CN201072191Y - Cooling cycle system of communication machine room - Google Patents
Cooling cycle system of communication machine room Download PDFInfo
- Publication number
- CN201072191Y CN201072191Y CNU2007201210905U CN200720121090U CN201072191Y CN 201072191 Y CN201072191 Y CN 201072191Y CN U2007201210905 U CNU2007201210905 U CN U2007201210905U CN 200720121090 U CN200720121090 U CN 200720121090U CN 201072191 Y CN201072191 Y CN 201072191Y
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- heat exchanger
- low
- pressure liquid
- indoor
- oil storage
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Abstract
The utility model provides a refrigeration circulating system of a communication machine room. An outdoor unit comprises an outdoor heat exchanger, and an indoor unit comprises an indoor throttling mechanism, an indoor heat exchanger, and a compressor; wherein the outlet opening of the indoor throttling mechanism is mutually connected with the inlet opening of the indoor heat exchanger, and the air suction pipe and the air exhaust pipe of the compressor are respectively and mutually connected with the side refrigerant outlet opening of the indoor heat exchanger and the side refrigerant inlet opening of the outdoor heat exchanger; the outdoor unit also comprises an outdoor throttling mechanism, a low pressure liquid reservoir, and a lower pressure liquid pump; the side refrigerant outlet opening of the outdoor heat exchanger is mutually connected with the inlet opening of the outdoor throttling mechanism, the outlet opening of the outdoor throttling mechanism is mutually connected with the inlet opening of the low pressure liquid reservoir, the outlet opening of the low pressure liquid reservoir is mutually connected with the inlet opening of the lower pressure liquid pump, and the outlet opening of the lower pressure liquid pump is mutually connected with the inlet opening of the indoor throttling mechanism. The low pressure liquid reservoir ensures the lower pressure liquid pump to stably run, and the lower pressure liquid pump supplements the power for refrigerant; the problems that the refrigeration performance of the system is descended and the oil return performance of the system is degraded, etc. caused by high drop and a long connecting pipe can be overcome, and the effect is good.
Description
Technical field
The utility model relates to a kind of cooling cycle system that is used for communications equipment room, especially a kind of cooling cycle system that can overcome problems such as refrigeration performance decline that high drop and long connecting leg installation form bring to system, oil return mis-behave.
Background technology
Communications equipment room is furnished with a large amount of communication equipments such as switch, the electronic devices and components in the course of work on these equipment can be in machine room distribute heat, in order to guarantee the operate as normal of equipment, communications equipment room must dispose the air-conditioning equipment that is used to freeze.
Fig. 1 is a communications equipment room cooling cycle system structural representation conventional in the prior art.This cooling cycle system comprises indoor set 9 and off-premises station 10.Off-premises station 10 is made of an outdoor heat exchanger 1, is used for the refrigerant vapour of condensation liquefaction HTHP, and it is connected with indoor set 9 with liquid refrigerant tube connector 4 by gaseous refrigerant tube connector 8 respectively.Indoor set 9 comprises: a throttle mechanism 5, be used for the throttling step-down and the Flow-rate adjustment of cold-producing medium, and its inlet links to each other with liquid refrigerant tube connector 4; An indoor heat exchanger 6 is used for the gasification heat absorption of low-temp low-pressure liquid refrigerant, and its inlet links to each other with the outlet of throttle mechanism 5; One compressor 7 is used for shortening the low-temperature low-pressure refrigerant vapour pressure into the high-temperature high-pressure refrigerant steam, and its air intake duct links to each other with the outlet of indoor heat exchanger 6 refrigerant sides, and blast pipe links to each other with outdoor heat exchanger 1 by gaseous refrigerant tube connector 8.During work, through low temperature, low pressure refrigerant after the throttle mechanism 5 throttling step-downs indoor heat exchanger 6 of flowing through, in the absorption chamber behind the heat boil-off gas change into the low area overheat steam; The compressed machine 7 of low area overheat steam flow is compressed into the high-temperature high-pressure refrigerant steam; High-temperature high-pressure refrigerant steam flow external heat release, condensate liquid when outdoor heat exchanger 1 change into high-pressure liquid; The high pressure liquid refrigerant throttle mechanism 5 of flowing through, the throttling step-down becomes low temperature, low-pressure gas-liquid two phase refrigerant, enters indoor heat exchanger 6 afterwards, finishes a complete kind of refrigeration cycle.
Communication equipment packing density height in the communications equipment room, caloric value is big, and therefore to compare communications equipment room higher to the requirement of cooling cycle system with commercial or home air-conditioning.Simultaneously; this body structure of communications equipment room building of living in has nothing in common with each other; different service conditions also has different demands to the installation of air-conditioning unit; the indoor set of cooling cycle system and the off-premises station setting height(from bottom) between the two occurring through regular meeting in the practice differs greatly; the very long situation of connecting leg length that is used for continuous indoor set and off-premises station; in this case as adopting cooling cycle system shown in Figure 1; not only the circulation ability of system's inner refrigerant descends greatly; system's degree of supercooling; condensing pressure and evaporating pressure also directly are affected; cause system's refrigeration performance to descend greatly, refrigeration oil oil return difficulty also might take place in simultaneity factor.For addressing the above problem, the cooling cycle system that has has been installed oil eliminator at the exhaust outlet of compressor 7; The cooling cycle system that has is on the gaseous refrigerant tube connector between outdoor heat exchanger 1 and the compressor 7, and perhaps on the gaseous refrigerant tube connector between indoor heat exchanger 6 and the compressor 7, it is curved to promote the refrigeration oil oil return that oil return is set; The cooling cycle system that also has adopts regular oil return, carries out the separation regeneration running of refrigeration oil after operation a period of time, allows a large amount of refrigerant liquids wash away and is attached to the refrigeration oil on the tube wall and takes back compressor.Adopt oil eliminator to have oily separation rate problem, refrigeration oil can not be separated fully, behind the long-play, the refrigeration oil in the pipeline can get more and more; The employing oil return is curved, can promote the refrigeration oil oil return to a certain extent, but can't remedy the decline of system's refrigeration performance that difference in height, long connecting leg bring; The time length of the time interval of oil return regularly and each oil return running all needs Due Diligence, and the parts of refrigeration system are different, directly influences determining of these two parameters.The solution of problems such as the refrigeration performance decline that brings to cooling cycle system for the high drop of communications equipment room and long connecting leg installation form, oil return mis-behave, the effect of above-mentioned various measures of the prior art is not ideal.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of cooling cycle system that can overcome the communications equipment room of problems such as refrigeration performance decline that high drop and long connecting leg installation form bring to system, oil return mis-behave.
For solving the problems of the technologies described above, the utility model provides a kind of cooling cycle system of communications equipment room, comprises off-premises station and indoor set; Off-premises station comprises outdoor heat exchanger, and indoor set comprises indoor throttle mechanism, indoor heat exchanger and compressor; The outlet of indoor throttle mechanism links to each other with the refrigerant side of indoor heat exchanger inlet, and the air intake duct of compressor links to each other with the outlet of the refrigerant side of indoor heat exchanger, and the blast pipe of compressor links to each other with the refrigerant side of outdoor heat exchanger inlet; Off-premises station also comprises outdoor throttle mechanism, low-pressure oil storage and low pressure liquid pump; The refrigerant side outlet of outdoor heat exchanger links to each other with the inlet of outdoor throttle mechanism, the outlet of outdoor throttle mechanism links to each other with the inlet of low-pressure oil storage, the outlet of low-pressure oil storage links to each other with the inlet of low pressure liquid pump, and the outlet of low pressure liquid pump links to each other with the inlet of indoor throttle mechanism.
During work, compressor shortens the low-temperature low-pressure refrigerant vapour pressure into the high-temperature high-pressure refrigerant steam, the high-temperature high-pressure refrigerant steam is condensed into liquid refrigerant after the outdoor heat exchanger heat radiation, liquid refrigerant is stored in the low-pressure oil storage after outdoor throttle mechanism throttling for the first time step-down, the low pressure liquid pump pumps the liquid refrigerant in the low-pressure oil storage, after the indoor throttle mechanism of the cold-producing medium process throttling for the second time step-down, by the heat in the indoor heat exchanger absorption machine room, temperature in the machine room is reduced, cold-producing medium boil-off gas in indoor heat exchanger changes into refrigerant vapour in this process simultaneously, refrigerant vapour enters compressor again, be compressed into high temperature, high-pressure refrigerant vapor so moves in circles.
As improvement of the present utility model, the inlet of low-pressure oil storage is higher than the outlet of low-pressure oil storage on vertical height.The inlet that preferred mode is a low-pressure oil storage is positioned at the top of low-pressure oil storage, the outlet of low-pressure oil storage is positioned at the bottom of low-pressure oil storage.Can guarantee as far as possible that like this low-pressure oil storage outlet cold-producing medium is entirely liquid state.
For satisfying the cavitation requirement of low pressure liquid pump, can make low-pressure oil storage on vertical height, be higher than the inlet of low pressure liquid pump.
The working pressure range of low-pressure oil storage and low pressure liquid pump is 10bar-19bar.
Further improve as the utility model, be equiped with oil eliminator on the blast pipe of compressor, this oil eliminator is provided with the oil return pipe that isolated refrigeration oil is drawn back compressor suction duct.Oil eliminator can better promote the refrigeration oil oil return with the low pressure liquid pump.
Further improve as the utility model, link to each other by the gaseous refrigerant tube connector between the blast pipe of compressor and the refrigerant side of the outdoor heat exchanger inlet; It is curved that this gaseous refrigerant tube connector is provided with oil return.Oil return is curved can better to promote the refrigeration oil oil return with oil eliminator, low pressure liquid pump.Oil return is curved can be provided with one every the difference in height of 6m.
Outdoor heat exchanger can adopt air-cooled heat exchanger, also can adopt water-cooled heat exchanger; Indoor heat exchanger can adopt air-cooled heat exchanger, also can adopt water-cooled heat exchanger.
Indoor throttle mechanism can adopt heating power expansion valve, electric expansion valve or capillary; Outdoor throttle mechanism also can adopt heating power expansion valve, electric expansion valve or capillary.
The logic control element that is electrically connected with outdoor heat exchanger, low pressure liquid pump, indoor heat exchanger and compressor respectively can also be set.Outdoor heat exchanger, low pressure liquid pump, indoor heat exchanger and compressor can controlled operations under the control of control module like this, guarantee the operating efficiency and the stability of system.When implementing the utility model, if indoor throttle mechanism or outdoor throttle mechanism adopt electric expansion valve, electric expansion valve can be electrically connected with logic control element.
In the cooling cycle system running of the utility model communications equipment room, the circulation that the low pressure liquid pump can be cold-producing medium replenishes power, and low-pressure oil storage can ensure the stable operation of low pressure liquid pump, and outdoor throttle mechanism guarantees the trouble free service of low-pressure oil storage.By low-pressure oil storage and low pressure liquid pump are set, can offset the cold-producing medium circulation resistance that high drop and long connecting leg installation form cause, and provide new power for the circulation of cold-producing medium, improved the circulation ability of cold-producing medium, overcome problems such as refrigeration performance decline that high drop and long connecting leg installation form bring to system, oil return mis-behave, respond well.
Description of drawings
Below by the specific embodiment also in conjunction with the accompanying drawings, the utility model is described in further detail:
Fig. 1 is the cooling cycle system structural representation of the communications equipment room of routine in the prior art;
Fig. 2 is the structural representation of the utility model embodiment 1;
Fig. 3 is the 1gp-h curve synoptic diagram in cooling cycle system when operation of communications equipment room shown in Figure 1
Fig. 4 is the structural representation of the utility model embodiment 2;
Fig. 5 is the structural representation of the utility model embodiment 3;
Fig. 6 is the structural representation of the utility model embodiment 4.
The specific embodiment
Embodiment 1
Fig. 2 is the structural representation of a kind of embodiment of the utility model.
As shown in Figure 2, the cooling cycle system of this communications equipment room comprises logic control element (not shown among Fig. 2), off-premises station 10 and indoor set 9; Off-premises station 10 comprises outdoor heat exchanger 1, and indoor set 9 comprises first heating power expansion valve 5 (indoor throttle mechanism), indoor heat exchanger 6 and compressor 7; The outlet of first heating power expansion valve 5 links to each other with the refrigerant side inlet of indoor heat exchanger 6, and the air intake duct of compressor 7 links to each other with the refrigerant side outlet of indoor heat exchanger 6, and the blast pipe of compressor 7 links to each other with the refrigerant side inlet of outdoor heat exchanger 1; Off-premises station 10 also comprises second heating power expansion valve 11 (outdoor throttle mechanism), low-pressure oil storage 2 and low pressure liquid pump 3; The refrigerant side outlet of outdoor heat exchanger 1 links to each other with the inlet of second heating power expansion valve 11, the outlet of second heating power expansion valve 11 links to each other with the inlet of low-pressure oil storage 2, the outlet of low-pressure oil storage 2 links to each other with the inlet of low pressure liquid pump 3, and the outlet of low pressure liquid pump 3 links to each other with the inlet of first heating power expansion valve 5.The inlet of low-pressure oil storage 2 is positioned at the top of low-pressure oil storage 2, the outlet of low-pressure oil storage 2 is positioned at the bottom of low-pressure oil storage 2.Outdoor heat exchanger 1 and indoor heat exchanger 6 all adopt air-cooled heat exchanger.The operating pressure of low-pressure oil storage 2 and low pressure liquid pump 3 is 10bar.Logic control element is electrically connected with outdoor heat exchanger 1, indoor heat exchanger 6, compressor 7 and low pressure liquid pump 3 respectively, the controlled operation under the control of logic control element of outdoor heat exchanger 1, indoor heat exchanger 6, compressor 7 and low pressure liquid pump 3, the operating efficiency and the stability of assurance system.
During work, compressor 7 shortens the low-temperature low-pressure refrigerant vapour pressure into the high-temperature high-pressure refrigerant steam, the high-temperature high-pressure refrigerant steam is condensed into sub-cooled liquid refrigerant after outdoor heat exchanger 1 heat radiation, liquid refrigerant is stored into after the 11 throttling step-downs of second heating power expansion valve in the low-pressure oil storage 2 to guarantee the normal operation of low pressure liquid pump 3, and low pressure liquid pump 3 will pump from the liquid refrigerant that low-pressure oil storage 2 flows out; Cold-producing medium through the 5 throttling step-downs of first heating power expansion valve after, absorb heat in the machine rooms by indoor heat exchanger 6, the temperature in the machine room is reduced, cold-producing medium boil-off gas in indoor heat exchanger 6 changes into the superheated refrigerant steam in this process simultaneously; Refrigerant vapour enters compressor 7 again, so moves in circles.
The 1gp-h figure that low pressure liquid pump that Fig. 3 provides for the utility model and compressor drive cooling cycle system jointly.Among Fig. 3, the A point coordinates is the 1gp of the low-temperature low-pressure refrigerant steam in indoor heat exchanger 6 exits, the h value, the B point coordinates is the 1gp of the high-temperature high-pressure refrigerant steam in compressor 7 exits, the h value, the C point coordinates is the 1gp of the supercooled liquid phase cold-producing medium in outdoor heat exchanger 1 exit, the h value, the D point coordinates is the 1gp of the gas-liquid two-phase cold-producing medium after the 11 exit throttling step-downs of second heating power expansion valve, the h value, the E point coordinates is the 1gp of the saturated liquid phase refrigerant in low-pressure oil storage 2 exits, the h value, the F point coordinates is the 1gp of low pressure liquid pump 3 porch supercooled liquid phase cold-producing mediums, the h value, the G point coordinates is the 1gp of the high pressure supercooled liquid phase cold-producing medium in low pressure liquid pump 3 exits, h value, H point coordinates are the 1gp of the low-temp low-pressure gas-liquid two-phase cold-producing medium after the 5 exit throttling step-downs of first heating power expansion valve, the h value; A-B is the pressurization that compressor 7 shortens the low-temperature low-pressure refrigerant vapour pressure into the high-temperature high-pressure refrigerant steam; B-C is the exothermic process of cold-producing medium in outdoor heat exchanger 1 inner condensat liquidization, C-D is the one-level throttling decrease temperature and pressure process of cold-producing medium in outdoor throttle mechanism 11, D-E is gas-liquid separation and the step-down process of cold-producing medium in low-pressure oil storage 2, and E-F is the pressure elevation process of cold-producing medium in low-pressure oil storage 2 drain pipes; F-G is the pressurization of cold-producing medium in low pressure liquid pump 3, and G-H is the throttling step-down process of cold-producing medium in first heating power expansion valve 5, and H-A is the endothermic gasification process of cold-producing medium in indoor heat exchanger 6.
In running, the circulation that low pressure liquid pump 3 can be cold-producing medium replenishes power, and low-pressure oil storage 2 can ensure the stable operation of low pressure liquid pump 3, and second heating power expansion valve 11 guarantees the trouble free service of low-pressure oil storage.By second heating power expansion valve 11, low pressure liquid pump 3 and low-pressure oil storage 2 are set, can offset the cold-producing medium circulation resistance that high drop and long connecting leg installation form cause, and provide new power for the circulation of cold-producing medium, improved the circulation ability of cold-producing medium, overcome problems such as refrigeration performance decline that high drop and long connecting leg installation form bring to system, oil return mis-behave, respond well.
Fig. 4 is the structural representation of second kind of embodiment of the utility model.
This system is with the different of embodiment 1: outdoor heat exchanger 1 adopts water-cooled, and the operating pressure of low-pressure oil storage 2 and low pressure liquid pump 3 is 19bar.The high temperature and high pressure gaseous refrigerant condensation liquefaction that water-cooled outdoor heat exchanger 1 utilizes chilled water that compressor 7 is discharged.
Fig. 5 is the structural representation of the third embodiment of the utility model.
This system is with the different of embodiment 1: indoor heat exchanger 6 adopts water-cooled, and the operating pressure of low-pressure oil storage 2 and low pressure liquid pump 3 is 15bar.Water-cooled indoor heat exchanger 6 utilizes the water source with low-temperature low-pressure refrigerant liquid heating and gasifying, provides cold to the water source simultaneously.
Embodiment 4
Fig. 6 is the structural representation of the 4th kind of embodiment of the utility model.
This system is with the different of embodiment 1: outdoor heat exchanger 1 and indoor heat exchanger 6 all adopt water-cooled.The high temperature and high pressure gaseous refrigerant condensation liquefaction heat release that water-cooled outdoor heat exchanger 1 utilizes chilled water that compressor 7 is discharged; Water-cooled indoor heat exchanger 6 utilizes the water source with low-temp low-pressure liquid refrigerant heating and gasifying, provides cold to the water source simultaneously.
This system is with the different of embodiment 1: be equiped with oil eliminator on the blast pipe of compressor 7, this oil eliminator is provided with the oil return pipe that isolated refrigeration oil is drawn back compressor 7 air intake ducts.This oil eliminator is set promotes the refrigeration oil oil return better.
This system is with the different of embodiment 5: link to each other by the gaseous refrigerant tube connector between the refrigerant side inlet of the blast pipe of compressor 7 and outdoor heat exchanger 1; It is curved that this gaseous refrigerant tube connector is provided with oil return, and pipeline every rising on vertical height is provided with an oil return for 6 meters and bends.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. the cooling cycle system of a communications equipment room comprises off-premises station (10) and indoor set (9); Described off-premises station (10) comprises outdoor heat exchanger (1), and described indoor set (9) comprises indoor throttle mechanism (5), indoor heat exchanger (6) and compressor (7); The outlet of described indoor throttle mechanism (5) links to each other with the refrigerant side inlet of described indoor heat exchanger (6), the air intake duct of described compressor (7) links to each other with the refrigerant side outlet of described indoor heat exchanger (6), and the blast pipe of described compressor (7) links to each other with the refrigerant side inlet of described outdoor heat exchanger (1); It is characterized in that: described off-premises station (10) also comprises outdoor throttle mechanism (11), low-pressure oil storage (2) and low pressure liquid pump (3); The refrigerant side outlet of described outdoor heat exchanger (1) links to each other with the inlet of described outdoor throttle mechanism (11), the outlet of described outdoor throttle mechanism (11) links to each other with the inlet of described low-pressure oil storage (2), the outlet of described low-pressure oil storage (2) links to each other with the inlet of described low pressure liquid pump (3), and the outlet of described low pressure liquid pump (3) links to each other with the inlet of described indoor throttle mechanism (5).
2. the cooling cycle system of communications equipment room according to claim 1 is characterized in that: the inlet of described low-pressure oil storage (2) is higher than the outlet of described low-pressure oil storage (2) on vertical height.
3. the cooling cycle system of communications equipment room according to claim 2 is characterized in that: described low-pressure oil storage (2) is higher than the inlet of described low pressure liquid pump (3) on vertical height.
4. the cooling cycle system of communications equipment room according to claim 3, it is characterized in that: the inlet of described low-pressure oil storage (2) is positioned at the top of described low-pressure oil storage (2), and the outlet of described low-pressure oil storage (2) is positioned at the bottom of described low-pressure oil storage (2).
5. according to the cooling cycle system of claim 1,2,3 or 4 described communications equipment rooms, it is characterized in that: the working pressure range of described low-pressure oil storage (2) and low pressure liquid pump (3) is 10bar-19bar.
6. the cooling cycle system of communications equipment room according to claim 5, it is characterized in that: be equiped with oil eliminator on the blast pipe of described compressor (7), this oil eliminator is provided with the oil return pipe that isolated refrigeration oil is drawn back described compressor (7) air intake duct.
7. the cooling cycle system of communications equipment room according to claim 6 is characterized in that: link to each other by the gaseous refrigerant tube connector between the refrigerant side inlet of the blast pipe of described compressor (7) and described outdoor heat exchanger (1); It is curved that this gaseous refrigerant tube connector is provided with oil return.
8. the cooling cycle system of communications equipment room according to claim 7, it is characterized in that: described outdoor heat exchanger (1) is air-cooled heat exchanger or water-cooled heat exchanger; Described indoor heat exchanger (6) is air-cooled heat exchanger or water-cooled heat exchanger.
9. the cooling cycle system of communications equipment room according to claim 8, it is characterized in that: described indoor throttle mechanism (5) is heating power expansion valve, electric expansion valve or capillary; Described outdoor throttle mechanism (11) is heating power expansion valve, electric expansion valve or capillary.
10. the cooling cycle system of communications equipment room according to claim 9 is characterized in that: also comprise the logic control element that is electrically connected with described outdoor heat exchanger (1), low pressure liquid pump (3), indoor heat exchanger (6) and compressor (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201210905U CN201072191Y (en) | 2007-06-27 | 2007-06-27 | Cooling cycle system of communication machine room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201210905U CN201072191Y (en) | 2007-06-27 | 2007-06-27 | Cooling cycle system of communication machine room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072191Y true CN201072191Y (en) | 2008-06-11 |
Family
ID=39550749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201210905U Expired - Lifetime CN201072191Y (en) | 2007-06-27 | 2007-06-27 | Cooling cycle system of communication machine room |
Country Status (1)
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| CN (1) | CN201072191Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148645A (en) * | 2013-01-27 | 2013-06-12 | 南京瑞柯徕姆环保科技有限公司 | Cold circulation refrigeration system |
| CN103277880A (en) * | 2013-05-13 | 2013-09-04 | 艾默生网络能源有限公司 | Refrigeration control method, device and system of machine room |
| CN104142031A (en) * | 2013-05-08 | 2014-11-12 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
-
2007
- 2007-06-27 CN CNU2007201210905U patent/CN201072191Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148645A (en) * | 2013-01-27 | 2013-06-12 | 南京瑞柯徕姆环保科技有限公司 | Cold circulation refrigeration system |
| CN103148645B (en) * | 2013-01-27 | 2015-08-05 | 南京瑞柯徕姆环保科技有限公司 | A kind of cold power circulating refrigerating device |
| CN104142031A (en) * | 2013-05-08 | 2014-11-12 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
| CN104142031B (en) * | 2013-05-08 | 2017-02-08 | 艾默生网络能源有限公司 | Air conditioning system and control method thereof |
| CN103277880A (en) * | 2013-05-13 | 2013-09-04 | 艾默生网络能源有限公司 | Refrigeration control method, device and system of machine room |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080611 |