JPH0719770A - Rotary type latent heat exchanger - Google Patents

Abstract

PURPOSE:To achieve latent heat exchange of high efficiency by a method wherein, in a disk-shaped rotary type latent heat exchanger which has a large number of small holes passing through the opposite end surfaces thereof and which enables latent heat exchange by the use of absorbent materials in the small holes as a medium, the size of the holes on the end surface part on the side of air inlet is made larger than that of the holes of the other part. CONSTITUTION:A rotary type latent heat exchanger 1 consists of a first porous body 2 having a predetermined diameter, second porous bodies 3, 3 which have the same diameter as the body 2 and which are closely connected to the opposite ends of the body 2 respectively, and an axial rod 4 which is disposed through the center of the body 2 and the bodies 3, 3. The first body 2 is formed in such a manner that an absorbent material in the form of a plane is superposed on a corrugated material provided by forming the absorbent material into a corrugated form to form a one-side corrugated board-like belt-shaped plate, which plate is wound into a helical form. The planar material and corrugated material are impregnated with liquid absorbent material. The second bodies 3, 3 having holes larger than the holes of the first body 2 are disposed on the opposite sides of the first body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary latent heat exchanger which mainly performs latent heat exchange.

[0002]

2. Description of the Related Art A rotary type latent heat exchanger used for exchanging latent heat (moisture) between air, for example, indoor air and outdoor air, is shown in FIG.

This latent heat exchanger 11 is a strip-shaped flat substrate 1.
2a and a corrugated base material 12b formed into a corrugated shape are overlapped with an adhesive to form a one-sided corrugated strip 12 (see FIG. 4), and then the plate 12 is covered with an adhesive around the core. It is manufactured by spirally winding up to a predetermined diameter via a shaft or bearing 11a at the center of winding. A hygroscopic material such as paper is generally used for the flat substrate 12a and the corrugated substrate 12b, and these are impregnated with a liquid hygroscopic material such as lithium chloride before or after plate formation or after winding (Japanese Patent Laid-Open No. 58-38149). Gazette, ibid. 55-31
No. 245, No. 61-252497, etc.).

The latent heat exchanger 11 has a large number of small holes penetrating between the end faces, and is arranged rotatably across two air passages when used, and the air flowing through one of the air passages. The latent heat (moisture) taken from the air is applied to the air flowing through the other air flow path to enable latent heat exchange between the air.

[0005]

Since the above-mentioned conventional latent heat exchanger has a structure in which air flows from one end surface to the other end surface, the moisture absorbent at the end surface portion on the air inflow side is quickly saturated in the moisture adsorption region. As a result, the saturation of the hygroscopic material in other parts tends to be slower than that, and in the moisture desorption area, the hygroscopic material in the end surface part on the air inflow side is quickly regenerated and the hygroscopic material in the other parts is regenerated more than that. It is easy to be late. That is, there is a drawback in that only the moisture absorbing material at the end surface portion on the air inflow side is used for latent heat exchange, but the moisture absorbing material at other portions is not fully used, and it is difficult to obtain the desired latent heat exchange efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotary latent heat exchanger capable of realizing latent heat exchange with high efficiency.

[0007]

In order to achieve the above object, in Claim 1, a large number of small holes penetrating between the end faces are provided, and a disc-like shape capable of exchanging latent heat using a moisture absorbent in the small holes as a medium. In the rotary latent heat exchanger, the hole shape of the end surface portion on the air inflow side is formed to be larger than the other portions.

According to a second aspect of the present invention, the rotary latent heat exchanger according to the first aspect has a first porous body having a large number of small holes penetrating between the end faces, and a hole shape more than that of the first porous body. The second porous body is provided with a large number of large holes penetrating between the end faces.

In the third aspect, a gap is provided between the first porous body and the second porous body in the rotary latent heat exchanger according to the second aspect.

[0010]

According to the rotary latent heat exchanger of the present invention, the air passage speed of the end face portion on the air inflow side having a large hole shape is made faster than that of the other portion, and the end face portion is made larger. It is possible to efficiently utilize latent heat exchange by balancing the utilization rates of the hygroscopic material and other parts of the hygroscopic material and using the entire hygroscopic material without imbalance.

According to the rotary latent heat exchanger of the third aspect, in addition to the above action, turbulent flow is generated in the air flowing from the second porous body to the first porous body in the gap between the two porous bodies. Uniformity of the humidity distribution can be achieved by the mixing and stirring action of the turbulent flow.

[0012]

1 and 2 show an embodiment of the present invention. FIG. 1 is a perspective view of a latent heat exchanger, and FIG. 2 is a sectional view of the latent heat exchanger shown in FIG.

The rotary type latent heat exchanger 1 shown in FIG. 1 has a first porous body 2 having a predetermined diameter and the same diameter connected to both ends of the first porous body 2 coaxially without any gap. Second porous body 3,
3 and a shaft rod 4 penetratingly arranged in the central portions of the first porous body 2 and the second porous bodies 3 and 3.

The first porous body 2 is a plate similar to that shown in FIG. 4, more specifically, a hygroscopic flat base material made of paper or non-woven fabric whose main component is inorganic fibers or organic fibers, and a wave surface formed by corrugating the same. It is formed by spirally or concentrically winding a single-sided corrugated belt-shaped plate, which is formed by stacking a base material with an adhesive, around the core material with the adhesive until a predetermined diameter is reached. The flat base material and the corrugated base material are impregnated with a liquid hygroscopic material such as lithium chloride or magnesium chloride before or after the plate is formed or after being wound, or a powdery or granular hygroscopic material such as silica gel or zeolite is adhered to the surface thereof.
The first porous body 2 has a disk shape having a predetermined thickness, and has a large number of small holes 2a having a substantially triangular cross section and penetrating between the end faces.

The second porous body 3 is a band-shaped plate using a wavefront base material having a wave pitch and height larger than that of the first porous body 2, and the first porous body is formed around the core material with an adhesive. It is formed by spirally or concentrically winding up to the same diameter as 2. Similar to the first porous body 1, the planar base material and the corrugated base material are impregnated with a liquid hygroscopic material such as lithium chloride or magnesium chloride before or after the plate is formed or after winding, or a powdery or granular hygroscopic material such as silica gel or zeolite is used on the surface. Is glued to. The second porous body 3 has a disk-like shape having a smaller thickness than the first porous body 2, and has a large number of small holes having a substantially triangular cross section and having a larger hole shape than the small holes 2a of the first porous body 2. Three
a is penetrated between the end faces.

When used, this latent heat exchanger 1 is rotatably arranged so as to straddle two air flow passages in the same manner as in the conventional case, and the latent heat (moisture) taken from the air flowing through one air flow passage is transferred to the other air flow passage. By giving the air flowing through the flow path, it is possible to exchange latent heat between the air.

According to the latent heat exchanger 1 described above, the second porous bodies 3 and 3 having a pore shape larger than that of the first porous body 2 are arranged at both ends of the first porous body 2. During the latent heat exchange, the air velocity passing through the second porous bodies 3 and 3 is higher than the velocity of the first porous body 2 located in the center.

Therefore, in the moisture adsorption region, the saturation rate of the moisture absorbent of the second porous body 3 located on the air inflow side decreases, and the saturation rate is balanced with the saturation rate of the moisture absorbent of the first porous body 2. . Further, in the moisture desorption region, the regeneration speed of the hygroscopic material of the second porous body 3 located on the air inflow side decreases, and the regeneration speed balances with the regeneration speed of the hygroscopic material of the first porous body 2. As a result, the hygroscopic materials of the first porous body 2 and the second porous bodies 3 and 3 are uniformly used for latent heat exchange, and the latent heat exchange efficiency of the latent heat exchanger 1 itself is significantly improved.

5 and 6 show another embodiment of the present invention. FIG. 5 is a perspective view of the latent heat exchanger, and FIG. 6 is a sectional view of the latent heat exchanger shown in FIG. The structures of the first and second porous bodies of this embodiment are the same as those of the above-mentioned embodiment, so that the same reference numerals are used here and the description thereof is omitted.

The rotary type latent heat exchanger 1'shown in FIG.
A first porous body 2 having a predetermined diameter, second porous bodies 3 and 3 having the same diameter, which are coaxially connected to both ends of the first porous body 2 with a gap S having a predetermined width, The shaft rod 4'through which is disposed in the central portion of the first porous body 2 and the second porous bodies 3, 3 and the above-mentioned gaps on the outer peripheral surfaces of the first porous body 2 and the second porous bodies 3, 3. It is composed of a strip-shaped member 5 wound and arranged so as to close S.

The pore shape of the small holes 3a of the second porous bodies 3 and 3 is
It is larger than the small hole 2a of the first porous body 2 as in the above embodiment. Further, the gap S between the first porous body 2 and the second porous bodies 3, 3 has a pore shape of the small holes 3a of the third porous bodies 3, 3, specifically, the third porous bodies 3, 3 Air that is larger than the height of the wavefront base material used for the above and that flows from the second porous body 3 toward the first porous body 2 can generate turbulent flow in the gap S.

This latent heat exchanger 1'is also rotatably arranged so as to straddle two air passages during use, as in the above embodiment, and removes latent heat (moisture) taken from the air flowing through one air passage. By supplying air to the other air flow path, latent heat exchange between the air is possible.

According to the above-mentioned latent heat exchanger 1 ', turbulent flow is generated in the air flowing from the second porous bodies 3, 3 to the first porous body 2 in the gap S between the two porous bodies during the latent heat exchange, Uniformity of the humidity distribution can be achieved by the mixing and stirring action of the turbulent flow. That is, even when the humidity distribution of the air passing through the second porous bodies 3 and 3 is uneven, it is possible to eliminate the unevenness by the above mixing and stirring action and then send the air to the first porous body 2. Therefore, the efficiency of latent heat exchange can be further enhanced. Other actions and effects are similar to those of the above embodiment.

In the above embodiment, an example in which a strip plate having a corrugated one-sided cardboard is wound to form the first and second porous bodies is shown, but both porous bodies are circular or polygonal pipes having a predetermined length. A large number of materials may be bundled in parallel and connected, and similar porous shape change can be imparted by using both porous bodies having different pipe diameters (shapes).

Further, the bidirectional flow type in which the second porous bodies are arranged on both end sides of the first porous body has been exemplified, but in the case of the unidirectional flow type, the second porous body is provided only on the air inflow side. The body may be placed.

Further, the present invention can be variously modified without changing the scope of the invention, such as changing the shaft rod shown in each embodiment to a bearing or excluding them.

[0027]

As described above in detail, according to the rotary type latent heat exchanger of the first to third aspects, the speed of the air passing through the small holes is changed so that the entire hygroscopic material can be used evenly. Therefore, latent heat exchange can be realized with high efficiency.

According to the rotary type latent heat exchanger of claim 3, the humidity distribution of the air flowing from the second porous body to the first porous body is made uniform to further enhance the latent heat exchange efficiency. Can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a latent heat exchanger showing an embodiment of the present invention.

FIG. 2 is a sectional view of the latent heat exchanger shown in FIG.

FIG. 3 is a perspective view of a latent heat exchanger showing a conventional example.

FIG. 4 is a partial perspective view of a plate.

FIG. 5 is a perspective view of a latent heat exchanger showing another embodiment of the present invention.

6 is a sectional view of the latent heat exchanger shown in FIG.

[Explanation of symbols]

1, 1 '... latent heat exchanger, 2 ... first porous body, 2a ... small hole, 3 ... second porous body, 3a ... small hole, S ... gap.

Claims (3)

[Claims] 1. A disk-shaped rotary latent heat exchanger in which a large number of small holes penetrating between the end faces are provided and latent heat can be exchanged by using a moisture absorbent in the small holes as a medium. A rotary latent heat exchanger characterized in that the shape is formed larger than other parts. 2. The rotary type latent heat exchanger according to claim 1, wherein the first porous body has a large number of small holes penetrating between the end faces, and a large number of holes having a larger hole shape than the first porous body. A rotary latent heat exchanger, comprising: a second porous body having small holes penetrating between the end faces. 3. The rotary latent heat exchanger according to claim 2, wherein a gap is provided between the first porous body and the second porous body.