CN109654661A - A kind of double cold source operation of air conditioner fault-tolerant control systems and method - Google Patents
A kind of double cold source operation of air conditioner fault-tolerant control systems and method Download PDFInfo
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- CN109654661A CN109654661A CN201811569671.4A CN201811569671A CN109654661A CN 109654661 A CN109654661 A CN 109654661A CN 201811569671 A CN201811569671 A CN 201811569671A CN 109654661 A CN109654661 A CN 109654661A
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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
- 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
- F24F11/32—Responding to malfunctions or emergencies
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- 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
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention provides a kind of double cold source operation of air conditioner fault-tolerant control systems, compressor and chilled water system are run with cascade mode, chilled water system is provided with freezing water valve, temperature sensor is equipped in air-conditioning, the route of compressor is equipped with voltage check device, and voltage check device, freezing water valve and temperature sensor are connected to controller；More units form a group using shielded communication line ring connection of handing in hand, and carry out team control communication using CAN bus between unit, each unit respectively connected the controller of air-conditioning.The present invention also provides the control methods of above-mentioned double cold source operation of air conditioner fault-tolerant control systems.Fault-tolerant control system and method for the invention, pass through fault detection, accident analysis and reparation, the double cold sources of air-conditioning are redistributed according to fault condition come the refrigeration of compressor and chilled water system, to ensure the safety and refrigeration stability of entire air-conditioning system, it realizes and active process is carried out to the failure of generation, there is very high flexibility.
Description
Technical field
The present invention relates to a kind of double cold source operation of air conditioner fault-tolerant control systems and methods, belong to operation of air conditioner faults-tolerant control skill
Art field.
Background technique
Double cold sources and single cold source are that two kinds of refrigeration modes of air-conditioning have very to guarantee the economy and safety of system
Design the case that Cooling and Heat Source in pairs or a variety of Cooling and Heat Sources are used in combination more.
Single cooler room air-conditioning is also known as base station air conditioner, and unit is transmitted to outdoor air by condenser from room draw heat
In.After units' installation, indoor units constitute closed circuit in outdoor condenser.It is quick and easy for installation, it is lacked suitable for water source
The place in weary area and no-cooling-water system.
Double cold sources are compared to the advantages of single cold source: energy conservation, (IPLV is super for the high temperature cold water unit that Energy Efficiency Ratio can be made full use of high
It crosses 9), whole system is compared with 25% or more conventional air conditioning system energy conservation；Air quality is high, and temperature and humidity is separately adjustable, and indoor end is dry
Operating condition operation, generates without condensed water, will not breed bacterium, causes air conditioner disease.In hotel, hospital, office building, Electronics Factory, cigarette
There is extraordinary application prospect in the large spaces public place such as factory, pharmaceutical factory.The application characteristic of double cold source systems: first is that it is adaptable,
Has the flexible type of cooling.Second is that dual system is mutually backups, high safety and reliability.
Summary of the invention
The present invention is for deficiency existing for single cold source now, the advantages of using double cold sources, provides a kind of double cold source air-conditionings and transports
Row fault tolerant control method enables double cold sources flexibly to switch and use.
The technical scheme to solve the above technical problems is that a kind of double cold source operation of air conditioner fault-tolerant control systems, including
More units, compressor and chilled water system；
The compressor and the chilled water system are run with cascade mode, and the chilled water system is provided with adjustable aperture
Water valve is freezed, temperature sensor is equipped in air-conditioning, the route of the compressor is equipped with voltage check device, the voltage detecting
Device, the freezing water valve and the temperature sensor are connected to controller；
The more units form a group using shielded communication line ring connection of handing in hand, total using CAN between the unit
Line carries out team control communication, and each unit respectively connected the controller of air-conditioning.
The present invention is further arranged to, and the compressor is connected to alternating current and oil machine, and the oil machine is connected to EPS power supply,
Oil machine in the present invention is diesel-driven generator.
The present invention also provides the control methods of above-mentioned double cold source operation of air conditioner fault-tolerant control systems, comprising the following steps:
The temperature value of specific position in presetting air-conditioning；
The temperature detection value of the temperature sensor output of specific location is obtained, and compares presetting temperature value, calculates refrigeration
Demand；
According to the size of refrigeration demand, determine to run using compressor operation and/or chilled water system, and, the aperture of operation.
The present invention is further arranged to, and the fault tolerant control method includes:
First layer control, under normal circumstances, compressor normal operation can meet the needs of load is to cooling capacity, and chilled water is not
It needs to open；
Second layer control is that refrigeration demand is excessive, starting chilled water supplement refrigeration；When starting, compressor keeps full-load run, cold
Freeze water valve gradually to open greatly from standby aperture 50%, and according to refrigeration demand linear regulation in 50 ~ 100% sections, refrigeration demand is got over
Greatly, aperture is bigger.
The present invention is further arranged to, the calculation method of refrigeration demand are as follows: refrigeration demand=set temperature+adjusting sensitivity；
Refrigeration demand is -50 ~ 100%, compressor operation；Refrigeration demand is 120 ~ 200%, freezes water running；It is linear according to refrigeration demand
Aperture is calculated, chilled water valve opening range is 50 ~ 100%, and exports 0 ~ 10V control voltage and be given to freezing water valve, to realize water
Valve opening is adjusted.
The present invention is further arranged to, and the fault tolerant control method includes third layer control, and third layer control includes compression
Machine own system failure and failover procedure, and, compressor power failure failure and failover procedure；
The compressor own system failure and failover procedure are as follows: compressor stops, and is unable to satisfy refrigerating capacity, in temperature
It rises, refrigeration demand increases, and when increase in demand is to 120%, freezing water valve starts from 50% aperture automatically to be run, according to refrigeration demand
It gradually opens greatly, and is adjusted in 50 ~ 100% sections according to load linearity, load is bigger, and aperture is bigger；
After compressor assembly fault recovery, freezing water valve keeps current aperture, and opens compressor, due to the starting of compressor,
Refrigeration demand reduces, and freezing water valve is gradually reduced from current larger opening according to demand, finally maintains standby aperture 50%；
The compressor power failure failure and failover procedure: commercial power interruption and corresponding EPS power failure cause to press
Contracting machine power failure, compressor stop, and system trigger line under-voltage alerts, and since refrigeration demand increases, work as refrigeration demand
When rising to 120%, freezing water valve starts from 50% aperture automatically to be run, and is gradually opened according to refrigeration demand greatly, and in 50th ~ 100% area
Interior to be adjusted according to load linearity, load is bigger, and aperture is bigger；
After compressor power failure is restored, line under-voltage alarm is released, and freezing water valve keeps current aperture, and opens compressor,
Due to the starting of compressor, refrigeration demand is reduced, and freezing water valve is gradually reduced from current larger opening according to demand, final to maintain
In standby aperture 50%.
The present invention is further arranged to, and the fault tolerant control method includes four-layer, and the four-layer is used for
Chilled water system paralysis, commercial power interruption failure；
For there is the unit of EPS power supply guarantee: when failure, freezing water valve keeps standby aperture 50%, and compressor remains operational,
During EPS power supply run with load, oil start, power switching to oil machine, the standby aperture 50% of air-conditioning water valve holding, compressor
It remains operational；Whole process air-conditioner set keeps previous moment normal operating condition.When fault recovery, water valve keeps standby and opens
Degree 50%, oil machine band carry, and compressor remains operational, city power recovery, are switched to mains-supplied, and air-conditioning water valve keeps standby aperture
50%, compressor remains operational；Whole process air-conditioner set keeps previous moment normal operating condition；
The unit of compressor is ensured for no EPS power supply: when failure, after power failure, compressor stops, and system trigger electricity
Source undervoltage alarm, since refrigeration demand increases, when refrigeration demand rises to 120%, freezing water valve starts from 50% aperture automatically
Operation is gradually opened greatly according to refrigeration demand, and according to heat load linear regulation in 50 ~ 100% sections, heat load is bigger, aperture
It is bigger；Chilled water paralysis, cannot provide cooling capacity, and the final water valve that freezes can reach 100%.When fault recovery, powered with compressor
Disconnected reforestation practices operation, i.e., after compressor power failure is restored, line under-voltage alarm is released, and freezing water valve keeps current aperture,
And compressor is opened, due to the starting of compressor, refrigeration demand is reduced, and refrigeration water valve gradually subtracts from 100% aperture according to demand
It is small, finally maintain standby aperture 50%.
The present invention is further arranged to, more units share respective compressor state, chilled water system state and itself
Operating status, each unit can obtain the air-conditioned state of institute by bus, and judge the operating status of itself, to realize
It cooperates；
Unit is divided into 2 or more hosts and 2 or more standby host:
When standby host detection, which determines system, high temperature alarm or excessively high whole system mean temperature occurs, then host fortune is switched to
Row；
When standby host detects faulty unit in group, then host operation is automatically switched to；
When unit obtain less than other units bus data for a period of time after, accuse team control communication failure；When team control goes offline, fall
Line unit is switched to single cpu mode.
The present invention is further arranged to, and the fault tolerant control method further includes humidifying Dehumidification controlling and fault detection, described
Humidification Dehumidification controlling and fault detection include:
Every unit carries out Humidity Detection, and carries out humid control according to the humidity of itself detection:
When ambient humidity > setting humidity, humidifying mode is closed, under humidifying mode, humidifier is closed and stops humidification；
When ambient humidity > (setting humidity+setting Humidity Sensitivity), dehumidification mode is opened, under dehumidification mode, compressor is opened
It opens, blower reduces revolving speed and dehumidifies；
When ambient humidity < setting humidity, dehumidification mode is exited, such as without refrigeration demand, then close compressor, needs if any refrigeration
It asks, is then run by refrigeration mode, revolving speed is run blower in a chiller mode；
When ambient humidity < (setting humidity-setting Humidity Sensitivity), humidifying mode is opened, under humidifying mode, open humidifier
It is humidified；
Humidifier can detect humidification electric current, and humidifier failure is then accused when detecting current anomaly；When humidifier failure, unit is protected
Hold normal operation.
The present invention is further arranged to, and the fault tolerant control method further includes freezing water valve control and fault detection, described
The control of freezing water valve and fault detection include: when compressor refrigeration is unable to satisfy refrigeration cooling capacity, and environment temperature persistently increases, then
It opens freezing water valve and carries out supplement refrigeration, the control of chilled water valve opening calculates aperture according to pid algorithm, is setting when by temperature control
In fixed point, freezing is accused if deviation is excessive by the opening amount signal of comparison freezing water valve feedback and the corresponding relationship of control signal
Water valve failure, standby host start assisted refrigeration.
The present invention is further arranged to, and the fault tolerant control method further includes rotation speed of fan control and fault detection, described
Rotation speed of fan control and fault detection include:
Return air or supply air temperature control may be selected in blower, such as when return air control, when return air temperature < setting temperature control blower
Lower limit rotating speed, when return air temperature > setting temperature control blower+sensitivity, the blower upper limit turns.0-10V is exported by controller
Voltage adjusts rotation speed of fan.
When fan trouble, a fault-signal can be exported and be given to controller, controller judges the signal to accuse blower event
Barrier alarm.When detecting unit fan trouble, then other normal fan speed increasings, supplement air quantity.If triggering excess temperature or group in the process
Group overheat, then standby host starts assisted refrigeration.
The present invention is further arranged to, and the detection of the compressor fault, which is crossed, to be known as: detecting delivery temperature, system height
Pressure is judged as breakdown of refrigeration system when being in abnormal ranges, accuse exhaust excess temperature alarm, high-low pressure alarm, and refrigeration system is accused extremely
Police is to indicate compressor fault.When compressor fault, compressor can not provide cooling capacity output, and temperature can rise, and water valve starting is mended
Fill refrigeration.If triggering high temperature alarm in the process, standby host starts assisted refrigeration.
The present invention is further arranged to, and when controller detects that sensor voltage range transfinites, is accused sensor fault and is accused
It is alert.When controlling Temperature Failure, unit is run with maximum cooling capacity, avoids computer room high temperature.
The present invention is further arranged to, and when water immersion switch encounters water, can give one dry contact signal of controller, controller
Accuse water damage alarm.After water damage alarm, compressor emergency shutdown.
Fault-tolerant control system and method for the invention, by fault detection, accident analysis and reparation, so that the double cold sources of air-conditioning
It can be redistributed according to fault condition come the refrigeration of compressor and chilled water system, to ensure entire air-conditioning system
Safety and refrigeration stability, realize and carry out active process to the failure of generation, have very high flexibility.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the aperture regulation figure of the freezing water valve under operating normally；
Fig. 2 is the aperture regulation figure of freezing water valve when breaking down；
Fig. 3, Fig. 5, Fig. 7, Fig. 9 are operational process when breaking down；
Fig. 4, Fig. 6, Fig. 8, Figure 10 are the operational process of fault recovery；
Figure 11 is the operational process into dehumidification mode；
Figure 12 is the operational process for exiting dehumidification mode；
Figure 13 is the relational graph for freezing water valve and refrigeration demand；
Figure 14 is rotation speed of fan and blower demand figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As an embodiment of the present invention, a kind of double cold source operation of air conditioner fault-tolerant control systems, including more units, pressure
Contracting machine and chilled water system.Compressor and chilled water system are run with cascade mode, and chilled water system is provided with adjustable aperture
Freezing water valve, be equipped with temperature sensor in air-conditioning, the route of compressor is equipped with voltage check device, voltage check device,
Freezing water valve and temperature sensor are connected to controller.More units using shielded communication line hand in hand ring connection form one
Group carries out team control communication using CAN bus between unit, and each unit respectively connected the controller of air-conditioning, and air conditioner in machine room is more
A unit is with standard MODBUS protocol integration BA system.
Above-mentioned controller setting includes: two sets of team control controllers, and, a set of unit control is arranged in every set cold unit
Device.Two sets of team control controllers are divided into a master controller, and one uses hot standby mode from controller, master controller and from controller
Carry out redundancy；Team control controller is connect with the signal transmission form of remaining element controller using TCP/IP and hardwire mode.
All controllers, motor-driven valve control cabinet be required to using two-way UPS power, Dual-power automatic switching is done in control cabinet.
Team control controller is set as 2 independent network controllers, and hot standby mutually between two controllers, by using
Heartbeat detection；Master controller is usually run, after detecting master controller fault from controller, is carried out immediately using from controller
The control of cold unit and water pump of air conditioner frequency, the program of two network controllers are answered completely the same.When the failure of master controller
It removes, after heartbeat signal restores, needs operator's hand-reset, back switch to master controller.It should be to from controller before switching
Master controller sends data packet and carrys out synchronously control operating status.After synchronously completing, master controller should release news and remind operator
Member starts to switch.
More units share respective compressor state, chilled water system state and self-operating state, and each unit is equal
The air-conditioned state of institute can be obtained by bus, and judges the operating status of itself, to realize collaborative work.Unit is divided into 2
The above host of platform and 2 or more standby host, such as 10 hosts and 2 standby hosts.When standby host detection determine system occur high temperature alarm or
When whole system mean temperature is excessively high, then host operation is switched to；When standby host detects faulty unit in group, then automatically
It is switched to host operation；When unit obtain less than other units bus data for a period of time after, accuse team control communication failure；Work as group
When control goes offline, the unit that goes offline is switched to single cpu mode, is such as originally standby host, then is switched to host operation, is such as originally host, then
Remain host operation.As the power output device of compressor, compressor is connected to alternating current and oil machine, and oil machine is connected to EPS
Power supply.
The present invention also provides the control methods of above-mentioned double cold source operation of air conditioner fault-tolerant control systems, comprising the following steps:
The temperature value of specific position in presetting air-conditioning；The temperature detection value of the temperature sensor output of specific location is obtained, and right
Than presetting temperature value, refrigeration demand is calculated；According to the size of refrigeration demand, determine to run and/or freeze using compressor
Water system operation, and, the aperture of operation.
Specifically, the method for above-mentioned double cold source operation of air conditioner faults-tolerant controls includes:
First layer control, under normal circumstances, compressor normal operation can meet the needs of load is to cooling capacity, and chilled water is not
It needs to open, referring to Fig. 1；
Second layer control is that refrigeration demand is excessive, starting chilled water supplement refrigeration；When starting, compressor keeps full-load run, cold
Freeze water valve gradually to open greatly from standby aperture 50%, and according to refrigeration demand linear regulation in 50 ~ 100% sections, refrigeration demand is got over
Greatly, aperture is bigger, referring to fig. 2.
The calculation method of refrigeration demand are as follows: refrigeration demand=set temperature+adjusting sensitivity.Refrigeration demand is -50 ~ 100%,
Compressor operation；Refrigeration demand is 120 ~ 200%, freezes water running；Aperture is linearly calculated according to refrigeration demand, freezing water valve is opened
Spending range is 50 ~ 100%, and exports 0 ~ 10V control voltage and be given to freezing water valve, to realize water valve aperture regulation.For example it sets
Temperature is 20 DEG C, and degree of regulation is 2 DEG C；100% refrigeration demand point is 22 DEG C, and 50% refrigeration demand point is 21 DEG C.
As section Example of the invention, fault tolerant control method includes third layer control, and third layer control includes compression
Machine own system failure and failover procedure, and, compressor power failure failure and failover procedure.Wherein, it compresses
Machine own system failure and failover procedure are as follows: compressor stops, and is unable to satisfy refrigerating capacity, and temperature rises, refrigeration demand liter
Height, when increase in demand is to 120%, freezing water valve starts from 50% aperture automatically to be run, gradually opened according to refrigeration demand it is big, and
It is adjusted in 50 ~ 100% sections according to load linearity, load is bigger, and aperture is bigger.After compressor assembly fault recovery, water valve is freezed
Current aperture is kept, and opens compressor, due to the starting of compressor, refrigeration demand is reduced, and freezing water valve is according to demand from working as
Preceding larger opening gradually reduces, and finally maintains standby aperture 50%；
Compressor power failure failure and failover procedure: commercial power interruption and corresponding EPS power failure lead to compressor
Power failure, compressor stop, and system trigger line under-voltage alerts, since refrigeration demand increases, when refrigeration demand rises
When to 120%, freezing water valve starts from 50% aperture automatically to be run, gradually opened according to refrigeration demand it is big, and in 50 ~ 100% sections
It is adjusted according to load linearity, load is bigger, and aperture is bigger.After compressor power failure is restored, line under-voltage alarm is released, freezing
Water valve keeps current aperture, and opens compressor, and due to the starting of compressor, refrigeration demand is reduced, and freezing water valve is according to demand
It is gradually reduced from current larger opening, finally maintains standby aperture 50%.
The detection of above-mentioned compressor fault, which is crossed, to be known as: detecting that delivery temperature, system high-low pressure are in abnormal ranges
When be judged as breakdown of refrigeration system, accuse exhaust excess temperature alarm, high-low pressure alarm, refrigeration system abnormality alarming indicating compressor therefore
Barrier.When compressor fault, compressor can not provide cooling capacity output, and temperature can rise, water valve starting supplement refrigeration.If touching in the process
High temperature alarm is sent out, then standby host starts assisted refrigeration.
It for the various fault conditions being likely to occur, is detailed below, for example, for only refrigeration system paralysis
Paralysis, when failure: unit keeps current compressor operating status, and freezing water valve keeps standby aperture 50%, aperture regulation such as Fig. 1 institute
Show, operational process is as shown in Figure 3.When fault recovery: unit keeps current compressor operating status, and freezing water valve keeps standby and opens
Degree 50%, aperture regulation is as shown in Figure 1, operational process is as shown in Figure 4.
As a preferred embodiment of the present invention, fault tolerant control method includes four-layer, and four-layer is used for
Chilled water system paralysis, commercial power interruption failure, be divided into the unit for having EPS power supply guarantee and the unit without EPS power supply guarantee.
For there is the unit of EPS power supply guarantee, in failure: referring to Fig. 5, freezing water valve and keep standby aperture 50%, compression
Machine remains operational, and during EPS power supply run with load, oil start, power switching to oil machine, the holding of air-conditioning water valve is standby to be opened
Degree 50%, compressor remains operational；Whole process air-conditioner set keeps previous moment normal operating condition.In fault recovery:
Referring to Fig. 6, water valve keeps standby aperture 50%, and oil machine band carries, and compressor remains operational, and city power recovery is switched to mains-supplied,
Air-conditioning water valve keeps standby aperture 50%, and compressor remains operational；Whole process air-conditioner set keeps previous moment to operate normally
State；
No EPS power supply ensures the unit of compressor, in failure: referring to Fig. 7, after power failure, compressor stops, and system
Line under-voltage alarm is triggered, since refrigeration demand increases, when refrigeration demand rises to 120%, freezing water valve is opened from 50% automatically
Degree starting operation, is gradually opened greatly, and according to heat load linear regulation in 50 ~ 100% sections, heat load is got over according to refrigeration demand
Greatly, aperture is bigger；Chilled water paralysis, cannot provide cooling capacity, and the final water valve that freezes can reach 100%.In fault recovery: referring to
Fig. 8, with the operation of compressor power failure reforestation practices, i.e., after compressor power failure is restored, line under-voltage alarm is released, freezing
Water valve keeps current aperture, and opens compressor, and due to the starting of compressor, refrigeration demand is reduced, and refrigeration water valve is according to demand
It is gradually reduced from 100% aperture, finally maintains standby aperture 50%.
As a preferred embodiment of the present invention, fault tolerant control method includes layer 5 control, and layer 5 control is used for
The failure of commercial power interruption is divided into the unit for having EPS power supply guarantee and the unit without EPS power supply guarantee.
For there is EPS to ensure the unit of compressor, in failure: water valve keeps standby aperture 50%, and compressor keeps fortune
Row, during EPS run with load, 90 seconds oil starts, power switching to oil machine, the standby aperture 50% of air-conditioning water valve holding, pressure
Contracting machine remains operational.Whole process air-conditioner set keeps previous moment normal operating condition.As shown in Figure 5.In fault recovery
When: water valve keeps standby aperture 50%, and oil machine band carries, and compressor remains operational, and city power recovery is switched to mains-supplied, air conditioner water
Valve keeps standby aperture 50%, and compressor remains operational.Whole process air-conditioner set keeps previous moment normal operating condition.
As shown in Figure 6.
The unit that compressor is ensured for no EPS, in failure: referring to Fig. 9, with press power failure mode operation, i.e.,
After power failure, compressor stops, and system trigger line under-voltage alerts, since refrigeration demand increases, when increase in demand is arrived
When 120%, chilled water starts from 50% aperture automatically to be run, and is gradually opened according to refrigeration demand greatly, and the basis in 50 ~ 100% sections
Load linearity is adjusted, and load is bigger, and aperture is bigger.As shown in the figure.When fault recovery: referring to Figure 10, with compressor power failure
Reforestation practices operation, i.e., after compressor power failure is restored, line under-voltage alarm is released, and freezing water valve keeps current aperture, and
Compressor is opened, due to the starting of compressor, refrigeration demand is reduced, and water valve is gradually reduced from current larger opening according to demand,
Finally maintain standby aperture 50%.As shown in the figure.
As a preferred embodiment of the present invention, referring to Figure 11 and Figure 12, fault tolerant control method further includes humidification dehumidifying
Control and fault detection, humidify Dehumidification controlling and fault detection includes:
Every unit carries out Humidity Detection, and carries out humid control according to the humidity of itself detection:
When ambient humidity > setting humidity, humidifying mode is closed, under humidifying mode, humidifier is closed and stops humidification；
When ambient humidity > (setting humidity+setting Humidity Sensitivity), dehumidification mode is opened, under dehumidification mode, compressor is opened
It opens, blower reduces revolving speed and dehumidifies；
When ambient humidity < setting humidity, dehumidification mode is exited, such as without refrigeration demand, then close compressor, needs if any refrigeration
It asks, is then run by refrigeration mode, revolving speed is run blower in a chiller mode；
When ambient humidity < (setting humidity-setting Humidity Sensitivity), humidifying mode is opened, under humidifying mode, open humidifier
It is humidified；
Humidifier can detect humidification electric current, and humidifier failure is then accused when detecting current anomaly；When humidifier failure, unit is protected
Normal operation is held, only itself can not continue to humidify.
Fault tolerant control method further includes the control of freezing water valve and fault detection, referring to Figure 13, the control of freezing water valve and failure
Detection includes: when compressor refrigeration is unable to satisfy refrigeration cooling capacity, and environment temperature persistently increases, then opens freezing water valve and mended
Refrigeration is filled, the control of chilled water valve opening calculates aperture according to pid algorithm, controls on set point when by temperature, cold by comparing
Freeze the opening amount signal of water valve feedback and the corresponding relationship of control signal, if deviation is excessive, accuses freezing water valve failure, standby host starting
Assisted refrigeration.
Air conditioner in machine room of the invention as unit of computer room carry control system unit, usually run it is primary with air-cooled mode,
In addition to spare double cold source air-conditionings, run with air cooling system；The freezing water valve of double cold source air conditioning water systems, can be selected electronic
It is adjustable that two-way valve opening is maintained at 20%(), the control model of double cold sources is shown in above description.As a preferred implementation of the invention
Example, referring to Figure 14, fault tolerant control method further includes rotation speed of fan control and fault detection, and rotation speed of fan controls and fault detection packet
It includes:
Return air or supply air temperature control may be selected in blower, such as when return air control, when return air temperature < setting temperature control blower
Lower limit rotating speed, when return air temperature > setting temperature control blower+sensitivity, the blower upper limit turns.0-10V is exported by controller
Voltage adjusts rotation speed of fan.
When fan trouble, a fault-signal can be exported and be given to controller, controller judges the signal to accuse blower event
Barrier alarm.When detecting unit fan trouble, then other normal fan speed increasings, supplement air quantity.If triggering excess temperature or group in the process
Group overheat, then standby host starts assisted refrigeration.
When controller detects that the voltage ranges of temperature sensor or other detection sensors transfinites, sensor fault is accused
Alarm.When controlling Temperature Failure, unit is run with maximum cooling capacity, avoids computer room high temperature.When controller failure, stop this machine
Group operation, starts standby host.
When water immersion switch encounters water, one dry contact signal of controller can be given, controller accuses water damage alarm.Water damage alarm
Afterwards, compressor emergency shutdown can be configured as not shutting down.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of double cold source operation of air conditioner fault-tolerant control systems, which is characterized in that including more units, compressor and freezing water system
System；
The compressor and the chilled water system are run with cascade mode, and the chilled water system is provided with adjustable aperture
Water valve is freezed, temperature sensor is equipped in air-conditioning, the route of the compressor is equipped with voltage check device, the voltage detecting
Device, the freezing water valve and the temperature sensor are connected to controller；
The more units form a group using shielded communication line ring connection of handing in hand, total using CAN between the unit
Line carries out team control communication, and each unit respectively connected the controller of air-conditioning.
2. double cold source operation of air conditioner fault-tolerant control systems according to claim 1, which is characterized in that the compressor connection
Alternating current and oil machine, the oil machine be connected to EPS power supply.
3. the control method of double cold source operation of air conditioner fault-tolerant control systems according to claim 1 or 2, which is characterized in that
The following steps are included:
The temperature value of specific position in presetting air-conditioning；
The temperature detection value of the temperature sensor output of specific location is obtained, and compares presetting temperature value, calculates refrigeration
Demand；
According to the size of refrigeration demand, determine to run using compressor operation and/or chilled water system, and, the aperture of operation.
4. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the faults-tolerant control side
Method includes:
First layer control, under normal circumstances, compressor normal operation can meet the needs of load is to cooling capacity, and chilled water is not
It needs to open；
Second layer control is that refrigeration demand is excessive, starting chilled water supplement refrigeration；When starting, compressor keeps full-load run, cold
Freeze water valve gradually to open greatly from standby aperture 50%, and according to refrigeration demand linear regulation in 50 ~ 100% sections, refrigeration demand is got over
Greatly, aperture is bigger.
5. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the calculating of refrigeration demand
Method are as follows: refrigeration demand=set temperature+adjusting sensitivity；Refrigeration demand is -50 ~ 100%, compressor operation；Refrigeration demand is
120 ~ 200%, freeze water running；Aperture is linearly calculated according to refrigeration demand, chilled water valve opening range is 50 ~ 100%, and is exported
0 ~ 10V control voltage is given to freezing water valve, to realize water valve aperture regulation.
6. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the faults-tolerant control side
Method includes third layer control, and third layer control includes compressor own system failure and failover procedure, and, compressor supplies
Electric outage and failover procedure；
The compressor own system failure and failover procedure are as follows: compressor stops, and is unable to satisfy refrigerating capacity, in temperature
It rises, refrigeration demand increases, and when increase in demand is to 120%, freezing water valve starts from 50% aperture automatically to be run, according to refrigeration demand
It gradually opens greatly, and is adjusted in 50 ~ 100% sections according to load linearity, load is bigger, and aperture is bigger；
After compressor assembly fault recovery, freezing water valve keeps current aperture, and opens compressor, due to the starting of compressor,
Refrigeration demand reduces, and freezing water valve is gradually reduced from current larger opening according to demand, finally maintains standby aperture 50%；
The compressor power failure failure and failover procedure: commercial power interruption and corresponding EPS power failure cause to press
Contracting machine power failure, compressor stop, and system trigger line under-voltage alerts, and since refrigeration demand increases, work as refrigeration demand
When rising to 120%, freezing water valve starts from 50% aperture automatically to be run, and is gradually opened according to refrigeration demand greatly, and in 50th ~ 100% area
Interior to be adjusted according to load linearity, load is bigger, and aperture is bigger；
After compressor power failure is restored, line under-voltage alarm is released, and freezing water valve keeps current aperture, and opens compressor,
Due to the starting of compressor, refrigeration demand is reduced, and freezing water valve is gradually reduced from current larger opening according to demand, final to maintain
In standby aperture 50%.
7. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the faults-tolerant control side
Method includes four-layer, and the four-layer is for chilled water system paralysis, the failure of commercial power interruption；
For there is the unit of EPS power supply guarantee:
When failure: freezing water valve keeps standby aperture 50%, and compressor remains operational, during EPS power supply run with load, oil
Machine starting, power switching to oil machine, air-conditioning water valve keep standby aperture 50%, and compressor remains operational；Whole process air-conditioner set
Keep previous moment normal operating condition；
When fault recovery: water valve keeps standby aperture 50%, and oil machine band carries, and compressor remains operational, and city power recovery is switched to city
Electricity power supply, air-conditioning water valve keep standby aperture 50%, and compressor remains operational；Whole process air-conditioner set keeps previous moment
Normal operating condition；
No EPS power supply ensures the unit of compressor:
When failure: after power failure, compressor stops, and system trigger line under-voltage alerts, since refrigeration demand increases, when
When refrigeration demand rises to 120%, freezing water valve starts from 50% aperture automatically to be run, and is gradually opened according to refrigeration demand greatly, and
According to heat load linear regulation in 50 ~ 100% sections, heat load is bigger, and aperture is bigger；Chilled water paralysis, cannot provide cooling capacity,
Final freezing water valve can reach 100%；
When fault recovery: with the operation of compressor power failure reforestation practices, i.e., after compressor power failure is restored, line under-voltage is accused
Alert to release, freezing water valve keeps current aperture, and opens compressor, and due to the starting of compressor, refrigeration demand is reduced, chilled water
Valve is gradually reduced from 100% aperture according to demand, finally maintains standby aperture 50%.
8. double cold source operation of air conditioner fault tolerant control methods according to claim 7, which is characterized in that
More units share respective compressor state, chilled water system state and self-operating state, and each unit can lead to
It crosses bus and obtains the air-conditioned state of institute, and judge the operating status of itself, to realize collaborative work；
Unit is divided into 2 or more hosts and 2 or more standby host:
When standby host detection, which determines system, high temperature alarm or excessively high whole system mean temperature occurs, then host fortune is switched to
Row；
When standby host detects faulty unit in group, then host operation is automatically switched to；
When unit obtain less than other units bus data for a period of time after, accuse team control communication failure；When team control goes offline, fall
Line unit is switched to single cpu mode.
9. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the faults-tolerant control side
Method further includes humidification Dehumidification controlling and fault detection, the humidification Dehumidification controlling and fault detection include:
Every unit carries out Humidity Detection, and carries out humid control according to the humidity of itself detection:
When ambient humidity > setting humidity, humidifying mode is closed, under humidifying mode, humidifier is closed and stops humidification；
When ambient humidity > (setting humidity+setting Humidity Sensitivity), dehumidification mode is opened, under dehumidification mode, compressor is opened
It opens, blower reduces revolving speed and dehumidifies；
When ambient humidity < setting humidity, dehumidification mode is exited, such as without refrigeration demand, then close compressor, needs if any refrigeration
It asks, is then run by refrigeration mode, revolving speed is run blower in a chiller mode；
When ambient humidity < (setting humidity-setting Humidity Sensitivity), humidifying mode is opened, under humidifying mode, open humidifier
It is humidified；
Humidifier can detect humidification electric current, and humidifier failure is then accused when detecting current anomaly；When humidifier failure, unit is protected
Hold normal operation.
10. double cold source operation of air conditioner fault tolerant control methods according to claim 3, which is characterized in that the faults-tolerant control
Method further includes the control of freezing water valve and fault detection, and the freezing water valve control and fault detection include: to work as compressor refrigeration
When being unable to satisfy refrigeration cooling capacity, environment temperature is persistently increased, then opens freezing water valve and carry out supplement refrigeration, chilled water valve opening control
System according to pid algorithm calculate aperture, when by temperature control on set point, by comparison freezing water valve feedback opening amount signal with
The corresponding relationship for controlling signal accuses freezing water valve failure if deviation is excessive, and standby host starts assisted refrigeration.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110440391A (en) * | 2019-08-07 | 2019-11-12 | 珠海格力电器股份有限公司 | Loop network guard method, air-conditioning system |
| CN110673575A (en) * | 2019-09-10 | 2020-01-10 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
| CN114110916A (en) * | 2021-11-23 | 2022-03-01 | 珠海格力电器股份有限公司 | Air conditioner water valve operation state detection method and device, storage medium and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110440391A (en) * | 2019-08-07 | 2019-11-12 | 珠海格力电器股份有限公司 | Loop network guard method, air-conditioning system |
| CN110673575A (en) * | 2019-09-10 | 2020-01-10 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
| CN110673575B (en) * | 2019-09-10 | 2020-08-11 | 神华四川能源有限公司江油发电厂 | Power failure protection method for electric actuating mechanism and terminal equipment |
| CN114110916A (en) * | 2021-11-23 | 2022-03-01 | 珠海格力电器股份有限公司 | Air conditioner water valve operation state detection method and device, storage medium and air conditioner |
| CN114110916B (en) * | 2021-11-23 | 2023-02-28 | 珠海格力电器股份有限公司 | Air conditioner water valve operation state detection method and device, storage medium and air conditioner |
| CN115727579A (en) * | 2022-11-28 | 2023-03-03 | 江苏拓米洛环境试验设备有限公司 | Control method and device of refrigeration system |
| CN115727579B (en) * | 2022-11-28 | 2023-09-29 | 江苏拓米洛高端装备股份有限公司 | Control method and device of refrigerating system |
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