CN2170494Y

CN2170494Y - Efficient ammonia air cooler fin tube with steelbase tube Al fin

Info

Publication number: CN2170494Y
Application number: CN93220059U
Authority: CN
Inventors: 龙慧文; 张文科
Original assignee: Construction Research Institute Of Design Bureau Of Changjiang Water Conservancy Commission
Current assignee: Changjiang Water Resources Commission, Changjiang Institute of Survey, Planning, Design and Research
Priority date: 1993-07-27
Filing date: 1993-07-27
Publication date: 1994-06-29
Anticipated expiration: 2003-07-27

Abstract

The utility model discloses a fin tube for high efficient air coolers of ammonia. An aluminium fin (2) is sheathed on the outer side of a base tube (1), and the aluminium fin (2) is tightly fixed on the base tube (1) by a tight expansion ring (3) made of steel. The aluminum material with high heat conducting coefficient is used by the utility model to make the aluminium fin (2), the tight expansion ring (3) made of steel is used to reduce the contact heat resistance between the aluminium fin (2) and the base tube (1), and thus heat transferring efficiency is improved. The value of the heat transferring coefficient K is 30W /m <2>. K, and weight is greatly lightened. The high efficient air cooler of ammonia, which is made of the utility model, can be widely used for the concrete cooling process of water conservancy and hydropower projects, the textile industries, chemical industries, cold storage industries, air-conditioner industries, etc., and the projects which require low temperature environment.

Description

Efficient ammonia air cooler fin tube with steelbase tube Al fin

The utility model relates to a kind of finned tube of ammonia highly effective air cooler.

The ammonia aerial cooler is widely used in the industry that the concrete process for cooling of hydroelectric project and light textile, chemical industry, refrigeration, air-conditioning etc. need low temperature environment.Existing ammonia aerial cooler finned tube is generally steel parent tube overcoat steel fin, and the Coefficient K value is 13W/m ²About, efficient is low, volume is big, equipment is heavy.

The purpose of this utility model is exactly the problem that exists at the said equipment, is improved on structure, and has selected for use the high material of thermal conductivity factor to make the aluminium fin, thereby be developed into heat transfer efficiency height, little, the lightweight highly effective air cooler of volume.

Finned tube is the core of aerial cooler., consider for this reason, designed base steel pipe box aluminium fin finned tube from the aspects such as structure, processing technology and selection of finned tube.Because the thermal conductivity factor of aluminium is about 5 times of steel, proportion only is 1/3 of steel, thereby the heat transfer efficiency of this finned tube greatly improves, and its Coefficient K value reaches 30W/m ²K, and weight also greatly alleviates.For reducing the thermal contact resistance between aluminium fin and parent tube, on the structure of finned tube, increased the tight packing of steel.Its concrete structure is on parent tube 1, applies mechanically the aluminium fin 2 that aluminum material is made outward, the tighter packing 3 of steel is wrapped in turn with aluminium fin 2 and parent tube 1, with the mechanical expanding method three closely is combined into one after locating.

The utility model has the advantages that: (1) volume is little, in light weight, compares with conventional products, and it is in light weight 40% to 50%, and volume is half as large; (2) processing technology is simple and easy to do, and the tight packing of aluminium fin and steel can a drawing, and the mechanical expanding method is simple, quick, is fit to large-scale production; (3) heat transfer efficiency height, cost is low, and under equal heat exchange amount, cost is about 2/3 of conventional products.

Description of drawings:

Fig. 1 is the part schematic diagram after the utility model blocks.

Referring to Fig. 1, the utility model is simple in structure, mainly is made of parent tube 1, aluminium fin 2, the tight packing 3 of steel.

The following describes the enforcement of this utility model:

(1) make parent tube 1 with seamless steel pipe, adopt a drawing to make aluminium fin 2 and the tight packing 3 of steel with aluminium sheet and galvanized steel plain sheet again, also can distinguishing after the punching press again, row makes up;

(2) with special mould with the tight packing of aluminium fin 2 and steel 3 location after, again parent tube 1 is passed aluminium fin 2;

(3) be pulled through by force in parent tube 1 with special bloated head, parent tube 1 external diameter enlarged and force aluminium fin 2, the tight packing 3 of steel and parent tube 1 to be combined closely to be integral.

Above-mentioned finned tube can be in existing aerial cooler and various fan coil factory and the operation enforcement of metalworking producer.

Claims

1, a kind of ammonia highly effective air cooler finned tube that is made of parent tube, fin is characterized in that going up overcoat aluminium fin (2) at parent tube (1), and with the tight packing of steel (3) aluminium fin (2) is fastened on the parent tube (1).