JPS5985697A - 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 drum-type clothes dryer for use in general households.

Conventional Structure and Problems Conventionally, this type of drum dryer has the structure as shown in FIG. The front part of the fuselage 4 where the baffle plate 3 is partially provided,
A disc 6 with a central flange 5 and a circular opening still covers the rear part of the fuselage 4 with a bearing 7 in the central part in the form of a disc.
A drum 9 is housed in which the body 4 is fixed by crimping or the like between the circular plate 8 and the outer periphery of the circular plate 8.

At the rear of the drum 9, a fan case 1 is constructed of a fan case 11 which is rotatably supported by a bearing 7 and has a shaft 10 fixed thereto, and a fan case 12 which is joined to the fan case 11 by caulking or the like.
3 and houses a fan 14 inside. A part of the fan case 13 is made an open part, an exhaust pipe 16 is connected to the fan case 13, and dried air is discharged to the outside of the box body 1 through the exhaust pipe 16.

A bearing 16 is fixed to the fan case 12, and a fan shaft 17 is axially supported.
A fan pulley 18 is fixed in the opposite direction to 4.

Reference numeral 19 denotes a motor attached to the bottom surface of the box body 1 via a placket 20, and the rotation of the motor 19 is caused by a belt 24 wound around it via a drum pulley 22 and a tension pulley 23 fixed to a motor shaft 21. Yo Citram 9
At the same time, rotation is transmitted to the fan 14 by a fan belt 26 wound between a motor pulley 25 fixed to the motor shaft 21 and the fan pulley 18.

On the other hand, on the inner surface of the flange 6 of the disc 6 at the front of the drum 9, a bearing material 27 having good wear resistance and a small coefficient of friction is attached and fixed so as to be slidable.

The front portion of the drum 9 is pivotally supported by a front support plate 28 having an outer diameter that can be moved around the inner diameter of the bearing material 27. The front support plate 28 is fixed to the front plate 2 via a block 29 and a heater plate 31 that fixedly supports a heater 3o inside the block 29, and the drum 9 is rotatably supported within the box body 1. There is.

Further, the front plate 2 has a slot 33 into which a window 32 provided at the center of the front support plate 28 is fitted, and the window 32 and the slot 1'' 33 are joined to a backing 34 so as to be airtight. It is. A lid 35 is provided which is rotatably supported by the front plate 2 and a hinge (not shown), and this lid 35 is closed to cover the input port 33.
In this closed state, the ribs 36 provided on the lid 36 come into contact with the backing 34 to make the drum 9 airtight.

Furthermore, an air intake port 36' is provided in a part of the lid 35, and the front plate 2
A suction port 37 is provided at a position opposite to the air intake port 36'. At the rear of this inlet 37, there is a heater plate 31 sandwiched between the front plate 2 and the front support plate 2B, and a heater 30 fixed to the heater plate 31.
A large number of small holes 38 are provided at positions facing the heater 30.
The outside air is communicated to the inside of the drum 9 through the drum 9.

In the above configuration, while the drum 9 rotates, outside air enters from the air intake port 36 and is heated by the heater 30, enters the drum 9, and exchanges heat with the cloth to form the circular shape forming the drum 9. A large number of ventilation holes 41 shown in FIG. 2 are provided on the circular substrate 8, passing through a filter cover 39 detachably attached to the substrate 8, and a filter 40 detachably attached to the filter cover 39. Furthermore, air is exhausted to the outside through the hole 42 of the fan case 11, the inside of the fan case 13, and the exhaust pipe 15, thereby drying the cloth.

In the above-mentioned conventional electric dryer, a thermistor heater (hereinafter simply referred to as a semiconductor heater) having a positive resistance-temperature characteristic is increasingly used instead of a nichrome heater for reasons of safety. When this semiconductor heater is used, the amount of heat generated is greatly influenced by the outside temperature and the amount of air passing through the heater portion. In other words, if the outside temperature is low, the amount of heat generated by the semiconductor heater will increase, and if the amount of air passing through the semiconductor heater is large, the amount of heat generated by the heater will increase.
Therefore, the drying time is shortened and the performance of the product is improved.

As mentioned above, although safety has improved by changing the heater from nichrome heater to semiconductor heater,
No special measures were taken to increase the amount of air passing through the semiconductor heater, and the drying performance was not necessarily good even if a semiconductor heater was used. In view of the conventional problems, the present invention provides an electric dryer that increases the amount of air passing through the semiconductor heater in the electric dryer to increase the amount of heat generated, improves the drying performance, and allows more effective drying. The purpose is to

Structure of the Invention In order to achieve the above object, the present invention provides a large number of ventilation holes in a circular substrate constituting the rear part of a drum rotatably supported in a box body, and the ventilation holes extend from the center side of the circular substrate to the outer periphery. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. When the heater 30 is composed of a semiconductor heater, the amount of air passing through the semiconductor heater largely depends on the performance of the fan 14, but there are also several other factors. One of them passes through the heater 30 and the front support plate 2
The air that passes through the hole 38 of 8 and enters the drum 9 exchanges heat with the clothes, passes through the hole 41 provided in the center of the circular board 8, and heads into the fan case 13. At this time, the air enters the drum 9. The larger the total area of the ventilation holes 41 provided in the circular substrate 8 constituting the heater 30, the less it will obstruct the passage of air, so the amount of heat generated by the heater 30 will not decrease. In order to increase this area, the ventilation hole 41 may be opened over a wide area in the center of the circular substrate 8, but in this case, the filter cover 39 and filter 40 attached to the circular substrate 8 will also become larger, and as a result, the drum 9 Occupied volume within the interior increases,
The volume that the clothes can fit in becomes smaller, and the efficiency decreases accordingly. Moreover, the cost increases accordingly.

Therefore, in order to create a ventilation hole 41 with a large total area in a not-so-large area at the center of the circular board 8, the diameter of the ventilation hole 41 is made smaller in the center as shown in FIG. If the diameter of the ventilation holes 41 is gradually increased toward the outer diameter direction, the total area of the ventilation holes 41 in the same area can be increased. Moreover, since the amount of heat generated by the heater 30 is not reduced, efficient drying can be performed. Further, there is no need to make the filter 40 and filter cover 39 large, and high costs can be avoided.

Effects of the Invention As is clear from the above embodiments, the present invention allows the total area of the ventilation holes to be increased within a range that is not too large, does not obstruct ventilation, and performs efficient drying. be able to.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a conventional electric dryer, FIG. 2 is a front view showing the ventilation hole portion of a conventional circular board, and FIG. 3 is a front view showing the ventilation hole portion of the circular board in an embodiment of the present invention. It is a front view. 8... Circular board, 9... Drum, 41
・・・・・・Ventilation hole. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A clothes dryer in which a large number of ventilation holes are provided in a circular base plate constituting the rear part of a drum rotatably supported within a box body, and the diameter of the ventilation holes increases from the center side of the circular base plate toward the outer circumference. .