JP2018007938A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an efficient drying operation in executing a washing and drying course.SOLUTION: A washing and drying machine includes: a water tub; a rotary tub which is arranged in the water tub and in which clothing is stored; a heater for hot water provided at a position at which the washing water in the water tub is stored and for heating the washing water; a drying mechanism including a circulation fan and for circulating and supplying warm air into the rotary tub; and control means for controlling a washing operation including a washing step, a rinsing step and a dewatering step and a drying operation by the drying mechanism. The control means is constituted so as to execute a washing and drying course in which a drying operation is performed after a washing operation, and, while executing the dewatering step in the washing and drying course, it executes a pre-heating operation for controlling the electricity conduction of the heater for hot water so that the output becomes lower than the output when heating the washing water.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a washing dryer.

  For example, some drum-type washing and drying machines include a heat pump that generates hot air using the heat of a condenser as a drying mechanism (see, for example, Patent Document 1). In this case, the heat pump has a problem that the rise in temperature rise is relatively poor, and there is a problem that it takes time for the drying operation. Therefore, in Patent Document 1, an electric heater for heating the heat pump is provided in the circulation path of the drying air, and the heat pump is turned on to heat the heat pump during the dehydration process before the drying operation. It has been disclosed to improve the rise of the rise and shorten the drying time.

JP 2006-149759 A

  In the above, in order to improve the rise in the temperature rise of the heat pump, it is necessary to provide an electric heater for heating the heat pump, and there arises a problem that a space for newly installing the electric heater must be secured. .

  Accordingly, a laundry dryer that can perform an efficient drying operation in executing the laundry drying course is provided.

  The washing and drying machine of the present embodiment includes a water tank, a rotating tank that is disposed in the water tank and in which clothes are stored, a heater for hot water that is provided at a position where the washing water in the water tank is accumulated, and heats the washing water, A drying mechanism that includes a circulation fan and circulates hot air into the rotating tub, a washing operation including a washing process, a rinsing process, and a dehydrating process, and a control unit that controls a drying operation by the drying mechanism, The control means is configured to be able to execute a washing / drying course in which a drying operation is performed after the washing operation, and is lower than an output when heating the washing water during the dehydration process in the washing / drying course. The present invention is characterized in that a preheating operation for controlling energization of the hot water heater is executed so as to obtain an output.

1 is a vertical right side view schematically showing an internal configuration of a washing / drying machine according to the first embodiment. Rear view schematically showing the internal configuration of the washing and drying machine Block diagram showing the electrical configuration of the washing and drying machine The figure which shows the electricity supply rate to the heater for warm water The 2nd Embodiment shows the relation between the stroke in the preheating operation, the on / off of the circulation fan, and the energization rate of the heater. The 3rd Embodiment is a figure which shows the relationship between the stroke | process in the preheating operation | movement, on / off of a circulation fan, and the energization rate of a heater. The 4th Embodiment is a figure which shows the relationship between the process in a preheating operation | movement, and the electricity supply rate of the heater for warm water. The figure which shows 5th Embodiment and shows the relationship between the rotation speed of a drum and the electricity supply rate with respect to the heater for warm water. The 6th Embodiment shows the relationship between the temperature detected by the heater temperature sensor and the opening / closing of the exhaust damper. The 7th Embodiment is a figure which shows the relationship between the detection temperature of a heater temperature sensor, and the opening degree of an exhaust damper. The 8th Embodiment is a figure which shows the relationship between the detection temperature of a heater temperature sensor, and the opening degree of an exhaust damper.

  Hereinafter, some embodiments applied to a drum-type washing / drying machine having a washing function and a drying function will be described with reference to the drawings. In addition, about the part which is common between several embodiment, the same code | symbol is attached | subjected and new illustration and repeated description are abbreviate | omitted.

(1) First Embodiment A first embodiment will be described with reference to FIGS. First, the overall configuration of the drum-type washing / drying machine 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. The outer box 2 constituting the main body of the washing / drying machine 1 has a substantially rectangular box shape, and a cylindrical water tank 3 is inclined downwardly in the outer box 2 through an elastic support mechanism (not shown). It is supported. A cylindrical drum 4 serving as a rotating tub for storing clothes (laundry) is rotatably supported in the water tub 3. The drum 4 is configured to rotate around an inclined axis extending in the front-rear direction and inclined backward and downward.

  As shown in FIG. 1, the peripheral wall and rear wall of the drum 4 are formed with a large number of holes 4a for water passage and ventilation, and the inner surface of the peripheral wall of the drum 4 is used for stirring laundry. A plurality of baffles (not shown) are provided. Although not shown, the front surface of the drum 4 is provided with an opening through which clothes are put in and out. The front surface of the water tank 3 is formed with a charging port that is continuous with the opening, and the front surface of the outer box 2 is provided with a door 5 that opens and closes the charging port. An operation panel 6 is provided on the upper portion of the front surface of the outer box 2.

  As shown in FIGS. 1 and 2, a drum motor 8 made of, for example, an outer rotor type brushless motor is disposed at the rear of the water tank 3. The tip of the rotating shaft of the drum motor 8 passes through the back surface of the water tank 3 and protrudes into the water tank 3, and is connected and fixed to the center of the rear part of the drum 4. With this configuration, the drum 4 is directly driven to rotate by the drum motor 8.

  As shown in FIG. 2, a water supply device 7 for supplying water into the water tank 3 is provided in the upper portion of the outer box 2. Although not shown in detail, the water supply device 7 includes a water supply valve 11 (see FIG. 3) connected to a water tap as a water supply source via a connection hose 10, a water injection case 9 having a detergent charging case that can be pulled out, and the like. It is composed of On the other hand, as shown in FIG. 1, a drainage pipe 12 is connected to the lower part of the water tank 3, and a drainage valve 13 is provided in the middle of the drainage pipe 12. When water is supplied from the water supply device 7 into the water tank 3 with the drain valve 13 closed, the water is stored in the water tank 3. At this time, the water level in the water tank 3 is detected by a water level sensor 36 (see FIG. 3). As the drain valve 13 is opened, the water stored in the water tank 3 is discharged to the outside through the drain pipe 12.

  As shown in FIG. 1, a warm water heater 14 is provided at a position in the bottom of the water tank 3 (below the drum 4) where washing water is accumulated. The warm water heater 14 is composed of, for example, a sheathed heater, and is energized when the course of washing laundry with warm water is performed to heat the water in the water tank 3. Further, the warm water heater 14 is provided with a heater temperature sensor 15 comprising, for example, a thermistor for detecting the temperature of the warm water heater 14, for example, the surface temperature. A water temperature sensor 16 (shown only in FIG. 3) for detecting the temperature of the stored washing water is also provided in the vicinity of the warm water heater 14 in the water tank 3.

  Note that the operation panel 6 is provided with various operation units 35 in addition to the power-on switch 32, the power-off switch 33, and the display unit 34 (all are shown only in FIG. 3). In the present embodiment, the user can operate the operation unit 35 to set a course of driving, thereby instructing execution of a washing / drying course in which a drying operation is executed continuously after the washing operation. . In addition, the user can select and set hot water washing so that a washing operation (washing process) using hot water such as 40 ° C. and 60 ° C. can be specified. A control device 31 (see FIG. 3) constituting control means is provided on the back side of the operation panel 6. This control device 31 is mainly composed of a microcomputer, for example, and controls the entire washing and drying machine 1.

  As shown in FIG. 1, the water tank 3 is provided with an air discharge port 17 at a front right side portion of the upper surface and an air supply port 18 at an upper left portion of the back surface portion. As shown in FIGS. 1 and 2, a drying mechanism 19 that circulates and supplies warm air (dry air) into the drum 4 is provided inside the outer box 2. In the present embodiment, the drying mechanism 19 is located outside the water tank 3 and includes a circulation air passage 20 and a heat pump 21. The circulation air passage 20 has an inlet and an outlet, and the inlet is connected to the outlet 17 of the water tank 3 and the outlet is connected to the supply port 18. Further, the drying mechanism 19 includes a circulation fan 22 for supplying the air discharged from the discharge port 17 through the air supply port 18 to the water tank 3 and thus into the drum 4 while circulating in the circulation air passage 20 in the direction of arrow A. ing.

  Specifically, the circulation air passage 20 includes an exhaust duct 23, a heat pump duct 24, and an air supply duct 25. Among them, the exhaust duct 23 has a base end connected to the discharge port 17, extends rearward from the upper right side in the outer box 2, and then bends to extend downward from the rear of the water tank 3. 24 is connected to the base end (right end). A well-known lint filter 26 for capturing lint from the dry air is provided at the front end side portion of the exhaust duct 23.

  The heat pump duct 24 extends leftward and rightward at the bottom rear portion in the outer box 2, and the circulation fan 22 is provided on the front end side (right end side in FIG. 2). The circulation fan 22 includes, for example, a centrifugal fan and a motor that drives the centrifugal fan in a fan casing, and a base end (lower end) of the air supply duct 25 is connected to an outlet of the fan casing. ing. The air supply duct 25 extends upward behind the left water tank 3 in the outer box 2, and a tip end (upper end) thereof is connected to the air supply port 18.

  As shown in FIG. 2, in the heat pump duct 24, an evaporator 27 and a condenser 28 constituting a heat pump (refrigeration cycle) 21 are sequentially arranged on the right and left (left and right in FIG. 2). Although not shown in detail, the heat pump 21 includes a compressor 29 (see FIG. 3), the condenser 28, an expansion valve serving as a decompression unit, and the evaporator 27 connected in a closed loop through a refrigerant pipe. It is configured. A required amount of refrigerant is sealed inside the heat pump 21 and circulates through the refrigerant pipe.

  In the heat pump 21, the gas refrigerant discharged from the compressor 29 flows into the condenser 28 and is condensed by heat exchange in the condenser 28 when the compressor 29 is driven during the drying operation. Refrigerant. The liquid refrigerant that has flowed out of the condenser 28 is expanded by the expansion valve into a mist form, and the mist form refrigerant flows into the evaporator 27. In the evaporator 27, the refrigerant is vaporized by heat exchange with the outside air, and the gaseous refrigerant is returned to the compressor 29. Circulation is performed in which the refrigerant is compressed by the compressor 29 and discharged at a high temperature and high pressure.

  As the heat pump 21 is driven and the circulation fan 22 is driven, the air in the water tank 3 (drum 4) passes through the exhaust duct 23 from the outlet 17 as shown by an arrow A in FIGS. To the heat pump duct 24, flows through the heat pump duct 24, passes through the evaporator 27 and the condenser 28 in order, then flows into the air supply duct 25, and is supplied into the drum 4 through the supply port 18 and the hole 4 a. The circulation is performed. Due to the circulation of the air, the air containing a large amount of vapor is deprived of moisture from the clothes in the water tank 3 (drum 4) and is cooled through the evaporator 27 portion in the heat pump duct 24, thereby condensing the vapor. (Or sublimation) and dehumidified, and the dehumidified air is heated by passing through the condenser 28 portion to become dry warm air, and is supplied again into the drum 4 to be used for drying clothes.

  Further, an exhaust device 30 is provided in the middle of the exhaust duct 23. The exhaust device 30 includes an exhaust port 30a for exhausting the air in the circulation air passage 20 (and thus the air in the water tank 3) to the outside of the outer box 2, an exhaust damper 30b for opening and closing the exhaust port, and the outside air. It is configured with an intake port for intake. The exhaust damper 30b is operated using, for example, a motor as a drive source, and the opening area of the exhaust port can be adjusted. Thus, when the exhaust damper 30b is operated and the exhaust port 30a is opened while the circulation fan 22 is driven, a part of the air passing through the circulation air passage 22 is exhausted to the outside of the outer box 2. At this time, outside air is taken into the circulation air passage 20 from the intake port.

  FIG. 3 schematically shows an electrical configuration of the washing / drying machine according to the present embodiment, centering on the above-described control device 31. The control device 31 receives operation signals from the power-on switch 32, the power-off switch 33, and various operation units 35 of the operation panel 6, and the control device 31 controls the display on the display unit 34 of the operation panel 6. To do. Further, detection signals from the water temperature sensor 16, the heater temperature sensor 16, and the water level sensor 36 are input to the control device 31. The control device 31 controls the water supply valve 11, the drain valve 13, the exhaust damper 30a, the warm water heater 14, the drum motor 8, the compressor 29 of the heat pump 21, and the circulation fan 22 (fan motor).

  With the above-described configuration, the control device 31 can control each mechanism of the washing and drying machine 1 based on the input signal from each sensor and the control program stored in advance according to the operation course set by the user in the operation unit 35. And a washing operation including a known washing process, rinsing process, and dehydration process, and a drying operation are automatically executed. At this time, as described above, when the user sets the hot water cleaning, the hot water heater 14 is operated when the water is supplied in the washing process, and the washing water accumulated in the water tank 3 is, for example, 40 ° C. or 60 ° C. It is considered warm water. As described above, the washing performance can be improved by executing the washing process using warm water. In this case, in the washing process, the hot water heater 14 is energized at an output (energization rate) of 100%, and is turned on / off based on the detection of the water temperature sensor 16 so as to obtain hot water of the target temperature. It has become.

  In the present embodiment, the control device 31 is configured to be able to execute a washing / drying course in which the drying operation is performed continuously after the washing operation. During the dehydration process, the preheating operation for operating the hot water heater 14 is executed. In this preheating operation, as shown in FIG. 4, the heater for hot water 14 is operated at a lower output than that at the time of normal, that is, hot water generation in the washing process, for example, an energization rate (voltage value) of 60%. It has become. Control of the energization rate (voltage value) of the warm water heater 14 is performed by phase control.

  Next, the operation of the washing / drying machine 1 having the above configuration will be described. When the user wants to execute a washing / drying course in which the drying operation is performed continuously after the washing operation, the user puts clothes into the drum 4 and puts a necessary amount of detergent into the detergent charging case, and then the operation panel 6. The washing / drying course is set by operating the operation unit 35 and a start operation is performed. In addition, the user can also set warm water washing | cleaning using warm water other than the normal washing | cleaning which uses tap water as it is for a washing operation (washing process).

  When the operation is started, water is supplied and the washing process is executed for a predetermined time. At this time, when warm water cleaning is set, the warm water heater 14 is turned on at an energization rate of 100%, and a washing process using warm water of a predetermined temperature is executed. When warm water cleaning is not set, the warm water heater 14 is not turned on, and a washing process using normal temperature tap water is performed. When the washing process is completed, the first dehydration process is performed. After this, the rinsing process is performed, and when the rinsing process is completed, the dehydration process (final dehydration) is performed.

  In this embodiment, a preheating operation for operating the warm water heater 14 is performed in the process of dehydration (final dehydration). In this preheating operation, the warm water heater 14 is operated at a lower energization rate than normal, that is, when the hot water is generated in the washing process, for example, an energization rate of 60%. Further, the circulation fan 22 may be operated during the preheating operation. As described above, during the dehydration process, the preheating operation for operating the warm water heater 14 is performed, whereby the air and clothes in the drum 4 are heated. Efficient dehydration is performed by heating the clothes.

  Here, the warm water heater 14 is for heating a liquid used in a state immersed in water (liquid atmosphere). For example, a sheathed heater having a high watt density (7 to 10 W / cm @ 2) is employed. Such a heater for hot water 14 is different from that for gas heating, and if it is energized during the dehydration process, the temperature may become too high. In the present embodiment, in the preheating operation, the warm water heater 14 is operated at an output (energization rate) lower than normal (during hot water generation), and therefore, an increase in the temperature of the warm water heater 14 can be suppressed. It can be used even in an air atmosphere as long as the maximum allowable temperature is not exceeded. Since the drum 4 is rotating at high speed, wind is generated in the water tank 3. Wind comes into contact with the surface of the hot water heater 14. This also provides a certain effect of suppressing the temperature rise of the warm water heater 14. Furthermore, the effect of suppressing the temperature rise of the hot water heater 14 can be obtained by operating the circulation fan 22 during the preheating operation.

  When the dehydration process is finished, the warm water heater 14 is turned off, the preheating operation is finished, and the drying operation is continued. This drying operation is performed by turning on the heat pump 21 and operating the circulation fan 22. In this case, since the preheating operation is performed during the dehydration process, the drying operation is started in a state where the temperature of the inside of the drum 4 and the clothes is raised to some extent. Thereby, efficient drying becomes possible and the time required for the drying operation can be shortened.

  Thus, according to this embodiment, since the preheating operation which operates the heater 14 for hot water is performed during execution of the dehydration process in the washing and drying course, an efficient drying operation can be performed. In this case, since the warm water heater 14 for generating warm water used for the washing operation is also used for drying, it is not necessary to add a new configuration, and a simple configuration can be used. . Further, in the preheating operation, the warm water heater 14 is operated at an output (energization rate) lower than normal (during hot water generation), so that an increase in the temperature of the warm water heater 14 can be suppressed. It can withstand use in an atmosphere.

(2) Second to Fifth Embodiments FIG. 5 shows a second embodiment. The difference from the first embodiment is that the controller 31 performs preheating in a washing and drying course. It is in the mode of operation control. FIG. 5 shows the relationship between the rotation speed of the drum 4, the on / off state of the circulation fan 22, the output of the hot water heater 14 in this case in the rinsing and dehydrating processes after the washing process is completed, Show. That is, in the second embodiment, when the washing process is completed in the washing and drying course, the first dehydration process, the first rinsing process, the second dehydrating process, the second rinsing process, and the final dehydrating process are executed in order. .

  Then, in a plurality of dehydration processes such as the first dehydration process, the second dehydration process, and the final dehydration process, a preheating operation in which the hot water heater 14 is operated at a relatively low output (energization rate) is performed. During the rotation of the drum 4, the circulation fan 22 of the drying mechanism 19 is operated. At this time, the drum rotation speed is increased as the subsequent dehydration process is performed. Further, in a plurality of dehydration strokes, the output (energization rate) of the hot water heater 14 is controlled so that a later dehydration stroke is lower than a previous dehydration stroke among the plurality of dehydration strokes. ing. Specifically, in the first dehydration process, the energization rate of the hot water heater 14 is 60%, in the second dehydration process, the energization rate of the hot water heater 14 is 55%, and in the final dehydration process, hot water The energization rate of the heater 14 is 50%.

  According to the second embodiment, an operational effect equivalent to that of the first embodiment can be obtained. In addition, by operating the circulation fan 22 in the preheating operation, the air warmed by the warm water heater 14 in the water tank 3 can circulate through the circulation air passage 20 and warm the system. It becomes possible to perform a drying operation more efficiently. Further, when the circulating air hits the warm water heater 14, an effect of suppressing the temperature rise can be expected. Since the drum rotation speed is higher in the subsequent dehydration step, the cooling effect of the hot water heater 14 can be increased accordingly.

  Then, as the dehydration process is performed later in the plurality of dehydration processes, the moisture content in the drum 4 and the clothing decreases, so the thermal load (thermal energy required for dehydration or drying) decreases. In other words, the temperature of the warm water heater 14 is more likely to rise in the subsequent dehydration process than in the previous dehydration process. Therefore, an excessive increase in the temperature of the warm water heater 14 can be suppressed by lowering the output (energization rate) of the warm water heater 14 in the subsequent dehydration process.

  FIG. 6 shows the third embodiment. The difference from the second embodiment is that the preheating operation is also performed in the rinsing process, that is, the first rinsing process and the second rinsing process. It is in the point. Furthermore, in this embodiment, the circulation fan 22 is operated not only while the drum 4 is rotating but also when the drum 4 is stopped.

  According to the third embodiment, since the preheating operation can be performed for a longer time in addition to the same operations and effects as the first embodiment, the drying time can be further shortened. To be effective. Further, even when the drum 4 is stopped, by operating the circulation fan 22, wind can be generated and applied to the warm water heater 14, and an increase in the temperature of the warm water heater 14 can be suppressed.

  FIG. 7 shows a fourth embodiment. The difference from the second and third embodiments is that the warm water heater 14 is used when performing the preheating operation in a plurality of dehydration steps. This is in that the energization time is shortened. In this case, for each of the first dehydration process, the second dehydration process, and the final dehydration process, the hot water heater 14 is energized with respect to the time during which the drum 4 is rotated at the target rotational speed. According to this, an excessive increase in the temperature of the warm water heater 14 can be suppressed by relatively shortening the energization time of the warm water heater 14.

  FIG. 8 shows a fifth embodiment. In this embodiment, the control device 31 increases the output (energization rate) of the heater 14 for hot water in the preheating operation in accordance with the dehydration rotation number of the drum 4 as the rotation number increases. To control. Specifically, when the rotation speed of the drum 4 is 1500 rpm, the energization rate of the warm water heater 14 is 60%, and when the rotation speed of the drum 4 is 1400 rpm, the energization rate of the warm water heater 14 is 55%. When the rotational speed of the drum 4 is 1200 rpm, the energization rate of the hot water heater 14 is set to 50%.

  In this case, due to the rotation of the drum 4, wind is generated in the water tank 3, and not a little air is blown to the warm water heater 14. At this time, the higher the dehydration speed of the drum 4, the greater the amount of air blown to the hot water heater 14, and accordingly, the temperature of the hot water heater 14 can be lowered. In other words, the higher the number of revolutions of the drum 4, the higher the energization rate without excessively increasing the temperature of the heater 14 for hot water. Can do a lot.

(3) Sixth to Eighth Embodiments and Other Embodiments FIG. 9 shows a sixth embodiment, and the difference from the first embodiment is as follows. That is, in the present embodiment, the control device 31 initially closes the damper 30b during the preheating operation, and the temperature of the hot water heater 14 detected by the heater temperature sensor 15 reaches a predetermined value, for example, 100 ° C. When it reaches, the exhaust damper 30b of the exhaust device 30 is opened, and the air in the water tank 3 is exhausted from the exhaust port 30a of the exhaust duct 23. Further, during this preheating operation, the circulation fan 22 is operated.

  In this case, by opening the exhaust damper 30b, the high-temperature air in the water tank 3 is exhausted, and external relatively low-temperature air can be taken from the intake port into the circulation air passage 20 and thus into the water tank 3, The temperature of the heater 14 can be lowered. In the present embodiment, it is possible to prevent the temperature of the warm water heater 14 from rising excessively, for example, to 130 ° C. or more.

  FIG. 10 shows a seventh embodiment, which differs from the sixth embodiment in the following points. That is, the exhaust device 30 is configured to be able to adjust the exhaust amount by opening control such as 30%, 50%, and 100% of the exhaust damper 30b. Then, during the preheating operation, the control device 31 adjusts the exhaust amount by controlling the exhaust damper 30b so as to increase the exhaust amount as the detected temperature increases in accordance with the detected temperature of the heater temperature sensor 15. Let

  Specifically, at the beginning of the preheating operation, the damper 30b is closed, and when the temperature of the hot water heater 14 detected by the heater temperature sensor 15 reaches a first threshold, for example, 100 ° C., The exhaust damper 30b of the exhaust device 30 is opened at an opening of 50%, and the air in the water tank 3 is exhausted from the exhaust port 30a of the exhaust duct 23. Further, after that, when the temperature of the hot water heater 14 reaches a second threshold value, for example, 120 ° C., the exhaust damper 30b is opened at 100% opening to increase the exhaust amount from the water tank 3. To do.

  According to the seventh embodiment, similarly to the sixth embodiment, it is possible to prevent the temperature of the warm water heater 14 from rising excessively, for example, to 130 ° C. or more. In addition, since the exhaust amount is adjusted, more appropriate exhaust control can be performed in order to prevent an excessive increase in the temperature of the hot water heater 14.

  FIG. 11 shows an eighth embodiment. In the eighth embodiment, the control device 31 closes the damper 30b at the beginning of the preheating operation, and the temperature of the hot water heater 14 detected by the heater temperature sensor 15 reaches the first threshold, for example, 100 ° C. When reaching, the exhaust damper 30b of the exhaust device 30 is opened at an opening of 50%, and the air in the water tank 3 is exhausted. Then, for a while after that, the detected temperature of the heater temperature sensor 15 exceeds 100 ° C., but when the temperature decreases to 100 ° C., the opening degree of the exhaust damper 30b is adjusted to 30%. Also by this, since the exhaust amount of the exhaust device 30 is adjusted, appropriate exhaust control can be performed in order to prevent an excessive increase in the temperature of the hot water heater 14.

  In addition, although illustration is abbreviate | omitted, as another embodiment, the control apparatus 31 can also be set as the structure which drives the heat pump 21 before the start of drying operation during execution of a preheating operation. In the heat pump 21, there is a situation that it takes a relatively long time from the start of driving to the time when the components are warmed and the sufficient performance of generating hot air is exhibited. Therefore, by performing so-called preheating in which the heat pump 21 is driven before the start of the drying operation, the rise of the temperature rise of the heat pump 21 can be accelerated and the drying time can be shortened.

  However, in this case, since the washing / drying machine 1 has a limitation on the entire input power (for example, 1500 W), in order to drive the heat pump 21, it is necessary to set the energization rate of the heater 14 for hot water to a predetermined value or less. As a specific example, the input of the drum motor 8 in the dehydration process is 600 W, and the input of the heat pump 21 (the compressor 29 and the circulation fan 22) is 400 W. In the initial stage of the dehydration process, water remains so much that the warm water heater 14 is cooled by the water, so the output (energization rate) must be relatively large (for example, 700 W) in order to increase the temperature of the warm water heater 14. I must. However, with this, since it becomes 1700 W as a whole and exceeds the limit (1500 W), the heat pump 21 cannot be driven.

  However, since, for example, from the second dehydration process, the amount of water is small and cooling cannot be achieved, and thus the energization rate is lowered (for example, 400 W) in order to suppress an excessive temperature rise of the hot water heater 14. If the input of the warm water heater 14 is 400 W, the total is 1400 W, which can be kept within the limit, so that the heat pump 21 can be driven. In this way, when the energization rate (input power) of the heater 14 for hot water is equal to or less than a predetermined value, the heat pump 21 is driven to accelerate the rise of the temperature rise of the heat pump 21 without exceeding the input limit. The drying operation time can be shortened.

  Further, in each of the above-described embodiments, the energization rate is changed by phase control in order to adjust the output of the hot water heater. However, the present invention is not limited to this, and for example, the supply voltage itself to the hot water heater is lowered. As a result, the output can be reduced. Alternatively, it is also possible to adopt an adjustment method such as adjusting the ON ratio by simply controlling the on / off time, or turning off some of the heaters in the case of a plurality of heaters to reduce the output. .

  In addition, the drying mechanism is not limited to one provided with a heat pump, and may be provided with a heater and a circulation fan. Various changes can be made to the number of strokes in the washing / drying course, for example, the number of times of dehydration and rinsing, and the structure of the washing / drying machine, such as the circulation air passage and the exhaust device. Furthermore, specific numerical values such as output (energization rate), various temperatures serving as threshold values, and drum rotation speeds in the above-described embodiments are merely examples, and can be appropriately changed. For example, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

  In the drawings, 1 is a washing / drying machine, 2 is an outer box (main body), 3 is a water tank, 4 is a drum (rotary tank), 14 is a heater for hot water, 15 is a heater temperature sensor, 19 is a drying mechanism, and 20 is circulating air. The path, 21 is a heat pump, 22 is a circulation fan, 29 is a compressor, 30 is an exhaust device, 30a is an exhaust port, 30b is an exhaust damper, and 31 is a control device (control means).

Claims (9)

A tank,
A rotating tub disposed in the water tub and containing clothes;
A heater for warm water provided at a position where the wash water in the water tank is accumulated and heating the wash water;
A drying mechanism including a circulation fan and circulatingly supplying hot air into the rotary tank;
A washing operation including a washing process, a rinsing process, a dehydrating process, and a control means for controlling a drying operation by the drying mechanism,
The control means is configured to be able to execute a washing / drying course in which a drying operation is performed after the washing operation,
A washing and drying machine that executes a preheating operation for energizing and controlling the heater for hot water so that the output becomes lower than the output when heating the washing water during the dehydration process in the washing and drying course.   The washing / drying machine according to claim 1, wherein the control means operates the circulation fan during rotation of the rotating tub during execution of the preheating operation.   3. The washing and drying machine according to claim 1, wherein the control unit operates the circulation fan while the rotary tub is stopped during execution of the preheating operation. In the washing and drying course, the dehydration process is executed a plurality of times,
The said control means controls the output of the said heater for warm water in the said pre-heating operation so that the dehydration process after the previous dehydration process is lower than the previous dehydration process among a plurality of dehydration processes. The washing dryer according to any one of 3.   5. The control unit according to claim 1, wherein the controller controls the output of the warm water heater in the preheating operation so that the output is increased as the rotational speed is higher, in accordance with the dewatering rotational speed of the rotating tank. The washing dryer according to claim 1. An exhaust device that exhausts the air in the water tank to the outside, and a heater temperature sensor that detects the temperature of the warm water heater,
The said control means makes the air in the said water tank exhaust by the said exhaust device, when the detection temperature of the said heater temperature sensor exceeds predetermined value during execution of the said preheating operation | movement. The washing dryer according to claim 1. The exhaust device is configured to be capable of adjusting an exhaust amount,
The said control means adjusts the exhaust_gas | exhaustion amount of the said exhaust apparatus so that it may increase an exhaust_air | air_discharge amount, so that detection temperature is high according to the detection temperature of the said heater temperature sensor during execution of the said pre-heating operation. 6. The washing / drying machine according to 6. The drying mechanism is composed of a heat pump,
The said control apparatus is the washing-drying as described in any one of Claim 1 to 7 which drives the said heat pump when the output of the said heater for warm water is below a predetermined value during execution of the said pre-heating operation | movement. Machine.   The washing and drying machine according to any one of claims 1 to 8, wherein the control unit causes the preheating operation to be executed also in the rinsing process.

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