CN2510814Y

CN2510814Y - Heat exchanger

Info

Publication number: CN2510814Y
Application number: CN 01279549
Authority: CN
Inventors: 李长盈; 陈厚成
Original assignee: Leidesi Waste-Reduction Sci & Tech Co Ltd Taiwan
Current assignee: Leidesi Waste-Reduction Sci & Tech Co Ltd Taiwan
Priority date: 2001-12-26
Filing date: 2001-12-26
Publication date: 2002-09-11
Anticipated expiration: 2011-12-26

Abstract

The utility model relates to a heat exchanger, composed of an inner pipe and an outer pipe which are sleeved mutually. A helical internal baffle extending along the inner pipe is arranged inside the inner pipe in order to make the fluid in the inner pipe be shaped like a swirl under the guidance of the internal baffle; a helical external baffle extending along the outer pipe is arranged between the inner pipe and the outer pipe in order to make the coolant between the inner and outer pipes which is circulating in the opposite direction as the fluid be shaped like a swirl as well under the guidance of the external baffle.

Description

Heat exchanger

Technical field

The utility model relates to a kind of heat exchanger, refers to especially a kind ofly can come direct fluid and cooling agent to produce eddy flow to promote the heat exchanger of cooling effect by spiral helicine guide plate.

Background technology

As shown in Figure 5, be a kind of gas heat-exchanger commonly used, it is used at the vacuum environment cooling steam, this heat exchanger 8 have a Curved Continuous warpage around body 81, the two ends of this body 81 have an inlet 811 and one outlet 812 respectively, and this body 81 is set in the cooling water tank 82, and the inlet 821 of this cooling water tank 82 is a side that is positioned at away from body 81 inlets 811.

During use, steam system in the vacuum environment is carried by the vacuum pump (not shown) and is entered by body 81 inlets 811, steam is flowed in body 81 and carry out heat exchange, and after cooling, discharge by the outlet 812 of body 81 again with cooling agent in the cooling water tank 82.

Because steam is the laminar condition that is stable in body 81, as shown in Figure 6A, under laminar condition, the heat energy at body 81 central point A places need conduct to the B point place of nearly body 81 inwalls, the cooling agent that could see through in body 81 and the cooling water tank 82 carries out heat exchange and cools off its hot conduction apart from longer, shown in Fig. 6 B, and need long heat conduction time, that is need longer pipe body 81 just can reach predetermined cooling effect.

But longer body 81 can take the big space of healing, and can form bending section 813 the more, and steam is the laminar condition that is stable in the flat segments 814 of body 81, when vapor stream can be because of the unexpected transformation that flows to during through bending section 813, and being reduced, flow velocity produces the resistance that steam flows, bending section 813 the more and longer body 81 length mean that then the resistance that the caliber crushing produces in the body 81 is bigger, and the horsepower that needs to strengthen vacuum pump just can be kept certain steam discharge speed to meet the required of vacuum environment, perhaps, the vacuum pump optimum vacuum that can show can descend because of all resistances and caliber crushing.

Certainly, except the structure of aforesaid heat exchanger 8, the heat exchanger that many different structure forms are still arranged, as: heat-exchangers of the plate type etc., but special geometry because of its runner, and can make vapor stream through the time produce bigger resistance, the resistance that steam is flowed increases, so, heat-exchangers of the plate type and other common heat exchanger at present all can't consider to take into account caliber crushing and the long-pending abundant use of heat-exchanger surface simultaneously, and heat-exchange capacity under vacuum and the ability of removing moisture should be considered simultaneously.

In sum, the cooling effectiveness when existing heat exchanger is used in cooling steam in the vacuum environment is relatively poor, volume is bigger, or volume is little but crushing that cause is big, and real in addition improved necessity is arranged.

Summary of the invention

Main purpose of the present utility model, be to solve the above problems and a kind of heat exchanger is provided, owing to should be provided with spiral helicine interior deflector in the interior pipe, make fluid in interior pipe, be subjected in deflector guiding and be the form of eddy flow, heat conduction efficiency with the riser inner fluid, and also be provided with spiral helicine outer deflector between pipe and this outer tube in being somebody's turn to do, the form that makes the cooling agent that circulates between inner and outer pipe be subjected to the guiding of outer deflector and be eddy flow equally improves heat conduction efficiency, and can reach the purpose that promotes cooling effect.

A time purpose of the present utility model, be since should in the coolant entrance position of inlet and this outer tube of pipe at different ends, make the fluid in pipe and the cooling agent in this outer tube in this be form, and can obtain the heat exchanger effectiveness of the best for reverse flow.

A purpose more of the present utility model ties up in this inside and outside piping and coils in the mode of spiral, when steam is flowed in interior pipe, can not increase the flow resistance of the steam that spiral advances, to reduce the load of vacuum pump.

The utility model provides a kind of heat exchanger, it comprises an interior pipe for fluid flow at least, with an outer tube for cooling agent or the circulation of other heat-exchange fluid, should be arranged in this outer tube inside by interior pipe, and the inner spiral helicine interior deflector along interior pipe extension that is provided with of pipe in being somebody's turn to do, and should in be provided with between pipe and this outer tube one along outer tube extend spiral helicine outside deflector, make fluid and cooling agent be subjected to the guiding of inside and outside guide plate respectively and produce eddy flow, with the cooling effect of raising heat exchanger.

Description of drawings

Fig. 1 is a stereo appearance figure of the present utility model;

Fig. 2 is a three-dimensional exploded view of the present utility model;

Fig. 3 is along 3-3 line cutaway view among Fig. 1;

The schematic diagram that Fig. 4 coils in the shape of a spiral for the inner and outer pipe of representing the utility model;

Fig. 5 is the structural representation of a kind of gas heat-exchanger commonly used;

Fig. 6 A is the schematic diagram of laminar condition for fluid in the heat exchanger tube commonly used;

Fig. 6 B is the long schematic diagram of heat exchanger tube central point heat conduction distance commonly used.

The specific embodiment

See also Fig. 1 to Fig. 3, the heat exchanger of present embodiment, include an interior pipe 1 for the steam circulation, with an outer tube 2 for coolant flow, should be arranged in this outer tube 2 by interior pipe 1, and in being somebody's turn to do, outer tube 1,2 is to coil with spiral, and should be provided with a spiral helicine interior deflector 11 along interior pipe 1 extension in the interior pipe 1, and should in pipe 1 and 2 of this outer tubes be provided with one outside outer tube 2 extensions spiral helicine deflector 21, and the two ends of pipe 1 are respectively the inlet 12 of fluid and export 13 in being somebody's turn to do, and this outer tube 2 is a coolant entrance 22 away from an end of the inlet 12 of interior pipe 1, and the other end then is a coolant outlet 23.

Owing to be provided with spiral helicine interior deflector 11 in the interior pipe 1, therefore, the eddy flow form that steam can be advanced in the shape of a spiral by interior deflector 11 guidings in interior pipe 1, that is, steam is the state of disturbance in interior pipe 1, but not as using the state that structure is laminar flow always, therefore, steam in the interior pipe 1 can overturn equably and contact with the tube wall of interior pipe 1, and can promote its heat conduction efficiency, and should in pipe 1 and 2 of this outer tubes be provided with spiral helicine outer deflector 21, make the guiding of deflector 21 outside interior pipe 1 and 2 flowing coolant of outer tube are subjected to and the eddy flow form of advancing equally in the shape of a spiral, therefore, cooling agent itself is also possessed good heat conduction efficiency, moreover, cooling agent system and the reverse convection current of steam, and can obtain best heat exchange effect, make heat exchanger of the present utility model possess preferable cooling effect.

And can improve heat exchange usefulness because of structure of the present utility model, therefore, in, outer tube 1,2 length can shorten, to reduce the volume of heat exchanger, moreover, in of the present utility model, outer tube 1,2 can adopt the mode of spiral to coil when circumnutating, as shown in Figure 4, therefore, steam can not increase the flow resistance of the steam that spiral advances when flowing in interior pipe 1, and can keep the required of preferable vacuum environment with the vacuum pump of low horsepower, and do not rise because of Cooling System Design causes the caliber crushing of integral device, to reduce equipment cost and use cost.

In sum, the utility model can be promoted following effect by said structure:

One, lifting cooling effect: owing to should be provided with spiral helicine interior deflector 11 in the interior pipe 1, make steam in interior pipe 1, be subjected in deflector 11 guiding and be the form of eddy flow, to promote the heat conduction efficiency of steam, and pipe 1 and 2 of this outer tubes also are provided with spiral helicine outer deflector 21 in being somebody's turn to do, the form that makes the cooling agent that circulates in 1,2 of inner and outer pipes be subjected to the guiding of outer deflector 21 and be eddy flow equally improves heat conduction efficiency, and can promote cooling effect.

Two, promote heat exchanger effectiveness: since should in 22 of the coolant entrances of inlet 12 and this outer tube 2 of pipe 1 at different ends, make that steam in pipe 1 and the cooling agent in this outer tube 2 are reverse convection current in this, and can obtain the heat exchanger effectiveness of the best.

Three, reduce the load of vacuum pump: this inner and outer pipe 1,2 is to coil in the mode of spiral, when steam is flowed in interior pipe 1, can not increase the flow resistance of the steam that spiral advances, with the load of reduction vacuum pump, and can keep required vacuum environment with the vacuum pump of low horsepower.

Claims

1. heat exchanger, it comprises an interior pipe for fluid flow at least, with an outer tube for coolant flow, should be arranged in this outer tube inside by interior pipe, and should in pipe inner be provided with one along interior pipe extend spiral helicine in deflector, and should in be provided with between pipe and this outer tube one outside outer tube extension spiral helicine deflector.

2. heat exchanger as claimed in claim 1 is characterized in that, the two ends of pipe are respectively the inlet and the outlet of fluid in this, and this outer tube is a coolant entrance away from an end of the inlet of interior pipe, and the other end then is a coolant outlet.

3. heat exchanger as claimed in claim 1 is characterized in that, this inner and outer pipe is the planform of spirality coiling.