CN110887217A - Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner - Google Patents
Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner Download PDFInfo
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- CN110887217A CN110887217A CN201911070567.5A CN201911070567A CN110887217A CN 110887217 A CN110887217 A CN 110887217A CN 201911070567 A CN201911070567 A CN 201911070567A CN 110887217 A CN110887217 A CN 110887217A
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- 238000005315 distribution function Methods 0.000 title claims abstract description 7
- 239000003507 refrigerant Substances 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 238000009826 distribution Methods 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 125000006850 spacer group Chemical group 0.000 claims description 33
- 238000000926 separation method Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 21
- 238000012546 transfer Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a micro-channel heat exchanger with an internal flow distribution function and an external flow distribution function and an air conditioner, which comprise a first flow collection pipe, a second flow collection pipe, a pipe body and fins, wherein the first flow collection pipe and the second flow collection pipe are connected through the pipe body, the fins are arranged on the pipe body, the first flow collection pipe is internally divided into a plurality of first cavities, injection hole pipes are arranged in the first cavities, a flow distribution mechanism is arranged at the bottom of the first flow collection pipe, and refrigerant flows into the first cavities after being distributed by the flow distribution mechanism. Through combining the two kinds of reposition of redundant personnel modes in with outside the pipe and intraductal, use the reposition of redundant personnel mechanism to shunt outside first pressure manifold earlier for the refrigerant flow that gets into each first cavity is roughly the same, then uses the injection hole pipe that draws that has the injection effect again and further shunts in each first cavity inside, has promoted the gas-liquid homogeneity of microchannel heat exchanger, has improved the heat transfer ability of microchannel heat exchanger.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a micro-channel heat exchanger with an internal and external shunt function and an air conditioner.
Background
The micro-channel heat exchanger is a novel high-efficiency heat exchanger, has the advantages of high heat transfer efficiency, small volume, light weight, small filling amount and the like, is popularized and applied in large batches in outdoor single-cold machines, is not mature in the technology on micro-channel evaporators and heat pump models, and is difficult to realize gas-liquid two-phase distribution, refrigeration and heating flow paths and frosting easily when an outdoor unit is used as a heat pump, so that the heat pump type micro-channel heat exchanger is difficult to enter a practical stage.
At present, two modes of external flow distribution or internal flow distribution are generally adopted to solve the problem of uneven distribution of gas phase and liquid phase, but the problem of uneven flow distribution cannot be completely solved by two single flow distribution modes, for example, the general method of the external flow distribution mode is to divide a collecting pipe into a plurality of chambers, then a flow divider is adopted to distribute flow to each chamber in the collecting pipe, and the problem of uneven flow distribution in each chamber is still not completely solved due to the absence of a flow equalizing mechanism. For an independent in-pipe flow distribution mode, because the inside of the collecting pipe is a large cavity, the influence of liquid level fluctuation on the flow of each flat pipe is large due to the complexity of internal gas-liquid phases, the flow distribution difference of the flat pipes at the near end and the far end inside the collecting pipe is large, and the phenomenon of uneven flow distribution also exists.
A related technology is proposed to solve the above problems, for example, japanese patent No. JP 6493575B 1 discloses a microchannel heat exchanger in which the inside and the outside of a header are simultaneously split, but the header of the microchannel heat exchanger needs to be welded in three parts, the adopted spacer has a complex structure, and the assembly between a partition plate and the spacer in the header is difficult, so that the process is complex, and the processing cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a micro-channel heat exchanger with inside and outside flow distribution, which mainly solves the problems of uneven flow distribution and poor heat exchange performance of the heat exchanger of the micro-channel heat exchanger of a heat pump air-conditioning system, and has the advantages of simple structure and processing technology, low cost and good flow distribution effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe, includes first pressure manifold, second pressure manifold, body and fin, first pressure manifold with the second pressure manifold passes through the body is connected, the fin sets up on the body, separate into the first cavity of a plurality of in the first pressure manifold, all be provided with in the first cavity and draw and penetrate the hole pipe, first pressure manifold bottom is provided with reposition of redundant personnel mechanism, and the refrigerant warp get into a plurality of behind the reposition of redundant personnel mechanism reposition of redundant personnel in the first cavity. Through combining the two kinds of reposition of redundant personnel modes in with outside the pipe and intraductal, use the reposition of redundant personnel mechanism to shunt outside first pressure manifold earlier for the refrigerant flow that gets into each first cavity is roughly the same, then uses the injection hole pipe that draws that has the injection effect again and further shunts in each first cavity inside, has promoted the gas-liquid homogeneity of microchannel heat exchanger, has improved the heat transfer ability of microchannel heat exchanger.
Furthermore, a plurality of separation mechanisms are arranged in the first collecting pipe, and the separation mechanisms separate the first collecting pipe into a plurality of first cavities. The first collecting pipe is divided into the plurality of first cavities through the separating mechanism, the first cavities with the same flow rate can enter different first cavities respectively to be subjected to next-step flow distribution, and the first cavities are used as further flow distribution places, so that the flow distribution of the refrigerant is ensured to be more uniform.
Furthermore, the separation mechanism comprises a first spacer and a second spacer, a second cavity is formed between the first spacer and the second spacer, an opening is formed in the first spacer, a hole is formed in the second spacer, and the hole is correspondingly arranged at the position close to the wall of the first collecting pipe. The refrigerant of the preliminary reposition of redundant personnel of throttling mechanism can be introduced into the second cavity through the hole on the second spacer, and the position of hole can be adjusted according to the flow direction adaptability of refrigerant, and in the refrigerant introduced the opening on the first spacer entering first cavity behind the second cavity, the refrigerant shunts through drawing the ejector pin hole pipe in first cavity again.
Furthermore, a plurality of third spacers are arranged in the second collecting pipe, and the third spacers separate the second collecting pipe into a plurality of third cavities. The plurality of third cavities receive the refrigerant transmitted from the pipe body, so that the refrigerant can be uniformly distributed in different third cavities, and the refrigeration effect of the air conditioner is improved; the high-temperature gaseous refrigerant that the same can receive and come through the intake pipe transmission again evenly transmits the high-temperature gaseous refrigerant to the fin heat transfer, has promoted the heating effect of air conditioner.
Furthermore, draw and penetrate the hole pipe and include drawing the hole and drawing and penetrate the side opening, draw the hole setting and drawing the hole socle portion, draw and penetrate the side opening and set up in drawing and penetrate the hole pipe side. When the refrigerant flows through the ejection hole pipe, negative pressure is generated at the ejection hole at the bottom of the ejection hole pipe, the gas-liquid refrigerant near the ejection hole is ejected into the ejection hole pipe through the ejection hole to be mixed with the main flow path refrigerant, so that the gas-liquid refrigerant in each first cavity can automatically and circularly flow, the gas-liquid refrigerant in the first cavity is fully and uniformly mixed, the phenomenon of liquid loading at the bottom of the first cavity due to the action of gravity can be avoided, and the ejection side hole formed in the ejection hole pipe can ensure the flow uniformity of the refrigerant.
Furthermore, draw and penetrate the side opening and be provided with a plurality of and by lower supreme even interval distribution, draw and penetrate the side opening and reduce gradually by lower supreme aperture. The shape of the injection hole pipe is of an inverted frustum structure, the pipe diameter of the bottom of the injection hole pipe is smaller, and the diameter of the injection side hole is gradually reduced from bottom to top so as to ensure the flow uniformity of gas-liquid refrigerants coming out of different injection side holes.
Further, the body specifically is flat pipe. The stable transmission of refrigerant is carried out through the flat pipe for the refrigerant can carry out abundant heat transfer through fin department, improves its heat transfer performance.
Furthermore, throttle mechanism includes shunt and capillary, the shunt with connect through a plurality of capillaries between the first pressure manifold. The refrigerant is primarily separated through the flow divider and the capillary tube, and the refrigerant is transmitted to different first cavities through the capillary tube after being divided by the flow dividing tube, so that the primary flow dividing of the refrigerant is realized.
Further, the shunt is specifically a T-shaped shunt. The T-shaped flow divider can realize better and more uniform refrigerant flow division, and the refrigerant enters from the bottom of the T-shaped flow divider and flows out from the top of the T-shaped flow divider.
An air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, a heat exchanger is arranged on the outdoor unit, and the heat exchanger is a micro-channel heat exchanger with an internal flow distribution function and an external flow distribution function.
The micro-channel heat exchanger with the inside and outside shunt and the air conditioner provided by the invention have the beneficial effects that: the two flow dividing modes of the outside of the pipe and the inside of the pipe are combined, the flow dividing mechanism is firstly used for dividing the flow outside the first collecting pipe, so that the flow of the refrigerant entering each first cavity is approximately the same, and then the injection hole pipe with the injection function is used for further dividing the flow inside each first cavity, so that the gas-liquid uniformity of the micro-channel heat exchanger is improved, and the heat exchange capacity of the micro-channel heat exchanger is improved; the pipe is divided by a T-shaped liquid separator, so that the structure and the processing technology are simple, the cost is low, and the flow dividing effect is good; the gas-liquid refrigerant in the first cavity can be fully and uniformly mixed through the injection holes in the injection hole pipe, the liquid accumulation phenomenon caused by the gravity action at the bottom of the cavity can be avoided, and the injection side holes are gradually reduced from bottom to top in diameter, so that the flow uniformity of the gas-liquid refrigerant coming out from different injection side holes is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged partial schematic view of the present invention;
FIG. 3 is a schematic view of an eductor orifice structure of the present invention;
fig. 4 is a schematic half-sectional view of a first header structure according to the present invention.
In the figure: 1. a first header; 2. a second header; 3. flat tubes; 4. a fin; 5. an injection hole pipe; 6. a first cavity; 7. a first spacer; 8. a second spacer; 9. a capillary tube; 10. a T-shaped shunt; 11. a third spacer; 12. a second cavity; 13. an injection hole; 14. injecting the side hole; 15. a flow guide cavity; the solid arrows indicate the refrigerant flow direction during cooling; the hollow arrows indicate the flow of the refrigerant during heating.
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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a microchannel heat exchanger with inside and outside tube flow distribution.
As shown in fig. 1, a microchannel heat exchanger with inside and outside flow splitting comprises: the heat exchanger comprises a first collecting pipe 1, a second collecting pipe 2, flat pipes 3 and fins 4, wherein the first collecting pipe 1 and the second collecting pipe 2 are connected through the flat pipes 3, the fins 4 are arranged on the flat pipes 3, and a plurality of separating mechanisms are arranged in the first collecting pipe 1; as shown in fig. 4, the separation mechanism separates the first collecting pipe 1 into a plurality of first cavities 6, the separation mechanism includes a first spacer 7 and a second spacer 8, a second cavity 12 is formed between the first spacer 1 and the second spacer 8, the first spacer 7 is provided with an opening, the second spacer 8 is provided with a hole, the hole is correspondingly arranged at a position close to the pipe wall of the first collecting pipe 1, and the first cavities 6 are internally provided with injection hole pipes 5; as shown in fig. 3, the injection hole pipe 5 includes an injection hole 13 and an injection side hole 14, the injection hole pipe 5 is in a reverse round structure, the pipe diameter of the bottom is small, the injection hole 13 is arranged at the bottom of the injection hole pipe 5, the injection side hole 14 is arranged on the side surface of the injection hole pipe 5, the injection side hole 14 is provided with a plurality of holes and is uniformly distributed at intervals from bottom to top, and the injection side hole 14 is gradually reduced from bottom to top in hole diameter.
As shown in fig. 2, a T-shaped current divider 10 and a capillary 9 are arranged at the bottom of the first collecting pipe 1, the T-shaped current divider 10 is connected with the bottom of the first collecting pipe 1 through the capillary 9, a plurality of third spacers 11 are arranged in the second collecting pipe 2, and the third spacers 11 separate the second collecting pipe 2 into a plurality of third cavities.
In the embodiment, during refrigeration, two-phase refrigerants firstly pass through a T-shaped splitter 10 and then respectively enter corresponding flow guide cavities 15 after passing through a liquid separating capillary tube 9, then enter a second cavity 12 formed by a corresponding first spacer 7 and a second spacer 8 after exiting from the flow guide cavities 15 and then enter injection hole tubes 5 of each first cavity 6 in a first collecting pipe 1, primary external flow distribution is realized outside the pipe by the T-shaped splitter 10 and then enter the injection hole tubes 5 through the liquid separating capillary tube 9 to realize further internal flow distribution, gradually-increased hole tube side holes 14 are formed in one side of each injection hole tube 5 from top to bottom, so that the refrigerant flow rate exiting from each hole tube side hole 14 and entering each flat tube 3 is basically the same, because the injection hole tubes 5 are adopted in the first cavities 6 of the first collecting pipe 1, the refrigerant at the bottom of the first cavity 6 can be sucked into the injection hole tubes 5 through main holes 13 and mixed with the refrigerant flowing through the injection hole tubes 5 to flow circularly in the first cavities 6, therefore, the phenomenon of liquid accumulation generated at the bottom of the first cavity 6 can be avoided, and meanwhile, the refrigerant can be better and uniformly distributed to the hole pipe side holes 14, so that the liquid distribution of the refrigerant is uniform, and then superheated gas is formed after heat exchange is carried out between the refrigerant and air through the fins 4 on the flat pipes 3, enters the second collecting pipe 2 and is converged through the gas collecting pipe;
refrigerant flow direction is opposite during heating, because the refrigerant that gets into second pressure manifold 2 is gaseous this moment, does not basically have the uneven problem of separating liquid, and overheated gaseous state refrigerant gets into to second pressure manifold 2 from the intake pipe, forms the supercooled liquid state refrigerant after flat pipe 3 and the air heat transfer and gets into first pressure manifold 1, gets into after drawing penetrating hole pipe 5 and divides liquid capillary 9 and T type shunt 10.
The advantage of this embodiment lies in, has divided into left and right two parts to the collecting main, makes processing and assembly process become simple and convenient, through set up water conservancy diversion cavity 15 in first collecting main 1 inboard and replace outside overlength liquid separating capillary 9, makes the function of collecting main abundanter and compact, has reduced the waste of heat exchanger occupation space, because the circulation area of refrigerant reduces in first collecting main 1, leads to the refrigerant velocity of flow that flows into every first cavity 6 to increase, and then makes the reposition of redundant personnel homogeneity of refrigerant better.
Example 2: an air conditioner.
An air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, a heat exchanger is arranged on the outdoor unit, and the heat exchanger is specifically a microchannel heat exchanger with inside and outside flow distribution as in embodiment 1.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (10)
1. The utility model provides a microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe which characterized in that, includes first pressure manifold, second pressure manifold, body and fin, first pressure manifold with the second pressure manifold passes through the body is connected, the fin sets up on the body, separate into a plurality of first cavity in the first pressure manifold, all be provided with in the first cavity and draw and penetrate the hole pipe, first pressure manifold bottom is provided with reposition of redundant personnel mechanism, and the refrigerant warp get into a plurality of after reposition of redundant personnel mechanism reposition of redundant personnel in the first cavity.
2. The microchannel heat exchanger with internal and external flow splitting as recited in claim 1, wherein a plurality of separation mechanisms are disposed within said first header, said separation mechanisms separating said first header into a plurality of first cavities.
3. The microchannel heat exchanger with internal and external flow splitting as recited in claim 2, wherein the separating means comprises a first spacer and a second spacer, a second cavity is formed between the first spacer and the second spacer, the first spacer is provided with an opening, the second spacer is provided with a hole, and the hole is correspondingly arranged near the wall of the first header pipe.
4. The microchannel heat exchanger with inside-outside flow splitting as set forth in claim 1, wherein a plurality of third spacers are disposed within said second header, said third spacers separating said second header into a plurality of third cavities.
5. The micro-channel heat exchanger with the inside and outside flow distribution function according to claim 1, wherein the injection hole pipe comprises an injection hole and an injection side hole, the injection hole is formed in the bottom of the injection hole pipe, and the injection side hole is formed in the side face of the injection hole pipe.
6. The microchannel heat exchanger with inside and outside flow distribution according to claim 5, wherein the ejection side holes are provided in a plurality and are uniformly spaced from bottom to top, and the diameter of the ejection side holes is gradually reduced from bottom to top.
7. The microchannel heat exchanger with inside-outside flow splitting as claimed in claim 1, wherein the tubes are embodied as flat tubes.
8. The microchannel heat exchanger with internal and external flow splitting as claimed in claim 1, wherein the throttling mechanism comprises a flow splitter and a capillary tube, and the flow splitter is connected with the first collecting pipe through a plurality of capillary tubes.
9. The microchannel heat exchanger with inside-outside flow splitting as set forth in claim 8, wherein said splitter is embodied as a T-splitter.
10. An air conditioner, comprising an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, characterized in that a heat exchanger is arranged on the outdoor unit, and the heat exchanger is a micro-channel heat exchanger with inside and outside flow distribution as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070567.5A CN110887217A (en) | 2019-11-05 | 2019-11-05 | Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070567.5A CN110887217A (en) | 2019-11-05 | 2019-11-05 | Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN110887217A true CN110887217A (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911070567.5A Pending CN110887217A (en) | 2019-11-05 | 2019-11-05 | Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner |
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| CN (1) | CN110887217A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278908A (en) * | 2011-09-16 | 2011-12-14 | 四川长虹空调有限公司 | Microchannel heat exchanger |
| WO2015027783A1 (en) * | 2013-08-30 | 2015-03-05 | 杭州三花研究院有限公司 | Micro-channel heat exchanger and method for manufacturing same |
| CN105180518A (en) * | 2015-09-15 | 2015-12-23 | 珠海格力电器股份有限公司 | Header pipe and micro-channel heat exchanger and air conditioning system with same |
| CN105299966A (en) * | 2015-11-17 | 2016-02-03 | 珠海格力电器股份有限公司 | Micro-channel heat exchanger and air conditioner |
| CN211781887U (en) * | 2019-11-05 | 2020-10-27 | 珠海格力电器股份有限公司 | Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner |
-
2019
- 2019-11-05 CN CN201911070567.5A patent/CN110887217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278908A (en) * | 2011-09-16 | 2011-12-14 | 四川长虹空调有限公司 | Microchannel heat exchanger |
| WO2015027783A1 (en) * | 2013-08-30 | 2015-03-05 | 杭州三花研究院有限公司 | Micro-channel heat exchanger and method for manufacturing same |
| CN105180518A (en) * | 2015-09-15 | 2015-12-23 | 珠海格力电器股份有限公司 | Header pipe and micro-channel heat exchanger and air conditioning system with same |
| CN105299966A (en) * | 2015-11-17 | 2016-02-03 | 珠海格力电器股份有限公司 | Micro-channel heat exchanger and air conditioner |
| CN211781887U (en) * | 2019-11-05 | 2020-10-27 | 珠海格力电器股份有限公司 | Micro-channel heat exchanger with in-pipe and out-pipe flow distribution function and air conditioner |
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