CN1211721A

CN1211721A - Internal circulation type liquid heat-exchanger

Info

Publication number: CN1211721A
Application number: CN 98115890
Authority: CN
Inventors: 鲍锐
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-15
Filing date: 1998-08-15
Publication date: 1999-03-24
Anticipated expiration: 2018-08-15
Also published as: CN1099578C

Abstract

A liquid heat exchanger with internal circulation features that an endless circulating channel in which there is heat-transfer tube bank is arranged in an enclosed rectangular box and the liquid flows through heat-transfer tube bank at optmal speed for heat exchange. Its advantages are high heat exchange efficiency and low cost.

Description

Internal circulation type liquid heat-exchanger

Internal circulation type liquid heat-exchanger of the present invention is a kind of manufacture method of heat exchanger, belongs to the refrigeration and air-conditioning technical field of heat enginnering.

For the surface-type liquid heat-exchanger, improve its heat transfer efficiency, must improve in the Exchanger Tubes simultaneously and the exothermic coefficient of the outer both sides of pipe.Improve the exothermic coefficient of tube fluid, depend on profile of tooth and flow rate of fluid in the heat-transfer pipe under the same conditions; Improve the exothermic coefficient of extratubal fluid, depend on the flow velocity and the flow direction of extratubal fluid.As coil pipe immersion evaporimeter, although it is very big that tube refrigerant is sidelong hot coefficient, because the flow velocity of extratubal fluid is very slow, only some free convections under the usual conditions for producing because of the temperature difference, even it is mixed to have adopted agitator that liquid is taken place, though therefore coil pipe immersion evaporimeter technology is simple, wide accommodation, because the thermal efficiency is too low, seldom produce in professional factory.And the dry pipe shell type evaporimeter owing in the outside of heat-transfer pipe some deflection plates are housed, forces liquid stream wavy mobile in order along radially being of heat-transfer pipe with certain speed, so heat exchange property strengthens greatly.But because the characteristics of dry pipe shell type evaporation structure, the two end cap sealing is relatively poor, brings difficulty for installation and maintenance.In addition, because the needs of assembling, deflection plate and cylindrical shell all leave certain design gaps between deflection plate and the heat-transfer pipe, be easy to assembly again often with its amplification in the manufacturing, thereby cause the liquid short circuit that is cooled, and have reduced exothermic coefficient.The 3rd, the liquid that is cooled is passed on heat pipe and radially is wavy and flows in cylindrical shell, and flow velocity also changes along with the cylindrical shell changes of section, causes therefrom that to arrange on maximum barrel diameter positions flow velocity at heat-transfer pipe the slowest.The 4th, the flow rate of liquid that is cooled in the cylindrical shell is controlled by the outer pump capacity of tube, so can't guarantee each equipment, under each operating mode, all obtains optimum flow rate, obtains ideal effect.The 5th, for the handpiece Water Chilling Units of big cold, the radical of heat-transfer pipe of evaporator is many, guarantee that freon liquid is uniformly distributed to each root pipe, is limited to the reason of existing structure and process technology, quite difficulty.

Purpose of the present invention is exactly the problem at above existence, creates a kind of internal circulation type liquid heat-exchanger.Can make liquid flow through the heat exchanger tube card with ideal velocity in this way and heat or cool off, its method technology is simple, and cost is low, the heat transfer efficiency height, and applicability is extensive.

Internal circulation type liquid heat-exchanger of the present invention is in the rectangular box of a sealing, and the road that a both ends open is established in its inboard is logical, and passage one end is equipped with screw, and the propeller shaft external part passes casing by the axle envelope and connects with motor.Be provided with some deflection plates in the middle of the casing, deflection plate and casing are fixed and are on top formed passage with following leaving certain gaps uncovered by the economic plan successively respectively, form end to end loop with the passage in the middle of inboard, liquid is circulated in case with designed speed under the driving of screw (or impeller).On casing and below respectively have an aperture to be used for feed liquor and fluid.Heat-transfer pipe is worn and is scurried each deflection plate, and two ends connect into the coiled pipe group with the U-shaped pipe, and afflux is led at each pipe group two ends respectively, and isocon is to form the import and export in heat exchanger cold (heat) source.

The advantage of internal circulation type liquid heat-exchanger of the present invention is:

1, can pass through change acquisition required flow rate to the geometrical property of motor speed and screw, obtain better heat-transfer effect.

2, applicability is good, applied range.This kind heat exchanger can be used for the heating of liquid, cooling; Can be used as the evaporimeter of refrigeration air-conditioner, condenser also can be used for the ice making cold-storage apparatus of ice-chilling air conditioning system.

3, good manufacturability in the processing and manufacturing, dependable performance in the use.

4, because heat transfer efficiency improves, material therefor reduces, and processing technology is simple, and expenses of labour reduces, good economy performance.

Accompanying drawing 1 is the front view of the structural representation of this internal circulation type liquid heat-exchanger, and wherein inner cycle channel (2-2) is made up of center-aisle (1-2) and deflection plate (2-1).

Accompanying drawing 2 is A-A section cutaway views of Fig. 1, and wherein (2-1) is the superincumbent deflection plate of breach.

Accompanying drawing 3 is B-B section cutaway views of Fig. 1, and wherein (2-2) is breach deflection plate below.

Embodiment of the present invention is as follows:

Uncovered in shape casing (1-1), in the middle of its bottom the passage (1-2) of a both ends open is arranged, passage one end is equipped with screw (4-1), the propeller shaft external part seals (4-2) by axle and passes casing and be connected with (speed governing) motor (4-3).Deflection plate has two kinds, (2-1) and bottom (2-2) leaving certain gaps uncovered by the economic plan on top respectively, on deflection plate, some circular holes are arranged by designing requirement, to pass successively the circular hole of heat-transfer pipe (3) from each deflection plate, scurry into tube bank, two ends are connected to form some coiled pipe groups with the U-shaped pipe, and current collector (3-3) is led at the two ends of each pipe group respectively, and current divider (3-2) is to form the import and export in heat exchanger cold (heat) source.After the pass the test, put into case, make the deflection plate at two ends be fixed on case inner bottom part center-aisle two ends and other relevant position, to form an end to end loop by box opening.Load onto case top (1-3) and seal, promptly form this internal circulation type liquid heat-exchanger.

Claims

1. the manufacture method of an internal circulation type liquid heat-exchanger, it is characterized in that it being with center-aisle inside the rectangular box and the synthetic end to end fluid circulation channel of baffle groups, under the driving of screw, liquid carries out heat exchange with required flow velocity by heat-transfer pipe.

2. internal circulation type liquid heat-exchanger manufacture method according to claim 1 is characterized in that the fluid circulating number of channels is 1-4.