CN100458348C - Efficient heat-exchanging pipe of evaporator for electric refrigerator set - Google Patents
Efficient heat-exchanging pipe of evaporator for electric refrigerator set Download PDFInfo
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- CN100458348C CN100458348C CNB2005101346313A CN200510134631A CN100458348C CN 100458348 C CN100458348 C CN 100458348C CN B2005101346313 A CNB2005101346313 A CN B2005101346313A CN 200510134631 A CN200510134631 A CN 200510134631A CN 100458348 C CN100458348 C CN 100458348C
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- Prior art keywords
- internal tooth
- evaporator
- fin
- electric refrigerator
- efficient heat
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- 210000000515 tooth Anatomy 0.000 claims description 52
- 238000012546 transfer Methods 0.000 description 19
- 238000005057 refrigeration Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A high-efficiency heat-exchange tube for evaporators of electric refrigerating units comprises a fin part with external disposed fins. On the inside surface of the heat-exchange tube are disposed at least eight pieces of primary internal teeth and at least eight pieces of secondary internal teeth. The above primary internal teeth and the secondary internal teeth are crossed each other.
Description
Technical field
The present invention relates to a kind of evaporating heat-exchanging pipe, relate in particular to a kind of heat exchanger tube that is used for evaporator for electric refrigerator set.
Background technology
The air conditioner refrigerating technology with development of science and technology, has had very big change and progress at set structure, performance and pattern everyway since coming out.And as the refrigeration machine core component---the evaporimeter of one of " two devices ", with the continuous progress of refrigeration, air-conditioning technical, the heat exchanger tube of one of its core component also to be had higher requirement, small-sized, thin-walled, light weight, high efficiency are main flows.With the appearance of various efficient pipes, the performance of refrigeration machine has obtained very big progress.Present heat exchanger tube generally all is to be chilled water in the pipe for cold-producing medium, pipe are outer, cold-producing medium in pipe by the tube wall suction pipe outside the refrigerant heat evaporate, thereby make the refrigerant temperature reduction reach refrigeration.And existing various functionally similar heat-transfer pipe, though all done a lot of work outside on the wing, for example adopt the outer wing of triangle, trapezoidal outer wing etc., but heat exchanger tube is only limiting to low wing bar number, low internal tooth aspect the interior wing, thereby the heat exchanger effectiveness of existing electricity refrigeration heat-transfer pipe internal refrigeration storage agent can not get improving always.Mainly there is following defective in existing refrigerator with heat exchanger tube: 1) heat exchanger tube is loaded onto a large amount of blade (being thin slice shape fin) to increase area of dissipation on normal optical face copper pipe, but the assembling fin not only increases cost on heat exchanger tube, and increased the overall weight of heat exchanger tube, and because fins set installs to and has thermal resistance on the heat exchanger tube, can not carry out heat exchange effectively, therefore can not reduce the temperature of working media in the heat exchanger tube apace; 2) processing slightly is trapezoidal fin on the outer surface of heat exchanger tube, and on the fin top surface, offer groove, increased area of dissipation though have the trapezoidal fin of groove, but when the groove of following of condensing agent to fin, promptly can accumulate in the groove long-pending full until groove, therefore difficult in tube-surface formation thin layer heat exchange membranes, reduce the rate of heat exchange of pipe; 3) inner surface of heat exchanger tube generally can be set to light pipe to reduce the possibility that dirt focuses on pipe internal surface, perhaps be provided with at the internal gear that less number is set on the inner surface or on inner surface low profile of tooth internal tooth with extremely low tooth depth (as adopt usually for interior tooth depth be 0.15～0.18mm), therefore the contact area of pipe internal surface and tube refrigerant is little, and rate of heat exchange is also lower.
Therefore be necessary research, propose to improve the electric refrigerating machine refrigeration performance, be exclusively used in the heat exchanger tube that the electric refrigerating machine evaporimeter is used the heat exchanger tube and the moulding process thereof of electric refrigerating machine.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of heat exchanger tube that increases heat transfer efficiency between cold-producing medium and the heat exchanger tube.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: efficient heat-exchanging pipe of evaporator for electric refrigerator set of the present invention, comprise that outer setting has the fin portion of single-screw fin, at least eight internal tooths of the inner surface setting of described heat exchanger tube and at least eight secondary internal tooths, a described internal tooth intersects mutually with the secondary internal tooth; The high scope of the wing of described fin is 0.3-0.4mm, and the wing wide region is 0.2-0.4mm.
Preferably, the number range of single-screw fin is a 19-40/inch, and the helical angle scope of fin is 1 °-1.5 °.
Preferably, the number range of a described internal tooth and secondary internal tooth is the 70-80 bar respectively.
Preferably, tooth depth scope at least a in a described internal tooth and the secondary internal tooth is 0.30-0.35mm, and the helical angle scope is 16 °-20 °.
Preferably, at least a in a described internal tooth and the secondary internal tooth is internal serration, and the addendum angle scope of this internal serration is 50 °-65 °.
Preferably, a described internal tooth, the secondary internal tooth is cross one another is shaped as " X " shape.
Preferably, heat exchanger tube also includes the secondary groove that above-mentioned fin is separated into independent part along pipe Zhou Fangxiang.
Preferably, the wing bottom width scope between described every adjacent two fins is 0.55-0.75mm, and the groove depth scope of described secondary groove is 0.2-0.3mm.
Preferably, the cross sectional shape of described fin is trapezoidal.
Compared with prior art, the present invention has following technological merit: the inner surface of heat exchanger tube of the present invention is provided with the high internal tooth of many chiasma types, with enhanced tube inner refrigerant flow-disturbing fluidised form, attenuate temperature boundary layer, increase cold-producing medium and heat-transfer pipe heat exchange area, thereby raising heat exchange, and this intersection is about twice flow-disturbing of " X " type internal tooth, make cold-producing medium and heat-transfer pipe heat exchange fully, thoroughly, refrigeration performance is significantly improved; Outer wing on the heat exchange pipe external surface is given prominence to intermittent type trapezium structure wing, can reach and increase heat exchange area abundant flow-disturbing again, pipe outer chilled water and heat-transfer pipe can well be soaked into, chilled water can finish rapidly and heat-transfer pipe between heat exchange, thereby the raising evaporimeter thermal efficiency; The staggered form X type class triangle internal tooth of trapezoidal wing of the intermittent type of outer surface and inner surface, can effectively decompose system pressure from surfaces externally and internally, make that heat-transfer pipe withstand voltage properties under the same conditions significantly improves, anti-fatigue performance significantly strengthens, under the frequent pressure of system changes, unlikely distortion or leakage, improve service life; And owing to withstand voltage and anti-fatigue performance significantly strengthen, it is very thin that tube wall can be done, so heat exchanger tube of the present invention more can adapt to the variation of thermal environment in like product, heat-transfer pipe is with the variation of heat transfer environment, the little contraction of self can be so that the dirt that causes because of chilled water impurity attached to the heat-transfer pipe outside comes off voluntarily because of the different of coefficient of strain with little expansion, thereby have certain self-cleaning performance, can not produce therefore that dirt depends on pipe internal surface too much and the phenomenon that produces obstruction.
Description of drawings
Fig. 1 is a heat exchanger tube partial schematic sectional view of the present invention.
Fig. 2 is the enlarged drawing of A part among Fig. 1.
Fig. 3 be among Fig. 1 B to partial enlarged drawing.
The specific embodiment
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is described in detail.
Please refer to shown in Figure 1, heat exchanger tube 100 of the present invention comprises that the polished rod portion that is positioned at heat exchanger tube 100 two ends (is the part that light pipe is not done processing, not shown), the transition part (promptly being formed with the part of imperfect fin, not label) between the fin portion 3 at the band fin 31 between the two polished rod portions, polished rod portion and the fin portion 3, the internal tooth 33 that is arranged at pipe internal surface and secondary internal tooth 34.Preferably, heat exchanger tube of the present invention 100 is made by copper product.
Preferably, a described internal tooth 33 and secondary internal tooth 34 all have the triangular structure of being similar to, but and equal rounding off at the bottom of the wing of a described internal tooth 33 and secondary internal tooth 34 top and the wing, and a described internal tooth 33 forms mutually with secondary internal tooth 34 has chiasma type, preferably, the shape of described staggered form can be an X-shaped.
Please refer to shown in Figure 2, the scope of the tooth depth Rh1 of a described internal tooth 33 is to be 0.30～0.35mm, bar is counted N1 and is at least 8, and preferred N1 scope is 70～80, and helixangle 1 scope is 16～20 degree, addendum angle θ 1 scope is 50～65 degree, the scope of the tooth depth Rh2 of described secondary internal tooth 34 is 0.30～0.35mm, and bar is counted N2 and is at least 8, and preferred N2 scope is 70～80, the scope of helixangle 2 is 16～20 degree, and the scope of addendum angle θ 2 is 50～65 degree.Internal tooth 33 of described chiasma type, secondary internal tooth 34 also make the flow-disturbing of heat-transfer pipe 100 inner refrigerants through carrying out intersecting for twice behind internal tooth 33 and the secondary internal tooth 34 when increasing the heat exchange surface area of heat-transfer pipe 100 inner surfaces and wherein cold-producing medium.Because a flow-disturbing of the cold-producing medium effect in 33 pairs of pipes of an internal tooth increases a flow-disturbing degree, reduce temperature boundary layer, reduce thermal resistance and improve the coefficient of heat transfer, and the second-disturbing flow of the cold-producing medium effect in 34 pairs of pipes of secondary internal tooth can further increase fluid flow-disturbing degree, temperature boundary layer is further reduced or approach theoretic disappearance, make thermal resistance extremely low and significantly improve the coefficient of heat transfer, thereby heat transfer efficiency strengthens greatly between cold-producing medium and the heat-transfer pipe, and the complete machine heat exchange property improves greatly.Preferably, the number of above-mentioned N1, N2 is respectively 76.
Please refer to Fig. 1, shown in Figure 3, described fin 31 is the single-screw fin, and also offers secondary groove 32 on the fin 31, and described secondary groove 32 is separated to form independently fin with fin 31.Preferably, the cross sectional shape of described fin 31 is trapezoidal.The outer diameter D scope of described fin portion 3 is 12-16mm, and wall thickness T f scope is 0.45-0.6mm.
The helical angle scope of described single-screw fin 31 is 1～1.5 °, and the scope of pitch of fin FPI is 19～40/inch, and the scope of the high Fh1 of wing is 0.3-0.4mm, and the wing wide region is 0.2～0.4mm, and the scope of the wide W1 of bottom land is between 0.55～0.75mm.Described secondary groove 32 is to be opened on the fin 31 and with fin 31 along pipe Zhou Fangxiang to be divided into independently individuality, described secondary groove 32 also can be called the secondary fin that forms on the outer surface, the scope of the number N 2 of described secondary groove 32 is 80-120, and the groove depth Fh2 scope of secondary groove 32 is 0.20～0.30mm.The outer surface of described heat exchanger tube 100 is formed the outer wing type structure of intermittent type trapezoidal shape by fin 31 and secondary groove 32.Because fin 31 pitch FPI are between 19～40/inch, the number N 2 of secondary groove 32 is between 80-120, described fin 31 rationally mates with the number of secondary groove 32, make the chilled water in heat exchanger tube 100 outsides can spread all over the outer surface of heat exchanger tube rapidly, so heat exchanger tube outside chilled water and heat exchange pipe external surface can soak into well, help increasing heat transfer property, improve the heat transfer efficiency of evaporimeter.
Because the outer surface of heat exchanger tube 100 is provided with fin 31 and fin 31 is separated into the secondary groove 32 of some independent fins, so help forming liquid film, accelerate the evaporation rate of liquid film, improve the heat exchange efficiency of heat exchanger tube at the outer surface of heat exchanger tube 100.Reason is as follows: when the lithium bromide coolant solution drops onto the outer surface of heat exchanger tube 100, because the hydrophilic interaction on surface, drop forms liquid film along the helicla flute of the first helical angle B1 direction, groove width W2, the second helical angle B2 and the wide W1 of wing bottom land of secondary groove 32 to rapid expansion all around.Preferably, fin 31 has trapezoidal shape, and secondary groove 32 is shaped as the handstand trapezoidal shape, therefore helps the quick formation of liquid film.
The present invention slightly is trapezoidal with the cross sectional shape of fin 31, and on trapezoidal fin 31, open secondary groove 32 and describe for example, the cross section of certain fin of the present invention 31 can also be other shapes, as triangle, rectangle etc., as long as the wide W3 of wing of fin 31 and the ratio range of the wide W1 of fin slot bottom are 0.25-0.38.
In addition, because the working media in the heat exchanger tube 100 is a chilled water, when the water quality dirt is attached to the inside pipe wall surface, the differentially expanding contraction that causes owing to heat exchanger tube 100 self heat, make that dirt is different with the contraction difference of heat exchanger tube 100 and dirt is come off from the inner surface of heat exchanger tube 100, therefore described heat exchanger tube has good automatically cleaning characteristic.
The above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (9)
1. efficient heat-exchanging pipe of evaporator for electric refrigerator set, comprise that outer setting has the fin portion of single-screw fin, it is characterized in that: at least eight internal tooths of the inner surface setting of described heat exchanger tube and at least eight secondary internal tooths, a described internal tooth intersects mutually with the secondary internal tooth; The high scope of the wing of described fin is 0.3-0.4mm, and the wing wide region is 0.2-0.4mm.
2. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: the number range of single-screw fin is a 19-40/inch, and the helical angle scope is 1 °-1.5 °.
3. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: the number range of a described internal tooth and secondary internal tooth is the 70-80 bar respectively.
4. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: tooth depth scope at least a in a described internal tooth and the secondary internal tooth is 0.30-0.35mm, and the helical angle scope is 16 °-20 °.
5. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: at least a in a described internal tooth and the secondary internal tooth is internal serration, and the addendum angle scope of this internal serration is 50 °-65 °.
6. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: a described internal tooth, the secondary internal tooth is cross one another is shaped as " X " shape.
7. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 1 is characterized in that: heat exchanger tube also includes the secondary groove that above-mentioned fin is separated into independent part along pipe Zhou Fangxiang.
8. efficient heat-exchanging pipe of evaporator for electric refrigerator set as claimed in claim 7 is characterized in that: the wing bottom width scope between described every adjacent two fins is 0.55-0.75mm, and the groove depth scope of described secondary groove is 0.2-0.3mm.
9. as each described efficient heat-exchanging pipe of evaporator for electric refrigerator set among the claim 1-8, it is characterized in that: the cross sectional shape of described fin is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101346313A CN100458348C (en) | 2005-12-13 | 2005-12-13 | Efficient heat-exchanging pipe of evaporator for electric refrigerator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101346313A CN100458348C (en) | 2005-12-13 | 2005-12-13 | Efficient heat-exchanging pipe of evaporator for electric refrigerator set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1982831A CN1982831A (en) | 2007-06-20 |
| CN100458348C true CN100458348C (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101346313A Active CN100458348C (en) | 2005-12-13 | 2005-12-13 | Efficient heat-exchanging pipe of evaporator for electric refrigerator set |
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| Country | Link |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556124B (en) * | 2009-04-10 | 2011-11-16 | 金龙精密铜管集团股份有限公司 | Heat transfer tube |
| CN103644756B (en) * | 2013-12-05 | 2016-01-20 | 江苏大学 | A kind of heat exchanger tube |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253459Y (en) * | 1996-04-11 | 1997-04-30 | 济南市长清压力容器厂 | Double screwed pipe heat exchanger |
| CN2548109Y (en) * | 2002-06-06 | 2003-04-30 | 中国科学院精密铜管工程研究中心 | Cross-tooth internal thread seamless high-efficiency heat transfer pipe |
| CN2572324Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat exchanging pipe for evaporator |
| CN2674388Y (en) * | 2003-12-05 | 2005-01-26 | 无锡市隆达铜业有限公司 | Special-shape internal screw metal pipe for radiator |
-
2005
- 2005-12-13 CN CNB2005101346313A patent/CN100458348C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2253459Y (en) * | 1996-04-11 | 1997-04-30 | 济南市长清压力容器厂 | Double screwed pipe heat exchanger |
| CN2548109Y (en) * | 2002-06-06 | 2003-04-30 | 中国科学院精密铜管工程研究中心 | Cross-tooth internal thread seamless high-efficiency heat transfer pipe |
| CN2572324Y (en) * | 2002-09-28 | 2003-09-10 | 江苏萃隆铜业有限公司 | Heat exchanging pipe for evaporator |
| CN2674388Y (en) * | 2003-12-05 | 2005-01-26 | 无锡市隆达铜业有限公司 | Special-shape internal screw metal pipe for radiator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1982831A (en) | 2007-06-20 |
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| C14 | Grant of patent or utility model | ||
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Denomination of invention: Efficient heat-exchanging pipe of evaporator for electric refrigerator set Effective date of registration: 20171215 Granted publication date: 20090204 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Wuxi Golden Dragon Kawamura Precision Tube Co., Ltd.|Chongqing Longyu Precision Copper Tube Co., Ltd.|Henan Longhui Copper Industry Co., Ltd.|Xinxiang Jinxiang Precision Pipe Fittings Co., Ltd.|Xinxiang Longteng Refrigeration Technology Co.,Ltd.|Jiangsu Canghuan Copper Industry Co.,Ltd.|Jinlong Precision Copper Pipe Group Co., Ltd.|Guangdong Longfeng Precise Copper Tube Co., Ltd. Registration number: 2017990001045 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 404000 588 Airport Road, Wanzhou District, Chongqing (Wanzhou Economic Development Zone) Patentee after: Jinlong Precision Copper Pipe Group Co., Ltd. Address before: 453000 No. 191 Renmin West Road, Henan, Xinxiang Patentee before: Jinlong Precision Copper Pipe Group Co., Ltd. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Date of cancellation: 20190814 Granted publication date: 20090204 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Jinlong Precision Copper Pipe Group Co., Ltd. Registration number: 2017990001045 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Efficient heat-exchanging pipe of evaporator for electric refrigerator set Effective date of registration: 20190830 Granted publication date: 20090204 Pledgee: China Minsheng Banking Corp Zhengzhou branch Pledgor: Jinlong Precision Copper Pipe Group Co., Ltd. Registration number: Y2019990000127 |