JPH11270927A - Connecting structure and connecting member for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure and a connecting member for a heat exchanger in which the heat exchanger can be connected to a receiver tank with a simple structure and a manufacture and attachment are simple with low weight. SOLUTION: In a connecting structure for a heat exchanger for connecting a heat exchanger 1 to a receiver tank 3, a connecting member 6 for connecting the heat exchanger to the receiver tank comprises plate members superposed to have two hollow pipelines. The connecting member 6 abuts on a header pipe with each pipeline corresponding to each communicating hole of the header pipe 2 so that the header pipe and the connecting member are formed integrally. Each pipeline corresponds to and communicates with each through hole of the receiver tank to connect the heat exchanger to the receiver tank. The connecting member 6 is formed by superposing one or two brazing sheets one surface of which is clad with a brazing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used in an automobile refrigeration cycle, and a connection structure and a connection member of a receiver tank for storing a heat exchange medium therein.

[0002]

2. Description of the Related Art In a refrigeration cycle for an automobile, for example, a laminated heat exchanger is known as a heat exchange medium aggregating device. In this type of heat exchanger, a plurality of tubes and fins are alternately stacked, and both ends of the stacked tubes are inserted into and joined to an insertion hole formed in a header pipe. At required positions of these header pipes, a partition plate that partitions the header pipe in the longitudinal direction is provided, and a heat exchange medium flowing from an inlet joint provided in the header pipe meanders between the header pipes a plurality of times. It is provided with a configuration for flowing.

[0003] The heat exchanger may be connected to a receiver tank in order to prevent a decrease in cooling capacity. The receiver tank separates the heat exchange medium, which has undergone heat exchange with external air into a gas-liquid two-phase state in the heat exchanger, by a dryer and a filter inside the receiver tank, and forms a liquid single-phase heat exchange medium. This is a device for flowing again into the heat exchanger and circulating the cooling cycle. Thus, when the receiver tank is connected to the heat exchanger,
Since the refrigerant in the gas-liquid two-phase state is separated into the liquid single-phase liquid refrigerant containing no gas medium and circulated again in the refrigeration cycle, the cooling capacity is prevented from decreasing without reducing the circulation amount of the refrigerant. can do. Further, when the heat exchange medium flows through the inside of the receiver tank, foreign substances in the medium are removed by a filter or the like, and the heat exchange medium can flow in a clean state.

Conventionally, this type of receiver tank is disclosed in
As shown in JP-A-131667 and JP-A-4-320771, etc., there is known a configuration in which a header pipe is integrally mounted adjacent to a header pipe.

[0005] For example, as described in Japanese Patent Application Laid-Open No. 4-131667, the connection structure between the heat exchanger and the receiver tank is adjacent to and parallel to the longitudinal direction of the header pipe of the heat exchanger. That is, the receiver tank is connected by a brazing or bolting via a mounting bracket so as to be in line with the tubes of the heat exchanger that is horizontally stacked.

According to the invention described in Japanese Patent Application Laid-Open No. 4-320771, the lower end of the header pipe is connected to the lower end of the receiver tank via a union, and an arc is drawn on the upper part of the header pipe around the connection portion. There is disclosed a connection structure in which a mounting bracket having a long groove is formed, and a receiver tank is inclined with respect to a header pipe by a pin engaged with the long groove to change a connection position.

[0007] In addition, the invention described in Japanese Patent Application Laid-Open No. Hei 9-170854 discloses a connection structure between a separately provided receiver tank and a heat exchanger, and this receiver tank is closed at one end in the vertical direction. And a mounting block fixed to the other end of the case so as to close the other end of the case.
The mounting block has one connecting surface and L inside the mounting block, each having a horizontal hole and a vertical hole.
A first refrigerant passage and a second refrigerant passage having a letter shape are provided. Further, a connection block formed with a discharge port communicating with the inside of the header pipe is fixed to a side surface of one end of the header pipe of the heat exchanger, and a connection surface corresponding to a connection surface of the mounting block is fixed to the connection block. A connection surface is provided. The joint surface of the mounting block and the joint surface of the connection block are connected by a connecting means to connect the discharge port of the header pipe and the end opening of the receiver tank in an air-tight and liquid-tight manner.

[0008]

However, since the receiver tank is connected to the heat exchanger using the mounting bracket, the mounting block and the like as described above, the mounting structure of the receiver tank is complicated, and therefore, the connecting member is not provided. There is a risk that the manufacturing process and the number of parts will increase due to the connection and manufacturing of the devices, and the manufacturing cost will increase.

A heat exchanger mounted on a vehicle has a certain weight, and the receiver tank itself separates a heat exchange medium composed of a gas-liquid two-phase. It is held inside and has some weight. In order to mount these members on a vehicle with a limited weight, it is desirable to make the connecting members for the heat exchanger and the receiver tank as light as possible.

[0010] It is also desirable that the connecting member is formed and attached without requiring a complicated process.

For example, the mounting block, which is a connecting member described in Japanese Patent Application Laid-Open No. 9-170854, has a side surface facing the header pipe and a flat connecting surface.
Inside the mounting block, an L-shaped first refrigerant passage and a second refrigerant passage composed of a horizontal hole and a vertical hole are provided. In order to form such an L-shaped refrigerant passage, it is necessary to perform cutting from two directions, and the manufacturing process is complicated, and the weight of the connecting member itself is increased.

In view of the above problems, the present invention provides
An object of the present invention is to provide a connection structure and a connection member of a heat exchanger which can connect a heat exchanger and a receiver tank with a simple structure, are easy to manufacture and install, and can reduce the weight.

[0013]

According to a first aspect of the present invention, there is provided a heat exchanger having a fin interposed between a plurality of stacked tubes and a header pipe to which the tubes are joined. A connection structure of a heat exchanger for connecting a receiver tank for performing gas-liquid separation of a heat exchange medium, wherein a header pipe of the heat exchanger has two communication passages through which the heat exchange medium flows in and out of the receiver tank. A hole is formed, and the receiver tank has two through holes through which the heat exchange medium flowing out of the header pipe flows in and out, and a connecting member that connects the heat exchanger and the receiver tank includes a plate member. Two pipes having a hollow inside are formed by being overlapped with each other, and the connecting member aligns each pipe with each communication hole of the header pipe, abuts on the header pipe, and contacts the header pipe and the connecting member. Together And forming said communicating made to match the through hole of the pipe and a receiver tank, a connection structure exchanger arrangement coupled heat exchanger and the receiver tank.

As described above, the connecting member in which the pipes are formed by laminating the plate-like members can be assembled with the header pipe and integrally formed with the header pipe.
The weight of the connecting member can be reduced.

According to a second aspect of the present invention, in the first aspect of the invention, the connection member is formed by laminating one or two brazing sheets having at least one surface clad with a brazing material. It is a connection member which forms the connection structure of the heat exchanger of the formed structure.

According to the present invention, it is possible to easily form a connecting member without requiring a cutting step or the like unlike the prior art, and to reduce the weight of the connecting member by using a brazing sheet. Can be. Moreover, it becomes possible to form a connecting member integrally with the heat exchanger.

According to a third aspect of the present invention, in the first aspect of the invention, the connection member and the receiver tank are connected via a support member formed with two connection pipes. 3 is a connection structure of the heat exchanger.

As described above, when the connection member and the receiver tank are connected via the support member, the receiver tank is stably held by the support member, and the support member is connected to each pipe formed in the connection member. Since it plays the role of positioning, the receiver tank and the connection member can be connected closely and reliably.

According to a fourth aspect of the present invention, in the first aspect, the connection between the header pipe and the connection member and the connection between the connection member and the support member are mutually connected by furnace brazing. 1 is a connection structure of a heat exchanger having the following configuration.

As described above, since the header pipe, the connecting member and the supporting member can be integrally formed, the number of parts and the number of manufacturing steps can be reduced.

According to a fifth aspect of the present invention, in the first, third or fourth aspect of the present invention, a connection structure of a heat exchanger having a structure in which the receiver tank is detachably connected. It is a connecting member.

For example, an O-ring is provided in a connecting pipe connected to the through hole of the receiver tank, or the connection of the receiver tank is made by screwing or the like so that the receiver tank connected to the connecting member or the supporting member can be attached or detached. This makes it possible to easily replace the receiver tank or replace the functional parts inside the receiver tank when the functional parts inside the receiver tank are deteriorated.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration in which a heat exchanger 1 and a receiver tank 2 are connected by a connecting member 6 and a supporting member 7.

FIG. 2 shows a front view of the heat exchanger 1 and the receiver tank 3.

The heat exchanger 1 has a structure in which a plurality of flat tubes and corrugated fins are alternately stacked, and both ends of the stacked flat tubes are connected to the left and right header pipes 2, 2. . In addition, a partition plate that partitions the inside of the pipe in the longitudinal direction is provided inside the header pipe 2 so that the heat exchange medium flowing into the heat exchanger flows meandering between the tubes of the heat exchanger. Is configured. The heat exchange medium flows from a connection hole formed in the header pipe 2 through a communication passage of a connection member 6 and a support member 7 described later, flows into the receiver tank 3, and is separated into gas and liquid inside the receiver tank 3, Again, it flows out through the heat exchanger and circulates through the refrigeration cycle. The arrow in the figure is
The flow direction of the heat exchange medium flowing inside the heat exchanger 1 and the receiver tank 3 is shown.

The header pipe 2 constituting the heat exchanger 1 has:
It is formed by rolling a plate of a predetermined size on which a brazing material is clad by roll forming or the like. A tube end having a wavy fin interposed therebetween is inserted into a tube insertion hole formed in the header pipe 2 and is assembled by brazing in a furnace at the same time as a joint end of the header pipe 2 to form the heat exchanger 1. Is done.

The receiver tank 3 is a vertically long hermetically sealed container, in which a functional component 4 having a gas-liquid separation function such as a filter member and a dryer is held. The receiver tank 3 is formed, for example, by rolling a plate of a predetermined size on which a brazing material is clad by press molding or the like.

The receiver tank 3 of the present embodiment has an opening at one end, and a closing member 5 is provided at the opening end. The closing member 5 has two through holes 51 and 52 communicating with the inside of the receiver tank 3. In addition, a protruding tube that protrudes to the functional component 4 that performs gas-liquid separation is connected to one of the through holes 51.

Next, the connecting member 6 which is a specific example of the present invention will be described.

FIG. 2 is a perspective view showing the brazing sheets 6A and 6B constituting the connecting member 6, and FIG. 3 is a perspective view showing the connecting member 6.

As shown in FIGS. 2 and 3, the connecting member 6 is formed using a plate-shaped brazing sheet having at least one surface coated with a brazing material.

First, a brazing sheet 6A of a predetermined shape
By pressing or the like, two rectangular U grooves 61A, 62
Form A. Then, the brazing sheet 6A is raised from the ends of the rectangular U-shaped grooves 61A and 62A in the outer peripheral direction of the header pipe 2 to form a curved contact surface 63A having a curvature substantially coinciding with a part of the outer periphery of the header pipe 2.

A U-shaped groove 61 protruding in the opposite direction to the U-shaped grooves 61A and 62A is formed on a brazing sheet 6B having the same shape as the brazing sheet 6A by press forming or the like.
B, 62B are formed, and the brazing sheet 6B rises from the contact end where the rectangular U-shaped grooves 61B, 62B abut on the header pipe. A curved contact surface 63B having a curvature substantially coinciding with the portion is formed.

When the brazing sheets 6A and 6B thus pressed are combined, the U grooves 61A and 61B are combined.
The flat portions other than those on which B, 62A, and 62B are formed are joined to each other, and then contacted by brazing in a furnace to form a connecting member 6 having two conduits 61 and 62 formed therein.

A brazing sheet clad with a brazing material in the direction of the contact surfaces 63A and 63B which are in contact with the outer periphery of the header pipe, which is the same surface as the contact surface, is used. To form the connection member 6.

As described above, the connecting member 6 can be easily formed without requiring a cutting step or the like. Also, the connecting member 6 can be assembled to the header pipe 2 and brazed in a furnace, so that the connecting member 6 can be formed at the same time as the header pipe 2 is formed. ), The connecting member 6 can be easily assembled to the header pipe 2 without requiring complicated assembly.

Further, since the connecting member 6 is formed of a brazing sheet, the weight can be reduced as compared with a conventional connecting member.

Further, since the connecting member can be formed by brazing in a furnace or the like without performing cutting or the like as in a conventional connecting member, the manufacturing cost can be reduced.

Next, the receiver tank 3 and the connecting member 6
The support member 7 installed between them will be described.

FIG. 4 is a perspective view showing the support member 7.

As shown in FIG. 4, the connecting member 7 comprises a plate-like flange 73 and two connecting pipes 71, 72.
The flange 73 is provided with the closing member 5 of the receiver tank 3.
And a screw hole 7c for connection with the wire.

The two connecting pipes 71 and 72 project upward and downward from the flange 73, and an O-ring 8 is provided at the tip of the part projecting upward from the flange 73. When the connection pipes 71 and 72 are fitted into the connection holes 51 and 52 of the closing member 5, the O-ring 8 allows the receiver tank 3
And the support member 7 are closely connected, and the receiver tank 3 is stably held by the flange 73 and the O-ring 8.

The connecting pipes 71, 72 projecting downward from a flange 73 (not shown) are fitted to the connecting pipes 61, 62 formed on the connecting member 6, and connected to the connecting pipes 61, 62 of the connecting member 6. 62 and the inside of the receiver tank 3. The support member 7 is assembled to the conduits 61 and 62 of the connection member 6 and can be brazed in a furnace integrally with the header pipe 2 and the connection member 6 of the heat exchanger 1.

As described above, the connecting member 6 and the supporting member 7 can be integrally formed, so that the connection between the receiver tank 3 and the header pipe 2 of the heat exchanger 1 is simplified, and one or two sheets are used. Accurate positioning of the conduits 61, 62 of the connection member 6 formed from the brazing sheets 6A, 6B can be performed, and assemblability is improved.

After connecting the connecting member 6 and the supporting member 7 to the header pipe 2 and brazing in the furnace, the connecting member 6 and the supporting member 7 are screwed to the closing member 5 of the receiver tank 2 from the screw hole 7c of the supporting member 7 with a screw or the like. Accordingly, the receiver tank 3 is more stably held by the support member 7. Therefore, the header pipe 2 and the receiver tank 3 of the heat exchanger 1 can be easily assembled with the airtightness via the connecting member 6 and the supporting member 7. Also, the receiver tank 3
Since it is held by the support member 7 with the O-ring 8 and screws, it has the advantage that the removal is easy and the receiver tank 3 can be easily replaced.

Thus, according to the present invention, the connection structure for connecting the header pipe of the heat exchanger and the receiver tank is as follows:
The header pipe can be formed integrally with the header pipe for brazing in the furnace, the number of parts can be reduced, and airtightness can be maintained without requiring complicated work. Can be assembled. For this reason, the workability is improved and the manufacturing cost can be reduced.

In this example, the connection member was formed by using two brazing sheets. However, a U-groove and an abutting surface were formed in one brazing sheet, and the brazing sheet was bent halfway. It is possible to form a connection member similar to the connection member.

[0048]

As described above, the present invention provides a heat exchanger in which a fin is interposed between a plurality of stacked tubes and a header pipe to which the tubes are joined is provided, and a heat exchange medium is provided. A connection structure of a heat exchanger for connecting a receiver tank for performing gas-liquid separation, wherein a header pipe of the heat exchanger has a heat exchange medium flowing into and out of the receiver tank.
Two communication holes are formed, and the receiver tank is
Inflow and outflow of heat exchange medium flowing out of header pipe 2
Two through-holes are formed, and a connecting member that connects the heat exchanger and the receiver tank is formed with two conduits in which a plate member is overlapped to form a hollow inside, and the connecting member is formed of the header pipe. Matching the respective conduits to the respective communication holes, abutting on the header pipe, integrally forming the header pipe and the connecting member, and matching and communicating the respective conduits and the respective through holes of the receiver tank, It is a connection structure of the heat exchanger of the structure which connects a heat exchanger and a receiver tank.

As described above, the connecting member, in which the pipes are formed by laminating the plate-like members, can be assembled with the header pipe and formed integrally with the formation of the header pipe. In addition, since a process for assembling after forming the header pipe is not required, the manufacturing cost can be reduced by reducing the number of parts and the manufacturing process.

Further, by using a light-weight plate-like member constituting the connecting member, the weight of the connecting member can be reduced, and the versatility can be improved in the case where the weight of the connecting member is limited to a vehicle.

When one or two brazing sheets each having at least one surface clad with a brazing material are superposed, the connecting member can be easily formed by press molding or the like. The connecting member can be formed integrally with the heat exchanger by brazing in a furnace or the like without requiring a cutting step or the like as in the related art.
In order to form a connection member using a brazing sheet,
The weight of the connecting member can be reduced.

When the connection member is connected to the receiver tank via a support member, the receiver tank is stably held by the support member, and the support member serves to position each pipe formed in the connection member. Therefore, the receiver tank and the connection member can be connected closely and reliably.

Further, when the header pipe and the connecting member and the connecting member and the supporting member are connected to each other by furnace brazing, the heat exchanger, the connecting member and the supporting member can be integrally formed, and The number of steps can be reduced, the number of parts for connection can be reduced, the manufacturing cost can be reduced, and the receiver tank can be easily connected to the heat exchanger.

Further, when the receiver tank is detachably connected, when the functional parts inside the receiver tank are deteriorated, replacement of the receiver tank or replacement of the functional parts inside the receiver tank can be easily performed. It becomes possible.

As described above, according to the present invention, a member for connecting the heat exchanger and the receiver tank can be easily formed, and the connection can be made by a simple structure. Reduction and manufacturing cost can be achieved. Also, since the weight of the connecting member is reduced,
It is possible to improve a heat exchanger or the like having a limited in-car weight.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a heat exchanger according to a specific example of the present invention.

FIG. 2 is a perspective view of a brazing sheet constituting a connecting member according to a specific example of the present invention.

FIG. 3 is a perspective view showing a connection member according to a specific example of the present invention.

FIG. 4 is a perspective view showing a support member according to a specific example of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat exchanger 2 header pipe 3 receiver tank 4 functional component 5 closing member 51 through hole 52 through hole 6 connecting member 6A brazing sheet 6B brazing sheet 61 conduit 61A, BU groove 62 conduit 62A, BU groove 63A, B Contact surface 7 Support member 71 Communication tube 72 Communication tube 73 Flange 74 Screw hole 8 O-ring

Claims (5)

[Claims] A fin is interposed between a plurality of stacked tubes, and a heat exchanger provided with a header pipe to which the tubes are joined is connected to a receiver tank for performing gas-liquid separation of a heat exchange medium. In the heat exchanger connection structure, the header pipe of the heat exchanger is formed with two communication holes through which a heat exchange medium flows in and out of a receiver tank, and the receiver tank flows out of the header pipe. Two through-holes for inflow and outflow of the heat exchange medium are formed, and a connecting member that connects the heat exchanger and the receiver tank includes:
A plate member is overlapped to form two conduits having a hollow inside, and the conduits of the connection member are aligned with the communication holes of the header pipe, so that the header pipe and the connection member are integrally formed. A connection structure for a heat exchanger, wherein the heat exchanger and the receiver tank are connected while being formed and communicating with the respective conduits and the respective through holes of the receiver tank so as to match. 2. The heat exchanger according to claim 1, wherein the connecting member is formed by laminating one or two brazing sheets each having at least one surface clad with a brazing material. A connection member that forms a connection structure. 3. The connection structure for a heat exchanger according to claim 1, wherein the connection member and the receiver tank are connected via a support member formed with two connection pipes. 4. The connection structure for a heat exchanger according to claim 1, wherein the connection between the header pipe and the connection member and the connection between the connection member and the support member are mutually connected by furnace brazing. . 5. The connection structure for a heat exchanger according to claim 1, wherein the receiver tank is connected so as to be detachable.