CN109780694A - A kind of air conditioner low-temperature heating control method - Google Patents
A kind of air conditioner low-temperature heating control method Download PDFInfo
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- CN109780694A CN109780694A CN201711109244.3A CN201711109244A CN109780694A CN 109780694 A CN109780694 A CN 109780694A CN 201711109244 A CN201711109244 A CN 201711109244A CN 109780694 A CN109780694 A CN 109780694A
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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
Abstract
The invention discloses a kind of air conditioner low-temperature heating control methods, belong to low temperature control technology field.The temperature sensor of detectable air conditioner operating condition is set in air conditioner, the temperature sensor is electrically connected with the controller for being equipped with temperature reference value, and controller controls air conditioner and enters the low-temperature heating pattern for reducing air circulation according to sensor detection signal and temperature reference value comparison result.When into low-temperature heating pattern, controller output control signal, relay switch or controlled silicon conducting angle are controlled to adjust indoor fan motor and be set as low speed operation, the starting of auxiliary electro-heat device is also controlled by relay, lateral aerofoil is adjusted by wind direction motor and uses air port in position directly down, control lateral air outlet closing, reduces indoor circulation air quantity, this air conditioner can significantly improve supply air temperature when heating, so as to improve low-temperature heating effect, make people feel comfortable.
Description
Technical field
The invention belongs to air regulator fields, are related to a kind of air conditioner low-temperature heating control method, in more detail
Say it is the air conditioner that the operating parameter of air conditioner is automatically adjusted about the operating condition according to locating for air conditioner.
Background technique
The refrigeration system of existing heat-pump-type air conditioner by compressor, four-way reversing valve, condenser, throttle part and
Evaporator composition；Electric-control system includes the components such as controller, sensor, control valve, auxiliary electro-heat device and fan motor.Usually
When heating operation, air conditioner heats principle according to heat pump, and heat is transferred to interior from outdoor by compressor work.Compressor
By the side heat exchanger sent to the room condensation of the refrigerant of high temperature and pressure, indoor fan by refrigerant condense released heat with
Hot wind is sent to interior.Outdoor heat exchanger evaporation is flowed by throttle part by the refrigerant of indoor side heat exchanger, by
Outside fan arranges cooling capacity to outdoor air.Last refrigerant returns to compressor from outdoor heat exchanger, completes a system
Thermal cycle.
GB/T7725 room type air regulator provides according to national standards, the declared working condition of heat pump air conditioner heating operation
It is 7 DEG C of outside temperature, 19 DEG C of indoor temperature.Its heating efficiency and heating capacity reduce with outdoor temperature and are declined.In general, room
When outer temperature is lower than 5 DEG C, the heating effect of heat pump air conditioner is poor, needs to heat using other methods.
When environment temperature is very low, the outside inlet air temperature and indoor inlet air temperature of heat pump air conditioner are all lower, room
Inside leaving air temp also decreases.It is still being heated although indoor leaving air temp is higher than room temperature, due to inlet air temperature
It is low, therefore leaving air temp is still likely lower than the shell temperature of people, makes one to feel that air-conditioning does not heat, blows a cold wind over.This Space-Time Modulation
Heat is relatively low, and room temperature rises slowly, also makes one to feel that air-conditioning heating effect is poor.
Summary of the invention
It is an object of the invention to: a kind of air conditioner low-temperature heating control method, more specifically basis are provided
Operating condition locating for air conditioner automatically controls the operation of indoor fan motor low speed to improve the air conditioner of low-temperature heating effect.
The technical solution adopted by the invention is as follows:
A kind of air conditioner low-temperature heating control method, in air-conditioning heating operation, method includes the following steps:
A): temperature inductor detects the temperature of its position；
B): the temperature signal that temperature inductor is examined and determine is compared by controller with the temperature reference value of setting, obtains temperature
It is poor to spend；
C): when the temperature difference in step b) is negative value, air conditioner enters low-temperature heating pattern；
D): fan motor is set as low speed operation on the inside of controller control room.
In step c), the process of control heating and/or cooling includes following step when air conditioner enters low-temperature heating pattern
It is rapid:
C01: temperature/time graph is preset；
C02: the measured temperature at controlled device current time is obtained, and is calculated currently according to the temperature/time graph
The temperature target at moment；
C03: PID arithmetic is carried out according to the measured temperature at current time and the temperature target；
C04: it is exported according to PID arithmetic result regulation power, completes a power regulation；
C05: repeating step S02 to step S04, until completing the temperature/time graph.
01 step of step c the following steps are included:
Anti- overshoot temperature is being set, and the temperature/time graph, which is arranged, makes the anti-overshoot temperature to desired temperature
Between temperature range lifting/lowering temperature rate be less than initial temperature to it is described it is anti-overshoot temperature between temperature range lifting/lowering
Warm rate.
In step d), controller also controls the starting of auxiliary electro-heat device by relay.
In step d), controller also passes through the lateral aerofoil of wind direction motor adjusting and uses air port in position directly down.
In step d), controller also passes through the closing of wind direction motor control lateral air outlet.
In step d), fan motor low speed run when wind speed adjust the following steps are included:
D01: the air speed value at the measuring wind speed unit detection wind passage mouth of fan；
D02: air speed value is compared with rated wind speed value, and the main control unit of fan issues revolving speed revision directive；
D03: the motor control unit of fan receives revolving speed revision directive, carries out drive control to fan motor；
D04: the rotating-speed tracking unit of fan issues rotation speed change feedback signal, feeds back to the motor control unit of fan；
D05: the motor control unit of fan receives speed feedback signal, controls again the revolving speed of fan motor；
D06: repeat the above steps d01 to d05, progress repeatedly circulation amendment, until the air speed value of the blower is pre- equal to this
If rated wind speed value, and maintain rated wind speed value.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, in the present invention, the present invention detects operating condition locating for air conditioner by temperature sensor, automatically adjusts the fortune of air conditioner
Row parameter, makes air conditioner enter low-temperature heating pattern, to control indoor fan motor low-speed running, starts auxiliary electro-heat device
Part, the lateral aerofoil of adjusting use air port and are in position directly down or control lateral air outlet closing to reduce entire air conditioner
Air circulation, to improve the supply air temperature of air conditioner, hence it is evident that improve low-temperature heating effect, make people feel comfortable.In air conditioner
Heating, cooling process is controlled using servo antrol mode during control heating and/or cooling when into low-temperature heating pattern,
It can be fluctuated in lesser range according to designed lifting/lowering temperature curve at the uniform velocity lifting/lowering temperature, heating power, reduce because
For temperature error caused by big inertia, the accuracy of temperature control is improved.When fan motor low speed is run, motor control unit can be with
The revolving speed revision directive for receiving main control unit sending carries out drive control to motor according to the instruction.Rotating-speed tracking unit can
To issue rotation speed change feedback signal to motor control unit, revolving speed change is issued when motor control unit receives rotating-speed tracking unit
When changing feedback signal, the revolving speed of motor is controlled again, and repeatedly circulation amendment, reaches and maintain rated wind speed value.
Main control unit is somebody's turn to do again using air speed value caused by the blower as feedback control parameters until the air speed value of the blower is equal at this time
Until preset air speed value, thus using this cyclic process can it is unlimited number of adjustment blower wind speed, until settling position.This
In invention, ambient wind velocity is detected, then the effect exactly generated by direct detection blower fan controls the output of blower in turn.
Compared with original control program, with " fruit " influence " because ", causality is definitely.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is carried out below further
It is described in detail.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
A kind of air conditioner low-temperature heating control method, the air conditioner include by compressor, four-way reversing valve, room
The refrigeration system of inside heat exchanger, throttle part and outdoor heat exchanger composition, by controller, control valve, auxiliary electro-heat
The electric-control system of the components such as device and inside and outside fan motor composition, on the basis of existing air conditioner structure, in air conditioner
Temperature sensor is added, temperature sensor is mounted on the tube temperature signal of the air inlet measurement position of indoor heat exchanger,
And signal is passed into controller；A corresponding temperature reference value is set on controller simultaneously, by controller to detection temperature
Degree is compared with fiducial temperature, is judged whether to enter low-temperature heating operational mode according to the difference of the two, if detection temperature is low
In the temperature reference value of setting, i.e., when difference is negative value, then enter low-temperature heating operational mode.That is control indoor fan motor is low
Speed operating, starting auxiliary electro-heat device, the lateral aerofoil of adjusting use air port and are in position directly down or control lateral air outlet
It closes to reduce the air circulation of entire air conditioner, to improve the supply air temperature of air conditioner.
For air conditioner in heating operation, four-way reversing valve is in the conductive state.The high-temperature high-pressure refrigerant of compressor discharge
Gas flows into exothermic condensation in indoor heat exchanger through four-way reversing valve, enters in outdoor heat exchanger after capillary throttles and steams
Hair finally returns to compressor through four-way reversing valve again, completes heat pump heating circulation.Controller issues wind in control signal enabling room
Motor is fanned, indoor fan rotation is driven, the room air for entering the room side heat exchanger is made to be heated after-blow to interior.Meanwhile room
External fan motor drives outdoor fan, and outdoor heat exchanger is made to absorb heat from outdoor air.When controller receives temperature
After the tube temperature signal that sensor is measured is compared with the temperature reference value of setting, temperature reference of the indoor tube temperature lower than setting
Value makes indoor fan motor by control relay switch or controlled silicon conducting angle at this point, controller issues control signal
It is run into low speed, indoor fan is driven to slowly run, into low-temperature heating pattern, air circulation drop on the inside of such air conditioner chamber
It is low, supply air temperature in air conditioner chamber can be improved, improve air conditioner heat-production effect, make people feel comfortable.Also, temperature sensor
Settable different location in systems, so that different temperature values is determined, environment temperature, outdoor heat exchanger such as outside
Tube temperature, indoor inlet air temperature, indoor heat exchanger tube temperature etc., in this way, also setting out corresponding temperature reference value on controller
To be compared.Moreover, air conditioner can be equipped with above-mentioned two or more temperature sensors, as long as one of temperature passes
When the detection signal of sensor is lower than the temperature reference value set, or when the detection signal of the two or multiple temperature sensors is all low
When the temperature reference value of setting, into low-temperature heating operational mode.When the temperature signal that temperature sensor detects is higher than control
When the temperature reference value of device setting processed, controller operates normally fan motor on the inside of priming chamber, into normal heating mode.
For being equipped with the air conditioner of auxiliary electro-heat device, the relay electricity of controller and control auxiliary electro-heat device starting
Connection.When into low-temperature heating pattern, start auxiliary electro-heat device.Controller also with adjust lateral aerofoil and/or lateral outlet air
Mouthful the electrical connection of wind direction motor, when into low-temperature heating mode, wind direction motor electricity adjusts transverse direction aerofoil by mechanical transmission structure
So that air outlet is in position directly down or close lateral air outlet, the air circulation of air conditioner is further decreased, to improve
The supply air temperature of air conditioner, makes people feel comfortable.
In step c), the process of control heating and/or cooling includes following step when air conditioner enters low-temperature heating pattern
It is rapid:
C01: temperature/time graph is preset；
C02: the measured temperature at controlled device current time is obtained, and is calculated currently according to above-mentioned temperature/time graph
The temperature target at moment；
C03: PID arithmetic is carried out according to the measured temperature at current time and temperature target；
C04: it is exported according to PID arithmetic result regulation power, completes a power regulation；
C05: repeating step c02 to step c04, until completing above-mentioned temperature/time graph.
Pid algorithm is improved in the present invention, control mode is changed to servo antrol mode, using using method of the invention
Controller can fluctuate, subtract in lesser range according to designed lifting/lowering temperature curve at the uniform velocity lifting/lowering temperature, heating power
Lack because of temperature error caused by big inertia.
PID temperature control method of the invention can be realized by DCS system, at this point, can the method according to the invention system
Make the pid control module that can be called directly in DCS software, as PID controller, is fed back, can be formed by introducing
The automatic control to heating, cooling, insulating process is realized in close loop control circuit.
In order to reduce influence of the electromagnetic interference to measured temperature, before using measured temperature, it is carried out pre-
It handles, specifically being handled as follows the measured temperature for reading controlled device in step S02:
Measured temperature is read out, is sampled, pretreatment is filtered to sampled signal and is calculated, and calculated result is made
For the measured temperature at current time.
In order to mitigate occupancy and mitigation computational burden of the filtering calculating process to memory of measured temperature, pre- place is filtered
Reason can choose one of sliding average filtering processing, median filter process, limit filtration processing and low-pass filtering treatment:
(1) sliding average value filtering
Sliding average method is N number of sampled data to be regarded as a queue, is fixed as N to the length of column, every to carry out once
Sampled result is put into tail of the queue by new sampling, and throws away a data of original head of the queue, have always in the queue in this way it is N number of " most
Data newly ".When calculating filter value, as long as N number of data in queue are averaged, so that it may obtain new filter value.
Sliding average method has good inhibiting effect to PERIODIC INTERFERENCE, and smoothness is high, and sensitivity is low；But to accidentally out
The inhibiting effect of existing pulse feature interference is poor, is not easy to eliminate the deviation of the sampled value due to caused by impulse disturbances.Therefore he is uncomfortable
For the more serious occasion of impulse disturbances, and it is suitable for higher-order of oscillation system.By observing average defeated of different N value lower sliders
Response not only to lack holding time, but also can reach best filter effect to choose N value out.
N number of data can also be given to bigger weight multiplied by different weights, such as newer data, data can be improved
Sensitivity.
In the more serious occasion of impulse disturbances, according to general mean value method, then interfere " average " to calculating knot
In fruit, therefore it is not easy to eliminate the sampled value deviation due to caused by impulse disturbances.First N number of data can be compared, remove it
In maximum value and minimum value, then calculate the arithmetic mean of instantaneous value of remaining N-2 data.
(2) median filtering
Median filtering is to a certain measured parameter continuous sampling n times (General N takes odd number), then n times sampled value from small
It to big, or is lined up from big to small, then takes in-between value as this sampled value.
Median filtering for remove caused by accidentalia fluctuation or sampler it is unstable and caused by caused by error
Impulse disturbances are more effective.
(3) limit filtration
Limit filtration subtracts each other sampled value adjacent twice, finds out its increment, and increment is with absolute value representation, then and twice
The maximum difference Δ Y that sampling allows is compared, if being less than or equal to Δ Y, takes this sampled value；If more than Δ Y, then still take
Last time sampled value is as this sampled value.Threshold value should be determined by the actual conditions of controlled device.
(4) low-pass filtering
The second-order low-pass filter of following transmission function can be used:
<math><mfrac><mn>1</mn><mrow><mn>1</mn><mo>+</mo><mi>&tau；s</mi><mo>+
</mo><mn>0.5</mn><mi>&tau；</mi><msup><mi>s</mi><mn>2</mn></msup></mrow></
mfrac></math>
Wherein, s is complex variable.
Low-pass filter can remove High-frequency Interference, have preferable effect to the signal containing High-frequency Interference.
In use process, different filtering modes can be selected according to the actual situation.The selection of above-mentioned filtering mode is also
Select for the characteristics of temperature object: measured temperature generally changes relatively slowly, can be to the sampled data several times in a period of time
The operation measured value that obtains that treated is carried out, meanwhile, temperature signal, the temperature signal acquired in particular by compensating wire mode
It is highly susceptible to electromagnetic interference, temperature value is made to generate the higher-order of oscillation, it can be preferably warm using above several pretreatment modes
Degree measured value and actual temperature are consistent.
In step d), fan motor low speed run when wind speed adjust the following steps are included:
Step d01: the air speed value at wind passage mouth is measured with the air velocity transducer being mounted at ducting outlet end, and will be measured
Signal become digital signal by the conversion of A/D converter, and then pass to main control unit.
Step d02: measured air speed value is compared with rated wind speed value, obtains a wind speed difference signal, master control
Unit processed issues revolving speed revision directive according to wind speed difference signal.
Step d03: motor control unit receives the revolving speed revision directive that main control unit is sent, and is referred to according to revolving speed amendment
It enables and drive control is carried out to motor.
Step d04: rotating-speed tracking unit issues rotation speed change feedback signal, feedback according to the rotation speed change situation of motor
To motor control unit.
Step d05: motor control unit receives speed feedback signal, controls again the revolving speed of motor.
Step d06: repeat the above steps d01 to d05, carries out repeatedly circulation amendment, until the air speed value of the blower is equal to
The preset rated wind speed value, and maintain rated wind speed value.
The both ends of blower are connected to the air-blower control unit that wind speed is control target, to control the air speed value of blower.
Blower includes at least a fan, a motor and an air duct.Wherein air duct includes an input end and a ducting outlet end, wind
Fan is mounted on the input end in air duct, and He Yitai motor is connected, and motor is mounted on the side in air duct, and the motor is by controlling itself
Revolving speed controls the revolving speed of fan.The ducting outlet end in the air duct is used to the basicly stable of controlled wind speed.
In the present embodiment, the air-blower control unit include at least four units: measuring wind speed unit, main control unit,
Motor control unit and rotating-speed tracking unit.
Measuring wind speed unit is to measure the wind speed at ducting outlet end.In this embodiment, measuring wind speed unit is by wind
Fast sensor and A/D converter composition.Air velocity transducer is mounted at ducting outlet end, is a kind of flowing velocity change by air
Amount is converted into the device of the output signal of certain corresponding relationship.The wind speed size of infield can be continuously monitored, it can be to institute
The wind speed for locating air duct carries out real-time display.The signal of air velocity transducer measurement is converted into digital signal, and handle by A/D converter
The digital signal sends the processing application that comparing unit carries out next step to.
Main control unit front end is connected with measuring wind speed unit, and rear end is connected with motor control unit.The unit is pre-
It is first provided with rated wind speed value, when work, wind speed measuring unit is measured and feeds back the air speed value come, with preset rated wind speed
Value is compared, and generates a wind speed difference signal, and main control unit calculates corresponding motor speed according to the wind speed difference signal
Difference signal, and issue a revolving speed revision directive.
Wherein motor speed difference signal is pre- according to wind speed difference-motor speed difference formula of a theoretical property or according to one
Wind speed difference and the motor speed difference corresponding curve diagram for first passing through test data sheet are calculated, calculate the wind by wind speed difference
Motor speed difference corresponding to speed difference value.
Wherein when calculating motor speed difference corresponding to the wind speed difference using wind speed difference-motor speed difference formula,
The calculation formula of application are as follows:
Δ n=K Δ Q
Wherein
Δ n: motor speed difference
Δ Q: wind speed difference
K: proportionality coefficient
It can be seen that motor speed difference and wind speed difference direct proportionality, proportionality coefficient K from the formula.So
And the structure of Proportional coefficient K and fan, shape, the quantity of blade etc. are related, are a test datas, but every kind of fan must be done
Experiment is to determine its corresponding coefficient.
Another method used when motor speed corresponding to calculation of wind speed value, i.e., using first passing through test data sheet in advance
Wind speed difference and motor speed difference corresponding curve diagram.However wind speed difference and motor speed corresponding to different air duct shapes
Difference corresponding curve diagram is different, that is to say, that a large amount of experiment will be done in advance for each blower, to determine wind
The corresponding relationship of speed difference value and motor speed difference, just it can be concluded that the corresponding curve diagram of wind speed difference and motor speed difference.
Motor control unit front end is connected with main control unit, and rear end is connected with motor and rotating-speed tracking unit, should
Unit sends control signal to motor, and receives the motor speed change feedback signal that rotating-speed tracking unit is fed back.First
The revolving speed revision directive for receiving main control unit sending carries out drive control to motor according to the instruction, when receiving rotating-speed tracking
When unit issues rotation speed change feedback signal, the revolving speed of motor is controlled again, and repeatedly circulation amendment, reaches and tie up
Hold rated wind speed value.
Rotating-speed tracking unit one end is connected with motor, and one end is connected with motor control unit, for the revolving speed motor
Change feedback signal back to motor control unit.
Claims (7)
1. a kind of air conditioner low-temperature heating control method, in air-conditioning heating operation, which is characterized in that this method include with
Lower step:
A): temperature inductor detects the temperature of its position；
B): the temperature signal that temperature inductor is examined and determine is compared by controller with the temperature reference value of setting, obtains temperature difference；
C): when the temperature difference in step b) is negative value, air conditioner enters low-temperature heating pattern；
D): fan motor is set as low speed operation on the inside of controller control room.
2. a kind of air conditioner low-temperature heating control method according to claim 1, it is characterised in that: in step c),
The process of control heating and/or cooling when air conditioner enters low-temperature heating pattern the following steps are included:
C01: temperature/time graph is preset；
C02: the measured temperature at controlled device current time is obtained, and current time is calculated according to the temperature/time graph
Temperature target；
C03: PID arithmetic is carried out according to the measured temperature at current time and the temperature target；
C04: it is exported according to PID arithmetic result regulation power, completes a power regulation；
C05: repeating step S02 to step S04, until completing the temperature/time graph.
Step c01 step the following steps are included:
3. a kind of air conditioner low-temperature heating control method according to claim 2, it is characterised in that: set anti-overshoot
Temperature, and the lifting/lowering that the temperature/time graph makes the anti-overshoot temperature to the temperature range between desired temperature is set
Warm rate is less than the lifting/lowering temperature rate of initial temperature to the temperature range between the anti-overshoot temperature.
4. a kind of air conditioner low-temperature heating control method according to claim 1, it is characterised in that: in step d),
Controller also controls the starting of auxiliary electro-heat device by relay.
5. a kind of air conditioner low-temperature heating control method according to claim 1, it is characterised in that: in step d),
Controller also passes through the lateral aerofoil of wind direction motor adjusting and uses air port in position directly down.
6. a kind of air conditioner low-temperature heating control method according to claim 1, it is characterised in that: in step d),
Controller also passes through the closing of wind direction motor control lateral air outlet.
7. a kind of air conditioner low-temperature heating control method according to claim 1, it is characterised in that: in step d),
Fan motor low speed run when wind speed adjust the following steps are included:
D01: the air speed value at the measuring wind speed unit detection wind passage mouth of fan；
D02: air speed value is compared with rated wind speed value, and the main control unit of fan issues revolving speed revision directive；
D03: the motor control unit of fan receives revolving speed revision directive, carries out drive control to fan motor；
D04: the rotating-speed tracking unit of fan issues rotation speed change feedback signal, feeds back to the motor control unit of fan；
D05: the motor control unit of fan receives speed feedback signal, controls again the revolving speed of fan motor；
D06: repeat the above steps d01 to d05, progress repeatedly circulation amendment, until the air speed value of the blower is preset equal to this
Rated wind speed value, and maintain rated wind speed value.
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| CN201711109244.3A CN109780694A (en) | 2017-11-11 | 2017-11-11 | A kind of air conditioner low-temperature heating control method |
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| CN201711109244.3A CN109780694A (en) | 2017-11-11 | 2017-11-11 | A kind of air conditioner low-temperature heating control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247862A (en) * | 2022-07-21 | 2022-10-28 | 海信空调有限公司 | Operation control method for air conditioner and electric heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247862A (en) * | 2022-07-21 | 2022-10-28 | 海信空调有限公司 | Operation control method for air conditioner and electric heater |
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Application publication date: 20190521 |