CN103225933B - Become profile of tooth internal thread enhanced tube evaporimeter - Google Patents
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- CN103225933B CN103225933B CN201310120743.8A CN201310120743A CN103225933B CN 103225933 B CN103225933 B CN 103225933B CN 201310120743 A CN201310120743 A CN 201310120743A CN 103225933 B CN103225933 B CN 103225933B
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Abstract
The present invention relates to and a kind of become profile of tooth internal thread enhanced tube evaporimeter, feature is the fin comprising the first paragraph pipe of more than two, the second segment pipe of more than two, the connecting bend of more than three and more than two; Evenly be provided with the tooth bar of more than three in the axis of described first paragraph inside pipe wall, tooth bar is in spiral distribution; The length of second segment pipe is identical with the length of first paragraph pipe, and be evenly provided with the tooth bar of more than three in the axis of second segment inside pipe wall, tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe and the tooth bar number of second segment pipe is 0.7-1, and the ratio range of the gear rack helix angle of first paragraph pipe and the gear rack helix angle of second segment pipe is 1-2; By flow of refrigerant direction connecting bend, adjacent each section of pipe is communicated with; Every sheet fin is set on all first paragraph pipes and second segment pipe.Its advantage is: cold-producing medium is in the whole heat transfer process of evaporimeter, and different cold-producing medium mass dryness fraction scope adopts the thermoexcell of dissimilar tooth form, makes the overall heat exchange best results of evaporimeter, thus improves performance of refrigerant systems.
Description
Technical field
Patent of the present invention relates to a kind of refrigeration system enhanced heat exchange technology, especially the change profile of tooth internal thread enhanced tube evaporimeter of air-conditioner evaporator enhanced heat exchange technology.
Background technology
Evaporimeter is one of critical component of refrigeration system, larger on the impact of refrigeration plant overall performance.For improving evaporator heat exchange effect, reduce its material consumption, inner screw thread copper pipe is widely used in refrigeration plant evaporimeter.For improving heat transfer effect, each inner screw thread copper pipe manufacturing enterprise develops the inner screw thread copper pipe of multiple profile of tooth, but a general principle is exactly increase intraductal heat exchange area, the turbulent flow of reinforced pipe inner refrigerant and the heat transfer resistance of reduction liquid.In same evaporimeter, all adopt the inner screw thread copper pipe of same profile of tooth at present, the profile of tooth of its inner screw thread copper pipe is based on cold-producing medium boiling heat transfer strengthening mechanism design in evaporimeter.But in fact, the heat transfer process of cold-producing medium in evaporimeter is a heat transfer process from saturated liquid to superheated steam, the mass dryness fraction of cold-producing medium in evaporimeter progressively becomes 1 from 0, at evaporimeter leading portion and low mass dryness fraction section refrigerant liquid large percentage, the major measure of internal thread enhanced tube enhanced heat exchange is adopted to be increase cold-producing medium rotary speed, form good Gregoring effect, therefore suitably helical angle can be increased, tooth bottom width degree can be increased additionally by minimizing tooth bar number, also be conducive to reducing refrigerant liquid heat transfer resistance.And be also high mass dryness fraction section refrigerant gas large percentage at evaporimeter back segment, adopt the major measure of internal thread enhanced tube enhanced heat exchange to be increase heat exchange area, minimizing flow of refrigerant dynamic resistance, therefore suitably can increase tooth bar number, reduce the anglec of rotation.Therefore adopt the internal thread thermoexcell of dissimilar tooth form according to cold-producing medium in the different mass dryness fraction stages of evaporimeter, the heat transfer effect of evaporimeter the best can be realized.
Summary of the invention
The object of this invention is to provide a kind of change profile of tooth internal thread enhanced tube evaporimeter, adopt the internal thread thermoexcell of dissimilar tooth form in the different mass dryness fraction stages of evaporimeter according to cold-producing medium, with the heat transfer effect making whole evaporimeter reach best, thus improve performance of refrigerant systems.
In order to achieve the above object, a kind of technical scheme of the present invention is, it is a kind of change profile of tooth internal thread enhanced tube evaporimeter, it is characterized in that comprising:
The first paragraph pipe of more than two, be evenly provided with the tooth bar of more than three in the axis of described first paragraph inside pipe wall, described tooth bar is in spiral distribution;
The second segment pipe of more than two, the length of second segment pipe is identical with the length of first paragraph pipe, and be evenly provided with the tooth bar of more than three in the axis of second segment inside pipe wall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe and the tooth bar number of second segment pipe is 0.7-5/6, and the ratio range of the gear rack helix angle of first paragraph pipe and the gear rack helix angle of second segment pipe is 5/3-2;
The connecting bend of more than three, is communicated with adjacent each section of pipe by connecting bend described in flow of refrigerant direction; With
The fin of more than two, every sheet fin is set on all first paragraph pipes and second segment pipe.
The radical of described first paragraph pipe and the radical ratio range of second segment pipe are 3/7-7/3.
Described first paragraph pipe is all equal with internal diameter with the external diameter of second segment pipe.
The external diameter of described first paragraph pipe is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of first paragraph pipe is 0.2mm, and tooth bar number is 50, and the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe is 0.2mm, and tooth bar number is 60, and helical angle is 15 °, and addendum angle is 25 °.
In order to achieve the above object, another kind of technical scheme of the present invention is, it is a kind of change profile of tooth internal thread enhanced tube evaporimeter, it is characterized in that comprising:
The first paragraph pipe of more than two, be evenly provided with the tooth bar of more than three in the axis of described first paragraph inside pipe wall, described tooth bar is in spiral distribution;
The second segment pipe of more than two, the length of described second segment pipe is identical with the length of first paragraph pipe, and be evenly provided with the tooth bar of more than three in the axis of second segment inside pipe wall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe and the tooth bar number of second segment pipe is 0.7-0.9, and the ratio range of the gear rack helix angle of first paragraph pipe and the gear rack helix angle of second segment pipe is 1.25-2;
The 3rd section of pipe of more than two, the length of described 3rd section of pipe is identical with the length of second segment pipe, and be evenly provided with the tooth bar of more than three articles in the axis of the 3rd section of inside pipe wall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of the tooth bar number of second segment pipe and the 3rd section of pipe is 0.7-5/6, and the ratio range of the gear rack helix angle of the gear rack helix angle of second segment pipe and the 3rd section of pipe is 4/3-2;
The connecting bend of more than three, is communicated with adjacent each section of pipe by connecting bend described in flow of refrigerant direction; With
The fin of more than two, every sheet fin is set on all first paragraph pipes, second segment pipe and the 3rd section of pipe.
The radical of described first paragraph pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section; The radical of second segment pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section; The radical of the 3rd section of pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section.
The external diameter of described first paragraph pipe, second segment pipe and the 3rd section of pipe is all equal with internal diameter.
The external diameter of described first paragraph pipe 1 is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of first paragraph pipe 1 is 0.2mm, and tooth bar number is 45, and the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe 4 is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe 4 is 0.2mm, and tooth bar number is 50, and helical angle is 20 °, and addendum angle is 25 °.The external diameter of described 3rd section of pipe 5 is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of the 3rd section of pipe 5 is 0.2mm, and tooth bar number is 60, and the helical angle of tooth bar is 15 °, and phase addendum angle is 25 °.
The present invention's advantage is compared with prior art: cold-producing medium is in the whole heat transfer process of evaporimeter, and different cold-producing medium mass dryness fraction scope adopts the thermoexcell of dissimilar tooth form, makes the overall heat exchange best results of evaporimeter, thus improves performance of refrigerant systems.
Accompanying drawing explanation
Fig. 1 is the assembly structure schematic diagram of the embodiment of the present invention one;
Fig. 2 is the axial sectional drawing of the first paragraph pipe of the embodiment of the present invention one;
Fig. 3 is that the partial left of Fig. 2 looks enlarged drawing;
Fig. 4 is the axial sectional drawing of the second segment pipe of the embodiment of the present invention one;
Fig. 5 is that the partial left of Fig. 4 looks enlarged drawing;
Fig. 6 is the assembly structure schematic diagram of the embodiment of the present invention two;
Fig. 7 is the axial sectional drawing of the first paragraph pipe of the embodiment of the present invention two;
Fig. 8 is that the partial left of Fig. 7 looks enlarged drawing;
Fig. 9 is the axial sectional drawing of the second segment pipe of the embodiment of the present invention two;
Figure 10 is that the partial left of Fig. 9 looks enlarged drawing;
Figure 11 is the axial sectional drawing of the 3rd section of pipe of the embodiment of the present invention two;
Figure 12 is that the partial left of Figure 11 looks enlarged drawing.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and in figure, same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In description of the present utility model, term " first ", " second " and " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
embodiment one
As shown in Fig. 1 to 5, it is a kind of change profile of tooth internal thread enhanced tube evaporimeter, comprises the connecting bend 3 of second segment pipe more than 4, three and the fin 2 of more than two of the first paragraph pipe more than 1, two of more than two; Wherein evenly be provided with the tooth bar of more than three in the axis of described first paragraph pipe 1 inwall, described tooth bar is in spiral distribution; The length of described second segment pipe 4 is identical with the length of first paragraph pipe 1, and be evenly provided with the tooth bar of more than three in the axis of second segment pipe 4 inwall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe 1 and the tooth bar number of second segment pipe 4 is 0.7-5/6, the ratio of the tooth bar number of first paragraph pipe 1 and the tooth bar number of second segment pipe 4 is 5/6 in the present embodiment, also can select the ratio of the tooth bar number of first paragraph pipe 1 and the tooth bar number of second segment pipe 4 according to actual needs within the limits prescribed; The ratio range of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 is 5/3-2, the ratio of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 is 5/3 in the present embodiment, also can select the ratio of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 according to actual needs within the limits prescribed; By connecting bend 3 described in flow of refrigerant direction, adjacent each section of pipe is communicated with; Every sheet fin 2 is set in all first paragraph pipes 1 with on second segment pipe 4.
During work, cold-producing medium enters from the entrance of the first paragraph pipe 1 of initial end, flows out from the outlet of the second segment pipe 4 of least significant end; Cold-producing medium evaporates in first paragraph pipe 1, increases along flow of refrigerant direction cold-producing medium mass dryness fraction, then enters in second segment pipe 4 and continues evaporation, and all become refrigerant gas.
The radical of described first paragraph pipe and the radical ratio range of second segment pipe are 3/7-7/3; Be provided with four first paragraph pipes 1 and four second segment pipes 4 in the present embodiment, also can select the radical of first paragraph pipe 1 and second segment pipe 4 according to actual needs within the limits prescribed.
In the present embodiment, described first paragraph pipe 1 is all equal with internal diameter with the external diameter of second segment pipe 4.
In the present embodiment, the external diameter of described first paragraph pipe 1 is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of first paragraph pipe 1 is 0.2mm, and tooth bar number is 50, and the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe 4 is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe 4 is 0.2mm, and tooth bar number is 60, and helical angle is 15 °, and addendum angle is 25 °.
embodiment two
As shown in Fig. 6 to 12, it is a kind of change profile of tooth internal thread enhanced tube evaporimeter, comprises the connecting bend 3 of the 3rd section of pipe more than 5, three and the fin 2 of more than two of the second segment pipe more than 4, two of the first paragraph pipe more than 1, two of more than two; Wherein evenly be provided with the tooth bar of more than three articles in the axis of the inwall of described first paragraph pipe 1, second segment pipe 4 and the 3rd section of pipe 5, described tooth bar is in spiral distribution; The identical length of described first paragraph pipe 1, second segment pipe 4 and the 3rd section of pipe 5 is same.The ratio range of the tooth bar number of described first paragraph pipe 1 and the tooth bar number of second segment pipe 4 is 0.7-0.9, the ratio of the tooth bar number of first paragraph pipe 1 and the tooth bar number of second segment pipe 4 is 9/10 in the present embodiment, also can select the ratio of the tooth bar number of first paragraph pipe 1 and the tooth bar number of second segment pipe 4 according to actual needs within the limits prescribed; The ratio range of the tooth bar number of the tooth bar number of described second segment pipe 4 and the 3rd section of pipe 5 is 0.7-5/6, the ratio of the tooth bar number of second segment pipe 4 and the tooth bar number of the 3rd section of pipe 5 is 5/6 in the present embodiment, also can select the ratio of the tooth bar number of second segment pipe 4 and the tooth bar number of the 3rd section of pipe 5 according to actual needs within the limits prescribed; The ratio range of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 is 1.25-2, the ratio of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 is 5/4 in the present embodiment, also can select the ratio of the gear rack helix angle of first paragraph pipe 1 and the gear rack helix angle of second segment pipe 4 according to actual needs within the limits prescribed; The ratio range of the gear rack helix angle of the gear rack helix angle of second segment pipe 4 and the 3rd section of pipe 5 is 4/3-2, the ratio of the gear rack helix angle of second segment pipe 4 and the gear rack helix angle of the 3rd section of pipe 5 is 4/3 in the present embodiment, also can select the ratio of the gear rack helix angle of second segment pipe 4 and the gear rack helix angle of the 3rd section of pipe 5 according to actual needs within the limits prescribed; By connecting bend 3 described in flow of refrigerant direction, adjacent each section of pipe is communicated with; Every sheet fin 2 is set on all first paragraph pipes 1, second segment pipe 4 and the 3rd pipeline section 5.
During work, cold-producing medium enters from the entrance of the first paragraph pipe 1 of initial end, flows out from the outlet of the 3rd section of pipe 5 of least significant end; Cold-producing medium evaporates in first paragraph pipe 1, increase along flow of refrigerant direction cold-producing medium mass dryness fraction, then enter in second segment pipe 4 and continue evaporation, continue to increase along flow of refrigerant direction cold-producing medium mass dryness fraction, finally enter in the 3rd section of pipe 5 and continue evaporation, and all become refrigerant gas.
The radical of described first paragraph pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section, is 1/4 in the present embodiment; The radical of second segment pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section, is 1/2 in the present embodiment; The radical of the 3rd section of pipe accounts for the 1/10-2/3 of the total radical of whole pipeline section, is 1/4 in the present embodiment.
In the present embodiment, the external diameter of described first paragraph pipe 1, second segment pipe 4 and the 3rd section of pipe 5 is all equal with internal diameter.
In the present embodiment, the external diameter of described first paragraph pipe 1 is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of first paragraph pipe 1 is 0.2mm, and tooth bar number is 45, and the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe 4 is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe 4 is 0.2mm, and tooth bar number is 50, and helical angle is 20 °, and addendum angle is 25 °.The external diameter of described 3rd section of pipe 5 is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of the 3rd section of pipe 5 is 0.2mm, and tooth bar number is 60, and the helical angle of tooth bar is 15 °, and phase addendum angle is 25 °.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and distortion to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (8)
1. become a profile of tooth internal thread enhanced tube evaporimeter, it is characterized in that comprising:
The first paragraph pipe (1) of more than two, be evenly provided with the tooth bar of more than three in the axis of described first paragraph pipe (1) inwall, described tooth bar is in spiral distribution;
The second segment pipe (4) of more than two, the length of described second segment pipe (4) is identical with the length of first paragraph pipe (1), and be evenly provided with the tooth bar of more than three in the axis of second segment pipe (4) inwall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe (1) and the tooth bar number of second segment pipe (4) is 0.7-5/6, and the ratio range of the gear rack helix angle of first paragraph pipe (1) and the gear rack helix angle of second segment pipe (4) is 5/3-2;
The connecting bend (3) of more than three, is communicated with adjacent each section of pipe by connecting bend (3) described in flow of refrigerant direction; With
The fin (2) of more than two, every sheet fin (2) is set in all first paragraph pipes (1) with on second segment pipe (4).
2. change profile of tooth internal thread enhanced tube evaporimeter according to claim 1, is characterized in that the radical of described first paragraph pipe (1) and the radical ratio range of second segment pipe (4) are 3/7-7/3.
3. change profile of tooth internal thread enhanced tube evaporimeter according to claim 1, is characterized in that described first paragraph pipe (1) is all equal with internal diameter with the external diameter of second segment pipe (4).
4. the change profile of tooth internal thread enhanced tube evaporimeter according to any one of claims 1 to 3, the external diameter that it is characterized in that described first paragraph pipe (1) is 7mm, pipe thickness is 0.25mm, the tooth bar height of first paragraph pipe (1) is 0.2mm, tooth bar number is 50, the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe (4) is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe (4) is 0.2mm, and tooth bar number is 60, and helical angle is 15 °, and addendum angle is 25 °.
5. become a profile of tooth internal thread enhanced tube evaporimeter, it is characterized in that comprising:
The first paragraph pipe (1) of more than two, be evenly provided with the tooth bar of more than three in the axis of described first paragraph pipe (1) inwall, described tooth bar is in spiral distribution;
The second segment pipe (4) of more than two, the length of described second segment pipe (4) is identical with the length of first paragraph pipe (1), and be evenly provided with the tooth bar of more than three in the axis of second segment pipe (4) inwall, described tooth bar is in spiral distribution; The ratio range of the tooth bar number of first paragraph pipe (1) and the tooth bar number of second segment pipe (4) is 0.7-0.9, and the ratio range of the gear rack helix angle of first paragraph pipe (1) and the gear rack helix angle of second segment pipe (4) is 1.25-2;
The 3rd section of pipe (5) of more than two, the length of described 3rd section of pipe (5) is identical with the length of second segment pipe (4), and be evenly provided with the tooth bar of more than three articles in the axis of the 3rd section of pipe (5) inwall, described tooth bar is in spiral distribution; The tooth bar number of second segment pipe (4) and the 3rd section of ratio range of managing the tooth bar number of (5) are 0.7-5/6, and the gear rack helix angle of second segment pipe (4) and the 3rd section of ratio range of managing the gear rack helix angle of (5) are 4/3-2;
The connecting bend (3) of more than three, is communicated with adjacent each section of pipe by connecting bend (3) described in flow of refrigerant direction; With
The fin (2) of more than two, every sheet fin (2) is set on all first paragraph pipes (1), second segment pipe (4) and the 3rd section of pipe (5).
6. change profile of tooth internal thread enhanced tube evaporimeter according to claim 5, is characterized in that the radical of described first paragraph pipe (1) accounts for the 1/10-2/3 of the total radical of whole pipeline section; The radical of second segment pipe (4) accounts for the 1/10-2/3 of the total radical of whole pipeline section; The radical of the 3rd section of pipe (5) accounts for the 1/10-2/3 of the total radical of whole pipeline section.
7. change profile of tooth internal thread enhanced tube evaporimeter according to claim 5, is characterized in that described first paragraph pipe (1), second segment pipe (4) and the 3rd section of external diameter of managing (5) are all equal with internal diameter.
8. the change profile of tooth internal thread enhanced tube evaporimeter according to any one of claim 5 to 7, the external diameter that it is characterized in that described first paragraph pipe (1) is 7mm, pipe thickness is 0.25mm, the tooth bar height of first paragraph pipe (1) is 0.2mm, tooth bar number is 45, the helical angle of tooth bar is 25 °, and addendum angle is 25 °; The external diameter of described second segment pipe (4) is 7mm, and pipe thickness is 0.25mm, and the tooth depth of the tooth bar of second segment pipe (4) is 0.2mm, and tooth bar number is 50, and helical angle is 20 °, and addendum angle is 25 °; The external diameter of described 3rd section of pipe (5) is 7mm, and pipe thickness is 0.25mm, and the tooth bar height of the 3rd section of pipe 5 is 0.2mm, and tooth bar number is 60, and the helical angle of tooth bar is 15 °, and phase addendum angle is 25 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120743.8A CN103225933B (en) | 2013-04-09 | 2013-04-09 | Become profile of tooth internal thread enhanced tube evaporimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120743.8A CN103225933B (en) | 2013-04-09 | 2013-04-09 | Become profile of tooth internal thread enhanced tube evaporimeter |
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| CN103225933A CN103225933A (en) | 2013-07-31 |
| CN103225933B true CN103225933B (en) | 2015-08-26 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987539B (en) * | 2015-02-03 | 2018-09-18 | 上海海立电器有限公司 | Air conditioner and its heat exchanger |
| CN106871664A (en) * | 2017-01-09 | 2017-06-20 | 青岛海尔空调电子有限公司 | A kind of heat exchanger, air-conditioning and design of heat exchanger method |
| CN111156745A (en) * | 2020-02-21 | 2020-05-15 | 顺德职业技术学院 | Variable-pipe-diameter composite-tooth-shaped internal thread reinforced pipe evaporator |
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| CN1389702A (en) * | 2002-07-02 | 2003-01-08 | 西安交通大学 | Heat exchanger flow circuit arranging method and device |
| CN201081590Y (en) * | 2007-07-26 | 2008-07-02 | 上海龙阳精密复合铜管有限公司 | Thin-and-high tooth internal thread seamless high-efficiency heat transfer tube |
| CN101482348A (en) * | 2008-11-28 | 2009-07-15 | 滁州扬子必威中央空调有限公司 | Three segment type heat exchanger |
| CN201593893U (en) * | 2009-12-13 | 2010-09-29 | 海信（山东）空调有限公司 | Condenser of outdoor unit of air conditioner and outdoor unit mounted with same |
| CN203249432U (en) * | 2013-04-09 | 2013-10-23 | 顺德职业技术学院 | Variable-tooth-shaped internal thread strengthening tube evaporator |
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2013
- 2013-04-09 CN CN201310120743.8A patent/CN103225933B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1389702A (en) * | 2002-07-02 | 2003-01-08 | 西安交通大学 | Heat exchanger flow circuit arranging method and device |
| CN201081590Y (en) * | 2007-07-26 | 2008-07-02 | 上海龙阳精密复合铜管有限公司 | Thin-and-high tooth internal thread seamless high-efficiency heat transfer tube |
| CN101482348A (en) * | 2008-11-28 | 2009-07-15 | 滁州扬子必威中央空调有限公司 | Three segment type heat exchanger |
| CN201593893U (en) * | 2009-12-13 | 2010-09-29 | 海信（山东）空调有限公司 | Condenser of outdoor unit of air conditioner and outdoor unit mounted with same |
| CN203249432U (en) * | 2013-04-09 | 2013-10-23 | 顺德职业技术学院 | Variable-tooth-shaped internal thread strengthening tube evaporator |
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