JP2013047585A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger capable of enhancing an appearance and achieving miniaturization, while enhancing bending rigidity, productivity, and efficiency of heat exchange.SOLUTION: The present invention comprises: a plurality of heat exchanger constituents 2 provided with header pipes (4, 6) disposed parallel to each other, a plurality of tubes (8) disposed between the header pipes so as to be communicated with both header pipes, and fins (10) disposed between adjacent tubes, in which layered tubes and fins constitute a core part (12) for heat exchange; a plurality of heat exchanger constituents being disposed side by side in the layering direction of the tubes and fins, and being provided with joints (16, 18) for connecting end parts (4a, 6a) of mutually opposing header pipes of adjacent heat exchanger constituents with each other by fitting, and side plates (20, 22, 40, 42, 46, 48) for joining insulating edge parts (12a, 12a) of mutually opposing core parts of adjacent heat exchanger constituents with each other by linkage.

Description

  The present invention relates to a heat exchanger used as an outdoor heat exchanger of a vehicle air-conditioning heat pump system having functions of both a condenser and an evaporator, for example.

  Conventionally, the above-described heat exchanger includes, for example, a pair of header pipes arranged in parallel to each other at a distance, and both the header pipes arranged in parallel to each other at a slight distance between these header pipes. A plurality of tubes communicating with each other and fins disposed between adjacent tubes, and the stacked tubes and fins constitute a heat exchange core. As the heat exchanger, a so-called refrigerant cross-flow type heat exchanger is known in which a pair of header pipes are arranged along the vertical direction and a plurality of tubes are arranged along the horizontal direction. In general, the length of the tube (lateral dimension) is larger than the length (vertical dimension) of the header pipe.

In such a refrigerant cross-flow type heat exchanger, when the refrigerant evaporates, condensed water is generated on each surface of the plurality of tubes along the left-right direction, and water is retained on the surface of the tubes, so that a frosting phenomenon often occurs. The heat exchange efficiency may decrease due to the growth of the frost layer.
Therefore, a so-called refrigerant that arranges the plurality of tubes along the vertical direction as a heat exchanger that suppresses the occurrence of the frosting phenomenon, that is, can promote the elimination of condensed water generated on each surface of the plurality of tubes. A longitudinal flow type heat exchanger has been developed.

In this refrigerant longitudinal flow type heat exchanger, the length (horizontal dimension) of the header pipe arranged along the left-right direction is larger and the tube along the vertical direction is larger than the refrigerant transverse flow type heat exchanger. The length dimension (vertical dimension) is reduced, and the number of tubes is greatly increased accordingly.
In the above-described refrigerant vertical flow type heat exchanger, high dimensional accuracy is required for each of the plurality of tubes and fins for the purpose of greatly increasing the number of tubes and fins. And when forming the connection hole of a fin with a predetermined pitch, since severe processing precision is requested | required, there exists a possibility that productivity of a heat exchanger may fall.

  Therefore, a refrigerant cross-flow type heat exchanger is disclosed in which a plurality of the above heat exchangers are provided as heat exchanger components, and the plurality of heat exchanger components are arranged and connected in the stacking direction of the tubes and fins. (For example, refer to Patent Document 1). This heat exchanger is divided into multiple heat exchanger components, eliminating the need to strictly control the dimensional accuracy of the tubes and fins and the processing accuracy of the tube connection holes to the header pipe, resulting in heat exchange. There is an advantage that the productivity of the vessel increases.

Japanese Patent No. 2898800

  By the way, the outdoor heat exchanger of the vehicle air conditioning heat pump system is mounted on the front surface of the vehicle and is greatly affected by the vibration of the vehicle body and the bending moment when the vehicle is operated. Therefore, it is necessary to increase the bending rigidity of the entire heat exchanger. is there. Although the conventional heat exchanger includes a side plate that connects the edge portions of the core portions facing each other in the heat exchanger structures adjacent to each other vertically, the heat exchanger structures are Since only the side plates are connected, it cannot be said that the entire heat exchanger necessarily has sufficient bending rigidity.

In addition, the conventional heat exchanger is a refrigerant cross-flow type heat exchanger, and the refrigerant vertical flow-type heat exchanger has high dimensional accuracy for the purpose of greatly increasing the number of tubes as described above. Although strict processing accuracy is required, no special consideration is given to this point, and there remains a problem in improving the productivity of the heat exchanger.
In addition, the conventional heat exchanger described above may be caused by configuring the heat exchanger by connecting the heat exchanger components, a decrease in heat exchange efficiency, and appearance due to unitization of the heat exchanger components. No special consideration has been given to the negative effects of the decline and downsizing.

  The present invention has been made on the basis of the above-mentioned circumstances, and its object is to improve the appearance and improve the compactness while improving the bending rigidity, productivity and heat exchange efficiency. Is to provide.

  To achieve the above object, a heat exchanger according to the present invention includes a plurality of header pipes arranged in parallel with each other, and a plurality of header pipes arranged between the header pipes and communicating with both of the header pipes. And a plurality of heat exchanger components, each of which includes a plurality of heat exchanger components, each of which includes a laminated tube and fins to form a heat exchange core. Are arranged side by side in the stacking direction of the tubes and fins, and the heat exchanger adjacent to each other, and a fitting portion that connects the ends of the header pipes facing each other in the heat exchanger structure adjacent to each other by fitting. And a side plate that joins the edge portions of the opposing core portions to each other by connection (Claim 1).

  Preferably, the header pipes are arranged vertically along the left-right direction in a state of being parallel to each other, and the plurality of tubes are arranged along the vertical direction between these header pipes. The plurality of heat exchanger components are arranged side by side in the left-right direction, and the fitting portions are fitted to the ends of the upper header tanks facing each other in the heat exchanger components adjacent to each other on the left and right. And the lower fitting portion in which the ends of the lower header tanks facing each other in the heat exchanger structure adjacent to each other on the left and right are fitted, and the side plates are adjacent to each other on the left and right An inlet side plate that is provided at an end edge of one of the opposing core parts in the heat exchanger structure that faces the inlet side of the air ventilated through the core part. And the outlet side facing the outlet side of the air that is ventilated through the core part, provided at the edge of the other core part of the core parts facing each other in the heat exchanger structure adjacent to each other on the left and right It consists of a side plate (Claim 2).

Preferably, the side plate is formed along the longitudinal direction of the tube and the fin, and both ends in the longitudinal direction are connected to the header tank, and the core portion is bent and connected from the connecting portion. And a connecting portion connected to the opposing side plates.
Preferably, the side plate has an L-shaped cross section.

Preferably, the side plate has a U-shaped cross-section that is bent toward the connecting portion or the connecting portion of the side plate facing the connecting portion or the connecting portion.
Preferably, the side plates are connected to each other so as to shield a gap surrounded by the adjacent core portions and the opposing fitting portions.
Preferably, the side plate has a bolt insertion hole that allows the opposing side plates to be connected to each other by inserting a bolt into the connection portion, and the bolt insertion hole is a direction in which the opposing side plate is ventilated to the core portion. Are formed at positions where the gaps can be shielded without contact with each other.

Preferably, the bolt insertion hole has a hole diameter larger than the diameter of the bolt.
Preferably, the side plate is the same product in which the attaching direction to the end edge portion of the facing core portion in the mutually adjacent core portions is made symmetrically different from that of the air flow direction to the core portion. ).

According to the present invention, the heat exchanger components adjacent to each other are connected to each other by fitting the end portions of the header pipes together, and the edge portions of the core portions facing each other in the heat exchanger component are connected. Since it can connect firmly with the side plate joined by connection, the bending rigidity of the whole heat exchanger can be improved (Claims 1-5).
Further, according to the present invention, the side plates are connected to each other so as to shield a gap surrounded by the adjacent core portions and between the opposing fitting portions, so that between the core portions in the heat exchanger. The air escape passage can be closed, and the entire amount of the air that is ventilated to the heat exchanger can be ventilated to the core portion. Therefore, heat exchange between the air and the refrigerant is promoted, and the heat exchange efficiency of the heat exchanger can be increased (claim 6).

  In addition, according to the present invention, the bolt insertion hole is formed at a position where the opposing side plates can shield the gap without contact with each other in the ventilation direction to the core portion. While absorbing the assembly error, the adjacent core parts can be connected without shifting in the direction of the air flow to the core part, so that the unitization of the heat exchanger can be realized smoothly, and the heat exchanger The appearance can be improved and the compactification can be promoted (claim 7).

Further, according to the present invention, since the bolt insertion hole has a hole diameter larger than the bolt diameter, the dimensional error and assembly error of the heat exchanger can be absorbed in the bolt insertion hole. Can be easily managed, and the productivity of the heat exchanger can be increased (claim 8).
Further, according to the present invention, the side plates are the same product that is different from each other symmetrically in the front-rear direction when viewed from the direction of air flow to the core portion in the direction of the air flow to the core portion in the adjacent core portions. Since it becomes easy to manufacture and manage the components of the heat exchanger, the productivity of the heat exchanger can be further increased (claim 9).

It is a front view of the heat exchanger which concerns on one Embodiment of this invention. It is an expansion perspective view in the connection part of the heat exchanger structure of the heat exchanger of FIG. It is the perspective view which looked at the heat exchanger structure of the right side of FIG. 2 from a different angle. It is a front view of the side plate of FIG. It is sectional drawing which looked at the connection part of the side plate of FIG. 1 from the lower side. It is sectional drawing which looked at the connection part of the side plate used as a modification from the lower side. It is sectional drawing which looked at the connection part of the side plate used as another modification from the lower side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a heat exchanger 1 according to an embodiment of the present invention. The heat exchanger 1 is a refrigerant vertical flow type heat exchanger, and is configured by arranging two heat exchanger components 2, 2 in parallel in the left-right direction.

  The heat exchanger structure 2 includes upper and lower header pipes 4 and 6 arranged in the left-right direction in a state of being parallel to each other, and the header pipes 4 and 6 are arranged along the vertical direction with a slight gap. A plurality of tubes 8 arranged in parallel with each other and communicating with both the upper and lower header pipes 4 and 6 and fins 10 arranged between the adjacent tubes 8 and 8 are laminated. And the core part 12 of the heat exchange is comprised by the fin 10. FIG. The plurality of tubes 8 are joined to the tube connection holes 14 formed at equal pitches in the header pipes 4 and 6 by brazing.

  FIG. 2 is an enlarged perspective view of a connecting portion between the heat exchanger components 2 and 2. In the present embodiment, the length dimension of the header pipes 4 and 6 of the heat exchanger structure 2 is set to be substantially equal to the length dimension of the tube 8, and the two heat exchanger structures arranged in the left-right direction. The bodies 2, 2 form the upper fitting portion 16 by connecting the end portions 4 a, 4 a of the upper header pipes 4, 4 facing each other in the adjacent heat exchanger components 2, 2 by fitting. The end portions 6a and 6a of the lower header pipes 6 and 6 facing each other in the heat exchanger components 2 and 2 adjacent to each other are connected by fitting to form a lower fitting portion 18. ing.

  Furthermore, the heat exchanger structure 2 of the present embodiment includes an inlet side for connecting the edge portions 12a and 12a of the core parts 12 and 12 facing each other in the heat exchanger structures 2 and 2 adjacent to each other by coupling, and The outlet side plates 20 and 22 are connected. Assuming that air is passed through the core portion 12 from the front direction to the back direction as viewed in FIG. 1, the inlet side plate 20 is provided at the edge 12 a of the right core portion 12, and is adjacent to each other. The gap 24 surrounded by the upper and lower fitting portions 16 and 18 facing each other is shielded at the entire area of the gap 24 at the inlet side of the air ventilated through the core portion 12, while the outlet side plate 22 is It is provided at the end edge portion 12 a of the left core portion 12, and the gap 24 is shielded on the outlet side of the air ventilated through the core portion 12.

  FIG. 3 is a perspective view of the right heat exchanger structure 2 seen from different angles, and the upper and lower header pipes in the right heat exchanger structure 2 of the heat exchanger structures 2 and 2 aligned in the left-right direction. 4 and 6 are formed as expanded pipe ends 4A and 6A, respectively, and the expanded pipe ends 4A and 6A of the right header pipes 4 and 6 and the left heat exchanger structure. The upper and lower header pipes 4 and 6 of the upper and lower header pipes 4 and 6 are fitted together to form the upper fitting portion 16 and the lower fitting portion 18 described above.

At this time, the inner fitting surfaces of the expanded end portions 4A and 6A of the right header pipes 4 and 6 and the end portions 4a and 6a of the left header pipes 4 and 6 fitted to the expanded end portions 4A and 6B. The outer mating surface is joined by brazing.
The inlet side and outlet side plates 20 and 22 are joined to the header pipes 4 and 6 by brazing plate connecting holes 26 formed at the same pitch as the tube connecting holes 14, respectively. Fins 10 are provided between 20 and 22 and the tube 8 adjacent thereto. In addition, the code | symbol 28 in a figure is a cover which hold | suppresses the fin 10 located in the right-and-left end part of the heat exchanger structure 2. FIG.

  4 is a front view of the inlet side plate 20, and FIG. 5 is a cross-sectional view of the connecting portion of the inlet side and outlet side plates 20, 22 as viewed from the lower side of FIG. The inlet-side and outlet-side side plates 20 and 22 of the present embodiment are L-shaped in cross section, and are the same product composed of the connecting portion 32 and the connecting portion 30 bent from the connecting portion 32 and connected to each other. In the adjacent core portions 12, the attachment direction to the end edge portion 12 a of the facing core portion 12 is made symmetrical in the front-rear direction as viewed in the direction of air flow to the core portion 12, so that almost the entire area of the gap 24 is shielded. Are connected to each other.

The connection portion 32 is formed along the longitudinal direction of the tube 8 and the fin 10, and both end portions 32 a in the longitudinal direction are inserted into the plate connection holes 26 formed in the upper and lower header tanks 4 and 6. Joined by brazing.
On the other hand, as shown in FIG. 5, the connecting portion 30 is connected to the connecting portion 30 of the side plate 20 (or 22) facing the adjacent core portion 12. The connecting portion 30 is formed with a bolt insertion hole 36 that allows the inlet side and outlet side plates 20 and 22 facing each other to be connected to each other by inserting the bolt 34. The bolt insertion hole 36 is formed at a position where the opposed inlet side and outlet side plates 20, 22 can shield the gap 24 without contacting each other in the ventilation direction to the core portion 12, and the diameter of the threaded portion of the bolt 34. It is a round hole with a larger diameter. By inserting the bolt 34 into the bolt insertion hole 36 and fastening the nut 38, a step is generated in the connecting direction while absorbing the dimensional error and assembly error of the opposite inlet side and outlet side plates 20 and 22. Can be connected without any problem.

As described above, the heat exchanger 1 of the present embodiment has the heat exchanger components 2 and 2 that are adjacent to each other more firmly by the upper and lower fitting portions 16 and 18 and the inlet and outlet side plates 20 and 22. Therefore, the bending rigidity of the entire heat exchanger 1 can be increased.
The inlet side and outlet side plates 20 and 22 are connected to each other so as to shield the gap 24 surrounded by the adjacent core portions 12 and the upper and lower fitting portions 16 and 18 facing each other. By doing so, it is possible to close the air escape passage between the core portions 12 in the heat exchanger 1, and to allow the entire amount of air to be ventilated to the heat exchanger 1 to be ventilated to the core portion 12. Therefore, heat exchange between the air and the refrigerant is promoted, and the heat exchange efficiency of the heat exchanger 1 can be increased.

  In addition, the inlet side and the outlet side plates 20, 22 facing the bolt insertion hole 36 are formed at positions where they can shield the gap 24 without contacting each other in the direction of ventilation to the core portion 12. Since the core portions 12 adjacent to each other can be connected without being displaced in the direction of air flow to the core portion 12 while absorbing the dimensional error and the assembly error of the side and outlet side side plates 20 and 22, the heat exchanger 1 unitization can be realized smoothly, and the appearance of the heat exchanger 1 can be improved and compactification can be promoted.

Moreover, since the bolt insertion hole 36 has a hole diameter larger than the diameter of the bolt 34, the bolt insertion hole 36 can absorb the dimensional error and the assembly error of the heat exchanger 1. And the productivity of the heat exchanger 1 can be increased.
In addition, the inlet side plate 20 and the outlet side plate 22 are front and rear when viewed from the direction in which the air flows to the core portion 12 in the direction of attachment to the end edge portion 12a of the core portion 12 facing each other in the adjacent core portions 12. Since the same product that is symmetrically different is easy to manufacture and manage the components of the heat exchanger 1, the productivity of the heat exchanger 1 can be further increased.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above embodiment, the inlet side and outlet side side plates 20 and 22 are formed in an L-shaped cross section. However, the bolt insertion hole 36 may be formed at a position where the opposing inlet side and outlet side plates 20, 22 in the connecting portion 30 can shield the gap 24 without contacting each other in the ventilation direction to the core portion 12. For example, it is not limited to this shape.

Specifically, as shown in FIG. 6, the inlet side and outlet side plates 40, 42 are provided with bent portions 44 that are bent in the direction in which these connecting portions 30 face each other, and air to the core portion 12 is provided. It may be formed so as to have a U-shaped cross-section that is the same product that is symmetrically different in the front-rear direction.
In addition, as shown in FIG. 7, the inlet side and outlet side side plates 46, 48 are provided with bent portions 50 that are bent in the direction in which these connecting portions 32 face each other, and the direction of air flow to the core portion 12. In other words, it may be formed to have a U-shaped cross-section that is the same product that is symmetrically different from front to back.

In the case of FIGS. 6 and 7 as well, as in the case of the above embodiment, the heat exchanger 1 is unitized and the appearance of the heat exchanger 1 while absorbing the dimensional error and assembly error of the opposing side plates. It is possible to improve productivity and promote compactness, and to increase the productivity of the heat exchanger 1.
Moreover, by forming the side plate with a U-shaped cross section, the rigidity of the side plate can be increased and the durability thereof can be improved as compared with the case where the side plate has an L-shaped cross section.

Further, in the above embodiment, the bolt insertion hole 36 is a round hole, but may be a long hole as long as it has a hole diameter larger than the diameter of the bolt 34. In this case, the dimensions of the heat exchanger 1 are in the bolt insertion hole 36. Errors and assembly errors can be absorbed more effectively.
Moreover, in the said embodiment, although the heat exchanger 1 demonstrated the case where the two heat exchanger structure 2 and 2 were arranged side by side in the left-right direction, it is not limited to this, A heat exchanger structure It is good also as a structure which arranges 2 or more 3 pieces.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Heat exchanger structure 4 Header pipe (upper header pipe)
4a End 6 Header pipe (lower header pipe)
6a end portion 8 tube 10 fin 12 core portion 12a end edge portion 16 fitting portion (upper fitting portion)
18 Fitting part (lower fitting part)
20, 40, 46 Side plate (Inlet side plate)
22, 42, 48 Side plate (exit side plate)
24 Gap 30 Connecting portion 32 Connection portion 32a Both ends 34 Bolt 36 Bolt insertion hole

Claims (9)

Header pipes arranged in parallel with each other, a plurality of tubes arranged between these header pipes and communicating with both of the header pipes, and fins arranged between the adjacent tubes Comprising a plurality of heat exchanger components comprising a core portion for heat exchange with the laminated tubes and the fins;
The plurality of heat exchanger components are arranged side by side in the stacking direction of the tubes and the fins,
A fitting portion for connecting the ends of the header pipes facing each other in the heat exchanger structure adjacent to each other by fitting; and
A heat exchanger comprising: a side plate that joins end edges of the core portions facing each other in the heat exchanger structure adjacent to each other by connection. The header pipes are vertically arranged along the left-right direction in a state of being parallel to each other, and the plurality of tubes are arranged along the vertical direction between the header pipes, and both the upper and lower header pipes The plurality of heat exchanger components are arranged side by side in the left-right direction,
The fitting portion is
An upper fitting portion in which the end portions of the upper header tank facing each other in the heat exchanger structure adjacent to each other on the left and right sides are fitted;
It consists of a lower fitting part in which the ends of the lower header tank facing each other in the heat exchanger structure adjacent to each other on the left and right sides are fitted.
The side plate is
The inlet facing the inlet side of the air that is provided at the end edge of one of the core portions facing each other in the heat exchanger structure adjacent to each other on the left and right, and is ventilated through the core portion Side side plates,
Outlet facing the outlet side of the air that is provided at the end edge portion of the other core portion among the core portions facing each other in the heat exchanger structure adjacent to each other on the left and right The heat exchanger according to claim 1, comprising a side side plate. The side plate is
A connecting portion that is formed along the longitudinal direction of the tube and the fin, and that both ends of the longitudinal direction are connected to the header tank,
3. The heat exchanger according to claim 1, further comprising a connection portion that is bent from the connection portion and connected to the side plate facing the adjacent core portion.   The heat exchanger according to claim 3, wherein the side plate has an L-shaped cross section.   The said side plate makes | forms the cross-section U shape bent toward the said connection part or the said connection part of the said side plate which the said connection part or the said connection part opposes. Heat exchanger.   6. The heat according to claim 4, wherein the side plates are connected to each other so as to shield a gap surrounded by the core portions adjacent to each other and between the fitting portions facing each other. Exchanger. The side plate has bolt insertion holes that allow the side plates facing each other to be connected to each other by inserting bolts into the connecting portion,
The heat exchange according to claim 6, wherein the bolt insertion hole is formed at a position where the opposing side plates can shield the gap without contacting each other in the ventilation direction to the core portion. vessel.   The heat exchanger according to claim 7, wherein the bolt insertion hole has a hole diameter larger than a diameter of the bolt.   The side plate is the same product in which the mounting direction to the end edge portion of the core portion facing each other in the core portions adjacent to each other is different symmetrically in the front-rear direction when viewed in the direction of air flow to the core portion. The heat exchanger according to claim 8, wherein the heat exchanger is a heat exchanger.

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