CN108548352A - A kind of computer-room air conditioning system and its control method - Google Patents
A kind of computer-room air conditioning system and its control method Download PDFInfo
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- CN108548352A CN108548352A CN201810358941.0A CN201810358941A CN108548352A CN 108548352 A CN108548352 A CN 108548352A CN 201810358941 A CN201810358941 A CN 201810358941A CN 108548352 A CN108548352 A CN 108548352A
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- fluorine
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- temperature
- demand
- fluorine pump
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Classifications
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of computer-room air conditioning system and its control methods, system includes outer machine and interior machine, outer machine is connected with interior machine, the inlet/outlet pipe road of the condenser of outer machine is connected with temperature sensor and pressure sensor, temperature sensor is installed on inlet pipeline and outlet pipeline, the inlet/outlet pipe road of fluorine pump is connected with temperature sensor pressure sensor, it is connected with bypass line on the export pipeline of the fluorine pump, the other end of bypass line is connected in the inlet ductwork of condenser, bypass solenoid valve is connected on bypass line, it is connected with temperature sensor and pressure sensor in the inlet ductwork of interior machine electric expansion valve, it is connected with temperature sensor and pressure sensor on the export pipeline of the evaporator, the evaporator is also equipped with air return temperature humidity sensor and outlet air Temperature Humidity Sensor.Control method includes interior machine and outer machine control method.The present invention is safe and reliable, stablizes, and disclosure satisfy that the requirement of air conditioner in machine room.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of air conditioner in machine room and its control methods.
Background technology
With the pith that the high speed development of data center, air conditioner in machine room are controlled as data center environment, safety
Property, reliability, stability are increasingly taken seriously.
Safe and reliable, the stabilization of air conditioner in machine room are mainly reflected in the following aspects：
1, demand of the data center machine room to constant humiture, it is desirable to which air conditioner in machine room can adjust energy output in time, keep
The humiture that data center machine room is stablized.
2, data center machine room whole day runs without interruption for 24 hours, it is desirable to which air conditioner in machine room can realize long-term uninterrupted fortune
It goes and there is high reliability, be less prone to failure.
3, data center machine room does not allow the appliance devices such as server the case where condensation occur, therefore blows to air conditioner in machine room
Humiture has strict demand.
4, using a variety of low-temperature receivers, such as the chilled water of building central air-conditioning, natural cooling source.
5, water does not enter in data center machine room as possible.It avoids that water leakage occurs, jeopardizes the safety of computer room inner electronic equipment.
Therefore it provides a kind of air conditioner in machine room disclosure satisfy that above-mentioned requirements very it is necessary to.
Invention content
In order to meet the above-mentioned requirements of air conditioner in machine room, the present invention provides a kind of computer-room air conditioning system, the air-conditioning systems
Unite it is safe and reliable, stablize, disclosure satisfy that the requirement of air conditioner in machine room.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of computer-room air conditioning system, including outer machine and interior machine, outer machine are connected with interior machine, and outer machine includes condenser and fluorine pump, interior machine
Including evaporator and electric expansion valve, the outlet of condenser is connected with the import that fluorine pumps, the outlet of fluorine pump and electric expansion valve
Import is connected, and the outlet of electric expansion valve is connected with the import of evaporator, and the outlet of evaporator is connected with the import of condenser,
It is characterized in that：Temperature sensor T1 and pressure sensor PS1, the condenser are connected in the inlet ductwork of the condenser
Export pipeline on be connected with temperature sensor T2, temperature sensor T5 on the inlet pipeline of the condenser, the condenser
Outlet pipeline on be connected with temperature sensor T6 and electric two-way valve, be connected with temperature sensing in the inlet ductwork of the fluorine pump
Device T3 and pressure sensor PS2 is connected with temperature sensor T4 and pressure sensor PS3, institute on the export pipeline of the fluorine pump
State and be connected with bypass line on the pipeline that is connected with electric expansion valve of fluorine pump, the other end of bypass line be connected to condenser into
On mouth pipeline, it is connected with bypass solenoid valve on bypass line, temperature sensing is connected in the inlet ductwork of the electric expansion valve
Device T7 and pressure sensor PS4 is connected with temperature sensor T8 and pressure sensor PS5 on the export pipeline of the evaporator,
The evaporator is also equipped with air return temperature humidity sensor and outlet air Temperature Humidity Sensor.
It is also parallel with branch line on the pipeline that the condenser is connected with fluorine pump, liquid storage device is connected on branch line,
The inlet and outlet of liquid storage device is respectively connected with ball valve, and ball valve, liquid storage device connection are equipped on the pipeline that condenser is connected with fluorine pump
There is liquid-level switch.
The fluorine pump has two, two fluorine parallels connection of pumps.
The inlet and outlet of two fluorine pump is respectively connected with ball valve, and the outlet of two fluorine pump is respectively connected with check valve.
It is also equipped with device for drying and filtering, fluid path solenoid valve and ball valve on the pipeline that the fluorine pump is connected with electric expansion valve,
It is also connected with ball valve on the pipeline that the evaporator is connected with condenser.
Liquid-sighting glass is installed on the export pipeline and inlet ductwork of the device for drying and filtering.
The condenser is the water-cooled condensers such as plate heat exchanger, tube-in-tube condenser, shell and tube condenser.
The present invention also provides the control method of above-mentioned air-conditioning system, including interior machine control method and outer machine control method,
Interior machine control method includes interior machine start-up control method and electronic expansion valve opening control method, and outer machine control method includes outer machine
Start-up control method, electric two-way valve aperture control method, bypass solenoid valve control method, fluorine pump method for handover control, liquid level
Method of controlling switch, condenser inflow temperature control method.
The interior machine start-up control method is specially：
When：When detected value ＞ setting values+dead zone, refrigeration demand=((detected value-setting value-dead zone)/precision) *
100%；
When：When setting value-dead zone≤detected value≤setting value+dead zone, refrigeration demand=0；
When：Detected value<When setting value-dead zone, refrigeration demand=((detected value-setting value+dead zone)/precision) * 100%；
Interior machine booting operation, refrigeration demand ＜ -100%, interior machine are out of service when the refrigeration demand ＞ 0；When interior machine is switched on
After operation, only refrigeration demand ＜ -100% can just stop, after interior machine is out of service, the interior machine just meeting of when only refrigeration demand ＞ 0
Booting operation.
The detected value is the detected value of evaporator return air temperature, that is, the value that air return temperature humidity sensor detects,
The setting value is the setting value of evaporator return air temperature, and user can be configured according to actual conditions, and setting value is
28 DEG C -40 DEG C are defaulted as 35 DEG C, and the dead zone is dead zone temperature, and setting value is 0.5 DEG C -2 DEG C, and default value is 1 DEG C.Institute
The required precision that precision refers to evaporator return air temperature is stated, user oneself can be arranged, and setting value is 1 DEG C -10 DEG C, acquiescence
Value is 1 DEG C
The electronic expansion valve opening control method is specially：
When：Leaving air temp detected value>When leaving air temp setting value+dead zone, demand=((leaving air temp detected value-outlet air
Desired temperature-dead zone)/precision) * 100%；
When：When leaving air temp setting value-dead zone≤leaving air temp detected value≤leaving air temp setting value+dead zone, demand
=0；
When：Leaving air temp detected value<When leaving air temp setting value-dead zone, demand=((leaving air temp detected value-outlet air
Desired temperature+dead zone)/precision) * 100%；
When demand≤0%, electric expansion valve minimum aperture；
When demand >=100%, electric expansion valve maximum opening；
When 0%≤demand≤100%, electronic expansion valve opening is directly proportional to demand；
The leaving air temp detected value is the detected value of evaporator leaving air temp, that is, outlet air Temperature Humidity Sensor detects
Value, the leaving air temp setting value are the setting value of evaporator leaving air temp, which is 17-28 DEG C, is defaulted as 24 DEG C, institute
It is dead zone temperature to state dead zone, and the dead zone is dead zone temperature, and setting value is 0.5 DEG C -2 DEG C, and default value is 1 DEG C.The precision refers to
Be evaporator leaving air temp required precision, user can oneself setting, setting value be 1 DEG C -10 DEG C, be defaulted as 1 DEG C.
The degree of superheat of the electric expansion valve is 0.5-1K, default value 0.5K.
The evaporation fan of evaporator controls：Evaporation fan is EC wind turbines, and EC wind turbines have " constant speed mode " and " temperature difference is average "
Optional, specific model selection adjusts operation according to dead zone and precision,
The outer machine start-up control method is specially：Booting, unit are in standby, and electric two-way valve is in minimum aperture,
Machine in detection, when interior machine has refrigeration demand（There is the fluid path solenoid valve of interior machine to open）, fluorine pump is opened, when the fluid path electromagnetism of interior machine
Valve Close All, fluorine pump is out of service, and electric two-way valve is in minimum aperture.
The electric two-way valve aperture control method is specially：
When：Electric two-way valve keeps minimum aperture, the Ta to give tacit consent to 12 DEG C when temperature sensor T2≤Ta, and 10 DEG C to 20 DEG C can
If 0.1 DEG C of indexing, the Omin is defaulted as 20%, and 10% to 50% can set, indexing 1%.
When：When temperature sensor T2 >=Tb（Tb>Ta）, electric two-way valve keeps maximum opening Omax operation, the Tb silent
Recognize 14 DEG C, 10 DEG C to 20 DEG C can set, and index 0.1 DEG C, the Omax acquiescences 100%, 60% to 100% can set, indexing 1%.
When：When Ta ＜ T2 ＜ Tb, electric two-way valve carries out PID control adjusting, the PID by Omin to Omax according to demand
The algorithm of control and regulation is：Parameter P is set by system between 50-200；Parameter I is set by user between 100-210, ginseng
Number D is set by user between 0-100；
Error current：Current_err=set temperature value Ta-current temperature value T2；
Last error：last_err=prev_err（Upper last time error）；
Upper last time error：prev_err=current_err；
Demand Request=P * (current_err-prev_err)+I * current_err+D* (
Current_err -2*prev_err+last_err),
As demand Request ＞ 0, no electric two-way valve aperture demand, electric two-way valve maintains minimum aperture Omin.
As demand Request ＜ 0,
Two-way valve opening O=| Request | 100+Omin of ÷；（Omin ＜ O ＜ Omax）
The bypass solenoid valve control method is specially：
Fluorine pump inlet pressure P2（Unit：bar）Fluorine pump discharge pressure P3（Unit：bar）, give tacit consent to bypass solenoid valve ON pressure
5.5bar, as P3- P2=5.5bar, bypass solenoid valve is opened（Range can be arranged in bypass solenoid valve ON pressure：2-8bar, point
Degree=0.1bar）；
Acquiescence bypass solenoid valve OFF pressure is 4.5bar, as P3-P2=4.5bar, and ON pressure>When OFF pressure, electromagnetism is bypassed
Valve is closed（Range can be arranged in bypass solenoid valve OFF pressure：2-8bar, indexing=0.1bar,）.
Fluorine pumps method for handover control：
One fluorine pump operation time reaches 720h（1h to 3000h can be set, indexing：1h, default value：720h）, switch to another fluorine
Pump operation；
In fluorine pump operation, fluorine pump discharge, import pressure difference need to be detected：P3-P2；P3-P2≤1.2bar,（0 to 5bar can set, point
Degree：0.1bar, default value：1.2bar）；Duration 60s,（0 to 600s can set, indexing：1s, default value 60s）, switching fluorine pump
Operation, and outputting alarm：" a few # fluorine failure of pump "；
When being switched to another fluorine pump operation, delay 60s detection fluorine pumps inlet outlet pressure differential（Delay time 0 can be set to 600s, be divided
Degree：1s, default value 60s）；
It is not released in " 1# fluorine failure of pump " and " 2# fluorine failure of pump ", maintains current fluorine pump operation, a fluorine failure of pump can
It automatically terminates, two fluorine failure of pump can only release manually, release alert if：Fluorine pump discharge and import pressure difference：P3-P2≥
2bar；Because of fluorine pump discharge and import pressure difference：Fluorine failure of pump caused by P3-P2≤1.2bar, fluorine pump are not shut down；When fluorine pump switching,
The fluorine pump of operation is out of service, is delayed after 5s, starts other fluorine pump.
Liquid-level switch control method is specially：
In fluorine pump operation, float liquid level switch is connected, the duration：30s, alarm：" lack of refrigerant ".But it does not shut down.
Condenser inflow temperature control method is specially：
In fluorine pump operation, condenser water inlet water temperature T 5, T5 >=15 DEG C need to be detected（12 DEG C to 25 DEG C can set, indexing：It 0.1 DEG C, writes from memory
Recognize 15 DEG C of value）, alarm：" inflow temperature is excessively high ", but do not shut down.
Compared with prior art, the invention has the advantages that：
1, temperature sensor T1 and pressure sensor PS1 are connected in the inlet ductwork of condenser of the present invention, the condenser
It is connected with temperature sensor T2 on export pipeline, temperature sensor T5 on the inlet pipeline of the condenser, the condenser
It is connected with temperature sensor T6 and electric two-way valve on outlet pipeline, temperature sensor is connected in the inlet ductwork of the fluorine pump
T3 and pressure sensor PS2 is connected with temperature sensor T4 and pressure sensor PS3 on the export pipeline of the fluorine pump, described
It is connected with bypass line on the pipeline that fluorine pump is connected with electric expansion valve, the other end of bypass line is connected to the import of condenser
On pipeline, it is connected with bypass solenoid valve on bypass line, temperature sensor is connected in the inlet ductwork of the electric expansion valve
T7 and pressure sensor PS4 is connected with temperature sensor T8 and pressure sensor PS5, institute on the export pipeline of the evaporator
It states evaporator and is also equipped with air return temperature humidity sensor and outlet air Temperature Humidity Sensor.Through the invention in the inlet tube of condenser
Road mounting temperature sensor T1, pressure sensor PS1, the mounting temperature sensor T2 on export pipeline, on inlet pipeline
Mounting temperature sensor T5, temperature sensor T6 and electric two-way valve on outlet pipeline can thus detect cold at any time
Condenser inflow temperature, leaving water temperature, inlet temperature, inlet pressure, outlet temperature obtain after these data in order to controlling accordingly
System, while present invention also adds bypass lines, in the case where condensing agent usage amount is little, can be returned with by-passing part refrigerant
Into condenser, first, reaching energy-efficient purpose, but the refrigerant after refrigeration can be cooled down so that the heat dissipation effect of condenser
More preferably.The present invention is also mounted with outlet air Temperature Humidity Sensor and air return temperature humidity sensor due to detecting return air temperature on an evaporator
Humidity and outlet air humiture, convenient for requiring to be adjusted to refrigeration, convenient for controlling entire air-conditioning system.
2, it is also parallel with branch line on the pipeline that condenser of the present invention is connected with fluorine pump, liquid storage is connected on branch line
The inlet and outlet of device, liquid storage device is respectively connected with ball valve, ball valve is equipped on the pipeline that condenser is connected with fluorine pump, liquid storage device connects
It is connected to liquid-level switch.Liquid storage device is excessively the amount of adjustable refrigerant in refrigerant, while in refrigerant for storing refrigerant
Refrigerant is provided in the case of not enough, the effect of liquid-level switch is to weigh the amount of liquid storage device inner refrigerant, reaches warning refrigerant
Measure insufficient effect.
3, fluorine pump of the present invention has two, and the inlet and outlet of two fluorine parallels connection of pumps, two fluorine pump is respectively connected with ball valve,
The outlet of two fluorine pump is respectively connected with check valve.Two fluorine pumps, one work one is spare, changeable in this way to use, and event is occurring
When barrier, refrigeration system can also work normally, stability higher.
4, the present invention provides the control method of air-conditioning system, including interior machine control method and outer machine control method, interior machines
Control method includes interior machine start-up control method and electronic expansion valve opening control method, and outer machine control method includes outer machine booting
Control method, electric two-way valve aperture control method, bypass solenoid valve control method, fluorine pump method for handover control, liquid-level switch
Control method, condenser inflow temperature control method.By these controls, temperature that can be in reed time controll computer room ensures machine
Thermostatic constant humidity in room, two fluorine pumps, one spare, a job, and can also switch after long-play, Neng Goubao
It demonstrate,proves data center machine room whole day to run without interruption for 24 hours, air conditioner in machine room can realize long-term run without interruption and with high
Reliability is less prone to failure, and it is not in condensation that the appliance devices such as server in machine room can be allowed by, which being accurately controlled by these,
The case where, using a variety of low-temperature receivers, such as the chilled water of building central air-conditioning, natural cooling source.Water only enters condenser, not into
Enter in data center machine room.It can avoid that water leakage occurs, jeopardize the safety of computer room inner electronic equipment.
Description of the drawings
Fig. 1 is the outer machine structural schematic diagram of the present invention.
Fig. 2 is machine structural schematic diagram in the present invention.
Reference numeral 1, condenser, 2, fluorine pump, 3, evaporator, 4, electric expansion valve, 5, temperature sensor T1,6, pressure passes
Sensor PS1,7, temperature sensor T2,8, temperature sensor T5,9, temperature sensor T6,10, electric two-way valve, 11, temperature passes
Sensor T3,12, pressure sensor PS2,13, temperature sensor T4,14, pressure sensor PS3,15, bypass line, 16, bypass
Solenoid valve, 17, temperature sensor T7,18, pressure sensor PS4,19, temperature sensor T8,20, pressure sensor PS5,21,
Branch line, 22, liquid storage device, 23, ball valve, 24, liquid-level switch, 25, check valve, 26, device for drying and filtering, 27, liquid-sighting glass.
Specific implementation mode
With reference to embodiment, the invention will be further described, and described embodiment is only a present invention part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other embodiments used obtained under the premise of creative work, belong to protection scope of the present invention.
The present invention provides a kind of computer-room air conditioning systems comprising outer machine（As shown in Figure 1）With interior machine（As shown in Figure 2）,
Outer machine is connected with interior machine, and outer machine includes condenser（1）It is pumped with fluorine（2）, interior machine includes evaporator（3）And electric expansion valve（4）, cold
Condenser（1）Outlet pass through pipeline and fluorine and pump（2）Import be connected, fluorine pump（2）Outlet pass through pipeline and electric expansion valve（4）
Import be connected, electric expansion valve（4）Outlet pass through pipeline and evaporator（3）Import be connected, evaporator（3）Outlet with
Condenser（1）Import be connected, the condenser（1）Inlet ductwork on be connected with temperature sensor T1（5）And pressure sensing
Device PS1（6）, the condenser（1）Export pipeline on be connected with temperature sensor T2（7）, the condenser（1）Water inlet pipe
Road temperature sensor T5（8）, the condenser（1）Outlet pipeline on be connected with temperature sensor T6（9）With electronic two-way
Valve（10）, the fluorine pump（2）Inlet ductwork on be connected with temperature sensor T3（11）With pressure sensor PS2（12）, described
Fluorine pumps（2）Export pipeline on be connected with temperature sensor T4（13）With pressure sensor PS3（14）, the fluorine pump（2）With electricity
Sub- expansion valve（4）It is connected with bypass line on connected pipeline（15）, bypass line（15）The other end be connected to condenser（1）
Inlet ductwork on, bypass line（15）On be connected with bypass solenoid valve（16）, the electric expansion valve（4）Inlet ductwork on
It is connected with temperature sensor T7（17）With pressure sensor PS4（18）, the evaporator（3）Export pipeline on be connected with temperature
Sensor T8（19）With pressure sensor PS5（20）, the evaporator（3）It is also equipped with air return temperature humidity sensor and goes out wind-warm syndrome
Humidity sensor.
The condenser（1）It is pumped with fluorine（2）It is also parallel with branch line on connected pipeline（21）, branch line（21）On
It is connected with liquid storage device（22）, liquid storage device（22）Inlet and outlet be respectively connected with ball valve（23）, condenser（1）It is pumped with fluorine（2）Phase
Ball valve is installed on pipeline even（23）, liquid storage device（22）It is connected with liquid-level switch（24）.
The fluorine pump（2）There are two, two fluorine parallels connection of pumps.
Two fluorine pumps（2）Inlet and outlet be respectively connected with ball valve（23）, two fluorine pumps（2）Outlet be respectively connected with unidirectionally
Valve（25）.
The fluorine pump（2）With electric expansion valve（4）It is also equipped with device for drying and filtering on connected pipeline（26）And ball valve
（23）, the evaporator（3）With condenser（1）It is also connected with ball valve on connected pipeline（23）.
The device for drying and filtering（26）Export pipeline and inlet ductwork on liquid-sighting glass is installed（27）.
The condenser is the water-cooled condensers such as plate heat exchanger, tube-in-tube condenser, shell and tube condenser.
The present invention also provides the control method of above-mentioned air-conditioning system, including interior machine control method and outer machine control method,
Interior machine control method includes interior machine start-up control method and electronic expansion valve opening control method, and outer machine control method includes outer machine
Start-up control method, electric two-way valve aperture control method, bypass solenoid valve control method, fluorine pump method for handover control, liquid level
Method of controlling switch, condenser inflow temperature control method.
The interior machine start-up control method is specially：
When：When detected value ＞ setting values+dead zone, refrigeration demand=((detected value-setting value-dead zone)/precision) * 100%；
When：When setting value-dead zone≤detected value≤setting value+dead zone, refrigeration demand=0；
When：Detected value<When setting value-dead zone, refrigeration demand=((detected value-setting value+dead zone)/precision) * 100%；
Interior machine booting operation, refrigeration demand ＜ -100%, interior machine are out of service when the refrigeration demand ＞ 0；When interior machine is switched on
After operation, only refrigeration demand ＜ -100% can just stop, after interior machine is out of service, the interior machine just meeting of when only refrigeration demand ＞ 0
Booting operation.
The detected value is the detected value of evaporator return air temperature, that is, the value that air return temperature humidity sensor detects,
The setting value is the setting value of evaporator return air temperature, and user can be configured according to actual conditions, and setting value is
28 DEG C -40 DEG C are defaulted as 35 DEG C, and the dead zone is dead zone temperature, and setting value is 0.5 DEG C -2 DEG C, and default value is 1 DEG C.
The precision refers to that the required precision of evaporator return air temperature, user oneself can be arranged, and setting value is 1 DEG C -10 DEG C, is write from memory
Think 1 DEG C.
The electronic expansion valve opening control method is specially：
When：Detected value>When setting value+dead zone, demand=((detected value-setting value-dead zone)/precision) * 100%；
When：When setting value-dead zone≤detected value≤setting value+dead zone, demand=0；
When：Detected value<When setting value-dead zone, demand=((detected value-setting value+dead zone)/precision) * 100%；
When demand≤0%, electric expansion valve minimum aperture；
When demand >=100%, electric expansion valve maximum opening；
When 0%≤demand≤100%, electronic expansion valve opening is directly proportional to demand；
The detected value is the detected value of evaporator leaving air temp, that is, the value that outlet air Temperature Humidity Sensor detects, described
Leaving air temp setting value is the setting value of evaporator leaving air temp, which is 17-28 DEG C, is defaulted as 24 DEG C, the dead zone
For dead zone temperature, the dead zone is dead zone temperature, and setting value is 0.5 DEG C -2 DEG C, and default value is 1 DEG C.The precision refers to steaming
The required precision of device leaving air temp is sent out, user oneself can be arranged, and setting value is 1 DEG C -10 DEG C, is defaulted as 1 DEG C.
The evaporation fan of evaporator controls：Evaporation fan is EC wind turbines, and EC wind turbines have " constant speed mode " and " temperature difference is average "
Optional, specific model selection adjusts operation according to dead zone and precision,
The outer machine start-up control method is specially：Booting, unit are in standby, and electric two-way valve is in minimum aperture,
Machine in detection, when interior machine has refrigeration demand（There is the fluid path solenoid valve of interior machine to open）, fluorine pump is opened, when the fluid path electromagnetism of interior machine
Valve Close All, fluorine pump is out of service, and electric two-way valve is in minimum aperture.
The electric two-way valve aperture control method is specially：
When：Electric two-way valve keeps minimum aperture, the Ta to give tacit consent to 12 DEG C when temperature sensor T2≤Ta, and 10 DEG C to 20 DEG C can
If 0.1 DEG C of indexing, the Omin is defaulted as 20%, and 10% to 50% can set, indexing 1%.
When：Temperature sensor T2 >=Tb, Tb>When Ta, electric two-way valve keeps maximum opening Omax operations, the Tb acquiescences
14 DEG C, 10 DEG C to 20 DEG C can set, and index 0.1 DEG C, the Omax acquiescences 100%, 60% to 100% can set, indexing 1%.
When：When Ta ＜ T2 ＜ Tb, electric two-way valve carries out PID control adjusting, the PID by Omin to Omax according to demand
The algorithm of control and regulation is：Parameter P is set by system between 50-200；Parameter I is set by user between 100-210, ginseng
Number D is set by user between 0-100；
Error current：Current_err=set temperature value Ta-current temperature value T2；Last error：last_err=
prev_err（Upper last time error）；Upper last time error：prev_err=current_err；If the meaning is exactly when dividing three
Between section test current temperature value three times, the error log obtained when testing for the first time is error current, after second is tested, first
The error of secondary test is registered as last error, and second of error is registered as error current, after third time is tested, third
The error of secondary test is registered as error current, and the error of second of test is registered as last error, test for the first time
Error is registered as last error, and the error of third time test is registered as error current.
Demand Request=P * (current_err-prev_err)+I * current_err+D* (
Current_err -2*prev_err+last_err),
As demand Request ＞ 0, no electric two-way valve aperture demand, electric two-way valve maintains minimum aperture Omin.
As demand Request ＜ 0,
Two-way valve opening O=| Request | 100+Omin of ÷；（Omin ＜ O ＜ Omax）.
Such as：Error=set temperature value Ta-current temperature value the T2 measured for the first time, it is assumed that Ta=12, T2=12.5,
The error so measured for the first time=Ta- T2=- 0.5, it is assumed that T2=11 measured for the second time, error=1 measured for the second time are false
If T2=11.5 that third time is measured, the error measured for the third time is 0.5.Error current current_err=0.5 in this way, upper one
Secondary error：Last_err=1, upper last time error prev_err=- 0.5, Request=P * (current_err-prev_
err) + I * current_err + D*( current_err - 2*prev_err + last_err)=135*（0.5-（-
0.5））+100*0.5+10*（0.5-2*（-0.5）+1）=175 ＞ 0, electric two-way valve maintain minimum aperture Omin.
The bypass solenoid valve control method is specially：
Fluorine pump inlet pressure P2（Unit：bar）Fluorine pump discharge pressure P3（Unit：bar）, give tacit consent to bypass solenoid valve ON pressure
5.5bar, as P3- P2=5.5bar, bypass solenoid valve is opened（Range can be arranged in bypass solenoid valve ON pressure：2-8bar, point
Degree=0.1bar）；
Acquiescence bypass solenoid valve OFF pressure is 4.5bar, as P3-P2=4.5bar, and ON pressure>When OFF pressure, electromagnetism is bypassed
Valve is closed（Range can be arranged in bypass solenoid valve OFF pressure：2-8bar, indexing=0.1bar,）.
Fluorine pumps method for handover control：
One fluorine pump operation time reaches 720h（1h to 3000h can be set, indexing：1h, default value：720h）, switch to another fluorine
Pump operation；
In fluorine pump operation, fluorine pump discharge, import pressure difference need to be detected：P3-P2；P3-P2≤1.2bar,（0 to 5bar can set, point
Degree：0.1bar, default value：1.2bar）；Duration 60s,（0 to 600s can set, indexing：1s, default value 60s）, switching fluorine pump
Operation, and outputting alarm：" a few # fluorine failure of pump "；
When being switched to another fluorine pump operation, delay 60s detection fluorine pumps inlet outlet pressure differential（Delay time 0 can be set to 600s, be divided
Degree：1s, default value 60s）；
It is not released in " 1# fluorine failure of pump " and " 2# fluorine failure of pump ", maintains current fluorine pump operation, a fluorine failure of pump can
It automatically terminates, two fluorine failure of pump can only release manually, release alert if：Fluorine pump discharge and import pressure difference：P3-P2≥
2bar；Because of fluorine pump discharge and import pressure difference：Fluorine failure of pump caused by P3-P2≤1.2bar, fluorine pump are not shut down；When fluorine pump switching,
The fluorine pump of operation is out of service, is delayed after 5s, starts other fluorine pump.
Liquid-level switch control method is specially：
In fluorine pump operation, float liquid level switch is connected, the duration：30s, alarm：" lack of refrigerant ".But it does not shut down.
Condenser inflow temperature control method is specially：
In fluorine pump operation, condenser water inlet water temperature T 5, T5 >=15 DEG C need to be detected（12 DEG C to 25 DEG C can set, indexing：It 0.1 DEG C, writes from memory
Recognize 15 DEG C of value）, alarm：" inflow temperature is excessively high ", but do not shut down.
Claims (10)
1. a kind of computer-room air conditioning system, including outer machine and interior machine, outer machine are connected with interior machine, outer machine includes that condenser and fluorine pump, interior
Machine includes evaporator and electric expansion valve, and the outlet of condenser is connected with the import that fluorine pumps, the outlet of fluorine pump and electric expansion valve
Import be connected, the outlet of electric expansion valve is connected with the import of evaporator, and the outlet of evaporator is connected with the import of condenser,
It is characterized in that：Temperature sensor T1 and pressure sensor PS1, the condensation are connected in the inlet ductwork of the condenser
It is connected with temperature sensor T2 on the export pipeline of device, temperature sensor T5 on the inlet pipeline of the condenser, the condensation
It is connected with temperature sensor T6 and electric two-way valve on the outlet pipeline of device, temperature biography is connected in the inlet ductwork of the fluorine pump
Sensor T3 and pressure sensor PS2 is connected with temperature sensor T4 and pressure sensor PS3 on the export pipeline of the fluorine pump,
It is connected with bypass line on the pipeline that the fluorine pump is connected with electric expansion valve, the other end of bypass line is connected to condenser
In inlet ductwork, it is connected with bypass solenoid valve on bypass line, temperature biography is connected in the inlet ductwork of the electric expansion valve
Sensor T7 and pressure sensor PS4 is connected with temperature sensor T8 and pressure sensor on the export pipeline of the evaporator
PS5, the evaporator are also equipped with air return temperature humidity sensor and outlet air Temperature Humidity Sensor.
2. a kind of computer-room air conditioning system according to claim 1, it is characterised in that：The condenser pumps the pipe being connected with fluorine
Road is also parallel with branch line, liquid storage device is connected on branch line, the inlet and outlet of liquid storage device is respectively connected with ball valve, cold
Ball valve is installed on the pipeline that condenser is connected with fluorine pump, liquid storage device is connected with liquid-level switch.
3. a kind of computer-room air conditioning system according to claim 1, it is characterised in that：The fluorine pump has two, two fluorine pumps
It is in parallel.
4. a kind of computer-room air conditioning system according to claim 1, it is characterised in that：The fluorine pump is connected with electric expansion valve
Pipeline on be also equipped with device for drying and filtering, fluid path solenoid valve and ball valve, on the pipeline that the evaporator is connected with condenser
It is connected with ball valve.
5. a kind of control method of computer-room air conditioning system as described in claim 1, including interior machine control method and the control of outer machine
Method, the interior machine control method include interior machine start-up control method, and the interior machine start-up control method is specially：
When：When detected value ＞ setting values+dead zone, refrigeration demand=((detected value-setting value-dead zone)/precision) * 100%；
When：When setting value-dead zone≤detected value≤setting value+dead zone, refrigeration demand=0；
When：Detected value<When setting value-dead zone, refrigeration demand=((detected value-setting value+dead zone)/precision) * 100%；
Interior machine booting operation, refrigeration demand ＜ -100%, interior machine are out of service when the refrigeration demand ＞ 0；When interior machine is switched on
After operation, only refrigeration demand ＜ -100% can just stop, after interior machine is out of service, the interior machine just meeting of when only refrigeration demand ＞ 0
Booting operation.
6. the control method of computer-room air conditioning system according to claim 5, it is characterised in that：The interior machine control method is also
Including electronic expansion valve opening control method, specially：
When：Leaving air temp detected value>When leaving air temp setting value+dead zone, demand=((leaving air temp detected value-outlet air
Desired temperature-dead zone)/precision) * 100%；
When：When leaving air temp setting value-dead zone≤leaving air temp detected value≤leaving air temp setting value+dead zone, demand
=0；
When：Leaving air temp detected value<When leaving air temp setting value-dead zone, demand=((leaving air temp detected value-outlet air
Desired temperature+dead zone)/precision) * 100%；
When demand≤0%, electric expansion valve minimum aperture；
When demand >=100%, electric expansion valve maximum opening；
When 0%≤demand≤100%, electronic expansion valve opening is directly proportional to demand；
The electric expansion valve minimum superheat is 0.5-1K.
7. the control method of computer-room air conditioning system according to claim 5, it is characterised in that：The outer machine control method packet
Electric two-way valve aperture control method is included, specially：
When：Electric two-way valve keeps minimum aperture when temperature sensor T2≤Ta, is run with Omin, -20 DEG C of Ta=10 DEG C,
Omin=the 10%-50%；
When：Temperature sensor T2 >=Tb, Tb>When Ta, electric two-way valve keeps maximum opening, is run with Omax, Tb=10
DEG C -20 DEG C, the Omax=60%-100%；
When：When Ta ＜ T2 ＜ Tb, electric two-way valve carries out PID control adjusting, the PID control by Omin to Omax according to demand
The algorithm of adjusting is：Parameter P is set by system between 50-200；Parameter I is set by user between 100-210, parameter D by
User sets between 0-100；
Error current：Current_err=set temperature value Ta-current temperature value T2；
Last error：last_err=prev_err；
Upper last time error：prev_err=current_err；
Demand Request=P * (current_err-prev_err)+I * current_err+D* (
Current_err -2*prev_err+last_err),
As demand Request ＞ 0, no electric two-way valve aperture demand, electric two-way valve maintains minimum aperture Omin；
As demand Request ＜ 0, electric two-way valve aperture=| Request | 100+Omin of ÷；（Omin ＜ are electronic
Two-way valve opening ＜ Omax）.
8. the control method of computer-room air conditioning system according to claim 5, it is characterised in that：The outer machine control method is also
Including bypass solenoid valve control method, specially：
Fluorine pump inlet pressure P2, fluorine pump discharge pressure P3, bypass solenoid valve ON pressure values are set manually, the range of the setting value
For 2-8bar, when the P3-P2 that detected=bypass solenoid valve ON pressure values, bypass solenoid valve is opened；Bypass solenoid valve OFF
Pressure value is set manually, which is 2-8bar, when the P3-P2 that detected=bypass solenoid valve OFF pressure values
Bar, and ON pressure>When OFF pressure, bypass solenoid valve is closed.
9. the control method of computer-room air conditioning system according to claim 5, it is characterised in that：The outer machine control method is also
Method for handover control is pumped including fluorine, specially：
After a fluorine pump operation time reaching the switchover operation time of setting, another fluorine pump operation, the switching are switched to
The ranging from 1-3000h of run time setting；
In fluorine pump operation, fluorine pump discharge, import pressure difference need to be detected：P3-P2≤pressure differential resetting value, and the duration >=continue
When time setting value, switch fluorine pump operation, and outputting alarm：" a few # fluorine failure of pump ", the ranging from 0- of the pressure differential resetting value
5bar, the ranging from 0-600s of the duration setting value；
Fluorine, which is detected, when being switched to another fluorine pump operation, after delay adjustments value pumps inlet outlet pressure differential, the model of the delay adjustments value
It encloses for 0-600s；
It is not released in " 1# fluorine failure of pump " and " 2# fluorine failure of pump ", maintains current fluorine pump operation, a fluorine failure of pump can
It automatically terminates, two fluorine failure of pump can only release manually, release alert if：Fluorine pump discharge and import pressure difference：P3-P2≥
2bar；Because of fluorine pump discharge and import pressure difference：Fluorine failure of pump caused by P3-P2≤1.2bar, fluorine pump are not shut down；When fluorine pump switching,
The fluorine pump of operation is out of service, is delayed after 5s, starts other fluorine pump.
10. the control method of computer-room air conditioning system according to claim 5, it is characterised in that：The outer machine control method
Further include condenser inflow temperature control method, specially：
In fluorine pump operation, condenser water inlet water temperature T 5, when T5 >=water temperature set temperature, alarm need to be detected：" inflow temperature mistake
It is high ", but do not shut down, ranging from 12 DEG C -25 DEG C of the water temperature set temperature.
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