KR200417350Y1 - Connector for liquid receiver - Google Patents

Abstract

The present invention is a separate type for brazing joint between the condenser header pipe and the receiver tank in the receiver tank brazed together with the air conditioner condenser to support the inlet passage pipe of the refrigerant to the receiver tank and the receiver tank as a support for the condenser. It relates to the structure of a connector, that is, a connector, which consists only of hollow pipes clad with cladding, so that the connector can be integrally formed to perform the above functions. There is.

Connector, connector, receiver tank, condenser

Description

Receiver Connector {CONNECTOR FOR LIQUID RECEIVER}

1 is an exemplary view showing an air conditioner condenser of a vehicle

Figure 2 is a conventional connector configuration

Figure 3 is another conventional connector configuration

Figure 4 is a hollow pipe coated with the present invention clad and cross-sectional view

Figure 5 is a constant wall thickness connector in the both ends insert seated connector

Figure 6 is an increased pipe wall thickness connector in the end-insertion-mounted connector of the present invention

Figure 7 is a double-end expansion seated connector of the present invention

8 is a connector combining the present invention FIGS. 5 and 7

9 is a cross-sectional view showing a state of use of the subject innovation

10 is a perspective view showing a state of use of the subject innovation

<Code Description of Main Parts of Drawing>

20: body 21: unbonded pipe

40: hollow pipe 41: base material

42: clad 43: cutting

50: large outer diameter 51: small outer diameter

52: step 53: seating surface

54: expansion coupling 55: caulking coupling

56: TIG Welding 57: Former

58: press punch 59: mold

60: expansion 61: inner seating surface

62: inner diameter expansion punch 80: receiver tank

81: header pipe 82: filter cap

83: O-ring 84: desiccant

t1: similar pipe wall thickness

t2: increased wall thickness

The connector of the present invention is manufactured only with a hollow pipe coated with clad, so as to be an integrated structure to perform the connector function, which improves the reliability of the product, makes production easier, mold cost, and material cost. Is there.

Generally, a condenser for an air conditioner of an automobile includes a pair of header pipes 81a and 81b arranged side by side as shown in FIG. 1, a plurality of tubes 3 connecting between the header pipes, After the cooling fins 4 are filled in between, the baffles 1c provided inside the header pipe guide the flow path of the refrigerant along the tubes 3 to flow along the side of the header pipe. It is provided with a receiver tank 80 in the inlet to the receiver tank through the refrigerant inlet passage pipe 11, and then through the refrigerant outlet passage pipe 12, only the liquid refrigerant is sent to the subcooling zone of the lower region of the condenser It is designed to increase the cooling efficiency.

The refrigerant inflow passage 11 and the outlet passage 12 to the receiver tank are called connectors, and in addition to acting as the inlet and outlet passages of the refrigerant, they are brazed to the condenser and the receiver tank to attach the receiver tank to the condenser. Serve as a support

The lower end of the receiver tank assembles the cap after brazing. The filter cap is a rubber O-ring to prevent leakage of the refrigerant, and at the same time, the filter cap is provided with a mesh mesh to filter mixed foreign matter in the refrigerant.

The structure of the detachable representative connector separated from the conventional receiver tank is as follows.

Figure 2 is a circular end that is not joined by cutting and continuous press bending molding of the aluminum body 20 and the base plate made of a forging method with a communication hole in the conventional connector and the aluminum clad coated with a low melting point on the base material Meaning It is a structure completed by molding into a joining pipe 21 and inserting it into the communication hole of the body 20.

The reason for using aluminum 40 series cladding (low filler material) with lower melting point than base metal is that the cladding treatment is not applied to the receiver tank. Generally, the clad melts during furnace brazing and serves as a solvent agent to join the receiver tank. to be.

In this structure, the connector is completed through the forging process of forming the body 20, the press forming process of forming the clad coated plate into the round unbonded pipe 21, and the assembling process combining the body and the pipe, thus forming and assembling the connector. Since cladding is applied only to the knee joining pipe 21, which is cumbersome to process, the cladding acting as a solvent may be insufficient, so that the weld strength is weak and the joint is broken by external conditions such as vehicle vibration after brazing, which may cause leakage of refrigerant. .

Another conventional connector structure as shown in FIG. 3 is formed by molding a clad aluminum plate by a continuous press process and assembled between the condenser header pipe 81a and the receiver tank 80 and temporarily joined by TIG welding. There is a structure to braze together in the furnace.

This method also has to go through a multi-step molding process during press molding, which is expensive because of the high cost of press mold and the loss of material discarded during press work.

The present invention is to solve and solve the above-mentioned conventional problems, the main purpose of the invention is to manufacture a connector only with a hollow pipe coated with a clad material to perform a sufficient connector function during brazing welding product reliability and productivity The purpose is to further improve the production cost and to further reduce the manufacturing cost by reducing the mold cost and material cost.

A characteristic constitution of the present invention for achieving the above object is a connector brazed together with a condenser to serve as a refrigerant inlet and outlet of a receiver tank, wherein both ends of the connector have a predetermined section extending from a shaft or a central section. On the boundary of the small outer diameter section inserted into the hole formed in the receiver tank and the condenser header pipe, which are the assembled assemblies, which are assembled with the large outer diameter section, the stepped surface and the stepped surface are formed to be seated with the outer surface of the relative assembly. In a structure in which the insertion length is controlled and the brazing joint surface is extended to the counterpart assembly, the hollow pipe coated with 40 series aluminum clads is formed as a single body so that no separate solvent is required.

In addition, in a connector brazed together with a condenser to serve as a refrigerant inlet pipe and a support of the receiver tank, the connector uses an aluminum clad-coated hollow pipe to expand the inner diameter section at both ends, wherein the enlarged inner surface is The use of 40 series aluminum clad-coated hollow pipes prevents the need for any additional solvent in the structure that the welding joint surface is extended by forming a seating surface to be seated with the outer surface of the receiver tank and the condenser header pipe, which are the opposite assemblies. To form into the body.

In addition, in the connector brazing together with the condenser to serve as the refrigerant inlet and outlet of the receiver tank, the connector is manufactured using a hollow pipe coated with aluminum clad, but one end is expanded to form a seating surface , The other end is formed in one body without the need for a separate solvent so that the seating surface is formed by the condensation.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

First, the present invention uses only the hollow pipe 40 coated with the 40 series cladding of the aluminum material described above, as shown in FIG. 4, in the condenser, the coolant inlet passage pipe 11 and the outlet passage pipe 11 of the receiver tank 80 ( 12) It provides a configuration consisting of a role and a connector which is brazed to the condenser and the receiver tank to serve as a support for attaching the receiver tank to the condenser.

In the clad coated hollow pipe 40, the base material 41 made of aluminum does not melt because the melting point is higher than the ambient temperature in the furnace during brazing, and the clad material 42 coated on the surface of the base material has aluminum having a lower melting point than the ambient temperature. As a 40 series, it acts as a solubilizer for melting and brazing.

The cladding surface of the hollow pipe 40 coated with aluminum clad on the mother material is selected according to the joining part which requires brazing among the inner surface, the outer surface or the double side of the hollow pipe, and the outer diameter of the pipe is Φ6 to Φ18mm, and the thickness is 1.0 to 1.5mm, cladding ratio of 8-15% is suitable for the thickness of the base material. First, the hollow pipe 40 clad is cut to the required length.

FIG. 5 is a shape of a connector 500 inserted into a receiver tank 80 and a condenser header pipe 81 having a hole communicating with both ends of a connector in the present invention.

The manufacturing method is a method of ducting both end sections after the cutting 43, as shown in Figure 4 the clad coated hollow pipe of the large outer diameter 50 dimensions and the hollow pipe coated with the cladding of the small outer diameter 51 ( There is a method of expanding the center section after the cutting 43 using 40).

First, the method of forming by the shaft tube requires a hollow pipe 40 coated with a cladding of an outer diameter 50 larger than a hole formed in the counterpart to be inserted, that is, the receiver tank 80 and the condenser header pipe 81. After cutting 43 to length, a fixed section of a large outer diameter 50 is fixed using a jig, and a predetermined section of one step or both ends is sequentially formed by a former 57 or a press punch 58, and the conduit Since the external diameter dimension has to be inserted into the counterpart hole, it is molded into an external diameter 51 smaller than the counterpart hole in communication.

Between the outer diameter 50 and the smaller outer diameter 51 that is larger than the hole inserted into the counterpart after the tube forming, a step 52 is naturally formed in both parts. Suitable jigs and molds are used to make the seating surface 53 so as to rest on the outer surface of the tank 80 and the condenser header pipe 81.

The molded step 51 controls the length that the connector is inserted into the counterpart, and the seating surface 53 is in contact with the counterpart stably while being seated, and at the same time, the welding surface is increased during brazing, thereby improving welding strength. Since the cladding may be insufficient when the tube is cut, the amount of filler material in the brazing part may be insufficient. Since the entire surface of the hollow pipe 40 coated with the clad used is clad, the filler is melted together during brazing to form a sufficient amount of filler and beads. The concern is resolved.

Secondly, the expansion method requires a hollow pipe 40 clad with an outer surface or both sides of a small outer diameter 51 that can be inserted into a hole formed in the receiver tank 80 and the condenser header pipe 81. After cutting (43) to the length, put into the frame (59) formed with a larger aperture than the counterpart hole to be inserted, hold the both ends of the pipe and press the force in the direction toward the center to expand the center of the pipe in the frame There is a way to make a large diameter 50 section.

The step 52 is also formed at this time, using a suitable jigs and molds to make the seating surface 53 to be molded. The pipe wall thickness of the large diameter after the shaft pipe or expansion pipe can be formed into a pipe wall thickness t1 similar to the thickness of the hollow pipe used, and the shape thereof is the present invention.

6 is an increased pipe wall thickness (t2) connector shape in which the pipe wall thickness of the large outer diameter section is increased to the inner diameter of the small outer diameter section by further pushing the force at expansion.

After inserting the connector, which is a body formed only of the hollow pipe 40 coated with the cladding, into the receiver tank and the condenser header holes, the connector end is expanded to the mating hole 54 or to the mating hole contact surface at the connector inner diameter. 55) Or fix it with partial TIG welding (56) and braze with condenser.

7 is a connector of another structure of the present invention.

After cutting the hollow pipe 40 clad on both sides or the inner surface to the required length, the inner diameter of both ends is expanded using an inner diameter expansion punch 62.

The expanded inner surface shape allows the receiving surface 61 to be seated on the outer surface of the receiver tank 80 and the condenser header pipe 81. The joining surface between the counterparts widened by the expanded seating surface increases the brazing welding strength, thereby improving durability.

The connector with the inner sections of both ends formed with only the hollow pipe 40 coated with aluminum cladding is installed between the receiver tank 80 and the condenser header pipe 81 and temporarily assembled by TIG welding or other coupling method. After being brazed in the furnace together with the other parts of the condenser it serves as a refrigerant passage tube and the receiver tank support to the receiver tank (80).

FIG. 8 is a connector structure using only the hollow pipe 40 coated with aluminum clad, which uses both the present inventions FIGS. 5 and 7, that is, an insertion type and an expansion tube seating type at each end.

This can free the end end shape depending on the assembly partner shape and the workpiece.

9 and 10 are examples of a configuration in which the connector structure of the present invention is brazed together with a condenser and a filter cap 82, an O-ring 83, and a desiccant 84 are assembled in a receiver tank.

Shapes of the present invention can be freely the end shape and the installation position according to the purpose and convenience.

As described in detail above, the connector of the present invention has a structure formed of only a hollow pipe 40 coated with aluminum clad, which is mass-produced, as in the conventional structure. Saving is economical.

In another conventional method, the molding step is not complicated, which saves mold cost and minimizes material loss, and minimizes investment costs even for products having different dimensions of the condenser header pipe 81 and the receiver tank 80. There is an advantage that can be manufactured flexibly.

In addition, since the brazing welding surface can be raised and the cladding to be supplemented is sufficient, the welding strength is improved and the durability is improved.

Furthermore, when the condenser header pipe 81 is made of a material that is not clad, it is more effective because the connector of the structure and shape of the design made by using the clad coated pipe 40 is placed where it is in contact with the header. .

Claims (3)

A connector brazed with a condenser to serve as a refrigerant inlet and a support of a receiver tank, A small outer diameter inserted into a hole formed in the receiver tank 80 and the condenser header pipe 81, which is a relative assembly assembled with a large outer diameter 50 section by expanding a predetermined section of both ends of the connector through a shaft tube or a central section ( 51) At the boundary of the section, the step 52 and the step surface are formed so that the mounting surface 53 can be seated with the outer surface of the counterpart assembly. The connector of the receiver, characterized in that formed using a hollow pipe 40 coated with aluminum clad as a body without a separate solvent. A connector brazed with a condenser to serve as a refrigerant inlet and a support of a receiver tank, The connector uses a hollow pipe 40 coated with aluminum cladding to expand the inner diameter section at both ends, and the enlarged inner surface is to be seated with the outer surface of the receiver tank 80 and the condenser header pipe 81 which are relative assemblies. Sap, characterized in that formed by one body without the need for a separate solvent using the hollow pipe 40 coated with 40 series aluminum clad in the structure to form a seating surface 61 so that the welding joint surface Connector. A connector brazed with a condenser to serve as a refrigerant inlet and a support of a receiver tank, The connector is manufactured using a hollow pipe 40 coated with aluminum clad, one end of which is expanded so that the seating surface 61 is formed, and the other end of the connector is condensed so that the seating surface 53 is formed. The receiver connector, characterized in that it is formed of a single body without the need for me.

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