CN105066348A - Air-conditioning system, and power estimation method, power estimation device and power consumption calculation method of PTC heater in air-conditioning system - Google Patents
Air-conditioning system, and power estimation method, power estimation device and power consumption calculation method of PTC heater in air-conditioning system Download PDFInfo
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- CN105066348A CN105066348A CN201510469509.5A CN201510469509A CN105066348A CN 105066348 A CN105066348 A CN 105066348A CN 201510469509 A CN201510469509 A CN 201510469509A CN 105066348 A CN105066348 A CN 105066348A
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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
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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
- F24F11/62—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
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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
- F24F11/46—Improving electric energy efficiency or saving
Abstract
The invention discloses an air-conditioning system, and a power estimation method, a power estimation device and a power consumption calculation method of a PTC (Positive Temperature Coefficient) heater in the air-conditioning system. The power estimation method comprises the steps that a voltage effective value of an outdoor unit is acquired; an indoor environment temperature and a temperature of an indoor heat exchanger are acquired, and a surrounding environment temperature of the PTC heater is calculated by establishing a PTC surrounding environment temperature model function; power and a rotating speed of an indoor fan in an indoor unit are acquired, an angle of an air guide strip of the indoor unit is acquired, and volume of air passing through the PTC heater is calculated by establishing an air volume pattern function; and the voltage effective value of the outdoor unit, the surrounding environment temperature of the PTC heater and the volume of the air passing through the PTC heater act as first input variables, and running power of the PTC heater is estimated by performing modeling on the running power of the PTC heater according to the first input variables. According to the power estimation method, the running power of the PTC heater can be accurately obtained without increasing any hardware cost, so that the cost is saved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to the power estimating method of ptc heater in a kind of air-conditioning system, device, power consumption computational methods and air-conditioning system.
Background technology
In intelligent air condition, intelligent power and the management of power use are important functions, and the prerequisite of intelligent power and the management of power use detects the operate power of household electrical appliances and electricity.At present, what the electric power detection of air-conditioning adopted is ammeter module, and ammeter module cost is high, only has on high-end air-conditioning products and just can use, and cannot promote the use of on common air-conditioning device, and intelligent power and the management of power use cannot comprehensively be applied.The major reason of air-conditioning power and electric power detection is hindered to be that the power of PTC cannot obtain accurately.
PTC electric heater is applied in air-conditioning, effectively can increase the caloric value under air-conditioning heating pattern, improves the heating performance of air-conditioning.Therefore, PTC has been the standard configuration device in air-conditioning.Along with the awakening of energy-conserving and environment-protective consciousness, consumer becomes concern especially for the power consumption of household electrical appliance or operate power.PTC is the device that in air-conditioning, power consumption is larger, if the real time execution power of PTC can not accurately be known, the power consumption of air-conditioning just has no idea to obtain in a heating mode, only increase current sample link, but which adds the cost of air-conditioning, in household electric appliances with keen competition, increase cost not to be allowed to, therefore, how by existing hardware platform, the operate power accurately calculating PTC remains a technical barrier not obtaining solving very well.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the power estimating method proposing ptc heater in a kind of air-conditioning system, the method just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
Second object of the present invention is the power consumption computational methods proposing ptc heater in a kind of air-conditioning system.
3rd object of the present invention is the power estimation apparatus proposing ptc heater in a kind of air-conditioning system.
4th object of the present invention is to propose a kind of air-conditioning system.
To achieve these goals, the power estimating method of ptc heater in the air-conditioning system of first aspect present invention embodiment, comprises the following steps: by detecting the input voltage of pfc circuit in off-premises station to obtain the voltage effective value of described off-premises station; Obtain the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and described indoor environment temperature and described indoor heat exchanger joins is to calculate the ambient temperature of described ptc heater; Obtain power and the rotating speed of indoor fan in described indoor set, and obtain the angle of the wind guide strip of described indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip to calculate the air quantity flowing through described ptc heater; Using the ambient temperature of the voltage effective value of described off-premises station, described ptc heater and flow through described ptc heater air quantity as the first input variable, and according to described first input variable, modeling is carried out to estimate the operate power of described ptc heater to the operate power of described ptc heater.
According to the power estimating method of ptc heater in the air-conditioning system of the embodiment of the present invention, first the voltage effective value of off-premises station is obtained, obtain the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and by setting up PTC ambient temperature pattern function to calculate the ambient temperature of ptc heater, the power of indoor fan and the angle of rotating speed and wind guide strip in acquisition, and by setting up air quantity pattern function to calculate the air quantity flowing through ptc heater, then according to the voltage effective value of off-premises station, the ambient temperature of ptc heater carries out modeling with the air quantity flowing through ptc heater, to estimate the operate power of ptc heater, the method just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
In one embodiment of the invention, the PTC ambient temperature pattern function joined with the temperature correlation of described indoor environment temperature and described indoor heat exchanger is according to following equation expression:
T
PTC＝f(T1,T2)
Wherein,
S2, S1, d1 are the first matrix coefficient, f
11(x)=a*x
2+ b*x+c, d2, a, b, c are the first constant coefficient, u
1for matrix [T1, T2], T1 is described indoor environment temperature, and T2 is the temperature of described indoor heat exchanger, T
pTCfor the ambient temperature of described ptc heater.
In one embodiment of the invention, the air quantity pattern function be associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip is according to following equation expression:
AV
PTC＝g(P
fan,n,Angel)
Wherein,
Y2, Y1, m1 are the second matrix coefficient, f
12(x)=a1*x
2+ b1*x+c1, m2, a1, b1, c1 are the second constant coefficient, u
2for matrix [P
fan, n, Angel], P
fanfor the power of described indoor fan, n is the rotating speed of described indoor fan, and Angel is the angle of described wind guide strip, AV
pTCfor flowing through the air quantity of described ptc heater.
In one embodiment of the invention, the operate power of described ptc heater obtains according to following model assessment:
y＝f
2(∫Φ*f
1(∫Ε*u+θ
1)+θ
2)
Wherein, u is the input vector after described first input variable normalized, Ε and Φ is the weight parameter vector matrix of the first input variable described in model, θ
1and θ
2for the amount of bias of model, f
1() and f
2() is S type function, and y is model output valve.
To achieve these goals, the power consumption computational methods of ptc heater in the air-conditioning system of second aspect present invention embodiment, comprise the following steps: perform the power estimating method of first aspect present invention embodiment to estimate the operate power of described ptc heater; Integral operation is carried out to obtain the power consumption of described ptc heater to the operate power of described ptc heater.
According to the power consumption computational methods of ptc heater in the air-conditioning system of the embodiment of the present invention, without the need to increasing any hardware cost, just accurately can obtain the operate power of ptc heater and the power consumption of ptc heater by the mode of modeling, thus greatly improve Consumer's Experience.
To achieve these goals, the power estimation apparatus of ptc heater in the air-conditioning system of third aspect present invention embodiment, comprise indoor controller and outdoor controller, communicate between described indoor controller with described outdoor controller, wherein, described outdoor controller, for the input voltage by detecting pfc circuit in off-premises station to obtain the voltage effective value of described off-premises station, and sends to described indoor controller by the voltage effective value of described off-premises station; Described indoor controller, for obtaining the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and described indoor environment temperature and described indoor heat exchanger joins is to calculate the ambient temperature of described ptc heater; Described indoor controller, also for obtaining power and the rotating speed of indoor fan in described indoor set, and obtain the angle of the wind guide strip of described indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip to calculate the air quantity flowing through described ptc heater; Described indoor controller, also for using the ambient temperature of the voltage effective value of described off-premises station, described ptc heater and flow through described ptc heater air quantity as the first input variable, and according to described first input variable, modeling is carried out to estimate the operate power of described ptc heater to the operate power of described ptc heater.
According to the power estimation apparatus of ptc heater in the air-conditioning system of the embodiment of the present invention, outdoor controller obtains the voltage effective value of off-premises station, indoor controller obtains the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and by setting up PTC ambient temperature pattern function to calculate the ambient temperature of ptc heater, the power of indoor fan and the angle of rotating speed and wind guide strip during indoor controller also obtains, and by setting up air quantity pattern function to calculate the air quantity flowing through ptc heater, then indoor controller is according to the voltage effective value of off-premises station, the ambient temperature of ptc heater carries out modeling with the air quantity flowing through ptc heater, to estimate the operate power of ptc heater, this device just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
In one embodiment of the invention, the PTC ambient temperature pattern function joined with the temperature correlation of described indoor environment temperature and described indoor heat exchanger is according to following equation expression:
T
PTC＝f(T1,T2)
Wherein,
S2, S1, d1 are the first matrix coefficient, f
11(x)=a*x
2+ b*x+c, d2, a, b, c are the first constant coefficient, u
1for matrix [T1, T2], T1 is described indoor environment temperature, and T2 is the temperature of described indoor heat exchanger, T
pTCfor the ambient temperature of described ptc heater.
In one embodiment of the invention, the air quantity pattern function be associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip is according to following equation expression:
AV
PTC＝g(P
fan,n,Angel)
Wherein,
Y2, Y1, m1 are the second matrix coefficient, f
12(x)=a1*x
2+ b1*x+c1, m2, a1, b1, c1 are the second constant coefficient, u
2for matrix [P
fan, n, Angel], P
fanfor the power of described indoor fan, n is the rotating speed of described indoor fan, and Angel is the angle of described wind guide strip, AV
pTCfor flowing through the air quantity of described ptc heater.
In one embodiment of the invention, the operate power of described ptc heater obtains according to following model assessment:
y＝f
2(∫Φ*f
1(∫Ε*u+θ
1)+θ
2)
Wherein, u is the input vector after described first input variable normalized, Ε and Φ is the weight parameter vector matrix of the first input variable described in model, θ
1and θ
2for the amount of bias of model, f
1() and f
2() is S type function, and y is model output valve.
In one embodiment of the invention, described indoor controller is also for carrying out integral operation to obtain the power consumption of described ptc heater to the operate power of described ptc heater.
In one embodiment of the invention, described indoor controller is also for carrying out integral operation to obtain the power consumption of described ptc heater to the operate power of described ptc heater.
To achieve these goals, the air-conditioning system of fourth aspect present invention embodiment, comprises the power estimation apparatus of third aspect present invention embodiment.
According to the air-conditioning system of the embodiment of the present invention, owing to being provided with power estimation apparatus, just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the flow chart of the power estimating method of ptc heater in air-conditioning system according to an embodiment of the invention;
Fig. 2 is the block diagram of indoor set and off-premises station according to an embodiment of the invention;
Fig. 3 is the flow chart of the power estimating method of ptc heater in the air-conditioning system according to the present invention's specific embodiment;
Fig. 4 is the flow chart of the power consumption computational methods of ptc heater in air-conditioning system according to an embodiment of the invention;
Fig. 5 is the block diagram of the power estimation apparatus of ptc heater in air-conditioning system according to an embodiment of the invention.
Reference numeral:
Indoor controller 10 and outdoor controller 20.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
The power estimating method of ptc heater in the air-conditioning system of the embodiment of the present invention, device and air-conditioning system are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the power estimating method of ptc heater in air-conditioning system according to an embodiment of the invention.As shown in Figure 1, the power estimating method of ptc heater in the air-conditioning system of the embodiment of the present invention, comprises the following steps:
S1, by detecting the input voltage of pfc circuit in off-premises station to obtain the voltage effective value of off-premises station.
In air-conditioning, the watt level of PTC is mainly to PTC both end voltage, PTC ambient temperature with to flow through air quantity three factors of PTC relevant, because air-conditioning inside does not have more than sensor direct-detection three variablees, therefore need the size being calculated voltage, temperature and air quantity by the existing hardware foundation of air-conditioning in conjunction with the mode of data modeling, be illustrated in figure 2 the indoor set of air-conditioner and the structural representation of off-premises station.
Particularly, PTC both end voltage U
rmsdirectly affect the heating power of PTC, U
rmslarger, PTC operate power is larger, otherwise PTC operate power is less.Because the magnitude of voltage at PTC two ends is identical with off-premises station input voltage, it is all air-conditioning input voltage, therefore, off-premises station input voltage virtual value can be calculated by the input voltage sampled signal of off-premises station pfc circuit by algorithm, i.e. the voltage effective value U at PTC two ends
rms.
In one embodiment of the invention, according to the voltage effective value U of following formulae discovery off-premises station
rms:
Wherein, U
(n)for the input voltage sampled signal of off-premises station pfc circuit.
S2, obtains the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and indoor environment temperature and indoor heat exchanger joins is to calculate the ambient temperature of ptc heater.
In one embodiment of the invention, the PTC ambient temperature pattern function joined with the temperature correlation of indoor environment temperature and indoor heat exchanger is according to following equation expression:
T
PTC＝f(T1,T2)，(2)
Wherein,
f
11(x)＝a*x
2+b*x+c，(4)
Wherein, S2, S1, d1 are the first matrix coefficient, and d2, a, b, c are the first constant coefficient, u
1for matrix [T1, T2], T1 is indoor environment temperature, and T2 is the temperature of indoor heat exchanger, T
pTCfor the ambient temperature of ptc heater.
Particularly, PTC ambient temperature has direct impact to the heating power of PTC equally, when PTC ambient temperature is lower, PTC generate heat body and ambient temperature difference larger, the heat transfer effect of air is better, and the operate power of PTC is larger, and vice versa.
More specifically, in operation of air conditioner process, need Real-time Collection indoor environment temperature T1 and the indoor evaporator temperature T2 temperature of indoor heat exchanger (namely in indoor set), therefore can set up the data model with PTC ambient temperature by T1 and T2 temperature height, calculate PTC body ambient temperature T by T1 and T2 size
pTC.Below the ambient temperature calculating ptc heater is described in detail.
First, by experiment, under certain indoor environment temperature T1, the temperature T of PTC surrounding environment under different evaporators temperature T2 condition
pTC.And set up environment temperature estimation model function, as shown in formula (2).Wherein, f (T1, T2) function can have many forms, in one embodiment of the present of invention, and f (T1, T2) function formula, as shown in (3), wherein, f
11x (), as shown in (4), S2, S1, d1 are matrix coefficient, and d2, a, b, c are constant coefficient, experimentally test is determined; The scope of T1 is [-10 degrees Celsius, 50 degrees Celsius], every 1 degree of test point; The scope of T2 is [-10 degrees Celsius, 70 degrees Celsius], every 1 degree of test point.Then, according to the ambient temperature of formula (2), (3) and (4) calculating ptc heater.
S3, obtain power and the rotating speed of indoor fan in indoor set, and obtain the angle of the wind guide strip of indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip to calculate the air quantity flowing through ptc heater.
In one embodiment of the invention, the air quantity pattern function be associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip is according to following equation expression:
AV
PTC＝g(P
fan,n,Angel)，(5)
Wherein,
f
12(x)＝a1*x
2+b1*x+c1，(7)
Wherein, Y2, Y1, m1 are the second matrix coefficient, and m2, a1, b1, c1 are the second constant coefficient, u
2for matrix [P
fan, n, Angel], P
fanfor the power of indoor fan, n is the rotating speed of indoor fan, and Angel is the angle of wind guide strip, AV
pTCfor flowing through the air quantity of ptc heater.
Particularly, the air force flowing through PTC directly can have influence on the heat radiation of PTC, and therefore air quantity is larger, and PTC distribute heat is more, and therefore PTC operate power is larger, and vice versa.The power P of indoor fan
fanall directly can have influence on the size of air quantity with wind speed n, indoor set wind guide strip angle A ngel also can have influence on the structure in air channel and the smooth degree of air-out simultaneously, therefore also can have influence on the size of air quantity, is set up and air quantity AV by above three variable data
pTCdata model, as shown in (5).Describe in detail to calculating the air quantity flowing through ptc heater below.
First, first by experiment, in the power P of certain indoor fan
fanunder, flow through the air quantity AV of PTC in the rotating speed n of different chamber's inner blower and the angle A ngel situation of different wind guide strip
pTC.And set up air quantity pattern function, as shown in formula (5).Wherein, g (P
fan, n, Angel)) function can have many forms, in one embodiment of the invention, g (P
fan, n, Angel) and function formula, as shown in (6), f
12x () is as shown in (7).Wherein, Y2, Y1, m1 are matrix coefficient, and m2, a1, b1, c1 are constant coefficient, and experimentally test is determined; P
fanscope be [1W, 30W], test a point every 0.2W; The scope of n is [0 rev/min, 1600 revs/min], every 20 transfer to test point; The scope of Angle is [0 degree, 180 degree], every 2 degree of tests point.Then, according to formula (5, (6) and (7) calculate and flow through the air quantity of ptc heater.
S4, using the voltage effective value of off-premises station, the ambient temperature of ptc heater and flow through ptc heater air quantity as the first input variable, and according to the first input variable, modeling is carried out to estimate the operate power of ptc heater to the operate power of ptc heater.
Particularly, three factors affecting PTC operate power size are being calculated: the voltage effective value U of off-premises station
rms, ptc heater ambient temperature T
pTCwith the air quantity AV flowing through ptc heater
pTCprerequisite under, calculated the operate power P of PTC by data modeling
pTC=F (U
rms, T
pTC, AV
pTC).
In one embodiment of the invention, the operate power of ptc heater obtains according to following model assessment:
y＝f
2(∫Φ*f
1(∫Ε*u+θ
1)+θ
2)，(8)
Wherein, u is the input vector after the first input variable normalized, Ε and Φ is the weight parameter vector matrix of the first input variable in model, θ
1and θ
2for the amount of bias of model, f
1() and f
2() is S type function, and y is model output valve.
Wherein, f
1the process function that () is input vector,
σ, β in formula and
for given parameter, f
2()=f
1the process function that () is intermediate vector.
The power estimating method of ptc heater in the air-conditioning system of the embodiment of the present invention, first the voltage effective value of off-premises station is obtained, obtain the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and by setting up PTC ambient temperature pattern function to calculate the ambient temperature of ptc heater, the power of indoor fan and the angle of rotating speed and wind guide strip in acquisition, and by setting up air quantity pattern function to calculate the air quantity flowing through ptc heater, then according to the voltage effective value of off-premises station, the ambient temperature of ptc heater carries out modeling with the air quantity flowing through ptc heater, to estimate the operate power of ptc heater, the method just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
Fig. 3 is the flow chart of the power estimating method of ptc heater in the air-conditioning system according to the present invention's specific embodiment.As shown in Figure 3, the power estimating method of ptc heater in air-conditioning system, comprises the following steps:
S101, calculates the voltage effective value of off-premises station, i.e. PTC voltage effective value U by outdoor PFC voltage sampling circuit man
rms.
S102, calculates the ambient temperature T of ptc heater by data modeling according to the temperature T2 of indoor environment temperature T1 and indoor heat exchanger
pTC.
S103, according to the power P of indoor fan
fan, the rotating speed n of indoor fan and the angle A ngle of wind guide strip calculates the air quantity AV flowing through ptc heater by data modeling
pTC.
S104, by the above-mentioned factor affecting PTC power: input voltage U
rms, ambient temperature T
pTCwith air quantity AV
pTCthe operate power P of ptc heater is calculated by data modeling
pTC.
The power estimating method of the embodiment of the present invention, do not need additionally to add current sampling circuit, with only existing sampling unit in air-conditioning, do not increase any hardware cost, obtained the operate power of ptc heater by the means of modeling, thus complete machine power situation in a heating mode can be known, therefore, electric quantity metering unit can not be needed just can to obtain the power consumption of air-conditioning, thus greatly reduce cost.
In order to realize above-described embodiment, the invention allows for the power consumption computational methods of ptc heater in a kind of air-conditioning system.
Fig. 4 is the flow chart of the power consumption computational methods of ptc heater in air-conditioning system according to an embodiment of the invention.As shown in Figure 4, the power consumption computational methods of ptc heater in the air-conditioning system of the embodiment of the present invention, comprise the following steps:
S1, by detecting the input voltage of pfc circuit in off-premises station to obtain the voltage effective value of off-premises station.
S2, obtains the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and indoor environment temperature and indoor heat exchanger joins is to calculate the ambient temperature of ptc heater.
In one embodiment of the invention, the PTC ambient temperature pattern function joined with the temperature correlation of indoor environment temperature and indoor heat exchanger is expressed according to formula (2).
S3, obtain power and the rotating speed of indoor fan in indoor set, and obtain the angle of the wind guide strip of indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip to calculate the air quantity flowing through ptc heater.
In one embodiment of the invention, the air quantity pattern function be associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip is expressed according to formula (5).
S4, using the voltage effective value of off-premises station, the ambient temperature of ptc heater and flow through ptc heater air quantity as the first input variable, and according to the first input variable, modeling is carried out to estimate the operate power of ptc heater to the operate power of ptc heater.
In one embodiment of the invention, the model assessment of operate power according to formula (8) of ptc heater obtains.
Above-mentioned steps S1 to S4 is the step of the power estimating method of ptc heater in the air-conditioning system of the embodiment of the present invention.Elaborate in embodiment above, do not repeat them here.
S5, carries out integral operation to obtain the power consumption of ptc heater to the operate power of ptc heater.
The power consumption computational methods of ptc heater in the air-conditioning system of the embodiment of the present invention, without the need to increasing any hardware cost, just accurately can obtain the operate power of ptc heater and the power consumption of ptc heater by the mode of modeling, thus greatly improve Consumer's Experience.
To achieve these goals, the invention allows for the power estimation apparatus of ptc heater in a kind of air-conditioning system.
Fig. 5 is the block diagram, as shown in Figure 5 of the power estimation apparatus of ptc heater in air-conditioning system according to an embodiment of the invention, the power estimation apparatus of ptc heater in the air-conditioning system of the embodiment of the present invention, comprise: indoor controller 10 and outdoor controller 20, Serial Communication between indoor controller 10 and outdoor controller 20.
Wherein, the voltage effective value of off-premises station for passing through the input voltage of pfc circuit in detection off-premises station to obtain the voltage effective value of off-premises station, and is sent to indoor controller 10 by outdoor controller 20.
In air-conditioning, the watt level of PTC is mainly to PTC both end voltage, PTC ambient temperature with to flow through air quantity three factors of PTC relevant, because air-conditioning inside does not have more than sensor direct-detection three variablees, therefore need the size being calculated voltage, temperature and air quantity by the existing hardware foundation of air-conditioning in conjunction with the mode of data modeling.
Particularly, PTC both end voltage U
rmsdirectly affect the heating power of PTC, U
rmslarger, PTC operate power is larger, otherwise PTC operate power is less.Because the magnitude of voltage at PTC two ends is identical with off-premises station input voltage, it is all air-conditioning input voltage, therefore, outdoor controller 20 can calculate off-premises station input voltage virtual value by the input voltage sampled signal of off-premises station pfc circuit by algorithm, i.e. the voltage effective value U at PTC two ends
rms.
In one embodiment of the invention, outdoor controller 20 calculates the voltage effective value U of off-premises station according to formula (1)
rms.
Indoor controller 10 is for obtaining the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and indoor environment temperature and indoor heat exchanger joins is to calculate the ambient temperature of ptc heater.
Particularly, PTC ambient temperature has direct impact to the heating power of PTC equally, when PTC ambient temperature is lower, PTC generate heat body and ambient temperature difference larger, the heat transfer effect of air is better, and the operate power of PTC is larger, and vice versa.
More specifically, in operation of air conditioner process, need Real-time Collection indoor environment temperature T1 and the indoor evaporator temperature T2 temperature of indoor heat exchanger (namely in indoor set), therefore can set up the data model with PTC ambient temperature by T1 and T2 temperature height, calculate PTC body ambient temperature T by T1 and T2 size
pTC.
In one embodiment of the invention, the PTC ambient temperature pattern function joined with the temperature correlation of indoor environment temperature and indoor heat exchanger is expressed according to formula (2).Wherein, f (T1, the T2) function in formula (2) is expressed by formula (3), f
11x () is expressed by formula (4).
Indoor controller 10 is also for obtaining power and the rotating speed of indoor fan in indoor set, and obtain the angle of the wind guide strip of indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip to calculate the air quantity flowing through ptc heater.
Particularly, the air force flowing through PTC directly can have influence on the heat radiation of PTC, and therefore air quantity is larger, and PTC distribute heat is more, and therefore PTC operate power is larger, and vice versa.The power P of indoor fan
fanthe size of air quantity all directly can be had influence on wind speed n, indoor set wind guide strip angle A ngel also can have influence on the structure in air channel and the smooth degree of air-out simultaneously, therefore also can have influence on the size of air quantity, indoor controller 10 is set up and air quantity AV by above three variable data
pTCdata model.
In one embodiment of the invention, the air quantity pattern function be associated with the angle of the power of indoor fan, the rotating speed of indoor fan and wind guide strip is expressed according to formula (5).Wherein, the AV in formula (5)
pTC=g (P
fan, n, Angel) and g (P
fan, n, Angel)) function by formula (6) express, f
12x () is expressed by formula (7).
Indoor controller 10 also for using the voltage effective value of off-premises station, the ambient temperature of ptc heater and flow through ptc heater air quantity as the first input variable, and according to the first input variable, modeling is carried out to estimate the operate power of ptc heater to the operate power of ptc heater.
Particularly, three factors affecting PTC operate power size are being calculated: the voltage effective value U of off-premises station
rms, ptc heater ambient temperature T
pTCwith the air quantity AV flowing through ptc heater
pTCprerequisite under, indoor controller 10 calculates the operate power P of PTC by data modeling
pTC=F (U
rms, T
pTC, AV
pTC).
In one embodiment of the invention, the model assessment of operate power according to formula (8) of ptc heater obtains.
In one embodiment of the invention, indoor controller 10 is also for carrying out integral operation to obtain the power consumption of ptc heater to the operate power of ptc heater.
The power estimation apparatus of ptc heater in the air-conditioning system of the embodiment of the present invention, outdoor controller obtains the voltage effective value of off-premises station, indoor controller obtains the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and by setting up PTC ambient temperature pattern function to calculate the ambient temperature of ptc heater, the power of indoor fan and the angle of rotating speed and wind guide strip during indoor controller also obtains, and by setting up air quantity pattern function to calculate the air quantity flowing through ptc heater, then indoor controller is according to the voltage effective value of off-premises station, the ambient temperature of ptc heater carries out modeling with the air quantity flowing through ptc heater, to estimate the operate power of ptc heater, this device just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
In order to realize above-described embodiment, the invention allows for a kind of air-conditioning system.This air-conditioning system comprises the power estimation apparatus of ptc heater in the air-conditioning system of the embodiment of the present invention.
The air-conditioning system of the embodiment of the present invention, owing to being provided with power estimation apparatus, just accurately can obtain the operate power of ptc heater without the need to increasing any hardware cost, thus air-conditioning complete machine power situation in a heating mode can be known, thus greatly improve Consumer's Experience.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (11)
1. the power estimating method of ptc heater in air-conditioning system, is characterized in that, comprise the following steps:
By detecting the input voltage of pfc circuit in off-premises station to obtain the voltage effective value of described off-premises station;
Obtain the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and described indoor environment temperature and described indoor heat exchanger joins is to calculate the ambient temperature of described ptc heater;
Obtain power and the rotating speed of indoor fan in described indoor set, and obtain the angle of the wind guide strip of described indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip to calculate the air quantity flowing through described ptc heater;
Using the ambient temperature of the voltage effective value of described off-premises station, described ptc heater and flow through described ptc heater air quantity as the first input variable, and according to described first input variable, modeling is carried out to estimate the operate power of described ptc heater to the operate power of described ptc heater.
2. power estimating method according to claim 1, is characterized in that, the PTC ambient temperature pattern function joined with the temperature correlation of described indoor environment temperature and described indoor heat exchanger is according to following equation expression:
T
PTC＝f(T1,T2)
Wherein,
S2, S1, d1 are the first matrix coefficient, f
11(x)=a*x
2+ b*x+c, d2, a, b, c are the first constant coefficient, u
1for matrix [T1, T2], T1 is described indoor environment temperature, and T2 is the temperature of described indoor heat exchanger, T
pTCfor the ambient temperature of described ptc heater.
3. power estimating method according to claim 1, is characterized in that, the air quantity pattern function be associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip is according to following equation expression:
AV
PTC＝g(P
fan,n,Angel)
Wherein,
Y2, Y1, m1 are the second matrix coefficient, f
12(x)=a1*x
2+ b1*x+c1, m2, a1, b1, c1 are the second constant coefficient, u
2for matrix [P
fan, n, Angel], P
fanfor the power of described indoor fan, n is the rotating speed of described indoor fan, and Angel is the angle of described wind guide strip, AV
pTCfor flowing through the air quantity of described ptc heater.
4. power estimating method according to claim 1, is characterized in that, the operate power of described ptc heater obtains according to following model assessment:
y＝f
2(∫Φ*f
1(∫Ε*u+θ
1)+θ
2)
Wherein, u is the input vector after described first input variable normalized, Ε and Φ is the weight parameter vector matrix of the first input variable described in model, θ
1and θ
2for the amount of bias of model, f
1() and f
2() is S type function, and y is model output valve.
5. the power consumption computational methods of ptc heater in air-conditioning system, is characterized in that, comprise the following steps:
The power estimating method of execution according to any one of claim 1-4 is to estimate the operate power of described ptc heater;
Integral operation is carried out to obtain the power consumption of described ptc heater to the operate power of described ptc heater.
6. the power estimation apparatus of ptc heater in air-conditioning system, is characterized in that, comprise indoor controller and outdoor controller, communicate between described indoor controller with described outdoor controller, wherein,
Described outdoor controller, for the input voltage by detecting pfc circuit in off-premises station to obtain the voltage effective value of described off-premises station, and sends to described indoor controller by the voltage effective value of described off-premises station;
Described indoor controller, for obtaining the temperature of indoor heat exchanger in indoor environment temperature and indoor set, and the PTC ambient temperature pattern function that the temperature correlation passing through foundation and described indoor environment temperature and described indoor heat exchanger joins is to calculate the ambient temperature of described ptc heater;
Described indoor controller, also for obtaining power and the rotating speed of indoor fan in described indoor set, and obtain the angle of the wind guide strip of described indoor set, and by setting up the air quantity pattern function that is associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip to calculate the air quantity flowing through described ptc heater;
Described indoor controller, also for using the ambient temperature of the voltage effective value of described off-premises station, described ptc heater and flow through described ptc heater air quantity as the first input variable, and according to described first input variable, modeling is carried out to estimate the operate power of described ptc heater to the operate power of described ptc heater.
7. power estimation apparatus according to claim 6, is characterized in that, the PTC ambient temperature pattern function joined with the temperature correlation of described indoor environment temperature and described indoor heat exchanger is according to following equation expression:
T
PTC＝f(T1,T2)
Wherein,
S2, S1, d1 are the first matrix coefficient, f
11(x)=a*x
2+ b*x+c, d2, a, b, c are the first constant coefficient, u
1for matrix [T1, T2], T1 is described indoor environment temperature, and T2 is the temperature of described indoor heat exchanger, T
pTCfor the ambient temperature of described ptc heater.
8. power estimation apparatus according to claim 6, is characterized in that, the air quantity pattern function be associated with the angle of the power of described indoor fan, the rotating speed of described indoor fan and described wind guide strip is according to following equation expression:
AV
PTC＝g(P
fan,n,Angel)
Wherein,
Y2, Y1, m1 are the second matrix coefficient, f
12(x)=a1*x
2+ b1*x+c1, m2, a1, b1, c1 are the second constant coefficient, u
2for matrix [P
fan, n, Angel], P
fanfor the power of described indoor fan, n is the rotating speed of described indoor fan, and Angel is the angle of described wind guide strip, AV
pTCfor flowing through the air quantity of described ptc heater.
9. power estimation apparatus according to claim 6, is characterized in that, the operate power of described ptc heater obtains according to following model assessment:
y＝f
2(∫Φ*f
1(∫Ε*u+θ
1)+θ
2)
Wherein, u is the input vector after described first input variable normalized, Ε and Φ is the weight parameter vector matrix of the first input variable described in model, θ
1and θ
2for the amount of bias of model, f
1() and f
2() is S type function, and y is model output valve.
10. the power estimation apparatus according to any one of claim 6-9, is characterized in that, described indoor controller is also for carrying out integral operation to obtain the power consumption of described ptc heater to the operate power of described ptc heater.
11. 1 kinds of air-conditioning systems, is characterized in that, comprise the power estimation apparatus according to any one of claim 6-10.
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