CN2864554Y

CN2864554Y - High efficiency counter flow heat exchanger

Info

Publication number: CN2864554Y
Application number: CN 200520014084
Authority: CN
Inventors: 何勤跃; 慎马龙; 徐国平; 沈建良; 洪国民
Original assignee: 洪国民
Priority date: 2005-08-15
Filing date: 2005-08-15
Publication date: 2007-01-31
Anticipated expiration: 2015-08-15

Abstract

The utility model relates to a heat exchanger in low temperature equipment field, in particular to a high-efficiency counter-flow heat exchanger. The invention is mainly characterized in that more than two inner tubes (3) with smaller diameters are provided in an outer tube (5) with larger diameters, more than two fins (4) are arranged between the interior of outer tube (5) and the external space of the inner tube by radial direction, the two ends of the outer tube (5) are provided with end covers (2), the input and output entrance of the inner tube medium (1) and the input and output entrance of the outer tube medium(6). As the utility model uses multiple inner tubes and fins, the heat exchange area is increased greatly and heat transfer efficiency is improved. Under the conditions with equal heat load, the structure is more compact and the efficiency is higher.

Description

A kind of high performance counter current heat exchanger

Technical field

The utility model relates to the heat exchanger of Cryo Equipment technical field, more particularly is a kind of high performance counter current heat exchanger.

Background technology

In the ultralow temperature field, j-t refrigerator of the polynary low-temperature mixed working medium of the employing that grew up in recent years and interior cascade refrigeration machine, because it is simple in structure, cost is low, and thermal efficiency ratio is higher, than traditional outer cascade refrigeration facility more wide application prospect is arranged, counterflow heat exchanger is a key element in j-t refrigerator and the interior cascade refrigeration machine cooling system.Its major function be in the pipe under the higher boiling incoming flow low pressure evaporation heat absorption and the outer low boiling of pipe remove to flow between the condensation heat radiation realization heat and change.Traditional heat exchanger mainly adopts the pipe box tubular structure at present.When high-pressure medium flowed in a certain direction at interior pipe, low piezodielectric then flowed outside interior pipe along contrary direction, and low piezodielectric evaporates heat absorption outside interior pipe, and the high-pressure medium of counter-current flow is realized heat exchange at inner tubal wall, the heat release condensation in the interior pipe.Pipe box tubular type heat converter structure is simple, and manufacturability is better, but because only inner tube-surface heat exchange, heat exchange area is limited, and heat transfer efficiency is not high.If thermic load is bigger, needed pipeline is very long, has increased the difficulty of sleeve pipe technology.Simultaneously, along with the lengthening of pipeline, the size of not only waste material, and increase product.Low temperature generally all needs with extraneous heat insulation with heat exchanger, and the heat exchanger of oversized dimensions certainly will increase the cost of product.In recent years, also there is the data introduction to adopt many interior pipe pipe box tubular structures, several interior pipes of cover in the big outer tube, compare with traditional structure, the quantity of pipe on lateral cross section, increasing, improved area of dissipation on the unit length, length dimension can effectively reduce, and has reduced the size of heat exchanger to a certain extent.But the manufacturability of multitube sleeve pipe is relatively poor, and the outer tube caliber size is easy to generate distortion after increasing during brake forming.

Summary of the invention

The utility model purpose is to overcome many defectives of above-mentioned heat exchanger, and a kind of brand-new compact conformation, the low temperature high performance counter current heat exchanger that technology is simple relatively, with low cost, heat exchange efficiency is high are provided.

Embodiment of the present utility model is as follows: be with two interior pipes that above bore is less in the bigger outer tube of a bore, the arranged radially of pipe space outerpace has the fin more than two in outer tube inside reaches.Gather end cap, the import and export of interior plumber's matter and outer tube medium in addition imports and exports at the two ends of outer tube.Fin generally by thermal conductivity preferably copper or aluminum slice make, have the through hole that equates with interior pipe profile and quantity on it.The quantity of interior pipe and the number of plies of fin should be set according to the size of required heat exchange area.Outer tube shape can be circular or other shape, and decide according to outer tube shape the outer of fin, but the one side has breach.As outer tube is circular, and then fin can be made large semi-circular, and the fin breach should alternately be arranged during arrangement, and the outer tube medium can be passed through from the fin indentation, there.The utility model and other heat exchanger ratio owing to adopt multitube and fin structure, have increased considerably heat exchange area, have improved heat transfer efficiency, and under equal thermic load condition, structure is compact more.Because lengthwise dimension is short, outer tube does not need bending forming, and interior pipe-in-pipe is also more convenient.

Description of drawings

Fig. 1 is a profile schematic diagram of the present utility model.

Fig. 2 is an internal structure schematic diagram of the present utility model.

The A-A of Fig. 3 Fig. 2 is to cutaway view.

The arrow direction is the flow direction of interior pipe and outer tube medium among the figure.

The specific embodiment

In conjunction with Fig. 1 Fig. 2 Fig. 3, the utility model is imported and exported 6 by interior pipe medium import and export 1, set end cap 2, interior pipe 3, fin 4, outer tube 5, outer tube medium and is constituted.Be with 10 interior pipes 3 that above bore is less in the bigger outer tube 5 of a bore, pipe 3 space outerpace arranged radiallys have the fin more than 50 in outer tube 5 inner reaching.Gather end cap 2, the import and export 1 of interior plumber's matter and outer tube medium at the two ends of outer tube 5 in addition and import and export 6.Fin 4 generally by thermal conductivity preferably red copper or aluminum slice make, have the through hole that equates with interior pipe 3 profiles and quantity on it.The quantity of interior pipe 3 and the number of plies of fin 4 should be set according to the size of required heat exchange area.The shape of outer tube 5 can be circular or other shape, and the outer shape of fin 4 is decided according to the shape of outer tube 5, but must have breach 7 in a side.As outer tube is circular, and then fin can be made large semi-circular, and fin breach 7 should alternately be arranged during arrangement, and the outer tube medium can be flow through from fin breach 7.During set end cap 2 assembly productions, at first interior pipe 3 is penetrated in the hole of the fin 4 that has through hole according to this, fin 4 is arranged above and below by the breach direction, then two ports of pipe in all are held firm welding with set, again outer tube is gathered end cap 2 and the outer tube 5 integrally welded high performance counter current heat exchangers that promptly become.

Claims

1, a kind of high performance counter current heat exchanger, be to constitute by outer tube and interior pipe, it is characterized in that: in the bigger outer tube of a bore (5), be with two interior pipes (3) that above bore is less, the space outerpace arranged radially of pipe (3) has the fin (4) more than two in the inside of outer tube (5) reaches, and gathers end cap (2), interior pipe medium import and export (1) and outer tube medium at the two ends of outer tube (5) in addition and imports and exports (6).

2, a kind of high performance counter current heat exchanger according to claim 1, it is characterized in that said fin (4) by thermal conductivity preferably copper or aluminum slice make, have the through hole that equates with interior pipe (3) profile and quantity on it.

3, a kind of high performance counter current heat exchanger according to claim 1 and 2 is characterized in that said fin (4) has breach (7) in a side.