KR100291966B1 - Clothing drier - Google Patents

Abstract

The present invention relates to a clothes dryer, wherein an outer rotor is installed on a rear portion of an outer box so as to extend from side to side and positioned on both front and rear sides of the support 26 to drive the drum 16 in a direct drive manner. The drum drive motor 29 of the die type and the outer rotor fan drive motor 30 for driving the heat exchange fan 23 in a direct drive manner are installed coaxially, and the drum 16 The drum shaft 19 connected to the rear surface of the fan is supported by the bearing 21 of the fan casing 20 and the bearing 27 of the support 26, and the rear end thereof is connected to the rotor 32 of the motor 29. The inner peripheral edge portion of the heat exchange fan 23 is connected to the outer circumferential end of the rotor 34 of the motor 30 and the cylindrical portion 34c is formed at the portion through which the drum shaft 19 in the center of the rotor 34 penetrates. And the moisture-proof packing 37 and the bearing (3) in the cylindrical portion 34c. And 8) to eliminate or reduce the belt sliding sound so as to achieve a silent sound.

Description

Clothes Dryer {CLOTHING DRIER}

The present invention relates to a clothes dryer having an improved structure for driving a drum and a heat exchange fan.

11 shows a configuration of a conventional clothes dryer. In the outer box 1 of the clothes dryer, a drum 2 in which clothes are accommodated is rotatably installed, and a heat exchange fan of a dehumidifier combined use is provided in a casing 3 on the back side of the drum 2. 4) is rotatably installed. In addition, a biaxial induction motor 5 is provided at the inner bottom of the outer box 1 as a driving source of the drum 2 and the heat exchange fan 4.

In this case, a belt 7 is interposed between the pulley 6 attached to one shaft 5a of the motor 5 and the outer periphery of the drum 2. In addition, the belt 9 is interposed between the pulley 8 attached to the other shaft 5b of the motor 5 and the pulley 4a provided on the heat exchange panel 4. In this case, when the motor 5 is driven to rotate, the drum 2 is rotated through the belt 7 and the heat exchange fan 4 is rotated through the belt 9. It is also provided to install two induction motors at the bottom in the outer box 1 instead of one motor 5, thereby rotating the drum 2 and the heat exchange fan 4 through the belt transfer mechanism, respectively. It is becoming.

However, in a structure in which the belt driving method is employed in the mechanism for rotating the drum 2 or the heat exchange fan 4 as described above, the operation sound generated by the sliding of the belts 7 and 9 becomes a noise. There was this. In addition, there is a problem that a failure occurs due to the belts 7 and 9 being pulled out or the wear of the belts 7 and 9 during transportation.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a clothes dryer which can achieve quietness by eliminating or reducing the belt driving method for driving the drum and the heat exchange fan.

1 is an enlarged vertical sectional side view of a main part of the present invention showing a first embodiment;

Figure 2 is a longitudinal side view of the clothes dryer,

Figure 3 is an exploded perspective view showing a connection structure of the drum shaft,

Figure 4 is an enlarged longitudinal sectional side view showing the configuration of the moisture-proof packing portion,

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

Figure 6 corresponds to Figure 1 showing a third embodiment of the present invention,

7 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention;

8 is a view corresponding to FIG. 1 showing a fifth embodiment of the present invention;

9 is a view corresponding to FIG. 2 showing a sixth embodiment of the present invention;

10 corresponds to FIG. 2 showing a seventh embodiment of the present invention, and

FIG. 11 is a diagram corresponding to FIG.

* Explanation of symbols for the main parts of the drawings

11: outer box 15: distribution

16: drum 18: seal member

19,56,63,85: Drum shaft 20: Fan casing

21,27: bearing 23,66,83: heat exchange fan

23a: Abacus 26, 71, 81: support

29,82: motor for drum drive 30,72: motor for fan drive

32, 34, 54: rotor 37: moisture proof packing

38: bearing bearing 41,42: spherical bearing

51, 61: drum driving motor 62: fan driving motor

74: planetary gearbox (reduction mechanism) 84,91: induction motor

The clothes dryer of claim 1 is provided with a drum in which outer clothes are accommodated, a drum driving motor for rotating the drum, a heat exchange fan provided on the rear side of the drum, and a rotation drive of the heat exchange fan. In the provision of a fan drive motor, the drum drive motor or the fan drive motor may be configured by a direct drive method and installed on a support of the rear portion of the outer box.

According to this, either the drum drive motor or the fan drive motor does not go through the belt transmission mechanism but rotates the drum or the fan by the direct drive method, so that the belt transfer mechanism becomes unnecessary, and furthermore, the sound of sliding of the belt. Can be reduced.

The clothes dryer of claim 2 is installed in an outer box and accommodates a drum, a heat exchange fan installed on a rear side of the drum, and a support of a rear part of the outer box, and directs the heat exchange fan to a direct drive method. At the same time as the rotation drive, characterized in that it comprises a motor for rotating the drum through the reduction mechanism.

According to this, a heat exchange fan is rotationally driven by a motor by the direct drive system, and the driving force of the motor is transmitted to the drum through the reduction mechanism, and the drum is rotationally driven. At this time, since the belt transmission mechanism becomes unnecessary, the sliding sound of the belt can be eliminated, and both the drum and the heat exchange fan can be driven by one motor.

The clothes dryer according to claim 3 of the present invention is provided with a drum in which outer clothes are accommodated, a drum driving motor for rotating the drum, a heat exchange fan provided on the rear side of the drum, and a rotation drive of the heat exchange fan. In the case having a fan driving motor, both the drum driving motor and the fan driving motor are configured by a direct drive method and installed on a support of the rear portion of the outer box.

According to this, a drum is rotationally driven by the drum drive motor by a direct drive system, and a heat exchange fan is rotationally driven by a fan drive motor by a direct drive system. At this time, since the belt transmission mechanism becomes unnecessary, the sliding sound of the belt can be eliminated.

Here, it is preferable that the above-described direct drive type motor is constituted by an outer rotor type motor having high torque and high rotational stability (invention of claim 4). When both a drum drive motor and a fan drive motor are used as direct drive methods, one can be configured as an outer rotor type motor and the other can be configured as an inner rotor type motor (the invention of claim 5). Compared to the case where all of them are outer rotor type, the configuration in the case where the two motors are installed on the support can be easily completed.

In addition, the fan drive motor may be configured as an outer rotor type motor, and a heat exchange fan may be integrally installed on the rotor of the motor (invention of claim 6), thereby simplifying the configuration of the heat exchange fan and the fan drive motor. Work becomes easy. The heat exchange fan can be configured to have a shape in which the center is opened, and the fan drive motor is arranged in the inner circumferential portion of the opening (invention of claim 7), thereby simplifying the configuration of the heat exchange fan and the motor for driving the fan. At the same time, it can be made thin in the axial direction.

In the case where both the fan drive motor and the drum drive motor are configured by the direct drive method, the two motors are provided coaxially with respect to the drum shaft provided on the rear of the drum (invention of claim 8), or The stator of the motor can be configured to be attached to both front and back surfaces of the support, respectively (the invention of claim 9), thereby enabling the two motors to be arranged compactly.

By the way, when the rotor of the fan driving motor is configured to slide the drum shaft provided on the back of the drum, when the air containing a lot of moisture discharged to the back of the drum enters the fan driving motor, it adversely affects the motor. There is a case. Therefore, when the moisture proof packing is provided in the sliding part of the rotor and drum shaft of a fan drive motor (invention of Claim 10), it can prevent that air containing a lot of moisture penetrates into a motor.

In addition, when one of the drum drive motor and the fan drive motor, which is a direct drive method, is configured as the outer rotor type motor and the other as the inner rotor type motor, the fan driving motor is configured as the inner rotor type motor and the drum The drive motor can be constituted by an outer rotor type motor (invention of claim 11), whereby a sufficient torque when the drum is rotated can be obtained.

Moreover, the drum shaft provided in the back of a drum can be set as the structure supported by the spherical bearing (invention of Claim 12). As a result, high supporting strength of the drum shaft can be obtained, the load on the bearing on the front end side of the drum can be reduced, and the drum supporting structure can be simplified.

Hereinafter, some embodiments of the present invention will be described with reference to FIGS. 1 to 10.

(1) First embodiment

First, a first embodiment of the present invention (corresponding to claims 3, 4, 7, 8, 9, and 10) will be described with reference to FIGS.

2 shows the configuration of the clothes dryer according to the present embodiment. Thus, the outer box 11 of the clothes dryer forms a rectangular shape as a whole, and a circular clothing entrance 12 is installed at the center of the front portion (left side in the drawing), and the opening and closing of the clothing entrance 12 is performed. The door 13 is provided. Moreover, the operation panel 14 located in the lower part of the said door 13 is provided in the front part of the outer box 11. Moreover, the opening part of the back side of the outer box 11 is comprised so that it may be closed by the back board 15. As shown in FIG. Although not shown, the exhaust plate 15 is provided with external air inflow holes and exhaust holes.

The outer box 11 is provided with a drum 16 for receiving clothes. The drum 16 has a cylindrical shape in which the front side is opened except for the outer circumference, and the edge portion of the front opening is provided at the front side in the outer box 11 or the ring-shaped seal is provided on the ring-shaped drum support 17. The member 18 is slidably supported. On the other hand, as described in detail later, the drum shaft 19 is attached to the rear center portion of the drum 16 and the drum shaft 19 is mounted on the fan casing 20 provided on the rear side of the drum 16. Supported by 21.

In this case, the drum 16 is rotatably installed about an axis extending in the front-rear direction, and is configured to be rotationally driven by a drive mechanism described later. In addition, a plurality of vents 16a (shown in FIG. 2) are formed in the peripheral portion of the drum shaft 19 on the rear side of the drum 16 so that the filter 22 is mounted to cover the inner surface side thereof. consist of. In addition, although not shown, the inner surface of the drum 16 is configured to have an antimicrobial sound absorption sheet.

In the fan casing 20, a heat exchange fan 23 serving as a dehumidifier is installed to partition the space between the back boards 15 back and forth. The heat exchange fan 23 is configured to have blowing blades 23b and 23c on both front and rear sides of the main plate portion 23a forming a so-called double wing shape and a disc shape having a central opening in a circular shape. At this time, the inlet port 20a (shown only in FIG. 2) is formed in the central portion of the fan casing 20. Although not shown, a duct is formed at the bottom of the outer box 11 to connect the front side (inside air side) of the fan casing 20 and the hot air jetting holes formed in the drum support 17. It is installed.

At this time, the heat exchange fan 23 is rotationally driven by a driving mechanism described later so that air in the drum 16 is sucked into the fan casing 20 through the air vent 16a and the inlet 20a and heated through the duct. The circulation supplied to the drum 16 from the hot air jet port is performed. At the same time, at the back side (external air side) of the heat exchange fan 23, a relatively low temperature outside air flows in from the outside air outlet of the exhaust plate 15 to be discharged from the exhaust port, thereby forming a heat exchange fan 23. Circulated air flowing through the front side of the cooling) is made to dehumidify.

In addition, as shown in FIG. 1, the periphery of the air intake port 20a on the front surface of the fan casing 20 surrounds the outer periphery of the air vent of the drum 16 to make sliding contact with the rear surface of the drum 16. While the sealing material 24 is provided, the hollow packing 25 is provided in the outer surface side of the sealing material 24. In this case, the vent 16a of the drum 16 and the inlet 20a of the fan casing 20 are hermetically communicated.

In addition, as shown in FIG. 2, a so-called labyrinth structure is formed between the outer circumferential edge of the heat exchange fan 23, the plate part 23a), and the fan casing 20, so that leakage of air is prevented.

In addition, the structure of the drive mechanism part which rotationally drives the said drum 16 and the heat exchange fan 23 is demonstrated with reference to FIG. 1, FIG. 3, and FIG. As shown in FIG. 1 and FIG. 2, the back part (inside of the back board 15) in the outer box 11 is provided with the support stand 26 extended so that it may be located in the up-down direction middle part, and may be extended to right and left. Thus, as described above, the drum shaft 19 connected to the rear portion of the drum 16 extends to the rear side through the center of the support 26 in a state supported by the bearing 27 provided on the support 26. .

In this case, the drum shaft 19 is connected to the drum 16 as shown in Figs. That is, at the front end of the drum shaft 19, the hexagonal convex portion 19a is integrally provided with a length smaller than the diameter of the drum shaft 19 and corresponding to the thickness of the back portion of the drum 16, The screw hole 19b is formed in the convex part 19a. In contrast, a hexagonal hole 16b corresponding to the convex portion 19a is formed at the center of the rear portion of the drum 16. The drum shaft 19 inserts the convex portion 19a into the hexagonal hole 16b and tightens and attaches the screw 28 through the washer to the screw hole 19b from the inside of the drum 16. It is fixedly attached so that it does not fall out with respect to rotation.

1 and 2, a drum driving motor 29 for rotating the drum 16 is installed on the support 26, and a fan for rotating the heat exchange fan 23 is provided. The motor 30 is installed. In this embodiment, both the drum drive motor 29 and the fan drive motor 30 are configured to drive the drum 16 and the heat exchange fan 23 in a direct drive manner and are constituted by an outer rotor type blushless motor. It is. The drum drive motor 29 and the fan drive motor 30 are located on both front and rear sides of the support 26 and are coaxially provided with respect to the drum shaft 19.

That is, as shown in FIG. 1, the stator 31 of the drum drive motor 29 is comprised by winding the winding 31b around the stator core 31a attached to the back side of the said support stand 26. As shown in FIG. On the other hand, the rotor 32 of the drum drive motor 29 forms a thin cylindrical container shape of which the front side is opened, and opposes the magnet 32a with a gap in the outer circumference of the stator 31 on its inner circumferential surface. It is composed with). The center of the rotor 32 is connected to the rear end of the drum shaft 19. In this case, the drum driving motor 29 is configured to drive the drum 16 directly through the drum shaft 19.

On the other hand, the fan drive motor 30 has a stator 33 formed by winding a winding 33b around the stator core 33a attached to the rear side of the support 26, and forms a thin cylindrical container with the rear side opened. The rotor 34 which has the magnet 34a in the inner peripheral surface is comprised. As shown in FIG. 4, the flange portion 34b formed at the outer circumferential end portion of the rotor 34 is part of the inner circumferential edge portion of the heat exchange fan 23. It is screwed and connected by the screw 36 through (). In this case, the fan drive motor 30 is disposed in the inner circumferential portion of the opening of the heat exchange fan 23, the plate part 23a, and is configured to drive the heat exchange fan 23 directly.

In this case, the drum shaft 19 is rotatably penetrated at the center of the rotor 34 of the fan driving motor 30, but as shown in FIG. 4, the drum shaft 19 is formed on the rotor 34. The through portion of the cylindrical portion 34c is provided to surround it. In the cylindrical portion 34c, a moisture-proof packing 37 made of a lip seal positioned at the front side and slidingly contacting the drum shaft 19 is provided, and at the rear side thereof, two ring-shaped sintered metals are provided. The containing bearing 38 which has the oil soaking stand 38b between the 38a is provided. In this case, the moisture-rich air in the fan casing 20 is prevented from entering the fan driving motor 30.

Next, the operation of the above configuration will be described. Now, when the user starts the drying operation by operating the operation panel 14, for example, in the state where the clothes after washing are accommodated in the drum 16, the drum drive motor 29 and the control circuit (not shown) and Electric current is supplied to the fan driving motor 30, the heater, and the like. As a result, as described above, the drum 16 is rotationally driven so that the clothes inside are agitated, and the heat exchange fan 23 is rotationally driven to circulate the hot air while dehumidifying the drum 16. To dry.

At this time, since the drum 16 and the heat exchange fan 23 are driven in a direct drive manner by the motors 29 and 30, respectively, it is possible to eliminate the need for a belt transmission mechanism as in the prior art, which has been a problem in the past. The sliding sound of the belt can be eliminated. It goes without saying that the belt may not come off during transportation or cause a failure due to the wear of the belt. In addition, the drum 16 and the heat exchange fan 23 can be individually controlled in speed, and the drum 16 can be reversed freely.

In this embodiment, since a high torque is obtained for the drum drive motor 29 and the fan drive motor 30 and an outer rotor type motor having high rotational stability is employed, the large and heavy drum 16 is used. Subsequently, the rotational drive is stably driven, and low-speed rotation control, which has not been possible in the past, is also possible. In addition, the outer rotor-type motors 29 and 30 can be configured relatively thin in the axial direction, and the motors 29 and 30 are located on both front and rear sides of the support 26 to surround the drum shaft 19. In the axial direction as a whole of the drive mechanism by the study of the arrangement of the motors 29 and 30, which are installed in a coaxial shape and in which the fan driving motor 30 is located in the inner circumference of the heat exchange fan 23. It wasn't quite large and could be installed compactly.

In addition, since the moisture-proof packing 37 and the containing bearing 38 are provided in the portion through which the drum shaft 19 of the rotor 34 of the fan driving motor 30 penetrates, it is sucked into the fan casing 20. Air containing a lot of moisture penetrates into the fan driving motor 30 and into the drum driving motor 29 to adversely affect the windings 31b and 33b and the like.

Thus, according to this embodiment, since the drum 16 and the heat exchange fan 23 are driven by the direct drive method by the motors 29 and 30, the belt drive method can be eliminated and the silence can be achieved. Excellent effect can be obtained. In particular, in the present embodiment, the drum drive motor 29 and the fan drive motor 30 are configured as an outer rotor type motor, and various arrangements have been made to the arrangement structure. ) Is relatively simple and can be installed with compactness.

(2) Second Example

Fig. 5 shows the correspondence to the second embodiment of the invention (claims 3,4,7,8,9,10,12). This embodiment differs from the first embodiment in that the spherical bearing (ball bearing) 41 replaces the bearing 21 (sliding bearing) made of plastic as a bearing for supporting the drum shaft 19 on the fan casing 20. ) Is adopted. In addition, the front end side of the drum shaft 19 is also supported by the support stand 26 via the spherical bearing 42 here. The rest of the configuration is equivalent to that of the first embodiment.

According to such a configuration, the same effects as those of the first embodiment can be eliminated, the belt driving method can be eliminated, and the silence can be achieved. The drum shaft 19 is supported by the spherical bearings 41 and 42 to obtain a high supporting strength of the drum shaft 19, so that the bearing portion on the front end side of the drum 16 (seal member) 18)) is a light load, it is possible to simplify the support structure of the drum (16).

(3) Third Example

Figure 6 shows a third embodiment of the invention (corresponding to claims 3, 5, 6, 7, 8 and 10). In this embodiment, the fan support motor 30 made of the same outer rotor type motor as the first embodiment is installed on the front side of the support 26 on the rear side of the outer box 11, and at the same time, the support 26 is provided. The drum driving motor 51 which consists of an inner rotor DC motor is provided in the back side of the.

The drum driving motor 51 has a magnet 53 on the inner circumferential surface of the cylindrical motor frame 52 and a rotor 54 formed by winding a winding 54b around the rotor core 54a. It is provided with. And the bracket 55 of the front surface of the said frame 52 is attached to the said support stand 26, for example by screwing. At this time, the rotating shaft which is connected to the rotor 54 and extends forward through the bracket 55 becomes the drum shaft 56 as it is, and its front end is connected to the drum 16, so that the drum 16 Rotational drive is made by direct drive method.

In the above embodiment, the heat exchange fan 23 is integrally installed in the rotor 34 of the fan driving motor 30. In this case, the flange part 34e of the rotor 34 is insert-molded in the form filled in the inner peripheral part of the main plate part 23a of the heat exchange fan 34. As shown in FIG. The rest of the configuration is equivalent to that of the first embodiment.

According to such a configuration, the belt driving method can be eliminated and the quietness can be achieved as in the first embodiment. In addition, since the drum drive motor 51 is configured as an inner rotor type motor, the configuration in which the motors 30 and 51 are mounted on the support base can be easily completed as compared with the case where both motors are formed as the outer rotor type. have. Moreover, since the heat exchange fan 23 is integrally provided in the rotor 34 of the fan drive motor 30, the configuration of the heat exchange fan 23 and the fan drive motor 30 is simplified, and the assembly work is performed. It can be easily.

(4) Fourth Example

7 shows a fourth embodiment (corresponding to claim 11) of the present invention. In this embodiment, the drum drive motor 61 made of the outer rotor type motor is provided on the front side of the support 26 on the rear side of the outer box 11, and at the same time, the inner side of the back of the support 26 is provided. A fan drive motor 62 made of a rotor-type DC motor is provided.

At this time, the drum shaft 63 connected to the rear center portion of the drum 16 is rotatably supported by the fan casing 20 through the bearing 21, and the rear end thereof has a rotor (of the drum driving motor 61). Connected to the center of In this case, the drum 16 is driven to rotate in a direct drive manner by the drum drive motor 61.

On the other hand, the fan drive motor 62 has a magnet 53 on the inner circumferential surface of the motor frame 52 similarly to the drum drive motor 51 of the third embodiment, and also has a rotor core. The rotor 54 is formed by winding the winding 54b at 54a, and a bracket 55 is attached to the support 26. As shown in FIG. The front end side of the rotating shaft 65 connected to the rotor 54 and protruding in both front and rear sides is rotatably supported by the bearing 27 provided on the support 26, and the rear end of the rotating shaft 65 is connected to the heat exchange fan 66. It is connected to the center. In this case, the cylindrical portion 66a is integrally provided at the center of the heat exchange fan 66.

According to such a configuration, the same effects as in the first embodiment can be achieved, for example, to silence the belt driving method. The drum 16 needs to have a larger torque than the heat exchange fan 66. However, since the drum drive motor 61 is formed of an outer rotor type motor, the drum 16 can be rotated. The advantage is that you get enough torque at that time.

(5) Fifth Example

8 shows a fifth embodiment of the present invention (corresponding to claims 2, 4 and 7). In this embodiment, a fan driving motor 72 made of an outer rotor type motor is provided on the support 71 on the rear side of the outer box 11. The heat exchange fan 23 is attached to the flange portion 73a of the outer circumference of the rotor 73 of the fan drive motor 72 so that the heat exchange fan 23 is driven in a direct drive manner.

Then, the rotational force of the fan driving motor 72 is transmitted to the drum 16 through the planetary gear device 74, which is a reduction mechanism provided on the rear side of the drum 16. That is, the shaft 75 is attached to the center part of the rotor 73 of the fan drive motor 72. The shaft 75 is supported by the bearing 21 of the fan casing 20 and extends forward, and the sun gear 76 is fixedly attached to the front end thereof. Moreover, the 2nd sun gear 77 is being fixed to the front side of the fan casing 20 so that the said sun gear 76 may be enclosed.

On the other hand, four shaft parts 78 (only two are shown) are provided in the back part of the said drum 16, for example, and the planetary gear 79 is provided in each shaft part 78, respectively, 79 is meshed with the solar gear 76 and the second solar gear 77. At this time, the number of teeth and the like are set so that the ratio of the rotational speed of the drum 16 and the heat exchange fan 23 is about 1:15.

In this case, when the fan drive motor 72 is rotationally driven, the heat exchange fan 23 is rotated, and the drum 16 is rotated by the planetary gear device 74. According to such a structure, a belt drive system can be eliminated and silence can be aimed at. In addition, since both the drum 16 and the heat exchange fan 23 can be driven by one motor 72, the configuration can be simplified and can be made more compact.

(6) Sixth Example

9 shows a sixth embodiment (corresponding to claims 1, 4) of the present invention. In this embodiment, the drum 16 is rotationally driven by a direct drive method by an outer rotor-type drum driving motor 82 provided on the rear side of the support 81 on the rear side in the outer box 11. The heat exchange fan 83 is configured to rotate through a belt transfer mechanism by an induction motor 84 provided at the bottom of the outer box 11 as in the prior art.

At this time, the drum shaft 85 connected to the rear surface of the drum 16 is rotatably supported by the fan casing 20 through the bearing 21, and at the same time, the bearing 86 installed at the center of the heat exchange fan 83 is supported. It is rotatably supported and extended rearward, and its rear end side is connected to the rotor 87 of the drum drive motor 82 configured in the same manner as in the first embodiment. In this case, the drum 16 is driven by the drum drive motor 82 in a direct drive manner.

On the other hand, the heat exchange fan 83 is rotatably supported around the drum shaft 85 by the bearing 86. At this time, the drum shaft 85 is provided with a fixing ring 88 for preventing the positional shift of the heat exchange fan 83 in the axial direction. The belt 89 is interposed between the pulley 83a provided on the rear side of the center of the heat exchange fan 83 and the pulley 84a attached to the rotation shaft of the induction motor 84. In this, the rotational force of the induction motor 84 is transmitted through the belt 89 so that the heat exchange fan 83 is rotated.

According to such a structure, since the drum 16 which was rotationally driven by the belt transfer mechanism conventionally was made to rotate-drive by a direct drive system, the belt transfer mechanism becomes unnecessary by that much. Therefore, it is possible to reduce the sliding sound of the belt by that much and to achieve the quieting.

(7) Seventh Example

Fig. 10 shows a seventh embodiment (corresponding to claims 1, 4) of the present invention. In this embodiment, the heat exchange fan 23 is rotationally driven in a direct drive manner by an outer rotor fan driving motor 30 provided on the front side of the support 26 on the rear side in the outer box 11. , The drum 16 is rotated through the belt transfer mechanism by an induction motor 91 installed at the bottom of the outer box 11 as in the prior art.

At this time, the drum 16 is supported by the shaft 92 on the rear side thereof so as to be rotatably supported by the fan casing 20 through the bearing 93, and the pulley attached to the rotating shaft of the induction motor 91 ( The belt 95 hangs between 94 and the outer periphery of the drum 16. In this, the rotational force of the induction motor 91 is transmitted through the belt 95 so that the drum 16 is rotated.

On the other hand, between the fan casing 20 and the back plate 15, a shaft 96 extending in the front-rear direction is provided, and the rotor 34 of the fan driving motor 30 configured in the same manner as in the first embodiment is The shaft 96 is rotatably supported by the bearing 97. The heat exchange fan 23 is connected to the outer peripheral portion of the rotor 34. The heat exchange fan 23 is driven by the direct drive system by the fan drive motor 30 in this.

In such a configuration, the heat transfer fan 23 that has been rotationally driven by the belt transfer mechanism is configured to rotate by the direct drive method, and thus the belt transfer mechanism becomes unnecessary. Therefore, the sliding sound of the belt can be reduced by that much and the silence can be achieved.

In addition, the present invention is not limited to each of the above-described embodiments. For example, the outer rotor type motor is not limited to a radial gap type, but may also be an axial gap type. It can be carried out by changing suitably in the range which does not deviate from the summary, such as the borrowing.

As described above, according to the clothes dryer of the present invention, since the drive motor of the drum in which the clothes are accommodated or the drive motor of the heat exchange fan installed on the rear side of the drum are configured by the direct drive method, It has an excellent practical effect that the silent operation can be achieved by eliminating or reducing the belt driving method for driving.

Claims (12)

A drum installed in the outer box and accommodating the clothes; A drum drive motor for rotating the drum; A heat exchange fan installed on a rear side of the drum; And a fan driving motor for rotationally driving the heat exchange fan, wherein either the drum driving motor or the fan driving motor is configured in a direct drive method and installed on a support of the rear portion of the outer box. Clothes dryer. A drum installed in the outer box to accommodate clothing; A heat exchange fan installed on a rear side of the drum; And a motor installed on a support of the rear portion of the outer box to rotate the heat exchange fan by a direct drive and to rotate the drum through a low speed mechanism. A drum installed in an outer box and containing clothing; A drum drive motor for rotating the drum; A heat exchange fan installed on a rear side of the drum; And a fan driving motor for rotationally driving the heat exchange fan. And both the drum driving motor and the fan driving motor are configured in a direct drive method and installed on a support of the rear part of the outer box. The method according to any one of claims 1 to 3, The direct drive motor of the clothes dryer, characterized in that consisting of an outer rotor type motor. The method of claim 3, wherein A clothes dryer characterized in that one of the drum drive motor and the fan drive motor is configured as an outer rotor type motor and the other as an inner rotor type motor. The method according to any one of claims 1, 2, 3 and 5, A fan driving motor is an outer rotor type motor, and at the same time, a heat exchange fan is integrally installed on the rotor of the motor, the clothes dryer. The method according to any one of claims 1, 2, 3 and 5, The heat exchange fan is configured to have a shape in which the center is opened, the fan dryer motor is disposed in the inner peripheral portion of the opening. The method according to claim 3 or 5, The drum driving motor and the fan driving motor are provided in a coaxial shape with respect to the drum shaft provided on the rear of the drum. The method according to claim 3 or 5, A stator of a fan driving motor and a drum driving motor is attached to each of front and rear surfaces of a support, respectively. The method according to claim 3 or 5, A rotor of a fan driving motor is configured to slide a drum shaft provided on a rear surface of a drum, and a moisture-proof packing is installed on the sliding portion thereof. The method of claim 5, The fan driving motor is made of an inner rotor type motor, and the drum driving motor is an outer rotor type motor. The method according to any one of claims 1, 2, 3, 5 and 11, Clothes dryer, characterized in that the drum shaft provided on the back of the drum is supported by a spherical bearing.