CN106598094B - A kind of control system and method for outer control variable displacement compressor - Google Patents
A kind of control system and method for outer control variable displacement compressor Download PDFInfo
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- CN106598094B CN106598094B CN201611034406.7A CN201611034406A CN106598094B CN 106598094 B CN106598094 B CN 106598094B CN 201611034406 A CN201611034406 A CN 201611034406A CN 106598094 B CN106598094 B CN 106598094B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
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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
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/625—Regulating voltage or current wherein it is irrelevant whether the variable actually regulated is ac or dc
Abstract
The present invention provides a kind of control system of outer control variable displacement compressor and methods, the first pid control module is set in evaporator temperature control circuit, to obtain target current as calculation process to the temperature gap of target evaporator temperature value and evaporator actual temperature value, and using the current differential of this target current and solenoid valve actual current as the input of electromagnetic valve current control loop, the PWM current signals of corresponding duty ratio are obtained after doing calculation process by the second pid control module, thus PWM current signals control the discharge capacity of compressor, make actual electromagnetic valve electric current close to desired solenoid valves electric current, to make actual evaporator temperature close to target evaporator temperature, and then realize evaporator temperature and the control of electromagnetic valve current synchronous precision.Meanwhile by searching for different pid parameters, it can be ensured that under different environment temperatures, the setting of different target evaporator temperatures, can accurately control evaporator temperature close to target evaporator temperature, the wider also more efficient intelligence of application range.
Description
Technical field
The present invention relates to variable compressor control technology field more particularly to a kind of controls of outer control variable displacement compressor
System and method processed.
Background technology
With the fast development of auto industry, requirement of the people to air conditioning for automobiles performance and its comfort is constantly promoted, vapour
Vehicle scientific and technological circle are more deep for the research of automobile air conditioning technology, and dependent formula fixed displacement compressor truck air-conditioning system is come
It says, on the one hand, in the case of temperature fluctuation is larger in the car, have because the irreversible loss that the frequent start-stop of system generates enables the system to consumption
Increased；On the other hand, compressor cycle clutch will also result in severe jamming to automobile engine work.As a result, in order to full
The requirement of sufficient air conditioning for automobiles load, variable compressor come into being.
Outer control variable displacement compressor have the characteristics that no-clutch inhale put, lightweight makes the cornering ability of automobile carry
High more, the displacement control of optimization is but also fuel consumption reduces more.Outer control variable displacement compressor is in original machine tool tune
A solenoid valve is increased on the basis of section valve.Solenoid valve adjusts the pressure in crankcase by changing its electric current
To realize the aperture regulation of valve：When controlling pressure of inspiration(Pi) of the crankcase pressure equal to compressor, valve openings are maximum, compression
Machine is in maximum pump discharge；Crankcase pressure is controlled higher than after pressure of inspiration(Pi), valve openings reduce, and the discharge capacity of compressor reduces.
But traditional algorithm only considers control of the variable compressor to evaporator temperature, is not accounting for current protection
In the case of, the electric current of solenoid valve it is excessive or it is too small solenoid valve can all be damaged, and the solenoid valve service life is made to receive influence；Separately
Outdoor air conditioner refrigeration system is a complicated nonlinear system, and traditional algorithm only considers under single operating mode to the whole of control parameter
Fixed, to cause under other operating modes, control effect is poor.
Invention content
The present invention provides a kind of control system and method for outer control variable displacement compressor, and it is a kind of for controlling to solve setting
The system that the evaporator temperature control circuit and electromagnetic valve current control circuit of evaporator temperature and electromagnetic valve current processed are combined,
And a kind of double circuit PID controls applied to evaporator temperature control circuit and electromagnetic valve current control circuit are set in this system
The control method of system, to realize the technical issues of evaporator temperature and electromagnetic valve current synchronous precision control.
In order to solve the above technical problems, the present invention provides a kind of control system of outer control variable displacement compressor, is equipped with the
The target evaporator temperature setting module of one pid control module and connection first pid control module, evaporator actual temperature
Acquisition module and the first pid parameter chosen module, the target evaporator temperature of the target evaporator temperature setting module setting
The temperature gap of value and the evaporator actual temperature value of evaporator actual temperature acquisition module acquisition inputs first PID control
Module, the first selected pid parameter of the first pid control module combination pid parameter chosen module make the temperature gap
Comparison for the first time judges, with after assignment operation, to export target current；
It is additionally provided with the second pid control module for obtaining and handling the target current and connection the 2nd PID controls
Actual current acquisition module, the PWM output modules of molding block, the PWM output modules are also connected with the actual current acquisition mould
Block；The target current of the first pid control module output as solenoid valve target current, use by the actual current acquisition module
The 2nd PID is inputted in the current differential of acquisition solenoid valve actual current, the solenoid valve target current and solenoid valve actual current
Control module, second pid control module combine the second pid parameter to make second of comparison judgement and assign the current differential
After being worth operation, output adjusts electric current to the PWM output modules, and the PWM output modules are according to adjusting electric current output pair
The PWM current signals answered, the outer control variable displacement compressor carry out the aperture regulation of valve according to the PWM current signals,
And the PWM current signals are returned into actual current acquisition module.
Further, the target evaporator temperature setting module, evaporator actual temperature acquisition module, the first PID controls
Molding block and pid parameter chosen module form evaporator temperature control circuit；Second pid control module, actual current are adopted
Collect module and PWM output modules form electromagnetic valve current control circuit.
Further, the evaporator temperature control circuit is additionally provided with the air blower wind of connection pid parameter chosen module
Fast acquisition module and environment acquisition module；The pid parameter chosen module is according to the wind of current wind speed of blast blower acquisition module
The environment temperature of speed and temperature collection module searches pid parameter table, obtains the first pid parameter；Before the pid parameter table is
The environment temperature demarcated, wind speed compare table with the first pid parameter in phase experiment；It is soft that the pid parameter table is solidificated in program
It is directly transferred for the first pid control module in part.
Preferably, the evaporator temperature control circuit executes primary, the electromagnetic valve current control circuit every 1s-3s
It is executed every 0.1s-0.5s primary.
Further, the PWM current signals have feedback effect to the evaporator actual temperature acquisition module.
The present invention also provides a kind of control methods of outer control variable displacement compressor, include the following steps：
S1. target evaporator temperature setting module is obtained with evaporator actual temperature acquisition module works as front evaporator target temperature
Degree setting value and evaporator actual temperature value simultaneously make difference operation, then temperature gap is input to the first pid control module；
S2. the first selected pid parameter of the first pid control module combination pid parameter chosen module is to the temperature
After difference makees comparison judgement for the first time and assignment operation, output target current to the second pid control module；
S3. the second pid control module is made the actual current of target current and actual current acquisition module poor, obtains electric current
Difference；
S4. the second pid control module makees second of comparison judgement and assignment in conjunction with the second pid parameter to the current differential
After operation, output adjusts electric current to institute's PWM output modules；
S5.PWM output modules export PWM current signals according to the adjusting electric current；
S6. outer control variable displacement compressor carries out the aperture regulation of valve according to the PWM current signals,
And the PWM current signals are returned into actual current acquisition module.
Further, in the step S2, comparison judges for the first time and assignment operation process is：
If the temperature gap is greater than or equal to temperature difference bearing value, first pid control module according to temperature gap and
After the first selected pid parameter operation of pid parameter chosen module obtains initial target electric current, then by the initial target electric current with
Target current upper limit value and target current lower limit value compare, if initial target electric current is more than the target current upper limit value,
The target current upper limit value is assigned a value of target current, if the initial target electric current is less than target current upper limit value and is more than mesh
Floor level of electric current is marked, then the initial target electric current is assigned a value of target current, if the initial target electric current is less than target current
Lower limiting value, then the target current lower limit value be assigned a value of target current；
If the temperature gap is less than the temperature difference bearing value, program is transported according to target evaporator temperature setting value
The predetermined current of calculating is assigned a value of target current.
Further, in the step S4, second of comparison judges and assignment operation process is：
If the current differential is less than current difference bearing value, exported using actual current as electric current is adjusted；
If the current differential is more than 2 times of the current difference bearing value, the half of current differential is input to
Second pid control module simultaneously participates in operation, adjusted electric current；
If the current differential is more than current difference bearing value and less than 2 times of the current difference bearing value, by electric current
Difference is input to the second pid control module and participates in operation, adjusted electric current.
Preferably, the step S1-S2 is executed primary every 1s-3s, and the step S3-S5 is executed every 0.1s-0.5s
Once.
Preferably, the temperature difference bearing value is 0.5 DEG C；The current difference bearing value is 10mA.
The control system and method for a kind of outer control variable displacement compressor provided by the invention control electricity in evaporator temperature
Road sets the first pid control module, to make operation to the temperature gap of target evaporator temperature value and evaporator actual temperature value
Processing obtains target current, and the current differential of this target current and solenoid valve actual current is controlled back as electromagnetic valve current
The input on road obtains the PWM current signals of corresponding duty ratio, thus PWM electric currents after doing calculation process by the second pid control module
Signal controls the discharge capacity of compressor, makes actual electromagnetic valve electric current close to desired solenoid valves electric current, to make actual evaporator temperature
Degree realizes evaporator temperature and the control of electromagnetic valve current synchronous precision close to target evaporator temperature.Only have in system
In the case of one output quantity, control evaporator temperature control circuit is transported with electromagnetic valve current control circuit with different time frequency
Row avoids two circuits because of the close generation resonance of working frequency, to protect solenoid valve.Meanwhile joining by searching for different PI
Number, it can be ensured that under different environment temperatures, the setting of different target evaporator temperatures, can accurately control evaporator temperature
Close to target evaporator temperature, the wider also more efficient intelligence of application range.
Description of the drawings
Fig. 1 is a kind of function structure chart of the control system of outer control variable displacement compressor provided in an embodiment of the present invention；
Fig. 2 is a kind of the second pid parameter of the control system of outer control variable displacement compressor provided in an embodiment of the present invention
It is selected to realize block diagram；
Fig. 3 is a kind of work flow diagram of the control method of outer control variable displacement compressor provided in an embodiment of the present invention；
Fig. 4 is that a kind of first time comparison of the control method of outer control variable displacement compressor provided in an embodiment of the present invention is sentenced
Disconnected and assignment operation algorithm flow chart；
Fig. 5 is that a kind of second of comparison of the control method of outer control variable displacement compressor provided in an embodiment of the present invention is sentenced
Disconnected and assignment operation algorithm flow chart.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.It is only below preferred embodiment, does not constitute limiting the scope of the invention.
It is a kind of module knot of the control system of outer control variable displacement compressor provided in an embodiment of the present invention referring to Fig. 1
Composition.In the present embodiment, the control system of a kind of outer control variable displacement compressor is equipped with the first pid control module
10 and the target evaporator temperature setting module 11 of connection first pid control module 10, evaporator actual temperature acquire mould
Block 12 and the first pid parameter chosen module 13, the target evaporator temperature that the target evaporator temperature setting module 11 is set
Value TobjThe evaporator actual temperature value T acquired with evaporator actual temperature acquisition module 12realTemperature gap δ T input described in
First pid control module 10, the first pid parameter that first pid control module 10 combines pid parameter chosen module 13 selected
After making comparison judgement for the first time and assignment operation to the temperature gap δ T, target current A is exportedobj；
It is additionally provided with for obtaining and handling the target current AobjThe second pid control module 20 and connection described second
Actual current acquisition module 21, the PWM output modules 22 of pid control module 20, the PWM output modules 22 are also connected with the reality
Border current acquisition module 21；The target current A that first pid control module 20 exportsobjAs solenoid valve target current, institute
Actual current acquisition module 21 is stated for acquiring solenoid valve actual current, the solenoid valve target current and solenoid valve actual current
ArealCurrent differential δ A input the second pid control module 20, second pid control module 20 ties the current differential δ A
It closes the second pid parameter and makees second of comparison judgement with after assignment operation, output adjusts electric current AadjTo the PWM output modules 22
The PWM output modules 22 are according to the adjusting electric current AadjCorresponding PWM current signals are exported, the external control type becomes discharge capacity pressure
Contracting machine carries out the aperture regulation of valve according to the PWM current signals, and the PWM current signals are adopted back to actual current
Collect module 21, and the PWM current signals have feedback effect to the evaporator actual temperature acquisition module 12.
In the present embodiment, the target evaporator temperature setting module 11, evaporator actual temperature acquisition module 12,
One pid control module 10 and pid parameter chosen module 13 form evaporator temperature control circuit 1 and in this, as main circuit, institutes
It states evaporator temperature control circuit 1 to execute once every fixed time period 1s-3s, takes 2s here；Second pid control module
20, actual current acquisition module 21 and PWM output modules 22 form electromagnetic valve current control circuit 2 and as secondary circuits, described
Electromagnetic valve current control circuit executes once every fixed time period 0.1s-0.5s, takes 0.3s here.
It is a kind of the 2nd PID of the control system of outer control variable displacement compressor provided in an embodiment of the present invention referring to Fig. 2
Parameter is selected to realize block diagram.In the present embodiment, the evaporator temperature control circuit 1 is additionally provided with connection pid parameter and selectes mould
The wind speed of blast blower acquisition module 14 and environment acquisition module 15 of block 13；The pid parameter chosen module 13 is according to current drum
The wind speed V of wind turbine wind speed acquisition module 14windWith the environment temperature T of temperature collection module 15outPid parameter table is searched, is obtained
Take the first pid parameter；The pid parameter table is the environment temperature T demarcated in pre-stage testout, wind speed VwindJoin with the first PID
Several control tables；The pid parameter table is solidificated in program software and is directly transferred for the first pid control module 20.
Participate in Fig. 3, be Fig. 3 be a kind of outer control variable displacement compressor provided in an embodiment of the present invention control method work
Make flow chart.In the present embodiment, a kind of control method of outer control variable displacement compressor, includes the following steps：
S1. target evaporator temperature setting module 11 is obtained with evaporator actual temperature acquisition module 12 works as front evaporator mesh
Mark desired temperature TobjWith evaporator actual temperature value TrealAnd make difference operation, then temperature gap δ T are input to the first PID
Control module 10；
S2. first pid control module 10 in conjunction with pid parameter chosen module 13 select pid parameter to the temperature
Value of delta T makees comparison for the first time and judges, with after assignment operation, to export target current AobjTo the second pid control module 20；
S3. the second pid control module 20 is by target current AobjWith the actual current A of actual current acquisition module 21realMake
Difference obtains current differential δ A；
S4. the second pid control module 20 in conjunction with the second pid parameter to the current differential δ A make second comparison judge and
After assignment operation, output adjusts electric current AadjTo institute's PWM output modules 23；
S5.PWM output modules 23 are according to the adjusting electric current AadjExport PWM current signals；
S6. outer control variable displacement compressor carries out the aperture regulation of valve according to the PWM current signals,
And the PWM current signals are returned into actual current acquisition module 21.
It it is a kind of first time of the control method of outer control variable displacement compressor provided in an embodiment of the present invention with reference to figure 4
Comparison judges and the algorithm flow chart of assignment operation.In the step S2, comparison judges for the first time and assignment operation process is：
If the temperature gap δ T are greater than or equal to temperature difference bearing value Tmax, first pid control module 10 is according to temperature
The pid parameter operation that value of delta T and pid parameter chosen module 13 are selected obtains initial target electric current AstAfterwards, then by the initial mesh
Mark electric current AstWith target current upper limit value AupWith target current lower limit value AdnIt compares, if initial target electric current AstMore than described
Target current upper limit value Aup, then the target current upper limit value AupIt is assigned a value of target current AobjIf the initial target electric current
AstLess than target current upper limit value AupAnd it is more than target current lower limit value Adn, then the initial target electric current assignment AstFor target
Electric current AobjIf the initial target electric current AstLess than target current lower limit value Adn, then the target current lower limit value AdnAssignment
For target current Aobj；
If the temperature gap δ T are less than the temperature difference bearing value Tmax, then program is set according to target evaporator temperature
Value TobjAnd the predetermined current A calculatedpreIt is assigned a value of target current Aobj。
It is second of the control method of a kind of outer control variable displacement compressor provided in an embodiment of the present invention with reference to figure 5
Comparison judges and the algorithm flow chart of assignment operation.In the step S4, second of comparison judges and assignment operation process is：
If the current differential δ A are less than current difference bearing value Amax, then by actual current ArealAs adjusting electric current AadjIt is defeated
Go out, prevents from frequently adjusting output because of static error；
If the current differential δ A are more than the current difference bearing value AmaxTwice, then by the half of current differential
1/2 δ A are input to the second pid control module 20 and participate in operation, and adjusted electric current prevents the PWM current signals of final output
There is hyperharmonic reforming phenomena；
If the current differential δ A are more than current difference bearing value Amax, and less than 2 times of the current difference bearing value
2Amax, then current differential δ A are input to the second pid control module 20 and participate in operation, adjusted electric current Aadj。
In the present embodiment, the step S1-S2 is executed primary every fixed time period 1s-3s, and it is one to choose 2s here
A cycle, the step S3-S5 are executed once every fixed time period 0.1s-0.5s, and it is a cycle to choose 0.3s here；Institute
State temperature difference bearing value TmaxIt is 0.5 DEG C；The current difference bearing value AmaxFor 10mA.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of control system of outer control variable displacement compressor, it is characterised in that：Equipped with the first pid control module and connection institute
State the target evaporator temperature setting module, evaporator actual temperature acquisition module and the first pid parameter of the first pid control module
The target evaporator temperature value of chosen module, the target evaporator temperature setting module setting is acquired with evaporator actual temperature
The temperature gap of the evaporator actual temperature value of module acquisition inputs first pid control module, the first PID control mould
The first selected pid parameter of agllutination conjunction pid parameter chosen module makees comparison judgement for the first time to the temperature gap and assignment is transported
After calculation, target current is exported；
It is additionally provided with the second pid control module and connection the second PID control mould for obtaining and handling the target current
Actual current acquisition module, the PWM output modules of block, the PWM output modules are also connected with the actual current acquisition module；Institute
The target current of the first pid control module output is stated as solenoid valve target current, the actual current acquisition module is for adopting
Collect solenoid valve actual current, the current differential of the solenoid valve target current and solenoid valve actual current inputs the second PID control
Module, second pid control module combine second of the comparison judgement of the second pid parameter work and assignment to transport the current differential
After calculation, output adjusts electric current to the PWM output modules, and the PWM output modules export corresponding according to the adjusting electric current
PWM current signals, the outer control variable displacement compressor carry out the aperture regulation of valve according to the PWM current signals, and will
The PWM current signals return to actual current acquisition module.
2. a kind of control system of outer control variable displacement compressor as described in claim 1, it is characterised in that：The evaporator
Target temperature setting module, evaporator actual temperature acquisition module, the first pid control module and pid parameter chosen module composition
Evaporator temperature control circuit；Second pid control module, actual current acquisition module and PWM output modules form electromagnetism
Valve current control circuit.
3. a kind of control system of outer control variable displacement compressor as claimed in claim 2, it is characterised in that：The evaporator
Temperature-control circuit is additionally provided with the wind speed of blast blower acquisition module and environment acquisition module of connection pid parameter chosen module；It is described
Pid parameter chosen module is according to the environment temperature of the wind speed and temperature collection module of current wind speed of blast blower acquisition module
Pid parameter table is searched, the first pid parameter is obtained；The pid parameter table be pre-stage test in demarcate environment temperature, wind speed with
The control table of first pid parameter；The pid parameter table is solidificated in program software and is directly transferred for the first pid control module.
4. a kind of control system of outer control variable displacement compressor as claimed in claim 2, it is characterised in that：The evaporator
Temperature-control circuit executes once every 1s-3s, and the electromagnetic valve current control circuit executes primary every 0.1s-0.5s.
5. a kind of control system of outer control variable displacement compressor as claimed in claim 2, it is characterised in that：The PWM electricity
Stream signal has feedback effect to the evaporator actual temperature acquisition module.
6. a kind of control method of outer control variable displacement compressor, which is characterized in that include the following steps：
S1. target evaporator temperature setting module obtains current target evaporator temperature with evaporator actual temperature acquisition module and sets
Definite value and evaporator actual temperature value simultaneously make difference operation, then temperature gap is input to the first pid control module；
S2. the first selected pid parameter of the first pid control module combination pid parameter chosen module is to the temperature gap
After making comparison judgement for the first time and assignment operation, output target current to the second pid control module；
S3. the second pid control module is made the actual current of target current and actual current acquisition module poor, obtains current difference
Value；
S4. the second pid control module makees second of comparison judgement and assignment operation in conjunction with the second pid parameter to the current differential
Afterwards, output adjusts electric current to institute's PWM output modules；
S5.PWM output modules export PWM current signals according to the adjusting electric current；
S6. outer control variable displacement compressor carries out the aperture regulation of valve according to the PWM current signals, and the PWM is electric
It flows signal and returns to actual current acquisition module.
7. a kind of control method of outer control variable displacement compressor as claimed in claim 6, which is characterized in that the step S2
In, comparison judges for the first time and assignment operation process is：
If the temperature gap is greater than or equal to temperature difference bearing value, first pid control module is joined according to temperature gap and PID
After the first selected pid parameter operation of number chosen modules obtains initial target electric current, then by the initial target electric current and target
Current upper limit value and target current lower limit value compare, described if initial target electric current is more than the target current upper limit value
Target current upper limit value is assigned a value of target current, if the initial target electric current is less than target current upper limit value and more than target electricity
Limit value is flowed down, then the initial target electric current is assigned a value of target current, if the initial target electric current is less than target current lower limit
Value, then the target current lower limit value is assigned a value of target current；
If the temperature gap is less than the temperature difference bearing value, program is calculated according to target evaporator temperature setting value
Predetermined current be assigned a value of target current.
8. a kind of control method of outer control variable displacement compressor as claimed in claim 7, which is characterized in that in the step
In S4, second of comparison judges and assignment operation process is：
If the current differential is less than current difference bearing value, exported using actual current as electric current is adjusted；
If the current differential is more than 2 times of the current difference bearing value, the half of current differential is input to second
Pid control module simultaneously participates in operation, adjusted electric current；
If the current differential is more than current difference bearing value and less than 2 times of the current difference bearing value, by current differential
It is input to the second pid control module and participates in operation, adjusted electric current.
9. a kind of control method of outer control variable displacement compressor as claimed in claim 6, it is characterised in that：The step
S1-S2 is executed once every 1s-3s, and the step S3-S5 executes primary every 0.1s-0.5s.
10. a kind of control method of outer control variable displacement compressor as claimed in claim 8, it is characterised in that：The temperature difference
Bearing value is 0.5 DEG C；The current difference bearing value is 10mA.
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| CN107167694B (en) * | 2017-06-07 | 2019-09-20 | 惠州市德赛西威汽车电子股份有限公司 | A kind of solenoid valve earth fault detection circuit of automobile outer control variable displacement compressor |
| CN109017215B (en) * | 2018-07-26 | 2021-08-20 | 延锋伟世通电子科技（南京）有限公司 | PID + FF feedforward closed-loop control method based on PTC of pure electric vehicle |
| CN113655826A (en) * | 2020-05-12 | 2021-11-16 | 上汽通用汽车有限公司 | Temperature control method and temperature control system of evaporator |
| CN111993860B (en) * | 2020-08-31 | 2022-02-25 | 安徽江淮汽车集团股份有限公司 | Vehicle refrigeration system control method, equipment, storage medium and device |
| CN113323840A (en) * | 2021-06-30 | 2021-08-31 | 奇瑞商用车（安徽）有限公司 | Control method for external control variable displacement compressor |
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| CN202303770U (en) * | 2011-10-14 | 2012-07-04 | 惠州市德赛西威汽车电子有限公司 | Automobile air-conditioning control system capable of automatically controlling air speed of air blower |
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