CN110887217B - Microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe and air conditioner - Google Patents
Microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe and air conditioner Download PDFInfo
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- CN110887217B CN110887217B CN201911070567.5A CN201911070567A CN110887217B CN 110887217 B CN110887217 B CN 110887217B CN 201911070567 A CN201911070567 A CN 201911070567A CN 110887217 B CN110887217 B CN 110887217B
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- pipe
- heat exchanger
- tube
- collecting pipe
- microchannel heat
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- 238000002347 injection Methods 0.000 claims abstract description 64
- 239000007924 injection Substances 0.000 claims abstract description 64
- 239000003507 refrigerant Substances 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 125000006850 spacer group Chemical group 0.000 claims description 22
- 238000000926 separation method Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005192 partition Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000010438 heat treatment 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
- 239000007789 gas Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid 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
Classifications
-
- 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
Landscapes
- 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 microchannel heat exchanger with internal and external pipe shunting and an air conditioner, which comprise a first collecting pipe, a second collecting pipe, a pipe body and fins, wherein the first collecting pipe and the second collecting pipe are connected through the pipe body, the fins are arranged on the pipe body, the first collecting pipe is internally divided into a plurality of first cavities, injection hole pipes are arranged in the first cavities, a shunting mechanism is arranged at the bottom of the first collecting pipe, and a refrigerant enters the first cavities after being shunted by the shunting mechanism. Through combining two kinds of reposition of redundant personnel modes outside the pipe and in the pipe, use 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 has the injection effect in each first cavity inside to shunt further, 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 inside and outside split flow and an air conditioner.
Background
The microchannel heat exchanger is a novel efficient heat exchanger, has the advantages of high heat transfer efficiency, small volume, light weight, small filling amount and the like, is widely popularized and applied to outdoor single-cooler machines in batches, is not mature in technology on microchannel evaporators and heat pump models, mainly has the problems that gas-liquid two-phase distribution is uneven, refrigeration and heating flow paths are difficult to consider, and the outdoor machine is easy to frost when being used as a heat pump, and the like, so that the heat pump type microchannel heat exchanger is difficult to enter a practical stage.
At present, two modes of external flow distribution or internal flow distribution are generally adopted for solving the problem of uneven distribution of gas and liquid phases, but two single flow distribution modes can not completely solve the problem of uneven distribution, for example, a common mode of external flow distribution is that a collecting pipe is divided into a plurality of chambers, then a flow divider is adopted for distributing each chamber in the collecting pipe, and the problem of uneven distribution of each chamber due to the fact that a flow equalization mechanism is not arranged in the collecting pipe is still not completely solved. For the independent in-pipe flow distribution mode, as 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 the gas-liquid phases in the inside, the distribution phase difference of the flow of the flat pipes at the near end and the far end in the collecting pipe is large, and the phenomenon of uneven flow distribution also exists.
At present, a related technology is proposed to address the above problems, for example, japanese patent No. JP 6493575 B1 discloses a microchannel heat exchanger with internal and external flow dividing of a collecting pipe, but the collecting pipe of the microchannel heat exchanger needs to be welded in three parts, the adopted spacer structure is complex, the assembly between the spacer and the spacer in the collecting pipe is difficult, and therefore, the process is complex, and the processing cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the micro-channel heat exchanger with the inside and outside split flow, which mainly solves the problems of uneven split flow and poor heat exchange performance of the heat exchanger of the micro-channel heat exchanger of the heat pump air conditioning system, and has the advantages of simple structure and processing technology, low cost and good split flow effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The utility model provides a microchannel heat exchanger with intraductal external reposition of redundant personnel, 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, first pressure manifold internal partition becomes a plurality of first cavity, all be provided with in the first cavity and draw the hole pipe, first pressure manifold bottom is provided with the reposition of redundant personnel mechanism, the refrigerant is passed through the reposition of redundant personnel of reposition of redundant personnel mechanism back gets into a plurality of in the first cavity. Through combining two kinds of reposition of redundant personnel modes outside the pipe and in the pipe, use 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 has the injection effect in each first cavity inside to shunt further, has promoted the gas-liquid homogeneity of microchannel heat exchanger, has improved the heat transfer ability of microchannel heat exchanger.
Further, a plurality of separation mechanisms are arranged in the first collecting pipe, and the separation mechanisms divide the first collecting pipe into a plurality of first cavities. The first collecting pipe is divided into a plurality of first cavities through the separation mechanism, the same flow can be respectively fed into different first cavities to be subjected to next-step flow division, and the first cavities serve as places for further flow division, so that the flow division of the refrigerant is ensured to be more uniform.
Further, the separation mechanism comprises a first separation piece and a second separation piece, a second cavity is formed between the first separation piece and the second separation piece, an opening is formed in the first separation piece, a hole is formed in the second separation piece, and the hole is correspondingly arranged at the position close to the pipe wall of the first collecting pipe. The hole on the second spacer can be used for introducing the refrigerant which is preliminarily split by the splitting mechanism into the second cavity, the position of the hole can be adaptively adjusted according to the flow direction of the refrigerant, the refrigerant enters the first cavity through the opening on the first spacer after being introduced into the second cavity, and the refrigerant is split in the first cavity through the injection hole pipe.
Further, a plurality of third spacers are arranged in the second collecting pipe, and the third spacers divide the second collecting pipe into a plurality of third cavities. The refrigerant transmitted through the pipe body is received through the plurality of third cavities, so that the refrigerant is uniformly distributed in different third cavities, and the refrigerating effect of the air conditioner is improved; the same high-temperature gaseous refrigerant transmitted by the air inlet pipe can be received, and then the high-temperature gaseous refrigerant is uniformly transmitted to the fins for heat exchange, so that the heating effect of the air conditioner is improved.
Further, 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. When the refrigerant flows through the injection hole pipe, negative pressure is generated at the injection hole at the bottom of the injection hole pipe, the gas-liquid refrigerant near the injection hole is injected into the injection hole pipe through the injection hole to be mixed with the main flow path refrigerant, so that the gas-liquid refrigerant in each first cavity can automatically circulate, the gas-liquid refrigerant in the first cavity is fully and uniformly mixed, meanwhile, the phenomenon of liquid accumulation at the bottom of the first cavity due to the action of gravity can be avoided, and the injection side holes formed in the injection hole pipe can ensure the flow uniformity of the refrigerant.
Further, the injection side holes are arranged in a plurality and are uniformly distributed at intervals from bottom to top, and the aperture of the injection side holes is gradually reduced from bottom to top. The shape of the injection hole pipe is of an inverted circular truncated cone structure, the pipe diameter of the bottom is smaller, and the injection side holes are gradually reduced from bottom to top to ensure the flow uniformity of gas-liquid refrigerant from different injection side holes.
Further, the pipe body is specifically a flat pipe. The flat tube is used for carrying out stable transmission of the refrigerant, so that the refrigerant can carry out sufficient heat exchange at the positions passing through the fins, and the heat exchange performance of the refrigerant is improved.
Further, the flow dividing mechanism comprises a flow divider and capillary tubes, and the flow divider is connected with the first collecting tube through a plurality of capillary tubes. The refrigerant is primarily separated through the diverter and the capillary tube, and the refrigerant is conveyed into different first cavities through the capillary tube after being diverted through the diverter tube, so that the primary diversion of the refrigerant is realized.
Further, the shunt is specifically a T-shaped shunt. Better and more uniform refrigerant diversion can be realized by adopting the T-shaped diverter, and the refrigerant enters from the bottom of the T-shaped diverter and is diverted from the top.
An air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, and a heat exchanger is arranged on the outdoor unit, and the heat exchanger is specifically a micro-channel heat exchanger with the split flow inside and outside a pipe.
The micro-channel heat exchanger with the inside and outside split flow and the air conditioner provided by the invention have the beneficial effects that: the two flow dividing modes of the outside and the inside of the pipe are combined, the flow dividing mechanism is used for dividing the outside of 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 injection effect is used for further dividing the inside of each first cavity, so that the gas-liquid uniformity of the microchannel heat exchanger is improved, and the heat exchanging capacity of the microchannel heat exchanger is improved; the T-shaped liquid separator is adopted for diversion outside the pipe, and the structure and the processing technology are simple, the cost is low and the diversion effect is good; the injection hole on the injection hole pipe enables the gas-liquid refrigerant in the first cavity to be fully and uniformly mixed, and meanwhile, the phenomenon of accumulated liquid at the bottom of the cavity due to the action of gravity can be avoided, the injection side hole is gradually reduced from bottom to top, and the flow uniformity of the gas-liquid refrigerant from different injection side holes is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of a portion of the present invention;
FIG. 3 is a schematic view of the structure of the ejector orifice tube of the present invention;
Fig. 4 is a schematic view of a first header structure according to the present invention in semi-section.
In the figure: 1. a first header; 2. a second header; 3. a flat tube; 4. a fin; 5. an ejector 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 introduction hole; 14. injecting a side hole; 15. a diversion cavity; solid arrows indicate refrigerant flow direction during refrigeration; the open arrows indicate the flow direction of the refrigerant during heating.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.
Example 1: a microchannel heat exchanger with in-tube and out-tube split flow.
As shown in fig. 1, a microchannel heat exchanger with in-tube and out-tube split, comprising: the device 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 separation mechanisms are arranged in the first collecting pipe 1; as shown in fig. 4, the partition mechanism divides the first collecting pipe 1 into a plurality of first cavities 6 ,, the partition mechanism comprises a first partition 7 and a second partition 8, a second cavity 12 is formed between the first partition 7 and the second partition 8, an opening is formed in the first partition 7, a hole is formed in the second partition 8, the hole is correspondingly arranged at a position close to the pipe wall of the first collecting pipe 1, and injection hole pipes 5 are arranged in the first cavities 6; as shown in fig. 3, the injection hole pipe 5 comprises an injection hole 13 and injection side holes 14, the injection hole pipe 5 is of an inverted circular truncated cone structure, the pipe diameter of the bottom is smaller, the injection hole 13 is arranged at the bottom of the injection hole pipe 5, the injection side holes 14 are arranged on the side surface of the injection hole pipe 5, the injection side holes 14 are provided with a plurality of injection holes and are uniformly distributed at intervals from bottom to top, and the aperture of the injection side holes 14 is gradually reduced from bottom to top.
As shown in fig. 2, a T-shaped flow divider 10 and a capillary tube 9 are arranged at the bottom of the first collecting pipe 1, the T-shaped flow divider 10 is connected with the bottom of the first collecting pipe 1 through the capillary tube 9, a plurality of third spacers 11 are arranged in the second collecting pipe 2, and the third spacers 11 divide the second collecting pipe 2 into a plurality of third cavities.
In this embodiment, during refrigeration, two-phase refrigerant firstly passes through the T-shaped shunt 10 and passes through the liquid separation capillary 9 and then enters the corresponding diversion cavity 15 respectively, and then enters the corresponding second cavity 12 formed by the first spacer 7 and the second spacer 8 from the diversion cavity 15 and then enters the injection hole pipe 5 of each first cavity 6 in the first collecting pipe 1, after the primary external-pipe diversion is realized by the T-shaped shunt 10, the primary external-pipe diversion is realized and then enters the injection hole pipe 5 through the liquid separation capillary 9, further in-pipe diversion is realized, one side of the injection hole pipe 5 is provided with gradually-increased injection side holes 14 from top to bottom, so that the flow rate of the refrigerant which is discharged from each injection side hole 14 and enters each flat pipe 3 is basically the same, and as the injection hole pipe 5 is adopted in the first cavity 6 of the first collecting pipe 1, the refrigerant at the bottom of the first cavity 6 is sucked into the injection hole pipe 5 through the injection hole 13 and mixed with the refrigerant which passes through the main path of the injection hole pipe 5 to circularly flow in the first cavity 6, thus the liquid accumulation phenomenon can be avoided, and meanwhile, the refrigerant at the bottom of the first cavity 6 can be better evenly distributed to the side holes 14 and then enter the heat exchange tube 2 through the second side holes to form the heat exchange tube after the heat exchange tube 2;
When heating, the flow directions of the refrigerants are opposite, at the moment, as the refrigerants entering the second collecting pipe 2 are gases, the problem of uneven liquid separation basically does not exist, the overheated gaseous refrigerants enter the second collecting pipe 2 from the air inlet pipe, and after heat exchange with air through the flat pipe 3, supercooled liquid refrigerants are formed to enter the first collecting pipe 1, and after passing through the injection hole pipe 5, the overheated gaseous refrigerants enter the liquid separation capillary 9 and the T-shaped flow divider 10.
The benefit of this embodiment lies in, divide into left and right two parts with the pressure manifold, make processing and assembly technology become simple and convenient, through set up the water conservancy diversion chamber 15 in first pressure manifold 1 inboard and replace outside overlength divide liquid capillary 9, make the function of pressure manifold abundanter and compacter, reduced the waste of the space that the heat exchanger occupies, because the circulation area of refrigerant reduces in the first pressure manifold 1, lead to flowing into the refrigerant velocity of flow increase of every first cavity 6, and then make 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, and a heat exchanger is arranged on the outdoor unit, and the heat exchanger is specifically a microchannel heat exchanger with split flow inside and outside a pipe as described in embodiment 1.
The foregoing is a preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, so that the equivalents and modifications can be made without departing from the spirit of the disclosure.
Claims (8)
1. The microchannel heat exchanger is characterized by comprising a first collecting pipe, a second collecting pipe, a pipe body and fins, wherein the first collecting pipe and the second collecting pipe are connected through the pipe body, the fins are arranged on the pipe body, the first collecting pipe is internally divided into a plurality of first cavities, injection hole pipes are arranged in the first cavities, a flow dividing mechanism is arranged at the bottom of the first collecting pipe, and refrigerant enters the first cavities after being divided by the flow dividing mechanism;
the injection hole pipe comprises an injection hole and an injection side hole, the injection hole is arranged at the bottom of the injection hole pipe, and the injection side hole is arranged on the side surface of the injection hole pipe;
the side injection holes are arranged in a plurality and are uniformly distributed at intervals from bottom to top, and the aperture of the side injection holes is gradually reduced from bottom to top.
2. The microchannel heat exchanger with in-tube and out-of-tube split as set forth in claim 1 wherein a plurality of separating mechanisms are disposed in said first header, said separating mechanisms separating said first header into a plurality of first cavities.
3. The microchannel heat exchanger with in-and-out tube split of claim 2 wherein 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 provided in the first spacer, a hole is provided in the second spacer, and the hole is correspondingly positioned proximate to the first header wall.
4. The microchannel heat exchanger with in-tube and out-of-tube split of claim 1 wherein a plurality of third spacers are disposed within the second header, the third spacers dividing the second header into a plurality of third cavities.
5. The microchannel heat exchanger with in-tube and out-of-tube splitting of claim 1, wherein the tube body is in particular a flat tube.
6. The microchannel heat exchanger with in-and-out tube split as claimed in claim 1, wherein the split mechanism comprises a splitter and capillaries, the splitter being connected to the first header by a plurality of capillaries.
7. The microchannel heat exchanger with in-tube and out-of-tube splitting of claim 6, wherein the splitter is embodied as a T-splitter.
8. An air conditioner comprising an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are connected through a pipeline, and the air conditioner is characterized in that a heat exchanger is arranged on the outdoor unit, and the heat exchanger is specifically a microchannel heat exchanger with split flow inside and outside a pipe as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070567.5A CN110887217B (en) | 2019-11-05 | 2019-11-05 | Microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911070567.5A CN110887217B (en) | 2019-11-05 | 2019-11-05 | Microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe and air conditioner |
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| Publication Number | Publication Date |
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| CN110887217A CN110887217A (en) | 2020-03-17 |
| CN110887217B true CN110887217B (en) | 2024-08-20 |
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| CN201911070567.5A Active CN110887217B (en) | 2019-11-05 | 2019-11-05 | Microchannel heat exchanger with inside and outside reposition of redundant personnel of pipe and air conditioner |
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| CN118844324A (en) * | 2024-09-25 | 2024-10-29 | 内蒙古绵雨生态园林绿化工程有限责任公司 | A tree water supply device and water saving method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278908B (en) * | 2011-09-16 | 2013-06-26 | 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 |
| CN105180518B (en) * | 2015-09-15 | 2018-09-18 | 珠海格力电器股份有限公司 | Collecting pipe, micro-channel heat exchanger with collecting pipe and air conditioning system |
| CN105299966B (en) * | 2015-11-17 | 2019-01-18 | 珠海格力电器股份有限公司 | Microchannel heat exchanger and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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