JP2737460B2 - Clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum front bearing which is a drying chamber of a clothes dryer, and more particularly to an airtight method.

[0002]

2. Description of the Related Art In a conventional drum front bearing portion, a plurality of sliding members are provided on an outer peripheral upper portion of a drum supporting plate, and the drum is rotatably supported by the sliding members. It is configured so as to block the leakage of the humid air while attaching the felt for use and rotating the drum and the drum support plate. This will be described in detail with reference to FIGS. The sliding member 27 (length 40, width 8.5, thickness 2.
5) Attach the three pieces to the place where the load of the drum 7 is applied. Apply an airtight felt 28 (600 g / m ² of polyester having a width of 13 and a thickness of 2.1) to the entire inner circumference of the bearing, and apply an airtight felt to the outer circumference of the bearing 29 (Polyester 3, width 6, thickness 3.0)
00g / m ² ) as the drum support plate bakumi, and the outer frame 1
Fixed to Thereafter, the drum 7 is inserted and assembled from the rear. The bearing dimensions after assembling are such that the airtight felt 29 is assembled in a compressed state of 0.4 mm between the drum supporting plate 5 and the drum 7, and is sealed so that moist air and cotton dust from the inside of the drum 7 do not leak. The airtight felt 28 has a gap of 0.5 mm between the drums 7, and this gap is designed for ease of assembly so that the drum 7 can be smoothly inserted into the drum support plate. However, when the filter 19 is dried in a clogged state, the gap between the drum 7 and the airtight felt 28 (0.
5 mm), cotton dust enters and accumulates. When the accumulated cotton dust fills the gap, the dust moves in the rotating direction and forms a ball, and the biting drum 7 locks between the drum 7 and the airtight felt 28, and cannot rotate and cannot be dried. As described above, the conventional front bearing configuration lacks reliability.

[0003]

In the above-mentioned prior art, during drying, cotton dust enters between the airtight felt 28 of the front bearing sliding portion and the drum 7 and accumulates, and the accumulated cotton dust fills the gap. Then, the drum 7 moves in the rotation direction and becomes a ball shape, bites between the drum 7 and the airtight felt 28, and the drum 7 is locked and cannot be rotated. As described above, the conventional front bearing configuration lacks reliability.

An object of the present invention is to provide an airtight felt 28 and a drum 7 which serve as an entrance of dust to the front bearing sliding portion during drying.
By installing the airtight felt 28 in a compressed state between the drum support plate 5 and the drum 7 so that dust does not enter between the drum support plate 5 and the clothes drying having a reliable front bearing without the drum being locked. To provide machines.

[0005]

SUMMARY OF THE INVENTION The purpose of the present invention is to provide an airtight felt 28 which, during drying, provides an entrance for dust into the front bearing slides.
The density (g / m ³ ) is reduced, and the thickness is increased to increase the flexibility. After the assembly, the airtight felt 28 makes the drum support plate 5 and the drum 7 rotatable, and This is achieved by being incorporated in a compressed state between the drums 7.

[0006]

The airtight felt 28 is provided between the drum support plate 5 and the drum 7
The drum slides in a compressed state. However, to prevent the sliding resistance from becoming larger than before, the airtight felt 28
In order to reduce the density (g / m ³ ) and make it the same as the conventional sliding resistance, no problem occurs.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

First, the structure of the dryer will be described. Outer frame 1
The back lid 2 is fixed to the back side of the. A clothing inlet 3 formed on the front of the outer frame 1 and a door 4 for opening and closing the entrance of the clothing inlet 3 are located on the front of the outer frame 1, and are supported by a metal annular drum fixed to the outer frame 1. A drum 7 serving as a drying chamber is rotatably supported by a rear bearing 6 disposed at the rear of the plate 5 and the outer frame 1. The sliding between the drum supporting plate 5 and the drum 7 is performed by rotatably supporting three sliding members 27 made of Teflon having a small sliding resistance on a portion of the drum supporting plate 5 where the load of the drum 7 is applied. ing. Also, in order to keep the bearing part airtight, an airtight felt (300 g / m of polyester) is used.
³ t3) is affixed to the drum support plate 5, and is assembled in a state where the gap between the drum support plate 5 and the drum 7 is compressed by 0.5 mm to a gap width of 2.5 mm. The compression force is kept as low as 10 g / cm ² and does not affect the sliding of the drum 7.
It will be a small drag. On the rear surface of the drum 7, a hot air outlet 8 composed of a number of holes is formed. A circulation path 10 is formed to communicate with a hot air inlet 9 formed at a lower portion of the drum support plate 5 from a vent 12 of a fan casing 11. A honeycomb-shaped heater 13 made of a positive temperature coefficient thermistor is provided opposite to the hot air inlet 9 and housed in an L-shaped duct 14 fixed to the drum support plate 5. In the fan casing 11, a heat exchange type double-sided fan 16 is rotatably supported by a rear bearing 6 via a metal. A motor 18 is provided in the upper portion of the outer frame 1 to rotate the drum 7 by an idler pulley and a belt 24 and to rotate the double-sided fan 16 by a pulley belt. Lint filter 19 installed from inside to cover hot air outlet 8 of drum 7
Is attached. A temperature sensor 20 composed of a thermistor and a humidity sensor 22 are provided at a position facing the hot air outlet 8 of the fan casing 11 in the circulating air passage so as to detect a change in the state of dry air. For this purpose, a temperature sensor 21 composed of a thermistor is attached to the cooling air inlet 2a of the back lid 2. A controller 25 for performing a series of drying operations is arranged. An operation unit 26 is arranged on a front surface of the outer frame 1.

The operation will be described below. When the operation is performed, first, the door 4 is opened and the dehydrated clothes are stored in the drum 7, the power supply (not shown) is turned on, and the motor 18 and the heater 13 are turned on.
And the drum 7 rotates at a low speed.
6 rotates at high speed. The air in the circulation path 10 is supplied to the heater 13.
And is sucked into the drum 7 from the hot air inlet 9 as high-temperature dry air. The high-temperature dry air sent into the drum 7 comes into contact with the clothes in the drum 7 and promotes the evaporation of moisture contained in the clothes, and becomes high-temperature, high-humidity air.
After the cotton dust is collected in step 9, the outside air sucked from the cooling inlet 2a of the back cover 2 into the double-sided fan 16 in the fan casing 11 is cooled to a temperature lower than the dew point temperature and condensed on the circulation path side of the double-sided fan 16. This produces water. The generated condensed water is discharged out of the machine through a drain port 15 of the circulation path 10. The circulating air that has lost a part of the moisture when passing through the two-sided fan 16 becomes dehumidified air, and the heater 1 provided in the L-shaped duct 14
After being heated by 3, it is sent again into the drum 7 as high-temperature dry air, and is used for drying clothes. During this drying process, the front bearing part is attached to the drum supporting plate 5 by the sliding member 27,
Three, Bukumi a portion consuming load of the drum 7 of the drum support plate 5, sliding resistance is reduced rotatably supported, also gas-tight felt to keep the airtightness of the bearing portion (polyester 300 g / m ³ t3 ) Is affixed to the entire circumference of the drum support plate 5 and the gap width between the drum support plate 5 and the drum 7 is 2.5 m.
It is assembled in a state compressed by 0.5 mm to m. The compression force is kept as low as 20 g / cm ² or less, and has a small resistance that does not affect the sliding of the drum 7.
Since the hermetic felt 28 is assembled in a compressed state between the drum supporting plate 5 and the drum 7, cotton dust cannot enter between the hermetic felt 28 and the drum 7. As in the case of the front bearing portion, the dust is not accumulated and the drum 7 is locked, and the start-up is not defective, and stable performance can be obtained forever.

FIG. 5 is an enlarged view of a main part of an embodiment of the present invention. The drum supporting plate 5 is provided so that no gap is formed on the drum side of the bearing sliding portion, which corresponds to the entrance of dust to the front bearing portion. In order to suppress the sliding resistance of the bearing sliding portion as small as possible, the hermetic felt 28 in a non-compressed state is incorporated between the bearing 7 and the drum 7 in a compressed state.
The same effect can be obtained by using a structure composed of Figures 6 and 7
When a concave portion is provided in the bearing sliding portion of the drum 7 as described above, the contact surface between the airtight felt 28 and the drum 7 increases, and the airtight effect is enhanced. As shown in FIG. 8, even if the bearing sliding portion of the drum 7 is provided with a protrusion, the contact surface between the airtight felt 28 and the drum 7 increases, and the airtight effect is enhanced. FIG. 9 shows that the cushion member 28a has flexibility and the same effect can be obtained even if the felt 28b having a low sliding resistance is overlapped on the contact surface with the drum 7. FIG. 10 shows a brush 28c implanted like a toothbrush.
The same effect can be obtained by using in a compressed state. In all the embodiments, the airtight felt 28 is attached to the drum support plate 5 side and is slid on the drum 7. However, the airtight felt 28 is mounted on the drum 7 side and is slid on the drum support plate 5. The same effect can be obtained.

[0011]

According to the present invention, it is possible to prevent the dust from entering the sliding portion by keeping the sliding portion of the front bearing airtight with the felt in a compressed state. As with the airtight method, cotton dust enters and accumulates on sliding parts, increasing sliding resistance, eliminating defects such as locking of the drum and inability to rotate. Machine can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a clothes dryer.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a longitudinal sectional view of a main part of FIG. 1;

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is a view of another embodiment corresponding to FIG. 2;

FIG. 6 is a view of another embodiment corresponding to FIG. 2;

FIG. 7 is another embodiment diagram corresponding to FIG. 2;

FIG. 8 is another embodiment diagram corresponding to FIG. 2;

FIG. 9 is another embodiment diagram corresponding to FIG. 2;

FIG. 10 is a view of another embodiment corresponding to FIG. 2;

FIG. 11 is a longitudinal sectional view of a conventional example.

FIG. 12 is an enlarged view of a portion B in FIG. 11;

[Explanation of symbols]

5: drum support plate, 7: drum, 18: motor, 27 ...
Sliding member, 28: airtight felt, 29: airtight felt.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Jouichi Ogoshi 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Plant, Hitachi, Ltd. No. 1 No. 1 in the Taga Plant of Hitachi, Ltd.

Claims (1)

(57) [Claims] And 1. A outer frame, a rotary drum of a rotatably supported by the drying chamber in the outer frame, the ventilation in the rotary drum line
Air blower and a heating unit to heat the air flowing into the rotating drum.
Heating means and an electric power for rotating the rotating drum and the blower;
And a drive for rotatably supporting the rotary drum in front of the rotary drum.
Equipped with a ram support plate, which is slidable around the outer periphery of the drum support plate cylinder
Formed on the front of the rotating drum
The cylindrical outer circumference of the drum support plate
Attach a sliding member that slides and joins the sliding part.
Formed from three annular members located on the center and inside and outside,
Cylindrical bearing slide of a rotating drum facing an annular member placed at
The moving part has an annular recess that is recessed in the outer peripheral direction.
And clothes dryer.