CN106051969B - A kind of compound air-conditioning system with natural cooling function - Google Patents

A kind of compound air-conditioning system with natural cooling function Download PDF

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Publication number
CN106051969B
CN106051969B CN201610364806.8A CN201610364806A CN106051969B CN 106051969 B CN106051969 B CN 106051969B CN 201610364806 A CN201610364806 A CN 201610364806A CN 106051969 B CN106051969 B CN 106051969B
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air
heat exchanger
solenoid valve
natural cooling
storage device
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CN106051969A (en
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王铁军
江斌
王景晖
胡力文
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Hefei University of Technology
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Hefei University of Technology
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    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • 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
    • F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
    • 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
    • F24F11/80—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

Abstract

The invention discloses a kind of compound air-conditioning systems with natural cooling function, it is characterized in that its system composition includes：Compressor module, air-cooled heat exchange module, multifunctional accumulator, liquid pump, air treatment module and each control valve being made of heat exchanger assembly and cooling blower, control method are to realize following three kinds of different operating modes by the flow path of operation control valve change refrigeration working medium：Compress the compound-refrigerating operating mode and natural cooling operating mode of refrigeration work pattern, compression refrigeration and natural cooling synthetic operation.The present invention carries out the adjusting of refrigerating capacity using fuzzy control, compression refrigeration is substituted in low temperature or transition season application natural cooling, efficiently utilize natural cooling source, it is particularly suitable for the working environment control of data center, high-performance computer, communication base station and power electronic equipment, the energy consumption and operating cost of air-conditioning system is greatly reduced.

Description

A kind of compound air-conditioning system with natural cooling function
Technical field
The present invention relates to refrigeration and air-conditioning technical fields, and in particular to a kind of composite air conditioner system with natural cooling function System.
Background technology
The fast development of information industry and digital Construction has pushed the quantity of data center module, communication base station, construction scale Rapid growth, according to statistics computer room, base station air conditioner energy consumption account for the 35%~50% of its total energy consumption.Computer room, base station sensible heat load Than big, for the operating ambient temperature for keeping suitable, operation air-conditioning is needed throughout the year, side set temperature is higher than outdoor environment indoors The season of temperature especially still needs to continue in low temperature season or cold district, conventional data center and communication base station air conditioner system Refrigeration compressor is run, refrigeration system energy efficiency is low and easily breaks down, if indoor/outdoor temperature-difference low cost can be utilized to discharge Heat provides cold for indoor, will greatly reduce the energy consumption and operating cost of air-conditioning system.
Using outdoor Cryogenic air scholar in the industry and engineers and technicians have been obtained for the method that indoor provides cold Concern, and expansion technique research and application in different forms, the fresh air system such as used at present, in addition there are various forms of Gas-gas, air-water heat-exchange system, and the composite air conditioner using hot pipe technique.
A kind of assistant energy-saving refrigeration apparatus for machine room is disclosed in Chinese utility model patent ZL200720019537.8, works as room When outer air themperature is relatively low, air-conditioning is stopped, and directly cools down for equipment such as electronic housings by outdoor Cryogenic air is sent to the room, Using natural cooling source, air conditioning energy consumption is reduced.But directly utilize outdoor Cryogenic air for electrical cooling due to cannot ensure interior Air quality can not prevent outdoor dust, moisture etc. and get in, may be damaged to electronic equipment.
A kind of natural cold-energy heat for communication base station is disclosed in Chinese utility model patent ZL201020114596.X Switch, including air heat exchanger, indoor fan, outdoor fan and its babinet.When outdoor temperature is relatively low, by outdoor low temperature Air introduces, and carries out heat exchange with room air, indirect utilization natural cooling source reduces air themperature in base station, reduces base station energy Consumption.Although such gas-gas heat exchange can ensure the quality of room air, for thermic load greatly and temperature uniformity require height Computer room object, the drawback for needing huge heat exchange area to overcome airair heat exchanger heat transfer efficiency low.
A kind of air-cooling thermotube-type machine room air-conditioning system is disclosed in Chinese invention patent CN201010528027.X, this is System has two kinds of operating modes of compression-type refrigeration and heat pipe circularly cooling.When outdoor temperature is higher than set temperature TaWhen, freeze mould Formula works, and the first refrigeration working medium of refrigeration cycle evaporation endothermic in evaporative condenser is participated in, for cooling down and condensing the second system Cold working medium；When outdoor temperature is less than TaWhen, system is converted to heat pipe circularly cooling pattern, is made using outdoor Cryogenic air pair second Cold working medium is cooled down and is condensed, and compression-type refrigeration cycle is stopped, to effectively reduce annual air conditioning energy consumption.This system exists The deficiency of first two system, but compression-type refrigeration are compensated for using outdoor Cryogenic air cold and in terms of ensuring indoor air quality Switch in a certain temperature spot with two kinds of operating modes of heat pipe circularly cooling, in order to ensure hot-pipe system has enough refrigerating capacitys, The set temperature T of conversion operating mode must be reduceda, so that the natural cooling source in section transitions season can not be utilized；For holding The air-conditioning system of row GB/T 19413-2010, since indoor set temperature is 24 DEG C, compression refrigeration is transformed into heat pipe cycle system Cold outdoor environment temperature must be very low, and the utilization rate of natural cooling source is low.
Chinese utility model patent ZL01278831.7 discloses a kind of energy-saving refrigeration cycling devices with circulating pump, In heat pipe circulatory system using circulating pump be conducive to improve heat pipe cycle working efficiency, also eliminate hot-pipe system installation when pair The requirement of condenser potential difference opposite with evaporator, but its deficiency in terms of using natural cooling source is special with CN201010528027.X Profit is similar, that is, the ceiling temperature of heat pipe cycle operation relatively low could must steadily be connected with compression refrigeration cycle.
Chinese invention patent ZL201210037082.8 discloses a kind of computer room heat pipe air conditioner system and its control method, The invention, by separate heat pipe module and compression refrigeration module coupling, has compression refrigeration, compound-refrigerating by condenser/evaporator With three kinds of operating modes of heat-pipe refrigerating, secondary heat exchange is completed in condenser/evaporator, it is cold to being conveyed with cold side by secondary refrigerant Amount, disadvantage：First, there are the losses of larger irreversible heat transfer for secondary heat exchange；Second is that needing to increase a condenser/evaporator, such as Shell and tube exchanger or several plate heat exchangers；Third, needing secondary refrigerant.This not only lowers efficiency, improves and be manufactured into This, and it is added to difficulty to the structure of unit arrangement and manufacturing process.
The promotion of the informationization technologies such as big data, cloud computing development, Large-scale Data Rooms area have developed to thousands of~number 100000 square metres, unit area heat flow density is doubled and redoubled, and produces to more powerful air-conditioning system and its more flexible group Close the needs with control mode.
Invention content
The present invention is provided a kind of with natural cooling function to avoid above-mentioned existing deficiencies in the technology Compound air-conditioning system, to avoid computer-room air conditioning system, in low temperature season, there is still a need for high energy consumptions caused by operation compression refrigeration And the deficiencies of reliability, the efficiency of data center's air-conditioning system is improved, meets the air conditioning requirements of Various types of data computer room, and solve sky The refrigerating capacity of adjusting system adjusts and the problems such as energy hole, efficiently utilizes natural cooling source, the scale of realization composite air conditioner product, High efficiency production and application.
The present invention is to solve technical problem to adopt the following technical scheme that：
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is：
The composition of the air-conditioning system includes：Compressor module air-cooled is changed by what heat exchanger assembly and cooling blower were constituted Thermal modules, liquid storage device, liquid pump, air treatment module and each control valve change the flowing of refrigeration working medium by operation control valve Realize following three kinds of different operating modes in path：Compress refrigeration work pattern, compression refrigeration and natural cooling synthetic operation Compound-refrigerating operating mode and natural cooling operating mode；The outlet of the compressor module is divided into two-way, the wherein first via It is directly connected to the arrival end of the first air-cooled heat exchanger fin in heat exchanger assembly, the second tunnel is by the first solenoid valve and heat exchanger group The arrival end of the second air-cooled heat exchanger fin in part connects；The outlet end of the first air-cooled heat exchanger fin passes through the first electric expansion valve It is connected to collector, second solenoid valve is connected in parallel at the both ends of first electric expansion valve；The second air-cooled heat exchanger fin goes out Mouth end is connected to collector by the second electric expansion valve, and third solenoid valve is connected in parallel at the both ends of second electric expansion valve； The collector is connected to the first import of liquid storage device, and the external-connected port of the " u "-shaped pipe in liquid storage device is connected to compressor module Suction end, the supply opening of liquid storage device are connected to the arrival end of air treatment module by general piping for liquids, and the liquid pump is arranged in institute It states in general piping for liquids；It is connected to the return header in the outlet end of air treatment module and is connected to liquid storage device through the 4th solenoid valve all the way Second import, another way are connected to the arrival end of the second air-cooled heat exchanger fin through the 5th solenoid valve；
The compression refrigeration work pattern is：The refrigerating capacity of air-conditioning system all carries out compression system by operation compressor module It is cold to be provided, realize that refrigerating capacity is adjusted by the load or off-load that execute compressor module；
The operating mode of the natural cooling is：Compressor module is out of service, and the refrigerating capacity of air-conditioning system is all by transporting Row natural cooling is provided, and realizes that refrigerating capacity is adjusted by the load or off-load that execute the rotating speed of cooling blower；
The compound-refrigerating operating mode is：It is preferentially run with the operating mode of natural cooling, insufficient cold is by pressing The compression refrigeration of contracting machine module is supplemented, and the adjusting of refrigerating capacity is realized by the load or off-load that execute compressor module； When air-conditioning thermic load is less than the cold that natural cooling is provided, compressor module is out of service, and is switched to by executing cooling The load of the rotating speed of wind turbine or off-load realize that refrigerating capacity is adjusted.
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is lain also in：For freezing in air-conditioning system Measure Q0It is adjusted using fuzzy control rule, the fuzzy control rule is using the temperature of refrigeration working medium in liquid storage device as target Parameter executes load or the off-load of compressor module, and adding for the rotating speed of cooling blower is executed when whole refrigeration compressors are shut down Load or off-load, to adjust the refrigerating capacity Q of air-conditioning system0, accurately control the temperature of refrigeration working medium in liquid storage device；
It enables：TR is the set temperature of refrigeration working medium in liquid storage device；
T is the measuring temperature of refrigeration working medium in real-time detected liquid storage device；
Then have：Temperature deviation Δ T is：Δ T=(T-TR)；
Setting：Temperature deviation Δ T is five grades, is followed successively by from big to small by measuring temperature T：Honest, center, zero, it is negative In, it is negative big；
Setting：The change rate d Δs T/dt of the measuring temperature T is followed successively by from big to small by temperature deviation Δ T：It is honest, just In, zero, it is negative in, it is negative big；
The refrigerating capacity Q of air-conditioning system is realized by the load or off-load that control compressor module or wind turbine0Adjusting, setting Regulated quantity U by being followed successively by from big to small：Honest, center, zero, it is negative in, it is negative big；
Fuzzy rule is established, by measuring Δ T, calculating d Δ T/dt, is calculated through blurring, and blurring result of calculation It is converted into precise volume, compressor module is controlled or wind turbine executes load or off-load, accurately control the temperature of refrigeration working medium in liquid storage device Degree.
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is lain also in：Three kinds of different work Pattern presses following policy setting：
In TaUnder the operating mode of >=A2, compression refrigeration work pattern is operated to；
In A2 ＞ TaUnder the operating mode of ＞ A1, compound-refrigerating operating mode is operated to；
In TaUnder the operating mode of≤A1, natural cooling operating mode is operated to；
Wherein：TaFor outdoor environment temperature measured value, A1, A2 are set temperature, and A2 ＞ A1.
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is lain also in：The compression refrigeration work is set The circulation loop of operation mode is：4th solenoid valve and the first solenoid valve are conducting, the 5th solenoid valve, second solenoid valve and the Three solenoid valves are turned off, and the liquid working substance in liquid storage device provides power by liquid pump and exported from supply opening, is entered by general piping for liquids Air treatment module, the heat absorption working medium exported in air treatment module return to liquid storage device through return header and the 4th solenoid valve, The top gaseous working medium of liquid storage device enters compressor module by " u "-shaped pipe, the high pressure-temperature gaseous state being discharged in compressor module It is high-pressure liquid working medium that working medium shunts the exothermic condensation in the first air-cooled heat exchanger fin and the second air-cooled heat exchanger fin by the first solenoid valve, The high-pressure liquid working medium passes through the first electric expansion valve and the second electric expansion valve reducing pressure by regulating flow respectively becomes low-pressure low-temperature liquid Body, and liquid storage device is returned to by collector；
The circulation loop that the natural cooling operating mode is arranged is：5th solenoid valve, the first solenoid valve, second solenoid valve It is conducting with third solenoid valve, the 4th solenoid valve is to close, and the liquid working substance in liquid storage device provides power from feed flow by liquid pump Mouth output, enters air treatment module, the heat absorption working medium exported in air treatment module is by return header by general piping for liquids Through the 5th solenoid valve, then shunted by the first solenoid valve, the exothermic condensation in the first air-cooled heat exchanger fin and the second air-cooled heat exchanger fin For liquid refrigerant, the liquid refrigerant enters collector by second solenoid valve and third solenoid valve respectively and returns to liquid storage device；
The circulation loop that the compound-refrigerating operating mode is arranged is：5th solenoid valve and third solenoid valve conduction, the 4th Solenoid valve, the first solenoid valve and second solenoid valve are turned off, and the liquid working substance in liquid storage device provides power from supply opening by liquid pump Output, enters air treatment module, the working medium of the heat absorption exported in air treatment module is through return header by general piping for liquids Enter the second air-cooled heat exchanger fin with the 5th solenoid valve, the working medium in the described second air-cooled heat exchanger fin after heat release is through third electromagnetism Valve, and liquid storage device is returned to by collector；Meanwhile the gaseous working medium on liquid storage device top enters compressor module by " u "-shaped pipe, pressure The high pressure-temperature gaseous working medium being discharged in contracting machine module enters the first air-cooled heat exchanger fin, and through the first air-cooled heat exchanger fin exothermic condensation For high-pressure liquid working medium, the high-pressure liquid working medium becomes low pressure, low temperature liquid by the first electric expansion valve reducing pressure by regulating flow, and Liquid storage device is returned by collector.
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is lain also in：The first air-cooled heat exchanger fin With the heat exchanger that the second air-cooled heat exchanger fin is same type, including pipe type or parallel flow heat exchanger；It is changed in face of what wind direction was arranged Hot device assembly is parallel by the first air-cooled heat exchanger fin and the second air-cooled heat exchanger fin and constitutes side by side, wherein the first air-cooled heat exchanger fin Positioned at air side, the second air-cooled heat exchanger fin is located at inlet side；In the air-cooled heat exchange module, two groups of symmetrical arrangements Heat exchanger assembly air side arrange a shared cooling blower, the cooling blower be DC frequency-changing wind turbine, or for The step speed regulation wind turbine of top gear, mid ranger, low or first gear and lock catch.
The present invention has the characteristics that the compound air-conditioning system of natural cooling function is lain also in：The air treatment module is It being made of evaporator, evaporation fan and flow control valve, the import of the evaporator in each air treatment module connects general piping for liquids, The outlet of the evaporator of each air treatment module is connected to return header；Entering in the evaporator is arranged in the flow control valve Mouth end, the temperature-sensing element of the flow control valve are mounted on the tube wall of the outlet end of the evaporator；The flow control valve For ratio adjusting valve, the refrigerant temperature signal of evaporator outlet is converted into pressure signal using temperature-sensing element, and pass through capillary Pipe transmits the aperture that pressure signal adjusts flow control valve, to control the liquid supply rate of evaporator.
Compressor in heretofore described compressor module is one or is two parallel combinations；It is used for compressor Type be the vortex for needing lubricating oil to be lubricated, screw or centrifugal compressor compressor module, in the pressure Oil eliminator and check valve are sequentially connected in series in the export pipeline of contracting machine, the oil return that the oil eliminator is equipped with connection compressor is logical Pressure drop capillary tube is arranged in the drainback passage in road；In the liquid storage device, it is located at the lower part " u "-shaped elbow of " u "-shaped pipe Oil-sucking hole is provided on side wall, the quantity and diameter of the oil-sucking hole are determined according to compressor displacement and type；For compression The type that machine uses is arranged for the compressor module of electromagnetic levitation type non lubricant oil compressor in the export pipeline of the compressor Check valve.
Compared with the prior art, the present invention has the beneficial effect that：
1, the present invention is integrated applies steam compression type refrigerating and natural cooling technology, according to outdoor environment temperature and air-conditioning Hot load state switches refrigerant flow circuits, adjusts air-conditioning system refrigerating capacity, realizes compression refrigeration, compression refrigeration and natural cooling Three kinds of compound-refrigerating of synthetic operation, natural cooling different operating modes.The applications expanding of compound-refrigerating natural cooling Operation temperature area, avoid indoor/outdoor temperature-difference it is smaller when due to the refrigeratory capacity of natural cooling is insufficient and must single operation compression make Cold, the operation temperature area of natural cooling is set to the temperature in computer room and the weather conditions in user location are related, accounts for about annual total The 1/3~4/5 of time, the development and application of natural cooling technology is to pushing the energy saving of full range air-conditionings such as data center to subtract Row has important meaning.
2, the present invention cools down in compression cooling condition and compound-refrigerating operating mode by reducing pressure by regulating flow is passed through in compression refrigerating system Refrigeration working medium be directly injected into liquid storage device, mixed and conducted heat with refrigeration working medium in liquid storage device, using fuzzy control technology The refrigerating capacity for adjusting air-conditioning system, the thermal parameter for accurately controlling refrigeration working medium in liquid storage device are stablized in setting value.With existing skill Patent of invention ZL201210037082.8 in art is compared, and there is no secondary heat exchange losses by the present invention, and are omitted for secondary The evaporative condenser of heat exchange, the thermal efficiency and reliability that improve system while, reduce manufacturing cost.
3, air-cooled heat exchange module is made of two groups of heat exchanger assemblies and a shared cooling blower in present system, every group Heat exchanger assembly is made of the air-cooled heat exchanger fin of two panels, and the air-cooled heat exchanger fin for being in inlet side is used as compression in the case where compressing cooling condition The condenser of refrigeration system, in the air cooling heat exchanger part of compound-refrigerating and natural cooling operating mode as natural cooling；It is in outlet air Condenser of the air-cooled heat exchanger fin of side under compression refrigeration and complex conditions as compression refrigerating system, only in natural cooling operating mode Air cooling heat exchanger part as natural cooling.When compressing refrigeration work pattern, the air-cooled heat exchanger fin of two panels is all used as condenser, changes Hot area is big；Under compound-refrigerating operating mode, air cooling heat exchanger and pressure of the air-cooled heat exchanger fin of two panels respectively as natural cooling The cold condenser of contraction, the big and effect due to natural cooling of heat transfer temperature difference at this time is so that the refrigeration capacity requirement of compression refrigeration subtracts It is small；Under natural cooling operating mode, the air-cooled heat exchanger fin of two panels is all as the air cooling heat exchanger part of natural cooling, heat exchange area Greatly, natural cooling substitutes compression refrigeration completely, energy-efficient；The invention enables every air-cooled heat exchanger fins all to obtain under different operating modes To efficient application, modularized design is greatly beneficial to improve production efficiency and product quality.
4, condenser is the critical component for compressing cooling cycle system, and function is cooling, condensation and supercooling high temperature and pressure Refrigerant.Reduce in the demand of transition season compression refrigeration, heat transfer temperature difference increases, and unit area exchange capability of heat improves, and reduces it Heat exchange area is conducive to the Proper Match for compressing refrigeration cycle parameter；Natural cooling operating mode is only in outdoor is, low temperature It just works under environment, realizes that the application of natural cooling source is the key that the present invention generates significantly energy-saving effect, increase natural cooling Heat exchanger area can promote energy-saving effect；It is arranged in inlet side in the air cooling heat exchanger of compound-refrigerating operating mode, natural cooling, carries The high refrigeratory capacity of natural cooling, the Air Temperature through the heating of inlet side heat exchanger, which rises, is less than 10 DEG C, to compressing the height of refrigeration cycle Effect operation and reliability have positive effect.
5, the present invention setting low-pressure oil storage, compression refrigeration and compound-refrigerating operating mode by adjust compressor discharge capacity and The throttling action of electric expansion valve accurately controls liquid storage in natural cooling operating mode by the exchange capability of heat of adjusting air cooling heat exchanger The thermal parameter of refrigeration working medium in device；Using the low-pressure oil storage of large volume, thermal capacity is big, and stability is good, and degree of regulation is high, Response air-conditioning thermic load is frequent, wide cut changes.
6, the present invention uses liquid pump conveying refrigeration working medium to recycle cooling for indoor, and power cycle reliability is high, is not pacified Holding position limits；Refrigeration working medium carries out phase-change heat-exchange in release end of heat and heat absorbing end, and heat transfer coefficient is big, heat exchange efficiency is high, indoor and outdoor Side heat exchanger structure is compact, avoids, heat exchanger area huge problem low using gas-gas or air-water heat exchanger heat transfer efficiency, And refrigeration working medium circular flow is small, and conveying work(is small；Using liquid pump forced circulation, flow-rate adjustment is convenient, accurate, and liquid pump pressure head can Best match is carried out according to feed flow distance, drop and system resistance, is conducive to the accurate control of air-conditioner temperature.
7, the present invention uses fuzzy control technology, using the temperature T of refrigeration working medium in liquid storage device as target component, with air-conditioning system The refrigerating capacity of system is regulated quantity, is added by controlling load or the off-load of compressor module, or by controlling outdoor fan rotating speed Load or off-load, accurately control the temperature of refrigeration working medium；For postponing refrigeration working medium temperature T in larger liquid storage device, not only with Its temperature deviation, and using the change rate of its temperature, using fuzzy control technology, to respond the frequent, wide of air-conditioning thermic load Amplitude wave is dynamic, realizes the accurate control of air-conditioning object temperature.
Description of the drawings
Fig. 1 is that present system constitutes schematic diagram；
Fig. 2 a are the block diagram of the compressor module using a refrigeration compressor in the present invention；
Fig. 2 b are the block diagram of the compressor module using two refrigeration compressors in the present invention；
Fig. 3 a are the air-cooled heat exchange module main structure diagram of v-shaped structure in the present invention；
Fig. 3 b are the air-cooled heat exchange module main structure diagram of rectangular configuration in the present invention；
Fig. 4 is apparatus for treating indoor air block diagram in the present invention；
Fig. 5 is the structural schematic diagram of liquid storage device in the present invention；
Fig. 6 is that compound air-conditioning system energy adjustment of the present invention plans schematic diagram；
Fig. 7 is the Fuzzy control system structure principle chart of the present invention.
Figure label：1 compressor module, 101 compressors, 102 oil eliminators, 103 check valves, 104 pressure drop capillary tubes, 2 First solenoid valve, 3 air-cooled heat exchange modules, 31 first air-cooled heat exchanger fins, 32 second air-cooled heat exchanger fins, 33 heat exchanger assemblies, 34 is cold But wind turbine, 4 second solenoid valves, 5 first electric expansion valves, 6 third solenoid valves, 7 second electric expansion valves, 8 collectors, 9 liquid storage devices, 91 supply openings, 92 second imports, 93 first imports, 94 " u "-shaped pipes, 95 oil-sucking holes, 10 liquid pumps, 11 general piping for liquids, at 12 air Reason module, 121 evaporators, 122 evaporation fans, 123 flow control valves, 124 capillaries, 125 temperature-sensing elements, 13 return headers, 14 the 4th solenoid valves, 15 the 5th solenoid valves.
Specific implementation mode
Referring to Fig. 1, the composition of the compound air-conditioning system with natural cooling function includes in the present embodiment：Compressor mould Block 1, the air-cooled heat exchange module 3 being made of heat exchanger assembly 33 and cooling blower 34, liquid storage device 9, liquid pump 10, air treatment module 12 and each control valve, the flow path for changing refrigeration working medium by operation control valve realizes following three kinds of different Working moulds Formula：Compress the compound-refrigerating operating mode and natural cooling of refrigeration work pattern, compression refrigeration and natural cooling synthetic operation Operating mode.
Shown in Fig. 1, the outlet of compressor module 1 is divided into two-way, and the wherein first via is directly connected in heat exchanger assembly 33 The arrival end of first air-cooled heat exchanger fin 31, the second tunnel be by the first solenoid valve 2 with second in heat exchanger assembly 33 is air-cooled changes The arrival end of backing 32 connects.The outlet end of first air-cooled heat exchanger fin 31 is connected to collector 8 by the first electric expansion valve 5, the The both ends of one electric expansion valve 5 are connected in parallel second solenoid valve 4；The outlet end of second air-cooled heat exchanger fin 32 is swollen by the second electronics Swollen valve 7 is connected to collector 8, and third solenoid valve 6 is connected in parallel at the both ends of the second electric expansion valve 7；Collector 8 is connected to liquid storage device 9 The first import 93, the external-connected port of the " u "-shaped pipe 94 in liquid storage device 9 is connected to the suction end of compressor module 1, liquid storage device 9 Supply opening 91 arrival end of air treatment module 12 is connected to by general piping for liquids 11, liquid pump 10 is arranged in general piping for liquids 11 On；It is connected to 13 1 tunnel of return header the 4th solenoid valve 14 in the outlet end of air treatment module 12 is connected to liquid storage device 9 the Two imports 92, another way are connected to the arrival end of the second air-cooled heat exchanger fin 32 through the 5th solenoid valve 15.
Compressor 101 in the present embodiment in compressor module 1 can be one as shown in Figure 2 a, single compressor 101 Using frequency conversion or variable compressor, the discharge directions setting oil eliminator 102 and check valve 103 of compressor 101, oil eliminator The drainback passage of 102 lower parts is connected to the oil sump or air intake duct of compressor, and pressure drop capillary tube 104, dimension are equipped in drainback passage Hold the pressure difference of compressor suction and discharge；Or be two parallel combinations as shown in Figure 2 b, double-compressor 101 includes double frequency conversions or one Two kinds of combinations of a frequency conversion and a fixed frequency, are beneficial to realize the accurate adjusting of refrigerating capacity using frequency conversion or variable compressor, with Respond frequent, the wide-amplitude fluctuation of air-conditioning thermic load；Double compressor system is beneficial to improve the work effect of sub-load compressor Rate；The type used for compressor 101 is the vortex, screw or the centrifugal compressor that need lubricating oil to be lubricated Compressor module 1 is sequentially connected in series oil eliminator 102 and check valve 103, oil eliminator 102 in the export pipeline of compressor 101 Pressure drop capillary tube 104 is arranged in drainback passage equipped with connection compressor in drainback passage, in liquid storage device 9, is located at " u "-shaped Oil-sucking hole 95 is provided on the side wall of the lower part " u "-shaped elbow of pipe 94, the quantity and diameter of oil-sucking hole 95 are according to compressor displacement It is determined with type；The type used for compressor 101 is the compressor module 1 of electromagnetic levitation type non lubricant oil compressor, then Oil eliminator 102 and its drainback passage are not configured, and check valve 103, liquid storage device are set directly in the export pipeline of compressor 101 Oil-sucking hole 95 is not set on 9 U-tube 94.
As shown in Fig. 1, Fig. 3 a and Fig. 3 b, the first air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 are same in the present embodiment The heat exchanger of type, including pipe type or parallel flow heat exchanger；The heat exchanger assembly 33 arranged in face of wind direction is by the first wind Cold heat exchanger fin 31 is parallel with the second air-cooled heat exchanger fin 32 and composition arranged side by side, wherein and the first air-cooled heat exchanger fin 31 is located at air side, and Two air-cooled heat exchanger fins 32 are located at inlet side；In air-cooled heat exchange module 3, the heat exchanger assembly 33 of two groups of symmetrical arrangements exists Air side arranges that a shared cooling blower 34, cooling blower 34 are DC frequency-changing wind turbine, or for top gear, middling speed The step speed regulation wind turbine of shelves, low or first gear and lock catch is conducive to the essence of refrigerating capacity in air-conditioning system operation using adjustable speed fan It really adjusts, and energy saving.
Fig. 3 a show two groups of 33 V-shaped arrangements of heat exchanger assembly, and it is parallel that Fig. 3 b show two groups of heat exchanger assemblies 33 Uprightly；The first air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 in heat exchanger assembly 33 undertake different work(in different operating modes Can, the second air-cooled heat exchanger fin 32 of inlet side compression cooling condition as compression refrigeration cycle condenser, compound-refrigerating with The air cooling heat exchanger that natural cooling operating mode is recycled as natural cooling；The first air-cooled heat exchanger fin 31 of air side is in compression refrigeration and again Operating mode is closed as the condenser all as compression refrigeration cycle, in the air-cooled heat exchange that natural cooling operating mode is recycled as natural cooling Device.
When compressing refrigeration work pattern, the first air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 are all as compression refrigeration The condenser of cycle, heat exchange area are big；In compound-refrigerating operating mode, the first air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 air cooling heat exchangers recycled respectively as the condenser and natural cooling of compression refrigeration cycle, at this time since natural cooling exports Refrigeratory capacity reduces the refrigeration capacity requirement to compression refrigeration, while the heat transfer temperature difference for compressing condenser in refrigeration cycle increases, more The reduction for having mended heat transfer area is conducive to the Proper Match for compressing refrigeration cycle parameter；In natural cooling operating mode, first The air cooling heat exchanger of air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 all as natural cooling cycle, heat exchange area is big, natural Cooling substitute completely compresses refrigeration, energy-efficient.This structure type makes the first air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32 are all rationally applied in various operating modes, not only reduce manufacturing cost, and make the structure of air-conditioning system more compact, Modularized design is beneficial to improve production efficiency and product quality.
Condenser is the critical component for compressing cooling cycle system, and function is the system of cooling, condensation and supercooling high temperature and pressure Cold working medium.The compound-refrigerating operating mode heat transfer temperature difference of transition season increases, unit area exchange capability of heat improves, although only with the One air-cooled heat exchanger fin 31 is used as condenser, total heat exchange area to reduce, but due to the effect of natural cooling, compressor module 1 it is total Discharge capacity also reduces, and does not influence the Proper Match for compressing refrigeration cycle parameter；Natural cooling operating mode is only in outdoor for compared with low temperature It just works in the environment of degree, realizes the application of natural cooling source, be the key that the present invention generates significantly energy-saving effect, increase nature Cooling heat exchanger area can promote energy-saving effect；In compound-refrigerating operating mode, the air cooling heat exchanger 32 for natural cooling is arranged In inlet side, the refrigeratory capacity of natural cooling is improved, the Air Temperature through the heating of inlet side heat exchanger, which rises, is less than 10 DEG C, is made to compression The Effec-tive Function and reliability of SAPMAC method have positive effect.First air-cooled heat exchanger fin 31, the second air-cooled heat exchanger fin 32 are designed Air-cooled heat exchange module 3 is constituted at heat exchanger assembly 33, and with wind turbine 34, is beneficial to standardization, large-scale production, improves production effect Rate and product quality, while its space structure is compact, system layout is beautiful, low cost.
As shown in Figure 1 and Figure 4, air treatment module 12 is by evaporator 121, evaporation fan 122 and stream in the present embodiment Control valve 123 is constituted, and the import of the evaporator 121 in each air treatment module 12 connects general piping for liquids 11, each air-treatment The outlet of the evaporator 121 of module 12 is connected to return header 13；The arrival end in evaporator 121 is arranged in flow control valve 123, The temperature-sensing element 125 of flow control valve 123 is mounted on the tube wall of the outlet end of evaporator 121；Flow control valve 123 is ratio The refrigerant temperature signal that evaporator 121 exports is converted to pressure signal using temperature-sensing element 125, and passes through capillary by regulating valve Pipe 124 transmits the aperture that pressure signal adjusts flow control valve 123, and to control the liquid supply rate of evaporator 121, refrigeration working medium is HFC, HCFC class or other environmentally friendly class refrigerants.
As shown in figure 5, the liquid storage device 9 in the present embodiment is multifunctional accumulator, first, liquid storage cold-storage；Second is that gas-liquid point From providing gas for compressor module 1；Third, opening oil-sucking hole in the elbow side of " u "-shaped pipe, oil return, lubricating oil deposition are assisted At bottom, compressor air suction, the speed of air-flow takes back the lubricating oil of bottom；One end connection pressure of " u "-shaped pipe 94 shown in fig. 5 The suction end of contracting machine module 1, the opening of the other end are located at the upper gas area in liquid storage device 9, and liquid storage device 9 is additionally provided with supply opening 91, the second import 92 and the first import 93；Gravity so that the working medium AUTOMATIC ZONING in liquid storage device 9, top are gas, lower part For liquid, a small amount of lubricating oil of bottom deposit.The open end of " u "-shaped pipe 94 in liquid storage device 9 is in gaseous working medium area, " U " The return bend of shape pipe 94 is close to the bottom of liquid storage device 9,1~2 suction of setting at the center side line of the return bend of " u "-shaped pipe 94 Oilhole 95, under the flow velocity and its differential pressure action that are formed in compressor air suction, sucking is deposited on the lubricating oil of 9 bottom of liquid storage device, Ensure that the lubricating oil not detached by oil eliminator 102 returns in compressor 101.The liquid of the liquid storage device 9 configured in the present embodiment Volume is equivalent to five minutes at full capacity liquid supply rates, and the design volume of wherein liquids and gases is respectively 60%, 40%, larger Then thermal inertia is big for liquid storage thermal capacity, and relative to the air-conditioning thermic load that frequent, wide cut changes, the thermal parameter stability of feed flow is good, Air-conditioner temperature precision is high.
In three kinds of different operating modes：
Compressing refrigeration work pattern is：The refrigerating capacity of air-conditioning system all carries out compression refrigeration by operation compressor module 1 It is provided, realizes that refrigerating capacity is adjusted by the load or off-load that execute compressor module 1.
The operating mode of natural cooling is：Compressor module 1 is out of service, and the refrigerating capacity of air-conditioning system is all by running certainly So cooling is provided, and realizes that refrigerating capacity is adjusted by the load or off-load that execute the rotating speed of cooling blower 34.
Compound-refrigerating operating mode is：It is preferentially run with the operating mode of natural cooling, insufficient cold is by compressor The compression refrigeration of module 1 is supplemented, and the adjusting of refrigerating capacity is realized by the load or off-load that execute compressor module 1；In sky When adjusting thermic load less than the cold that natural cooling is provided, compressor module 1 is out of service, and is switched to by executing cooling wind The load of the rotating speed of machine 34 or off-load realize that refrigerating capacity is adjusted.
Be arranged compression refrigeration work pattern circulation loop be：4th solenoid valve 14 and the first solenoid valve 2 are conducting, the Five solenoid valves 15, second solenoid valve 4 and third solenoid valve 6 are turned off, and the liquid working substance in liquid storage device 9 is provided dynamic by liquid pump 10 Power is exported from supply opening 91, enters air treatment module 12, the suction exported in air treatment module 12 by general piping for liquids 11 Hot working fluid returns to liquid storage device 9 through return header 13 and the 4th solenoid valve 14, and the top gaseous working medium of liquid storage device 9 passes through " u "-shaped pipe 94 enter compressor module 1, and the high pressure-temperature gaseous working medium being discharged in compressor module 1 is shunted by the first solenoid valve 2 first Exothermic condensation is high-pressure liquid working medium in air-cooled heat exchanger fin 31 and the second air-cooled heat exchanger fin 32, and high-pressure liquid working medium passes through the respectively One electric expansion valve 5 and 7 reducing pressure by regulating flow of the second electric expansion valve become low pressure, low temperature liquid, and return to liquid storage device by collector 8 9。
The circulation loop that natural cooling operating mode is arranged is：5th solenoid valve 15, the first solenoid valve 2, second solenoid valve 4 It is conducting with third solenoid valve 6, the 4th solenoid valve 14 is to close, and the liquid working substance in liquid storage device 9 provides power by liquid pump 10 It is exported from supply opening 91, air treatment module 12, the heat absorption exported in air treatment module 12 is entered by general piping for liquids 11 Working medium, through the 5th solenoid valve 15, is then shunted by the first solenoid valve 2 by return header 13, in the first air-cooled heat exchanger fin 31 and second Exothermic condensation is liquid refrigerant in air-cooled heat exchanger fin 32, and liquid refrigerant is entered by second solenoid valve 4 and third solenoid valve 6 respectively Collector 8 simultaneously returns to liquid storage device 9.
The circulation loop that compound-refrigerating operating mode is arranged is：5th solenoid valve 15 and third solenoid valve 6 are connected, the 4th electricity Magnet valve 14, the first solenoid valve 2 and second solenoid valve 4 are turned off, and the liquid working substance in liquid storage device 9 provides power from confession by liquid pump 10 Liquid mouth 91 exports, and enters air treatment module 12, the work of the heat absorption exported in air treatment module 12 by general piping for liquids 11 Matter enters the second air-cooled heat exchanger fin 32 through return header 13 and the 5th solenoid valve 15, in the second air-cooled heat exchanger fin 32 after heat release Working medium returns to liquid storage device 9 through third solenoid valve 6, and by collector 8；Meanwhile the gaseous working medium on 9 top of liquid storage device passes through " u "-shaped Pipe 94 enters compressor module 1, and the high pressure-temperature gaseous working medium being discharged in compressor module 1 enters the first air-cooled heat exchanger fin 31, And through 31 exothermic condensation of the first air-cooled heat exchanger fin be high-pressure liquid working medium, high-pressure liquid working medium by the first electric expansion valve 5 section Stream decompression becomes low pressure, low temperature liquid, and returns to liquid storage device 9 by collector 8.
Liquid pump is used to convey refrigeration working medium as indoor centralized cycle cooling in the present embodiment, power cycle reliability is high, It is not limited by installation site；Refrigeration working medium carries out phase-change heat-exchange in release end of heat and heat absorbing end, and heat transfer coefficient is big, heat exchange efficiency is high, Heat exchanger volume is small, compact-sized, while having the advantages that circular flow is small, conveying work(is small；Using liquid pump forced circulation, feed flow Amount is stablized, and flow-rate adjustment is convenient, accurate；Liquid pump pressure head can carry out best match, profit according to feed flow distance, drop and system resistance In the precision control of air-conditioner temperature.
Three kinds of different operating modes press following policy setting：
In TaUnder the operating mode of >=A2, compression refrigeration work pattern is operated to；
In A2 ＞ TaUnder the operating mode of ＞ A1, compound-refrigerating operating mode is operated to；
In TaUnder the operating mode of≤A1, natural cooling operating mode is operated to；
Wherein：TaFor outdoor environment temperature measured value, A1, A2 are set temperature, and A2 ＞ A1.
For refrigerating capacity Q in air-conditioning system0It is adjusted using fuzzy control rule, fuzzy control rule is with liquid storage device The temperature of refrigeration working medium is target component in 9, executes load or the off-load of compressor module 1, stops in whole refrigeration compressors 101 Load or the off-load that the rotating speed of cooling blower 34 is executed when machine, to adjust the refrigerating capacity Q of air-conditioning system0, accurately control liquid storage The temperature of refrigeration working medium in device 9；
It enables：TR is the set temperature of refrigeration working medium in liquid storage device 9；
T is the measuring temperature of refrigeration working medium in real-time detected liquid storage device 9；
Then have：Temperature deviation Δ T is：Δ T=(T-TR)；
Setting：Temperature deviation Δ T is five grades, is followed successively by from big to small by measuring temperature T：Honest, center, zero, it is negative In, it is negative big；
Setting：The change rate d Δs T/dt of measuring temperature T is followed successively by from big to small by temperature deviation Δ T：Honest, center, Zero, it in bearing, bears greatly；
The refrigerating capacity Q of air-conditioning system is realized by the load or off-load that control compressor module 1 or cooling blower 340Tune Section, regulated quantity U by being followed successively by from big to small for setting：Honest, center, zero, it is negative in, it is negative big；
Fuzzy rule is established, as shown in fig. 7, by measuring Δ T, calculating d Δ T/dt, blurring, blurring calculates, and handle Blurring result of calculation is converted into precise volume, controls compressor module 1 or wind turbine 34 executes load or off-load, accurately control liquid storage The temperature of refrigeration working medium in device 9.
Abscissa is outdoor environment temperature in Fig. 6, i.e., circumstance temperature, ordinate are energy, including：Air-conditioning rated heat input, rated heat load, pressure Contracting mechanism cold, air-cooled refrigerating capacity (being the refrigerating capacity of natural cooling) and air conditioning energy consumption.Wherein A2-A3 sections is compression refrigeration Area is freezed by compression and provides whole refrigerating capacitys, is carried by the plus-minus of compressor module 1 and is adjusted refrigerating capacity；A1-A2 sections are compound system Cold, natural cooling recycles oepration at full load, and refrigerating capacity that compression refrigeration supplement is insufficient carries the system of adjusting by the plus-minus of compressor module 1 Cold；A0-A1 sections, compression refrigeration is stopped, and controls the refrigerating capacity of the rotational speed regulation natural cooling of wind turbine 34；In each section, The variation of air-conditioning total energy consumption such as bottommost line segment is W1, W2, W3, W4, W5, W6 respectively from high temperature to low temperature.
As shown in fig. 6, air conditioner in machine room thermic load is constant in wide warm area；The output refrigerating capacity of compression refrigeration and natural cooling exists Traffic coverage increases with the decline of circumstance temperature, and progress energy adjustment is needed to be allowed to match with computer room thermic load.A3-A2 sections are Refrigeration mode workspace is compressed, the cold of compound air-conditioning system is all provided by operation compression refrigeration, compressed by controlling The energy of machine module 1, corresponding energy consumption variation is from W1 to W2；The A1-A2 sections of compound-refrigerating areas for transition season, air-cooled heat exchange mould 3 oepration at full load of block maximally utilizes natural cooling source, and the capacity of control compressor module 1 adjusts refrigerating capacity output, to should be able to Consumption variation is from W3 to W4, since natural cooling cycle operation effectively reduces the energy consumption of compressor module 1, W2>W3；A1-A0 Section is low temperature season, and computer room thermic load is less than the cold that natural cooling is provided, and compressor module 1 is stopped, compound sky Adjusting system operates in the most energy conservation state of full utilization natural cooling source, and the speed or operation number for controlling wind turbine 34 adjust wind The exchange capability of heat or refrigeratory capacity of cold heat exchange module 3, corresponding energy consumption variation is from W4 to W5；In wide warm area, compound air-conditioning system Total energy consumption be gradually reduced with the decline of circumstance temperature, the use of natural cooling source significantly reduces the total energy consumption of system, such as using single One compression refrigeration is then W1 to W6 in the variation of whole service warm area A3-A0 air conditioning energy consumptions, and not only energy consumption increases, while also increasing Pressurization compressing refrigeration system operates in the failure risk of low temperature environment.
Using the air-conditioning of the high-performance computer system of an actual motion as embodiment, the setting of enclosed server cabinet is sent Air temperature is 22 DEG C, return air temperature is 33 DEG C.
It can set：As 20 DEG C of outside air temperature ＞, air-conditioning system operates in compression refrigeration area；Outside air temperature At≤20 DEG C, air-conditioning system operates in compound-refrigerating workspace；Since the usual live load of computer system is in 40~60% models It encloses, the operation rule of compound-refrigerating workspace is：Oepration at full load is air-cooled to maximally utilize natural cooling source to realize, is changed when air-cooled When refrigerating capacity caused by thermal modules 3 is greater than or equal to thermic load, compressor module 1 is stopped, air-conditioning system full utilization Natural cooling source realizes air-conditioning system low energy consumption operation.
The air-conditionings objects such as the computer room that the present invention is 27 DEG C or 24 DEG C for indoor set temperature, the interior refrigeration of liquid storage device 22 The set temperature of working medium can be adjusted suitably, under conditions of meeting air-conditioning temperature and refrigerating capacity requires, run natural cooling, The low-carbon operation for realizing air-conditioning system and the high-quality for ensuring room air.

Claims (6)

1. a kind of compound air-conditioning system with natural cooling function, it is characterized in that：
The composition of the air-conditioning system includes：Compressor module (1) is made of heat exchanger assembly (33) and cooling blower (34) Air-cooled heat exchange module (3), liquid storage device (9), liquid pump (10), air treatment module (12) and each control valve, pass through operation and control The flow path that valve changes refrigeration working medium realizes following three kinds of different operating modes：Compress refrigeration work pattern, compression refrigeration With the compound-refrigerating operating mode and natural cooling operating mode of natural cooling synthetic operation；The compressor module (1) It exports and is divided into two-way, the arrival end for the first air-cooled heat exchanger fin (31) that wherein first via is directly connected in heat exchanger assembly (33), Second tunnel is connect with the arrival end of the second air-cooled heat exchanger fin (32) in heat exchanger assembly (33) by the first solenoid valve (2)； The outlet end of the first air-cooled heat exchanger fin (31) is connected to collector (8) by the first electric expansion valve (5), in first electronics The both ends of expansion valve (5) are connected in parallel second solenoid valve (4)；The outlet end of the second air-cooled heat exchanger fin (32) passes through the second electricity Sub- expansion valve (7) connection collector (8), third solenoid valve (6) is connected in parallel at the both ends of second electric expansion valve (7)；Institute State the first import (93) that collector (8) is connected to liquid storage device (9), the external-connected port connection of the " u "-shaped pipe (94) in liquid storage device (9) To the suction end of compressor module (1), the supply opening (91) of liquid storage device (9) is connected to air-treatment mould by general piping for liquids (11) The arrival end of block (12), the liquid pump (10) are arranged in the general piping for liquids (11)；Connection is in air treatment module (12) Second import (92) of the return header (13) of outlet end all the way through the 4th solenoid valve (14) connection liquid storage device (9), another way warp 5th solenoid valve (15) is connected to the arrival end of the second air-cooled heat exchanger fin (32)；
The compression refrigeration work pattern is：The refrigerating capacity of air-conditioning system all carries out compression system by operation compressor module (1) It is cold to be provided, realize that refrigerating capacity is adjusted by the load or off-load that execute compressor module (1)；
The operating mode of the natural cooling is：Compressor module (1) is out of service, and the refrigerating capacity of air-conditioning system is all by running Natural cooling is provided, and realizes that refrigerating capacity is adjusted by the load or off-load that execute the rotating speed of cooling blower (34)；
The compound-refrigerating operating mode is：It is preferentially run with the operating mode of natural cooling, insufficient cold is by compressor The compression refrigeration of module (1) is supplemented, and the adjusting of refrigerating capacity is realized by the load or off-load that execute compressor module (1)； When air-conditioning thermic load is less than the cold that natural cooling is provided, compressor module (1) is out of service, and is switched to and passes through execution The load of the rotating speed of cooling blower (34) or off-load realize that refrigerating capacity is adjusted.
2. the compound air-conditioning system according to claim 1 with natural cooling function, it is characterized in that for air-conditioning system Refrigerating capacity Q in system0It is adjusted using fuzzy control rule, the fuzzy control rule is with liquid storage device (9) interior refrigeration working medium Temperature be target component, execute compressor module (1) load or off-load, held when whole refrigeration compressors (101) are shut down The load of the rotating speed of row cooling blower (34) or off-load, to adjust the refrigerating capacity Q of air-conditioning system0, accurately control liquid storage device (9) temperature of interior refrigeration working medium；
It enables：TR is the set temperature of liquid storage device (9) interior refrigeration working medium；
T is the measuring temperature of the interior refrigeration working medium of real-time detected liquid storage device (9)；
Then have：Temperature deviation Δ T is：Δ T=(T-TR)；
Setting：Temperature deviation Δ T is five grades, is followed successively by from big to small by measuring temperature T：Honest, center, zero, it is negative in, it is negative Greatly；
Setting：The change rate d Δs T/dt of the measuring temperature T is followed successively by from big to small by temperature deviation Δ T：Honest, center, Zero, it in bearing, bears greatly；
The refrigerating capacity Q of air-conditioning system is realized by the load or off-load that control compressor module (1) or cooling blower (34)0Tune Section, regulated quantity U by being followed successively by from big to small for setting：Honest, center, zero, it is negative in, it is negative big；
Fuzzy rule is established, by measuring Δ T, calculating d Δ T/dt, is calculated through blurring, and blurring result of calculation is converted For precise volume, control compressor module (1) or cooling blower (34) execute load or off-load, accurately control system in liquid storage device (9) The temperature of cold working medium.
3. the compound air-conditioning system according to claim 1 with natural cooling function, it is characterized in that：Described three kinds are not Same operating mode presses following policy setting：
In TaUnder the operating mode of >=A2, compression refrigeration work pattern is operated to；
In A2 ＞ TaUnder the operating mode of ＞ A1, compound-refrigerating operating mode is operated to；
In TaUnder the operating mode of≤A1, natural cooling operating mode is operated to；
Wherein：TaFor outdoor environment temperature measured value, A1, A2 are set temperature, and A2 ＞ A1.
4. the compound air-conditioning system according to claim 1 with natural cooling function, it is characterized in that：The pressure is set The circulation loop of the cold operating mode of contraction is：4th solenoid valve (14) and the first solenoid valve (2) are conducting, the 5th solenoid valve (15), second solenoid valve (4) and third solenoid valve (6) are turned off, and the liquid working substance in liquid storage device (9) is provided by liquid pump (10) Power is exported from supply opening (91), enters air treatment module (12) by general piping for liquids (11), in air treatment module (12) The heat absorption working medium of middle output returns to liquid storage device (9), the top gas of liquid storage device (9) through return header (13) and the 4th solenoid valve (14) State working medium enters compressor module (1), the high pressure-temperature gaseous working medium being discharged in compressor module (1) by " u "-shaped pipe (94) By the first solenoid valve (2) shunting, exothermic condensation is high pressure liquid in the first air-cooled heat exchanger fin (31) and the second air-cooled heat exchanger fin (32) State working medium, the high-pressure liquid working medium pass through respectively the first electric expansion valve (5) and the second electric expansion valve (7) reducing pressure by regulating flow at For low pressure, low temperature liquid, and passes through collector (8) and return to liquid storage device (9)；
The circulation loop that the natural cooling operating mode is arranged is：5th solenoid valve (15), the first solenoid valve (2), the second electricity Magnet valve (4) and third solenoid valve (6) are conducting, and the 4th solenoid valve (14) is to close, and the liquid working substance in liquid storage device (9) is by liquid It pumps (10) and provides power from supply opening (91) output, air treatment module (12) is entered by general piping for liquids (11), at air The heat absorption working medium exported in module (12) is managed by return header (13) through the 5th solenoid valve (15), then by the first solenoid valve (2) Shunting, exothermic condensation is liquid refrigerant, the liquid work in the first air-cooled heat exchanger fin (31) and the second air-cooled heat exchanger fin (32) Matter enters collector (8) by second solenoid valve (4) and third solenoid valve (6) respectively and returns to liquid storage device (9)；
The circulation loop that the compound-refrigerating operating mode is arranged is：5th solenoid valve (15) and third solenoid valve (6) conducting, the Four solenoid valves (14), the first solenoid valve (2) and second solenoid valve (4) are turned off, and the liquid working substance in liquid storage device (9) is by liquid pump (10) it provides power to export from supply opening (91), air treatment module (12) is entered by general piping for liquids (11), in air-treatment The working medium of the heat absorption exported in module (12) enters the second air-cooled heat exchanger fin through return header (13) and the 5th solenoid valve (15) (32), the working medium in the described second air-cooled heat exchanger fin (32) after heat release is returned through third solenoid valve (6), and by collector (8) Liquid storage device (9)；Meanwhile the gaseous working medium on liquid storage device (9) top enters compressor module (1), compressor by " u "-shaped pipe (94) The high pressure-temperature gaseous working medium being discharged in module (1) enters the first air-cooled heat exchanger fin (31), and through the first air-cooled heat exchanger fin (31) Exothermic condensation is high-pressure liquid working medium, and the high-pressure liquid working medium becomes low pressure by the first electric expansion valve (5) reducing pressure by regulating flow Cryogenic liquid, and liquid storage device (9) is returned to by collector (8).
5. the compound air-conditioning system according to claim 1 with natural cooling function, it is characterized in that：First wind Cold heat exchanger fin (31) and the heat exchanger that the second air-cooled heat exchanger fin (32) is same type, including pipe type or parallel flow heat exchanger； In face of wind direction arrange heat exchanger assembly (33) be it is parallel with second air-cooled heat exchanger fin (32) by the first air-cooled heat exchanger fin (31) and It constitutes side by side, wherein the first air-cooled heat exchanger fin (31) is located at air side, and the second air-cooled heat exchanger fin (32) is located at inlet side；Institute State in air-cooled heat exchange module (3), the heat exchanger assemblies (33) of two groups of symmetrical arrangements air side arrange one it is shared Cooling blower (34), the cooling blower (34) be DC frequency-changing wind turbine, or for top gear, mid ranger, low or first gear and The step speed regulation wind turbine of lock catch.
6. the compound air-conditioning system according to claim 1 with natural cooling function, it is characterized in that：At the air Managing module (12) is made of evaporator (121), evaporation fan (122) and flow control valve (123), each air treatment module (12) the import connection general piping for liquids (11) of the evaporator (121) in, evaporator (121) of each air treatment module (12) go out Mouth is connected to return header (13)；Flow control valve (123) setting is in the arrival end of the evaporator (121), the stream The temperature-sensing element (125) of control valve (123) is mounted on the tube wall of the outlet end of the evaporator (121)；The flow control Valve (123) processed is ratio adjusting valve, is converted to the refrigerant temperature signal that evaporator (121) exports using temperature-sensing element (125) Pressure signal, and the aperture that pressure signal adjusts flow control valve (123) is transmitted by capillary (124), to control evaporation The liquid supply rate of device (121).
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