CN106610088A - Frequency control method and device for variable-frequency air conditioner - Google Patents
Frequency control method and device for variable-frequency air conditioner Download PDFInfo
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- CN106610088A CN106610088A CN201611087718.4A CN201611087718A CN106610088A CN 106610088 A CN106610088 A CN 106610088A CN 201611087718 A CN201611087718 A CN 201611087718A CN 106610088 A CN106610088 A CN 106610088A
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
- F24F2120/12—Position of occupants
Abstract
The invention discloses a frequency control method and device for a variable-frequency air conditioner. The frequency control method for the variable-frequency air conditioner comprises the steps that the air conditioner operates in a refrigerating mode, and indoor temperature PID operation is conducted, so that a first frequency is obtained; the real-time distance between a target in the room where the air conditioner is located and the air conditioner is obtained, and the frequency corresponding to the real-time distance is determined and used as a second frequency; coil pipe temperature PID operation is conducted according to the difference between the real-time coil pipe temperature and a coil pipe target temperature, so that a third frequency is obtained, the coil pipe target temperature is determined according to the real-time humidity in the room, and when the real-time humidity is high, the coil pipe target temperature is low; if the real-time indoor environment temperature is not lower than a set comfortable temperature, the smaller one of the first frequency and the second frequency is used as the target frequency; and if the real-time indoor environment temperature is lower than the set comfortable temperature, the smaller one of the first frequency, the second frequency and the third frequency is used as the target frequency. By applying the frequency control method and device for the variable-frequency air conditioner, control over energy saving and comfort of the air conditioner can be achieved.
Description
Technical field
The invention belongs to air-conditioning technique field, is the air-conditioning for being related to adjust room air, more specifically specifically
Say, it is related to based on convertible frequency air-conditioner control method for frequency and control device.
Background technology
Air-conditioning summer can freeze, winter can heat, and can adjust indoor temperature and reach cool in summer and warm in winter, provide the user
Comfortable environment.While air-conditioning provides the user comfortableness, incident is the contradiction with high energy consumption.Energy ezpenditure is not
User's financial burden is increase only, it is also opposite with the trend of energy-conserving and environment-protective.Therefore, how to be provided the user comfortably using air-conditioning
The energy consumption of air-conditioning is reduced while environment, is the problem that current air-conditioner producer has been working hard solve.
Cause uncomfortable problem to solve refrigeration blowing cold air, the coil temperature that can be based on indoor heat exchanger is made
The control method of compressor operating frequency is controlled for control targe.In existing coil temperature control process, coil pipe target temperature
Adopt fixed value, a temperature fixed value being generally solidificated in accumulator for air conditioner.In actual use, often
There is a phenomenon：In the case where keeping user's design temperature constant, indoors during the close user's design temperature of temperature, user
Feel uncomfortable on the contrary, it is uncomfortable to feel that again meeting is different especially indoors in the case of humidity difference.Jing is analyzed, this
Coil temperature when phenomenon is user's design temperature close due to temperature indoors based on indoor heat exchanger as control targe come
Control compressor operating frequency and coil pipe target temperature is caused by fixed value.
Because the coil temperature of heat exchanger is to concern the key parameter that air conditioner coolant system and integrated air are adjusted, if control
System is improper, may bring air adjustment degradation, reduce the problem of comfortableness.Therefore, how to be carried out based on coil temperature
Rationally, comfortable and Energy Saving Control, is the problem urgently studied and solve.
The content of the invention
It is an object of the invention to provide a kind of convertible frequency air-conditioner control method for frequency and control device, realize air-conditioning energy-conservation,
Comfortable control.
For achieving the above object, the convertible frequency air-conditioner control method for frequency that the present invention is provided is given using following technical proposals
To realize：
A kind of convertible frequency air-conditioner control method for frequency, methods described includes：
Air conditioner refrigerating runs, and obtains real-time indoor environment temperature and setting indoor target temperature, calculates the real-time indoor environment
The temperature difference between temperature and the setting indoor target temperature, as the real-time indoor temperature difference, enters according to the real-time indoor temperature difference
Row room temperature PID computing, obtains first frequency；Air-conditioning place room is obtained using the infrared distance measurement unit with infrared distance sensor
Real-time range between interior target and air-conditioning, obtains and the real-time range according to the corresponding relation of known distance and frequency
Corresponding frequency, as second frequency；
The real-time indoor environment temperature is made comparisons with setting comfort temperature；
If the real-time indoor environment temperature is not less than the setting comfort temperature, the first following controls are performed：Select described
Smaller value in first frequency and the second frequency controls the compressor operating of air-conditioning；
If the real-time indoor environment temperature is less than the setting comfort temperature, the second following controls are performed：Obtain air-conditioning to steam
The real-time coil temperature and coil pipe target temperature of device are sent out, is calculated between the real-time coil temperature and the coil pipe target temperature
The temperature difference, as the real-time coil pipe temperature difference, according to the real-time coil pipe temperature difference disk temperature PID arithmetic is carried out, and obtains the 3rd frequency, selects institute
State the compressor operating that the smaller value in first frequency, the second frequency and the 3rd frequency controls air-conditioning；The coil pipe
Target temperature determines according to indoor real-time humidity, and it is little to meet coil pipe target temperature during the real-time high humidity.
To realize aforementioned invention purpose, the convertible frequency air-conditioner frequency control apparatus that the present invention is provided are given using following technical proposals
To realize：
A kind of convertible frequency air-conditioner frequency control apparatus, described device includes：
Indoor environment temperature acquiring unit, for obtaining real-time indoor environment temperature；
Coil temperature acquiring unit, for obtaining the real-time coil temperature of A/C evaporator；
Room temperature PID arithmetic element, for calculating the temperature difference between the real-time indoor environment temperature and setting indoor target temperature,
As the real-time indoor temperature difference, PID arithmetic is carried out according to the real-time indoor temperature difference, obtain and export first frequency；
Disk temperature PID arithmetic unit, for calculating the temperature difference between the real-time coil temperature and coil pipe target temperature, as real-time
The coil pipe temperature difference, according to the real-time coil pipe temperature difference PID arithmetic is carried out, and obtains and export the 3rd frequency；The coil pipe target temperature
Determined according to indoor real-time humidity, and it is little to meet coil pipe target temperature during the real-time high humidity；
Infrared distance measurement unit, with infrared distance sensor, for obtain air-conditioning reality between target indoors and air-conditioning
When distance；
Second frequency acquiring unit, for obtaining corresponding with the real-time range according to known distance and the corresponding relation of frequency
Frequency, as second frequency；
Control model select unit, for relatively more described real-time indoor environment temperature and setting comfort temperature, and knot is compared in output
Fruit is used as control model selection signal；
First control unit, the comparative result for exporting in the control model select unit is the real-time indoor environment temperature
When degree is not less than the setting comfort temperature, the smaller value in the first frequency and the second frequency is selected as target frequency
Rate, according to the target frequency compressor operating of air-conditioning is controlled；
Second control unit, the comparative result for exporting in the control model select unit is the real-time indoor environment temperature
When degree is less than the setting comfort temperature, select less in the first frequency, the second frequency and the 3rd frequency
Value controls the compressor operating of air-conditioning as target frequency according to the target frequency.
Compared with prior art, advantages of the present invention and good effect are：
In the present invention, when FREQUENCY CONTROL is carried out to compressor, the distance of temperature factor and target and air conditioning room has been considered
Cooperation between factor, realizes the energy-saving run of air-conditioning and comfortable air-supply.Additionally, the control for temperature factor to compressor frequency
In system, according to indoor environment temperature and the size for setting comfort temperature, select to control using room temperature PID or using based on evaporimeter
The disk temperature PID control of coil temperature, can lower the temperature in time, quickly when room temperature is high to room, reach refrigeration purpose, again may be used
So that coil temperature is stable in coil pipe target temperature so that air conditioning exhausting temperature pleasant, reach cool and not cold comfortable system
Cold effect.Also, the coil pipe target temperature during disk temperature PID control determines according to indoor real-time humidity, real-time high humidity
When coil pipe target temperature it is little so that indoors during high humidity control coil pipe approach and maintain relatively low target temperature, with condense
Moisture in more air, reduces air humidity, further improves the purpose of indoor air pleasant.
After the specific embodiment of the present invention is read in conjunction with the accompanying, the other features and advantages of the invention will become more clear
Chu.
Description of the drawings
Fig. 1 is the flow chart of convertible frequency air-conditioner control method for frequency one embodiment of the present invention；
Fig. 2 is the structured flowchart of convertible frequency air-conditioner frequency control apparatus one embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below with reference to drawings and Examples,
The present invention is described in further detail.
Fig. 1 is referred to, the figure show the flow chart of convertible frequency air-conditioner control method for frequency one embodiment of the present invention.
As shown in figure 1, the embodiment realize the method for convertible frequency air-conditioner FREQUENCY CONTROL using the flow process with following step come
Realize：
Step 11：Air conditioner refrigerating runs, and obtains real-time indoor environment temperature, setting indoor target temperature, meanwhile, obtain air-conditioning institute
Target indoors and the real-time range of air conditioning room.
Specifically, when air-conditioning start runs, the indoor environment temperature in room, real-time detection residing for real-time detection air-conditioning
Temperature as real-time indoor environment temperature.So-called real-time indoor environment temperature, refers to after air-conditioning start operation, according to setting
The indoor environment temperature that constant temperature degree sample frequency is constantly obtained and updated.The acquisition of indoor environment temperature in real time can adopt existing
Technology is realizing.For example, the temperature sensor by being arranged on air-conditioning air inlet or near air-conditioning air inlet is detected into wind-warm syndrome
Degree, the master control borad of air-conditioning passes through the output signal of collecting temperature sensor and is processed, so as to get EAT, and will
The temperature is used as real-time indoor environment temperature.
Setting indoor target temperature is referred to wishes the indoor environment target temperature to be reached, the setting indoor target temperature
A temperature value, or air-conditioning master that can be user be input into by remote control or control terminal for air conditioner or air-conditioning panel
The setting value that control plate is called automatically.No matter the temperature value is set using which kind of mode, can be got by air-conditioning master control borad.
After air-conditioning start operation, except the real-time indoor environment temperature in room residing for real-time detection air-conditioning, also to examine in real time
Survey air-conditioning target indoors, and determine the real-time range of target and air conditioning room.So-called real-time range, is in air-conditioning start
After operation, the distance between the indoor objects for constantly obtaining and updating according to setting sample frequency and air-conditioning.The detection of target and
Target and the distance of air conditioning room, are realized, simple structure using the infrared distance measurement unit with infrared distance sensor, easily real
Existing, cost is relatively low.Specifically, it is that infrared distance sensor and corresponding process circuit are set on air-conditioning, using infrared survey
The infrared signal sent away from sensor runs into the reflected intensity of obstacle target back reflection carries out the far and near detection of target.
Step 12：The temperature difference between real-time indoor environment temperature and setting indoor target temperature is calculated, as real-time interior
The temperature difference, according to the real-time indoor temperature difference room temperature PID computing is carried out, and obtains first frequency；It is corresponding with frequency according to known distance
Relation acquisition frequency corresponding with real-time range, as second frequency.
Master control borad calculates temperature between the two after real-time indoor environment temperature and setting indoor target temperature is got
Difference, as the real-time indoor temperature difference.Then, room temperature PID computing is carried out according to the real-time indoor temperature difference, acquisition is controlled to compressor
A frequency, and the frequency is defined as into first frequency.Wherein, carry out room temperature PID computing, obtain to compressor according to the temperature difference
The concrete grammar of the target frequency being controlled can realize that here is not elaborated and limits using prior art.
Meanwhile, frequency corresponding with real-time range is obtained always according to known distance and the corresponding relation of frequency, as the
Two frequencies.
Specifically, the corresponding relation of distance and frequency is previously stored with the memory of air-conditioning master control borad, wherein, away from
From the distance between indoor objects and air-conditioning is referred to, frequency refers to the running frequency of compressor.Preferably, distance is right with frequency
Should be related to be by research staff under theoretical direction, obtained by substantial amounts of operation of air conditioner simulated experiment, can be as far as possible
Take into account air-conditioning comfortableness and energy saving.And, positively related relation is presented between distance and frequency.That is, distance is less, frequency
Rate is also lower；Vice versa.And, the corresponding relation between distance and frequency can be calculated by specific calculation
A kind of relation, or by the one-to-one relation of the form of form.If being calculated by calculation, then
Calculation is prestored, after real-time range is obtained, real-time range correspondence is calculated according to real-time range and calculation
Frequency and as second frequency.And if the one-to-one relation formed by the form of form, obtaining real-time range
Afterwards, the corresponding frequency of real-time range can be read out in the way of taking according to real-time range and table look-up and as second frequency.Build
Vertical distance is with the starting point of the corresponding relation of frequency：Target is from air-conditioning apart from different, to leaving air temp requirement differences.In system
Under chill formula, air-out comfortableness the most rational is provided for target to enable air-conditioning, when target is in small distance with air-conditioning, the phase
Hope and raise leaving air temp, it is to avoid the too low wind of temperature causes discomfort to target, then limit frequency is carried out to compressor frequency, in limit
After frequency, leaving air temp can be raised, while can be with reducing energy consumption.
Step 13：Judge real-time indoor environment temperature whether less than setting comfort temperature.If so, execution step 15；If
It is no, execution step 14.
The step can simultaneously be carried out with step 12, and here is divided into two steps merely to clearly stating the reality
Apply the control process of example.After step 11 gets real-time indoor environment temperature, real-time indoor environment temperature is relaxed with setting
Thermophilic degree is made comparisons, and whether judges real-time indoor environment temperature less than setting comfort temperature, to be performed according to comparative result
The control of step 14 or step 15.Wherein, the default setting temperature that comfort temperature can be air-conditioning when dispatching from the factory is set, also may be used
Being voluntarily to be selected by user and a design temperature arranging.If by user's sets itself, air-conditioning can provide one
Reference temperature value, it is for reference.For example, it is proposed that the comfort temperature is set as into 27 DEG C.
Step 14：If step 13 judges that real-time indoor environment temperature, not less than setting comfort temperature, is performed following
First control：Select first frequency and the smaller value in second frequency as target frequency, air-conditioning is controlled according to target frequency
Compressor operating.
If in real time indoor environment temperature shows that now indoor temperature is higher not less than setting comfort temperature, need quick
Cooling.In the case of this, first frequency and second frequency that comparison step 12 is obtained select the smaller value in both, as target
Frequency, according to target frequency the compressor operating of air-conditioning is controlled.
Step 15：If step 13 judges real-time indoor environment temperature less than setting comfort temperature, following the is performed
Two controls：The real-time coil temperature and setting coil pipe target temperature of A/C evaporator are obtained, real-time coil temperature and coil pipe is calculated
The temperature difference between target temperature, as the real-time coil pipe temperature difference, according to the real-time coil pipe temperature difference disk temperature PID arithmetic is carried out, and obtains the 3rd
Frequency, selects the smaller value in first frequency, second frequency and the 3rd frequency as target frequency, empty according to target frequency control
The compressor operating of tune.
If step 13 judges that indoor temperature is less than comfort temperature, to avoid the too fast decline of temperature from causing body-sensing uncomfortable,
Evaporator coil temperature is further considered, to adjust compressor operating frequency in time so that evaporator coil temperature can be steady
Surely coil pipe target temperature is arrived, to adjust air conditioning exhausting temperature, cool and not cold comfortable air-out effect is reached.
Specifically, first, the real-time coil temperature and coil pipe target temperature of A/C evaporator are obtained, real-time coil pipe is calculated
The temperature difference between temperature and coil pipe target temperature, as the real-time coil pipe temperature difference, according to the real-time coil pipe temperature difference disk temperature PID fortune is carried out
Calculate, obtain the 3rd frequency.
Wherein, the detection of evaporator coil temperature can be detected by arranging coil temperature sensor on an evaporator.
Real-time detection goes out after coil temperature, the temperature difference between real-time coil temperature and setting coil pipe target temperature is calculated, by the temperature difference
As the coil pipe temperature difference.Wherein, coil pipe target temperature determines in real time according to indoor real-time humidity, and when meeting real-time high humidity
Coil pipe target temperature is little.Then, disk temperature PID arithmetic is carried out according to the coil pipe temperature difference, obtains the target frequency being controlled to compressor
Rate, and the target frequency is defined as into the 3rd target frequency.Disk temperature PID arithmetic obtains the target frequency being controlled to compressor
The method method that may be referred to room temperature PID computing of the prior art and obtain compressor target frequency.Wherein, disk temperature PID
The original frequency of computing can be the original frequency of a setting.Preferably, the original frequency of disk temperature PID arithmetic is sentenced for step 12
Fixed real-time indoor environment temperature is less than setting comfort temperature, into the current operation frequency of compressor during the second control process.And
And, the current operation frequency is at least in compressor operating for a period of time（Such as 3min）A running frequency afterwards.
Then, the smaller value in first frequency, second frequency and the 3rd frequency is selected as target frequency, according to target frequency
Rate controls the compressor operating of air-conditioning.
Frequency of air condition compressor is controlled using said method, has considered temperature factor and target and air conditioning room
Distance factor between cooperation, realize the energy-saving run of air-conditioning and comfortable air-supply.Additionally, considering temperature factor to compressor
In the control of frequency, according to indoor environment temperature and the size of setting comfort temperature, select that base is controlled or adopted using room temperature PID
In the disk temperature PID control of evaporator coil temperature, when room temperature is high room can be lowered the temperature in time, quickly, reach refrigeration
Purpose, again can be stable in coil pipe target temperature by coil temperature so that air conditioning exhausting temperature pleasant, reaches cool and not cold
Comfortable cooling effect.And, the coil pipe target temperature during disk temperature PID control determines according to indoor real-time humidity, real
When high humidity when coil pipe target temperature it is little so that indoors during high humidity control coil pipe approach and maintain relatively low target temperature
Degree, to condense more air in moisture, reduce air humidity, further improve the purpose of indoor air pleasant.
As preferred embodiment, coil pipe target temperature is determined according to indoor real-time humidity, specifically included：
Indoor real-time humidity is obtained, real-time humidity is made comparisons with comfort humidity scope.Comfort humidity scope is known, pre-
First store, be a humidity range for reflecting that human feeling is more suitable, for example, comfort humidity scope is for relative humidity
40-60%。
If in real time humidity belongs to comfort humidity scope, coil pipe target temperature will be recommended to be defined as performing disk temperature PID arithmetic
Actual coil pipe target temperature.
If in real time humidity is not belonging to comfort humidity scope and in real time humidity, will be low more than the higher limit of comfort humidity scope
It is defined as performing the actual coil pipe target temperature of disk temperature PID arithmetic in the temperature for recommending coil pipe target temperature.
Wherein, a temperature for recommend coil pipe target temperature to be known, prestoring, it is general, it is research staff Jing
One of heat exchange air that a large amount of theoretical researches and experiment test are obtained, that proper temperature can be sent under comfort humidity
Coil temperature.Certainly, the recommendation coil pipe target temperature can also be changed by mandate, for example, by personnel after sale in user
Modified by special instruction in family.
Adopt with the aforedescribed process according to real-time humidity determining during coil pipe target temperature, if in real time humidity belongs to comfortable wet
Degree scope, then using recommendation coil pipe target temperature as actual coil pipe target temperature, it is ensured that obtain when disk temperature PID control is performed
Suitable air conditioning exhausting.And if in real time humidity is not belonging to comfort humidity scope, and in real time humidity is more than comfort humidity scope
Higher limit, for example, more than 60%, shows that now indoor humidity is larger.In the case of this, coil pipe target temperature is reduced, specifically
Will be less than recommending the temperature of coil pipe target temperature to be defined as performing the actual coil pipe target temperature of disk temperature PID arithmetic.If in real time
Humidity is not belonging to comfort humidity scope and in real time humidity, less than the lower limit of comfort humidity scope, preferably will also recommend coil pipe mesh
Temperature is marked as actual coil pipe target temperature, to ensure to obtain the air conditioning exhausting of proper temperature.
And, during the second control is performed, real-time indoor environment temperature is still constantly obtained, and it is relatively more real-time
Indoor environment temperature and the size for setting comfort temperature.Once in real time indoor environment temperature is then moved back not less than setting comfort temperature
Go out the second control process, be transferred to the first control process, so that indoor temperature is stable in setting indoor target temperature.
As preferred embodiment, in real-time indoor environment temperature comfort temperature and in real time indoor environment temperature are not less than
When the difference of degree and setting comfort temperature is more than setting difference, then the second control process is exited, be transferred to the first control process.Pass through
Reasonable selection sets difference, for example, is set as 1 DEG C, it can be ensured that coil temperature is not less than coil pipe target temperature, it is ensured that go out cool
And not cold comfortableness.
As preferred embodiment, a setting highest frequency is previously stored with the memory of air-conditioning master control borad,
If step 14 judges that first frequency and the smaller value in second frequency judge first more than setting highest frequency, or step 15
Smaller value in frequency, second frequency and the 3rd frequency will then set highest frequency as target frequency more than setting highest frequency
Rate.That is, either according to which FREQUENCY CONTROL compressor, ensureing the running frequency of compressor less than setting highest
Frequency.
Fig. 2 is referred to, the structured flowchart of convertible frequency air-conditioner frequency control apparatus one embodiment of the present invention is the figure shows.
As shown in Fig. 2 the construction unit that included of the convertible frequency air-conditioner frequency control apparatus of the embodiment and its function are as follows：
Indoor environment temperature acquiring unit 201, for obtaining real-time indoor environment temperature.
Room temperature PID arithmetic element 202, for calculating the real-time indoor environment of the acquisition of indoor environment temperature acquiring unit 201
The temperature difference between temperature and setting indoor target temperature, as the real-time indoor temperature difference, according to the real-time indoor temperature difference PID fortune is carried out
Calculate, obtain and export first frequency.
Coil temperature acquiring unit 203, for obtaining the real-time coil temperature of A/C evaporator.
Disk temperature PID arithmetic unit 204, for calculating the real-time coil temperature and disk of the acquisition of coil temperature acquiring unit 203
The temperature difference between pipe target temperature, as the real-time coil pipe temperature difference, according to the real-time coil pipe temperature difference PID arithmetic is carried out, and is obtained and is exported
3rd frequency.Wherein, coil pipe target temperature determines according to indoor real-time humidity, and coil pipe target temperature when meeting real-time high humidity
Degree is little.
Infrared distance measurement unit 205, includes infrared distance sensor, for obtain in real time air-conditioning institute target indoors and
Real-time range between air-conditioning.
Second frequency acquiring unit 206, for according to the acquisition of the corresponding relation of known distance and frequency and real-time range
Corresponding frequency, as second frequency.
Control model select unit 207, for comparing the real-time indoor ring acquired in indoor environment temperature acquiring unit 201
Border temperature and setting comfort temperature, and comparative result is exported as control model selection signal.
First control unit 208, the comparative result for exporting in control model select unit 207 is real-time indoor environment
When temperature is not less than setting comfort temperature, the first frequency and second frequency for selecting the output of room temperature PID arithmetic element 202 obtains single
Smaller value in the second frequency of the output of unit 206 controls the compressor operating of air-conditioning as target frequency according to target frequency.
Second control unit 209, the comparative result for exporting in control model select unit 207 is real-time indoor environment
When temperature is less than setting comfort temperature, first frequency, the second frequency acquiring unit of the output of room temperature PID arithmetic element 202 are selected
Smaller value in the second frequency of 206 outputs and the 3rd frequency of the output of disk temperature PID arithmetic unit 204 is used as target frequency, root
The compressor operating of air-conditioning is controlled according to target frequency.
Used as preferred embodiment, frequency control apparatus can also include：
Indoor humidity acquiring unit, for obtaining the real-time humidity of interior.
Real-time humidity judging unit, for real-time humidity to be made comparisons with comfort humidity scope, and export real-time humidity and
The judged result of comfort humidity scope.
Coil pipe target temperature determining unit, for coil pipe target temperature will to be recommended when real-time humidity belongs to comfort humidity scope
Degree is defined as performing the actual coil pipe target temperature of disk temperature PID arithmetic and exporting to disk temperature PID arithmetic unit 204；And real-time
Humidity be not belonging to comfort humidity scope and in real time humidity more than comfort humidity scope higher limit when, will be less than recommending coil pipe mesh
The temperature of mark temperature is defined as performing the actual coil pipe target temperature of disk temperature PID arithmetic and exporting to disk temperature PID arithmetic unit
204。
Each construction unit in said apparatus runs corresponding software program, and the flow process according to preceding method performs air-conditioning
FREQUENCY CONTROL, realizes the energy-conservation of air-conditioning, comfortable control.
Above example is only illustrating technical scheme, rather than is limited；Although with reference to aforementioned reality
Apply example to be described in detail the present invention, for the person of ordinary skill of the art, still can be to aforementioned enforcement
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging claimed technical solution of the invention of appropriate technical solution.
Claims (7)
1. a kind of convertible frequency air-conditioner control method for frequency, it is characterised in that methods described includes：
Air conditioner refrigerating runs, and obtains real-time indoor environment temperature and setting indoor target temperature, calculates the real-time indoor environment
The temperature difference between temperature and the setting indoor target temperature, as the real-time indoor temperature difference, enters according to the real-time indoor temperature difference
Row room temperature PID computing, obtains first frequency；Air-conditioning place room is obtained using the infrared distance measurement unit with infrared distance sensor
Real-time range between interior target and air-conditioning, obtains and the real-time range according to the corresponding relation of known distance and frequency
Corresponding frequency, as second frequency；
The real-time indoor environment temperature is made comparisons with setting comfort temperature；
If the real-time indoor environment temperature is not less than the setting comfort temperature, the first following controls are performed：Select described
Smaller value in first frequency and the second frequency controls the compressor operating of air-conditioning；
If the real-time indoor environment temperature is less than the setting comfort temperature, the second following controls are performed：Obtain air-conditioning to steam
The real-time coil temperature and coil pipe target temperature of device are sent out, is calculated between the real-time coil temperature and the coil pipe target temperature
The temperature difference, as the real-time coil pipe temperature difference, according to the real-time coil pipe temperature difference disk temperature PID arithmetic is carried out, and obtains the 3rd frequency, selects institute
State the compressor operating that the smaller value in first frequency, the second frequency and the 3rd frequency controls air-conditioning；The coil pipe
Target temperature determines according to indoor real-time humidity, and it is little to meet coil pipe target temperature during the real-time high humidity.
2. method according to claim 1, it is characterised in that the coil pipe target temperature is true according to indoor real-time humidity
It is fixed, specifically include：
Indoor real-time humidity is obtained, the real-time humidity is made comparisons with comfort humidity scope；
If the real-time humidity belongs to the comfort humidity scope, coil pipe target temperature will be recommended to be defined as performing the disk temperature
The actual coil pipe target temperature of PID arithmetic；
If the real-time humidity is not belonging to the comfort humidity scope and the real-time humidity is more than the comfort humidity scope
Higher limit, the temperature that will be less than the recommendation coil pipe target temperature is defined as performing the actual coil pipe mesh of the disk temperature PID arithmetic
Mark temperature.
3. method according to claim 1, it is characterised in that the distance is that positive correlation is closed with the corresponding relation of frequency
System.
4. according to the method in any one of claims 1 to 3, it is characterised in that if the first frequency and described second
The smaller value in smaller value or the first frequency, the second frequency and the 3rd frequency in frequency is more than setting most
High-frequency, then control the compressor of air-conditioning as the target frequency using the setting highest frequency according to the target frequency
Operation.
5. according to the method in any one of claims 1 to 3, it is characterised in that in the process for performing second control
In, continue to obtain the real-time indoor environment temperature and make to compare with the setting comfort temperature by the real-time indoor environment temperature
Compared with, when the real-time indoor environment temperature is not less than the setting comfort temperature, the second described control is exited, perform described
First control.
6. a kind of convertible frequency air-conditioner frequency control apparatus, it is characterised in that described device includes：
Indoor environment temperature acquiring unit, for obtaining real-time indoor environment temperature；
Coil temperature acquiring unit, for obtaining the real-time coil temperature of A/C evaporator；
Room temperature PID arithmetic element, for calculating the temperature difference between the real-time indoor environment temperature and setting indoor target temperature,
As the real-time indoor temperature difference, PID arithmetic is carried out according to the real-time indoor temperature difference, obtain and export first frequency；
Disk temperature PID arithmetic unit, for calculating the temperature difference between the real-time coil temperature and coil pipe target temperature, as real-time
The coil pipe temperature difference, according to the real-time coil pipe temperature difference PID arithmetic is carried out, and obtains and export the 3rd frequency；The coil pipe target temperature
Determined according to indoor real-time humidity, and it is little to meet coil pipe target temperature during the real-time high humidity；
Infrared distance measurement unit, with infrared distance sensor, for obtain air-conditioning reality between target indoors and air-conditioning
When distance；
Second frequency acquiring unit, for obtaining corresponding with the real-time range according to known distance and the corresponding relation of frequency
Frequency, as second frequency；
Control model select unit, for relatively more described real-time indoor environment temperature and setting comfort temperature, and knot is compared in output
Fruit is used as control model selection signal；
First control unit, the comparative result for exporting in the control model select unit is the real-time indoor environment temperature
When degree is not less than the setting comfort temperature, the first frequency is selected to control air-conditioning with the smaller value in the second frequency
Compressor operating；
Second control unit, the comparative result for exporting in the control model select unit is the real-time indoor environment temperature
When degree is less than the setting comfort temperature, select less in the first frequency, the second frequency and the 3rd frequency
The compressor operating of value control air-conditioning.
7. device according to claim 6, it is characterised in that described device also includes：
Indoor humidity acquiring unit, for obtaining the real-time humidity of interior；
In real time humidity judging unit, for the real-time humidity to be made comparisons with comfort humidity scope, and exports the real-time wet
Spend the judged result with the comfort humidity scope；
Coil pipe target temperature determining unit, for coil pipe mesh will to be recommended when the real-time humidity belongs to the comfort humidity scope
Mark temperature is defined as performing the actual coil pipe target temperature of the disk temperature PID arithmetic and exports to the disk temperature PID arithmetic unit,
The comfort humidity scope is not belonging in the real-time humidity and the real-time humidity is more than the upper limit of the comfort humidity scope
During value, the temperature that will be less than the recommendation coil pipe target temperature is defined as performing the actual coil pipe target of the disk temperature PID arithmetic
Temperature is simultaneously exported to the disk temperature PID arithmetic unit.
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| CN201611087718.4A CN106610088A (en) | 2016-12-01 | 2016-12-01 | Frequency control method and device for variable-frequency air conditioner |
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| CN201611087718.4A CN106610088A (en) | 2016-12-01 | 2016-12-01 | Frequency control method and device for variable-frequency air conditioner |
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| CN101509694A (en) * | 2009-03-16 | 2009-08-19 | 宁波德斯科电子科技有限公司 | DC frequency converting air-conditioner compressor intelligent controller and control method thereof |
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