CN101363697A - High-efficiency heat exchange tube with minuteness passage - Google Patents
High-efficiency heat exchange tube with minuteness passage Download PDFInfo
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- CN101363697A CN101363697A CNA2008101430213A CN200810143021A CN101363697A CN 101363697 A CN101363697 A CN 101363697A CN A2008101430213 A CNA2008101430213 A CN A2008101430213A CN 200810143021 A CN200810143021 A CN 200810143021A CN 101363697 A CN101363697 A CN 101363697A
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Abstract
The invention discloses a high-efficient heat exchange tube with a fine channel structure, which consists of an outer tube and a non-conducted inner tube that are sleeved with each other. The heat exchange tube is characterized in that a regular or irregular fine channel with the hydraulic diameter less than 3mm is formed between the outer tube and the inner tube; and the fine channel assumes a helical shape, a helical-like shape or a flat shape along the axial direction of the inner tube. The invention has the advantages of realizing the technology that an air-conditioning heat exchanger transfer heat through fine channel, eradicating the defects of the difficulty of dewatering and defrosting, heating impossibility, and the like, in the existing parallel follow art, realizing helixication of the fine channel, breaking through the problem that the common heat exchange tube can carries out high-efficient heat exchange on only one side, weakening or eliminating the stratosphere hindering heat exchange, which realize comprehensive high-efficient heat exchange of the whole heat exchange tube, maintaining the prior production equipment and the prior production process of a factory, maintaining the prior integral structure mode of the heat exchanger, and avoiding the problem that the prior production equipment and prior production process have to be replaced by adopting the prior parallel flow art, which greatly reduce cost.
Description
Technical field
The present invention relates to a kind of efficient heat-exchanging pipe with minuteness passage, this heat exchanger tube is mainly used in the heat exchanger of refrigeration industries such as air-conditioning, also can be used in chemical industry, oil, the energy, machinery, power, biology, the medicine and other fields.
Background technology
Air-conditioner adopts fin-tube heat exchanger mostly at present.National departments concerned will improve air-conditioning efficiency standard in clear and definite 2009, and the entry threshold of air-conditioning product Energy Efficiency Ratio can rise to more than 3.0 from present 2.6 when the time comes, need badly and adopt new augmentation of heat transfer technology, reach purpose of energy saving.Because the dimensional effect of micro-channel, under the unit are and the unit temperature difference, the microchannel of little caliber has stronger exchange capability of heat, [Liu Huanling, Jia Jianyuan, Shao Xiaodong. the heat exchange characteristics of circular microchannel and dimensional effect, XI AN JIAOTONG UNIVERSITY Subject Index, 2007,41 (11): 1288-1292] studies show that, along with reducing of size, average heat exchange efficiency increases.
In recent years, the development of microchannel heat transfer technology rapidly.Parallel-flow heat exchanger adopts fine multi-channel flat pipe as heat exchanger tube, is widely used in the air conditioning for automobiles field, has significantly improved the heat exchange efficiency of heat exchanger.But, because the technological principle of parallel-flow heat exchanger, its heating condition is difficult to realize the defrosting of heat exchanger down, so the range of application of parallel-flow heat exchanger only is confined to the gas cooler of automobile condenser system at present, patent CN 1749680A discloses a kind of micro-channel evaporator that is applied to domestic air conditioning, it does not thoroughly solve the difficult chronic illness of parallel-flow heat exchanger draining defrosting, it still can't solve parallel-flow heat exchanger structure relative complex simultaneously, be difficult for bending, being used for domestic air conditioning needs difficult problems such as casing redesigns, if this just means the just thorough replacing production line of needs of enterprise's operation parallel-flow heat exchanger air-conditioning, drop into height and allow and to bear with regard to the meagre Air-conditioning Enterprise of profit originally.
Therefore, improve the heat exchange efficiency of fin-tube type heat exchanger, the research and development efficient heat-exchanging pipe receives much concern, paper " pressure that has an internally finned tube of longitudinal ripple descends and the experimental study of hot transfer characteristic " [B.Yu, J.Nie, Q.W.Wang, W.Q.Tao.Experimental study on the pressure drop and heattransfer characteristics of tubes with internal wave-like longitudinalfins, Heat and Mass transfer, 2004,40:643-651] internally finned tube that has longitudinal ripple that a kind of two ends are stopped up proposed, it has increased the heat exchange area in the pipe greatly, heat exchange efficiency improves, but because fin is divided into two parts to the circular passage between two pipes, when fluid flow through the passage of being made up of fin and interior pipe, this fluid will pass through fin with the heat conduction outside the pipe, the pad of fin and pipe, outer tube just can be finished, so the heat exchange efficiency of this fluid is very low.
Patent CN 1677044A discloses the thermoexcell of a kind of oil cooler etc., it improves aforesaid heat exchanger tube, on fin, offer through hole, but the through hole both sides temperature difference is very little, be difficult to realize heat exchange, heat exchange efficiency still is difficult to improve, and does not still have to solve a heat exchange efficiency raising difficult problem of being made of the fluid of passage fin and interior pipe.Moreover above-mentioned two kinds of technology mentioning do not consider that all the heat exchange efficiency of heat exchanger tube windward side fluid and lee face fluid there are differences, and particularly the heat exchange efficiency of lee face does not improve.(in order to improve heat exchange efficiency, a side of tubing in the air-conditioning body, a small fan is housed usually, in the use of air-conditioning, open small fan, quicken gas flow, the heat exchange efficiency of tubing windward side is increased, and the lee face of tubing, gas flow is little to its influence, and heat exchange efficiency is very low.)
Summary of the invention
The present invention is directed to above-mentioned technical problem, a kind of efficient heat-exchanging pipe with minuteness passage is proposed: the microchannel heat transfer technology of one, realizing air-condition heat exchanger, because outer tube adopts pipe or streamline tube, the cooling water of outer tube outer wall is easy to discharge downwards along tube wall, thoroughly eradicated existing concurrent flow technology (the adopt microchannel heat transfer technology) row of dewatering frost difficult with defective such as can not heat; Two, on the basis of existing concurrent flow technology, the technological merit of the microchannel of Bao Liuing not only, but also can do significant improvement, realize the spiralization of microchannel, broken through on the one hand the difficult problem that common heat exchanger tube can only a side high efficient heat exchanging, on the other hand by the centrifugal force of screw fluid, slackened or eliminated the stratosphere that hinders heat exchange, realized the comprehensive high efficient heat exchanging of whole heat exchanger tube jointly, if through further improving, also can be improved to non-smooth interior microchannel to common smooth inner wall microchannel, make heat exchange efficiency further improve; Three, can keep the original production equipment of manufacturer and original production technology, the original overall structure form of maintenance heat exchanger, avoid adopting existing concurrent flow technology thoroughly replacing existing equipment and production technology, significantly reduce cost.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of efficient heat-exchanging pipe with minuteness passage, interior pipe box dress by outer tube and not conducting is formed, it is characterized in that, between described outer tube and interior pipe, form rule or the irregular micro-channel of hydraulic diameter less than 3mm, and micro-channel along interior tubular axis to direction shape or similar helical form or flat in the shape of a spiral.
Described micro-channel is formed by the spiral on the inner surface of the outer surface of interior pipe or outer tube or class spiral or the straight relative light face closure with it of double wedge; Perhaps, described micro-channel is formed by the spiral on the inner surface of the outer surface of interior pipe or outer tube or class spiral or the straight relative light face closure with it of groove.
Described micro-channel is to be formed by double wedge on the inner surface of the spiral on the outer surface of interior pipe (or class spiral, or straight) double wedge or groove and outer tube or groove sealing.
The hydraulic diameter of described micro-channel is 0.1～1.5mm.
Described outer tube cast, its surface helps the dispersion of fluid, as is easy to get rid of pipe, the streamline tube of condensed water.
Can be provided with screw thread on the inner surface of the outer surface of pipe or outer tube in described; Described screw thread is internal thread or external screw thread.
Pipe is the special pipe of pipe, square tube, three cornues, polygonal pipe, plum blossom pipe, wave pipe or other shapes in described.
The protuberance shape of described double wedge or the recess shapes of groove are triangle, trapezoidal, rectangle, mountain peak shape, stage teeth (some tooth profile of tooth is higher, and some tooth profile of tooth is lower) or waveform.
Pipe is pipe in different many of diameter in described, the not conducting of interior pipe of diameter minimum, and in each pipe according to the combination of size order suit successively after again with the outer tube suit, have micro-channel between pipe in described.
The material of described outer tube is metal, metal-base composites, thermal conductive ceramic, comprise aluminium and aluminium alloy, copper and copper alloy, iron, steel etc., the material of pipe is organic or inorganic materials such as metal, plastics, rubber, pottery, composite in described, its metal comprises aluminium and aluminium alloy, copper and copper alloy, iron, steel etc., when interior pipe adopted plastics, rubber, pottery, the cost of material can obviously reduce.
Position, somewhere in the interior Guan Zaiguan of described diameter minimum (blocked in the middle of can being, as also can be that two ends are blocked) is artificially stopped up, i.e. not conducting, and purpose is to force fluid to flow from the micro-channel between interior pipe and the outer tube.
Owing to adopt micro-channel, the micro-dimension effect highlights, when fluid is flowed through pipeline, surface tension plays a major role, the flow behavior that causes gas-liquid two-phase fluid in it changes, moreover, owing to diminishing of passage, the area of the tube surfaces of unit volume fluid contact will increase, and this all helps the increase of tubing heat exchange efficiency.At last, under the certain situation of flow, owing to diminishing of caliber, flow rate of fluid increases, and this helps the stratospheric thickness of attenuate outer tube wall side, thereby increases the exchange capability of heat of tubing.
The outer tube that outer tube of the present invention can adopt present heat exchanger generally to use, interior pipe then is nested in outer tube, between inner and outer pipes, form micro-channel, can not change on the basis of production equipment, air-conditioning profile etc. in enterprises such as guaranteeing air-conditioning, heat exchanger like this, realize the micro-dimension effect of tubing, increased the exchange capability of heat of tubing greatly.
Moreover, if pipeline is helical form or class helical form, first, when fluid is flowed through pipeline, it is subjected to action of centrifugal force, and the outer tube wall side is formed certain impact, makes that influencing the stratosphere of heat exchange efficiency usually is difficult to form even eliminate, be converted into turbulent convection heat transfer' heat-transfer by convection by stratospheric conduction heat transfer, increased the heat exchange efficiency of tubing greatly; Second, for existing tubing, windward side fluid heat exchange efficiency is higher than the lee face fluid far away in the tubing, so just make that windward side fluid and lee face fluid formation temperature are poor, cause the tubing shortcoming of cold side heat on one side, influence its service life, the more important thing is that the heat exchange efficiency of lee face fluid is lower, suppress the lifting of tubing heat exchange efficiency.And the exchange of windward side fluid and lee face fluid has been realized in spiral microchannel or class spiral microchannel, has avoided above-mentioned shortcoming, has improved the heat exchange efficiency of tubing greatly.The 3rd, owing to adopt spiral microchannel or class spiral microchannel, under the situation of the same pipe length of heat exchanger tube, increased the flow path of fluid, this just means has increased heat exchange area, and the heat exchange efficiency of tubing further increases so.
Below the present invention made further specify.
Referring to Fig. 1 and Fig. 2, the interior pipe 2 that efficient heat-exchanging pipe with minuteness passage of the present invention is stopped up by outer tube 3 and somewhere is formed, outer tube is a pipe, the inner surface of outer tube can be regular or irregular spiral (as shown in figure 11) or class spiral or straight double wedge (or groove) (as shown in Figure 2), also can be the light face; Interior pipe is rule or irregular pipe, and the double wedge of interior pipe (or groove) is regular or irregular spiral (as shown in figure 10) or the double wedge 5 of class spiral (as shown in Figure 9) or straight (as shown in figure 12) (or groove).Between described outer tube 3 and interior pipe 2 and along the body axis direction, form a plurality of spirals or class spiral or straight micro-channel 4.Described micro-channel is meant the hydraulic diameter of this micro-channel less than 3mm, and preferred microchannel hydraulic diameter (hydraulic diameter=2 * actual internal area/wetted perimeter is long) is generally 0.1-1.5mm.
Described micro-channel 4, be to form by the spiral on the inner surface of the outer surface of interior pipe or outer tube or class spiral or the straight relative light face closure of double wedge 5 (or groove) with it, also can be by the spiral on the outer surface of interior pipe or class spiral or straight double wedge (or groove), form with spiral on the inner surface of outer tube or class spiral or the straight common sealing of double wedge (or groove).
Described double wedge (or groove) can be shapes such as triangular form, ladder type, mountain peak type, stage teeth, waveform.
Further, can also be processed into corresponding external screw thread or female thread structure to the described light face of interior pipe 2 and outer tube 3, perhaps the Surface Machining of described double wedge and groove is become helicitic texture, with heat exchange area and the mobile turbulence level of increase fluid that increases micro-channel, further improve the heat exchange efficiency of heat exchanger tube.
Know-why of the present invention is, described in somewhere blocked (sealing) and become pipe not conducting in the two ends of pipe 2 or the tube chamber, it is mobile that cold-producing medium only can pass through micro-channel 4; Under same traffic, first, owing to adopt micro-channel, when fluid was flowed through pipeline, surface tension played a major role, and caused that the flow behavior of gas-liquid two-phase fluid in it changes, moreover, because passage diminishes, the superficial density of tubing increases (superficial density refers to the tube surfaces area that the unit volume fluid need contact), and this all helps the tubing heat exchange efficiency increases; The second, because central tube is blocked, efficient heat-exchanging pipe of the present invention has increased fluid-flow rate, attenuate the stratospheric thickness of outer tube wall side; The 3rd, because microchannel of the present invention is to be combined closely by the double wedge on two sleeve pipes (or groove) to form, by to double wedge (or groove) is processed into helical form, just can realize the helicoidal structure of microchannel, this structure makes fluid have centrifugal action, fluid constantly impacts the stratosphere of outer tube inboard, plays attenuate even eliminates stratospheric effect, has strengthened heat exchange efficiency; At last, the spiral microchannel transforms windward side fluid and lee face fluid mutually, has increased the flow path (promptly increasing contact area and time of contact) of fluid simultaneously, further strengthens the heat exchange efficiency of tubing.
During actual production, can be at first by rising by plumber's skill (in the present fin-tube type heat exchanger production process, the general technology of Cai Yonging, promptly adopt machinery to rise, tubing is risen greatly, thereby the pipe wing is combined closely), perhaps by spinning process or bonding process or welding procedure, the outer fin of outer tube and tube is combined closely, and then put into pipe, the interior pipe 2 that has formed a plurality of micro-channels closely is connected with outer tube 3.
The advantage that the present invention compared with prior art has: (1) the present invention is on the basis of original fin-tube heat exchanger, prepare micro-channel efficient heat-exchanging pipe with micro-dimension effect, give full play to fluid micro-dimension effect and realize heat exchange, increased the heat exchange efficiency of tubing greatly; (2) with respect to the concurrent flow technology (flat tube that adopts as concurrent flow, form the flat micro-channel by extrusion process, can't realize the spiralization of microchannel), because microchannel of the present invention is to be combined closely by the double wedge on two sleeve pipes (or groove) to form, by to double wedge (groove) is processed into helical form, just be easy to realize the helicoidal structure of microchannel.Adopt this structure, fluid is subjected to centrifugal action, has produced the percussion to the outer tube wall side, has increased the fluid turbulence degree, and attenuate even eliminated stratosphere has increased substantially the exchange capability of heat of fluid; Helical structure has been realized the automatic exchange of windward side fluid and lee face fluid, has avoided in the traditional piping material that lee face fluid thermal exchange rate is low, the tube fluid shortcoming of cold side heat on one side; (3) can perhaps to the screw thread processing of double wedge and groove surfaces, realize having the micro-channel of female thread structure by internal thread machining, heat exchange efficiency is further improved inner and outer pipe light face.(4) more crucial breakthrough meaning is, because outer tube is not to adopt existing concurrent flow technology flat cast commonly used, but adopt the pipe cast that has fin-tube type heat exchanger now, therefore can keep the version of the heat exchanger of existing main flow, it is constant substantially to keep original production equipment of most manufacturers and production technology, need to increase production cost hardly, therefore have realistic meaning.(5) outer tube adopts pipe or streamline tube, can also eradicate the difficult congenital technological deficiency of the row of dewatering frost that existing concurrent flow technology flat tube brings, and that has eliminated also that flat tube brings is difficult to a technology difficult problem such as bending, so is a kind of breakthrough technological innovation.
On the one hand, the present invention has realized the microchannel heat transfer technology of existing fin-tube type heat exchanger, under the certain situation of flow, the heat exchange efficiency of flat micro-channel of the present invention improves more than 10% than common tubing, on the other hand, with respect to existing Thermal Performance of Micro Channels technology, the present invention can further realize the spiralization of microchannel, the present invention combines the advantage of microchannel and helical duct, has increased the heat exchange efficiency of tubing greatly.Under the certain situation of flow, spiral Thermal Performance of Micro Channels pipe of the present invention (the microchannel inwall is the light face) is with respect to common copper pipe, heat exchange efficiency can improve 10%-300%, moreover, as the light face is processed into internal thread or external screw thread, can further strengthen the turbulence level of fluid in the micro-channel, increase the heat-transfer effect of fluid, the heat exchange efficiency of tubing also can improve more than 10% on this basis.In addition, interior pipe of the present invention not only is confined to pipe, also can be processed into any regular or irregular tubing, as interior pipe being processed into triangle (as shown in Figure 9), processing is simple, and cost is low, under the certain situation of flow, its heat exchange efficiency improves more than 10% than common aluminum pipe.If the outer tube caliber is bigger, the form that the present invention can also adopt a plurality of interior pipes to be nested forms many row's micro-channels (as shown in Figure 8), has increased the exchange capability of heat with pipe greatly.
Description of drawings
Fig. 1 is the cross-sectional structure schematic diagram of pipe in the abnormity of the present invention;
Fig. 2 is the cross-sectional structure schematic diagram of the present invention's abnormity outer tube;
Fig. 3 is first kind of embodiment product cross section structural representation of the present invention;
Fig. 4 is second kind of embodiment product cross section structural representation of the present invention;
Fig. 5 is the third embodiment product cross section structural representation of the present invention;
Fig. 6 is the 4th a kind of embodiment product cross section structural representation of the present invention;
Fig. 7 is the 5th a kind of embodiment product cross section structural representation of the present invention;
Fig. 8 is the 6th a kind of embodiment product cross section structural representation of the present invention;
Fig. 9 is the 7th a kind of embodiment product cross section structural representation of the present invention;
Figure 10 is the structural representation that outer wall of inner tube of the present invention has class spiral prominence toothing;
Figure 11 is the structural representation that outer wall of inner tube of the present invention has the spiral prominence toothing;
Figure 12 is the structural representation that outer tube wall of the present invention has the spiral prominence toothing;
Figure 13 is the structural representation that outer wall of inner tube of the present invention has flat double wedge structure.
Label declaration: 1-blockage body, 2-interior pipe, 3-outer tube, 4-micro-channel, 5-double wedge.
The specific embodiment
Be further described below with reference to accompanying drawing.
Embodiment 1: as shown in Figure 3, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the not conducting of blockage body 1 by locating in outer tube 3 and two ends or its tube chamber; The external diameter of the interior pipe 2 that adopts is 6mm, its outer wall has the spiral prominence toothing 5 of spiral triangular structure, and the internal diameter of outer tube 3 is 9mm, and its inwall is the light face, form about 16 nearly trapezoidal micro-channels 4 thus between pipe 2 and the outer tube 3, the hydraulic diameter of microchannel is about 0.5mm.Interior pipe 2 closely is connected by rise pipe or welding with outer tube 3.The material of tubing all adopts aluminium, and under same traffic, the heat exchange efficiency of this tubing improves more than 20% than the common aluminum pipe with caliber.
Embodiment 2: as shown in Figure 4, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the not conducting of blockage body 1 by locating in outer tube 3 and two ends or certain tube chamber; External diameter is 9mm in the outer tube, its inwall has the flat double wedge 5 of triangular structure, interior pipe 2 external diameters are 6mm, its outer wall is the light face, form 16 nearly trapezoidal flat micro-channels 4 between two pipes, the hydraulic diameter of microchannel is about 1mm, and tubing adopts copper pipe, under identical flow, its heat exchange efficiency improves more than 10% than the common inner screw thread copper pipe with caliber.
Embodiment 3: as shown in Figure 5, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the not conducting of blockage body 1 by locating in outer tube 3 and two ends or certain tube chamber; The external diameter of interior pipe 2 is 6mm, its outer wall has the spiral double wedge 5 of spiral trapezium structure, the internal diameter of outer tube 3 is 9mm, its inwall is a female thread structure, combine with the internal thread of outer tube by spiral double wedge 5, form a plurality of spiral micro-channels 4 betwixt, the about 1mm of the hydraulic diameter of microchannel, tubing adopts copper pipe, because the internal thread in the micro-channel plays the effect that increases heat exchange area and increase fluid turbulence, under identical flow, the heat exchange efficiency of this tubing improves more than 20% than the common copper pipe with caliber.
Embodiment 4: as shown in Figure 6, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the not conducting of blockage body 1 by locating in outer tube 3 and two ends or certain tube chamber; The internal diameter of outer tube 3 is 9mm, its inwall has the double wedge 5 of helical form trapezium structure, the external diameter of interior pipe 2 is 6mm, its outer wall is the external spiral structure, combines with the external screw thread of interior pipe by trapezoidal double wedge 5, forms a plurality of spiral micro-channels 4 betwixt, the about 1.5mm of the hydraulic diameter of microchannel, tubing adopts copper pipe, and under identical flow, the heat exchange efficiency of this tubing improves more than 20% than the common copper pipe with caliber.
Embodiment 5: as shown in Figure 7, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the not conducting of blockage body 1 by locating in outer tube 3 and two ends or certain tube chamber; The internal diameter of outer tube 3 is 9mm, its inwall has the double wedge 5 of flat trapezium structure, the external diameter of interior pipe 2 is 6mm, its outer wall has the double wedge 5 of flat triangular structure, by combining of trapezoidal double wedge 5 and triangle double wedge 5, forms a plurality of straight micro-channels 4 betwixt, the about 1mm of the hydraulic diameter of microchannel, tubing adopts aluminum pipe, and under identical flow, the heat exchange efficiency of this tubing improves more than 20% than common aluminum pipe.
Embodiment 6: as shown in Figure 8, the efficient heat-exchanging pipe with minuteness passage of the present invention is formed by locating in outer tube 3 and two ends or certain tube chamber to be nested by pipe 2 in two not conductings of blockage body 1; The internal diameter of outer tube is 12mm, intervalve external diameter be 9mm, the external diameter of interior pipe is 6mm, form a plurality of spiral micro-channels 4 respectively between the interior pipe at the interior pipe of outer tube and centre and middle interior pipe and center, the hydraulic diameter of micro-channel is 0.5-1.5mm, the material of tubing adopts aluminum pipe, and under same traffic, its heat exchange efficiency improves more than 20% than the common aluminum pipe with caliber.
Embodiment 7: as shown in Figure 9, the efficient heat-exchanging pipe with minuteness passage of the present invention is made up of pipe 2 in the triangle of blockage body 1 by locating in outer tube 3 and two ends or certain tube chamber; The internal diameter of outer tube is 6mm, and the length of side of interior pipe is about 5.2mm, is the triangle helical form, form three spiral microchannels between outer tube and the interior pipe, its hydraulic diameter is 0.1-0.6mm, and tubing is aluminum pipe, under same traffic, its heat exchange efficiency improves more than 20% than the common aluminum pipe with caliber.
Figure 10～12 are for having spiral helicine situation between outer tube and the interior pipe, and Figure 13 is the situation of flat for micro-channel.
Although several embodiments of the present invention is represented and is described, it should be appreciated by those skilled in the art, multiple change can be made for these embodiments, and principle of the present invention and spirit can be do not exceeded.Scope of the present invention is limited by claim.
Claims (10)
1. efficient heat-exchanging pipe with minuteness passage, interior pipe box dress by outer tube and not conducting is formed, it is characterized in that, form rule or the irregular micro-channel of hydraulic diameter between described outer tube and the interior pipe less than 3mm, and micro-channel along interior tubular axis to direction shape or similar helical form or flat in the shape of a spiral.
2. the efficient heat-exchanging pipe with minuteness passage according to claim 1 is characterized in that, described micro-channel is formed by spiral on the inner surface of the outer surface of interior pipe or outer tube or the straight relative light face closure with it of double wedge; Perhaps, described micro-channel is formed by spiral on the inner surface of the outer surface of interior pipe or outer tube or the straight relative light face closure with it of groove.
3. the efficient heat-exchanging pipe with minuteness passage according to claim 1, it is characterized in that described micro-channel is to be formed by the spiral on the outer surface of interior pipe or straight double wedge or the spiral on groove and the outer pipe internal surface or straight double wedge or groove sealing.
4. according to claim 2 or 3 described efficient heat-exchanging pipes, it is characterized in that the hydraulic diameter of described micro-channel is 0.1～1.5mm with minuteness passage.
5. the efficient heat-exchanging pipe with minuteness passage according to claim 4 is characterized in that, the outer surface of described interior pipe or the inner surface of outer tube are provided with screw thread; Described screw thread is internal thread or external screw thread.
6. the efficient heat-exchanging pipe with minuteness passage according to claim 5 is characterized in that, described outer tube is pipe or streamline tube.
7. the efficient heat-exchanging pipe with minuteness passage according to claim 1 is characterized in that, described interior pipe is the special pipe of pipe, square tube, three cornues, polygonal pipe, plum blossom pipe, wave pipe or other shapes.
8. the efficient heat-exchanging pipe with minuteness passage according to claim 6 is characterized in that, the protuberance shape of described double wedge or the recess shapes of groove are triangle, trapezoidal, rectangle, mountain peak shape, stage teeth or waveform.
9. according to claim 1 or 5～8 each described efficient heat-exchanging pipes with minuteness passage, it is characterized in that, pipe is pipe in different many of diameter in described, the not conducting of interior pipe of diameter minimum, and in each pipe according to the combination of size order suit successively after again with the outer tube suit, have micro-channel between pipe in described.
10. the efficient heat-exchanging pipe with minuteness passage according to claim 9 is characterized in that, the material of described outer tube is metal heat-conducting pottery, metal-base composites, and interior tubing matter is metal, composite, plastics, rubber, pottery.
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| CNA2008101430213A CN101363697A (en) | 2008-09-28 | 2008-09-28 | High-efficiency heat exchange tube with minuteness passage |
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- 2008-09-28 CN CNA2008101430213A patent/CN101363697A/en active Pending
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