CN108633225B - Air conditioning system for machine room - Google Patents
Air conditioning system for machine room Download PDFInfo
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- CN108633225B CN108633225B CN201810438188.6A CN201810438188A CN108633225B CN 108633225 B CN108633225 B CN 108633225B CN 201810438188 A CN201810438188 A CN 201810438188A CN 108633225 B CN108633225 B CN 108633225B
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- machine room
- air conditioning
- conditioning system
- room air
- electromagnetic valve
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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
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- 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
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- 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
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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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- 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
Abstract
The invention belongs to the technical field of machine room air conditioners and aims to solve the problems that the normal operation of an existing machine room air conditioning system cannot be guaranteed in an ultralow temperature environment and the installation and the arrangement of the machine room air conditioning system are inconvenient. Therefore, the invention provides a machine room air conditioning system which comprises a condenser, an evaporator, a compressor, a liquid storage device and an electronic expansion valve, wherein the condenser, the liquid storage device, the electronic expansion valve, the evaporator and the compressor form a closed loop main circulation path, the machine room air conditioning system also comprises a pressurizing assembly, and the pressurizing assembly can assist the compressor to lift the pressure of a refrigerant in a mode of being connected into the main circulation path and has the function of replacing the compressor when the machine room air conditioning system is in energy-saving operation. The invention enables the machine room air conditioning system to work normally in the ultralow temperature environment, and can improve the length of the piping of the machine room air conditioning system and widen the height drop limit to a certain extent, thereby enabling the machine room air conditioning system to meet the installation requirements of various building forms.
Description
Technical Field
The invention belongs to the technical field of machine room air conditioners, and particularly provides a machine room air conditioning system.
Background
With the rapid development of the economy of the internet, a plurality of network electronic rooms are built. Electronic equipment in the computer lab runs through the year, can give out a large amount of heats, correspondingly needs computer lab air conditioning system to cool down to electronic equipment in the electronic computer lab, needs computer lab air conditioning system to refrigerate the operation all the year promptly. Under the condition that the outdoor temperature is lower in winter, faults such as alarm and the like often exist in the machine room air conditioning system when the machine room air conditioning system operates in a refrigerating mode due to lower condensing pressure, and therefore the machine set cannot operate normally. In order to meet the normal cooling requirement of electronic equipment in a machine room, very strict requirements are provided for annual refrigeration operation of air-conditioning products of the machine room, particularly for safe and reliable refrigeration operation in a low-temperature environment or an ultralow-temperature environment.
In the prior art, the condensing pressure of the low-temperature environment air conditioning system is usually increased by reducing the rotating speed of the outdoor fan. That is, the rotation speed of the outdoor unit fan is generally adjusted by detecting the pressure or temperature signal value of the outdoor unit condenser, so that the condensing pressure of the air conditioning system is maintained near the set value to perform the cooling operation. However, the scheme of adapting to the outdoor low-temperature environment for low-temperature refrigeration by adjusting the rotating speed of the outdoor fan has certain requirements on the application range of the outdoor environment temperature, and a great deal of engineering experience shows that the scheme of reducing the wind speed generally only can meet the stable operation of the air conditioning system under the condition of more than-15 ℃, and when the environment temperature is continuously reduced, the scheme is difficult to ensure the normal operation of the air conditioning system. For example, in the north areas such as northeast and inner Mongolia of China, the ultralow temperature environment of about minus 30 ℃ in winter is very common, so the scheme of reducing the wind speed cannot guarantee the refrigerating requirement of the machine room in the area in winter. In addition, most machine rooms and conventional office areas are in the same building, and due to the fact that the air conditioning equipment is large in size, an outdoor heat dissipation condenser is generally placed on the ground or the top of the building during arrangement, certain pipe length and height difference exist between corresponding internal and external units, and due to the fact that pipeline resistance loss and difference loss exist, the pipe length and difference allowed by a unit sometimes cannot well meet the actual engineering requirements.
Therefore, there is a need in the art for a new air conditioning system for a room to solve the above problems.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problems that the conventional machine room air conditioning system cannot guarantee the normal operation of the machine room air conditioning system in an ultralow temperature environment and is inconvenient to install and arrange the machine room air conditioning system, the invention provides the machine room air conditioning system which comprises a condenser, an evaporator, a compressor, a liquid storage device and an electronic expansion valve, wherein the condenser, the liquid storage device, the electronic expansion valve, the evaporator and the compressor form a closed loop main circulation path, the machine room air conditioning system also comprises a pressurizing assembly, and the pressurizing assembly can assist the compressor to increase the pressure of a refrigerant in a mode of being connected into the main circulation path and replace the compressor when the machine room air conditioning system is in energy-saving operation.
In the above-mentioned computer lab air conditioning system's preferred technical scheme, pressure boost subassembly includes pressure boost circulating pump and the first solenoid valve of parallel arrangement, and pressure boost circulating pump and first solenoid valve set up on the circulation main road jointly, and first solenoid valve can control pressure boost circulating pump and selectively insert the circulation main road.
In a preferred embodiment of the air conditioning system in the machine room, a pressure sensor is disposed on an upstream side of the electronic expansion valve, and the pressure sensor is configured to detect an upstream pressure of the electronic expansion valve.
In a preferred embodiment of the air conditioning system in the machine room, the pressure of the pressure on the upstream side of the electronic expansion valve is lower than a set pressure threshold, and the pressure boost circulation pump is connected to the main circulation path.
In the above-mentioned preferred technical solution of the air conditioning system of the machine room, the pressure of the pressure at the upstream side of the electronic expansion valve is not connected to the main circulation path when the pressure is greater than or equal to the set pressure threshold.
In the above preferred technical solution of the air conditioning system in the machine room, the main circulation path is provided with a second solenoid valve connected in parallel with the electronic expansion valve, and the second solenoid valve can control the electronic expansion valve to selectively access the main circulation path.
In the preferable technical scheme of the air conditioning system in the machine room, the circulation main path is provided with a third electromagnetic valve and a fourth electromagnetic valve, and the third electromagnetic valve is connected with the compressor in series and is connected with the fourth electromagnetic valve in parallel.
In the preferable technical scheme of the air conditioning system of the machine room, the pressurization assembly is arranged between the liquid storage device and the electronic expansion valve.
In the preferable technical scheme of the air conditioning system of the machine room, the pressurizing assembly is arranged between the condenser and the liquid storage device.
As can be understood by those skilled in the art, in the preferred technical scheme of the present invention, the compressor can be assisted by the pressure increasing assembly to further increase the pressure of the refrigerant, so that compensation can be performed by the pressure increasing assembly if the pressure of the refrigerant cannot be ensured by the compressor alone under an ultra-low temperature condition, thereby ensuring normal operation of the air conditioning system of the machine room, that is, ensuring that the air conditioning system of the machine room can continuously perform cooling operation, so that the electronic equipment in the machine room always operates at a proper ambient temperature, and thus the air conditioning system of the machine room can always stably and reliably operate. In addition, when electronic equipment in the machine room carries out low-load operation, because the calorific capacity of electronic equipment itself is less, can close the compressor, only maintain machine room air conditioning system's normal operating through pressure boost subassembly to utilize indoor outer difference in temperature to carry out natural cooling circulation refrigeration, and then make machine room air conditioning system can energy-conserving operation, reduce the PUE index of machine room effectively, reduce machine room running cost. Meanwhile, the machine room air conditioning system can improve the adaptability of the machine room air conditioning system, so that the machine room air conditioning system can adapt to more occasions, for example, the length of the piping of the machine room air conditioning system can be improved to a certain extent, and the height drop limit of the machine room air conditioning system can be widened, so that the machine room air conditioning system can meet the installation requirements of various building forms.
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 side and the downstream side of the electronic expansion valve can be indirectly obtained, the machine room air conditioning system can directly perform normal refrigeration operation under the condition that the pressure difference is large (specifically, the upstream side pressure of the electronic expansion valve is greater than or equal to a set pressure threshold), and the machine room air conditioning system cannot perform normal refrigeration operation under the condition that the pressure difference is small (specifically, the upstream side pressure of the electronic expansion valve is smaller than the set pressure threshold), at the moment, the refrigerant pressure on the upstream side of the electronic expansion valve needs to be increased, so that the pressure difference between the upstream side and the downstream side of the electronic expansion valve is increased, and the normal refrigeration operation of the machine room air conditioning system is ensured. Through such setting, through setting for pressure threshold value's setting, can make computer lab air conditioning system no matter be at low temperature environment or all can normally work under the ultra-low temperature environment, further improve computer lab air conditioning system's operational reliability, guarantee that the electronic equipment in the computer lab can operate under the most suitable temperature environment all the time.
Furthermore, the third electromagnetic valve and the fourth electromagnetic valve can flexibly switch the machine room air conditioning system between a conventional refrigeration mode (including a low-temperature refrigeration operation mode and an ultra-low-temperature refrigeration operation mode) and an energy-saving mode, so that the flexibility of controlling the machine room air conditioning system is improved, and the machine room air conditioning system can stably and reliably operate.
Drawings
Fig. 1 is a schematic structural view of a machine room air conditioning system of the present invention;
fig. 2 is a schematic structural diagram of the air conditioning system of the machine room of the present invention in a normal cooling operation mode;
fig. 3 is a schematic structural view of the air conditioning system of the machine room of the present invention in an ultra-low temperature cooling operation mode;
fig. 4 is a schematic structural diagram of the air conditioning system of the machine room of the present invention in an energy saving operation mode.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, 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.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Based on the problems that the prior machine room air conditioning system cannot ensure the normal operation of the prior machine room air conditioning system under the ultralow temperature environment and is inconvenient for the installation and the arrangement of the machine room air conditioning system, the invention provides the machine room air conditioning system, aiming at ensuring that the machine room air conditioning system can normally work under the low temperature environment or the ultralow temperature environment, and improving the piping length of the machine room air conditioning system and widening the height drop limit to a certain extent, so that the machine room air conditioning system can meet the installation requirements of various building forms.
Specifically, as shown in fig. 1, the air conditioning system of the machine room of the present invention includes a compressor 1, a condenser 3, a reservoir 4, an electronic expansion valve 8 and an evaporator 9, the condenser 3, the reservoir 4, the electronic expansion valve 8, the evaporator 9 and the compressor 1 form a closed loop main circulation path, a one-way valve 2 is disposed on the downstream side of the compressor 1, and the pressure boost assembly of the present invention can assist the compressor 1 to boost the pressure of the refrigerant in a manner of being connected to the main circulation path, and can replace the function of the compressor 1 when the air conditioning system of the machine room is in energy-saving operation. Wherein, pressure boost subassembly can adopt pressure boost circulating pump 5 and solenoid valve matched with structure, also perhaps adopts the structure of booster, again or adopt other pressure boost structures, and the technical personnel in the field can set up pressure boost subassembly's concrete structure in practical application in a flexible way, as long as can be with the mode that inserts the main road of circulation auxiliary compressor 1 through pressure boost subassembly and promote refrigerant pressure to and replace compressor 1's function when the energy-conserving operation of machine room air conditioning system can. In addition, the pressurizing assembly can be arranged between the liquid storage device 4 and the electronic expansion valve 8, and can also be arranged between the condenser 3 and the liquid storage device 4, and a person skilled in the art can flexibly set the specific setting position of the pressurizing assembly in practical application, as long as the pressure of the refrigerant can be increased through the pressurizing assembly, and the function of the compressor 1 can be replaced when the machine room air conditioning system is in energy-saving operation.
Preferably, the supercharging assembly comprises a supercharging circulating pump 5 and a first electromagnetic valve 6 which are arranged in parallel, the supercharging circulating pump 5 and the first electromagnetic valve 6 are arranged on the circulating main path together, and the first electromagnetic valve 6 can control the supercharging circulating pump 5 to be selectively connected into the circulating main path. As shown in fig. 1, when the first electromagnetic valve 6 is opened, the pressure boost circulation pump 5 cannot be connected to the main circulation path, the first electromagnetic valve 6 is closed, and the pressure boost circulation pump 5 is connected to the main circulation path.
Preferably, the root cause of the low-pressure or other alarm failure of the low-temperature refrigeration system to cause the abnormal operation of the air conditioning system in the machine room is that the pressure difference between the upstream side and the downstream side of the electronic expansion valve 8 is insufficient, that is, the pressure difference is caused by the abnormal throttling circulation of the refrigerant in the air conditioning system in the machine room, therefore, the upstream side of the electronic expansion valve 8 is provided with a pressure sensor 12, and the pressure sensor 12 is used for detecting the upstream side pressure of the electronic expansion valve 8. The pressure sensor 12 can detect the upstream side pressure of the electronic expansion valve 8, so as to indirectly judge the pressure difference between the upstream side and the downstream side of the electronic expansion valve 8, and the booster circulating pump 5 is connected to the main circulating path under the condition that the upstream side pressure of the electronic expansion valve 8 is less than the set pressure threshold value; when the upstream pressure of the electronic expansion valve 8 is greater than or equal to the set pressure threshold, the booster circulation pump 5 is not connected to the main circulation path.
Further preferably, a second solenoid valve 7 is disposed on the main circulation path in parallel with the electronic expansion valve 8, and the second solenoid valve 7 can control the electronic expansion valve 8 to selectively switch in the main circulation path. As shown in fig. 1, the electronic expansion valve 8 and the pressure sensor 12 are arranged in series and are connected in parallel with the second solenoid valve 7, when the second solenoid valve 7 is opened, the electronic expansion valve 8 is not connected to the main circulation path, and when the second solenoid valve 7 is closed, the electronic expansion valve 8 is connected to the main circulation path.
Further preferably, a third solenoid valve 10 and a fourth solenoid valve 11 are provided on the circulation main path, and the third solenoid valve 10 is provided in series with the compressor 1 and is provided in parallel with the fourth solenoid valve 11. As shown in fig. 1, when the third solenoid valve 10 is open and the fourth solenoid valve 11 is closed, the compressor 1 is switched into the main circuit of the cycle; when the third solenoid valve 10 is closed and the fourth solenoid valve 11 is open, the compressor 1 is taken out of the main circuit of the cycle.
The technical scheme of the invention is further explained by combining the specific implementation working conditions of the machine room air conditioning system under three modes of normal refrigeration operation, ultralow temperature refrigeration operation and energy-saving operation.
As shown in fig. 2, when the pressure sensor 12 detects that the pressure Pd at the upstream side of the electronic expansion valve 8 is greater than or equal to Pd0+ Δ P, it indicates that the pressure difference between the upstream side and the downstream side of the electronic expansion valve 8 is sufficient, the air conditioning system in the machine room enters a normal cooling operation state, i.e. the booster circulation pump 5 does not need to be connected to the main circulation path, 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, the compressor 1 starts a normal cooling operation, and the outdoor fan operates at a speed-controlled speed according to the pressure value Pd detected by the pressure sensor 12.
As shown in fig. 3, when the pressure sensor 12 detects that the upstream side pressure Pd of the electronic expansion valve 8 is less than Pd0- Δ P, it indicates that the pressure difference between the upstream side and the downstream side of the electronic expansion valve 8 is insufficient, the machine room air conditioning system cannot enter a normal cooling operation state, that is, the booster circulation pump 5 needs to be connected to the main circulation path, at this 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, the booster circulation pump 5 and the compressor 1 are simultaneously opened, and the refrigerant pressure on the upstream side of the electronic expansion valve 8 is raised by the booster circulation pump 5 until the machine room air conditioning system can stably operate within an allowable range, so that the unit can stably and reliably operate in an ultra-low temperature environment.
As shown in fig. 4, when the electronic device in the machine room is in a low-load operation state, for example, when the electronic device is in a night or other low-frequency use time period, the heating value corresponding to the electronic device is reduced, and accordingly the cooling capacity of the machine room for cooling the air conditioner is reduced, under the condition of the operation, the air conditioning system of the machine room of the present invention can operate in an energy-saving mode, so as to reduce the PUE of the machine room and save the operation cost of the machine room, at this time, the indoor ambient temperature Tn and the outdoor ambient temperature Tw need to be detected, when Tn-Tw is greater than or equal to Δ T, the air conditioning system of the machine room can enter the energy-saving operation mode, at this time, the first electromagnetic valve 6 and the third electromagnetic valve 10 are closed, the second electromagnetic valve 7 and the fourth electromagnetic valve 11 are opened, so as to close the compressor 1 and exit the circulation main path, and then the booster circulation pump 5 is independently opened to provide the refrigerant circulation power in the air conditioning system of the machine room, then natural cooling circulation refrigeration is carried out by utilizing the indoor and outdoor temperature difference. In practical application, a person skilled in the art can flexibly set the specific value of Δ T, and only needs to determine whether the machine room air conditioning system can enter the energy-saving operation mode through setting Δ T.
In the present invention, PUE is a short hand for Power Usage efficiency, which is an index for evaluating energy efficiency of a data center, is a ratio of all energy consumed by the data center to energy used by IT loads, and has become a measure for internationally comparing Power Usage efficiency of the popular data center, and the PUE value is closer to 1, which indicates that the degree of greening of a data center is higher.
It should be noted that the Pd0 may be a preset pressure value, Δ P may be a threshold value, and when Δ P is equal to 0, Pd0 may be used as a boundary point for determining whether the differential pressure on the upstream and downstream sides of the electronic expansion valve 8 is sufficient, and when Δ P is not equal to 0, two values, Pd0+ Δ P and Pd0- Δ P, may be used as a boundary point for determining whether the differential pressure on the upstream and downstream sides of the electronic expansion valve 8 is sufficient. That is, the set pressure threshold may be a single value or two values, and those skilled in the art can flexibly set the set pressure threshold in practical applications as long as whether the pressure difference between the upstream side and the downstream side of the electronic expansion valve 8 is sufficient can be determined by the set pressure threshold, and the adjustment and the change of the set pressure threshold are not departing from the principle and the scope of the present invention, and should be limited within the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (3)
1. A machine room air conditioning system comprises a condenser, an evaporator, a compressor, a liquid storage device and an electronic expansion valve, wherein the condenser, the liquid storage device, the electronic expansion valve, the evaporator and the compressor form a closed loop circulation main path,
it is characterized in that the machine room air conditioning system also comprises a supercharging component which can assist the compressor to lift the pressure of the refrigerant in a mode of connecting into the circulating main path and replace the function of the compressor when the machine room air conditioning system operates in an energy-saving mode,
the supercharging component comprises a supercharging circulating pump and a first electromagnetic valve which are arranged in parallel, the supercharging circulating pump and the first electromagnetic valve are arranged on the circulating main path together, the first electromagnetic valve can control the supercharging circulating pump to be selectively connected into the circulating main path,
the upstream side of the electronic expansion valve is provided with a pressure sensor which is used for detecting the upstream side pressure of the electronic expansion valve,
the main circulation path is provided with a second electromagnetic valve which is arranged in parallel with the electronic expansion valve and can control the electronic expansion valve to be selectively connected into the main circulation path,
a third electromagnetic valve and a fourth electromagnetic valve are arranged on the circulation main path, the third electromagnetic valve and the compressor are arranged in series and are jointly arranged in parallel with the fourth electromagnetic valve,
when the pressure sensor detects that the upstream pressure Pd of the electronic expansion valve is more than or equal to Pd0+ delta P, the first electromagnetic valve and the third electromagnetic valve are opened, and the second electromagnetic valve and the fourth electromagnetic valve are closed, so that the booster circulating pump is connected out of the main circulating path and the compressor is connected into the main circulating path,
when the pressure sensor detects that the upstream pressure Pd < Pd 0-delta P of the electronic expansion valve, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are closed, and the third electromagnetic valve is opened, so that the booster circulating pump and the compressor are simultaneously connected to the main circulating circuit, and the machine room air conditioning system can normally perform cooling operation in an ultralow temperature environment of about-30 ℃.
2. The machine room air conditioning system of claim 1, wherein the plenum assembly is disposed between the reservoir and the electronic expansion valve.
3. The machine room air conditioning system of claim 1, wherein the pressure boost assembly is disposed between the condenser and the accumulator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810438188.6A CN108633225B (en) | 2018-05-09 | 2018-05-09 | Air conditioning system for machine room |
| PCT/CN2019/073159 WO2019214297A1 (en) | 2018-05-09 | 2019-01-25 | Server room air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810438188.6A CN108633225B (en) | 2018-05-09 | 2018-05-09 | Air conditioning system for machine room |
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| CN108633225A CN108633225A (en) | 2018-10-09 |
| CN108633225B true CN108633225B (en) | 2021-11-26 |
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| CN201810438188.6A Active CN108633225B (en) | 2018-05-09 | 2018-05-09 | Air conditioning system for machine room |
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| WO (1) | WO2019214297A1 (en) |
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| CN108633225B (en) * | 2018-05-09 | 2021-11-26 | 青岛海尔空调电子有限公司 | Air conditioning system for machine room |
| CN113757958B (en) * | 2020-06-04 | 2022-12-27 | 维谛技术有限公司 | Control method and device of air conditioning system |
| CN114576875A (en) * | 2021-12-01 | 2022-06-03 | 祥博传热科技股份有限公司 | Low-energy-consumption intelligent temperature-sensing cooling system |
| CN114680360B (en) * | 2022-03-04 | 2023-06-16 | 青岛海尔空调电子有限公司 | Drying system for tobacco and control method for tobacco |
| CN115096012A (en) * | 2022-06-28 | 2022-09-23 | 鹏鸟科技(山东)有限公司 | Refrigerating system with gas-liquid relay |
| CN115623764B (en) * | 2022-12-19 | 2023-03-21 | 浙江德塔森特数据技术有限公司 | AI and data flow-based data center equipment operation abnormity analysis method |
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| CN204373249U (en) * | 2014-12-26 | 2015-06-03 | 艾默生网络能源有限公司 | A kind of refrigeration control system and a kind of air-conditioning |
| JP2017134677A (en) * | 2016-01-28 | 2017-08-03 | 株式会社Ｎｔｔファシリティーズ | Computer room air conditioning system |
| CN106642773A (en) * | 2016-12-12 | 2017-05-10 | 珠海格力电器股份有限公司 | Air conditioning system and the controlling method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108633225A (en) | 2018-10-09 |
| WO2019214297A1 (en) | 2019-11-14 |
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