CN101033926B

CN101033926B - Heat exchanger

Info

Publication number: CN101033926B
Application number: CN2006101324982A
Authority: CN
Inventors: 黄晓峰; 闫志恒
Original assignee: Guangdong Kelong Electrical Appliances Co Ltd
Current assignee: Hisense Home Appliances Group Co Ltd
Priority date: 2006-12-31
Filing date: 2006-12-31
Publication date: 2010-04-14
Anticipated expiration: 2026-12-31
Also published as: CN101033926A

Abstract

The invention discloses a kind of heat exchanger which some U shaped pipes possessing two parallel straight pipe and includes some fin array disposed at certain distance along the vertical direction of the straight pipe. U shaped pipes connect each other with elbow and other connecting pieces which are made of aluminium or A-alloy material, overburden of copper is set on the outside wall. Overburden can be also set on the inside wall of elbow or other connecting pieces. Compared with existing technology, the heat exchanger making use of elbow compounded by and aluminium reduces wastage of copper and debases manufacturing cost of heat exchanger; it has a good compatibility with fluids such as refrigerant and anti-friction material; the connecting joints is welded by same kinds of metal. It is simple to weld the craft and the quality is reliable.

Description

A kind of heat exchanger

Technical field

The present invention relates to the air-conditioner technical field, be specifically related to use the manufacturing technology of air-cooled tube wing-type heat exchanger.

Background technology

At present, the condenser of a lot of air-conditioner refrigerating systems and evaporimeter use air-cooled tube wing-type heat exchanger.This heat exchanger comprise some U-shaped pipes with two straight parallel tube portions and a plurality of in this straight-tube portion upper edge its fins set of vertically arranging at certain intervals, be connected by connectors such as elbow or threeways between the U-shaped pipe.The U-shaped pipe of existing heat exchanger all uses copper pipe and copper fitting usually with connectors such as elbow that is connected the U-shaped pipe or threeways.

The price height of copper uses copper pipe and copper fitting to make the air-conditioner cost very high as the pipeline of refrigeration system.The proportion of copper is about 8.9, uses the weight of air-conditioner of copper pipe and copper fitting big, surpasses the loading limit of container easily and influences the vanning amount of air-conditioner, has increased the cost of transportation of air-conditioner.Aluminum is a light metal, and aboundresources is not only in light weight, the quality heavily fortified point, and have good ductility, electric conductivity, thermal conductivity and hear resistance, be the important foundation raw material of the national economic development.The proportion of aluminium is about 2.7, processing easily, and cost is low.Use aluminum profile extrusion aluminum pipe and alumiaum article to become the emphasis of current research as the pipeline of refrigeration system, patent " a kind of room air conditioner (200610035029.9) that uses aluminium-made refrigeration pipeline ", " a kind of package AC plant (200610037019.9) that uses aluminium-made refrigeration pipeline " have proposed to use the technical scheme of the air-conditioner of aluminium-made refrigeration pipeline respectively.But, use aluminium-made refrigeration pipeline to make difficulty and the shortcoming that also there be some technical matters in air-conditioner: 1, aluminum pipe processing difficulties, fold appears when bend pipe easily, and tubing is scrapped or reduced compressive resistance; 2, Al pipe butt welding difficulty is burnt pipeline easily or weldering occurred and leaks; 3, the copper fitting junction in aluminum pipe and the refrigeration pipe, the potential difference that exists owing to the different metal contact-making surface causes couple corrosion; 4, aluminum pipe and wherein contained impurity are relatively poor with the compatibility of cold-producing medium in the refrigeration pipe and lubricating oil, and there is potential safety hazard in long-term use.

Summary of the invention

The technical problem to be solved in the present invention is to improve at the material of heat exchanger and process technology, and the air-conditioner of a kind of technology use copper aluminium composite elbow simple, with low cost is provided.Main purpose of the present invention is to provide uses the aluminium base connector that covers copper to make the heat exchanger of air-conditioner, and the method for attachment of described U-shaped pipe when linking to each other with elbow.

Technical scheme of the present invention is: a kind of heat exchanger, comprise some U-shaped pipes with two straight parallel tube portions and a plurality of in this straight-tube portion upper edge its fins set of vertically arranging at certain intervals, be connected by elbow or other connector between the U-shaped pipe, described elbow or other connector are to be made by the aluminum or aluminum alloy material, are provided with copper capping layer at its outer wall.The inwall of described elbow or other connector also can be provided with copper capping layer.

The outer wall of described elbow or other connector and inwall form copper capping layer by technology covering coppers such as plating, hot dipping, rolling compound or solid phase are compound, and the thickness of copper capping layer is 10～100 microns.

When described U-shaped Guan Zaiyu elbow or other connector were connected, the link of U-shaped pipe was provided with a flared section, and continuous connector inserts the flared section of U-shaped pipe, connects by soldering.

Compared with prior art, the heat exchanger of use copper aluminium composite elbow provided by the present invention reduces the consumption of copper, has reduced the manufacturing cost of heat exchanger.Because it is the inside and outside wall of copper aluminium composite elbow is a copper capping layer, good with the compatibility of cold-producing medium, lubricated wet goods fluid; The junction is a metal solder of the same race, and welding procedure is simple, and reliable in quality does not need to change existing heat exchanger processing production line, does not have different metal contact-making surface potential difference and causes couple corrosion.

The present invention is further illustrated below in conjunction with the drawings and the specific embodiments:

Description of drawings

Fig. 1 is the structural representation of pipe wing heat exchanger;

Fig. 2 is copper aluminium composite elbow and U type pipe connection diagram.

The specific embodiment

As shown in Figure 1, be the structural representation of air-cooled tube wing-type heat exchanger.Heat exchanger comprise some U-shaped pipes 101 with two straight parallel tube portions and a plurality of in this straight-tube portion upper edge its fins set 102 of vertically arranging at certain intervals, each fin all has the pipe patchhole that separates at a certain distance each other, two straight parallel tube portions of U-shaped pipe are inserted through each fin and manage patchhole accordingly, are connect by being weldingly connected by elbow 103 or other connector 104 between the U-shaped pipe.

Because the needs of mounting structure and air channel design can carry out bending and molding by the heat exchanging device behind the pipe that rises.Common ground, evaporimeter is after fins set gets the appropriate location otch, carries out bending with the axle parallel with the straight-tube portion of U-shaped pipe and becomes many folding heat exchangers.Condenser is to carry out bending with the axle vertical with the straight-tube portion of U-shaped pipe to become curved row's heat exchanger, and shown in Figure 1 is the structure chart of this curved row's heat exchanger.

These U-shaped pipes with two straight-tube portions are to be made by copper pipe.The elbow 103 or other connector 104 that connect the U-shaped pipe are to be made by the aluminum or aluminum alloy material, all are provided with copper capping layer by electro-plating method at its outer wall and inwall, and the thickness of copper capping layer is 30～50 microns.

As shown in Figure 2, when U-shaped Guan Zaiyu elbow or other connector were connected, the link of U-shaped pipe 201 was provided with a flared section 202, and the elbow 203 that links to each other inserts the flared section of U-shaped pipe, connects by soldering.Weld seam 204 is weld seams that soldering forms.

The heat exchanger of the use copper aluminium composite elbow that present embodiment provided, the junction is a metal solder of the same race, welding procedure is simple, reliable in quality, avoid couple corrosion, the compatibility of pipeline and cold-producing medium, lubricating oil is good, does not need to change existing heat exchanger processing production line.Compared with prior art, this manufacturing cost of air conditioner is lower.

Claims

1. heat exchanger, comprise some U-shaped pipes with two straight-tube portions and a plurality of in this straight-tube portion upper edge its fins set of vertically arranging at certain intervals, connect by elbow between the U-shaped pipe, it is characterized in that: described elbow is to be made by the aluminum or aluminum alloy material, is provided with copper capping layer at its outer wall.

2. heat exchanger according to claim 1 is characterized in that: the inwall at described elbow also is provided with copper capping layer.

3. heat exchanger according to claim 1 and 2 is characterized in that: form copper capping layer at described elbow outer wall and inwall by plating, thermal spraying, hot dipping, rolling compound or solid phase combination process covering copper, the thickness of copper capping layer is 10～100 microns.

4. heat exchanger according to claim 3 is characterized in that: when described U-shaped Guan Zaiyu elbow connected, the link of U-shaped pipe was provided with a flared section, and continuous elbow inserts the flared section of U-shaped pipe, connects by soldering.