CN112888262B - Cooling system - Google Patents
Cooling system Download PDFInfo
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- CN112888262B CN112888262B CN202110129454.9A CN202110129454A CN112888262B CN 112888262 B CN112888262 B CN 112888262B CN 202110129454 A CN202110129454 A CN 202110129454A CN 112888262 B CN112888262 B CN 112888262B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20309—Evaporators
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20318—Condensers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses a cooling system relates to cold and hot circulation technical field, cooling system includes: an indoor module, the indoor module comprising: a primary evaporator and a secondary evaporator; an outdoor module, the outdoor module comprising: a primary condenser and a secondary condenser; the outlet of the first-stage evaporator is connected with the inlet of the first-stage condenser through a pipeline, the outlet of the first-stage condenser is connected with the inlet of the first-stage evaporator through a liquid pump, and the first-stage evaporator, the first-stage condenser and the liquid pump form a first-stage refrigeration circulation path; wherein, the inlet of the first-stage evaporator is connected in series with a first-stage throttle valve; the outlet of the secondary evaporator is connected with the inlet of the secondary condenser through an oil-free compressor, the outlet of the secondary condenser is connected with the inlet of the secondary evaporator through a pipeline, and the secondary evaporator, the secondary condenser and the oil-free compressor form a secondary refrigeration circulation path; wherein, the inlet of the secondary evaporator is connected with a secondary throttle valve in series. The cooling system has the advantages of small power consumption and high energy-saving efficiency.
Description
Technical Field
The disclosure relates to the technical field of cold and hot circulation, in particular to a cooling system.
Background
With the development of IDC (Internet Data Center ) industry, the energy efficiency limit of the data center industry is more and more strict, and in the large background of new construction, the energy saving of the data center is an unavoidable problem.
The current cooling system is composed of an outdoor unit, an indoor unit, a throttle valve, a fluorine pump and an oil-free compressor which are connected in series, wherein a refrigerant is evaporated and absorbed in an indoor evaporator, the oil-free compressor is used for pressurizing the refrigerant to an outdoor condenser for cooling, after the gaseous refrigerant is cooled to be in a liquid state, the fluorine pump is used for providing power, the refrigerant is pumped into the throttle device, the throttle device is used for adjusting the opening degree according to the required cold load quantity at the tail end, the refrigerant flows into the evaporator and is subjected to phase change and absorbs heat, and heat of IT (Internet Technology, information technology) equipment is taken away, so that the refrigeration cycle is completed.
In the scheme, the oil-free compressor is connected with the fluorine pump in series, the oil-free compressor needs to be provided with a hundred percent of refrigerating capacity, the power consumption is large, and the energy-saving efficiency is poor.
Disclosure of Invention
The present disclosure provides a cooling system for reducing power consumption and improving energy saving efficiency.
According to an aspect of the present disclosure, there is provided a cooling system including:
an indoor module, the indoor module comprising: a primary evaporator and a secondary evaporator;
an outdoor module, the outdoor module comprising: a primary condenser and a secondary condenser;
the outlet of the primary evaporator is connected with the inlet of the primary condenser through a pipeline, the outlet of the primary condenser is connected with the inlet of the primary evaporator through a liquid pump, and the primary evaporator, the primary condenser and the liquid pump form a primary refrigeration circulation path; the inlet of the primary evaporator is connected with a primary throttle valve in series;
the outlet of the secondary evaporator is connected with the inlet of the secondary condenser through an oil-free compressor, the outlet of the secondary condenser is connected with the inlet of the secondary evaporator through a pipeline, and the secondary evaporator, the secondary condenser and the oil-free compressor form a secondary refrigeration circulation path; the inlet of the secondary evaporator is connected with a secondary throttle valve in series.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.
Drawings
The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
FIG. 1 is a schematic diagram of a cooling system provided by the present disclosure;
FIG. 2 is a schematic structural view of another cooling system provided by the present disclosure;
fig. 3 is an exemplary diagram of a primary evaporator and a secondary evaporator in an indoor module provided by the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
IT can be understood that the current cooling system is composed of an outdoor unit, an indoor unit, a throttle valve, a fluorine pump and an oil-free compressor which are connected in series, the refrigerant evaporates and absorbs heat in an indoor evaporator, the oil-free compressor pressurizes the refrigerant to an outdoor condenser for cooling, the gaseous refrigerant is cooled to be liquid, then the fluorine pump provides power for pumping the refrigerant into the throttle device, the throttle device adjusts the opening degree according to the required cold load quantity at the tail end, the refrigerant flows into the evaporator, the phase change absorbs heat, and the heat of IT equipment is taken away, so that the refrigeration cycle is completed.
In the scheme, the oil-free compressor is connected with the fluorine pump in series, the oil-free compressor needs to be provided with a hundred percent of refrigerating capacity, the power consumption is large, and the energy-saving efficiency is poor.
In order to solve the technical problem, the disclosure provides a cooling system, which comprises a two-stage refrigeration circulation path, wherein an oil-free compressor and a fluorine pump are respectively positioned in the two-stage refrigeration circulation path and the one-stage refrigeration circulation path, the oil-free compressor is connected with the fluorine pump in parallel, and the oil-free compressor is started only when the two-stage refrigeration circulation path is required to work and does not need to be configured with a hundred percent of refrigeration capacity, so that the power consumption is reduced, and the energy saving efficiency is improved.
The cooling system provided by the present disclosure is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a cooling system provided by the present disclosure, including:
indoor module 2, indoor module 2 includes: a primary evaporator 21 and a secondary evaporator 22;
the outdoor module 1, the outdoor module 1 includes: a primary condenser 11 and a secondary condenser 12;
the outlet of the primary evaporator 21 is connected with the inlet of the primary condenser 11 through a pipeline, the outlet of the primary condenser 11 is connected with the inlet of the primary evaporator 21 through the liquid pump 3, and the primary evaporator 21, the primary condenser 11 and the liquid pump 3 form a primary refrigeration circulation path; wherein, the inlet of the first-stage evaporator 21 is connected in series with a first-stage throttle valve 51;
the outlet of the secondary evaporator 22 is connected with the inlet of the secondary condenser 12 through the oil-free compressor 4, the outlet of the secondary condenser 12 is connected with the inlet of the secondary evaporator 22 through a pipeline, and the secondary evaporator 22, the secondary condenser 12 and the oil-free compressor 4 form a secondary refrigeration circulation path; wherein the inlet of the secondary evaporator 22 is connected in series with a secondary throttle valve 52.
The outdoor module 1 may be a condenser, which includes a primary condenser 11 and a secondary condenser 12, the primary condenser 11 and the secondary condenser 12 may be an air-cooled condenser and an evaporation condenser, and the primary condenser 11 and the secondary condenser 12 may be physically condensing coils; the indoor module 2 can be a room-level air conditioner, a back plate and the like, the indoor module 2 comprises a primary evaporator 21 and a secondary evaporator 22, and the primary evaporator 21 and the secondary evaporator 22 can be an evaporation coil physically; the oil-free compressor 4 is an air pump, and can be a magnetic suspension compressor or an air suspension compressor.
It should be noted that, in the embodiment of the present disclosure, the number of the outdoor modules 1 may be single or plural, and the number of the indoor modules 2 may be single or plural, which is not limited in the present disclosure, and in fig. 1, the number of the outdoor modules 1 is single and the number of the indoor modules 2 is plural.
It will be understood that when the number of the outdoor modules 1 and the indoor modules 2 is single, the first-stage evaporator 21 of the single indoor module 2, the first-stage condenser 11 of the single outdoor module 1, and the liquid pump 3 form one first-stage refrigeration cycle path, and the second-stage evaporator 22 of the single indoor module 2, the second-stage condenser 12 of the single outdoor module 1, and the oil-free compressor 4 form one second-stage refrigeration cycle path.
In the embodiment of the disclosure, a primary refrigeration cycle path may be set to operate in a natural cooling mode throughout the year, referring to fig. 1, when the primary refrigeration cycle path is communicated, gas generated by the primary evaporator 21 of the indoor module 2 returns to the primary evaporator 21 of the indoor module 2 via the primary condenser 11 and the liquid pump 3 to form the primary refrigeration cycle path. The second-stage refrigeration cycle is operated when the cooling capacity of the first-stage refrigeration cycle is insufficient, and when the second-stage refrigeration cycle is connected, the gas generated in the second-stage evaporator 22 of the indoor module 2 returns to the second-stage evaporator 22 via the oil-free compressor 4 and the second-stage condenser 12 of the outdoor module 1 to form the second-stage refrigeration cycle.
It should be noted that, in the embodiment of the present disclosure, the primary refrigeration cycle path and the secondary refrigeration cycle path are separated, and the primary evaporator 21 and the secondary evaporator 22 are taken as evaporation coils, and two evaporation coils in one indoor module 2 are not connected physically, but are merely placed together, for example, stacked together, so that, during air supply, indoor air can pass through the two evaporation coils in sequence, thereby cooling indoor air.
According to the technical scheme, the cooling system is divided into the two-stage refrigeration circulation paths, the liquid pump 3 and the oil-free compressor 4 are respectively located in the first-stage refrigeration circulation path and the second-stage refrigeration circulation path, the oil-free compressor 4 and the liquid pump 3 are connected in parallel, the first-stage refrigeration circulation path runs in a natural cooling mode all the year round, the second-stage refrigeration circulation path runs when the cooling capacity of the first-stage refrigeration circulation path is insufficient, the liquid pump 3 consumes little electric energy, the oil-free compressor 4 consumes much electric energy, and the second-stage refrigeration circulation path only carries out refrigeration when needed, so that the running time of the oil-free compressor 4 is shortened, and the indoor module 2 comprises two evaporators, the outdoor module 1 comprises two condensers, the heat exchange area is increased, and the oil-free compressor 4 only needs 50% of refrigerating capacity before configuration, so that the electric consumption is reduced, and the energy saving efficiency is improved.
In an exemplary embodiment, when the number of the outdoor modules 1 is a single and the number of the indoor modules 2 is a plurality, the structure of the cooling system may be as shown in fig. 1, in which the outlets of the first stage evaporators 21 of the plurality of indoor modules 2 are connected to the inlet of the first stage condenser 11 of the outdoor module 1 through pipes; the outlet of the first-stage condenser 11 in the outdoor module 1 is respectively connected with the inlets of the first-stage evaporators 21 of the plurality of indoor modules 2 through the liquid pump 3, wherein the inlet of the first-stage evaporator 21 of each indoor module 2 is connected with a first-stage throttle valve 51 in series;
the outlets of the secondary evaporators 22 of the plurality of indoor modules 2 are connected with the inlet of the secondary condenser 12 of the outdoor module 1 through the oil-free compressor 4; the outlet of the secondary condenser 12 in the outdoor module 1 is connected with the inlets of the secondary evaporators 12 of the plurality of indoor modules 1 respectively through pipelines, wherein the inlet of the secondary evaporator 22 of each indoor module 2 is connected with a secondary throttle valve 52 in series.
It will be understood that when the number of the outdoor modules 1 in the cooling system is single, the number of the indoor modules 2 is plural, and the cooling system is of the structure shown in fig. 1, the first-stage condenser 11 of the single outdoor module 1 may form one first-stage refrigeration cycle path together with the first-stage evaporator 21 of each indoor module 2 and the liquid pump 3, respectively, thereby forming plural first-stage refrigeration cycle paths, and the second-stage condenser 12 of the single outdoor module 1 may form one second-stage refrigeration cycle path together with the second-stage evaporator 22 of each indoor module 2 and the oil-free compressor 4, respectively, thereby forming plural second-stage refrigeration cycle paths.
When the first-stage refrigeration cycle paths are connected, the gas generated in the first-stage evaporators 21 of the plurality of indoor modules 2 returns to the first-stage evaporators 21 of the plurality of indoor modules 2 via the first-stage condenser 11 of the outdoor module 1 and the liquid pump 3.
When the two-stage refrigeration cycle paths are connected, the gas generated in the two-stage evaporators 22 of the plurality of indoor modules 2 is returned to the two-stage evaporators 22 of the plurality of indoor modules 2 via the oil-free compressor 4 and the two-stage condenser 12 of the outdoor module 1.
By arranging a plurality of indoor modules 2 in the cooling system, the cooling capacity provided by the cooling system can be increased, a primary refrigeration circulation path is formed by the primary evaporator 21 in each indoor module 2, the primary condenser 11 in the outdoor module 1 and the liquid pump 3, and a secondary refrigeration circulation path is formed by the secondary evaporator 22 in each indoor module 2, the oil-free compressor and the secondary condenser 12 in the outdoor module 1, so that the cooling capacity can be increased, the power consumption can be reduced, and the energy saving efficiency can be improved. And each primary refrigeration cycle system shares a liquid pump 3, and each secondary refrigeration cycle system shares an oil-free compressor 4, so that the cost is saved.
In an exemplary embodiment, a liquid pump (not shown in fig. 1) may be further included in the two-stage refrigeration cycle path, wherein the liquid pump is connected between the inlet of the two-stage evaporator 22 and the outlet of the two-stage condenser 12 through a pipe, and each of the two-stage refrigeration cycle paths shares one liquid pump. By providing the liquid pump in the two-stage refrigeration cycle, the amount of cooling that can be provided by the two-stage refrigeration cycle can be further increased.
In the exemplary embodiment, when the number of the indoor modules 2 is plural, the number of the outdoor modules 1 and the number of the outdoor modules 2 may be set to be identical, that is, the number of the indoor modules 2 and the number of the outdoor modules 1 are identical and plural, and the structure of the cooling system may be as shown in fig. 2.
Referring to fig. 2, the outdoor modules 1 are in one-to-one correspondence with the indoor modules 2, and the number of the oil-free compressors 4 is identical to the number of the indoor modules 2 and in one-to-one correspondence;
the outlet of the first-stage evaporator 21 of the indoor module 2 is connected with the inlet of the first-stage condenser 11 of the corresponding outdoor module 1 through a pipeline; the outlets of the first-stage condensers 11 of the plurality of outdoor modules 1 are connected with the inlets of the first-stage evaporators 21 of the plurality of indoor modules 2 through the liquid pump 3;
the outlet of the secondary evaporator 22 of the indoor module 2 is connected with the inlet of the secondary condenser 12 of the corresponding outdoor module 1 through the corresponding oil-free compressor 4; the outlet of the secondary condenser 12 of the outdoor module 1 is connected to the inlet of the secondary evaporator 22 of the corresponding indoor module 2 through a pipe.
It will be understood that when the number of the outdoor modules 1 and 2 is the same, and the cooling system is structured as shown in fig. 2, the first-stage evaporator 21 of each indoor module 2 and the first-stage condenser 11 of the corresponding outdoor module 1, and the same liquid pump 3 together form one first-stage refrigeration cycle path, thereby forming a plurality of first-stage refrigeration cycle paths, and the second-stage evaporator 22 of each indoor module 2 and the second-stage condenser of the corresponding outdoor module 1, and the corresponding oil-free compressor 4 together form one second-stage refrigeration cycle path, thereby forming a plurality of second-stage refrigeration cycle paths.
When the respective one-stage refrigeration cycle paths are connected, the gas generated in the one-stage evaporator 21 of each indoor module 2 returns to the one-stage evaporator 21 of the indoor module 2 via the one-stage condenser 11 and the liquid pump 3 of the corresponding outdoor module 1.
When the respective two-stage refrigeration cycle paths are communicated, the gas generated by the two-stage evaporator 22 of each indoor module 2 is returned to the two-stage evaporator 22 of the indoor module 2 via the corresponding oil-free compressor 4 and the two-stage condenser 12 of the corresponding outdoor module 1.
By arranging a plurality of indoor modules 2 and a plurality of outdoor modules 1 in the cooling system, the cooling capacity provided by the cooling system can be increased, a primary refrigeration circulation path is formed by the primary evaporator 21 in each indoor module 2 and the primary condenser 11 and the liquid pump 3 in the corresponding outdoor module 1, and a secondary refrigeration circulation path is formed by the secondary evaporator 22 in each indoor module 2 and the corresponding oil-free compressor and the secondary condenser 12 in the corresponding outdoor module 1, so that the cooling capacity can be increased, the power consumption can be reduced, and the energy saving efficiency can be improved.
In an exemplary embodiment, a liquid pump (not shown in fig. 2) may be further included in each of the two-stage refrigeration cycle paths, wherein the liquid pump is connected between the inlet of the two-stage evaporator 22 of the indoor module 2 and the outlet of the two-stage condenser 12 of the corresponding outdoor module 1 through a pipe for each of the two-stage refrigeration cycle paths. By providing the liquid pump in the two-stage refrigeration cycle, the amount of cooling that can be provided by the two-stage refrigeration cycle can be further increased.
It will be appreciated that the indoor module 2 is located indoors and that the circulation of indoor wind is such that indoor air enters the indoor module 2 and then passes through the indoor module 2 back into the room. In the embodiment of the disclosure, the primary refrigeration cycle passage is set to operate in a natural cooling mode throughout the year, so that after indoor air enters the indoor module 2, the indoor air is cooled by the primary evaporator 21 in the indoor module 2, and when the temperature of the air cooled by the primary evaporator 21 can reach the air supply demand temperature required by the IT equipment, the secondary refrigeration cycle passage does not work, and the indoor air is directly returned to the indoor after being cooled by the primary evaporator 21. When the air temperature cooled by the primary evaporator 21 cannot reach the air supply demand temperature required by the IT equipment, namely, when the air temperature cooled by the primary evaporator 21 is higher than the air supply demand temperature, the secondary refrigeration circulation path works, the air cooled by the primary evaporator 21 is further cooled by the secondary evaporator 22 and then returns to the room, so that when the cold provided by the primary refrigeration circulation path cannot meet all the required cold, the residual cold is provided by the secondary refrigeration circulation path.
In the exemplary embodiment, since the second-stage evaporator 22 is started to operate after the oilless compressor 4 is started, and thus the second-stage refrigeration cycle is operated, the starting condition of the oilless compressor 4 may be set such that the supply air temperature of the first-stage evaporator 21 is higher than the supply air demand temperature.
Referring to fig. 3, assuming that T1 is the return air temperature of the primary evaporator 21, that is, the air temperature before cooling by the primary evaporator 21, T2 is the air temperature after cooling by the primary evaporator 21, that is, the supply air temperature of the primary evaporator 21, T3 is the supply air temperature of the secondary evaporator 22, that is, the supply air demand temperature is T0, when the air temperature T2 of the air having the temperature T1 after cooling by the primary evaporator 21 can reach T0, that is, t2=t0, the oil-free compressor 4 is not started, so that the secondary refrigeration cycle does not operate, the air having the temperature T2 directly returns to the room, at this time T3 is equal to T2, and the operation mode of the cooling system at this time may be referred to as a fluorine pump mode. When the temperature T2 of the air cooled by the primary evaporator 21 cannot reach T0, that is, when T2 is greater than T0, the oil-free compressor 4 is started, so that the secondary refrigeration cycle passage operates, the air cooled by the primary evaporator 21 and having a temperature T2 is further cooled by the secondary evaporator 22 until t3=t0 is returned to the room, and the operation mode of the cooling system at this time may be referred to as a cold compensation mode.
By starting the oil-free compressor 4 when the supply air temperature of the primary evaporator 21 is higher than the supply air demand temperature, it is possible to realize the supply of the remaining cold energy through the secondary refrigeration cycle when the cold energy supplied by the primary refrigeration cycle cannot satisfy the total cold energy required by the apparatus.
In an exemplary embodiment, the starting condition of the oil-free compressor 4 may be further set such that the humidity of the room where the first-stage evaporator 21 is located is greater than the required humidity, so that when the humidity of the room where IT equipment is located is too high and dehumidification is required, the second-stage refrigeration cycle path works, and the air containing water vapor in the room is reduced below the dew point temperature by the second-stage evaporator 21, so that dehumidification of the room is performed by using a low evaporation temperature less than the dew point temperature of the room.
In the exemplary embodiment, the number of the liquid pumps 3 may be single or plural, and when the number of the liquid pumps 3 is plural, the plural liquid pumps 3 are connected in parallel. In practical application, the number of the liquid pumps 3 can be flexibly set according to the practical refrigeration requirement.
In an exemplary embodiment, the liquid pump 3 may be a fluorine pump and the oil-free compressor 4 may be a magnetic levitation compressor or an air levitation compressor. The motor of the oil-free compressor 4 can be a permanent magnet synchronous motor, no excitation process is adopted, and centrifugal multi-stage compression is adopted, so that the energy efficiency is higher than that of single-stage compression. The liquid pump 3 is selectively configurable according to system characteristics. The cooling system is an oil-free system, no lubricating oil is in contact with the compressed air source in the operation of the cooling system, and the discharged gas is free of oil gas and is not limited by lubricating oil, so that the problems of pipeline length, height difference, tail end quantity, energy consumption and the like of the air conditioning system can be solved.
In an exemplary embodiment, the cooling system may further include a control module connected to the oil-free compressor 4 and the liquid pump 3 for controlling the oil-free compressor 4 and the liquid pump 3.
The cooling system provided by the disclosure has a dehumidification function, and can use a wet working condition mode and a dry working condition mode, so that the defect that the dry working condition cannot be used and the wet working condition mode is required to be used for running all the year round under the condition that a normal evaporation condenser is selected when the glacier system is applied in the north is avoided.
The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (5)
1. A cooling system, the cooling system being applied to the technical field of internet data centers, comprising:
an indoor module, the indoor module comprising: a primary evaporator and a secondary evaporator;
an outdoor module, the outdoor module comprising: a primary condenser and a secondary condenser;
the outlet of the primary evaporator is connected with the inlet of the primary condenser through a pipeline, the outlet of the primary condenser is connected with the inlet of the primary evaporator through a liquid pump, the primary evaporator, the primary condenser and the liquid pump form a primary refrigeration circulation path, and the primary refrigeration circulation path runs in a natural cooling mode all year round; the inlet of the primary evaporator is connected with a primary throttle valve in series;
the outlet of the secondary evaporator is connected with the inlet of the secondary condenser through a gas suspension compressor, the outlet of the secondary condenser is connected with the inlet of the secondary evaporator through a pipeline, the secondary evaporator, the secondary condenser and the gas suspension compressor form a secondary refrigeration circulation passage, the secondary refrigeration circulation passage and the primary refrigeration circulation passage are isolated, and the secondary refrigeration circulation passage operates when the cooling capacity of the primary refrigeration circulation passage is insufficient; the motor of the air suspension compressor is a permanent magnet synchronous motor, the non-excitation process adopts centrifugal multi-stage compression, the inlet of the secondary evaporator is connected with a secondary throttle valve in series, the air suspension compressor is connected with the liquid pump in parallel, and the conditions for starting the air suspension compressor are as follows: the indoor air is cooled by the primary evaporator, the temperature of the cooled air is higher than the air supply required temperature required by IT equipment, or the humidity of the indoor of the primary evaporator is higher than the required humidity required by the IT equipment;
the outdoor modules, the indoor modules and the air suspension compressors are multiple in number, the outdoor modules and the air suspension compressors are in one-to-one correspondence with the indoor modules, the outlets of the first-stage evaporators of the indoor modules are connected with the inlets of the first-stage condensers of the corresponding outdoor modules through pipelines, the outlets of the first-stage condensers of the outdoor modules are connected with the inlets of the first-stage evaporators of the indoor modules through the liquid pumps, the outlets of the second-stage evaporators of the indoor modules are connected with the inlets of the second-stage condensers of the corresponding outdoor modules through the corresponding air suspension compressors, and the outlets of the second-stage condensers of the outdoor modules are connected with the inlets of the second-stage evaporators of the corresponding indoor modules through pipelines;
the cooling system further comprises a control module, wherein the control module is connected with the air suspension compressor and the liquid pump and used for controlling the air suspension compressor and the liquid pump.
2. The cooling system of claim 1, wherein the gas generated by the primary evaporator of the indoor module is returned to the primary evaporator of the indoor module via the corresponding primary condenser of the outdoor module, the liquid pump;
the gas generated by the secondary evaporator of the indoor module is returned to the secondary evaporator of the indoor module via the corresponding gas suspension compressor and the corresponding secondary condenser of the outdoor module.
3. The cooling system of claim 1, further comprising: and the liquid pump is connected between the inlet of the secondary evaporator of the indoor module and the outlet of the secondary condenser of the corresponding outdoor module through a pipeline.
4. The cooling system of claim 1, wherein the number of liquid pumps is a single; or alternatively, the process may be performed,
the number of the liquid pumps is multiple, and the liquid pumps are connected in parallel.
5. The cooling system of claim 1, wherein the liquid pump is a fluorine pump.
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| CN202110129454.9A CN112888262B (en) | 2021-01-29 | 2021-01-29 | Cooling system |
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| CN202110129454.9A CN112888262B (en) | 2021-01-29 | 2021-01-29 | Cooling system |
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| CN112888262B true CN112888262B (en) | 2023-08-04 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109373625A (en) * | 2018-11-14 | 2019-02-22 | 湖南东尤水汽能节能有限公司 | A kind of second level complementation steam energy heat pump unit of refrigeration in parallel and series connection heat supply |
| CN111565546A (en) * | 2020-05-29 | 2020-08-21 | 克莱门特捷联制冷设备(上海)有限公司 | Oil-free efficient refrigeration system for data center and control method thereof |
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| KR20140058518A (en) * | 2011-06-30 | 2014-05-14 | 파커-한니핀 코포레이션 | Pumped liquid cooling system using a phase change fluid with additional sub-ambient cooling |
| CN106949653B (en) * | 2017-04-06 | 2019-12-10 | 北京百度网讯科技有限公司 | Cooling system applied to data center |
| CN108775721B (en) * | 2018-07-27 | 2019-10-29 | 珠海格力电器股份有限公司 | Cooling system and its control method |
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| CN109373625A (en) * | 2018-11-14 | 2019-02-22 | 湖南东尤水汽能节能有限公司 | A kind of second level complementation steam energy heat pump unit of refrigeration in parallel and series connection heat supply |
| CN111565546A (en) * | 2020-05-29 | 2020-08-21 | 克莱门特捷联制冷设备(上海)有限公司 | Oil-free efficient refrigeration system for data center and control method thereof |
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