CN105674517A - Precise air conditioner energy saving device for machine room and energy-saving control method - Google Patents
Precise air conditioner energy saving device for machine room and energy-saving control method Download PDFInfo
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- CN105674517A CN105674517A CN201610225711.8A CN201610225711A CN105674517A CN 105674517 A CN105674517 A CN 105674517A CN 201610225711 A CN201610225711 A CN 201610225711A CN 105674517 A CN105674517 A CN 105674517A
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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
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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
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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
- F24F11/62—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
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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
- F24F11/72—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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a precise air conditioner energy saving device for a machine room. At least two air conditioners are arranged in the machine room, a first constant-frequency air compressor, a second constant-frequency air compressor, two constant-frequency fans, a temperature sensor and a control circuit are arranged in each air conditioner, and the temperature sensor and the control circuit are connected. The precise air conditioner energy saving device for the machine room comprises a cluster control controller, a bus and a variable-frequency control module, and the control circuits of the air conditioners are all connected with the communication ends of the cluster control controllers through the buses. Each variable-frequency control module comprises a rectifier connected to a working power supply, a first variable-frequency circuit connected with the rectifier, a second variable-frequency circuit connected with the rectifier and a third variable-frequency circuit connected with the rectifier. The precise air conditioner energy saving device has the advantages of achieving variable-frequency control of the first constant-frequency air compressor, the second constant-frequency air compressor and the two constant-frequency fans of each air conditioner and also achieving unified control of the multiple air conditioners in the machine room.
Description
Technical field
The present invention relates to precision air conditioner, be specifically related to a kind of precision air conditioner energy saver for machine room and energy-saving control method.
Background technology
Precision air conditioner refers to fully meet machine room Special precision air conditioner (also referred to as constant-temperature constant-humidity air-conditioner) that building environment condition requires, is the new machine grown up gradually in nearly 30 years. In prior art, at least precision air conditioner it is provided with in machine room, and in every air-conditioning, it is provided with the first fixed frequency air compressor, the second fixed frequency air compressor, two fixed frequency blower fans, temperature sensor and control circuits, temperature sensor is connected with control circuit, to detect the temperature of each air-conditioning position.
Owing to the first fixed frequency air compressor and the second fixed frequency air compressor are phase asynchronous fixed frequency alternating current generator, so its mode of operation is: stop, two states of work (namely 0 and 100% two duties), as long as there being the refrigeration demand of 1%, the motor of the first fixed frequency air compressor and the second fixed frequency air compressor is just operated in the duty of 100%. The shortcoming of invariable frequency compressor motor working method: 11) invariable frequency compressor motor long-term work is in full-speed state, and energy consumption is bigger; 12) frequent start and stop compressor, reduces compressor service life; 13) during frequent starting compressor, starting current is big, and during startup, energy consumption is very big, there is great energy waste.
The shortcoming of fixed frequency blower motor working method: 21) fixed frequency blower motor is phase asynchronous fixed frequency alternating current generator, mode of operation is the duty of full-speed operation in * 365 days in 24 hours, even if compressor of air conditioner does not work, time without refrigeration demand, blower fan is also maintained at the full speed operation state of 100%, the long-term full speed running of blower fan, energy consumption is big; 22) air quantity of blower fan output can not change with the duty of compressor, air quantity configuration inaccuracy.
Add, the precision air conditioner of more than three is had in a machine room, owing to the work of every precision air conditioner is all relatively independent, every precision air conditioner location is different, the temperature of each present position is different, if a position needs heating, another position needs refrigeration, the precision air conditioner being so in above-mentioned two position arises that the phenomenon of competition operation, inverted running, and simply air flowing will process this phenomenon, precision air conditioner works in such circumstances and arises that the consumption of unnecessary energy, causes the waste of energy.
Summary of the invention
For deficiency existing in prior art, the invention provides a kind of precision air conditioner energy saver for machine room and energy-saving control method, both achieved the VFC of the first invariable frequency compressor to each air-conditioning, the second invariable frequency compressor and two fixed frequency blower fans, achieved again being uniformly controlled of multiple stage air-conditioning in machine room.
For achieving the above object, present invention employs following technical scheme:
The present invention provides a kind of precision air conditioner energy saver for machine room, including team control controller, bus, VFC module and temperature sensor, temperature sensor is connected with the communication ends of team control controller, and the control circuit of air-conditioning is connected with the detection input of team control controller by bus, VFC module includes: the commutator of cut-in operation power supply, the first frequency changer circuit being connected with commutator, the second frequency changer circuit being connected with commutator and the 3rd frequency changer circuit being connected with commutator, first frequency changer circuit is for realizing the connection of the first fixed frequency air compressor and commutator and control circuit, second frequency changer circuit is for realizing the connection of the second fixed frequency air compressor and commutator and control circuit, 3rd frequency changer circuit is for realizing the connection of two fixed frequency blower fans and commutator and control circuit, first frequency changer circuit, second frequency changer circuit and the 3rd frequency changer circuit all include the converter being connected with commutator, conversion switch circuit and switching power circuit, conversion switch circuit is provided with the first power end, second source end, first controls end, second controls end and load end, first power end is connected with converter, second source end is connected with control circuit, load end connects the first fixed frequency air compressor, second fixed frequency air compressor or two fixed frequency blower fans, switching power circuit controls end with the second of conversion switch circuit and is connected, and be connected with frequency conversion input and the power frequency input of team control controller, with to the frequency conversion input of team control controller, power frequency input and second controls end provides Switching Power Supply, wherein, the control end of all converters is all connected with team control controller, to realize the VFC to the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans, the first of conversion switch circuit controls end and is connected with the outfan of team control controller, when the second control end of frequency conversion input and three conversion switch circuits all accesses Switching Power Supply, three converters are connected by three conversion switch circuits respectively with the first fixed frequency air compressor, the second fixed frequency air compressor and fixed frequency blower fan, to access variable-frequency power sources, when power frequency input accesses Switching Power Supply, control circuit is connected by three conversion switch circuits with the first fixed frequency air compressor, the second fixed frequency air compressor and fixed frequency blower fan, to access power frequency supply.
In order to design simple in construction, conversion switch circuit easy to use and switching power circuit, preferably, conversion switch circuit includes: the first catalyst and the second catalyst, first catalyst and the second contactor interlocking, the incoming end of the first catalyst is the first power end, the incoming end of the second catalyst is second source end, the end that picks out of the first catalyst forms load end with picking out after end connects of the second catalyst, control end is conversion switch circuit the second of first catalyst controls end, and control end is conversion switch circuit the first of the second catalyst controls end; Switching power circuit includes single-pole double-throw switch (SPDT) and key switch, and 24v Switching Power Supply is accessed in the moved end of single-pole double-throw switch (SPDT), and the neither moved end of single-pole double-throw switch (SPDT) is connected with the frequency conversion input of team control controller and power frequency input respectively; The control end of key switch connects 24v Switching Power Supply, and second controls end connects 220v working power by the primary path of key switch, and the common electrical source of team control controller is connected with 220v working power. By designing the first catalyst and the second catalyst so that the first invariable frequency compressor, the second invariable frequency compressor and two fixed frequency blower fans obtain protection in frequent opening and closing.
In order to remove the noise in input service power supply so that working power is standard more, it is preferred that be connected to the first wave filter between commutator and working power.
In order to remove the noise in the power supply that input converter exports, make the variable-frequency power sources standard more when the first fixed frequency air compressor and the second fixed frequency air compressor work, more to meet real-time requirement, preferably, in the first frequency changer circuit and the second frequency changer circuit, the second wave filter it is respectively connected with between converter and conversion switch circuit.
Owing to team control controller can produce substantial amounts of heat in working long hours, if heat is excessive there will be the situation that team control controller damages. Therefore to prevent the excessive damage team control controller of heat, it is preferred that be provided with two radiator fans by team control controller, so that team control controller to be dispelled the heat.
In order to coordinate the energy-conservation running of above-mentioned a kind of precision air conditioner energy saver for machine room, the present invention also provides for a kind of energy-saving control method, including:
Step one: mode of operation selects, variable frequency work pattern and power frequency mode of operation is selected by pressing touch switch circuit, with the conversion opening and closing with team control controller cooperating control conversion switch circuit, when selecting variable frequency work pattern, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all access the variable-frequency power sources that converter provides; The power frequency supply that first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency equal Access Control circuit of blower fan provide when selecting power frequency mode of operation, if selecting variable frequency work pattern to carry out step 2, if selecting power frequency mode of operation to carry out step 9;
Step 2: low frequency operation, the first frequency changer circuit, the second frequency changer circuit and the 3rd frequency changer circuit are respectively to the fixed frequency air compressor of first just at work, the second fixed frequency air compressor and two fixed frequency blower fan output 36HZ variable frequency work power supplys;
Step 3: compressor operating state-detection, if having, compressor is in running order carries out step 4, if the in running order return step 2 of compressor-free;
Step 4: real time temperature height is preliminary to be judged, detection is obtained real time temperature and sends control circuit to by temperature sensor, control circuit sends the real time temperature obtained to team control controller, team control controller judges whether real time temperature exceeds setting value, if exceeding setting value, perform step 5, carry out step 6 simultaneously; If not exceeding setting value, return step 3;
Step 5: blower fan 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains fan frequency conversion frequency, and fan frequency conversion frequency sends to the converter of the 3rd frequency changer circuit;
Step 6: real time temperature height judges again, and team control controller judges whether real time temperature exceeds setting value 3 degree, if not exceeding setting value 3 degree, performs step 7; If exceeding setting value 3 degree, perform step 8;
Step 7: compressor 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains compressor variable frequency frequency, and compressor variable frequency frequency is sent to work in the first fixed frequency air compressor or the converter that is connected of the second fixed frequency air compressor;
Step 8: force output 50HZ variable-frequency power sources, the converter output 50HZ variable-frequency power sources being connected with the fixed frequency air compressor of the fixed frequency air compressor of first in work or second forced by team control controller;
Step 9: power frequency works, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all carry out power frequency work under the control of control circuit.
Compared to prior art, there is advantages that
1) by arranging team control controller and converter, achieve the VFC of the first invariable frequency compressor to each air-conditioning, the second invariable frequency compressor and two fixed frequency blower fans, so that its work meets the real-time refrigeration demand in machine room, avoid full speed running when the first invariable frequency compressor, the second invariable frequency compressor and two fixed frequency blower fan work, and starting current also need not be very big, reach energy-conservation purpose;
2) by arranging team control controller and bus, achieve being uniformly controlled of multiple stage air-conditioning in machine room, the work making each air-conditioning is coordinated more, it is to avoid competition operation between each air-conditioning or inverted running in same machine room, has reached energy-conservation purpose;
3) passing through, the commutator input voltage to converter is set and carry out rectification, line voltage 220v exchange is changed into direct current, it is that the variable frequency work of the second converter, the 3rd converter and the 4th converter prepares, and the input voltage of the second converter, the 3rd converter and the 4th converter shares the output voltage of the first converter, decrease the use of rectification circuit so that circuit becomes simpler;
4) by arranging conversion switch circuit and touch switch circuit, achieve user and send access variable-frequency power sources signal to conversion switch circuit and team control controller by pressing touch switch circuit or access power frequency supply signal, conversion switch circuit is made to determine frequency air compressor to first, the power frequency supply that second fixed air compressor frequently or two variable-frequency power sources determining frequency blower fan conversion ground access converter offer and control circuit provide, it is achieved thereby that user is to air-conditioning work pattern (i.e. energy-saving frequency conversion pattern, specified power frequency pattern) selection, make the control work hommization more to air-conditioning.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the VFC module of the precision air conditioner energy saver for machine room;
Fig. 2 is the peripheral circuit diagram of the team control controller of the precision air conditioner energy saver for machine room;
Fig. 3 is the flow chart of energy-saving control method.
Detailed description of the invention
The present invention proposes a kind of precision air conditioner energy saver for machine room, at least two air-conditionings it are provided with in the machine room of place, it is provided with first in every air-conditioning and determines frequency air compressor, the second fixed frequency air compressor, two fixed blower fan, temperature sensor and control circuits frequently, temperature sensor is connected with control circuit, to detect the temperature of each air-conditioning position.
As shown in FIG. 2 and 3, the described precision air conditioner energy saver for machine room includes team control controller PLC, bus (not shown), VFC module and temperature sensor (not shown), team control controller PLC adopts H2U-1616MR model, temperature sensor is connected with the communication ends COM2 of team control controller PLC, to detect real time temperature, the control circuit of air-conditioning is connected each through the detection input of 485 buses with team control controller PLC, and control circuit is provided with host switch branch road, fan switch branch road, first invariable frequency compressor switching branches and the second invariable frequency compressor switching branches, host switch branch road, fan switch branch road, the switch contact of the first invariable frequency compressor switching branches and the second invariable frequency compressor switching branches respectively with the detection input (X3 of team control controller PLC, X4, X5, X6) it is connected, to detect main frame respectively, blower fan, the duty (that is: whether working) of the first invariable frequency compressor and the second invariable frequency compressor, VFC module includes: the commutator VFD1 of cut-in operation power supply (line voltage 220V exchange), the first frequency changer circuit being connected with commutator VFD1, the second frequency changer circuit being connected with commutator VFD1 and the 3rd frequency changer circuit being connected with commutator VFD1, commutator VFD1 adopts MD810-20M model, first frequency changer circuit is for realizing the connection of the first fixed frequency air compressor M1 and commutator VFD1 and control circuit, second frequency changer circuit is for realizing the connection of the second fixed frequency air compressor M2 and commutator VFD1 and control circuit, 3rd frequency changer circuit is for realizing the connection of two fixed frequency blower fan M3 and commutator VFD1 and control circuit.
First frequency changer circuit, second frequency changer circuit and the 3rd frequency changer circuit all include the converter VFD2 being connected with commutator VFD1, conversion switch circuit 1 and switching power circuit 2, converter VFD2 adopts MD810-50M model, conversion switch circuit 1 is provided with the first power end, second source end, first controls end, second controls end and load end, first power end is connected with converter VFD2, second source end is connected with control circuit 3, load end connects the first fixed frequency air compressor M1, second fixed frequency air compressor M2 or two fixed frequency blower fan M3, switching power circuit 2 controls end with the second of conversion switch circuit 1 and is connected, and be connected with the frequency conversion input X1 and power frequency input X2 of team control controller PLC, with to the frequency conversion input X1 of team control controller PLC, power frequency input X2 and the second controls end provides Switching Power Supply. wherein, the control end (1DI1,1DI2,1DI3) of all converter VFD2 is all connected with the outfan (Y10, Y11, Y12) of team control controller PLC, to realize the VFC to the first fixed frequency air compressor M1, the second fixed frequency air compressor M2 and two fixed frequency blower fan M3, the first of conversion switch circuit 1 controls end and is connected with the outfan of team control controller PLC, when the second control end of frequency conversion input X1 and three conversion switch circuits 1 all accesses Switching Power Supply, three converter VFD2 are connected by three conversion switch circuits 1 respectively with the first fixed frequency air compressor M1, the second fixed frequency air compressor M2 and fixed frequency blower fan M3, to access variable-frequency power sources, when power frequency input X2 accesses Switching Power Supply, control circuit 3 and the first fixed frequency air compressor M1, the second fixed frequency air compressor M2 and fixed frequency blower fan M3 are connected by three conversion switch circuits 1, to access power frequency supply.
Conversion switch circuit 1 includes: the first catalyst (KM1, KM3, KM5) and the second catalyst KM2, first catalyst (KM1, KM3, KM5) with the second catalyst KM2 interlocking, first catalyst (KM1, KM3, KM5) incoming end is the first power end, the incoming end of the second catalyst KM2 is second source end, first catalyst (KM1, KM3, KM5) the end that picks out forms load end with picking out after end connects of the second catalyst KM2, first catalyst (KM1, KM3, KM5) control end is conversion switch circuit 1 second controls end, second catalyst KM2 controls the first control end that end is conversion switch circuit 1, switching power circuit 2 includes the moved end of single-pole double-throw switch (SPDT) SA1 and key switch KA1, single-pole double-throw switch (SPDT) SA1 and accesses 24v Switching Power Supply, and the neither moved end of single-pole double-throw switch (SPDT) SA1 is connected with the frequency conversion input of team control controller PLC and power frequency input respectively, the control end of key switch KA1 connects 24v Switching Power Supply, the second of conversion switch circuit 1 controls end and connects 220v working power by the primary path of key switch KA, common electrical source C0 and the 220v working power of team control controller PLC is connected, thinking that the outfan (Y0, Y2, Y4) of team control controller PLC provides out-put supply, the first of three conversion switch circuits 1 controls end and is connected with three outfans (Y0, Y2, Y4) of team control controller PLC respectively.
The first wave filter EMI it is connected between commutator VFD1 and working power.
First frequency changer circuit and the second frequency changer circuit are respectively connected with between converter VFD2 and conversion switch circuit 1 second wave filter LC.
As it is shown on figure 3, for the energy-conservation running coordinating above-mentioned a kind of precision air conditioner energy saver for machine room, the present invention also provides for a kind of energy-saving control method, including:
Step one s1: mode of operation selects, variable frequency work pattern and power frequency mode of operation is selected by pressing touch switch circuit, with the conversion opening and closing with team control controller cooperating control conversion switch circuit, when selecting variable frequency work pattern, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all access the variable-frequency power sources that converter provides; The power frequency supply that first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency equal Access Control circuit of blower fan provide when selecting power frequency mode of operation, if selecting variable frequency work pattern to carry out step 2 s2, if selecting power frequency mode of operation to carry out step 9 s9;
Step 2 s2: low frequency operation, the first frequency changer circuit, the second frequency changer circuit and the 3rd frequency changer circuit are respectively to the fixed frequency air compressor of first just at work, the second fixed frequency air compressor and two fixed frequency blower fan output 36HZ variable frequency work power supplys;
Step 3 s3: compressor operating state-detection, if having, compressor is in running order carries out step 4 s4, if the in running order return step 2 s2 of compressor-free;
Step 4 s4: real time temperature height is preliminary to be judged, detection is obtained real time temperature and sends control circuit to by temperature sensor, control circuit sends the real time temperature obtained to team control controller, team control controller judges whether real time temperature exceeds setting value, if exceeding setting value, perform step 5 s5, carry out step 6 s6 simultaneously; If not exceeding setting value, return step 3 s3;
Step 5 s5: blower fan 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains fan frequency conversion frequency, and fan frequency conversion frequency sends to the converter of the 3rd frequency changer circuit;
Step 6 s6: real time temperature height judges again, and team control controller judges whether real time temperature exceeds setting value 3 degree, if not exceeding setting value 3 degree, performs step 7 s7; If exceeding setting value 3 degree, perform step 8 s8;
Step 7 s7: compressor 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains compressor variable frequency frequency, and compressor variable frequency frequency is sent to work in the first fixed frequency air compressor or the converter that is connected of the second fixed frequency air compressor;
Step 8 s8: force output 50HZ variable-frequency power sources, the converter output 50HZ variable-frequency power sources being connected with the fixed frequency air compressor of the fixed frequency air compressor of first in work or second forced by team control controller;
Step 9 s9: power frequency works, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all carry out power frequency work under the control of control circuit.
The operation principle of the present embodiment: during use, first carries out step one s1, presses single-pole double-throw switch (SPDT) SA1, selects to connect energy-conservation input X1 or power frequency input X2 realizing user.
When user selects to connect energy-conservation input X1 (namely: select energy saver mode), , depresses button switch KA1 again, the control of key switch KA1 terminates into 24v Switching Power Supply, key switch KA1 closes, first frequency changer circuit, first catalyst (the KM1 of the conversion switch circuit 1 of the second frequency changer circuit and the 3rd frequency changer circuit, KM3, KM5) control end (that is: second controls end) input is 220V working power (that is: connecting live wire L11), outfan (the Y0 of team control controller PLC, Y2, Y4) to the second catalyst (KM2, KM4, KM6) control end output 0V, therefore the first catalyst (KM1, KM3, KM5) (namely: the variable-frequency power sources being connected with converter is connected) is connected, second catalyst (KM2, KM4, KM6) (namely: the power frequency supply being connected with control circuit disconnects) is disconnected, energy saver mode starts. under the duty of energy saver mode, carrying out step 2 s2: low frequency operation, the first frequency changer circuit, the second frequency changer circuit and the 3rd frequency changer circuit export 36HZ variable frequency work power supply to the fixed frequency air compressor M1 of first just at work, the second fixed frequency air compressor M2 and two fixed frequency blower fan M3 respectively, then step 3 s3 is carried out: compressor operating state-detection, step 4 s4: real time temperature height is preliminary to be judged, detection is obtained real time temperature and sends control circuit 3 to by temperature sensor, the real time temperature obtained is sent to team control controller PLC by control circuit 3, team control controller PLC judges whether real time temperature exceeds setting value, if exceeding setting value, performing step 5 s5, carrying out step 6 s6 simultaneously, if not exceeding setting value, return step 3 s3, step 5 s5: blower fan 35HZ-50HZ frequency conversion, team control controller PLC carry out PID arithmetic according to the difference of real time temperature Yu design temperature and obtain fan frequency conversion frequency, and fan frequency conversion frequency sends to the converter of the 3rd frequency changer circuit, step 6 s6: real time temperature height judges again, and team control controller PLC judges whether real time temperature exceeds setting value 3 degree, if not exceeding setting value 3 degree, performs step 7 s7, if exceeding setting value 3 degree, perform step 8 s8, step 7 s7: compressor 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains compressor variable frequency frequency, and compressor variable frequency frequency is sent to work in the first fixed frequency air compressor or the converter that is connected of the second fixed frequency air compressor, step 8 s8: force output 50HZ variable-frequency power sources, the converter output 50HZ variable-frequency power sources being connected with the fixed frequency air compressor of the fixed frequency air compressor of first in work or second forced by team control controller, thus realizing the first invariable frequency compressor and the second invariable frequency compressor at variable frequency work MODE of operation, thus finally achieving the VFC to fixed frequency air conditioner, meet modern energy saving requirement.
When selecting power frequency mode of operation (that is: performing step 9 s9) by SA1, team control controller PLC closes to the first frequency changer circuit, the converter output of the second frequency changer circuit and the 3rd frequency changer circuit, disconnect key switch KA1, first catalyst (KM1, KM3, KM5) control end input is 0V, first catalyst (KM1, KM3, KM5) disconnect, team control controller PLC is to the second catalyst (KM2, KM4, KM6) control end input 220v working power, first catalyst (KM1, KM3, KM5) disconnect, second catalyst (KM2, KM4, KM6) Guan Bi, therefore, first fixed frequency air compressor M1, the power frequency supply that second fixed frequency air compressor M2 and two fixed frequency equal Access Control circuit of blower fan M3 provide, first fixed frequency air compressor M1, second fixed frequency air compressor M2 and two fixed frequency blower fan M3 is in power frequency duty.
What finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from objective and the scope of technical solution of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (6)
1. the precision air conditioner energy saver for machine room, it is characterized in that, including: team control controller, bus, VFC module and temperature sensor, temperature sensor is connected with the communication ends of team control controller, and the control circuit of air-conditioning is connected with the detection input of team control controller by bus;
VFC module includes: the commutator of cut-in operation power supply, the first frequency changer circuit being connected with commutator, the second frequency changer circuit being connected with commutator and the 3rd frequency changer circuit being connected with commutator, first frequency changer circuit is for realizing the connection of the first fixed frequency air compressor and commutator and control circuit, second frequency changer circuit is for realizing the connection of the second fixed frequency air compressor and commutator and control circuit, 3rd frequency changer circuit is for realizing the connection of two fixed frequency blower fans and commutator and control circuit, first frequency changer circuit, second frequency changer circuit and the 3rd frequency changer circuit all include the converter being connected with commutator, conversion switch circuit and switching power circuit, conversion switch circuit is provided with the first power end, second source end, first controls end, second controls end and load end, first power end is connected with converter, second source end is connected with control circuit, load end connects the first fixed frequency air compressor, second fixed frequency air compressor or two fixed frequency blower fans, switching power circuit controls end with the second of conversion switch circuit and is connected, and be connected with frequency conversion input and the power frequency input of team control controller, with to the frequency conversion input of team control controller, power frequency input and second controls end provides Switching Power Supply,
Wherein, the control end of all converters is all connected with team control controller, to realize the VFC to the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans; The first of conversion switch circuit controls end and is connected with the outfan of team control controller, when the second control end of frequency conversion input and three conversion switch circuits all accesses Switching Power Supply, three converters are connected by three conversion switch circuits respectively with the first fixed frequency air compressor, the second fixed frequency air compressor and fixed frequency blower fan, to access variable-frequency power sources; When power frequency input accesses Switching Power Supply, control circuit is connected by three conversion switch circuits with the first fixed frequency air compressor, the second fixed frequency air compressor and fixed frequency blower fan, to access power frequency supply.
2. the precision air conditioner energy saver for machine room according to claim 1, it is characterised in that
Conversion switch circuit includes: the first catalyst and the second catalyst, first catalyst and the second contactor interlocking, the incoming end of the first catalyst is the first power end, the incoming end of the second catalyst is second source end, the end that picks out of the first catalyst forms load end with picking out after end connects of the second catalyst, control end is conversion switch circuit the second of first catalyst controls end, and control end is conversion switch circuit the first of the second catalyst controls end;
Switching power circuit includes single-pole double-throw switch (SPDT) and key switch, and 24v Switching Power Supply is accessed in the moved end of single-pole double-throw switch (SPDT), and the neither moved end of single-pole double-throw switch (SPDT) is connected with the frequency conversion input of team control controller and power frequency input respectively; The control end of key switch connects 24v Switching Power Supply, second controls end connects 220v working power by the primary path of key switch, the common electrical source of team control controller is connected with 220v working power, and the first of three conversion switch circuits controls end and be connected with three outfans of team control controller respectively.
3. the precision air conditioner energy saver for machine room according to claim 1, it is characterised in that be connected to the first wave filter between commutator and working power.
4. the precision air conditioner energy saver for machine room according to claim 1, it is characterised in that be respectively connected with the second wave filter between converter and conversion switch circuit in the first frequency changer circuit and the second frequency changer circuit.
5. the precision air conditioner energy saver for machine room according to claim 1, it is characterised in that be provided with two radiator fans by team control controller, so that team control controller to be dispelled the heat.
6. the energy-saving control method according to claim 1 to 5 any one, it is characterised in that including:
Step one: mode of operation selects, variable frequency work pattern and power frequency mode of operation is selected by pressing touch switch circuit, with the conversion opening and closing with team control controller cooperating control conversion switch circuit, when selecting variable frequency work pattern, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all access the variable-frequency power sources that converter provides; The power frequency supply that first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency equal Access Control circuit of blower fan provide when selecting power frequency mode of operation, if selecting variable frequency work pattern to carry out step 2, if selecting power frequency mode of operation to carry out step 9;
Step 2: low frequency operation, the first frequency changer circuit, the second frequency changer circuit and the 3rd frequency changer circuit are respectively to the fixed frequency air compressor of first just at work, the second fixed frequency air compressor and two fixed frequency blower fan output 36HZ variable frequency work power supplys;
Step 3: compressor operating state-detection, if having, compressor is in running order carries out step 4, if the in running order return step 2 of compressor-free;
Step 4: real time temperature height is preliminary to be judged, detection is obtained real time temperature and sends control circuit to by temperature sensor, control circuit sends the real time temperature obtained to team control controller, team control controller judges whether real time temperature exceeds setting value, if exceeding setting value, perform step 5, carry out step 6 simultaneously; If not exceeding setting value, return step 3;
Step 5: blower fan 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains fan frequency conversion frequency, and fan frequency conversion frequency sends to the converter of the 3rd frequency changer circuit;
Step 6: real time temperature height judges again, and team control controller judges whether real time temperature exceeds setting value 3 degree, if not exceeding setting value 3 degree, performs step 7; If exceeding setting value 3 degree, perform step 8;
Step 7: compressor 35HZ-50HZ frequency conversion, team control controller carries out PID arithmetic according to the difference of real time temperature Yu design temperature and obtains compressor variable frequency frequency, and compressor variable frequency frequency is sent to work in the first fixed frequency air compressor or the converter that is connected of the second fixed frequency air compressor;
Step 8: force output 50HZ variable-frequency power sources, the converter output 50HZ variable-frequency power sources being connected with the fixed frequency air compressor of the fixed frequency air compressor of first in work or second forced by team control controller;
Step 9: power frequency works, the first fixed frequency air compressor, the second fixed frequency air compressor and two fixed frequency blower fans all carry out power frequency work under the control of control circuit.
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| CN105674517B (en) | 2018-07-10 |
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