CN201218675Y

CN201218675Y - Aluminum coaxial heat exchanger

Info

Publication number: CN201218675Y
Application number: CNU2008200871888U
Authority: CN
Inventors: 方真健; 蒋志武
Original assignee: Extek Energy Equipment Zhejiang Ltd
Current assignee: Extek Energy Equipment Zhejiang Ltd
Priority date: 2008-05-23
Filing date: 2008-05-23
Publication date: 2009-04-08
Anticipated expiration: 2018-05-23

Abstract

The utility model relates to a heat exchanging device, particularly to an aluminium coaxial heat exchanger, comprising an outer tube, an inner tube which is a multithread coil pipe arranged in the outer tube, a refrigerant inlet and a refrigerant outlet are respectively arranged on two ends of the outer tube, and communicate with a channel between the outer tube and the inner tube; a water inlet and a water outlet are respectively mounted on two ends of the inner tube, and communicate with the inner tube. A layer of polytetrafluoroethylene is evenly coated on a surface of the inner tube. The utility model has the beneficial effect that, the aluminium coaxial heat exchanger has good heat exchanging efficiency due to the structual design of the multithread coil pipe, a layer of polytetrafluoroethylene is evenly coated on a surface of the inner tube, therefore the aluminium inner tube can not erode, making it possible that aluminium replaces copper to manufacture the heat exchanger, the aluminium materials are adopt to replace expensive copper source, thereby saving cost; the aluminium coaxial heat exchanger replaces common copper double-pipe heat exchanger applied in water source/ground heat pump system, air source heat pump water heater and other special industries.

Description

The coaxial heat exchanger of aluminium

Technical field

The utility model relates to a kind of heat-exchange device, particularly the coaxial heat exchanger of aluminium.

Background technology

Heat exchanger is widely used in each relevant departments, is indispensable common apparatus.The material of double-tube heat exchanger is mainly iron and red copper on the market at present, iron and copper-nickel alloy, red copper and copper-nickel alloy, titanium etc., in double-tube heat exchanger, be in absolute status, but copper belongs to scarce resource, be the non-ferrous metal very close with mankind's relation, be widely used in fields such as electric, light industry, machine-building, building industry, national defense industry, copper is most widely used in electric, electronics industry, be used for various cables and lead, the winding of motor and transformer, switch and printed substrate etc.In machinery and haulage vehicle manufacturing, be used for process industry valve and accessory, instrument, sliding bearing, mould, heat exchanger and pump etc.In chemical industry, be widely used in making vacuum, boiler, brew kettle etc.In national defense industry in order to make bullet, shell, firearms part etc.In building industry, be used as various pipelines, pipe fitting, trim component etc., therefore Chinese copper resource is very deficient, hold at high price, and bauxite resource is abundant relatively.Therefore, how to make double pipe heat exchanger with aluminium substitution copper is a research and development problem that has potentiality, and far-reaching social benefit and use value are arranged.

The utility model content

The utility model is for overcoming the deficiencies in the prior art part, purpose is to provide aluminium coaxial heat exchanger, pipe internal surface is coated with the last layer polytetrafluoroethylene (PTFE) equably in the coaxial heat exchanger of this aluminium, raising is to the barrier propterty of water, because of polytetrafluorethylecoatings coatings can long-term work under+250 ℃ to-180 ℃ temperature, has excellent chemical stability, corrosion resistance, sealing, high lubricated not viscosity, electrical insulating property and good anti-aging endurance, there is erosion in Guan Buhui in the aluminium, makes aluminium substitution copper production heat exchanger become possibility.

The utility model is to achieve the above object by the following technical programs: the coaxial heat exchanger of aluminium, comprise outer tube, interior pipe, interior pipe is multi-start helical tubes, interior pipe is installed in the outer tube, refrigerant import and refrigerant exit are installed in the two ends of outer tube respectively, and are connected with passage between outer tube, the interior pipe, the two ends of pipe in water inlet and delivery port are installed in respectively, and be connected with interior pipe, be coated with the last layer polytetrafluoroethylene (PTFE) equably at interior pipe internal surface.

Described outer tube, interior pipe are aluminum pipe.

Described outer tube is plate-like ringwise.

As preferably, described multi-start helical tubes is the four-start spiral pipe.

The beneficial effects of the utility model: the coaxial heat exchanger of aluminium, because inner tubal wall adopts the structural design of multiple thread pipe, so heat exchange action is good, be coated with the last layer polytetrafluoroethylene (PTFE) equably at interior pipe internal surface, there is erosion in Guan Buhui in the aluminium, make aluminium substitution copper production heat exchanger become possibility, adopt aluminium material to replace valuable copper resource, save cost; The coaxial heat exchanger of this aluminium can replace common copper double-tube heat exchanger to be applied to water source/earth-source hot-pump system, air source hot pump water heater and some other special industry.

Description of drawings

Fig. 1 is the structural representation of the coaxial heat exchanger of aluminium among the embodiment 1 in the utility model;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the A-A cutaway view of Fig. 1.

The specific embodiment

Embodiment 1: below in conjunction with accompanying drawing the utility model is further elaborated:

As shown in the figure, the coaxial heat exchanger of aluminium comprises outer tube 1, interior pipe 6, and interior pipe is the four-start spiral pipe, interior pipe 6 is installed in the outer tube 1, refrigerant import 4 and refrigerant exit 3 are installed in the two ends of outer tube 1 respectively, and are connected the two ends of pipe 6 in water inlet 2 and delivery port 5 are installed in respectively with passage between outer tube 1, the interior pipe 6, and be connected with interior pipe 6, be coated with last layer polytetrafluoroethylene (PTFE) 7 equably at interior pipe 6 inner surfaces, described outer tube 1, interior pipe 6 are aluminum pipe, and described outer tube 1 is plate-like ringwise.

Because inner tubal wall adopts multi-start helical tubes, multi-start helical tubes has the heat exchange efficiency and the lower pressure loss preferably, simultaneously interior pipe is placed in the outer tube, and the gap between interior pipe and the outer tube is cut apart equably, the common contact area of refrigerant and water is strengthened, strengthen the effect of heat exchange; At the two ends of passage is respectively refrigerant exit and refrigerant inlet; The two ends of interior pipe are respectively water inlet and delivery port, so that the flow direction of water and refrigerant is opposite, guarantee that heat exchanger can carry out sufficient heat exchange.Because interior pipe is leaked water, aluminium is to water quality sensitivity very, still there is erosion in the rustproof aluminum alloy of not doing protective treatment, the utility model is coated with the last layer polytetrafluoroethylene (PTFE) equably at internal pipe internal surface, raising is to the barrier propterty of water, can long-term work under+250 ℃ to-180 ℃ temperature because of polytetrafluorethylecoatings coatings, polytetrafluoroethylene (PTFE) (Teflon or PTFE) is commonly called as " plastics king ".Has excellent chemical stability, corrosion resistance, sealing, high lubricated not viscosity, electrical insulating property and good anti-aging endurance.Except that motlten metal sodium and liquid fluorine, other all chemicals of ability boil also in water and do not change.These characteristics of polytetrafluoroethylene (PTFE) make aluminium substitution copper production heat exchanger become possibility, adopt aluminium material to replace valuable copper resource, save cost; The coaxial heat exchanger of this aluminium can replace common copper double-tube heat exchanger to be applied to water source/earth-source hot-pump system, air source hot pump water heater and some other special industry.The coaxial heat exchanger of aluminium recited above can be made different shape with the heat-exchange tube of outer tube and interior pipe composition, satisfies various demands, conserve space.

Claims

1, the coaxial heat exchanger of aluminium, comprise outer tube (1), interior pipe (6), interior pipe is multi-start helical tubes, interior pipe (6) is installed in the outer tube (1), refrigerant import (4) and refrigerant exit (3) are installed in the two ends of outer tube (1) respectively, and are connected with passage between outer tube (1), the interior pipe (6), and water inlet (2) and delivery port (5) are installed in the two ends of interior pipe (6) respectively, and be connected with interior pipe (6), it is characterized in that being coated with last layer polytetrafluoroethylene (PTFE) (7) equably at interior pipe (6) inner surface.

2, the coaxial heat exchanger of aluminium according to claim 1 is characterized in that described outer tube (1), interior pipe (6) are aluminum pipe.

3, the coaxial heat exchanger of aluminium according to claim 1 and 2 is characterized in that described outer tube (1) plate-like ringwise.

4, the coaxial heat exchanger of aluminium according to claim 1 and 2 is characterized in that described multi-start helical tubes is the four-start spiral pipe.