CN115235283A - Internal thread aluminum pipe, heat exchanger and air conditioner - Google Patents
Internal thread aluminum pipe, heat exchanger and air conditioner Download PDFInfo
- Publication number
- CN115235283A CN115235283A CN202210908362.5A CN202210908362A CN115235283A CN 115235283 A CN115235283 A CN 115235283A CN 202210908362 A CN202210908362 A CN 202210908362A CN 115235283 A CN115235283 A CN 115235283A
- Authority
- CN
- China
- Prior art keywords
- internal thread
- pipe
- internally threaded
- aluminum pipe
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 45
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims abstract description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract 1
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- 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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides an internal thread aluminum pipe, a heat exchanger and an air conditioner, wherein the internal thread aluminum pipe comprises: a pipe body made of an aluminum alloy; and internal thread teeth arranged on the side wall of the pipe body, wherein the tooth height of the internal thread teeth is in the range of 0.20mmm to 0.30mm, and the helix angle of the internal thread teeth is in the range of 10 degrees to 30 degrees. The material of internal thread pipe is aluminium, compares the copper pipe among the prior art, and weight is lighter. Furthermore, by optimizing the tooth height and helix angle parameters of the internal thread teeth, the heat exchange internal surface area inside the internal thread aluminum pipe is larger, the refrigerant in the internal thread aluminum pipe generates secondary flow different from that in the radial direction, the turbulence intensity is enhanced, and the internal thread aluminum pipe is light in weight and has high heat exchange efficiency.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to an internal thread aluminum pipe, a heat exchanger and an air conditioner.
Background
The heat exchanger is an important part of the air conditioner and comprises a plurality of fins and copper pipes, and after the refrigerant passes through the copper pipes, the refrigerant exchanges heat with the outside air through the fins, so that the effects of refrigeration and heating are achieved. Further, in order to miniaturize the air conditioner, the weight and the heat exchange amount of the heat exchanger are important parameters, and therefore, it is an important research direction of the air conditioner to simultaneously achieve the light weight and the high heat exchange efficiency of the heat exchanger.
Disclosure of Invention
Accordingly, the present invention provides an internally threaded aluminum pipe which is lighter in weight and has good heat exchange efficiency.
In order to solve the above problems, the present invention provides an internally threaded aluminum pipe comprising: a pipe body made of an aluminum alloy; and internal thread teeth arranged on the side wall of the pipe body, wherein the tooth height of the internal thread teeth is in the range of 0.20mmm to 0.30mm, and the helix angle of the internal thread teeth is in the range of 10 degrees to 30 degrees.
Optionally, the height of the internal thread teeth is 0.25mm.
Optionally, the helix angle of the internal thread teeth is 15 °.
Optionally, the crest angle of the internal thread tooth is in the range of 25 ° to 30 °.
Optionally, the rack count of the internally threaded teeth is in the range of 40 to 60.
Optionally, the wall thickness of the tubular body is in the range of 0.4mm to 0.5 mm.
Optionally, the outer diameter of the tube body is 7mm (the outer diameter should be between 6.95 and 7.05).
Optionally, the grammage of the internally threaded aluminum pipe is in the range of 30g/m to 35 g/m.
The invention also provides a heat exchanger which comprises a plurality of heat exchange fins arranged in parallel and an internal thread copper pipe arranged among the heat exchange fins in a penetrating mode, wherein the internal thread copper pipe is the internal thread copper pipe.
The invention also provides an air conditioner which comprises the heat exchanger.
The invention has the following advantages:
by utilizing the technical scheme of the invention, the internal thread pipe is made of aluminum, and compared with the copper pipe in the prior art, the internal thread pipe is lighter in weight. Furthermore, by optimizing the tooth height and helix angle parameters of the internal thread teeth, the heat exchange internal surface area inside the internal thread aluminum pipe is larger, the refrigerant in the internal thread aluminum pipe generates secondary flow different from that in the radial direction, the turbulence intensity is enhanced, and the internal thread aluminum pipe is light in weight and has high heat exchange efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic perspective view showing an internally threaded aluminum pipe of the invention;
FIG. 2 is a schematic sectional view of an internally threaded aluminum pipe of the invention;
FIG. 3 shows an enlarged schematic view at A in FIG. 2;
FIG. 4 is a schematic view showing the structure of an internally threaded tooth of the internally threaded aluminum pipe of the invention;
FIG. 5 shows an enlarged schematic view at B in FIG. 4; and
FIG. 6 is a graph showing a comparison of the heat transfer coefficients of the internally threaded aluminum pipe of the invention and the prior art copper pipe.
Description of reference numerals:
10. a tube body; 11. internal thread teeth.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 5, the internally threaded aluminum pipe of the present embodiment includes a pipe body 10 and internally threaded teeth 11. Wherein the pipe body 10 is made of an aluminum alloy. The female thread teeth 11 are provided on the sidewall of the tubular body 10, and further, the tooth height h of the female thread teeth is in the range of 0.20mmm to 0.30mm, and the helix angle α of the female thread teeth is in the range of 10 ° to 30 °.
By adopting the technical scheme of the embodiment, the internal thread pipe is made of aluminum, and compared with a copper pipe in the prior art, the internal thread pipe is lighter in weight. Further, by optimizing the tooth height h and the helix angle alpha parameters of the internal thread teeth 11, the heat exchange internal surface area inside the internal thread aluminum pipe is larger, meanwhile, the refrigerant in the internal thread aluminum pipe generates secondary flow different from the radial flow, the turbulence intensity is enhanced, and the internal thread aluminum pipe is light in weight and has high heat exchange efficiency.
The pipe body 10 has a hollow structure, and the female screw teeth 11 are provided on the inner wall of the pipe body 10. In the embodiment, the internal thread teeth 11 and the pipe body 10 are of an integral structure, and the internal thread teeth 11 are formed by machining or integral casting.
Further, the tooth height h of the female screw tooth 11 in the present embodiment is 0.25mm. As can be seen in fig. 2, the tooth height h is the distance from the crest to the root of the internal thread 11. Under the great condition of tooth height h, can increase the area of contact of refrigerant and internal thread aluminum pipe to improve the heat transfer effect.
Further, the helix angle α of the internal thread teeth 11 in the present embodiment is 15 °. As can be seen in fig. 5, the helix angle α indicates the angle that the internal thread teeth 11 are inclined in the axial direction of the pipe body 10. The helix angle alpha enables the refrigerant to be directed and travel in a helical direction.
In the embodiment, the large-angle helical angle alpha can enable the refrigerant in the pipeline to generate secondary flow different from the radial flow, increase the turbulence intensity, strengthen the convective heat transfer during evaporation and condensation, and improve the heat transfer effect.
As shown in fig. 3, in the present embodiment, the crest angle β of the female thread tooth 11 is in the range of 25 ° to 30 °. Specifically, the crest angle β indicates an angle formed by two sides of the internal thread tooth 11.
Preferably, the crest angle β of the female thread tooth 11 of the present embodiment is 28 °.
As shown in fig. 2, in the present embodiment, the rack number of the female screw teeth 11 is in the range of 40 to 60. Specifically, the number of the female screw teeth 11 determines the density thereof. The higher the number of teeth 40, the denser the internal thread teeth 11, and the lower the number of teeth 40, the more sparse the internal thread teeth 11.
Preferably, the number of the teeth of the female screw-thread teeth 11 of the present embodiment is 50.
As shown in fig. 3, in the solution of the present embodiment, the wall thickness d of the pipe body 10 is in the range of 0.4mm to 0.5 mm. The wall thickness d is also the bottom wall thickness of the internally threaded aluminum pipe.
Preferably, the wall thickness d of the tubular body 10 is 0.47mm.
Preferably, the outer diameter φ of the pipe body 10 is 7mm. Specifically, the outer diameter φ of the pipe body 10 can be adaptively adjusted according to the joint size of the heat exchanger.
Preferably, the grammage of the internally threaded aluminium tube is in the range 30g/m to 35 g/m. Specifically, the grammage of the internally threaded aluminum pipe in the present embodiment is 33.5g/m. Compared with the 54.07g/m reduction range of the prior internal thread copper pipe, the reduction range is about 38 percent, so the weight of the heat exchanger can be reduced. In addition, the aluminum pipe has a great advantage compared with the price of the copper pipe raw material, so that the manufacturing cost of the air conditioner can be greatly reduced.
Referring to fig. 6, the applicant conducted a comparative experiment of heat transfer coefficient between the internally threaded aluminum pipe of the present application and the internally threaded copper pipe of the prior art. Wherein, the upper part of figure 6 is the comparison result of the heat transfer coefficient of the internal thread aluminum pipe of the application and the internal thread copper pipe in the prior art when the heat exchanger is used as a condenser. Fig. 6 is a graph showing the comparison result of the heat transfer coefficient between the internally threaded aluminum pipe of the present application and the internally threaded copper pipe of the prior art when the heat exchanger is used as an evaporator.
From the experimental result of fig. 6, the evaporation and condensation heat transfer coefficients of the internal thread aluminum pipe with the optimized tooth profile meet the performance use requirements of the air conditioner heat exchanger. Wherein, the evaporation heat transfer coefficient of the single pipe of the novel phi 7 internal thread aluminum pipe is about 4800 (w/m 2. K), and the condensation heat transfer coefficient is about 3000 (w/m 2. K).
This embodiment still provides a heat exchanger, including a plurality of heat transfer fins of a plurality of parallel settings to and wear to establish the internal thread copper pipe between a plurality of heat transfer fins, the internal thread copper pipe is foretell internal thread copper pipe.
The embodiment also provides an air conditioner, which comprises the heat exchanger.
Of course, other electrical appliances provided with heat exchangers can also adopt the internal thread aluminum pipe structure.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An internally threaded aluminum pipe, comprising:
a tube (10) made of an aluminum alloy;
internal thread teeth (11) arranged on the side wall of the pipe body (10),
wherein the height (h) of the internal thread teeth is in the range of 0.20mmm to 0.30mm, and the helix angle (α) of the internal thread teeth is in the range of 10 ° to 30 °.
2. The internally threaded aluminum pipe according to claim 1, wherein the tooth height (h) of the internally threaded tooth (11) is 0.25mm.
3. An internally threaded aluminum pipe according to claim 1 wherein the helix angle (α) of the internally threaded teeth (11) is 15 °.
4. The internally threaded aluminum pipe according to claim 1, wherein a crest angle (β) of the internally threaded tooth (11) is in the range of 25 ° to 30 °.
5. The internally threaded aluminum pipe according to claim 1, wherein the rack count of the internally threaded teeth (11) is in the range of 40 to 60.
6. An internally threaded aluminium pipe according to any one of claims 1 to 5 wherein the wall thickness (d) of the pipe body is in the range 0.4mm to 0.5 mm.
7. An internally threaded aluminum pipe according to any one of claims 1 to 5, wherein the outer diameter (Φ) of the pipe body (10) is 7mm.
8. An internally threaded aluminum pipe according to any one of claims 1 to 5, wherein the grammage of the internally threaded aluminum pipe is in the range of 30 to 35 g/m.
9. A heat exchanger is characterized by comprising a plurality of heat exchange fins arranged in parallel and an internal thread copper pipe arranged among the heat exchange fins in a penetrating mode, wherein the internal thread copper pipe is the internal thread copper pipe in any one of claims 1 to 8.
10. An air conditioner characterized by comprising the heat exchanger according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210908362.5A CN115235283A (en) | 2022-07-29 | 2022-07-29 | Internal thread aluminum pipe, heat exchanger and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210908362.5A CN115235283A (en) | 2022-07-29 | 2022-07-29 | Internal thread aluminum pipe, heat exchanger and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115235283A true CN115235283A (en) | 2022-10-25 |
Family
ID=83678060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210908362.5A Pending CN115235283A (en) | 2022-07-29 | 2022-07-29 | Internal thread aluminum pipe, heat exchanger and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115235283A (en) |
-
2022
- 2022-07-29 CN CN202210908362.5A patent/CN115235283A/en active Pending
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