JPS59217495A - Heat exchange type impeller - Google Patents

Abstract

PURPOSE:To improve heat exchanging capability and contrive cost down by a method wherein blades and blocking sections, blocking corner sections of wave form at the outer peripheral ends of the blades, are constituted integrally by resin. CONSTITUTION:The blade 1' is constituted of a wavy thin plate and the impeller is constituted integrally by inserting the blade 1' into an inner peripheral member 2 and an outer peripheral member 3 when the inner peripheral end and the outer peripheral end are formed by resin. According to this method, adhering property between members is improved and mixing of two different kinds of airstreams is eliminated, therefore, the heat exchanging capability may be improved and the cost down may be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in a dehumidifying clothes dryer to exchange heat between drying air and cooling air to remove moisture from the drying air.
Furthermore, the present invention relates to a heat exchange type impeller that exchanges heat of indoor air that is discharged by a ventilation device with a heat exchange function so that the heat is not wastefully discharged to the outside.

Conventional Structure and Problems Conventionally, a blower incorporating this type of heat exchange type impeller is as shown in FIG. 1, where 1 is made of a metal material with good thermal conductivity, such as copper or aluminum.

A blade formed of a thin plate made of stainless steel or the like into a corrugated shape, 2 an inner peripheral member made of resin configured to support the blade 1 from the inner periphery, and 3 protruding vertically alternately so as to support the blade 1 from the outer periphery. 4 and 5 are casings 6 and 6 which form two types of air ventilation paths that flow on both sides of the blade 1;
is a partition plate that separates these two types of airflow through a ventilation passage.

8 is an air flow inlet formed in the casings 4 and 6;
9 and 10 are exhaust ports, 11 is a rotating shaft, and 12 and 13 are air flows on both sides of the blade 1.

FIG. 2 shows a heat exchange impeller consisting of blades 1, inner and outer peripheral members 2, 3, and the inner peripheral member 2 has a boss 14 for fixing the heat exchange impeller to the rotating shaft 11 and the blades 1.
A member 16 that closes and supports the inner circumferential end of the housing is integrally formed of resin. Reference numeral 16 denotes the above-mentioned comb-like members which protrude alternately upward and downward and support the outer circumferential end of the blade 1, and are formed on the outer circumferential member 3.

As shown in FIG. 3, the comb-shaped members 16 alternately block the wave-shaped portions at the outer peripheral end of the blade 1, upper and lower, and prevent the mixing of two types of air flows 12 and 13 flowing along both sides of the blade 1. It is prevented.

In the above configuration, when the heat exchange impeller is rotated, two types of air flows 12°13 are generated on both sides of the blade 1,
These two air streams 12, 13 exchange heat via the blades 1.

Conventionally, the blade 1 has been made of copper for rust prevention, or a metal material such as aluminum or stainless steel whose surface has been subjected to alumite treatment. For this reason, the heat exchange impeller becomes very expensive, and furthermore, the weight of the heat exchange impeller increases, the torque required for rotation is large, and a high-torque motor is required, making the heat exchange type blower itself expensive. It had become. In addition, the load on the bearing that holds the heat exchange impeller is large, and it is likely to wear quickly and cause problems in rotational performance. On the other hand, since the inner circumferential member 2 and the outer circumferential side 3 are made of resin, their adhesion to the blade 1 formed of a metal material is poor. Moreover, the bond between the blade 1 and the inner and outer circumferential members 2 and 3 tends to come off due to the difference in thermal expansion coefficients. However, there was a problem in that the two types of air flows on both sides of the blade 10 mixed with each other, resulting in a decrease in heat exchange ability.

Purpose of the Invention The present invention aims to reduce costs by integrally constructing the blade and the closing part that closes the wave-shaped course part at the outer peripheral end of the blade with resin, and improves rotational performance by reducing the weight of the heat exchange impeller. It is an object of the present invention to provide a heat exchange type blower itself at low cost without any trouble, and to improve heat exchange capability by eliminating mixing of two types of air flows.

Composition of the Invention The heat exchange type impeller of the present invention includes blades made of wavy thin blades with grooves located radially from the center of the rotating plate, and the blades close the wavy corner side of the outer peripheral end. The impeller is open, and the blades and the closed part are integrally made of resin, which reduces costs, reduces the weight of the impeller, and improves heat exchange efficiency.

DESCRIPTION OF EMBODIMENTS The present invention will be described in detail below. In FIG. 4, parts that are the same as those in FIGS. 1 to 3 are given the same reference numerals, detailed explanations are omitted, and differences will be mainly explained.

1' is a blade made of a thin plate made of resin (e.g., polypropylene, ABS resin) molded into a wave shape, which is further configured into an annular shape with grooves located radially from the center of rotation, and the inner and outer edges of the blade. is integrated into the inner circumferential member 2 and the outer circumferential member 3 when the inner circumferential member 2 and the outer circumferential member 3 are molded with resin, thereby forming a heat exchange type impeller.

FIG. 6 shows an embodiment different from FIG. 4,
The blade 1', the inner circumferential member 2, and the outer circumferential sound μ material 3 are integrally formed of resin to form a heat exchange type impeller.

In any of the embodiments shown in FIGS. 4 and 6 described above, at least one part of the blade 1' is disposed of in order to release the air flow along the groove portion from the outer peripheral end of the blade 1' to the outside without mixing the air flow. The wave-shaped corner side of the outer peripheral end is closed with a member 16, and the other part is open.
' and the member 16 are integrally made of resin, regardless of the molding method.

Figure 6 shows the heat transfer rate when heat is exchanged between two types of air flows flowing on both sides of the blade 1' through the blade 1', and the horizontal axis shows the thickness t of the blade 1'. (T
Ml), and the vertical axis shows the heat transfer rate K (Kca2/m”hr
'c) was taken. In the figure, characteristic a indicates the case where the blade is made of metal, and characteristic A indicates the case where the blade is made of resin. Both characteristics a,
As is clear from b, when the thickness of the blade is around one cylinder, the heat transfer rate hardly decreases even if the blade material changes from metal to resin, and therefore the heat exchange ability hardly decreases. On the contrary, in each embodiment of the present invention, the blade 1' and its closed part are integrally made of resin to improve adhesion, so two types of air flows do not mix, and the heat exchange capacity is improved. can be improved.

Effects of the Invention As described above, according to the heat exchange type impeller of the present invention, the wavy corner side of the outer peripheral end of the blade, which is made of a wavy thin plate, is closed and the other part is open, and the blade and the closed part are integrated with resin. Because of this configuration, there is no mixing of two types of airflow, improving heat exchange capacity and significantly reducing costs.Furthermore, by reducing the weight of the heat exchange impeller, it is possible to reduce the burden on motors and bearings. This can greatly reduce the burden. In addition, when using metal, there is no problem of rusting, which is unavoidable, but if resin is used, there is no problem at all, and the effect is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a conventional heat exchange type blower, Fig. 2 is an external perspective view of a heat exchange impeller used in the heat exchange type blower, and Fig. 3 is a cross section of the heat exchange impeller in the mating axis direction. figure,
Fig. 4 is an exploded perspective view of the main parts of a heat exchange impeller according to an embodiment of the present invention, Fig. 5 is a perspective view of main parts showing another embodiment of the heat exchange impeller, and Fig. 6 is the thickness of the blades and heat transfer rate. FIG. 1'...Blade, 2...Inner peripheral member,
3...Outer peripheral member. Name of agent: Patent attorney Toshio Nakao and one other person Figure 2 Figure 2 2 -fO Figure 5 3 Figure 6

Claims (1)

[Claims] It has a blade made of a wavy thin plate with grooves located radially from the center of rotation, and this blade closes the wavy corner side of the outer circumferential end and leaves the other part open, and the blade and the closed part are integrally made of resin. heat exchange type impeller.