CN105402856B - A kind of evaporation type cool-down ventilation machine intelligent variable frequency control system - Google Patents
A kind of evaporation type cool-down ventilation machine intelligent variable frequency control system Download PDFInfo
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- CN105402856B CN105402856B CN201510924534.8A CN201510924534A CN105402856B CN 105402856 B CN105402856 B CN 105402856B CN 201510924534 A CN201510924534 A CN 201510924534A CN 105402856 B CN105402856 B CN 105402856B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 20
- 238000001704 evaporation Methods 0.000 title claims abstract description 19
- 230000008020 evaporation Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 239000013598 vector Substances 0.000 description 21
- 230000006870 function Effects 0.000 description 14
- 230000000875 corresponding effect Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/59—Remote control for presetting
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- Engineering & Computer Science (AREA)
- 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)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system, including guidance panel, mainboard and motor, the guidance panel and motor are connected with mainboard, the mainboard includes CPU control units, high-power integrated control module, relay group, water level detection circuit, second communication module, motor current detecting circuit and power supply processing module, the high-power integrated control module, relay group, water level detection circuit, motor current detecting circuit and the second communication module are connected with CPU control units, the high-power integrated control module and motor connection, the control algolithm that the present invention passes through SVPWM more more advanced than SPWM, the harmonic components of inverter output current and the harmonic loss of motor can be reduced, reduce pulsating torque and noise, improve electric efficiency, improve power utilization rate, and complicated diversified menu operation and parameter setting can be realized.
Description
【Technical field】
The present invention relates to the technical field of evaporation type cool-down ventilation machine, particularly a kind of evaporation type cool-down ventilation machine intelligently becomes
The technical field of frequency control system.
【Background technology】
Existing evaporation type cool-down ventilation machine control system is generally divided into single speed type and speed governing type, applies respectively not
Same occasion.It is using the advantage of speed governing, one is to meet actual demand, continuing high-speed cruising may cause temperature too low, allow
People is difficult to bear.Two when being the operation of blower fan low speed, more economizing on energy and electricity.Three be noise requirements, when user's sleep, or is needed quiet
, it is necessary to reduce fan speed to realize during sound.
Threephase asynchronous machine is generally used on evaporation type cool-down ventilation machine, to realize that speed is adjusted to this motor, currently
The method of the unique mature and feasible of industry, is variable-frequency control technique, by changing to motor terminal voltage frequency, carrys out proportional low change
Motor speed.Actually while frequency is changed, the amplitude to voltage also changes simultaneously, and referred to as V/F regulations, common name becomes frequency modulation
Fast technology.
Variable-frequency control technique has been widely used for electric machine speed regulation field, wherein, be related to the algorithm core of VFC-
Three-phase output voltage is modulated, realizes that many common converter plants pass through simple SPWM by PWM waveform modulation
Algorithm realizes that it is exported using SPWM three-phases for simulating civil power, is the angle based on power supply.It is using having the disadvantage：Inverter
The harmonic components of output current and the harmonic loss of motor are big, improve pulsating torque and noise, electric efficiency is low, and its electricity
Source utilization rate is low.
Frequency control function is most crucial function in evaporation type cool-down ventilation machine master control borad, but is changed as evaporated cooling
In itself, in addition to speed governing, also many other functions need to realize in the lump mechanism of qi.The evaporated cooling ventilation that in the market is used
In machine control system, the panel used uses one piece of LCD, mostly segment code type display screen, although elegant in appearance, but due to this
The pattern die sinking of display screen is made, it is impossible to complicated diversified menu operation and parameter setting are realized, so that shadow
The realization and extension of its function are rung.
【The content of the invention】
The purpose of the present invention is exactly to solve the problems of the prior art, proposes a kind of evaporation type cool-down ventilation machine intelligent frequency-conversion
Control system, by SVPWM more more advanced than SPWM control algolithm, can reduce the harmonic components of inverter output current
And the harmonic loss of motor, reduction pulsating torque and noise, electric efficiency is improved, power utilization rate is improved, and designs and adopts
With the guidance panel of two pieces of display screens, complicated diversified menu operation and parameter setting can be realized.
To achieve the above object, the present invention proposes a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system, including
Guidance panel, mainboard and motor, the guidance panel and motor are connected with mainboard, and the guidance panel includes the first monolithic
Machine, the first communication module, segment code type LCD display, lattice type LCD display screen, infrared remote control receive head, Temperature Humidity Sensor and
Key-press input group, first communication module, segment code type LCD display, lattice type LCD display screen, infrared remote control receive head, temperature
Humidity sensor and key-press input group are connected with the first single-chip microcomputer, and the mainboard includes CPU control units, high-power integrated control
Molding block, relay group, water level detection circuit, the second communication module, motor current detecting circuit and power supply processing module, it is described
High-power integrated control module, relay group, water level detection circuit, motor current detecting circuit and the second communication module with
CPU control units are connected, and the high-power integrated control module is connected with motor and motor current detecting circuit respectively, and described the
One communication module is connected by connection with the second communication module, the relay in the relay group respectively with water pump, water inlet
Valve, wind pendulum driver and draining valve connect one to one, and the power supply processing module module includes high-voltage rectifying part and low pressure
Voltage stabilization part, the high-voltage rectifying part and low pressure voltage stabilization part in high-power integrated control module and circuit respectively with respectively controlling
Module be connected, the high-power integrated control module include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6,
Resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16,
Resistance R17, resistance R18, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity
C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, electric capacity C16, electric capacity C17, electric capacity C18, electricity
Hold C19, electric capacity C20, diode D1, diode D2, diode D3, diode D4, diode D5, diode D6 and IPM module,
One end of the resistance R1 and electric capacity C1 are connected with cathode power supply E1, the other end ground connection of the electric capacity C1, the resistance R1
The other end be connected with diode D1 anode, the negative electrode of diode D1 positive pole respectively with electric capacity C2, the one of electric capacity C3
The pin 19 of end and IPM modules is connected, and the negative pole of the electric capacity C2 and the electric capacity C3 other end and the pin 20 of IPM modules connect
Connect, one end of the resistance R3 is connected with the pin 20 of IPM modules, the other end of the resistance R3 draws with IPM modules respectively
The W ends connection of pin 26 and motor, one end of the resistance R4 and electric capacity C5 is connected with cathode power supply E1, and the electric capacity C5's is another
One end is grounded, and the other end of the resistance R4 is connected with diode D2 anode, the negative electrode of the diode D2 respectively with electric capacity
The pin 15 of C6 positive pole, electric capacity C7 one end and IPM modules is connected, the negative pole of the electric capacity C6 and the electric capacity C7 other end with
The pin 16 of IPM modules is connected, and one end of the resistance R6 is connected with the pin 16 of IPM modules, the other end of the resistance R6
It is connected respectively with the pin 25 of IPM modules and the V ends of motor, one end of the resistance R7 and electric capacity C9 connect with cathode power supply E1
Connect, the other end ground connection of the electric capacity C9, the other end of the resistance R7 is connected with diode D3 anode, the diode D2
Negative electrode positive pole respectively with electric capacity C10, the pin 11 of electric capacity C11 one end and IPM modules be connected, the electric capacity C10's is negative
Pole and electric capacity the C11 other end are connected with the pin 12 of IPM modules, and one end of the resistance R10 connects with the pin 12 of IPM modules
Connect, the other end of the resistance R10 is connected with the pin 24 of IPM modules and the U ends of motor respectively, the CPU control units
Pin 1 is connected with resistance R2 one end, the other end of resistance R2 one end respectively with electric capacity C4 and the pin 17 of IPM modules
Connection, the other end ground connection of the electric capacity C4, the pin 2 of the CPU control units is connected with resistance R5 one end, the resistance
The R5 other end is connected with electric capacity C8 one end and the pin 13 of IPM modules respectively, the other end ground connection of the electric capacity C8, described
The pin 3 of CPU control units is connected with resistance R8 one end, the other end of the resistance R8 respectively with electric capacity C12 one end and
The pin 9 of IPM modules is connected, the other end ground connection of the electric capacity C12, the pin 4 and resistance R16's of the CPU control units
One end is connected, and the other end of the resistance R16 is connected with electric capacity C18 one end and the pin 5 of IPM modules respectively, the electric capacity
C18 other end ground connection, the pin 5 of the CPU control units is connected with resistance R17 one end, the other end of the resistance R17
It is connected respectively with electric capacity C17 one end and the pin 4 of IPM modules, the other end ground connection of the electric capacity C17, the CPU controls are single
The pin 6 of member is connected with resistance R18 one end, the other end of resistance R18 one end respectively with electric capacity C16 and IPM modules
Pin 3 connect, the other end of electric capacity C16 ground connection is parallel with electric capacity between the pin 2 and pin 1 of the IPM modules
C19 and electric capacity C20, the electric capacity C20 positive pole are connected with the pin 1 and cathode power supply E1 of IPM modules respectively, the IPM moulds
The pin 2 of block is grounded, and the pin 23 of the IPM modules is connected with resistance R9 one end and diode D4 anode respectively, described
Resistance R9 other end ground connection, the negative electrode of the diode D4 is connected with resistance R11 one end and Current amplifier loop respectively, institute
Current amplifier loop is stated to be connected with the pin 8 of CPU control units, the other end of the resistance R11 respectively with resistance R12 and resistance
R14 one end connection, the other end of the resistance R12 is connected with electric capacity C14 one end and the pin 8 of IPM modules respectively, described
The resistance R14 other end and the electric capacity C14 other end, electric capacity C13 one end, electric capacity C15 one end are connected and are grounded, the electricity
The other end for holding C13 is connected with the pin 7 of IPM modules, the other end of the electric capacity C15 respectively with the pins 6 of IPM modules and
The pin 7 of CPU control units is connected, the pins 22 of IPM modules one end respectively with resistance R13 and diode D5 anode
Connection, the other end ground connection of the resistance R13, the negative electrode of diode D5 one end respectively with resistance R11 and Current amplifier
Loop is connected, and the pin 21 of the IPM modules is connected with resistance R15 one end and diode D6 anode respectively, the resistance
R15 other end ground connection, the negative electrode of the diode D6 is connected with resistance R11 one end and Current amplifier loop respectively, described
The pin 10,14 and 18 of IPM modules is connected with cathode power supply E1, the connection of pin 27 300V of IPM modules positive pole electricity
Source.
Preferably, also including RTC real-time clocks, the RTC real-time clocks are connected with the first single-chip microcomputer.
Preferably, the lattice type LCD display screen is integrated dot matrix 12864LCD display screens.
Preferably, also including buzzer, the buzzer is connected with the first single-chip microcomputer.
Preferably, the key-press input group includes on/off key, cleaning button, deceleration button, mode key, acceleration
Button, wind put button, reach button, button are moved afterwards, button is exited and enters button.
Preferably, also including LED light, the LED light is connected with the first single-chip microcomputer, the LED light
Including water shortage indicator lamp and malfunction indicator lamp.
Beneficial effects of the present invention：Inverter output can be obviously reduced by SVPWM technology application in the mainboard of the present invention
The harmonic components of electric current and the harmonic loss of motor, reduction pulsating torque and noise, improve electric efficiency, and its power utilization
Rate, about 15% is improved than SPWM.In the design of guidance panel, by segment code type LCD display and lattice type LCD display screen simultaneously
Using, and both area ratio size and function distinguishing are rightly designed, elegant in appearance, price has been taken into account well
Cost, can realize complicated diversified menu operation and parameter setting.
The feature and advantage of the present invention will be described in detail by embodiment combination accompanying drawing.
【Brief description of the drawings】
Fig. 1 is a kind of block diagram of evaporation type cool-down ventilation machine intelligent variable frequency control system of the invention；
Fig. 2 is the block diagram of guidance panel；
Fig. 3 is the outside drawing of guidance panel；
Fig. 4 is the circuit diagram of high-power integrated control module；
Fig. 5 is the on off state figure of inverter；
Fig. 6 is space vector of voltage figure；
Fig. 7 is in response processing subprogram each time, by the program flow diagram of execution；
Fig. 8 is that lattice type LCD display screen menu enters the surface chart that super timing function is set；
Fig. 9 is the surface chart that lattice type LCD display screen menu enters speed governing submenu；
Figure 10 is the surface chart that lattice type LCD display screen menu enters humid control submenu；
Figure 11 is the fault message exemplary plot that lattice type LCD display screen is shown.
In figure：1- guidance panels, 2- mainboards, 3- motors, the single-chip microcomputers of 11- first, the communication modules of 12- first, 13- segment code types
LCD display, 14- lattice type LCDs display screen, 15-RTC real-time clocks, 16- infrared remote controls receive head, 17- temperature and humidity sensings
The high-power integrated control mould of device, 18- key-press inputs group, 19- buzzers, 110-LED indicator lamps, 21-CPU control units, 22-
Block, 23- relay groups, 24- water level detection circuits, the communication modules of 25- second, 26- water intaking valves, 27- wind pendulum driver, 28- rows
Water valve, 29- motor current detecting circuits, 210- water pumps, 211- power supply processing modules, 222-IPM modules.
【Embodiment】
Refering to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system of the invention, including
Guidance panel 1, mainboard 2 and motor 3, the guidance panel 1 and motor 3 are connected with mainboard 2, and the guidance panel 1 includes the
One single-chip microcomputer 11, the first communication module 12, segment code type LCD display 13, lattice type LCD display screen 14, infrared remote control receive head
16th, Temperature Humidity Sensor 17 and key-press input group 18, first communication module 12, segment code type LCD display 13, dot matrix
LCD display 14, infrared remote control receive first 16, Temperature Humidity Sensor 17 and key-press input group 18 connects with the first single-chip microcomputer 11
Connect, the mainboard 2 include CPU control units 21, high-power integrated control module 22, relay group 23, water level detection circuit 24,
Second communication module 25, motor current detecting circuit 29 and power supply processing module 211, the high-power integrated control module 22,
Relay group 23, water level detection circuit 24, the communication module 25 of motor current detecting circuit 29 and second with CPU control units 21
Connection, the high-power integrated control module 22 is connected with motor 3 and motor current detecting circuit 29 respectively, first communication
Module 12 is connected by connection with the second communication module 25, the relay in the relay group 23 respectively with water pump 210, enter
Water valve 26, wind pendulum driver 27 and draining valve 28 connect one to one, and the module of power supply processing module 211 includes high-voltage rectifying
Part and low pressure voltage stabilization part, the high-voltage rectifying part and low pressure voltage stabilization part respectively with high-power integrated control module 22 and
In circuit each control module be connected, the high-power integrated control module 22 include resistance R1, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, electricity
Hinder R15, resistance R16, resistance R17, resistance R18, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity
C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, electric capacity C16, electric capacity
C17, electric capacity C18, electric capacity C19, electric capacity C20, diode D1, diode D2, diode D3, diode D4, diode D5, two poles
Pipe D6 and IPM module 222, one end of the resistance R1 and electric capacity C1 is connected with cathode power supply E1, and the electric capacity C1's is another
End ground connection, the other end of the resistance R1 is connected with diode D1 anode, the negative electrode of the diode D1 respectively with electric capacity C2
Positive pole, the pin 19 of electric capacity C3 one end and IPM modules 222 connect, the negative pole of the electric capacity C2 and the electric capacity C3 other end
It is connected with the pin 20 of IPM modules 222, one end of the resistance R3 is connected with the pin 20 of IPM modules 222, the resistance R3
The other end be connected respectively with the pin 26 of IPM modules 222 and the W ends of motor 6, one end of the resistance R4 and electric capacity C5 with
Cathode power supply E1 connections, the other end ground connection of the electric capacity C5, the other end of the resistance R4 is connected with diode D2 anode,
The pin 15 of the negative electrode of diode D2 positive pole respectively with electric capacity C6, electric capacity C7 one end and IPM modules 222 is connected, institute
State electric capacity C6 negative pole and the electric capacity C7 other end is connected with the pin 16 of IPM modules 222, one end of the resistance R6 and IPM
The pin 16 of module 222 is connected, and the other end of the resistance R6 connects with the pin 25 of IPM modules 222 and the V ends of motor 6 respectively
Connect, one end of the resistance R7 and electric capacity C9 are connected with cathode power supply E1, the other end ground connection of the electric capacity C9, the resistance
The R7 other end is connected with diode D3 anode, positive pole, the electric capacity C11 of the negative electrode of the diode D2 respectively with electric capacity C10
One end and the pins 11 of IPM modules 222 connect, the negative pole of the electric capacity C10 and the electric capacity C11 other end and IPM modules 222
Pin 12 connect, one end of the resistance R10 is connected with the pin 12 of IPM modules 222, the other end of the resistance R10 point
It is not connected with the pin 24 of IPM modules 222 and the U ends of motor 6, the pin 1 of the CPU control units 21 and resistance R2 one end
Connection, the other end of the resistance R2 is connected with electric capacity C4 one end and the pin 17 of IPM modules 222 respectively, the electric capacity C4
Other end ground connection, the pin 2 of the CPU control units 21 is connected with resistance R5 one end, and the other end of the resistance R5 divides
It is not connected with electric capacity C8 one end and the pin 13 of IPM modules 222, the other end ground connection of the electric capacity C8, the CPU controls are single
The pin 3 of member 21 is connected with resistance R8 one end, the other end of resistance R8 one end respectively with electric capacity C12 and IPM modules
222 pin 9 is connected, the other end ground connection of the electric capacity C12, the pin 4 of the CPU control units 21 and the one of resistance R16
End connection, the other end of the resistance R16 is connected with electric capacity C18 one end and the pin 5 of IPM modules 222 respectively, the electric capacity
C18 other end ground connection, the pin 5 of the CPU control units 21 is connected with resistance R17 one end, and the resistance R17's is another
End is connected with electric capacity C17 one end and the pin 4 of IPM modules 222 respectively, the other end ground connection of the electric capacity C17, the CPU
The pin 6 of control unit 21 is connected with resistance R18 one end, the other end of the resistance R18 respectively with electric capacity C16 one end and
The pin 3 of IPM modules 222 is connected, the other end of electric capacity C16 ground connection, the pin 2 and pin 1 of the IPM modules 222 it
Between be parallel with the pin 1 and cathode power supply E1 of electric capacity C19 and electric capacity C20, the electric capacity C20 positive pole respectively with IPM modules 222
Connection, the pin 2 of the IPM modules 222 is grounded, the one end and two poles of the pins 23 of the IPM modules 222 respectively with resistance R9
Pipe D4 anode connection, the other end ground connection of the resistance R9, the negative electrode of the diode D4 respectively with resistance R11 one end and
Current amplifier loop is connected, and the Current amplifier loop is connected with the pin 8 of CPU control units 21, and the resistance R11's is another
Hold one end respectively with resistance R12 and resistance R14 to be connected, the other end of the resistance R12 respectively with electric capacity C14 one end and
The pin 8 of IPM modules 222 is connected, the other end of the resistance R14 and the electric capacity C14 other end, electric capacity C13 one end, electric capacity
C15 one end is connected and is grounded, and the other end of the electric capacity C13 is connected with the pin 7 of IPM modules 222, the electric capacity C15's
The other end is connected with the pin 6 of IPM modules 222 and the pin 7 of CPU control units 21 respectively, the pin of the IPM modules 222
22 are connected with resistance R13 one end and diode D5 anode respectively, the other end ground connection of the resistance R13, the diode
D5 negative electrode is connected with resistance R11 one end and Current amplifier loop respectively, the pins 21 of the IPM modules 222 respectively with electricity
Hinder R15 one end and diode D6 anode connection, the other end ground connection of the resistance R15, the negative electrode point of the diode D6
It is not connected with resistance R11 one end and Current amplifier loop, the pin 10,14 and 18 of the IPM modules 222 is and cathode power supply
E1 connections, the pin 27 of the IPM modules 222 connects 300V cathode power supply, in addition to RTC real-time clocks 15, and the RTC is real
Shi Shizhong 15 is connected with the first single-chip microcomputer 11, and the lattice type LCD display screen 14 is integrated dot matrix 12864LCD display screens, also
Including buzzer 19, the buzzer 19 is connected with the first single-chip microcomputer 11, and the key-press input group 8 includes on/off key, cleaning
Button, deceleration button, mode key, turbo, wind pendulum button, reach button, afterwards move button, exit button and enter by
Key, in addition to LED light 110, the LED light 110 are connected with the first single-chip microcomputer 11, and the LED light 110 includes
Water shortage indicator lamp and malfunction indicator lamp.
The course of work of the present invention：
A kind of evaporation type cool-down ventilation machine intelligent variable frequency control system of the present invention is in the course of the work：
Control algolithm part：
Threephase asynchronous rotating speed formula is：N=60f (1-s)/p changes frequency of supply f, motor from the formula
Number of pole-pairs p and revolutional slip s can reach change rotating speed purpose.That wherein most widely used is regulating frequency f, but if
Only changing frequency can make motor for overvoltage (overexcitation), cause motor to be burnt without changing voltage, frequency when reducing
It is bad, therefore frequency converter is had to while frequency is changed while change voltage, referred to as v/f controls.In actual applications, generally
According to motor parameter and application scenario needs, the corresponding curves of a v/f are predefined, and when needing speed governing, according to speed
Degree instruction is required, draws control respective frequencies f, then according to v/f curves, draws the voltage magnitude v for needing to export, and this is electric
V is pressed, then is that realization is modulated by following SVPWM algorithms.
SVPWM technical principle is：First, inside IPM modules 222, its structure is to include 6 IGBT devices, and phase
The driving circuit of pass, under the driving for the 6 road signals that CPU control units 21 are exported, this 6 devices will appear from 8 kinds of on off states
Combination, exports different voltages, is added on three static coils in motor, produces the blended space magnetic changed with voltage
, in order to allow the continual and steady circular rotating of motor, this resultant magnetic field is also rotationally-varying, in order to study the space in magnetic field
Change, Switch State Combination in Power Systems different in above 8, can regard 6 kinds of nonzero voltage space vectors and 2 kinds of zero vectors as.With average
It is worth the principle of equal effects, by selecting wherein 2 kinds, and null vector in 6 kinds of basic voltage vectors within a SVPWM cycle, with line
Property combination, its average eguivalent value and some time is set a date and hope that the voltage vector value Uref of modulation is equal.CPU control units 21 will
In each SVPWM controlling cycles, according to the accumulated change amount of the motor anglec of rotation, two kinds of non-zeros are recalculated each
Corresponding action time, and zero vector action time, will modulation time parameter feeding SVPWM wave producers, output waveform letter
Number high-power integrated control module 22 is given, further general principles supplement is as follows：
1st, the on off state of inverter
Inside the high-power integrated control module 22 of drive and control of electric machine, it is made up of 6 IGBT power devices, such as
Fig. 5, wherein above three, be commonly referred to as upper arm, below three be underarm, any time, the upper arm and underarm of same column can not possibly be same
When turn on, module is burnt in otherwise short circuit, can only be only one conducting, or both be not turned on.Specific adopted switch function Sx (x
=a, b, c) it is：
The possible switch combination of whole of (Sa, Sb, Sc) has eight, including 6 non-zero Ul (001), U2
(010), U3 (011), U4 (100), U5 (101), U6 (110) and two zero vector U0 (000), U7 (111), wherein 2 null vectors
Amount, such as U0 represents that 3 upper arm switches are shut-off, three underarms are conducting, it that case, as Fig. 5 can be seen
Go out, three coil terminals of motor are connected with power cathode, and circuit does not form loop, actual acting effect is not produced, but
The final stage modulated in follow-up actual waveform, has crucial indispensable effect.
2nd, the spatiality of switching vector selector
By the effective switching vector selector of above-mentioned 6 kinds of non-zeros, represented with Fig. 6, the mould length of every kind of vector is equal, two neighboring vector folder
60 degree of angle, forms a regular hexagon.Wherein, 6 adjacent intervals, also known as different sectors, each 60 degree of sector angular.
3rd, the linear combination of vector
Assuming that in action time in T controlling cycle, Uref is expects voltage vector, and Tx, Ty, T0 are respectively correspondence two
Individual nonzero voltage space vector Ux, Uy and Zero voltage vector U0, the action time in three's each comfortable sampling period；Then between them
There is following corresponding relation：
Uref* T=Ux*Tx+Uy*Ty+U0*T0
4th, obtain in Linear Combination of Vectors, the action time of resolute
Different at the time of, under corresponding angle, θ, Uref vectors are in different " sectors " described in above-mentioned 2 points
In, action time Tx, Ty, T0 of resolute may finally be extrapolated according to triangle sine and cosine relation.Due in different sectors
Corresponding angle sine and cosine value is different, therefore, and correspondence to different Tx, Ty, T0 calculations occurs.
In actual applications, the computational methods of angle, θ are, within each SVPWM interrupt cycle, according to current operation
Frequency f, calculates angular speed, draws angle step, calculates and differentiates to accumulate, and different θ prefabricated in CPU are corresponding just in advance
String and cosine value table, to simplify related operation.Voltage vector angular velocity of rotation is the π f of ω=2, and the time needed for rotating a circle is T
=1/f；If the frequency of SVPWM waveforms is fs, frequency ratio is R=T/Ts=fs/f.So voltage Plane of rotation etc. is cut
Into R little increment, that is, the angle of the setting each increment of voltage vector is：
γ=2 π/R=2 π f/fs=2 π Ts/T
5 program circuit explanations
In actual control program, the general SVPWM waveform generators inside CPU control units 21 will be with 10,000 times per second
Frequency, automatically generate interrupt processing response, in response processing subprogram each time, following program flow will be performed
Journey such as Fig. 7.
Mainboard drive part：
CPU control units 21 are high-performance processor DSP, produce 6 tunnels independence, and complementary and with dead area compensation up and down
SVPWM signals, have benefited from the advance of internal control circuit in IPM modules 222, and air conditioner power of motor generally only has
Below 1.5KW, therefore 6 isolation optocouplers are eliminated between CPU control units 21 and IPM modules 222, both are joined directly together,
Drive circuit is simplified, while the circuit structure detected to current of electric is also significantly simplified, so as to simplify cost.
As shown in figure 4, using 3 low resistance sampling resistors, R9, R13, R15, sample motor three-phase current draw one
After the voltage signal Isen of small magnitude, the pin of IPM modules 222 the 8th is entered by R12 and C14 all the way, the inside of IPM modules 222 collects
Into the monitoring circuit for having precision, after Isen exceedes certain amplitude, a fiduciary level signal will be exported with the 6th pin, represented
The over current of motor signal Fault detection mouth special to CPU control units 21, CPU control units 21 will terminate SVPWM immediately
The waveform output of device, so as to protect IPM modules 222 in time with prestissimo, plays a part of overcurrent protection.
In addition to overcurrent protection mechanism, in addition, Isen signals are also by Current amplifier loop, into CPU control units 21
AD sample ports, to detect motor current value in real time, this current value will also be transferred to operation by the second communication module 25
Panel 1, and guidance panel 1 in addition to it can show current value in real time, moreover it is possible to protection value parameter is configured, when current of electric is held
When continuing more than some value, reduction rotating speed will be taken or stop the measures such as motor, so as to play protection motor, the work of overload is prevented
With.
Guidance panel function：
As air conditioner control system, in addition to realizing and carrying out variable frequency regulating speed control to motor, powerful work(is also equipped with
It can control, mainly be realized by guidance panel.
Guidance panel is shown by the first single-chip microcomputer 11, segment code type LCD display 13, one piece of integrated dot matrix 12864LCD
Screen, RTC real-time clocks 15, infrared remote control receives first 16, buzzer 19, Temperature Humidity Sensor 17, the grade of key-press input group 18 composition.
Wherein, segment code type LCD display 13 mainly shows groundwork state, and attractive in appearance, intuitively, and dot matrix 12864LCD then realizes dish
Listization is operated, and to realize complexity, various functional parameter is set, or record queries.
One of the characteristics of two display screens are also the control system, segment code type LCD display 13 and lattice type LCD display screen
14 respectively have length, both small one and large one collocation, are to form complementation well.
Main functional modules have：
Basic function part：Directly by accelerator key and deceleration key, the control and display to blower fan wind speed are realized.In addition,
It may also display the water position status detected from mainboard and current values.Also air conditioner pattern and pump inlet valve etc. in real time shape
State, also failure code.
The function of menuization operation：
By carrying out programming and the button operation of menu to lattice type LCD 12864, many of air conditioner control can be achieved
Parameter setting, and record check, function addition.Wherein, following functions can be covered at least.
1st, due to equipped with real-time clock RTC block on guidance panel, then can be operated by menu, realization is often preordained
When switching on and shutting down, or even Setting pattern, wind speed etc. realizes the control become more meticulous, meanwhile, also can easily calibrate the setting time.
As shown in figure 8, be the interface when menu of lattice type LCD display screen 14 enters automatic temperature-controlled speed governing submenu, wherein.
1/8 is represented, and most 8 clocking disciplines are prefixed in system, can be individually configured per rule, be included whether to enable, and
Specific set of time, in addition to the action of execution are start or the setting of shutdown, operational mode, and wind speed.By multigroup fixed
When rule setting, can allow air conditioner control system realize automation, the standard of Unmanned operation.
2nd, equipped with humiture module, the operation curve of temperature and wind speed can be set, automatic speed regulating function is realized, when in daytime
When noon temperature is high, blower fan automatic running is in higher gear, during to evening or low temperature, and prompt drop of keeping watch automatically is low.And it is automatic
The parameter of speed governing, is necessarily required to carry out settable operation according to different site environments and customer demand.In order to simplify operation, lead to
Often only need to set minimum wind-speed gear, and highest wind velocity gear, corresponding temperature value, then, be in two temperature values it
Between temperature, corresponding wind speed, it is possible to allow program to calculate automatically.
As shown in figure 9, being the interface when menu of lattice type LCD display screen 14 enters speed governing submenu, wherein " ON " " 25 " "
38 " three positions can shade show, the parameter that modification is set can be achieved.In addition to automatic speed regulation, this function can be also set to
OFF, then system will be returned to the state of manual governing.
System also detects humidity in real time except detection temperature, and when humidity is higher than certain value, system will stop water pump operation,
Water pump will be restarted again when humidity falls back to certain value, this is done to suitably humid control in certain scope, both
Avoid humidity too high for a long time, also in humidity step-down, water pump can be restarted in time, refrigeration is realized.
As shown in Figure 10, be the menu of lattice type LCD display screen 14 enter humid control submenu interface.
3rd, it is provided with the control parameter of powered-down machine
For different types, application scenario, it may be necessary to set different control parameters, such as motor overload protection value,
The correlation such as motor maximum running frequency is set, and can be completed by menu operation.
4th, detailed record look facility
When machine failure, or machine time need to safeguard afterwards for a long time, there is provided important record for convenience
Information is as foundation, and panel MCU is by built-in EEPROM memory blocks, by fault message, including failure code, also together with RTC
The date and time of realization, while being recorded in entry form.
As shown in figure 11, the fault message example that as lattice type LCD display screen 14 is shown.In addition, also can record system
Run time, number of run, and all multi informations such as version.
Above-described embodiment is the description of the invention, is not limitation of the invention, it is any to simple transformation of the present invention after
Scheme belong to protection scope of the present invention.
Claims (6)
1. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system, it is characterised in that：Including guidance panel (1), mainboard (2)
With motor (3), the guidance panel (1) and motor (3) are connected with mainboard (2), and the guidance panel (1) includes the first monolithic
Machine (11), the first communication module (12), segment code type LCD display (13), lattice type LCD display screen (14), infrared remote control are received
Head (16), Temperature Humidity Sensor (17) and key-press input group (18), first communication module (12), segment code type LCD display
(13), lattice type LCD display screen (14), infrared remote control receive head (16), Temperature Humidity Sensor (17) and key-press input group (18)
Be connected with the first single-chip microcomputer (11), the mainboard (2) include CPU control units (21), high-power integrated control module (22),
Relay group (23), water level detection circuit (24), the second communication module (25), motor current detecting circuit (29) and power supply processing
Module (211), the high-power integrated control module (22), relay group (23), water level detection circuit (24), current of electric inspection
Slowdown monitoring circuit (29) and the second communication module (25) are connected with CPU control units (21), the high-power integrated control module
(22) be connected respectively with motor (3) and motor current detecting circuit (29), first communication module (12) by connection with
Second communication module (25) is connected, the relay in the relay group (23) respectively with water pump (210), water intaking valve (26), wind
Pendulum driver (27) and draining valve (28) connect one to one, and power supply processing module (211) module includes high-voltage rectifying portion
Point and low pressure voltage stabilization part, the high-voltage rectifying part and low pressure voltage stabilization part respectively with high-power integrated control module (22) and
Each control module is connected in circuit, and the high-power integrated control module (22) includes resistance R1, resistance R2, resistance R3, resistance
R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance
R14, resistance R15, resistance R16, resistance R17, resistance R18, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity
C6, electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13, electric capacity C14, electric capacity C15, electric capacity
C16, electric capacity C17, electric capacity C18, electric capacity C19, electric capacity C20, diode D1, diode D2, diode D3, diode D4, two poles
Pipe D5, diode D6 and IPM module (222), one end of the resistance R1 and electric capacity C1 are connected with cathode power supply E1, described
Electric capacity C1 other end ground connection, the other end of the resistance R1 is connected with diode D1 anode, the negative electrode of the diode D1
The pin 19 of positive pole respectively with electric capacity C2, electric capacity C3 one end and IPM modules (222) is connected, the negative pole of the electric capacity C2 and
The electric capacity C3 other end is connected with the pin 20 of IPM modules (222), one end of the resistance R3 and the pin of IPM modules (222)
20 connections, the W ends of the other end of the resistance R3 respectively with the pin 26 and motor (3) of IPM modules 222 are connected, the resistance
R4 and electric capacity C5 one end are connected with cathode power supply E1, the other end ground connection of the electric capacity C5, the other end of the resistance R4
It is connected with diode D2 anode, positive pole, electric capacity C7 one end and the IPM moulds of the negative electrode of the diode D2 respectively with electric capacity C6
The pin 15 of block (222) is connected, and the negative pole of the electric capacity C6 and the electric capacity C7 other end and the pin 16 of IPM modules (222) connect
Connect, one end of the resistance R6 is connected with the pin 16 of IPM modules (222), the other end of the resistance R6 respectively with IPM modules
(222) the V ends connection of pin 25 and motor (3), one end of the resistance R7 and electric capacity C9 is connected with cathode power supply E1, institute
Electric capacity C9 other end ground connection is stated, the other end of the resistance R7 is connected with diode D3 anode, the moon of the diode D2
The pin 11 of pole positive pole respectively with electric capacity C10, electric capacity C11 one end and IPM modules (222) is connected, and the electric capacity C10's is negative
Pole and electric capacity the C11 other end are connected with the pin 12 of IPM modules (222), one end and the IPM modules (222) of the resistance R10
Pin 12 connect, the other end of the resistance R10 is connected with the pin 24 of IPM modules (222) and the U ends of motor (3) respectively,
The pin 1 of the CPU control units (21) is connected with resistance R2 one end, and the other end of the resistance R2 is respectively with electric capacity C4's
The pin 17 of one end and IPM modules (222) is connected, the other end of electric capacity C4 ground connection, and CPU control units (21) draw
Pin 2 is connected with resistance R5 one end, the other end of the resistance R5 respectively with electric capacity C8 one end and drawing for IPM modules (222)
Pin 13 is connected, and the other end ground connection of the electric capacity C8, the pin 3 of the CPU control units (21) is connected with resistance R8 one end,
The other end of the resistance R8 is connected with electric capacity C12 one end and the pin 9 of IPM modules (222) respectively, the electric capacity C12's
The other end is grounded, and the pin 4 of the CPU control units (21) is connected with resistance R16 one end, the other end of the resistance R16
It is connected respectively with electric capacity C18 one end and the pin 5 of IPM modules (222), the other end ground connection of the electric capacity C18, the CPU
The pin 5 of control unit (21) is connected with resistance R17 one end, the one end of the other end of the resistance R17 respectively with electric capacity C17
Connected with the pin 4 of IPM modules (222), the other end ground connection of the electric capacity C17, the pin 6 of the CPU control units (21)
Be connected with resistance R18 one end, the other end of the resistance R18 respectively with electric capacity C16 one end and drawing for IPM modules (222)
Pin 3 is connected, the other end ground connection of the electric capacity C16, and electric capacity is parallel between the pin 2 and pin 1 of the IPM modules (222)
C19 and electric capacity C20, the electric capacity C20 positive pole are connected with the pin 1 and cathode power supply E1 of IPM modules (222) respectively, described
The pin 2 of IPM modules (222) is grounded, the pins 23 of the IPM modules (222) one end respectively with resistance R9 and diode D4
Anode connection, the other end ground connection of the resistance R9, the negative electrode of diode D4 one end respectively with resistance R11 and electric current
Amplifying return circuit is connected, and the Current amplifier loop is connected with the pin 8 of CPU control units (21), the other end of the resistance R11
One end with resistance R12 and resistance R14 is connected respectively, the other end of resistance R12 one end respectively with electric capacity C14 and IPM
The pin 8 of module (222) is connected, the other end of the resistance R14 and the electric capacity C14 other end, electric capacity C13 one end, electric capacity
C15 one end is connected and is grounded, and the other end of the electric capacity C13 is connected with the pin 7 of IPM modules (222), the electric capacity C15
The other end be connected respectively with the pin 6 of IPM modules (222) and the pin 7 of CPU control units (21), the IPM modules
(222) pin 22 is connected with resistance R13 one end and diode D5 anode respectively, the other end ground connection of the resistance R13,
The negative electrode of the diode D5 is connected with resistance R11 one end and Current amplifier loop respectively, and IPM modules (222) draw
Pin 21 is connected with resistance R15 one end and diode D6 anode respectively, the other end ground connection of the resistance R15, two pole
Pipe D6 negative electrode is connected with resistance R11 one end and Current amplifier loop respectively, pin 10,14 and of the IPM modules (222)
18 are connected with cathode power supply E1, and the pin 27 of the IPM modules (222) connects 300V cathode power supply.
2. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system as claimed in claim 1, it is characterised in that：Also wrap
RTC real-time clocks (15) are included, the RTC real-time clocks (15) are connected with the first single-chip microcomputer (11).
3. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system as claimed in claim 1, it is characterised in that：The point
Configuration LCD display (14) is integrated dot matrix 12864LCD display screens.
4. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system as claimed in claim 1, it is characterised in that：Also include
Buzzer (19), the buzzer (19) is connected with the first single-chip microcomputer (11).
5. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system as claimed in claim 1, it is characterised in that：It is described to press
Key input group (18) includes on/off key, cleaning button, deceleration button, mode key, turbo, wind and puts button, reach and press
Key, afterwards move button, exit button and enter button.
6. a kind of evaporation type cool-down ventilation machine intelligent variable frequency control system as any one of claim 1 to 5, its feature
It is：Also include LED light (110), the LED light (110) is connected with the first single-chip microcomputer (11), the LED is indicated
Lamp (110) includes water shortage indicator lamp and malfunction indicator lamp.
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| CN1300517C (en) * | 2004-10-11 | 2007-02-14 | 宁波华液机器制造有限公司 | Energy saving control system of frequency conversion in use for central air condition |
| US8032254B2 (en) * | 2007-11-30 | 2011-10-04 | Honeywell International Inc. | Method and apparatus for configuring an HVAC controller |
| JP2010243060A (en) * | 2009-04-06 | 2010-10-28 | Tan Hui | Air conditioning equipment and its host computer |
| CN201531974U (en) * | 2009-05-20 | 2010-07-21 | 林国达 | Industrial environment-friendly air-conditioning control system |
| CN204717970U (en) * | 2015-06-04 | 2015-10-21 | 河北为信电子科技有限公司 | ventilation controller |
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Effective date of registration: 20180418 Address after: 311800 No. 31, Chung Tao Road, Tao Zhu street, Zhuji, Shaoxing, Zhejiang. Patentee after: Zhuji Xingyang mechanical and electrical equipment Limited by Share Ltd Address before: 311800 Feng Mu 117, Fung Xing Village, Tao Zhu street, Zhuji, Shaoxing, Zhejiang Co-patentee before: Xiao Yurong Patentee before: Zhang Xinjiang |