JPH11351780A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a vibration resistant strength of a connecting site of a receiver tank by connecting the tank in a simple structure, and mounting a vehicle body of an aggregating cycle. SOLUTION: In the heat exchanger 1 comprising a receiver tank 2 for separating a gas and a liquid, and a header pipe 7 for mounting the tank 2; the tank 2 is mounted at the pipe 7 via a bracket 30 or a bracket (40), the bracket 30 has a contact part 31 of the pipe along a peripheral side face of the pipe 7, a mounting part 3 for mounting the tank 2, and a vehicle mounting part 32, and the exchanger 1, the tank 2 and a vehicle body are simultaneously mounted via the bracket 30. The bracket (40) has a mounting part protruding toward the pipe 7 direction and a mounting surface provided at the mounting part and adapted to a circumferential surface of the pipe 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger in which a receiver tank for performing gas-liquid separation is attached to a header pipe.

[0002]

2. Description of the Related Art As a heat exchange medium aggregating apparatus used in an automobile refrigeration cycle, for example, a laminated heat exchanger is known. 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 receiver tank, the heat exchange medium, which has been in a gas-liquid two-phase state due to heat exchange with the external air in the heat exchanger, is separated into gas and liquid by a dryer and a filter inside the receiver tank to form a liquid single-phase heat exchange medium. Is a device for flowing again into the heat exchanger and circulating the cooling cycle. in this way,
When the receiver tank is connected to the heat exchanger, the refrigerant in a gas-liquid two-phase state is separated into a liquid single-phase liquid refrigerant containing no gas medium, and circulates again in the refrigeration cycle.
A decrease in cooling capacity can be prevented without a decrease in 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.

Heretofore, when this type of coagulation cycle is mounted on a vehicle body, there is a problem with the mounting space in the vehicle body.
Various mounting structures for mounting the receiver tank and the heat exchanger are disclosed. For example, Japanese Patent Application Laid-Open No. 6-50615 describes a structure in which an outlet and an inlet of a liquid receiver and an outlet and an inlet of a heat exchanger are connected by a pipe.

Japanese Patent Application Laid-Open No. Hei 8-219590 discloses that a receiver tank and a heat exchanger are arranged close to each other, and a refrigerant outlet and an inlet of the heat exchanger are connected to a refrigerant outlet and an inlet of the receiver tank.
By integrating a part of the receiver tank and a part of the heat exchanger,
A structure for reducing the space is described.

In addition, Japanese Patent Application Laid-Open No. 9-159317 discloses a structure in which a heat exchanger and a receiver tank are connected via a connection block. That is, the header pipe of the heat exchanger is formed with a refrigerant inflow / outflow port,
A connector block is attached to the inflow / outflow port. The connector block is formed with a flow hole that matches the inlet / outlet of the header pipe and a bolt hole into which a bolt is fitted. In addition, a joint portion is formed separately from the connector block, and a flow hole and a bolt hole that match the flow hole are similarly formed in the joint portion. Further, a structure is shown in which the refrigerant inlet port on the receiver tank side is fitted to the circulation hole, a bolt is fitted to the bolt hole, and the header pipe and the receiver tank are connected to be able to communicate with each other.

[0007]

The connection structure of the conventional heat exchanger is, for example, as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 6-50615. The inflow port and the inflow port are connected by a pipe connecting them, and this pipe constitutes a connection member.When the coagulation cycle is mounted on the vehicle body, vibration during traveling concentrates on the pipe portion serving as the connection member. Over
There has been a problem that the connection strength of the pipe connection portion is deteriorated, which causes a medium leakage due to cracks and cracks.

Further, in the connection structure described in Japanese Patent Application Laid-Open No. 8-219590, since the header pipe of the heat exchanger and the receiver tank are integrally connected, it is difficult to braze. However, the joining position between the header pipe and the receiver tank is displaced, so that problems such as brazing and poor brazing occur.

In the connection structures disclosed in JP-A-6-50615, JP-A-8-219590 and JP-A-9-159317, in addition to the mounting member of the receiver tank, these coagulation cycles are used. It is necessary to separately mount a mounting member or the like for mounting on the vehicle body, and thus the operation becomes complicated and the mounting structure is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a heat exchanger in which a receiver tank is connected with a simple structure and, at the same time, a vehicle body can be mounted in a coagulation cycle.
Still another object of the present invention is to provide a heat exchanger in which the receiver tank is connected with a simple structure, and at the same time, the vibration proof strength of the connection portion of the receiver tank is improved.

[0011]

According to the invention described in the first aspect of the present invention, the receiver tank 2 for performing gas-liquid separation is attached to a header pipe 7 by adding the reference numerals used in the following specific examples. In the exchanger 1, the receiver tank 2
Is attached to the header pipe 7 via a bracket 30. The bracket 30 includes a header pipe contact portion 31 along the peripheral side surface of the header pipe 7, an attachment portion 35 for attaching a receiver tank, and a vehicle. Mounting part 3
2, and the heat exchanger 1, the receiver tank 2, and the mounting to the vehicle body are performed at one time by the bracket 30.

With this configuration, the mounting process is simplified, and the complexity of the operation can be reduced.

Further, since the bracket of the present invention connects the receiver tank and also serves as a member to be attached to the vehicle body, the three members can be fixed without providing a separate member. Therefore, the number of work steps is reduced, and work efficiency is reduced. Can be improved.

According to a second aspect of the present invention, in the heat exchanger according to the first aspect, a convex portion 71 for mounting and positioning the bracket 30 is formed on the header pipe 7 of the heat exchanger 1. Further, the bracket 30 is a heat exchanger having a configuration in which a positioning portion 39 corresponding to the convex portion 71 of the header pipe 7 is formed.

As described above, according to the present invention, the header pipe is formed with the positioning projection, and the bracket is formed with the positioning section such as the hole and the recess corresponding to the positioning projection. Therefore, the bracket can be mounted at a predetermined position without displacement, and as a result, the brazing property is improved.

According to the third aspect of the present invention, in the heat exchanger 1 in which the receiver tank 2 for performing gas-liquid separation is attached to the header pipe 7, the receiver tank 2 is attached to the header pipe 7 via a bracket 40. The bracket 40 is integrally formed with the receiver tank, or is separately manufactured to be fitted to the receiver tank, and has a mounting portion 44 protruding toward the header pipe 7; The heat exchanger is provided with a mounting surface 46 provided on the mounting portion 44 and adapted to the peripheral curved surface of the header pipe 7.

For example, in the lower region of the receiver tank,
When the bracket for connecting the header pipe and the receiver tank is provided as described above, the bracket reinforces the connection part between the header pipe and the receiver tank. Loads such as torsional torque can be reduced by the bracket. Further, since a connecting portion such as a pipe connecting the medium outflow port of the heat exchanger and the medium inflow port of the receiver tank can be reinforced, vibration resistance when the vehicle body is mounted can be improved.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

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

As shown in FIG. 1, in this heat exchanger 1, a plurality of tubes 4 and fins 5 are alternately laminated, and both ends of the laminated flat tubes 4, 4 are respectively connected to a header pipe 6, 7 are inserted and connected to the tube insertion holes 8, 8. 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 formed by rolling a plate of a predetermined size on which a brazing material is clad by roll molding 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, partitioning plates (not shown) are provided at required locations inside the header pipes 6 and 7.

The header pipe 7 connected to the receiver tank 2 has an outlet communication hole 14 and an inlet communication hole 15 (see FIG. 3) through which the heat exchange medium flows. The receiver tank 2 is a vertically long hermetically sealed container, and holds a filter member (not shown) and a functional component having a gas-liquid separation function such as a dryer inside the receiver tank 2.

The receiver tank 2 is manufactured by rolling a plate of a predetermined size on which a brazing material is clad by press molding or the like.

The receiver tank 2 of the present embodiment has,
A mounting portion protruding upward in the longitudinal direction is formed. The attachment portion is formed in a shape that can be fitted to a receiver tank attachment portion of a bracket described later.

In the case of the present embodiment, the mounting portion of the receiver tank is, as shown in FIG. 2, a protruding rod-shaped mounting portion that fits from the mounting base 22 to a receiver tank mounting portion 35 of a bracket 30 described later. 23 is formed as the mounting portion.

The bracket 30 attached to the header pipe 6 is formed by press-forming a brazing sheet of a predetermined shape clad with a brazing material.

The mounting bracket 30 of this embodiment has a contact portion 31 having a curvature substantially coinciding with the outer periphery of the header pipe 7 along the peripheral side surface of the header pipe 7 and extending from the contact portion 31 in the vehicle body mounting direction. And a vehicle body mounting portion 32 having a flat surface 33 protruding therefrom. This vehicle body attachment part 32
Is formed by forming a mounting hole 34 for inserting a vehicle body mounting member (not shown) in a flat surface 33 of a vehicle body mounting portion 32 protruding from the contact portion 31.

Further, a receiver tank mounting portion 35 is formed to protrude horizontally from the flat surface 33 in the direction of the receiver tank pivot position from the flat surface 33 of the vehicle body mounting portion 32. The receiver tank mounting portion 35 has a mounting surface 36 projecting horizontally from the flat surface 33, and a hole 37 for fitting the mounting portion 23 of the receiver tank 2 is formed in the mounting surface 36. Further, in order to improve the strength of the bracket 30, a reinforcing plane 3 is provided above the plane 33 at a position facing the mounting plane 36.
8 are formed.

The contact portion 31 is provided with a positioning portion 39 that matches a positioning projection 71 formed on the header pipe 7 and described later.

That is, the convex portion 71 for positioning is formed on a part of the outer peripheral side surface of the header pipe 7 by press molding or the like. Then, a hole or a concave portion that matches the convex portion 71 is formed in the contact portion 31 of the mounting bracket 30 that contacts the header pipe 7, and the convex portion 71 of the header pipe 7 is connected to the contact portion 31 of the mounting bracket 30. By fitting into the hole or the recess formed in the header pipe 7, the positioning is performed, so that the mounting bracket can be attached to a predetermined position of the header pipe 7.

As described above, according to the bracket 30 of this embodiment, the brazing sheet can be formed relatively easily by press molding or the like. Further, in the bracket of this example, after the bracket is brazed to a predetermined position of the header pipe of the heat exchanger by the positioning portion, the mounting portion of the receiver tank is fitted into the hole formed in the mounting plane. Accordingly, the receiver tank can be easily attached to the bracket.

Therefore, the bracket of the present embodiment does not require a connector block for mounting the receiver tank, bolts and the like, and does not braze the receiver tank integrally, as in the prior art. The receiver tank can be attached to the heat exchanger with a simple structure. In addition, since the bracket of this example also functions as a vehicle body mounting bracket, there is no need to provide a vehicle body mounting bracket as a separate member, reducing the number of mounting steps,
The mounting process can be simplified, and the manufacturing cost can be reduced and work efficiency can be improved.

Next, a bracket provided in a lower area of the receiver tank and reinforcing the connection between the receiver tank and the header pipe will be described.

FIG. 3 is a perspective view showing the lower portion of the receiver tank 2 provided with the bracket 40 and the header pipe 6 of the heat exchanger.

As shown in FIG. 3, the bracket 40 is formed integrally with the upper end of the step portion 51 of the lower tank portion 50 of the receiver tank 2 and the receiver tank 2 (in this example, an outer tube).
A ring surface 42 is formed on the outer periphery of the ring member 42. A mounting portion 44 having a predetermined width and projecting toward the header pipe 6 is formed from a part of the ring surface 42. The mounting portion 44 has a flat surface 45 protruding in the direction of the header pipe 6 on a part of the ring surface 42, and a tip of the flat surface 45 is bent in a vertical direction. Mounting surface 4 having a curvature that matches
6 are formed.

Accordingly, after the lower tank 50 having the bracket 40 is attached to the outer pipe of the receiver tank 2, the inlet 24 and the outlet 25 of the receiver tank 2 and the inlet / outlet communication holes formed in the header pipe 6 are formed. By connecting the pipes 14 and 15 via the pipes 26 and 27, the receiver tank 2 and the header pipe 6 are connected to be able to communicate with each other while securing a coolant flow path. In addition, protrusions 26a and 27a, which are inserted into the entrance and exit communication holes 14 and 15 of the header pipe 6 and have a medium flow path formed therein, are formed at the distal ends of the pipes 26 and 27.

The mounting surface 46 of the bracket 40 abuts along the outer periphery of the header pipe 6.

Accordingly, the header pipe 6 and the receiver tank 2 of the heat exchanger 1 are located in the lower portion in the longitudinal direction.
They are connected by pipes 26 and 27 and a bracket 40.

With this bracket 40, when the coagulation cycle is mounted on the vehicle body, it becomes possible to reinforce the load due to vibration or the like during running with the bracket 40. For this reason, it is possible to prevent the medium from leaking due to a crack or a crack at the connection portion due to a load or the like due to vibration during traveling, and to improve the coagulation function.

Further, when replacing the gas-liquid separation functional component provided inside the receiver tank 2, a load due to the torsion torque generated at the time of replacement is applied to the pipes 26 and 27 connecting the header pipe 6 and the receiver tank 2. In addition, since it can be reinforced by the bracket 40, the durability of the coagulation cycle can be improved.

Further, when the bracket is assembled at a predetermined position, a projection protruding outward is provided on the peripheral surface of the receiver tank, so that the projection serves as a positioning portion, and the bracket is assembled at a predetermined position of the receiver tank. Becomes possible.

In addition, as shown in FIG. 4, a stepped portion 51 into which an outer tube is fitted is provided at the lower opening of the receiver tank 2.
When a lower tank (joint member) 50 having a step 52 having a smaller diameter than the step 51 is provided, the first step 51 of the lower tank 50 is connected to the receiver tank 2. It is formed larger than the outer circumference of the outer tube.
In addition, the structure in which the contact surface 41 of the bracket 40 separate from the lower tank portion 50 is fitted,
0 can be attached to a predetermined portion of the receiver tank 2. In this case, the contact surface 41 of the bracket and the ring surface 4
2 is supported by the lower tank portion 50, so that the bracket 40 can be assembled to the receiver tank 2 without shifting or coming off.

Accordingly, the mounting surface 46 of the bracket 40 is brought into contact with the peripheral side surface of the header pipe 6 in the lower region of the receiver tank 2, and the mounting bracket 30 is attached to the mounting bracket 30 in the upper region of the receiver tank 2. By fitting the mounting portion 23 of the heat exchanger 1
It is possible to stably hold the receiver tank 2 on the header pipe 6 and improve the anti-vibration strength.

As described above, the mounting bracket 30 or the bracket 40 can be easily formed by press molding.

When the mounting bracket 30 and the bracket 40 for improving the connection strength in the lower region of the receiver tank 2 are mounted, the receiver tank 2 can be easily mounted without directly brazing to the heat exchanger. be able to. Therefore, the mounting process is simplified, and the complexity of the operation can be reduced.

Further, when both the mounting bracket 30 and the bracket 40 are used, the header pipe and the receiver tank can be firmly joined not only in the upper region of the receiver tank but also in the lower region of the receiver tank. The anti-vibration strength is improved, and it can be prevented from coming off or shifting.

Further, the gas-liquid separating member held in the receiver tank can be easily replaced, and the load generated at the connection portion by the torsion torque or the like generated at the time of replacement can be reduced by the bracket, and the durability of the coagulation cycle can be improved. Can be improved.

Further, since the connection strength can be improved by the bracket, the reliability of the coagulation cycle is improved.

[0048]

As described above, according to the first aspect of the present invention, the receiver tank 2 for performing gas-liquid separation is provided with a header pipe 7
In the heat exchanger 1 attached to the header pipe, the receiver tank 2 is attached to the header pipe 7 via a bracket 30, and the bracket 30 is provided at a contact portion of the header pipe along the peripheral side surface of the header pipe 7. 31 and
The heat exchanger has a mounting portion 35 for mounting the receiver tank and a vehicle mounting portion 32, and the bracket 30 allows the mounting to the heat exchanger 1, the receiver tank 2, and the vehicle body at one time.

With this configuration, the mounting operation process is simplified, and the complexity of the operation can be reduced.

Further, since the bracket of the present invention connects the receiver tank and also serves as a member for attaching to the vehicle body, the three members can be fixed without providing a separate member. Therefore, the number of working steps is reduced, and the working efficiency is reduced. Can be improved.

According to a second aspect of the present invention, in the heat exchanger according to the first aspect, a convex portion 71 for mounting and positioning the bracket 30 is formed on the header pipe 7 of the heat exchanger 1. Further, the bracket 30 is a heat exchanger having a configuration in which a positioning portion 39 corresponding to the convex portion 71 of the header pipe 7 is formed.

As described above, according to the present invention, the positioning protrusion is formed on the header pipe, and the bracket is formed with the positioning portion such as the hole and the recess corresponding to the positioning protrusion. Therefore, the bracket can be mounted at a predetermined position without displacement, and as a result, the brazing property is improved.

According to a third aspect of the present invention, in the heat exchanger 1 in which the receiver tank 2 for performing gas-liquid separation is attached to the header pipe 7, the receiver tank 2 is connected to the header pipe 7 via a bracket 40. The bracket 40 is integrally formed with the receiver tank, or is separately manufactured to be fitted to the receiver tank, and has a mounting portion 44 protruding toward the header pipe 7; The heat exchanger is provided with a mounting surface 46 provided on the mounting portion 44 and adapted to the peripheral curved surface of the header pipe 7.

For example, in the lower region of the receiver tank,
When the bracket for connecting the header pipe and the receiver tank is provided as described above, the bracket reinforces the connection part between the header pipe and the receiver tank. Loads such as torsional torque can be reduced by the bracket. Further, since a connecting portion such as a pipe connecting the medium outflow port of the heat exchanger and the medium inflow port of the receiver tank can be reinforced, vibration resistance when the vehicle body is mounted can be improved.

[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 perspective view showing a heat exchanger, a part of a receiver tank, and a mounting bracket according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a header pipe, a part of a receiver tank, and a bracket according to a specific example of the present invention.

FIG. 4 is a sectional view of a receiver tank provided with a joint member and a bracket according to a specific example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Receiver tank 4 Tube 5 Fin 6 Header pipe 7 Header pipe 8 Tube insertion hole 9 Side plate 10 Cap 12 Inlet joint 13 Outlet joint 14 Outlet communication hole 15 Inlet communication hole 24 Inlet part 25 Outlet part 26 Pipe 26a Projection Part 27 Connection member 27a Projection part 30 Mounting bracket 31 Abutment part 32 Body mounting part 33 Body mounting plane 34 Body mounting hole 35 Receiver tank mounting part 36 Mounting plane 37 Mounting hole 38 Reinforcement plane 39 Positioning part 40 Bracket 41 Contact surface 42 Ring surface 44 Mounting part 45 Flat surface 46 Mounting surface 50 Lower tank part (joint member) 51 Step part 52 Step part 71 Convex part

Claims (3)

[Claims] 1. A heat exchanger in which a receiver tank for performing gas-liquid separation is attached to a header pipe, wherein the receiver tank is attached to the header pipe via a bracket, and the bracket is provided around the header pipe. It has a contact part of the header pipe along the side surface, a mounting part for mounting the receiver tank, and a vehicle mounting part. By this bracket, mounting to the heat exchanger, the receiver tank and the vehicle body is performed at once. Heat exchanger. 2. The header pipe of the heat exchanger is formed with a convex portion for mounting and positioning a bracket, and the bracket is formed with a positioning portion corresponding to the convex portion of the header pipe. The heat exchanger according to claim 1, wherein: 3. A heat exchanger in which a receiver tank for performing gas-liquid separation is attached to a header pipe, wherein the receiver tank is attached to the header pipe via a bracket, wherein the bracket is integrated with the receiver tank. A mounting part formed or fitted separately to the receiver tank, the mounting part protruding toward the header pipe direction, and a mounting surface provided on the mounting part and adapted to the peripheral curved surface of the header pipe. A heat exchanger comprising: