CN103206814A - Supercooling device for magnetic suspension refrigerating system with natural cold source - Google Patents
Supercooling device for magnetic suspension refrigerating system with natural cold source Download PDFInfo
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- CN103206814A CN103206814A CN2013101289847A CN201310128984A CN103206814A CN 103206814 A CN103206814 A CN 103206814A CN 2013101289847 A CN2013101289847 A CN 2013101289847A CN 201310128984 A CN201310128984 A CN 201310128984A CN 103206814 A CN103206814 A CN 103206814A
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Abstract
The invention discloses a supercooling device for a magnetic suspension refrigerating system with a natural cold source. The supercooling device comprises an evaporator, a magnetic suspension compressor, a primary supercooling section and a secondary supercooling section; an outlet of the evaporator is connected with an air suction port of the magnetic suspension compressor; the primary supercooling section comprises a coiled pipe of a refrigerant system and a coiled pipe of the natural cold source, a part of condenser pipes in the coiled pipe of the natural cold source is used as a primary supercooling pipe, an exhaust port of the magnetic suspension compressor is sequentially communicated with the coiled pipe of the refrigerant system and the primary supercooling pipe, and the remaining condenser pipes of the coiled pipe of the natural cold source are used for cooling refrigerating media; a liquid outlet of the primary supercooling pipe is sequentially connected with the secondary supercooling section and an inlet of the evaporator by pipelines; and a branch is arranged at the liquid outlet of the primary supercooling pipe and is connected with a cooling inlet of a motor of the magnetic suspension compressor. The supercooling device has the advantages that the supercooling device is simple and reliable in structure, the purpose of secondary supercooling is realized, a high degree of supercooling can be realized, the refrigerating capacity of unit refrigerants is improved, the refrigerant charge and consumption of copper pipes of a heat exchanger are reduced, and the energy efficiency of a unit is improved.
Description
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Technical field
The invention belongs to the air conditioner refrigerating technology, relate in particular to refrigeration compressor and natural cooling source associating handpiece Water Chilling Units.
Background technology
The policy that is accompanied by national energy-saving and emission-reduction is put into effect, utilize second low-temperature receiver and natural cooling source to become one of main energy-conservation means of air conditioner industry, especially air conditioner in machine room field because there is refrigeration demand the whole year in data center, is excessively utilizing the natural cooling source energy-saving effect can be more remarkable in season and winter.
The refrigeration demand of data center generally is the cooling needs from information technoloy equipment, use the data center of chilled water to carry out heat exchange by the chilled water in the chilled water plant and the air in the machine room, thereby the cooling in the realization machine room, (generally at 12-18 degree even higher) entered handpiece Water Chilling Units place lower the temperature (temperature is generally between 7-15) after water temperature raise.When outdoor temperature was low, the water that machine room comes out (12-18 degree) can carry out heat exchange with surrounding air directly or indirectly, thereby need not open compressor, reaches the purpose of free refrigeration, generally was referred to as natural cooling source or free low-temperature receiver.
Progress along with science and technology, information technoloy equipment can bear more and more higher temperature, therefore correspondingly the temperature of chilled water also can be used De Genggao, and in data center, can be by effective tissue of air-flow, make return air temperature higher, the rising of return air temperature also can promote chilled water, thereby improves the time of utilizing of natural cooling source.
Current traditional natural cooling source utilizes in the technology, generally concentrate on screw or vortex compression refrigerating system, because use air-cooled handpiece Water Chilling Units, on the structure and on the heat transfer mechanism, more be conducive to the utilization of natural cooling source, system also can be more simple, and therefore air-cooled unit uses natural cooling source more extensive.
But, unite centrifugal unit because a variety of causes (no secondary interface, absorbing gas belt liquid, capacity can't be applied in air-cooled unit etc. more greatly), can not adopt multistage supercooling apparatus, the basic condenser that adopts is crossed cold mode, can only adopt condenser a large amount of condenser pipes of arranging refrigerant to be carried out cold, fills the part refrigerant for improving effect more, it is limited that it crosses cold effect, can only be at the 3-4 degree, purpose just is to overcome resistance loss of pipeline, can't really be used for improving refrigerating capacity and efficiency aspect.
Traditional general cold of centrifugal unit is many, be subject to the size reason of air-cooled condenser, generally there is not air-cooled centrifugal water chillers (or natural cooling source handpiece Water Chilling Units), and traditional centrifugal unit does not generally need DC frequency conversion controller and motor are cooled off, and therefore degree of supercooling is not strict with.
In the control condensation temperature, to improve cold way, under the condition of existing heat transfer technology, general all is the area that needs corresponding increasing heat exchange coil, generally be to need to deepen row's number, perhaps strengthen front face area, but deepen the cost that row's number can strengthen heat exchanger, can make that the structure of unit is bigger than normal and strengthen front face area, and the increasing of front face area also can reduce face velocity, thereby the air side heat exchange also can weaken to some extent.
Product of the present invention, because the technology of natural cooling source is arranged, in order to promote the reliability of unit, the suitable part heat exchange coil that utilizes the natural cooling source coil pipe, thereby guarantee that under the condition of whole year operation, operation at part load, unit has degree of supercooling preferably, and then promote reliability of products.
Summary of the invention
Goal of the invention: at the problem and shortage of above-mentioned existing existence, the purpose of this invention is to provide a kind of secondary supercooling apparatus that is applied to the natural cooling source magnetic suspension system, the degree of supercooling that can utilize repeatedly supercooling apparatus to improve cold-producing medium is guaranteed magnetic suspension compressor safe and reliable operation, and reduces operating cost.
Technical scheme: for achieving the above object, the technical solution used in the present invention is a kind of supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system, comprises evaporimeter, magnetic suspension compressor and a super cooled sect; Described evaporator outlet is connected with the air entry of magnetic suspension compressor;
A described super cooled sect comprises refrigerant system coil pipe and natural cooling source coil pipe, the part condenser pipe is as a supercooling tube in the described natural cooling source coil pipe, described magnetic suspension exhaust outlet of compressor is communicated with refrigerant system coil pipe and a supercooling tube successively, and described natural cooling source coil pipe residue condenser pipe is used for refrigerant cools;
The liquid outlet of a described supercooling tube is connected with the import of evaporimeter by pipeline, and this pipeline is provided with the first throttle valve; The liquid outlet of a supercooling tube is provided with branch road simultaneously, and this branch road is connected with the cooling import of the motor of magnetic suspension compressor.
Further improve, the present invention also comprises the secondary super cooled sect, and this secondary super cooled sect is economizer, and it comprises inlet, liquid outlet, gas-liquid import and gas outlet; The liquid outlet of a super cooled sect is connected with the economizer inlet by pipeline; Be divided into first branch road and second branch road after the liquid outlet of secondary super cooled sect comes out, first is connected with evaporator, and this branch road is provided with the first throttle valve; Second branch road is provided with second choke valve, and is connected with the gas-liquid import, and described economizer gas outlet is connected by the air entry of pipeline with the magnetic suspension compressor.
Further, this device is provided with many covers super cooled sect in parallel.
As preferably, described first throttle valve and second choke valve all adopt electric expansion valve.
Further, also comprise the natural cooling source water system, this natural cooling source water system comprises two branch roads, and described natural cooling source coil pipe residue condenser pipe is located at wherein branch road, and the meet of two branch roads is provided with triple valve, and is connected with the cooling duct of evaporimeter.
Beneficial effect: compared with prior art, the present invention has the following advantages: in addition, adopted simple and reliable structure by using in natural cooling source magnetic suspension refrigeration system, realize the cold excessively purpose of secondary, acquisition improves unit refrigerant refrigerating capacity than conventional method high supercooling degree more, reduces coolant injection amount and heat exchanger copper pipe use amount, improve the unit efficiency, reach energy-conservation purpose.The present invention also has following characteristics in addition: 1, the combination of DC frequency-changing magnetic suspension Compressor Technology and natural cooling source technology is used; 2, compressor is used in operation reliably under the year round cooling operating mode: by liquid level control, and the motor Cooling Design, fan speed regulation is realized; 3, the energy-saving run of frequency-changeable compressor and natural cooling source cooperates: by rational circuit design, coil design, logic switching controls technology and compressor DC frequency-changing regulation technology; 4, the cooling of the motor of magnetic suspension unit is used: for the protection compressor electric motor, by rational circuit design, for compressor provides the liquid refrigerant cooling motor.
Description of drawings
Fig. 1 is the system principle schematic diagram of the embodiment of the invention 1 described secondary supercooling apparatus;
Fig. 2 is the structural representation of the embodiment of the invention 2 described secondary supercooling apparatus.
Wherein, magnetic suspension compressor 1, natural cooling source coil pipe 2, refrigerant system coil pipe 3, supercooling tube 4, evaporimeter 5, economizer 6, blower fan 7, triple valve 8, first throttle valve 9, second choke valve 10.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Embodiment 1
Shown in Fig. 1～2, a kind of supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system comprises evaporimeter, magnetic suspension compressor, super cooled sect, secondary super cooled sect and a natural cooling source water system; Described evaporator outlet is connected with the air entry of magnetic suspension compressor; A described super cooled sect comprises refrigerant system coil pipe and natural cooling source coil pipe, the part condenser pipe is as a supercooling tube in the described natural cooling source coil pipe, described magnetic suspension exhaust outlet of compressor is communicated with refrigerant system coil pipe and a supercooling tube successively, and described natural cooling source coil pipe residue condenser pipe is used for the refrigerating medium cooling; The liquid outlet of a described supercooling tube is connected with the import of secondary super cooled sect and evaporimeter successively by pipeline; Simultaneously the liquid outlet of a supercooling tube is provided with branch road, and is connected with the cooling import of the motor of magnetic suspension compressor.And described natural cooling source water system comprises two branch roads, and described natural cooling source coil pipe residue condenser pipe is located at wherein branch road, and the meet of two branch roads is provided with triple valve, and is connected with the cooling duct of evaporimeter.
The actual employing of secondary super cooled sect economizer realizes, it comprises inlet (F1), liquid outlet (F2), gas-liquid import (F3) and gas outlet (F4); The liquid outlet of a super cooled sect is connected with the economizer inlet by pipeline, is divided into first branch road and second branch road after liquid outlet comes out, and first branch road is provided with the first throttle valve, and is connected with evaporator; Second branch road is provided with second choke valve, and is connected with the gas-liquid import, and described economizer gas outlet is connected by the air entry of pipeline with the magnetic suspension compressor.The first throttle valve adopts electric expansion valve, and second choke valve adopts the ECO electric expansion valve.
Refrigerant system coil pipe in fact all is identical fin and tube type condenser with the natural cooling source coil pipe in the technique scheme, and shared blower fan.As shown in Figure 1, comprise 4 a covers super cooled sect in parallel, wherein all contain 3 * 50 condenser pipes in refrigerant system coil pipe and the natural cooling source coil pipe in super cooled sect of every cover, the present invention changes former 3 * 6 condenser pipes that belong in the natural cooling source coil pipe by pipeline, it is connected with the condenser pipe of refrigerant system coil pipe, thereby improve the degree of supercooling of cold-producing medium, and the cold-producing medium of guaranteeing to enter into the variable-frequency motor cooling import of magnetic suspension compressor is always liquid, thereby guarantees the reliable and stable work of magnetic suspension compressor.Therefore, the natural cooling source coil pipe bottom of the present invention outside refrigerant system coil pipe arranges once independently supercooling tube district, subcooler is set before the expansion valve throttling one time again, to reduce condensation temperature, reaching increases unit refrigerant refrigerating capacity, reduce coolant injection amount and material consumption, obtain higher efficiency and refrigerating capacity
In addition, the cold magnetic suspension refrigeration system of natural cooling source that the present invention proposes has three kinds of mode of operations:
(1) pure compression machine mode of operation: when outdoor temperature was higher than return water temperature, no natural cooling source can utilize, and this moment, unit was operated under the pattern of pure compression machine, provided whole refrigerating capacitys by compressor; Can the sacrificial section cold under this pattern, regulate triple valve control fraction backwater by 3 * 44 condenser pipes of natural cooling source coil pipe residue, the air channel that this moment, blower fan produced facings the wind by these 3 * 44 condenser pipes has cooling, thereby reduce the EAT of refrigerant system coil pipe, and then reduced condensing pressure, by this The Application of Technology, air-cooled magnetic suspension can be used under the various environmental working conditions reliably.
(2) compressor+natural cooling source cooperates operational mode: when outdoor temperature is lower than return water temperature, but outdoor temperature is enough not low, always the cold deficiency that provides of natural cooling source; Remaining 3 * 44 condenser pipes of the natural cooling source coil pipe that backwater is flowed through outdoor earlier, flow through again after warp and the outdoor heat exchange condensation channel of evaporimeter, replenish not enough part cold by DC frequency-changeable compressor, because DC frequency-changeable compressor is that stepless accent carries, therefore can realize the slitless connection with natural cooling source, the efficient characteristics of DC frequency-changeable compressor under sub-load and the utilization of free natural cooling source make that the efficient of unit is very high;
(3) pure natural cooling source pattern: when outdoor temperature was enough low, the cold of natural cooling source was very sufficient, and compressor need not to open, and all provides cold by natural cooling source, and unit operation is very efficiently under the pattern.
Claims (5)
1. a supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system is characterized in that: comprise evaporimeter, magnetic suspension compressor and a super cooled sect; Described evaporator outlet is connected with the air entry of magnetic suspension compressor;
A described super cooled sect comprises refrigerant system coil pipe and natural cooling source coil pipe, the part condenser pipe is as a supercooling tube in the described natural cooling source coil pipe, described magnetic suspension exhaust outlet of compressor is communicated with refrigerant system coil pipe and a supercooling tube successively, and described natural cooling source coil pipe residue condenser pipe is used for refrigerant cools;
The liquid outlet of a described supercooling tube is connected with the import of evaporimeter by pipeline, and this pipeline is provided with the first throttle valve; The liquid outlet of a supercooling tube is provided with branch road simultaneously, and this branch road is connected with the cooling import of the motor of magnetic suspension compressor.
2. according to the described supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system of claim 1, it is characterized in that: also comprise the secondary super cooled sect, this secondary super cooled sect is economizer, and it comprises inlet, liquid outlet, gas-liquid import and gas outlet; The liquid outlet of a super cooled sect is connected with the economizer inlet by pipeline; Be divided into first branch road and second branch road after the liquid outlet of secondary super cooled sect comes out, first is connected with evaporator, and this branch road is provided with the first throttle valve; Second branch road is provided with second choke valve, and is connected with the gas-liquid import, and described economizer gas outlet is connected by the air entry of pipeline with the magnetic suspension compressor.
3. according to the described supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system of claim 2, it is characterized in that: this device is provided with many covers super cooled sect in parallel.
4. according to the described supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system of claim 3, it is characterized in that: described first throttle valve and second choke valve all adopt electric expansion valve.
5. according to the described supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system of claim 1, it is characterized in that: also comprise the natural cooling source water system, this natural cooling source water system comprises two branch roads, described natural cooling source coil pipe residue condenser pipe is located at wherein branch road, and two the meet of branch road is provided with triple valve, and is connected with the cooling duct of evaporimeter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310128984.7A CN103206814B (en) | 2013-04-12 | 2013-04-12 | A kind of supercooling apparatus being applied to natural cooling source magnetic suspension refrigeration system |
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| CN201310128984.7A CN103206814B (en) | 2013-04-12 | 2013-04-12 | A kind of supercooling apparatus being applied to natural cooling source magnetic suspension refrigeration system |
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| CN103206814B CN103206814B (en) | 2015-12-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042953A (en) * | 2015-05-25 | 2015-11-11 | 珠海格力电器股份有限公司 | Method for increasing enthalpy by replenishing gas for economizer and air conditioning system |
| CN106152636A (en) * | 2016-08-30 | 2016-11-23 | 无锡雪浪环境科技股份有限公司 | A kind of energy-saving steam compression-type refrigeration blood circulation |
| CN107084460A (en) * | 2017-03-24 | 2017-08-22 | 广州番禺速能冷暖设备有限公司 | One kind refrigeration drives natural cooling cooling by wind with fluorine pump |
| CN107560207A (en) * | 2017-08-15 | 2018-01-09 | 珠海格力电器股份有限公司 | Screw-type water chiller and its control method |
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| CN203216165U (en) * | 2013-04-12 | 2013-09-25 | 南京佳力图空调机电有限公司 | Supercooling device applied to natural cold source magnetic levitation refrigerating system |
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Patent Citations (5)
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| JPH0510633A (en) * | 1991-07-04 | 1993-01-19 | Nippondenso Co Ltd | Condenser |
| KR100803145B1 (en) * | 2007-03-31 | 2008-02-14 | 엘지전자 주식회사 | Air conditioner |
| CN102032725A (en) * | 2010-12-08 | 2011-04-27 | 海尔集团公司 | Supercooling device, air conditioner with device and method for controlling refrigerant flow of air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042953A (en) * | 2015-05-25 | 2015-11-11 | 珠海格力电器股份有限公司 | Method for increasing enthalpy by replenishing gas for economizer and air conditioning system |
| CN106152636A (en) * | 2016-08-30 | 2016-11-23 | 无锡雪浪环境科技股份有限公司 | A kind of energy-saving steam compression-type refrigeration blood circulation |
| CN107084460A (en) * | 2017-03-24 | 2017-08-22 | 广州番禺速能冷暖设备有限公司 | One kind refrigeration drives natural cooling cooling by wind with fluorine pump |
| CN107560207A (en) * | 2017-08-15 | 2018-01-09 | 珠海格力电器股份有限公司 | Screw-type water chiller and its control method |
| CN107560207B (en) * | 2017-08-15 | 2023-09-12 | 珠海格力电器股份有限公司 | Screw type water chilling unit and control method thereof |
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| CN103206814B (en) | 2015-12-23 |
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Address after: 211111 Jiangning economic and Technological Development Zone, Jiangsu, Jiangsu Province, the source of the road, No. 88, No. Patentee after: NANJING CANATAL DATA-CENTRE ENVIRONMENTAL TECH CO., LTD. Address before: 211102 Jiangning economic and Technological Development Zone, Jiangsu, Meilin street, No. 83, No. Patentee before: Nanjing Canatal Air Condition Elect. & Mech. Co., Ltd. |