WO2019214297A1 - Server room air conditioning system - Google Patents

Server room air conditioning system Download PDF

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Publication number
WO2019214297A1
WO2019214297A1 PCT/CN2019/073159 CN2019073159W WO2019214297A1 WO 2019214297 A1 WO2019214297 A1 WO 2019214297A1 CN 2019073159 W CN2019073159 W CN 2019073159W WO 2019214297 A1 WO2019214297 A1 WO 2019214297A1
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WO
WIPO (PCT)
Prior art keywords
air conditioning
conditioning system
room air
electronic expansion
expansion valve
Prior art date
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PCT/CN2019/073159
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French (fr)
Chinese (zh)
Inventor
杨公增
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青岛海尔空调电子有限公司
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Publication of WO2019214297A1 publication Critical patent/WO2019214297A1/en

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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
    • H05K7/20718—Forced ventilation of a gaseous coolant
    • H05K7/20745—Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/191—Pressures near an expansion valve

Definitions

  • the invention belongs to the technical field of computer room air conditioners, and particularly provides a computer room air conditioning system.
  • the computer room air conditioning system needs to cool the electronic equipment in the electronic equipment room, that is, the computer room air conditioning system needs to be cooled throughout the year.
  • the air conditioning system in the computer room often has a low condensing pressure during the cooling operation, and an alarm such as an alarm occurs, so that the unit cannot operate normally.
  • very strict requirements are imposed on the annual cooling operation of the computer room air-conditioning products, especially the low-temperature environment refrigeration or ultra-low temperature environment.
  • the method of reducing the rotational speed of the outdoor fan is generally used to improve the condensing pressure of the low temperature ambient air conditioning system. That is, the outdoor unit fan speed is generally adjusted by detecting the outdoor unit condenser pressure or temperature signal value, so that the air conditioning system condensing pressure is maintained near the set value for the cooling operation.
  • this scheme of adjusting the outdoor fan speed to adapt to the outdoor low-temperature temperature for low-temperature cooling has certain requirements on the outdoor ring temperature use range.
  • the downwind speed scheme can generally only meet the requirements of minus 15
  • the ultra-low temperature environment of about 30 °C in winter is very common, so this wind speed reduction scheme can not guarantee the winter cooling demand of the computer room in the region.
  • most of the computer rooms are in the same building as the regular office area. Due to the relatively large volume of air-conditioning equipment, the outdoor heat-dissipating condenser is generally placed on the floor or the roof of the building during the arrangement. The machine has a certain length of piping and high and low drop. Due to the loss of pipeline resistance and the loss of the drop, the allowable piping length and drop of the unit sometimes cannot meet the actual needs of the project.
  • the present invention provides a computer room air conditioning system and a computer room.
  • the air conditioning system includes a condenser, an evaporator, a compressor, a liquid accumulator, and an electronic expansion valve.
  • the condenser, the accumulator, the electronic expansion valve, the evaporator, and the compressor form a closed loop main circuit, and the computer room air conditioning system also includes a supercharging system.
  • the component, the booster assembly can assist the compressor to increase the refrigerant pressure by accessing the main circuit of the circulation, and replace the function of the compressor when the air conditioning system of the computer room is energy-saving.
  • the pressure increasing component includes a boosting circulation pump and a first electromagnetic valve arranged in parallel, and the boosting circulation pump and the first electromagnetic valve are disposed together on the circulating main road, and the first electromagnetic valve can be controlled.
  • the booster circulation pump is selectively connected to the main circuit of the cycle.
  • the upstream side of the electronic expansion valve is provided with a pressure sensor for detecting the upstream side pressure of the electronic expansion valve.
  • the boosting circulation pump in a case where the upstream side pressure of the electronic expansion valve is less than the set pressure threshold, the boosting circulation pump is connected to the circulation main path.
  • the booster circulation pump is not connected to the circulation main path in the case where the upstream side pressure of the electronic expansion valve is greater than or equal to the set pressure threshold.
  • a second electromagnetic valve disposed in parallel with the electronic expansion valve is disposed on the circulation main road, and the second electromagnetic valve is capable of controlling the electronic expansion valve to selectively access the circulation main path.
  • a third electromagnetic valve and a fourth electromagnetic valve are disposed on the main circulation road, and the third electromagnetic valve is disposed in series with the compressor and is disposed in parallel with the fourth electromagnetic valve.
  • the booster assembly is disposed between the accumulator and the electronic expansion valve.
  • the booster assembly is disposed between the condenser and the accumulator.
  • the compressor can be assisted by the pressurizing assembly to further increase the pressure of the refrigerant, so that in the case of ultra-low temperature, if the pressure of the refrigerant cannot be ensured by the compressor alone, it can be increased.
  • the pressure component is compensated to ensure the normal operation of the air conditioning system in the equipment room, that is, the air conditioning system of the equipment room can be continuously cooled, so that the electronic equipment in the equipment room can always work in a suitable ambient temperature, so that the air conditioning system of the equipment room can always be stable and reliable. run.
  • the compressor can be turned off, and only the pressurized component is used to maintain the normal operation of the air-conditioning system of the equipment room, thereby utilizing the indoor and outdoor temperature difference.
  • the natural cooling cycle is performed, so that the computer room air conditioning system can be energy-saving, effectively reducing the PUE index of the equipment room and reducing the operating cost of the equipment room.
  • the air conditioning system of the computer room of the invention can improve its own adaptability, so that the air conditioning system of the computer room can adapt to more occasions, for example, the pipe length can be increased to some extent and the height drop limit can be widened, thereby making the machine room
  • the air conditioning system can meet the installation requirements of various building forms.
  • the pressure sensor can detect the upstream side pressure of the electronic expansion valve in real time, that is, the pressure difference between the upstream and the downstream of the electronic expansion valve can be indirectly obtained, and the pressure difference is relatively large (specifically, the upstream side pressure of the electronic expansion valve is greater than or equal to the setting).
  • pressure threshold the computer room air conditioning system can directly perform normal cooling operation, and the pressure difference is relatively small (specifically, the upstream side pressure of the electronic expansion valve is less than the set pressure threshold), the computer room air conditioning system cannot perform normal operation.
  • the computer room air conditioning system can work normally in both the low temperature environment and the ultra-low temperature environment, further improving the operational reliability of the computer room air conditioning system and ensuring the electronics in the equipment room.
  • the device is always able to operate in the most suitable temperature environment.
  • the third electromagnetic valve and the fourth electromagnetic valve can flexibly switch the computer room air conditioning system between the conventional cooling mode (including the low temperature cooling operation mode and the ultra low temperature cooling operation mode) and the energy saving mode, thereby improving the air conditioning system of the computer room. Control flexibility and enable the computer room air conditioning system to operate stably and reliably.
  • FIG. 1 is a schematic structural view of a computer room air conditioning system of the present invention
  • FIG. 2 is a schematic structural view of a computer room air conditioning system of the present invention in a normal cooling operation mode
  • FIG. 3 is a schematic structural view of a computer room air conditioning system of the present invention in an ultra-low temperature cooling operation mode
  • FIG. 4 is a schematic structural view of a computer room air conditioning system of the present invention in an energy-saving operation mode.
  • connection may also be a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • connection may also be a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the present invention provides a computer room air conditioning system, which aims to make the computer room air conditioning system
  • the low temperature environment can work normally even in the ultra-low temperature environment, and the piping length of the air conditioning system of the computer room can be increased to some extent and the height drop limit can be widened, so that the air conditioning system of the computer room can meet the installation requirements of various building forms.
  • the computer room air conditioning system of the present invention comprises a compressor 1, a condenser 3, an accumulator 4, an electronic expansion valve 8 and an evaporator 9, a condenser 3, a reservoir 4, and an electronic expansion valve.
  • the evaporator 9 and the compressor 1 form a closed loop main circuit, and the downstream side of the compressor 1 is provided with a check valve 2, and the pressurizing assembly of the present invention can assist the compressor 1 to lift the refrigerant in a manner of accessing the circulating main road. Pressure, and the function of replacing compressor 1 when the computer room air conditioning system is running energy-efficient.
  • the supercharging assembly can adopt the structure that the boosting circulation pump 5 and the electromagnetic valve cooperate, or adopt the structure of the supercharger, or adopt other supercharging structure, and those skilled in the art can flexibly set the increase in practical applications.
  • the specific structure of the pressure component can be used to assist the compressor 1 to increase the refrigerant pressure by means of the pressure-increasing component in the manner of accessing the circulation main road, and to replace the function of the compressor 1 in the energy-saving operation of the engine room air-conditioning system.
  • a pressurizing assembly may be disposed between the accumulator 4 and the electronic expansion valve 8, and may also be disposed between the condenser 3 and the accumulator 4, and those skilled in the art may flexibly set the pressurizing assembly in practical applications.
  • the specific setting position can be used as long as the pressure of the refrigerant can be increased by the pressurizing assembly, and the function of the compressor 1 can be replaced when the air conditioning system of the computer room is energy-saving.
  • the pressurizing assembly comprises a booster circulation pump 5 and a first solenoid valve 6 arranged in parallel, the booster circulation pump 5 and the first solenoid valve 6 are disposed together on the main circuit of the circulation, and the first solenoid valve 6 can control the supercharging cycle Pump 5 is selectively connected to the main circuit of the cycle.
  • the first solenoid valve 6 is opened, the booster circulation pump 5 cannot be connected to the circulation main path, the first solenoid valve 6 is closed, and the booster circulation pump 5 is connected to the circulation main path.
  • the low-temperature refrigeration system has a low voltage or other alarm failure, which causes the computer room air conditioning system to fail to operate normally.
  • the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is insufficient, that is, the refrigerant in the air conditioning system of the computer room cannot be normal.
  • the flow cycle is caused by the pressure sensor 12 on the upstream side of the electronic expansion valve 8, and the pressure sensor 12 is for detecting the upstream side pressure of the electronic expansion valve 8.
  • the pressure on the upstream side of the electronic expansion valve 8 can be detected by the pressure sensor 12, thereby indirectly determining the pressure difference between the upstream and downstream sides of the electronic expansion valve 8, and in the case where the pressure on the upstream side of the electronic expansion valve 8 is less than the set pressure threshold, the pressure is increased.
  • the circulation pump 5 is connected to the circulation main path; in the case where the upstream side pressure of the electronic expansion valve 8 is greater than or equal to the set pressure threshold, the boost circulation pump 5 is not connected to the circulation main path.
  • the circulation main path is provided with a second electromagnetic valve 7 provided in parallel with the electronic expansion valve 8, and the second electromagnetic valve 7 is capable of controlling the electronic expansion valve 8 to selectively access the circulation main path.
  • the electronic expansion valve 8 is disposed in series with the pressure sensor 12 and is disposed in parallel with the second electromagnetic valve 7. When the second electromagnetic valve 7 is opened, the electronic expansion valve 8 is not connected to the circulation main path, and the second electromagnetic valve When 7 is closed, the electronic expansion valve 8 is connected to the main circuit of the cycle.
  • the third main solenoid valve 10 and the fourth electromagnetic valve 11 are disposed on the main circulation path, and the third electromagnetic valve 10 is disposed in series with the compressor 1 and is disposed in parallel with the fourth electromagnetic valve 11.
  • the compressor 1 is connected to the circulation main path; when the third electromagnetic valve 10 is closed and the fourth electromagnetic valve 11 is opened, the compressor 1 is Take out the loop main road.
  • the pressure sensor 12 detects the upstream side pressure Pd ⁇ Pd0 + ⁇ P of the electronic expansion valve 8, it is indicated that the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is sufficient, and the room air conditioning system enters the normal cooling.
  • the operating state that is, the boosting circulation pump 5 does not need to be connected to the circulation main road, at this time, the first electromagnetic valve 6 and the third electromagnetic valve 10 are opened, the second electromagnetic valve 7 and the fourth electromagnetic valve 11 are closed, and the compressor 1 is started normally.
  • the outdoor fan is operated in accordance with the pressure value Pd detected by the pressure sensor 12.
  • the cooling operation state that is, the boosting circulation pump 5 needs to be connected to the circulation main road, at which time the first electromagnetic valve 6, the second electromagnetic valve 7 and the fourth electromagnetic valve 11 are closed, the third electromagnetic valve 10 is opened, and the boosting circulation pump 5 is Simultaneously opening with the compressor 1, the refrigerant pressure on the upstream side of the electronic expansion valve 8 is raised by the boosting circulation pump 5 until the room air conditioning system can stably operate within the permissible range, thereby realizing stable and reliable operation of the unit in an ultra-low temperature environment. .
  • the cooling capacity of the cooling room air conditioner is correspondingly reduced due to the corresponding heat generation of the electronic device.
  • the computer room air conditioning system of the present invention can be operated in an energy-saving mode, thereby reducing the PUE of the equipment room and saving the operating cost of the equipment room.
  • the computer room air conditioning system can enter the energy-saving operation mode, at which time the first solenoid valve 6 and the third solenoid valve 10 are closed, and the second solenoid valve 7 and the fourth solenoid valve 11 are opened, so that the compressor 1 is closed and connected.
  • the main circuit is circulated, and then the booster circulation pump 5 is separately opened to provide the refrigerant circulation power in the air conditioning system of the machine room, and then the natural cooling cycle is performed by using the indoor and outdoor temperature difference.
  • those skilled in the art can flexibly set the specific value of the above ⁇ T in practical applications, as long as the setting of ⁇ T can determine whether the computer room air conditioning system can enter the energy-saving operation mode.
  • PUE refers to the abbreviation of Power Usage Effectiveness, which is an index for evaluating data center energy efficiency, and is the ratio of all energy consumed by the data center to the energy used by the IT load, which has become an international A comparative measure of data center power usage efficiency, and the closer the PUE value is to 1, the higher the greening of a data center.
  • the aforementioned Pd0 may be a preset pressure value, and ⁇ P is a threshold value.
  • ⁇ P is a threshold value.
  • Pd0 may be used as a demarcation point for determining whether the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is sufficient.
  • ⁇ P ⁇ two values of Pd0 + ⁇ P and Pd0 - ⁇ P can be respectively used as a demarcation point for judging whether or not the pressure difference on the upstream and downstream sides of the electronic expansion valve 8 is sufficient.
  • the aforementioned set pressure threshold may be one value or two values, and those skilled in the art may flexibly set the set pressure threshold in practical applications, as long as the electronic pressure can be determined by setting the pressure threshold. Whether the pressure difference on the upstream and downstream sides of the expansion valve 8 is sufficient, and the adjustment and change of the set pressure threshold are not deviated from the principle and scope of the present invention, and should be limited to the scope of the present invention.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
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Abstract

The present invention relates to the technical field of server room air conditioners, and aims to solve the problem in which normal operation of existing server room air conditioning systems is not guaranteed in extremely low temperature environments and installation of such server room air conditioning systems is not convenient. Provided is a server room air conditioning system, comprising: a condenser; an evaporator; a compressor; a liquid storage device; and an electronic expansion valve. The condenser, the liquid storage device, the electronic expansion valve, the evaporator and the compressor form a closed-loop main circulation circuit. The server room air conditioning system further comprises a pressure-increasing assembly. The pressure-increasing assembly can be connected to the main circulation circuit to assist the compressor in increasing a pressure of a refrigerant, and can function as the compressor when the air conditioning system is operating in an energy-saving mode. The present invention enables a server room air conditioning system to operate normally in extremely low temperature environments, and can increase a length of a pipe of the server room air conditioning system to a certain extent and reduce height level difference limitations of the server room air conditioning system, such that the server room air conditioning system can meet various installation requirements of different types of buildings.

Description

机房空调***Computer room air conditioning system 技术领域Technical field
本发明属于机房空调技术领域，具体提供一种机房空调***。The invention belongs to the technical field of computer room air conditioners, and particularly provides a computer room air conditioning system.
背景技术Background technique
随着互联网经济的快速发展，许多网络电子机房被建设出来。机房内的电子设备全年运行，会散发出大量热量，相应地需要机房空调***对电子机房内的电子设备进行降温，即需要机房空调***全年制冷运行。在冬季室外温度较低的情况下，机房空调***在制冷运行时往往存在冷凝压力较低从而出现报警等故障，从而使机组无法正常运转。为了保证机房内电子设备的正常降温需求，对机房空调产品全年制冷运行尤其是低温环境制冷或超低温环境安全可靠制冷运行提出了非常严格的要求。With the rapid development of the Internet economy, many network electronic equipment rooms have been built. The electronic equipment in the equipment room runs all year round, and it will emit a lot of heat. Correspondingly, the computer room air conditioning system needs to cool the electronic equipment in the electronic equipment room, that is, the computer room air conditioning system needs to be cooled throughout the year. In the case of low outdoor temperature in winter, the air conditioning system in the computer room often has a low condensing pressure during the cooling operation, and an alarm such as an alarm occurs, so that the unit cannot operate normally. In order to ensure the normal cooling demand of electronic equipment in the equipment room, very strict requirements are imposed on the annual cooling operation of the computer room air-conditioning products, especially the low-temperature environment refrigeration or ultra-low temperature environment.
现有技术中，通常采用降低室外风机转速的方式来提升低温环境空调***的冷凝压力。即一般通过检测室外机冷凝器压力或温度信号值进行室外机风机转速的调整，使空调***冷凝压力维持在设定值附近以进行制冷运行。然而，这种通过调整室外风机转速来适应室外低环温进行低温制冷的方案对室外环温的使用范围有一定的要求，经过大量的工程经验表明，采用降风速方案一般仅能满足零下15℃以上情况下的空调***的稳定运行，当环温继续降低时，该方案就很难保证空调***的正常运行。例如，在中国的东北、内蒙等北方地区冬季零下30℃左右的超低温环境非常常见，因而此降风速的方案无法保障该地区的机房冬季制冷需求。除此之外，大部分机房与常规办公区域在同一座建筑物内，由于空调设备的体积比较大，在布置时一般是将室外散热冷凝器放置在地面或建筑物的楼顶上，相应内外机存有一定的配管长度和高低落差，由于管路阻力损失和落差损失的存在，机组允许的配管长度和落差有时不能很好地满足工程实际需要。In the prior art, the method of reducing the rotational speed of the outdoor fan is generally used to improve the condensing pressure of the low temperature ambient air conditioning system. That is, the outdoor unit fan speed is generally adjusted by detecting the outdoor unit condenser pressure or temperature signal value, so that the air conditioning system condensing pressure is maintained near the set value for the cooling operation. However, this scheme of adjusting the outdoor fan speed to adapt to the outdoor low-temperature temperature for low-temperature cooling has certain requirements on the outdoor ring temperature use range. After a large amount of engineering experience, the downwind speed scheme can generally only meet the requirements of minus 15 The stable operation of the air conditioning system under the above conditions of °C, when the ring temperature continues to decrease, the program is difficult to ensure the normal operation of the air conditioning system. For example, in the northeast of China, Inner Mongolia and other northern regions, the ultra-low temperature environment of about 30 °C in winter is very common, so this wind speed reduction scheme can not guarantee the winter cooling demand of the computer room in the region. In addition, most of the computer rooms are in the same building as the regular office area. Due to the relatively large volume of air-conditioning equipment, the outdoor heat-dissipating condenser is generally placed on the floor or the roof of the building during the arrangement. The machine has a certain length of piping and high and low drop. Due to the loss of pipeline resistance and the loss of the drop, the allowable piping length and drop of the unit sometimes cannot meet the actual needs of the project.
因此，本领域需要一种新的机房空调***来解决上述问题。Therefore, there is a need in the art for a new computer room air conditioning system to address the above problems.
发明内容Summary of the invention
为了解决现有技术中的上述问题，即为了解决现有机房空调***在超低温环境下无法保证自身的正常运行以及不便于机房空调***安装布置的问题，本发明提供了一种机房空调***，机房空调***包括冷凝器、蒸发器、压缩机、储液器和电子膨胀阀，冷凝器、储液器、电子膨胀阀、蒸发器和压缩机形成闭环的循环主路，机房空调***还包括增压组件，增压组件能够以接入循环主路的方式辅助压缩机提升冷媒压力，以及在机房空调***节能运行时代替压缩机的功能。In order to solve the above problems in the prior art, in order to solve the problem that the existing computer room air conditioning system cannot guarantee its normal operation in an ultra-low temperature environment and the installation arrangement of the computer room air conditioning system is inconvenient, the present invention provides a computer room air conditioning system and a computer room. The air conditioning system includes a condenser, an evaporator, a compressor, a liquid accumulator, and an electronic expansion valve. The condenser, the accumulator, the electronic expansion valve, the evaporator, and the compressor form a closed loop main circuit, and the computer room air conditioning system also includes a supercharging system. The component, the booster assembly, can assist the compressor to increase the refrigerant pressure by accessing the main circuit of the circulation, and replace the function of the compressor when the air conditioning system of the computer room is energy-saving.
在上述机房空调***的优选技术方案中，增压组件包括并联设置的增压循环泵和第一电磁阀，增压循环泵和第一电磁阀共同设置在循环主路上，第一电磁阀能够控制增压循环泵选择性地接入循环主路。In a preferred technical solution of the above-mentioned computer room air conditioning system, the pressure increasing component includes a boosting circulation pump and a first electromagnetic valve arranged in parallel, and the boosting circulation pump and the first electromagnetic valve are disposed together on the circulating main road, and the first electromagnetic valve can be controlled. The booster circulation pump is selectively connected to the main circuit of the cycle.
在上述机房空调***的优选技术方案中，电子膨胀阀的上游侧设置有压力传感器，压力传感器用于检测电子膨胀阀的上游侧压力。In a preferred embodiment of the above-described room air conditioning system, the upstream side of the electronic expansion valve is provided with a pressure sensor for detecting the upstream side pressure of the electronic expansion valve.
在上述机房空调***的优选技术方案中，在电子膨胀阀的上游侧压力小于设定压力阈值的情形下，增压循环泵接入循环主路。In a preferred technical solution of the above-mentioned computer room air conditioning system, in a case where the upstream side pressure of the electronic expansion valve is less than the set pressure threshold, the boosting circulation pump is connected to the circulation main path.
在上述机房空调***的优选技术方案中，在电子膨胀阀的上游侧压力大于或等于设定压力阈值的情形下，增压循环泵不接入循环主路。In a preferred embodiment of the above-described room air conditioning system, the booster circulation pump is not connected to the circulation main path in the case where the upstream side pressure of the electronic expansion valve is greater than or equal to the set pressure threshold.
在上述机房空调***的优选技术方案中，循环主路上设置有与电子膨胀阀并联设置的第二电磁阀，第二电磁阀能够控制电子膨胀阀选择性地接入循环主路。In a preferred technical solution of the above-mentioned computer room air conditioning system, a second electromagnetic valve disposed in parallel with the electronic expansion valve is disposed on the circulation main road, and the second electromagnetic valve is capable of controlling the electronic expansion valve to selectively access the circulation main path.
在上述机房空调***的优选技术方案中，循环主路上设置有第三电磁阀和第四电磁阀，第三电磁阀与压缩机串联设置并共同与第四电磁阀并联设置。In a preferred technical solution of the above-mentioned room air conditioning system, a third electromagnetic valve and a fourth electromagnetic valve are disposed on the main circulation road, and the third electromagnetic valve is disposed in series with the compressor and is disposed in parallel with the fourth electromagnetic valve.
在上述机房空调***的优选技术方案中，增压组件设置在储液器与电子膨胀阀之间。In a preferred embodiment of the computer room air conditioning system described above, the booster assembly is disposed between the accumulator and the electronic expansion valve.
在上述机房空调***的优选技术方案中，增压组件设置在冷凝器与储液器之间。In a preferred embodiment of the computer room air conditioning system described above, the booster assembly is disposed between the condenser and the accumulator.
本领域技术人员能够理解的是，在本发明的优选技术方案中，通过增压组件可以辅助压缩机来进一步提升冷媒压力，使得在超低 温情况下如果单独通过压缩机无法保证冷媒压力时可以通过增压组件来进行补偿，从而保证机房空调***的正常运行，即保证机房空调***能够持续制冷运行，使机房内的电子设备始终在合适的环境温度中工作，从而使机房空调***始终能够稳定可靠地运行。此外，在机房内的电子设备进行低负荷工作时，由于电子设备本身的发热量较小，可以将压缩机关闭，只通过增压组件来维持机房空调***的正常运行，从而利用室内外温差来进行自然冷却循环制冷，进而使机房空调***可以节能运行，有效地降低机房的PUE指标，降低机房运行成本。同时，通过本发明的机房空调***，可以提高其自身的适应性，使机房空调***能够适应更多的场合，例如，可以在一定程度上提高其配管长度以及拓宽其高度落差限制，从而使机房空调***可以满足各种不同建筑形式的安装要求。It can be understood by those skilled in the art that in the preferred technical solution of the present invention, the compressor can be assisted by the pressurizing assembly to further increase the pressure of the refrigerant, so that in the case of ultra-low temperature, if the pressure of the refrigerant cannot be ensured by the compressor alone, it can be increased. The pressure component is compensated to ensure the normal operation of the air conditioning system in the equipment room, that is, the air conditioning system of the equipment room can be continuously cooled, so that the electronic equipment in the equipment room can always work in a suitable ambient temperature, so that the air conditioning system of the equipment room can always be stable and reliable. run. In addition, when the electronic equipment in the equipment room is under low-load operation, since the heat generated by the electronic equipment itself is small, the compressor can be turned off, and only the pressurized component is used to maintain the normal operation of the air-conditioning system of the equipment room, thereby utilizing the indoor and outdoor temperature difference. The natural cooling cycle is performed, so that the computer room air conditioning system can be energy-saving, effectively reducing the PUE index of the equipment room and reducing the operating cost of the equipment room. At the same time, the air conditioning system of the computer room of the invention can improve its own adaptability, so that the air conditioning system of the computer room can adapt to more occasions, for example, the pipe length can be increased to some extent and the height drop limit can be widened, thereby making the machine room The air conditioning system can meet the installation requirements of various building forms.
进一步地，通过压力传感器可以实时检测电子膨胀阀的上游侧压力，即可以间接获得电子膨胀阀上下游的压差，在压差比较大(具体为电子膨胀阀的上游侧压力大于或等于设定压力阈值)的情况下，机房空调***可以直接进行正常的制冷运行，而压差比较小(具体为电子膨胀阀的上游侧压力小于设定压力阈值)的情况下，机房空调***无法进行正常的制冷运行，此时需要提高电子膨胀阀上游侧的冷媒压力，使电子膨胀阀上下游的压差增大，从而保证机房空调***进行正常的制冷运行。通过这样的设置，即通过设定压力阈值的设置，可以使机房空调***无论是在低温环境还是在超低温环境下均可以正常工作，进一步地提高机房空调***的运行可靠性，保证机房内的电子设备能够始终在最合适的温度环境下运行。Further, the pressure sensor can detect the upstream side pressure of the electronic expansion valve in real time, that is, the pressure difference between the upstream and the downstream of the electronic expansion valve can be indirectly obtained, and the pressure difference is relatively large (specifically, the upstream side pressure of the electronic expansion valve is greater than or equal to the setting). In the case of pressure threshold), the computer room air conditioning system can directly perform normal cooling operation, and the pressure difference is relatively small (specifically, the upstream side pressure of the electronic expansion valve is less than the set pressure threshold), the computer room air conditioning system cannot perform normal operation. In the cooling operation, it is necessary to increase the pressure of the refrigerant on the upstream side of the electronic expansion valve to increase the pressure difference between the upstream and downstream of the electronic expansion valve, thereby ensuring normal cooling operation of the air conditioning system of the equipment room. Through such a setting, that is, by setting the pressure threshold, the computer room air conditioning system can work normally in both the low temperature environment and the ultra-low temperature environment, further improving the operational reliability of the computer room air conditioning system and ensuring the electronics in the equipment room. The device is always able to operate in the most suitable temperature environment.
更进一步地，通过第三电磁阀和第四电磁阀可以使机房空调***灵活地在常规制冷模式(包括低温制冷运行模式和超低温制冷运行模式)和节能模式之间切换，从而提高对机房空调***控制的灵活性，并且使机房空调***能够稳定可靠地运行。Further, the third electromagnetic valve and the fourth electromagnetic valve can flexibly switch the computer room air conditioning system between the conventional cooling mode (including the low temperature cooling operation mode and the ultra low temperature cooling operation mode) and the energy saving mode, thereby improving the air conditioning system of the computer room. Control flexibility and enable the computer room air conditioning system to operate stably and reliably.
附图说明DRAWINGS
图1是本发明的机房空调***的结构示意图；1 is a schematic structural view of a computer room air conditioning system of the present invention;
图2是本发明的机房空调***在正常制冷运行模式下的结构示意图；2 is a schematic structural view of a computer room air conditioning system of the present invention in a normal cooling operation mode;
图3是本发明的机房空调***在超低温制冷运行模式下的结构示意图；3 is a schematic structural view of a computer room air conditioning system of the present invention in an ultra-low temperature cooling operation mode;
图4是本发明的机房空调***在节能运行模式下的结构示意图。4 is a schematic structural view of a computer room air conditioning system of the present invention in an energy-saving operation mode.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention.
需要说明的是，在本发明的描述中，术语“上”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、“第三”、“第四”仅用于描述目的，而不能理解为指示或暗示相对重要性。It should be noted that, in the description of the present invention, the terms of the directions of "upper", "inside", "outside", etc., or the positional relationship are based on the orientation or positional relationship shown in the drawings, which is merely for convenience. It is to be understood that the invention is not to be construed as a limitation Moreover, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“设置”、“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。In addition, it should be noted that in the description of the present invention, the terms "set", "install", "connected", and "connected" should be understood broadly, and may be fixed, for example, unless otherwise explicitly defined and defined. The connection may also be a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
基于背景技术指出的现有机房空调***在超低温环境下无法保证自身的正常运行以及不便于机房空调***安装布置的问题，本发明提供了一种机房空调***，旨在使机房空调***无论是在低温环境还是在超低温环境下均可以正常工作，并且可以在一定程度上提高机房空调***的配管长度以及拓宽其高度落差限制，从而使机房空调***可以满足各种不同建筑形式的安装要求。Based on the background art, the existing computer room air conditioning system cannot guarantee its normal operation and the installation and arrangement of the computer room air conditioning system in an ultra-low temperature environment. The present invention provides a computer room air conditioning system, which aims to make the computer room air conditioning system The low temperature environment can work normally even in the ultra-low temperature environment, and the piping length of the air conditioning system of the computer room can be increased to some extent and the height drop limit can be widened, so that the air conditioning system of the computer room can meet the installation requirements of various building forms.
具体地，如图1所示，本发明的机房空调***包括压缩机1、冷凝器3、储液器4、电子膨胀阀8和蒸发器9，冷凝器3、储液器4、电子膨胀阀8、蒸发器9和压缩机1形成闭环的循环主路，压缩机1的下游侧设置有单向阀2，本发明的增压组件能够以接入循环主路的方式辅助压 缩机1提升冷媒压力，以及在机房空调***节能运行时代替压缩机1的功能。其中，增压组件可以采用增压循环泵5和电磁阀相配合的结构，亦或者采用增压器的结构，再或者采用其他增压结构，本领域技术人员可以在实际应用中灵活地设置增压组件的具体结构，只要通过增压组件能够以接入循环主路的方式辅助压缩机1提升冷媒压力，以及在机房空调***节能运行时代替压缩机1的功能即可。此外，增压组件可以设置在储液器4与电子膨胀阀8之间，还可以设置在冷凝器3与储液器4之间，本领域技术人员可以在实际应用中灵活地设置增压组件的具体设置位置，只要通过增压组件能够提升冷媒压力，并且能够在机房空调***节能运行时代替压缩机1的功能即可。Specifically, as shown in FIG. 1, the computer room air conditioning system of the present invention comprises a compressor 1, a condenser 3, an accumulator 4, an electronic expansion valve 8 and an evaporator 9, a condenser 3, a reservoir 4, and an electronic expansion valve. 8. The evaporator 9 and the compressor 1 form a closed loop main circuit, and the downstream side of the compressor 1 is provided with a check valve 2, and the pressurizing assembly of the present invention can assist the compressor 1 to lift the refrigerant in a manner of accessing the circulating main road. Pressure, and the function of replacing compressor 1 when the computer room air conditioning system is running energy-efficient. Wherein, the supercharging assembly can adopt the structure that the boosting circulation pump 5 and the electromagnetic valve cooperate, or adopt the structure of the supercharger, or adopt other supercharging structure, and those skilled in the art can flexibly set the increase in practical applications. The specific structure of the pressure component can be used to assist the compressor 1 to increase the refrigerant pressure by means of the pressure-increasing component in the manner of accessing the circulation main road, and to replace the function of the compressor 1 in the energy-saving operation of the engine room air-conditioning system. In addition, a pressurizing assembly may be disposed between the accumulator 4 and the electronic expansion valve 8, and may also be disposed between the condenser 3 and the accumulator 4, and those skilled in the art may flexibly set the pressurizing assembly in practical applications. The specific setting position can be used as long as the pressure of the refrigerant can be increased by the pressurizing assembly, and the function of the compressor 1 can be replaced when the air conditioning system of the computer room is energy-saving.
优选地，增压组件包括并联设置的增压循环泵5和第一电磁阀6，增压循环泵5和第一电磁阀6共同设置在循环主路上，第一电磁阀6能够控制增压循环泵5选择性地接入循环主路。如图1所示，第一电磁阀6打开时，增压循环泵5无法接入循环主路，第一电磁阀6关闭，增压循环泵5接入循环主路。Preferably, the pressurizing assembly comprises a booster circulation pump 5 and a first solenoid valve 6 arranged in parallel, the booster circulation pump 5 and the first solenoid valve 6 are disposed together on the main circuit of the circulation, and the first solenoid valve 6 can control the supercharging cycle Pump 5 is selectively connected to the main circuit of the cycle. As shown in FIG. 1, when the first solenoid valve 6 is opened, the booster circulation pump 5 cannot be connected to the circulation main path, the first solenoid valve 6 is closed, and the booster circulation pump 5 is connected to the circulation main path.
优选地，低温制冷***出现低压或者其他报警故障而导致机房空调***无法正常运行的根本原因是电子膨胀阀8的上下游侧的压差不够，即，是由于机房空调***内的冷媒无法正常节流循环所引起的，因此，电子膨胀阀8的上游侧设置有压力传感器12，压力传感器12用于检测电子膨胀阀8的上游侧压力。通过压力传感器12可以检测电子膨胀阀8的上游侧压力，从而间接判断电子膨胀阀8的上下游侧的压差，在电子膨胀阀8的上游侧压力小于设定压力阈值的情形下，增压循环泵5接入循环主路；在电子膨胀阀8的上游侧压力大于或等于设定压力阈值的情形下，增压循环泵5不接入循环主路。Preferably, the low-temperature refrigeration system has a low voltage or other alarm failure, which causes the computer room air conditioning system to fail to operate normally. The pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is insufficient, that is, the refrigerant in the air conditioning system of the computer room cannot be normal. The flow cycle is caused by the pressure sensor 12 on the upstream side of the electronic expansion valve 8, and the pressure sensor 12 is for detecting the upstream side pressure of the electronic expansion valve 8. The pressure on the upstream side of the electronic expansion valve 8 can be detected by the pressure sensor 12, thereby indirectly determining the pressure difference between the upstream and downstream sides of the electronic expansion valve 8, and in the case where the pressure on the upstream side of the electronic expansion valve 8 is less than the set pressure threshold, the pressure is increased. The circulation pump 5 is connected to the circulation main path; in the case where the upstream side pressure of the electronic expansion valve 8 is greater than or equal to the set pressure threshold, the boost circulation pump 5 is not connected to the circulation main path.
进一步优选地，循环主路上设置有与电子膨胀阀8并联设置的第二电磁阀7，第二电磁阀7能够控制电子膨胀阀8选择性地接入循环主路。如图1所示，电子膨胀阀8与压力传感器12串联设置并共同与第二电磁阀7并联设置，第二电磁阀7打开时，电子膨胀阀8未接入循环主路，第二电磁阀7关闭时，电子膨胀阀8接入循环主路。Further preferably, the circulation main path is provided with a second electromagnetic valve 7 provided in parallel with the electronic expansion valve 8, and the second electromagnetic valve 7 is capable of controlling the electronic expansion valve 8 to selectively access the circulation main path. As shown in FIG. 1, the electronic expansion valve 8 is disposed in series with the pressure sensor 12 and is disposed in parallel with the second electromagnetic valve 7. When the second electromagnetic valve 7 is opened, the electronic expansion valve 8 is not connected to the circulation main path, and the second electromagnetic valve When 7 is closed, the electronic expansion valve 8 is connected to the main circuit of the cycle.
进一步优选地，循环主路上设置有第三电磁阀10和第四电磁阀11，第三电磁阀10与压缩机1串联设置并共同与第四电磁阀11并 联设置。如图1所示，当第三电磁阀10打开且第四电磁阀11关闭时，压缩机1接入循环主路；当第三电磁阀10关闭且第四电磁阀11打开时，压缩机1接出循环主路。Further preferably, the third main solenoid valve 10 and the fourth electromagnetic valve 11 are disposed on the main circulation path, and the third electromagnetic valve 10 is disposed in series with the compressor 1 and is disposed in parallel with the fourth electromagnetic valve 11. As shown in FIG. 1, when the third solenoid valve 10 is opened and the fourth solenoid valve 11 is closed, the compressor 1 is connected to the circulation main path; when the third electromagnetic valve 10 is closed and the fourth electromagnetic valve 11 is opened, the compressor 1 is Take out the loop main road.
下面结合机房空调***在正常制冷运行、超低温制冷运行以及节能运行三种模式下的具体实施工况来进一步地阐述本发明的技术方案。The technical solution of the present invention will be further described below in conjunction with the specific implementation conditions of the room air conditioning system in three modes of normal cooling operation, ultra-low temperature cooling operation, and energy saving operation.
如图2所示，当压力传感器12检测到电子膨胀阀8的上游侧压力Pd≥Pd0+ΔP时，说明此时电子膨胀阀8的上下游侧的压差足够，机房空调***进入正常的制冷运行状态，即增压循环泵5无需接入循环主路，此时第一电磁阀6和第三电磁阀10打开，第二电磁阀7和第四电磁阀11关闭，压缩机1启动正常的制冷运行，室外风机按照压力传感器12检测到的压力值Pd来调速运行。As shown in FIG. 2, when the pressure sensor 12 detects the upstream side pressure Pd ≥ Pd0 + ΔP of the electronic expansion valve 8, it is indicated that the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is sufficient, and the room air conditioning system enters the normal cooling. The operating state, that is, the boosting circulation pump 5 does not need to be connected to the circulation main road, at this time, the first electromagnetic valve 6 and the third electromagnetic valve 10 are opened, the second electromagnetic valve 7 and the fourth electromagnetic valve 11 are closed, and the compressor 1 is started normally. In the cooling operation, the outdoor fan is operated in accordance with the pressure value Pd detected by the pressure sensor 12.
如图3所示，当压力传感器12检测到电子膨胀阀8的上游侧压力Pd＜Pd0-ΔP时，说明此时电子膨胀阀8的上下游侧的压差不够，机房空调***无法进入正常的制冷运行状态，即增压循环泵5需要接入循环主路，此时第一电磁阀6、第二电磁阀7和第四电磁阀11关闭，第三电磁阀10打开，增压循环泵5和压缩机1同时开启，通过增压循环泵5提升电子膨胀阀8的上游侧的冷媒压力直至机房空调***能够在许可的范围内稳定地运行，从而实现机组在超低温环境下能够稳定可靠地运行。As shown in FIG. 3, when the pressure sensor 12 detects the upstream side pressure Pd<Pd0-ΔP of the electronic expansion valve 8, it is indicated that the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is insufficient, and the room air conditioning system cannot enter the normal state. The cooling operation state, that is, the boosting circulation pump 5 needs to be connected to the circulation main road, at which time the first electromagnetic valve 6, the second electromagnetic valve 7 and the fourth electromagnetic valve 11 are closed, the third electromagnetic valve 10 is opened, and the boosting circulation pump 5 is Simultaneously opening with the compressor 1, the refrigerant pressure on the upstream side of the electronic expansion valve 8 is raised by the boosting circulation pump 5 until the room air conditioning system can stably operate within the permissible range, thereby realizing stable and reliable operation of the unit in an ultra-low temperature environment. .
如图4所示，在机房内电子设备处于低负荷运行状态时，比如电子设备在夜晚或者其他低频使用的时间段内，由于电子设备对应的发热量降低，相应地机房对降温空调的制冷量降低，在此运行的情况下，本发明的机房空调***可以采用节能模式运行，从而降低机房PUE，节约机房运行成本，这时候需要检测室内环境温度Tn和室外环境温度Tw，当Tn-Tw≥ΔT时，则机房空调***可进入节能运行模式，此时第一电磁阀6和第三电磁阀10关闭，第二电磁阀7和第四电磁阀11打开，从而使压缩机1关闭并接出循环主路，然后增压循环泵5单独开启以提供机房空调***内的冷媒循环动力，然后利用室内外温差进行自然冷却循环制冷。其中，本领域技术人员可以在实际应用中灵活地设置上述ΔT的具体数值，只要通过ΔT的设定能够判定机房空调***是否能够进入节能运行模式即可。As shown in FIG. 4, when the electronic equipment in the equipment room is in a low-load operation state, for example, during an electronic device at night or other low-frequency use period, the cooling capacity of the cooling room air conditioner is correspondingly reduced due to the corresponding heat generation of the electronic device. Reduced, in this case, the computer room air conditioning system of the present invention can be operated in an energy-saving mode, thereby reducing the PUE of the equipment room and saving the operating cost of the equipment room. At this time, it is necessary to detect the indoor environmental temperature Tn and the outdoor environmental temperature Tw, when Tn-Tw ≥ At ΔT, the computer room air conditioning system can enter the energy-saving operation mode, at which time the first solenoid valve 6 and the third solenoid valve 10 are closed, and the second solenoid valve 7 and the fourth solenoid valve 11 are opened, so that the compressor 1 is closed and connected. The main circuit is circulated, and then the booster circulation pump 5 is separately opened to provide the refrigerant circulation power in the air conditioning system of the machine room, and then the natural cooling cycle is performed by using the indoor and outdoor temperature difference. Among them, those skilled in the art can flexibly set the specific value of the above ΔT in practical applications, as long as the setting of ΔT can determine whether the computer room air conditioning system can enter the energy-saving operation mode.
需要说明的是，在本发明中，PUE指的是Power Usage Effectiveness的简写，其是评价数据中心能源效率的指标，是数据中心消耗的所有能源与IT负载使用的能源之比，其已经成为国际上比较通行的数据中心电力使用效率的衡量指标，并且PUE值越接近于1，表示一个数据中心的绿色化程度越高。It should be noted that, in the present invention, PUE refers to the abbreviation of Power Usage Effectiveness, which is an index for evaluating data center energy efficiency, and is the ratio of all energy consumed by the data center to the energy used by the IT load, which has become an international A comparative measure of data center power usage efficiency, and the closer the PUE value is to 1, the higher the greening of a data center.
此外，还需要说明的是，前述的Pd0可以为预设压力值，ΔP为阈值，当ΔP＝0时，可以通过Pd0作为判断电子膨胀阀8的上下游侧的压差是否足够的分界点，当ΔP≠0时，可以分别通过Pd0+ΔP和Pd0-ΔP两个值来作为判断电子膨胀阀8的上下游侧的压差是否足够的分界点。也就是说，前述的设定压力阈值可以为一个值，也可以为两个值，本领域技术人员可以在实际应用中对设定压力阈值进行灵活地设置，只要通过设定压力阈值能够判断电子膨胀阀8的上下游侧的压差是否足够即可，这种设定压力阈值的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。In addition, it should be noted that the aforementioned Pd0 may be a preset pressure value, and ΔP is a threshold value. When ΔP=0, Pd0 may be used as a demarcation point for determining whether the pressure difference between the upstream and downstream sides of the electronic expansion valve 8 is sufficient. When ΔP ≠ 0, two values of Pd0 + ΔP and Pd0 - ΔP can be respectively used as a demarcation point for judging whether or not the pressure difference on the upstream and downstream sides of the electronic expansion valve 8 is sufficient. That is to say, the aforementioned set pressure threshold may be one value or two values, and those skilled in the art may flexibly set the set pressure threshold in practical applications, as long as the electronic pressure can be determined by setting the pressure threshold. Whether the pressure difference on the upstream and downstream sides of the expansion valve 8 is sufficient, and the adjustment and change of the set pressure threshold are not deviated from the principle and scope of the present invention, and should be limited to the scope of the present invention.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims (9)

  1. 一种机房空调***，所述机房空调***包括冷凝器、蒸发器、压缩机、储液器和电子膨胀阀，所述冷凝器、所述储液器、所述电子膨胀阀、所述蒸发器和所述压缩机形成闭环的循环主路，A computer room air conditioning system includes a condenser, an evaporator, a compressor, an accumulator, and an electronic expansion valve, the condenser, the accumulator, the electronic expansion valve, and the evaporator Forming a closed loop main circuit with the compressor,
    其特征在于，所述机房空调***还包括增压组件，所述增压组件能够以接入所述循环主路的方式辅助所述压缩机提升冷媒压力，以及在所述机房空调***节能运行时代替所述压缩机的功能。The air conditioning system of the computer room further includes a pressurization assembly capable of assisting the compressor to increase the refrigerant pressure in a manner of accessing the circulating main road, and when the air conditioning system of the computer room is energy-saving Instead of the function of the compressor.
  2. 根据权利要求1所述的机房空调***，其特征在于，所述增压组件包括并联设置的增压循环泵和第一电磁阀，所述增压循环泵和所述第一电磁阀共同设置在所述循环主路上，所述第一电磁阀能够控制所述增压循环泵选择性地接入所述循环主路。The equipment room air conditioning system according to claim 1, wherein the pressurization assembly comprises a booster circulation pump and a first solenoid valve arranged in parallel, and the booster circulation pump and the first solenoid valve are disposed together The first solenoid valve can control the booster circulation pump to selectively access the circulation main path.
  3. 根据权利要求2所述的机房空调***，其特征在于，所述电子膨胀阀的上游侧设置有压力传感器，所述压力传感器用于检测所述电子膨胀阀的上游侧压力。The equipment room air conditioning system according to claim 2, wherein a pressure sensor is disposed on an upstream side of the electronic expansion valve, and the pressure sensor is configured to detect an upstream side pressure of the electronic expansion valve.
  4. 根据权利要求3所述的机房空调***，其特征在于，在所述电子膨胀阀的上游侧压力小于设定压力阈值的情形下，所述增压循环泵接入所述循环主路。The equipment room air conditioning system according to claim 3, wherein the booster circulation pump is connected to the circulation main path in a case where the upstream side pressure of the electronic expansion valve is less than a set pressure threshold.
  5. 根据权利要求4所述的机房空调***，其特征在于，在所述电子膨胀阀的上游侧压力大于或等于所述设定压力阈值的情形下，所述增压循环泵不接入所述循环主路。The equipment room air conditioning system according to claim 4, wherein the booster circulation pump does not access the cycle if the upstream side pressure of the electronic expansion valve is greater than or equal to the set pressure threshold main road.
  6. 根据权利要求1所述的机房空调***，其特征在于，所述循环主路上设置有与所述电子膨胀阀并联设置的第二电磁阀，所述第二电磁阀能够控制所述电子膨胀阀选择性地接入所述循环主路。The equipment room air conditioning system according to claim 1, wherein the circulating main road is provided with a second electromagnetic valve disposed in parallel with the electronic expansion valve, and the second electromagnetic valve is capable of controlling the electronic expansion valve selection The loop main path is accessed sexually.
  7. 根据权利要求1所述的机房空调***，其特征在于，所述循环主 路上设置有第三电磁阀和第四电磁阀，所述第三电磁阀与所述压缩机串联设置并共同与所述第四电磁阀并联设置。The equipment room air conditioning system according to claim 1, wherein the circulation main road is provided with a third electromagnetic valve and a fourth electromagnetic valve, and the third electromagnetic valve is disposed in series with the compressor and is common to the The fourth solenoid valves are arranged in parallel.
  8. 根据权利要求1至7中任一项所述的机房空调***，其特征在于，所述增压组件设置在所述储液器与所述电子膨胀阀之间。The computer room air conditioning system according to any one of claims 1 to 7, wherein the pressurizing assembly is disposed between the accumulator and the electronic expansion valve.
  9. 根据权利要求1至7中任一项所述的机房空调***，其特征在于，所述增压组件设置在所述冷凝器与所述储液器之间。The computer room air conditioning system according to any one of claims 1 to 7, wherein the pressurizing assembly is disposed between the condenser and the accumulator.
PCT/CN2019/073159 2018-05-09 2019-01-25 Server room air conditioning system WO2019214297A1 (en)

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