JPS61153396A - Heat exchanger - Google Patents

Abstract

PURPOSE:To form a heat exchanger of which manufacture is easy and the constructive stability is high, by a method wherein each rib as a fin is connected in trussed girder form each other as well as the breadth of an attaching surface with a plate of a rib at the most outside part is made wide. CONSTITUTION:The heat exchanger 1 is obtained by interposing passage lattices 4 which are mainly composed of rectangular ribs 3 as fins arranging at equal spaces in the prescribed direction, so as the direction of ribs 3 slips 90 deg. on every one layer between plural number of plates. Ribs 3 are connected at the connecting structures 5 which adhere to the one side of the plates with synthetic resin. Because of this, the mechanical strength of the plates 2 can be supplemented by ribs 3, and the width of the plates 2 can be made thin. The structural stability of the whole heat exchanger is high, the connection being strong by the above-mentioned connecting structures 5, especially about two ribs most outside, the upper surface 6 of the attaching surface with the plates are widely formed, and the adhesiveness with the plates 2 is improved, so even if the plate 2 is made of flexible materials such as Japanese paper, the adhesiveness with the passage element 4 is good and a heat exchanger which is stable and easy for arrangement can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a plate-fin type heat exchanger having a laminated structure.

[Conventional technology]

Plate-fin type heat exchangers have a large heat transfer area per unit volume, and are widely used as relatively small and highly efficient heat exchangers. It can be divided into three types: countercurrent type, countercurrent type, and orthogonal (oblique) type. Counter-flow type and cross-flow type are often used for air conditioners, but until now their basic configuration has been as shown in Fig. ) are laminated with corrugated plate-shaped fins (102) sandwiching them between them to form double rows of parallel flow channels. In the air conditioner shown in Fig. 6, the fin (101) is made of paper material based on Japanese paper that has both heat conductivity and moisture permeability, and the fin (102)
It is also obtained by processing the same paper material as the plate (101) into a corrugated plate.

[Problem that the invention seeks to solve]

In the conventional heat exchanger as described above, manufacturing the corrugated plate-shaped fins (102) is quite difficult, including cutting to obtain a good end surface.

The present invention was made to solve these problems, and an object of the present invention is to obtain a heat exchanger that is easy to manufacture and has high structural stability.

[Means for solving problems]

The present invention [Such a heat exchanger has a passage element sandwiched between flat plates, and the passage element is constructed by connecting a plurality of ribs arranged in a row at both ends in a bridge-like structure. It is an integrally molded piece of synthetic resin in the form of a joined ladder, and the outermost part of the rib has a wider contact surface with the plate than the other parts.

[Effect]

In this invention, since the passage element is integrally molded of synthetic resin, there is little variation, and the outermost rib has a wide contact surface with the plate, so it fits well with the plate. It is difficult to form gaps between the ribs of the parts, so it has good structural stability and is easy to manufacture.

[Example] The heat exchanger as an example shown in the drawing is an air-to-air heat exchanger employed in the air conditioning field. The one in FIG. 4 is a counter-flow type in which two fluids to be heat exchanged flow oppositely.

First, a cross-flow type heat exchanger (1) will be described as an example of a heat exchanger in which two fluids flow at an angle. This heat exchanger (1) consists of a passage mainly consisting of linear ribs (3) having rectangular end surfaces as fins arranged at equal intervals in a certain direction between each of a plurality of plates (2). It is obtained by sandwiching elements (4) such that the directions of their ribs (3) are shifted by approximately 90° from layer to layer. Plate) (2) is a rectangular flat plate with a wall thickness of about 0.05 to 0.2 mm made of Japanese paper or the like that has both heat conductivity and moisture permeability, and is a member that partitions two fluids to be heat exchanged. The passage element (4) is an integrally molded synthetic resin product in which double rows of ribs (3) are linearly formed in a plane area corresponding to the inlet plate (2) shown in FIG. ) height plate (2) defines the distance between them, 0.5 to 5
, on the order of OWM) and the pitch (spacing) are elements that constitute a return series of parallel channels through which the fluid to be heat exchanged passes in opposite gaps of the plates (2). Therefore, if the pitch is too large, the rectifying effect of the air flow in the parallel flow path will be small, and if the pitch is too small, the static pressure loss in the parallel flow path will be large.
It is determined in a range of about 0 to 70.011 fl. rib(
The thinner the wall thickness of plate 3) and plate 2), the better the results in terms of heat exchange, but in reality, due to the requirement to maintain their mechanical strength, extremely thin walls are required. Can not. However, the passage element (4) and the plate (9) are formed of synthetic resin, and the ribs (3) are connected to each other in a bridging manner by the connecting structure (5) at both ends.
In the heat exchanger (1) of this example configured by laminating the ribs (3) and the plate C2, the ribs (3) are made of synthetic resin.
) with a connecting structure (5) in close contact with one side? Because of this connection, the mechanical strength of the plate (2) can be supplemented by the ribs (3), which reduces the mechanical strength of the plate (2) and makes it thinner. It can also be rubbed. Each rib (3
) & y, the parts other than both ends are in contact with the plate (2) in an independent form, but the connecting structure (5) < o, i ~1. Ow
m thickness) Ic J: 7' L/-) (2)
Since the bond between the heat exchanger and the heat exchanger is strong, the structural stability of the entire heat exchanger is high. In particular, in the case of the outermost 1111 part of the back of the rib (3), the upper surface (6) which is the contact surface with the plate (2) is formed wider than that of the other ribs (3), and the plate (2) The aim is to improve the adhesion of the Therefore, the plate (2
) is made of a flexible material such as Japanese paper, the adhesiveness between the plate (2) and the passage element (4) is good and the heat exchanger (1) has a stable structure.

Therefore, if the passage elements (4) are sandwiched and laminated between the plates (2) so that the direction of the ribs (3) in each layer is shifted by 90 degrees, and then bonded, the structural stability as shown in Fig. 1 can be achieved. A cross-flow type heat exchanger Rg(1) with high assemblability is obtained.

Then, if primary air is passed through the parallel flow path of one system in the same direction, and secondary air is passed through the parallel flow path of the other system, the -primary air and secondary air can be passed through the parallel flow path of the other system in the same direction. Total heat exchange with the next air is possible.

Next, the counterflow type heat exchanger (IA) shown in FIG. 3 will be explained. This heat exchanger (IA) also has each plate (2)
1; l is a synthetic resin phase - lr has ribs (
3) were integrally molded in a straight line at equal intervals;
In terms of the points obtained by using Motoko Yamaji (4A) as a sandwiched skin,
It has the same configuration as the heat exchanger (1) in the previous example. The difference between this heat exchanger RB (LA) and the previous one is that the passage element (4A)
The ribs (3) are formed to have a length corresponding to approximately half of the planar area of one side of the plate (2), and the passage elements (4A) are arranged in a staggered manner between the plates (2), with each rib This is because the direction of (3) was parallel to the sound. That is, the 1m1 loop element (4A) of this heat exchanger (IA) has a size corresponding to approximately half of the planar area of the loop plate (2) shown in Fig. 4, and the parallel Channels are present for one half of the plate (2), resulting in a configuration lacking parallel channels compared to the other half. Then, as shown in FIG. 3, the passage elements (4A) are arranged in a staggered manner. At the same time, between the plates (2) that appear on the opposing end faces, the portions where the parallel flow paths formed by the ribs (3) cannot be formed at the ends are covered with control members or blocking plates. If primary air and secondary air are passed from the bottom direction to each obstructed vomiting flow 11'3 facing the opposite end, counterflow system between the -primary air and secondary air can be achieved. This prevents heat exchange from occurring.

In both heat exchangers (1) and (IA), the plate (2) is made of a material that has both heat conductivity and moisture permeability, so it is possible to exchange both sensible heat and latent heat. In Although,
The plate (2) is made of a heat conductive material and
It is also possible to build a heat exchanger for heat in exactly the same way. Regarding the outermost rib (3), the wall thickness may be made larger than the other ribs (3) and the upper surface (6) may be made wider as in the above two examples, but as shown in FIG. It is also possible to widen only the top surface (6) without increasing the wall thickness by making the shape angular.

〔Effect of the invention〕

As is clear from the above description of Embodiment P, the heat exchanger of the present invention has ribs made of synthetic resin arranged in rows at predetermined intervals between heat-conducting plates at their ends. In addition to connecting the ribs in a bridging structure, the ribs on the outermost part of the seedlings are made to be wider than the ribs, making the seedlings wider than the ribs in the A structure. Because of this, it is easy to make and install, and the plate and ribs fit well and can be easily attached to each other, making it easy to assemble. Further, since the ribs are connected at their ends in an a-tie structure and the contact surface of the outer side part is wide, the ribs and the plate are in close contact with each other, and the overall structural stability is high.

[Brief explanation of the drawing]

1st! The figure is a perspective view showing a cross-flow type heat exchanger as an application example of the present invention, FIG. 2 is a perspective view showing its operation alone, and FIG. FIG. 4 is an explanatory diagram showing the passage element alone, FIG. 5 is an end view showing the form of a pond in the passage element, and FIG. FIG. 2 is a perspective view showing an AC heat exchanger. In the figure, (1) and (LA) are heat exchangers, (
2) is a plate, (3) is a rib, (4) and (4A) are passage elements, (5) is a connecting structure, and (6) is an upper surface. In addition, the same reference numerals in the drawings indicate the same or equivalent parts. Agent Masuo Oiwa (and 2 others) Figure 1 ``°°Heat Exchange DJ- Figure 5

Claims (1)

[Claims] A heat exchanger comprising a plurality of flat plates having heat conductivity, with passage elements interposed between each plate, and double rows of parallel flow passages formed by the passage elements arranged in multiple stages in opposing gaps between the plates. , each of the passage elements is an integrally molded ladder-shaped synthetic resin article in which ribs arranged in a row at a predetermined interval are connected in a bridge-like manner at both ends thereof by a connecting structure, and A heat exchanger characterized in that the outermost part of the heat exchanger has a contact surface with a plate that is wider than the other parts.