JP2013085778A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and drying machine capable of reducing power consumption without exhausting humid air into a room and implementing the drying process with laundry having less wrinkles and good finishing.SOLUTION: A washing and drying machine comprises: an outer tank to be a dry room when it is dried; an inner tub rotatably disposed in the outer tank for containing laundry; a motor for driving the inner tub; a housing supporting the outer tank and forming exterior; air blow means for blowing hot air into the inner tub; and heating means for heating air to be blown. The product of the air flow Q (m/min) from the air blow means by air speed v (m/s) blowing into the inner tub is from 90 to 120.

Description

  The present invention relates to a washing / drying machine capable of performing laundry from washing to drying.

  Drying clothes with a washing and drying machine that can perform washing to drying continuously creates high-temperature and low-humidity air with a blower fan and a heat source, and blows it into the washing tub to increase the temperature of the clothes. This is done by evaporating the moisture and discharging the evaporated moisture to the outside 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 discharging the reflux air directly 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.

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

  However, with the conventional technology that exhausts warm air after spraying on the laundry as it is, it is possible to reduce time and reduce the amount of water used and power consumption, but it is highly humid in the room around the dryer or the laundry dryer. The air is exhausted as it is, and the indoor environment is deteriorated.

  In addition, in the conventional technique in which only the finish is emphasized and the air velocity and the air volume of warm air are set, wrinkles can be reduced, but there is not much consideration for reducing the power consumption of drying.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a washing and drying machine that can reduce power consumption without exhausting high-humidity air into a room, and that has a drying process with less wrinkles and good finish.

An outer tub that becomes a drying chamber when drying, an inner tub that is rotatably arranged in the outer tub to store laundry, a motor that drives the inner tub, a housing that supports the outer tub and forms an exterior In a washing and drying machine comprising a body, a blowing means for blowing warm air to the inner tub, and a heating means for heating the air to be blown, the air volume Q (m ³ / min) by the blowing means and the inside of the inner tub The product of the wind speed v (m / s) of the blown air was set to 90 or more and 120 or less.

  According to the present invention, it is possible to achieve both the air speed and the air volume that are optimal for heat transfer from warm air to the clothes, the air volume that promotes heat exchange between the circulating air and the air flow path, and the air speed and air volume that are effective for stretching wrinkles. . Accordingly, the dry power consumption can be reduced by optimizing the balance between the evaporation from the clothing and the condensation in the blower path while extending the wrinkles and maintaining the dry finish.

1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention. The schematic diagram of the washing-drying machine at the time of the heater heating in 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. The schematic diagram 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. FIG. 6 shows the results of drying performance according to the first embodiment of the present invention with respect to the difference of air volume Q (m ³ / min) × wind speed v (m / s). An example of a dry finish according to the first embodiment of the present invention with respect to the difference of air volume Q (m ³ / min) × wind speed v (m / s) is shown. 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 which concerns on 1st Example of this invention is shown. The enlarged view of the blowing nozzle part which concerns on 2nd Example of this invention is shown. 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.

  Further, as shown in FIG. 2, the drum-type washing and drying machine of the present embodiment includes a casing that forms an exterior by the above-described outer frame 2 and the like, and an outer tub that is supported by the casing and that becomes a drying chamber when drying. 20, and an inner tub (rotary drum 29) that is rotatably disposed in the outer tub 20 and stores the laundry 30. And while warm air is blown to the rotating drum 29 to evaporate moisture from the laundry 30 that is the object to be dried, the outer tub 20, while the air containing the vapor passes through the outer tub 20 and the air duct 40, The air is exchanged with the air duct 40, and a part of the steam is condensed to dehumidify. FIG. 2 is a cross-sectional view showing the flow of warm air during the circulation heating and drying process in such a washing and drying machine. FIG. 3 is a perspective view of the air flow at the time of the circulating heating and drying process, indicated by arrows, showing the internal structure by cutting a part of the housing.

  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 hole 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 air duct 40 on the rear surface of the drum, and is joined with the hose from the drain hole 37 before the drain 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 40 that guides warm air to the laundry 30 in the rotary drum 29, a fan 49, and a blowout nozzle 11 as a blowing means, and a heater 50 that heats the air to be blown as a heating means. . 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 blowing nozzle 11 are provided between the uppermost surface and the center of the outer tub 20 and at a position in front of the center of the outer tub 20, and the flexible bellows 4 is connected to the outer tub 20 substantially perpendicularly. Thus, the vibration of the outer tub 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.

  In the drum type washing and drying machine configured as described above, first, in the washing process, the laundry 30 is put into the rotating drum 29, and water is supplied with the drain valve 8 closed to store the washing water in the outer tub 20. The laundry 30 is washed by rotating the rotary drum 29. 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. Moreover, 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 of 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 56 that connect the rear surface portion 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 portion of the outer tub 20, At the end of washing, the water is quickly drained from the outer tub 20 through the drain port to the outside of the machine.

  Next, 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 water at the time of dehydration is wound up to the air duct 40 side, the bellows hose 52 and the outer tank side mounting portion 56 that connect the back surface of the outer tank 20 and the bottom of the air duct 40 are connected to the outer tank 20 Since it is inclined downward toward the back surface, it can be quickly returned to the outer tub 20 side. When high-speed dehydration is reached, 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, the air heated by the heater 50 is heated into the rotating drum 29 through the outlet 11 a of the blowing nozzle 11 to exchange heat with the laundry 30. At the same time, moisture is evaporated from the laundry 30. The air that has become highly humid including the evaporated water is guided to the fan suction port through the blower duct 40, heated again by the heater 62 provided at the fan outlet as needed, and blown into the rotary drum 29. The intake valve 13 serving as an intake means that can be opened and closed to intake air outside the air passage into the air passage forms a part of the wall surface of the air duct 40 and isolates the inside and outside of the air duct 40 from each other. Closed. When the humid air at the outlet of the rotary drum 29 passes through the outer tub 20 and the air duct 40, heat is exchanged with the outer tub 20 and the air duct 40, and moisture corresponding to the decrease in the saturated vapor pressure is supplied to the outer tub 20 and the air blast. It is condensed on the wall surface of the duct 40.

In the present invention, the value of air volume Q (m ³ / min) × wind speed v (m / s) at the drum inlet is limited. The air volume Q (m ³ / min) is the exhaust or intake air volume of the fan 49, and the wind speed v (m / s) is the air volume Q (m ³ / min). The area (mm) of the outlet 11a of the blowing nozzle 11 ² ) and average wind speed divided by 60 (s). In order to obtain a high wind speed, a certain amount of air flow is required, but by making the wind speed and wind speed appropriate, heat transfer performance from the air to the duct at the time of circulation is also secured, and from the outside of the outer frame 2 to the outside of the machine It is possible to efficiently dehumidify the circulating air while accumulating heat in the housing without throwing away heat. Further, the input of the heater 50 is set to about 1 to 1.2 (kW) in order to suppress the power consumption of the entire washing / drying machine to 15 (A). If the temperature rise by adiabatic compression of the fan 49 is large, the input of the heater 50 may be lower than this. In this embodiment, since the pressure rise by the fan 49 is about 6000 (Pa), the temperature rise due to adiabatic compression is about 5 (° C.). Moreover, when controlling the rotation speed of the fan 49, you may control so that the input of the whole washing-drying machine may become below a desired input. In this embodiment, the outlet 11a of the blowing nozzle 11 is 252 (mm ² ), and the air volume Q (m ³ / min) × speed v (m / s) is 1.5 (m ³ / min) × 83 (m / S) = 104. The water condensed in the air duct 40 eventually accumulates in the bellows hose 52 from the bottom of the duct. It can be transferred to the vicinity of the drainage hole 37 via.

  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. By opening the intake valve 13 on the suction side of the fan 49, the air in the housing outside the blower duct 40 is sucked and blown into the rotary drum 29. In FIG. 4, the intake valve 13 is opened so that the intake valve 13 is folded inside the air duct 40 so as to completely block the air passage in the air duct 40 (ignoring the leakage level) completely (the air intake valve 13 itself). Is fully open). Therefore, all the air pushed out from the rotating drum 29 passes through the drainage hose 9 via the drainage hole 37 or the overflow hose 17, breaks the water seal of the drainage trap 10, and is discharged to the drainage port 39. In the case of a general drain trap, since the water seal height is about 50 to 80 (mm), the pressure on the drain hose 9 side is required to be about 1000 (Pa) or more to break the water seal. Moreover, in order to suppress the odor from the drain outlet 39, it is necessary to ensure a high pressure (a pressure higher than a predetermined pressure) even after the water seal is broken. The fan 49 is controlled. As described above, the exhaust from the rotary drum 29 is exhausted through the connection hose from the drain hole 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 intake holes 18 at the top of the housing, the temperature becomes high. Then, the air is taken into the air passage from the intake valve 13. 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 rotary drum 29 includes an outer tank side mounting portion 56 and a bellows hose 52 on the back surface of the outer tank 20. On the other hand, it becomes an upward slope, and the inflow angle of the exhaust into the air blowing duct 40 becomes an obtuse angle larger than 90 degrees, and the air path loss of the exhaust path can be reduced.

  FIG. 5 schematically shows the operation pattern of the drying process and the change in the temperature of the hot air sent to the rotary drum 29 in this embodiment.

  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. At this time, the heater 50 provided at the outlet of the fan 49 is energized to ensure the temperature of the hot air blown from the blowout nozzle 11 to the rotary drum 29. The hot air is heat-exchanged with the clothing 30 in the rotary drum 29 and contains moisture evaporated by a part of the heat, thereby becoming high humidity. The air that has become highly humid is returned from the rotary drum 29 to the suction of the fan 49 through the outer tub 20 and the air duct 40. At this time, when it becomes below a dew point by cooling by the outer tank 20 or the air duct 40, it condenses on the inner wall of the outer tank 20 and the air duct 40, and is dehumidified. Thereby, the temperature of the outer tub 20 and the air duct 40 gradually increases with the circulating air, and heat can also be stored in the circulation system.

  In the latter half of the drying process, by opening the intake valve 13 on the suction side of the fan 49, the air inside the casing outside the blower duct 40 is sucked and blown into the rotary drum 29. Since the intake valve 13 blocks an air path (not shown) in the air duct 40, the pressure in the rotary drum 29 is increased, and the air in the rotary drum 29 is exhausted to the drain port 39 via the overflow hose 17 and the drain hose 9. Is done. Depending on the opening / closing ratio of the intake valve 13, it is possible to circulate partially, but in this embodiment, since it is fully closed, the heater 50 is not energized and is heated by the exhaust heat of the fan motor 51 and the drum driving motor 36. The air inside the casing is sent into the rotary drum 29 as warm air with adiabatic compression of the fan 49. For this reason, the warm air temperature is high because exhaust heat can be sufficiently taken immediately after the intake valve 13 is opened. However, the warm air temperature decreases with the passage of time and decreases to near the outside air temperature at the end of the drying.

In the present embodiment, the intake valve 13 is substantially fully opened as described above, and substantially the entire air volume is replaced with the ambient outside air. As described above, in order to completely shut off the air passage (not shown) in the air duct 40, the pressure in the outer tub 20 is increased, and the rotational speed of the fan 49 is maintained at the same value as during the total air flow circulation in the first half of drying. However, the air volume is reduced to 0.9 (m ³ / min). Accordingly, the wind speed v (m / s) is 63 (m / s), and the air volume Q (m ³ / min) × wind speed v (m / s) = 60. If the angle θ (described in FIG. 4) at which the intake valve 13 is bent to the inside of the air duct 40 is set to a half-open state that is smaller than when fully opened, and only a part of the circulating air volume is replaced with the ambient outside air, the pressure in the outer tub 20 Does not rise, and the wind speed does not decrease with respect to the total circulation. Replacing a part of the circulating air volume is slightly superior to the finish, but the dehumidification from the circulating air becomes insufficient and is not suitable for reducing the power consumption. Therefore, in this embodiment, in order to ensure the finish, in the first half of drying (including a lot of moisture) where wrinkles are easily removed, the value of air volume Q (m ³ / min) × wind speed v (m / s) is increased (for example, 90 In the latter half of the drying, the power consumption is reduced by suppressing the value of air volume Q (m ³ / min) × wind speed v (m / s) (for example, 42 or more and 66 or less).

  Note that “first half of drying” and “second half of drying” are not limited to refer to half and half of the entire drying process. That is, if it is the 1st drying process which circulates between the inside of a ventilation path and the inside of the rotating drum 29, and the 2nd drying process performed after that which exhausts the air outside the ventilation path which was suck | inhaled by the suction means Well, each time allocation should be changed according to the amount of clothing and the quality of the fabric.

  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 port 39 by supplying water to the drain hole 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 shows a drying performance evaluation under a drum volume of about 87 (L) and a load of 6 (kg). The circulation process in the first half of drying was 25 (min), and the input of the heater 50 was about 1200 (w). In FIG. 6A, the horizontal axis represents the time required for drying at a dryness of 100%, the vertical axis represents the dry power consumption at a dryness of 100%, and the air volume Q (m ³ / min) during heating circulation. X A tendency due to a difference in wind speed v (m / s) is shown. As described above, the wind speed here is an average wind speed obtained by dividing the air volume Q (m ³ / min) by the area (mm ² ) of the outlet 11a of the blow nozzle 11 and 60 (s). That is, it means the average wind speed value obtained by dividing the air volume sent from the fan by the nozzle cross section. The dryness is a percentage value obtained by dividing the original mass of the completely dried fabric by the mass of the fabric after the test.

In FIG. 6 (a), the drying time and the drying power amount are functions for the same air volume Q (m ³ / min) × wind speed v (m / s) in the air exhaust process in the latter half of the drying process. It depends on the air volume setting. Although the time required for drying increases as the air volume in the blow-off process is small, the amount of power is small. For example, in the present embodiment, as described above, in the latter half of the drying process, the intake valve 13 is fully opened and the air volume Q is set to 0.9 (m ³ / min), and the wind speed v (m / s) is 63 accordingly. (M / s), and the air volume Q (m ³ / min) × wind speed v (m / s) was adjusted to 60. The drying time when the degree of dryness is 100% is 160 (min) (point A in the figure). Further, when the air volume Q is set to 0.8 (m ³ / min) in order to reduce the dry power consumption, the wind speed v is 53 (m / s), and the air volume Q (m ³ / min) × wind speed v (m / S) = 42 takes a drying time of 180 (min), but the power consumption is further reduced by about 3% with respect to the air volume Q of 0.9 (m ³ / min) (point B in the figure). On the other hand, when the air volume Q is 1.0 (m ³ / min), the wind speed v is 66 (m / s), and the air volume Q (m ³ / min) × the wind speed v (m / s) = 66 is achieved. Although the time can be shortened to 140 (min), the power consumption is about 3% worse than the air volume Q of 0.9 (m ³ / min) (point C in the figure). Therefore, the air volume Q in the drying operation with the intake valve 13 fully opened is preferably determined by the balance between the required time for drying and the amount of power consumption intended from the amount of cloth and cloth quality.

FIG. 6B also shows the tendency of the amount of dry power with respect to the air volume Q (m ³ / min) × the wind speed v (m / s) during heating circulation when the drying time is 160 (min). From this figure, Q (m ³ / min) × wind speed v (m / s) when the intake valve 13 is fully closed is a preferable operation for reducing the amount of dry electric power within a range of 90 or more and 120 or less. I understand that.

FIG. 7 is a diagram illustrating an example of a finished clothing state with respect to a difference in air volume Q (m ³ / min) × wind speed v (m / s) during heating circulation. 7 (a) is Q (m ³ / min) × wind velocity v (m / s) finished state of ≒ 100, FIG. 7 (b) Q (m ³ / min) × wind velocity v (m / s) ≒ 73 The finished state at the time of is shown. As can be seen from this figure, when the air volume Q (m ³ / min) × wind speed v (m / s) during heating circulation deviates significantly from the range of 90 to 120, the final finish is also deteriorated.

When drying with heating only by air circulation without using cooling water or low-temperature heat medium, heat transfer from warm air to clothing, moisture evaporation from clothing using a part of the heat, circulation of air The drying performance is affected by dehumidification due to the condensation on the wall surface when the dew point is reached while applying heat to the air passage to be performed. The blowing air velocity v (m / s) into the rotating drum 29 generally affects the heat transfer performance from the warm air to the clothing. On the other hand, the air volume Q (m ³ / min) generally affects the amount of heat given from warm air to clothing and the amount of steam transferred from the clothing. For this reason, in order to promote drying, both should secure a certain amount of physical quantity. However, even if one of the physical quantities becomes larger than a certain level and the balance is lost, drying is not promoted, and the drying rate does not increase with an increase in input.

For example, if the blowout air velocity v (m / s) is large and the air volume Q (m ³ / min) is small, the heat transfer performance is improved, but the humidity (evaporated water) carried away by the air volume Q (m ³ / min) is increased. ) Is limited, and evaporation is suppressed. Further, if the air volume Q (m ³ / min) is small, the wind speed v (m / s) of the air passage becomes low, and wall surface condensation is also suppressed. On the other hand, when the air volume Q (m ³ / min) is large and the blown air speed v (m / s) is small, the heat transfer performance from the warm air to the clothing is not promoted, and the evaporated water from the clothing is not air volume Q (m ³ / Min), and the air humidity is circulated while being relatively low, resulting in poor efficiency. If the humidity is low, the heat exchange in the air passage will not be below the dew point, and moisture removal by condensation will not proceed. Therefore, for a drum volume of about 55 (L) to 95 (L) and an air passage length of 600 (mm) to 800 (mm), the air volume Q (m ³ / min) × wind speed v (m / s) is 90. ~ 120 is preferred. Here, it is preferable that the fan 49 serving as a drive source has the highest efficiency in the vicinity of the rotational speed that generates the air volume and the wind speed.

  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 connected to the water supply solenoid valve 28, the drain valve 8, the motor 26, the fan 49, the heater 62, the intake valve 13, and the like, and controls opening / closing, rotation, and energization thereof. To do. 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.

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

Step S104
Perform the laundry. 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, hot air dehydration is performed. In the hot air dehydration, the fan 49 is operated at a low speed, the heater 50 is energized, and hot air is blown into the rotary drum 29 to raise the temperature of the clothes. At the same time, the rotating drum 29 is rotated at high speed to effectively dehydrate moisture from the warmed clothes (the viscosity of the water decreases as the temperature rises, so that it can be efficiently dehydrated). In the present embodiment, the rotation speed of the fan 49 is set to about 11000 rotations per minute. This is to prevent the allowable current value (15 A) from being exceeded. Water that has flowed into the air duct 40 from washing to dehydration can be quickly removed from the drainage hole 20 to the outside through the bellows hose 52 and the outer tub side mounting portion 56 that are inclined downward toward the rear surface of the outer tub 20. Heat loss during drying can be reduced.

Step S107
Dry operation 1 is executed. The fan 49 is rotated at a low speed, the heater 50 is energized, the forward and reverse rotation of the rotary drum 29 is repeated, and hot warm air is blown on the clothes while changing the position of the clothes in the rotary drum 29. At this time, the condensed water dehumidified from the high-humidity air in the blower duct 40 is quickly drained through the bellows hose 52 and the outer tank side mounting part 56 that are inclined downward from the bottom of the blower duct 40 toward the back 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 a warm air.

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 heater 50 is turned off, the air supply valve 13 is opened, the fan 49 is rotated at a high speed, and the moisture of the laundry 30 is discharged from the drain hose 9 to the drain port 39. Since it is ascending upward with respect to the air duct 40 from the back surface part of the outer tub 20, the air path loss of the air duct 40 inflow part can be made small.

Step S110
The outer tank lower drain temperature T1a and the outside air temperature T2a are measured (setting of initial temperature).

Step S111
The process branches after confirming whether the elapsed time from the start of drying has reached the specified time.

Step S112
The outer tank lower drain outlet temperature T1b and the outside air temperature T2b for the end determination are measured.

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

Step S114
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.

Step S115
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 port 39 side, and the water supply solenoid valve 28 is opened and cooled. Water is poured to recover the water seal of the drain trap 10.

Step S116
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 S117
The process branches after confirming whether the pressure of the water level sensor 44 has reached the specified pressure.

Step S118
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 drum driving motor 36 is stopped, the air supply 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 external air into the housing in order to supplement the air inside the housing sucked into the fan 49, and the outer tub 20, the drum driving motor 36, the fan 49, etc. Warm by exhaust heat. About 7% of the total power consumption of the drying process can be reduced as compared with the case of directly sucking external air. Further, even if external air is sucked, the moisture in the laundry 30 is discharged from the drain hose 9 to the drain port 39, so that the indoor environment is not deteriorated.

  In addition, the outer tub side mounting portion 56 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 machine installation surface. It is. 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.

FIG. 10 shows an enlarged view of the nozzle portion 53 of the second embodiment of the present invention. In this embodiment, 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 into two by the partition plate. In an operation that emphasizes energy saving, the damper 54 is closed and the air volume Q (m ³ / min) is divided by the area (mm ² ) and 60 (s) of the outlet 11a of the blowing nozzle 11 as shown in FIG. The product of the averaged wind speed v (m / s) and Q (m ³ / min) is set to 90 to 120, and in the case of an operation that emphasizes the finish, it is preferable that both the air volume and the wind speed are larger. As shown in (b), the damper 54 is opened, and the average wind speed v obtained by dividing the air volume Q (m ³ / min) by the area (mm ² ) of the outlets 11 a and 11 b of the blow nozzle 11 and 60 (s). Let the product of (m / s) and Q (m ³ / min) be larger. By adopting the above configuration, it is possible to select an operation that further improves the finished state. Further, the method of adjusting the number of ventilations by providing a plurality of nozzles 53 themselves without providing the dampers 54 is essentially unchanged.

  FIG. 11 shows an enlarged view of the nozzle portion 53 of the third embodiment of the present invention. In the present embodiment, the cross section of the outlet 11a of the blowing nozzle 11 is a circle or a substantially ellipse. By setting it as such a structure, since the local wind speed in the nozzle center can be raised, without changing the average wind speed in the exit 11a of a blowing nozzle, the drying from clothing can be promoted more.

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, 11b Blow nozzle outlet 12 Circulating air 13 Intake valve 14 Internal air 15 Light emission Diode 16 External air 17 Overflow hose 18 Air intake 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 Main shaft 36 Drum drive motor 37 Drain hole 38 Packing 39 Drain port 40 Air duct 41 Controller 42 Inlet port 43 Base 44 Water level sensor 45 Temperature sensor Sensor 46 Vibration sensor 47 Power switch 48 Operation panel 49 Fan 50 Heater 51 Fan motor 52 Bellows hose 53 Nozzle part 54 Damper 55 Partition plate

Claims (5)

An outer tub that becomes a drying chamber when drying, an inner tub that is rotatably arranged in the outer tub to store laundry, a motor that drives the inner tub, a housing that supports the outer tub and forms an exterior In a washing and drying machine comprising a body, a blowing means for blowing warm air to the inner tub, and a heating means for heating the air to be blown, the air volume Q (m ³ / min) by the blowing means and the inside of the inner tub A product having a wind velocity v (m / s) of blown air is 90 or more and 120 or less.   2. The drying process according to claim 1, further comprising: an air intake means that can be opened and closed in order to draw air outside the air passage inside the air passage, and the air is circulated between the air passage and the inner tank; A washing and drying machine comprising a drying step of exhausting air outside the air blowing path sucked in by the air. The first drying step according to claim 1, further comprising an air intake means that can be opened and closed in the air passage to inhale air outside the air passage, and circulates air between the air passage and the inner tank. A second drying step that is performed after the first drying step and exhausts the air outside the air passage that has been sucked in by the intake means, and the air volume Q (m ³ / min during the first drying step) ) And the wind speed v (m / s) is 90 to 120, and the product of the air volume Q (m ³ / min) and the wind speed v (m / s) during the second drying step. The washing and drying machine is characterized in that it is 42 to 66. In Claim 1, A plurality of nozzle parts for applying air from the air blowing means to clothing in the inner tub are provided, and the product of the air volume Q (m ³ / min) and the wind speed v (m / s) is adjusted. A washing and drying machine characterized by being able to do so. In Claim 1, the nozzle part for applying the air from the said ventilation means to the clothing in the said inner tank is divided into several air paths by a partition, The said air volume Q (m < ³ > / min) and the said wind speed v (m / S). A washing / drying machine characterized in that the product of / s) can be adjusted.