KR100955332B1 - Plate of lamination-type heat exchanger, its manufacturing process - Google Patents

Abstract

The present invention relates to a laminated heat exchanger and a plate manufacturing method of the laminated heat exchanger to improve the heat transfer efficiency between the refrigerant and the outside air of the laminated heat exchanger.

According to the present invention, a pair of plates 20 provided with a refrigerant passage portion 24 between the tank portions 22 and 22 'formed at the upper and lower sides thereof are joined to each other to form a flat tube having the refrigerant passage 50 formed therein. In the multilayer heat exchanger having 30,

Pleats 26 are continuously formed in a direction orthogonal to an extension line connecting the upper and lower tank portions 22 and 22 'to the left and right ends of the joint including the refrigerant passage portions 24 of the plates 20, respectively. In addition, the pleats 26 on the left and right opposite ends are compressed to provide a flat heat exchanger 28.

Plate, Tank, Refrigerant Passage, Corrugation, Flat Tube, Inner Pin

Description

Multilayer Heat Exchanger, Plate Manufacturing Method of This Multilayer Heat Exchanger {PLATE OF LAMINATION-TYPE HEAT EXCHANGER, ITS MANUFACTURING PROCESS}

1 is a perspective view of a conventional laminated heat exchanger

Figure 2 is a partial perspective view showing a plate of a conventional laminated heat exchanger

3 is a perspective view and a partially enlarged view showing a plate of the laminated heat exchanger according to the present invention;

Figure 4 is a perspective view showing a flat tube of the laminated heat exchanger according to the present invention

5 is a cross-sectional view showing a first embodiment of a flat tube according to the present invention;

Figure 6 is a cross-sectional view showing a second embodiment of a flat tube according to the present invention

7 is a cross-sectional view showing a third embodiment of a flat tube according to the present invention;

8 is a process chart showing the manufacturing method of the plate according to the present invention.

            <Description of Symbols for Main Parts of Drawings>

              20: plate 22,22 ': tank part

              24: refrigerant passage portion 26: corrugation

              28: flat bonded surface 30: flat tube                 

              40: air flow path 50: refrigerant flow path

60: pin member 70: inner pin

The present invention relates to a laminated heat exchanger, and more particularly, to a laminated heat exchanger and a plate manufacturing method of the laminated heat exchanger to improve the heat transfer efficiency between the refrigerant and the outside air of the laminated heat exchanger.

In general, a heat exchanger is a type of air conditioner installed on a flow path of a cooling / heating system to allow a working fluid flowing in a flow path to exchange heat with outside air, thereby cooling / heating a predetermined space. Therefore, it can be classified into various forms including a laminated heat exchanger.

As shown in FIG. 1, the multilayer heat exchanger is stacked in a predetermined interval and includes a plurality of refrigerant tubes 1 formed therein with a refrigerant passage through which refrigerant flows. A cooling fin (2) interposed between the coolant tubes (1) and continuously bent in a zigzag shape so as to perform an active heat exchange with the coolant; An end plate (3) attached to the outermost cooling fin to protect the cooling fin; It consists of the inlet pipe 4 and the outlet pipe 5 provided in the inlet / outlet side of a refrigerant | coolant.                         

In particular, the coolant tube 1 has a coolant passage part 8 in which a plurality of beads 7 are regularly arranged between the upper and lower tank parts 6, as shown in FIG. 2 (lower tank part not shown). ) Is provided with a pair of plates 10 are bonded to each other to form a refrigerant flow path.

However, in most cases including the laminated heat exchanger, there have been limitations in forming the beads 7 by presses to densify the gaps of the beads 7 or increase the height thereof. That is, since the elongation of the plate 10 is limited, the plate 10 must be molded within a range in which the plate 10 is not damaged.

Therefore, in the conventional method, the heat transfer effect on the refrigerant side can be expected, but the effect is insignificant on the air side, and a separate cooling fin 2 is required between the refrigerant tubes 1, and the cooling fin 2 is Further manufacturing steps and joining processes are required. As a result, not only the manufacturing process of the heat exchanger is complicated, but also the manufacturing cost is increased.

And when the cooling fin (1) is damaged there was a disadvantage that the heat exchanger itself does not perform sufficient function.

The present invention has been made in view of the above-described problems, and improves the plate structure of the laminated heat exchanger to simplify the overall manufacturing process and at the same time maintain the function of the heat exchanger even when there is no fin member or does not fully function. It is an object of the present invention to provide a laminated heat exchanger, and a plate manufacturing method of the laminated heat exchanger.

In order to achieve the above object, the present invention is a laminated heat exchanger having a flat tube 30, the refrigerant passage 50 is formed by a pair of plates provided with a refrigerant passage portion between the upper and lower tank portion is mutually bonded In the present invention, the pleats are continuously formed in a direction orthogonal to an extension line connecting the upper and lower tank parts to the left and right both ends junctions, including the refrigerant passages of the respective plates, and the pleats on the left and right both ends portions are compressed to form a flat joint surface. It is characterized by that it is possible.

And the plate is a series of manufacturing processes, that is, the first step of forming a corrugation in a roll forming (roll forming) on the part except the tank portion forming position of the aluminum plate; A second step of forming a tank portion by a pressing portion in the non-wrinkle portion of the aluminum plate; A third step of producing the individual plates by cutting the aluminum plate formed with the corrugations and the tank portion to a predetermined size; And a fourth process of pressing the wrinkled edges of the plates by pressing.

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

3 is a perspective view and a partial enlarged view showing a plate of the laminated heat exchanger according to the present invention, Figure 4 is a perspective view showing a flat tube of the laminated heat exchanger according to the present invention.

As shown in the figure, each plate 10 includes tank portions 22 and 22 'formed at upper and lower sides thereof; It is composed of a refrigerant passage portion 24 which is located between the tank portion 22, 22 ', and is formed with a corrugation 26 protruding outward.

A pair of plates 20 having the above configuration are bonded to each other to face each other to form a flat tube 30 having a refrigerant passage 50 formed thereon.

The tanks 22 and 22 'serve to distribute a refrigerant or cooling water and are processed by a press.

The corrugations 26 are continuously formed in a direction perpendicular to an extension line connecting the upper and lower tank parts 22 and 22 'to the left and right ends of the joints, including the refrigerant passage parts 24 of the plates 20. In this case, the plate 20 is formed by a roll-forming method in the width direction of the plate 20, that is, from the left end to the right end, and is formed at high density, thereby reducing the flow of the refrigerant in a conventional multilayer heat exchanger (see FIGS. 1 and 2). It is configured to simultaneously perform the function of the bead (BEAD) formed for the purpose of disturbance and the fin (FIN) used for the purpose of disturbing the flow of air, the type and its function are described in detail in Figures 4 to 6 Let's explain.

When the flat tube 30 is formed by forming a crimp 26 on both sides of the coolant passage part 24 in the width direction, that is, the corrugations 26 on both left and right ends are formed by pressing to form a flat joint surface 28. In addition, it is possible to prevent the protrusion by overlapping the materials, and to prevent the leakage of the spots at which the respective plates 20 are welded by the flow of the refrigerant or the cooling water.

5 is a cross-sectional view showing a first embodiment of a flat tube according to the present invention, Figure 6 is a cross-sectional view showing a second embodiment of a flat tube according to the present invention, Figure 7 is a flat tube according to the present invention It is sectional drawing which shows 3 Example.

FIG. 5 illustrates a case where the outwardly projected height H of the corrugation 26 formed on the plate 20 is the same as the outwardly projected height h of the tank part 22, and each plate formed outwardly ( 20) As the corrugations 26 come into contact with each other, the air passages 40 have a shape in which they are formed independently without intersecting with each other.

This form can sufficiently replace the function in the plate 20 itself even when there is no fin member for enhancing the air side heat transfer effect.

FIG. 6 illustrates a case where the outwardly projected height H of the corrugation 26 formed on the plate 20 is lower than the outwardly projected height h of the tank 22. 20) Since the corrugations 26 are positioned at regular intervals, the air passages 40 communicate with each other, and the pin member 60 is inserted and installed on the communicated air passages 40.

This form can increase the heat transfer efficiency even when the temperature of the outside air flowing in the upper and lower portions of the air passage 40 is different, and the function of the heat exchanger even when the fin member 60 does not sufficiently function. The advantage is that it can be maintained. Therefore, it is preferable to apply when the robustness of the heat exchanger is not greatly required, that is, when the working pressure of the internal fluid is low.

7 is a pin-shaped corrugated molding having a pin shape into the coolant flow path 50 of the flat tube 30 formed by joining a pair of plates 20 to increase heat transfer of the inner fluid and increase structural strength of the heat exchanger itself. As a result, it is possible to promote flow disturbance of the refrigerant passage 50 and to secure weld points between the pleated molded product and the plate, thereby improving the structural strength.

As the wrinkle molded product, various kinds including an inner fin 70 or the like commonly used in a heat exchanger can be selectively applied.

As described above, in the present invention, the outwardly projected height H of the corrugation 26 formed on the plate 20 is smaller than the outwardly projected height h of the tank portions 22 and 22 '. Is formed to be satisfied.

8 is a process chart showing a plate manufacturing method according to the present invention, briefly look at the plate manufacturing process of the laminated heat exchanger completed through a series of continuous processes as follows.

A first step (S1) of forming the corrugations 26 in a roll forming manner at portions except the tank portions 22 and 22 'forming positions of the aluminum plate 100;

A second step (S2) of forming tank portions (22, 22 ') in the non-wrinkle portion of the aluminum plate (100) by pressing;

A third process (S3) of cutting the aluminum plate 100 having the corrugations 26 and the tank parts 22 and 22 'to a predetermined size to produce individual plates 20; And

The fourth step S4 is formed by pressing the edges of the pleats 26 of the plates 20 by pressing to form the flat joint surface 28.

In the third step (S3) or the fourth step (S4), a subsidiary process including a corner curve treatment of the plate 20 is performed, thereby completing the actual plate 20.

The plate manufacturing process described above is preferably performed sequentially, but may be carried out by changing each of the above processes as necessary. That is, the first step (S1) and the second step (S2) may be performed in reverse, and the third step (S3) of the crimping step and the fourth step (S4) of the cutting step may also be carried out in reverse order. .

On the other hand, the present invention mainly described the formation of the wrinkles in the width direction of the plate, but can also form wrinkles in the longitudinal direction of the plate. (Wrinkles are formed in the longitudinal direction of the plate except the tank portion)

In addition, a flow path may be formed by stacking a plate having a corrugation in the width direction (see FIG. 3) and a plate having a corrugation in the longitudinal direction (not shown).

As described above, according to the present invention, the wrinkles formed by the roll forming can simultaneously perform the functions of the existing beads (BEAD) and fins (FIN), thereby simplifying the configuration of the heat exchanger, as well as heat transfer efficiency and It is also economically efficient.

In addition, it is advantageous in terms of productivity since a large number of plates can be manufactured by one continuous process.

Claims (5)

A pair of plates 20 provided with a refrigerant passage 24 between the tank portions 22 and 22 'formed at the upper and lower sides thereof are joined to each other to have a flat tube 30 having a refrigerant passage 50 formed therein. In the multilayer heat exchanger, Pleats 26 are continuously formed in a direction orthogonal to an extension line connecting the upper and lower tank portions 22 and 22 'to the left and right ends of the joint including the refrigerant passage portions 24 of the plates 20, respectively. And the pleats (26) on the left and right both ends are compressed to form a flat joint surface (28). delete The method of claim 1, Stacked heat exchanger, characterized in that the outward projection height (H) of the corrugation (26) is smaller than the outward projection height (h) of the tank portion (22, 22 ') to satisfy the following formula H <h. The method of claim 1, Stacked heat exchanger, characterized in that the inner fin (70) is interposed in the refrigerant passage (50) formed by the junction between the plate (20). A first step of forming the corrugations 26 in a roll forming manner at portions except the tank portions 22 and 22 'forming positions of the aluminum plate 100; A second step of forming tank portions (22, 22 ') in the non-wrinkle portions of the aluminum plate (100) by pressing; A third step of producing the individual plates 20 by cutting the aluminum plate 100 having the corrugations 26 and the tank portions 22 and 22 'to a predetermined size; And The plate manufacturing method of the laminated heat exchanger, characterized in that the fourth step of pressing the crimped edge of each plate 20 by pressing.

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