JP2018087660A - Drawn-cup type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drawn-cup type heat exchanger capable of confirming a joint state of a joint part from appearance, while suppressing pressure loss of a fluid passing between a plurality of tubes.SOLUTION: A drawn-cup type heat exchanger 1 is constituted by joining a pair of joint parts 31, 41 which are end edge parts of a pair of drawn-cup plates 3, 4 respectively so that the pair of drawn-cup plates face each other, and includes: a plurality of tubes 2 which are laminated and arranged in one direction; and a plurality of fins provided 5 in gaps of the plurality of tubes 2. Out of the pair of joint parts 31, 41, at least one (preferably both) has a linear cross sectional shape. In the case where both of the pair of joint parts 31, 41 are on a straight line, a step is provided at an end part.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a drone cup heat exchanger.

  Conventionally, a plurality of tubes constituting a drone cup type heat exchanger are formed by joining between respective joint portions so that a pair of drone cup plates face each other. A joint part is each edge part of a pair of drone cup plates. This joint part is formed in the R shape which curved each edge part in the direction which both space apart (for example, patent document 1). Thereby, the fillet formation after the joint portion is brazed and joined can be confirmed by appearance, and the presence or absence of a brazing defect can be investigated by appearance. The R shape also has the effect of increasing the brazing length by increasing the amount of brazing material that brazes the joint. As a result, the quality of the heat exchanger, particularly the pressure strength, can be ensured.

JP-A-2-208499

  The joint portion of the tube is provided so as to face one side surface in the stacking direction of the plurality of tubes, that is, the flow direction of the air that flows between the tubes and exchanges heat with the refrigerant in the tubes. For this reason, the R shape formed by bending outward from the joint portion increases the facing area of the joint portion facing the air flow, and the air hits the R shape and the fluid flow changes to change the fluid flow. Pressure loss may increase.

  In order to prevent such pressure loss, it is conceivable that the R-shape of the joint portion of each tube is stopped and the pair of joint portions are made flat so that the joint portions are in close contact with each other. Then, it becomes difficult to confirm the brazed state of the joint part with the appearance.

  An object of this indication is to provide the drone cup type heat exchanger which can confirm the joined state of a joint part by appearance, suppressing the pressure loss of the fluid which passes between a plurality of tubes.

  The present disclosure is a drone cup type heat exchanger (1), in which a pair of drone cup plates (3,4, 3A, 4A, 3B, 4B, 3C, 4C) are opposed to each other. A plurality of tubes (2, 2, 1) formed by joining between a pair of joint portions (31, 41, 31A, 41A, 31B, 41B, 31C, 41C), which are the respective edge portions, are stacked in one direction. 2A, 2B, 2C) and a plurality of fins (5) provided in the gaps of the plurality of tubes, and at least one of the pair of joints has a linear cross-section heat It is an exchanger.

  With this configuration, the facing area of the joint portion of the tube can be reduced with respect to the flow of the fluid passing through the heat exchanger, and the amount of air blocked by the joint portion can be reduced. The pressure loss of the fluid passing therethrough can be suitably suppressed. Moreover, since a fillet is formed between a pair of joint parts, the joining state of a joint part can be confirmed with an external appearance.

  ADVANTAGE OF THE INVENTION According to this indication, the drone cup type heat exchanger which can confirm the joined state of a joint part by appearance can be provided, suppressing the pressure loss of the fluid which passes between several tubes.

FIG. 1 is a perspective view showing a schematic configuration of the drone cup heat exchanger according to the first embodiment. FIG. 2 is a plan view of the tube in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2 and is an enlarged view of the vicinity of the joint portion of the tube. FIG. 4 is a cross-sectional view showing the configuration of the joint portion of the tube in the drone cup heat exchanger according to the second embodiment. FIG. 5 is a cross-sectional view illustrating a configuration of a joint portion of a tube in the drone cup heat exchanger according to the third embodiment. FIG. 6 is a cross-sectional view showing the configuration of the joint portion of the tube in the drone cup heat exchanger according to the fourth embodiment. FIG. 7 is a cross-sectional view showing a configuration of a joint portion of a tube in a conventional drone cup heat exchanger as a comparative example.

  Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

[First Embodiment]
The first embodiment will be described with reference to FIGS. The drone cup type heat exchanger 1 according to the first embodiment (hereinafter sometimes simply referred to as “heat exchanger 1”) has a configuration as shown in FIG. In general, the drone cup type heat exchanger 1 is configured by stacking hollow tubes 2 called a so-called drone cup type (Drawn Cup) structure in multiple stages, and a fluid flowing inside the hollow portion of the tube 2 (this embodiment) Then, heat exchange is performed between the refrigerant and the fluid (air in the present embodiment) flowing on the surface of the tube 2. Delon cup type heat exchanger 1 is used for an oil cooler, an evaporator, an intercooler, a radiator, etc., for example.

  As shown in FIG. 1, the drone cup type heat exchanger 1 of the present embodiment includes a pair of drone cup plates 3 and 4 joined in a middle state between the tubes 2 having a flat cross section. The corrugated fins 5 (which may be simply referred to as “fins 5”) are laminated and disposed, and are manufactured by vacuum brazing or brazing integrally in an atmospheric furnace. In the present embodiment, the tube 2 and the corrugated fins 5 are stacked in the vertical direction (the vertical direction in FIG. 1). Further, an air flow path 12 through which air flowing in a direction indicated by an arrow A in FIG. 1 passes is formed in a gap where the corrugated fins 5 are provided between the tubes 2.

  In the following description, the direction in which the tubes 2 are stacked (the vertical direction in FIGS. 1 and 3) is referred to as the “stacking direction”. In addition, as indicated by an arrow A in FIG. 1 that is orthogonal to the stacking direction, the direction of air that is one fluid for heat exchange (the vertical direction in FIG. 2 and the horizontal direction in FIG. 3) is referred to as “air flow direction”. ". The direction perpendicular to the stacking direction and the air flow direction (the left-right direction in FIG. 2) is referred to as a “refrigerant flow direction”, which is the direction in which the refrigerant that is the other fluid performing heat exchange flows.

  The drone cup plates 3 and 4 are press-molded with a brazing material clad on the surface of an aluminum plate or a copper plate, and are laminated so as to form a hollow portion therein. As shown in FIG. 2, communication holes 9 and 10 are formed in the drone cup plates 3 and 4 so that the hollow portion becomes a fluid flow passage. In this embodiment, the flow path 11 provided in the tube 2 is formed in a substantially U shape.

  As shown in FIG. 1, the drone cup type heat exchanger 1 is provided with an inlet 7 and an outlet 8 at positions corresponding to the communication holes 9 and 10 of the end plate 6. As a result, the refrigerant flowing into the heat exchanger 1 from the inlet 7 flows through the air flow path 12 between the tubes 2 while flowing through the substantially U-shaped flow passage 11 from the communication hole 9 of each tube 2. The heat exchange is performed, the communication hole 10 is circulated, and the circuit returns from the outlet 8 of the heat exchanger 1 to the circuit.

  In the present embodiment, the pair of drone cup plates 3 and 4 are connected to one side 21 on the downstream side (upper side in FIG. 2) in the air flow direction during assembly. Then, the pair of drone cup plates 3 and 4 are bent so that the one side 21 serves as a rotation axis, and as shown in FIG. 3, the upstream side in the air flow direction which is the opposite side of the one side 21 The joint portions 31 and 41 of the plates provided on one side 22 abut. And between the contact surfaces of the joint parts 31 and 41 is joined by arbitrary joining techniques, such as brazing joining, for example, and the tube 2 is formed. These joint portions 31 and 41 can also be expressed as the respective edge portions of the drone cup plates 3 and 4.

  As shown in FIG. 3, the tube 2 has a plate shape in which one of the pair of drone cup plates 3 and 4 disposed on the lower side in the stacking direction is disposed on the upper side in the stacking direction. The other drone cup plate 3 has a single-drawing structure having a convex shape that is processed to be convex outward. In the cross-sectional shape seen from the refrigerant flow direction shown in FIG. 3, one of the drone cup plates 4 is formed in a straight shape along the air flow direction, and the other drone cup plate 3 is formed in a convex shape protruding upward in the stacking direction. Has been. An inner fin 13 is installed inside the tube 2.

  As shown in FIG. 3, the cross-sectional shape of the joint portion 41 of the flat-shaped drone cup plate 4 is linearly formed, and the cross-sectional shape of the joint portion 31 of the convex drone cup plate 3 is also linear. Is formed. Here, “the cross-sectional shape of the joint part is a straight line” refers to a shape in which the joint parts 31 and 41 are both flat and the entire surfaces in contact with each other can be in close contact with each other.

  In addition, the pair of joint portions 31 and 41 are arranged so that the end positions in the air flow direction are shifted, thereby providing a step at the end portions of the pair of joint portions 31 and 41. In the example of FIG. 3, the joint portion 41 of the drone cup plate 4 on the lower side in the stacking direction protrudes to the upstream side in the air flow direction with respect to the joint portion 31 of the drone cup plate 3 on the upper side in the stacking direction. A step is formed on the upper side in the stacking direction of the end portions of the joint portions 31 and 41. In addition, contrary to the example of FIG. 3, the joint portion 31 of the drone cup plate 3 on the upper side in the stacking direction protrudes from the joint portion 41, and a step is formed on the lower side in the stacking direction of the end portions of the joint portions 31 and 41. The structure formed may be sufficient.

  Next, the effect of the drone cup type heat exchanger 1 according to the first embodiment will be described. First, with reference to FIG. 7, the problem of the conventional drone cup type heat exchanger will be described. As shown in FIG. 7, in the conventional drone cup type heat exchanger, the joint portions 31D and 41D of the tube 2D are formed in an R shape in which the respective edge portions are curved in the direction in which both are separated from each other. Thereby, the formation of the fillet 14 after the joint portions 31D and 41D are brazed and joined can be confirmed in appearance, and the presence or absence of brazing defects can be investigated in the appearance. Such an R shape also has an effect of increasing the brazing length by increasing the amount of brazing material for brazing the joint. As a result, the quality of the heat exchanger, particularly the pressure strength, can be ensured.

  When the joint portions 31D and 41D of the tube 2D having such an R shape are arranged on the upstream side in the air flow direction, the joint portions 31D and 41D flow between the tubes 2D and exchange heat with the refrigerant in the tube 2D. It is provided so as to face the direction of air flow to be performed. For this reason, the opposing areas of the joint portions 31D and 41D with respect to the air flow are increased by the R shapes that are curved from the joint portions 31D and 41D to the outside in the stacking direction. , The flow is blocked and the air flow is changed, so that the pressure loss of the fluid of the air passing between the plurality of tubes 2D may increase.

  On the other hand, in the drone cup type heat exchanger 1 according to the first embodiment, as shown in FIG. 3, the joint portion 41 of the flat drone cup plate 4 constituting the tube 2 and the convex drone cup Both cross-sectional shapes of the joint portion 31 of the plate 3 are formed to be linear. Thereby, the facing area of the joint portions 31 and 41 of the tube 2 can be reduced with respect to the air flow passing through the heat exchanger 1, and the amount of air blocked by the joint portions 31 and 41 can be reduced. The pressure loss of the air passing between the plurality of tubes 2 can be suitably suppressed.

  Furthermore, in the drone cup type heat exchanger 1 according to the first embodiment, a step is provided at the ends of the pair of joint portions 31 and 41, and the fillet 14 is formed at the step portion. Even if the R shape of the portion is eliminated, the brazed state of the joint portions 31 and 41 can be confirmed by appearance. As a result, the drone cup type heat exchanger 1 according to the first embodiment can confirm the joining state of the joint portions 31 and 41 with the appearance while suppressing the pressure loss of the air passing between the plurality of tubes 2.

  Moreover, the dimension of the lamination direction can be reduced by making the tube 2 into a single-drawing structure. Thereby, adjustment of distribution with the tube 2 and the corrugated fin 5 along a lamination direction becomes easy, and the improvement and miniaturization of the heat exchange performance of the drone cup type heat exchanger 1 can be achieved.

[Second Embodiment]
A second embodiment will be described with reference to FIG. In the second embodiment, as shown in FIG. 4, only the cross-sectional shape of the joint portion 41A of the flat-shaped drone cup plate 4A among the pair of drone cup plates 3A and 4A constituting the tube 2A is linear. It differs from 1st Embodiment by the point which the edge part of 31 A of coupling parts of 3D of convex shape drone cup plates is curving in R shape similarly to the past.

  Even in the configuration of the joint portions 31A and 41A in the second embodiment, the joint portion 31A of the tube 2A with respect to the flow of air passing through the heat exchanger 1 as compared with the conventional joint portions 31D and 41D shown in FIG. , 41A can be reduced, and the amount of air blocked by the joints 31A, 41A can be reduced. Therefore, as in the first embodiment, the air fluid passing between the plurality of tubes 2A can be reduced. Pressure loss can be suitably suppressed.

  In addition, since the end portions of the joint portion 31A and the joint portion 41A are spaced apart and the fillet 14 is formed in this separated portion, the brazed state of the joint portions 31A and 41A can be seen as in the first embodiment. It can be confirmed with. Therefore, the configuration of the second embodiment shown in FIG. 4 can achieve the same effects as those of the first embodiment.

  FIG. 4 illustrates the configuration in which only the cross-sectional shape of the joint portion 41A of the flat-shaped drone cup plate 4A is formed in a straight line, but on the contrary, the joint portion of the convex drone cup plate 3A. Only the cross-sectional shape of 31A may be linearly formed.

[Third Embodiment]
A third embodiment will be described with reference to FIG. As shown in FIG. 5, the third embodiment is a double-throttle structure that is a convex shape that is processed so that both of the pair of drone cup plates 3B and 4B that constitute the tube 2B are convex outward. Different from the first embodiment.

  Similarly to the first embodiment, the third embodiment is formed such that the cross-sectional shapes of both joint portions 31B and 41B of the pair of drone cup plates 3B and 4B constituting the tube 2B are linear, and Since the steps are provided at the end portions of the pair of joint portions 31B and 41B, the configuration of the third embodiment shown in FIG. 5 can achieve the same effects as those of the first embodiment.

[Fourth Embodiment]
A fourth embodiment will be described with reference to FIG. In the fourth embodiment, as shown in FIG. 6, only the cross-sectional shape of the joint portion 41 </ b> C of one of the drone cup plates 4 </ b> C of the pair of drone cup plates 3 </ b> C and 4 </ b> C constituting the tube 2 </ b> C is linear. This is different from the third embodiment in that the end of the joint portion 31C of the drone cup plate 3C is curved in an R shape as in the conventional case. In addition, the structure of the joint parts 31C and 41C of 4th Embodiment is the same as that of the joint parts 31A and 41A of 2nd Embodiment demonstrated with reference to FIG. Therefore, the configuration of the fourth embodiment shown in FIG. 6 can also achieve the same effect as that of the first embodiment for the same reason as in the second embodiment.

  FIG. 6 illustrates a configuration in which only the cross-sectional shape of the joint portion 41C of one of the drone cup plates 4C is formed in a straight line, but on the contrary, the joint portion 31C of the other drone cup plate 3C is illustrated. Only the cross-sectional shape may be linearly formed.

  The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

1: Delon cup type heat exchangers 2, 2A, 2B, 2C: Tubes 3, 3A, 3B, 4B, 3C, 4C: Convex-shaped drone cup plates 4, 4A: Flat plate-like drone cup plates 31, 41, 31A , 41A, 31B, 41B, 31C, 41C: Joint portion 5: Corrugated fin (fin)

Claims (5)

Delon cup type heat exchanger (1),
A pair of joint portions (31, 41, 31A) which are respective edge portions of the pair of drone cup plates so that the pair of drone cup plates (3,4, 3A, 4A, 3B, 4B, 3C, 4C) face each other. , 41A, 31B, 41B, 31C, 41C) and a plurality of tubes (2, 2A, 2B, 2C) arranged in one direction,
A plurality of fins (5) provided in gaps between the plurality of tubes;
With
The cross-sectional shape of at least one of the pair of joint portions is linear.
Delon cup type heat exchanger. The tube (2, 2A) has a convex shape that is processed such that one (4, 4A) of the pair of drone cup plates is flat and the other (3, 3A) is convex outward. It has a single diaphragm structure,
The cross-sectional shape of the joint portion (41, 41A) of the flat-shaped drone cup plate is linear.
The drone cup type heat exchanger according to claim 1. The cross-sectional shapes of the joint portions (41, 31) of both the flat-shaped drone cup plate (4) and the convex drone cup plate (3) are linear,
A step is provided at the ends of the pair of joint portions,
The drone cup type heat exchanger according to claim 2. The tube (2B, 2C) has a double-throttle structure that is a convex shape processed so that both of the pair of drone cup plates (3B, 4B, 3C, 4C) are convex outward.
The drone cup type heat exchanger according to claim 1. The cross-sectional shape of both the joint parts (31B, 41B) of the pair of drone cup plates (3B, 4B) is linear,
A step is provided at the ends of the pair of joint portions,
The drone cup type heat exchanger according to claim 4.

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