JPS6029200A - Clothing dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotary drum type clothes dryer that dries clothes and other objects placed in a rotary drum, and uses a flat type motor. Well, it's a simplified structure.

Conventional Structure and Problems Conventional clothes dryers operate both the fan that blows dry air and the clothes storage cabinet that stores clothes and is rotatably supported by a single motor, which consists of pulleys and belts. Although it is driven via a power transmission mechanism, it has a complicated structure and an unavoidable increase in price, and has the drawbacks of increasing the size of the device.

The conventional structure of a clothes dryer equipped with a heat exchange type fan that integrates a drying fan and a cooling fan and has an air blowing function and a heat exchange function will be described with reference to FIGS. 1 and 2.

In the figure, reference numeral 1 denotes a clothing storage (hereinafter referred to as a drum) for storing clothing, which is rotatably supported. 2 is a dry side fan casing provided at the rear of the drum 1, with an intake port communicating with the drum 1 and an exhaust port communicating with the circulation duct 3, respectively.

4 is a heater cover equipped with a heating element 6 such as a heating element having a positive resistance-temperature characteristic;
It communicates with Then, the drum 1. Dry side fan casing2. The circulation duct 3 and the heater cover 4 form a dry air path for circulating dry air.

Reference numeral 6 designates a cooling side casing, which has a cooling air intake port 8 on the rear surface of the main body 7. By providing the exhaust port 9, a cooling air path is formed.

1o is a heat exchange type fan rotatably supported;
It consists of a wavy blade 13 in which grooves are arranged radially from the rotating shaft on the outside of the inner periphery plate 12, and an outer periphery plate 14 that supports the outer periphery of the wavy blade 12. 16 is a partition plate that separates two different types of air flowing on both sides of the blades 13 of the fan 10;
The gap with the outer periphery of ゜ is regulated to an extremely narrow dimension, forming a non-contact seal structure.

16 is a motor, and a fan rotating pulley 18 and a drum rotating pulley 19 are fixed to both ends of a motor shaft 17. The rotation of the motor 16 is transmitted to the heat exchange type fan 10 via the fan belt 20 and the fan boo 922, and is also transmitted to the drum 1 via the drum belt 21.

In the above configuration, when this clothes dryer is operated, the rotation of the motor 16 causes the fan rotating pulley 18, fan belt 20, fan pulley 22, etc. Since the fan 1o and the drum 1 are rotated by the drum rotation pulley 19 and the drum belt 21, the transmission mechanism becomes complicated, and an unbalanced load is generated in the radial direction on the bearing of the motor 16. It has disadvantages such as poor efficiency due to slip loss and unpleasant noise caused by sliding noise.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and aims to provide a clothes dryer that has a simple mechanism, good transmission efficiency, and low noise.

Structure of the Invention The clothes dryer of the present invention has an annular stator core and a toroidal winding wound thereon as a motor for driving a drum and a fan, and a pair of rotors facing the annular stator core. They are mounted on the same drive shaft, a fan is fixed to one of the rotors, and a drum is connected to the drive shaft via a speed reducer, thereby simplifying the transmission drive unit.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be explained based on FIGS. 3 and 4. In the figure, 1 to 10 are the same members as shown in FIG. 1, and their explanations will be omitted.

Reference numeral 23 denotes an axial gap type motor, which is fixed to a retaining plate 24 fixed to the main body 7. Reference numeral 26 denotes a speed reducer that reduces the shaft rotation speed of the axial gap type motor 23 from about 100 Or, p, m to about 5 Or, p, m, and transmits the rotation to the drum 1.

Next, the configuration of the axial gap type motor 23 is shown in FIG.

- annular stator core 26;
The stator frame 28 has toroidal windings 27 applied to multiple winding mounting slots formed radially with respect to the center on both sides of the stator frame 28, which are integrally molded with nonflammable thermosetting polyester resin or the like. is held by. A pair of rotors 29 and 30 mounted on the drive shaft 31 are provided on both sides of the annular stator core 26 so as to face each other. A fan 10 is fixed to the rotor 30. Further, the drive shaft 31 is rotatably supported by the stator frame 28 by a bearing 32. Further, the stator frame 28 is provided with a hole 23 for mounting the holding plate 24 thereon.

In the above configuration, the operation will be explained next. When clothes are placed in the drum 1 and the power is turned on, power is supplied to the motor 23 and the rotors 29 and 30 rotate.

The rotation of the rotor 30 causes the fan 10 fixed to the rotor 30 to rotate at approximately 1.000 r, p, m. Grade 13 has a blowing function and a heat exchange function, so dry air inside the drum 1 and cooling air outside the main body 7 are blown. At the same time, due to the rotation of the rotor 29.30, about 5 Or, p, m is transmitted from the drive shaft 31 via the reducer 26.
Drum 1 rotates.

Further, the heating element 5 is energized at the same time as the power is turned on, and the drying air accelerates the drying of the clothes, becomes hot and humid, and circulates through the drying air path. The heat exchange type fan 1° takes in cooling air from the intake port 8, cools the motor 23, and then cools the dry air on the blade 13 surface. Due to this action, moisture in the dry air is condensed and discharged to the outside of the main body 7.

Here, the axial gap type motor 23 has - annular stator cores 26 and toroidal windings 27 attached thereto, and rotates a pair of rotors 29 and 30 attached to the drive shaft 31. This improves the efficiency of the motor compared to conventional axial gap type motors, and the heat exchange type fan 10
The drum 1 is directly fixed to the rotor 30 and rotated, and the drum 1 is driven via a reducer 26 using gears, etc., so there is no belt loss as in the conventional case. Output can be reduced.

Furthermore, the thrust load caused by the magnetic attraction force, which is a drawback of conventional axial gap type motors, can be addressed by the pair of rotors 2.
By providing the bearing 9.30 opposite to the annular stator core 26, the thrust load can be offset, so that the bearing 32 can be made smaller and its durability can be improved, and the mechanism can be simplified.

Effects of the Invention As described above, according to the clothes dryer of the present invention, the fan is directly fixed to the rotor of the motor and rotated, and the drum is driven from the drive shaft of the motor via the reducer. By eliminating the belt loss, the motor can be made smaller and power consumption can be reduced at the same time.

Furthermore, since a pair of rotors are provided facing the annular stator core, the thrust load caused by the magnetic attraction force can be offset, resulting in a smaller bearing and significantly improved durability.

In addition, by fixing the fan directly to the rotor, the motor itself can be cooled at the same time as blowing air for blue drying, eliminating the need for a cooling fan for cooling the motor, which simplifies the transmission mechanism. The motor can be made smaller, lighter, and more durable. And since there is no fan belt like in conventional systems, there is no belt sliding noise that occurs during high-speed rotation, and the gear noise of the reducer is shielded by the fan and drum, which suppresses it to a low level, reducing noise during operation. It has an effect.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional clothes dryer, Fig. 2 is a perspective view of a heat exchange type fan, Fig. 3 is a sectional view of a clothes dryer according to an embodiment of the present invention, and Fig. 4 is its shaft. FIG. 2 is a cross-sectional view of a directional gap type motor. 1... Clothes drying cabinet (drum), 1Q fan, 23... Axial gap type motor, 26... Annular stator core, 27... Toroidal winding , 29
,30...rotor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (1)

[Claims] In addition to comprising a rotatably supported drum and a fan,
A motor is provided for driving the drum and the fan, and the motor has - annular stator cores and toroidal windings applied thereto, and the motor drives a pair of rotors facing the annular stator cores in the same way. The clothes dryer has a length that is attached to a shaft and fixes the fan to one of the rotors, and the drum is connected to the drive shaft via a speed reducer.