JP2016109332A - Heat exchanger and its process of manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger of which processing and assembling can be easily carried out in a less-expensive manner and showing superior heat exchanging performance and durability and its process of manufacturing.SOLUTION: This invention is constituted in such a way that a plurality of aluminum extrusion materials 1 are arranged along a short side direction of the first fluid flow passage 2A and the second fluid flow passage 2B having the same shape rectangular section and adjoining flow passages 2A, 2B are alternatively displaced along their long side directions while their positions are being displaced by a specified distance, both surfaces opposing to each other near both ends along their extrusion directions are alternatively exposed along the short side directions of the flow passages 2A, 2B at their short sides in a specified width. One of the exposed flow passages along the extrusion direction is applied as flow inlets 11A, 11B of the first fluid 10A and the second fluid 10B and the other of the exposed flow passages is applied as discharge outlets 12A, 12B of the first fluid 10A and the second fluid 10B and both ends along the extrusion direction are closed by covers 6.SELECTED DRAWING: Figure 8

Description

The present invention relates to improvements in heat exchangers used for air conditioning equipment and heat exchangers used for cooling control equipment.

In general, a heat exchanger performs cooling or heating by bringing a high temperature first fluid such as liquid or gas into contact with a low temperature second fluid such as liquid or gas via a flow path. In the heat exchanger used in the air conditioner, the first flow path through which the first fluid flows and the second flow path through which the second fluid flow have corrugated corrugated paper made on one side of the paper sheet. A plurality of first flow paths and second flow paths are orthogonally stacked and stacked alternately (Patent Document 1). However, this stacked heat exchanger has a problem that the corrugate processing and the stacking work require a lot of labor and the strength is weak.

For this reason, a heat exchanger with improved assemblability has been proposed using an extruded aluminum material obtained by extruding a flow path. For example, an aluminum extrudate is sandwiched between an upper flat plate and an intermediate flat plate, a trapezoidal and rhombic first fluid flow path is formed between them, and an aluminum extrudate is further formed between the intermediate flat plate and the lower flat plate. There is a heat exchanger (Patent Document 2) in which a formed side wall portion for spacing is provided and a fin portion is provided between the horizontal intermediate plate and the lower plate to form a second fluid flow path. However, although the structure using the extruded material of aluminum is excellent in strength, there are problems that the number of parts is large, the processing is troublesome, and the assemblability is not sufficiently improved.

JP 2001-241867 A JP-A-5-39992

The present invention improves the above problems, and provides a heat exchanger that is easy and inexpensive to process and assemble, and that excels in heat exchange performance and durability, and a method for manufacturing the same.

In the heat exchanger according to claim 1 of the present invention, a plurality of rectangular cross-section flow paths having the same shape are provided along the short side direction, and adjacent flow paths are alternately arranged along the long side direction. The opposite sides in the vicinity of both ends along the extrusion direction of the extruded aluminum material whose position is shifted by a certain distance are alternately exposed at the short side of the rectangular cross section with a predetermined width along the short side direction of the flow path. One of the exposed flow paths along the extrusion direction is a fluid inflow port, the other is a fluid discharge port, and both ends along the extrusion direction are closed.

The heat exchanger according to claim 2 of the present invention is characterized in that, in claim 1, both ends along the extrusion direction of the extruded aluminum material are closed with a cover via a gasket.

In the heat exchanger manufacturing method according to claim 3 of the present invention, a plurality of rectangular cross-section flow paths having the same shape are provided along the short side direction, and adjacent flow paths are provided along the long side direction. After forming an aluminum extruded material whose position is alternately shifted by a certain distance, the opposing both surfaces near both ends along the extrusion direction are short-circuited with a predetermined width along the short-side direction of the flow path and a rectangular cross-section flow path. Milled so that the sides are exposed alternately, cut out, then closed both ends along the extrusion direction of the aluminum extruded material, and one side along the extrusion direction of the extruded material of the flow channel exposed through the notch A fluid inflow port is provided, and the other is a fluid discharge port.

According to the heat exchanger of the first aspect of the present invention, the extruded first aluminum fluid passage and the second fluid passage are alternately formed, and the first fluid passage and the second fluid passage are formed. It can exchange heat efficiently and is made of aluminum, so it has excellent strength and durability. Further, by adjusting the length of the extruded aluminum material, heat exchangers with various heat exchange amounts can be easily prepared. In addition, it is easy to process because the inlet and outlet can be formed by flat milling at least four locations on the surface of the extruded aluminum material, and it can be easily and inexpensively created by simply closing both ends of the extruded aluminum material. can do.

Moreover, according to the heat exchanger of Claim 2, since the both ends along the extrusion direction of an aluminum extrusion material are only obstruct | occluded with a cover via a gasket, an assembly is easy.

According to the heat exchanger according to claim 3, a plurality of rectangular cross-section flow paths having the same shape are provided along the short side direction, and adjacent flow paths are alternately arranged along the long side direction. After molding the extruded aluminum material whose position is shifted by a certain distance, it is possible to form the inlet and outlet by simply milling at least four places on the surface of the extruded aluminum material. be able to.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows an extruded aluminum material 1. As shown in FIG. 2, a plurality of channels 2 A and 2 B having a rectangular cross section having the same shape are provided along the short side direction and adjacent channels. 2A and 2B are formed by alternately shifting their positions by a certain distance L along the long side direction. The aluminum extruded material 1 in which the flow paths 2A and 2B are displaced is cut into a predetermined length along the extrusion direction.

Next, this aluminum extruded material 1 is set on a milling machine (not shown), and the range of C1 on the upper surface of the part slightly away from both ends as shown by the phantom lines in FIG. 1 is flat milled by the thickness D in FIG. And remove. The thickness to be milled is set so that the thickness of the upper surface of the flow path 2B remains the same as the thickness between the flow paths 2A and 2B.

A state where the range of C1 in the vicinity of both ends of the upper surface of the extruded aluminum material 1 is removed is as shown in FIG. In this case, both ends along the extrusion direction of the extruded aluminum material 1 are left and this is used as the cover attachment portion 3. In FIG. 3, the front cover attaching portion 3 is omitted, and the internal structure is shown so as to be visible.

Next, the aluminum extruded material 1 is reversed, and the range of C2 shown in FIG. 1 is similarly removed by plane milling by the thickness D, and processed into the state shown in FIGS. In FIG. 4, the front cover attaching portion 3 is omitted and the internal structure is shown so as to be visible.

Next, as shown in FIG. 5, screw holes 4 are processed in the respective corners of the cover attaching portions 3 at both ends along the extrusion direction of the aluminum extruded material 1. Next, as shown in FIG. 6, the cover 6 is fixed to the cover attaching portion 3 through the gasket 5 and closed with screws 7 as shown in FIG. 7, and the heat exchanger 8 is assembled.

In the heat exchanger 8 assembled in this way, the flow paths penetrating the portions removed by milling and the non-penetrating flow paths 2A and 2B appear alternately. For example, the front side of the upper surface is the first fluid inlet 11A and the rear side is the first fluid outlet 12A. The front side of the lower surface is the second fluid inlet 11B, and the rear side is the second fluid outlet 12B.

For example, as shown in FIG. 8, when the first fluid 10 </ b> A is cooled to low temperature air and is supplied to the first fluid inlet 11 </ b> A from a cooler (not shown) by a blower, the first fluid flow path along the extrusion direction therefrom The air is discharged from the first fluid discharge port 12A through 2A and returned to the air conditioner.

Further, the second fluid 10B is heated to high temperature air, and the second fluid 10B that has been warmed by cooling an unillustrated device is supplied to the second fluid inlet 11B by a blower. From this inflow port 11B, it passes through the second fluid flow path 2B along the extrusion direction, is discharged from the discharge port 12A of the second fluid, and is returned to the equipment to be cooled.

The aluminum first fluid flow path 2A and the second fluid flow path 2B extruded in this way are alternately formed, and heat can be efficiently exchanged between the first fluid 10A and the second fluid 10B. Made of aluminum, it has excellent strength and durability. Moreover, the heat exchanger 8 of various heat exchange amounts can be easily produced by adjusting the cut-out length of the extruded aluminum material 1. In addition, the inlets 11A and 11B and the outlets 12A and 12B can be formed simply by plane milling at four locations on the surface of the extruded aluminum material 1, and the processing is easy. Further, the gasket 5 and the cover 6 are formed at both ends of the extruded aluminum material 1. Can be manufactured at low cost.

In the above description, the heat exchanger 8 in which the inlets 11A and 11B and the outlets 12A and 12B are formed on both the upper and lower sides is shown. Further, although the case where four inlets 11A and 11B and four outlets 12A and 12B are provided is shown, six or more may be provided. Moreover, although the case where the both ends of the aluminum extrusion material 1 were obstruct | occluded with the gasket 5 and the cover 6 was shown, the structure closed by stuffing the edge part of the exposed flow paths 2A and 2B may be sufficient.

In the above description, the case where both the first fluid 10A and the second fluid 10B use air is shown, but one or both may flow a liquid such as oil or antifreeze.

It is a perspective view of the aluminum extrusion material which arranged the flow path of the rectangular cross section which makes the same shape by one Embodiment of this invention along with the short side direction. It is a front view of the aluminum extrusion material of FIG. It is a perspective view which shows the state which removed the upper surface both ends side of the aluminum extrusion material shown in FIG. It is a perspective view which shows the state which removed the both ends of the upper and lower surfaces of the aluminum extrusion material shown in FIG. It is a perspective view which shows the state which removed the both-ends side of the upper and lower surfaces of an aluminum extrusion material. It is a perspective view which decomposes | disassembles and shows a heat exchanger. It is a perspective view of a heat exchanger. It is explanatory drawing which shows the flow of the fluid in a heat exchanger.

1 Extruded aluminum
2A 1st fluid flow path
2B Second fluid flow path
3 Cover mounting part
4 Screw holes
5 Gasket
6 Cover
7 screw
8 Heat exchanger
10A 1st fluid
10B Second fluid
11A First fluid inlet
11B Second fluid inlet
12A First fluid outlet
12B Second fluid outlet

Claims (3)

In the extrusion direction of the aluminum extrusion material, a plurality of rectangular cross-section flow paths having the same shape are provided along the short side direction, and adjacent flow paths are alternately shifted by a certain distance along the long side direction. The opposite sides in the vicinity of both ends along the short side of the flow path are alternately exposed with the short side of the rectangular cross section with a predetermined width along the short side direction of the flow path, and one of the exposed flow paths along the extrusion direction is exposed. A heat exchanger characterized in that a fluid inlet is provided, the other is a fluid outlet, and both ends along the extrusion direction are closed. The heat exchanger according to claim 1, wherein both ends of the extruded aluminum material along the extrusion direction are closed with a cover via a gasket. After molding an extruded aluminum material in which a plurality of rectangular cross-section flow paths having the same shape are provided along the short side direction, and adjacent flow paths are alternately shifted by a certain distance along the long side direction. Then, both opposing sides near both ends along the extrusion direction are milled so that the short sides of the rectangular cross section are alternately exposed with a predetermined width along the short side direction of the flow path, and then cut out. Both ends along the extrusion direction of the aluminum extruded material are closed, and one of the flow paths exposed by the cutout along the extrusion direction of the extruded material is used as a fluid inlet, and the other is used as a fluid outlet. A method for manufacturing a heat exchanger.