JPS6348560B2 - - Google Patents

Description

Detailed Description of the Invention The present invention provides a rotating drum type in which an intake fan is provided to take in air from the rear of the rotating drum, and hot air heated by a heating element is introduced into the rotating drum from the front side of the rotating drum by the intake air. The purpose is to prevent unheated air from being drawn into the rotating drum when the intake fan is activated, to prevent the temperature of the hot air from decreasing, to increase drying efficiency, and to prevent the heating element from being sucked into the dryer. By not reducing the amount of air that comes into contact with the heating element, abnormal temperature rise in the heating element can be prevented.

Embodiments of the present invention will be described below with reference to the drawings. In the figure, 1 is a front plate, 2 is a box body, which has flanges formed at the front and rear ends, is bent into a substantially U-shape as a whole, and has a separate plate in spot contact with the bottom. 3 is a back plate attached to the rear end of the box body 2. Reference numeral 4 denotes a rotating drum, which has an input port in the center of the front surface, and on the outer periphery of the input port, an edge 4a is formed so as to protrude forward, and a small hole 4b is formed around this edge 4a. At the same time, a plurality of convex portions 4c are formed inside the rotating drum 4. Furthermore, a plurality of small holes 4d are provided in the center of the rear surface of the rotating drum 4 at positions corresponding to the removable filter cover 5. Further, a drum shaft 6 is fixed to the center of the rear surface of the rotating drum 4, and at the same time, a receiving portion 7 of the filter cover 5 is fixed. The filter cover 5 has a spherical shape and has a grid-like hole. Further, inside the filter cover 5, an exhaust filter 8 is removably inserted in the form of a mesh.

A cylindrical packing 9 is fixed to the back wall of the drum 4 and is made of a material such as felt.

Reference numeral 10 denotes a drum support plate, which is fixed to the rear flange portion of the box body 2 in the transverse direction. A fan mounting plate 11 is fixed to the drum support plate 10, and a fan bearing 12 is fixed approximately at the center of the fan mounting plate 11. This fan bearing 12 pivotally supports a fan bearing 13, and rotatably supports an intake fan 14 fixed to this fan shaft 13.
Further, a fan pulley 15 is fixed to the fan shaft 13, a fan belt 16, and a motor pulley 1.
7 and is driven by a motor 18. An exhaust hole is formed in the fan mounting plate 11 and communicated with the exhaust port 19.

A fan case 20 houses the intake fan 14, and is airtightly fixed to the fan mounting plate 11 and the drum support plate 10. Further, a lattice-shaped hole is formed in the front face of the fan case 20, and a swivel bearing 21 for rotatably supporting the drum shaft 6 is fixed to the center of the hole. 22 is a drum receiving plate, which is locally attached to the front plate 1.
That is, it is mounted with a heat insulating gap provided between the front plate 1 and the front plate 1 by a plurality of convex boss portions 1a formed on the inner surface of the front plate 1.

The drum receiving plate 22 has an opening at a position corresponding to the input port of the rotary drum 4, and a flange 22a of this opening receives the edge 4a of the input port of the rotary drum 4 from the outside. A contact plate 23 for rotatably supporting the shaft is fixed. Further, an opening is formed in the front plate 1 at a position corresponding to the above-mentioned input port, and a packing 24 is formed on the periphery of the opening.
is arranged, and its central portion abuts against the back surface of the opening/closing lid 25 made of a transparent material to maintain airtightness.

26 is a heater support plate whose upper and lower ends are fixed to the lower end of the drum receiving plate 22 and the bottom of the box body 2 via an electrical insulating material 27, and an insulator 28 for supporting the heater.
Heater cover 30 with heater 29 attached via
is supported.

31 is a bracket for supporting the motor 18, 32
3 is a belt that transmits the rotation of the motor 18 to the rotating drum 4, and 33 is an idler pulley that provides tension to the belt 32. 34 is an intake filter, and 35 is an airtight packing.

A thermoswitch (not shown) is attached to the fan case 20, and controls opening and closing of electricity to the heater 29, which is a heating element, so that the temperature inside the rotating drum 4 does not exceed a certain temperature. In addition, the heater cover 30 is also provided with the motor 1 in order to prevent an abnormal temperature rise when the exhaust filter 8 becomes clogged.
A thermoswitch (not shown) is installed to stop power supply to the heater 8 and the heater 29 and to sound a buzzer.

Next, the relationship between the drum receiving plate 22, the front plate 1, etc. will be explained. As described above, the drum receiving plate 22 is locally supported on the front plate 1 by the convex boss portion 1a. The drum receiving plate 22 is coupled to the convex boss portion 1a with screws 36. In this coupled state, a gap A is created between the front plate 1 and the drum receiving plate 22, and when the intake fan 14 is operated, air that does not pass through the heating element enters the rotating drum through the gap A.

Therefore, a partition member 37 made of a flexible material such as felt is fixed to the flange 22a of the drum receiving plate 22 so as to partition this gap A. This partition member 37 rotatably supports the edge 4a of the rotary drum 4 similarly to the contact plate 23. Further, the end portion of the partition member 37 is brought into contact with or close to the front plate 1.

In the above configuration, the operation will be explained next.

In a configuration in which a plurality of convex boss portions 1a are formed on the front plate 1 to support the drum receiving plate 22 in adiabatic manner, there is a gap A between the front plate 1 and the drum receiving plate 22.
must occur. Since the air introduced into the rotating drum 4 through this gap A has not passed through the heating element, when this air is introduced into the rotating drum 4, the temperature inside the rotating drum 4 decreases, and ,
Since the intake air amount of the intake fan 14 is constant, the amount of air passing through the heating element decreases, causing the surface temperature of the heating element to rise. However, if the partition member 37 is arranged to partition the gap A as in the above configuration, the amount of air entering through the gap A is significantly reduced, and the thermal efficiency, drying time, and durability of the heater are significantly improved. Also, the dimension B between the backing plate 23 and the front plate 1
By adjusting the temperature, it is possible to adjust the temperature of the heating element and the operating temperature of the thermoswitch for preventing abnormalities.

As described above, according to the present invention, it is possible to reliably prevent air that cannot come into contact with the heating element from entering the rotating drum, thereby preventing a drop in the temperature of the hot drying air and improving drying efficiency. At the same time, since the amount of air that comes into contact with the heating element does not decrease, abnormal temperature rises in the heating element can be prevented. Furthermore, since the rotating drum is supported by a plurality of backing plates, smooth rotational movement can be obtained, and no overload is applied to the partitioning member, so that its function can be maximized.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a clothes dryer according to an embodiment of the present invention, Fig. 2 is a perspective view showing the connection structure between the front plate and the drum receiving plate, and Fig. 3 is a front view of the drum receiving plate. be. 1...Front plate, 2...Box body, 4...Rotating drum, 22
...Drum receiving plate, 22a...Flange, 37...Partition member.

Claims (1)

[Claims] 1 A clothes dryer that is provided with an intake fan that takes in air from the rear of the rotating drum, and that uses the intake air to introduce hot air heated by a heating element from the front side of the rotating drum into the rotating drum, and that houses the rotating drum. A drum support plate is locally supported by the front plate of the box body, and the drum support plate is provided with a flange provided with a plurality of contact plates that rotatably support the rotating drum,
Further, a partition member made of a flexible material is fixed between the contact plates of the flange, and the rotating drum side slides thereon, and the partition member partitions a gap between the front plate and the drum receiving plate. A rotating drum type clothes dryer characterized by the following configuration.