CN1403779A - Internal thread heat-transferring pipe - Google Patents
Internal thread heat-transferring pipe Download PDFInfo
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- CN1403779A CN1403779A CN 02139462 CN02139462A CN1403779A CN 1403779 A CN1403779 A CN 1403779A CN 02139462 CN02139462 CN 02139462 CN 02139462 A CN02139462 A CN 02139462A CN 1403779 A CN1403779 A CN 1403779A
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- tooth
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- transfer pipe
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Abstract
The present invention provides one kind of internal thread heat-transferring pipe for use in the condenser and evaporator of refrigerating equipment and air conditioning equipment with single or mixed refrigerant. In the inner surface of the heat-transferring pipe, there are homogeneously arranged main screw teeth in different height and the relatively higher main screw teeth have miniature protuberance formed in the top. The alternate arrangement of the main screw teeth in different height can reinforce the disturbance to boiling and condensing heat exchange, reduce the heat boundary layer, reduce the angle between the speed vector and the temperature gradient vector, coordinate the speed field and temperature field, strengthen the boiling and condensing heat exchange and raise heat transferring efficiency.
Description
One, technical field
The present invention relates to a kind of heat-transfer pipe, particularly a kind of with single and mix refrigerant as operation material be used for freeze and air-conditioning equipment condenser and evaporimeter in female screw heat-transfer pipe.
Two, background technology
Use the unitary system cryogen at present, as HCFC-22, and mix refrigerant, as R407c and R410A, refrigeration machine and condensation in the air-conditioner and evaporation heat transfer pipe, it is most that what use is that inner surface has single spiral fluted heat-transfer pipe, this inner surface has single spiral fluted heat-transfer pipe (hereinafter referred to as two-dimentional micro-rib pipe), for light pipe, has good heat transfer property (U.S. Patent number, 4044797).After this there are many documents and patent to carry out optimum organization (U.S. Patent number, 4658892) for the several characteristic parameter of pipe inner tooth type.Along with people's being extensive use of to the further demand of intraductal heat exchange reinforcing degree and mix refrigerant, the exchange capability of heat of conventional heat-transfer pipe can not satisfy people's requirement, and particularly the heat exchange property of conventional heat-transfer pipe descends more in the heat exchanger that adopts mix refrigerant.It is found that, adopt the female screw heat-transfer pipe (being called three-dimensional micro-rib pipe again) of discontinuous tooth in the pipe to have than the better heat exchange property of conventional heat-transfer pipe.But because three-dimensional micro-rib pipe commonly used at present when improving heat exchange property, has brought the negative effect that increases flow resistance again inevitably, this has offset the benefit that adopts efficient heat conducting tube to bring to a certain extent.
Three, summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of heat transfer property that can improve phase-change heat-exchange in refrigeration and the air-conditioning equipment that uses single and mix refrigerant is provided, reduce the flow resistance in the pipe, reduce to freeze and the volume of air-conditioning equipment, reduce the female screw heat-transfer pipe of product cost.
For achieving the above object, the technical solution used in the present invention is: the heat-transfer pipe inner surface be provided be the different spiral master tooth 1 of equally distributed height periodically and spiral master tooth 1 ', spiral master tooth 1 and spiral master tooth 1 ' with the angle β of the tubular axis of heat-transfer pipe be 0～18 degree, the tooth depth Ht of spiral master tooth 1 is 0.10～0.3mm, and spiral master tooth 1 and spiral master tooth 1 ' the ratio Ht/Hb of height be 1: 0.4～0.95, top at spiral master tooth 1 offers evenly distributed groove 3, the equal in length of the attached tooth 4 of projection that forms on the length of groove 3 and the spiral master tooth 1 that is disconnected.
Spiral master tooth 1 of the present invention and spiral master tooth 1 ' the circumferential number of teeth be 40～70; The length of groove and attached tooth is 0.3～0.6mm; Spiral master tooth 1 and spiral master tooth 1 ' addendum angle α be 30～50 the degree; Angle theta between attached tooth and the spiral master tooth is 0～20 degree; The tooth depth of attached tooth is 0.02～0.08mm.
Since the spiral master tooth in the heat-transfer pipe of the present invention adopt high tooth and low tooth straggly have to arrangement mode, help strengthening disturbance to boiling and condensation heat transfer, thereby attenuate thermal boundary layer effectively, the angle of velocity and thermograde vector is reduced, velocity field and temperature gradient field are coordinated more, thus make condense and boiling heat transfer strengthened.
Four, description of drawings
Fig. 1 is the cross-sectional view of female screw heat-transfer pipe of the present invention;
Fig. 2 is the profilograph of female screw heat-transfer pipe of the present invention;
Fig. 3 is the argument structure figure of female screw heat-transfer pipe of the present invention.
Five, the specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.
Referring to Fig. 1, the present invention the heat-transfer pipe inner face be provided with 40～70 be the different spiral master tooth 1 of equally distributed height periodically and spiral master tooth 1 ', the high Ht of rib of this spiral master tooth 1 is 0.15～0.3mm, and spiral master tooth 1 and spiral master tooth 1 ' the ratio Ht/Hb of height be 1: 0.4～0.95, for room air conditioner 9.52mm heat-transfer pipe commonly used, tooth depth is preferably 0.20～0.27mm, the number of teeth of spiral master tooth is preferably 50～70, for room air conditioner 7mm heat-transfer pipe commonly used, tooth depth is preferably 0.10～0.24mm, the number of teeth of spiral master tooth is preferably 40～60, top at spiral master tooth 1 offers evenly distributed groove 3, the equal in length of the attached tooth 4 of projection that forms on the length of groove 3 and the spiral master tooth 1 that is disconnected, the length of this groove 3 is 0.3～0.6mm, and the height of this attached tooth 4 is 0.02～0.08mm.
Referring to Fig. 2, spiral master tooth 1 of the present invention and spiral master tooth 1 ' and heat-transfer pipe axis 2 between angle be that helixangle is 0～18 degree, spiral master tooth 1 and spiral master tooth 1 ' with angle theta between the attached tooth 4 be 0～20 to spend.
Referring to Fig. 3, the rib apex angle of spiral master tooth is 30～50 degree in the present invention.
The present invention be carry out under synergistic principle on the scene instructs (Guo Z.Y.et al.A novelconcept for convective heat transfer enhancement, Int.J.Heat MassTransfer, 1998, vol.41, pp2221-2225).The field synergistic principle is united existing three mechanism of strengthening heat convections in theory.By a synergistic principle, the reinforcing degree of heat convection is relevant with size and these three factors of angle of the two of the size of velocity, thermograde vector.The number of teeth of main tooth is very few in the heat-transfer pipe, and internal tooth is not obvious to the perturbation action of cold-producing medium, and the internal tooth heat exchange area reduces; The main tooth number of teeth is too much, though the internal tooth wet length increases, heat exchange area increases, and the between cog area of section reduces, and the cold-producing medium liquid film is thickened, and the cold-producing medium liquid film increases the angle of velocity and thermograde vector in the between cog flow difficulties, is unfavorable for intraductal heat exchange.So, heat-transfer pipe for a certain yardstick, a best range of numbers of teeth is arranged, the present invention heat-transfer pipe circumferentially evenly distributed have the different spiral master tooth 1 of 40～70 height and spiral master tooth 1 ', the rib height of this spiral master tooth 1 is 0.10～0.3mm, and spiral master tooth 1 and spiral master tooth 1 ' the ratio of height be 1: 0.4～0.95, the rib apex angle of spiral master tooth is 30～50 degree.For room air conditioner 9.52mm heat-transfer pipe commonly used, tooth depth is preferably 0.20～0.27mm, the number of teeth of spiral master tooth is preferably 50～70, for room air conditioner 7mm heat-transfer pipe commonly used, tooth depth is preferably 0.10～0.24mm, the number of teeth of spiral master tooth is preferably 40～60, since the spiral master tooth in the heat-transfer pipe adopt high tooth and low tooth straggly have to arrangement mode, both helped strengthening disturbance to boiling and condensation heat transfer, can reduce flow resistance again, thereby attenuate thermal boundary layer effectively, the angle of velocity and thermograde vector is reduced (even velocity field and temperature gradient field are coordinated more), thus make condense and boiling heat transfer strengthened; Main tooth is taked the tooth depth higher slightly than the internal tooth of common heat-transfer pipe, the between cog area of section is increased, can draw thin liquid film better, the internal tooth heat exchange area also can increase, because heat-transfer pipe of the present invention has adopted less helical angle, so the flow resistance in managing generally is less.
Spiral master tooth 1 of the present invention and spiral master tooth 1 ' and heat-transfer pipe axis 2 between angle be helixangle be 0～18 the degree, under the mass velocity of the common cold-producing medium of room air conditioner, take helical angle can significantly reduce the flow resistance of cold-producing medium in pipe less than 10 °.The concrete enhanced heat exchange mechanism of heat-transfer pipe of the present invention is: the top at spiral master tooth 1 offers evenly distributed groove 3, the equal in length of the attached tooth 4 of projection that forms on the length of groove 3 and the spiral master tooth 1 that is disconnected, the length of this groove 3 is 0.3～0.6mm, the height of this attached tooth 4. is 0.02～0.08mm, spiral master tooth 1 and spiral master tooth 1 ' and attached tooth 4 between angle theta be 0～20 the degree.
When cold-producing medium condenses in pipe, can make the tooth top of spiral master tooth 1 and tooth rim to the liquid film that condenses be subjected to the thin effect of drawing of four wall directions and make the reduced thickness of the liquid film that condenses; And when cold-producing medium during at in-tube evaporation, fine attached tooth 4 can increase the nucleus of boiling, thereby plays the effect that promotes nucleate boiling.In addition, when refrigerant vapour or the liquid film that condenses are introduced into spiral master tooth 1 and 1 ' time of spiral master tooth, because the existence of attached tooth 3 is arranged on the spiral master tooth 1, thermal boundary layer and concentration boundary layer are disconnected, front end at attached tooth 3 forms new thermal boundary layer and concentration boundary layer again, so on the whole with regard to attenuate the thickness of thermal boundary layer and concentration boundary layer, make and condense and boiling heat transfer is strengthened.
Claims (6)
1, a kind of female screw heat-transfer pipe, it is characterized in that: be provided with at the heat-transfer pipe inner surface and be periodically different spiral master tooth [1] and the spiral master teeth [1 '] of equally distributed height, spiral master tooth [1] and spiral master tooth [1 '] are 0～18 degree with the angle β of the tubular axis [2] of heat-transfer pipe, the tooth depth Ht of spiral master tooth [1] is 0.10～0.3mm, and spiral master tooth [1] is 1: 0.4～0.95 with the ratio Ht/Hb of the height of spiral master tooth [1 '], offer evenly distributed groove [3] on the top of spiral master tooth [1], the length of groove [3] and the spiral master tooth [1] that is disconnected are gone up the equal in length of the attached tooth of projection [4] that forms.
2, female screw heat-transfer pipe according to claim 1 is characterized in that: the circumferential number of teeth of said spiral master tooth [1] and spiral master tooth [1 '] is 40～70.
3, female screw heat-transfer pipe according to claim 1 is characterized in that: the length of said groove [3] and attached tooth [4] is 0.3～0.6mm.
4, female screw heat-transfer pipe according to claim 1 is characterized in that: the addendum angle α of said spiral master tooth [1] and spiral master tooth [1 '] is 30～50 degree.
5, female screw heat-transfer pipe according to claim 1 is characterized in that: the angle theta between said attached tooth [4] and spiral master tooth [1] and the spiral master tooth [1 '] is 0～20 degree.
6, female screw heat-transfer pipe according to claim 1 is characterized in that: the tooth depth of said attached tooth [4] is 0.02～0.08mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139462 CN1200243C (en) | 2002-10-11 | 2002-10-11 | Internal thread heat-transferring pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139462 CN1200243C (en) | 2002-10-11 | 2002-10-11 | Internal thread heat-transferring pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403779A true CN1403779A (en) | 2003-03-19 |
| CN1200243C CN1200243C (en) | 2005-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02139462 Expired - Fee Related CN1200243C (en) | 2002-10-11 | 2002-10-11 | Internal thread heat-transferring pipe |
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| Country | Link |
|---|---|
| CN (1) | CN1200243C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1898520B (en) * | 2003-10-23 | 2012-06-13 | 沃尔弗林管子公司 | Method and tool for making enhanced heat transfer surfaces |
| CN103591828A (en) * | 2013-10-16 | 2014-02-19 | 中北大学 | Heat exchanger with internal finned tubes |
| CN104019689A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger allowing flow velocity to be controlled automatically |
| CN104019492A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger with height of inner fins changing in flowing direction |
| CN104019688A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Aluminum alloy heat exchanger |
| CN104019491A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger preventing layer shedding |
| CN104101242A (en) * | 2013-10-16 | 2014-10-15 | 中北大学 | Heat exchanger with header with gradually-changed flow area |
| CN104101247A (en) * | 2013-10-16 | 2014-10-15 | 中北大学 | Heat exchanger free from fins outside base tubes |
| CN108050580A (en) * | 2017-12-24 | 2018-05-18 | 黑龙江聚拢华玺智能科技有限公司 | A kind of high-efficiency radiator |
| CN108050579A (en) * | 2017-12-23 | 2018-05-18 | 黑龙江聚拢华玺智能科技有限公司 | A kind of low temp heating radiator |
| CN111256211A (en) * | 2020-01-20 | 2020-06-09 | 海信（山东）空调有限公司 | Air conditioner |
-
2002
- 2002-10-11 CN CN 02139462 patent/CN1200243C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1898520B (en) * | 2003-10-23 | 2012-06-13 | 沃尔弗林管子公司 | Method and tool for making enhanced heat transfer surfaces |
| CN104019492B (en) * | 2013-10-16 | 2015-06-03 | 中北大学 | Heat exchanger with height of inner fins changing in flowing direction |
| CN104019689B (en) * | 2013-10-16 | 2015-06-03 | 中北大学 | Heat exchanger allowing flow velocity to be controlled automatically |
| CN104019689A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger allowing flow velocity to be controlled automatically |
| CN104019492A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger with height of inner fins changing in flowing direction |
| CN104019688A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Aluminum alloy heat exchanger |
| CN104019491A (en) * | 2013-10-16 | 2014-09-03 | 中北大学 | Heat exchanger preventing layer shedding |
| CN104089500A (en) * | 2013-10-16 | 2014-10-08 | 中北大学 | Heat exchanger partially covered with fins |
| CN104019688B (en) * | 2013-10-16 | 2015-06-03 | 中北大学 | Aluminum alloy heat exchanger |
| CN104101247A (en) * | 2013-10-16 | 2014-10-15 | 中北大学 | Heat exchanger free from fins outside base tubes |
| CN103591828A (en) * | 2013-10-16 | 2014-02-19 | 中北大学 | Heat exchanger with internal finned tubes |
| CN104101242A (en) * | 2013-10-16 | 2014-10-15 | 中北大学 | Heat exchanger with header with gradually-changed flow area |
| CN104101242B (en) * | 2013-10-16 | 2015-06-03 | 中北大学 | Heat exchanger with header with gradually-changed flow area |
| CN104019491B (en) * | 2013-10-16 | 2015-06-03 | 中北大学 | Heat exchanger preventing layer shedding |
| CN103591828B (en) * | 2013-10-16 | 2014-06-18 | 中北大学 | Heat exchanger with internal finned tubes |
| CN104101247B (en) * | 2013-10-16 | 2015-06-10 | 中北大学 | Heat exchanger free from fins outside base tubes |
| CN104089500B (en) * | 2013-10-16 | 2015-09-02 | 中北大学 | A kind of part covers the heat exchanger of fin |
| CN108050579A (en) * | 2017-12-23 | 2018-05-18 | 黑龙江聚拢华玺智能科技有限公司 | A kind of low temp heating radiator |
| CN108050580A (en) * | 2017-12-24 | 2018-05-18 | 黑龙江聚拢华玺智能科技有限公司 | A kind of high-efficiency radiator |
| CN111256211A (en) * | 2020-01-20 | 2020-06-09 | 海信（山东）空调有限公司 | Air conditioner |
| CN111256211B (en) * | 2020-01-20 | 2021-11-26 | 海信（山东）空调有限公司 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200243C (en) | 2005-05-04 |
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Granted publication date: 20050504 Termination date: 20121011 |