KR100693639B1 - Washing and drying machine - Google Patents

Abstract

The present invention relates to a laundry dryer, which includes a circulating ventilation device (31) for circulating air in an inner tank (11) through a duct (30), and in a direction opposite to the flow of air passing through the duct (30). A water injection device 35 for injecting water is provided, and the dust removal operation for removing dust carried in the circulation wind is carried out while the inner tank 11 is rotated, and the end thereof is not dependent on the dry detection means. The dust is removed from the clothing by the rotation of the inner tank 11, and when the separated dust is carried in the circulating wind and passes through the duct 30, the water is injected in the opposite direction to the flow of the circulating wind. It is adsorbed and removed, and since the end of the dust removal operation is made without depending on the dry detection means, even if the dried clothes are contained in the inner tank, the dust removal operation is not immediately terminated and sufficient dust removal operation is performed. That can be characterized in that the filters need regular cleaning to remove dust attached to the garment becomes necessary also to remove the dust sucked back to the person or to be re-attached to the garment to eliminate the problem.

Description

Laundry Dryer {WASHING AND DRYING MACHINE}

1 is an overall longitudinal side view showing a first embodiment of the present invention;

2 is a front view of the whole of the first embodiment,

3 is a longitudinal sectional view of the main part of the first embodiment;

4 is a block diagram of an electrical configuration of the first embodiment;

5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention;

6 is an enlarged longitudinal sectional view of the main part of the second embodiment, and

Fig. 7 is a diagram corresponding to Fig. 1 showing a third embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

11: inner tank 28: heater

30: duct 31: circulation ventilator

35: water injection device 42: temperature sensor

51: static eliminator 64: inner tank

71: duct 76: circulation ventilation

79: water injection device

The present invention relates to a laundry dryer capable of removing dust attached to clothes.

Conventionally, in the season when a lot of pollen, such as cedar, fir or ragweed, flies, a large amount of pollen is attached to clothes when going out, and mold spores and the like are also attached to clothes. When these are brought indoors attached to clothes, sensitive families are greatly affected. In addition, the breeding of ticks on mats, carpets, and the like, and carcasses and secretions are often attached to clothes indoors.

Thus, for example, as disclosed in Japanese Unexamined Patent Publication No. 2001-789, by accommodating the clothes with dust in a drum and rotating the drum, the dust such as pollen or the like is removed from the clothes, and the drying cycle Some of them are loaded in the air and extracted out of the drum, and trap the dust by the filter when the dry circulation air passes through the filter. In this case, the filter consists of a very thin nonwoven fabric that can capture the dust. Some filters have an allergic substance attached thereto.

As described above, the dust separated from the clothes is taken out of the drum by the dry circulation wind and captured by the filter. When the filter is clogged with the captured dust, the capture performance of the dust is reduced. For this reason, the filter had to be cleaned by human hands. The cleaning was cumbersome and also had the drawback that when cleaning the filter the dust removed from the filter was sucked up by the cleaner or reattached to the garment.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and its object is to remove dust attached to clothes without using a filter, and also that the removed dust is sucked back to a person or attached to clothes again. The present invention provides a laundry dryer that can remove dust trapped from a filter without going through a human hand.

In order to achieve the above object, the laundry dryer of the present invention includes an outer tank and an inner tank, and has a function of washing clothes in the inner tank and a function of drying them, and based on the detection result of the dry detection means in the drying operation. In which the air is circulated through a predetermined air passage in a drying operation, and water for injecting water in a direction opposite to the flow of the circulating wind in the air passage. An injection device is provided, and the dust removal operation for removing the dust carried in the circulation wind is carried out while rotating the inner tank, and the end is made without depending on the drying detection means.

According to the above means, dust is released from the clothes by the rotation of the inner tank, and when the separated dust is carried by the circulation wind and passes through the predetermined air passage, the air passage is adsorbed by the water injected in the direction opposite to the flow of the circulation wind. And removed. Further, since the end of the dust removing operation is made without depending on the drying detecting means, even if the dried clothes are put in the inner tank, the dust removing operation is not immediately terminated, and sufficient dust removing operation can be performed. In this way, the dust attached to the garment is removed without using a filter. Therefore, the filter which needs regular cleaning becomes unnecessary. In addition, when cleaning the filter can be solved the problem that the cleaner inhale dust or dust is attached to the user's clothing.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

First, Figure 1 shows the internal structure of the entire laundry dryer from the side view, the front door of the outer box (1) forming the entire outline of the laundry entrance (2) is formed almost in the center, the laundry entrance (2) is opened and closed by the door (3).

The operation panel 4 is provided in the upper part of the front part of the outer box 1. The operation panel 4 is for the user to perform various operations related to the operation of the laundry dryer, and as shown in the front view in FIG. 2, a plurality of operation switches such as a power switch, a start switch, and various selection switches. (5) and various display sections 6 are provided. In addition, there exists a "dust removal" course selection switch in the said operation switch 5 for performing the dust removal operation mentioned later as a dedicated course, and the operation panel 4 is equipped with the various display part 6 also.

An operation circuit unit 7 is provided inside the operation panel 4 (upper inner surface of the front part of the outer box 1). The operation circuit unit 7 operates in accordance with the operation of various operation switches 5 including the "dust removal" course selection switch of the operation panel 4. On the other hand, the control circuit unit 8 is provided inside the lower part of the front part of the outer box 1.

An outer tub 9 is provided inside the outer box 1. The outer tub 9 constitutes a cylindrical drum shape, and has an oblique shaft that forms an inclined shape such that its axial direction is front and rear (right and left in FIG. 1) and rises forward (up and right in FIG. 1). It is provided in the form and is supported by the left and right pair (only one side) of the elastic support apparatus 10. As shown in FIG.

Inside the outer tank 9 is provided an inner tank 11 for receiving clothing. The inner tank 11 also has a cylindrical drum shape, and is provided in a coaxial shape with the outer tank 9 (an inclined shaft shape formed in an inclined shape in the axial direction forward and backward). In addition, the inner tank 11 functions as a washing tank, a dehydration tank and a drying tank. For this reason, a large number of small holes 12, which are water passages and ventilation holes, are provided almost all over the main body portion (only a part of which is shown in FIG. 1), and a baffle for pushing up laundry is provided on the inner circumferential portion of the main body portion ( 13) is provided in plurality (only one is shown in FIG. 1).

Both the outer tub 9 and the inner tub 11 are provided with laundry openings 14 and 15 at the front part, among which the openings 14 of the outer tub 9 are bellows 16. Is tightly connected to the laundry entrance 2 of the outer box 1 so that the opening 15 of the inner tank 11 faces the opening 14 of the outer tank 9.

The back of the outer tub 9 is provided with a motor 17 as a drive device for rotationally driving the inner tub 11. The motor 17 is in this case an outer rotor type, attaches the stator 17a to the back of the outer tub 9, and attaches the rotating shaft 17c attached to the center of the rotor 17b. Inserted into (9), the center part of the back part of the inner tank 11 is attached to the front-end part of this.

The lower surface of the outer tank (9) is attached to the water storage container 18 connected to the inside of the outer tank (9), the washing water heating heater 19 is installed inside the water storage container (18) have. A drain hose 21 is connected to the rear portion of the water storage container 18 via a drain valve 20, thereby discharging the wash water in the outer tank 9 and further in the inner tank 11. have.

On the other hand, the blower 22 and the heater 23 are provided on the outer tank 9. Among these, the blower 22 is provided by installing the blower vanes 25 inside the casing 24, and installing the motor 26 rotatingly driving the blower blades 25 outside the casing 24. On the other hand, the heater 23 is formed by installing a heater 28 for generating warm air in the inside of the case 27, the inlet portion of the rear side of the case 27, the outlet portion of the front of the casing 24 of the blower 22 Is connected to.

Moreover, the air blowing pipe 29 is provided in the front part on the outer tank 9. As shown in FIG. One end of the air supply tube 29 communicates with the outlet portion in front of the case 27 of the heater 23, and the other end penetrates around the opening 14 of the outer tub 9 to open the opening 14. Headed towards me.

The rear part of the outer tub 9 is further provided with a duct 30 constituting a predetermined air passage. The duct 30 is provided on one side (left side as seen from the rear), avoiding the motor 17, and has a hollow shape as shown in FIG. 3, and communicates the lower end portion to the lower portion of the outer tub 9. The upper end portion is connected to the casing 24 of the blower 22.

Accordingly, when the blower 22 is operated in the above configuration, as shown by arrow A in FIG. 1, the air in the inner tank 11 is disposed between the outer tank 9 and the inner tank 11 from the small hole 12. After passing through the inside of the duct 30 from the lower part of the outer tank 9, and passing through the inside of the duct 30 from the lower part to the upper part, the blower 22, the heater 23, and the air supply pipe 29 are sequentially It passes and returns to the inner tank 11 from the opening part 14 of the outer tank 9. In this way, the air in the inner tank 11 is circulated, and the circulation ventilation apparatus 31 is comprised by the said duct 30, the blower 22, the heater 23, and the air supply pipe 29. As shown in FIG.

In the duct 30, a water injector 32 is provided at an upper portion thereof. Although the water injector 32 is not shown in detail, for example, it covers almost the entire length of the width in the duct 30, and the water injector 32 is provided with a plurality of fountains on the lower side, and the proximal end is located outside the duct 30. The water supply valve 34 is connected to the water supply connection pipe 33 via the water supply connection pipe 33. In this way, as shown by arrow B, the water injection device 35 which injects water in the direction opposite to the flow of the air which passes through it in the duct 30 is comprised.

In addition, the water supply valve 34 converts water supplied from a water supply source such as tap water into any one of a plurality of fountains, one of which is the water injection connection pipe 33 and the other of the fountains. As the water supply connection pipe 36, the distal end of the water supply connection pipe 36 is connected to a water supply case 37 provided above the front portion of the outer tub 9. Although the water supply case 37 is not shown in detail, the water sent from the water supply valve 34 through the water supply connection pipe 36 is supplied to the outer tank 9.

In addition, the water supply valve 34 and the drain valve 20 are both electrically powered by an electric drive such as an electromagnet or a motor.

On the other hand, the control apparatus 38 is shown in FIG. The control device 38 is included in the control circuit unit 8 and functions as a control means for controlling the overall operation of the laundry dryer. The control device 38 is configured to input various operation signals from the switch input unit 39. The switch input unit 39 is composed of various operation switches of the operation panel 4 and the operation circuit unit 7 operated according to the operation, and outputs various operation signals based on the operation of the various operation switches. have.

In addition, the control device 38 is configured to input a water level detection signal from the water level sensor 40 provided for detecting the water level in the outer tank 9 (the water level in the inner tank 11). The rotation detection signal is inputted from the rotation sensor 41 installed to detect the rotation of the motor 17, and the temperature provided to detect the temperature of the air (circulating air) passing through the circulation ventilator 31. The temperature detection signal is input from the sensor 42.

On the basis of these inputs and the prestored control program, the control device 38 is configured to give a drive control signal to the inverter circuit 43 for driving the motor 17. In addition, the water supply valve 34 And a drive control signal to the drive circuit 44 for driving the wash water heating heater 19, the motor 26 of the blower 22, the heater 28 of the heater 23, and the drain valve 20. It is made up.

Next, the operation of the laundry dryer having the above configuration will be described.

In the washing operation, the door 3 is opened to load laundry (clothing) into the inner tank 11 from the laundry entrance 2, and then the door 3 is closed to operate the operation switch of the operation panel 4. Power on, select the washing course and start operation.

The controller 38 then enters the washing stroke in the washing stroke for the first time to open the water supply connection pipe 36 side of the water supply valve 34. As a result, water supplied through the water supply valve 34 from the water supply source such as tap water is supplied from the water supply connection pipe 36 into the outer tank 9 through the water supply case 37. In addition, a detergent is placed in the water supply case 37, and the detergent is placed in the outer tank 9 (and in the inner tank 11) together with the above-described water supply.

In this situation, when the control device 38 determines that the storage level in the outer tank 9 (and the inner tank 11) has reached a predetermined level by the detection output from the water level sensor 40, The water supply valve 34 is closed and the water supply to the outer tank 9 (and the inner tank 11) is finished.

After that, the control device 38 starts the motor 17. Thereby, the inner tank 11 is rotated integrally with the rotating shaft 17c of the motor 17, and the laundry accommodated in the inside is stirred and washed. In addition, the rotation of the inner tank 11 at this time is performed by switching to forward and reverse directions.

Thereafter, the control device 38 opens the drain valve 20. Thereby, the water in the outer tank 9 (and in the inner tank 11) is discharged | emitted out of a washing machine from the drain valve 20 through the drain hose 21.

Thereafter, the control device 38 closes the drain valve 20 and ends the drainage from the outer tank 9 (and the inner tank 11).

In addition, the washing stroke includes a rinsing rinse other than the above washing stroke, and the control unit 38 proceeds to the rinsing stroke after the washing stroke. The rinsing stroke is a washing operation without using a detergent.

After the rinsing stroke, the dehydrating stroke and the drying stroke are performed in this order. Among them, the dehydration stroke is to discharge the water of the laundry in the inner tank 11 from the small hole 12 by centrifugal force by rotating the inner tank 11 at a high speed while the drain valve 20 is opened.

The drying stroke circulates the air in the inner tank 11 through the circulation fan 31 by operating the blower 22 while switching the inner tank 11 in the forward and reverse directions by the motor 17 and rotating at a low speed. At this time, by opening the water supply connection pipe 33 side of the water supply valve 34, the water supplied through the water supply valve 34 from the water supply source such as the above water supply is discharged from the water injection connection pipe 33. It is sent to the water injector 32 and injected from the water injector 32 into the duct 30 in a direction opposite to the flow of the circulation wind. As a result, the circulation air is cooled and dehumidified in the duct 30. The dehumidified air is heated by the heater 23 to become warm air, which in turn is sent into the inner tank 11 to dry the laundry in the inner tank 11. Therefore, at this time, the circulation ventilator 31 including the motor 17, the blower 22, and the heater 23 functions as a drying means.

Further, in the drying stroke, when the control device 38 determines that the temperature of the air (circulating air) passing through the circulation ventilation device 31 has reached a predetermined temperature or more by the detection output from the temperature sensor 42. In the end, the drying administration is completed and a series of washing courses are completed. Therefore, at this time, the temperature sensor 42 functions as dry detection means.

When clothes with dust such as pollen are placed in the inner tank 11, and the operation is started by selecting the "dust removal" course, the control unit 38 moves the inner tank 11 by the motor 17 in both directions. By operating the blower 22 while rotating at low speed, the air in the inner tank 11 is circulated through the circulation ventilator 31. At this time, the water supply connection pipe 33 side of the water supply valve 34 is opened, whereby water supplied from the water supply source such as tap water through the water supply valve 34 is injected from the water injection connection pipe 33. And injects water in a direction opposite to the flow of air passing through it from the water injector 32 into the duct 30. That is, the same operation as the drying administration alone in the washing course is carried out.

However, in the above operation, when the dust is released from the clothes by the rotation of the inner tank 11, and the separated dust is transported to the circulation wind and passes through the duct 30, the flow of the circulation wind by the water injector 32. And is adsorbed and removed by the water injected in the opposite direction. Further, the dropped dust reaches the outer tank 9 together with the water from the lower part of the duct 30, and at this time (even in the drying stroke during the washing course), the drain hose 20 is opened from the drain valve 20 in an open state. 21) is discharged out of the washing machine.

In the "dust removal" course, the end of the dust removal operation is performed by, for example, time setting without depending on the detection result of the temperature sensor 42 (dry detection means). By doing in this way, even if a dried garment is put in an inner tank, a dust removal operation is not complete | finished immediately and sufficient dust removal operation can be performed. In addition, the time setting is performed by mode, for example, 30 minutes in simple mode, 45 minutes in normal mode, and 60 minutes in elaborate mode. As a result, the dust removal operation can be performed in accordance with the degree of adhesion of the dust to the clothes and the amount of the clothes.

In this way, the dust attached to the garment is removed without using a filter as conventional. Therefore, the filter which needs regular cleaning becomes unnecessary. In addition, it is possible to eliminate the problem that the user inhale the dust removed by cleaning the filter, or the dust is attached to the user's clothing again.

In addition, in this configuration, the above-described dust removal operation is carried out in a dedicated course ("dust removal" course) that can be selected by the user, whereby the convenience of use can be improved, and water washing is impossible, Even clothing such as wool coat or fur can sufficiently remove the adhered dust. However, the dust removal operation may be combined with other operations.

In addition, in this structure, the inner tank 11 is rotated by the inclined axis, and by doing so, it is possible to stir clothes more efficiently and to drop dust, thereby making it possible to remove dust more efficiently. However, in order to acquire the said effect, the inner tank 11 may be rotated by the horizontal horizontal axis instead of the inclined axis | shaft.

In addition, in this configuration, during the dust removal operation, the water injected into the duct 30 is discharged out of the washing machine, whereby the dust removed from the clothes does not remain in the washing machine, and the management thereof can be made unnecessary.

In addition, in this configuration, the circulating ventilator 31 and the water injection unit 35 serve both for dust removal operation and for drying operation, thereby suppressing an increase in product cost without requiring a separate dedicated device. can do.

Here, in the above-described dust removal operation, the amount of circulating air by the blower 22 may be increased than in the drying operation. By doing in this way, the air volume of the circulation ventilation apparatus 31 which carries out the dust which removed from clothes to the washing machine can be made large, and dust removal is made more efficient. In addition, the increase in the circulating wind amount can increase the rotational speed of the motor 26 of the blower 22 by 20%, for example, by increasing the speed from 4000 rpm to 4800 rpm in a dry operation, thereby making dust removal more efficient. I can do it well.

In the dust removal operation, the rotation speed of the inner tank 11 may be lowered (for example, 50 rpm) than in the drying operation. By doing in this way, clothes can be prevented from adhering to the circumferential surface of the inner tank 11 by centrifugal force, the agitation of clothes can be made efficient, and the fall of dust from clothes can be improved. In this case, the switching frequency of the inner tank 11 in the rotational direction may be increased (for example, once every 15 seconds) than in the drying operation (for example, once every 30 seconds). Even in this way, the agitation of the clothes can be made efficient, and the removal of dust from the clothes can be improved. In addition, the rotation speed of the inner tank 11 in the dust removal operation is lowered than in the drying operation, and the switching frequency of the rotation direction of the inner tank 11 is increased in the drying operation. You may employ | adopt.

In the dust removal operation, the circulating wind may be heated by the heater 28 of the heater 23. By doing in this way, the fall of the dust from the said garment can be made favorable with drying of the said garment, for example, when the garment is wet with rain, and contains moisture, such as sweat.

On the other hand, in the dust removal operation, the heater 28 of the heater 23 for heating the circulating wind may be stopped or the amount of heat of heating of the heater 28 may be reduced than in the drying operation. In this way, power consumption can be lowered and energy can be saved.

In these respects, the heating by the heater 28 of the circulating wind in the dust removal operation may be made possible by the user's selection.

5-7 show the 2nd and 3rd Example (2nd and 3rd Embodiment) of this invention, the same code | symbol is attached | subjected to the same part as the said 1st Example, and description is abbreviate | omitted. Only the other parts are explained.

(Second embodiment)

In the second embodiment shown in Figs. 5 and 6, an electrostatic removing device 51 for removing static electricity from clothes during dust removal operation is provided. The static electricity removing device 51 is provided in, for example, the air blast tube 29 in the circulation ventilator 31. Specifically, the static electricity removing apparatus 51 is provided by the opening 52 formed in the middle portion of the air duct 29. 29 and the ventilation partition 54 which divides the inside of the pipe 53 into the air supply pipe 29 side and the air supply pipe 29 and the inside of the pipe 53 and the air supply partition wall 54, A blower 55 provided on the opposite side of the wind pipe 29, a needle electrode 56 provided on the opposite side of the air blowing pipe 29 of the ventilation partition 54, and a cylindrical ground electrode provided on the periphery thereof. It consists of (57).

In the above configuration, the high voltage E of high frequency kV is applied between the needle electrode 56 and the ground electrode 57 while operating the blower 55 during the dust removal operation. In doing so, inversion occurs between the needle electrode 56 and the ground electrode 57, and negative ions and positive ions are generated. This is sent by the blower 55 in the air supply pipe 29 as the wind generated, and included in the circulation wind. As a result, by eliminating the static electricity of the garment by neutralizing the charge of the static electricity on the garment, the removal of dust from the garment is improved. In addition, it is possible to prevent the dust that has fallen from the garment to be reattached to the garment, so that the dust can be removed more efficiently.

(Third embodiment)

In the 3rd Example shown in FIG. 7, the whole laundry dryer is made vertical. Specifically, in the outer box 61 corresponding to the outer box 1, an outer tub 62 having a cylindrical shape having a bottom corresponding to the outer tub 9 is installed in the longitudinal axis shape to the elastic support device 63. It is supported by the inner tank 62, and the inner tank 64 which consists of the same bottomed cylindrical shape equivalent to the said inner tank 11 is provided in the longitudinal axis shape. The inner tank 64 is provided with a large number of small holes 65 corresponding to the small holes 12 almost all over the main body part (only a part of them), and a rotary balancer 66 is attached to the upper inner peripheral part of the main body part. Moreover, only the stirring body 67 for washing | cleaning is provided in the lowest part in the inner tank 64. As shown in FIG.

A motor 68 corresponding to the motor 17 is provided in the outer lower portion of the outer tub 62. The motor 68 drives the inner tank 64 and the stirring body 67 to selectively rotate. In addition, a drain valve 69 corresponding to the drain valve 20 and a drain hose 70 corresponding to the drain hose 21 are also provided at an outer lower portion of the outer tank 62.

The outer side part of the outer tub 62 is provided with the bellows-shaped duct 71 which comprises the predetermined | prescribed air path corresponding to the said duct 30, for example. The duct 71 is connected to the air absorbing pipe 72 connected to the lower end of the outer tub 62 from the drain 72 of the outer tub 62 to the lower portion of the outer tub 62, and the upper end of the duct 71 from the upper side of the outer tub 62. It is connected to the air supply pipe 73 corresponding to the air supply pipe 29 facing the inside of the 62. The blower 74 corresponding to the blower 22 and the heater 75 corresponding to the heater 28 are provided inside the air supply pipe 73, whereby the circulation corresponding to the circulation ventilator 31 is circulated. The ventilation device 76 is configured.

A water supply valve 77 corresponding to the water supply valve 34 is provided above the air supply pipe 73, and a tip portion of the water injection connection tube 78 corresponding to the water injection connection tube 33 connected thereto is ducted. The water injection apparatus 79 corresponding to the said water injection apparatus 35 which inserts in the 71, and injects water into the duct 71 is comprised.

In addition, a cover 81 corresponding to the door 3 is provided on the top cover 80 mounted on the top of the outer box 61. Inside the front part of the top cover 80, an electronic unit 82 corresponding to the operation circuit unit 7 and the control circuit unit 8 is provided. Moreover, the operation panel 83 corresponded to the said operation panel 4 is provided in the upper surface of the front part of the top cover 80. As shown in FIG.

In the above configuration, operation is performed in the same manner as in the first embodiment (the point of washing and rinsing the laundry by the rotation of the stirring body 67 is different). Therefore, when a user puts clothing with dust such as pollen into the inner tank 64 and selects the "dust removal" course to start operation, a control device (not shown) moves the inner tank 64 to the motor 68. By operating the blower 74 while switching in the forward and reverse directions by rotating at a low speed, the air in the inner tank 64 is circulated through the circulation ventilator 76. At this time, by opening the water injection connection tube 78 side of the water supply valve 77, the water supplied from the water supply source such as tap water through the water supply valve 77 is ducted from the water injection connection tube 78. Water is injected in the direction opposite to the flow of air passing through it.

In addition, the vertical type laundry dryer may be provided with the static electricity removing device 51 of the second embodiment.

In addition, this invention is not limited only to the Example shown above and shown in the figure, It is obtained by changing suitably within the range which does not deviate from the summary.

According to the laundry dryer of the present invention, it is possible to remove dust attached to clothes without using a filter, and there is no problem that the removed dust is sucked back to a person or attached to clothes again, and the dust captured by the filter is removed. Can be removed without going through a human hand.

Claims (10)

In the laundry dryer provided with the outer tank and the inner tank, and has a function of washing the clothes of the inner tank and drying function, and during the drying operation to terminate the operation based on the detection result of the drying detection means, A circulation ventilation device for circulating air in the inner tank through a predetermined air passage during a drying operation; The air passage is provided with a water injection device for injecting water in a direction opposite to the flow of the circulation wind, The laundry dryer performs a dust removal operation for removing dust carried in the circulating wind circulated by the hand ventilating device with the flow of water injected by the water injection device while rotating the inner tank, and at the time of executing the dust removal operation. A laundry dryer characterized in that the termination is performed without depending on the drying detecting means. The method of claim 1, Washing dryer, characterized in that the dust removal operation is carried out in a dedicated course that can be selected by the user. The method of claim 1, Washing dryer, characterized in that the inner tank is rotated on the horizontal axis or inclined axis. The method of claim 1, During the dust removal operation, the laundry dryer characterized in that the water injected into the air passage is discharged out of the washing machine. The method of claim 1, And said circulation ventilator and said water injector serve both for drying operation. The method of claim 1, In the dust removal operation, the laundry dryer, characterized in that to increase the amount of the circulating wind than in the drying operation. The method of claim 1, And, during the dust removal operation, the rotational speed of the inner tank is lowered than during the drying operation, or the frequency of change of the rotation direction of the inner tank is increased than during the drying operation. The method of claim 1, Washing dryer, characterized in that during the dust removal operation, the circulation air is heated by a heater. The method of claim 1, And, during the dust removal operation, a heater for heating the circulating wind is stopped or a heating calorific value of the heater is reduced than in a drying operation. The method of claim 1, And a static electricity removing device for removing static electricity from clothes during the dust removing operation.

Images