JPH01218499A - Clothes dryer - Google Patents

Abstract

PURPOSE:To deal with the change of a characteristic by means of the notching width of a fan seal which is a small article without newly providing and modifying the molds of a heat exchange fan and a dashboard which are large articles even when the characteristic is changed along with a development and an improvement by providing a slit in the bottom part of a sealing member. CONSTITUTION:To a fan seal 21 composed of a felt member, the slit is executed in the central part of the fan seal 21 full circumference at the pitch of a notching 10mm and a non-notching 5mm. To the outer circumference of a heat exchange fan 7, the fan seal 21 is fixed by a fan seal detent plug 22 so that the notching part of the center of the fan seal 21 can be located in the center of the fitting part of the fan seal 21 of the heat exchange fan 7. At the time of operating, by a flow arrow A of a circulating wind air, the wind pressure of a flow arrow B of an air for cooling, and the centrifugal force of the fan seal 21 itself by means of the rotation of the heat exchange fan 7, the seal 21 is made in contact with dashboard 15 as indicated by a dotted line. Namely, in order to cause the fan seal 21 and dashboard 15 to be in contact at the time of operating, by changing the notching width and non-notching width of the fan seal 21, it can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dehumidifying dryer, and more particularly to a seal that prevents mixed flow between the circulating air side and the cooling air side of a double-blade fan that also has a heat exchanger.

[Conventional technology]

Although the conventional configuration prevents the mixing of circulating air and cooling air in the heat exchanger fan section as described in Utility Model Application No. 59-134767,
The air flow and the amount of deformation caused by the centrifugal force of the sealing member were used to prevent the mixed flow of circulating air and cooling air. However, when developing a new product, changing the air flow rate or the hardness of the sealing member requires changing the dimensions of the heat exchanger fan or partition plate, resulting in expensive development and improvements.

[Problem to be solved by the invention]

The above conventional technology uses the air flow and the centrifugal force of the sealing member to
The dimensions between the heat exchanger fan, partition plates, and seals are determined to ensure airtight circulation and cooling air and prevent mixed flow. Therefore, if you try to change the air flow rate or the hardness of the sealing member as a result of product development or improvement, you will need to modify or install new large heat exchanger fans and partition plates each time, resulting in expensive development and There was a problem in that it was an improvement and could not be easily developed and improved.

An object of the present invention is to enable development and improvement at low cost without modifying large heat exchanger fans and partition plates for each development and improvement.

[Means to solve the problem]

The above object is achieved by adjusting the amount of air flow and the amount of deformation of the seal member due to the centrifugal force of the seal member itself by adjusting the width of the cut and the number of cuts into the seal member.

[Effect]

The width and number of cuts in the seal member are determined by the wind pressure of the circulating air and cooling air generated by the rotation of the heat exchanger fan and the centrifugal force of the seal member itself, making it strong against the partition plate.

By making the contact not weak, no unreasonable force is applied to the seal member, and a highly reliable seal member can be obtained.

〔Example〕

An embodiment of the present invention will be described below.

In FIG. 1, 1 is the main body of the dryer, 2 is a rotary drum rotatably provided in the main body 1 and driven by a motor 3 via a drum belt 4, and 5 is a clothes input port provided on the front side of the main body 1. , 6 is a heater for heating the dryer air flowing into the rotary drum 2, and 7 is a heat exchanger fan provided at the rear of the rotary drum 2, which has air blowing and heat exchange functions. It is driven by a motor 3 via a fan belt 8. 9
is provided on the rear surface of the casing and the rotating drum 2, and has a rotating drum side intake port 1o in the center.

11 is a filter installed on the rear surface of the rotating drum 2 to remove lint, etc.; 17 is a mounting plate fixed to the rear surface of the main body 1 that supports the rotating shaft 14 of the heat exchange fan 7; It has a function to fix it to 1. 20 is a back plate that covers the rear surface of the main body, 13 is a cooling side intake port provided to draw outside cooling air into the heat exchange fan 7, and 19 is for exhausting outside cooling air after heat exchange to the outside of the main body 1. This is a cooling side exhaust port provided on the back plate 20. 15 is a partition plate that has fan seals 2 on the left and right sides of the outer periphery of the heat exchange fan 7.
1 is fixed to a fan seal member 22, and a drying side and a cooling side are airtightly separated by a fan seal 21 and a partition plate 15. Reference numeral 16 denotes a circulation duct, which functions as a ventilation path for guiding exhaust gas from the circulation side of the casing 9 to the heater 6.

Reference numeral 18 denotes a drain port for discharging condensed water generated by heat exchange in the heat exchange fan 7. During drying, the high temperature and high humidity circulating air is cooled and heat exchanged by the heat exchange fan 7, so the moisture is condensed and the dehumidified air is heated by the heater 6 and introduced into the rotating drum 2 again. . Drying can proceed through the above drying cycle. Arrow A indicates the flow of circulating air, and arrow B indicates the flow of cooling air.

In the clothes dryer configured as described above, when the power is turned on, the motor 3 is driven, the rotary drum 2 containing the items to be dried rotates, and the heat exchanger fan 7 is rotated at the same time. As a result, the hot and humid air inside the rotating drum 2 is sucked into the heat exchange fan 7 through the rotating drum side intake port 1o, and the blades 23
The water generated by condensation is exchanged on the surface of the drain port 18
It is discharged to the outside of the main body 1. The air dehumidified by condensation is sent to the heater 6 through the circulation duct 16, where it is reheated and circulated into the rotating drum 2.

Furthermore, at the same time as the drying air flows due to the rotation of the heat exchanger fan 7, an air flow also occurs within the back plate 20, and this air flow is directed from the outside of the main body 1 through the cooling side air port 13 as shown by arrow B. The amount of circulating air (
After removing the heat from the arrow A), it is exhausted to the outside of the main body 1.

Next, based on FIG. 2 and FIG.
will be explained in detail.

FIG. 2 shows a fan seal 21 made of a felt member adopted in the present invention. 10m cut into fan seal 21
m, it is placed in the center of the entire circumference of the fan seal 21 with a pitch of 5 strokes left uncut.

FIG. 3 is a sectional view of a main part when the fan seal 21 explained in FIG. 2 is assembled. The fan seal 21 is fixed with a fan seal member 22 so that the notch at the center of the fan seal 21 is located at the center of the attachment part of the fan seal 21 of the heat exchange fan 7 on the outer periphery of the heat exchange fan 7. During operation, the fan seal 21 comes into contact with the partition plate 15 as shown by the dotted line due to the rotation of the heat exchange fan 7, the wind pressure of the circulating air flow arrow A, the cooling air flow arrow B, and the centrifugal force of the fan seal 21 itself. In other words, in order to bring the fan seal 21 and the partition plate 15 into contact during operation, the fan seal 21
This can be easily done by changing the width of the cut and the width of the remaining cut. Furthermore, since the contact pressure can be changed freely, the reliability of the fan seal 21 is also improved. When the notch part of the fan seal 21 is fixed with the fan seal member 22, the notch part of the fan seal 21 is fixed with the fan seal member 22.
2 can prevent mixed flow of circulating air and cooling air.

4th. Fifth. 6th. A similar effect can be obtained by using a fan seal 21 as shown in FIG.

In FIG. 4, intermittent grooves are provided on the heat exchange fan 7 side.

In FIG. 5, intermittent grooves are formed on the partition plate 15 side.

FIG. 6 shows two fan seals 21 sewn together.

In FIG. 7, grooves are provided all around the heat exchange fan 7 side. The same effect can be obtained by forming similar grooves on the partition plate 15 side.

The sealing member 21 is made of heat-resistant nylon felt (non-woven fabric) with a thickness of about 1.6 ma+. Other materials such as polyester may also be used.

The retaining line, which is a tightening member of the seal member 21, has a diameter of 1 mm.
Use a wire rod of + grade. A fixed drum that does not rotate may be used instead of the rotating drum 2 that stores the material to be dried.

An explanation will be added regarding the bending of the seal member 21 with the bottom as a fulcrum. When creating a slit that is simply a cut as shown in FIG. 2 (in this case, there is no punching material), it is best to use a wire rod with a diameter of about one stroke as the tightening member. If too thick a wire is used, the bottom part where the slit is formed will be pressed wide in the left and right direction, making it difficult to bend, and the advantage of forming the slit will be lost. When using thick wire, see Figures 4, 5, and 6.

It is preferable to use a slit as shown in FIG.

Except for the one in Fig. 6, the slit in this case is a wide gutter-like one from which the scraps come out, so even if the bottom is pressed somewhat widely in the left and right direction, the sealing member 21 will not bend easily. It cannot be done.

The seal member 21 is in close contact with the partition plate 15 during operation,
It is desirable to stay away from the partition plate 15 when the operation is stopped. This is because good adhesion is required to improve sealing performance. The reason why the device is not brought into contact with the partition plate 15 when the operation is stopped is to facilitate the start-up of the operation. A normal induction motor has a small starting torque, and the seal member 21 is attached to the partition plate 1 from the beginning.
5 may cause startup failure, so it is desirable to contact the partition plate 15 after the motor has rotated and exceeded the stall torque.

The seal member 21 uses felt. Felt is highly flexible, airtight, and has excellent sliding properties.

It is for this reason that it is used in the seal part.

A heat exchange fan with corrugated blades is a type of centrifugal fan. Since it rotates at a certain high speed,
The seal member 21 rubs against the partition plate 15 considerably. The seal member 21 needs to be thick in consideration of wear.

For this reason, the bendability of the seal member 21 tends to decrease, making it difficult to improve airtightness with the partition plate 15, which is a bottleneck in increasing the heat exchange rate.

The increase in the thickness of the seal member 21 is suppressed to a moderate level, and the sliding surface side of the seal member 21 is heat treated to suppress wear caused by sliding of the partition plate 15. Through this heat treatment, the surface of the sealing member 21 is lightly baked and hardened. The nap of the felt is gone and the surface is hard and looks like it has been coated. Therefore, the felt is prevented from fraying due to sliding of the partition plate 15. On the other hand, since the sealing member 21 becomes hard due to heat treatment, its flexibility and bendability are reduced, and the airtightness between the sealing member 21 and the partition plate 15 is not good.

Under these circumstances, by providing a slit at the bottom of the seal member 21, bendability is improved and even the stiff seal member 21 can be airtight. .

Further, the seal member 21 has a substantially V-shaped cross section and an annular shape. Since the sealing member 21 is formed by bending a plate-shaped felt material, it extends at the outer circumference and contracts at the inner circumference. Since the sealing member 21 is made of felt, it can expand and contract well and can be formed into the shape described above, but it tends to become wavy due to the expansion and contraction of the inner and outer peripheral parts. The slit works to facilitate shrinkage of the inner circumference, so
This makes it more difficult for waving to occur, and the sealing member 21 comes into contact with the partition plate 15 more evenly, resulting in better airtightness.

〔Effect of the invention〕

As described above, the present invention has the following effects.

1) Even if characteristics change due to development and improvement, there is no need to install or modify large heat exchange fans or partition plates, etc.
It is economical because it can be done with the notch width of a fan seal, which is a small item.

2) Can prevent mixing of circulating air and cooling air,
Increases humidity removal by 10%.

3) Since the partition plate and fan seal can be brought into proper contact, the life of the fan seal is extended, and since the contact pressure is small, startup is possible with low torque.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a clothes dryer incorporating the present invention, Fig. 2 is a view showing the fan seal of the present invention, and Fig. 3 is a cross-sectional view of essential parts incorporating the fan seal of the present invention. ,
4th. Fifth. 6th. Figure 7 is a diagram showing Fan Seal's side job. DESCRIPTION OF SYMBOLS 1... Main body, 7... Heat exchange fan, 15... Partition plate, 21... Fan seal, 22... Fan seal membrane, 23... Heat exchange fan blade. Early Figure No. 217I No. 3

Claims (1)

[Claims] 1. A heat exchange fan comprising a wave-shaped blade, a seal member provided on the outer periphery of the blade, and a seal support portion provided on the outer periphery of the blade and supporting the seal member, One side of the blade allows hot air from a drum for storing clothes to flow through, and the other side of the blade allows cold air from outside to flow through, and the sealing member has a roughly V-shaped cross section and is flexible. In a clothes dryer, the bottom inner circumference of the seal member is attached to a seal support part, and the seal member is tightened from the bottom outer circumference with a tightening member such as a band, in which a slit is formed at the bottom of the seal member. A clothes dryer characterized by being provided with. 2. A clothes dryer according to claim 1, characterized in that the slits are discontinuous. 3. A clothes dryer according to claim 1, characterized in that it has a slit. 4. A clothes dryer according to claim 1, characterized in that it has a gutter-like slit. 5. A clothes dryer according to claim 1, characterized in that it has discontinuous gutter-like slits. 6. A clothes dryer according to claim 1, characterized in that the sealing members separated with slits are sewn together. 7. A clothes dryer according to claim 4 or 5, characterized in that the opening side of the slit is on the outer peripheral side. 8. A clothes dryer according to claim 4 or 5, characterized in that the opening side of the slit is on the inner peripheral side. 9. A clothes dryer according to claim 1, characterized in that the inner surface, which is the sliding surface of the sealing member, is baked. 10. A clothes dryer according to claim 1, characterized in that the sealing member is made of heat-resistant nylon felt. 11. A clothes dryer according to claim 1, characterized in that the tightening member is a wire rod having a diameter of about 1 mm.