JP2017189271A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and dewatering machine which eliminates discomfort when touching clothing after washing in winter, by suppressing temperature unevenness and warming the clothing efficiently, and also which can reduce dewatering wrinkles of clothing.SOLUTION: A washing and drying machine includes: a housing; an outer tub supported in the housing in a vibration-proof manner, and for storing washing water inside; a washing and dewatering tub which is supported by the outer tub in a rotatable manner and in which laundry is stored; a driving device for rotationally driving the washing and dewatering tub; drying means for blowing warm air into the washing and dewatering tub; and control means for controlling execution of each step of washing, rinsing, dewatering and drying. After the last dewatering step, the control means executes a loosening step of driving the driving device, peeling laundry attached to the washing and dewatering tub and reducing entangling of the laundry, and after the loosening step, it executes a warm air agitation step of driving the driving means and operating the drying means while agitating the laundry.SELECTED DRAWING: Figure 6

Description

  The present invention relates to hot air control for vertical and drum type washer / dryers.

  When clothes are washed after washing, it is uncomfortable with the coldness of the clothes, especially in winter. Compared to the summer, thick clothing increases, the area where cloths such as heels and sleeves are doubled, and the trousers of the trousers are poorly dried, and only that part is easily moistened for a long time.

  Furthermore, regardless of the season, when drying clothes after washing, in order to reduce the wrinkles of clothes as much as possible, many people have taken measures such as shaking the clothes several times to stretch the wrinkles and then putting them on hangers. Depending on the clothes, ironing is necessary after drying, and if there are many wrinkles on the clothes, the time for ironing increases, or ironing is performed while pressing the clothes with a great force, which requires time and labor.

  Conventionally, as in Patent Document 1 (Japanese Patent Laid-Open No. 2004-49644), an outer tub and an inner tub that is rotatably supported inside the outer tub are provided, and laundry and washing liquid are placed inside the inner tub. Washing operation performed in the state of being put together, draining operation for discharging the washing liquid from the inside of the inner tank and the outer tank after the washing operation, rinsing operation for washing the laundry after the draining operation, and inner tank after the rinsing operation The dehydration operation in which the water in the laundry is shaken by rotating the fan by centrifugal force, and the dehydration operation in the washing and drying machine (washing machine) that can dry the clothes in the tub by applying warm air with the blower fan and heater There is a washing machine that turns on the blower fan and heater and heats the clothes by warm air.

  In addition, as in Patent Document 2 (Japanese Patent Laid-Open No. 2003-310774), there is a washing machine with a loosening function that loosens clothes attached to the wall surface of the inner tub after dehydration operation, reduces wrinkling of clothes, and makes it easy to take out. is there. In a washing machine equipped with such a loosening function, not only during dehydration operation but also during unwinding operation, warm air can be put into the tub to warm the clothes.

Japanese Patent Laid-Open No. 2004-49644 JP 2003-310774 A

  The results of actually measuring the temperature of clothing will be described for the case where hot air is applied during dehydration (case A) and the case where hot air is applied during loosening (case B). FIG. 3 is an outline of the washing process of case A and case B. In case A, washing, rinsing, and dehydration are performed in this order. During the dehydration, warm air is applied to the clothing for 4 minutes, and finally the loosening operation is performed. Case B is washed, rinsed, dehydrated and loosened in this order, and warm air is applied to the clothing for 3 minutes during loosening. The experimental fabric weight is 2.0kg (mixed real clothing of cotton and synthetic fiber), and the water temperature is 20 ± 2 ℃. The temperature of the clothing was measured by attaching a small temperature logger (resolution: 0.5 ° C.) for temperature measurement to nine of the 2.0 kg clothing.

  FIG. 4 shows the measurement results. In case A, the maximum temperature of the nine clothes was 20.0 to 28.0 ° C. (temperature unevenness 8.0 ° C.), and the average maximum temperature was 24.5 ° C. (average temperature increase 6.0 ° C.). In Case B, the maximum temperature was 22.5 to 30.5 ° C. (temperature unevenness 8.0 ° C.), and the average maximum temperature was 27.6 ° C. (average temperature increase 8.6 ° C.).

  When warm air is applied during dehydration of Case A, the clothing is stuck in a cylindrical shape on the side wall of the inner tub by centrifugal force, so the surface of the clothing on the center side of the inner tub (inside the cylinder) Hot air hits, but hot air does not hit clothes on the side wall side (outside of the cylinder) of the inner tub. For this reason, the temperature rises only in the clothing on the center side, temperature unevenness is likely to occur, and the temperature in the outer clothing hardly rises, so the temperature rise in the entire clothing is small. Furthermore, the moisture discharged by dehydration is also heated, and the heating efficiency of clothing is poor. In the method of applying warm air to the case B, the clothes having a reduced water content after dehydration are loosened, so that hot air is more likely to hit various places than the case A. For this reason, the increase value of the average temperature of clothing becomes large. However, the loosening operation is mainly aimed at peeling the clothes stuck to the inner tub, so that the clothes are not sufficiently replaced, and the temperature unevenness is large.

  Also, as for the wrinkles of clothes after washing operation, in case A, the clothes being dehydrated are pressed against the side wall of the inner tub by centrifugal force, and the twist and entanglement of the clothes generated during washing are crushed. Many irregular wrinkles (dehydrated wrinkles) are generated. When warm air hits the clothing in this state, the temperature of the dewatering wrinkle part of the inner clothing becomes high, and the dewatering wrinkles often become tighter than when the hot air is not applied.

  On the other hand, in the case of Case B, although improved compared to Case A, the replacement of clothes is not sufficient, and the temperature of the clothes rises with dehydrated wrinkles remaining, so it cannot be said that the reduction of the wrinkles in the clothes is sufficient. .

  The present invention solves the above-mentioned problems, and warms clothes after washing in a state in which unevenness is suppressed and reduces dewatering wrinkles of the clothes.

  As an example, the present invention includes a housing, an anti-vibration support in the housing, an outer tub that stores washing water therein, and a laundry that is rotatably supported in the outer tub and stores laundry. A cum dewatering tub, a drive device for rotating the washing and dewatering tub, and a drying means for blowing warm air into the washing and dewatering tub, and controlling the execution of the washing, rinsing, dewatering and drying processes. In the washing / drying machine comprising the control means, the control means drives the driving device after the final dehydration step to peel off the laundry stuck to the washing and dehydration tub and reduce the tangle of the laundry. After the loosening step, a hot air stirring step is performed in which the driving device is driven to stir the laundry while operating the drying means.

  According to the present invention, clothes can be taken out in a state of being warmed evenly after washing. Further, by warming the clothes, dehydration of the clothes can be reduced and the wrinkle can be suppressed, and ironing is easy for clothes that need to be ironed after drying. In addition, it can quickly dry areas where the dough is double and difficult to dry.

It is an external appearance perspective view of the washing machine (washing dryer) concerning this embodiment. FIG. 2 is a right side sectional view showing a part of a housing and an outer tub cut out in order to show an internal structure of the washing machine (washing / drying machine) shown in FIG. 1. It is process drawing of the washing course of the conventional washing machine (washing dryer). It is the clothing temperature at the time of carrying out a warm air driving | running with the conventional washing machine (washing dryer). FIG. 3 is a block diagram of a control system of the washing machine (washing / drying machine) shown in FIG. 2. It is a flowchart of the control processing which the microcomputer in the controller of the control system shown in FIG. 5 performs. FIG. 7 shows the fabric entanglement, temperature and dehydration unevenness, and the tendency of finishing according to the time period (strength and length of stirring) of hot air stirring in the flowchart shown in FIG. It is an example of the time of the final dehydration of the flowchart shown in FIG. 6, loosening, and warm air stirring. It is the clothing temperature at the time of driving | running with the flowchart shown in FIG. It is a schematic diagram of the drum rotation speed control pattern at the time of final dehydration in the case of the drum type washing machine according to the present embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In the present description, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is an external perspective view of a washing machine (washing / drying machine) according to the present embodiment, and FIG. 2 is a right side sectional view showing a part of a housing and an outer tub cut out in order to show an internal structure. It is.

  The washing / drying machine 1 is a vertical washing / drying machine in which the rotation axis of the washing / dehydrating tub 8 is substantially vertical. An upper surface cover 2a is provided on the upper portion of the housing 2 of the washing / drying machine 1, and an outer lid 3 is provided on the upper surface cover 2a. The outer lid 3 is bent in a mountain shape and opened to the rear side, thereby opening the opening 2 b and allowing clothes (laundry) to be taken in and out of the washing and dehydrating tub 8. Moreover, while the outer lid 3 is closed during washing, at least when the washing and dehydrating tub 8 is rotating or when the inside is hot during drying, the user should not accidentally open the outer lid 3. A lock mechanism (not shown) for the outer lid 3 is provided. A water supply hose connection port 4 from the water tap and a water absorption hose connection port 5 for remaining hot water in the bath are provided on the back side of the upper surface cover 2a. A power switch 6 is provided on the front side of the top cover 2a, and an operation display panel 7 including an operation switch group 7a and a display 7b is provided on the front side of the outer lid 3. The operation display panel 7 is electrically connected to a control device 100 provided at the lower part of the housing 2.

  The bottomed cylindrical washing / dehydrating tub 8 is rotatably supported by the outer tub 9, has a large number of through holes 8b for water flow and ventilation on its outer peripheral wall, and the upper side is open. . The outer tub 9 has a disk-shaped bottom wall portion 9d and a cylindrical peripheral wall portion 9e and is formed in a bottomed cylindrical shape. The outer tub 9 encloses the washing / dehydrating tub 8 on the same axis and is open on the upper side. . In addition, a tank cover 9b is provided at the upper part of the outer tank 9, and has an opening 2b at the approximate center thereof, and an inner lid 9a is provided so as to cover the opening 9f. The user of the washing / drying machine 1 can put clothes in and out of the washing and dewatering tub 8 through the openings 2b and 9f by opening the outer lid 3 and the inner lid 9a.

  A rotary blade 8 a is provided on the inner bottom surface of the washing and dewatering tub 8. A convex stirring rib is formed on the upper surface of the rotary blade 8a. In addition, a driving device 10 is provided at the outer center of the bottom surface of the outer tub 9. The driving device 10 includes a motor 10a and a clutch mechanism 10b, and a rotating shaft 10c of the driving device 10 passes through the outer tub 9 and is coupled to the washing / dehydrating tub 8 and the rotary blade 8a. The clutch mechanism 10b transmits the rotational power of the motor 10a to the washing and dewatering tub 8 and the rotary blade 8a in the dewatering mode, and rotates the rotational power of the motor 10a with the washing and dewatering tub 8 fixed or freely rotated in the stirring mode. It transmits to the wing | blade 8a. The motor 10a includes a rotation sensor 28 configured by a Hall element or a photo interrupter that detects the rotation, and a motor current sensor 29 that detects a current flowing through the motor 10a.

  The detergent / finishing agent charging device 11 is provided on the front side of the top cover 2a. The detergent and finish are passed between the outer tub 9 and the washing / dehydrating tub 8 through the charging hose 11a. The water supply unit 12 is provided on the back side of the top cover 2a. The water supply unit 12 includes a water supply box having a plurality of water passages therein, and a tank water supply electromagnetic valve, a detergent water supply electromagnetic valve, a finishing agent water supply electromagnetic valve, and a cooling water supply water electromagnetic valve connected to each water channel, Tap water from the water supply hose connection port 4 is supplied to the washing / dehydrating tank 8, the detergent / finishing agent input device 11, and a water-cooled dehumidifying mechanism (not shown) to be described later. Further, a bath water absorption pump (not shown) is connected to the water absorption hose connection port 5 so that the bath water can be poured into the washing and dewatering tub 8 through the water injection hose 11b. The tap water from the tank water supply electromagnetic valve is supplied into the washing and dewatering tank 8 through the water injection hose 11b. Further, tap water from the detergent water supply solenoid valve is supplied to the detergent charging chamber of the detergent / finishing agent charging device 11 through the water supply hose 12i. Tap water from the finishing agent water supply solenoid valve is supplied to the finishing agent input chamber of the detergent / finishing agent input device 11 through the water supply hose 12j.

  A drop portion 9 c provided on the bottom surface of the outer tub 9 is connected to communicate with the lower communication pipe 13. The lower communication pipe 13 is connected so as to communicate with the washing water drainage path 15 via the drain valve 14. By closing the drain valve 14, washing water and rinsing water can be stored in the outer tub 9. Further, by opening the drain valve 14, the water in the outer tub 9 can be drained outside the washing / drying machine 1 through the washing water drainage channel 15.

  Further, the lower communication pipe 13 is connected so as to communicate with the washing water circulation channel 18 via a foreign matter removing device 16 and a circulation pump 17 installed at the lower part of the housing 2. The washing water circulation channel 18 is connected so as to communicate with a lint removing device 19 provided above the washing and dewatering tub 8. When the circulation pump 17 is driven, the water in the outer tub 9 flows into the foreign matter removing device 16 through the drop portion 9 c and the lower communication pipe 13 to remove the foreign matter, and flows into the suction port of the circulation pump 17. The water discharged from the discharge port of the circulation pump 17 flows into the waste thread removing device 19 through the washing water circulation channel 18 to remove the waste thread, and the water from which the waste thread has been removed (circulated water) is the waste thread removing device. Water is poured from 19 to spray into the washing and dewatering tank 8.

  The drying duct 20 is installed vertically inside the back surface of the housing 2, and the lower part of the duct is connected to the drop portion 9c of the outer tub 9 by a rubber bellows tube 20a. A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 20, and cooling water is supplied from the cooling water supply electromagnetic valve of the water supply unit 12 to the water-cooled dehumidifying mechanism. The cooling water flows down along the wall surface of the drying duct 20 and enters the drop portion 9 c, and is discharged outside the machine through the lower communication pipe 13 and the washing water drainage path 15. The outlet of the drying duct 20 is connected to the air inlet of the fan 21, and the outlet of the fan 21 is connected to the heater 22. The outlet of the heater 22 is connected to the blowout nozzle 24 via a blower duct 23 and a rubber bellows tube 23a. As described above, in the drying process, high-temperature and high-humidity air containing moisture evaporated from the clothes in the outer tub 9 is water-cooled and dehumidified by the drying duct 20, sucked from the suction port of the fan 21, and discharged from the discharge port of the fan 21. The air thus heated can be heated by the heater 22 and blown out from the blowing nozzle 24 into the washing and dewatering tub 8 as high-temperature and low-humidity wind.

  The outer tub 9 is provided with a pneumatic chamber 25a, and a water level sensor 25 for detecting the water level of the washing water stored in the outer tub 9 is provided on the upper side thereof. The air duct 23 is provided with a temperature sensor 26a for detecting the temperature of the air blown toward the washing and dewatering tub 8 during the drying operation. The drop portion 9c of the outer tub 9 is provided with a temperature sensor 26b for detecting the temperature of the washing water and the temperature of the air sucked into the drying duct 20 during the drying operation. Between the lower communication pipe 13 and the drain valve 14, a temperature sensor 26c for detecting the temperature of the washing water and the temperature of the air discharged from the washing water drainage path 15 during the drying operation is provided. An acceleration sensor 27 that detects vibration acceleration due to vibration of the outer tub 9 is provided on the upper side of the outer tub 9.

  The operation switch group 7a of the operation panel 7 includes a course setting switch for setting the type of operation (washing / drying) to be executed and a mode setting switch for setting the execution method for washing and drying according to the laundry. The course setting switch is equipped with an operation switch for selectively setting the washing course, drying course, and washing / drying course, and the mode switch is an operation switch for selectively setting the standard mode, the handmade mode, the forging mode, etc. Is provided. In addition, an operation switch for setting the amount of water to be washed, time, number of times of rinsing, and dehydration time, and an operation switch for setting a special operation mode such as hot water washing and hot air loosening are provided. Furthermore, a start switch that is operated at the start of the operation to be performed is provided.

  The display device 7b of the operation panel 7 displays the contents set by the operation switch group, and includes a display device that displays the course to be executed, the mode, the amount of water, the time, the number of times, the remaining time of the washing course, and the like.

  FIG. 5 is a block diagram of the control device 100 of the washing / drying machine of the present embodiment. A microcomputer 50 is connected to the operation button input circuit 51 connected to each operation switch group 7a, the water level sensor 25, the temperature sensors 26a, 26b, 26c, the acceleration sensor 27, the rotation sensor 28, and the motor current sensor 29. Various information signals are received in the user's button operation, washing process, and drying process. The output from the microcomputer 50 is connected to the drive circuit 54, and connected to the water supply unit 12, the drain valve 14, the circulation pump 17, the motor 10a, the clutch mechanism 10b, the fan 21, the heater 22, and the like. Control energization. Further, it is connected to a 7-segment light emitting diode or a liquid crystal display 7b, a light emitting diode 52, and a buzzer 53 for notifying the user of the operating state of the washing machine.

  Next, the operation of the washing course of the washing machine (washing / drying machine) according to the present embodiment will be described. The microcomputer 50 is activated when the power switch 6 is pressed, and executes the flow shown in FIG.

Step S501
When the power is turned on, the initialization process of the control processing system is performed, and then the initialization control process of the clutch mechanism 10b is performed. Specifically, the clutch mechanism 10b is controlled so that the drive mode is in the stirring mode.

Step S502
The indicator 7b of the operation panel 7 is turned on, and a washing / drying course is set according to an instruction input from the operation switch group 7a. Here, the operation control when the standard mode of the washing course is selected and the setting switch for the “warm air unwinding” operation is pressed is illustrated. Thereafter, when the start switch is pressed, washing is started.

Step S503
Detect the amount of laundry. This cloth amount detection is performed based on the rotational load acting on the rotary blade 8a at this time by energizing the motor 10a for a short time and rotating the rotary blade 8a in the dry cloth state before water supply. Based on the detected amount of cloth, the amount of washing water and the amount of detergent for generating washing water having a preferred detergent concentration are calculated and determined, and this amount of detergent is displayed on the display 7b.

Step S504
In the water supply, the detergent water supply solenoid valve of the water supply unit 12 is opened, and the detergent contained in the detergent charging chamber of the detergent / finishing agent charging apparatus 11 is supplied along with the water along the outer tub 9 via the charging hose 11a. . Then, after supplying the prescribed amount of water, the detergent water supply valve is closed, and the circulation pump 17 (or the washing and dewatering tank 8 or the rotary blade 8a) is driven to agitate the water and the detergent to dissolve the detergent. Concentrate detergent solution is produced. Then, the tank water supply electromagnetic valve or / and the detergent water supply electromagnetic valve is opened until the amount of water necessary for washing is reached, and water is supplied into the outer tank 9 (in the washing and dewatering tank 8).

Step S505
Electricity is supplied to the motor 10a, and the rotary blade 8a is rotationally driven to execute washing. At this time, the motor 10a is controlled so that the rotary blade 8a rotates forward and backward. Specifically, right rotation-stop-left rotation-stop is repeated. The rotation time (on) and stop time (off) at this time are called an on time period and an off time period, respectively, and the time periods are set in advance according to the amount of cloth and the washing mode. Also, the rotational speed of the stirring blade 8a is set in advance according to the amount of cloth and the washing mode. The clothes are agitated by the forward and reverse rotation of the agitating blade 8a, and the dirt is removed. Washing is performed for a predetermined time and the washing operation is terminated.

Step S506
Run drainage. The drain valve 14 is opened, and the wash water in the outer tub 9 is drained.

Step S507
Perform fast dehydration 1. The clutch mechanism 10b is set to the dewatering mode, the motor 10a is energized, and the washing and dewatering tank 8 and the stirring blade 8a are integrally rotated at a high speed. Water containing detergent contained in the laundry due to centrifugal force accompanying high-speed rotation is discharged to the outer tub 9 from the through hole 8b provided in the washing and dewatering tub 8, passes through the washing water drainage path 15, and the washing machine 1 Drained outside the machine. In the high speed dehydration 1, the rotation speed of the motor 10a is increased stepwise. This is because, in the initial stage of dehydration, a large amount of water containing the detergent is discharged from the laundry, exceeds the drainage speed, accumulates too much in the outer tub 9, and is foamed and foamed by the rotation of the washing and dehydrating tub 8. Is to prevent.

  The laundry after the water contained in the laundry is sufficiently dehydrated (dehydration rate is about 55 to 60%) is in a state of being pressed against the inner wall surface of the washing and dehydrating tub 8.

Step S508
The high-speed dehydration 1 does not stop the rotation of the washing / dehydrating tub 8 from stopping at high speed, the speed is reduced to about 35 r / min, the water supply electromagnetic valve in the tub is opened, and the washing / dehydration tub 8 is washed. Rotating showers to spray rinsing water on the objects are carried out for a specified time.

  In general, the higher the rotational speed of the washing and dewatering tub 8 in the rotary shower rinsing, the greater the rinsing effect. However, in actual operation, if the water is rotating at high speed, the sprayed water will be bounced by the unevenness on the surface of the laundry or may be dehydrated through only a part of the laundry. It is difficult for rinsing water to penetrate and it is difficult to obtain a sufficient rinsing effect. Therefore, in order to efficiently impregnate the laundry with the rinse water, it is desirable that the rotation speed of the washing and dewatering tub 8 is set to a low rotation speed (for example, 35 to 130 r / min) at which primary resonance does not occur. At this rotational speed, even if the laundry is deviated in the washing / dehydrating tub 8, the washing / dehydrating tub 8 does not shake greatly, and the process of interrupting dehydration due to excessive vibration is not performed. A rotary shower is executed for a predetermined time, and the shower rinsing operation is terminated.

Step S509
Fast dehydration 2 is performed. From step S508, the number of rotations is increased without stopping the washing and dewatering tank 8, and the water contained in the laundry is dehydrated by rotating at high speed. When the specified time has elapsed, the energization of the motor 10a is stopped, and the rotation of the washing and dewatering tub 8 is stopped.

Step S510
The drain valve 14 is closed, the in-tank water supply electromagnetic valve is opened, and rinse water necessary for rinsing is supplied to the outer tub 9 and the washing / dehydrating tub 8.

Step S511
The clutch mechanism 10b is set to the agitation mode, and the motor 10a is energized to rotate the rotating blades 8a forward and backward so as to agitate the laundry. At this time, the finishing agent water supply electromagnetic valve is opened to supply water to the detergent / finishing agent charging device 11, and the finishing agent put into the finishing agent chamber of the detergent / finishing agent charging device 11 is washed and dewatered together with water. 8 in. Rinsing is executed for a specified time, and the rinsing operation is terminated.

Step S512
Run drainage. The drain valve 14 is opened, and the rinse water in the outer tub 9 is drained. In the case of drainage, in order to stabilize the start-up at the time of dehydration, the final dehydration in step S513 may be performed in a state where a certain amount of rinse water remains.

Step S513
The clutch mechanism 10b is set to the dewatering mode, the motor 10a is energized, and the final dewatering is executed. The washing / dehydrating tub 8 is rotated at a high speed to dehydrate water contained in the laundry. When the specified time has elapsed, the rotation of the washing and dewatering tub 8 is stopped and the dehydration operation is terminated.

Step S514
Run the loosening. The laundry after the dehydration operation is in a state of being pressed against the inner wall surface of the washing and dewatering tub 8. When the laundry is finished as it is, it is necessary to loosen the attached clothes to take out the clothes. Further, when the clothes are taken out after being dehydrated and the clothes are taken out after a lapse of time, the wrinkles become tight because they are left on the inner wall surface of the washing and dehydrating tank 8. Therefore, unwinding after dehydration makes it easy to take out the clothes, and even if the clothes are not taken out immediately and left in the tub, the wrinkles are reduced compared to the case where the clothes are stuck to the inner wall surface of the washing / dehydrating tub 8. effective.

  Here, the details of the unwinding operation will be described. The clutch mechanism 10b is set to the agitation mode, and the motor 10a is energized to rotate the rotating blade 8a forward and backward. After the final dehydration, the laundry pressed against the inner wall surface of the washing / dehydrating tub 8 is pulled off from the inner wall surface of the washing / dehydrating tub 8 by hooking it with the stirring rib of the rotary blade 8a, and the cloth is loosened. Make it easy to remove. At this time, at the beginning of the loosening operation, the rotational speed of the rotary blade 8a is set slower than that during the easy stirring, so that the laundry is reliably caught without slipping or rubbing between the stirring rib and the laundry. The laundry can be peeled off while suppressing the damage to the laundry. Further, excessive torque does not act on the drive device 10, and the generation of abnormal noise can be prevented.

  At this time, the on / off time, the number of rotations, and the number of forward / reverse operations in the forward / reverse operation of the stirring blade 8a are the amount of laundry, the diameter of the stirring blade 8a, the shape of the stirring rib, It depends on the shape of the wall. For example, when the amount of laundry is small, the number of rotations is lowered and the number of forward / reverse operations is reduced. The on-off time is set to 0.4 to 1.5 seconds and the off time is set to 0.4 to 3.0 seconds, for example, depending on the amount of laundry. Also, several patterns of on-off time periods may be combined, and the cloth can be loosened more efficiently.

  The unwinding operation is executed for a predetermined time, and the unwinding is finished.

Step S515
Check if hot air unwinding operation is set and branch processing. If the hot air unwinding operation is set, step S516 is executed, and if not, the washing course is ended.

Step S516
Perform warm air agitation. The clutch mechanism 10b is set to the stirring mode, the motor 10a is energized, the clothes are agitated while rotating the rotary blade 8a forward and backward, and the fan 21 and the heater 22 are energized at the same time. Warm the warm air and warm the laundry. The warm air that warms the laundry returns to the fan 21 through the drying duct 20, circulates so as to be heated again by the heater 22 and blown into the washing and dewatering tub 8.

  In a normal drying operation, cooling water is flowed in order to prevent dehumidification in the drying duct 20 and deformation of parts due to temperature rise. However, in the hot air stirring operation, it is better not to flow cooling water in order to raise the temperature of the circulating air, the washing / dehydrating tub 8 and the laundry in a short time. The hot air stirring operation is basically executed according to a predetermined time schedule set in advance, and the washing course is completed.

  The effect and desirable stirring operation of the hot air stirring process will be described in detail. The purpose of the warm air agitating operation is to warm the clothes evenly in a short time and to prevent dehydration and wrinkling of the clothes. Accordingly, the clothes can be warmed evenly by stirring so that the warm air is uniformly applied to the clothes after loosening in step S514. In addition, the wrinkles become stronger as they are left in the same folded shape for a longer time. For this reason, in order to reduce wrinkles, it is better to change the shape from moment to moment and to continue stirring so as not to keep the same part folded. Stiffness is improved by rubbing clothes, but for this purpose, stirring of clothes is important. However, in the case of a vertical washer, clothes are agitated by the rotary blade 8a. However, if the agitation is too strong or the agitation time is too long, loosened clothes are entangled again, making it difficult to improve wrinkles. .

  FIG. 7 qualitatively illustrates the influence of the strength of stirring (the number of revolutions of the stirring blade 8a and the on-time) on the time of warm air stirring, which affects the temperature unevenness and the finish of clothing.

  As shown in FIG. 7A, the fabric entanglement tends to increase as the agitation is increased (the number of revolutions of the agitating blade 8a is high and the on-time is long). In particular, if the number of revolutions of the stirring blade 8a is too high or the ON time is too long, the fabric entanglement increases rapidly.

  FIG. 7B shows the temperature unevenness of the clothing. When the agitation is weak, there is little change in the cloth, and the temperature unevenness increases because there is clothing that does not hit the warm air and clothing that does not. Increasing the intensity of stirring increases the change of clothes and reduces temperature unevenness. However, if the stirring is too strong, the fabric entanglement increases as shown in FIG. Warm air does not hit the part inside, and temperature unevenness increases.

  FIG. 7C shows the finish. If the stirring is weak, the movement of the garment is small, and the garment is easy to keep its shape with dehydrated wrinkles. Moreover, since there is little change of clothing, the lower clothing is crushed by the upper clothing and wrinkles. When the strength of stirring is increased, the fabric entanglement gradually increases as shown in FIG. 7A, but the effect of increasing the cloth movement and increasing the frequency of clothing shape change is greater. Dehydration wrinkles will decrease. However, if the agitation is too strong, the clothes will be intertwined, and the clothes will be wrinkled, resulting in poor finish. Thus, if the stirring is weak, the wrinkles attached at the beginning cannot be removed, and if the stirring is too strong, wrinkles due to entanglement increase.

  The strength of the agitation is determined by the allowable temperature unevenness of the cloth and the finish of the clothing. For example, in FIGS. 7B and 7C, when the temperature unevenness and the allowable value of wrinkles are broken lines, the appropriate range of the strength of stirring is a filled range in the figure. What is necessary is just to take the intensity | strength of stirring the range which overlapped in both ranges. In the present embodiment, the rotation speed of the stirring blade 8a is 100 to 130 r / min, the on time is 5 seconds, and the off time is 2 seconds. Needless to say, the strength of the agitation needs to be determined in accordance with the shape of the agitating blade 8 a and the shape of the inner wall surface of the washing and dewatering tub 8. In addition, when the temperature unevenness and the allowable range of wrinkles do not overlap, the strength of stirring is determined depending on which temperature unevenness or wrinkle (finish) is given priority.

  The main purpose of applying warm air to clothing while stirring warm air is to warm the clothing, but it also has the following effects. According to the literature (Abstracts of the 19th Annual Meeting of the Japan Society of Home Economics (1967) B-20, the behavior of wrinkles during machine washing, Kyoto Women's University Masao Kitada), the water temperature during washing and agitation is 25 ° C to 40 ° C. However, the degree of wrinkle removal is large. This is also true for clothing containing moisture after dehydration. Therefore, wrinkles can be removed more effectively than by stirring at normal temperature by applying warm air to clothing in the warm air stirring step. Furthermore, since the change of clothes and cloth movement are good, there is also an effect of reducing the stiffness due to the garment.

  Moreover, it is better to optimize the operation time and operation details of final dehydration (step S513), unraveling (step S514), and hot air stirring (step S516) according to the amount of cloth and the water temperature. For example, the loosening time and the warm air stirring time may be lengthened as the amount of cloth increases, and the warm air stirring time may be lengthened as the water temperature and room temperature are low.

FIG. 8 shows the setting time of the final dehydration process, the unraveling process, and the warm air stirring process according to the load amount and the water temperature when a 1000 W heater is used for hot air stirring and a warm air of about 1 m ³ / min is blown. It is an example.

  FIG. 8A is an example of the final dewatering time, the loosening time, and the hot air stirring time depending on the amount of cloth. The larger the amount of cloth, the longer the dehydration time, the loosening time, and the warm air stirring time. By doing so, it is possible to suppress the dehydration rate, looseness, and temperature rise of the clothing within a certain range. In this example, the temperature rise value of the clothes can be about 8 to 10 ° C. regardless of the amount of cloth.

  FIG. 8B is an example of the final dehydration time, the unwinding time, and the hot air stirring time depending on the water temperature. The lower the water temperature, the higher the surface tension and viscosity coefficient of water, so the dehydration rate decreases. Therefore, the final dehydration time is set longer as the water temperature is lower, and the dehydration degree of the clothes is made substantially the same regardless of the water temperature. And the warm air stirring time is lengthened, so that water temperature is low. By carrying out like this, the temperature rise value of clothing can be made into about 8-10 degreeC irrespective of water temperature.

  FIG. 8C is an example of the final dehydration conditions based on the amount of cloth and the water temperature, the loosening time, and the warm air stirring time. In order to make the dewatering rate substantially the same regardless of the amount of cloth and the water temperature, the final dewatering time and the final dewatering speed are increased as the cloth amount increases and the water temperature decreases.

  In the above, the time for final dehydration and warm air stirring is controlled based on the water temperature at the time of washing detected by the temperature sensor 26b, but it may be controlled according to the room temperature of the room in which the washing / drying machine is installed.

  FIG. 9 shows the temperature of clothing when the warm air stirring of this embodiment is performed under the same experimental conditions as in FIG. 4 (cloth amount 2.0 kg (mixed real clothing of cotton and synthetic fiber), water temperature 20 ± 2 ° C.). is there. The maximum temperature of the nine clothes was 26.0 to 29.0 ° C. (temperature unevenness 3.0 ° C.), and the average maximum temperature was 27.8 ° C. (average temperature increase 9.8 ° C.). Compared to the case of applying warm air during conventional dehydration (Case A) or unraveling (Case B), the temperature unevenness was remarkably reduced and the temperature rise was also high. In addition, the wrinkles of the clothing were reduced to such a degree that they could be visually observed, and the feel was the softest with respect to wrinkles. Thus, the effect which performs a warm air stirring operation after the unwinding operation | movement of this invention has been confirmed.

  Next, the effect of executing the warm air stirring step after the end of the loosening step will be described. Even in the loosening process, the clothes are being agitated, and even if hot air is applied to the clothes during the loosening process, the same effect as described above is likely to be produced. However, in the loosening step, the clothes stuck in a cylindrical shape on the inner wall surface of the washing and dewatering tank 8 are peeled off in the final dehydration, and then the clothes are dispersed almost uniformly in the washing and dewatering tank 8. For this reason, since the optimum on-off time of the stirring blade 8a is set, it is not the optimum time for changing clothes or cloth movement. Therefore, even if warm air is blown on the clothing in the loosening step, the temperature of the clothing located in the upper part of the washing and dewatering tub 8 is increased, but the temperature of the clothing located in the lower part does not rise so much and temperature unevenness occurs. Further, since the cloth movement is insufficient, the wrinkles cannot be sufficiently reduced, and the warm air is blown only on the clothing on the upper part, so that the wrinkles may be fixed. Therefore, in the unraveling process, the clothes are thoroughly unraveled, and in the subsequent warm air stirring process, the clothes are replaced and the cloth moves in an on-off time period with good operation. The reduction effect can also be increased.

  In a normal drying operation using the heater 22 and the fan 21, the end of the drying is detected so that the clothes, the inner lid 9a, and the washing / dehydrating tub 8 are hot at the end of drying so as not to get burned when the clothes are taken out. After that, the air blowing operation for cooling is performed, and the outer lid 3 is not opened by the lid lock mechanism during this time. On the other hand, the warm air stirring operation is a short time (3 to 7 minutes in the present embodiment), and the clothing temperature is around 30 ° C., so the lock mechanism of the outer lid 3 is released at the same time as the operation is completed, To be able to take out clothes. Similarly, when the temporary stop switch is pushed during the hot air stirring operation, the lock mechanism of the outer lid 3 is immediately released so that the clothes can be taken out. This is to make it possible to take out the warm-warmed clothing before cooling. Furthermore, when the warm air agitation is finished, if wrinkles are reduced and the warmed clothing is left as it is, wrinkles will increase again, or stiffness will increase, preventing the effect of the hot air agitation from being reduced. It is also for the purpose.

  As described above, as the washing machine according to the present embodiment, the vertical washing and drying machine in which the rotation axis of the washing and dewatering tub 8 is substantially vertical has been described. A drum-type washing and drying machine in which the rotation axis of the water tank 8) is substantially horizontal may be used.

  In the case of the drum type, there is a concern that clothing will stick to the drum wall surface during dehydration. This is because the clothes can be peeled off by fixing the washing and dewatering tank and rotating the rotor blades in the vertical type, but in the drum type, the means for peeling the clothes is only gravity. The sticking of clothing during dehydration is due to centrifugal force during dehydration. When the drum rotation speed is increased from the water content after rinsing and draining to the dehydration rotation, centrifugal force acts on heavy clothing containing water, and the clothing becomes tight, especially in the case of cotton clothing. Becomes very difficult.

  At the time of normal dehydration, the number of revolutions of the drum is increased to a prescribed number of revolutions as shown in FIG. If it carries out like this, the loosening operation | movement after spin-drying | dehydration will become very difficult for the reason mentioned above. Therefore, as shown in FIG. 10 (B), the drum rotation speed is gradually increased into a, b, and c, and the drum rotation is temporarily stopped, and the drum is rotated at a low speed and with a short cycle. By rotating in the left and right direction, the clothes are peeled off from the drum by the weight of the clothes themselves, and the clothes peeling operation is executed. By carrying out like this, by shifting to the step of high rotation speed in the state which reduced the moisture content of clothes, the sticking condition of clothes by centrifugal force can be reduced, and clothes can be easily peeled off after completion of dehydration.

  After the final dehydration, the unwinding operation and the warm air stirring operation are performed in the same manner as in the vertical washer-dryer. The unraveling operation is performed by rotating the drum to the left and right for a short time in the same manner as the clothes peeling operation. The unwinding operation time should be longer as the amount of cloth is smaller. This is because, as described above, gravity is used to peel the garment from the drum, so that the larger the amount of garment, the easier it is to peel off. After loosening, warm air agitation is performed. The drum is turned to the left and right in a slightly longer cycle and heated with warm air while changing clothes. Of course, the hot air stirring time is set according to the water temperature and the amount of cloth. By doing so, as with the vertical type, the effect of warming clothes, reducing dewatering wrinkles, and reducing wrinkles can be obtained.

  In addition, as a pressure type that rotates the fan at high speed, by reducing the area of the hot air outlet and increasing the speed of the hot air to be blown, the wrinkles of the clothes can be stretched by the wind pressure of the wind, further dewatering wrinkles Can be reduced.

  The operation at the time of final dehydration shown in FIG. 10B may be performed by a vertical washing dryer. When the loosening operation is performed by the vertical washing dryer, the load acting on the stirring blade 8a is increased as the amount of cloth increases, so that the clothes attached to the inner wall surface of the washing and dewatering tub 8 are peeled off by the rotation of the stirring blade 8a. The torque becomes larger than the load torque acting on the stirring blade 8a during normal washing or drying. If the capacity of the driving device 10 is adjusted to the load torque at the time of loosening, the cost of the washing / drying machine is increased. Therefore, when the amount of cloth is large (for example, when the washing capacity is 10 kg, the amount of cloth is 6 kg or more), the rotation is temporarily stopped at a stage where the dewatering rotation speed is low, and the loosening operation similar to step S514 is executed. In this case, it is not necessary to loosen the clothes until they are uniformly arranged in the washing / dehydrating tank 8, and it is sufficient to loosen the clothes to such an extent that the clothes are peeled off from the inner wall surface of the washing / dehydrating tank 8. By doing so, there is little movement of the clothes in the washing and dewatering tub 8, and it is difficult to become unbalanced when the dehydration rotational speed is increased again, and it is possible to prevent an increase in vibration and noise during dehydration. What is necessary is just to set the frequency | count of the loosening operation | movement in a spin-drying | dehydrating process according to the allowable torque of the drive device 10 of a washing dryer. In this way, even in the vertical washer / dryer, the clothes can be loosened regardless of the amount of cloth, and the cost of the drive device 10 can be prevented from being increased.

  In addition to the operation of adding warm air stirring to the end of the washing course as the “warm air unwinding” operation, a “warm air unwinding” course may be provided so that the warm air stirring can be operated independently. This is because the dehydrated clothing is put into the washing and dewatering tub 8 and then the “warm air unraveling” switch is selected and the start switch is pressed to perform the warm air stirring (step S516) in FIG. 6 for a short time. It is to make. The normal washing course is completed and the clothes are dried. At this time, if there is clothes for which dehydration wrinkles are to be reduced, the clothes are put in and warm air stirring is performed. Since the warm air agitation can be performed with a small amount of clothing, the probability of entanglement with other laundry is reduced, and the finish with less wrinkles can be realized, and the labor of ironing after drying can be saved labor by drying the room and outside. it can. Moreover, although the washing | cleaning was complete | finished by selecting the above-mentioned warm air unwinding driving | operation, since cloth | dough is thick, it can utilize also when warming a little with warm air is desired. In addition, since the state of the thrown-in clothing cannot be detected, the loosening operation in step S514 may be performed before the hot air stirring.

  Although the heater type has been described as an example of the heat source for drying, a heat pump type may be used. Since the heat pump type can perform heating (condenser) and dehumidification (heat radiator) at the same time, a water-cooled dehumidification mechanism is unnecessary. The heat pump type requires more time to establish a heat pump cycle than the heater type, and the temperature rise of the hot air is slow. Therefore, it is preferable to start the operation of the compressor of the heat pump and increase the temperature of the condenser without rotating the fan during the final dehydration or unraveling process before the hot air stirring process. By carrying out like this, a warm air can be sprayed on the clothing in a washing and dehydrating tank from the start of a warm air stirring process.

DESCRIPTION OF SYMBOLS 1 Washing dryer 2 Case 3 Outer lid 4 Water supply hose connection port 5 Water absorption hose connection port 7 Operation display panel 8 Washing / dehydration tank 8a Rotary blade 8b Through hole 9 Outer tank 9a Inner lid 9b Tank cover 9c Drop part 9d Bottom wall Part 9e Peripheral wall (peripheral wall surface)
10. Drive device (drive means)
10a Motor 10b Clutch mechanism 10c Rotating shaft 11 Detergent / finishing agent charging device 12 Water supply unit 13 Lower communication pipe 14 Drain valve 15 Washing water drain 17 Circulation pump 20 Drying duct 22 Heater 25 Water level sensors 26a, 26b, 26c Temperature sensor (temperature) Detection means)
27 Acceleration sensor 28 Rotation sensor 29 Motor current sensor 100 Control device (operation control means)

Claims (3)

A housing,
Anti-vibration support in the housing, and an outer tub for storing washing water inside,
A washing and dehydrating tub that is rotatably supported in the outer tub and in which the laundry is stored,
A driving device for rotationally driving the washing and dewatering tub;
A drying means for blowing warm air into the washing and dewatering tank,
In a washing and drying machine provided with a control means for controlling the execution of each step of washing, rinsing, dehydration and drying,
The control means, after the final dehydration step, drives the driving device to perform the unraveling step of removing the laundry stuck to the washing and dewatering tub and reducing the entanglement of the laundry, after the unraveling step, A washing / drying machine that performs a warm air stirring process for operating the drying means while driving the driving device and stirring the laundry. Having cloth amount detecting means for detecting the amount of laundry;
The control means controls the time of the final dehydration process, the loosening process, the warm air stirring process, and the rotational speed of the driving device in accordance with the amount of laundry detected by the cloth amount detection means. The washing / drying machine according to claim 1, wherein: A water temperature detecting means for detecting the water temperature in the outer tub, or a room temperature detecting means for installing the washing and drying machine;
The control means includes the time of the last dehydration process, the loosening process, the warm air stirring process, and the water temperature detected by the water temperature detection means during washing or the room temperature detected by the room temperature detection means. 2. The washing / drying machine according to claim 1, wherein the washing / drying machine is controlled accordingly.

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