JPH1163732A - Connecting structure for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting structure for a heat exchanger in which a heat exchanger and a receiver tank are connected at a free angle and a degree of freedom of fixing a vehicle body is improved. SOLUTION: There are provided a connecting structure and a connecting member for a heat exchanger in which a header pipe 6 of the heat exchanger and a receiver tank 2 storing liquid refrigerant. The header pipe 6 is formed with two communicating holes through which heat exchanging medium may flow in or out. Then, each of the communication holes of the header pipe and each of the through-pass holes of the receiver tank have a predetermined length and the receiver tank 2 is connected to the header pipe 6 at an optional angle by the connecting member 26 having a hollow inner section and formed with a stepped part having both ends engaged with each of the communication holes and each of the through-pass holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a heat exchanger used in an automobile refrigeration cycle and 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. In the heat exchanger, the heat exchange medium, which has undergone heat exchange with external air and is in a gas-liquid two-phase state, is gas-liquid separated by a dryer and a filter inside the receiver tank.
This is a device that is used as a liquid single-phase heat exchange medium, flows again into the heat exchanger, and circulates the cooling cycle. Thus, when the receiver tank is connected to the heat exchanger, the refrigerant in the gas-liquid two-phase state is separated into the liquid single-phase liquid refrigerant containing no gas medium, and circulates again in the refrigeration cycle. Therefore, it is possible to prevent the cooling capacity from lowering without reducing the circulation amount of the refrigerant. 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, JP-A-4-320771, etc., it is integrally mounted adjacent to the header pipe.

For example, as described in Japanese Patent Laid-Open No. Hei 4-131667, the connection structure between the heat exchanger and the receiver tank is parallel to the longitudinal direction of the header pipe 6 of the heat exchanger 1 as shown in FIG. Adjacent, that is,
The receiver tank 30 is positioned on an extension of the horizontally stacked tubes of the heat exchanger, and is connected by a brazing or bolting via a mounting bracket 31. JP-A-4-131667 As shown in FIG. 10, the lower end of the header pipe 6 and the receiver tank 3
0 is connected via a union 32 to the upper end of the header pipe 6, and a mounting bracket 33 is formed on the upper portion of the header pipe 6. The receiver tank 30 is inclined with respect to the header pipe 6 by changing the position of the pin 35 in the long groove portion 34 of the mounting bracket 33, thereby changing the connection position. Also disclosed are connection structures that are connected as possible.

[0006]

However, when a separate receiver tank is provided in the header pipe of the heat exchanger, the ventilation area of the heat exchanger is reduced by the receiver tank, and the performance of the heat exchanger is degraded. The inconvenience of doing so occurred.

That is, these receiver tanks hold a filter, a desiccant, and the like in order to separate a heat exchange medium composed of a gas-liquid two-phase, and require a certain volume. In addition, these receiver tanks are usually mounted right beside the header tank in many cases, and heat exchangers mounted on vehicles have a limited maximum frontal area due to their mounting space. Since the front area of the heat exchanger has to be reduced, the performance of the heat exchanger is deteriorated. In addition, there is a problem in that the degree of freedom in mounting is limited due to a problem in the mounting space of the vehicle.

In the case of the structure shown in FIG. 10, the header pipe 6 and a part of the receiver tank 30 in the longitudinal direction are connected to form a long groove having an arc around the connection (union 32). Bracket 33 formed with
Even if the receiver tank 30 is attached to the vehicle body by inclining the receiver tank 30 forward (or rearward) with respect to the header pipe 6, heat exchange when the receiver tank is attached to the heat exchanger The problem of having to reduce the positive area of the heat exchanger itself was not solved because it was mounted in the limited space of the vehicle body without changing the frontal area of the entire vessel and the receiver tank.

In view of the above problems, the present invention
An object of the present invention is to provide a connection structure of a heat exchanger that can connect a heat exchanger and a receiver tank at an arbitrary angle, reduce the entire surface area, and improve the degree of freedom in mounting the vehicle body.

[0010]

According to the first aspect of the present invention, a fin is interposed between a plurality of laminated tubes, and a pair of header pipes having ends joined to the tubes are provided. Heat exchanger, the connection structure of the heat exchanger that connects the receiver tank that stores the liquid refrigerant therein,
The header pipe of the heat exchanger is formed with two communication holes through which the heat exchange medium inside the header pipe flows in and out, and the receiver tank is provided with a heat exchanger at a position corresponding to each of the two communication holes of the header pipe. Two through-holes for allowing the medium to flow into and out of the receiver tank are formed, and each communication hole of the header pipe and each of the corresponding through-holes of the receiver tank are connected by a connection member, and the connection member is a predetermined connection member. It has a length, the inside is formed in a hollow shape, and both ends are formed with a step portion that engages with each of the communication holes and each through hole, and further, the heat exchanger, the receiver tank, and the connection member are integrated. It is a connection structure of the heat exchanger of the structure joined by brazing.

As described above, the entrance and exit communication holes formed in the header pipe correspond to the entrance and exit through holes formed in the receiver tank, and the communication holes and the through holes are formed at both ends of a connection member having a predetermined shape. The header tank and the receiver tank are connected by engaging the stepped portion, so that the receiver tank can be connected at an arbitrary angle to the center of the header pipe, without reducing the frontal area of the heat exchanger. To
The heat exchange performance can be maintained, and the degree of freedom of attachment to the vehicle body can be improved.

According to a second aspect of the present invention, in the heat exchanger connecting structure according to the first aspect, the steps formed at both ends of the connecting member are formed at one end of the connecting member. The bearing surface of the stepped portion is formed in a concave shape corresponding to the outer peripheral curved shape of the header pipe, and the seating surface of the step formed at the other end of the connection member has a concave surface corresponding to the outer peripheral curved shape of the receiver tank. The protrusions of each step formed at both ends of the connection member are fitted into each communication hole of the header pipe and each through hole of the receiver tank, and each seat surface of each step is connected to the header pipe. And a connection structure of a heat exchanger configured to be in contact with the receiver tank.

As described above, when each seat surface of the step formed at both ends of the connection member is formed in a concave shape corresponding to the curved shape of the header pipe and the receiver tank, the projection of each step is formed. When the header pipe and the receiver tank are connected by being engaged with the respective communication holes of the header pipe and the respective through holes of the receiver tank, the seating surface of each step portion closely contacts the outer peripheral curved surface of the header pipe and the outer peripheral curved surface of the receiver tank. Since it is brazed, the brazing strength can be improved.

According to a third aspect of the present invention, in the connection structure for a heat exchanger according to the first aspect, the protrusions of the step formed at both ends of the connection member project in the outer peripheral direction. , A connection structure of a heat exchanger having a configuration in which a retaining portion for locking a connection member inside a header pipe and a receiver tank is formed.

As described above, when the retaining portion is formed on the projection of the step portion of the connecting member which engages with each of the connection holes of the header pipe and each of the through holes of the receiver tank, the header pipe and the receiver tank can be provided with the stopper. The inclination and detachment of the temporarily fixed connection member can be prevented, the assemblability can be improved, and the brazing strength can be secured.

According to a fourth aspect of the present invention, in the connection structure for a heat exchanger according to the first aspect, the connection structure includes a burring projecting outward from the receiver tank through each through hole of the receiver tank. Is formed, the burring is fitted into each communication hole of the header pipe, and the heat exchanger and the receiver tank are joined together by integral brazing.

As described above, the burring formed in each through hole of the receiver tank is inserted into the communication hole of the header pipe, and the heat exchanger and the receiver tank are connected. They can be connected, and the number of components can be reduced without using other members, and the manufacturing cost can be reduced.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. Components common to those shown and described in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a front view of the heat exchanger 1 and the receiver tank 2, FIG. 2 is a plan view showing a connection structure of the heat exchanger 1 and the receiver tank 2, and FIG. 3 is a connection of the heat exchanger 1 and the receiver tank 2. FIG. 4 is a vertical sectional view showing a structure connected by members, and FIG. 4 is a sectional view taken along line XX of FIG.

As shown in FIG. 1, in this heat exchanger 1, a plurality of flat tubes 4 and corrugated fins 5 are alternately laminated.
Both ends of the laminated flat tubes 4 are inserted into and connected to the tube insertion holes 8 of the header pipes 6, 7, respectively. Side plates 9 having a U-shaped cross section are disposed on the upper and lower ends of the stacked flat tubes 4. The header pipes 6, 7 are:
It is formed by rolling a plate of a predetermined size on which a brazing material is clad by roll forming or the like. The openings at the upper and lower ends of the header pipes 6 and 7 are closed by caps 10. In addition, a partition plate 11 is provided at required positions of the header pipes 6 and 7, and an inlet joint member 12 and an outlet joint member 13 are provided for the header pipe 7 not connected to the receiver tank 2. Further, as shown in FIG. 3, an outlet communication hole 14 and an inlet communication hole 15 for flowing a heat exchange medium are formed in the header pipe 6 connected to the receiver tank 2.

Next, a connection structure and a connection member between the heat exchanger 1 and the receiver tank 2 will be described.

As shown in FIGS. 3 and 4, the receiver tank 2 of the present embodiment is a vertically long hermetic container, and this hermetic container is mainly constituted by a double tube of an inner tube 16 and an outer tube 17. ing. The outer tube 17 is manufactured by rolling a plate of a predetermined size clad with a brazing material by press molding or the like.

The inner tube 16 has at its lower end a bulging portion 18 bulging toward the outer tube 17, and the outer diameter of the bulging portion 18 is the same as the inner diameter of the outer tube 17. It is formed as follows. The portion of the inner tube 16 above the bulging portion 18 is formed to have a diameter slightly smaller than the inner diameter of the outer tube 17.

Therefore, when the inner tube 16 is inserted into the outer tube 17, the bulging portion 18 of the inner tube 16 is press-fitted or pressed against the inner wall of the outer tube 17, and a flow passage 19 is formed between the outer tube 17 and the inner tube 16. Is formed in the double tube structure.

The inner pipe 16 and the outer pipe 17 are connected to the receiver tank 2
Are formed so as to communicate with each other, and the upper and lower end openings of the outer tube 17 are closed by closing members 20 and 21. A filter member 22 having a filter function is provided inside the inner tube 16, and the filter member 22 holds a bag 23 containing a desiccant. Further, the inlet through-hole 24 communicating with the flow passage 19 is provided with the outer pipe 1.
7, an outlet through-hole 25 is formed in the bulging portion 18 so as to insert the outer tube 17 and the inner tube 16 and communicate with the inside of the inner tube. The inlet through-hole 24 is connected to an outlet communication hole 14 formed in the header pipe 6 and a connecting member 26 described later.
The outlet through-hole 25 is connected to the inlet communication hole 15 formed in the header pipe 6 by a connecting member 27 described later. In this example, the outlet communication hole 14 of the header pipe 6 corresponds to the inlet through hole 24 of the receiver tank 2, and the inlet communication hole 15 of the header pipe 6 corresponds to the outlet through hole 25 of the receiver tank 2. The receiver tank 2 can be attached to the header pipe 6 at an arbitrary angle α since the receiver tank 2 is connected to the receiver tank 2 by short pipe-shaped connecting members 26 and 27 described later (see FIG. 2).

Next, the connecting member 2 shown in FIGS.
6, 27 will be described in detail with reference to FIG. FIG. 5 is a perspective view of the connection member 26.

As shown in FIG. 5, the connecting member 26
The connecting member 26 is formed in a short tube having a predetermined length and having a hollow inside for flowing a heat exchange medium.
Is coated with a brazing material.

The connecting member 26 has stepped portions 26A and 26B having projecting portions 26a and 26b at both ends. Step 26A formed at one end of connection member 26
Has a projection 26a, and the projection 26a is configured to engage with the outlet communication hole 14 of the header pipe 6.
The protruding portion 26a is formed in the inlet communication hole 14 of the header pipe 6.
Is formed to have a width approximately equal to the wall thickness of the header pipe 6 so as not to protrude into the header pipe 6 when engaged.

The seating surface 26c of the stepped portion 26A, that is, the contact surface that comes into contact with the header pipe 6 when the projection 26a is engaged with the outlet communication hole 14 of the header pipe 6, Has a concave shape conforming to the outer peripheral curved surface shape of.

The step 26B formed at the other end of the connecting member 26 has a projection 26b, and the projection 26b is configured to engage with the inlet through hole 24 of the receiver tank 2. The protrusion 26 b is formed to have a width approximately equal to the wall thickness of the outer pipe 17 of the receiver tank 2 so as not to protrude into the receiver tank 2 when engaged with the inlet through hole 24 of the receiver tank 2. Have been.

The seat surface 26d of the step portion 26B, that is, the surface that comes into contact with the receiver tank 2 when the projection 26b is engaged with the inlet through hole 24 of the receiver tank 2, is formed on the outer periphery of the receiver tank 2. It has a concave shape that matches the curved shape.

Although not shown, the header pipe 2
Communication hole 15 of the tank and outlet through hole 25 of the receiver tank 2
Are similarly formed with step portions formed at both ends thereof.

Therefore, the outlet communication hole 14 of the header pipe 6
The connection between the outlet communication hole 14 and the entrance through hole 24 by engaging the step 26A of the connection member 26 with the entrance through hole 24 of the receiver tank 2 and the connection member 26B. When the inlet communication hole 15 and the outlet through hole 25 of the receiver tank 2 are connected by the connecting member 27, the connecting members 26 and 27 of this example connect the heat exchanger 1 and the receiver tank 2 and also connect the header pipe 6 and the receiver pipe 2. The structure constitutes the refrigerant flow passage of the tank 2.

As described above, in this embodiment, the outlet communication hole 14 of the header pipe 6 is provided with the inlet through hole 24 of the receiver tank 2, and the header pipe 6 is provided with the outlet through hole 25 of the receiver tank 2. Correspondingly, since the header pipe 6 and the receiver tank 2 are connected by the joint members 26 and 27, the receiver tank 2 can be attached to the header pipe 6 at an arbitrary angle α, and the front area of the heat exchanger 1 is reduced. Without doing so, the heat exchange performance can be maintained and the degree of freedom of attachment to the vehicle body can be improved.

In the two step portions formed at both ends of the connecting members 26 and 27, the seat surfaces of the two step portions are the header pipe 6
And the concave shape conforming to the outer peripheral surface shape of the receiver tank 2, the projections of each step are connected to the inlet / outlet communication holes 14, 15 of the header pipe 6 and the inlet / outlet through holes 24, 25 of the receiver tank 2. At this time, since the seating surfaces of the step portions are in close contact with the outer peripheral surface curved surfaces of the header pipe 6 and the receiver tank 2, they can be prevented from coming off or tilting. Can be improved. In addition, since the shoulder surfaces of the step portions of the connection members 26 and 27 are brazed in close contact with the outer peripheral curved surfaces of the header pipe 6 and the receiver tank 2, brazing strength can be improved.

Next, another specific example of the connecting member will be described.

FIG. 6 shows a heat exchanger 1 and a receiver tank 2
3 is a plan view showing the connection structure of FIG.

As shown in FIG. 6, the connecting member 28 has a predetermined length, and is formed in a short tubular shape having a hollow inside to allow a heat exchange medium to flow. The connection member 2
8 has step portions 28A and 28B having protrusions 28a and 28b at both ends. The step 28A formed at one end of the connection member 28 has a projection 28a, and the projection 28a is configured to engage with the outlet communication hole 14 of the header pipe 6. The protrusion 28 a is formed to have a predetermined width that protrudes into the header pipe 6 when engaged with the outlet communication hole 14 of the header pipe 6. The protrusion 28a is formed with a retaining portion 28e that protrudes in a peripheral direction at a predetermined position from an end of the protrusion 28a. The seat surface 28c of the step 28A has a concave shape conforming to the outer peripheral curved shape of the header pipe 6.

On the other hand, a step 28B formed at the other end of the connection member 28 has a projection 28b, and the projection 28b is configured to engage with the inlet through hole 24 of the receiver tank 2. The protrusion 28 b is formed to have a predetermined width that protrudes into the receiver tank 2 when engaged with the inlet through hole 24 of the receiver tank 2. The protrusion 28b is formed with a retaining portion 28f that protrudes in a peripheral direction at a predetermined position from an end of the protrusion 28b.
The seat surface 28d of the step portion 28B has a concave shape that matches the outer peripheral curved shape of the receiver tank 2.

As described above, when the stoppers 28e and 28f projecting in the outer peripheral direction are formed on the projections of the two steps 28A and 28B formed at both ends of the connecting member 28, the stoppers 28e are provided. , 28f lock the connection member 28 to the header pipe 6 and the receiver tank 2.
The connecting member 28 can be securely assembled to the header pipe 6 and the receiver tank 2, and the inclination of the connecting member 28,
Detachment can be reliably prevented, and brazing strength can be ensured.

FIG. 7 shows a case where the union 29 is mounted on the header pipe 6 and the receiver tank 2 of the heat exchanger 1 when the heat exchanger 1 and the receiver tank 2 are connected by the connecting member. It is a top view.

That is, the inlet / outlet communication holes 14, 15 of the header pipe 6 and the inlet / outlet through holes 24, 15
25 are connected by connecting members 26 and 27, and the header pipe 6 and the upper part of the receiver tank 2 are connected via a union 29 as shown in FIG.

The union 29 is formed with a joining portion 29A having a concave shape along the outer peripheral surface shape of the header pipe 6 and a cylindrical portion 29B that matches the outer circumference of the receiver tank 2. The joint portion 29A of the union 29 abuts on the header pipe 6, the receiver tank 2 is fitted into the cylindrical portion 29B and the receiver tank 2 is fixed to the header pipe 6, and the header pipe 6, the receiver tank 2 and the union 29 are integrated. It is brazing to.

Therefore, the receiver tank 2 is fixed to the header pipe 6 by the union 29 at the upper part, and is connected and fixed to the header pipe 6 by the connecting members 26 and 27 at the lower part, so that the receiver tank 2 is inclined. Without being attached to the header pipe 6, a stable connection structure between the heat exchanger 1 and the receiver tank 2 can be obtained.

As described above, when the receiver tank 2 is fixed at the upper and lower portions, the vibration resistance of the connection structure between the heat exchanger 1 and the receiver tank 2 can be improved, and vibration resistance such as a truck is required. The heat exchanger and the receiver tank of the present embodiment can be used in a car body to be used.

Next, an example in which the receiver tank 2 is connected to the header pipe 6 without using the above-described connecting member will be described.

FIG. 8 is a partial longitudinal sectional view of the header pipe 6 and the receiver tank 2 showing a connection structure for connecting the header pipe 6 and the receiver tank 2 without using a separate connecting member.

As shown in FIG. 8, a burring 24a projecting outside the receiver tank 2 is formed in the inlet through hole 24 formed in the outer pipe 17. The burring 24 a is formed, for example, in the receiver tank 2 by an inlet communication hole 24.
After forming, using a jig having a sphere having a diameter slightly larger than the diameter of the entrance through hole 24 from the through hole 24,
The jig can be easily formed by drawing out the jig from the entrance through-hole 24. The outer circumference of the burring 24a is formed to have a diameter slightly smaller than the inner diameter of the outlet communication hole 14 of the header pipe 6.

Therefore, the burring 2 of the receiver tank 2
The receiver tank 2 and the header pipe 6 are connected in a state where the flow path of the heat exchange medium is secured by fitting the 4a into the outlet communication hole 14 of the header pipe 6 and brazing.

Although not shown, the receiver tank 2
Similarly, a burring projecting outward from the outlet communication hole is formed in the outlet communication hole, and the burring is fitted into the inlet communication hole of the receiver tank 2 and connected by brazing.

As described above, according to the connection structure of the present embodiment, the burring formed in the entrance through-hole by the entrance-exit through-hole of the receiver tank 2 and the entrance-exit communication hole of the header pipe 6 without using a separate connection member. Can be connected as a connecting member, thereby reducing the number of parts and reducing the manufacturing cost.

Further, in this embodiment, the structure in which the receiver tank having the double tube structure is connected to the heat exchanger is described. It is possible to use the connection structure of the present invention.

[0053]

As described above, according to the first aspect of the present invention, a pair of header pipes in which fins are interposed between a plurality of stacked tubes and the ends of the tubes are joined. And a heat exchanger connecting the receiver tank that stores the liquid refrigerant therein, wherein the header pipe of the heat exchanger allows the heat exchange medium inside the header pipe to flow in and out. Two communication holes are formed, and the receiver tank is formed with two through holes for flowing a heat exchange medium into and out of the receiver tank at positions corresponding to the two communication holes of the header pipe, respectively. Each communication hole and each corresponding through hole of the receiver tank are connected by a connecting member,
The connection member has a predetermined length, the inside is formed in a hollow shape, and both ends are formed with a step portion that engages with each of the communication holes and each through hole, and further, the heat exchanger, the receiver tank And a connection structure of the heat exchanger in which the connection member is connected by integral brazing.

As described above, the entrance and exit communication holes formed in the header pipe correspond to the entrance and exit through holes formed in the receiver tank, and the communication holes and the through holes are formed at both ends of the connection member having a predetermined shape. The header tank and the receiver tank are connected by engaging the stepped portion, so that the receiver tank can be connected at an arbitrary angle to the center of the header pipe, without reducing the frontal area of the heat exchanger. To
The heat exchange performance can be maintained, and the degree of freedom of attachment to the vehicle body can be improved.

According to a second aspect of the present invention, in the connection structure for a heat exchanger according to the first aspect, the step formed at both ends of the connection member is formed at one end of the connection member. The bearing surface of the stepped portion is formed in a concave shape corresponding to the outer peripheral curved shape of the header pipe, and the seating surface of the step formed at the other end of the connection member has a concave surface corresponding to the outer peripheral curved shape of the receiver tank. The protrusions of each step formed at both ends of the connection member are fitted into each communication hole of the header pipe and each through hole of the receiver tank, and each seat surface of each step is connected to the header pipe. And a connection structure of a heat exchanger configured to be in contact with the receiver tank.

As described above, when each seat surface of the step formed at both ends of the connection member is formed in a concave shape corresponding to the curved shape of the header pipe and the receiver tank, the projection of each step is formed. When the header pipe and the receiver tank are connected by being engaged with the respective communication holes of the header pipe and the respective through holes of the receiver tank, the seating surface of each step portion closely contacts the outer peripheral curved surface of the header pipe and the outer peripheral curved surface of the receiver tank. Since it is brazed, the brazing strength can be improved.

According to a third aspect of the present invention, in the connection structure for a heat exchanger according to the first aspect, the protrusions of the step formed at both ends of the connection member project in the outer peripheral direction. , A connection structure of a heat exchanger having a configuration in which a retaining portion for locking a connection member inside a header pipe and a receiver tank is formed.

As described above, if the retaining portion is formed at the projecting portion of the step portion of the connecting member which engages with each communication hole of the header pipe and each through hole of the receiver tank, the header pipe and the receiver tank can be formed. It is possible to prevent inclination and detachment of the temporarily fixed connection member, improve assemblability, and secure brazing strength.

According to a fourth aspect of the present invention, in the heat exchanger connection structure according to the first aspect, the connection structure includes a burring projecting outward from the receiver tank through each through hole of the receiver tank. Is formed, the burring is fitted into each communication hole of the header pipe, and the heat exchanger and the receiver tank are joined together by integral brazing.

As described above, the burring formed in each through hole of the receiver tank is inserted into the communication hole of the header pipe, and the heat exchanger and the receiver tank are connected. They can be connected, and the number of components can be reduced without using other members, and the manufacturing cost can be reduced.

As described above, according to the present invention, the heat exchanger and the receiver tank can be connected at an arbitrary angle, the total surface area can be reduced, and the degree of freedom in mounting the vehicle can be improved. The connection structure of the vessel can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a structure in which a header pipe and a receiver tank are connected by a connection member according to a specific example of the present invention.

FIG. 3 is a longitudinal sectional view showing a structure in which a header pipe and a receiver tank are connected by a connection member according to a specific example of the present invention.

FIG. 4 is a plan view showing a structure in which a header pipe and a receiver tank are connected by a connection member according to a specific example of the present invention.

FIG. 5 is a perspective view of a connection member according to a specific example of the present invention.

FIG. 6 is a plan view showing a structure in which a header pipe and a receiver tank are connected by a connection member according to another specific example of the present invention.

FIG. 7 is a plan view showing a state where a header pipe and a receiver tank are connected via a union according to a specific example of the present invention.

FIG. 8 is a partial longitudinal sectional view showing a structure in which an outlet communication hole of a header pipe and an inlet through hole of a receiver tank are connected by burring according to a specific example of the present invention.

FIG. 9 is a plan view showing a heat exchanger and a receiver tank according to a conventional example.

FIG. 10 is a side view showing a receiver tank connected to a header pipe via a mounting bracket having a long groove that draws an arc according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Receiver tank 4 Flat tube 5 Fin 6 Header pipe 7 Header pipe 8 Tube insertion hole 9 Side plate 10 Cap 11 Partition plate 12 Inlet joint 13 Outlet joint 14 Outlet communication hole 15 Inlet communication hole 16 Inner tube 17 Outer tube Reference Signs List 18 bulging portion 20 plug 21 fusible plug 22 filter member 23 bag 24 inlet through hole 24a burring 25 outlet through hole 26 connecting member 26A step 26B step 26a protrusion 26b protrusion 26c seat surface 26e seat surface 27 connection member 28 Connection Member 28A Step 28B Step 28a Projection 28b Projection 28c Seat 28d Seat 28e Retaining part 28f Retaining part 29 Union 29A Joining part 29B Tube part 30 Receiver tank 31 Bracket 32 Union 33 Bracket 34 Long groove Part 35 pin α angle

Claims (4)

[Claims] 1. A heat exchanger in which fins are interposed between a plurality of stacked tubes, and a pair of header pipes having ends of the tubes are joined, and a receiver tank for storing a liquid refrigerant therein. The header pipe of the heat exchanger is formed with two communication holes through which the heat exchange medium in the header pipe flows in and out, and the receiver tank is provided with the header pipe. At two positions corresponding to the two communication holes respectively, two through holes for flowing the heat exchange medium into and out of the receiver tank are formed. Each communication hole of the header pipe and the corresponding through hole of the receiver tank are Each is connected by a connecting member, the connecting member has a predetermined length, the inside is formed in a hollow shape, and both ends are formed with step portions that engage with the communication holes and the through holes, In the heat exchanger, a receiver tank and the connecting member,
A connection structure for a heat exchanger, which is joined by integral brazing. 2. The step formed at both ends of the connection member, wherein the seat surface of the step formed at one end of the connection member is formed in a concave shape corresponding to the outer peripheral curved shape of the header pipe, The bearing surface of the step formed at the other end of the connection member is formed in a concave shape corresponding to the outer peripheral curved shape of the receiver tank, and the projection of each step formed at both ends of the connection member is formed of the header pipe. The connection structure for a heat exchanger according to claim 1, wherein each connection hole and each through hole of the receiver tank are fitted, and each seat surface of each of the steps abuts on the header pipe and the receiver tank. 3. A step portion formed at both ends of the connection member is formed with a retaining portion projecting in an outer peripheral direction and locking the connection member inside the header pipe and the receiver tank. The connection structure for a heat exchanger according to claim 1, wherein: 4. In the connection structure, a burring is formed in each through hole of the receiver tank so as to protrude outward from the receiver tank, and the burring is fitted into each communication hole of the header pipe. The connection structure of a heat exchanger according to claim 1, wherein the receiver tank and the receiver tank are joined by integral brazing.