquefied refrigerant then passes through the throttle valve 33 and is depressurized, and then flows into the evaporator 30 and vaporizes. Thereby, the evaporator 30 cools and dehumidifies the air in the circulation air path 27 (heat exchange duct 18). The refrigerant that has passed through the evaporator 30 returns to the compressor 32.

  When the circulation fan motor 29 is operated, the air in the water tank 2 is connected to the return air duct 20 and the connection of the circulation air passage 27 from the hot air outlet 9 as shown by arrows in FIG. It flows into the heat exchange duct 18 through the hose 21. The air that has flowed into the heat exchange duct 18 is cooled by the evaporator 30 and dehumidified, and then heated by the condenser 31 to warm air. Then, the hot air is supplied from the hot air inlet 10 into the water tank 2 through the connection hose 25 and the air supply duct 26. Thus, the evaporator 30 functions as a dehumidifier, and the condenser 31 functions as a heater. The evaporator 30 and the condenser 31, the circulation air passage 27 and the circulation fan 22, thereby the inside of the water tank 2. A drying device 36 is configured to supply hot air.

  On the other hand, the drum 3 has a warm air inlet 37 formed in the rear end surface portion 3a, and the hot air inlet 37 is arranged in an annular arrangement concentric with the center of the rear end surface portion of the drum 3. And each one of them faces the hot air inlet 10 of the water tank 2 by the rotation of the drum 3. Accordingly, the hot air supplied to the inside of the water tank 2 as described above is supplied to the inside of the drum 3 from each of the hot air introduction ports 37.

A large number of holes 38 for dehydration and ventilation are provided in almost the entire area of the drum portion 3 b of the drum 3. Further, a plurality of (for example, about three) baffles 39 for stirring the laundry are provided on the inner peripheral surface of the drum portion 3b of the drum 3 with substantially equal intervals. In addition, a liquid-filled rotary balancer 40 is provided on the entire inner periphery of the front end surface portion 3 c of the drum 3.
A power supply system control unit 41 and a display system control unit 42 necessary for controlling the washing and drying machine are provided in the upper part of the housing. In addition, a water supply valve 43 for supplying water into the water tank 2, a water supply case 44, and a water supply hose 45 are disposed in the upper part of the housing, and a water supply device 46 is configured.

  FIG. 4 shows a control device 47 (corresponding to control means). The control device 47 includes a power supply control unit 41 and a display control unit 42. The control device 47 is mainly composed of a microcomputer including a CPU, a ROM, a RAM, and the like (not shown). Takes the function of controlling. Therefore, the control device 47 includes a current detection sensor for detecting various operation signals from the operation input unit 48 including various operation switches (not shown) of the operation panel and a current value supplied to the motor 15. A detection signal from 49, a rotation detection signal from the rotation sensor 50 that detects the number of rotations of the drum 3, a detection signal from the acceleration sensor 51 for detecting the unbalance amount of the drum 3, and the like are input.

The control device 47 drives the water supply valve 43, the motor 15, the drain valve 12, the compressor 32, the throttle valve 33, the circulation fan motor 29, and the like based on the above various input signals and a previously stored control program. Control is performed via 52.
The drive circuit 52 has an inverter circuit (not shown) for driving the motor 15, and the current detection sensor 49 is provided along with the inverter circuit. The current detection sensor 49 is constituted by a current detection element such as a shunt resistor, for example, detects the current value of the drive voltage supplied to the inverter circuit, and outputs it to the control device 47 as a detection signal. And the control apparatus 47 calculates the electric power consumed in order to drive the motor 15 based on this detection signal. That is, the current detection sensor 49 and the control device 47 constitute a power detection means referred to in the present invention. In the following description, this consumed power is referred to as input power.

  The rotation sensor 50 is configured by a magnetic detection element such as a Hall IC or an optical detection element such as a photo interrupter, and a signal corresponding to the rotation position of the drum 3 is rotated once, for example, by the drum 3. Each time it is output, it is output to the control device 47 as a detection signal. Based on this detection signal, the control device 47 calculates the rotational speed of the drum 3 by measuring, for example, the time interval at which the detection signal is output. That is, the rotation sensor 50 and the control device 47 constitute a rotation speed detection means referred to in the present invention. Although details will be described later, the rotation sensor 50 and the current detection sensor 49 also function as unbalance detection means for detecting a minute unbalance during high-speed dehydration.

  In the present embodiment, the acceleration sensor 51 is disposed on the outer peripheral portion of the water tank 2 so as to be separated in the front-rear direction in the rotation center axis direction (see FIG. 2), and detects the acceleration of the drum 3 in the three-dimensional direction. The acceleration sensor 51 includes a support portion provided with a weight, and a piezoresistive element that detects a strain at the time of bending deformation of the support portion by a change in resistance value, and accelerations in the detection axes X, Y, and Z directions are detected. The magnitude of acceleration in each detection axis direction (three-dimensional direction) is detected based on a change in resistance value of the piezoresistive element due to the addition to the weight. Then, the acceleration sensor 51 outputs the magnitude of acceleration in each detection axis direction to the control device 47 as a detection signal, and the control device 47 specifically detects a change in force during rotation based on the detection signal. Based on the size, the imbalance of the drum 3 is detected. That is, the acceleration sensor 51 and the control device 47 constitute an unbalance detection means in the present invention. Instead of using the acceleration sensor 51, an unbalance may be detected based on uneven rotation of the drum 3.

Next, the operation of this embodiment will be described.
When the standard operation course including the drying operation is started, the control device 47 first starts the washing operation (washing and rinsing). In this washing operation, the operation of supplying water into the water tub 2 is performed by the water supply valve 43, and then the motor 15 is operated, whereby the drum 3 is alternately rotated in both forward and reverse directions at a low rotational speed. When the washing operation ends, the control device 47 shifts to the dehydration operation. In this dehydration operation, after the water in the water tank 2 is discharged, the drum 3 is rotated in one direction at about 1000 rpm. Thereby, the laundry in the drum 3 is dehydrated by centrifugal force.

  In the final dehydration performed immediately before the drying operation, the washing / drying machine 1 performs high-speed dehydration in which the drum 3 is rotated at a rotation speed (for example, 1650 rpm) higher by several hundred rpm than usual. Hereinafter, the flow of processing during high-speed dewatering will be described. In the following description, the expression “no imbalance” means that there is no imbalance, or even if an imbalance has occurred, a preset permission is set according to the weight of the laundry. It shall mean a state that is below capacity. Further, the expression “there is unbalance” means a state in which the unbalance has occurred beyond the allowable amount. Each control described below is software processing mainly executed by the CPU of the control device 47.

  As shown in FIG. 1, the control device 47 performs an unbalance control process before starting high-speed dewatering (S101). This unbalance control is a control that adjusts the weight balance of the laundry while rotating the drum 3 at a relatively low speed / medium speed of about 100 to 500 rpm, similarly to the conventional unbalance control. is there.

  FIG. 5 is a diagram showing details of the unbalance control process before high-speed dewatering in step S101. In this unbalance control, the control device 47 first sets initial conditions (S201). Here, based on the type of laundry selected by the user at the start of the washing operation, the driving course, the weight of the loaded laundry, and the like, two rotational speeds for detecting imbalance (hereinafter referred to as the first rotation number). Determination rotational speed and second determination rotational speed) are set. In the present embodiment, the first determination rotation speed is set to about 100 to 200 rpm, and the second determination rotation speed is set to about 300 to 500 rpm.

  When the initial setting is made, the control device 47 rotationally drives the drum 3 and first increases the rotational speed to the first determination rotational speed (S202). Then, it is determined whether or not the actual current value detected by the current detection sensor 49 in a state where the drum 3 is rotating at the first determination rotation speed is less than a preset upper limit current value (S203). . Here, the upper limit current value is the upper limit of the current value required to rotationally drive the motor 15 when the drum 3 is rotated at the first determination rotational speed in the absence of imbalance, and the type of laundry Depending on the weight and the like, it is stored in advance as a table in a ROM or the like.

  When the actual current value is equal to or greater than the upper limit current value (S203: NO), the control device 47 performs the loosening operation (S204). The loosening operation is control in which the drum 3 is repeatedly rotated and stopped for a certain period of time including normal rotation and reverse rotation at a low rotation speed of about 100 rpm in order to eliminate imbalance, that is, unevenness of the laundry. In this way, when the drum 3 is rotated at the relatively low first determination rotational speed, the actual current value exceeding the upper limit current value is considered to be a state of large imbalance. Therefore, the control device 47 performs the loosening operation and corrects the unbalance. Then, it is determined whether the number of unwinding operations is a predetermined number of times, for example, 2 or more (S205). If the number of unwinding operations is less than the predetermined number (S205: NO), the process proceeds to step S202, and again. The rotational speed is increased to the first determination rotational speed.

  On the other hand, when it is determined in step S203 that the actual current value is less than the upper limit current value (S203: YES), the control device 47 determines that there is no imbalance and sets the rotation speed to the second determination rotation speed. Increase (S206). Then, it is determined whether or not the actual acceleration detected by the acceleration sensor 51 is less than a preset upper limit acceleration while the drum 3 is rotating at the second determination rotation speed (S207). Here, the upper limit acceleration is an upper limit of acceleration applied to the drum 3 when the drum 3 is rotated at the second determination rotation speed in a state where there is no unbalance, and is determined in advance according to the type and weight of the laundry. It is stored as a table in ROM or the like.

  When the actual acceleration is greater than or equal to the upper limit acceleration (S207: NO), the control device 47 proceeds to step S204, performs the loosening operation, and corrects the laundry bias. On the other hand, when the actual acceleration is less than the upper limit acceleration (S207: YES), it is determined that there is no unbalance, and after increasing the rotation speed to the initial drum rotation speed (S208), it is determined that there is no unbalance. (S209), return. The initial drum rotation speed is the rotation speed of the drum 3 (about 900 rpm) in a normal dehydration operation.

  Moreover, after performing the unwinding operation in step S204, when the number of unwinding operations is a predetermined number of times, for example, 2 times or more (S205: YES), it is determined that there is an imbalance (S210), and the process returns.

  Subsequently, as shown in FIG. 1, the control device 47 determines whether or not it is determined that there is no unbalance in the above-described unbalance control process (S102), and when there is an unbalance (S102: NO). Once the rotation of the drum 3 is stopped, the process proceeds to step S101 and the unbalance control is performed again. At this time, a counting means for counting the number of times determined to be unbalanced is provided, and if the count value exceeds a certain number of times, it is difficult to correct the unbalance. For example, a display panel, a buzzer, etc. It is preferable to provide a notification means for prompting the user to confirm.

  As described above, the control device 47 first rotates the drum 3 at a low speed (about 100 to 200 rpm) based on the actual current value detected by the current detection sensor 49 and the actual acceleration detected by the acceleration sensor 51. It is determined whether there is a large unbalance. If there is no large unbalance, it is determined again whether there is an unbalance at medium speed (about 300 to 500 rpm). If it is determined that there is no unbalance at any number of revolutions or that the unbalance is equal to or less than a predetermined amount (S102: YES), the revolution number of the drum 3 is set to the revolution number during normal dehydration operation ( Then, the minute unbalance control process at the start of high-speed dewatering is executed (S103).

  The laundry dryer 1 of the present embodiment performs high-speed dewatering in order to improve the dewatering rate of the laundry. In this high-speed dewatering, the drum 3 is rotated at a speed of several hundred rpm faster than the normal dewatering operation. Therefore, even if the unbalance is determined to be within the allowable range in the above-described steps S203 and S206, the motor 15 As a result, there is a possibility that the drum 3 cannot be rotated at the target rotational speed. For this reason, the control device 47 performs a minute unbalance control process at the start of high-speed dewatering.

  6 and 7 are diagrams showing details of the fine unbalance control at the start of the high-speed dehydration in step S103. In this minute unbalance control, the control device 47 first sets initial conditions (S301). As initial conditions, the target rotational speed (1650 rpm) of the high-speed dehydration operation, the upper limit input power (720 W) that is the maximum value of the input power at the target rotational speed, the determination interval rotational speed (50 rpm), and the unit increase speed (5 rpm / s) ), The rotation speed holding time (60 seconds) is set. Further, a determination start rotational speed (1200 rpm) for starting detection of minute imbalance and a reference rotational speed (1650 as a reference for determining whether the actual rotational speed is within a predetermined range with respect to the target rotational speed) −50 = 1600 rpm), a first reference input power (720 W−20 W = 700 W) serving as a reference for determining whether or not the actual input power has reached a predetermined range with respect to the upper limit input power, and the first The second reference input power (720W-50W = 670W) set to a value lower than the reference power is set.

  That is, in the present embodiment, the “time when the input power reaches a predetermined range with respect to the maximum input power” in the present invention means that the actual input power has reached a range of −20 W from the upper limit input power. This corresponds to the time point, that is, the time point when the actual input power becomes 700 W or more. Further, “when it is lower than the target rotational speed by a predetermined rotational speed or higher” corresponds to the case where the actual rotational speed is lower than the target rotational speed by 50 rpm or more. These set values are stored in advance in a ROM, for example.

  When the setting of the initial conditions is completed, the control device 47 increases the rotational speed of the drum 3 rotating at the initial rotational speed (900 rpm) by the unit ascending speed (5 rpm / s) (S302). Subsequently, it is determined whether or not the actual rotational speed detected by the rotational sensor 50 is equal to or higher than the target rotational speed (1200 rpm) (S303). Immediately after the start of high-speed dewatering, the actual rotational speed is less than the target rotational speed (S303: NO), so it is determined whether or not the actual rotational speed has increased by the determination interval rotational speed (50 rpm) (S304). When the number does not increase by the determination interval rotation number (S304: NO), the process proceeds to step S302 to increase the rotation number.

  When the rotational speed increases at the determination interval rotational speed (S304: YES), the controller 47 determines whether the actual rotational speed is less than the detection start rotational speed (1200 rpm) (S305), and the detection start rotational speed. When it is less than the number (S305: YES), the process proceeds to step S302. That is, the control device 47 is in a state where the rotation speed exceeds the detection start rotation speed and increases by the determination interval rotation speed, that is, 10 seconds when the actual rotation speed increases by 50 rpm (= determination interval rotation speed ÷ unit increase). Every minute (speed), a slight imbalance is judged.

  When the control device 47 determines that the rotation speed of the drum 3 is equal to or higher than the detection start rotation speed (S305: NO), the control device 47 calculates the current value detected based on the current value detected by the current detection sensor 49 as shown in FIG. It is determined whether the actual input power at the rotational speed is equal to or higher than the first reference power (700 W) (S306). If the actual input power is less than the first reference power (S306: NO), it is determined that there is room to increase the rotation speed, and the process proceeds to step S302. On the other hand, when the actual input power is equal to or higher than the first reference power (S306: YES), it is determined whether the actual rotation speed is equal to or higher than the reference rotation speed (1600 rpm) (S307).

  When the actual rotational speed is equal to or higher than the reference rotational speed (S307: YES), the control device 47 proceeds to step S302. In this case, since the rotation speed of the drum 3 increases smoothly as the input power increases, in order to increase the rotation speed, in other words, to rotate the drum 3 at the target rotation speed, step S302 is performed. Transition.

  On the other hand, when the actual rotational speed is less than the reference rotational speed (S307: NO), the actual rotational speed is set as the provisional target rotational speed and a timer is started (S308). This timer is for measuring whether or not the above-described rotation speed holding time (60 seconds) has elapsed since step S308 was executed. Then, it is determined whether or not the rotation speed holding time has passed (S309). If the rotation speed holding time has not passed (S309: NO), the system waits until the rotation time has passed. At this time, the control device 47 performs control so that the rotational speed of the drum 3 is maintained at the temporary target rotational speed, that is, rotates at a constant rotational speed until the rotational speed holding time elapses.

  When the rotation speed is less than the reference rotation speed despite the input power exceeding the first reference power being supplied in this way (S306: YES and S307: NO), the control device 47 has a slight imbalance. Judge that it has occurred. In other words, since there is a slight imbalance that is determined to be within the allowable range in the detection of imbalance by the acceleration sensor 51, the rotation speed does not increase even when the upper limit input power is supplied. Since the rotational speed has not reached the target rotational speed, it is determined that the upper limit input power is continuously supplied.

  Therefore, the controller 47 includes the motor 15 by rotating the drum 3 at a temporary target rotational speed lower than the target rotational speed (1650 rpm) and at a constant rotational speed for 60 seconds without increasing or decreasing the rotational speed. The load applied to the means is reduced, and the input power is reduced beyond the peak input at the temporary target rotational speed.

  When the predetermined time has elapsed (S309: YES), the controller 47 determines whether or not the actual input power is equal to or higher than the second reference power (670 W) (S310). As described above, the second reference power is set to a value lower than the first reference power. For this reason, it is possible to reliably determine whether or not the input power determined to have exceeded the first reference power in step S306 has decreased during the constant speed rotation for the rotation speed holding time in step S309. Become. In other words, the second reference power is set to a value larger than the expected value of the input power supplied after rotating for the rotation speed holding time. Note that the second reference power and the rotation speed holding time may be changeable according to the weight of the laundry, the washing course selected by the user, and the like.

  When the actual input power is less than the second reference power (S310: NO), the control device 47 proceeds to step S302 (see FIG. 6). Then, the number of revolutions is increased (S302), and minute unbalance determination such as determining whether the actual number of revolutions is equal to or greater than the target number of revolutions (S303) is repeated, and the target number of revolutions in a state in which no minute unbalance occurs. When this is the case (S302: YES), it is determined that there is no minute imbalance (S312), and the process returns.

  On the other hand, when the actual input power is equal to or higher than the second reference power (S310: YES), it is determined that a slight imbalance has occurred, and whether or not the number of detections of the minute imbalance is the second time. Determination is made (S311). If the number of detections of the minute unbalance is not the second time (S311: NO), the process proceeds to step S306 and the detection of the minute unbalance (S307 to S310) is repeated again. On the other hand, when the number of detections of the minute unbalance is the second time (S311: NO), it is determined that there is a minute unbalance (S313), and the process returns.

As described above, the control device 47 determines whether or not a minute imbalance has occurred in the minute imbalance control process at the start of the high-speed dewatering operation based on the detection signals from the current detection sensor 49 and the rotation sensor 50. is doing.
When the minute unbalance control process is completed, as shown in FIG. 1, the control device 47 determines whether or not there is a minute unbalance (S104), and determines that a minute unbalance has not occurred (S104: YES), a stable operation for rotating the drum 3 at the target rotational speed is performed (S105).

  On the other hand, when it is determined that a slight imbalance has occurred (S104: NO), the process proceeds to step S101, the imbalance is corrected, and the processes of steps S102 to S104 are performed again. That is, if the rotational speed could not be increased to the target rotational speed due to the occurrence of a slight imbalance in step S104, the rotation of the drum 3 is once stopped and then the normal unbalance control and the control from step S101 are performed again. Control is performed so that high-speed dewatering can be performed by repeating the micro-unbalance control process. At this time, similarly to step S102, when the number of times that it has been determined that there is a slight imbalance exceeds a certain number of times, the user may be notified that it is difficult to correct the imbalance.

  As described above, the control device 47 performs the fine unbalance control so that the high-speed dewatering can be performed in the final dewatering operation before the drying operation. FIG. 8 shows the relationship between the rotational speed of the drum 3 and the input power in the final dehydration described above. For simplification of explanation, FIG. 8 does not show changes in the rotational speed and input power when performing unbalance control before high-speed dewatering in steps S101 and S102.

  When final dewatering is started (time T0), the rotational speed (G31) and input power (G32) of the drum 3 gradually increase. When it is determined that the rotation speed does not increase even when the maximum input power, that is, the upper limit input power is supplied (time T1), the control device 47 sets the drum 3 to 60 at the rotation speed (temporary target rotation speed) at the time T1. Rotate for seconds. Since the drum 3 is rotating at a constant rotational speed, the input power is reduced beyond the peak input (after time T2). Then, after the input power is reduced by a certain value or more, the input power is increased to rotate the drum 3 again at the target rotational speed (after time T3), and when the drum 3 reaches the target rotational speed (time T4), the target is reached. Control to continue the rotation at the rotation speed. After reaching the target speed, the input power decreases beyond the second peak.

  Thus, after it is determined that a slight imbalance has occurred, the drum 3 is rotated at a constant rotational speed for a certain period of time, whereby the rotational speed of the drum 3 gradually increases while the upper limit input power is supplied ( The drum 3 reaches the target rotational speed more rapidly than the graphs G21 and G22). In addition, after reaching the target rotational speed (after time T4), the input power (G32) when the minute unbalance control is performed is lower than the input power (G22) when the minute unbalance control is not performed. It is approaching an ideal state (G11) with no minute imbalance. That is, an increase in power consumption during high-speed dewatering operation is suppressed.

  Now, the control device 47 performs the drying operation when the high speed dewatering is completed. In this drying operation, the compressor 3 of the circulation fan 22 and the heat pump 34 is started while rotating the drum 3 in both forward and reverse directions at a low speed by the motor 15. Thereafter, the air in the water tank 2 is circulated through the circulation air passage 27, and the refrigerant sealed in the heat pump 34 is circulated through the condenser 31, the throttle valve 33, and the evaporator 30 in order. . The circulated air is dehumidified by the evaporator 30 and heated by the condenser 31. Thereby, warm air is supplied to the inside of the water tank 2 and the laundry is dried.

As explained above, according to the washing / drying machine 1 of this embodiment, there exist the following effects.
The controller 47 allows the detection by the acceleration sensor 51 based on the actual input power detected by the current detection sensor 49 and the actual rotation speed of the drum 3 detected by the rotation sensor 50 at the start of the high-speed dehydration in the final dehydration. Laundry bias that is determined to be within the range, that is, a slight imbalance is detected. At this time, if the rotational speed does not reach the target rotational speed even when input power close to the upper limit input power is input, in other words, in a state where a slight imbalance has occurred, the actual rotational speed of the drum 3 at that time is temporarily set. The target rotation speed is rotated for a predetermined time. As a result, the input power supplied to the driving means such as the motor 15 is reduced, and there is a margin in the input power even in a state where a slight imbalance has occurred. As a result, the number of rotations of the drum 3 can be rapidly increased to the target number of rotations, and high-speed dewatering that rotates the drum 3 at a higher speed than in a normal dewatering operation is possible. Therefore, the time required for the dehydration operation can be shortened and the dehydration rate can be improved.

Further, since the rotation speed of the drum 3 smoothly increases to the target rotation speed, the upper limit input power is not continuously supplied until the target rotation speed is reached as in the prior art (see G21 and 22 in FIG. 8). An increase in power consumption in the dehydration operation can be suppressed. Furthermore, since the dehydration rate is improved, it is possible to reduce the time required for the drying operation, and thus it is possible to suppress the power consumption of the drying operation, and thus to reduce the total power consumption.
The controller 47 controls the drum 3 to rotate at a low speed before starting high-speed dewatering, and loosens and corrects a relatively large unbalance based on detection signals from the current detection sensor 49 and the acceleration sensor 51. Therefore, it is possible to smoothly shift to high speed dewatering and perform stable high speed dewatering.

If it is determined that there is a slight imbalance at the start of high-speed dewatering, the drum 3 is controlled to increase to the target speed without stopping, so that the drum 3, that is, the motor 15 is stopped and An increase in power at the time of restart can be suppressed, and energy saving can be realized.
Since the occurrence of a slight imbalance at the start of high-speed dehydration is determined by the current detection sensor 49 and the rotation sensor 50, there is no need to newly provide a sensor dedicated to the minute imbalance detection, and the increase in cost can be suppressed. it can.

If the minute imbalance cannot be corrected at the start of high-speed dewatering, the drum 3 is rotated at a low speed to correct the imbalance, so that large input power is not continuously supplied, and an increase in the load on the environment is suppressed. be able to.
Further, the same effect can be obtained by setting the time for rotating at the temporary rotational speed to a predetermined time (for example, 2 minutes).

(Second Embodiment)
Next, 2nd Embodiment of this invention is described based on FIG. 9 and FIG. The washing / drying machine according to the second embodiment is different from the first embodiment in that the upper limit input power is temporarily raised when a slight imbalance occurs. In addition, since the structure of the washing / drying machine of the second embodiment and the rough flow of the unbalance control are the same as those of the first embodiment, FIG. 1 to FIG. 5 are also referred to and substantially the same as the first embodiment. The same components and substantially the same steps are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the washing and drying machine of the second embodiment, the control device 47 (see FIG. 4), in the dewatering operation before the drying operation, performs unbalance control (S101) before high speed dewatering and starts high speed dewatering as in the first embodiment. A minute unbalance control at the time (S103) is performed (see FIG. 1). In the unbalance control (S101) before high speed dewatering, the same processing as that of the first embodiment is performed (see FIG. 5). On the other hand, in the minute unbalance control (S103) at the start of high-speed dewatering, the method for raising the rotational speed of the drum 3 to the target rotational speed is different from that of the first embodiment.

  As shown in FIG. 9, the control device 47 sets initial conditions in the minute unbalance control at the start of high-speed dewatering (S401). In this case, as initial conditions, as in the first embodiment, the target rotational speed (1650 rpm), the upper limit input power (720 W), the determination interval rotational speed (50 rpm), and the unit increase speed (5 rpm / s) The determination start rotation speed (1200 rpm) and the reference rotation speed (1650-50 = 1600 rpm) are set. In the present embodiment, the provisional upper limit input power (870 W = upper limit input power + 150 W), which is an increase value when the value of the upper limit input power is temporarily increased, is the time for driving the drum 3 with the provisional upper limit input power. A certain input power rise time (180 seconds) is also set. For this reason, in the present embodiment, “temporary” in the case of “temporarily increasing the value of the maximum input power” in the present invention corresponds to 180 seconds.

  When the setting of the initial conditions is completed, the control device 47 increases the rotational speed of the drum 3 rotating at the initial rotational speed (900 rpm) by the unit ascending speed (5 rpm / s) (S402). Subsequently, it is determined whether or not the actual rotation speed detected by the rotation sensor 50 is equal to or higher than the target rotation speed (1200 rpm) (S403). Immediately after the start of high-speed dewatering, the actual rotational speed is less than the target rotational speed (S403: NO), so it is determined whether the actual rotational speed has increased by the determination interval rotational speed (50 rpm) (S404). When the number does not increase by the determination interval rotation number (S404: NO), the process proceeds to step S402 to increase the rotation number.

  When the rotational speed increases at the determination interval rotational speed (S404: YES), the controller 47 determines whether the actual rotational speed is less than the detection start rotational speed (1200 rpm) (S405), and the detection start rotational speed. When it is less than the number (S405: YES), the process proceeds to step S402. That is, the control device 47 is in a state where the rotation speed exceeds the detection start rotation speed and increases by the determination interval rotation speed, that is, 10 seconds when the actual rotation speed increases by 50 rpm (= determination interval rotation speed ÷ unit increase). Every minute (speed), a slight imbalance is judged.

  If the control device 47 determines that the rotation speed of the drum 3 is equal to or higher than the detection start rotation speed (S405: NO), the control device 47 is calculated based on the current value detected by the current detection sensor 49 as shown in FIG. It is determined whether the actual input power at the rotation speed is equal to or higher than the first reference power (700 W) (S406). If the actual input power is less than the first reference power (S406: NO), it is determined that there is room to increase the rotational speed, and the process proceeds to step S402. On the other hand, when the actual input power is equal to or higher than the first reference power (S406: YES), it is determined whether the actual rotation speed is equal to or higher than the reference rotation speed (1600 rpm) (S407).

  When the actual rotational speed is equal to or higher than the reference rotational speed (S407: YES), the control device 47 proceeds to step S402. In this case, since the rotational speed of the drum 3 increases smoothly with the increase in input power, in order to increase the rotational speed, in other words, to rotate the drum 3 at the target rotational speed, step S402 is performed. Transition.

  On the other hand, when the actual rotational speed is less than the reference rotational speed (S407: NO), the upper limit of the input power supplied by increasing the upper limit of the upper limit input power is set to the provisional upper limit input power (850W). (S408), a timer is started (S409). When the rotational speed is less than the reference rotational speed despite the input power exceeding the first reference power being supplied (S406: YES and S407: NO), the control device 47 generates a slight imbalance. Judge that Therefore, in order to rotate the drum 3 at the target rotation speed (1650 rpm), the control device 47 sets the upper limit of the input power to the provisional upper limit input power in step S408 to increase the rotation speed of the drum 3.

  After starting the timer, the control device 47 determines whether the actual rotation speed of the drum 3 is equal to or higher than the target rotation speed (S412). If the actual rotational speed is not equal to or higher than the target rotational speed (S412: NO), whether or not the upper limit input increase time has elapsed, that is, whether or not the operation time at the temporary upper limit input power has continued for 180 seconds. If it is determined (S413) and has elapsed (S413: YES), the rotational speed of the drum 3 is increasing smoothly, that is, a slight imbalance has not occurred, and the process proceeds to step S402 (FIG. 9). And increase the rotation speed.

  If the upper limit input increase time has not elapsed (S413: NO), it is determined whether or not the actual input power is greater than or equal to the provisional upper limit input power (870W) (S414). (S414: NO), the process proceeds to step S409 and continues to increase the rotational speed. On the other hand, when the actual input power is equal to or higher than the upper limit input power (S414: YES), it is determined whether the actual rotation speed is equal to or higher than the reference rotation speed (1600 rpm) (S415).

  When the actual rotational speed is less than the reference rotational speed (S415: YES), the control device 47 proceeds to step S409 and continues to increase the rotational speed. Then, after the rotation speed increase (S409 to S414) is repeated in a state where there is no abnormality in the rotation speed and the actual input power, when it is determined in step S411 that the actual rotation speed is equal to or higher than the target rotation speed (S411: YES), the process proceeds to step S416 (see FIG. 9), and it is determined that there is no minute imbalance, and the process returns.

On the other hand, when the actual rotational speed is less than the reference rotational speed (S415: NO), the process proceeds to step S417 (see FIG. 9), and returns with a slight imbalance.
As described above, the control device 47 determines whether or not a minute imbalance has occurred in the minute imbalance control process at the start of the high-speed dewatering operation based on the detection signals from the current detection sensor 49 and the rotation sensor 50. is doing. When the minute unbalance control process is completed, the process proceeds to step S104 (see FIG. 1) to determine whether or not there is a minute unbalance. When it is determined that the minute unbalance has not occurred (S104: YES), A stable operation for rotating the drum 3 at the target rotational speed is performed (S105).

On the other hand, when it is determined that a slight imbalance has occurred (S104: NO), the process proceeds to step S101, the imbalance is corrected, and the processes of steps S102 to S104 are performed again. That is, if the rotational speed could not be increased to the target rotational speed due to the occurrence of a slight imbalance in step S104, the rotation of the drum 3 is once stopped and then the normal unbalance control and the control from step S101 are performed again. Control is performed so that high-speed dewatering can be performed by repeating the micro-unbalance control process. At this time, if the number of times that it is determined that there is a slight imbalance becomes a certain number or more, the user may be notified that it is difficult to correct the slight imbalance.
As described above, the control device 47 performs the fine unbalance control so that the high-speed dewatering can be performed in the final dewatering operation before the drying operation.

  As explained above, according to the washing / drying machine 1 of this embodiment, there exist the following effects.

  The controller 47 allows the detection by the acceleration sensor 51 based on the actual input power detected by the current detection sensor 49 and the actual rotation speed of the drum 3 detected by the rotation sensor 50 at the start of the high-speed dehydration in the final dehydration. Laundry bias that is determined to be within the range, that is, a slight imbalance is detected. At this time, if the rotational speed does not reach the target rotational speed even when input power close to the upper limit input power is input, in other words, in a state where a slight imbalance has occurred, the upper limit of the input power for driving the drum 3 Is controlled to increase the rotational speed of the drum 3 to the target rotational speed quickly. As a result, the drum 3 can be rotated at the target rotational speed, and high-speed dewatering in which the drum 3 is rotated at a higher speed than in a normal dewatering operation is possible. Therefore, the dehydration rate can be improved while shortening the time required for the dehydration operation.

  Since the drum 3 can be rotated at the target rotation speed, it is possible to prevent the laundry from being insufficiently dehydrated by performing the dehydration operation while the rotation speed of the drum 3 is insufficient. Thereby, it can transfer to drying operation in the state where laundry was fully dehydrated, and it can control an increase in power consumption in drying operation.

Since the rotation speed of the drum 3 smoothly increases to the target rotation speed, the upper limit input power is not continuously supplied until the target rotation speed is reached as in the prior art (see G21 and 22 in FIG. 12), and the dehydration operation is performed. An increase in power consumption can be suppressed. Further, since the dehydration rate is improved, it is possible to shorten the time required for the drying operation, and it is possible to suppress an increase in the power consumption of the drying operation, and thus to reduce the total power consumption.
The controller 47 controls the drum 3 to rotate at a low speed before starting high-speed dewatering, and loosens and corrects a relatively large unbalance based on detection signals from the current detection sensor 49 and the acceleration sensor 51. Therefore, it is possible to smoothly shift to high speed dewatering and perform stable high speed dewatering.

If it is determined that there is a slight imbalance at the start of high-speed dewatering, the drum 3 is controlled to increase to the target speed without stopping, so that the drum 3, that is, the motor 15 is stopped and An increase in power at the time of restart can be suppressed, and energy saving can be realized.
Since the occurrence of minute imbalance at the start of high-speed dehydration is determined by the current detection sensor 49 and the rotation sensor 50, it is not necessary to newly provide a sensor dedicated to minute imbalance detection, and a significant increase in cost is suppressed. be able to.

  If the minute imbalance cannot be corrected at the start of high-speed dewatering, the drum 3 is rotated at a low speed to correct the imbalance, so that large input power is not continuously supplied, and an increase in the load on the environment is suppressed. be able to.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The laundry dryer according to the third embodiment is different from the first embodiment in that the maximum input power at the start of high-speed dewatering is set to a value obtained by adding the power required for so-called preheat heating. In addition, since the structure of the washing / drying machine of 3rd Embodiment is the same as that of 1st Embodiment, while it demonstrates also referring FIG. 1, it is substantially the same structure as 1st Embodiment, and substantially the same. These steps are denoted by the same reference numerals, and detailed description thereof is omitted.

  The washing / drying machine of the third embodiment is configured to perform so-called preheating heating that drives the drying device 36 including the heat pump 34 and supplies warm air to the drum 3 in the final dehydration performed immediately before the drying operation. ing. This preheating heating improves the dehydration rate of the laundry in the dehydration operation, and it is possible to shorten the time required for the dehydration operation and the subsequent drying operation and to reduce power consumption.

  In the final dehydration, the controller 47 first performs unbalance control before high-speed dewatering (S101) and determines whether there is no unbalance (S102), as in the first embodiment shown in FIG. If there is no unbalance (S102), fine unbalance control at the start of high-speed dewatering is performed (S501). Then, it is determined whether or not there is a minute imbalance (S104). If there is a minute imbalance (S104: YES), stable operation of high-speed dewatering is started (S105), and after high-speed operation is started, That is, the operation of the refrigeration cycle (drying device 36) is started during high-speed dewatering (S502).

As described above, in the present embodiment, the heat pump 34 is driven after the fine unbalance control at the start of the high-speed dehydration, so that the electric power to be supplied to the heat pump 34 during the fine unbalance control is obtained. It will be in a surplus state.
Therefore, in the present embodiment, the control device 47 uses the input power to the driving means such as the motor 15 in the minute unbalance control at the start of high-speed dewatering in order to quickly increase the rotation speed of the drum 3 to the target rotation speed. Is set to a value obtained by adding the above-mentioned input power for preheat heating.

  For example, if the input power for preheat heating is 300 W, for example, the control device 47 uses the initial condition of step S301 (see FIG. 6) in the minute unbalance control in step S501, for example, as in the first embodiment. In the setting, the upper limit input power is set to 1020 W (= 720 W + 300 W) obtained by adding the input power for preheating heating to the original upper limit value of 720 W. Accordingly, the first reference input power is set to 1000 W (= 720 W + 300 W−20 W) and the second reference input power is set to 970 W (= 720 W + 300 W−50 W). Then, minute unbalance control is performed according to these conditions.

  Alternatively, when performing the same control as in the second embodiment, the control device 47 preheats the upper limit input power to 720 W, which is the original upper limit value, in the initial condition setting in step S401 (see FIG. 9). Is set to 1020 W (= 720 W + 300 W) including the input power, and the provisional upper limit input power is set to 1170 W (720 W + 300 W + 150 W), and minute unbalance control is performed according to these conditions.

  Thereafter, the control device 47 performs control so as to rotate the drum 3 at the target rotational speed, as in the first embodiment or the second embodiment. When the rotational speed of the drum 3 reaches the target rotational speed and the stable operation (S104) is started, the upper limit input power is lowered to the original value (720W), and then the refrigeration cycle including the heat pump 34 is performed in step S502. Drive. Thereby, high-speed dehydration is possible in a state where hot air is supplied, and drying of the laundry is promoted to improve the dehydration rate.

In this way, by setting the upper limit input power to a value obtained by adding the input power for preheating heating in the minute unbalance control, the input power to the drum 3 can be increased and the drum 3 can be rotated at the target rotational speed. Thus, the dehydration rate can be improved. Further, since the upper limit input power is raised, the rotation speed of the drum 3 can be quickly raised to the target rotation speed, and the dehydration time can be shortened.
In particular, in the third embodiment, since warm air is supplied to the drum 3 during high-speed dewatering by preheat heating, the dewatering rate can be further improved.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The numerical values such as the input power, the rotation speed, and the number of unbalance detection attempts shown in each embodiment are merely examples, and the present invention is not limited thereto.
The first embodiment and the second embodiment may be combined. That is, even when the maximum input power is temporarily increased (corresponding to the second embodiment), if the rotation speed of the drum 3 does not reach the target rotation speed, the drum 3 is kept at the actual rotation speed for a predetermined time. You may make it perform control which rotates and reduces actual input electric power (equivalent to 1st Embodiment). Further, the first to third embodiments may be combined.

  In each embodiment, although the example which applied this invention to the heat pump type washing dryer was shown, you may apply to not only this but a heater type washing dryer. Moreover, you may apply not only to a drum type but to a vertical-axis type washing-drying machine.

  In the drawings, 1 is a washing / drying machine, 2 is a water tank, 3 is a drum (rotary tank), 15 is a motor (drive means), 22 is a blowing means, 27 is a circulation air passage, 34 is a heating means, 36 is a drying means, 47 is a control device (control means, current detection means, rotation speed detection means, unbalance detection means), 49 is a current detection sensor (current detection means), 50 is a rotation sensor (rotation speed detection means), and 51 is an acceleration sensor ( Reference numeral 53 denotes an unbalance detection means, and reference numeral 53 denotes a drive circuit (drive means).

Claims (3)

A tank,
A rotating tank provided rotatably in the water tank;
Provided in a circulating air passage formed including the water tank and the rotating tank, has a blowing means and a heating means, and supplies the warm air generated by the blowing means and the heating means to the rotating tank through the water tank Drying means to
Drive means for rotationally driving the rotary tank;
Power detection means for detecting input power input to the drive means;
Rotation speed detection means for detecting the rotation speed of the rotary tub rotated by the drive means;
Unbalance detecting means for detecting an unbalance of the rotating tub rotated by the driving means;
Based on the input power detected by the power detection means, the rotation speed of the rotary tank detected by the rotation speed detection means, and the amount of unbalance of the rotary tank detected by the unbalance detection means, Control means for controlling the drive means so that the rotating tank rotates at a predetermined target rotational speed or less, and the unbalance is equal to or less than a predetermined maximum input power,
In the dehydrating operation that is performed prior to the drying operation using the warm air supplied from the drying unit, the control unit performs the actual operation of the rotating tub when the input power reaches a predetermined range with respect to the maximum input power. When the rotational speed is lower than the target rotational speed by a predetermined rotational speed or more, the actual rotational speed is set as a temporary target rotational speed, the rotating tank is rotated at the temporary target rotational speed for a predetermined time, and the predetermined time is A washing and drying machine, wherein after the elapse of time, the rotating tub is rotated again at the target number of rotations. A tank,
A rotating tank provided rotatably in the water tank;
Provided in a circulating air passage formed including the water tank and the rotating tank, has a blowing means and a heating means, and supplies the warm air generated by the blowing means and the heating means to the rotating tank through the water tank Drying means to
Drive means for rotationally driving the rotary tank;
Power detection means for detecting input power input to the drive means;
Rotation speed detection means for detecting the rotation speed of the rotary tub rotated by the drive means;
Unbalance detecting means for detecting an unbalance of the rotating tub rotated by the driving means;
Based on the input power detected by the power detection means, the rotation speed of the rotary tank detected by the rotation speed detection means, and the amount of unbalance of the rotary tank detected by the unbalance detection means, Control means for controlling the drive means so that the rotating tank rotates at a predetermined target rotational speed or less, and the unbalance is equal to or less than a predetermined maximum input power,
In the dehydration operation performed prior to the drying operation by the hot air supplied from the drying unit, the control unit is configured to change the input power to the maximum input power before the actual rotation number of the rotating tank reaches the target rotation number. When it reaches, the value of said maximum input electric power is increased temporarily, The washing dryer characterized by the above-mentioned. The drying means is configured to be able to supply hot air even during dehydration operation,
The control means sets the value of the maximum input power at the start of the dehydration operation to a value including the power supplied to the drying means, and the rotating tub supplies the warm air from the drying means to the target rotational speed. 3. The washing / drying machine according to claim 1, wherein the washing / drying machine is controlled so as to start after reaching.

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