CN203605514U - Air-cooling compression condensing unit of microchannel heat exchanger - Google Patents
Air-cooling compression condensing unit of microchannel heat exchanger Download PDFInfo
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- CN203605514U CN203605514U CN201320714089.9U CN201320714089U CN203605514U CN 203605514 U CN203605514 U CN 203605514U CN 201320714089 U CN201320714089 U CN 201320714089U CN 203605514 U CN203605514 U CN 203605514U
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Abstract
The utility model provides an air-cooling compression condensing unit of a microchannel heat exchanger. A compressor, the heat exchanger, a draught fan, a liquid storage device, a dry filter, an electromagnetic valve, an expansion valve and an evaporator are sequentially connected to form a circulating system. The microchannel heat exchanger is used in the heat exchanger, and an oil separator is arranged between the compressor and the microchannel heat exchanger. The microchannel heat exchanger comprises an upper header pipe, a lower header pipe, a plurality of flat pipes arranged between the two header pipes, and fins arranged between the adjacent flat pipes. Two partition plates are arranged in the upper header pipe, and a partition plate is arranged in the middle of the lower header pipe. According to the air-cooling compression condensing unit of the microchannel heat exchanger, the microchannel heat exchanger is applied to the air-cooling compression condensing unit, the power consumption of the compressor is lowered, refrigerating capacity is increased, and thus the energy efficiency ratio of the system is improved; meanwhile, the air-cooling compression condensing unit can decrease the size of the condenser, lower the weight, save the usage amount of refrigerant and lower the cost, thereby strengthening product competitiveness.
Description
Technical field
The utility model relates to the air-cooled Condensing units of a kind of micro-channel heat exchanger, belongs to technical field of heat exchange.
Background technology
Energy-conservation is a very urgent task of current China economy and social development, along with the pursuit of consumer to high quality of products and the appearance of relevant decree, Performance Evaluation and prioritization scheme to Condensing units more and more draw attention, especially under the overall background of current promotion energy-saving and emission-reduction, how to improve unit efficiency level and seem more outstanding.Condensing units is the core component of freezing and refrigeration refrigeration system, huge as the common equipment usage quantity in refrigeration application, realize energy conservation object and improve its Energy Efficiency Ratio and be very important.
Heat exchanger is the important component part of refrigeration system, and the quality of its performance directly affects refrigeration and the energy consumption of system, and the pipe type heat exchanger heat transfer coefficient that current air-cooled Condensing units adopts is not high, and Energy Efficiency Ratio is relatively low.Therefore the research topic that research and develop that a kind of heat transfer coefficient is high, compact conformation, heat exchanger that cost is low becomes a focus is also an effective way that improves product competitiveness in the market and occupation rate.Micro-channel heat exchanger has little, the lightweight advantage of volume with respect to tubular type or plate type heat exchanger, and there is the features such as high heat transfer coefficient, high surface-volume ratio, the low heat transfer temperature difference, low flow resistance, be the new direction of current heat exchanger research and development, become a study hotspot in this field.
Micro-channel heat exchanger is with its efficient heat exchange property, compact structure form, just progressively be applied to business, family expenses refrigerating and air conditioning industry, freezing and refrigeration refrigeration system, it is applied in air-cooled Condensing units, can improves set heat exchange efficiency, reduce cold-producing medium use amount, reduce unit cost.Meanwhile, can promote the combination property of air-cooled Condensing units, improve product competitiveness, save the energy.As Chinese patent ZL200920063018.0 " based on the Condensing units of aluminum micro-channel air cooling condenser ", this utility model adopts aluminum micro-channel heat exchanger, reduce refrigerant charge, save material cost, but it is only to replace conventional tubular heat exchanger with micro-channel heat exchanger simply, thereby the distribution condition on refrigeration working medium in heat exchanger whether evenly, whether can form oil film on micro-channel heat exchanger and affect the problems such as heat transfer effect and be not discussed further, the effect of its Condensing units Energy Efficiency Ratio lifting need to probe into.
Summary of the invention
The problem such as the utility model is little for existing forced air cooled tube plate heat interchanger heat transfer coefficient, micro-channel heat exchanger passage is little, easily form oil film and refrigeration working medium flow distribution is inhomogeneous, provide a kind of micro-channel heat exchanger air-cooled Condensing units, micro-channel heat exchanger is applied in air-cooled Condensing units, reduce the power consumption of compressor, increase refrigerating capacity, thereby improve the Energy Efficiency Ratio of system.Meanwhile, this utility model can reduce volume, the weight reduction of condenser, saves refrigeration working medium use amount, reduces costs, thereby strengthens product competitiveness.In addition, together with the fin of micro-channel heat exchanger is integral solder with flat tube, fin is not easy damaged, and there is no galvano-cautery phenomenon, so unit performance is stable, and durable.
The technical solution adopted in the utility model is as follows:
The air-cooled Condensing units of a kind of micro-channel heat exchanger, connect to form successively the circulatory system by compressor, heat exchanger, blower fan, reservoir, device for drying and filtering, magnetic valve, expansion valve and evaporimeter, heat exchanger adopts micro-channel heat exchanger, and between compressor and micro-channel heat exchanger, oil eliminator is set; Described micro-channel heat exchanger comprises header, lower header, is arranged on several flat tubes between two headers and is arranged on the fin between adjacent flat tube; Two dividing plates are set in described upper header, and the centre of described lower header arranges a dividing plate.
Described compressor adopts high-efficiency freezing screw compressor.Described fin is louvered fin.
In vapour compression refrigeration system, ammonia steam in high pressure-temperature superheat state (or freon steam) after compression, due to discharge time flow velocity fast, temperature is high, part lubricating oil on cylinder wall, is subject to the effect of high temperature to form oil vapour and oil droplet particulate and refrigerant vapour is together discharged.And exhaust temperature is higher, flow velocity is faster, the lubricating oil of discharging is more.One deck oil film that can congeal on heat transfer wall in the time that lubricating oil enters micro-channel heat exchanger and evaporimeter with cold-producing medium, increases thermal resistance, thereby can make the heat-transfer effect of condenser and evaporimeter reduce, and reduces refrigeration.The entrance of the each passage of micro-channel heat exchanger is very little, and heat transfer wall is relatively large, if non-refuelling is divided, particularly outstanding on the impact of micro-channel heat exchanger: can to make oil return difficulty on the one hand, affect compressor service life, the oil film that the opposing party forms at heat transfer wall can reduce the refrigeration of micro-channel heat exchanger greatly.So the utility model arranges oil eliminator between compressor and micro-channel heat exchanger, so that by being blended in lubricating oil separation in refrigerant vapour out, better to bring into play the efficiency of micro-channel heat exchanger.
The flow process of micro-channel heat exchanger is arranged and flow distribution of refrigerant inhomogeneities affects very large on systematic function, but the flow process that merely increases heat exchanger can not improve its exchange capability of heat, too much flow process can reduce its exchange capability of heat on the contrary, this is the assignment of traffic inhomogeneities of cold-producing medium between each flat tube because multipaths does not improve significantly, although increased the mass flux of cold-producing medium, heat transfer coefficient is increased, but more flow process makes the pressure drop of cold-producing medium become large, and larger refrigerant pressure drop has worsened heat-transfer effect.Therefore, consider the VELOCITY DISTRIBUTION of air stream, the central area of heat exchanger has higher air velocity conventionally, thereby has higher exchange capability of heat, micro-channel heat exchanger is designed to cold-producing medium and is flowed into by centre.Meanwhile, add dividing plate in header, form variable flow structure, because cold-producing medium has phase transformation in heat exchanger, the cold-producing medium flat tube of every section of flow process is counted difference.The negative effect bringing in order to reduce flow distribution inequality, limits the length of each tube side.The utility model not only reduces the pressure drop of refrigerant side, also make the dischargeable capacity of condenser reasonably be utilized, can guarantee that cold-producing medium has higher flow velocity and surface coefficient of heat transfer in second half section and the supercooled liquid tagma of two-phase section, has improved total exchange capability of heat of unit simultaneously.
When unit operation, first high-temperature high-pressure refrigerant gas after compressor compression entered from the centre position of upper header by duct coupling, to obtain higher exchange capability of heat, then branch to each cold-producing medium flat tube that first pass comprises, the cold-producing medium converging in lower header is divided into two-way, enters respectively each cold-producing medium flat tube of the second flow process, the room air that refrigeration working medium and temperature are higher carries out heat exchange, cold is delivered to indoor by fin, air is carried out cooling, reaches the effect of refrigeration.In inflow, the two-way refrigeration working medium of header converges and after cold, enters reservoir, after choke valve decrease temperature and pressure, flows into evaporimeter, so constantly circulation.
The utility model has following some beneficial effect with respect to prior art:
1, in air-cooled Condensing units, adopt micro-channel heat exchanger, utilize its high heat-transfer performance, augmentation of heat transfer, when reducing compressor wasted work amount, refrigerating capacity increases, and refrigerant side and air wide pre. drop reduce, and the Energy Efficiency Ratio of system improves greatly.The optimal design of doing for the utility model makes whole refrigeration system stable simultaneously, has given full play to the advantage of micro-channel heat exchanger, has improved the overall performance of unit.
2, this novel micro-channel heat exchanger can be strengthened intraductal heat transfer, thereby machine volume is dwindled, and makes heat exchanger structure compactness, and weight also alleviates thereupon, and it is more convenient to install, use; The charging amount of cold-producing medium greatly reduces, and saves refrigeration working medium, is conducive to environmental protection when reducing heat exchanger cost.
3, micro-channel heat exchanger having a extensive future in air-cooled Condensing units, its application can promote the combination property of air-cooled Condensing units, strengthens the competitiveness of product, has also responded the call that national energy-saving reduces discharging.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of the air-cooled Condensing units of micro-channel heat exchanger.
Fig. 2 is the structure chart of micro-channel heat exchanger.
Fig. 3 is micro-channel heat exchanger flow of refrigerant schematic diagram.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the air-cooled Condensing units systematic schematic diagram of micro-channel heat exchanger, comprises compressor 1, oil eliminator 2, micro-channel heat exchanger 3, blower fan 4, reservoir 5, device for drying and filtering 6, magnetic valve 7.Condensing units and throttle mechanism and a complete refrigeration system of evaporimeter composition, the operation principle of refrigeration system is as follows: after being inhaled into compressor 1 by evaporimeter low-temp low-pressure gaseous refrigerant out, be compressed into high temperature and high pressure gas, after entering oil eliminator 2, enter again micro-channel heat exchanger 3, gaseous refrigerant at micro-channel heat exchanger 3 mesohigh high temperature is condensed into high pressure liquid refrigerant, through reservoir 5, device for drying and filtering 6, magnetic valve 7, after heating power expansion valve expenditure and pressure, enter evaporimeter again, seethe with excitement to vaporize at evaporimeter inner refrigerant absorption external heat and become low-temp low-pressure moist steam, after entering vapour liquid separator, sucked by compressor again.So circulation, thus make to be cooled object or environment temperature are minimized, and reach refrigeration object.
Fig. 2 is the structure chart of micro-channel heat exchanger, and cold-producing medium 8 enters from microchannel 34, carries out heat exchange with air 9.Described fin 33 is louvered fin.
As shown in Figure 3, the air-cooled Condensing units of this micro-channel heat exchanger, comprises dividing plate 31, upper header 32, lower header 35, is arranged on several flat tubes 34 between described two headers, is arranged on the fin 33 between adjacent flat tube.In upper header 32, be provided with two dividing plates 31, the centre position in lower header 35 is provided with a dividing plate 31.Upper header 32 is connected with one end of every flat tube 34 respectively, and the other end lower header 35 of every flat tube 34 connects.Because of cold-producing medium phase transformation, specific heat capacity reduces gradually, and every section of required flat tube is counted difference: while just entering condenser, refrigerant gas specific volume is large, and the flat tube number needing is maximum; Along with the condensation of cold-producing medium, specific volume reduces, and the flat tube number needing also reduces.
In the time of unit operation, the flow process of cold-producing medium in micro-channel heat exchanger is: refrigerant flow direction as shown by the arrows in Figure 3.First high-temperature high-pressure refrigerant gas after compressor 1 compression entered from the centre position of upper header 32 by duct coupling, to obtain higher exchange capability of heat, then branch to each cold-producing medium flat tube 34 that first pass comprises, as downward arrow direction in Fig. 3, the cold-producing medium converging in lower header 35 is divided into two-way, as arrow direction in Fig. 3, enter respectively each cold-producing medium flat tube of the second flow process, as in Fig. 3 to upward arrow direction, the room air that refrigeration working medium and temperature are higher carries out heat exchange, cold is delivered to indoor by fin 33, carry out cooling to air, reach the effect of refrigeration.In inflow, the two-way refrigeration working medium of header 32 converges and after cold, enters reservoir 5, after choke valve decrease temperature and pressure, flows into evaporimeter, so constantly circulation.
The air-cooled Condensing units of a kind of micro-channel heat exchanger of the utility model can augmentation of heat transfer, effectively improves system heat exchange property, and heat exchanger volume is little, lightweight simultaneously, and compact conformation, has reduced unit cost, has good application prospect.
Claims (3)
1. the air-cooled Condensing units of micro-channel heat exchanger, connect to form successively the circulatory system by compressor, heat exchanger, blower fan, reservoir, device for drying and filtering, magnetic valve, expansion valve and evaporimeter, it is characterized in that, heat exchanger adopts micro-channel heat exchanger, and between compressor and micro-channel heat exchanger, oil eliminator is set; Described micro-channel heat exchanger comprises header, lower header, is arranged on several flat tubes between two headers and is arranged on the fin between adjacent flat tube; Two dividing plates are set in described upper header, and the centre of described lower header arranges a dividing plate.
2. the air-cooled Condensing units of a kind of micro-channel heat exchanger according to claim 1, is characterized in that, described compressor adopts high-efficiency freezing screw compressor.
3. the air-cooled Condensing units of a kind of micro-channel heat exchanger according to claim 1 and 2, is characterized in that, described fin is louvered fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320714089.9U CN203605514U (en) | 2013-11-13 | 2013-11-13 | Air-cooling compression condensing unit of microchannel heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320714089.9U CN203605514U (en) | 2013-11-13 | 2013-11-13 | Air-cooling compression condensing unit of microchannel heat exchanger |
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| Publication Number | Publication Date |
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| CN203605514U true CN203605514U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320714089.9U Expired - Fee Related CN203605514U (en) | 2013-11-13 | 2013-11-13 | Air-cooling compression condensing unit of microchannel heat exchanger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115218298A (en) * | 2022-06-16 | 2022-10-21 | 上海伯涵热能科技有限公司 | Super-high energy efficiency dehumidifier with micro-channel heat exchanger adopted in condenser supercooling section |
| CN115235148A (en) * | 2022-08-03 | 2022-10-25 | 西安交通大学 | Micro-channel condenser and working method thereof |
| CN115355633A (en) * | 2022-05-20 | 2022-11-18 | 西安交通大学 | Variable-flow micro-channel heat exchanger and working method thereof |
-
2013
- 2013-11-13 CN CN201320714089.9U patent/CN203605514U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355633A (en) * | 2022-05-20 | 2022-11-18 | 西安交通大学 | Variable-flow micro-channel heat exchanger and working method thereof |
| CN115355633B (en) * | 2022-05-20 | 2023-08-08 | 西安交通大学 | Variable flow microchannel heat exchanger and working method thereof |
| CN115218298A (en) * | 2022-06-16 | 2022-10-21 | 上海伯涵热能科技有限公司 | Super-high energy efficiency dehumidifier with micro-channel heat exchanger adopted in condenser supercooling section |
| CN115235148A (en) * | 2022-08-03 | 2022-10-25 | 西安交通大学 | Micro-channel condenser and working method thereof |
| CN115235148B (en) * | 2022-08-03 | 2023-06-23 | 西安交通大学 | Microchannel condenser and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20151113 |
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| EXPY | Termination of patent right or utility model |