JP5478578B2 - Washing and drying machine - Google Patents

Description

  The present invention relates to a washing and drying machine provided with means for drying clothes.

  Drying clothes using a dryer or a washing and drying machine that can perform washing to drying continuously creates high-temperature and low-humidity air with a blower fan and heat source, and blows it into the washing tub to raise the temperature of the clothes. This is done by evaporating moisture from the clothing and discharging the evaporated moisture out of the machine. There are two methods for removing the evaporated water: an exhaust system that discharges it directly outside the washing and drying machine (always supplying new air) and a dehumidification system that cools the evaporated water and condenses it to remove the water (circulates the same air). .

  As a technique related to the former, there is Patent Document 1 below. In Patent Document 1, following the end of the drying operation by hot air, the cooling operation by the blowing of the blowing means is executed, and the exhaust valve of the air discharging means is opened to discharge the air in the sealed space to the outside. Is described.

  As a technique relating to the latter, in Patent Document 2 below, when forced drying is performed, the blower, the heater, and the dehumidifier are operated when the exhaust duct is closed, and when the remaining heat is dried, the exhaust duct is switched from the closed state to the open state. It is described that the heater is switched from the operation state to the operation stop state.

  Japanese Patent Application Laid-Open No. H10-228561 describes that there is means for directly discharging the reflux air to the outside of the dryer without passing through a heat exchanger, and sucking fresh air into the drum.

On the other hand, in drying, good finish due to the small number of wrinkles of clothing at the end of drying is also required. As a technique related to this, there is Patent Document 4 below. This Patent Document 4 describes that the air volume is 0.8 m ³ / min or more, and the wind speed is set according to the air volume.

  Furthermore, there is the following Patent Document 5 as a technique related to air volume control. This publication describes that the rotation speed of a fan-driven electric motor is controlled to effectively control and supply the optimum hot air flow rate and temperature with precision corresponding to each of the three drying periods.

  Moreover, there is the following Patent Document 6 as a technique capable of selecting an operation of air drying without inputting a heater. This patent document 6 has a cover opening / closing means for allowing a part of a circulating air passage on the upstream side of the heater to be connected to the outside of the machine body or closing it, and by cold air that does not energize the heater with the opening / closing means open. It is described that a wind drying operation is provided.

JP 2008-104715 A JP 2008-110135 A Japanese Utility Model Publication No. 3-128094 JP 2009-72500 A JP 62-44299 A JP 2011-11079 A

  However, with the conventional technology that exhausts the warm air after being blown onto the laundry as it is, it is possible to reduce the time and reduce the amount of water used and power consumption. The air is exhausted as it is, and the indoor environment is deteriorated. In addition, since warm air is used, variations in the dryness of individual clothes occur due to the unevenness of the contact between the warm air and the clothes, and so-called dry unevenness occurs. Recently, due to diversification of life and power saving demands from the power supply side, there is a strong desire to save power by reducing the amount of power consumption rather than shortening the drying time and further reducing the peak value of power consumption during operation as much as possible. On the other hand, there is a case where importance is attached to balance with the shortening of the drying time as before, but the conventional technology that can arbitrarily select the use / nonuse of the heater is intended for clothes dryers, The purpose is to reduce the shrinkage and the damage. For this reason, there is no mention of any means or technique for reducing the power consumption other than the non-use of the heater. Therefore, there is no home-use laundry dryer and its technology that can cope with both operation that desires shortening of drying time and operation that desires reduction of power consumption. In other words, even in the former driving, from the viewpoint of ease of use, it is desired that the driving time be reduced as much as possible.

  On the other hand, in the conventional technology that configures the warm air speed and air volume that emphasizes only the finish, wrinkles can be reduced, but no consideration is given to reducing the power consumption of drying.

  Accordingly, an object of the present invention is to provide a washing / drying machine that can select either a drying operation that emphasizes time reduction or power consumption.

  Buttons etc. to allow the user to arbitrarily select normal drying operation that uses heating means and power-saving drying operation that mainly does not use heating means in a washing / drying course from washing to drying or drying only course Setting means are provided. Furthermore, at least one of the following features is provided. In the case of a series of washing and drying operations, it is assumed that the upper limit setting of the final dewatering rotation speed is increased as much as possible for each load rank than in the normal drying operation. The final dehydration time is set longer than that in the normal drying operation. The acceleration up to the set number of rotations of the air blowing means at the start of drying is not limited by the combined use of the heating means, and thus is quickly started up within a range that does not damage the equipment. In addition, the following features are provided as necessary. When the air pressurized by the blowing means is blown into the drum, it is applied to the clothing as a high-speed wind having a blowing speed of 48 m / s or more. The basic operation pattern of drying is to circulate the same air in the drum and the air duct, and the atmosphere in or through the housing is taken into the air intake of the air blowing means, and the same amount of air is passed through the drainage hose. It is comprised from the ventilation exhaust process exhausted.

  According to the present invention, it is possible to select a drying operation in which power saving is important or drying time reduction is important. In addition, when the former is selected, efficient drying can be achieved by the balance between the use of heat accompanying pressure increase and the heat transfer performance by increasing the speed of blown air into the drum, so that the power consumption required for drying can be reduced. Further, since a separate heat source is not used for raising the temperature of the blown air, the peak of power consumption is not generated in the drying process, and there is no part that becomes high temperature. Therefore, safety during operation can be ensured. Furthermore, since the temperature level of the blown air is relatively low, it is difficult for temperature differences between clothes to occur, and uneven drying of clothes can be reduced. Further, if the blowing air speed to the drum is secured at a desired value or more, wrinkles can be reduced and the finish can be improved.

1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention. Sectional drawing of the washing-drying machine at the time of circulation of the first half of the drying process according to the first embodiment of the present invention is shown. FIG. 3 is a perspective view showing the internal structure according to the first embodiment of the present invention, partially cut away from the circulating air flow in the first half of the drying process. Sectional drawing of the washing-drying machine at the time of the ventilation exhaust_gas | exhaustion of the latter half of a drying process which concerns on 1st Example of this invention is shown. The operation pattern of the drying process according to the first embodiment of the present invention is shown. This relates to the first embodiment of the present invention and shows the difference in dryness distribution from the conventional method. An example according to the first embodiment of the present invention, showing an example of a dry finish with respect to a difference in wind speed v (m / s). The block diagram of the control apparatus of a washing / drying machine according to the first embodiment of the present invention is shown. The flowchart of the control processing program of a washing / drying machine according to the first embodiment of the present invention is shown. The upper limit value table of the dehydration rotation speed according to the 1st Example of this invention according to a load level is shown. FIG. 5 shows a specified temperature table at the end of drying according to the load level according to the first embodiment of the present invention. This relates to the first embodiment of the present invention, and shows a comparison of the amount of drying power and the drying time with and without heater heating. It is a perspective view which shows the internal structure by cutting partially according to the second embodiment of the present invention. The enlarged view of the blowing nozzle part which concerns on the 3rd Example of this invention is shown.

  Hereinafter, examples will be described with reference to the drawings.

  FIG. 1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention. On the upper part of the base 1, an outer frame 2 composed of a steel plate and a resin molded product is placed. The front side of the outer frame 2 is provided with a door 3 for loading and unloading the laundry 30, a front cover 22 and a back cover 23 on the back.

  FIG. 2 relates to the first embodiment of the present invention. The air that has been pressurized by the fan 49 is blown to the rotating drum 29 that is the inner tub to evaporate moisture from the laundry 30 that is the object to be dried. Washing and drying machine at the time of a circulation drying process in which heat is exchanged with the outer tub 20 and the air duct 40 while the air containing the air passes through the outer tub 20 and the air duct 40 to dehumidify by condensing a part of the steam. FIG. FIG. 3 is a perspective view of the air flow at the time of the circulation drying process indicated by arrows in the case where a part of the casing is cut to show the internal structure. The air pressurized by the fan 49 is blown into the rotary drum 29 through the nozzle portion.

  First, the schematic structure of the washing / drying machine and the washing / dehydrating process will be briefly described. An outer tub 20 is provided inside the outer frame 2. The outer tub 20 is supported by a plurality of lower suspensions 21. The rotating drum 29 inside the outer tub 20 has the laundry 30 put in with the door 3 opened, and the outer periphery of the opening of the rotating drum 29 reduces vibration due to unbalance of the laundry 30 during dehydration. A fluid balancer 31 is provided. A plurality of lifters 33 for lifting the laundry 30 are provided inside the rotary drum 29. The rotating drum 29 is directly connected to a drum driving motor 36 via a main shaft 35 connected to a rotating drum metal flange 34. A rubber packing 38 made of an elastic body is attached to the opening of the outer tub 20. The packing 38 serves to maintain the watertightness between the outer tub 20 and the door 3. This prevents water leakage during washing, rinsing and dehydration. The rotating drum 29 has a large number of small holes (not shown) for centrifugal dehydration and ventilation on the side wall. A drain port 37 opened in the bottom wall of the outer tub 20 is connected to the drain hose 9 via the drain valve 8. The overflow hose 17 is attached to the blower duct 40 on the rear surface of the drum, and is joined with the hose from the drainage port 37 before the drainage valve 8. That is, when the drain valve 8 is opened, the drain hose 9 is communicated.

  The drying device 6 includes a blower duct 5 that guides the blown air to the laundry 30 in the rotary drum 29, a fan 49, and a blowout nozzle 11 as a blowing unit, and a heater 50 as a heating unit. The drying device 6 is fixed to the outer frame 2 apart from the outer tub 20 (not shown). The outlet of the heater 50 and the blowout nozzle 11 are connected to the outer tub 20 approximately perpendicularly to the outer tub 20 by a flexible bellows 7 between the uppermost surface and the center of the outer tub 20 and in front of the center of the outer tub 20. The vibration of the tank 20 is absorbed. Temperature sensors (not shown) are provided at the suction port and the discharge port of the drain hole 37 and the fan 49. However, the heater 50 which is the heating means of this embodiment is used during another operation, and in this embodiment, no heater is used.

  The drum type washing and drying machine configured as described above rotates in the washing process by putting the laundry 30 into the rotary drum 29, supplying water with the drain valve 8 closed, and storing the washing water in the outer tub 20. The drum 29 is rotated to wash the laundry 30. In the case of a drum-type washing / drying machine, as the drum rotates, the laundry 30 lifts the laundry 30 to the top of the drum by the lifter 33, and then drops onto the bottom of the drum by gravity. Since the overflow hose 17 is connected to the air duct 40, the washing water may flow to the position of the overflow hose 17 in the air duct 40 in some cases. Moreover, in order to wash away the lint in the air duct 40 during the washing process, water may be injected into the air duct 40 from a water injection tool (not shown) provided on the air duct 40. Since the bellows hose 52 and the outer tub side mounting portion 53 that connect the rear surface of the outer tub 20 and the bottom of the air duct 40 are inclined downward from the air duct 40 toward the rear surface of the outer tub, At the end, the water is quickly drained from the outer tub 20 through the drain port.

  In the dehydration step, the drain valve 8 is opened to drain the washing water in the outer tub 20, and then the rotary drum 29 is rotated to perform centrifugal dehydration. Even if a part of the dehydrated water is wound up to the air duct 40 side, the bellows hose 52 and the outer tank side mounting portion 53 that connect the back surface portion of the outer tub 20 and the bottom portion of the air duct 40 are connected from the air duct 40 to the back surface portion of the outer tub 20 Since it has a downward slope toward the surface, it can be quickly returned to the outer tank side. When the rotational speed of the rotating drum 29 is increased by increasing the dehydration rotational speed, vibration is transmitted to the outer tub 20 and the outer tub 20 itself vibrates slightly. Since the air duct 40 is fixed to the housing, the bellows hose 52 that connects the back surface of the outer tub 20 and the bottom of the air duct 40 is interlocked to absorb part of the vibration.

  In the first half of the drying process, as shown in FIG. 2, air heated by adiabatic compression by the fan 49 is blown into the rotary drum 29 through the blowing nozzle 11 to exchange heat with the laundry 30 and from the laundry 30. Evaporate moisture. The air containing the evaporated water and having become highly humid is led to the fan suction port through the blower duct 40, and after the pressure is increased again, the air is blown into the rotary drum 29. The intake valve 13 forms a part of the wall surface of the air duct 40 and is in a fully closed state in which the inside and the outside of the air duct 40 are isolated. In this embodiment, since the pressure increase by the fan 49 is about 6000 Pa, if the compression process is adiabatic compression, the temperature increase is about 5 ° C. In addition, air is also warmed by heat transfer from the fan motor 51 that drives the fan 49 during the compression through a shaft (not shown), and the air rises by about 9 ° C. in total. When the humid air at the outlet of the rotary drum 29 passes through the outer tub 20 and the air duct 40, the outer tub 20 and the air duct 40 also exchange heat with each other, so that moisture corresponding to a decrease in the saturated vapor pressure is removed from the outer tub. 20 and the wall surface of the air duct 40 are condensed. Moisture condensed in the air duct eventually accumulates in the bellows hose 52 from the bottom of the duct, but since it is inclined downward from the air duct 40 toward the back of the outer tank 20, the condensed water also passes through the outer tank 20. It can be transferred to the vicinity of the drain outlet.

  In the latter half of the drying process, the intake valve 13 and the drain valve 8 are opened. FIG. 4 shows the air flow in the washing and drying machine in the latter half of the drying process. The intake valve 13 on the suction side of the fan 49 is opened so as to be bent inside the air duct 40 (in the air passage). In this embodiment, the opening degree θ is substantially half open (0 <θ <θT) with respect to the fully open state θT that is open so as to block the air passage of the air duct 40 (ignoring the leakage level). Air inside the casing outside the air duct 40 is sucked, mixed with a part of the circulating air, and blown into the rotating drum 29. The air pushed out from the rotary drum 29 passes through the drain hose 9 from the drain port 37 and is discharged to the drain hole 39. In the case of a general drain trap, the water seal height is about 50 to 80 mm. Therefore, at the beginning of this process, the intake valve is fully opened, the pressure in the drum is increased, and the water seal is broken. In order to break the water seal, the pressure on the drainage hose 9 side needs to be about 1000 Pa or more. Also, as drying progresses, condensed water is generated and collected in the drain trap. For this reason, the operation | movement which breaks the said water seal is performed at fixed intervals.

  The exhaust from the rotary drum 29 is exhausted through the connection hose from the drain port 37 to the drain valve 8 and the overflow hose 17. On the other hand, since the intake air led mainly into the housing from the bottom of the housing passes through the periphery of the rotary drum driving motor 36 and the fan motor 51 between the air supply holes 18 at the top of the housing, the temperature becomes high. Then, the air is taken from the air supply valve 13 into the air passage. For this reason, normally, the heater 50 provided at the outlet of the fan 49 does not need to be energized. An exhaust path for exhausting from the drain valve through the overflow hose 17 from the rotating drum 29 includes an outer tank side mounting portion 53 and a bellows hose 52 on the rear surface of the outer tank 20. Therefore, the inflow angle of the exhaust gas into the air blowing duct 40 becomes an obtuse angle larger than 90 degrees, and the air path loss in the exhaust path can be reduced.

  FIG. 5 schematically shows the operation pattern of the drying process in this embodiment, the fan outlet air sent to the rotary drum 29, and the change in the fan inlet air temperature where the intake air and a part of the drum outlet air are mixed. is there. In the first half of the drying process, air is circulated between the rotating drum 29 and the air duct 40 by the fan 49. The circulating air temperature rises due to the pressure increase of the fan. At the same time, the hot air exchanges heat with the clothes in the rotating drum and contains moisture evaporated by a part of the heat, thereby becoming high humidity. The humid air is returned from the rotary drum 29 to the fan suction via the outer tub and the air duct 40. At this time, when it becomes below a dew point by cooling by an outer tank or an air duct, it will condense and dehumidify on an inner wall of an outer tank and an air duct. Thereby, the temperature of the outer tub and the air duct gradually increases with the circulating air, and heat can be stored in the circulation system. In the second half of the drying process, the intake valve 13 on the suction side of the fan 49 is opened to suck the air in the housing outside the air duct 40 and mix it with a part of the circulating air, and then into the rotating drum 29 by the fan 49. Blow. That is, in this process, the air in the housing warmed by the exhaust heat of the fan motor 51 and the rotary drum driving motor 36 is taken into the circulating air and sent to the rotary drum as hot air with adiabatic compression of the fan. The same amount of circulating air as the intake air is exhausted to the outside through the overflow. In the present embodiment, as described above, the temperature rises by about 9 ° C. due to the temperature rise at the time of boosting and the heat transfer of the motor loss heat. After drying is completed, the pressure on the drain hose 9 side is kept higher than the pressure on the drain port 39 side, the rotational speed of the fan 49 is lowered to a pressure level that does not break the water seal, the water supply solenoid valve 28 is opened and flowed, and the drain trap The water sealing of 10 is recovered and the drying process is completed.

  As described above, after the drying is completed, the drain trap 10 is provided while suppressing the odor from the drain hole 39 by supplying water to the drain port 37 through the drain hose 9 while maintaining the pressure on the drain hose 9 side at a predetermined level or more. The water seal can be restored. The drain trap 10 may be recovered at the end of the drying operation (for exhaust of the drain hose) or after the drying operation is finished as long as the pressure on the drain hose 9 side is kept high.

  FIG. 6 normalizes the probability frequency distribution of the dryness of each garment based on the drying result when the garment load is 5 kg, the fan rotational speed is 13400 r / min, and the blowing air speed from the nozzle is about 83 m / s. . Here, the dryness is a percentage value obtained by dividing the original mass of a completely dried fabric by the mass of the fabric after the test. The figure also shows the results when using a heater of about 900 W under similar test conditions. The result of the heater OFF is the result of drying to a slightly higher level than the result using the heater 50 (approximately proportional to the average dryness of each in the figure). In this embodiment, the contact time with the warm air of each garment can be sufficiently secured, heat transfer between the garments is improved, and variation in the dryness of individual garments is suppressed.

FIG. 7 is a diagram illustrating an example of a finished clothing state with respect to a difference in wind speed vm / s under a load of 2 kg and a constant air volume of 1.5 m ³ / min. The wind speed is a value obtained by dividing the air volume of the fan 49 by the area of the outlet 11a of the nozzle outlet. In the figure, (a) shows a finished state at a wind speed of 20 m / s, (b) shows a finished state at a wind speed of 48 m / s, and (c) shows a finished state at a wind speed of 82 m / s. As can be seen from this figure, it can be seen that the finish deteriorates when the wind speed is lower than 48 m / s.

  FIG. 8 is a block diagram of the control device 41 of the washing / drying machine. A microcomputer 26 is connected to the operation button input circuit 25, the water level sensor 44, and the temperature sensor 45 connected to each switch 24, 24a, 24b, and various information signals in the user's button operation, washing process, and drying process. Receive. The output from the microcomputer 26 is connected to the drive circuit 5, and is connected to the water supply solenoid valve 28, the drain valve 8, the motor 26, the fan 49, and the heater 62 which is the heating means of this embodiment (not used in the operation of this embodiment). ), Connected to the intake valve 13 and the like, and controls opening / closing, rotation, and energization thereof. Further, it is connected to a 7-segment light emitting diode display 7, a light emitting diode 15, and a buzzer 19 for notifying the user of the operating state of the washing machine. The microcomputer 26 is activated when the power switch 47 is pressed and the power is turned on, and executes a basic control processing program for washing and drying as shown in FIG.

Step S101
Check the status of the washer / dryer and make initial settings.

Step S102
The display 7 of the operation panel 48 is turned on, and a washing / drying course is set according to an instruction input from the operation button switch 24b. When no instruction is input, the standard washing / drying course or the previous washing / drying course is automatically set. For example, when an instruction is input to the operation button switch 24a, a high finishing course for drying is set. Here, either a drying course using a heater or a power-saving drying course that does not use a heater (heating means of this embodiment) that requires time but can reduce power consumption is appropriately selected by a selection means such as an operation button. And set.

Step S103
The process branches after monitoring the instruction input from the start switch 24 of the operation panel 48.

Step S104
After the load level is automatically measured by the sensing operation and an indicator of the detergent input is displayed, washing is executed. At this time, the drying operation can be changed even after the load level is confirmed. Laundry is performed in the order of washing, intermediate dehydration, rinsing, and final dehydration. Since this is the same as a normal drum-type washing and drying machine, a detailed description thereof is omitted.

Step S105
The process branches after confirming whether the washing / drying course is set. When only the washing course is set, the driving is ended.

Step S106
When a washing / drying course is set, high-speed dehydration is performed. In the high-speed dehydration, the fan 49 is operated at medium and low speeds, and the air whose temperature has been increased by the pressure increase is blown into the rotary drum 29 to warm the clothes. At the same time, the rotating drum 29 is rotated stepwise to a high speed, and water is effectively dehydrated from the warmed clothes (the viscosity of the water decreases as the temperature rises so that water can be efficiently dehydrated).

  FIG. 10 shows an example of the upper limit setting of the drum rotation speed during high-speed dewatering. When the amount of the laundry 30 is small, that is, the load is light, there is a high probability that the clothes are biased and fixed in the circumferential direction of the drum, and a so-called unbalanced state is likely to occur. For this reason, the upper limit is assumed to be depressed. Furthermore, in the power-saving drying operation, it is desired to remove moisture from the clothes by dehydration as much as possible, so the setting is higher than the normal drying that is suppressed by considering the noise suppression.

  In the present embodiment, the rotation speed of the fan 49 is set to 11000 rotations or less per minute. This is to prevent the allowable current value (15 A) from being exceeded. Since the water that has flowed into the air duct 40 from washing to dehydration can be quickly removed from the drainage port 20 through the bellows hose 52 and the outer tub side mounting portion 53 that are inclined downward toward the rear surface of the outer tub 20, Heat loss during drying can be reduced. After dehydration is completed, an action to loosen the tangling between the clothes is performed. Specifically, the drum is rotated left and right at a low speed (for example, 20 to 50 revolutions per minute) to remove the entanglement. When power-saving drying operation is selected, the dehydration speed is set higher than during normal drying operation, so the clothes are stuck to the inside of the drum and the clothes are strongly entangled. Strengthen. In this way, in the power saving drying operation without using the heater 50, the rotational speed of the rotary drum 29 at the time of final dehydration in the washing and drying operation is made higher than in the case of the normal drying operation using the heater 50. The amount of water contained in the clothing can be reduced as much as possible at the stage of the dehydration process before entering, and the drying operation time can be shortened.

Step S107
Perform the first half of the drying process. The fan 49 repeats high-speed rotation and forward / reverse rotation of the rotating drum 29, and blows the air whose temperature has been increased by adiabatic compression from the nozzle portion to the clothing while changing the position of the clothing in the rotating drum 29. At this time, the condensed water dehumidified from the high-humidity air in the blower duct 20 is quickly drained through the bellows hose 52 and the outer tank side mounting part 53 that are inclined downward from the bottom of the blower duct 40 toward the rear surface of the outer tank 20. Since it can remove to 37 vicinity, it can avoid that condensed water becomes a heat loss with respect to warm air. In the power saving drying operation, the temperature rise of the blown air is mainly caused by the temperature rise accompanying the pressure increase and the fan exhaust heat recovery as described above. For this reason, as long as the fan efficiency is not significantly reduced, an operation in which the rotational speed of the fan 49 is set higher than that in the normal drying operation may be used. In addition, since the start of the fan 49 is accompanied by an input of the heater 50 as a heating means in the normal drying operation, it is necessary to adjust the speed of increase in the rotational speed by current control or the like. On the other hand, in the power saving drying operation, it is not necessary to make the above adjustment, and it is preferable to start up quickly in a range that does not cause damage to the equipment.

Step S108
The process branches after confirming whether the elapsed time from the start of drying has reached the specified time.

Step S109
When the specified time has elapsed from the start of drying, or when the difference between the intermediate temperature and the initial temperature is greater than the specified temperature, the dryness of the laundry (= the weight of the dry cloth / the weight of the compress) is 0.90- It is determined as 0.95, the fan 49 is lowered to a low speed, and the air supply valve is fully opened (the air duct on the air duct side is fully closed).

Step S110
The fan 49 is returned to the high speed rotation, the pressure in the drum is increased, and the water seal of the drain trap is broken.

Step S111
The air supply valve is returned to the half open position, and the fan 49 is rotated again at a high speed to execute the latter half of the drying process. In step S102, it is confirmed whether or not a drying course that does not use the heater 50 is selected. If a course that uses the heater 50 is selected, the heater 50 is energized.

Step S112
The outer tank lower drain temperature T1a and the outside air temperature T2a are measured (setting of initial temperature).

Step S113
The process branches after confirming whether the elapsed time from the start of drying has reached the specified time.

Step S114
The outer tank lower drain outlet temperature T1b and the outside air temperature T2b for the end determination are measured.

Step S115
The process branches after confirming whether the elapsed time from the start of exhausting has reached the specified time.

Step S116
The difference between the intermediate temperature and the end determination temperature of each of the outer tank lower drain outlet temperature and the outside air temperature is obtained (ΔT1 = T1a−T1b, ΔT2 = T2a−T2b), and the temperature difference (ΔT1−ΔT2) is equal to or higher than the specified temperature. Check if it is, and branch the process. FIG. 11 shows an example of the specified temperature table for the load level. In a normal drying operation using the heater 50, since the temperature level is high, the temperature differences ΔT1 and ΔT2 can be large. On the other hand, in power-saving drying that does not use the heater 50 that is the heating means of the present embodiment, ΔT1 and ΔT2 are small even when drying progresses. For this reason, if the same specified temperature as the former is used, the end determination cannot be satisfied even though the drying is substantially finished, and as a result, the drying operation is continued. Both time and electric energy are bulky and wasteful. For this reason, as shown in FIG. 11, the specified temperature level is lowered and a table suitable for power saving drying is used.

Step S117
When the specified time has elapsed since the start of exhausting, or when the difference between the intermediate temperature and the end temperature is greater than the specified temperature, the dryness of the laundry (= dry cloth mass / compress weight) is 1.0 or more. It is judged that the drying is finished, and the rotation speed of the fan 49 is lowered to a pressure level that does not break the water seal while keeping the pressure on the drain hose 9 side higher than the pressure on the drain hole 39 side, and the water supply solenoid valve 28 is opened to cool. Water is poured to recover the water seal of the drain trap 10. At this time, when the course using the heater is selected, the heater which is the heating means of this embodiment is turned off at the same time.

Step S118
The process branches after confirming whether or not the elapsed time from opening the water supply electromagnetic valve 28 has reached a specified time.

Step S119
The process branches after confirming whether the pressure of the water level sensor 44 has reached the specified pressure.

Step S120
When a specified time has elapsed since opening the water supply electromagnetic valve 28, or when the pressure of the water level sensor 44 becomes higher than the specified pressure, it is determined that the water sealing of the drain trap 10 has been recovered, and the fan 49 is stopped. The motor 36 is stopped, the intake valve 13 is closed, the water supply electromagnetic valve 28 is closed, and the drying process is completed.

  The washing / drying machine configured as described above takes outside air into the housing in order to supplement the air inside the housing sucked into the fan 49, and exhausts heat from the outer tub 20, the motor 36, the fan 49, etc. in the housing. To warm up. About 7% of the total power consumption of the drying process can be reduced as compared with the case of directly sucking external air. Moreover, even if external air is sucked in, the moisture in the laundry 30 is discharged from the drain hose 9 to the drain outlet 39, so that the indoor environment is not deteriorated. The outer tub side mounting portion 53 of the bellows hose 52 that connects the rear surface portion of the outer tub 20 and the bottom of the air duct 40 has an upward inclination from the outer tub 20 toward the air duct 40 with respect to the washing / drying machine installation surface. . Furthermore, by making the attachment portion position at the bottom of the air duct 40 higher than the attachment portion position on the rear portion of the outer tub 20 and making the bellows hose 52 inclined, residual water from washing to dehydration is obtained. It is possible to reduce heat loss due to removal from the air flow path, and further air path loss during the exhaust process. In the present embodiment, the intake valve 13 is half-opened in the latter half of the drying in step S111. However, when the intake valve 13 is fully opened, the air passage in the air duct 40 is almost completely closed as described above (the leakage level is ignored). Therefore, the total air volume pushed out from the rotary drum 29 passes through the drainage hose 9 via the drainage port 37 or the overflow hose 17 and is discharged to the drainage hole 39. Therefore, since most of the blown air is replaced with the ambient outside air, the temperature level of the blown air is lowered, but the humidity level is also lowered. For this reason, it is preferable to adjust the opening degree of the intake valve 13 according to the load capacity and the cloth quality. Even if it is fully opened, the basic operation and the effect of this embodiment are not affected at all. Since the temperature of the blown air is lower than that in the normal drying using the heater 50 that is the heating means of the present embodiment, the circulating air quickly reaches the saturation humidity. Moreover, since no heating means is used, the rate of increase of the circulating air temperature is also slower than that in the normal drying operation. For this reason, the timing for switching from the first half of the drying process to the second half of the drying process is preferably faster than the normal drying operation, but it is preferable to adjust according to the outside air temperature and the load level.

  FIG. 12 is a diagram summarizing the dry power amount ratio and the dry time ratio according to the difference in the heating time of the heater 50 during the drying operation as an example. The result of the drying power amount and the drying time of 25 minutes of heating time of the heater 50 which is the heating means of this embodiment is set to 1.0 as a reference, and the result of the heater heating time of 13 minutes and 0 minutes (no heater heating time) is compared. As shown. As can be seen from this figure, when the heating time of the heater 50 is reduced, the amount of drying power up to 100% of the dryness can be reduced, but the time required for drying tends to increase. For this reason, the presence or absence of heating by the heater 50 is determined depending on whether priority is given to time or reduction in the amount of dry power. From this, it is easily conceivable to select a desired drying time and power saving condition by arbitrarily adjusting the energization time of the heater 50, instead of selecting use or non-use of the heater. At this time, part or all of the input that can be reduced by reducing the input of the heater 50, which is the heating means of the present embodiment, is diverted to increase the rotation speed of the fan 49, and drying is performed by increasing the blowout air speed and air volume. However, there is no problem even if it is possible to save power consumption by reducing the time required for drying. In addition, in the case of cotton cloth, such as thick towels that are difficult to dry, warm air is sent using heating means immediately after the drying in the range of power consumption that saves power compared to normal drying operation. Even if a setting for improving the finish of the sheet or automatic cloth quality detection is provided, the gist of the present invention is not impaired.

  In addition, even after the power saving drying operation is set and the drying process is started, in order to increase the drying end time, the configuration can be switched to the normal drying mode or vice versa. It doesn't matter what it is. Further, in this embodiment, the heater is used as the heating means. However, the present invention is not limited to the heater, and even if another heating means such as a heat pump or a thermoelectric element is used, the gist and effect of the present invention vary. It is not a thing. Of course, any other heating means may be used.

  FIG. 13 is an overall perspective view of the second embodiment of the present invention. In this embodiment, the blowing position into the rotary drum 29 is switched according to the drying operation course. In the case of normal drying, blown air from the blower outlet is blown from the nozzle 11 having a high wind speed by narrowing the nozzle outlet 11a provided on the front surface of the drum. In the power saving drying operation, the switching damper 54 is switched to the direction in which the air is blown to the branch duct 57, and the air is blown from the back outlet having a small throttle resistance provided on the back of the outer tub. By adopting such a configuration, during power saving drying, air is blown from the blowout opening having a smaller squeezing resistance. Therefore, a desired air volume can be ensured even if the rotational speed of the fan 49 is reduced. Thereby, the power consumption of the power saving drying operation can be further reduced. On the other hand, since the high wind speed can be maintained during normal drying, the finish can be secured. Also, if necessary, in either operation, there is essentially no problem even if the blowing positions are switched to each other in the middle of the operation and the choice of ensuring the finish by reducing the power consumption or maintaining the wind speed is made.

  FIG. 14 shows an enlarged view of the nozzle portion 53 of the second embodiment of the present invention. In the present invention, a partition plate 55 is provided in the nozzle portion 53, and a damper 54 is provided at one inlet of the air passage divided by the partition plate 55. In the normal drying operation, the damper 54 is closed to maintain a high wind speed as shown in FIG. In the case of the power saving drying operation, as shown in FIG. 5B, the damper 54 is opened to be the nozzle outlets 11a and 11b, thereby reducing the ventilation resistance and reducing the input of the fan 49 for the same air volume. To do. Since the configuration of blowing directly into the rotary drum 29 from the front can be maintained, the finish can be secured. With the above-described configuration, it is possible to perform an operation that improves the finished state in the normal drying operation, and it is possible to perform an operation with reduced power consumption in the power saving drying operation. Further, in a series of drying operations, a combination of the former nozzle outlet 11a operation and the latter nozzle outlet 11a, 11b combined operation, for example, clothing has a lot of moisture and has a great influence on the finish. In the initial stage of drying, the finish of the former is ensured to some extent by high-speed air as the nozzle state, and in the latter half, the finish and power saving can be adjusted by setting the latter nozzle state where power saving is important. Even in a system in which a plurality of nozzle portions themselves are provided without adjusting the damper 54 and the number of ventilations is adjusted, there is essentially no change.

DESCRIPTION OF SYMBOLS 1 Base 2 Outer frame 3 Door 4 Bellows 5 Drive circuit 6 Drying device 7 Indicator 8 Drain valve 9 Drain hose 10 Drain trap 11 Blow nozzle 11a Blow nozzle outlet 12 Circulating air 13 Intake valve 14 Housing internal air 15 Light emitting diode 16 External air 17 Overflow hose 18 Air supply hole 19 Buzzer 20 Outer tank 21 Suspension 22 Front cover 23 Back cover 24, 24a, 24b Switch 25 Operation button input circuit 26 Microcomputer 27 Filter duct 28 Water supply solenoid valve 29 Rotating drum 30 Laundry 31 Fluid Balancer 32 Motor fixture 33 Lifter 34 Metal flange 35 Spindle 36 Drum drive motor 37 Drain hole 38 Packing 39 Drain port 40 Air duct 41 Controller 42 Air inlet 43 Base 44 Water level sensor 45 Temperature sensor 46 Vibration sensor 47 Power switch 48 Operation panel 49 Fan 50 Heater 51 Fan motor 52 Bellows hose 53 Nozzle section 54 Switching damper 55 Partition plate 56 Back outlet 57 Branch duct

Claims (6)

  An inner tub that is rotatably arranged in the outer tub and becomes a drying chamber when drying, and stores laundry, a motor that drives the inner tub, a housing that supports the outer tub and forms an exterior, air In the washing and drying machine provided with the heating means for heating the air and the air blowing means for blowing air into the inner tub, the air is supplied to the clothes in the inner tub by the air blowing means without using the heating means in the entire drying process. An operation of blowing air and an operation of blowing air to clothing in the inner tub by the blowing means using the heating means, and in the case of an operation not using the heating means, an operation of using the heating means. Compared to the case, the washing / drying machine is characterized in that the rotational speed of the inner tub is increased during the final dehydration in the washing / drying operation.   An inner tub that is rotatably arranged in the outer tub and becomes a drying chamber when drying, and stores laundry, a motor that drives the inner tub, a housing that supports the outer tub and forms an exterior, air In the washing and drying machine provided with heating means for heating the air and air blowing means for blowing air into the inner tub, the heating means is not used in the entire drying process, and the air whose temperature is increased by the air blowing means is A means for selecting an operation for blowing air to the clothes in the tank and an operation for blowing higher temperature air to the clothes in the inner tank using the heating means, and an operation not using the heating means. In this case, the time required for the final dehydration in the washing / drying operation is increased as compared with the case of the operation using the heating means.   An inner tub that is rotatably arranged in the outer tub and becomes a drying chamber when drying, and stores laundry, a motor that drives the inner tub, a housing that supports the outer tub and forms an exterior, air In the washing and drying machine provided with heating means for heating the air and air blowing means for blowing air into the inner tub, the heating means is not used in the entire drying process, and the air whose temperature is increased by the air blowing means is A means for selecting an operation for blowing air to the clothes in the tank and an operation for blowing higher temperature air to the clothes in the inner tank using the heating means, and an operation not using the heating means. In this case, the washing / drying machine is characterized in that the time from the start of drying of the fan of the air blowing means to the reaching of the predetermined number of rotations is shortened as compared with the case of operation using the heating means.   The washing and drying machine according to claim 1, wherein when the operation is not performed using the heating unit when the load is equal to or lower than a predetermined load, compared to the operation using the heating unit, the washing and drying operation at the time of final dehydration in the washing / drying operation is performed. A washing and drying machine characterized by raising the upper limit set value of the number of rotations of the inner tub.   5. The washing and drying machine according to claim 1, wherein at least in a drying operation without using the heating means, a wind speed of 48 m / s or more is blown out to the inner tub by the blowing means and blown to the clothes. Washing and drying machine.   6. The washer / dryer according to claim 1, wherein a drainage hose that drains water from the outer tub, an overflow hose for draining water that has overflowed from the outer tub, and the ambient air outside the casing through the casing. An air intake means for introducing the air into the air passage is provided, and at least in a part of the drying operation without using the heating means, ambient air is guided from the air intake means through the inside of the housing into the air passage, and the air in the outer tub is A washing and drying machine that exhausts to the outside through the overflow hose and the drain hose.