JPH0652155B2 - Heat exchange type blower - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange type blower that performs heat exchange by the temperature difference between different working fluids.

2. Description of the Related Art Conventionally, a heat exchange type blower of this type is disclosed in, for example, Japanese Patent Laid-Open No. 57-
As shown in Japanese Patent No. 47187, the structure is as shown in FIGS. 3 and 4.

In FIGS. 3 and 4, 1 is an inner plate having a boss portion for fixing to a rotary shaft, and 2 is a disc-shaped impeller made of corrugated thin plates provided on the outer periphery of the inner plate 1. ,
The heat exchange action is mainly performed by this impeller. An outer peripheral member 3 is provided on the outer peripheral portion of the impeller 2, holds the impeller 2 portion with the inner side plate 1, and separates different flows on both sides of the impeller. Four
Indicates the rotation direction of the impeller 2. FIG. 4 shows an air blower incorporating the heat exchange type impeller of FIG. 3, and 5 limits the air flow to the impeller 2 provided on the outer peripheral portion of the inner side plate 1 from only one surface. The inner closing member closes the opening of the corrugated inner peripheral end of the plurality of groove portions 9 and 10 arranged so as to be located radially around the rotation axis. An outer closing member 6 is provided on the outer peripheral member 3, and closes the openings of the outer peripheral ends of the groove portions 9 and 10. Reference numeral 7 shows the flow of inflow air from the groove portion on one surface of the impeller 2, and 8 shows the flow of inflow air from the groove portion 10 on the other surface. Reference numeral 11 is a partition plate that completely separates the air flow on both sides of the blower, 12 is a casing that takes in air from both sides of the blower and diverts it, and 13 is a rotating shaft. When the rotary shaft 13 is rotated by the above-described configuration, the impeller 2 is rotated, and two different air flows 7 and 8 are generated in the groove portions 9 and 10 on both sides of the impeller 2, and at this time, they are adjacent to each other via the wall surface of the impeller 2. Heat is exchanged between the different air streams.

Problems to be Solved by the Invention However, in such a structure, since the heat exchange type blower rotates at high speed, the impeller 2 needs mechanical strength and precision, and the wall thickness of the impeller for heat exchange is reduced. There was a limit.

Further, since an air seal for separating the blown air on both sides of the blower is required, the cost becomes high, and there is a problem in reliability due to seal wear or the like depending on long-term use. Further, there is a problem that the starting torque of the motor is increased due to the sliding resistance of the seal.

Therefore, the present invention provides a heat-exchange-type blower that improves heat exchange performance, eliminates the need for a seal structure, improves reliability, and has a simple structure.

Means for Solving the Problems In order to solve this problem, the heat exchange type blower of the present invention is provided with two fans facing each other, which generate two different air flows, and has a corrugated shape between both fans. This is a configuration in which a heat exchange partition wall made of a thin plate is attached.

Action The action of this technical means is as follows.

That is, by rotating the two fans, different air fluids are caused to flow on both side surfaces of the unevenness of the heat exchanging means made of a corrugated thin plate,
The uneven side surface in contact with each path is contacted. At this time, heat exchange is performed by moving to the air of which the temperature is higher among the different air fluids having the lower heat through the heat exchange portion having irregularities.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a partially cutaway perspective view of the heat exchange type blower according to the present embodiment as viewed from the first path side. Reference numeral 13 is a first fan, and 15 is a rotation shaft, which serves as a rotation center of the first fan 13 and the second fan 14 (not shown in FIG. 1). The first fan 13 has blades 13a that generate an air flow when rotated, a disk-shaped fan body 13b that fixes the blades 13a, and the blades 13a.
And a ring portion 13c fixed to 3b. 17
Is a heat exchange means that is a thin plate that partitions the first path and the second path. The heat exchanging means 17 divides the first path and the second path and is located between the first fan 13 and the second fan 14 and has a partition wall portion 17c.
The heat exchange portion is continuous with the partition wall portion 17c and has a convex portion 17a and a concave portion 17b that are radially wavy from the vicinity of the outer periphery of the fans 13 and 14 arranged on both sides of the partition wall portion 17c.

FIG. 2 is a vertical sectional view of this embodiment. Reference numeral 24 denotes a casing that encloses the heat exchange type blower, and includes air intake ports 18 and 19 for the first and second fans 13 and 14, and a first
The air outlets 20 and 21 of the route and the second route are provided. 22 is a flow of air flowing through the first path, and 23 is
The flow of the air which flows through the 2nd path whose temperature is lower than the air of the 1st path is shown.

Next, the operation of the configuration of this embodiment will be described.

First, in the above structure, when the rotating shaft 15 rotates, the first fan 13 and the second fan 14 fixed to the rotating shaft 15 are fixed.
Rotates and air flow 2 from the first air intake 18
2, but an air flow 23 is generated from the second air intake 19. At this time, the respective air flows 22 and 23 are
The flows are adjacent to each other via the partition wall portion 17c of the heat exchange means. Then, corrugated irregularities 17a and 17b are radially formed in the heat exchange portion continuous to the partition wall portion 17c from the vicinity of the outer periphery of each fan 13 and 14 arranged on both sides of the partition wall portion 17c around the rotation axis. Therefore, it acts as an air guide, and guides the air flows 22 and 23 in the outer peripheral direction of the partition wall portion 17c without air loss. Partition wall 1
Since the 7c and the heat exchange part completely partition the first path and the second path, the air flows 22 and 23 flow through the respective paths without being mixed, and the air outlet port 20,
It is discharged from 21 to the outside of the casing.

In this state, if there is a temperature difference between the air flows 22 and 23,
Since the air (22, 23) of the first and second paths flows while coming into contact with the heat exchange section from both sides of the partition wall section 17c, the first and second air passes through the uneven heat exchange section (17a, 17b). The heat of the air 22 flowing in the path is transferred to the air 23 flowing in the second path to perform heat exchange. Therefore, the air 22 in the first path loses heat and its temperature drops,
The air 23 in the second path is supplied with the amount of heat and its temperature rises.

In this embodiment, the convex portion 17a and the concave portion 17b are provided on both sides of the heat exchange portion, but the same effect can be obtained even if they are provided on only one side.

Further, in the present embodiment, the corrugated shape is changed from the convex portion 17a to the concave portion 1.
Although the shape is continuously inclined up to 7b,
The same effect can be obtained even if a and a recess 17b are discontinuous in shape, for example, the inclination angles of the protrusion 17a and the recess 17b are different, or a flat portion is provided between the protrusion 17a and the recess 17b.

Further, the material of the heat exchange means 17 can be made of metal, resin, paper or the like as long as it is a thin plate (several mm or less).

EFFECTS OF THE INVENTION As described above, the present invention has two opposing
Since the heat exchange partition wall is provided between the individual fans, and the heat exchange part having the radial wavy unevenness is continuously provided on the partition wall, the heat exchange area can be widened, Exchange performance can be greatly improved.

Further, since the strength is improved by providing the heat exchanging portion with a wave-shaped unevenness around the rotation axis, the wall thickness of the partition wall can be extremely thinned, and the heat exchange efficiency is further improved, and Since the gap between the two fans can be minimized, the depth can be made compact when it is installed in the blower.

Furthermore, since the heat exchange partition wall is provided in the intermediate portion of both fans, the opening area of the penetrating portion of the fan shaft can be reduced to near the fan shaft diameter. Therefore, a seal structure for separating two different air flows is not required, the structure is simplified, reliability is improved, and the driving torque for rotating the fan can be suppressed to be low, and the cost can be reduced. .

Further, since the radial corrugated concavo-convex portion provided in the vicinity of the outer peripheral portion of the fan also serves as an air guide for smoothing the flow of air, heat exchange loss is reduced and the device can be made compact. Further, since the groove portion also improves the strength of the partition wall, the fan can be rotated at a high speed to increase the air volume, and the heat exchange performance can be further improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a heat exchange type blower according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the heat exchange type blower, and FIG. 3 is an impeller of a conventional heat exchange type blower. Perspective view, 4th
The figure is a vertical cross-sectional view of the heat exchange type blower. 13, 14 ... Fan, 17 ... Heat exchange partition wall, 17a
...... Convex part, 17b ...... Concave part, 22,23 ...... Two different air flows, 24 ...... Casing.

Claims (1)

[Claims] 1. A first path through which a working fluid flows, and the first path.
A second path through which a working fluid having a temperature lower than that of the working fluid flowing through the first path, a first fan for blowing the working fluid in the first path, and a working fluid in the second path are blown, A second fan arranged to face the first fan; heat exchanging means for exchanging heat between the working fluid in the first path and the working fluid in the second path; and the first and second Of the fan has an operable space and encloses the heat exchanging means, and the heat exchanging means divides each path and is located between the fans and a partition wall portion, and the partition wall portion is continuous with the partition wall portion. A heat exchanging portion having a wave-like unevenness radially from the outer periphery of each fan disposed on both sides of the partition wall portion, and the casing forms the first and second paths together with the partition wall portion of the heat exchanging means. Completely partition, heat exchanger except for the working fluid inlet and outlet Heat exchange blower wrap tightly closed.