JPS5985696A - Electric 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 electric dryer for general household use.

Structure of conventional example and its problems Conventionally, this type of drum-type electric dryer has the structure as shown in FIG. The front part of the fuselage 4 is provided with a baffle plate 3, and has a flange 6 in the center, and a disc 6 having a circular opening. A drum 9 is clamped by a fixed circular base plate 8, and a body plate 4 is fixed by caulking or the like between the circular base plate 8 and the outer periphery of the circular base plate 8.
to store.

At the rear of the drum 9, a fan case 13 is formed by a fan case 11 to which a shaft 1o supported by a bearing 7 is fixed, and a fan case 12 joined to the fan case 11 by caulking or the like, and a fan 14 is installed inside. to store. fan case 1
3 is an open part, and the exhaust pipe 15 is connected to the fan case 13.
The air after drying is discharged to the outside of the box body 1 through this exhaust pipe 16.

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

Reference numeral 19 denotes a shift motor attached to the bottom of the box 1 via a placket 2o, and the rotation of this motor 19 is caused by a belt 24vC wound around a drum pulley 22 and a tension pulley 23 fixed to a motor shaft 21. It is transmitted to the drum 9. At the same time, rotation is transmitted to the fan 14 by a fan belt 26 wrapped between a motor pulley 26 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 wear is attached and fixed so as to be slidable.

1-, the front part of the dryer i,.
I + support 1t. 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 30 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 bin 32 provided at the center of the front support plate 28 is fitted, and the window 32 and the slot 133 are joined to be airtight by a backing 34. A lid 36 is provided which is rotatably supported by the front plate 2 and a hinge (not shown), and this lid 36 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.

Further, an air intake port 36 is provided in a part of the lid 36, and an inlet port 37 is provided in the front plate 2 at a position opposite to the air intake port 36. At the rear of this intake port 37, there is a front plate 2 and a front support plate 2B.
There is a heater plate 31 sandwiched between the heater plate 31 and a heater 3o fixed to the heater plate 31. A large number of small holes 38 are provided in the front support plate 28 at a position facing the heater 30, and outside air is supplied through the heater 30. is communicated with the inside of the drum 9.

In the above configuration, while the drum 9 rotates, outside air enters from the air intake port 36, is heated by the heater 30, enters the drum 9, and is transferred to the circular substrate 8 constituting the drum 9 while exchanging heat with the cloth. Filter cover 39 detachably attached. and a V that can be attached and detached to the filter cover 39.
A large number of small holes 41. Furthermore, fan case 1
1 hole 42. Air is exhausted from inside the fan case 13 through the exhaust pipe 16 to the outside, thereby drying the cloth.

Recently, in electric dryers having the above configuration, a semiconductor heater (hereinafter simply referred to as a semiconductor heater) having a positive resistance temperature characteristic has been used as the heater 30 instead of a nichrome heater for safety reasons. became. When this semiconductor heater is used, the heat generation (input) of the semiconductor heater is determined by the temperature of the wind passing through the semiconductor heater and the time for the wind to pass.In other words, if the wind temperature is low, or If there is more wind song, the heat generation (input) song of the semiconductor heater will increase, the drying time will be shorter, and the drying performance will be better.

By the way, conventionally, as mentioned above, when the bearing 112T is attached to the flange 6 of the disk 6 and slides with the front support plate 28 of the 1-1 in the rotating sliding part of the drum 9, this sliding part is As shown in FIG. 2, a certain amount of clearance S is required. This is because there is no gap between the sliding parts.
This is because the rotational torque of the drum 9 is very large, and in order to rotate the drum 9 with this large rotational torque, a motor 19 having a large torque r is required, which increases the cost of the motor 19.

Therefore, if a certain amount of clearance is created in the sliding part,
The rotational torque of the drum 9 becomes smaller, so the motor 19
The torque of the motor can also be small. However, as the fan 14 rotates, the only air that enters the drum 9 should be the air that passes through the heater 30 from the suction port 37, but instead of the air that enters the drum 9 directly from the gap between the sliding parts of the drum 9. e
It will go inside. Therefore, since the performance of the fan 14 is determined by the air that does not pass through the heater 30, there is a drawback that the air that passes through the heater 30 is reduced, the heater input is reduced, and the drying performance is reduced. there were.

Purpose of the Invention The present invention solves these conventional problems by reducing the amount of air flowing through the gap in the sliding part of the drum, increasing the input to the semiconductor heater that controls the resistance temperature characteristics of 1F, and improving the drying performance. The aim is to increase the

Structure of the Invention In order to achieve the above objects, the present invention includes a drum rotatably housed in a box, and a semiconductor heater having a positive resistance temperature characteristic for heating air sent into the drum. , Ail 1' An ellipsoidal plate which forms the front part of the ram and has a flange around its periphery, and a front support plate which is fixed to the front plate of the box body and pivotally supports the flange via a bearing material. The front support plate is provided with a flange having a larger diameter than the flange of the disk, and both flanges overlap.

Description of examples The present invention will be described in detail below on the basis of the accompanying drawings.

Figure 3 shows the configuration of this embodiment, and in this figure, the same reference numerals as in Figures 1 and 2 indicate the same parts 4M.
The explanation will be omitted. In FIG. 3, a bearing material 2 is attached and fixed to the flange 6 of the disc 6 constituting the drum 9, and a sliding surface 43 on which the bearing material 27 slides is still attached to the front support plate 28. It is set up. Further, the front support plate 28 has a flange 44 extending in the outer circumferential direction from the sliding surface 43. The flange 44 has a diameter slightly larger than the diameter of the flange 5 of the disc 6, and has a folded portion 46 so as to overlap the flange 5.

In the above configuration, the operation will be explained. In order to increase the amount of heat generated by the semiconductor heater, which has a positive resistance-temperature characteristic, it is necessary to directly enter the drum e through a gap S slightly formed in the sliding part between the drum 9 and the front support plate 28, without passing through the heater 30. It is necessary to reduce the amount of air entering the In this embodiment, the flange 6 of the disc 6 and the flange 44 of the front support plate 28 overlap, and the amount of air flowing between the flanges 6 and 44 is reduced, and the amount of air passing through the heater 30 is reduced accordingly. increases, the amount of heat generated by the heater 3o increases, drying takes place in a short time, and drying performance improves.

Note that the flange 44 extends in the outer circumferential direction of the front support plate 28.
If a buffer strip 46 as shown in FIG. 3 is attached and fixed to the inside and back of the holder, the effects mentioned above will be further enhanced.

Effects of the Invention As is clear from the above embodiments, the present invention provides a front support plate with a flange having an outer diameter larger than the outer diameter of the flange of the disk at the front of the drum, and both flanges overlap. This reduces the amount of air that directly enters the drum without passing through the semiconductor heater, which has positive resistance-temperature characteristics, and increases the amount of air that passes through the heater, increasing the amount of heat generated by the heater and improving drying performance. It is. Moreover, by just slightly improving the shape of the bearing material side of the front support plate,
The purpose of the present invention can be achieved, and a structure with an extremely simple configuration that can be easily mass-produced can be provided.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a conventional electric dryer, Fig. 2 is an enlarged sectional view of the bearing portion of the drum, and Fig. 3 is an enlarged view of the bearing portion of the drum in a further embodiment of the present invention. be. 5...Flange, 6...Disc, 9...
... Drum, 27 ... Bearing material, 28 ... Front support plate, 30 ... Heater, 43 ... Sliding surface, 44 ... Flange . Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (1)

[Claims] A drum rotatably housed in a box, a semiconductor heater having a positive resistance temperature characteristic for heating the air sent into the drum, and a flange forming the front part of the drum and having a flange around the center opening. a circular plate, and a front support plate fixed to the front plate of the box body and pivotally supporting the seven flange through a bearing, the front support plate having a diameter larger than the flange of the disk. An electric dryer with two flanges that overlap.