CN203216165U - Supercooling device applied to natural cold source magnetic levitation refrigerating system - Google Patents

Supercooling device applied to natural cold source magnetic levitation refrigerating system Download PDF

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Publication number
CN203216165U
CN203216165U CN 201320185224 CN201320185224U CN203216165U CN 203216165 U CN203216165 U CN 203216165U CN 201320185224 CN201320185224 CN 201320185224 CN 201320185224 U CN201320185224 U CN 201320185224U CN 203216165 U CN203216165 U CN 203216165U
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China
Prior art keywords
supercooling
natural cooling
cooling source
magnetic suspension
compressor
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Expired - Lifetime
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CN 201320185224
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Chinese (zh)
Inventor
王凌云
王继鸿
许海进
袁祎
宿平
张卫星
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Nanjing Canatal Data Centre Environmental Tech Co Ltd
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Nanjing Canatal Air Condition Elect & Mech Co Ltd
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Abstract

The utility model discloses a supercooling device applied to a natural cold source magnetic levitation refrigerating system. The supercooling device comprises an evaporator, a magnetic levitation compressor, a preliminary supercooling section and a secondary supercooling section. An outlet of the evaporator is connected with an air suction port of the magnetic levitation compressor. The preliminary supercooling section comprises refrigerant system coils and natural cold source coils. Part of condenser pipes in the natural cold source coils serve as preliminary supercooling pipes. An exhaust port of the magnetic levitation compressor is sequentially communicated with the refrigerant system coils and the preliminary supercooling pipes. Remaining condenser pipes in the natural cold source coils are used for secondary refrigerant cooling. Liquid outlets of the preliminary supercooling pipes are sequentially connected with an inlet of the secondary supercooling section and an inlet of the evaporator through a pipeline. Meanwhile, branch circuits are arranged at the liquid outlets of the preliminary supercooling pipes and connected with a cooling inlet of a motor of the magnetic levitation compressor. The supercooling device applied to the natural cold source magnetic levitation refrigerating system is simple and reliable in structure, achieves the purpose of secondary supercooling, obtains a higher supercooling degree, improves refrigerating capacity of unit refrigerant, reduces the filling amount of the refrigerant and the usage amount of copper pipes of a heat exchanger, and improves energy efficiency of a set.

Description

A kind of supercooling apparatus that is applied to natural cooling source magnetic suspension refrigeration system
Technical field
The utility model belongs to the air conditioner refrigerating technology, relates 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 utility model, 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 under the condition of whole year operation, operation at part load, unit has degree of supercooling preferably, and then promotes 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 utility model provides 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 adopted in the utility model 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 utility model 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 utlity model has following advantage: 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 utility model 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 utility model embodiment 1 described secondary supercooling apparatus;
Fig. 2 is the structural representation of the utility model embodiment 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 utility model, should understand these embodiment only is used for explanation the utility model and is not used in restriction scope of the present utility model, after having read the utility model, 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 utility model.
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 utility model 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 utility model 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 the natural cooling source that the utility model 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.
CN 201320185224 2013-04-12 2013-04-12 Supercooling device applied to natural cold source magnetic levitation refrigerating system Expired - Lifetime CN203216165U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103206814A (en) * 2013-04-12 2013-07-17 南京佳力图空调机电有限公司 Supercooling device for magnetic suspension refrigerating system with natural cold source
CN108444122A (en) * 2018-02-09 2018-08-24 珠海格力电器股份有限公司 Air-conditioning system
CN115183483A (en) * 2022-08-02 2022-10-14 鹏鸟科技(山东)有限公司 Water-cooling centrifugal phase-change refrigeration equipment with natural cold source

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103206814A (en) * 2013-04-12 2013-07-17 南京佳力图空调机电有限公司 Supercooling device for magnetic suspension refrigerating system with natural cold source
CN103206814B (en) * 2013-04-12 2015-12-23 南京佳力图空调机电有限公司 A kind of supercooling apparatus being applied to natural cooling source magnetic suspension refrigeration system
CN108444122A (en) * 2018-02-09 2018-08-24 珠海格力电器股份有限公司 Air-conditioning system
WO2019153881A1 (en) * 2018-02-09 2019-08-15 珠海格力电器股份有限公司 Air conditioning system
CN115183483A (en) * 2022-08-02 2022-10-14 鹏鸟科技(山东)有限公司 Water-cooling centrifugal phase-change refrigeration equipment with natural cold source

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C56 Change in the name or address of the patentee
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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 DATA-CENTRE ENVIRONMENTAL TECH Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20130925