JPH02119899A - Dehumidifying clothes drying machine - Google Patents

Abstract

PURPOSE:To improve a quantity of air, its pressure and dehumidifying performance by constituting a both-blade fan forming its blade sectional shape into a saw tooth section, consisting of a vertical surface vertical with respect to a peripheral plate and a tilt surface, while alternately arranging the vertical and tilt surfaces for the direction of rotation. CONSTITUTION:A both-blade fan 104 forms a sectional shape of its blade 104a with a surface for the direction of rotation B set to a vertical surface (x) (cooling side) and with the other surface set to a tilt surface (y) with respect to a peripheral plate 104c. While similarly to a circulating side, a surface for the direction of rotation B is set to a vertical surface X with the other surface set to a tilt surface Y with respect to the peripheral plate 104c. And the tilt surface (y) and the vertical surface X form the sectional shape alternately connected interposing the peripheral plate 104c. That is, the blade 104a is vertically arranged in both the cooling and circulating sides for the direction of rotation B. And by forming the sectional shape of the blade 104a vertically for the direction of rotation in both the cooling and circulating sides, a blower function is improved as a centrifugal fan.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention has both a heat exchange function and an air blowing function.
- Concerns a dehumidifying clothes dryer equipped with a wing fan.

2. Description of the Related Art A conventional dehumidifying clothes dryer has a structure shown in FIGS. 5 to 7.

In Fig. 5, 1 is an outer frame, 2 is a heater that serves as a heat source, 3 is a rotating drum that stores and stirs clothes, and 4 is a cooling air (outside air) 5
7 is a fan cage that accommodates the double-wing fan 4, and 8 is a double-winged fan that exchanges heat with the circulating air 6 and has a blowing function. a partition plate that separates the circulating air 6;
9 is a circulation duct, 10 is a drain port, and 11 is a motor.

In the above configuration, when the motor 11 rotates, the rotating drum 39 and the double-winged fan 4 rotate by belt drive. When the double-blade fan 4 rotates, a cooling air (outside air) 5° circulating air 6 is generated, and the circulating air 6 passes through the circulation duct 9, reaches the heater 2, is heated by the heater 2, and is introduced into the rotating drum 3, where it wraps the clothes 12. A flow is formed in which the air is dried and returned to the double-blade fan 4 again.

On the other hand, the circulation 37 which exchanged heat with the clothing 12 and became hot and humid;
- The circulating air 6 exchanges heat with the cooling air 5, and the water vapor in the circulating air 6 becomes condensed water and is drained out of the outer frame 1 through the drain port 10. As shown in FIG. 6, the double-blade fan 4 has a configuration consisting of blades 4a and bosses 4b whose grooves are arranged radially from the central axis of rotation, and an outer circumferential plate 4C that supports the outer circumference of the blades 4a. The cross section of the blade 4a in the rotational direction is as shown in FIG. 7 on both sides with the outer peripheral plate 4c in between.
The surfaces were inclined (a, b) with respect to the outer peripheral plate 4C.

Problems to be Solved by the Invention In such a conventional configuration, the blades 4 of the double-wing fan 4
The airflow along a is generated by the centrifugal force of the inclined surface a with respect to the rotational direction A, but since it is an inclined surface, the airflow is lower than that of a centrifugal fan (the blades are perpendicular to the rotational direction). It also had the problem of being inferior in terms of wind pressure.

In view of the above problems, the present invention aims to improve dehumidification performance by increasing air volume and air pressure.

Means for Solving the Problems In order to achieve the above objects, the present invention provides blades of both wings and wings with a saw-tooth cross section consisting of a vertical plane perpendicular to the outer peripheral plate and an inclined plane. , it has a configuration in which vertical surfaces and inclined surfaces are arranged alternately with respect to the rotation direction.

Effect: With this configuration, the rotation direction plane of the blades of the double-winged fan is vertical on both the cooling side and the circulation side9, which increases the amount of air flow and also improves the wind pressure, and improves dehumidification performance by improving heat exchange efficiency. , it is also possible to shorten the drying time.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 3. Note that parts that are the same as those in the conventional configuration are given the same numbers, and their explanations will be omitted, and the structure W of the double-blade fan, which is a feature of the present invention, will be described below.

As shown in FIGS. 1 to 3, the configuration of the double-blade fan 104, which is a feature of the present invention, is such that the cross-sectional shape of the blade 104a is such that the surface with respect to the rotation direction B is a plane X perpendicular to the outer circumferential plate 104c, and the cooling side ), and the other surface is set at 1 inch to the inclined surface 5. On the other hand, on the circulation side, similarly, the surface facing the rotation direction B is a perpendicular surface X with respect to the outer circumferential plate 104c, and the other surface is an inclined surface Y. The cross-sectional shape is such that the inclined surface y and the vertical surface X are alternately connected with the outer circumferential plate 104C in between. That is, the blade 104c with respect to the rotation direction B
are arranged vertically on both the cooling and circulation sides.

The cross-sectional shape of the blade 104a is on the cooling side.

By making both circulation sides perpendicular to the rotation direction, the air blowing function as a centrifugal fan is improved. In FIG. 4, ■ indicates the P-Q characteristic curve of the conventional blade cross section, and @ indicates the P-Q characteristic curve of the present embodiment.

As is clear from this figure, according to this example, the air volume is (
Q2-Ql) is increasing.

Effects of the Invention As is clear from the above embodiments, according to the present invention, since the blades of the double-winged fan are formed with vertical surfaces, circulation,
Increased cooling air volume, clothes and circulating air.

The rate of heat exchange between circulating air and cooling air increases, resulting in shorter drying time and improved dehumidification performance.

Note that if the air blowing performance is the same as before, the rotation speed of the double-blade fan can be reduced by the amount of increased air volume, and the operating noise can be reduced.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a double-blade fan of a dehumidifying clothes dryer according to an embodiment of the present invention, Fig. 2 is a perspective view showing the blade shape of the double-blade fan, and Fig. 3 is a main part of the blade of the double-blade fan. 4 is a P-Q characteristic curve diagram of the double-blade fan, FIG. 5 is a vertical cross-sectional view of a dehumidifying clothes dryer, and FIG. 6 is a perspective view of the dual-blade fan of a conventional dehumidifying clothes dryer. , 7th
The figure is a sectional view of the main part of the blade of the double-winged fan. 1... Outer frame, 2... Heater, 3...
...Rotating drum, 104...Double wing fan, 104
a...Blade, 104c...Outer peripheral plate, x
, X... Vertical plane, y, Y... Inclined plane. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] A rotating drum that stirs the loaded clothes, a circulation fan that circulates hot air within the rotating drum, a double-wing fan that is integrated with the circulation fan for blowing cooling air, and this double-wing fan. The double-blade fan includes a partition plate provided on the outer periphery of the fan to separate the circulating air and the cooling air, and the double-blade fan supports blades made of corrugated thin plates provided so that the grooves are positioned radially from the central axis of rotation, and the outer periphery of the fan. and comprises an outer peripheral plate that separates the circulating cooling air,
A dehumidifying clothes dryer in which the cross-sectional shape of the blade is a sawtooth cross-section consisting of a perpendicular surface and an inclined surface with respect to the outer peripheral plate, and the perpendicular surfaces and inclined surfaces are arranged alternately with respect to the rotation direction.