JPH0136400B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dehumidifying dryer, particularly a heat exchange structure comprising a fan.

Conventional structure and its problems Conventional dehumidifying dryers of this type introduce hot air into the drum, pass the hot air coming out of the drum through a heat exchanger, and then reheat it with a heating element. A circulation fan that generates circulating air that returns to the drum,
Two types of cooling fans were provided independently to cool the heat exchanger. Therefore, the impeller, fan case, and ventilation path of each fan had to be arranged separately.

In addition, ventilation channels for circulating air normally pass through humid air, condensing in the heat exchanger, and gradually removing the moisture contained in clothing, so they must be particularly airtight and watertight. Conventionally, it was necessary to provide a reliable watertight structure at the connections between the fan case and the ventilation passage, between the ventilation passage and the heat exchanger, and even between the drainage passage and the heat exchanger. Ta.

Conventional dehumidifying dryers use a heat exchanger,
Circulation fans, cooling fans, ventilation channels and drainage channels that connect these fans, and a large number of parts to ensure airtightness and watertightness between them are required, making it unavoidable and making it difficult to achieve the desired design of the dryer. Maintaining performance and ensuring quality requires the extensive experience of assembly workers and a large number of man-hours, which in turn increases manufacturing costs.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks and provides a dehumidifying dryer that can sufficiently exhibit the desired performance with a small number of parts and a simple configuration.

Structure of the Invention In order to achieve the above object, the present invention has the following features:
A rotating drum for stirring the loaded clothes, a circulation fan for circulating hot air within the rotating drum, and a double-wing fan for blowing cooling air provided integrally with the circulation fan on the front and back sides, The double-wing fan is configured to exchange heat between the circulating air and the cooling air through its thin plate portion, and has a U-shaped groove formed on the outer periphery of the double-wing fan, and is bendable in the U-shaped groove and has hairs on the surface. The bent part is attached to a non-woven fabric which has been subjected to a baking process and has a substantially V-shaped cross section, and the inside of the sealing member is partitioned into a circulation air side and a cooling air side, and the baking-treated surface of the sealing member is rotatably slidable. It is equipped with movable partition members.

Description of Examples Examples of the present invention will be described below. In the figure, 1 is a drum 2 into which clothes are put and rotated for agitation.
3 is a heating element for introducing hot air into the drum 2, and 4 is a case in which the heating element 3 is housed. 5 is a double-winged fan,
A boss 6 is arranged in the center, and a pair of oil-less metals 7 are inserted into the boss 6 to rotatably support the double wing fan 5, and a U-shaped groove 8 is provided in the outer periphery.
, and has an impeller portion 9 that protrudes approximately radially from the midsection and has an approximately meandering cross-sectional shape in the circumferential direction. The impeller part 9 is made of a relatively thin resin film, and the unevenness on one side forms a circulation fan 10 that introduces hot air from the heating element 3 into the drum 2, and the unevenness on the other side forms a circulation fan 10 that introduces hot air into the drum 2. Air is taken in through the intake port 11 on the outer wall, and air is taken in through the exhaust port 12 on the lower outer wall of the fuselage 1.
A cooling fan 1 that generates cooling air exhausted from the
3 is formed. Since this relatively thin resin film forms a boundary film through which the circulating air and cooling air pass, heat transfer occurs through this thin film.
That is, this impeller portion 9 plays the role of a heat exchanger. One side of the double wing fan 5 is a circulation fan 10
The other side forms the cooling fan 13, but the two sides are one and the same.

Reference numeral 14 denotes a disk-shaped reinforcing plate that covers the central part of the circulation side of the double-wing fan 5. The outer peripheral edge of this reinforcing plate 14 is fixed by screwing to the mounting boss 15 provided on the double-wing fan 5. It plays a role in correcting distortions.

Further, the temperature of the circulating air of the double-winged fan 5 rises, and warpage of the entire double-winged fan 5 due to the difference in elongation of the resin on the circulation side and the elongation of the resin on the cooling side is alleviated.

Reference numeral 16 denotes a fan pulley for driving the double-wing fans 5, which is provided at the center of the cooling side of the double-wing fans 5. The fan pulley 16 is made of a metal plate, and has a fan pulley forming part having a circumferentially inclined side surface 17 at the center of the double-wing fans 5. established,
The belt 18 for driving both wing fans is attached to the fan pulley 16 in correspondence with the inclined side surface 17, and is attached to the V-shaped groove formed by both sides including the inclined side surface formed on the fan pulley 16. are doing.

19 is a motor, and motor pulley 2 is attached to its shaft.
The fan drive belt 18 is looped between the motor pulley 20 and the fan pulley 16. A drum pulley 21 is fixed to the shaft of the motor 19, and a V-belt 22 is looped between it and the outer circumference of the drum 2, and drives the drum 2 to rotate.

Reference numeral 23 denotes a shaft that pivotally supports the wing fans 5, and is crimped and fixed to the center of a beam 24 fixed to the rear of the fuselage 1. Reference numeral 25 denotes a retaining ring provided on the axis of the double wing fan 5 to restrict the position in the axial direction so as to sandwich the boss 6 at the center of the double wing fan 5. The double wing fan 5 is provided with an appropriate amount of play 26 in the axial direction. It is provided.

27 is a U formed on the outer periphery of the double wing fan 5.
This is a flexible and bendable sealing member having a V-shaped cross section, which is attached to the groove 8, and is formed in a circular shape and is attached to the entire outer periphery of the double-wing fan 5. , 28 is a fan case that constitutes the circulation fan side of the double-wing fan 5. This fan case 28 is integrally formed of resin or the like, and includes a partition portion 29 that forms the outer peripheral edge of the rotating surface of the double-wing fan 5, and the circulation fan 10. a vortex chamber 31 for guiding the circulating air generated by the vortex chamber to the ventilation passage 30;
A drum in which an intake port 32 for sucking circulating air into the circulation fan 10 and a drum seal 33 provided to ensure airtightness of a passage connecting the intake port 32 of the fan case 28 from the inside of the drum 2 are brought into sliding contact. forming a sealing portion 34 and a partition wall 36 that is located at the outer edge of the fan case 28 and constitutes a vortex chamber portion 35 for guiding the cooling air to the exhaust port 12 on the outer wall of the aircraft body 1;
An end surface 37 of the bulkhead 36 is inscribed in the fuselage 1.

Reference numeral 38 denotes a sealing metal fitting having a square cross section and attached to the inner end of the partition part 29 of the fan case 28, and is attached to the sealing member 27 of the double-wing fan 5 over the entire inner circumference of the partition part 29 of the fan case 28. The seal fitting 38 is press-fitted into the narrow gap 39 of the partition part plate thickness of the fan case 28, and is caulked into the V-shaped groove part 41 formed by the bent part 40 at one end and the partition part 29 of the fan case 28. The material or packing 42 is injected or inserted.

A fan case 2 43 is provided in close contact with the inner wall surface of the peripheral edge 44 of the intake port 32 of the fan case 28.
In the reinforcing plate 8, the center of the reinforcing plate 43 is pressed against the retaining ring 25 provided on the shaft 23 of the double-wing fan 5 with the opposite side of the side that is in close contact with the fan case 28,
The midsection has the circulation air vent 45, and the outer periphery is provided with a mountain-shaped protruding ring 46 toward the inner wall surface of the fan case 28, and a recess 47 of the fan case 28 is provided corresponding to this shape. A drum seal 33, which is fixed to the drum 2 by adhesive, is pressed and slid onto the outer peripheral wall 48 of the rear surface of the recess 47 of the fan case 28.

Reference numeral 49 denotes a mounting fitting for tightening and fixing the sealing member 27 to be mounted in the U-shaped groove 8 formed on the outer periphery of the double-wing fan 5.

This sealing member 27 uses felt made of non-woven fabric in this embodiment, but when the double-wing fans 5 rotate at high speed, the sealing member 27 attached in a V-shape
7 becomes narrower in its opening angle due to centrifugal force, and its inner surface comes into sliding contact with the seal fitting 38, causing severe wear. Due to this wear, the fuzz that has formed on the felt surface of the sealing member 27 is scattered, and this fuzz may be carried by the circulating wind from the ventilation path through the case of the heat generating element 3 to the heat generating element 3. . If a large amount of fluff is generated and remains on the ventilation surface of the heating element 3, the amount of circulating air passing through the heating element 3 will be reduced, and as a result, the heating element 3 will not be able to fully exhibit its intended performance. In other words, the amount of heat generated decreases significantly, and the dryer no longer functions properly. However, in this embodiment, the fuzz that occurs on the surface of the felt is burned off with a flame to make the sliding surface relatively smooth.

To explain the operation of the dehumidifying dryer in this embodiment, the clothes that are put into the drum 2 and rotated are agitated. The air becomes moist and is sent to the circulation fan side of both wing fans 5. Heat is removed from the circulating air by the double-wing fan 5, moisture contained in the circulating air is condensed, and the air returns to the heating element 3 again. The dew-condensed moisture is blown away by the double-wing fan 5, collected on the inner wall of the fan case 28, and discharged from a drain port (not shown) provided in a part of the ventilation passage 30. Such circulation of the circulating air is repeated, and the clothes are successively dried.

Effects of the Invention As described above, according to the present invention, the conventional heat exchanger,
The circulation fan and the cooling fan are composed of a single double-blade fan, and the path from the fan case to the ventilation path and the heating element is simplified, and a dehumidifying dryer can be realized with an extremely simple configuration.

In addition, the double-wing fan has a substantially V-shaped seal member on its outer periphery, which improves the tightness between the seal member and the partition member when the double-wing fan rotates, thereby improving airtightness. The properties can be improved by subjecting the sliding surface of the partition member to a fluffing treatment, and it is possible to prevent the clothes dryer from getting stuck due to fluff flying.

In addition, warping occurs throughout the double-wing fan due to the temperature difference between the circulation side and the cooling side, but the reinforcing plate fixed to the double-wing fan can suppress that warping as much as possible, and even if warping occurs, Both wing fans can move in the axial direction within the warp range, absorbing the warpage and rotating smoothly.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a dehumidifying dryer showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of both wing fan sections of the dehumidifying dryer, and Fig. 3 is an enlarged sectional view of the essential parts. be. 2...Drum, 3...Heating element, 5...Double wing fan, 8...U-shaped groove, 10...Circulation fan, 11...
... Intake port, 13 ... Cooling fan, 14 ... Reinforcement plate, 16 ... Fan pulley, 17 ... Inclined side surface, 23 ... Shaft, 25 ... Retaining ring, 26 ... Play, 27 ... Seal member , 28... Fan case, 29... Partition section, 30... Ventilation duct, 31, 3
5... Vortex chamber section, 33... Drum seal, 36...
Partition wall, 38... seal fitting, 42... caulking material.

Claims (1)

[Scope of Claims] 1. Consists of a rotating drum for stirring loaded clothes, a circulation fan for circulating hot air within the rotating drum, and a cooling fan for blowing cooling air provided on the front and back sides of the circulation fan. a double-winged fan, the double-winged fan is configured to exchange heat between the circulating air and the cooling air through its thin plate portion, and a U-shaped groove is formed in the outer periphery of the double-winged fan, and the double-winged fan is bendable. An annular sealing member made of nonwoven fabric with a hand-baked surface has a substantially V-shaped cross section, and its bent portion is attached to the U-shaped groove, and inside the sealing member there are a circulating air side and a cooling air side. A dehumidifying dryer comprising a partition member on which the burnt surface of the seal member rotates and slides. 2. The double-wing fan is provided with a substantially disk-shaped reinforcing plate whose outer peripheral edge is fixed to the double-wing fan on one side thereof, and a fan pulley forming portion having an inclined side surface is provided on the other side, and the inclined side of the fan pulley forming portion is provided on the other side. A dehumidifying dryer according to claim 1, wherein the side surface and the corresponding fan pulley form a substantially V-shaped groove for tensioning the belt. 3. The double-wing fan has a play that is movable in the axial direction at its shaft support, and the amount of play is approximately equal to the amount of deformation in the axial direction of the outer circumference of the double-wing fan. Dehumidifying dryer.