CN212458020U - Micro-channel heat exchanger - Google Patents
Micro-channel heat exchanger Download PDFInfo
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- CN212458020U CN212458020U CN202020532714.8U CN202020532714U CN212458020U CN 212458020 U CN212458020 U CN 212458020U CN 202020532714 U CN202020532714 U CN 202020532714U CN 212458020 U CN212458020 U CN 212458020U
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- heat exchanger
- flat
- flat pipe
- heat exchange
- fins
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Other Air-Conditioning Systems (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to the technical field of heat exchangers, and discloses a micro-channel heat exchanger, which comprises a plurality of heat exchange units, wherein each heat exchange unit comprises a flat tube and a fin sleeved outside the flat tube; a refrigerant channel is arranged inside the flat tube, the surface of the flat tube comprises a wing surface, and the wing surface extends from the windward side of the flat tube to the leeward side of the flat tube; the fins are arranged into at least two pieces, and an airflow channel is formed between every two adjacent fins. Based on the structure, the wing surface can enable condensed water condensed on the surface of the flat pipe to rapidly leave the flat pipe under the action of gravity and wind force, so that the frosting phenomenon on the surface of the flat pipe is avoided, and the heat exchange efficiency of the heat exchanger is improved; the wing surface can also reduce the resistance of air flowing through the flat pipe, so that the pressure drop of the air passing through the airflow channel can be reduced, and the permeability of the heat exchanger is improved; in addition, the wing surface can introduce the leeward side of the flat pipe into the air entering the airflow channel, the airflow disturbance of the area is strengthened, the heat exchange capability of the leeward side of the flat pipe can be further enhanced, and the heat exchange effect of the heat exchanger is improved.
Description
Technical Field
The utility model relates to a heat exchanger technical field especially relates to a microchannel heat exchanger.
Background
Microchannel heat exchangers exhibit superior performance in many respects compared to conventional tube and fin heat exchangers. For example, microchannel heat exchangers have greater heat transfer efficiency, and therefore can be designed more compactly, reducing the volume of space occupied; the retention amount of the refrigerant in the micro-channel heat exchanger is less, so that the refrigerant flushing injection amount of the air-conditioning system can be reduced; the micro-channel heat exchanger can be made of all-aluminum materials, so that the weight of the heat exchanger can be reduced, and the manufacturing cost can be reduced.
However, when the microchannel heat exchanger is used as an evaporator of an air conditioner, in the process of air flowing through an airflow channel of the microchannel heat exchanger, water vapor in the air is gradually condensed on the flat tubes and the fins of the microchannel due to heat exchange and gradually gathered under the action of gravity and surface tension, which not only increases the thermal resistance of the microchannel heat exchanger, but also causes the permeability of the air inlet side to be reduced, thereby increasing the pressure drop of the airflow when the airflow passes through the microchannel heat exchanger. Especially in a heat pump system, the gathered condensed water can be cooled to generate a frosting phenomenon, so that the heat exchange effect of the heat exchanger is deteriorated, and the stable operation of the air conditioner is seriously influenced. As such, the application of the microchannel heat exchanger to products such as air source heat pumps is greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a drainage is effectual, is difficult for frosting, and heat exchange efficiency is high to the little microchannel heat exchanger of windage.
In order to achieve the above object, the utility model provides a microchannel heat exchanger, it includes a plurality of heat transfer unit, heat transfer unit includes:
the cooling system comprises a flat pipe, wherein a refrigerant channel is arranged inside the flat pipe, the surface of the flat pipe comprises a wing surface, and the wing surface extends from the windward side of the flat pipe to the leeward side of the flat pipe;
the fins are sleeved outside the flat pipes and are at least two, and an airflow channel is formed between every two adjacent fins.
In some embodiments of this application, the surface of flat pipe includes two airfoil, and two the airfoil is located the process respectively the central line of flat pipe and the planar both sides that are on a parallel with the air inlet direction.
In some embodiments of the present application, the two airfoils are arranged in a central symmetry.
In some embodiments of the present application, two side surfaces or one side surface of the fin is provided with a drainage groove, and the drainage groove is located on the lee side of the flat tube.
In some embodiments of the present application, the drainage groove extends along a length direction of the fin.
In some embodiments of the present application, the drain groove is formed by bending the fin.
In some embodiments of the present application, the fins are arranged at equal intervals along the length direction of the flat tubes.
In some embodiments of this application, the inside of flat pipe is equipped with two at least refrigerant channel, just refrigerant channel follows the equidistant range of width direction of flat pipe.
In some embodiments of the present application, the heat exchange unit includes at least two flat tubes, and each of the flat tubes simultaneously penetrates all of the fins.
In some embodiments of this application, the flat pipe is followed the length direction of fin is equidistant to be arranged.
The utility model provides a microchannel heat exchanger, compared with the prior art, its beneficial effect lies in:
on one hand, the streamline airfoil can enable condensate water condensed on the surface of the flat pipe to rapidly leave the flat pipe under the action of gravity and wind force, prevent the condensate water from being accumulated on the surface of the flat pipe, and avoid the frosting phenomenon on the surface of the flat pipe, so that the thermal resistance of the heat exchanger can be reduced, and the heat exchange efficiency of the heat exchanger can be improved; on the other hand, the streamlined wing surface can also reduce the resistance when the air flows through the flat pipe, thereby reducing the pressure drop when the air passes through the airflow channel and improving the permeability of the heat exchanger; in addition, due to the wall attachment effect of the fluid, the wing surface extending from the windward side of the flat pipe to the leeward side of the flat pipe can introduce the air entering the airflow channel into the leeward side of the flat pipe, so that the airflow disturbance of the region is enhanced, the effective contact area of the heat exchanger and the air is increased, the heat exchange capacity of the leeward side of the flat pipe can be enhanced, and the heat exchange effect of the heat exchanger is improved.
Drawings
Fig. 1 is an isometric view of a microchannel heat exchanger according to an embodiment of the present invention;
fig. 2 is a vertical cross-sectional view of the microchannel heat exchanger according to an embodiment of the present invention.
In the figure: 1. flat tubes; 11. a refrigerant channel; 12. an airfoil; 2. a fin; 21. a water discharge tank; 3. an air flow channel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is to be understood that in the description of the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indicating the number of technical features indicated, i.e. the features defined "first", "second" may explicitly or implicitly include one or more of such features; next, unless otherwise stated, "a plurality" means two or more.
It is to be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a microchannel heat exchanger, which mainly includes a plurality of heat exchange units, each of the heat exchange units includes a flat tube 1 and a fin 2 sleeved outside the flat tube 1; at least two refrigerant channels 11 are arranged inside the flat tube 1, the refrigerant channels 11 are arranged at equal intervals along the width direction of the flat tube 1, the surface of the flat tube 1 comprises wing surfaces 12, and the wing surfaces 12 extend from the windward side of the flat tube 1 to the leeward side of the flat tube 1; the fins 2 are at least two and are arranged at equal intervals along the length direction of the flat tube 1, and an airflow channel 3 is formed between every two adjacent fins 2.
Based on the structure, on one hand, the streamline airfoil 12 can enable condensate water condensed on the surface of the flat tube 1 to rapidly leave the flat tube 1 under the action of gravity and wind force, prevent the condensate water from being accumulated on the surface of the flat tube 1, and avoid the frosting phenomenon on the surface of the flat tube 1, so that the thermal resistance of the heat exchanger can be reduced, and the heat exchange efficiency of the heat exchanger can be improved; on the other hand, the streamlined airfoil 12 can also reduce the resistance of air flowing through the flat tube 1, further reduce the pressure drop of air when the air passes through the airflow channel 3, and improve the permeability of the heat exchanger; in addition, because of the wall attachment effect of the fluid, the airfoil 12 extending from the windward side of the flat tube 1 to the leeward side of the flat tube 1 can introduce the air entering the airflow channel 3 into the leeward side of the flat tube 1, so that the airflow disturbance of the region is enhanced, the effective contact area of the heat exchanger and the air is increased, the heat exchange capacity of the leeward side of the flat tube 1 can be enhanced, and the heat exchange effect of the heat exchanger is improved.
As shown in fig. 1 and 2, in some embodiments of the present invention, in order to enhance the above effect, the surface of the flat pipe 1 includes two wings 12, and the two wings 12 are respectively disposed on two sides of a plane passing through the center line of the flat pipe 1 and parallel to the air intake direction. Preferably, the two airfoils 12 are arranged in a centrosymmetric manner.
As shown in fig. 1 and fig. 2, in some embodiments of the present invention, in order to discharge the condensed water on the surface of the fin 2 in time, the two side surfaces or one side surface of the fin 2 is provided with the drainage grooves 21, and the drainage grooves 21 are located on the leeward side of the flat tube 1, so that the drainage grooves 21 collect the condensed water on the surface of the fin 2 by means of wind force, thereby speeding up the drainage. Preferably, the drainage grooves 21 extend in the longitudinal direction of the fins 2, and the drainage grooves 21 are formed by bending the fins 2, thereby facilitating the manufacturing process.
As shown in fig. 1 and 2, in some embodiments of the present invention, the heat exchange unit includes at least two flat tubes 1, and each flat tube 1 simultaneously passes through all the fins 2. Preferably, the flat tubes 1 are arranged at equal intervals in the longitudinal direction of the fin 2.
To sum up, the embodiment of the utility model provides a microchannel heat exchanger includes a plurality of heat transfer units, and the heat transfer unit includes flat pipe 1 and fin 2, and wherein, flat pipe 1's surface includes the airfoil 12 that extends to flat pipe 1's leeward side from flat pipe 1's windward side, and fin 2's surface is equipped with the water drainage tank 21 that is located flat pipe 1 leeward side. Compared with the prior art, the micro-channel heat exchanger has the following beneficial effects:
on the first hand, the streamline airfoil 12 can make the condensed water condensed on the surface of the flat tube 1 rapidly leave the flat tube 1 under the action of gravity and wind force, prevent the condensed water from gathering on the surface of the flat tube 1, and avoid the frosting phenomenon on the surface of the flat tube 1, thereby reducing the thermal resistance of the heat exchanger and improving the heat exchange efficiency thereof;
in the second aspect, the streamlined airfoil 12 can reduce the resistance of air flowing through the flat tube 1, thereby reducing the pressure drop of air passing through the airflow channel 3 and improving the permeability of the heat exchanger;
in the third aspect, due to the wall attachment effect of the fluid, the airfoil 12 can introduce the air entering the airflow channel 3 into the leeward side of the flat tube 1, so that the airflow disturbance in the area is enhanced, the effective contact area between the heat exchanger and the air is increased, the heat exchange capability of the leeward side of the flat tube 1 can be enhanced, and the heat exchange effect of the heat exchanger is improved;
in the fourth aspect, the drainage grooves 21 can drain the condensed water on the surfaces of the fins 2 in time, prevent the condensed water from being collected on the surfaces of the fins 2, and avoid the frosting phenomenon on the surfaces of the fins 2, thereby further reducing the thermal resistance of the heat exchanger and improving the heat exchange efficiency of the heat exchanger.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A microchannel heat exchanger comprising a plurality of heat exchange units, the heat exchange units comprising:
the cooling system comprises a flat pipe, wherein a refrigerant channel is arranged inside the flat pipe, the surface of the flat pipe comprises a wing surface, and the wing surface extends from the windward side of the flat pipe to the leeward side of the flat pipe;
the fins are sleeved outside the flat pipes and are at least two, and an airflow channel is formed between every two adjacent fins.
2. The microchannel heat exchanger of claim 1, wherein:
the surface of flat pipe includes two the airfoil, and two the airfoil is located respectively and is passed through the central line of flat pipe and the planar both sides that are on a parallel with the air inlet direction.
3. The microchannel heat exchanger of claim 2, wherein:
the two airfoils are distributed in a centrosymmetric manner.
4. The microchannel heat exchanger of claim 1, wherein:
and the two side surfaces or one side surface of each fin is provided with a water drainage groove, and the water drainage grooves are positioned on the leeward side of the flat pipes.
5. The microchannel heat exchanger of claim 4, wherein:
the drain grooves extend in the longitudinal direction of the fins.
6. The microchannel heat exchanger of claim 4, wherein:
the drainage groove is formed by bending the fin.
7. The microchannel heat exchanger of claim 1, wherein:
the fins are arranged at equal intervals along the length direction of the flat tubes.
8. The microchannel heat exchanger of claim 1, wherein:
at least two refrigerant channels are arranged inside the flat tubes, and the refrigerant channels are arranged at equal intervals along the width direction of the flat tubes.
9. The microchannel heat exchanger of claim 1, wherein:
the heat exchange unit comprises at least two flat pipes, and all the fins are penetrated by the flat pipes at the same time.
10. The microchannel heat exchanger of claim 9, wherein:
the flat pipes are arranged at equal intervals along the length direction of the fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532714.8U CN212458020U (en) | 2020-04-13 | 2020-04-13 | Micro-channel heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532714.8U CN212458020U (en) | 2020-04-13 | 2020-04-13 | Micro-channel heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212458020U true CN212458020U (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020532714.8U Active CN212458020U (en) | 2020-04-13 | 2020-04-13 | Micro-channel heat exchanger |
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| Country | Link |
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| CN (1) | CN212458020U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944482A (en) * | 2021-03-26 | 2021-06-11 | 珠海格力电器股份有限公司 | Surface cooler, fan coil, air conditioner and surface cooler heat exchange control method |
| CN114440688A (en) * | 2022-01-28 | 2022-05-06 | 广东美的暖通设备有限公司 | Flat pipe and heat exchanger |
-
2020
- 2020-04-13 CN CN202020532714.8U patent/CN212458020U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944482A (en) * | 2021-03-26 | 2021-06-11 | 珠海格力电器股份有限公司 | Surface cooler, fan coil, air conditioner and surface cooler heat exchange control method |
| CN114440688A (en) * | 2022-01-28 | 2022-05-06 | 广东美的暖通设备有限公司 | Flat pipe and heat exchanger |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.1 Haixin Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province Patentee after: Hisense Air Conditioning Co.,Ltd. Country or region after: China Address before: No. 151, Zhuzhou Road, Laoshan District, Qingdao, Shandong Patentee before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. Country or region before: China |