CN106288197A - A kind of air conditioning control method based on pid algorithm and system thereof - Google Patents
A kind of air conditioning control method based on pid algorithm and system thereof Download PDFInfo
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- CN106288197A CN106288197A CN201610683415.2A CN201610683415A CN106288197A CN 106288197 A CN106288197 A CN 106288197A CN 201610683415 A CN201610683415 A CN 201610683415A CN 106288197 A CN106288197 A CN 106288197A
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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
- F24F11/0001—Control or safety arrangements for ventilation
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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
- F24F11/0001—Control or safety arrangements for ventilation
- F24F2011/0002—Control or safety arrangements for ventilation for admittance of outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides a kind of air conditioning control method based on pid algorithm and system thereof, by the wind pushing temperature of air-conditioning, return air temperature and humidity in collection machine room；According to described wind pushing temperature, return air temperature and default computer room temperature, control number and the time of startup that air-conditioning inner compressor starts；Utilize increment type PID algorithm, according to the temperature approach between described wind pushing temperature and return air temperature and default computer room temperature, calculate the optimum output frequency of compressor；Optimum output frequency according to compressor regulates the optimized rotating speed of blower fan simultaneously；Control compressor carry out cold output with described optimum output frequency and control blower fan with the rotational speed after regulation.The method of the invention and system thereof, regulated compressor rotary speed by converter, the cold that air-conditioning output is less, to reach the balance of cold and heat in machine room, reduce the start-stop time of compressor, reduce the operation energy consumption of compressor, so that the operation of air-conditioning is more energy efficient.
Description
Technical field
The present invention relates to air conditioner controlling technology field, a kind of air conditioning control method based on pid algorithm
And system.
Background technology
At present, the user using tradition IDC data center is essentially telecom operators, data center services business, bank, doctor
Institute, the big machine room of government organs, such machine room uses direct-expansion type precision air conditioner in high-volume, by starting and stopping compressor
Mode, the output cold of regulation air-conditioning, general partially have that air-conditioner efficiency is low, energy consumption is high, high frequent start and stop cause service life
The phenomenons such as shortening.
For many years, the phenomenon huge along with the power consumption of data center highlights day by day, and its operation cost pressure increases, in industry
Also in the energy-conservation invention of continuous study of various, main direction of studying is to improve machine room air current composition, indirectly promotes the heat exchange effect of air-conditioning
Rate, thus realize the reduction energy consumption on certain procedures, but the energy consumption of air-conditioning is the highest, and the most further energy-saving type air conditioner has
To be excavated.
But at house and the refrigerating field of general commercial building, there is the invention that compressor is done energy saving optimizing, but
Because the difference of application scenario, under the operating mode that air-conditioning is double-compressor, its control method is that a converter controls two simultaneously
Compressor and indoor fan, and make two compressors start or stop, and the rotating speed rate of descent of indoor fan and compression simultaneously
Machine rotating speed rate of descent keeps consistent.This invention is applied on air conditioner in machine room, and the shortcoming existed has: the span of control of its cold is narrow
(about 70%～100%), in the case of machine room low-load, hence it is evident that adds computer room temperature fluctuation change, can surpass the most easily
Go out the change fluctuation that machine room allows, it is impossible to meet machine room Wind Volume, little break difference and the variations in temperature fluctuation requirement such as little.This kind of indoor
The regulative mode of rotation speed of fan, in easily causing machine room, wind pushing temperature is too low, and in causing machine room, the inlet temperature of information technoloy equipment is too low；
There is the defect of machine room humidity control accuracy difference.
Therefore, prior art awaits further improving.
Summary of the invention
In view of above-mentioned weak point of the prior art, it is an object of the invention to provide the user one and calculate based on PID
The air conditioning control method of method and system thereof, overcome in prior art the inlet temperature of information technoloy equipment in machine room too low, exist in machine room
The defect of humid control low precision.
It is as follows that the present invention solves the technical scheme that technical problem used:
A kind of air conditioning control method based on pid algorithm, wherein, comprises the following steps:
The wind pushing temperature of air-conditioning, return air temperature and humidity in step A, collection machine room；
Step B, according to described wind pushing temperature, return air temperature and default computer room temperature, control the number that air-conditioning inner compressor starts
With the time of startup；
Step C, utilize increment type PID algorithm, according to the temperature approach between described wind pushing temperature and return air temperature and default machine room
Temperature, calculates the optimum output frequency of compressor；Optimum output frequency according to compressor regulates the rotating speed of blower fan simultaneously；
Step D, control compressor carry out cold output with described optimum output frequency and control blower fan turns with the rotating speed after regulation
Dynamic.
Described air conditioning control method based on pid algorithm, wherein, described step B includes:
Step B1, when meeting condition T2 > T+k1 time, and compressor-free run time, then start the first compressor；
Step B2, when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and keeps the first Preset Time
After TIME1, then start the second compressor；
Step B3, when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is minima, then keep
After second preset time T IME2, then stop the second compressor or the operation of the first compressor；
Step B4, when meeting condition T2, < during T-k4, and the rotating speed of the first compressor of being currently running or the second compressor is for
Little value, and after keeping the 3rd preset time T IME3, then stop all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
Described air conditioning control method based on pid algorithm, wherein, described in described step C, increment type PID algorithm passes through
Equation below one calculates:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature；Described Kp, Ki and Kd are constant.
Described air conditioning control method based on pid algorithm, wherein, also includes in described step C:
Step C1, increment type PID algorithm and adaptive algorithm being combined, the optimum being calculated compressor by equation below two is defeated
Go out frequency:
△uk =△uk(1+ Kx)；
Wherein: Kx=| preset value-value of feedback |/preset value × 100%；When Kx < when 10%, △ uk =△uk；Work as Kx >=
When 10%, △ uk =△uk(1+ Kx)；Described value of feedback is the return air temperature of air-conditioning, and described preset value is for presetting return air temperature.
Described air conditioning control method based on pid algorithm, wherein, described step C also includes:
Step C2, the synchronization of the rotating speed of blower fan Yu compressor is arranged after, according to wind pushing temperature, return air humidity, preset the
The rotating speed of blower fan is adjusted by one protection value, default second protection value, default 3rd protection value and the 4th protection value；
If wind pushing temperature is less than presetting the first protection value, then the rotating speed controlling blower fan cannot be less than presetting the second protection value；If returning
Rheumatism degree is more than the 3rd protection value, then control rotation speed of fan and cannot be greater than the 4th protection value.
A kind of air-conditioner control system based on pid algorithm, wherein, including: multiple compressors and each compressor set up one
One corresponding multiple converters of connecting, blower fan all set up with all blower fans be connected shared speed regulator, wind pushing temperature sensor,
Return air temperature sensor, return air humidity sensor and controller；
The air-supply temperature of air-conditioning in described wind pushing temperature sensor, return air temperature sensor and return air humidity sensor collection machine room
Degree, return air temperature and humidity, be sent to controller；
Described controller includes: starts number and time control module, optimal data computing module and controls to run module；
Described startup number and time control module, for according to described wind pushing temperature, return air temperature and default computer room temperature, control
The number that air-conditioning inner compressor processed starts and the time of startup；
Described optimal data computing module, is used for utilizing increment type PID algorithm, according between described wind pushing temperature and return air temperature
Temperature approach and default computer room temperature, calculate the optimum output frequency of compressor, simultaneously according to the optimum output frequency of compressor
The rotating speed of rate regulation blower fan；
Control to run module, be used for controlling compressor and carry out cold output with described optimum output frequency and control blower fan with regulation
After rotational speed.
Described air-conditioner control system based on pid algorithm, wherein, described startup number and time control module include:
First condition identifying unit, for when meeting condition T2 > T+k1 time, and when compressor-free runs, then start the first compression
Machine；
Second condition identifying unit, for when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and protects
After holding the first preset time T IME1, start the second compressor；
Third condition identifying unit, for when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is
Minima, then after keeping the second preset time T IME2, then stop the second compressor or the operation of the first compressor；
Fourth condition identifying unit, for when meeting condition T2, < during T-k4, and the first compressor or second being currently running is pressed
The rotating speed of contracting machine is minima, and after keeping the 3rd preset time T IME3, then stops all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
Described air-conditioner control system based on pid algorithm, wherein, described increment type PID algorithm pass through equation below
One calculates:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature, and described Kp is proportionality coefficient；Ki: integral coefficient；Kd: differential system
Number.
Described air-conditioner control system based on pid algorithm, wherein, described optimal data computing module, it is additionally operable to increase
Amount formula pid algorithm and adaptive algorithm combine, and are calculated the optimum output frequency of compressor by equation below two:
△uk =△uk(1+Kx)；
Kx=(preset value-value of feedback)/preset value × 100%；When Kx < when 10%, △ uk =△uk；
As Kx >=10% time, △ uk =△uk(1+ Kx)；
Wherein, described value of feedback is the return air temperature of air-conditioning, and described preset value is for presetting return air temperature.
Described air-conditioner control system based on pid algorithm, wherein, described optimal data computing module, it is additionally operable to wind
After the rotating speed of machine and the synchronization of compressor are arranged, according to wind pushing temperature, return air humidity, preset the first protection value, preset the
The rotating speed of blower fan is adjusted by two protection values, default 3rd protection value and the 4th protection value；
If wind pushing temperature is less than presetting the first protection value, then the rotating speed controlling blower fan cannot be less than presetting the second protection value；If returning
Rheumatism degree is more than the 3rd protection value, then control rotation speed of fan and cannot be greater than the 4th protection value.
Beneficial effect, the invention provides a kind of air conditioning control method based on pid algorithm and system thereof, passes through harvester
The wind pushing temperature of air-conditioning, return air temperature and humidity in room；According to described wind pushing temperature, return air temperature and default computer room temperature, control
The number that air-conditioning inner compressor processed starts and the time of startup；Utilize increment type PID algorithm, according to described wind pushing temperature and return air temperature
Temperature approach between degree and default computer room temperature, calculate the optimum output frequency of compressor；Simultaneously according to the optimum of compressor
The optimized rotating speed of output frequency regulation blower fan；Control compressor carry out cold output with described optimum output frequency and control blower fan
With the rotational speed after regulation.Realize the optimal control of air conditioner in machine room, make up the prior art control when machine room low-load and lack
Fall into, when machine room duty factor is relatively low, runs one and compress and adjusted, by converter, compressor rotary speed is regulated, empty
Adjust the less cold of output, to reach cold and the balance of heat in machine room, reduce the start-stop time of compressor, reduce compression
The operation energy consumption of machine, so that the operation of air-conditioning is more energy efficient.Apply the cold regulation of air-conditioning after this technology wider, efficient solution
The problem that computer room temperature of having determined fluctuation is excessive, decreases the start-stop time of compressor, and energy-saving effect is more excellent simultaneously.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of air conditioning control method based on pid algorithm of the present invention.
Fig. 2 is the theory structure schematic diagram of system of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention further describes.Should be appreciated that specific embodiment described herein is used only for explaining the present invention, and need not
In limiting the present invention.
Defect present in and above-mentioned prior art high for air conditioner in machine room energy consumption, the present invention proposes a kind of novel
Control method and control system.The described method and system that the present invention provides are applicable to transformation and the new room of old air conditioner in machine room
The control system of air-conditioning, by every compressor is separately configured converter, configures a speed regulator to indoor fan, by adopting
The wind pushing temperature of air-conditioning, return air temperature and humidity in collection machine room, the controller built-in by controlling equipment, calculate optimum output frequency
Rate, controls compressor and the rotating speed of indoor fan, thus realizes the regulation of air-conditioning cold flow.
The invention provides a kind of air conditioning control method based on pid algorithm, such as Fig. 1, comprise the following steps:
The wind pushing temperature of air-conditioning, return air temperature and humidity in S1, collection machine room.
Use wind pushing temperature sensor, return air temperature sensor and the return air humidity sensor being arranged in Air Conditioning Facilities
Respectively the wind pushing temperature in Air Conditioning Facilities, return air temperature and humidity are acquired, and are sent to the data collected control
Device.
S2, according to described wind pushing temperature, return air temperature and default computer room temperature, control the number that air-conditioning inner compressor starts
With the time of startup.
In order to preferably be controlled air conditioning system, this step middle controller is compressed machine according to the data received
The number started and the calculating of the time of startup, concrete, include according to the step that the data received carry out calculating:
S21, when meeting condition T2 > T+k1 time, and compressor-free run time, then start the first compressor；
S22, when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and keeps the first Preset Time
After TIME1, then start the second compressor；
S23, when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is minima, then keep second
After preset time T IME2, then stop the second compressor or the operation of the first compressor；
S24, when meeting condition T2, < during T-k4, and the rotating speed of the first compressor of being currently running or the second compressor is minimum
Value, and after keeping the 3rd preset time T IME3, then stop all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
S3, utilize increment type PID algorithm, according to the temperature approach between described wind pushing temperature and return air temperature and default machine room
Temperature, calculates the optimum output frequency of compressor；Turn according to the optimum of the optimum output frequency regulation blower fan of compressor simultaneously
Speed.
Being calculated by equation below one of described increment type PID algorithm:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature, and described Kp, Ki and Kd are constant.
Described step S3 also includes:
S34, rotating speed according to the difference regulation compressor of return air temperature T2 and default computer room temperature T, as T2 > T time, increase frequency
Rate, on the contrary then reduce frequency.
Described step S1 also includes:
Step S311, increment type PID algorithm and adaptive algorithm are combined, calculated the optimum of compressor by equation below two
Output frequency:
△uk =△uk(1+ Kx)；
Kx=(preset value-value of feedback)/preset value × 100%；When Kx < when 10%, △ uk =△uk；As Kx >=10% time, △ uk
=△uk(1+ Kx)；
Wherein, described value of feedback is the return air temperature of air-conditioning, and described preset value is for presetting return air temperature.
This step also includes the content being controlled the rotating speed of blower fan, specific as follows:
First, the synchronization of the rotating speed of blower fan and compressor is arranged, then according to wind pushing temperature, return air humidity, preset the
The rotating speed of blower fan is adjusted by one protection value, default second protection value, default 3rd protection value and the 4th protection value；If air-supply
Temperature is less than presetting the first protection value, then the rotating speed controlling blower fan cannot be less than presetting the second protection value；If return air humidity is more than
3rd protection value, then control rotation speed of fan and cannot be greater than the 4th protection value, thus the wind speed avoiding blower fan is excessive, causes wind
The damage of machine, it also avoid owing to the wind speed of blower fan is too small simultaneously, and its caused can not realize its dehumidification function.
S4, control compressor carry out cold output with described optimum output frequency and control blower fan turns with described optimized rotating speed
Dynamic.
After the optimum output frequency of the compressor calculated in above-mentioned steps and the rotating speed of blower fan, according to the number calculated
It is controlled according to compressor and blower fan.
Said method is described further by method when being embodied as with method provided by the present invention below.
In the specific implementation, first gather the return air temperature of Air Conditioning Facilities, wind pushing temperature and humidity, and to Air Conditioning Facilities
Temperature pre-sets, by the wind pushing temperature arriving Real-time Collection and return air temperature with default computer room temperature to compressor
Optimum output frequency calculates.
Concrete, before calculating the optimum output frequency of compressor, first startup number and compressor to compressor open
The dynamic time calculates, and its step is as follows:
When meeting condition T2 > T+k1 time, and compressor-free run time, start the first compressor, now air-conditioning is single compressor
Refrigeration；Owing to now machine room duty factor is relatively low, if then start a compressor carry out refrigeration just can meet needs.
When meeting condition T2 > T+k2 time, and after the rotating speed of the first compressor is maximum, and retention time TIME1, start
Second compressor, is now two compressor refrigeration in Air Conditioning Facilities；
< during T-k3, and after the rotating speed of two compressors is minima, and retention time TIME2, one is stopped when meeting condition T2
Compressor, now air-conditioning is single compressor refrigeration；
When meeting condition T2, < during T-k4, and after the rotating speed of compressor is minima, and retention time TIME3, all compressors stop
Only running, now air-conditioning does not freezes.
Above, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is constant, and no more than 2.TIME1、TIME2、TIME3
Value be constant, general value 5 minutes.
Next the rotating speed aligning compressor operationally calculates, according to return air temperature T2 and default computer room temperature
T difference regulation compressor rotating speed, as T2 > T time, increase frequency, otherwise then reduce frequency.According to default computer room temperature T with
The difference of return air temperature T2, utilizes increment type PID algorithm and adaptive algorithm, calculates the optimum output frequency of compressor,
Its algorithm is as follows
△ uk=uk-uk-1=Kp × △ ek+Ki × ek+ Kd × [△ ek-△ ek-1] formula (1)
Wherein: ek=T-T2；△ ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Kp: proportionality coefficient；Ki: integral coefficient；Kd: differential coefficient；Described Kp, Ki and Kd are constant, test through laboratory,
Value is Kp=120, and when Ki=40, Kd=30, this control method is more excellent to the regulating effect of temperature, it is possible to according to practical situation
Do little correction, to reach optimal control results.
In order to make pid algorithm regulation more quickly respond, meet system requirements, substantially increase in the regulation of original pid algorithm
Adding parameter adaptive COEFFICIENT K x, its algorithm is as follows:
△ uk=△ uk (1+ Kx) formula (2)
Wherein: Kx=(setting value-value of feedback)/setting value × 100%；When Kx < when 10%, △ uk=△ uk；Work as Kx >=10%
Time, △ uk=△ uk (1+ Kx)；
The technology can quickly regulate the cold output of air-conditioning, is allowed to be rapidly achieved balance with the heat load of machine room information technoloy equipment,
Fast response time.Simultaneously as regulation and the regulation of two compressors of single compressor can be realized, the cold output of air-conditioning
Scope is bigger (30%～100%), can meet the actual application of heavy load machine room and little load machine room.
The method of the invention realizes air-conditioning under each load, realizes air-conditioning cold flow output by start/stop of compressor mode
Regulation, coordinates the rotational speed regulation technology of Compressors and Fans, can realize the step-less adjustment function of 30%～100% output cold.
It follows that the present invention arranges independent speed regulator for blower fan, and individually set the maximum speed of blower fan with minimum
Rotating speed, the actual running speed N of blower fan and the synchronization regulation of compressor, be inserted simultaneously into the relay protective scheme of machine room operating mode,
Safer and the energy-saving run with guarantee air conditioner in machine room, its control method is as follows:
If the wind pushing temperature of air-conditioning is less than the first protection value k1, i.e. < during k1, the rotating speed of blower fan cannot be less than the second protection value to T1
k2；
If calculating rotating speed N to be less than the second protection value k2, then control the output speed N=k2 of blower fan,
If calculate rotating speed N more than or equal to the second protection value k2, the output speed N=k2 of blower fan.
If the return air humidity of air-conditioning is more than the 3rd protection value k3, rotation speed of fan cannot be greater than the 4th protection value value k4；
If calculating rotating speed N less than protection value k4, the output speed N=N of blower fan,
If calculate rotating speed N more than or equal to protection value k4, the output speed N=k4 of blower fan；Preferably, described k4 is dehumidifying
Air speed value.
The technology realizes the independence of rotation speed of fan and controls, and makes air-conditioning in normal process of refrigerastion, can be machine room IT
Equipment provides suitable inlet temperature and humidity, reduces the fault that information technoloy equipment causes because of external environment condition, ensures its safe operation.
Based on the above method, present invention also offers a kind of air-conditioner control system based on pid algorithm, such as Fig. 2
Shown in, described system includes: multiple compressors and each compressor set up connect one to one multiple converters, blower fan and
All blower fans all set up the shared speed regulator of connection, wind pushing temperature sensor, return air temperature sensor, return air humidity sensor and
Controller；
The air-supply temperature of air-conditioning in described wind pushing temperature sensor, return air temperature sensor and return air humidity sensor collection machine room
Degree, return air temperature and humidity, be sent to controller；
Described controller includes: starts number and time control module, optimal data computing module and controls to run module；
Described startup number and time control module, for according to described wind pushing temperature, return air temperature and default computer room temperature, control
The number that air-conditioning inner compressor processed starts and the time of startup；
Described optimal data computing module, is used for utilizing increment type PID algorithm, according between described wind pushing temperature and return air temperature
Temperature approach and default computer room temperature, calculate the optimum output frequency of compressor, simultaneously according to the optimum output frequency of compressor
The optimized rotating speed of rate regulation blower fan；
Control to run module, be used for controlling compressor and carry out cold output with described optimum output frequency and control blower fan with described
Optimized rotating speed rotates.
Described startup number and time control module include:
First condition identifying unit, for when meeting condition T2 > T+k1 time, and when compressor-free runs, then start the first compression
Machine；
Second condition identifying unit, for when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and protects
After holding the first preset time T IME1, start the second compressor；
Third condition identifying unit, for when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is
Minima, then after keeping the second preset time T IME2, then stop the second compressor or the operation of the first compressor；
Fourth condition identifying unit, for when meeting condition T2, < during T-k4, and the first compressor or second being currently running is pressed
The rotating speed of contracting machine is minima, and after keeping the 3rd preset time T IME3, then stops all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
Being calculated by equation below one of described increment type PID algorithm:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature, and described Kp, Ki and Kd are constant.
Described optimal data computing module, is additionally operable to the difference regulation pressure according to return air temperature T2 and default computer room temperature T
The rotating speed of contracting machine, as T2 > T time, increase frequency, otherwise then reduce frequency.
Described optimal data computing module, is additionally operable to increment type PID algorithm and adaptive algorithm be combined, by as follows
Formula two calculates the optimum output frequency of compressor:
△uk =△uk(1+ Kx)；
Kx=| preset value-value of feedback |/preset value × 100%；When Kx < when 10%, △ uk =△uk；
As Kx >=10% time, △ uk =△uk(1+ Kx)；
Wherein, described value of feedback is the return air temperature of air-conditioning, and described preset value is for presetting return air temperature.
The control equipment that the present invention relates to, control object is air conditioner in machine room, and its internal capital equipment includes converter, speed governing
Device, wind pushing temperature sensor, return air temperature sensor, return air humidity sensor and controller, according to the compressor of air conditioner in machine room
Quantity configures converter with man-to-man principle, and indoor fan configures single speed regulator, and gathers the wind pushing temperature of machine room, returns
Air temperature and return air humidity, in conjunction with the data collected, and default computer room temperature value, calculate the temperature difference, controller calculate
Go out the output frequency of coupling, control the rotating speed of compressor and indoor fan, thus complete the control to air-conditioning cold flow output.
Beneficial effect, the invention provides a kind of air conditioning control method based on pid algorithm and system thereof, passes through harvester
The wind pushing temperature of air-conditioning, return air temperature and humidity in room；According to described wind pushing temperature, return air temperature and default computer room temperature, control
The number that air-conditioning inner compressor processed starts and the time of startup；Utilize increment type PID algorithm, according to described wind pushing temperature and return air temperature
Temperature approach between degree and default computer room temperature, calculate the optimum output frequency of compressor；Simultaneously according to the optimum of compressor
The optimized rotating speed of output frequency regulation blower fan；Control compressor carry out cold output with described optimum output frequency and control blower fan
With the rotational speed after regulation.In the method for the invention and system, the cold regulation of air-conditioning is wider, efficiently solves machine
The problem that room temperature fluctuation is excessive, decreases the start-stop time of compressor, and energy-saving effect is more excellent.
It is understood that for those of ordinary skills, can be according to technical scheme and send out
Bright design in addition equivalent or change, and all these change or replace the guarantor that all should belong to appended claims of the invention
Protect scope.
Claims (10)
1. an air conditioning control method based on pid algorithm, it is characterised in that comprise the following steps:
The wind pushing temperature of air-conditioning, return air temperature and humidity in step A, collection machine room；
Step B, according to described wind pushing temperature, return air temperature and default computer room temperature, control the number that air-conditioning inner compressor starts
With the time of startup；
Step C, utilize increment type PID algorithm, according to the temperature approach between described wind pushing temperature and return air temperature and default machine room
Temperature, calculates the optimum output frequency of compressor；Optimum output frequency according to compressor regulates the rotating speed of blower fan simultaneously；
Step D, control compressor carry out cold output with described optimum output frequency and control blower fan turns with the rotating speed after regulation
Dynamic.
Air conditioning control method based on pid algorithm the most according to claim 1, it is characterised in that described step B includes:
Step B1, when meeting condition T2 > T+k1 time, and compressor-free run time, then start the first compressor；
Step B2, when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and keeps the first Preset Time
After TIME1, then start the second compressor；
Step B3, when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is minima, then keep
After second preset time T IME2, then stop the second compressor or the operation of the first compressor；
Step B4, when meeting condition T2, < during T-k4, and the rotating speed of the first compressor of being currently running or the second compressor is for
Little value, and after keeping the 3rd preset time T IME3, then stop all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
Air conditioning control method based on pid algorithm the most according to claim 1, it is characterised in that described in described step C
Increment type PID algorithm is calculated by equation below one:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature, and described Kp, Ki and Kd are constant.
Air conditioning control method based on pid algorithm the most according to claim 3, it is characterised in that also wrap in described step C
Include:
Step C1, increment type PID algorithm and adaptive algorithm being combined, the optimum being calculated compressor by equation below two is defeated
Go out frequency:
△uk =△uk(1+ Kx)；
Wherein: Kx=| preset value-value of feedback |/preset value × 100%；When Kx < when 10%, △ uk =△uk；Work as Kx >=10%
Time, △ uk =△uk(1+ Kx)；Described value of feedback is the return air temperature of air-conditioning, and described is compression set in advance with preset value
Machine output frequency.
Air conditioning control method based on pid algorithm the most according to claim 4, it is characterised in that described step C is also wrapped
Include:
Step C2, the synchronization of the rotating speed of blower fan Yu compressor is arranged after, according to wind pushing temperature, return air humidity, preset the
The rotating speed of blower fan is adjusted by one protection value, default second protection value, default 3rd protection value and the 4th protection value；
If wind pushing temperature is less than presetting the first protection value, then the rotating speed controlling blower fan cannot be less than presetting the second protection value；If returning
Rheumatism degree is more than the 3rd protection value, then control rotation speed of fan and cannot be greater than the 4th protection value.
6. an air-conditioner control system based on pid algorithm, it is characterised in that including: multiple compressors are built with each compressor
Shared speed regulator, the wind pushing temperature sensing being connected all set up by vertical multiple converters of connecting one to one, blower fan with all blower fans
Device, return air temperature sensor, return air humidity sensor and controller；
The air-supply temperature of air-conditioning in described wind pushing temperature sensor, return air temperature sensor and return air humidity sensor collection machine room
Degree, return air temperature and humidity, be sent to controller；
Described controller includes: starts number and time control module, optimal data computing module and controls to run module；
Described startup number and time control module, for according to described wind pushing temperature, return air temperature and default computer room temperature, control
The number that air-conditioning inner compressor processed starts and the time of startup；
Described optimal data computing module, is used for utilizing increment type PID algorithm, according between described wind pushing temperature and return air temperature
Temperature approach and default computer room temperature, calculate the optimum output frequency of compressor, simultaneously according to the optimum output frequency of compressor
The rotating speed of rate regulation blower fan；
Control to run module, be used for controlling compressor and carry out cold output with described optimum output frequency and control blower fan with regulation
After rotational speed.
Air-conditioner control system based on pid algorithm the most according to claim 6, it is characterised in that described startup number and
Time control module includes:
First condition identifying unit, for when meeting condition T2 > T+k1 time, and when compressor-free runs, then start the first compression
Machine；
Second condition identifying unit, for when meeting condition T2 > T+k2 time, and the rotating speed of the first compressor is maximum, and protects
After holding the first preset time T IME1, start the second compressor；
Third condition identifying unit, for when meeting condition T2, < during T-k3, and the rotating speed of the first compressor and the second compressor is
Minima, then after keeping the second preset time T IME2, then stop the second compressor or the operation of the first compressor；
Fourth condition identifying unit, for when meeting condition T2, < during T-k4, and the first compressor or second being currently running is pressed
The rotating speed of contracting machine is minima, and after keeping the 3rd preset time T IME3, then stops all compressor operatings；
Wherein, described T2 is return air temperature, and T is for presetting computer room temperature, k2 > k1, k4 > k3, and the value of k1, k2, k3 and k4 is not
Constant more than 2；The value of described TIME1, TIME2 and TIME3 is constant.
Air-conditioner control system based on pid algorithm the most according to claim 6, it is characterised in that described increment type PID is calculated
Being calculated by equation below one of method:
△uk= uk-uk-1= Kp×△ek+ Ki×ek+ Kd×[△ek-△ek-1]；
ek=T-T2；△ek=ek-ek-1, △ ek-1=ek-1-ek-2；
Wherein, T is for presetting computer room temperature, and T2 is return air temperature, and described Kp, Ki and Kd are constant.
Air-conditioner control system based on pid algorithm the most according to claim 8, it is characterised in that described optimal data meter
Calculate module, be additionally operable to combine increment type PID algorithm and adaptive algorithm, calculated the optimum of compressor by equation below two
Output frequency:
△uk =△uk(1+Kx)；
Kx=(preset value-value of feedback)/preset value × 100%；When Kx < when 10%, △ uk =△uk；
As Kx >=10% time, △ uk =△uk(1+ Kx)；
Wherein, described value of feedback is the return air temperature of air-conditioning, and described preset value is for presetting return air temperature.
Air-conditioner control system based on pid algorithm the most according to claim 8, it is characterised in that described optimal data meter
Calculate module, after being additionally operable to arrange the synchronization of the rotating speed of blower fan Yu compressor, according to wind pushing temperature, return air humidity, preset
The rotating speed of blower fan is adjusted by the first protection value, default second protection value, default 3rd protection value and the 4th protection value；
If wind pushing temperature is less than presetting the first protection value, then the rotating speed controlling blower fan cannot be less than presetting the second protection value；If returning
Rheumatism degree is more than the 3rd protection value, then control rotation speed of fan and cannot be greater than the 4th protection value.
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| CN116045497A (en) * | 2023-03-06 | 2023-05-02 | 珠海格力电器股份有限公司 | Self-adaptive control method for portable air conditioner, portable air conditioner and computer readable storage medium |
| CN116045497B (en) * | 2023-03-06 | 2024-08-16 | 珠海格力电器股份有限公司 | Self-adaptive control method for portable air conditioner, portable air conditioner and computer readable storage medium |
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