CN115235148B - Microchannel condenser and working method thereof - Google Patents
Microchannel condenser and working method thereof Download PDFInfo
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- CN115235148B CN115235148B CN202210930409.8A CN202210930409A CN115235148B CN 115235148 B CN115235148 B CN 115235148B CN 202210930409 A CN202210930409 A CN 202210930409A CN 115235148 B CN115235148 B CN 115235148B
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- liquid
- refrigerant
- collecting tube
- gas
- partition board
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
Abstract
A micro-channel condenser and a working method thereof are provided, wherein the micro-channel condenser comprises two liquid collecting pipes, flat pipes, fins, a ball valve, a distributor and five clapboards; when the flow rate of the refrigerant is large, it is important to perform gas-liquid separation on the gas-liquid two-phase refrigerant because the presence of the liquid phase deteriorates heat transfer, and when the flow rate of the refrigerant is small, the presence of the liquid phase accelerates the flow rate of the refrigerant, so that the gas-liquid does not need to be separated. According to the microchannel condenser and the working method thereof, provided by the invention, the separation efficiency can be effectively improved when the flow rate of the refrigerant is large, the gas-liquid separation can be realized when the flow rate of the refrigerant is small, different requirements of the microchannel condenser are met under different working conditions, and the heat exchange performance of the microchannel condenser is effectively improved.
Description
Technical Field
The invention relates to the technical field of micro-channel condensers, in particular to a micro-channel condenser and a working method thereof.
Background
Compared with the traditional finned tube heat exchanger, the microchannel heat exchanger has the advantages of high heat exchange efficiency, small volume, compact structure, small refrigerant filling amount, low production cost and the like, and is used as a condenser of a refrigeration system in a large scale.
When gas enters the microchannel condenser, liquid can appear along with gas condensation, liquid can form a liquid film on the inner wall of a pipe, and heat exchange of a gas refrigerant is blocked, so that gas-liquid separation is necessary, in a conventional microchannel condenser, gas-liquid separation is realized in a vertical liquid collecting pipe by utilizing the density difference of the liquid of the gas, the gas enters the upper heat exchange of the microchannel condenser due to low density, and the liquid enters the lower heat exchange of the microchannel condenser due to high density, but when the flow rate of the refrigerant is high, the gas can carry the liquid to enter the upper part of the microchannel condenser, and the separation efficiency is reduced. In addition, when the refrigerant flow path is small, the presence of liquid accelerates the flow rate of the refrigerant, thereby improving heat exchange efficiency, so that gas-liquid separation is not required at a small flow rate, but in a conventional microchannel condenser, the flow path is fixed, and gas and liquid are always separated. From the above analysis, it is known that the microchannel heat exchanger has many problems in terms of gas-liquid separation efficiency and when gas-liquid separation is performed.
Disclosure of Invention
Aiming at the problems of the micro-channel condenser in the prior art, the invention aims to provide a micro-channel condenser and a working method thereof, wherein a fourth clapboard 08 and a flow guide tube 09 are arranged in a second liquid collecting tube 07 to prevent gas carrying liquid from entering the upper part of the micro-channel condenser, thereby improving the separation efficiency; in addition, when the flow rate of the refrigerant is small, the ball valve 14 is closed, so that the refrigerant can only flow out from the first outlet 12, separation of gas and liquid is prevented, and the flow rate of the refrigerant side is increased, thereby improving the heat exchange performance of the micro-channel condenser.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a microchannel condenser comprises a first liquid collecting pipe 04, a second liquid collecting pipe 07, a plurality of flat pipes 06 arranged between the first liquid collecting pipe 04 and the second liquid collecting pipe 07 and communicated with the first liquid collecting pipe 04 and the second liquid collecting pipe 07, fins 05 arranged between adjacent flat pipes, a first baffle plate 02 arranged inside the first liquid collecting pipe 04 and 1/5-1/4 l away from the bottom of the first liquid collecting pipe 04, a second baffle plate 03 also arranged inside the first liquid collecting pipe 04 and 1/5-1/4 l away from the top end of the first liquid collecting pipe 04, an inlet 01 arranged between the first baffle plate 02 and the second baffle plate 03 and communicated with the first liquid collecting pipe 04, a third baffle plate 08 arranged inside the second liquid collecting pipe 07 and 1/10-1/8 l away from the top end of the second liquid collecting pipe 07, a fourth baffle plate 10 arranged inside the second liquid collecting pipe 07, and 1/5 to 1/4l from the top end of the second liquid collecting pipe 07, in addition, the fourth baffle 10 and the second baffle 03 are positioned on the same horizontal position, the fifth baffle 11 is arranged inside the second liquid collecting pipe 07, and 1/10 to 1/8l from the bottom of the second liquid collecting pipe 07, l is the height of the first liquid collecting pipe 04 and the second liquid collecting pipe 07, the flow guiding pipe 09 is arranged on the fourth baffle 10 and passes through the fourth baffle 10, the lower end of the flow guiding pipe 09 exceeds the fourth baffle 103-5mm, the length of the upper end of the flow guiding pipe 09 is half of the distance between the third baffle 08 and the fourth baffle 10, the diameter of the flow guiding pipe 09 is 1/6 to 1/4 of the diameter of the second liquid collecting pipe 07, the chambers of the lower ends of the first outlet 12 and the fifth baffle 11 are communicated, the chambers of the upper ends of the second outlet 13 and the third baffle 08 are communicated, the ball valve 14 is connected with the second outlet 13, the ball valve 14 and the first outlet 12 are both in communication with a dispensing head 15.
The fourth partition plate 10 and the flow guide pipe 09 are arranged to effectively separate the gas and the liquid in the second liquid collecting pipe 07; when the flow entering the first liquid collecting pipe 04 and the second liquid collecting pipe 07 is large, the separation efficiency of the gas-liquid two-phase refrigerant in the second liquid collecting pipe 07 is poor, the liquid-phase refrigerant enters the lower half part of the micro-channel condenser under the action of momentum, and a part of liquid is prevented from entering the upper half part of the micro-channel condenser by arranging the fourth partition plate 10 and the flow guide pipe 09, so that the separation efficiency of the gas and the liquid in the second liquid collecting pipe 07 is improved, and the performance of the micro-channel condenser is improved.
When the flow rate of the refrigerant is small, the flow rate of the refrigerant side is high due to the existence of the liquid, the heat exchange coefficient of the refrigerant side is improved, at this time, the gas and the liquid do not need to be separated, and the refrigerant can only flow out from the first outlet 12 by closing the ball valve 14, so that the function of no separation of the gas and the liquid is realized.
According to the working method of the microchannel condenser, gas enters the microchannel condenser through the inlet 01 and flows through the flat tube 06 between the first partition plate 02 and the second partition plate 03, liquid is formed, when the flow rate of the refrigerant is high, a layer of liquid film is formed on the inner wall of the flat tube due to the existence of the liquid, heat exchange on the refrigerant side is deteriorated, gas-liquid separation is carried out in the second liquid collecting tube 07, in the vertical second liquid collecting tube 07, the gas with low density enters the upper part of the microchannel condenser through the flow guide tube 09 for further condensation, the liquid with high density enters the lower part of the microchannel condenser and flows out through the first outlet 12, gas-liquid separation is realized under the action of gravity, when the flow rate of the refrigerant is low, the flow rate of the refrigerant is accelerated, the heat exchange coefficient of the refrigerant is improved, the liquid does not need to be separated, the refrigerant can only flow out from the first outlet 12 through closing the ball valve 14, and the function of gas-liquid separation is realized.
Compared with the prior art, the invention has the following advantages:
1. the invention provides a microchannel condenser and a working method thereof, which can prevent gas carrying liquid from entering the upper half part of the microchannel condenser and improve the gas-liquid separation efficiency of the microchannel condenser.
2. The invention provides a microchannel condenser and a working method thereof, which can control whether gas and liquid are separated according to the flow of a refrigerant, thereby improving the heat exchange performance of the microchannel condenser.
Drawings
Fig. 1 is a schematic diagram of a refrigerant flow in gas-liquid separation when the flow rate of the refrigerant in the micro-channel condenser is large.
Fig. 2 is a schematic diagram of a refrigerant flow in the micro-channel condenser according to the present invention when the gas and liquid are not separated when the flow rate of the refrigerant is small.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 and 2, a microchannel condenser comprises a first liquid collecting tube 04, a second liquid collecting tube 07, a plurality of flat tubes 06 arranged between the first liquid collecting tube 04 and the second liquid collecting tube 07 and communicated with the first liquid collecting tube 04 and the second liquid collecting tube 07, fins 05 arranged between adjacent flat tubes, a first baffle plate 02 arranged inside the first liquid collecting tube 04 and 1/5-1/4 l away from the bottom of the first liquid collecting tube 04, a second baffle plate 03 also arranged inside the first liquid collecting tube 04 and 1/5-1/4 l away from the top of the first liquid collecting tube 04, an inlet 01 arranged between the first baffle plate 02 and the second baffle plate 03 and communicated with the first liquid collecting tube 04, a third baffle plate 08 arranged inside the second liquid collecting tube 07 and 1/10-1/8 l away from the top of the second liquid collecting tube 07, a fourth baffle plate 10 arranged inside the second liquid collecting tube 07, and 1/5 to 1/4l from the top end of the second liquid collecting pipe 07, in addition, the fourth baffle 10 and the second baffle 03 are positioned on the same horizontal position, the fifth baffle 11 is arranged inside the second liquid collecting pipe 07, and 1/10 to 1/8l from the bottom of the second liquid collecting pipe 07, l is the height of the first liquid collecting pipe 04 and the second liquid collecting pipe 07, the flow guiding pipe 09 is arranged on the fourth baffle 10 and passes through the fourth baffle 10, the lower end of the flow guiding pipe 09 exceeds the fourth baffle 103-5mm, the length of the upper end of the flow guiding pipe 09 is half of the distance between the third baffle 08 and the fourth baffle 10, the diameter of the flow guiding pipe 09 is 1/6 to 1/4 of the diameter of the second liquid collecting pipe 07, the chambers of the lower ends of the first outlet 12 and the fifth baffle 11 are communicated, the chambers of the upper ends of the second outlet 13 and the third baffle 08 are communicated, the ball valve 14 is connected with the second outlet 13, the ball valve 14 and the first outlet 12 are both in communication with a dispensing head 15.
The provision of the fourth separator 10 and the draft tube 09 allows for efficient separation of gas and liquid in the second header 07. When the flow entering the first liquid collecting pipe 04 and the second liquid collecting pipe 07 is larger, the separation efficiency of the gas-liquid two-phase refrigerant in the second liquid collecting pipe 07 is poorer, the liquid-phase refrigerant enters the lower half part of the micro-channel condenser under the action of momentum, and a part of liquid can be prevented from entering the lower half part of the micro-channel condenser by arranging the fourth partition plate 10 and the flow guide pipe 09, so that the separation efficiency of the gas and the liquid in the second liquid collecting pipe 07 is improved, and the performance of the micro-channel condenser is improved. When the flow rate of the refrigerant is small, as shown in fig. 2, the gas and the liquid do not need to be separated, and the ball valve 14 is closed so that the refrigerant can only flow out from the first outlet 12.
Gas enters the microchannel condenser through the inlet 01, is condensed and liquid is generated when the gas flows through the flat tube 06 between the first partition 02 and the second partition 03, when the flow rate of the refrigerant is large, the heat transfer of the refrigerant side is deteriorated by the existence of the liquid, so that the gas-liquid separation in the second liquid collecting tube 07 is very important, the gas with smaller density enters the upper part of the microchannel condenser, the liquid with larger density enters the lower part of the microchannel condenser, the performance of the microchannel condenser can be remarkably improved through the gas-liquid separation, but when the flow rate of the refrigerant is large, a part of the liquid is carried by the gas into the upper part of the microchannel condenser, and the gas-liquid separation efficiency can be further improved by the fourth partition 08 and the guide tube 09 in the second liquid collecting tube 07; when the refrigerant flow path is small, it is unnecessary to separate the liquid because the presence of the liquid accelerates the flow rate of the refrigerant, thereby improving the heat exchange performance, and the function of gas-liquid separation can be achieved by closing the ball valve 14.
Claims (2)
1. A microchannel condenser, characterized by: the novel liquid-collecting device comprises a first liquid-collecting tube (04), a second liquid-collecting tube (07), a plurality of flat tubes (06) which are arranged between the first liquid-collecting tube (04) and the second liquid-collecting tube (07) and are communicated with the first liquid-collecting tube (04) and the second liquid-collecting tube (07), fins (05) which are arranged between the adjacent flat tubes, a first partition board (02) is arranged inside the first liquid-collecting tube (04) and is separated from the bottom 1/5-1/4 of the first liquid-collecting tube (04), a second partition board (03) is also arranged inside the first liquid-collecting tube (04) and is separated from the top 1/5-1/4 of the first liquid-collecting tube (04), an inlet (01) is arranged between the first partition board (02) and the second partition board (03) and is communicated with the first liquid-collecting tube (04), a third partition board (08) is arranged inside the second liquid-collecting tube (07) and is separated from the top 1/10-1/8 of the second liquid-collecting tube (07), a fourth partition board (10) is arranged inside the second liquid-collecting tube (07) and is separated from the top 1/5-1/4 of the second liquid-collecting tube (07), the top 1/5-1/4 of the second liquid-collecting tube (07) is separated from the first liquid-collecting tube (07) and is separated from the top 1/2 top 1/2 of the second liquid-collecting tube (7) and the second liquid-collecting tube (11 is separated from the liquid-collecting tube (1, the flow guide pipe (09) is arranged on the fourth partition board (10) and penetrates through the fourth partition board (10), the lower end of the flow guide pipe (09) exceeds the fourth partition board (10) by 3-5mm, the length of the upper end of the flow guide pipe (09) is half of the distance between the third partition board (08) and the fourth partition board (10), the diameter of the flow guide pipe (09) is 1/6-1/4 of the diameter of the second liquid collecting pipe (07), the first outlet (12) is communicated with a cavity at the lower end of the fifth partition board (11), the second outlet (13) is communicated with a cavity at the upper end of the third partition board (08), the ball valve (14) is connected with the second outlet (13), and the ball valve (14) and the first outlet (12) are both communicated with the liquid separating head (15);
a fourth partition plate (10) and a flow guide pipe (09) are arranged to effectively separate gas and liquid in the second liquid collecting pipe (07); when the flow rate of the gas-liquid two-phase refrigerant entering the first liquid collecting pipe (04) and the second liquid collecting pipe (07) is high, the separation efficiency of the gas-liquid two-phase refrigerant in the second liquid collecting pipe (07) is poor, the liquid-phase refrigerant enters the lower half part of the microchannel condenser under the action of momentum, and a part of liquid is prevented from entering the upper half part of the microchannel condenser by arranging the fourth partition plate (10) and the flow guide pipe (09), so that the separation efficiency of the gas and the liquid in the second liquid collecting pipe (07) is improved, and the performance of the microchannel condenser is improved;
when the flow rate of the refrigerant is small, the flow rate of the liquid on the refrigerant side is larger, the heat exchange coefficient of the refrigerant side is improved, at the moment, gas and liquid do not need to be separated, and the refrigerant can only flow out from the first outlet (12) by closing the ball valve (14), so that the function of no separation of gas and liquid is realized.
2. A method of operating a microchannel condenser as set forth in claim 1, wherein: the gas enters the microchannel condenser through the inlet (01), and is condensed and liquid appears when flowing through the flat tube (06) between the first partition plate (02) and the second partition plate (03), when the flow rate of the refrigerant is high, a layer of liquid film is formed on the inner wall of the flat tube due to the existence of the liquid, heat exchange on the side of the refrigerant is deteriorated, so that gas-liquid separation is carried out in the second liquid collecting tube (07), in the vertical second liquid collecting tube (07), the gas with small density enters the upper part of the microchannel condenser through the flow guide tube (09) to be further condensed, the liquid with high density enters the lower part of the microchannel condenser and flows out through the first outlet (12), the gas-liquid separation is realized under the action of gravity, when the flow rate of the refrigerant is low, the flow rate of the refrigerant is accelerated, the heat exchange coefficient of the refrigerant is improved, the liquid does not need to be separated, and the refrigerant can only flow out from the first outlet (12) through closing the ball valve (14) to realize the function of gas-liquid separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210930409.8A CN115235148B (en) | 2022-08-03 | 2022-08-03 | Microchannel condenser and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210930409.8A CN115235148B (en) | 2022-08-03 | 2022-08-03 | Microchannel condenser and working method thereof |
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| CN115235148A CN115235148A (en) | 2022-10-25 |
| CN115235148B true CN115235148B (en) | 2023-06-23 |
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| CN202210930409.8A Active CN115235148B (en) | 2022-08-03 | 2022-08-03 | Microchannel condenser and working method thereof |
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Citations (10)
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|---|---|---|---|---|
| KR20010029348A (en) * | 1999-09-30 | 2001-04-06 | 황한규 | Condenser for heat exchanger |
| US6330810B1 (en) * | 2000-08-11 | 2001-12-18 | Showa Denko K.K. | Condensing apparatus for use in a refrigeration cycle receiver-dryer used for said condensing apparatus |
| KR20030047002A (en) * | 2001-12-07 | 2003-06-18 | 한라공조주식회사 | Condenser |
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| CN102278908A (en) * | 2011-09-16 | 2011-12-14 | 四川长虹空调有限公司 | Microchannel heat exchanger |
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| CN203605514U (en) * | 2013-11-13 | 2014-05-21 | 南京师范大学 | Air-cooling compression condensing unit of microchannel heat exchanger |
| CN111059800A (en) * | 2019-11-27 | 2020-04-24 | 珠海格力电器股份有限公司 | Microchannel condenser assembly, microchannel condenser and air conditioner |
| CN111238090A (en) * | 2020-01-09 | 2020-06-05 | 西安交通大学 | Micro-channel evaporator and control method thereof |
| CN214470255U (en) * | 2021-02-09 | 2021-10-22 | 北京建筑材料检验研究院有限公司 | Micro-channel heat exchanger |
-
2022
- 2022-08-03 CN CN202210930409.8A patent/CN115235148B/en active Active
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| KR20010029348A (en) * | 1999-09-30 | 2001-04-06 | 황한규 | Condenser for heat exchanger |
| US6330810B1 (en) * | 2000-08-11 | 2001-12-18 | Showa Denko K.K. | Condensing apparatus for use in a refrigeration cycle receiver-dryer used for said condensing apparatus |
| KR20030047002A (en) * | 2001-12-07 | 2003-06-18 | 한라공조주식회사 | Condenser |
| KR20090046032A (en) * | 2007-11-05 | 2009-05-11 | 주식회사 두원공조 | Receiver drier of one unit with condenser |
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| CN203605514U (en) * | 2013-11-13 | 2014-05-21 | 南京师范大学 | Air-cooling compression condensing unit of microchannel heat exchanger |
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