JPH0318872Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This 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 (diagonal) flow type. A cross-flow type is often used for air conditioners, but until now the basic configuration has been
As shown in the figure, a heat exchange plate 101 made of cardboard or the like that partitions two fluids to be heat exchanged is stacked with a corrugated spacing plate 102 made of cardboard or the like forming a double row of parallel flow paths sandwiched therebetween. The entire structure is corrugated paper-like. In the air conditioner shown in FIG. 5, the heat exchange plate 101 is made of a paper material based on Japanese paper that has both heat conductivity and moisture permeability, and the spacing plate 102 is also made of a paper material similar to the heat exchange plate 101. It is obtained by processing paper into corrugated plates and cutting them into predetermined dimensions and shapes.

[Problem that the invention attempts to solve]

In the conventional heat exchanger as described above, the spacing plate 102 obtained by cutting a corrugated plate into a predetermined size and shape is clamped to the heat exchange plate 101 obtained by cutting in the same manner. However, when cutting in a direction that is not parallel to the peaks and troughs of the corrugated plate, the corrugations on the end face tend to collapse, and in air-to-air heat exchangers, the deformation of the end face during cutting causes a large pressure loss. ing. In addition, because a predetermined size and shape is obtained by cutting, the yield of the material is poor, and when cutting into shapes such as diamonds, the amount of waste material reaches as much as 40%.

The present invention was devised to solve these problems, and aims to provide a heat exchanger that generates little waste material during manufacturing, has a good material yield, and has low pressure loss during fluid conduction.

[Means for Solving the Problems] The heat exchanger according to this invention includes a unit member in which a plurality of ribs are arranged in a row at a predetermined interval on one side of a flat plate. The ribs are alternately stacked so as to intersect, and the ribs form multistage parallel channels, and the inflow portion of each parallel channel formed by the ribs and plates is configured in a groove shape.

[Effect]

In this design, parallel channels for passing fluid are formed by arranging ribs in rows on the plate, so variations in the parallel channels are less likely to occur. Since there are fewer collisions and less resistance to inflow, pressure loss is low. Also,
Since unit members are obtained by arranging ribs on plates, there is almost no waste material and the material yield is good.

[Example of idea]

The heat exchanger shown in the drawing is an air-to-air heat exchanger employed in the air conditioning field, and the one shown in FIG. A cross-flow type heat exchanger 1 will be described as an example of an AC-type heat exchanger in which two fluids flow at an angle. This heat exchanger 1 includes, between each of a plurality of plates 2,
Parallel flow paths are formed by linear ribs 3 arranged at equal intervals in a certain direction, and the ribs 3
The direction of each layer is shifted by approximately 90°. Plate 2 is a thin rectangular flat plate 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. Ribs 3 made of, for example, a polymeric material, ceramics, fiber material, wood, paper, etc., are fixed in a row at predetermined intervals to constitute a unit member 4 that is a constituent unit of the heat exchanger 1. There is. The height of the rib 3 of each unit member 4 (defines the interval between the plates 2,
(approximately 1 to 2.0 mm) are elements that constitute double rows of parallel flow paths through which the fluid to be heat exchanged passes, in the opposing gaps of the plates 2. The thickness of the plate 2 should be thinner, but normally it cannot be made too thin because of the need to maintain mechanical strength. However, in the heat exchanger 1 of this example in which the ribs 3 can be integrally formed on one side of the plate 2, the mechanical strength of the plate 2 can be supplemented by the ribs 3, so the mechanical strength of the plate 2 can be reduced by that amount and the wall thickness can be reduced. It can also be done. Even if each rib 3 has a mutually independent configuration as shown in FIG. 2, as shown in FIG. 3,
It may also have a ladder-like configuration in which the lower surfaces of both ends are connected by bridge portions 5. In the one shown in FIG. 2 in which the ribs 3 are independent, one end of each rib 3 except the outermost part is formed into a tapered shape by two slopes 6. In addition to the ribs 3, one of the bridging parts 5 has a chamfered slope 6 formed at its outer end.

Therefore, if the unit members 4 are stacked so that the direction of the rib 3 is shifted by 90 degrees in each layer and are bonded to each other, a cross-flow type structure with high structural stability and easy assembly as shown in Fig. 1 can be obtained. A heat exchanger 1 is obtained. Then, the primary air is supplied from the direction in which the end of the rib 3 of the parallel flow path of one system in the same direction has the slope 6, and the primary air is directed from the direction in which the end of the rib 3 of the parallel flow path of the other system has the slope 6. If the secondary air is passed through, heat exchange between the primary air and the secondary air is possible, as in previous systems of this type. In this heat exchanger 1, since the plates 2 are made of a material that has both heat conductivity and moisture permeability, it is possible to exchange both sensible heat and latent heat. It is also possible in exactly the same way to form and configure a heat exchanger for sensible heat. The fluid inflow portion of each parallel flow path has a groove shape due to the ribs 3 and the slopes 6 of the bridge portions 5, and when the fluid flows into the parallel flow path,
There is no collision with the end face, and pressure loss is significantly lower.
Therefore, when applied to an air conditioner, the blower can be made smaller, and in terms of manufacturing, there is no need for a cutting process that involves deformation of the end face, so there is no defective product due to deformation of the end face, and the yield is good. Note that the present invention can be applied in a similar manner to a counterflow type heat exchanger as shown in FIG. 4, and the same operations and effects as in the above embodiment can be obtained.

[Effect of idea]

As is clear from the above description of the embodiments, the heat exchanger of the present invention includes a unit member formed by arranging a plurality of ribs in a row at a predetermined interval on one side of a heat conductive plate. A heat exchanger in which ribs are alternately stacked so that they intersect, and a double row of parallel flow channels formed by the ribs are formed in multiple stages in the gaps between each plate, and the fluid inlet of each parallel flow channel has a groove shape. Because of its structure, it is easy to stack the unit members together, making it easy to manufacture, and there is no possibility of crushing due to cutting of the end face, resulting in a good yield of material. Since there are almost no collisions between the two, there is an advantage that the pressure loss of the fluid in parallel flow paths is significantly reduced.

[Brief explanation of drawings]

Fig. 1 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 the unit member alone, and Fig. 3 is a perspective view showing another aspect of the unit member. FIG. 4 is an explanatory view showing another embodiment of the present invention, and FIG. 5 is a perspective view showing a cross-flow type heat exchanger as a conventional example. In the figure, 1 is a heat exchanger, 2 is a plate, 3 is a rib, 4 is a unit member, 5 is a bridge portion, and 6 is a slope. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A unit member formed by arranging a plurality of ribs in a row at a predetermined interval on one side of a flat plate having heat conductivity is stacked so that the ribs alternately intersect with each other. A heat exchanger comprising a multi-stage structure of double rows of parallel passages formed by the ribs in the gaps, wherein the fluid inflow portion of each parallel passage has a groove shape formed of a slope with low resistance to fluid inflow. A heat exchanger characterized by: