JPH0333978B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type air blower used in a dehumidifying type clothes dryer or a ventilation device capable of performing heat exchange.

Conventional configuration and its problems A conventional heat exchange type blower is shown in Fig. 1. By rotating an impeller 1 having wave-shaped blades and attached to a rotating shaft 1a, a ventilation passage 4 is formed by a partition plate 2 and two types of casings 3a and 3b.
Air flows 5a and 5b are generated at a and 4b, respectively. Heat exchange is performed between these two types of air via the blades. FIG. 2 shows an impeller used in a conventional heat exchange type blower, and FIG. 3 shows a portion of the impeller. The wave-shaped blade 6 has grooves 6a radially extending from the rotation center 7, and allows heat exchange between two types of air flowing along both surfaces. Reference numeral 8a designates an inner peripheral plate, on the outer periphery of which the blade 6 is connected, and at the outer peripheral end of the inner peripheral plate 8a is an inner peripheral member 8 that airtightly closes the inner peripheral end of the blade 6.
has been established. 9a is an outer peripheral plate, and blade 6
The outer circumferential member 9 extends from the outer circumferential plate 9a to the corner portion at the end of the outer circumference of the groove 6a, with the outer circumferential plate provided at the middle in the thickness direction of the outer circumferential plate as a boundary.
It is closed airtight. Thereby, the two types of air flows 5a and 5b flowing through the groove portion 6a do not mix due to the action of the inner peripheral member 8 and the outer peripheral member 9.

In the conventional heat exchange type blower having the above configuration, when the impeller 1 rotates, two types of air flows 5a and 5b are generated. Swirls occur in the air suction portions 10a, 10b and air discharge portions 11a, 11b of 6a. The air suction parts 10a, 10b and the air discharge parts 11a, 1
1b indicates a corner portion of the groove portion 6a on the inner and outer peripheral members 8 and 9 side. The vortex generated here does not contribute to heat exchange between the two types of air flow at all, effectively reducing the effective heat exchange area, and furthermore, this vortex has a large resistance to each of the two types of air flow. This results in two types of reductions in air flow rate. For this reason, the conventional heat exchange type air blower has a drawback that its air blowing capacity is low and its heat exchange capacity is not sufficient.

Purpose of the Invention The present invention eliminates such conventional drawbacks by making the closed portion of the groove of the blade, which is the air suction portion and the air discharge portion, into an air guide portion having a curvature in the radial direction of the impeller. This provides a heat exchange type blower with high air blowing capacity and excellent heat exchange capacity at a low cost.

Structure of the Invention In the heat exchange type blower of the present invention, the closed portion, which is the air suction portion and the air discharge portion of the groove portion of the blade constituting the impeller for heat exchange, is an air guide portion having a curvature in the radial direction of the impeller. This creates a smooth air flow without creating eddies in the grooves, reduces air passage resistance, improves air blowing capacity, and expands the effective heat exchange area. It also increases exchange capacity.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below based on the accompanying drawings. 4 and 5, the overall structure of the heat exchange type blower is the same as the conventional example shown in FIG. 1, so the explanation will focus on the different parts. 12 is a wave-shaped blade with grooves 12a arranged radially from the center of rotation; 13a is an inner peripheral plate; the blades 12 are connected to the outer periphery of the inner peripheral plate;
An inner peripheral member 13 for airtightly closing the inner peripheral end of the blade 12 is provided at the outer peripheral end of the blade 3a. Reference numeral 14a denotes an outer circumferential plate, which is provided at the middle of the blade 12 in the thickness direction, and extends from the outer circumferential plate 14a to the groove 12.
A portion of the groove portion on the outer periphery up to the corner portion is hermetically closed by the outer peripheral member 14.
These blades 12, inner peripheral member 13, and outer peripheral member 14 are integrally formed of a material such as resin, and constitute an impeller 18 for heat exchange. This impeller 1
8 rotates to create two types of air flow 15a,
15b is generated, and heat exchange is performed between both airs via the blades 12. As shown in FIG. 5, the impeller 18 has air intake portions 16a, 16b and air exhaust portions 17a, 17b, that is, air guide portions A having a curvature in the radial direction of the impeller. This makes the air flow very smooth. For this reason, the air intake portions 16a, 16b or the air exhaust portion 17
The undulations seen in a and 17b are eliminated, the air passage resistance is reduced, the air volume is increased, and the area that does not contribute to heat exchange is reduced, so it is effective even though the apparent heat transfer area is reduced. The heat exchange area is expanded and the heat exchange capacity can be improved.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention has an air guide portion having a curvature in the air suction portion and the closed portion of the air discharge portion of the groove portion of the wave-shaped blade in the impeller. and
With this configuration, it is possible to provide a heat exchange type blower with smooth air flow, high blowing capacity, and excellent heat exchange capacity at a low cost.

[Brief explanation of drawings]

Figure 1 is a side sectional view of a conventional heat exchange type blower.
Fig. 2 is an external perspective view of the impeller for heat exchange, Fig. 3 is a partial sectional view of the impeller, and Fig. 4 is an external appearance showing an embodiment of the impeller for heat exchange used in the heat exchange type blower of the present invention. The perspective view and FIG. 5 are partial sectional views of the same impeller. 12...blade, 12a...groove, 13...
Inner peripheral member, 14...Outer peripheral member, 16a, 16b...
...air suction part, 17a, 17b...air discharge part,
A...Air guide section.

Claims (1)

[Claims] 1.Equipped with an impeller that has an air blowing function on both sides and a heat exchange function between the air flowing on both sides. A wavy blade having a groove with a tapered cross-sectional shape, and an outer circumferential plate continuous to the outer periphery of the blade, the inner circumferential plate and the outer circumferential plate being located midway in the thickness direction of the blade. The area from both circumferential plates to the corner at the end of the groove is hermetically closed, and the inner and outer circumferential closed portions are curved in the radial direction of the impeller to guide air. Heat exchange type blower.