JPH0530715Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dehumidifying clothes dryer for use in general households.

BACKGROUND ART Conventionally, as shown in FIGS. 5 and 6, the structure of this type of dehumidifying clothes dryer is that a rotating drum 2 is provided inside a main body 1, and a double-wing fan is provided behind the rotating drum 2. 9 blows the drying air a heated by the heater 3 and the cooling air b drawn from the intake port, and performs heat exchange between the two airs. This double-wing fan 9 is housed in a fan case A made of injection molding. The fan case A has a plate-shaped partition plate located inside the sealing member 19 that is attached to the outer periphery of the fan 9 on both sides in a substantially V-shape to partition the drying air a and the cooling air b. 35 is fixed with a screw 36. A sealing material 37 was applied to the joint between the fan case A and the partition plate 35 to ensure airtightness.

Problems to be Solved by the Invention In such a conventional configuration, it is necessary to ensure flatness of the joining surfaces of both the partition plate 37 and the fan case A to ensure airtightness, and it is necessary to ensure high precision of the parts. I needed to. In addition, since the drying air a is high temperature and humid and has a large temperature difference with the cooling air b, it repeatedly expands and contracts due to the difference in thermal expansion between the fan case 2 and the partition plate 4, causing the sealing material 37 to Effects alone were no longer sufficient. Also, if mechanical external force, especially twisting, etc. is applied during product assembly,
There were problems such as peeling occurring in the seal portion 37 and loss of airtightness.

Further, the drying air introduced into the fan case A is sucked in from the center of the fan 9 with both wings, is sent out to the outer periphery, flows along the outer periphery inner wall of the fan case A, and is sent to the heater 3 from the lower outlet of the fan case A. However, the conventional configuration of the fan case A is not configured to efficiently send the drying air sent out from the outer periphery of the double-winged fan 9 to the outlet of the fan case A. In other words, the air blowing area of the outer periphery of the fan case A Since the configuration does not increase the amount of drying air, it is not possible to increase the heat exchange efficiency by increasing the volume of drying air.

In view of the above-mentioned problems, the present invention aims to improve airtightness by reliably partitioning drying air and cooling air, and to increase heat exchange efficiency by increasing the volume of drying air.

Means for Solving the Problems In order to achieve the above object, the present invention includes a rotating drum for agitating clothes, a circulation fan for circulating hot air through a circulation path within the rotating drum, and a cooling air blower. The cooling fan is integrally formed on the front and back sides, and includes a double-winged fan that exchanges heat between the circulating air and the cooling air, and a circulation casing that covers the circulating air side of the double-winged fan is provided with a cooling fan disposed on the outer periphery of the double-winged fan. A fan case is constructed by attaching a cooling casing having a partition section that partitions a circulating air side and a cooling air side, and the circulating casing and the cooling casing are formed by injection molding thermoplastic resin. A groove portion for heat welding is formed in the outer peripheral flange of the cooling casing, and a partition portion is provided extending from the groove portion to the outer peripheral side of both wing fans, and a recess portion protruding toward the cooling side is formed in the partition portion. It is.

Effect With the above configuration, the joint surfaces of the circulation casing and the cooling casing are welded and joined, and grooves are provided for positioning when welding the two cases and for holding each part, so the fan case The outer periphery can be fixed by pressure while ensuring airtightness, and can be easily assembled. Additionally, the recesses provided in the cooling casing increase the surface area for heat exchange, increasing heat exchange efficiency.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. In the figure, 1 is an outer frame that rotatably supports a drum 2 that rotatably agitates clothes, 3 is a heating element for introducing hot air into the drum 2, and 4 is a housing for housing the heating element 3. It is a heater case. Reference numeral 5 designates a double-winged fan, and the irregularities on one surface form a circulation fan 6 for introducing hot air from the heating element 3 into the drum 2, and the irregularities on the other surface form a circulation fan 6 for introducing hot air into the drum 2 from the rear outer wall of the outer frame 1. , forming a cooling fan 9 that generates cooling air exhausted from an exhaust port 18 in the lower outer frame of the outer frame 1.

Reference numeral 10 denotes a fan pulley provided at the center of the cooling side of the double-wing fan 5, on which a malbelt 11 for driving the double-wing fan 5 is hung. Reference numeral 12 denotes a motor, a motor pulley 13 is fixed to the shaft thereof, and the multi-belt 11 is strapped between the motor pulley 13 and the fan pulley 10. 14 is a drum pulley fixed to the shaft of the motor 12;
A V-belt 15 is placed between the drum 2 and the outer circumference of the drum 2, and the drum 2 is driven to rotate.

Reference numeral 16 denotes a shaft for pivotally supporting the double wing fan 5, which is fixed to the rear of the outer frame 1 and crimped to the center of the beam 17.

Reference numeral 19 denotes a flexible and bendable sealing member having a V-shaped cross section attached to the outer periphery of the double-wing fans 5; 20 denotes a circulation casing injection-molded from thermoplastic resin constituting the circulation fan side of the double-wing fans 5; A reinforcing plate 21 having an intake port for sucking drying air in the part.
A flange portion 24 is provided on an outer circumferential wall 23 forming the outer periphery of the casing, and a rib 25 is provided on the flange portion 24. Outer peripheral wall 23, flange portion 24, rib 25
A groove portion 26 is formed around the entire circumference. On the other hand, an exhaust port 27 for discharging the drying circulation air generated by the circulation fan 6
The half of the is provided in a substantially U-shape. In addition, the flange portion 24 has a welded portion A28 with a U groove that is approximately U.
They are provided on the same plane on the outer periphery so as to correspond to the letter-shaped exhaust port 27.

On the other hand, a cooling casing 29 made of thermoplastic resin is located inside the sealing member 18 and is connected to a partition portion 30 that forms the outer periphery of the rotating surface of the double-winged fan 5 and to the outer frame 1 from the partition portion 30. An outer wall 31 that is inscribed to form a casing is integrally provided, and a groove 32 that is connected to the outer wall 31 is also provided, and a substantially U-shaped exhaust port A27- of the circulation casing 20 is provided.
Approximately U-shaped exhaust port B27-B in the part corresponding to A
The groove portion 32 is formed up to the exhaust port B27-B. The groove portion 32 is set corresponding to the flange portion 24 of the circulation casing 20, and the welded portion B33 provided on the flange portion 24 side of the groove portion 32 is provided on the same plane on the outer periphery thereof.

Then, by attaching the groove A26 to the jig A and the groove B32 to the jig B, and vibrating the casing in the radial direction while applying pressure, the welded part A28 and the welded part B33 slide and generate frictional heat. By generating and welding, the circulation casing 20 becomes integrated with the cooling casing 29, and the partition wall 22, the outer peripheral wall 23, and the partition 30 of the cooling casing 29
At the same time as the circulating air casing was completed,
The approximately U-shaped exhaust port A27-A and the approximately inverted U-shaped exhaust port B27-B are also integrated to complete the exhaust port 27.

The partition portion 30 of the cooling casing 29 is formed with a recessed portion projecting toward the cooling side, increasing the surface area where the circulating air and the cooling air can exchange heat, thereby increasing the heat exchange efficiency.

In addition, since the cooling casing 29 and the circulation casing 20 are molded from the same thermoplastic resin, and these casings are thermally welded to form the fan casing, each casing is displaced in the same way due to thermal expansion and contraction. Therefore, there is no possibility of incomplete airtightness.

In addition, the fan case has integrally molded parts for attaching to the beam 17 that supports both wing fans 5 and the partition part 29, so that the centers of both wing fans 5 and the partition part 29 of the fan case can be easily aligned. There is.

An exhaust port 35 is provided in a substantially L-shaped duct 34 that connects the heater case 4 and the exhaust port 27 and forms a closed loop circulation path for drying air. Therefore, the drying air heated through the heating element 3 by the action of the circulation fan 6 of the double wing fan 5 is transferred to the drum 2.
The air is sucked into the inside and exchanges heat with damp clothing, reaching the double wing fans 5 as hot and humid air.On the other hand, the cooling fan 9, which is integral with the circulation fan 6 of the double wing fans 5, cools the double wing fans 5. The blades are cooled and condensed on the surface of the circulating air side of the double-wing fan 5, which is blown away by centrifugal force, collected in the circulation casing 20, guided to the approximately L-shaped duct 34, and discharged from the drain port 36 to the machine. is discharged outside.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the circulation and cooling casings are molded by injection molding a thermoplastic resin, so that the dimensional accuracy of each casing can be improved. In addition, when heat welding each casing, a welding jig can be attached to the groove provided on the outer flange of the casing, so if you manage the pressurization and stroke of the jig, you can provide a highly airtight fan casing. . Furthermore, by forming a recess that protrudes toward the cooling side in the partition to increase the heat exchange area between the circulating air and the cooling air,
Since the air blowing area of the outer circumference of the circulation casing is increased, heat exchange efficiency can be increased.

[Brief explanation of the drawing]

Fig. 1 is an exploded sectional view of essential parts of a clothes dryer showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the same, Fig. 3 is a perspective view of the same with the fan case separated, and Fig. 4 is the same. FIG. 5 is a longitudinal cross-sectional view of a conventional dehumidifying clothes dryer, and FIG. 6 is a cross-sectional view showing the configuration of a fan case. 20...Circulation casing, 26...Groove, 2
8, 33... Welded part, 29... Cooling casing, 30... Partition part.

Claims (1)

[Scope of utility model registration request] A rotating drum for agitating the clothes, a circulation fan for circulating hot air through a circulation path in the rotating drum, and a cooling fan for blowing cooling air are integrally formed on the front and back, and a cooling fan is formed between the circulating air and the cooling air. A cooling fan comprising a double-winged fan for heat exchange, and a circulation casing that covers the circulating air side of the double-winged fan has a partition section disposed on the outer periphery of the double-winged fan to partition the circulating air side and the cooling air side. The casing is attached to constitute a fan case, the circulation casing and the cooling casing are formed by injection molding thermoplastic resin, and the outer peripheral flange of the cooling casing is formed with a groove to be thermally welded. A dehumidifying clothes dryer in which a partition is provided extending from the groove to the outer periphery of the fan, and a recess projecting toward the cooling side is formed in the partition.