KR20090108220A - A Finless Heat Exchanger - Google Patents

Abstract

PURPOSE: A finless heat exchanger is provided to improve heat transfer performance by uniformly maintaining the gap of a heat pipe. CONSTITUTION: A finless heat exchanger(100) comprises a tube, a tank part, and an inlet port and an outlet port. A tube(11) is heat-exchanged with air flowing to outside and a pair of plates(10) are coupled with each other, so heat exchange media flow through an inner flow path. A tank part(12) is connected to the flowing path and installed at the upper and lower parts of a pair of the plates. An inlet port(31) and an outlet port(32) are formed on an end plate(20) coupled with the outermost of the coupling body in which a plurality of tubes are laminated and flows and discharges the heat exchange media to the tube. The finless heat exchanger is made of wires or boards. A plurality of spacers are interposed between the tubes and support the tube and maintain the gap between the tubes.

Description

Finless Heat Exchanger

The present invention relates to a finless heat exchanger, and more particularly, to a finless heat exchanger for improving heat exchange performance by maintaining a constant gap between heat transfer tubes.

The heat exchanger generally includes a pair of header tanks through which the heat exchange medium is introduced and discharged, and a tube which connects the header tanks and distributes the heat exchange medium therein to perform heat exchange. 1 shows a conventional fin-tube type heat exchanger. The heat exchanger (100 ') includes a plurality of tubes (20') in which a heat exchange medium flows therein and arranged in parallel in a line at a predetermined interval in parallel to the air blowing direction; An inlet header tank (11 ') for distributing the heat exchange medium through the inlet (11'a) and distributing the heat exchange medium to the plurality of tubes (20'); A heat dissipation fin (30 ') interposed between the tubes (20') and increasing a heat transfer area with air flowing between the tubes (20 '); The heat exchange medium moving in the tube 20 'is collected, and is composed of a discharge header tank 12' for discharging the collected heat exchange medium through the outlet 12'a.

In general, a fin-tube type heat exchanger consisting of a header tank, a tube, and a heat dissipation fin as described above has been widely used. However, in the fin-tube type heat exchanger, since the heat dissipation fins become an essential component, manufacturing costs by the heat dissipation fins increase, the weight becomes heavy, and the number of assembly operations increases.

In order to solve this problem, a finless type heat exchanger has been proposed. Similar to the fin-tube type heat exchanger, the finless type heat exchanger has components corresponding to the header tank and the tube but excludes the heat dissipation fins. The finless heat exchanger exchanges heat only by the heat pipe corresponding to the tube of the fin-tube type heat exchanger. As the heat exchanger, there are various kinds such as plate stacked type, curved extruded tube type, and round multi-tube type.

2 shows a conventional plate stacked finless type heat exchanger. As shown in FIG. 2 (A), the conventional plate-laminated finless type heat exchanger (100 '') is capable of heat exchange with air flowing outward and the heat exchange medium flows through the inner flow passage (13 ''). A plurality of tubes 11 " are formed by coupling a pair of plates 10 " to each other, and are connected to the flow path 13 ", and the upper and lower portions of the pair of plates 10 " The tube part 12 '' which is communicably installed and the end plate 20 '' which are coupled to the outermost part of the plurality of stacked bodies 11 '' are formed on the tube 11 ''. ), An inlet 31 '' and an outlet 32 '' for introducing and discharging the heat exchange medium. FIG. 2B shows a cross-sectional view of the conventional plate stack finless heat exchanger 100 ″. As shown, the pair of plates 10 ″ are coupled to each other to form one tube 11 ″, and the heat exchange medium flows through the flow path 13 ″ formed on the plate 10 ″. Will be.

On the other hand, the coupling portion (P ″) that is the portion where the plates 10 ″ are coupled to each other is generally coupled by a brazing process. However, in general, it is well known that when the surfaces are bonded to each other using a brazing process, the bonding force of the entire area is often not uniform. Similarly, since the coupling portion P ″ is coupled by a brazing process, a gap may be formed because the coupling portion P ″ may not be uniformly coupled as a whole, and thus the heat exchange medium may not flow along the predesigned flow path 13 ″ and as a gap. It is more likely to leak. Such leakage causes heat loss, leading to poor heat exchange performance.

In addition, due to the pressure generated as the heat exchange medium flows into the flow passage 13 ″, the plates 10 ″ coupled to each other are forced in a direction that is separated from each other. However, since the coupling portion P ″ is very narrow as shown, there is a possibility that the coupling portion P ″ may be opened without a separation force as described above and a gap may occur.

In addition, the conventional plate-type finless type heat exchanger (100 '') also has the following problems. In the case of the fin-tube type heat exchanger, since the heat dissipation fins are interposed between the tubes, the tubes are supported by the heat dissipation fins even when a force is applied from the outside, thereby maintaining the position. However, since the conventional plate stacking finless type heat exchanger 100 '' has no structure supporting the tube 11 '', the tube 11 '' is in the correct position even when a small force is applied from the outside. It is likely to deform out of. The space between the tubes 11 '' is the flow path of the air, so the deformation of the tube 11 '' causes a change in the air flow path (especially the change in narrowing the air flow path) and thus Is likely to yield a completely different heat exchange performance. In addition, the deformation of the tube 11 '' also increases the possibility of gaps.

As described above, various techniques have been disclosed to solve the problem that the coupling force between the plates is weak and leakage due to a gap or deformation of the tube shape is easily generated by external force.

3 (A) shows a plate of a plate stacked finless type heat exchanger according to Japanese Patent Laid-Open No. 1999-287580 (hereinafter, referred to as Prior Art 1). As shown in the prior art 1 is to solve the problem described above by forming the protrusion flow path (A2) is distributed on the flow path (A1). More specifically, the passage A1 formed in the other tube is supported by the protruding flow path A2 formed in one tube, so that the spacing between the tubes is also maintained by this support structure. However, the prior art 1 has a problem in that the coupling force between the plates is weaker in the portion in which the protruding passage A2 is formed.

Figure 3 (B) (hereinafter referred to as prior art 2) is to ensure the mutual coupling stability between the plates by reducing the plate separation force due to the flow of heat exchange medium by using one plate of the plate to be bonded to each other as a flat plate is not formed. . However, the structure according to the prior art 2, there is no structure that supports each other between the tubes, there is a problem that can not solve the problem of deformation of the tube by the external force.

3 (C) (hereinafter, referred to as the prior art 3) is to improve the bonding force between the plates by forming the plate to be bonded to each other to be fitted to each other. However, prior art 3 has the problem that the effect of improving the bonding force between the plates can be obtained while the shape of the plate is excessively complex, thereby increasing the production cost of the product. In addition, when an error occurs in a complicated plate shape, the coupling is not properly made, so there is a problem that the coupling force may be weakened or a gap is generated in this part.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to support the tube so that the shape deformation of the tube against the external force by inserting a spacer between the tube and at the same time The present invention provides a finless heat exchanger that secures an air flow path and also increases a coupling force between a pair of plates forming a tube to prevent leakage.

Finless heat exchanger of the present invention for achieving the object as described above, the pair of plates 10 are mutually coupled so that the heat exchange with the air flowing to the outside and the heat exchange medium can flow through the inner passage (13) A plurality of tubes 11 formed therein, a tank portion 12 connected to the flow path 13 and installed in upper and lower portions of the pair of plates 10 so as to communicate with each other, and a plurality of tubes 11 stacked. Finless heat exchanger 100 is formed on the end plate 20 is coupled to the outermost of the combined body comprises an inlet 31 and outlet 32 for introducing and discharging the heat exchange medium to the tube 11 In the finless heat exchanger 100 is formed of a wire or plate, a plurality of spacers interposed between the tubes 11 to support the tube 11 to maintain a gap between the tubes 11 ( 40) And that is characterized.

In addition, the spacer 40 is characterized in that it has a plurality of elastic portion 41 formed by bending. At this time, the elastic portion 41 is characterized in that the neighboring elastic portion 41 is formed in a shape protruding in the opposite direction. In addition, the spacer 40 may further include a connection part 42 formed in a straight section between the elastic parts 41 formed in a curved section.

In addition, the spacer 40 may be provided over the entire width of the tube 11 or may be provided over a portion of the width of the tube 11. Alternatively, the spacer 40 may be provided over two or more of the flow paths 13 adjacent to each other.

In addition, the spacer 40 may be provided at equal intervals or at boiling intervals.

In addition, the spacer 40 may be provided side by side with respect to the width direction of the tube 11 or inclined with respect to the width direction of the tube 11.

In addition, the spacer 40 is characterized in that it is brazed to the tube (11).

In addition, the spacer 40 is characterized in that the surface is formed rough when the wire.

In addition, the spacer 40 is characterized in that formed in a mesh structure when made of a plate material.

According to the present invention, in the plate-laminated finless heat exchanger, even if a force is applied to the heat exchanger from the outside, the shape of the tube is supported by the spacers between the tubes so as not to occur, and an air flow path is secured, thereby ensuring the robustness and heat exchange performance of the product. It is effective to increase the stability of the. In addition, since the pair of plates forming the tube receives a force in a direction in which the tubes are coupled due to the force of the tube being supported by the insertion of the spacer, there is an effect that the coupling force between the plates is increased accordingly. This has the effect of improving the rigidity of the tube itself, and thus has the great effect of preventing the leakage of heat exchange medium in the tube.

In addition, unlike the conventional air flow only in one direction, in the present invention, because the flow direction of the air can be designed in accordance with the position of the spacer provided, there is an effect that can improve the performance of the heat exchanger. In addition, since the spacer serves as a heat radiating fin by the material property of the spacer itself, there is an effect of further improving the heat exchange performance.

In addition, since the spacers are provided between the tubes, the spacers are not exposed to the outside of the heat exchanger, so that the volume of the heat exchanger does not increase while the tube support structure is included. In addition, the appearance may be beautiful.

Hereinafter, a finless heat exchanger according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

4 shows a finless heat exchanger according to the present invention. Finless heat exchanger according to the present invention, and a plurality of tubes (11) formed of a pair of plates 10 are mutually coupled to each other to be heat exchanged with the air flowing to the outside and the heat exchange medium is flowable through the inner passage (13) and The tank unit 12 is connected to the flow path 13 and is installed to communicate with each other at the upper and lower portions of the pair of plates 10, and the tube 11 is coupled to the outermost of the plurality of stacked assembly. A finless heat exchanger (100) formed on an end plate (20) and including an inlet (31) and an outlet (32) for introducing and discharging a heat exchange medium into the tube (11), wherein the tube (11) At least one spacer 40 interposed therebetween to support the tube 11 to maintain a gap between the tubes 11 is provided. The spacer 40 ensures an air flow path between the tubes 11 by maintaining a constant gap between the tubes 11.

5 illustrates a spacer of the present invention. The spacer 40 improves the coupling force of the plate 10 by applying a force to the pair of plates 10 constituting the tube 11 while maintaining the gap between the tubes 11. . In addition, the spacer 40 is provided between the tubes 11, but is not provided between all the tubes 11, but selectively provided in only a partial region, so the finless heat exchanger having the spacer 40 (100) There is almost no weight increase, and there is no big problem in weight reduction of the heat exchanger. In addition, since the spacer 40 is not exposed to the outside, the appearance is beautiful and, above all, the finless heat exchanger 100 has no volume increase, and thus does not affect the miniaturization of the heat exchanger. Hereinafter, the geometrical features of the spacer 40 and the working principle thereof will be described in more detail.

In order for the spacer 40 to faithfully perform the above-described role, the spacer 40 itself should not be easily damaged or broken. Accordingly, the spacer 40 is formed of a wire rod A or a plate B, as shown in FIG. 5A, and has a plurality of elastic portions 41 formed by bending. In more detail with respect to the material, the spacer 40 may be made into a shape as shown in A of FIG. 5 (A) by forming a suitable shape by bending a wire such as a metal wire having a predetermined diameter. By bending a plate material such as a plate to an appropriate shape and cutting it to a predetermined width, it can be made into the shape as shown in Figs. 5A and 5B. The spacer 40 thus made is preferably brazed after being interposed between the tubes 11. In particular, when the spacer 40 is formed of a plate B, the brazing coupling may be more easily performed.

The shape of the elastic part 41, that is, the curvature of the elastic part 41 may be determined according to various design variables such as the distance between the flow paths 13 and the magnitude of the force to be applied to the tube 11. have. As such, the spacers 40 may be formed of only the elastic portions 41, which are curved sections having curvatures determined according to various design variables, or the spacers 40 may be formed in each elastic portion (as illustrated in FIG. 5). It may be made by further comprising a connecting portion 42 which is a straight section connecting the 41.

Since the elastic part 41 has elasticity due to a curved shape as shown in the drawing, even if a force is applied from the outside, only some deformation of the shape may occur, thereby preventing damage or breakage. In addition, the elastic portion 41 is in close contact with a portion recessed on the outer surface of the tube 11, that is, a portion other than the flow passage 13, the portion other than the flow passage 13 constitutes the tube 11 A pair of the plate 10 is a portion coupled to each other. Therefore, as shown in FIG. 5B, when the elastic portion 41 applies a force to the tube 11 by the elastic force, the plates 10 are forced in the direction in which they are coupled to each other.

That is, the spacer 40 is interposed between the tubes 11 to allow the tubes 11 to maintain a constant distance, thereby ensuring an air flow passage, and being coupled to each other by their shape. The role of further increasing the coupling force between the pair of plates 10 constituting the tube (11).

6 and 7 illustrate various methods of installing spacers in detail. As described above, the spacer 40 is interposed between the tubes 11 such that the elastic part 41 closely contacts with a portion other than the flow path 13 of the tube 11.

The spacers 40 may be disposed over the entire width of the tube 11 as shown in FIG. 6 (A), and may be arranged over the portion of the tube 11 as shown in FIG. 6 (B). It may be. In other words, the spacer 40 may be provided over two or more flow paths 13 adjacent to each other. In addition, as shown in FIG. 6C, the tube 11 may be disposed in an inclined direction. In addition, although only the state in which the spacers 40 are arranged at equal intervals is illustrated in FIGS. 6A to 6C, the spacers 40 may be arranged at boiling intervals as shown in FIG. 6D. have. Although not shown in FIG. 6, the installation position may be freely designed within a range not departing from the spirit of the present invention, such as disposed at boiling intervals over a portion of the width, or disposed at boiling intervals in an oblique direction. In addition, the spacers 40 may be arranged side by side as shown in FIG. 7A or cross-aligned as shown in FIG. 7B according to the shape of the tube 11 flow path 13. As such, the spacer 40 may be variously disposed according to design convenience or manufacturing convenience.

Meanwhile, the air passing between the tubes 11 generally flows in a direction parallel to the width direction of the tube 11. However, in particular, when the spacer 40 is provided in the inclined direction with respect to the tube 11 as shown in FIG. 6 (C), the spacer 40 guides the flow direction of the air to allow the air to be inclined. It can be induced to flow. Therefore, the heat exchange performance of the finless heat exchanger 100 may be further improved by designing a flow direction of air.

FIG. 8 illustrates a spacer material shape of the present invention. FIG. 8 (A) shows an embodiment of the material shape in the case of a wire rod (A in FIG. 5 (A)), and FIG. 8 (B) shows a plate material (FIG. One embodiment of the material shape in the case of B) of 5 (A) is shown.

First, when the spacer 40 is made of a wire rod (A in FIG. 5A), the spacer 40 has a rough surface as shown in the cross-sectional view shown in FIG. 8A. desirable. When the spacer 40 has a rough surface as shown in FIG. 8A, the surface area of the spacer 40, that is, the contact area with air, is enlarged by the rough portion. Therefore, the spacer 40 may serve as a heat radiating fin, and accordingly, the heat exchange performance of the finless heat exchanger 100 of the present invention may be further improved.

Alternatively, the spacer 40 may be a plate (B in FIG. 5A). In this case, the spacer 40 may be a metal plate, but preferably has a mesh structure as shown in FIG. 8 (B). When the spacer 40 has a mesh structure, the surface area of the spacer 40 is also widened, and the flow of air can be made more smoothly and freely, thereby reducing the pressure drop and increasing the turbulence. Improvements can be made.

The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

1 is a conventional fin-tube type heat exchanger.

Figure 2 is a conventional plate stacked finless heat exchanger.

Figure 3 is a variety of conventional finless type heat exchanger.

4 is a finless heat exchanger of the present invention.

5 is a spacer of the present invention.

6 is a front view of the spacer installation state of the present invention.

7 is a cross-sectional view of a spacer installation state of the present invention.

8 is a spacer material shape of the present invention.

** Description of the symbols for the main parts of the drawings **

100: finless heat exchanger

10: Plate 11: Tube

12: tank part 13: euro

20: end plate

31: Inlet 32: Outlet

40: spacer

41: elastic portion 42: connecting portion

Claims (11)

It is connected to the plurality of tubes (11), the pair of plates (10) formed of a pair of plates 10 are mutually coupled to each other to exchange heat with the air flowing to the outside and to allow the heat exchange medium to flow through the inner passage (13), It is formed on the tank portion 12 which is installed in communication with each other in the upper and lower portions of the pair of plates 10, and the end plate 20 is coupled to the outermost of the plurality of laminated body of the tube 11 In the finless heat exchanger (100) comprising an inlet (31) and outlet (32) for introducing and discharging the heat exchange medium into the tube (11), The finless heat exchanger 100 Finless heat exchanger is formed of a wire or plate, characterized in that a plurality of spacers (40) interposed between the tube 11 to support the tube 11 to maintain the interval between the tube 11 is provided group. The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that it has a plurality of elastic portion (41) formed by bending. The method of claim 2, wherein the elastic portion 41 Finless heat exchanger, characterized in that formed adjacent to each other elastic portion 41 protruding in the opposite direction. The method of claim 2, wherein the spacer 40 is Finless heat exchanger characterized in that it further comprises a connecting portion (42) formed in a straight section between the elastic portion (41) formed in a curved section. The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that provided over the entire width of the tube (11) or over a portion of the width of the tube (11). The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that provided over two or more of said flow path (13) adjacent to each other. The method of claim 1, wherein the spacer 40 is Finless heat exchanger provided at equal intervals or provided at boiling intervals. The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that provided side by side with respect to the width direction of the tube (11) or inclined with respect to the width direction of the tube (11). The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that brazed to the tube (11). The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that the surface is formed rough if the wire. The method of claim 1, wherein the spacer 40 is Finless heat exchanger, characterized in that formed of a mesh structure.

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