JPH0610587B2 - 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 the basic configuration has been the plate (101) for separating two fluids to be heat-exchanged so far as shown in FIG. Are stacked with corrugated plate-shaped fins (102) forming a plurality of parallel flow paths. The plate in the one for air conditioning shown in FIG.
The (101) is made of a paper material based on Japanese paper having both heat conductivity and moisture permeability, and the fin (102) is also a plate.
It is obtained by processing a paper material similar to (101) into a corrugated plate. However, as described above, the heat exchanger having the laminated structure in which the fins (102) having the corrugated plate shape are sandwiched between the flat plate (101) requires stacking two members alternately. In addition, there was a problem that the directionality of the fins (102) was likely to vary during the stacking process.

[Outline of Invention]

The present invention has been made for the purpose of solving the above-described conventional problems, and is manufactured by integrating a plate and a member corresponding to a fin and a member corresponding to a fin being a synthetic resin. It is an object of the present invention to provide a heat exchanger having good structural stability, which is easy to perform, has a small variation, and allows the plate itself to be thin.

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 has a cross-flow in which two fluids to be heat-exchanged cross at a substantially right angle. The mold shown in FIG. 5 is a counterflow type in which two fluids to be heat-exchanged flow in opposition.

First, a cross-flow heat exchanger (1) will be described as an example of a heat exchanger in which two fluids flow at an angle. The heat exchanger (1) has a unit member (4) formed by constantly forming fins and linear ribs (3) as reinforcing members on at least one surface of the plate (2) at equal intervals in a certain direction. , The ribs (3) are laminated so that the directions of the ribs (3) deviate from each other by about 90 °. The plate (2) is a rectangular flat plate made of a thin and flexible material having a heat conductivity and a moisture permeability of about 0.05 to 0.2 mm, which is a member for partitioning two fluids to be heat-exchanged. The ribs (3) are integrally formed on at least one side of the plate (2) by a molding machine as shown in FIG. The height (h) of the ribs (3) (defining the distance between the plates (2)) and the bitches (distance) (d) plate the parallel rows (5) of double rows through which the fluid to be heat-exchanged passes. (2) is an element that is formed in the facing gap, and if it is too large, it is a parallel flow path of the air flow.
The rectification effect in (5) is small, and if it is too small, parallel flow channels
Since the static pressure loss in (5) becomes large, it is determined within the range of about 1 to 10 mm. The thinner the ribs (3) and the plate (2), the better the heat exchange, but in reality, there is a demand for maintaining their mechanical strength. Can not. However, in the heat exchanger (1) of this example configured by laminating the unit member (4) in which the rib (3) is integrally molded with the plate (2) with the synthetic resin, the rib (3) is the synthetic resin, Moreover, because the plate (2) is evenly distributed over at least one side, the mechanical strength of the plate (2) is
Supplemented by (3), the mechanical strength of the plate (2) can be reduced by that amount and the plate can be made thin. When each rib (3) is formed integrally with the plate (2) in an independent form, the plate
Plate (2) because it is weakly bound to (2) and lacks structural stability
Plate (2) at the end not to reduce the effective flat area of
The end portions are connected to each other by the thin resin film-like connection structure (6) that is in close contact with the.

Then, the unit members (4) are laminated so that the direction of the ribs (3) is deviated by 90 ° for each layer with the surface having the ribs (3) facing up or down, and if they are adhered, as shown in FIG. Cross-flow heat exchanger
(1) is obtained. Then, the primary air in the parallel flow path (5) of one system in the same direction, if the secondary air is passed through the parallel flow path (5) of the other system, like this type, Total heat exchange between primary air and secondary air is possible.

Next, the counterflow type heat exchanger (1A) shown in FIG. 5 will be described. This heat exchanger (1A) is also obtained by laminating unit members (4A) integrally formed on one surface of the plate (2) in a straight line with ribs (3) of synthetic resin at equal intervals in multiple rows. It has the same structure as the heat exchanger (1) of the previous example. This heat exchanger (1
The difference between A) and the previous example is that the unit member in which the ribs (3) are provided on almost half of one side of the plate (2).
(4A) is laminated in a staggered manner so that the ribs (3) and the ribs (3) are alternately arranged so that the directions of the ribs (3) are parallel. That is, the unit members that make up this heat exchanger (1A)
As shown in FIG. 6, the rib (3) extends from (4A) to almost half of one side of the plate (2), and the other half of the one side has a different plate (2) but lacks the rib (3). Is. Then, as shown in FIG. 5, the unit members (4A) are stacked in a zigzag manner, and the parallel flow path formed by the ribs (3) among the respective intervals between the plate (2) and the plate (2) appearing on the opposite end faces.
(5) is a part that does not appear on the end face is closed by a control member or a closing plate, and if primary air and secondary air are passed from the facing direction to each parallel flow path (5) facing the facing end face, it becomes the primary air. It is possible to exchange heat with the secondary air by the counterflow method.

Each of these heat exchangers (1), (1A) is a unit member (4),
It is obtained by laminating (4A) and not only has good manufacturability, but the ribs (3) are integrated with the plate (2), and the ribs (3) are connected to each other at the end side by the connecting structure (6). Parallel flow path (5) composed of ribs (3) even when laminated
The ribs (3) have high structural stability and the strength of the ribs (3) and the connecting structure (6) is excellent, and the plate (2) has heat transfer and permeability. Since the material with excellent wettability can be selected as appropriate, the selection range of material can be widened and inexpensive one can be obtained and the unit member (4)
Since the strength of the plate can be sufficiently secured, it is possible to cope with further thinning and softening of the plate.

〔The invention's effect〕

As described above, as is clear from the description of the embodiment, the heat exchanger of the present invention is integrally formed in a row with ribs made of synthetic resin linearly arranged at a predetermined interval on one surface of the plate having heat conductivity. The plate-fin heat exchanger has a layered structure with parallel flow paths through which the fluids to be heat-exchanged pass through each layer by simply stacking the unit members. Is obtained and the manufacturability is good. Further, since the ribs are integral with the plate and the end portions of the ribs are connected by a connecting structure, the ribs have high structural stability and the ribs can bear mechanical strength. It has the advantage that it can be made thin, and that the parallel flow paths due to the ribs are less likely to vary in direction during stacking, and it is possible to deal with further thinning and flexibility of the plate, and it is possible to 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. 3 is a unit thereof. FIG. 4 is a perspective view showing a member alone, FIG. 4 is an explanatory view showing an example of a molding mode of a unit member, FIG. 5 is a perspective view of a heat exchanger showing another embodiment of the present invention, and FIG. It is explanatory drawing which shows the unit member independently. In the figure, (1) and (1A) are heat exchangers, (2) is a plate, (3) is a rib, (4) and (4A) are unit members, (5) is a parallel flow path, and (6) is a connection. It is a structure. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (5)

[Claims] 1. A unit member formed by integrally molding linear ribs made of synthetic resin in a row at predetermined intervals on at least one surface of a flat plate having heat conductivity and moisture permeability,
A plurality of layers are laminated to form a double-row parallel flow path by the ribs in the gaps between the plates facing each other, and the ribs of the unit members are in close contact with one surface of the plate at their end sides. A heat exchanger characterized by being connected by a connecting structure for connecting. 2. The heat exchanger according to claim 1, wherein the rib is formed on at least one half of at least one side of each plate. 3. A rib according to claim 1, wherein ribs are formed on at least one surface of each plate.
The heat exchanger according to the item. 4. The heat exchanger according to claim 3, wherein the unit members are alternately laminated so that their rib directions are substantially orthogonal to each other. 5. The heat exchanger according to claim 2, wherein the unit members are stacked in a staggered manner with the ribs in the same direction.