CN106352575B - A kind of multi-joint rack energy-saving air conditioning system and its control method - Google Patents
A kind of multi-joint rack energy-saving air conditioning system and its control method Download PDFInfo
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- CN106352575B CN106352575B CN201610900730.6A CN201610900730A CN106352575B CN 106352575 B CN106352575 B CN 106352575B CN 201610900730 A CN201610900730 A CN 201610900730A CN 106352575 B CN106352575 B CN 106352575B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000005057 refrigeration Methods 0.000 claims description 102
- 239000007788 liquid Substances 0.000 claims description 27
- 238000001514 detection method Methods 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 18
- 230000003111 delayed effect Effects 0.000 claims description 14
- 238000007791 dehumidification Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 description 13
- 230000005494 condensation Effects 0.000 description 12
- 239000003921 oil Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
- F24F11/70—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
-
- 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
-
- 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
- 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
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—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
- F24F11/85—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 variable-flow pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of multi-joint rack energy-saving air conditioning system and its control methods, and wherein natural cooling condenser passes through second solenoid valve, the 4th solenoid valve and the 6th solenoid valve respectively and connect respectively with the first evaporator, the second evaporator and the third evaporator for being set to outdoor；Refrigerated medium pump passes through the first solenoid valve, third solenoid valve and the 5th solenoid valve respectively and connect with outdoor the first condenser, the second condenser and third condenser is arranged in；First evaporator is connect with the first condenser, and the second evaporator is connect with the second condenser, and third evaporator is connect with third condenser.The present invention can support Single Cabinet application, can also support multi-joint cabinet and cabinet application, and can be used as the alternative solution of modularization computer room application, and cost of investment is low, and installation is fast, and operational efficiency is high.
Description
Technical field
The present invention relates to technical field of air conditioner refrigeration more particularly to a kind of multi-joint rack energy-saving air conditioning system and its
Control method.
Background technique
In data center's industry, continuous growth with all trades and professions to processing data information and application product, in data
The heat density of central server also require it is higher and higher, thus before tens watts of unit calorific value several hectowatts till now or even several
Kilowatt, also mean that the requirement in terms of server radiating is also higher and higher, refrigeration radiating application mode also emerges one after another, simultaneously
The utilization and consumption of the influence energy of bring another aspect also will be more and more, how to do equipment cooling greener
Color is more energy saving, is a major challenge that current data center's air conditioner industry is faced.
In traditional data center machine room, many applications are directly to blow out cold wind to server radiating, and this mode is made
It is many at refrigerating capacity waste, and then the diversified application mode such as floor blowing and cold and hot channel separation is caused to occur, also for
The practical application of all kinds of industries provides diversified selection.
In current data center's industry, the more of application is that server is carried out to cold and hot channel separation, increases sealing
Blind plate prevents hot and cold air short-circuit, and what is derived is that cold passage is closed, the passage of heat is closed, cold and hot channel enclosed application mode, into
And there has also been the appearance of modular data center product.In above data center products, for middle-size and small-size data center
Energy-saving type air conditioner products application scheme is less, in large-scale data center, integrates fluorine pumping system using compressor assembly and integrates new
Rheumatism film is the more refrigerated energy-saving mode of application.But above traditional and emerging air conditioner refrigerating side, data center
Method has some disadvantages；
Compressor assembly integrates wet film fresh air system: wet film fresh air mode is used, by outdoor low temperature and low humidity air-flow through overly moist
Film humidification filtering, into computer room, there are computer room humidity is uncontrollable, and to the seal request of computer room height；In the outdoor environment of high humidity
Under, the application for cold and hot closed channel is limited very big.
High cooling power compressor assembly integrates fluorine pumping system: it is indoor built in compressor, it cannot achieve a condenser for more
The operating mode of evaporator, and currently on the market without the energy-saving type air conditioner product of small cooling capacity section (1 to 20kW), the big portion of air-conditioning system
Dividing all has refrigerating capacity excessive (common refrigerating capacity reaches 60kW), cannot be considered in terms of rack data center products
Market application demand, the energy-saving type air conditioner application for Single Cabinet grade or multi-joint cabinet, it is difficult to realize.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of multi-joint rack energy-saving air conditioning systems
And its control method, it can support Single Cabinet application, can also support multi-joint cabinet and cabinet application, and can be used as modularization computer room
The alternative solution of application, cost of investment is low, and installation is fast, and operational efficiency is high.
Technical scheme is as follows:
A kind of multi-joint rack energy-saving air conditioning system is condensed including fluid reservoir and the natural cooling being separately connected with fluid reservoir
Device and refrigerated medium pump, including sharing the first evaporator, the compressor assembly of the second evaporator and third evaporator and naturally cold system
System；
The refrigerated medium pump pass through respectively second solenoid valve, the 4th solenoid valve and the 6th solenoid valve respectively be set to interior
The first evaporator, the second evaporator connects with third evaporator；
The natural cooling condenser passes through the first solenoid valve, third solenoid valve and the 5th solenoid valve respectively and is arranged in room
Outer the first condenser, the second condenser are connected with third condenser；
First evaporator is connect with the first condenser, and second evaporator is connect with second condenser, institute
Third evaporator is stated to connect with third condenser.
Further include and sequentially connected first oil eliminator of the first condenser, the first compressor and the first gas-liquid separator；
With sequentially connected second oil eliminator of the second condenser, the second compressor and the second gas-liquid separator；
With the sequentially connected third oil eliminator of third condenser, third compressor and third gas-liquid separator.
The multi-joint rack energy-saving air conditioning system includes: when having refrigeration demand in cabinet and cabinet return air temperature is less than
At 10 DEG C of outdoor environment return air temperature or more, the operation of the first compressor of control is simultaneously run in the frequency of the first compressor to restriction frequency
The operation of the second compressor is controlled when section, is delayed after the second compressor is run to restriction frequency range and detects cabinet refrigeration demand, root
Judge whether to run third compressor according to refrigeration demand, simultaneously closes off the first to the 6th solenoid valve, closes refrigerated medium pump and nature
Cooling fan opens first to third condenser.
Further include:
When having refrigeration demand in cabinet and outdoor temperature is lower than 10 DEG C of cabinet air conditioner return air temperature or more, start refrigerant
Pump, the first solenoid valve, second solenoid valve, the first evaporator control the first expansion valve standard-sized sheet；Delay detection cabinet refrigeration demand,
Third solenoid valve, the 4th solenoid valve, the second evaporator are opened when having refrigeration demand, controls the second expansion valve；Delay detection again
Cabinet refrigeration demand opens the 5th solenoid valve and the 6th solenoid valve when having refrigeration demand.
Further include:
Refrigerated medium pump running frequency is adjusted according to cabinet refrigeration demand, and cabinet load is adapted to by variable-flow application in real time；
When there is dehumidification in cabinet, one or more control valve openings of the control first into third expansion valve are big
It is small, judged according to effect on moisture extraction and controls whether first enter to third expansion valve or exit dehumidifying shaping modes.
A kind of multi-joint rack energy-saving air conditioning system is condensed including fluid reservoir and the natural cooling being separately connected with fluid reservoir
Device and refrigerated medium pump, including compressor assembly, natural cooling system and hybrid system, the naturally cold evaporator and the compressor
Evaporator is mounted side by side, and shares indoor fan；
The natural cooling condenser pass through respectively the first solenoid valve, second solenoid valve and third solenoid valve respectively with setting
The naturally cold evaporator of first indoors, the cold evaporator of the second nature are connected with the cold evaporator of Third Nature；
The refrigerated medium pump passes through the first naturally cold expansion valve, the cold expansion valve of the second nature and the cold expansion of Third Nature respectively
Valve is connect with setting the first naturally cold evaporator, the cold evaporator of the second nature and the cold evaporator of Third Nature indoors respectively；
It further include sequentially connected first evaporator, the first compressor, the first condenser, the first expansion valve；It is sequentially connected
The second evaporator, the second compressor, the second condenser, the second expansion valve；Third evaporator, third compressor, third condensation
Device, third expansion valve；
It is described nature cooling system include the refrigerated medium pump being sequentially connected end to end, the first solenoid valve, the first naturally cold expansion valve,
First naturally cold evaporator, natural cool condenser and fluid reservoir.
Multi-joint rack energy-saving air conditioning system includes: when having refrigeration demand and cabinet return air temperature to be less than outdoor ring in cabinet
At 7 DEG C of border return air temperature or more, the operation of the first compressor of control is simultaneously run in the frequency of the first compressor to restriction frequency range time control
The operation of the second compressor is made, be delayed after the second compressor is run to restriction frequency range and detects cabinet refrigeration demand, according to refrigeration
Demand runs third compressor, simultaneously closes off first to third solenoid valve, closes refrigerated medium pump and natural cooling fan, opens the
One to third condenser.
Further include:
When having refrigeration demand and outdoor temperature lower than 7 DEG C of cabinet air conditioner return air temperature or more in cabinet, open first to
The cold expansion valve of Third Nature, control refrigerated medium pump are limiting frequency range operation, the cold condenser fan operation of control nature；It is delayed and detects
Cabinet refrigeration demand opens the with compressor when having a refrigeration demand；First compressor is run to the inspection that is delayed again when limiting frequency range
Cabinet refrigeration demand is surveyed, the second compressor and third compressor are run according to refrigeration demand.
Further include:
When having refrigeration demand in cabinet and outdoor temperature is greater than 7 DEG C lower than the cabinet air conditioner return air temperature temperature difference, system is opened
Cryogenic fluid pump, the first solenoid valve, the first naturally cold evaporator, delay detection cabinet refrigeration demand, open second when having refrigeration demand
The cold evaporator of solenoid valve, the second nature, the cold expansion valve of the second nature；Delay detection cabinet refrigeration demand again, there is refrigeration demand
Shi Kaiqi third solenoid valve.
Further include:
Refrigerated medium pump running frequency is adjusted according to cabinet refrigeration demand, and cabinet load is adapted to by variable-flow application in due course；
When there is dehumidification in cabinet, one or more regulating valves of the control first into the cold expansion valve of Third Nature are opened
Size is spent, judged according to effect on moisture extraction and controls whether first enter to the cold expansion valve of Third Nature or exit dehumidifying adjusting mould
Formula.
Multi-joint rack energy-saving air conditioning system provided by the present invention and its control method, can support Single Cabinet application,
It can also support multi-joint cabinet and cabinet application, and can be used as the alternative solution of modularization computer room application, cost of investment is low, and installation is applied
Work is fast, and operational efficiency is high；The energy-saving type air conditioner integral compressor system and natural cooling system, are judged by the refrigeration demand of controller
With analysis intelligent selection compressor mode, mixed mode, naturally cold three kinds of application modes of mode, mixing and natural cold operation mould
Cooling capacity output control can be accurately carried out under formula, in conjunction with compressor variable frequency control system, meet 1 to 20kW rack data center
Data center's PUE value is effectively reduced in the energy-saving run of annual different load, guarantees the operation of data center products normal table.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multi-joint rack energy-saving air conditioning system first embodiment in the present invention.
Fig. 2 is the structural schematic diagram of multi-joint rack energy-saving air conditioning system second embodiment in the present invention.
Specific embodiment
The present invention provides a kind of multi-joint rack energy-saving air conditioning system and its control method, to make the purpose of the present invention, skill
Art scheme and effect are clearer, clear, referring to the drawings and give an actual example that the present invention is described in more detail.It should manage
Solution, described herein specific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment one
Referring to Fig. 1, multi-joint rack energy-saving air conditioning system provided by the invention, by pump circulation module 1,2 and of indoor
Outside 3 forms comprising controller, liquid storage pipe and the natural cooling condenser and refrigerated medium pump being separately connected with fluid reservoir 11
14, differential-pressure bypass valve 13 is parallel on refrigerated medium pump 14.Including sharing the first evaporator, the second evaporator and third evaporator
Compressor assembly and natural cooling system.
The refrigerated medium pump 14 passes through second solenoid valve 212, the 4th solenoid valve 214 and the 6th solenoid valve 216 difference respectively
It is connect with the first evaporator 221, the second evaporator 222 and the third evaporator 223 for being set to outdoor.
The nature cool condenser 12 passes through the first solenoid valve 211, third solenoid valve 213 and the 5th solenoid valve 215 respectively
It is connect with the first condenser 311, the second condenser 312 and the third condenser 313 for being arranged in outdoor.
First evaporator 221 is connect with the first condenser 311, second evaporator 222 and second condensation
Device 312 connects, and the third evaporator 223 is connect with third condenser 313.
Further, the multi-joint rack energy-saving air conditioning system further includes and the first condenser 311 sequentially connected
One oil eliminator 341, the first compressor 321 and the first gas-liquid separator 331.
With sequentially connected second oil eliminator 342 of the second condenser 312, the second compressor 322 and the second gas-liquid separation
Device 332.
With the sequentially connected third oil eliminator 343 of third condenser 313, third compressor 323 and third gas-liquid separation
Device 333.
Naturally the operational process of cold mode are as follows:
Refrigerated medium pump-second solenoid valve-evaporator-first of the first expansion valve-first solenoid valve-condensation naturally
Device-fluid reservoir-refrigerated medium pump；
Compressor mode operational process:
The evaporator of expansion valve-first of condenser-first of first compressor-oil eliminator-first -- gas-liquid separation
The first compressor of device-.
As seen from the figure, fluid reservoir 11, natural cooling condenser and refrigerated medium pump 14 constitute pump circulation module, expansion valve and steaming
Hair device composition is inside module, and condenser, oil eliminator, compressor and gas-liquid separator composition are outside modules.Wherein first
Gas-liquid separator 331 is connect with the first condenser 311 again, the first gas-liquid separator 331, first condenser the 311, first oil separation
Device 341, the first compressor 321 and the first connection of the first gas-liquid separator 331；Second gas-liquid separator 332 is condensed with second again
Device 312 connects, the second gas-liquid separator 332, the second condenser 312, the second oil eliminator 342, the second compressor 322 and second
The first connection of gas-liquid separator 332；Third gas-liquid separator 333 is connect with third condenser 313 again, third gas-liquid separator
333, third condenser 313, third oil eliminator 343, third compressor 323 and the first connection of third gas-liquid separator 333.
The present invention is divided into compressor assembly and natural cooling system, compressor mode operation logic are as follows: compressor is to first cold
311 to the first expansion valve of condenser, 231 to the first evaporator 221.Natural cooling system shares indoor evaporator, indoor fan and interior
Outer machine gas side and liquid side connecting tube；When opening nature cooling system, by opening the bypass solenoid valve of gas-liquid connecting tube, carry out
Freecooling mode operation, a natural cooling system can support one or more indoor energy-saving air-conditioning to work at the same time, core mould
Block is refrigerated medium pump 14, intelligent controller etc.；More indoor units share a freecooling condenser 12, reduce condensation
The installation space of device quantity and live condenser.
Multi-joint rack energy-saving air conditioning system of the invention is done below with reference to control method of the invention and is further said
It is bright；The control method of the multi-joint rack energy-saving air conditioning system, including compressor assembly mode:
When having refrigeration demand in cabinet and cabinet return air temperature is less than 10 DEG C of outdoor environment return air temperature or more, that is, work as machine
There is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and when the temperature gap of the two is less than 10 DEG C,
Control the first compressor 321 operation and the frequency of the first compressor 321 run to limit frequency range when control the second compressor 322
Operation is delayed to after limiting frequency range after the operation of the second compressor 322 and detects cabinet refrigeration demand, according to refrigeration demand operation the
Three compressors 323 simultaneously close off the first to the 6th solenoid valve 216, close refrigerated medium pump 14 and condenser, open first to third
Condenser 313.
For easier description the present embodiment, first, second, third, etc. label description is replaced with first below, the
Two, the labels such as third replace, similarly hereinafter.Such as: when thering is refrigeration demand and cabinet return air temperature to be less than outdoor environment return air in cabinet
At 10 DEG C of temperature or more, i.e., when there is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature, and the two at this time
Temperature gap less than 10 DEG C when, controller intelligent decision compressor assembly open, the first compressor 321 operation, machine to be compressed
After frequency rises to most high frequency, the operation of the second compressor 322, when rising to most high frequency, after delay 3 minutes, detection cabinet refrigeration is needed
It asks, if still there is refrigeration demand, third compressor 323 also opens operation.The first to the 6th solenoid valve 216 remains turned-off shape at this time
State, refrigerated medium pump 14 are closed, freecooling condenser 12(natural cooling condenser) condensation fan close, first to the
Three condensation fans are opened.
The control method of the multi-joint rack energy-saving air conditioning system, further includes nature cooling system mode:
When having refrigeration demand in cabinet and outdoor temperature is greater than 10 DEG C or more lower than the cabinet air conditioner return air temperature temperature difference, i.e.,
When there is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is greater than etc.
When 10 DEG C, starting refrigerated medium pump 14, the first solenoid valve 211, second solenoid valve 212, the first evaporator 221 and the first solenoid valve
211；Delay detection cabinet refrigeration demand opens third solenoid valve 213, the evaporation of the 4th solenoid valve 214, second when having refrigeration demand
Device 222 and the second expansion valve 232；Delay detection cabinet refrigeration demand again opens 215 He of the 5th solenoid valve when having refrigeration demand
6th solenoid valve 216.
Such as: when there is refrigeration demand in cabinet, and outdoor temperature lower than the cabinet air conditioner return air temperature temperature difference reach 10 DEG C with
On, i.e., when there is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is big
When being equal to 10 DEG C, controller intelligent decision nature cooling system is opened, and refrigerated medium pump 14 is opened at this time, and first to second solenoid valve
212 open, the operation of the first evaporator 221, the first expansion valve standard-sized sheet；Delay 3 minutes, detection cabinet have refrigeration demand, and third is extremely
4th solenoid valve 214 is opened, the operation of the second evaporator 222, the second expansion valve standard-sized sheet；3min is delayed again, judges refrigeration demand,
5th to the 6th solenoid valve 216 is opened.
Further, 14 running frequency of refrigerated medium pump is adjusted according to cabinet refrigeration demand to adapt in real time by variable-flow application
Cabinet load；When there is dehumidification in cabinet, one or more control valve openings of the control first into third expansion valve 233
Size judges according to effect on moisture extraction and controls whether first enter to third expansion valve 233 or exit dehumidifying shaping modes.
I.e. according to cabinet refrigeration demand, refrigerated medium pump 14 carries out frequency adjusting and adapts to cabinet in real time by variable-flow application
Heat load, stable operation.The condensation fan of Freecooling condenser 12 carries out air quantity tune according to the number for opening evaporator
Section reduces condensation fan revolving speed or reduces the runing time of condensation fan, energy conservation.When interior of equipment cabinet has dehumidification, control
Device carries out expansion valve regulation, turns down valve opening, and indoor fan intelligently drops air quantity, dehumidifies；Simultaneously according to effect on moisture extraction, judgement
Whether first enter to third expansion valve or exit dehumidification mode.
Embodiment two
Referring to Fig. 2, as another embodiment of the invention, the multi-joint rack energy-saving air conditioning system is followed by pump
Ring moulds block 4, indoor 6 and outside 5 form；It includes controller, liquid storage pipe and is separately connected with fluid reservoir 41
Freecooling condenser 42 (natural cooling condenser) and refrigerated medium pump 44 are parallel with differential-pressure bypass valve on refrigerated medium pump 44
43.Including compressor assembly, natural cooling system and hybrid system, the compressor assembly and the natural cooling system use respectively
Independent first evaporator, the second evaporator and third evaporator.Naturally the cold evaporator and the compressor evaporator are simultaneously
Row's installation, shares drip tray and indoor fan.
The natural cooling condenser passes through the first solenoid valve 651, second solenoid valve 652 and third solenoid valve 653 respectively
The first naturally cold evaporator 631, the cold evaporator 632 of the second nature and the cold evaporator of Third Nature with setting indoors respectively
633 connections.
The refrigerated medium pump passes through the first naturally cold expansion valve 641, the cold expansion valve 642 of the second nature and Third Nature respectively
Cold expansion valve 643 respectively with setting the first naturally cold evaporator 631, the cold evaporator 632 of the second nature and third indoors oneself
So cold evaporator 633 connects.
It further include sequentially connected first evaporator 621, the first compressor 521, the first condenser 511, the first expansion valve
611；Sequentially connected second evaporator 622, the second compressor 522, the second condenser 512, the second expansion valve 612；Third is steamed
Send out device 623, third compressor 523, third condenser 513, third expansion valve 613.
Natural cooling system of the invention independently uses indoor evaporator and indoor and outdoor machine connecting tube, naturally cold evaporator and pressure
Contracting machine evaporator is mounted side by side, and shares drip tray, shares indoor fan.There are three types of operating mode, compressor moulds for the embodiment two
Formula, naturally cold mode and mixed mode work, natural cooling system are independent loops system, can enable mixed-mode operations.
Multi-joint rack energy-saving air conditioning system of the invention is done below with reference to control method of the invention and is further said
It is bright；The control method of the multi-joint rack energy-saving air conditioning system, including compressor assembly mode:
When having refrigeration demand in cabinet and cabinet return air temperature is less than 7 DEG C of outdoor environment return air temperature or more, that is, work as machine
There is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and when the temperature gap of the two is less than 7 DEG C,
Control the first compressor 521 operation and the frequency of the first compressor 521 run to limit frequency range when control the second compressor 522
Operation is delayed to after limiting frequency range after the operation of the second compressor 522 and detects cabinet refrigeration demand, according to refrigeration demand operation the
Three compressors 523 simultaneously close off first to third solenoid valve 653, closing refrigerated medium pump and condenser, it is cold to third to open first
Condenser 513.
Such as: when thering is refrigeration demand and cabinet return air temperature to be less than 7 DEG C of outdoor environment return air temperature or more in cabinet, that is, work as
There is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is less than 7 DEG C
When, controller intelligent decision compressor assembly is opened, the operation of the first compressor 521, after unit frequency to be compressed rises to most high frequency, the
The operation of two compressors 522 after delay 3 minutes, detects cabinet refrigeration demand when rising to most high frequency, if still there is refrigeration demand,
Third compressor 523 also opens operation.It first being remained off at this time to third solenoid valve 653, refrigerated medium pump is closed,
Freecooling condensation fan is closed, and first to third condensation fan opens.
The control method of the multi-joint rack energy-saving air conditioning system, further includes mixed mode:
When having refrigeration demand in cabinet and outdoor temperature is lower than 7 DEG C of cabinet air conditioner return air temperature or more, i.e., when in cabinet
Have refrigeration demand, if at this time cabinet return air temperature be higher than outdoor environment temperature, and the temperature gap of the two be more than or equal to 7 DEG C when,
First is opened to the cold expansion valve of Third Nature, refrigerated medium pump is controlled and is limiting frequency range operation, control nature cool condenser operation；Prolong
When and detect cabinet refrigeration demand, the first compressor is opened when having refrigeration demand；The operation of first compressor 521 is to when limiting frequency range
Delay detection cabinet refrigeration demand again runs the second compressor 522 and third compressor 523 according to refrigeration demand.
Such as: when there is refrigeration demand in cabinet, and outdoor temperature reaches 7 DEG C or more lower than cabinet air conditioner return air temperature, i.e.,
When there is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is greater than etc.
When 7 DEG C, controller intelligent decision nature cooling system is preferentially opened, and at this time first to cold 643 standard-sized sheet of expansion valve of Third Nature, system
The operation of cryogenic fluid pump highest frequency, freecooling condensation fan full speed running, compressor assembly is not turned at this time；It is delayed within 3 minutes
Afterwards, controller detection cabinet still has refrigeration demand, then opens the first compressor 521, compressor is run from low frequency to high-frequency
Afterwards, detection delay 3 minutes judge whether to need to start second to third compressor 523 according to real-time refrigeration demand.
The control method of the multi-joint rack energy-saving air conditioning system further includes nature cooling system mode, the nature
Cooling system includes that the refrigerated medium pump being sequentially connected end to end, the naturally cold expansion valve 641, first of the first solenoid valve 651, first are naturally cold
Evaporator 631, natural cool condenser and fluid reservoir 41.Natural cooling mode operation logic are as follows: refrigerated medium pump to the first solenoid valve
651 to the first naturally cold naturally cold evaporators 631 of expansion valve 641 to the first are to natural cool condenser to fluid reservoir 41 to refrigerant
Pump.
When having refrigeration demand in cabinet and outdoor temperature is greater than 7 DEG C lower than the cabinet air conditioner return air temperature temperature difference, that is, work as machine
There is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is more than or equal to 7 DEG C
When, refrigerated medium pump, the naturally cold evaporator 631 of the first solenoid valve 651, first are opened, delay detection cabinet refrigeration demand has refrigeration
Second solenoid valve 652, the cold evaporator 632 of the second nature, the second nature cold expansion valve 642 are opened when demand；Delay detection again
Cabinet refrigeration demand opens third solenoid valve 653 when having refrigeration demand.
Such as: when there is refrigeration demand in cabinet, and outdoor temperature lower than the cabinet air conditioner return air temperature temperature difference reach 7 DEG C with
On, i.e., when there is refrigeration demand in cabinet, if cabinet return air temperature is higher than outdoor environment temperature at this time, and the temperature gap of the two is big
When being equal to 7 DEG C, controller intelligent decision nature cooling system is opened, and refrigerated medium pump is opened at this time, and the first solenoid valve 651 is opened,
First naturally cold evaporator 631 works, and the first naturally cold 641 standard-sized sheet of expansion valve, compressor assembly is closed；It is delayed within 3 minutes, detection
Cabinet still has refrigeration demand, and second solenoid valve 652 is opened, and the cold evaporator 632 of the second nature works, the cold expansion valve of the second nature
642 standard-sized sheets；It is delayed within 3 minutes again, judges refrigeration demand, third solenoid valve 653 is opened.
Further, the control method of the multi-joint rack energy-saving air conditioning system, natural cooling system mode is also
Include:
Refrigerated medium pump running frequency is adjusted according to cabinet refrigeration demand, and cabinet load is adapted to by variable-flow application in real time；When
When having dehumidification in cabinet, one or more control valve opening sizes of the control first into the cold expansion valve 643 of Third Nature,
Judge and control first whether enter or exit dehumidifying shaping modes to the cold expansion valve 643 of Third Nature according to effect on moisture extraction.
Simultaneously, according to cabinet refrigeration demand, refrigerated medium pump carries out frequency adjusting to natural cooling system mode more than executing, and leads to
Variable-flow application is crossed, adapts to cabinet heat load, stable operation in real time.When interior of equipment cabinet has dehumidification, controller is carried out certainly
Right cold expansion valve regulation, turns down valve opening, and indoor fan intelligently drops air quantity, dehumidifies；Simultaneously according to effect on moisture extraction, the is judged
Whether one enter or exit dehumidification mode to the cold expansion valve 643 of Third Nature.
Intelligent control method, intelligent controller according to the air inlet/outlet temperature difference and computer room indoor/outdoor temperature-difference of air-conditioning in cabinet,
The refrigeration demand of cabinet heat load is calculated, intellectual analysis judges whether have the condition for opening nature cooling system, and needs to open
Open the number of units of nature cooling system cabinet energy-saving type air conditioner.Frequency conversion refrigerated medium pump can be followed according to refrigeration demand intelligence output frequency, adjusting
Circulation meets the requirement of cabinet heat load cooling capacity；Freecooling condensation fan can change according to indoor refrigeration capacity requirement in real time
Intelligent speed-regulating is carried out, running speed is reduced or reduces runing time, utmostly utilizes outdoor cold source, it is more energy-efficient；Together
When pump circulation module controller communicated with air-conditioning own controller, detection cabinet environment whether have dehumidification, if need
Dehumidifying, which is then fed back, carries out expansion valve opening control, and the frequency that refrigerated medium pump reduces reduces flow output, and indoor fan reduces blower and turns
Speed, controller test and analyze real-time effect on moisture extraction according to humidity sensor, open or close air conditioner dehumidification function, and can intelligently into
Row refrigeration switches with dehumidified state.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
It should all belong to the protection domain of appended claims of the present invention with improvement or transformation based on the above description technical solution.
Claims (9)
1. a kind of multi-joint rack energy-saving air conditioning system, including fluid reservoir and the natural cooling condenser being separately connected with fluid reservoir
And refrigerated medium pump, it is characterised in that: including share the first evaporator, the second evaporator and third evaporator compressor assembly and
Natural cooling system；
The natural cooling condenser pass through respectively second solenoid valve, the 4th solenoid valve and the 6th solenoid valve respectively be set to room
Interior the first evaporator, the second evaporator are connected with third evaporator；
The refrigerated medium pump passes through the first solenoid valve, third solenoid valve and the 5th solenoid valve respectively and that outdoor first is arranged in is cold
Condenser, the second condenser are connected with third condenser；
First evaporator is connect with the first condenser, and second evaporator is connect with second condenser, and described
Three evaporators are connect with third condenser；
First gas-liquid separator, the first condenser, the first oil eliminator, the first compressor and the first gas-liquid separator head and the tail connect
It connects；
Second gas-liquid separator, the second condenser, the second oil eliminator, the second compressor and the second gas-liquid separator head and the tail connect
It connects；
Third gas-liquid separator, third condenser, third oil eliminator, third compressor and third gas-liquid separator head and the tail connect
It connects.
2. a kind of control method suitable for multi-joint rack energy-saving air conditioning system described in claim 1, it is characterised in that:
When having refrigeration demand in cabinet and cabinet return air temperature is less than 10 DEG C of outdoor environment return air temperature or more, the first pressure of control
The operation of contracting machine is simultaneously run in the frequency of the first compressor to the operation of the second compressor is controlled when limiting frequency range, is transported to the second compressor
Row is delayed to after limiting frequency range and detects cabinet refrigeration demand, is judged whether to run third compressor according to refrigeration demand, simultaneously
It closes the first to the 6th solenoid valve, close refrigerated medium pump and natural cooling fan, open first to third condenser.
3. the control method of the multi-joint rack energy-saving air conditioning system according to claim 2, which is characterized in that also wrap
It includes:
When having refrigeration demand in cabinet and outdoor temperature is lower than 10 DEG C of cabinet air conditioner return air temperature or more, starting refrigerated medium pump,
First solenoid valve, second solenoid valve, the first evaporator control the first electric expansion valve standard-sized sheet；Delay detection cabinet refrigeration demand,
Third solenoid valve, the 4th solenoid valve, the second evaporator are opened when having refrigeration demand, controls the second electric expansion valve；It is delayed again
Cabinet refrigeration demand is detected, opens the 5th solenoid valve and the 6th solenoid valve when having refrigeration demand.
4. the control method of the multi-joint rack energy-saving air conditioning system according to claim 3, which is characterized in that also wrap
It includes:
Refrigerated medium pump running frequency is adjusted according to cabinet refrigeration demand, and cabinet load is adapted to by variable-flow application in real time；
When there is dehumidification in cabinet, one or more control valve opening sizes of the control first into third expansion valve, root
Judge according to effect on moisture extraction and controls whether first enter to third expansion valve or exit dehumidifying shaping modes.
5. a kind of multi-joint rack energy-saving air conditioning system, including fluid reservoir and the natural cooling condenser being separately connected with fluid reservoir
And refrigerated medium pump, it is characterised in that: including compressor assembly, natural cooling system and hybrid system, the naturally cold evaporator with
The compressor evaporator is mounted side by side, and shares indoor fan；
The natural cooling condenser passes through the first solenoid valve, second solenoid valve and third solenoid valve respectively with setting in room respectively
The naturally cold evaporator of interior first, the cold evaporator of the second nature are connected with the cold evaporator of Third Nature；
The refrigerated medium pump passes through the first naturally cold expansion valve, the cold expansion valve of the second nature and the cold expansion valve of Third Nature point respectively
It is not connect with setting the first naturally cold evaporator, the cold evaporator of the second nature and the cold evaporator of Third Nature indoors；
It further include sequentially connected first evaporator, the first compressor, the first condenser, the first expansion valve；Sequentially connected
Two evaporators, the second compressor, the second condenser, the second expansion valve；Third evaporator, third compressor, third condenser,
Three expansion valves；
The nature cooling system includes the refrigerated medium pump being sequentially connected end to end, the first solenoid valve, the first naturally cold expansion valve, first
Naturally cold evaporator, natural cool condenser and fluid reservoir.
6. a kind of control method suitable for multi-joint rack energy-saving air conditioning system described in claim 5, it is characterised in that:
When having refrigeration demand in cabinet and cabinet return air temperature is less than 7 DEG C of outdoor environment return air temperature or more, the first pressure of control
The operation of contracting machine is simultaneously run in the frequency of the first compressor to the operation of the second compressor is controlled when limiting frequency range, is transported to the second compressor
Row is delayed to after limiting frequency range and detects cabinet refrigeration demand, runs third compressor according to refrigeration demand, simultaneously closes off first
To third solenoid valve, refrigerated medium pump and natural cooling fan are closed, opens first to third condenser.
7. the control method of the multi-joint rack energy-saving air conditioning system according to claim 6, which is characterized in that also wrap
It includes:
When having refrigeration demand in cabinet and outdoor temperature is lower than 7 DEG C of cabinet air conditioner return air temperature or more, first is opened to third
Natural expansion valve, control refrigerated medium pump are limiting frequency range operation, the cold condenser fan operation of control nature；It is delayed and detects cabinet system
Cold demand opens the with compressor when having a refrigeration demand；First compressor is run to delay detects cabinet again when limiting frequency range
Refrigeration demand runs the second compressor and third compressor according to refrigeration demand.
8. the control method of the multi-joint rack energy-saving air conditioning system according to claim 7, which is characterized in that also wrap
It includes:
When having refrigeration demand in cabinet and outdoor temperature is greater than 7 DEG C lower than the cabinet air conditioner return air temperature temperature difference, refrigerant is opened
Pump, the first solenoid valve, the first naturally cold evaporator, delay detection cabinet refrigeration demand, open the second electromagnetism when having refrigeration demand
The cold evaporator of valve, the second nature, the cold expansion valve of the second nature；Delay detection cabinet refrigeration demand again, is opened when having refrigeration demand
Open third solenoid valve.
9. the control method of the multi-joint rack energy-saving air conditioning system according to claim 8, which is characterized in that also wrap
It includes:
Refrigerated medium pump running frequency is adjusted according to cabinet refrigeration demand, and cabinet load is adapted to by variable-flow application in due course；
When there is dehumidification in cabinet, one or more control valve openings of the control first into the cold expansion valve of Third Nature are big
It is small, judge and control first whether enter or exit dehumidifying shaping modes to the cold expansion valve of Third Nature according to effect on moisture extraction.
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| CN116182338B (en) * | 2021-11-26 | 2025-12-23 | 维谛技术有限公司 | Machine room air conditioner, operation control method and operation control device thereof |
| CN115355562A (en) * | 2022-08-23 | 2022-11-18 | 中科绿能(深圳)实业集团有限公司 | Full-time natural cooling refrigeration multi-connected air conditioning unit and control method |
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