CN1220015C - Air-cooled air-condition finned tube evaporator of two-stage vapour-liquid separation - Google Patents
Air-cooled air-condition finned tube evaporator of two-stage vapour-liquid separation Download PDFInfo
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- CN1220015C CN1220015C CN 200410016873 CN200410016873A CN1220015C CN 1220015 C CN1220015 C CN 1220015C CN 200410016873 CN200410016873 CN 200410016873 CN 200410016873 A CN200410016873 A CN 200410016873A CN 1220015 C CN1220015 C CN 1220015C
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- current divider
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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
- F25B39/02—Evaporators
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to an air-cooled air-condition finned tube evaporator of two-stage vapor-liquid separation, which mainly comprises an evaporator heat exchange part and a two-stage vapor-liquid separation current divider. Two-phase refrigeration agents flow in a primary separation current divider for vapor liquid separation firstly, and separated refrigeration agent liquid is distributed to primary branch lines for evaporation and heat exchange. The vapor of the refrigeration agents pass through an air suction pipe. According to the reasonable structure design, evaporation and heat exchange are carried out on the liquid which enters the primary branch lines, the dryness of the liquid reaches about 0.5 at the outlet of a primary branch line, and the liquid is newly collected to a secondary separation current divider for vapor liquid separation once more. The separated refrigeration agent liquid is distributed to secondary branch lines for evaporation and heat exchange, and the vapor of the refrigeration agents pass through the air suction pipe. The vapor of the refrigeration agents are successively separated and pass through the air suction pipe twice at the inlet of the evaporator and in a middle position of a flow process, and two-stage heat exchange evaporation of different division lines is carried out on the separated liquid so as to reduce the pressure drop of the evaporator. The present invention improves heat exchange efficiency and simplifies the number of division lines and heat exchanging pipes of the evaporator.
Description
Technical field
What the present invention relates to is a kind of air-cooled air-conditioner finned-tube evaporator, particularly a kind ofly can simplify the heat exchanger tube number of evaporimeter and reduce the air-cooled air-conditioner fin pipe evaporator of evaporimeter along the two-stage vapor-liquid separation of journey pressure drop, belongs to refrigeration technology field.
Background technology
The finned-tube evaporator that is used for air-cooled air-conditioner generally adopts shunt structure, the vapour-liquid two phase refrigerant of promptly low mass dryness fraction through a flow distributor after, divide several roads to enter evaporimeter and carry out heat exchange, heat absorption evaporation at last becomes overheated gas and remerges Cheng Yilu, enters compressor through air intake duct.The use traffic distributor is to wish that the distribution of flow is even as far as possible.Yet because the cold-producing medium of participating in the distribution is in the moving state of complicated stream-liquid two-phase flow, it is very big directly the two phase refrigerant flow to be averaged the difficulty of distribution.In addition, because cold-producing medium is evaporating in the endothermic process along journey, the gas phase share constantly increases, and the gas phase share of increase has not had exchange capability of heat, causes that but the cold-producing medium flow velocity rises, and causes increasing along the journey pressure drop.
At present, in the prior art that the air-conditioner manufacturer is adopted, mainly be the inequality of improving assignment of traffic by the inclination angle of adjusting isocon at home and abroad; Falling when excessive when the evaporator refrigerant side pressure, then is to reduce pressure drop by the method that increases the branch way.Therefore, when evaporator flow is big, often need a lot of shunt, many more along separate routes, then the uniformity of assignment of traffic be cannot say for sure to demonstrate,prove more; On the other hand, can reduce the refrigerant side pressure drop, also reduce the coefficient of heat transfer of refrigerant side simultaneously although increase along separate routes.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, design provides a kind of novel two-stage vapor-liquid separation air-cooled air-conditioner fin pipe evaporator, can when improving assignment of traffic, reduce the evaporimeter pressure drop, improve the refrigerant side coefficient of heat transfer, and simplify the heat exchanger tube number of evaporimeter effectively.
The present invention includes feed pipe, the first order and separate that separating tube that current divider, the first order separate current divider, steam by-pass pipe, evaporimeter heat exchanging part (being made of with fin heat exchanger tube), the second level that the first order is separated current divider separate current divider, the separating tube of current divider, steam by-pass pipe, the air intake duct of second level separation current divider are separated in the second level.Arranged the flow distributor of two vapour-liquid separation types in the centre position of the inlet of evaporimeter and flow process, be referred to as the first order respectively and separate current divider and separate current divider with the second level.The two phase refrigerant of low mass dryness fraction flows into first order separation current divider earlier and carries out vapor-liquid separation, each branch road that refrigerant liquid after the separation is diverted to the first order carries out evaporation and heat-exchange, and the refrigerant vapour after separating does not almost have refrigerating capacity, directly by by-pass to evaporator outlet.According to reasonable structural design, the feasible refrigerant liquid that enters each branch road of the first order, through evaporation and heat-exchange, mass dryness fraction in first order branch road exit reaches about 0.5, the two phase refrigerant of each branch road is pooled to second level separation current divider and carries out vapor-liquid separation once more, refrigerant liquid after the separation is diverted to partial each branch road and carries out evaporation and heat-exchange, and the refrigerant vapour after separating directly is bypassed to evaporator outlet.
The present invention has significant advantage and good effect.
The first, twice in evaporator inlet place and flow process centre position of the present invention separates refrigerant gas and directly is bypassed to evaporator outlet, reduced significantly that the gas flow at high speed causes along the journey pressure drop.If keep overall presure drop constant, then the matter current density of each branch road is improved, thereby has improved the coefficient of heat transfer of refrigerant side.
The second, because separated the going out of a certain proportion of refrigerant gas do not participate in fluid interchange, under the constant prerequisite of the matter current density that keeps each branch road, can significantly reduce branch way and heat exchanger tube number.
The 3rd, after the employing vapor-liquid separation, the assignment of traffic during the vapour-liquid two-phase coexistent of the distribution ratio of fluid flow is a lot of easily.
In addition, the two-stage vapour liquid separator can be installed on the both sides of evaporimeter, and actual installation is comparatively convenient with maintenance.
Description of drawings
Fig. 1 is the structural principle schematic diagram of two-stage vapor-liquid separation evaporimeter of the present invention.
Among the figure, 1 is feed pipe, 2 are first order separation current divider, 3 separating tubes for first order separation current divider, 4 steam by-pass pipes for first order separation current divider, 5 are evaporimeter heat exchanging part (being made of heat exchanger tube and fin), 6 for separating current divider in the second level, 7 separating tubes for second level separation current divider, 8 steam by-pass pipes for second level separation current divider, 9 is air intake duct.
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention includes the separating tube 3 of feed pipe 1, first order separation current divider 2, first order separation current divider, steam by-pass pipe 4, evaporimeter heat exchanging part 5 (constituting), the air intake duct 9 that the first order is separated current divider, it is characterized in that also comprising that current divider 6 is separated in the second level, the separating tube 7 of current divider, the steam by-pass pipe 8 of second level separation current divider are separated in the second level by heat exchanger tube and fin; First order separation current divider 2 separates current divider 6 and vertically is arranged in evaporimeter heat exchanging part 5 both sides with the second level, feed pipe 1 separates current divider 2 with the first order import is joined, the separating tube 3 that the first order is separated current divider is installed in the bottom that the first order is separated current divider 2, separating tube 3 is connected with each branch road import of the first order of evaporimeter heat exchanging part 5, the steam by-pass pipe 4 that the first order is separated current divider is installed in the top that the first order is separated current divider 2, the steam by-pass pipe 4 that the first order is separated current divider is communicated with the air intake duct 9 of evaporator outlet, each way outlet of the first order of evaporimeter heat exchanging part 5 is communicated to the second level and separates current divider 6, the separating tube 7 that current divider is separated in the second level is installed in the bottom that current divider 6 is separated in the second level, the separating tube 7 that current divider is separated in the second level is connected with each branch road import of the second level of evaporimeter heat exchanging part 5, the steam by-pass pipe 8 that current divider is separated in the second level is installed in the top that current divider 6 is separated in the second level, the steam by-pass pipe 8 that current divider is separated in the second level is communicated with the air intake duct 9 of evaporator outlet, and each way outlet of the second level of evaporimeter heat exchanging part 5 is communicated to air intake duct 9.
Enter the first order through the low mass dryness fraction vapour-liquid two phase refrigerant after the throttling by feed pipe 1 and separate current divider 2, carry out the vapor-liquid separation first time.Refrigerant gas after the separation is connected to the air intake duct 9 of evaporator outlet by steam by-pass pipe 4, and the refrigerant liquid after separating carries out evaporation and heat-exchange through each branch road of the first order that separating tube 3 enters in the evaporimeter heat exchanging part 5.The two phase refrigerant that arrives each way outlet of the first order is compiled back inflow second level separation current divider 6 again, carries out the vapor-liquid separation second time.Refrigerant gas after the separation is connected to the air intake duct 9 of evaporator outlet by steam by-pass pipe 8, and the refrigerant liquid after separating carries out evaporation and heat-exchange through each branch road of the second level that separating tube 7 enters in the evaporimeter heat exchanging part 5, enters air intake duct 9 after all flashing to gas.
Claims (1)
1. the air-cooled air-conditioner fin pipe evaporator of a two-stage vapor-liquid separation, comprise that feed pipe (1), the first order are separated current divider (2), the first order is separated the separating tube (3) of current divider, steam by-pass pipe (4), evaporimeter heat exchanging part (5) (being made of heat exchanger tube and fin), the air intake duct (9) that the first order is separated current divider, it is characterized in that also comprising that current divider (6) is separated in the second level, the separating tube (7) of current divider, the steam by-pass pipe (8) that current divider is separated in the second level are separated in the second level; First order separation current divider (2) separates current divider (6) and vertically is arranged in evaporimeter heat exchanging part (5) both sides with the second level, feed pipe (1) separates current divider (2) with the first order import is joined, the separating tube (3) that the first order is separated current divider is installed in the bottom that the first order is separated current divider (2), the separating tube (3) that the first order is separated current divider is connected with each branch road import of the first order of evaporimeter heat exchanging part (5), the steam by-pass pipe (4) that the first order is separated current divider is installed in the top that the first order is separated current divider (2), the steam by-pass pipe (4) that the first order is separated current divider is communicated with the air intake duct (9) of evaporator outlet, each way outlet of the first order of evaporimeter heat exchanging part (5) is communicated to the second level and separates current divider (6), the separating tube (7) that current divider is separated in the second level is installed in the bottom that current divider (6) is separated in the second level, the separating tube (7) that current divider is separated in the second level is connected with each branch road import of the second level of evaporimeter heat exchanging part (5), the steam by-pass pipe (8) that current divider is separated in the second level is installed in the top that current divider (6) is separated in the second level, the steam by-pass pipe (8) that current divider is separated in the second level is communicated with the air intake duct (9) of evaporator outlet, and each way outlet of the second level of evaporimeter heat exchanging part (5) is communicated to air intake duct (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016873 CN1220015C (en) | 2004-03-11 | 2004-03-11 | Air-cooled air-condition finned tube evaporator of two-stage vapour-liquid separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016873 CN1220015C (en) | 2004-03-11 | 2004-03-11 | Air-cooled air-condition finned tube evaporator of two-stage vapour-liquid separation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560543A CN1560543A (en) | 2005-01-05 |
| CN1220015C true CN1220015C (en) | 2005-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410016873 Expired - Fee Related CN1220015C (en) | 2004-03-11 | 2004-03-11 | Air-cooled air-condition finned tube evaporator of two-stage vapour-liquid separation |
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| CN (1) | CN1220015C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008151500A1 (en) * | 2007-06-15 | 2008-12-18 | Tsinghua University | A gas-liquid separating method and a gas-liquid separating type evaporator |
| CN104034095B (en) * | 2014-06-23 | 2016-08-24 | 佛山市顺德区君胜电器实业有限公司 | Gas-liquid separated vaporizer |
| CN104236173B (en) * | 2014-09-19 | 2017-04-05 | 西安交通大学 | A kind of wind-cooled evaporator with gas-liquid separator |
| CN104729133A (en) * | 2015-03-24 | 2015-06-24 | 西安交通大学 | Double gas-liquid separator efficiency increasing and refrigerating circulating system for two-temperature direct-cooling refrigerator |
| CN105841406A (en) * | 2016-05-09 | 2016-08-10 | 珠海格力电器股份有限公司 | Heat exchange device, air conditioner and heat pump |
| CN107062705A (en) * | 2016-12-06 | 2017-08-18 | 广东美芝制冷设备有限公司 | Heat-exchanger rig and the refrigeration system with it |
| CN107917523B (en) * | 2017-10-25 | 2019-12-20 | 西安交通大学 | Outdoor heat exchanger for heat pump and control method thereof |
| CN108362029B (en) * | 2018-02-06 | 2020-02-11 | 西安交通大学 | Gas-liquid separator auxiliary air conditioner system and control method thereof |
| CN108332452A (en) * | 2018-03-15 | 2018-07-27 | 青岛大学 | A kind of bionical inflation type evaporator of evaporator as a whole |
| CN108759181A (en) * | 2018-07-02 | 2018-11-06 | 天津商业大学 | Dry type shell and tube evaporator with eddy flow bleed liquid-dividing head |
| CN108709337A (en) * | 2018-07-02 | 2018-10-26 | 天津商业大学 | Cooling air formula evaporator with eddy flow bleed liquid-dividing head |
| CN109900004B (en) * | 2019-02-20 | 2024-03-26 | 仲恺农业工程学院 | Two-stage compression adjustable dryness refrigerating system with ejector |
-
2004
- 2004-03-11 CN CN 200410016873 patent/CN1220015C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1560543A (en) | 2005-01-05 |
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