CN200993541Y

CN200993541Y - Copper-aluminium welded combined heat exchanger pipe fitting

Info

Publication number: CN200993541Y
Application number: CN 200620161462
Authority: CN
Inventors: 唐威力
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-22
Filing date: 2006-12-22
Publication date: 2007-12-19
Anticipated expiration: 2016-12-22

Abstract

The utility model discloses an welded aluminum tube and copper tube assembly, in particular to a combined heat exchanger tube assembly welded with copper and aluminum tubes, which can be used in air conditioning and cooling systems. The combined heat exchanger tube assembly welded with copper and aluminum tubes comprises copper tubes and aluminum tubes in identical inner diameter; wherein, the terminal interface of each aluminum tube is an adapter formed by expansion and socket jointing to the copper tube; the joints on the copper tubes and aluminum tubes have welded faces, which are solder welded faces. In the utility model, the copper tubes are replaced with aluminum tubes, and copper fittings are solder welded on both ends of the pipeline. The utility model can be directly used in production and thereby can greatly reduce production cost of the products and improve production efficiency; the utility model can be widely used in production of a variety of refrigerating equipment and air conditioners.

Description

Copper and aluminium welding connects the combined heat exchanger pipe fitting

(1) technical field under

The utility model relates to the solder bond body of a kind of aluminum pipe, copper pipe, and particularly a kind of air-conditioning refrigeration system connects the combined heat exchanger pipe fitting with copper and aluminium welding.

(2) background technology

Cold-producing medium is the working media that carries out kind of refrigeration cycle in refrigeration plant, and in the refrigeration system of cold-producing medium as working media, refrigeration is relevant with the capacity of cold-producing medium, crosses to exceed to hang down all can not reach best refrigeration.Obviously, the cold-producing medium in the running in the system reduces, and refrigeration will obviously be affected.If on the tubing or pad place has the air-tightness defective will cause the cold-producing medium seepage, this defective is impossible self-healing, even cause small leakage finally all can cause refrigeration plant not freeze because of cold-producing medium reduces, can only remedy by the mode of maintenance, for this product of user is exactly defective work, so guarantee that the air-tightness of pipeline pad is vital.

Prior art adopts copper pipe to insert the mode of copper pipe soldering welding in the production of refrigeration plant condenser, evaporimeter and refrigeration system connecting line, although still can obtain the high pipe joint structure of air tightness, but because copper pipe selling at exorbitant prices and the production cost and the sales price of refrigeration plant finished product caused significant impact, make product price higher, it is limited to market; In addition in the production of products such as air-conditioning or refrigeration plant evaporimeter and condenser, also there are comparatively numerous and diverse modes such as adopting pressure welding or resistance welded to carry out that copper and aluminium welding connects, but owing to can't adopt the mode of pressure welding or resistance welded that product is directly welded due to the product shape structure, thereby influenced copper-aluminium combined application.

(3) summary of the invention

The utility model is in order to remedy the deficiencies in the prior art, provide a kind of copper and aluminium welding to connect the combined heat exchanger pipe fitting, to increase the use amount that the aluminum pipe usage rate reduces copper pipe, and by improving joint design, to reach the purpose that under the preceding topic that guarantees welding quality, reduces production costs and enhance productivity.

The utility model is achieved by the following technical solution:

A kind of copper and aluminium welding connects the combined heat exchanger pipe fitting, comprises the identical copper pipe of internal diameter, aluminum pipe, and its special character is: the described aluminum pipe end interface place joint that to be aluminum pipe peg graft and form through enlarging and copper pipe; Copper pipe, aluminum pipe junction surface are solder side.

Copper and aluminium welding of the present utility model connects the combined heat exchanger pipe fitting, and described solder side is the soldering solder side.

The utility model adopts aluminum pipe to substitute copper pipe in the production of refrigeration plant condenser, evaporimeter and connecting line, adds the bit copper joint to satisfy the requirement of subsequent technique to structure at the two ends on aluminum pipe road with brazing mode.The copper aluminum pipe welded joint place of copper-aluminium combined pipeline, for becoming the welding of welding junction copper pipe after enlarging, aluminum pipe penetrates this interface, form copper pipe at interior, aluminum pipe welding point outside, utilize the surface tension principle to carry out soldering, bigger solder side be can obtain like this, joint air-tightness and weld strength improved.Wherein give suitable welding preset clearance between copper pipe external diameter and aluminum pipe interface internal diameter, joint area copper pipe internal diameter is constant, approaching with the aluminum pipe internal diameter size, keep two pipe flow areas approaching or equal, can not cause that like this refrigerant flow changes because of the variation of pipeline internal diameter.Above-mentioned welding point can adopt ripe gas welding soldering tech to obtain.This novel joint design and technology are effective, have guaranteed the welding quality and the following process structural requirement thereof of product, can be used for air-tightness is required refrigeration plant product and refrigeration pipe high and that flow and internal diameter are had specific (special) requirements.

The utility model substitutes copper pipe and welds copper sleeve with brazing mode at the two ends of pipeline with aluminum pipe, can directly apply in the production, thereby greatly reduce production cost of products, has improved production efficiency; Can be widely used in the product manufacturing of various refrigeration plants and air-conditioner.

(4) description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Accompanying drawing is a structural representation of the present utility model.

Among the figure, 1 copper pipe, 2 aluminum pipes, 3 joints, 4 solders side.

(5) specific embodiment

Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises copper pipe 1, aluminum pipe 2, the aluminum pipe 2 end interface places joint 3 that to be aluminum pipe 2 peg graft and form through enlarging and copper pipe 1; Copper pipe 1, aluminum pipe 2 junction surfaces are soldering solder side 4.

As shown in the figure, one section copper pipe 1 of welding in an end of aluminum pipe 2 or in the two ends; Aluminum pipe 2 end interface places are through enlarging machine-shaping, and the internal diameter Φ 5 of aluminum pipe 2 interfaces and 2 of the external diameter Φ of copper pipe 1 have suitable welding preset clearance, and interface length should be fit to air-tightness and weld strength requirement.

The utility model selects for use the inside and outside footpath of the inside and outside footpath of copper pipe 1 and aluminum pipe 2 can be identical, and is also can external diameter slightly different, thereby the utility model structure has overcome the requirement for restriction of conventional method to copper aluminum pipe pipeline material wall thickness.This structure and technology make the inside diameter of welding back pipeline can basically identical, guarantee that promptly refrigerant flow is not subjected to change because of joint welding or caliber, have satisfied the requirement of subsequent technique to structure again.

Claims

1. a copper and aluminium welding connects the combined heat exchanger pipe fitting, comprises the identical copper pipe of internal diameter (1), aluminum pipe (2), it is characterized in that: described aluminum pipe (2) the end interface place joint (3) that to be aluminum pipe (2) peg graft and form through enlarging and copper pipe (1); Copper pipe (1), aluminum pipe (2) junction surface are solder side (4).

2. copper and aluminium welding according to claim 1 connects the combined heat exchanger pipe fitting, it is characterized in that: described solder side (4) is the soldering solder side.