JP2006207950A - Heat exchanger, and manufacturing method of heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger realizing reduction of brazing man-hours, and improvement of manufacture work efficiency. <P>SOLUTION: The heat exchanger is composed such that heat exchanger cores 1a provided with a plurality of tubes 2 passing a refrigerant through interiors, an inlet of a refrigerant inflow side header tank 3 connected to refrigerant inlets of the plurality of tubes 2, and an outlet of a refrigerant outflow side header tank 4 connected to refrigerant outlets of the plurality of tubes 2 are arranged in plural rows. The heat exchanger is provided with a connection member 12 having a plurality of passages communicated with all of the inlets of the refrigerant inflow side header tanks 3 of the heat exchanger cores arranged in plural rows, and the connection member 12 is brazed to the heat exchanger cores arranged in plural rows. With this constitution, the reduction of brazing man-hours and the improvement of work efficiency are realized. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanger used in an air conditioner for vehicles, or a heat exchanger used in a low-temperature environment for maintaining the inside temperature of a refrigerator or the like at a low temperature, and manufacture of the heat exchanger. It is about the method.

  This type of conventional heat exchanger is a heat exchanger in which the cross section is flat and a large number of tubes through which refrigerant flows are arranged, and the direction of the air flow flowing through this heat exchanger, that is, the cross section of the flat tube A group of tubes are arranged in a plurality of stages in the major axis direction, and the heat exchanger in which the group of tubes is arranged in a plurality of stages includes a pair of refrigerant inlet side tanks and a refrigerant outlet side tank, Each group of tubes did not have both tanks.

  Further, in addition to the heat exchanger according to Patent Document 1, a group of tubes are arranged in a plurality of stages in the direction of the airflow flowing through the heat exchanger, and the two tanks are provided for each group of tubes. Although the existence of the prior art document is not known, what is shown in FIGS. 5A, 5B and 6 is known. The configuration will be described below.

  Fig.5 (a) is a top view of another conventional heat exchanger, FIG.5 (b) is the II sectional view taken on the line in Fig.5 (a). The heat exchanger 100 includes heat exchanger cores 100a, 100b, and 100c in which a group of tubes 101 are arranged in three stages. Each heat exchanger core has a group of tubes 101, a refrigerant inlet side tank inlet 103 a that takes in the refrigerant distributed by the distributor 102, and a refrigerant inlet side that feeds the refrigerant into the tube 101 having a refrigerant inlet side tank inlet 103 a. A tank 103, a refrigerant outlet side tank 104 provided on the opposite side of the refrigerant inlet side tank 103 and having a pipe 105 that changes the flow direction of the refrigerant fed from the tube 101 to be folded back, and the refrigerant passes through the tube 101. A pipe 106 that flows out again into the refrigerant inlet side tank 103 and changes its flow direction so as to be folded back toward the refrigerant outlet side tank 104, and a pipe through which the refrigerant is further folded through the tube 101 and fed into the refrigerant inlet side tank 103. 105A and the refrigerant inlet side tank communicating with the accumulator 107 A refrigerant inlet tank outlet 103b provided at the most downstream portion of the click 103, and a.

  Furthermore, the heat exchanger 100 is manufactured by integrating the heat exchanger cores 100a, 100b, and 100c configured in three stages and assembling the heat exchanger cores 100a, 100b, and 100c in three stages, and then brazing the distributor 102 and the accumulator 107 in each stage. It was a thing. In addition, the arrow drawn on the tube shown to Fig.5 (a) has shown the direction through which a refrigerant | coolant flows.

FIG. 6 is a partially enlarged cross-sectional view showing a structure of a brazed portion between a distributor 102 and a refrigerant inlet side tank 103 of a conventional heat exchanger. The refrigerant inlet side tanks 103, 103 b, 103 c of each stage form brazed portions 108, 108 b, 108 c by torch brazing and are respectively coupled to distribution pipes 102 a, 102 b, 102 c of the distributor 102.
Japanese Patent Laid-Open No. 2002-115934 (FIG. 7)

  However, in the conventional heat exchanger in which the heat exchanger cores are assembled in three stages, a manufacturing method is performed in which the distributor 102 and the accumulator 107 are torch brazed for each stage of the heat exchanger core. Therefore, there are problems that the number of steps for the brazing work is large and that it takes time to align the connecting portions.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat exchanger that achieves reduction in the number of brazing steps and improvement in manufacturing workability, and a manufacturing method thereof.

  In order to achieve the above object, the present invention employs the following technical means.

The invention of the heat exchanger according to claim 1 includes a plurality of tubes (2) through which refrigerant flows, and a refrigerant inflow header tank (3) connected to a refrigerant inlet of the plurality of tubes (2). A heat exchanger core (1a, 1b, 1c) comprising an inlet and an outlet of the refrigerant outlet header tank (4) connected to the refrigerant outlet of the plurality of tubes;
While arranging the heat exchanger core (1a, 1b, 1c) in a plurality of stages,
A connecting member (12) having a plurality of flow paths communicating with the inlets of all the refrigerant inflow header tanks (3) of the heat exchanger cores (1a, 1b, 1c) arranged in the plurality of stages, and the plurality At least one of the connecting members (13) having a plurality of flow paths communicating with the outlets of all the refrigerant outflow side header tanks (4) of the heat exchanger cores (1a, 1b, 1c) arranged in a stage. Prepared,
The connecting members (12, 13) and the heat exchanger cores (1a, 1b, 1c) arranged in a plurality of stages are brazed.

  By this means, it is possible to reduce man-hours and improve workability required for brazing the heat exchanger cores arranged in a plurality of stages and the distributor or accumulator.

  In the heat exchanger invention according to claim 2, the heat exchanger cores (1a, 1b, 1c) arranged in the plurality of stages are integrally fixed by coupling members (9, 10, 11), and the heat exchanger It constitutes a unit.

  By this means, the heat exchanger cores are assembled and integrated into a multi-stage core, so that the positional relationship between the connecting member and the heat exchanger core is stabilized, thus further improving assembly workability and product quality. can do.

  According to a third aspect of the present invention, the coupling member (9, 10, 11) is interposed between the heat exchanger cores (1a, 1b, 1c), and both the heat exchanger cores ( 1 a, 1 b, 1 c), and a plurality of tubes (2) that can hold the tube (2).

  By this means, it is possible to hold the adjacent cores among the heat exchanger cores arranged in a plurality of stages, so that the header tank inlet or outlet of the adjacent heat exchanger cores can be stably held. Thus, further improvement in assembly workability and improvement in product quality can be realized.

  According to a fourth aspect of the present invention, the connecting member (12, 13) is the same as the inlet of the refrigerant inflow side header tank (3) or the outlet of the refrigerant outflow side header tank (4). It is formed of a material.

  By this means, since members of the same material can be welded together, it is possible to ensure the quality of welding and prevent corrosion due to joining of dissimilar metals.

According to a fifth aspect of the present invention, there is provided a heat exchanger manufacturing method wherein the plurality of tubes (2) and the plurality of tubes (2) are in communication with the refrigerant inlets of the plurality of tubes (2) and the inlet of the refrigerant inflow header tank (3). The plurality of tubes (2) and the refrigerant are connected to the refrigerant inflow side header tank (3) so that the refrigerant outflow ports of the plurality of tubes (2) and the outlet of the refrigerant outflow side header tank (4) communicate with each other. After connecting the outflow side header tank (4), brazing it in a furnace to manufacture the heat exchanger core (1a, 1b, 1c);
The heat exchanger core (1a, 1b, 1c) is fixed by fixing the plurality of tubes (2) constituting the heat exchanger core (1a, 1b, 1c) with coupling members (9, 10, 11). A process of assembling a heat exchanger unit integrated in multiple stages,
The heat exchanger unit has a plurality of flow paths communicating with the inlets of all the refrigerant inflow header tanks (3) in the heat exchanger unit, and a connecting member (12) connected to the distributor (22) is connected to the heat exchanger unit. Temporarily fixing,
And / or having a plurality of flow paths communicating with the outlets of all the refrigerant outflow header tanks (4) in the heat exchanger unit, and connecting the connecting member (13) connected to the accumulator (13) to the heat Temporarily fixing the exchanger unit;
Brazing the temporarily fixed connecting members (12, 13) and the heat exchanger unit in a furnace;
It consists of

  By this method, it is possible to reduce the man-hours required for brazing between heat exchanger cores arranged in multiple stages and distributors or accumulators and improve workability, and heat exchanger cores arranged adjacent to each other Accordingly, the inlets of all the header tanks or the outlets of all the header tanks are stably held, and a heat exchanger capable of further improving the assembly workability and the product quality is obtained.

  Hereinafter, an embodiment of a heat exchanger of the present invention and a manufacturing method for the same will be described.

(Embodiment 1)
The heat exchanger of the present invention is used in a vehicle air conditioner, and is used in a refrigerator car used in a low temperature environment in order to maintain the internal temperature at a low temperature, for example, an evaporator. It is a component that plays an important role in the refrigeration cycle apparatus. This heat exchanger is firmly fixed to parts on the vehicle side via a side plate that supports a plurality of tubes through which the refrigerant flows so as not to be affected by vibrations of the vehicle.

  Below, the structure of the heat exchanger 1 is demonstrated. Fig.1 (a) is a top view which shows the structure of the heat exchanger of this invention. FIG.1 (b) is the II sectional view taken on the line in Fig.1 (a), and has shown the relationship between the heat exchanger core arranged in 3 steps | paragraphs, and a connection member. FIG. 2 is a schematic diagram showing the arrangement of the tubes in the section taken along line II-II in FIG. Fig.3 (a) is a fragmentary sectional view which shows the junction part of the heat exchanger unit and the connection member by the side of a distributor. FIG.3 (b) is a fragmentary sectional view which shows the junction part of the heat exchanger unit and the connection member by the side of an accumulator.

  The heat exchanger 1 includes heat exchanger cores 1a, 1b, and 1c arranged in three stages, and includes a connecting member 12 or a connecting member 13 that communicates with all of the heat exchanger cores 1a, 1b, and 1c, or Both the connecting member 12 and the connecting member 13 are provided.

  The heat exchanger core 1a includes a plurality of tubes 2 through which the refrigerant flows, a refrigerant inflow side header tank 3 disposed on the refrigerant inflow side at one end in the longitudinal direction of the tubes 2, and the lengths of the plurality of tubes 2 And a refrigerant outflow side header tank 4 disposed on the refrigerant outflow side at the other end in the direction.

  As shown in FIG. 1 (a), about 10 tubes 2 are bundled, one end of the refrigerant inlet is disposed in the refrigerant inflow side header tank 3, and the other end of the refrigerant outlet is provided. It arrange | positions in the refrigerant | coolant outflow side header tank 4, forms the folding | returning part 5,6,7 between the refrigerant | coolant inflow side header tank 3 and the refrigerant | coolant outflow side header tank 4, and forms the refrigerant | coolant inflow side header tank 3 and refrigerant | coolant. The heat exchanger core 1a is configured such that the outflow side header tank 4 is disposed on the same side.

  As another configuration, the refrigerant inflow side header tank 3 and the refrigerant outflow side header tank 4 may be arranged so as to face each other in the longitudinal direction of the heat exchanger core 1a instead of the same side. The number of folded portions may be an even number.

  As shown in FIG. 1B, a plurality of heat exchanger cores having the same configuration as the heat exchanger core 1a thus configured are arranged in the air flow direction along with the heat exchanger core 1a. Are integrally fixed by a coupling member. In the present embodiment, the coupling members 9, 10, in which three heat exchanger cores 1a, 1b, 1c having the same configuration are arranged at appropriate intervals in the longitudinal direction of the heat exchanger cores 1a, 1b, 1c. 11, the heat exchanger unit is integrally formed by supporting at three locations.

  Further, the heat exchanger unit is provided with an appropriate interval in the longitudinal direction of the heat exchanger cores 1a, 1b, and 1c by the rubber member 16 provided on the intermediate plate 17 and the rubber member 18 provided on the side plate 19. The upper and lower sides are sandwiched and held.

  The rubber members 16 and 17 are made of synthetic rubber. For example, when EPDM (ethylene-propylene rubber) is used, its properties are excellent in ozone resistance, heat aging resistance, weather resistance, cold resistance, and solvent resistance. Therefore, it is effective under conditions of severe vibration and heat when used as a component of a vehicle heat exchanger.

  Next, the tube 2 is not particularly limited in its cross-sectional shape as long as the refrigerant flows through the inside thereof. However, an embodiment in which the cross-sectional shape is a flat shape will be described as an embodiment of the present invention. . The tube 2 has a flat shape including a curved surface portion having a curved shape at both ends in the major axis direction of the cross section and a side wall surface having mutually parallel line segments connecting the both ends in the major axis direction of the cross section. Heat exchanged between the air and the tube 2 is performed by the air that is forcibly sent by, for example, not shown) being ventilated along the side wall surface.

  As shown in FIG. 2, the tube 2 has a very long cross-sectional shape having a flat minor axis direction dimension A of about 2 mm and a major axis dimension L of about 24 mm. The tube 2 has a pitch B ( About 10 are arranged in a dimension of about 6 mm), and an air ventilation path 20 is formed between adjacent tubes. Then, the heat exchanger cores 1b and 1c, which are similar to the heat exchanger core 1a composed of about 10 tubes 2 arranged in parallel, are stacked in three stages with an interval P (about 7 mm) in the air ventilation direction, The heat exchanger cores adjacent to each other in the air ventilation direction are arranged at positions shifted from the air circulation direction. Adjacent heat so that the center line in the air ventilation direction of the tubes 2 of the heat exchanger core 1b coincides with the extension of the intermediate line of the pitch B between the tubes 2 of the adjacent heat exchanger cores 1a in the air ventilation direction. It is desirable to arrange the exchanger cores.

  Next, a configuration related to connection and fixation between the heat exchanger unit and the distributor, and a configuration related to connection and fixation between the heat exchanger unit and the accumulator will be described.

  As shown in FIG. 3A, a plurality of flow paths are formed so as to communicate with the inlets of all the refrigerant inflow side header tanks 3 of the heat exchanger cores 1a, 1b, 1c arranged in a plurality of stages in the air ventilation direction. The connecting member 12 is connected and fixed to the heat exchanger unit. The connecting member 12 is fixed to the side plate 8 and further fastened and fixed with screws or the like.

  The connecting member 12 has therein a number of distributed flow passages equal to or more than the number of heat exchanger cores to be connected and fixed, and is connected to the distributor 22 via the joint 15 on the inlet side of the connecting member 12. Has been. The joint 15 has a flow path communicating with each flow path formed inside the connecting member 12.

  The connecting member 12 is preferably made of the same material as the pipe because the brazing portion 3a is formed and fixed by brazing in a furnace with a pipe provided at the inlet of the refrigerant inflow header tank 3. For example, when the tube 2, the refrigerant inflow header tank 3, and the pipe provided at the inlet thereof are made of aluminum, the connecting member 12 is made of aluminum and cast using a mold ( It may be formed by die casting. For the brazing material constituting the brazing portion 3a, an appropriate metal material having a melting point lower than that of the connecting member 12 and a pipe provided at the inlet of the refrigerant inflow side header tank 3 is used. .

  As shown in FIG. 3B, a plurality of flow paths are provided so as to communicate with the outlets of all the refrigerant outlet header tanks of the heat exchanger cores 1a, 1b, and 1c arranged in a plurality of stages in the air ventilation direction. The connecting member 13 is connected and fixed to the heat exchanger unit. The connecting member 12 is fixed to the side plate 8 and further fastened and fixed with screws or the like.

  The connecting member 13 has flow paths distributed in the same number as the number of heat exchanger cores to be connected and fixed on the heat exchanger core side, and these flow paths are collected at the outlet on the accumulator 14 side. A single flow path is formed. The connecting member 13 is connected to the accumulator 14 via the joint 21 on the outlet side of the connecting member 13. The joint 21 has a flow path that communicates with one flow path formed inside the connecting member 15. Since the connecting member 13 is formed and fixed by brazing in a furnace with a pipe provided at the outlet of the refrigerant outflow side header tank 4, the same material as that of the pipe is formed. It is desirable to configure with For example, when the material of the tube 2, the refrigerant outflow side header tank 4, and the pipe provided at the outlet thereof is formed of aluminum, the connecting member 15 is formed of aluminum and cast using a mold ( It may be formed by die casting. For the brazing material constituting the brazing portion 4a, an appropriate metal material having a melting point lower than that of the connecting member 13 and a pipe provided at the outlet of the refrigerant outflow side header tank 4 is used. .

  In this way, the connecting member 12 having a plurality of flow paths communicating with the inlets of all the refrigerant inflow side header tanks 3 of the heat exchanger cores 1a, 1b, 1c arranged in a plurality of stages is connected to the heat exchanger unit. The connecting member 13 having a plurality of flow paths communicating with the outlets of all the refrigerant outflow side header tanks of the heat exchanger cores 1a, 1b, 1c arranged in a plurality of stages in the structure to be fixed or the heat exchanger unit. Since the connection fixing configuration is employed, the fixing bracket required for the conventional torch brazing process can be eliminated by fixing the side plate 8 to the connecting member 12 or 13.

  Further, as a temporary fixing of the pretreatment for brazing the connecting members 12 and 13 to the pipe in the furnace, the pipe is accommodated in the flow path formed in the connecting members 12 and 13 and the outer shape of the pipe is formed in the inner shape of the flow path. When the fitting configuration is adopted, the heat exchanger unit can be positioned with respect to the connecting members 12 and 13 with high accuracy.

  Further, when the connecting members 12 and 13 are formed of the same material as the inlet portion of the refrigerant inflow side header tank 3 and the outlet portion of the refrigerant outflow side header tank 4, respectively, the welding quality is ensured and the dissimilar metals are joined. Corrosion can be prevented.

  In particular, by using aluminum as the material, in addition to the effects of ensuring welding quality and preventing corrosion due to the joining of dissimilar metals, the connecting member can be formed by aluminum die casting, so it is excellent in forming flow paths. Since dimensional accuracy is obtained, the flow rate of the refrigerant distributed from the distributor 22 can be set to a desired value, and a high performance heat exchanger can be obtained.

  Further, as a pretreatment for brazing the connecting members 12 and 13 to the pipe in the furnace, the pipe is placed in the flow path formed in the connecting members 12 and 13 and the outer shape of the pipe is fitted to the inner shape of the flow path. In the case of fixing, it is necessary to appropriately manufacture the inner diameter dimension of the flow path and the outer diameter dimension of the pipe. Also in this respect, the material of the connecting member 12 is aluminum, which is the same material as the inlet portion of the refrigerant inflow side header tank 3 or the outlet portion of the refrigerant outflow side header tank 4, in order to form a flow path. Therefore, there is an effect that positioning of the connecting members 12 and 13 and the pipe can be reliably performed.

  Next, the structure of the coupling members 9, 10, 11 that integrally fix the heat exchanger cores 1a, 1b, 1c arranged in a plurality of stages will be described. The coupling member in the present invention integrally fixes heat exchanger cores arranged in a plurality of stages by holding a tubular tube. In the present embodiment, a comb-like plate is used as an example of a coupling member. Will be described. FIG. 4 shows the relationship between the tube and the comb plate in the section taken along line III-III in FIG.

  As shown in FIG. 4, the coupling member 11 is a comb-shaped plate having a number of comb-shaped slits, and has slit-shaped notches that hold and fix the side walls of the tube 2 in the major axis direction of the tube 2 from both sides. The number of the tubes 2 to be held is equal to or more than the number of the tubes 2 to be held adjacent to the arrangement direction of the plurality of tubes 2 in the same heat exchanger core, and both sides of the arrangement direction of the heat exchanger cores It is the structure formed in. In addition, as shown in FIG. 1B, when the heat exchanger cores are arranged in three stages in the air ventilation direction, two comb-like plates are connected in the arrangement direction of the heat exchanger cores, and are located in the middle. The heat exchanger core 1b is configured to be held by both comb plates from above and below.

  As described above, when a plurality of heat exchanger cores are held and fixed by a comb-like plate as an example of the coupling member 11 and the plurality of heat exchanger cores are integrated, a flat shape with an elongated cross-sectional shape is used. Since the tube can be reliably held in the direction of the minor axis of the cross section, which is easy to deform, it is possible to prevent the tube from being deformed in the assembly work process.

  Moreover, since the comb-shaped plate which is an example of the coupling member 11 is interposed between the heat exchanger cores and holds the plurality of tubes 2 constituting both the heat exchanger cores, the heat is arranged in a plurality of stages. By holding adjacent cores among the exchanger cores, the header tank inlet or outlet of the adjacent heat exchanger cores is stably held, further improving assembly workability and product quality. Improvement can be realized.

  In addition, when the notch portions are provided on both sides in the arrangement direction of the heat exchanger cores, the heat exchanger cores adjacent in the air ventilation direction can be integrated and held by one comb plate. In addition to being able to reduce the number of parts, it has the effect of being easy to handle in the assembly process.

  Below, the manufacturing method of the heat exchanger of this invention is demonstrated.

  First, as a pre-process, a predetermined number of tubes 2 of approximately the same length are provided so that each folded portion has a predetermined odd number (three in the present embodiment) (about ten in the present embodiment). Bending is performed such that all the tubes 2 are bundled so that the inlet end portions and the outlet end portions thereof substantially coincide with each other, and the bending condition of each tube 2 is adjusted (tube bending step). This pre-process is performed by the same number as the number of predetermined heat exchanger cores arranged in the air ventilation direction.

  Next, the plurality of tubes 2 and the refrigerant inflow side header tank 3 are connected so that the refrigerant inflow ports of the plurality of tubes 2 created in the tube bending step and the inlet of the refrigerant inflow side header tank 3 communicate with each other. After connecting the plurality of tubes 2 and the refrigerant outflow side header tank 4 so that the refrigerant outflow ports of the bundled tubes 2 and the outlet of the refrigerant outflow side header tank 4 communicate with each other, put them in a furnace. By brazing, the refrigerant inlets of the plurality of bundled tubes 2 and the refrigerant inflow side header tank 3 are coupled, and the refrigerant outlets of the plurality of bundled tubes 2 and the refrigerant outflow side header tank 4 are coupled. The heat exchanger core is manufactured (heat exchanger core assembly process). In addition, this step is performed by the same number as the number of predetermined heat exchanger cores constituting the heat exchanger.

  Next, heat exchange is performed by supporting and fixing the plurality of tubes 2 of the heat exchanger cores 1a, 1b, and 1c created in the heat exchanger core assembly process so that the side wall surfaces of the tubes 2 are sandwiched from both sides by a comb-like plate. Each of the heat exchanger cores 1a, 1b, and 1c is fixed so that it does not move, and each heat exchanger core to which the tube is fixed is stacked in a plurality of stages (three in the present embodiment) to assemble a heat exchanger unit ( Heat exchanger unit assembly process).

  In addition, when the cross-sectional shape of the tube 2 is a flat shape, the side wall surface in the cross-sectional major axis direction of the tube 2 is supported and fixed at both sides of the comb-shaped plate.

  Next, temporarily fixing the connecting member 12 having a plurality of flow paths communicating with the inlets of all the refrigerant inflow header tanks 3 in the heat exchanger unit and connected to the distributor 22 to the heat exchanger unit, or A step of temporarily fixing the connecting member 13 having a plurality of flow paths communicating with the outlets of all the refrigerant outflow side header tanks 4 in the heat exchanger unit and connected to the accumulator 14 to the heat exchanger unit; Do either.

  In this temporary fixing method, the pipe forming the inlet of the refrigerant inflow side header tank 3 is inserted and fitted into the heat exchanger core side of the flow path formed inside the connection member 12, so that the connection member 12 and the refrigerant are inserted. The inflow side header tank 3 is temporarily fixed. Similarly, the pipe that forms the outlet of the refrigerant outflow side header tank 4 is inserted and fitted into the heat exchanger core side of the flow path formed inside the connection member 13 so that the connection member 13 and the refrigerant outflow side header are inserted. The tank 4 is temporarily fixed. Furthermore, the connecting member and all the heat exchanger cores are coupled simultaneously by performing the step of brazing the temporarily fixed connecting member and the heat exchanger unit in the furnace. Further, at this time, the connecting member is screwed and fixed to the side plate or the like, the heat exchange unit is sandwiched between the rubber members 18 and 16, and the rubber members 18 and 16 are supported by the side plate 19 and the intermediate plate 17.

  By implementing such a heat exchanger manufacturing method, it is possible to reduce the man-hours required for brazing and improve workability, as well as to further improve assembly workability and product quality. A heat exchanger capable of

  When the side wall surface of the tube 2 is supported and fixed in such a manner as to be sandwiched from both sides by the comb-like plate, the plurality of tubes 2 are held together, so that the heat exchanger core is handled in a stable form. Therefore, workability in the manufacturing process is improved.

  In addition, when stacking the heat exchanger cores integrally held by the comb plate in a plurality of stages, the heat exchanger unit can be easily assembled by taking a configuration in which the comb plates are connected and fixed. Workability can be improved.

(A) is a top view which shows the structure of the heat exchanger in Embodiment 1 of this invention. (B) is the II sectional view taken on the line in (a). It is the schematic showing the arrangement | positioning of the tube in the cross section of the II-II line in Fig.1 (a). (A) is a fragmentary sectional view which shows the junction part of the heat exchanger unit in Embodiment 1, and the connection member by the side of a distributor. (B) is a fragmentary sectional view which shows the junction part of a heat exchanger unit and the connection member by the side of an accumulator. FIG. 4 is a view showing the relationship between the tube and the comb-like plate in the section taken along line III-III in FIG. (A) is a top view which shows the structure of the conventional heat exchanger. (B) is the II sectional view taken on the line in (a). It is a fragmentary sectional view which shows the brazing part of the distributor of a conventional heat exchanger, and a refrigerant | coolant inlet side tank.

Explanation of symbols

1 heat exchanger 1a, 1b, 1c heat exchanger core 2 tube
DESCRIPTION OF SYMBOLS 3 Refrigerant inflow side header tank 4 Refrigerant outflow side header tank 9, 10, 11 Connection member 12, 13 Connection member 14 Accumulator 20 Air ventilation path 22 Distributor

Claims (5)

A plurality of tubes (2) through which refrigerant flows, an inlet of a refrigerant inlet header tank (3) connected to a refrigerant inlet of the plurality of tubes (2), and a refrigerant outlet of the plurality of tubes A heat exchanger core (1a, 1b, 1c) provided with an outlet of the refrigerant outflow side header tank (4),
While arranging the heat exchanger core (1a, 1b, 1c) in a plurality of stages,
A connecting member (12) having a plurality of flow paths communicating with the inlets of all the refrigerant inflow header tanks (3) of the heat exchanger cores (1a, 1b, 1c) arranged in the plurality of stages, and the plurality At least one of the connecting members (13) having a plurality of flow paths communicating with the outlets of all the refrigerant outflow side header tanks (4) of the heat exchanger cores (1a, 1b, 1c) arranged in a stage. Prepared,
The heat exchanger, wherein the connecting members (12, 13) and the heat exchanger cores (1a, 1b, 1c) arranged in a plurality of stages are brazed.   The heat exchanger cores (1a, 1b, 1c) arranged in a plurality of stages are integrally fixed by coupling members (9, 10, 11) to constitute a heat exchanger unit. The described heat exchanger.   The coupling members (9, 10, 11) are interposed between the heat exchanger cores (1a, 1b, 1c), and the plurality of tubes constituting both the heat exchanger cores (1a, 1b, 1c). The heat exchanger according to claim 2, wherein the heat exchanger is configured by a comb-like plate capable of holding (2).   The connection member (12, 13) is formed of the same material as the inlet of the refrigerant inflow side header tank (3) or the outlet of the refrigerant outflow side header tank (4). The heat exchanger according to 2, or 3. The plurality of tubes (2) and the refrigerant inflow side header tank (3) are connected so as to communicate the refrigerant inflow ports of the plurality of tubes (2) and the inlet of the refrigerant inflow side header tank (3). After connecting the plurality of tubes (2) and the refrigerant outflow side header tank (4) so that the refrigerant outflow port of the tube (2) and the outlet of the refrigerant outflow side header tank (4) are communicated with each other, Brazing to produce heat exchanger cores (1a, 1b, 1c);
The heat exchanger core (1a, 1b, 1c) is fixed by fixing the plurality of tubes (2) constituting the heat exchanger core (1a, 1b, 1c) with coupling members (9, 10, 11). A process of assembling a heat exchanger unit integrated in multiple stages,
The heat exchanger unit has a plurality of flow paths communicating with the inlets of all the refrigerant inflow header tanks (3) in the heat exchanger unit, and a connecting member (12) connected to the distributor (22) is connected to the heat exchanger unit. Temporarily fixing,
And / or having a plurality of flow paths communicating with the outlets of all the refrigerant outflow header tanks (4) in the heat exchanger unit, and connecting the connecting member (13) connected to the accumulator (13) to the heat Temporarily fixing the exchanger unit;
Brazing the temporarily fixed connecting members (12, 13) and the heat exchanger unit in a furnace;
The manufacturing method of the heat exchanger which consists of.

Images