JPH0610586B2 - Heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a plate fin type heat exchanger having a laminated structure.

[Conventional technology]

The plate-fin type heat exchanger has a large heat transfer area per unit volume and is widely used as a relatively small and highly efficient heat exchanger. Due to the difference in the flow of two fluids to be heat-exchanged. It can be divided into three types: counter-current type, counter-current type, and orthogonal (oblique) flow type. The counter flow type and the cross flow type are often used for the air conditioner, but until now, the basic configuration thereof is a plate (101) for separating two fluids to be heat-exchanged as shown in FIG. Is formed by sandwiching corrugated plate-shaped fins (102) forming a double-row parallel flow path. In the one for air conditioning shown in FIG. 1, the plate (10
1) is made of a paper material based on Japanese paper that combines heat transfer and moisture permeability, and the fin (102) is also obtained by processing a paper material similar to the plate (101) into a corrugated plate. But
The manufacture of the corrugated plate-shaped fins (102) is actually accompanied by many difficulties, and the manufacturability is poor.

[Outline of Invention]

The present invention has been made for the purpose of solving the above-mentioned conventional problems, and a passage element forming a parallel flow path in a gap between flat plate-like plates having heat conductivity and moisture permeability,
(EN) A heat exchanger that is easy to manufacture and has good structural stability is formed by integrally molding a synthetic resin in a cross beam shape in which multiple rows of ribs are connected at both ends by a connecting structure.

Example of Invention

Next, the structure of the present invention will be specifically described based on an embodiment shown in the drawings.

The heat exchanger of the embodiment shown in the drawings is an air-to-air heat exchanger used in the field of air conditioning, and the heat exchanger of FIG. 2 is a direct heat exchanger in which two fluids to be heat-exchanged generally cross at right angles. The AC type, and the one shown in FIG. 5 is the counterflow type in which two fluids to be heat-exchanged flow in opposition.

First, a cross-flow type heat exchanger (1) will be described as a row of heat exchangers in which two fluids flow at an angle. This heat exchanger (1) has a passage element (4) mainly composed of linear ribs (3) as fins arranged in a certain direction at equal intervals between a plurality of plates (2), Ribbed (3)
It can be obtained by pinching so that the directions of are shifted by 90 degrees for each layer. The plate (2) is a thin flat plate of a flexible material having a thickness of about 0.05 to 0.2 mm, which has both heat conductivity and moisture permeability, and is a member for partitioning two fluids to be heat-exchanged. As shown in FIG. 4, the passage element (4) is a synthetic resin integrally molded product in which a plurality of rows of ribs (3) are linearly formed in a plane area corresponding to the plate (2). The height (h) (defines the distance between plates (2)) and the pitch (distance) (d) are the parallel gaps of the double rows through which the fluid to be heat-exchanged passes and the opposing gaps of the plate (2). If it is too large, the rectifying effect of the air flow in the parallel flow path is small, and if it is too small, the static pressure loss in the parallel flow path becomes large, so it is determined in the range of about 1 to 10 mm. The thinner the ribs (3) and the plates (2), the better the heat exchange results will be. However, in reality, there is a demand for maintaining their mechanical strength. I can't. But ribs (3)
Is formed of synthetic resin, and the ribs (3) are connected to each other at both ends in a bridging manner by a connecting structure (5).
In the heat exchanger (1) of this example configured by stacking the plate (2) with the plate (2), the rib (3) is a synthetic resin, and the connection structure (5) that closely adheres to one side of the plate (2) is used. Since they are connected to each other, the mechanical strength of the plate (2) can be supplemented by the ribs (3), so that the mechanical strength of the plate (2) can be correspondingly reduced and thinned. Each rib (3) wins the plate (2) in an independent form except for both ends, but the structural stability of the heat exchanger as a whole is strong due to the strong connection with the plate (2) due to the connection structure (5). high. The connecting structure (5) should be as thin as possible as long as the bonding strength between the ribs (3) can be obtained.

The direction of the ribs (3) of the passage element (4) is changed layer by layer.
When sandwiched between the plates (2) so as to be 90 ° apart and adhered, a cross flow type heat exchanger (1) as shown in FIG. 2 is obtained. Then, if the primary air is passed through the parallel flow passages of one system in the same direction and the secondary air is passed through the parallel flow passages of the other system, the primary air and the secondary air will flow in the same way as this type of previous models. Total heat exchange with the air is possible.

Next, the counterflow type heat exchanger (1A) shown in FIG. 5 will be described. This heat exchanger (1A) also includes a passage element (4A) formed by linearly integrally forming ribs (3), which are made of synthetic resin and connected to each other at both ends, in a plurality of rows at equal intervals between the plates (2). The heat exchanger (1) has the same structure as the heat exchanger (1) of the previous example in that it can be obtained by a laminated stack. The difference between this heat exchanger (1A) and the one in the previous example is that the rib (3) of the passage element (4A) is formed to have a length corresponding to approximately half of the plane area of one side of the plate (2), The staggered passage elements (4A) are laminated between the plates (2) with the directions of the ribs (3) parallel. That is, the passage element (4A) of this heat exchanger (1A) has a size corresponding to approximately half the plane area of the plate (2) as shown in FIG. 6, and the parallel flow path formed by this is a plate. It exists for half of (2) and the other half has a configuration without parallel channels. Then, as shown in FIG. 5, the passage elements (4A) are stacked in a zigzag manner, and the parallel flow paths formed by the ribs (3) between the plate (2) and the plate (2) appearing on the opposite end faces. Between the primary air and the secondary air by closing the part that does not appear on the end face with a control member or a blocking plate and letting the primary air and the secondary air pass from the opposite direction to each parallel flow path facing the opposite end face. It is possible to perform heat exchange by the counterflow method in.

Each of these heat exchangers (1) and (1A) is obtained by stacking the plate (2) and passage elements (4) and (4A), and each rib (3)
Is connected at the end side by the connecting structure (6), the parallel flow path (5) constituted by the rib (3) has high structural stability, and the passage element (4) is strong. Since the plate (2) can be appropriately selected with a material having excellent heat conductivity and moisture permeability, the range of selection of the material can be expanded, an inexpensive material can be obtained, and the strength of the passage element (4) can be obtained. Can be fully secured, so it can be used to make plates even thinner and more flexible.

[Effects of the Invention] As is apparent from the description of the embodiments, the heat exchanger of the present invention has ribs made of synthetic resin arranged linearly at predetermined intervals between plates having heat conductivity. Since the passage element in which the ribs are integrally connected to each other in a bridging shape at the end portion by the connecting structure has a sandwiched layer structure, the passage element can be easily manufactured and the manufacturability is good. Also, because the ribs are connected at their ends by a connecting structure, the ribs have high structural stability, and the mechanical strength can be imposed on the ribs, so the plate can be made thinner, and the plate can be made even thinner. It can also be made flexible and can improve the heat exchange function.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cross-flow heat exchanger as a conventional example, FIG. 2 is a perspective view showing a cross-flow heat exchanger as an application example of the present invention, and FIG. FIG. 4 is a perspective view showing the element alone, FIG. 4 is a sectional view showing the same passage element, FIG. 5 is a perspective view of a heat exchanger showing another embodiment of the present invention, and FIG. It is explanatory drawing shown independently. In the figure, (1) and (1A) are heat exchangers, (2) is a plate,
(3) is a rib, (4) and (4A) are passage elements, and (5) is a connection structure. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (5)

[Claims] 1. A parallel flow path comprising a plurality of flat plates having heat conductivity and moisture permeability, and passage elements sandwiched between the plates, wherein the passage elements sandwich a plurality of parallel passages formed by the passage elements. A heat exchanger configured to form each of the passage elements of a cross beam shape in which linear ribs arranged in a row at predetermined intervals are connected in a bridging manner by a connecting structure at their both ends. A heat exchanger characterized by being formed as an integrally molded product made of synthetic resin. 2. The heat exchanger according to claim 1, wherein the ribs are formed to have a length corresponding to approximately half the plane area of the plate. 3. The heat exchanger according to claim 1, wherein the rib is formed to have the same length as the plate. 4. The heat exchanger according to claim 3, wherein the passage elements sandwiched between the plates are alternately laminated so that their rib directions are substantially orthogonal to each other. 5. The heat exchanger according to claim 2, wherein the passage elements sandwiched between the plates are stacked in a zigzag pattern with the ribs in the same direction.