A kind of energy-saving air conditioning system
The utility model relates to a kind of energy-saving air conditioning system, refers to a kind of energy-saving air conditioning system that has the refrigerated medium pump circulation especially.
In data center, the energy consumption of air conditioner in machine room has accounted for more than 40% of total energy consumption, and proportion is quite big, and therefore, the energy-saving run of air conditioner in machine room is the important breakthrough point of each operator's energy-saving and emission-reduction action.
The method of utilizing natural cooling source to freeze at present has energy-conservation Refrigeration Techniques such as traditional new wind, air heat exchange, glycol-cooled usually; And pump circularly cooling technology more and more receives the concern of industry because to make full use of under the high efficiency that cold-producing medium latent heat carries out heat exchange, the same refrigerating capacity pump circulating power ratio piston compressor operate power little a lot of and have advantages such as need not to destroy data center's wall body structure.
The existing normally integration pump circulation in original air conditioner in machine room refrigeration system of method that utilizes the pump circularly cooling; Utilize compressor cooling when outdoor environment temperature is higher; When outdoor environment temperature is lower, switch to pump and circulate and freeze, compressor and refrigerated medium pump utilize same set of evaporimeter and condenser.Not enough below this system exists:
1, integration pump circulation in original air conditioner in machine room refrigeration system must each refrigeration system all be disposed a cover pump circulatory system, the machine set system complex design, and cost is than higher, and customer investment is very big; Because same refrigeration system will be switched between pump operation and compressor operating, the reliability design meeting of air conditioner in machine room faces bigger challenge;
2, normally flow is bigger for the characteristics of refrigerated medium pump; And the flow of the single refrigeration system of air conditioner in machine room is also little usually, often all in the characteristic low discharge of refrigerated medium pump district, causes the operating point of pump own to depart from best operating point; The low load with strong power of promptly saying usually, efficient is had a greatly reduced quality;
3, because a shared cover evaporimeter and the condenser of the compressor assembly and the pump circulatory system need carry out switchover operation, can't realize moving simultaneously, when high heat density is used, can be greatly limited.
Summary of the invention
The purpose of the utility model is to solve the problem that exists in the above-mentioned prior art, proposes a kind of energy-saving air conditioning system that has the refrigerated medium pump circulation.
The energy-saving air conditioning system that the utility model proposes comprises the indoor set, off-premises station and the pump circulatory system that connect through pipeline, and described indoor set comprises compressor, evaporimeter, indoor fan and expansion valve; Described off-premises station comprises condenser and outdoor fan; The described pump circulatory system comprises successively fluid reservoir, the refrigerated medium pump that connects through pipeline, with the integrated multiplex pump circulating evaporator of the evaporimeter in the indoor set and with the integrated multiplex pump cycle condenser of the condenser in the off-premises station.
Compared with prior art, the utlity model has following advantage:
1 need not open air vent on body of wall, do not destroy the structure of body of wall, does not introduce new wind, can not cause harmful effect to building environment;
The 2 pumps circulation evaporimeters that join evaporimeter and indoor set integrate more, and pump circulation multi-connected cold condenser and outdoor condenser integrate, compact conformation, and installing space is little;
3 pump circulating evaporators adopt the forms that join more, a plurality of evaporator arrangement one cover pump circulatory systems, and the machine set system simplicity of design, it is much lower that cost is compared the conventional pump Cycle Unit, and customer investment is still less;
4 pump circulating evaporators adopt the modes that join more, make refrigerated medium pump in the operation down of big flow, make the operating point of pump more near best operating point, and the efficient height makes pump bring into play maximum effect.
Description of drawings
Below in conjunction with specific embodiment and accompanying drawing the utility model is carried out detailed explanation, wherein:
Fig. 1 is the flow chart of the utility model.
The specific embodiment
As shown in Figure 1, the energy-saving air conditioning system of the utility model design is made up of indoor set 1, off-premises station 6, the pump circulatory system and tube connector.Indoor set 1 comprises compressor 2, indoor fan 3, evaporimeter 4 and expansion valve 5.Off-premises station 6 comprises condenser 8 and outdoor fan 7.The pump circulatory system comprises outdoor pump cabinet 12, and fluid reservoir 13 and refrigerated medium pump 14 are installed in it; With the integrated multiplex pump circulating evaporator 17 of evaporimeter in the indoor set 4 and with the integrated multiplex pump cycle condenser 10 of the condenser 8 in the off-premises station.
Among the embodiment shown in Figure 1, a plurality of evaporimeters compose in parallel multiplex pump circulating evaporator 17, and an evaporimeter 4 in each pump circulating evaporator and the compressor assembly integrates, and magnetic valve 16 is installed on the feed tube of each pump circulating evaporator.A plurality of condensers compose in parallel multiplex pump cycle condenser 10, and a condenser 8 in each pump cycle condenser and the off-premises station integrates.Connect through tube connector 9 between the pump circulation many couplet evaporimeter of indoor set and the pump circulation multi-connected cold condenser of off-premises station.Connect through tube connector 11 between the pump circulation multi-connected cold condenser of off-premises station and the outdoor pump cabinet 12.Join between the evaporimeter of the pump circulation of outdoor pump cabinet 12 and indoor set connects through tube connector 15 more.The entire pump cycle refrigeration system provides power by refrigerated medium pump 14, accomplishes kind of refrigeration cycle.
The indoor pump circulation evaporimeter evaporimeters direct and compressor assembly that join integrate more, do not need to dispose independent indoor fan again.Outdoor pump circulation multi-connected cold condenser condenser direct and compressor assembly integrates, and does not need to dispose independent outdoor fan again.
The utility model also comprises a control device; Energy-saving air conditioning system can be automatically switched into according to factors such as heat load sizes in the indoor and outdoor surroundings temperature difference, the machine room utilize the operation of pump circularly cooling or utilize compression mechanism cold operation or pump circularly cooling and compressor cooling to move simultaneously, to reach the best efficiency operation of refrigeration system and to satisfy the high heat density operation of data center.
At outdoor environment temperature higher or indoor/outdoor temperature-difference less in, the pump circulatory system is out of service, closes refrigerated medium pump 14 and magnetic valve 16, uses compressor assembly as data center cold to be provided.
When the low perhaps indoor/outdoor temperature-difference of outdoor environment temperature was bigger, compressor refrigeration system was out of service, and the evaporimeter magnetic valves 16 that join are opened in refrigerated medium pump 14 starts more, utilize refrigerated medium pump for machine room cold to be provided.The path of the pump circulatory system is: refrigerated medium pump 14 → tube connector 15 → magnetic valve 16 → multiplex pump circulating evaporator 17 → tube connector 9 → multiplex pump cycle condenser 10 → tube connector 11 → fluid reservoir 13 → refrigerated medium pump 14, accomplish a circulation thus.In refrigerated medium pump operation, to store certain refrigerant liquid in the fluid reservoir all the time, and certain static pressure pressure head is provided with the liquid level discrepancy in elevation of refrigerated medium pump import, when guaranteeing pump operation thus cavitation can not appear.The height of fluid reservoir must be considered net positive suction head NPSH and the fluid reservoir of pump itself resistance to pipeline between pump inlet.The blower fan of off-premises station can speed governing operation, is not less than the dew-point temperature of return air in the data center with the fluid temperature that guarantees condensator outlet, guarantees that energy-conservation unit realizes the full sensible heat operation of evaporated condensation water.
In the utility model, the compressor assembly and the pump circulatory system adopt independently pipe-line system, do not interact, and have improved the reliability of system.
The energy-saving air conditioning system energy-saving effect that the utility model proposes is remarkable.Unit with 4 60kW is an example, is 0 ℃ at outdoor environment temperature, when adopting the compressor assembly operation, and the Energy Efficiency Ratio of every unit is 2.8～3.3; If adopt energy-saving type air conditioner of the present invention, compressor can be all out of service, and energy-saving type air conditioner is realized full sensible heat operation, and the Energy Efficiency Ratio of unit can reach more than 10.0, and energy-saving effect is obvious, can significantly reduce user's operating cost.
In the utility model, the evaporimeter of the pump circulatory system and condenser have adopted many modes, can realize big flow operation, and the operating point that makes pump is more near best efficiency point.And pump circulation many couplet evaporimeter and pump circulation multi-connected cold condenser can only dispose a refrigerated medium pump, move more energy-conservation.
The above is merely and illustrates, but not is restriction.Any spirit and category that does not break away from the utility model, and its equivalent modifications of carrying out or change are attached in claims of application after all should being contained in.