CN110220257A - The progress control method and device of air-conditioning system, air-conditioning system - Google Patents

The progress control method and device of air-conditioning system, air-conditioning system Download PDF

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Publication number
CN110220257A
CN110220257A CN201810171651.5A CN201810171651A CN110220257A CN 110220257 A CN110220257 A CN 110220257A CN 201810171651 A CN201810171651 A CN 201810171651A CN 110220257 A CN110220257 A CN 110220257A
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China
Prior art keywords
compressor
air
conditioning system
revolving speed
threshold value
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Granted
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CN201810171651.5A
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Chinese (zh)
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CN110220257B (en
Inventor
李秀玲
刘畅
林华和
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Vertiv Tech Co Ltd
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Vertiv Tech Co Ltd
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Classifications

    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses the progress control methods and device of a kind of air-conditioning system, air-conditioning system.The adjustment of the air-conditioning system refrigeration mode takes closed loop control logic, adjusts more accurately so as to the working condition realization to modules, and then improve the efficiency of air-conditioning system.Specifically, first according to the first output revolving speed of indoor first return air temperature adjustment compressor, then gradually adjust the first rotation speed of fan of blower be arranged at evaporator；According to the working condition of the evaporating temperature adjustment restricting element at the degree of superheat and compressor；Later, after blower be arranged stablizes output under determining working condition with the first output revolving speed and the work of the first rotation speed of fan and restricting element respectively at the compressor and evaporator, the condensing pressure and indoor second return air temperature at compressor at this time are obtained, and determines the refrigeration demand revolving speed of compressor at this time according to the second return air temperature；Finally, according to the working condition of condensing pressure and refrigeration demand revolving speed adjustment compressor.

Description

The progress control method and device of air-conditioning system, air-conditioning system
Technical field
The present invention relates to technical field of refrigeration equipment, the operation more particularly to a kind of air-conditioning system, air-conditioning system is controlled Method and device.
Background technique
The fast development of information industry and digital Construction has pushed data center, the quantity of communication base station and construction rule The rapid growth of mould.According to statistics, air conditioning energy consumption accounts for about the 40%~50% of its total energy consumption in computer room, base station, computer room, base station Sensible heat load is bigger, needs continuous cooling to run throughout the year.Therefore, the annual Energy Efficiency Ratio of air-conditioning how is improved, is reduced empty Adjusting energy consumption is a technical problem to be solved urgently.
In addition, at present high fever density data center heat dissipation compare frequently with scheme are as follows: the freezing for producing water cooler Water is passed directly into the cooling coil being arranged in data cabinet, is computer room cooling by cooling coil and air heat-exchange, this Once the maximum hidden danger of scheme is cooling coil leak, immeasurable loss will lead to.
Summary of the invention
The purpose of the embodiment of the present invention is that the progress control method and device of a kind of air-conditioning system, air-conditioning system are provided, with The efficiency of air-conditioning system is improved, and improves the functional reliability of air-conditioning system.
Air-conditioning system provided by the embodiment of the present invention, comprising:
Compressor, condenser, restricting element and the evaporator of closed circulation are linked in sequence and formed by pipeline；
Temperature detecting module, for detecting the suction temperature at indoor return air temperature and compressor；
Pressure detecting module, for detecting evaporating pressure and condensing pressure at compressor；
Controller connect with compressor, restricting element, temperature detecting module and pressure detecting module, is used for:
The first return air temperature is obtained, the first refrigeration demand is determined according to the first return air temperature；According to the first refrigeration demand, adjust First output revolving speed of whole compressor；
According to the first output revolving speed of indoor first return air temperature and compressor, and the indoor return air temperature, the pressure that prestore Corresponding relationship at the output revolving speed and evaporator of contracting machine between the revolving speed of blower be arranged, determines blower be arranged at evaporator The first rotation speed of fan, control the blower and worked with the first rotation speed of fan；
According to the suction temperature and evaporating pressure at compressor, the degree of superheat of air-conditioning system is determined, and according to compressor The evaporating pressure at place determines evaporating temperature；According to the degree of superheat and evaporating temperature, determine that restricting element is in the response degree of superheat Control model or control model in response evaporating temperature, and determine work of the restricting element under locating control model State；
It obtains air-conditioning system blower be arranged at compressor and evaporator and exports revolving speed and the first blower respectively with first When rotary speed working and restricting element work under identified working condition, the condensing pressure at compressor and second time Air temperature；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines that the refrigeration of compressor needs Seek revolving speed；
According to condensing pressure and refrigeration demand revolving speed, determine compressor be in response condensing pressure control model or Control model in response refrigeration demand, and determine working condition of the compressor under locating control model.
In technical solution of the embodiment of the present invention, each mould can be adjusted according to the running state parameter of air-conditioning system in real time The working condition of block operates in modules always in reliable working range, while can play compression to the maximum extent The refrigerating capacity of machine, to reduce the energy consumption of air-conditioning system.Specifically, being adjusted first according to indoor the first current return air temperature First output revolving speed of compressor, then gradually adjust the first rotation speed of fan of blower be arranged at evaporator；Then, according to air-conditioning The working condition of the degree of superheat of system and the evaporating temperature adjustment restricting element at compressor；Later, in compressor and evaporation Blower be arranged is respectively with the first output revolving speed and the work of the first rotation speed of fan and restricting element in determining work shape at device After stablizing output under state, the condensing pressure and indoor second return air temperature at compressor at this time are obtained, and according to the second return air Temperature determines the refrigeration demand revolving speed of compressor at this time；Finally, adjusting compressor according to condensing pressure and refrigeration demand revolving speed Working condition.As it can be seen that the adjustment of the air-conditioning system refrigeration mode takes closed loop control logic, so as to modules Working condition realization adjust more accurately, and then effectively improve the efficiency of air-conditioning system.And in embodiments of the present invention, Logic judgment can be carried out automatically according to the information of condensing pressure and refrigeration demand thus will be to the control of compressor operating state System is switched to suitable mode；Similarly, logic judgment is carried out automatically according to the information of the degree of superheat and evaporating temperature to also can It is enough to be switched to suitable mode to the control of restricting element working condition, it is in compressor and restricting element always In reliable efficient running environment, the energy consumption of air-conditioning system is further improved.
In addition, being formed in air-conditioning system of the embodiment of the present invention by compressor, condenser, restricting element and evaporator Refrigerant heat exchanger is used in closed circulation pipeline, the anhydrous refrigeration of data center may be implemented, therefore can preferably solve sky The seepy question of adjusting system, to promote the reliability of air-conditioning system.
Optionally, controller is specifically used for:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensation pressure The control model of power, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than less than the first output revolving speed of the first condensing pressure threshold value and compressor It when refrigeration demand revolving speed, determines that compressor is in the control model of response refrigeration demand, and controls compressor and turned with refrigeration demand Speed work.
Optionally, controller is further used for:
Under conditions of compressor is in the control model of response condensing pressure, condensing pressure at compressor is less than the When two condensing pressure threshold values, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
Optionally, controller is specifically used for:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporation The control model of temperature, the aperture for controlling restricting element reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, Determine that restricting element adjusts restricting element according to the degree of superheat and degree of superheat threshold value in the control model of the response degree of superheat Aperture.
Optionally, controller is further used for:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than When the second evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Optionally, air-conditioning system further includes oil eliminator and concatenated solenoid valve and capillary, the air inlet of oil eliminator Mouth is connect with the outlet of compressor, the entrance connection of gas outlet and condenser, the solenoid valve that the oil outlet of oil eliminator is concatenated It is connected with the entrance of capillary and compressor；Controller is also connect with solenoid valve, is used for:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
Using the example scheme, in the first time period that solenoid valve is closed, air-conditioning system works in refrigeration mode, this When can adjust the working conditions of modules in real time according to the running state parameter of air-conditioning system, run modules always In reliable working range, to achieve the purpose that reduce the energy consumption of air-conditioning system to greatest extent；Second opened in solenoid valve In period, air-conditioning system works in oil return mode, the lubricating oil mixed in refrigerant can in the bottom deposit of oil eliminator, And compressor is returned to by capillary, enable the reliable oil return of air-conditioning system, ensure that the reliable operating of compressor.
Optionally, it the quantity at least two of compressor and is arranged in parallel.
Optionally, condenser is air cooled condenser.
Optionally, condenser is plate-type condenser or shell and tube condenser, and air-conditioning system further includes cooling tower, condenses utensil There are the refrigerant passage being isolated and water passage, the both ends of refrigerant passage are connect with compressor and restricting element respectively, and water is logical Road connect forming circuit with cooling tower.
Optionally, air-conditioning system further includes gas-liquid separator, the entrance and exit of gas-liquid separator respectively with evaporator Outlet is connected with the entrance of compressor.
Based on identical inventive concept, the embodiment of the invention also provides a kind of progress control method of air-conditioning system, packets It includes:
The first return air temperature is obtained, the first refrigeration demand is determined according to the first return air temperature；According to the first refrigeration demand, adjust First output revolving speed of whole compressor；
According to the first output revolving speed of indoor first return air temperature and compressor, and the indoor return air temperature, the pressure that prestore Corresponding relationship at the output revolving speed and evaporator of contracting machine between the revolving speed of blower be arranged, determines blower be arranged at evaporator The first rotation speed of fan, control the blower and worked with the first rotation speed of fan；
According to the suction temperature and evaporating pressure at compressor, the degree of superheat of air-conditioning system is determined, and according to compressor The evaporating pressure at place determines evaporating temperature；According to the degree of superheat and evaporating temperature, determine that restricting element is in the response degree of superheat Control model or control model in response evaporating temperature, and determine work of the restricting element under locating control model State；
It obtains air-conditioning system blower be arranged at compressor and evaporator and exports revolving speed and the first blower respectively with first When rotary speed working and restricting element work under identified working condition, the condensing pressure at compressor and second time Air temperature；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines that the refrigeration of compressor needs Seek revolving speed；
According to condensing pressure and refrigeration demand revolving speed, determine compressor be in response condensing pressure control model or Control model in response refrigeration demand, and determine working condition of the compressor under locating control model.
Air-conditioning system uses the progress control method of above-described embodiment, can be real according to the running state parameter of air-conditioning system When adjust modules working condition, operate in modules always in reliable working range, while being capable of maximum limit Degree ground plays the refrigerating capacity of compressor, to reduce the energy consumption of air-conditioning system.
Optionally, described according to condensing pressure and refrigeration demand revolving speed, determine that compressor is in response condensing pressure Control model or control model in response refrigeration demand, and determine work shape of the compressor under locating control model State, comprising:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensation pressure The control model of power, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than less than the first output revolving speed of the first condensing pressure threshold value and compressor It when refrigeration demand revolving speed, determines that compressor is in the control model of response refrigeration demand, and controls compressor and turned with refrigeration demand Speed work.
Optionally, the method also includes:
Under conditions of compressor is in the control model of response condensing pressure, condensing pressure at compressor is less than the When two condensing pressure threshold values, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
Optionally, described according to the degree of superheat and evaporating temperature, determine that restricting element is in the control mould of the response degree of superheat Formula or control model in response evaporating temperature, and determine working condition of the restricting element under locating control model, Include:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporation The control model of temperature, the aperture that control restricting element starts reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, Determine that restricting element adjusts restricting element according to the degree of superheat and degree of superheat threshold value in the control model of the response degree of superheat Aperture.
Optionally, the method also includes:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than When the second evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Optionally, air-conditioning system further includes oil eliminator and concatenated solenoid valve and capillary, the air inlet of oil eliminator Mouth is connect with the outlet of compressor, the entrance connection of gas outlet and condenser, the solenoid valve that the oil outlet of oil eliminator is concatenated It is connected with the entrance of capillary and compressor；The method also includes:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
Based on identical inventive concept, the embodiment of the invention also provides a kind of operating control device of air-conditioning system, packets It includes:
First acquisition unit, for obtaining the first return air temperature；
First control unit determines the first refrigeration demand according to the first return air temperature；According to the first refrigeration demand, adjustment pressure First output revolving speed of contracting machine；
Second control unit, according to the first output revolving speed of indoor first return air temperature and compressor, and the room prestored Interior return air temperature, compressor output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine and evaporate The first rotation speed of fan of blower be arranged, is controlled the blower and is worked with the first rotation speed of fan at device；
First determination unit determines the degree of superheat of air-conditioning system according to the suction temperature and evaporating pressure at compressor, with And evaporating temperature is determined according to the evaporating pressure at compressor；According to the degree of superheat and evaporating temperature, determine that restricting element is in The control model of the degree of superheat or the control model in response evaporating temperature are responded, and determines restricting element in locating control Working condition under mode；
Second acquisition unit, it is defeated with first respectively for obtaining air-conditioning system blower be arranged at compressor and evaporator It is cold at compressor when revolving speed and the work of the first rotation speed of fan and restricting element work under identified working condition out Solidifying pressure and the second return air temperature；
Second determination unit, for determining the second refrigeration demand according to the second return air temperature, and according to the second refrigeration demand, Determine the refrigeration demand revolving speed of compressor；
Third determination unit, for determining that compressor is in response condensation according to condensing pressure and refrigeration demand revolving speed The control model of pressure or in response refrigeration demand control model, and determine compressor under locating control model Working condition.
It similarly, can be real-time according to the running state parameter of air-conditioning system using the operating control device of above-described embodiment The working condition for adjusting modules, operates in modules always in reliable working range, while can be to greatest extent Ground plays the refrigerating capacity of compressor, to reduce the energy consumption of air-conditioning system.
Optionally, the third determination unit is specifically used for:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensation pressure The control model of power, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than less than the first output revolving speed of the first condensing pressure threshold value and compressor It when refrigeration demand revolving speed, determines that compressor is in the control model of response refrigeration demand, and controls compressor and turned with refrigeration demand Speed work.
Optionally, the third determination unit is further used for:
Under conditions of compressor is in the control model of response condensing pressure, condensing pressure at compressor is less than the When two condensing pressure threshold values, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
Optionally, first determination unit is specifically used for:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporation The control model of temperature, the aperture for controlling restricting element reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, Determine that restricting element adjusts restricting element according to the degree of superheat and degree of superheat threshold value in the control model of the response degree of superheat Aperture.
Optionally, first determination unit is further used for:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than When the second evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Optionally, air-conditioning system further includes oil eliminator and concatenated solenoid valve and capillary, the air inlet of oil eliminator Mouth is connect with the outlet of compressor, the entrance connection of gas outlet and condenser, the solenoid valve that the oil outlet of oil eliminator is concatenated It is connected with the entrance of capillary and compressor；Described device further includes third control unit, is used for:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention air-conditioning system；
Fig. 2 is the structural schematic diagram of another embodiment air-conditioning system of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the another embodiment air-conditioning system of the embodiment of the present invention；
Fig. 4 is the flow diagram of the progress control method of air-conditioning system of the embodiment of the present invention；
Fig. 5 is the idiographic flow schematic diagram of embodiment illustrated in fig. 3 step 105；
Fig. 6 is the idiographic flow schematic diagram of embodiment illustrated in fig. 3 step 103；
Fig. 7 is the structural schematic diagram of the operating control device of air-conditioning system of the embodiment of the present invention.
Appended drawing reference:
10- compressor 20- condenser 30- restricting element 40- evaporator
50- oil eliminator 51- solenoid valve 52- capillary 60- cooling tower
70- gas-liquid separator 11- the first solenoid valve the first capillary of 12-
81- check valve 82- ball valve 83- filter 84- liquid-sighting glass
85- pressure switch
100- first acquisition unit 200- first control unit the second control unit of 300-
400- the first determination unit 500- second acquisition unit the second determination unit of 600-
700- third determination unit
Specific embodiment
To improve the efficiency of air-conditioning system, and the functional reliability of air-conditioning system is improved, the embodiment of the invention provides one The progress control method and device of kind air-conditioning system, air-conditioning system.To keep the object, technical solutions and advantages of the present invention more clear Chu, invention is further described in detail by the following examples.
As shown in Figure 1, the air-conditioning system that one embodiment of the invention provides, comprising:
Compressor 10, condenser 20, restricting element 30 and the evaporator of closed circulation are linked in sequence and formed by pipeline 40；
Temperature detecting module, for detecting the suction temperature at indoor return air temperature and compressor 10；
Pressure detecting module, for detecting evaporating pressure and condensing pressure at compressor 10；
Controller connect with compressor 10, restricting element 30, temperature detecting module and pressure detecting module, is used for:
The first return air temperature is obtained, the first refrigeration demand is determined according to the first return air temperature；According to the first refrigeration demand, adjust First output revolving speed of whole compressor 10；
According to the first output revolving speed of indoor first return air temperature and compressor 10, and prestore indoor return air temperature, Corresponding relationship at the output revolving speed and evaporator 40 of compressor 10 between the revolving speed of blower be arranged, determines 40 place of evaporator First rotation speed of fan of blower is set, controls the blower and is worked with the first rotation speed of fan；
According to the suction temperature and evaporating pressure at compressor 10, the degree of superheat of air-conditioning system is determined, and according to compression Evaporating pressure at machine 10 determines evaporating temperature；According to the degree of superheat and evaporating temperature, determines that restricting element 30 is in and responded The control model of temperature or in response evaporating temperature control model, and determine restricting element 30 in locating control model Under working condition；
It obtains air-conditioning system blower be arranged at compressor 10 and evaporator 40 and exports revolving speed and first respectively with first Rotation speed of fan work and restricting element 30 be under identified working condition when working, the condensing pressure at compressor 10 with And second return air temperature；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines compressor 10 refrigeration demand revolving speed；
According to condensing pressure and refrigeration demand revolving speed, determine compressor 10 be in response condensing pressure control model or Person is in the control model of response refrigeration demand, and determines working condition of the compressor 10 under locating control model.
It should be noted that the revolving speed of blower be arranged and indoor return air temperature and compressor export revolving speed at evaporator Correlation is based on this, can in advance will indoor return air temperature, at compressor output revolving speed and evaporator between the revolving speed of blower be arranged Corresponding relationship be stored in controller, in order to determine the revolving speed of blower be arranged at evaporator according to the corresponding relationship.
Wherein, the concrete type of condenser 20 is unlimited, such as can be air-cooled condenser, plate-type condenser or shell-tube type The types such as condenser.When condenser 20 is plate-type condenser or shell and tube condenser, plate-type condenser as shown in Figure 3 is empty Adjusting system further includes cooling tower 60, and condenser 20 has the refrigerant passage being isolated and water passage, the both ends of refrigerant passage It is connect respectively with compressor 10 and restricting element 30, water passage connect forming circuit with cooling tower 60.It can make full use of in this way Natural cooling source reduces the energy consumption of air-conditioning system to reduce the output and power consumption of compressor 10.The concrete type of evaporator 40 is not Limit, such as can be finned-tube evaporator or more efficient concurrent flow micro-channel evaporator, also or plate-type evaporator, package The types such as formula evaporator, this will not be repeated here.
Please refer to shown in Fig. 2, for skilled person will appreciate that, air-conditioning system, can also be in addition to above-mentioned critical component It further comprise with lower component: check valve 81, ball valve 82, filter 83, liquid-sighting glass 84, pressure switch 85, etc..Restricting element 30 concrete type is unlimited, preferably electric expansion valve.
The quantity of compressor 10 is unlimited, for example, can for one, two or more, specifically can be according to actual needs It is designed.As shown in Fig. 2, at least two compressors 10 are arranged in parallel when the quantity at least two of compressor 10.Compression The concrete type of machine 10 is unlimited, preferably variable conpacitance compressor.By compressor 10, condenser 20, restricting element 30 and evaporator 40 formed closed circulation pipelines in refrigerant optional type include R22, R410A, R407C, R744, R134a, R1234yf, R290 and R600a.In addition, in embodiments of the present invention, compressor 10 can be the compressor of included oil return function, It is connected with a pipeline between the outlet and entrance of compressor 10, the first solenoid valve 11 and the first capillary are provided in the pipeline 12, the lubricating oil mixed from the refrigerant of the outlet discharge of compressor 10 in this way can be returned again to by the first capillary 12 In compressor 10, so that compressor 10 be enable reliably to operate.
Refering to what is shown in Fig. 2, air-conditioning system further includes gas-liquid separator 70, the entrance and exit of gas-liquid separator 70 respectively with The outlet of evaporator 40 is connected with the entrance of compressor 10.Using the example scheme, by compressor 10, condenser 20, section In the closed circulation pipeline that fluid element 30 and evaporator 40 are formed, liquid refrigerant evaporation and heat-exchange, Zhi Houzhuan in evaporator 40 Gaseous state is turned to, however is inevitably mixed with partially liq particle in the refrigerant of the gaseous state, by the way that gas is arranged Liquid/gas separator 70 can separate these liquid particles in gaseous refrigerant, reduce into the liquid in compressor 10 The content of state refrigerant, so as to improve the efficiency of compressor 10.
In technical solution of the embodiment of the present invention, each mould can be adjusted according to the running state parameter of air-conditioning system in real time The working condition of block operates in modules always in reliable working range, while can play compression to the maximum extent The refrigerating capacity of machine 10, to reduce the energy consumption of air-conditioning system.Specifically, first according to indoor the first current return air temperature tune First output revolving speed of whole compressor 10, then gradually adjust the first rotation speed of fan of blower be arranged at evaporator 40；Then, root According to the working condition of the evaporating temperature adjustment restricting element 30 at the degree of superheat and compressor 10 of air-conditioning system；Later, it is pressing Blower be arranged is respectively with the first output revolving speed and the work of the first rotation speed of fan and restricting element at contracting machine 10 and evaporator 40 After 30 stablize output under determining working condition, the condensing pressure at compressor 10 at this time and indoor second return air temperature are obtained Degree, and according to the refrigeration demand revolving speed of the determining compressor 10 at this time of the second return air temperature；Finally, according to condensing pressure and refrigeration The working condition of demand revolving speed adjustment compressor 10.It is patrolled as it can be seen that the adjustment of the air-conditioning system refrigeration mode takes closed-loop control Volume, it is adjusted more accurately so as to the working condition realization to modules, and then effectively improve the efficiency of air-conditioning system.
Meanwhile in the prior art, often with single running state parameter as a reference to the work of adjustment compressor 10 Make state, is unfavorable for realizing the stable operation of air-conditioning system in this way, while can also reduce its reliability.For example, if to condense pressure Power is as reference, when condensing pressure is greater than the upper limit value of setting, by frequency reducing or will forbid raising frequency and inhibits compressor 10 Revolving speed, and when condensing pressure be less than setting upper limit value after, compressor 10 can restore to operate normally again, 10 turns of such compressor Speed probably again leads to the upper limit value that condensing pressure is more than setting after rising, frequency reducing or forbid rising again so as to cause system Frequently, the revolving speed of compressor 10 is made to carry out meaningless lifting frequency repeatedly, air-conditioning system is difficult to stable operation.To throttling Joined again using the degree of superheat obtained by evaporating temperature and evaporating pressure as single reference when the working condition of element 30 is adjusted Number, and influence of the evaporating temperature to 10 operating status of compressor is had ignored, also it is unfavorable for the energy-efficient fortune of air-conditioning system in this way Row.
And in embodiments of the present invention, logic can be carried out automatically according to the information of condensing pressure and refrigeration demand and sentenced It is disconnected, thus the control model or response refrigeration demand that response condensing pressure will be switched to the control of 10 working condition of compressor Control model；Carry out logic judgment automatically according to the information of the degree of superheat and evaporating temperature, thus also can will to throttling member The control of 30 working condition of part is switched to the control model of the response degree of superheat or responds the control model of evaporating temperature, and determines The working condition of compressor 10 and restricting element 30 under corresponding mode thus makes compressor 10 and restricting element 30 always In reliable efficient running environment, the energy consumption of air-conditioning system is further improved.
In addition, in air-conditioning system of the embodiment of the present invention, by compressor 10, condenser 20, restricting element 30 and evaporator Refrigerant heat exchanger is used in the 40 closed circulation pipelines formed, the anhydrous refrigeration of data center may be implemented, therefore can be preferable Solution air-conditioning system seepy question, to promote the reliability of air-conditioning system.
In embodiments of the present invention, controller is specifically used for:
When condensing pressure at compressor 10 is not less than the first condensing pressure threshold value, it is cold to determine that compressor 10 is in response The control model of solidifying pressure, and the output revolving speed for controlling compressor 10 reduces；
Condensing pressure at compressor 10 is less than the first condensing pressure threshold value and the first output revolving speed of compressor 10 It when greater than refrigeration demand revolving speed, determines that compressor 10 is in the control model of response refrigeration demand, and controls compressor 10 to make Cold demand rotary speed working.
That is, compressor 10 enter or exit response condensing pressure control model not only using condensing pressure as Unique reference parameter, to be conducive to the stable operation of compressor 10.When compressor 10 is in the control of response condensing pressure When mode, the refrigeration demand of air-conditioning system is no longer responded, using condensing pressure as the reference parameter for adjusting its working condition；And work as When compressor 10 is in the control model of response refrigeration demand, compressor 10 is directly controlled with refrigeration demand rotation speed operation, it is this Control logic can be such that compressor 10 is operated in reliable working range always, while can play compressor to the maximum extent Refrigerating capacity, to reduce the energy consumption of air-conditioning system.
Optionally, controller is further used for:
Under conditions of compressor 10 is in the control model of response condensing pressure, the condensing pressure at compressor 10 is small When the second condensing pressure threshold value, the revolving speed of control compressor 10 is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
Compression is worked as under conditions of compressor 10 is in the control model of response condensing pressure using the example scheme When condensing pressure at machine 10 is not less than the first condensing pressure threshold value, the output revolving speed of control compressor 10 is reduced, in compressor After 10 output revolving speed reduces, at this time if condensing pressure value be located at the second condensing pressure threshold value and the first condensing pressure threshold value it Between section in, whether can be greater than refrigeration demand revolving speed to determine whether exiting response according to the current output revolving speed of compressor 10 The control model of condensing pressure, i.e., if the current output revolving speed of compressor 10 is greater than refrigeration demand revolving speed, it is determined that compressor 10 initially enter the control model of response refrigeration demand, control compressor 10 with refrigeration demand rotary speed working；And if compressing After the output revolving speed of machine 10 reduces, when condensing pressure is decreased to less than the second condensing pressure threshold value, then need to control compressor 10 Revolving speed increase so that condensing pressure value is in the section between the second condensing pressure threshold value and the first condensing pressure threshold value, Judge whether the current output revolving speed of compressor 10 is greater than refrigeration demand revolving speed again at this time, and then determines control locating for compressor 10 Molding formula adjusts the working condition of compressor 10.As it can be seen that the example scheme provides one for the reference limit value of condensing pressure Safe return difference is conducive to the stable operation of air-conditioning system so as to avoid adjusting the control model of compressor 10 repeatedly.
In embodiments of the present invention, controller is specifically used for:
When evaporating temperature at compressor 10 is not less than the first evaporating temperature threshold value, determine that restricting element 30 is in response The control model of evaporating temperature, the aperture for controlling restricting element reduce；
Evaporating temperature at compressor 10 is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat When, determine that restricting element 30 is in the control model of the response degree of superheat, according to the degree of superheat and degree of superheat threshold value, adjustment throttling member The aperture of part 30.
Similarly, restricting element 30 enters or exits the control model of response evaporating temperature not only using evaporating temperature as only One reference parameter no longer responds the degree of superheat of empty set system when restricting element 30 is in the control model of response evaporating temperature, Using evaporating temperature as the reference parameter for adjusting its working condition；And when restricting element 30 is in the control model of the response degree of superheat When, it is necessary to adjust the aperture of restricting element 30 according to the degree of superheat and degree of superheat threshold value, this control logic equally can be with Ensure the operation of air-conditioning system stability and high efficiency.
Optionally, controller is further used for:
Evaporating temperature under conditions of restricting element 30 is in the control model of response evaporating temperature, at compressor 10 When less than the second evaporating temperature threshold value, the aperture of control restricting element 30 increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Pressure is worked as under conditions of restricting element 30 is in the control model of response evaporating temperature using the example scheme When evaporating temperature at contracting machine 10 is not less than the first evaporating temperature threshold value, the aperture of control restricting element 30 reduces, at this time if Evaporating temperature value, can be according to air-conditioning system in the section between the second evaporating temperature threshold value and the first evaporating temperature threshold value Whether the degree of superheat is less than degree of superheat threshold value to determine whether exiting the control model of response evaporating temperature, i.e., if air-conditioning system The degree of superheat is less than degree of superheat threshold value, it is determined that restricting element 30 initially enters the control model of the response degree of superheat, according to the degree of superheat And degree of superheat threshold value adjusts the aperture of restricting element；And if evaporating temperature subtracts after the aperture of restricting element 30 reduces When small to less than the second evaporating temperature threshold value, then the aperture for needing to control restricting element 30 increases, so that evaporating temperature value is located at In section between second evaporating temperature threshold value and the first evaporating temperature threshold value, judge again at this time air-conditioning system the degree of superheat whether It less than degree of superheat threshold value, and then determines control model locating for restricting element 30, adjusts the working condition of restricting element 30.It can See, which provides a safe return difference for the reference limit value of evaporating temperature, so as to avoid adjusting section repeatedly The control model of fluid element 30 is conducive to the stable operation of air-conditioning system.
As shown in Fig. 2, air-conditioning system further includes oil eliminator 50 and concatenated solenoid valve 51 and capillary 52, oil separation The air inlet of device 50 is connect with the outlet of compressor 10, and gas outlet is connect with the entrance of condenser 20, oil eliminator 50 it is fuel-displaced The solenoid valve 51 and capillary 52 that mouth is concatenated are connect with the entrance of compressor 10；Controller is also connect with solenoid valve, is used for:
In first time period, control solenoid valve 51 is closed；
In second time period, control solenoid valve 51 is opened, and controls compressor 10 with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
The lubricating oil discharge rate of compressor 10 is related with its revolving speed.For varying capacity or frequency-changeable compressor, revolving speed Refrigeration dose different then being discharged is also different, therefore the lubrication oil content mixed in refrigerant is also different.For capillary 52 Speech, the oil mass passed through the i.e. recirculating oil quantity of air-conditioning system is related with the length of capillary 52, and the length of capillary 52 is longer, resistance Bigger, the recirculating oil quantity by capillary 52 is fewer；Conversely, the length of capillary 52 is shorter, resistance is smaller, passes through capillary 52 Recirculating oil quantity it is more.Therefore by setting suitable 10 revolving speed of compressor and 52 length of suitable capillary, can make It is suitable with the content of lubricating oil being discharged from compressor 10 by the recirculating oil quantity of capillary 52, to enable air-conditioning system can By oil return.Such as in embodiments of the present invention, it when compressor 10 is with the second output rotation speed operation, is discharged from compressor 10 The content of lubricating oil is suitable with the oil mass that selected capillary 52 can pass through, and ensures that being close to for air-conditioning system at this time Oil.It should be noted that compressor 10 second exports a certain revolving speed that revolving speed is less than 10 maximum speed of compressor, with compressor 10 first output revolving speeds or refrigeration demand revolving speed are different, and compressor 10 second exports revolving speed is not joined with the operating status of air-conditioning system Number is used as determination basis, and its essence is a fixed numbers, and the fixed numbers are only and capillary used in air-conditioning system The size of pipe 52 is related.
In addition, in embodiments of the present invention, first time period is substantially the period that air-conditioning system works in refrigeration mode, In the period, the operating status of air-conditioning system can be adjusted according to control logic in any of the preceding embodiments；And second time period Essence is the period that air-conditioning system works in oil return mode to ignore aforementioned control logic within the period, i.e., no longer responds air-conditioning Any running state parameter of system only need to control compressor 10 to guarantee that air-conditioning system is capable of the second output turn of reliable oil return Speed work.
Using the example scheme, in the first time period that solenoid valve 51 is closed, air-conditioning system works in refrigeration mode, The working condition that modules can be adjusted in real time according to the running state parameter of air-conditioning system at this time, transports modules always Row is in reliable working range, to achieve the purpose that reduce the energy consumption of air-conditioning system to greatest extent；It is opened in solenoid valve 51 In second time period, air-conditioning system works in oil return mode, and the lubricating oil mixed in refrigerant can be at the bottom of oil eliminator 50 Portion's deposition, and compressor 10 is returned to by capillary 52, enable the reliable oil return of air-conditioning system, ensure that the reliable of compressor 10 Operating.
In addition, refrigeration system can be divided into cold and hot channel opener formula and cold and hot channel for being applied to data center Closed two kinds.In the refrigeration system of cold and hot channel enclosed formula, closing isolation is done in the air draught side of server cabinet and air side Design, the control of temperature and humidity is mainly for air draught side, so that it is guaranteed that server cabinet work is safe and reliable.However, if system Some air-conditioning system disorderly closedown of cooling system, if determining the refrigeration demand of data center according to the return air temperature in the passage of heat, Then necessarily cause the blower being arranged at the evaporator of air-conditioning system that can operate with higher speed, it is direct so as to cause a large amount of hot wind It is bypassed to cold passage, influences the safe operation of server cabinet.
In embodiments of the present invention, air-conditioning system further includes going out wind information for detect blower be arranged at evaporator Wind pressure monitoring module, controller are further connect with the wind pressure monitoring module, for when air-conditioning system breaks down, according to steaming That sends out blower be arranged at device goes out wind information, determine the blower for inhibiting the minimum rotation speed of fan of cold airflow refluence, and control It makes the blower and works in minimum rotation speed of fan.In this way, heat-sealing can be prevented to be bypassed to cold passage, to ensure the safety fortune of cabinet Row, with can prevent cold airflow from flowing backward in air-conditioning system, thus prevent cooling capacity from wasting, energy saving.
Wherein, the blower being arranged at evaporator can use EC (Electrical Commutation) blower, have The advantages that small, high-efficient, power factor is high, good speed adjustment features, control simple, at low cost is lost.
As shown in figure 4, being based on identical inventive concept, the embodiment of the invention also provides a kind of operation controls of air-conditioning system Method processed, comprising:
Step 101 obtains the first return air temperature, determines the first refrigeration demand according to the first return air temperature；According to the first system Cold demand adjusts the first output revolving speed of compressor；
Step 102 exports revolving speed, and the indoor return air prestored according to the first of indoor first return air temperature and compressor Temperature, compressor output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine evaporator place First rotation speed of fan of blower is set, controls the blower and is worked with the first rotation speed of fan；
Step 103, according to the suction temperature and evaporating pressure at compressor, determine the degree of superheat of air-conditioning system, Yi Jigen Evaporating temperature is determined according to the evaporating pressure at compressor；According to the degree of superheat and evaporating temperature, determine that restricting element is in response The control model of the degree of superheat or in response evaporating temperature control model, and determine restricting element in locating control model Under working condition；
Step 104, obtain air-conditioning system at compressor and evaporator blower be arranged respectively with first export revolving speed and The work of first rotation speed of fan and restricting element be under identified working condition when working, the condensing pressure at compressor with And second return air temperature；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines compressor Refrigeration demand revolving speed；
Step 105, according to condensing pressure and refrigeration demand revolving speed, determine that compressor is in the control of response condensing pressure Mode or control model in response refrigeration demand, and determine working condition of the compressor under locating control model.
Air-conditioning system uses the progress control method of above-described embodiment, can be real according to the running state parameter of air-conditioning system When adjust modules working condition, operate in modules always in reliable working range, while being capable of maximum limit Degree ground plays the refrigerating capacity of compressor, to reduce the energy consumption of air-conditioning system.
As shown in figure 5, it is optional, according to condensing pressure and refrigeration demand revolving speed, determine that compressor is in response condensation The control model of pressure or in response refrigeration demand control model, and determine compressor under locating control model Working condition, comprising:
When step 1051, the condensing pressure at compressor are not less than the first condensing pressure threshold value, determine that compressor is in The control model of condensing pressure is responded, and the output revolving speed for controlling compressor reduces；
Step 1052, the condensing pressure at compressor are first defeated less than the first condensing pressure threshold value and compressor Out revolving speed be greater than refrigeration demand revolving speed when, determine compressor be in response refrigeration demand control model, and control compressor with Refrigeration demand rotary speed working.
Optionally, the progress control method of air-conditioning system further include:
Step 1053, condensation under conditions of compressor is in the control model of response condensing pressure, at compressor When pressure is less than the second condensing pressure threshold value, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
As shown in fig. 6, it is optional, according to the degree of superheat and evaporating temperature, determine that restricting element is in the response degree of superheat Control model or control model in response evaporating temperature, and determine work of the restricting element under locating control model State, comprising:
When step 1031, the evaporating temperature at compressor are not less than the first evaporating temperature threshold value, determine at restricting element In the control model of response evaporating temperature, the aperture that control restricting element starts reduces；
Step 1032, the evaporating temperature at compressor are less than overheat less than the first evaporating temperature threshold value and the degree of superheat When spending threshold value, determine that restricting element is in the control model of the response degree of superheat, according to the degree of superheat and degree of superheat threshold value, adjustment section The aperture of fluid element.
Optionally, the progress control method of air-conditioning system further include:
Step 1033, steaming under conditions of restricting element is in the control model of response evaporating temperature, at compressor When sending out temperature less than the second evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Optionally, air-conditioning system further includes oil eliminator and concatenated solenoid valve and capillary, the air inlet of oil eliminator Mouth is connect with the outlet of compressor, the entrance connection of gas outlet and condenser, the solenoid valve that the oil outlet of oil eliminator is concatenated It is connected with the entrance of capillary and compressor；Method further include:
Step 106, in first time period, control solenoid valve close；
Step 107, in second time period, control solenoid valve open, and control compressor with second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
As shown in fig. 7, being based on identical inventive concept, the embodiment of the invention also provides a kind of operation controls of air-conditioning system Device processed, comprising:
First acquisition unit 100, for obtaining the first return air temperature；
First control unit 200 determines the first refrigeration demand according to the first return air temperature；According to the first refrigeration demand, adjust First output revolving speed of whole compressor；
Second control unit 300, according to the first output revolving speed of indoor first return air temperature and compressor, and prestore Indoor return air temperature, compressor output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine steaming The first rotation speed of fan for sending out blower be arranged at device, is controlled the blower and is worked with the first rotation speed of fan；
First determination unit 400 determines the overheat of air-conditioning system according to the suction temperature and evaporating pressure at compressor Degree, and evaporating temperature is determined according to the evaporating pressure at compressor；According to the degree of superheat and evaporating temperature, restricting element is determined Control model in the response degree of superheat or the control model in response evaporating temperature, and determine restricting element locating Working condition under control model；
Second acquisition unit 500, for obtain air-conditioning system at compressor and evaporator blower be arranged respectively with When one output revolving speed and the work of the first rotation speed of fan and restricting element work under identified working condition, at compressor Condensing pressure and the second return air temperature；
Second determination unit 600, for determining the second refrigeration demand according to the second return air temperature, and according to the second refrigeration need It asks, determines the refrigeration demand revolving speed of compressor；
Third determination unit 700, for it is cold to determine that compressor is in response according to condensing pressure and refrigeration demand revolving speed The control model of pressure or the control model in response refrigeration demand are coagulated, and determines compressor under locating control model Working condition.
It similarly, can be real-time according to the running state parameter of air-conditioning system using the operating control device of above-described embodiment The working condition for adjusting modules, operates in modules always in reliable working range, while can be to greatest extent Ground plays the refrigerating capacity of compressor, to reduce the energy consumption of air-conditioning system.
Optionally, third determination unit 700 is specifically used for:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensation pressure The control model of power, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than less than the first output revolving speed of the first condensing pressure threshold value and compressor It when refrigeration demand revolving speed, determines that compressor is in the control model of response refrigeration demand, and controls compressor and turned with refrigeration demand Speed work.
Optionally, third determination unit 700 is further used for:
Under conditions of compressor is in the control model of response condensing pressure, condensing pressure at compressor is less than the When two condensing pressure threshold values, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
Optionally, the first determination unit 400 is specifically used for:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporation The control model of temperature, the aperture for controlling restricting element reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, Determine that restricting element adjusts restricting element according to the degree of superheat and degree of superheat threshold value in the control model of the response degree of superheat Aperture.
Optionally, the first determination unit 400 is further used for:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than When the second evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
Optionally, air-conditioning system further includes oil eliminator and concatenated solenoid valve and capillary, the air inlet of oil eliminator Mouth is connect with the outlet of compressor, the entrance connection of gas outlet and condenser, the solenoid valve that the oil outlet of oil eliminator is concatenated It is connected with the entrance of capillary and compressor；Device further includes third control unit, is used for:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (22)

1. a kind of air-conditioning system characterized by comprising
Compressor, condenser, restricting element and the evaporator of closed circulation are linked in sequence and formed by pipeline；
Temperature detecting module, for detecting the suction temperature at indoor return air temperature and compressor；
Pressure detecting module, for detecting evaporating pressure and condensing pressure at compressor；
Controller connect with compressor, restricting element, temperature detecting module and pressure detecting module, is used for:
The first return air temperature is obtained, the first refrigeration demand is determined according to the first return air temperature；According to the first refrigeration demand, adjustment pressure First output revolving speed of contracting machine；
According to the first output revolving speed of indoor first return air temperature and compressor, and prestore indoor return air temperature, compressor Output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine the of blower be arranged at evaporator One rotation speed of fan is controlled the blower and is worked with the first rotation speed of fan；
According to the suction temperature and evaporating pressure at compressor, determine the degree of superheat of air-conditioning system, and according to compressor at Evaporating pressure determines evaporating temperature；According to the degree of superheat and evaporating temperature, determine that restricting element is in the control of the response degree of superheat Mode or control model in response evaporating temperature, and determine work shape of the restricting element under locating control model State；
It obtains air-conditioning system blower be arranged at compressor and evaporator and exports revolving speed and the first rotation speed of fan respectively with first Condensing pressure and the second return air temperature when work and restricting element work under identified working condition, at compressor Degree；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines that the refrigeration demand of compressor turns Speed；
According to condensing pressure and refrigeration demand revolving speed, determine that compressor is in the control model of response condensing pressure or is in The control model of refrigeration demand is responded, and determines working condition of the compressor under locating control model.
2. air-conditioning system as described in claim 1, which is characterized in that controller is specifically used for:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensing pressure Control model, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than refrigeration less than the first output revolving speed of the first condensing pressure threshold value and compressor When demand revolving speed, determine that compressor is in the control model of response refrigeration demand, and control compressor with refrigeration demand revolving speed work Make.
3. air-conditioning system as claimed in claim 2, which is characterized in that controller is further used for:
Under conditions of compressor is in the control model of response condensing pressure, the condensing pressure at compressor is cold less than second When solidifying pressure threshold, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
4. air-conditioning system as described in claim 1, which is characterized in that controller is specifically used for:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporating temperature Control model, control restricting element aperture reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, determine The control model that restricting element is in the response degree of superheat adjusts the aperture of restricting element according to the degree of superheat and degree of superheat threshold value.
5. air-conditioning system as claimed in claim 4, which is characterized in that controller is further used for:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than second When evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
6. air-conditioning system as claimed in any one of claims 1 to 5, which is characterized in that further include oil eliminator and concatenated The outlet of solenoid valve and capillary, the air inlet and compressor of oil eliminator connects, and the entrance of gas outlet and condenser connects, oil The entrance for the solenoid valve and capillary and compressor that the oil outlet of separator is concatenated connects；Controller is also connect with solenoid valve, For:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
7. air-conditioning system as described in claim 1, which is characterized in that the quantity at least two of compressor and be arranged in parallel.
8. air-conditioning system as described in claim 1, which is characterized in that condenser is air cooled condenser.
9. air-conditioning system as described in claim 1, which is characterized in that condenser be plate-type condenser or shell and tube condenser, Air-conditioning system further includes cooling tower, and condenser has the refrigerant passage being isolated and water passage, the both ends point of refrigerant passage It is not connect with compressor and restricting element, water passage connect forming circuit with cooling tower.
10. air-conditioning system as described in claim 1, which is characterized in that further include gas-liquid separator, the entrance of gas-liquid separator It is connect respectively with the entrance of the outlet of evaporator and compressor with outlet.
11. a kind of progress control method applied to air-conditioning system described in claim 1 characterized by comprising
The first return air temperature is obtained, the first refrigeration demand is determined according to the first return air temperature；According to the first refrigeration demand, adjustment pressure First output revolving speed of contracting machine；
According to the first output revolving speed of indoor first return air temperature and compressor, and prestore indoor return air temperature, compressor Output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine the of blower be arranged at evaporator One rotation speed of fan is controlled the blower and is worked with the first rotation speed of fan；
According to the suction temperature and evaporating pressure at compressor, determine the degree of superheat of air-conditioning system, and according to compressor at Evaporating pressure determines evaporating temperature；According to the degree of superheat and evaporating temperature, determine that restricting element is in the control of the response degree of superheat Mode or control model in response evaporating temperature, and determine work shape of the restricting element under locating control model State；
It obtains air-conditioning system blower be arranged at compressor and evaporator and exports revolving speed and the first rotation speed of fan respectively with first Condensing pressure and the second return air temperature when work and restricting element work under identified working condition, at compressor Degree；The second refrigeration demand is determined according to the second return air temperature, and according to the second refrigeration demand, determines that the refrigeration demand of compressor turns Speed；
According to condensing pressure and refrigeration demand revolving speed, determine that compressor is in the control model of response condensing pressure or is in The control model of refrigeration demand is responded, and determines working condition of the compressor under locating control model.
12. the progress control method of air-conditioning system as claimed in claim 11, which is characterized in that it is described according to condensing pressure with And refrigeration demand revolving speed, determine that compressor is in the control model of response condensing pressure or the control in response refrigeration demand Mode, and determine working condition of the compressor under locating control model, comprising:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensing pressure Control model, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than refrigeration less than the first output revolving speed of the first condensing pressure threshold value and compressor When demand revolving speed, determine that compressor is in the control model of response refrigeration demand, and control compressor with refrigeration demand revolving speed work Make.
13. the progress control method of air-conditioning system as claimed in claim 12, which is characterized in that the method also includes:
Under conditions of compressor is in the control model of response condensing pressure, the condensing pressure at compressor is cold less than second When solidifying pressure threshold, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
14. the progress control method of air-conditioning system as claimed in claim 11, which is characterized in that it is described according to the degree of superheat and Evaporating temperature determines that restricting element is in the control model of the response degree of superheat or the control model in response evaporating temperature, And determine working condition of the restricting element under locating control model, comprising:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporating temperature Control model, control restricting element aperture reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, determine The control model that restricting element is in the response degree of superheat adjusts the aperture of restricting element according to the degree of superheat and degree of superheat threshold value.
15. the progress control method of air-conditioning system as claimed in claim 14, which is characterized in that the method also includes:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than second When evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
16. such as the progress control method of the described in any item air-conditioning systems of claim 11~15, which is characterized in that air-conditioning system It further include oil eliminator and concatenated solenoid valve and capillary, the outlet of the air inlet and compressor of oil eliminator connects, out The entrance of the connection of the entrance of port and condenser, the solenoid valve and capillary and compressor that the oil outlet of oil eliminator is concatenated connects It connects；The method also includes:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
17. a kind of operating control device applied to air-conditioning system described in claim 1 characterized by comprising
First acquisition unit, for obtaining the first return air temperature；
First control unit determines the first refrigeration demand according to the first return air temperature；According to the first refrigeration demand, compressor is adjusted First output revolving speed；
Second control unit is returned according to the first output revolving speed of indoor first return air temperature and compressor, and the interior prestored Air temperature, compressor output revolving speed and evaporator at blower be arranged revolving speed between corresponding relationship, determine at evaporator First rotation speed of fan of set blower is controlled the blower and is worked with the first rotation speed of fan；
First determination unit determines the degree of superheat of air-conditioning system, Yi Jigen according to the suction temperature and evaporating pressure at compressor Evaporating temperature is determined according to the evaporating pressure at compressor；According to the degree of superheat and evaporating temperature, determine that restricting element is in response The control model of the degree of superheat or in response evaporating temperature control model, and determine restricting element in locating control model Under working condition；
Second acquisition unit is turned respectively with the first output for obtaining air-conditioning system blower be arranged at compressor and evaporator Condensation pressure when speed and the work of the first rotation speed of fan and restricting element work under identified working condition, at compressor Power and the second return air temperature；
Second determination unit for determining the second refrigeration demand according to the second return air temperature, and according to the second refrigeration demand, determines The refrigeration demand revolving speed of compressor；
Third determination unit, for determining that compressor is in response condensing pressure according to condensing pressure and refrigeration demand revolving speed Control model or control model in response refrigeration demand, and determine work of the compressor under locating control model State.
18. the operating control device of air-conditioning system as claimed in claim 17, which is characterized in that the third determination unit tool Body is used for:
When condensing pressure at compressor is not less than the first condensing pressure threshold value, determine that compressor is in response condensing pressure Control model, and the output revolving speed for controlling compressor reduces；
Condensing pressure at compressor is greater than refrigeration less than the first output revolving speed of the first condensing pressure threshold value and compressor When demand revolving speed, determine that compressor is in the control model of response refrigeration demand, and control compressor with refrigeration demand revolving speed work Make.
19. the operating control device of air-conditioning system as claimed in claim 18, which is characterized in that the third determination unit into One step is used for:
Under conditions of compressor is in the control model of response condensing pressure, the condensing pressure at compressor is cold less than second When solidifying pressure threshold, the revolving speed for controlling compressor is increased；
Wherein, the first condensing pressure threshold value is greater than the second condensing pressure threshold value.
20. the operating control device of air-conditioning system as claimed in claim 17, which is characterized in that the first determination unit tool Body is used for:
When evaporating temperature at compressor is not less than the first evaporating temperature threshold value, determine that restricting element is in response evaporating temperature Control model, control restricting element aperture reduce；
When evaporating temperature at compressor is less than degree of superheat threshold value less than the first evaporating temperature threshold value and the degree of superheat, determine The control model that restricting element is in the response degree of superheat adjusts the aperture of restricting element according to the degree of superheat and degree of superheat threshold value.
21. the operating control device of air-conditioning system as claimed in claim 20, which is characterized in that first determination unit into One step is used for:
Under conditions of restricting element is in the control model of response evaporating temperature, the evaporating temperature at compressor is less than second When evaporating temperature threshold value, the aperture for controlling restricting element increases；
Wherein, the first evaporating temperature threshold value is greater than the second evaporating temperature threshold value.
22. such as the operating control device of the described in any item air-conditioning systems of claim 17~21, which is characterized in that air-conditioning system It further include oil eliminator and concatenated solenoid valve and capillary, the outlet of the air inlet and compressor of oil eliminator connects, out The entrance of the connection of the entrance of port and condenser, the solenoid valve and capillary and compressor that the oil outlet of oil eliminator is concatenated connects It connects；Described device further includes third control unit, is used for:
In first time period, control solenoid valve is closed；
In second time period, control solenoid valve is opened, and controls compressor with the second output rotary speed working；
Wherein, first time period and second time period are not overlapped.
CN201810171651.5A 2018-03-01 2018-03-01 Air conditioning system, and operation control method and device of air conditioning system Active CN110220257B (en)

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