CN104960399B - A kind of electric air-conditioning control system - Google Patents
A kind of electric air-conditioning control system Download PDFInfo
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- CN104960399B CN104960399B CN201510408815.8A CN201510408815A CN104960399B CN 104960399 B CN104960399 B CN 104960399B CN 201510408815 A CN201510408815 A CN 201510408815A CN 104960399 B CN104960399 B CN 104960399B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
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- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of electric air-conditioning control system, the system includes controller, power module, evaporator temperature sensor, inner-outer circulation pattern actuator, compressor, temperature actuator, pattern actuator, air blower；Wherein power module prevents electrostatic using two filter capacitors being disposed vertically, and avoids two electric capacity while damage.Fast recovery diode forward direction is connected between DC power anode and voltage-stablizer input, can prevent that power supply is reversed, protects controller.Transient Suppression Diode Opposite direction connection prevents controller from being damaged because of the pulse of moment between the input of voltage-stablizer and power supply ground.In two filter circuits, high-frequency signal is filtered out using the electrochemical capacitor of big capacitance, the electrochemical capacitor of big capacitance is protected with the ceramic condenser of low-capacitance, can prevent it from generating heat in high frequency.The present invention can work under highly stable supply voltage, good reliability.
Description
Technical field
The present invention relates to a kind of electric air-conditioning control system, and in particular to a kind of a air-conditioning on small passenger car
Control system, the system have the advantages that simple to operate, automaticity height, highly reliable.
Background technology
With the development of auto industry and microelectric technique, automobile has been enter into thousand ten thousand as a kind of easily vehicles
Family, the application of air conditioning for automobiles are more and more extensive.And people are for in-car environment also more and more higher of riding.Modern big minibus is all
It is required that there is comfortable environment inside car, vehicle interior temperature is mainly controlled.And air conditioner load becomes with in-car external environment, temperature change
Change, when automobile engine makees air conditioning power, also to be changed by speed is influenceed.Therefore, the control to air conditioning for automobiles is special
Significant, and it is highly important.
Traditional automotive air-conditioning system includes controller, power module, evaporator temperature control sensor, and compressor is inside and outside to follow
Ring mode actuator, air blower, pattern actuator, temperature actuator, defrost actuator afterwards, background light switch circuit etc.；This is
System is controlled by controller output signal to inner-outer circulation pattern, rear defrosting, compressor.Wherein power module is using common
Dc source, operating voltage is unstable, and poor reliability.Held for air blower, pattern actuator (pattern motor) and temperature
Row device (changes in temperature motor), all it is that manually rotary switch is operated, by mechanical structure to wind speed of blast blower, pattern electricity
The rotation of machine, the rotation of changes in temperature motor carry out gear adjustment, and it is low that manual mode operation has a reliability, complex manufacturing,
Uniformity and comfortableness are poor, and control is inaccurate, the problems such as control lag.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of stable operating voltage, the electric air-conditioning control system of good reliability
System.
In order to solve the above-mentioned technical problem, electric air-conditioning control system of the invention includes controller, power module, evaporation
Device temperature sensor, inner-outer circulation pattern actuator, compressor, temperature actuator, pattern actuator, air blower；The power supply
Module is powered for whole control system, and evaporator temperature sensor is connected with controller；Controller by driving chip with it is inside and outside
Circulation pattern actuator, compressor, temperature actuator, the connection of pattern actuator, it is connected by chopper speed control module with air blower；
It is characterized in that the power module includes two filter capacitors being disposed vertically on circuit boards, fast recovery diode, transient state
Suppress diode, low-capacitance ceramic condenser, big capacitance electrochemical capacitor, voltage-stablizer, ceramic filter capacitor, be electrolysed filter capacitor；Institute
State fast recovery diode forward direction to be connected between the positive pole of dc source and the input of voltage-stablizer, the output termination control of voltage-stablizer
Device processed；Two filter capacitors are connected between dc source BAT positive pole and power supply ground；Transient Suppression Diode Opposite direction connection in
Between the input and ground of voltage-stablizer；Low-capacitance ceramic condenser and the big capacitance electrochemical capacitor filter circuit in parallel formed are connected to
Between the input and power supply ground of voltage-stablizer, the filter circuit of ceramic filter capacitor composition in parallel with electrolysis filter capacitor is connected to
Between the output end and power supply ground of voltage-stablizer.
Power module prevents electrostatic using two filter capacitors being disposed vertically, and can prevent stress, avoid two electric capacity
Damage simultaneously.Fast recovery diode forward direction is connected between DC power anode and voltage-stablizer input, can prevent power supply from connecing
Instead, controller is protected, will not be also burned in the case where dc source is reversed.Transient Suppression Diode Opposite direction connection is in voltage stabilizing
Between the input and power supply ground of device, it can prevent controller from being damaged because of the pulse of moment.In two filter circuits, using big
The electrochemical capacitor of capacitance filters out high-frequency signal, protects the electrochemical capacitor of big capacitance with the ceramic condenser of low-capacitance, can prevent it
Generate heat in high frequency.Voltage-stablizer uses a DCDC voltage conversion chip, and unstable input voltage can be converted into stabilization
Output voltage.Whole power module provides highly stable output voltage for controller and each actuator.The present invention can be
Worked under highly stable supply voltage, good reliability.
The voltage-stablizer LDO uses a programmable small-power DCDC circuit, and the circuit includes input filtering electric capacity,
Inductance, DCDC voltage stabilizing chips, diode, the feedback circuit being made up of feedback resistance and programmable resistance, feedback circuit filtered electrical
Hold, output end filter capacitor；Inductance and diode are serially connected between input and the output end of whole voltage-stablizer, diode forward
It is connected between inductance and output end of voltage stabilizer；Filter capacitor is connected between voltage-stablizer input and power supply ground；Whole voltage stabilizing
The output end of device is connected to feedback resistance, the other end of feedback resistance by wire parallel with one another and feedback circuit filter capacitor
By programmable feedback resistor with connecing power supply；The voltage input end Vin of DCDC voltage stabilizing chips is connected to the input of voltage-stablizer, opens
OFF signal input SW is connected to the positive pole of diode, feedback signal input terminal be connected to feedback resistance and programmable resistance it
Between；Output end filter capacitor is connected between output end of voltage stabilizer and power supply ground.
The programmable resistance uses programmable resistance AD5245, and output electricity is accurately controlled by changing its resistance
Pressure.
Further, present invention additionally comprises temperature to adjust signal acquisition circuit；Temperature adjusts signal acquisition circuit and controller
Connection, signal is adjusted for collecting temperature；Temperature adjustment signal acquisition circuit includes tie point divider resistance, and tie point is defeated
Go out resistance, tie point filter capacitor, the second branch road divider resistance, the second branch road output resistance, the second branch road filter capacitor, by
The temperature adjustment potentiometer resistance of multiple resistant series compositions；Between tie point divider resistance and temperature adjustment potentiometer resistance
Current potential controller is connected by tie point output resistance, tie point filter capacitor is connected to controller input and power supply
Between ground；Current potential between second branch road divider resistance and temperature adjustment potentiometer resistance is connected by the second branch road output resistance
Controller, the second branch road filter capacitor are connected between controller input and power supply ground.
Temperature adjustment signal acquisition circuit has two voltage outputs, when the gold finger copper foil of external temperature adjustment knob exists
When different stalls input slides, the difference between two voltages of temperature adjustment signal acquisition circuit output changes, and controls
Device processed exports different control signal actuation temperature actuators according to the voltage difference and worked, to adjust air-conditioning work temperature.Temperature
The smooth change during control, greatly improves capacity usage ratio, has reached the purpose of energy-conservation, has put forward high-comfort, fortune
Turn steady.Particularly temperature adjustment signal acquisition circuit in temperature adjustment potentiometer resistance be connected to two partial pressure branch resistances it
Between, when the gold finger copper foil of external temperature adjustment knob slides in different stalls input, the voltage of controller collection is all the way
Reduce, another way increase, the difference of input voltage between two gears is improved, so as to further increase temperature control precision.
Present invention additionally comprises motor power supply current foldback circuit；Motor power supply current foldback circuit includes by first,
Second overcurrent protection triode, first resistor, second resistance composition current foldback circuit, fuse, by switching tube and the 3rd,
The on-off circuit of four, the 5th resistance composition, the voltage feedback circuit being made up of the six, the seven, the 8th resistance, exports filtered electrical
Hold；First, second overcurrent protection triode is PNP type triode, and switching tube is NPN type triode；The output of power module is led to
The emitter stage that first resistor connects the second overcurrent protection triode is crossed, the colelctor electrode of the second overcurrent protection triode passes through fuse
Each actuator in control system is connected, is powered by first resistor, the second overcurrent protection triode for each actuator；First mistake
Stream protection triode, its base stage connect the emitter stage of the second overcurrent protection triode, and emitter stage connects the output of power module, colelctor electrode
Connect the base stage of the second overcurrent protection triode；Second resistance be connected across the emitter stage of the first overcurrent protection triode and colelctor electrode it
Between；The base stage of second overcurrent protection triode is grounded by the 5th resistance and switching tube；The base stage of switching tube passes through 3rd resistor
Controller output is connect, the 4th resistance is connected between the base stage of switching tube and ground；Six, the 8th resistance are serially connected in motor and powered
Between the output and the ground that flow protection circuit, the current potential between the six, the 8th resistance connects the input of controller by the 7th resistance；It is defeated
Go out filter capacitor to be connected between output and the ground of motor power supply current foldback circuit.
By first resistor, second resistance, the first overcurrent protection triode, the second excessively stream in motor power supply current foldback circuit
Protect triode to form current foldback circuit, when motor shorted to earth, overcurrent protection can be played.Fuse has been also
To the effect of overcurrent protection, its reaction speed is faster than triode, when immediate current is very big, will fuse, to whole electric current
Play a protective role.Controller is monitored, if defeated by the 7th electrical resistance collection feedback voltage to exporting to the voltage of actuator
Go out voltage it is larger when, illustrate circuit normal work；When output voltage very little, illustrate short circuit, controller output low level
Controlling switch pipe is closed, and every opening switching tube again for a period of time, then voltage is monitored, until output voltage is normal.Improve
The stability of system.
Present invention additionally comprises air quantity Regulate signal Acquisition Circuit；The air quantity Regulate signal Acquisition Circuit is adjusted including air quantity
Divider resistance and adjust potentiometer resistances, air quantity regulation output end resistance and filtered electrical by multiple electric groups air quantity being composed in series
Hold；The current potential that air quantity is adjusted between divider resistance and air quantity regulation potentiometer resistance adjusts the connection of output end resistance by air quantity and controlled
Device processed；Filter capacitor is connected between controller input and power supply ground.
There is gear signal input between each resistance in air quantity regulation potentiometer resistance, when the gold of outside air quantity knob
For finger copper foil when different stalls input slides, the voltage of air quantity Regulate signal Acquisition Circuit output is different, controller according to
The pwm signal of the voltage output different duty, to adjust the size of discharge quantity of fan, improve the Boiler pressure control essence of air-conditioning system
Degree and service efficiency.
Present invention additionally comprises mode adjustment signal acquisition circuit；The mode adjustment signal acquisition circuit includes mode adjustment
Divider resistance, mode adjustment potentiometer resistance, mode adjustment output end resistance and filter capacitor；Mode adjustment divider resistance and mould
Current potential between formula adjustment potentiometer resistance connects controller by mode adjustment output end resistance；Filter capacitor is connected to control
Between device input and power supply ground.
There is gear signal input between each resistance in mode adjustment potentiometer resistance, when the gold of external schema knob
For finger copper foil when different stalls input slides, the voltage of mode adjustment signal acquisition circuit output is different, controller according to
The voltage output difference control signal, make pattern actuator be operated in respectively blow face, blow face blow pin, blow pin, blow pin defrosting, defrosting
Pattern；There is gear signal input between each resistance in temperature adjustment potentiometer resistance.Mode adjustment signal acquisition circuit
The position signalling of the outside control handle of collection is simultaneously converted into voltage signal so that controller can be according to the signal electricity of input
Pressure exports different control signals, with adjustment modes actuator mode of operation, improves the control accuracy of air-conditioning system and using effect
Rate.
The chopper speed control module includes first order amplifier, second level amplifier, filter network, feedback circuit；It is described
First order amplifier and second level amplifier form PI controllers, and filter network includes two resistance and filtering；Feedback circuit bag
Include the feedback resistance being serially connected and feedback capacity；The pwm signal output end of controller is put by filter network and the second level
The normal phase input end connection of big device, the output end of second level amplifier are connected to the first order by feedback resistance and feedback capacity and put
The output of the normal phase input end, power module of big device and air blower, the inverting input of first order amplifier are connected to air blower
Feedback signal output, the output of first order amplifier is connected to the inverting input of second level amplifier.
Controller export different duty pwm control signal, the pwm control signal by chopper speed control module export to
Air blower, PI controls are carried out to air blower, to adjust the size of discharge quantity of fan.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the electric air-conditioning Control system architecture block diagram of the present invention；
Fig. 2 is air quantity Regulate signal Acquisition Circuit figure；
Fig. 3 is mode adjustment signal acquisition circuit figure；
Fig. 4 is temperature adjustment signal acquisition circuit figure；
Fig. 5 is power module circuitry figure；
Fig. 6 is voltage-stablizer LDO circuit figure；
Fig. 7 is motor power supply current foldback circuit；
Fig. 8 is pulse debugging module circuit diagram.
Embodiment
As shown in figure 1, the electric air-conditioning control system of the present invention includes controller, power module, evaporator temperature sensing
Device, inner-outer circulation pattern actuator, compressor, temperature actuator, pattern actuator, air blower；Characterized by further comprising wind
Measure Regulate signal Acquisition Circuit, mode adjustment signal acquisition circuit, temperature adjustment signal acquisition circuit, motor power supply overcurrent protection
Circuit；The power module is powered for whole control system；Evaporator temperature sensor, air quantity Regulate signal Acquisition Circuit, mould
Formula adjusts signal acquisition circuit and temperature adjustment signal acquisition circuit is connected with controller, for gathering evaporator temperature, air quantity
Regulate signal, mode adjustment signal and temperature adjustment signal；Controller passes through driving chip and inner-outer circulation pattern actuator, pressure
Contracting machine, temperature actuator, the connection of pattern actuator, it is connected by chopper speed control module with air blower；Power module and controller
Connection, and held by motor power supply current foldback circuit with inner-outer circulation pattern actuator, compressor, temperature actuator, pattern
Row device, air blower connection.Wherein evaporator temperature control sensor temperature acquisition, compressor control, and inner-outer circulation Schema control
It is prior art, is described again here.
As shown in Fig. 2 the air quantity Regulate signal Acquisition Circuit includes air quantity regulation divider resistance R46, air quantity regulation point
Press rheostat, air quantity regulation output end resistance R47 and filter capacitor C41；Air quantity adjust potentiometer resistance by resistance R41, R42,
R43, R44, R45 are composed in series；The current potential that air quantity is adjusted between divider resistance R46 and air quantity regulation potentiometer resistance passes through air quantity
Adjust output end resistance R47 connection controllers.
There is gear signal input between each resistance in air quantity regulation potentiometer resistance, when the gold of outside air quantity knob
For finger copper foil when different stalls input slides, divider resistance is different, the electricity for causing air quantity Regulate signal Acquisition Circuit to export
Pressure is different, and controller controls air blower to make it according to the pwm signal of the voltage output different duty by chopper speed control module
Adjust the size of discharge quantity of fan.
As shown in figure 3, the mode adjustment signal acquisition circuit includes mode adjustment divider resistance R51, mode adjustment point
Press rheostat, mode adjustment output end resistance R52 and filter capacitor C51；Mode adjustment potentiometer resistance by resistance R53, R54,
R55, R56 are composed in series；Current potential between mode adjustment divider resistance R51 and mode adjustment potentiometer resistance passes through mode adjustment
Output end resistance R52 connection controllers.
There is gear signal input between each resistance in mode adjustment potentiometer resistance, when the gold of external schema knob
For finger copper foil when different stalls input slides, divider resistance is different, the electricity for causing mode adjustment signal acquisition circuit to export
Pressure is different, and controller makes it distinguish work according to the voltage output difference control signal by driving chip drive pattern actuator
Make blow face, blow face blow pin, blow pin, blow pin defrosting, defrosting mode.
As shown in figure 4, temperature adjustment signal acquisition circuit includes tie point divider resistance R61, tie point output electricity
Hinder the branch road divider resistance of R62, tie point filter capacitor C61, second R64, the second branch road output resistance R63, the filter of the second branch road
Ripple electric capacity C62, temperature adjustment potentiometer resistance；Temperature adjustment potentiometer resistance by n resistance R601, R602,
R603 ... R60n are composed in series；Current potential between tie point divider resistance R61 and temperature adjustment potentiometer resistance passes through the
One branch road output resistance R62 connection controllers；Current potential between second branch road divider resistance R64 and temperature adjustment potentiometer resistance
Pass through the second branch road output resistance R63 connection controllers.
There is gear signal input between each resistance in temperature adjustment potentiometer resistance.Temperature adjustment signal acquisition electricity
Road has two voltage outputs, and controller is driven according to the difference output control signal between two voltages by driving chip
Dynamic temperature actuator works.When the gold finger copper foil of external temperature adjustment knob slides in different stalls input, temperature is adjusted
Difference between two voltages of entire signal Acquisition Circuit output changes, and controller exports different controls according to the voltage difference
Signal actuation temperature actuator work processed, to adjust air-conditioning work temperature.
As shown in figure 5, power module includes two the filter capacitor C11 and C12 being disposed vertically on circuit boards, it is fast to recover
Diode D11, Transient Suppression Diode D12, low-capacitance ceramic condenser C13, big capacitance electrochemical capacitor C14, voltage-stablizer LDO, pottery
Porcelain filter capacitor C15, electrolysis filter capacitor C16；The fast recovery diode D11 forward directions are connected to dc source BAT positive pole
Between voltage-stablizer LDO input, voltage-stablizer LDO output termination controller；Filter capacitor C11 and C12 are connected on direct current
Between power supply BAT positive pole and power supply ground；Transient Suppression Diode D12 Opposite direction connections are in voltage-stablizer LDO input and ground
Between；The low-capacitance ceramic condenser C13 and big capacitance electrochemical capacitor C14 filter circuits in parallel formed are connected to the defeated of voltage-stablizer LDO
Enter between end and power supply ground, the filter circuit of ceramic filter capacitor C15 compositions in parallel with electrolysis filter capacitor C16 is connected to voltage stabilizing
Between device LDO output end and power supply ground.
12V~24V voltages of external dc power BAT inputs, by two filter capacitor being disposed vertically C11 and C12,
Play a part of preventing electrostatic, two filter capacitors C11 and C12 vertically put, can prevent stress, avoid two on circuit boards
Individual electric capacity damages simultaneously.Fast recovery diode D11 forward directions are connected between dc source BAT positive poles and voltage-stablizer LDO inputs,
It can prevent that power supply is reversed, protect controller, will not be also burned in the case where dc source BAT is reversed.Transient state suppresses two
Pole pipe D12 Opposite direction connections are between voltage-stablizer LDO input and power supply ground, when instantaneous voltage exceedes circuit normal working voltage
Afterwards, Transient Suppression Diode D12 just produces snowslide, there is provided gives transient current one super-low resistance path, the result is that instantaneous electricity
Stream is drawn away by diode, and makes to be always maintained at blanking voltage by protective loop before voltage recovers normal value.Work as wink
When end-of-pulsing after, Transient Suppression Diode D12 automatically replies high-impedance state, and whole loop enters normal voltage, so as to anti-
Only controller is because of the pulse damage of moment.The low-capacitance ceramic condenser C13 and big capacitance electrochemical capacitor C14 filtered electricals in parallel formed
Lu Zhong, big capacitance electrochemical capacitor C14 effect is to filter out high-frequency signal, and low-capacitance ceramic condenser C13 is used to protect big capacitance electricity
Electric capacity C14 is solved, prevents it from generating heat in high frequency.Voltage-stablizer LDO uses a DCDC voltage conversion chip, and its major function is to carry
For voltage stabilizing, i.e., unstable input voltage can be converted into stable output voltage, output voltage is not with input voltage or defeated
Go out the change of electric current and change.In the filter circuit that ceramic filter capacitor C15 is formed with electrolysis filter capacitor C16, electrolysis filter
Ripple electric capacity C16 effect is to filter out high-frequency signal, ceramic filter capacitor C15 be used for protect electrolysis filter capacitor C16, prevent its
Generated heat under high frequency.Whole power module provides highly stable output voltage for controller and each actuator.
As shown in fig. 6, the LDC circuits use a programmable small-power DCDC circuit, the circuit includes input
Filter capacitor C21, inductance L21, DCDC voltage stabilizing chip, diode D21, is made up of feedback resistance R21 and programmable resistance R22
Feedback circuit, feedback circuit filter capacitor C23, output end filter capacitor C22；Inductance L21 and diode D21 are serially connected in entirely
Between the input and output end of LDC circuits, diode D21 forward directions are connected between inductance L21 and LDC output end；Filtered electrical
Hold C21 to be connected between LDC inputs and power supply ground；The output end of whole LDC circuits passes through wire parallel with one another and feedback electricity
Road filter capacitor C23 is connected to feedback resistance R21, and the feedback resistance R21 other end connects power supply by programmable feedback resistor R22
Ground；The voltage input end Vin of DCDC voltage stabilizing chips is connected to the input of LDC circuits, and switch signal input end SW is connected to two
Pole pipe L21 positive pole, feedback signal input terminal are connected between feedback resistance R21 and programmable resistance R22；Output end filtered electrical
Hold C22 to be connected between LDC output ends and power supply ground.
Voltage-stablizer LDO input voltage vin filters by electric capacity C21, then after DCDC voltage stabilizing chips, obtain one it is defeated
Go out voltage, DCDC voltage stabilizing chips are fed back to by feedback resistance R21 and programmable feedback resistor R22, so as to reach control output
Voltage Vout purpose.
The programmable resistance R22 uses programmable resistance AD5245, and output is accurately controlled by changing its resistance
Voltage.
As shown in fig. 7, motor power supply current foldback circuit include by first, second overcurrent protection triode Q31,
Q32, first resistor R31, the current foldback circuit of second resistance R32 compositions, fuse F31, by switching tube Q33 and the 3rd, the
4th, the on-off circuit of the 5th resistance R33, R34, R35 compositions, the electricity being made up of the six, the seven, the 8th resistance R36, R37, R38
Press feedback circuit, output filter capacitor C37；First, second overcurrent protection triode Q31, Q32 is PNP type triode, switch
Q33 is NPN type triode；The transmitting that the output of LDC circuits passes through first resistor R31 connection the second overcurrent protection triodes Q32
Pole, the second overcurrent protection triode Q32 colelctor electrode pass through by each actuator in fuse F31 connection control systems
One resistance R31, the second overcurrent protection triode Q32 power for each actuator (motor)；First overcurrent protection triode Q31 base
Pole connects the second overcurrent protection triode Q32 emitter stage, and emitter stage connects the output of LDC circuits, and colelctor electrode connects the second overcurrent protection
Triode Q32 base stage；Second resistance R32 is connected across between the first overcurrent protection triode Q31 emitter stage and colelctor electrode；The
Two overcurrent protection triode Q32 base stage is grounded by the 5th resistance R35 and switching tube Q33；Switching tube Q33 base stage passes through
Three resistance R33 connect controller output, and the 4th resistance R34 is connected between switching tube Q33 base stage and ground；Six, the 8th resistance
R36, R38 are serially connected between output and the ground of motor power supply current foldback circuit, the electricity between the six, the 8th resistance R36, R38
Position connects the input of controller by the 7th resistance R37.Output filter capacitor C37 is connected to the defeated of motor power supply current foldback circuit
Go out between ground.
When motor shorted to earth, first resistor R31 electric current moment increase is flowed through so that be carried in first resistor R31
Cut-in voltage of the voltage at both ends more than the first overcurrent protection triode Q31.Now, the first overcurrent protection triode Q31 is opened,
Second overcurrent protection triode Q32 base voltage is close to voltage-stablizer LDO output voltage, the second overcurrent protection triode
Q32 is opened；Subsequent second overcurrent protection triode Q32 because between its base stage and emitter stage voltage be brought down below cut-in voltage close
Close, thus play overcurrent protection.Fuse F31 is also to play a part of overcurrent protection, and its reaction speed compares triode
It hurry up, when immediate current is very big, will fuse, whole electric current is played a protective role.When controller exports high electricity by I/O mouths
When ordinary mail number gives switching tube Q33, switching tube Q33 is connected, and voltage-stablizer LDO output voltages pass through current foldback circuit and fuse
F31 is supplied to each actuator.When controller exports low level, closing switch pipe Q33, voltage-stablizer LDO is without output.Controller leads to
The 7th resistance R37 collection feedback voltages are crossed, are monitored to exporting to the voltage of actuator, if output voltage is larger, explanation
Circuit normal work；When output voltage very little, illustrating short circuit, controller output low level control switching tube Q33 is closed,
Every opening switching tube Q33 again for a period of time, then voltage is monitored, until output voltage is normal.
As shown in fig. 6, the chopper speed control module includes first order amplifier, second level amplifier, filter network, feedback
Circuit；The first order amplifier and second level amplifier form PI controllers, and filter network includes resistance R706, R702 and filter
Ripple C701；Feedback circuit includes the feedback resistance R703 and feedback capacity C702 being serially connected；The pwm signal output of controller
End is connected by filter network with the normal phase input end of second level amplifier, and the output end of second level amplifier passes through feedback resistance
R703 and feedback capacity C702 is connected to the output of the normal phase input end and power module of first order amplifier, second level amplifier
Output end be directly connected to air blower, the inverting input of first order amplifier is connected to the feedback signal output of air blower,
The output of first order amplifier is connected to the inverting input of second level amplifier.
Controller export different duty pwm control signal, the pwm control signal by chopper speed control module export to
Air blower, PI controls are carried out to air blower, to adjust the size of discharge quantity of fan.
Claims (3)
1. a kind of electric air-conditioning control system, including controller, power module, evaporator temperature sensor, inner-outer circulation pattern
Actuator, compressor, temperature actuator, pattern actuator, air blower；The power module is powered for whole control system, is steamed
Hair device temperature sensor is connected with controller；Controller passes through driving chip and inner-outer circulation pattern actuator, compressor, temperature
Actuator, pattern actuator connection, is connected by chopper speed control module with air blower；Characterized by further comprising temperature adjustment to believe
Number Acquisition Circuit, motor power supply current foldback circuit and air quantity Regulate signal Acquisition Circuit；The power module include two
The filter capacitor (C11) being disposed vertically on circuit board and (C12), fast recovery diode (D11), Transient Suppression Diode (D12),
Low-capacitance ceramic condenser (C13), big capacitance electrochemical capacitor (C14), voltage-stablizer (LDO), ceramic filter capacitor (C15), electrolysis filter
Ripple electric capacity (C16)；Fast recovery diode (D11) forward direction is connected to the positive pole and voltage-stablizer (LDO) of dc source (BAT)
Between input, the output termination controller of voltage-stablizer (LDO)；Two filter capacitors (C11) and (C12) are connected on dc source
(BAT) between positive pole and power supply ground；Transient Suppression Diode (D12) Opposite direction connection is in the input and electricity of voltage-stablizer (LDO)
Between the ground of source；Low-capacitance ceramic condenser (C13) and big capacitance electrochemical capacitor (C14) filter circuit in parallel formed are connected to voltage stabilizing
Between the input and power supply ground of device (LDO), the filter of ceramic filter capacitor (C15) composition in parallel with electrolysis filter capacitor (C16)
Wave circuit is connected between output end and the power supply ground of voltage-stablizer (LDO)；The voltage-stablizer (LDO) is using one programmable small
Power DCDC circuits, the circuit include input filtering electric capacity (C21), inductance (L21), DCDC voltage stabilizing chips, diode
(D21) feedback circuit, being made up of feedback resistance (R21) and programmable resistance (R22), feedback circuit filter capacitor (C23) are defeated
Go out to hold filter capacitor (C22)；Inductance (L21) and diode (D21) are serially connected in the input and output end of whole voltage-stablizer (LDO)
Between, diode (D21) forward direction is connected between inductance (L21) and voltage-stablizer (LDO) output end；Filter capacitor (C21) connects
Between voltage-stablizer (LDO) input and power supply ground；The output end of whole voltage-stablizer (LDO) is by wire parallel with one another and instead
Current feed circuit filter capacitor (C23) is connected to feedback resistance (R21), and the other end of feedback resistance (R21) passes through programmable feedback electricity
Hinder (R22) with connecing power supply；The voltage input end Vin of DCDC voltage stabilizing chips is connected to voltage-stablizer (LDO) input, switching signal
Input SW is connected to diode (L21) positive pole, and feedback signal input terminal is connected to feedback resistance (R21) and programmable resistance
(R22) between；Output end filter capacitor (C22) is connected between voltage-stablizer (LDO) output end and power supply ground；The temperature adjustment
Signal acquisition circuit is connected with controller, and signal is adjusted for collecting temperature；Temperature adjustment signal acquisition circuit includes first
Road divider resistance (R61), tie point output resistance (R62), tie point filter capacitor (C61), the second branch road divider resistance
(R64), the second branch road output resistance (R63), the second branch road filter capacitor (C62), the temperature being made up of multiple resistant series are adjusted
Whole potentiometer resistance；Current potential between tie point divider resistance (R61) and temperature adjustment potentiometer resistance passes through tie point
Output resistance (R62) connects controller, and tie point filter capacitor (C61) is connected between controller input and power supply ground；
Current potential between second branch road divider resistance (R64) and temperature adjustment potentiometer resistance passes through the second branch road output resistance (R63)
Controller is connected, the second branch road filter capacitor (C62) is connected between controller input and power supply ground；The motor was powered
Flowing protection circuit is included by first, second overcurrent protection triode (Q31), (Q32), first resistor (R31), second resistance
(R32) current foldback circuit of composition, fuse (F31), by switching tube (Q33) and the three, the four, the 5th resistance (R33),
(R34), the on-off circuit of (R35) composition, the Voltage Feedback being made up of the six, the seven, the 8th resistance (R36), (R37), (R38)
Circuit, output filter capacitor (C37)；First, second overcurrent protection triode (Q31), (Q32) are PNP type triode, switching tube
(Q33) it is NPN type triode；The output of power module connects the second overcurrent protection triode (Q32) by first resistor (R31)
Emitter stage, the colelctor electrode of the second overcurrent protection triode (Q32) passes through fuse (F31) and connects each execution in control system
Device, powered by first resistor (R31), the second overcurrent protection triode (Q32) for each actuator；First overcurrent protection triode
(Q31), its base stage connects the emitter stage of the second overcurrent protection triode (Q32), and emitter stage connects the output of power module, and colelctor electrode connects
The base stage of second overcurrent protection triode (Q32)；Second resistance (R32) is connected across the hair of the first overcurrent protection triode (Q31)
Between emitter-base bandgap grading and colelctor electrode；The base stage of second overcurrent protection triode (Q32) passes through the 5th resistance (R35) and switching tube (Q33)
Ground connection；The base stage of switching tube (Q33) connects controller by 3rd resistor (R33) and exported, and the 4th resistance (R34) is connected to switching tube
(Q33) between base stage and ground；Six, the 8th resistance (R36), (R38) are serially connected in the output of motor power supply current foldback circuit
Between ground, the current potential between the six, the 8th resistance (R36), (R38) connects the input of controller by the 7th resistance (R37)；It is defeated
Go out filter capacitor (C37) to be connected between output and the ground of motor power supply current foldback circuit；The air quantity Regulate signal collection
Circuit includes air quantity regulation divider resistance (R46), air quantity regulation potentiometer resistance, air quantity regulation output end resistance (R47) and filter
Ripple electric capacity (C41)；Air quantity adjusts potentiometer resistance by five resistance (R41), (R42), (R43), (R44), (R45) series connection group
Into；Current potential between air quantity regulation divider resistance (R46) and air quantity regulation potentiometer resistance adjusts output end resistance by air quantity
(R47) controller is connected.
2. electric air-conditioning control system according to claim 1, it is characterised in that also including mode adjustment signal acquisition electricity
Road；The mode adjustment signal acquisition circuit includes mode adjustment divider resistance (R51), mode adjustment potentiometer resistance, pattern
Adjust output end resistance (R52) and filter capacitor (C51)；Mode adjustment divider resistance (R51) and mode adjustment potentiometer resistance
Between current potential pass through mode adjustment output end resistance (R52) connect controller；Filter capacitor (C51) is connected to controller input
Between end and power supply ground.
3. electric air-conditioning control system according to claim 1, it is characterised in that the chopper speed control module includes first
Level amplifier, second level amplifier, filter network, feedback circuit；The first order amplifier and second level amplifier form PI
Controller, filter network include two resistance (R706, R702) and filtering (C701)；Feedback circuit is anti-including being serially connected
Feed resistance (R703) and feedback capacity (C702)；The pwm signal output end of controller passes through filter network and second level amplifier
Normal phase input end connection, the output end of second level amplifier is connected to by feedback resistance (R703) and feedback capacity (C702)
The output of the normal phase input end and power module of first order amplifier, the output end of second level amplifier are directly connected to air blast
Machine, the inverting input of first order amplifier are connected to the feedback signal output of air blower, and the output of first order amplifier connects
It is connected to the inverting input of second level amplifier.
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| CN201510408815.8A CN104960399B (en) | 2015-07-14 | 2015-07-14 | A kind of electric air-conditioning control system |
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| CN108092575A (en) * | 2018-01-03 | 2018-05-29 | 江西盈克电子科技有限公司 | A kind of bluetooth motor-driven dining table governor |
| CN113671250B (en) * | 2021-07-20 | 2022-06-10 | 云南电网有限责任公司红河供电局 | Accurate identification and detection system for power of short-circuit-prevention high-voltage isolating switch driving motor |
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| CN201191758Y (en) * | 2008-05-15 | 2009-02-04 | 佛山市中格威电子有限公司 | Five-in-one digital general air conditioner protector |
| CN101888185A (en) * | 2009-05-12 | 2010-11-17 | 中国电子为华实业发展有限公司 | Switch power circuit and power supply short circuit over-current protection circuit |
| CN102729767A (en) * | 2011-04-16 | 2012-10-17 | 福瑞德科技有限公司 | Air conditioner and heater integrated control system for electronic automobile |
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| JPS58179748A (en) * | 1982-04-16 | 1983-10-21 | Hitachi Ltd | Controller for temperature of air conditioner |
| CN102223120A (en) * | 2010-04-15 | 2011-10-19 | 山东欧锴空调科技有限公司 | Method for controlling permanent magnet brushless direct-current motor and driver |
| CN101985270A (en) * | 2010-07-26 | 2011-03-16 | 浙江吉利汽车研究院有限公司 | Air conditioner control device for automatically converting internal and external circulation of automobile |
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|---|---|---|---|---|
| CN201191758Y (en) * | 2008-05-15 | 2009-02-04 | 佛山市中格威电子有限公司 | Five-in-one digital general air conditioner protector |
| CN101888185A (en) * | 2009-05-12 | 2010-11-17 | 中国电子为华实业发展有限公司 | Switch power circuit and power supply short circuit over-current protection circuit |
| CN102729767A (en) * | 2011-04-16 | 2012-10-17 | 福瑞德科技有限公司 | Air conditioner and heater integrated control system for electronic automobile |
| CN103166557A (en) * | 2011-12-12 | 2013-06-19 | 中山北京理工大学研究院 | Small wind power generation power controller |
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