KR101233346B1 - Micro Heat Exchanger Using Clad Metal Bonding and Manufacturing Method Thereof - Google Patents

Abstract

The present invention includes a first heat exchange plate having a plurality of first microchannels formed along a longitudinal direction, the first heat exchanger being inverted from a longitudinal direction in both longitudinal cross-sections of the first microchannel, and having an inlet and an outlet; And a second heat exchange plate provided to contact one side surface of the first heat exchange plate, the second heat exchange plate having a plurality of second microchannels formed therethrough so as to form a hollow portion along a longitudinal direction thereof. By implementing a micro heat exchanger and a method of manufacturing the same, since the microchannels of the first heat exchanger plate and the second heat exchanger plate are formed in parallel with each other, heat exchange is performed in a counter flow method, thereby increasing heat exchange efficiency. In addition, by minimizing the etching process of the etching plate, there is an effect that it is possible to reduce the problem that the flow path is reduced without uniformly piping the microchannel which is a problem of the etching process. Therefore, the pressure loss in the heat exchanger can be reduced, and unnecessary parts remaining in the formation of the microchannels are reduced, thereby reducing the mass of the heat exchanger. In addition, it is possible to press instead of the etching process to further reduce the pressure loss due to non-uniform microchannels. In addition, by using the extruded aluminum plate, the second heat exchanger plate has the effect of reducing the manufacturing cost and forming a uniform microchannel, thereby reducing the manufacturing cost and increasing the heat exchange efficiency.

Description

Micro heat exchanger using clad metal bonding and manufacturing method thereof

The present invention relates to a micro heat exchanger using a joining metal and a method for manufacturing the same, and more particularly, to minimize the etching process, to reduce the manufacturing cost by using a press or extrusion plate, while at the same time to uniform the flow path pressure loss The present invention relates to a micro heat exchanger using a joining metal capable of increasing heat exchange efficiency by minimizing the number and using a counter flow method formed in a parallel direction of a microchannel.

The application of heat exchangers to industrial sites is closely related to areas requiring precision and miniaturization, such as military applications, high heat generation electronic components or materials. The heat generation of the electronic component has a great influence on the performance of the entire device including the electronic component. Therefore, the scale of the electronic component has been required to install the heat exchanger, thus leading to the development of a micro scale heat exchanger.

In addition, fuel cells, chemical reactions required by the petroleum industry, cooling of medical devices, nuclear power generation, aircraft electronic equipment cooling, high heat laser cooling, seawater evaporation pipes of desalination machinery, defense industry, etc. It is known that application is possible.

Microchannels of a heat exchanger plate used in a conventional heat exchanger are generally manufactured by an etching process, and the construction or manufacturing process thereof is introduced in Korean Patent No. 10-0628958 "Micro Heat Exchanger Using a Bonded Metal Plate". An etching process is a process of chemically etching a process surface with the chemical liquid which is corrosive to a heat exchanger plate. However, in this process, microchannels are not uniformly formed due to the characteristics of the joining metal plate in which metals having different components are distributed in the core layer and the cladding layer, and unnecessary areas remain inside the microchannels, thereby reducing the flow path. The pressure loss is increased, the flow path is not formed completely, there is a problem that the overall weight of the heat exchanger is increased due to the remaining portion, and is expensive compared to the traditional press or extrusion process.

In addition, since many conventional heat exchangers use a cross flow method for the convenience of manufacturing, there is a problem that the heat exchange efficiency is reduced.

In addition, the conventional technique using the etching process has a problem that it is difficult to mass-produce because of the use of chemical etching, resulting in a long manufacturing period of the product, a problem that the manufacturing cost increases.

Accordingly, the present invention was created to solve the above problems, and minimizes the etching process, minimizes the pressure loss by using a press or extrusion plate to minimize the pressure loss, the counter formed in the parallel direction of the microchannel It is an object of the present invention to provide a micro heat exchanger using a joining metal capable of increasing heat exchange efficiency by using a flow method and a method of manufacturing the same.

An object of the present invention as described above is a plurality of first microchannels are formed along the longitudinal direction, the first heat exchange plate formed in the inlet and the outlet is turned from the longitudinal direction in both longitudinal cross-section of the first microchannel; And a second heat exchange plate provided to contact one side surface of the first heat exchange plate, the second heat exchange plate having a plurality of second microchannels formed therethrough so as to form a hollow portion along a longitudinal direction thereof. It can be achieved by using a micro heat exchanger.

At this time, the first heat exchange plate, the core material layer; And a cladding layer provided on at least one of an upper surface and a lower surface of the core layer, and having a lower melting temperature than the core layer.

The core layer is a 6000 series aluminum alloy, and the cladding layer is a 4000 series aluminum alloy.

The core layer is a 3000 series aluminum alloy, and the cladding layer is a 4000 series aluminum alloy.

In addition, a 1st heat exchanger plate is manufactured by an etching process or a press process.

In addition, the first microchannel of the first heat exchanger plate passes through the first heat exchanger plate or is formed as a groove having a predetermined depth.

In addition, the first heat exchange plate is formed so as to penetrate the first microchannel, so that the first heat exchange plate may be separated along the path of the first microchannel through which the first heat exchanger plate is formed at one side of the first heat exchange plate. An extension part protruding integrally with the heat exchange plate is further provided.

In addition, the inlet and the outlet formed in the first microchannel are formed in directions facing each other.

In addition, a 2nd heat exchanger plate is a flat tube manufactured by extrusion process.

In addition, ports provided at the inlet and outlet sides of the first microchannel and the second microchannel, respectively, for supplying or recovering a fluid; And a header provided between the port and the micro heat exchanger to distribute the fluid supplied from the port to each of the first microchannel and the second microchannel, or to collect the fluid that has passed through the first microchannel and the second microchannel. It is further provided.

In another category, an object of the present invention is to provide a plurality of first microchannels along a longitudinal direction, and a first inlet and an outlet formed perpendicularly to the first microchannels in opposite directions to both end surfaces of the first microchannels. Heat exchange plate; And a second heat exchange plate provided to contact one side surface of the first heat exchange plate and having a plurality of second microchannels penetrated along the longitudinal direction. A second step of alternately stacking the first heat exchanger plate and the second heat exchanger plate in the same longitudinal direction; And a third step of brazing and joining alternately stacked first heat exchange plates and second heat exchange plates.

At this time, the third step is brazing at 500 ℃ to 650 ℃.

In addition, when the extension is formed on the first heat exchanger plate, a fourth step of cutting the protruding portion is further provided.

Further, there is further provided a fifth step of welding the header and port to the inlet and outlet sides of the brazed and joined first heat exchange plate and second heat exchange plate.

In addition, the first microchannel is manufactured by a press working or an etching process.

In addition, a 2nd heat exchanger plate is produced by an extrusion process.

According to the present invention, since the microchannels of the first heat exchanger plate and the second heat exchanger plate are formed in parallel with each other, heat exchange is performed in a counter flow method, and thus the heat exchange efficiency is very high.

In addition, by minimizing the etching process of the etching plate, there is an effect that it is possible to reduce the problem that the flow path is reduced without the microchannel uniformly dug the problem of the etching process. Therefore, the pressure loss in the heat exchanger can be reduced, and unnecessary parts remaining in the formation of the microchannels are reduced, thereby reducing the mass of the heat exchanger. In addition, it is possible to press instead of the etching process to further reduce the pressure loss due to non-uniform microchannels. In addition, by using the extruded aluminum plate, the second heat exchanger plate has the effect of reducing the manufacturing cost and forming a uniform microchannel, thereby reducing the manufacturing cost and increasing the heat exchange efficiency.

In addition, since it can be manufactured by an easy method for mass production such as etching, pressing, extrusion, brazing, etc., mass production is possible, and the manufacturing cost can be reduced.

The following drawings, which are attached in this specification, illustrate preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.
1 is a perspective view of a first heat exchanger plate and a second heat exchanger plate according to the present invention;
Fig. 2 is an enlarged view of a portion A in Fig. 1,
3 is a perspective view showing a modification of the first heat exchanger plate according to the present invention;
4 is a cross-sectional view taken along line BB of Fig. 3,
5 is a perspective view of a heat exchanger according to the present invention;
6 is an exploded perspective view illustrating a state in which a header and a port are provided in a heat exchanger according to the present invention;
7 is a perspective view illustrating a state in which a header and a port are coupled to a heat exchanger according to the present invention;
8 is a flow chart sequentially showing a method for manufacturing a heat exchanger according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Configuration of micro heat exchanger using bonded metal>

The micro heat exchanger 10 according to the present invention includes a first heat exchanger plate 100 and a second heat exchanger plate 200, a header 400, and a port 300 that are alternately stacked.

1 is a perspective view of a first heat exchange plate and a second heat exchange plate according to the present invention. As illustrated in FIG. 1, the first heat exchange plate 100 and the second heat exchange plate 200 each have a flat plate shape in which a plurality of first microchannels 110 and second microchannels 210 are formed. The first heat exchange plate 100 and the second heat exchange plate 200 may be formed to have a thickness of 0.1 mm to 2.0 mm, respectively. If the thickness is less than 0.1mm, the bonding force due to melting is lowered, and if the thickness exceeds 2.0mm, the average hydraulic diameter is increased and the heat transfer path is long, which may lower the heat transfer performance. Thus, the first heat exchange plate 100 and the second heat exchange plate 200 will be described in more detail as follows. In addition, the average hydraulic diameter of the first microchannel 110 and the second microchannel 210 is about 0.2 mm to about 2 mm.

FIG. 2 is an enlarged view of portion A of FIG. 1. As shown in FIGS. 1 and 2, the first heat exchange plate 100 according to the present invention is formed of a wide plate-like member, and a plurality of first microchannels 110 are formed on at least one side thereof. In this case, the first microchannel 110 is formed in plural along the longitudinal direction to a portion spaced apart from the longitudinal section of the first heat exchange plate 100 of the first heat exchange plate 100 by a predetermined distance, and the fluid flows into each of the two end surfaces. And, the inlet 111 and outlet 112 are discharged. At this time, the inlet 111 and the outlet 112 are formed to pass through the side direction of the first heat exchange plate 100 perpendicular to the first microchannel 110, the inlet 111 and the outlet 112 are opposed to each other. It is formed in the direction. That is, when the inlet 111 is formed in the left side direction of the first heat exchange plate 100, the outlet 112 is formed in the right side direction of the first heat exchange plate 100. In this case, the first microchannels 110 of the first heat exchange plate 100 are formed as grooves having a predetermined depth, as shown in FIGS. 1 and 2. The diameter of the first microchannel 110 and the depth of the groove may be variously changed according to the use mode, the capacity, etc. in which the heat exchanger 10 is used.

In addition, the first heat exchange plate 100 according to the present invention includes a core material layer 120 and a cladding layer 130. Here, the core layer 120 is to form a central region in which the first microchannels 110 of the first heat exchange plate 100 are formed, and the clad layer 130 is an upper surface and a lower surface of the core layer 120. It is provided on at least one of the surfaces is used as an adhesive layer for bonding the first heat exchange plate 100 and the second heat exchange plate 200.

Here, the material of the core layer 120 of the first heat exchange plate 100 is preferably made of aluminum having good thermal conductivity and easy processing, preferably using a 3000 series aluminum alloy or a 6000 series aluminum alloy. It is good to use, More preferably, 6901 aluminum alloy is used. In addition, the material of the cladding layer 130 of the first heat exchanger plate 100 may be made of aluminum having a relatively low melting temperature as compared with the core material layer 120. The cladding layer 130 is preferably a 4000 series aluminum alloy, preferably made of 4104 aluminum alloy. Such a first heat exchange plate 100 is manufactured by etching or press working. In the case of using the press process rather than the etching process, there is an effect of reducing the pressure loss by making the flow path more uniform. As such, since the cladding layer 130 has a lower melting temperature compared to the core material layer 120, the cladding layer 130 having a low melting temperature melts earlier than the core material layer 120 when brazing, so that the second heat exchange plate ( 200 is bonded, and the core layer 120 having a higher melting temperature than the cladding layer 130 maintains its shape. Depending on the use mode, the cladding layer 130 may not be formed above or below the core layer 120, and a separate adhesive layer may be provided.

3 is a perspective view showing a modified example of the first heat exchanger plate according to the present invention, and FIG. 4 is a sectional view taken along line B-B in FIG. As shown in FIGS. 3 and 4, the first heat exchange plate 100 according to the present invention may be formed such that the first microchannel 110 penetrates through the first heat exchange plate 100. As such, when the first microchannel 110 is formed to penetrate the first heat exchange plate 100 up and down, the first heat exchange plate 100 is prevented from being separated along the path of the first microchannel 110. In order to form an extension 140 integrally formed with the first heat exchange plate 100 on one side of the first heat exchange plate 100 having the inlet 111 and the outlet 112 of the first microchannel 110 formed thereon. do. As such, when the expansion unit 140 is formed, the expansion unit 140 is coupled by the expansion unit 140 in which the first microchannel 110 is not formed even though the first microchannel 110 is formed to penetrate the first heat exchange plate 100. Since the first heat exchange plate 100 is not separated. It can keep its shape. The expansion unit 140 is removed after the first heat exchange plate 100 is bonded to the second heat exchange plate 200. As described above, the first heat exchange plate 100 according to the modification also has a two-layer or three-layer structure of the core layer 120 and the cladding layer 130.

The second heat exchange plate 200 according to the present invention is provided to contact one side surface of the first heat exchange plate 100, and a plurality of second microchannels 210 penetrated to form a hollow part along a longitudinal direction are formed. . The second heat exchange plate 200 is manufactured by extrusion, and preferably, a flat tube made of aluminum is used. In addition, the diameter of the second microchannel 210 may be variously changed according to the use mode, capacity, etc., in which the heat exchanger 10 is used.

5 is a perspective view of a heat exchanger according to the present invention. As illustrated in FIG. 5, the heat exchanger 10 according to the present invention is formed such that the above-described first heat exchange plate 100 and the second heat exchange plate 200 are sequentially stacked in a plurality of alternations. As described above, since the first heat exchange plate 100 and the second heat exchange plate 200 are sequentially stacked alternately, the first heat exchange plate 100 and the second heat exchange plate 200 are formed as shown in FIG. 5. As described above, the heat exchanger 10 may be manufactured by alternately stacking the first heat exchanger plate 100 and the second heat exchanger plate 200 and then brazing the laminate.

The first microchannel 110 and the second microchannel 210 of the first heat exchanger plate 100 and the second heat exchanger plate 200 having the above-described configuration have a cross flow method in which paths cross each other. Rather, since the counter flow method passes in parallel with each other, the heat exchange time increases, thereby increasing the heat exchange efficiency. For example, as shown in FIG. 1, a flow H of hot fluid is formed along a path of the first microchannel 110 of the first heat exchange plate 100, and the second heat exchange plate 200 is formed. A cold fluid flow C is formed along the path of the two microchannels 210. The number of alternating layers of the first heat exchanger plate 100 and the second heat exchanger plate 200 may be variously changed depending on the usage mode, capacity, etc., in which the heat exchanger 10 is used. As shown, the flow path has a form of two refractions in which the "a" and the "b" letters are connected, and the counter flow region can be longer if necessary, and the "d" or "d" It can be composed of a plurality of shapes, that is, a shape having four or more refractions.

6 is an exploded perspective view illustrating a state in which a header and a port are provided in the heat exchanger according to the present invention, and FIG. 7 is a perspective view illustrating a state in which the header and the port are coupled to the heat exchanger according to the present invention. 6 and 7, the heat exchanger 10 according to the present invention further includes a port 300 and a header 400. Here, the port 300 is provided on four sides of the heat exchanger 10 having the inlet and the outlet of the first microchannel 110 and the second microchannel 210 to uniformly supply or recover the fluid for heat exchange. Device.

The header 400 according to the present invention is provided between the port 300 and the heat exchanger 10 to transfer the fluid supplied from the port 300 to each of the first microchannels 110 and the second microchannels 210. The device distributes the fluid evenly or collects the fluid passing through the first microchannel 110 and the second microchannel 210.

The port 300 and the header 400 described above are commonly used in the art, and detailed description thereof will be omitted.

<Method of manufacturing micro heat exchanger using bonded metal>

8 is a flow chart sequentially showing a method for manufacturing a heat exchanger according to the present invention. As shown in FIG. 8, the first heat exchanger plate 100 and the second heat exchanger plate 200 of the aforementioned configuration are manufactured, respectively (S100). At this time, the first heat exchange plate 100 is manufactured by a press working or etching process, and the second heat exchange plate 200 is produced by an extrusion process.

Next, the first heat exchanger plate 100 and the second heat exchanger plate 200 are manufactured so as to be alternately stacked in a plurality in the same longitudinal direction (S200). In this case, the number of layers of the first heat exchanger plate 100 and the second heat exchanger plate 200 that are alternately stacked may be changed in various ways depending on the use mode, the capacity, the type of fluid, and the like, in which the heat exchanger 10 is used.

Next, the first heat exchange plate 100 and the second heat exchange plate 200 are alternately stacked by brazing (S300). At this time, the brazing temperature does not affect the core layer 120 of the first heat exchanger plate 100, and only the cladding layer 130 generates a state change so that the first heat exchanger plate 100 and the second heat exchanger plate 200 are changed. Braze at 500 ℃ to 650 ℃ to be able to bond. The first microchannels 110 and the second microchannels 210 of the first heat exchanger plate 100 and the second heat exchanger plate 200 having the above-described configuration may be parallel to each other, rather than the cross flow method in which the paths cross each other. The heat exchange efficiency is increased because the heat exchange time becomes longer because the counter flow method passes. For example, as illustrated in FIGS. 1 and 7, a flow H of a hot fluid is formed along a path of the first microchannel 110 of the first heat exchange plate 100, and the second heat exchange plate 200 is formed. A cold fluid flow C is formed along the path of the second microchannel 210. The number of alternating layers of the first heat exchanger plate 100 and the second heat exchanger plate 200 may be variously changed depending on the usage mode, capacity, etc., in which the heat exchanger 10 is used.

Next, it is checked whether the expansion unit 140 is formed at one side of the first heat exchange plate 100.

If the expansion unit 140 is formed on the first heat exchanger plate 100, the expansion unit 140 protruding to the outside of the heat exchanger 10 is cut to make the appearance of the heat exchanger 10 into a hexahedral shape ( S400). If the expansion unit 140 is not formed on the first heat exchange plate 100, this step may be omitted.

Finally, the heat exchanger 10 is completed by welding the header 400 and the port 300 to the inlet and outlet sides of the brazed and joined first heat exchange plate 100 and the second heat exchange plate 200 (S500). ).

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: heat exchanger
100: first heat exchanger plate
110: first microchannel
111: entrance
112: exit
120: core layer
130: cladding layer
140: extension
200: second heat exchanger plate
210: second microchannel
300: port
400: header
C: flow direction of cold fluid
H: flow direction of hot fluid

Claims (16)

A plurality of first microchannels 110 are formed along the longitudinal direction, and the first heat exchanger is inverted from the longitudinal direction at both end surfaces of the first microchannel 110 to form an inlet 111 and an outlet 112. Plate 100; And
A second heat exchange plate 200 provided to contact one side surface of the first heat exchange plate 100 and having a plurality of second microchannels 210 penetrated to form a hollow portion along the longitudinal direction; Plural alternately stacked,
The first microchannel 110 of the first heat exchanger plate 100 penetrates the first heat exchanger plate 100, or is formed as a groove having a predetermined depth.
The first heat exchange plate 100 is formed to penetrate the first microchannel 110 to prevent the first heat exchange plate 100 from being separated along the path of the first microchannel 110 through which the first heat exchange plate 100 penetrates. Joining, characterized in that the expansion portion 140 is formed integrally projecting with the first heat exchange plate 100 on one side of the first heat exchange plate 100 is formed with the inlet 111 and outlet 112 Micro heat exchanger with metal. The method of claim 1,
The first heat exchange plate 100,
Core layer 120; And
A cladding layer 130 provided on at least one of the upper and lower surfaces of the core layer 120 and having a lower melting temperature than the core layer 120; Used micro heat exchanger. The method of claim 2,
The core layer 120 is a 6000 series aluminum alloy,
The cladding layer 130 is a micro heat exchanger using a bonding metal, characterized in that the aluminum alloy of 4000 series. The method of claim 2,
The core layer 120 is a 3000 series aluminum alloy,
The cladding layer 130 is a micro heat exchanger using a bonding metal, characterized in that the aluminum alloy of 4000 series. The method of claim 1,
The first heat exchange plate (100) is a micro heat exchanger using a joining metal, characterized in that manufactured by etching or pressing. delete delete The method of claim 1,
The inlet 111 and the outlet 112 formed in the first microchannel 110 are formed in a direction opposite to each other. The method of claim 1,
The second heat exchange plate 200 is a micro heat exchanger using a joining metal, characterized in that the flat tube manufactured by extrusion processing. The method of claim 1,
A port 300 provided at the inlet and outlet sides of the first microchannel 110 and the second microchannel 210 to supply or withdraw fluid; And
Is provided between the port 300 and the micro heat exchanger 10 to distribute the fluid supplied from the port 300 to each of the first microchannel 110 and the second microchannel 210 or the first And a header (400) for collecting the fluid that has passed through the microchannel (110) and the second microchannel (210). A plurality of first microchannels 110 are formed along the longitudinal direction, and the first heat exchange plate 100 in which the inlet 111 and the outlet are formed by changing directions from the longitudinal direction at both end surfaces of the first microchannel 110. ; And a second heat exchange plate 200 provided to contact one side surface of the first heat exchange plate 100 and having a plurality of second microchannels 210 penetrated along the length direction. Step 1 (S100);
A second step (S200) in which the first heat exchange plate 100 and the second heat exchange plate 200 are alternately stacked while facing the same length direction;
A third step (S300) of brazing the alternating first heat exchanger plate (100) and the second heat exchanger plate (200); And
When the expansion unit 140 is formed on the first heat exchange plate 100, the fourth step (S400) for cutting the protruding portion 140 is formed; micro-heat exchanger manufacturing method using a joining metal, characterized in that it comprises a . 12. The method of claim 11,
The third step (S300) is a manufacturing method of a micro heat exchanger using a joining metal, characterized in that brazing at 500 ℃ to 650 ℃. delete The method of claim 11 or 12,
A fifth step S500 of welding the header 400 and the port 300 to the inlet and outlet sides of the first heat exchanger plate 100 and the second heat exchanger plate 200 that is brazed and joined is further provided. Method for producing a micro heat exchanger using a joining metal. 12. The method of claim 11,
The first heat exchange plate (100) is a manufacturing method of a micro heat exchanger using a joining metal, characterized in that the manufacturing by pressing or etching process. 12. The method of claim 11,
The second heat exchange plate 200 is a method of manufacturing a micro heat exchanger using a joining metal, characterized in that produced by the extrusion process.

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