CN112944993A - Heat exchange tube, heat exchanger and air conditioner - Google Patents
Heat exchange tube, heat exchanger and air conditioner Download PDFInfo
- Publication number
- CN112944993A CN112944993A CN201911258683.XA CN201911258683A CN112944993A CN 112944993 A CN112944993 A CN 112944993A CN 201911258683 A CN201911258683 A CN 201911258683A CN 112944993 A CN112944993 A CN 112944993A
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- Prior art keywords
- heat exchange
- fin
- exchange tube
- tube body
- tube
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- 230000000712 assembly Effects 0.000 claims abstract description 5
- 238000000429 assembly Methods 0.000 claims abstract description 5
- 239000011800 void material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 35
- 238000001704 evaporation Methods 0.000 abstract description 14
- 230000008020 evaporation Effects 0.000 abstract description 14
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 6
- 239000011552 falling film Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a heat exchange tube, a heat exchanger and an air conditioner, wherein the heat exchange tube comprises: a pipe body; the fin assemblies are spirally distributed on the outer wall of the tube body along the axis of the tube body; the fin component comprises fin roots, the fin roots are connected to the tube body, the tail ends of the fin roots are bent towards one side to form fin base parts, the fin roots and the fin base parts form reverse L-shaped fins, a cavity structure is formed between the reverse L-shaped fins adjacent to each other along the axial direction of the tube body, and gaps are reserved between the reverse L-shaped fins adjacent to each other along the circumferential direction of the tube body; the fin part is provided with a bulge part, and the bulge part forms a cross flow channel on the outer surface of the fin assembly. The heat exchange tube comprises a plurality of cavity structures, and evaporation heat exchange can be enhanced; the outer surface of the fin component is provided with the convex parts, so that the surface roughness of the heat exchange tube is increased, the heat exchange area is increased, meanwhile, the cross flow channels are formed on the outer surface of the heat exchange tube, and redundant refrigerants on the outer surface of the heat exchange tube are guided.
Description
Technical Field
The invention belongs to the technical field of heat exchange, and particularly relates to a heat exchange tube, a heat exchanger and an air conditioner.
Background
In the falling film evaporator, the Freon refrigerant drips from row to row of evaporation tubes, and on one hand, the Freon refrigerant on the evaporation tubes is ensured to have enough quantity to quickly enter cavities on the outer surface, so that the generation of dry spots on part of the surface due to insufficient refrigerant can be prevented; on the other hand, the refrigerant can rapidly extend along the axial direction and the circumferential direction on the outer surface of the tube, so that the refrigerant on the surface of the tube is prevented from being accumulated too much, and meanwhile, the splashing phenomenon is prevented when the upward-discharging refrigerant continuously drops, so that part of the refrigerant can not participate in heat exchange; meanwhile, when the refrigerant drips from top to bottom, the refrigerant in the upper discharge pipe is ensured to just drip above the lower discharge pipe, so that all the refrigerants can exchange heat.
The flooded evaporator tube has smooth surface, can only provide a vaporization core for evaporation, and cannot guide, extend and stop the Freon refrigerant. This means that the unique heat exchange form of falling film evaporation cannot be sufficiently enhanced, and therefore there is an urgent need for a falling film evaporation tube dedicated to falling film evaporators, which can provide the vaporization core required for nucleate boiling and enhance convective heat transfer.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that the existing heat exchange tube has poor heat exchange effect, and provides a heat exchange tube, a heat exchanger and an air conditioner.
In order to solve the above problems, the present invention provides a heat exchange tube comprising:
a pipe body;
the fin assemblies are spirally distributed on the outer wall of the tube body along the axis of the tube body;
the fin component comprises fin roots, the fin roots are connected to the tube body, the tail ends of the fin roots are bent towards one side to form fin base parts, the fin roots and the fin base parts form reverse L-shaped fins, a cavity structure is formed between the reverse L-shaped fins adjacent to each other along the axial direction of the tube body, and gaps are reserved between the reverse L-shaped fins adjacent to each other along the circumferential direction of the tube body;
the fin part is provided with a bulge part, and the bulge part forms a cross flow channel on the outer surface of the fin assembly.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Preferably, the projections are pyramid-like shaped bosses.
Preferably, the fin assembly is provided at 11-60 per inch in the axial direction of the tube body.
Preferably, the fin assemblies are distributed along the circumference of the tube body in a number of 50-170.
Preferably, the circumferential spacing of the void formations in the cross-section of the tube body is in the range 0.03mm to 0.6 mm.
Preferably, the helical angle of the helical fin assembly on the outer wall of the tube body is 0.2-5 degrees.
Preferably, the number of the convex portions provided on the fin portion is 1 to 5.
Preferably, the projections have a span in the axial or circumferential direction of the tubular body of 0.03mm to 0.3 mm.
Preferably, the height of the projections is 0.05mm to 0.2 mm.
Preferably, the inner wall of the pipe body is provided with a thread-shaped internal tooth structure, the number of spiral heads of the internal tooth structure is 6-90, the addendum angle of the internal tooth structure is 10-120 degrees, the spiral angle is 10-75 degrees, and the tooth height of the internal tooth structure is 0.1-0.6 mm.
A heat exchanger comprising a heat exchange tube according to any one of the preceding claims.
An air conditioner comprises the heat exchange tube.
The heat exchange tube, the heat exchanger and the air conditioner provided by the invention at least have the following beneficial effects:
the heat exchange tube comprises a plurality of cavity structures, evaporation and heat exchange can be enhanced, and the circumferential axial flow of a refrigerant is enhanced; the outer surface of the fin component is provided with the convex parts, so that the surface roughness of the heat exchange tube is increased, the heat exchange area is increased, and meanwhile, cross flow channels are formed on the outer surface of the heat exchange tube to guide redundant refrigerants.
Drawings
FIG. 1 is a schematic structural diagram of a heat exchange tube according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of a fin assembly according to an embodiment of the present invention.
The reference numerals are represented as:
1. a pipe body; 2. a fin assembly; 3. root of the wing; 4. a fin portion; 5. a void structure; 6. a gap; 7. a boss portion; 8. an internal tooth structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 2, a heat exchange tube includes: a pipe body 1; the fin assemblies 2 are spirally distributed on the outer wall of the tube body 1 along the axis of the tube body 1; the fin component 2 comprises fin root parts 3, the fin root parts 3 are connected to the tube body 1, the tail ends of the fin root parts 3 are bent towards one side to form fin base parts 4, the fin root parts 3 and the fin base parts 4 form reverse L-shaped fins, cavity structures 5 are formed between reverse L-shaped fins adjacent to each other along the axial direction of the tube body 1, and gaps 6 are reserved between the reverse L-shaped fins adjacent to each other along the circumferential direction of the tube body 1; the fin portion 4 is provided with a boss portion 7 which forms a cross flow passage on the outer surface of the fin assembly 2.
In this embodiment, the protruding portion 7 is a cone-like boss.
In this embodiment, the fin assembly 2 is provided at 11 to 60, preferably 56 per inch in the axial direction of the tube body 1.
In this embodiment, the fin assembly 2 is distributed along the outer circumference of the tube body 1 in a number of 50 to 170, i.e., the number of helical heads of the helical fins is 50 to 170, preferably 130.
In the present embodiment, the circumferential spacing of the cavity structures 5 in the cross section of the tube body 1 is 0.03mm to 0.6mm, preferably 0.32 mm.
In this embodiment, the fin assembly 2 is helically disposed around the outer wall of the tube body 1 at a helix angle of 0.2 ° to 5 °, preferably 29', equal to about 0.4833 °.
In the present embodiment, the number of the convex portions 7 provided on the fin portion 4 is 1 to 5, preferably 2.
In this embodiment, the axial or circumferential span of the projection 7 along the pipe body 1 is 0.03mm to 0.3 mm.
In the present embodiment, the height of the boss 7 is 0.05mm to 0.2mm, preferably 0.05 mm.
In the embodiment of the invention, a plurality of cavity structures 5 formed by gaps among the gamma-shaped fins provide a vaporization core when the refrigerant is evaporated, thereby strengthening the evaporation heat exchange; the cavity structure 5 is spirally connected to form an annular channel, so that the circumferential flow of the refrigerant is enhanced, and the disturbance of a vapor phase and a liquid phase during the evaporation of the refrigerant is enhanced, thereby enhancing the heat exchange effect; axial and circumferential gaps are formed between each cavity structure 5, so that a refrigerant can enter a cavity, the refrigerant can be continuously supplemented when the refrigerant is evaporated, and the refrigerant steam is discharged, so that the evaporation can be continuously carried out, and a continuous evaporation process is formed.
The outer surface of the fin component 2 of the embodiment is provided with one or more convex parts 7, so that the roughness of the outer surface of the heat exchange tube can be increased, the contact area of the refrigerant and the heat exchange tube is increased, the refrigerant can be ensured to be fully contacted with the outer surface of the heat exchange tube, and the heat exchange effect is enhanced; and the falling speed of part of the refrigerant can be delayed, enough refrigerant can enter the cavity structure 5, and a continuous evaporation process is ensured.
Meanwhile, the plurality of protrusions 7 form cross flow channels on the outer surface, so that redundant refrigerants on the outer surface of the heat exchange tube can be guided, the refrigerants are prevented from being accumulated on the outer surface of the heat exchange tube, and on one hand, the situation that an excessively thick liquid film is formed on the outer surface of the tube and is not beneficial to heat transfer and dry evaporation is caused due to the fact that the lower discharge tube is lack of refrigerants can be prevented; on the other hand, the upper-discharge refrigerant can be prevented from dropping on an excessively thick liquid film to cause the refrigerant to splash, and the refrigerant cannot participate in heat exchange to cause the reduction of heat transfer efficiency; the cross flow channels can also ensure the falling directionality of the refrigerant, prevent the refrigerant from deviating when dropping and not dropping on the tubes right below, thereby leading the lower discharge tube to lack the refrigerant to cause dry evaporation and leading the refrigerant to be incapable of contacting with the heat exchange tube to cause the efficiency of the evaporator to be reduced.
In the embodiment, the inner wall of the pipe body 1 is provided with the thread-shaped internal tooth structure 8, so that the heat transfer area of the heat exchange pipe is increased, the turbulence of fluid in the heat transfer pipe can be enhanced, the heat exchange efficiency in the pipe is increased, the number of spiral heads of the internal tooth structure 8 is 6-90, the tooth crest angle of the internal tooth structure 8 is 10-120 degrees, and the tooth height of the internal tooth structure 8 is 0.1-0.6 mm. The section of the internal tooth structure 8 is triangular, and the included angle of the internal tooth structure 8 and the axis of the pipe body 1, namely the range of the helical angle is 10-75 degrees. The number of spiral heads of the internal tooth structure 8 in the optimal design is 56, the tooth crest angle of the internal tooth structure 8 is 40 degrees, the tooth height of the internal tooth structure 8 is 0.42mm, and the included angle between the internal tooth structure 8 and the axis of the pipe body 1 is 48 degrees.
The heat exchange tube internal tooth structure 8 and the fin component 2 of the embodiment are integrally formed with the tube body 1. The specific processing process comprises the following steps: firstly, processing spiral fins on the outer surface of a tube body 1 of a heat exchange tube, then cutting the spiral fins into a plurality of independent fins by using a knurling tool, then rolling and bending the fins into a reverse L shape by using a rolling cutter, and finally pressing a convex part on the fins by using a special cutter. The rolling and spinning technology is adopted for processing, the manufacturing materials of the heat exchange tube are not increased, the production cost is saved, and the strength and the heat transfer area of the heat exchange tube can be increased.
A heat exchanger comprising a heat exchange tube according to any one of the preceding claims.
An air conditioner comprises the heat exchange tube.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (12)
1. A heat exchange tube, comprising:
a pipe body (1);
the fin assemblies (2) are spirally distributed on the outer wall of the tube body (1) along the axis of the tube body (1);
the fin assembly (2) comprises fin roots (3), the fin roots (3) are connected to the tube body (1), the tail ends of the fin roots (3) are bent towards one side to form fin portions (4), the fin roots (3) and the fin portions (4) form reverse L-shaped fins, a cavity structure (5) is formed between the reverse L-shaped fins which are axially adjacent along the tube body (1), and gaps (6) are reserved between the reverse L-shaped fins which are circumferentially adjacent along the tube body (1);
and the fin part (4) is provided with a bulge part (7), and the bulge part (7) forms a cross flow channel on the outer surface of the fin assembly (2).
2. A heat exchange tube according to claim 1, characterized in that the projections (7) are cone-like bosses.
3. A heat exchange tube according to claim 1, characterized in that the fin assembly (2) is provided with 11-60 fins per inch in the axial direction of the tube body (1).
4. A heat exchange tube according to claim 1, characterized in that the fin assembly (2) is distributed in a number of 50-170 along the circumference of the tube body (1).
5. A heat exchange tube according to claim 1, characterised in that the circumferential spacing of the void formations (5) in the cross-section of the tube body (1) is 0.03mm-0.6 mm.
6. A heat exchange tube according to claim 1, characterized in that the helical angle of the fin assembly (2) spirally distributed on the outer wall of the tube body (1) is 0.2 ° to 2.5 °.
7. A heat exchange tube according to any one of claims 1 to 6, wherein the number of the bosses (7) provided on the fin portion (4) is 1 to 5.
8. A heat exchange tube according to claim 7, wherein the projection (7) has a span in the axial or circumferential direction of the tube body (1) of 0.03mm to 0.3 mm.
9. A heat exchange tube according to claim 7, characterized in that the height of the bosses (7) is 0.05-0.2 mm.
10. The heat exchange tube according to any one of claims 1 to 6, 8 and 9, characterized in that the inner wall of the tube body (1) is provided with a thread-shaped internal tooth structure (8), the number of the spiral heads of the internal tooth structure (8) is 6 to 90, the addendum angle of the internal tooth structure (8) is 10 to 120 degrees, the spiral angle is 10 to 75 degrees, and the tooth height of the internal tooth structure (8) is 0.1 to 0.6 mm.
11. A heat exchanger comprising the heat exchange tube of any one of claims 1 to 10.
12. An air conditioner characterized by comprising the heat exchange tube as recited in any one of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911258683.XA CN112944993A (en) | 2019-12-10 | 2019-12-10 | Heat exchange tube, heat exchanger and air conditioner |
| PCT/CN2020/112202 WO2021114738A1 (en) | 2019-12-10 | 2020-08-28 | Heat exchange tube, heat exchanger, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911258683.XA CN112944993A (en) | 2019-12-10 | 2019-12-10 | Heat exchange tube, heat exchanger and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944993A true CN112944993A (en) | 2021-06-11 |
Family
ID=76225479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911258683.XA Pending CN112944993A (en) | 2019-12-10 | 2019-12-10 | Heat exchange tube, heat exchanger and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112944993A (en) |
| WO (1) | WO2021114738A1 (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734949B2 (en) * | 1992-11-06 | 1995-04-19 | 株式会社日立製作所 | Heat transfer tube manufacturing method |
| CN1826504A (en) * | 2002-04-19 | 2006-08-30 | 沃尔弗林管子公司 | Heat transfer tubes, including methods of fabrication and use thereof |
| CN100365369C (en) * | 2005-08-09 | 2008-01-30 | 江苏萃隆铜业有限公司 | Heat exchange tube of evaporator |
| CN100547339C (en) * | 2008-03-12 | 2009-10-07 | 江苏萃隆精密铜管股份有限公司 | A kind of intensify heat transfer pipe and preparation method thereof |
| 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 |
| CN102121805A (en) * | 2011-04-07 | 2011-07-13 | 金龙精密铜管集团股份有限公司 | Enhanced heat transfer tube used for falling film evaporator |
| CN203704751U (en) * | 2014-02-26 | 2014-07-09 | 金龙精密铜管集团股份有限公司 | Pipe outside double reinforcement type condensing heat transfer pipe |
| CN104374224A (en) * | 2014-11-19 | 2015-02-25 | 金龙精密铜管集团股份有限公司 | Strengthened evaporation heat transferring tube |
| CN107782192B (en) * | 2017-10-27 | 2023-12-01 | 华南理工大学 | Stepped grid inner and outer finned tube for evaporation and condensation |
| CN109099749A (en) * | 2018-08-30 | 2018-12-28 | 珠海格力电器股份有限公司 | Heat exchange tube and heat pump unit |
-
2019
- 2019-12-10 CN CN201911258683.XA patent/CN112944993A/en active Pending
-
2020
- 2020-08-28 WO PCT/CN2020/112202 patent/WO2021114738A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021114738A1 (en) | 2021-06-17 |
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