CN105091222B - Power consumption quantity measuring method, device and the air conditioner of air conditioner - Google Patents
Power consumption quantity measuring method, device and the air conditioner of air conditioner Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 claims description 21
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- 238000004364 calculation method Methods 0.000 claims description 9
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- 238000009825 accumulation Methods 0.000 claims description 8
- 238000010606 normalization Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 4
- 238000012567 pattern recognition method Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 description 10
- 238000005070 sampling Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
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- 238000004378 air conditioning Methods 0.000 description 1
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Classifications
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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
- F24F11/30—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
- F24F11/47—Responding to energy costs
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Abstract
The invention discloses power consumption quantity measuring method, device and the air conditioner of a kind of air conditioner, this method includes：Outdoor controller obtains the instantaneous voltage and current instantaneous value of outdoor unit, and calculates the active power of outdoor fan and compressor；Outdoor controller calculates the voltage effective value of outdoor unit, and is sent to indoor controller；Indoor controller obtains the motor speed of indoor fan, the angle of indoor set wind guide strip, the temperature of indoor heat exchanger, indoor environment temperature and indoor environment humidity, estimates pattern function by establishing power to estimate the operation power of indoor fan；Using the voltage effective value of the temperature of indoor heat exchanger, the operation power of indoor fan and outdoor unit as the first input variable, the operation power to PTC is modeled to estimate PTC operation power indoor controller；The general power of air conditioner is obtained, integral operation is carried out to it to obtain the power consumption of air conditioner.This method, which need not increase any hardware cost, just can accurately obtain the power consumption of air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting power consumption of an air conditioner and the air conditioner.
Background
With the popularization of air conditioners and the increasing enhancement of awareness of energy conservation and emission reduction of users, the users pay more and more attention to the power and the power consumption of the air conditioners in the process of using the air conditioners, and therefore the accurate and effective feedback of the power utilization condition of the air conditioners to the users becomes the development direction of the air conditioners. In the related art, the power and the power consumption of the air conditioner are mainly obtained by the following two methods.
1) The power and the power consumption of the air conditioner are obtained by adding electric quantity detection hardware: for example, a dedicated electric quantity detection module is added to the input end of the air conditioner, or a voltage and current sensor is added to the input end of the air conditioner to detect a voltage and current signal at the input end of the air conditioner, and the electric power consumption of the air conditioner is calculated by a Micro Controller Unit (MCU). But the cost increase of this method is large.
2) The power and the power consumption of the air conditioner are obtained through pure software calculation without adding new hardware: in order to increase the Power Factor of the air conditioner, an outdoor unit of the air conditioner generally has a PFC (Power Factor Correction) circuit. The voltage and current signals of the outdoor unit are obtained by using the voltage and current detection circuit of the PFC circuit, the power of the outdoor unit is calculated by the MCU, and then the power of the indoor unit is estimated by combining the operation mode and the working condition of the air conditioner, so that the power and the power consumption of the air conditioner are calculated. In the method, because the power of the indoor unit is an estimated value, especially when the indoor unit is started by electric auxiliary heating, the power of the electric auxiliary heating is high and the fluctuation is large, and meanwhile, when the indoor fan is an alternating current PG fan, the current and voltage signals cannot be collected, so that the power of the indoor fan can be deviated, the accuracy of the calculated power and the power consumption of the air conditioner is low, and the actual requirements of users are difficult to meet.
Therefore, a method of obtaining power and power consumption of the air conditioner is desired to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a method for detecting power consumption of an air conditioner, which can accurately obtain total power and power consumption of the air conditioner without increasing any hardware cost, thereby greatly improving user experience.
A second object of the present invention is to provide a power consumption detecting apparatus for an air conditioner.
A third object of the present invention is to provide an air conditioner.
In order to achieve the above object, a method for detecting power consumption of an air conditioner according to an embodiment of the present invention includes an indoor unit and an outdoor unit, the indoor unit includes an indoor controller, an indoor fan, an indoor heat exchanger, and a PTC heater, the outdoor unit includes an outdoor controller, an outdoor fan, a compressor, and an outdoor heat exchanger, and the method includes: the outdoor controller acquires a voltage instantaneous value and a current instantaneous value of the outdoor unit, and calculates active power of the outdoor fan and the compressor according to the voltage instantaneous value and the current instantaneous value of the outdoor unit; the outdoor controller calculates the effective voltage value of the outdoor unit according to the instantaneous voltage value of the outdoor unit and sends the effective voltage value of the outdoor unit to the indoor controller; the indoor controller acquires the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity, and estimates the operating power of the indoor fan by establishing a power estimation model function associated with the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity; the indoor controller takes the temperature of the indoor heat exchanger, the operating power of the indoor fan and the effective voltage value of the outdoor unit as first input variables, and models the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater; and performing accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan and operating power of the PTC heater to obtain total power of the air conditioner, and performing integral operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
According to the power consumption detection method of the air conditioner, the outdoor controller calculates the active power of the outdoor fan and the compressor, the indoor controller estimates the running power of the indoor fan by establishing the power estimation model function, the indoor controller estimates the running power of the PTC heater by a modeling method, and further obtains the total power of the air conditioner, so that the power consumption of the air conditioner is obtained, the method can accurately obtain the total power and the power consumption of the air conditioner without increasing any hardware cost, and the user experience is greatly improved.
In an embodiment of the present invention, the outdoor controller obtains a current instantaneous value of the outdoor unit by detecting a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by detecting a dc output terminal voltage of the rectifier bridge.
In one embodiment of the invention, the operating power of the PTC heater is estimated according to the following model:
y＝f2(∫Φ*f1(∫Ε*u+θ1)+θ2)
wherein u is the input vector after normalization processing of the first input variable, E and phi are weight parameter vector matrices of the first input variable in a model, theta1And theta2Is the offset of the model, f1() And f2() Is an S-type function, and y is a model output value.
In one embodiment of the present invention, when estimating the operating power of the PTC heater, the indoor controller uses the indoor ambient temperature, the indoor ambient humidity, and the angle of the air guide strip of the indoor unit as second input variables, obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and adds the deviation compensation amount to the operating power of the PTC heater to perform compensation correction on the operating power of the PTC heater.
In one embodiment of the present invention, the offset compensation amount is obtained according to the following formula:
wherein, α1、α2、ρ1、ρ2、γ1、γ2Andfor the model parameters compensated and corrected by the pattern recognition method, T1, H and a are second input variables corresponding to the indoor ambient temperature, the indoor ambient humidity and the angle of the wind guide strip, Δ PPTCCompensating for the deviation.
In one embodiment of the present invention, a power estimation model function associated with a motor speed of the indoor fan, an angle of a wind guide strip of the indoor unit, a temperature of the indoor heat exchanger, the indoor ambient temperature, and the indoor ambient humidity is represented by the following equation:
P＝F(n，A，T2)+G(T1，H)
wherein,f11(x)＝a*x2+ b x + c, S2, S1 and d1 are matrix coefficients, d2, a, b and c are first constant coefficients, and u is a constant coefficient1Is a matrix [ n, A, T2]，G(T1,H)＝a1*T12+b1*T1+a2*H2+ b2 × H + c1+ c2, a1, b1, c1, a2, b2, and c2 are all second constant coefficients, n is the motor rotation speed of the indoor fan, T2 is the temperature of the indoor heat exchanger, T1 is the indoor ambient temperature, H is the indoor ambient humidity, and a is the angle of the air guide strip.
In order to achieve the above object, a power consumption detecting apparatus of an air conditioner according to an embodiment of a second aspect of the present invention includes an indoor unit and an outdoor unit, wherein the indoor unit includes an indoor fan, an indoor heat exchanger, and a PTC heater, the outdoor unit includes an outdoor fan, a compressor, and an outdoor heat exchanger, and the power consumption detecting apparatus includes an outdoor controller and an indoor controller, wherein the outdoor controller is configured to obtain a voltage instantaneous value and a current instantaneous value of the outdoor unit, and calculate active powers of the outdoor fan and the compressor according to the voltage instantaneous value and the current instantaneous value of the outdoor unit; the outdoor controller is further used for calculating a voltage effective value of the outdoor unit according to the voltage instantaneous value of the outdoor unit and sending the voltage effective value of the outdoor unit to the indoor controller; the indoor controller is used for acquiring the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity, and estimating the operating power of the indoor fan by establishing a power estimation model function related to the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity; the indoor controller is further used for taking the temperature of the indoor heat exchanger, the operating power of the indoor fan and the effective voltage value of the outdoor unit as first input variables, and modeling the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater; the outdoor controller and/or the indoor controller performs an accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan and operating power of the PTC heater to obtain total power of the air conditioner, and performs an integration operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
According to the power consumption detection device of the air conditioner, the outdoor controller calculates the active power of the outdoor fan and the compressor, the indoor controller estimates the operating power of the indoor fan by establishing a power estimation model function, the indoor controller also estimates the operating power of the PTC heater by modeling, and further obtains the total power of the air conditioner, so that the power consumption of the air conditioner is obtained, the device can accurately obtain the total power and the power consumption of the air conditioner without increasing any hardware cost, and the user experience is greatly improved.
In an embodiment of the present invention, the outdoor controller obtains a current instantaneous value of the outdoor unit by detecting a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by detecting a dc output terminal voltage of the rectifier bridge.
In one embodiment of the invention, the operating power of the PTC heater is estimated according to the following model:
y＝f2(∫Φ*f1(∫Ε*u+θ1)+θ2)
wherein u is the input vector after normalization processing of the first input variable, E and phi are weight parameter vector matrices of the first input variable in a model, theta1And theta2Is the offset of the model, f1() And f2() Is an S-type function, and y is a model output value.
In one embodiment of the present invention, when estimating the operating power of the PTC heater, the indoor controller further uses the indoor ambient temperature, the indoor ambient humidity, and the angle of the air guide strip of the indoor unit as second input variables, obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and adds the deviation compensation amount to the operating power of the PTC heater to perform compensation correction on the operating power of the PTC heater.
In one embodiment of the present invention, the offset compensation amount is obtained according to the following formula:
wherein, α1、α2、ρ1、ρ2、γ1、γ2Andfor the model parameters compensated and corrected by the pattern recognition method, T1, H and a are second input variables corresponding to the indoor ambient temperature, the indoor ambient humidity and the angle of the wind guide strip, Δ PPTCCompensating for the deviation.
In one embodiment of the present invention, a power estimation model function associated with a motor speed of the indoor fan, an angle of a wind guide strip of the indoor unit, a temperature of the indoor heat exchanger, the indoor ambient temperature, and the indoor ambient humidity is represented by the following equation:
P＝F(n，A，T2)+G(T1，H)
wherein,f11(x)＝a*x2+ b x + c, S2, S1 and d1 are matrix coefficients, d2, a, b and c are first constant coefficients, and u is a constant coefficient1Is a matrix [ n, A, T2]，G(T1,H)＝a1*T12+b1*T1+a2*H2+ b2 × H + c1+ c2, a1, b1, c1, a2, b2, and c2 are all second constant coefficients, n is the motor rotation speed of the indoor fan, T2 is the temperature of the indoor heat exchanger, T1 is the indoor ambient temperature, H is the indoor ambient humidity, and a is the angle of the air guide strip.
In order to achieve the above object, an air conditioner according to an embodiment of the third aspect of the present invention includes the power consumption amount detection apparatus according to the embodiment of the second aspect of the present invention.
According to the air conditioner provided by the embodiment of the invention, due to the adoption of the power consumption detection device, the total power and the power consumption of the air conditioner can be accurately obtained without increasing any hardware cost, so that the user experience is greatly improved.
Drawings
Fig. 1 is a flowchart of a power consumption amount detection method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a block diagram of an indoor unit and an outdoor unit according to an embodiment of the present invention;
fig. 3 is a flowchart of a power consumption detecting method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a block diagram of a power consumption amount detection apparatus of an air conditioner according to an embodiment of the present invention.
Reference numerals:
an outdoor controller 10 and an indoor controller 20.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a method and device for detecting power consumption of an air conditioner and the air conditioner according to an embodiment of the present invention with reference to the accompanying drawings. Fig. 1 is a flowchart of a power consumption amount detection method of an air conditioner according to an embodiment of the present invention. The air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises an indoor controller, an indoor fan, an indoor heat exchanger and a PTC heater, and the outdoor unit comprises an outdoor controller, an outdoor fan, a compressor and an outdoor heat exchanger.
The method for detecting the power consumption of the air conditioner is suitable for the air conditioner of which the indoor fan is a PG fan and the outdoor compressor and the fan are both PMSM or BLDC direct current motors.
As shown in fig. 1, the method for detecting power consumption of an air conditioner according to an embodiment of the present invention includes the following steps:
and S1, the outdoor controller acquires the instantaneous voltage value and instantaneous current value of the outdoor unit and calculates the active power of the outdoor fan and the compressor according to the instantaneous voltage value and instantaneous current value of the outdoor unit.
In an embodiment of the present invention, the outdoor controller obtains a current instantaneous value of the outdoor unit by detecting a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by detecting a dc output terminal voltage of the rectifier bridge.
Specifically, the outdoor fan and the outdoor compressor used by the outdoor unit are all variable frequency motors, and the outdoor fan and the outdoor compressor are driven after inversion of direct current voltage. Therefore, as shown in fig. 2, the outdoor controller obtains a current instantaneous value of the outdoor unit by obtaining a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by obtaining a dc output voltage of the rectifier bridge.
Further, the outdoor controller calculates active power P of the outdoor fan and the compressor according to the instantaneous current value of the outdoor unit and the instantaneous voltage value of the outdoor unitMOTOR。
And S2, the outdoor controller calculates the effective voltage value of the outdoor unit according to the instantaneous voltage value of the outdoor unit and sends the effective voltage value of the outdoor unit to the indoor controller.
Specifically, the outdoor controller calculates an effective voltage value of the outdoor unit from an instantaneous voltage value of the outdoor unit, and sends the effective voltage value of the outdoor unit to the indoor controller. Because the voltage instantaneous value is the same as the input voltage instantaneous value of the whole machine, only the phase changes through the rectifier bridge, and therefore the voltage effective value is the same as the whole machine voltage effective value.
And S3, the indoor controller acquires the motor speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity, and estimates the operating power of the indoor fan by establishing a power estimation model function related to the motor speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity.
In one embodiment of the present invention, a power estimation model function associated with a motor rotation speed of an indoor fan, an angle of a wind guide strip of an indoor unit, a temperature of an indoor heat exchanger, an indoor ambient temperature, and an indoor ambient humidity is represented by the following formula (1):
P＝F(n，A，T2)+G(T1，H)， (1)
wherein,
f11(x)＝a*x2+b*x+c， (3)
G(T1,H)＝a1*T12+b1*T1+a2*H2+b2*H+c1+c2， (4)
wherein S2, S1 and d1 are matrix coefficients, d2, a, b and c are first constant coefficients, u is1Is a matrix [ n, A, T2]A1, b1, c1, a2, b2 and c2 are all second constant coefficients, n is the motor rotating speed of the indoor fan, T2 is the temperature of the indoor heat exchanger, T1 is the indoor environment temperature, H is the indoor environment humidity, and A is the angle of the air guide strip.
The method for estimating the operating power of the indoor fan by the indoor controller will be described in detail below.
Firstly, through experiments, under the condition of the same rotating speed n, different wind guide angles a, different evaporator temperatures T2 (namely, the temperatures of the indoor heat exchangers), different air temperatures T1 (namely, the indoor ambient temperatures) and different air humidity H, the power is obtained. And establishing a power estimation model function, wherein P is the power of a PG motor of an air conditioner indoor unit, namely the running power P of an indoor fan as shown in formula (1)FAN。
Wherein, F (n, A, T2) is the main function, F (n, A, T2) function can realize PG main power estimation, G (T1, H) is the compensation function, and is used for correcting the result of F (n, A, T2) calculation by fine tuning.
Wherein the F (n, A, T2) function and G (T1, H) can have various expressions, in one embodiment of the invention, the F (n, A, T2) function formula is shown in (2), wherein F11(x) As shown in (3). S2, S1 and d1 are matrix coefficients, d2, a, b and c are constant coefficients and are determined according to experimental tests; n ranges from [500rpm,1300rpm]Test one point every 5 prm; the range of the angle A of the air guide strip is determined according to the air guide angle range of the air conditioner indoor unit, and in one embodiment of the invention, the range A is [0 degree, 80 degrees ]]Testing one point every 2 degrees; t2 is in the range of [ -10 degrees Celsius, 60 degrees Celsius]Every 2 degrees, one point is tested.
In addition, the formula of the G (T1, H) function is shown in (4), wherein a1, b1, c1, a2, b2 and c2 are constant coefficients and are determined according to experimental tests; t1 was in the range of [ -10 degrees Celsius, 50 degrees Celsius ], with one point tested every 2 degrees; h ranged from [10,90], with one point tested every 5 RH.
Secondly, the indoor controller receives a motor rotating speed instruction input by an air conditioner control program; then, the indoor controller controls the PG motor to operate, calculates the rotating speed of the motor through a motor pulse feedback signal, and adjusts the chopping time of the PG motor, so that the operating rotating speed of the motor is adjusted to the input motor rotating speed instruction value; further, the indoor controller controls the motor to operate, simultaneously controls the angle of the air guide strip to operate according to the set angle or the swing state of the air conditioning system, and detects the indoor evaporator temperature T2 and the indoor environment temperature T1 in real time; and finally, calculating the real-time power of the PG motor according to the power estimation model function (1).
And S4, the indoor controller takes the temperature of the indoor heat exchanger, the operating power of the indoor fan and the effective voltage value of the outdoor unit as first input variables, and models the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater.
Specifically, the influence on the PTC power during the use of the air conditioner mainly includes three main factors, namely, ambient temperature, voltage value, and air volume, and the three factors are directly related to the temperature of the evaporator T2 (i.e., the temperature of the indoor heat exchanger), the effective value of the input voltage (i.e., the effective value of the voltage of the outdoor unit), and the operating power of the outdoor fan.
The evaporator temperature T2 is the temperature closest to the PTC, and the larger the evaporator temperature T2 is, the smaller the required heat generation amount of the PTC is, i.e., the larger T2 is, the smaller the PTC operation power is, and conversely, the larger the PTC operation power is. The minimum value of the evaporator temperature T2 was set to 10 degrees celsius and the maximum value was 80 degrees celsius, encompassing the range in which T2 might occur; power P of indoor fanFANThe heat dissipation of the PTC is influenced, the higher the power is, the better the heat dissipation is, and the PTC can emit more heat to maintain the temperature, namely PFANThe larger the PTC operation power, the smaller the PTC operation power, on the contrary. Fan power PFANThe minimum value of (2) and the maximum value of (30) are taken as values; the effective voltage value U of the outdoor unit directly influences the heating power of the PTC, the larger the U is, the larger the PTC operation power is, and otherwise, the smaller the PTC operation power is. The minimum value of the PTC input voltage U effective value is 150V, the maximum value is 280V, and the voltage upper and lower limits which may appear in the power grid in China are limited.
More specifically, the above main influence factor is used as an input variable (i.e., the first input variable) to establish a data model between the PTC power level and the above main influence factor, which can be expressed as follows: y ═ f (u), where y represents the modelThe output value, u, is the respective input vector, u ═ u1,u2,...,um) The PTC real-time power value is input in a multi-dimension mode, the input variables are sampling values which mainly affect the PTC operation power, and the current PTC real-time power value can be obtained by inputting the sampling values into the software digital model of the invention.
In one embodiment of the invention, the operating power P of the PTC heaterPTCEstimated according to the following model:
y＝f2(∫Φ*f1(∫Ε*u+θ1)+θ2)， (5)
u is an input vector after normalization processing of the first input variable, and E and phi are weight parameter vector matrixes of the first input variable in the model, and theta1And theta2Is the offset of the model, f1() And f2() Is an S-type function, and y is a model output value.
Wherein f is1() As a function of the processing of the input vector,σ in the formula, β andfor a given parameter, f2()＝f1() Is the processing function of the intermediate vector.
In one embodiment of the present invention, in estimating the operating power of the PTC heater, the indoor controller takes the indoor ambient temperature, the indoor ambient humidity, and the angle of the air guide strip of the indoor unit as second input variables, and obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and superimposes the deviation compensation amount on the operating power of the PTC heater to perform compensation correction on the operating power of the PTC heater.
In particular, there are also secondary factors that affect PTC power, such as: the indoor environment temperature T1, the indoor environment humidity H, the angle A of the air guide strips and the like.
The indoor environment temperature T1 directly influences the magnitude of T2, so that the operation power of the PTC is indirectly influenced, the smaller T1 is, the smaller T2 is relatively smaller, so that the operation power of the PTC is larger, namely the smaller T1 is, the larger the operation power of the PTC is, and the smaller the operation power of the PTC is; the indoor environment humidity H can also influence the heat dissipation of the PTC, the larger the humidity is, the more the moisture in the air is, and more heat can be taken away when the air passes through the evaporator and the PTC, therefore, the larger the H is, the greater the operating power of the PTC can be, on the contrary, the operating power of the PTC becomes smaller, and certainly, the influence of the humidity is not obvious; the angle A of the air guide strip affects the structure of an air outlet of an air conditioner, when the air guide strip is positioned at a standard 90-degree angle, the air outlet quantity of the air duct is the largest, the heat dissipation is the best, when the air guide strip is positioned at 0 degree or 180 degrees, the air outlet is blocked by the air guide strip, the air outlet quantity of the air duct is the smallest, the heat dissipation is the worst, namely when the angle A is positioned at 90 degrees, the operation power of the PTC is the largest relative to other angles, and the deviation from 90.
More specifically, we take into account secondary factors to improve the accuracy of the PTC estimation by adding compensation to the output, the mathematical expression for this compensation function being as follows: delta PPTC＝ξ(um+1,…,un) Wherein u ism+1、…、unI.e. the input sample value, Δ P, for the compensation correctionPTCI.e., the offset compensation amount of the PTC power, ξ () is a compensation correction function.
In one embodiment of the present invention, the offset compensation amount is obtained according to the following formula:
wherein, α1、α2、ρ1、ρ2、γ1、γ2Andmodel parameters for compensation correction by pattern recognition, T1,H and A are second input variables corresponding to the indoor ambient temperature, the indoor ambient humidity and the angle of the air guide strip, and delta PPTCIs a deviation compensation amount.
And S5, performing accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan and operating power of the PTC heater to obtain total power of the air conditioner, and performing integral operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
In one embodiment of the invention, the indoor controller also calculates the power of other loads in the indoor unit.
Specifically, the indoor controller estimates power according to the working state of the indoor controller and the working states of other loads, the indoor fan and the PTC and the stepping motor are mainly divided into two states of working and stopping, the power is 2W in the working state, the power is 0W in the stopping state, the power of the electric control board is 1.5W in the working state, and the power is 0.2W in the standby state.
In one embodiment of the invention, the outdoor controller also calculates the power of other loads in the outdoor unit.
Specifically, the outdoor controller estimates power according to the working state of the outdoor controller and the working states of other loads, the outdoor unit comprises a four-way valve and an electronic expansion valve besides a fan and a compressor, the power of the outdoor unit is basically constant in each state, the power of the four-way valve is 5W in the working state, the power of the four-way valve is 0W in the stopping state, the power of the electronic expansion valve is 3W in the working state, the power of the electronic expansion valve is 0W in the stopping state, the power of the electronic control board is 3W in the working state, and the power of the electronic control board is 0.5W in standby.
More specifically, the active power P to the outdoor fan and compressorMOTORAnd the running power P of the indoor fanFANAnd operating power P of the PTC heaterPTCAnd performing accumulation calculation on the power of other loads in the indoor unit and the power of other loads in the outdoor unit to obtain the total power of the air conditioner, and performing integral operation on the total power of the air conditionerTo obtain the power consumption of the air conditioner.
In an embodiment of the invention, the real-time power size and power consumption information of the air conditioner can be transmitted to the mobile phone APP and the server for the user to query and analyze data.
According to the power consumption detection method of the air conditioner, the outdoor controller calculates the active power of the outdoor fan and the compressor, the indoor controller estimates the operating power of the indoor fan by establishing the power estimation model function, the indoor controller estimates the operating power of the PTC heater by a modeling method, and further obtains the total power of the air conditioner, so that the power consumption of the air conditioner is obtained, the method can accurately obtain the total power and the power consumption of the air conditioner without increasing any hardware cost, and therefore user experience is greatly improved.
Fig. 3 is a method for detecting power consumption of an air conditioner according to an embodiment of the present invention. As shown in fig. 3, the method for detecting power consumption of an air conditioner according to an embodiment of the present invention includes the following steps:
s101, the outdoor controller calculates active power P of the outdoor compressor and the outdoor fan according to instantaneous values of PFC voltage and current sampling circuitsMOTORAnd transmitting the calculated effective voltage value of the outdoor unit to the indoor controller.
And S102, calculating the power of other loads of the outdoor unit, such as a four-way valve, an electronic expansion valve and the like, by the outdoor controller.
S103, the indoor controller calculates the active power P of the indoor fan through data modeling according to the data such as the motor speed n, the condenser pipe temperature T2, the indoor environment temperature T1, the air guide strip angle A and the indoor environment humidity HFAN。
And S104, the indoor controller calculates the operation power of the PTC heater through data modeling according to the voltage effective value, the indoor temperature T1, the evaporator temperature T2, the indoor fan power, the air guide strip angle, the indoor environment humidity, the PTC switching condition and other information transmitted by the outdoor controller.
And S105, the indoor controller calculates the power of other load parts of the indoor unit, such as a stepping motor, a circuit board and the like.
And S106, accumulating the power values calculated by the parts to calculate the power of the whole air conditioner, and calculating the power consumption of the air conditioner through integration.
And S107, transmitting the real-time power and power consumption information of the air conditioner to a mobile phone APP and a server for a user to inquire and analyze data.
In order to implement the above embodiments, the invention further provides a power consumption detection device of the air conditioner.
Fig. 4 is a block diagram illustrating a power consumption detecting apparatus of an air conditioner according to an embodiment of the present invention. The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an indoor fan, an indoor heat exchanger and a PTC heater, the outdoor unit comprises an outdoor fan, a compressor and an outdoor heat exchanger, and the power consumption detection device comprises an outdoor controller 10 and an indoor controller 20.
The power consumption detection device of the air conditioner is suitable for the air conditioner of which the indoor fan is a PG fan and the outdoor compressor and the fan are both PMSM or BLDC direct current motors.
The outdoor controller 10 is configured to obtain a voltage instantaneous value and a current instantaneous value of the outdoor unit, and calculate active power of the outdoor fan and the compressor according to the voltage instantaneous value and the current instantaneous value of the outdoor unit.
In an embodiment of the present invention, the outdoor controller 10 obtains a current instantaneous value of the outdoor unit by detecting a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by detecting a dc output terminal voltage of the rectifier bridge.
Specifically, the outdoor fan and the outdoor compressor used by the outdoor unit are all variable frequency motors, and the outdoor fan and the outdoor compressor are driven after inversion of direct current voltage. Therefore, the outdoor controller 10 obtains a current instantaneous value of the outdoor unit by obtaining a dc side output current of the rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by obtaining a dc output terminal voltage of the rectifier bridge.
Further, the outdoor controller 10 calculates the active power P of the outdoor fan and the compressor according to the instantaneous current value of the outdoor unit and the instantaneous voltage value of the outdoor unitMOTOR。
The outdoor controller 10 is further configured to calculate an effective voltage value of the outdoor unit according to the instantaneous voltage value of the outdoor unit, and send the effective voltage value of the outdoor unit to the indoor controller 20.
Specifically, the outdoor controller 10 calculates an effective voltage value of the outdoor unit from instantaneous voltage values of the outdoor unit, and transmits the effective voltage value of the outdoor unit to the indoor controller 20. Because the voltage instantaneous value is the same as the input voltage instantaneous value of the whole machine, only the phase changes through the rectifier bridge, and therefore the voltage effective value is the same as the whole machine voltage effective value.
The indoor controller 20 is configured to obtain a motor rotation speed of the indoor fan, an angle of the air guide strip of the indoor unit, a temperature of the indoor heat exchanger, an indoor environment temperature, and an indoor environment humidity, and estimate an operating power of the indoor fan by establishing a power estimation model function associated with the motor rotation speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature, and the indoor environment humidity.
In one embodiment of the present invention, a power estimation model function associated with a motor rotation speed of an indoor fan, an angle of a wind guide strip of an indoor unit, a temperature of an indoor heat exchanger, an indoor ambient temperature, and an indoor ambient humidity is represented by equation (1). The F (n, A, T2) function is represented by formula (2), F11(x) The formula (3) represents G (T1, H) represents the formula (4).
The indoor controller 20 is further configured to use the temperature of the indoor heat exchanger, the operating power of the indoor fan, and the effective voltage value of the outdoor unit as first input variables, and model the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater.
Specifically, the influence on the PTC power during the use of the air conditioner mainly includes three main factors, namely, ambient temperature, voltage value, and air volume, and the three factors are directly related to the temperature of the evaporator T2 (i.e., the temperature of the indoor heat exchanger), the effective value of the input voltage (i.e., the effective value of the voltage of the outdoor unit), and the operating power of the outdoor fan.
The evaporator temperature T2 is the temperature closest to the PTC, and the larger the evaporator temperature T2 is, the smaller the required heat generation amount of the PTC is, i.e., the larger T2 is, the smaller the PTC operation power is, and conversely, the larger the PTC operation power is. The minimum value of the evaporator temperature T2 was set to 10 degrees celsius and the maximum value was 80 degrees celsius, encompassing the range in which T2 might occur; power P of indoor fanFANThe heat dissipation of the PTC is influenced, the higher the power is, the better the heat dissipation is, and the PTC can emit more heat to maintain the temperature, namely PFANThe larger the PTC operation power, the smaller the PTC operation power, on the contrary. Fan power PFANThe minimum value of (2) and the maximum value of (30) are taken as values; the effective voltage value U of the outdoor unit directly influences the heating power of the PTC, the larger the U is, the larger the PTC operation power is, and otherwise, the smaller the PTC operation power is. The minimum value of the PTC input voltage U effective value is 150V, the maximum value is 280V, and the voltage upper and lower limits which may appear in the power grid in China are limited.
More specifically, the above main influence factor is used as an input variable (i.e., the first input variable) to establish a data model between the PTC power level and the above main influence factor, which can be expressed as follows: y ═ f (u), where y represents the model output value, u is the respective input vector, and u ═ u (u ═ u)1,u2,...,um) The PTC real-time power value is input in a multi-dimension mode, the input variables are sampling values which mainly affect the PTC operation power, and the current PTC real-time power value can be obtained by inputting the sampling values into the software digital model of the invention.
In one embodiment of the present invention, the operating power of the PTC heater is estimated according to the model shown in equation (5).
In one embodiment of the present invention, in estimating the operating power of the PTC heater, the indoor controller 20 further takes the indoor ambient temperature, the indoor ambient humidity, and the angle of the air guide strip of the indoor unit as second input variables, and obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and adds the deviation compensation amount to the operating power of the PTC heater to perform compensation correction of the operating power of the PTC heater.
In particular, there are also secondary factors that affect PTC power, such as: the indoor environment temperature T1, the indoor environment humidity H, the angle A of the air guide strips and the like.
The indoor environment temperature T1 directly influences the magnitude of T2, so that the operation power of the PTC is indirectly influenced, the smaller T1 is, the smaller T2 is relatively smaller, so that the operation power of the PTC is larger, namely the smaller T1 is, the larger the operation power of the PTC is, and the smaller the operation power of the PTC is; the indoor environment humidity H can also influence the heat dissipation of the PTC, the larger the humidity is, the more the moisture in the air is, and more heat can be taken away when the air passes through the evaporator and the PTC, therefore, the larger the H is, the greater the operating power of the PTC can be, on the contrary, the operating power of the PTC becomes smaller, and certainly, the influence of the humidity is not obvious; the angle A of the air guide strip affects the structure of an air outlet of an air conditioner, when the air guide strip is positioned at a standard 90-degree angle, the air outlet quantity of the air duct is the largest, the heat dissipation is the best, when the air guide strip is positioned at 0 degree or 180 degrees, the air outlet is blocked by the air guide strip, the air outlet quantity of the air duct is the smallest, the heat dissipation is the worst, namely when the angle A is positioned at 90 degrees, the operation power of the PTC is the largest relative to other angles, and the deviation from 90.
In one embodiment of the present invention, the offset compensation amount is obtained according to equation (6).
The outdoor controller 10 and/or the indoor controller 20 performs an accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan, and operating power of the PTC heater to obtain total power of the air conditioner, and performs an integration operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
In one embodiment of the present invention, the indoor controller 20 also calculates the power of other loads in the indoor unit.
Specifically, the indoor controller 20 estimates power according to the operating state of the indoor controller 20 and the operating state of other loads, and the indoor controller includes a stepping motor in addition to the blower and the PTC, and mainly includes two states of operating and stopping, where the power is 2W in the operating state, 0W in the stopping state, 1.5W in the operating state, and 0.2W in the standby state.
In one embodiment of the present invention, the outdoor controller 10 also calculates the power of other loads in the outdoor unit.
Specifically, the outdoor controller 10 estimates the power according to the working state of the outdoor controller 10 and the working states of other loads, and the outdoor unit includes a four-way valve and an electronic expansion valve, which are mainly divided into two states of working and stopping, and the power in each state is substantially constant, the power of the four-way valve is 5W in the working state, the power of the four-way valve is 0W in the stopping state, the power of the electronic expansion valve is 3W in the working state, the power of the electronic expansion valve is 0W in the stopping state, the power of the electronic control board is 3W in the working state, and the power of the electronic control board is 0.5W in the standby state.
More specifically, the active power P to the outdoor fan and compressorMOTORAnd the running power P of the indoor fanFANAnd operating power P of the PTC heaterPTCAnd performing accumulation calculation on the power of other loads in the indoor unit and the power of other loads in the outdoor unit to obtain the total power of the air conditioner, and performing integral operation on the total power of the air conditioner to obtain the power consumption of the air conditioner.
In one embodiment of the present invention, the outdoor controller 10 and/or the indoor controller 20 may transmit the real-time power and power consumption information of the air conditioner to the mobile phone APP and the server for the user to query and analyze data.
According to the power consumption detection device of the air conditioner, the outdoor controller calculates the active power of the outdoor fan and the compressor, the indoor controller estimates the operating power of the indoor fan by establishing the power estimation model function, the indoor controller estimates the operating power of the PTC heater by modeling, and further obtains the total power of the air conditioner, so that the power consumption of the air conditioner is obtained, the device can accurately obtain the total power and the power consumption of the air conditioner without increasing any hardware cost, and the user experience is greatly improved.
In order to realize the embodiment, the invention further provides an air conditioner. The air conditioner comprises the power consumption detection device provided by the embodiment of the invention.
The air conditioner provided by the embodiment of the invention has the advantages that the total power and the power consumption of the air conditioner can be accurately obtained without increasing any hardware cost due to the power consumption detection device, so that the user experience is greatly improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. The method for detecting the power consumption of the air conditioner is characterized by comprising an indoor unit and an outdoor unit, wherein the indoor unit comprises an indoor controller, an indoor fan, an indoor heat exchanger and a PTC heater, the outdoor unit comprises an outdoor controller, an outdoor fan, a compressor and an outdoor heat exchanger, and the method for detecting the power consumption comprises the following steps:
the outdoor controller acquires a voltage instantaneous value and a current instantaneous value of the outdoor unit, and calculates active power of the outdoor fan and the compressor according to the voltage instantaneous value and the current instantaneous value of the outdoor unit;
the outdoor controller calculates the effective voltage value of the outdoor unit according to the instantaneous voltage value of the outdoor unit and sends the effective voltage value of the outdoor unit to the indoor controller;
the indoor controller acquires the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity, and estimates the operating power of the indoor fan by establishing a power estimation model function associated with the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity;
the indoor controller takes the temperature of the indoor heat exchanger, the operating power of the indoor fan and the effective voltage value of the outdoor unit as first input variables, and models the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater;
and performing accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan and operating power of the PTC heater to obtain total power of the air conditioner, and performing integral operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
2. The method as claimed in claim 1, wherein the outdoor controller obtains a current instantaneous value of the outdoor unit by detecting a dc side output current of a rectifier bridge in the outdoor unit, and obtains a voltage instantaneous value of the outdoor unit by detecting a dc output voltage of the rectifier bridge.
3. The method for detecting power consumption of an air conditioner according to claim 1, wherein the operation power of the PTC heater is estimated according to the following model:
y＝f2(∫Φ*f1(∫E*u+θ1)+θ2)
wherein u is the input vector after the normalization of the first input variable, E and phi are the weight parameter vector matrix of the first input variable in the model, and theta1And theta2Is the offset of the model, f1() And f2() Is an S-type function, y is a model output value, and f1() As a function of the processing of the input vector,σ in the formula, β andfor a given parameter, f2()＝f1() Is the processing function of the intermediate vector.
4. The method for detecting power consumption of an air conditioner according to claim 1, wherein the indoor controller takes the indoor ambient temperature, the indoor ambient humidity, and the angle of the air guide strip of the indoor unit as second input variables when estimating the operating power of the PTC heater, and obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and adds the deviation compensation amount to the operating power of the PTC heater to perform compensation correction of the operating power of the PTC heater.
5. The method of detecting power consumption of an air conditioner according to claim 4, wherein the offset compensation amount is obtained according to the following formula:
wherein, α1、α2、ρ1、ρ2、γ1、γ2Andfor the model parameters compensated and corrected by the pattern recognition method, T1, H and a are second input variables corresponding to the indoor ambient temperature, the indoor ambient humidity and the angle of the wind guide strip, Δ PPTCCompensating for the deviation.
6. The method of claim 1, wherein the power estimation model function associated with the motor speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor ambient temperature, and the indoor ambient humidity is expressed by the following equation:
P＝F(n，A，T2)+G(T1，H)
wherein,f11(x)＝a*x2+ b x + c, S2, S1 and d1 are matrix coefficients, d2, a, b and c are first constant coefficients, and u is a constant coefficient1Is a matrix [ n, A, T2]，G(T1,H)＝a1*T12+b1*T1+a2*H2+ b2 × H + c1+ c2, a1, b1, c1, a2, b2, and c2 are all second constant coefficients, n is the motor rotation speed of the indoor fan, T2 is the temperature of the indoor heat exchanger, T1 is the indoor ambient temperature, H is the indoor ambient humidity, and a is the angle of the air guide strip.
7. A power consumption detection device of an air conditioner is characterized in that the air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises an indoor fan, an indoor heat exchanger and a PTC heater, the outdoor unit comprises an outdoor fan, a compressor and an outdoor heat exchanger, the power consumption detection device comprises an outdoor controller and an indoor controller, wherein,
the outdoor controller is used for acquiring a voltage instantaneous value and a current instantaneous value of the outdoor unit and calculating active power of the outdoor fan and the compressor according to the voltage instantaneous value and the current instantaneous value of the outdoor unit;
the outdoor controller is further used for calculating a voltage effective value of the outdoor unit according to the voltage instantaneous value of the outdoor unit and sending the voltage effective value of the outdoor unit to the indoor controller;
the indoor controller is used for acquiring the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity, and estimating the operating power of the indoor fan by establishing a power estimation model function related to the motor rotating speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor environment temperature and the indoor environment humidity;
the indoor controller is further used for taking the temperature of the indoor heat exchanger, the operating power of the indoor fan and the effective voltage value of the outdoor unit as first input variables, and modeling the operating power of the PTC heater according to the first input variables to estimate the operating power of the PTC heater;
the outdoor controller and/or the indoor controller performs an accumulation calculation on active power of the outdoor fan and the compressor, operating power of the indoor fan and operating power of the PTC heater to obtain total power of the air conditioner, and performs an integration operation on the total power of the air conditioner to obtain power consumption of the air conditioner.
8. The apparatus of claim 7, wherein the outdoor controller obtains an instantaneous current value of the outdoor unit by detecting a dc side output current of a rectifier bridge of the outdoor unit, and obtains an instantaneous voltage value of the outdoor unit by detecting a dc output voltage of the rectifier bridge.
9. The apparatus for detecting power consumption of an air conditioner according to claim 7, wherein the operation power of the PTC heater is estimated according to the following model:
y＝f2(∫Φ*f1(∫E*u+θ1)+θ2)
wherein u is the input vector after the normalization of the first input variable, E and phi are the weight parameter vector matrix of the first input variable in the model, and theta1And theta2Is the offset of the model, f1() And f2() Is an S-type function, y is a model output value, and f1() As a function of the processing of the input vector,σ in the formula, β andfor a given parameter, f2()＝f1() Is the processing function of the intermediate vector.
10. The apparatus of claim 7, wherein the indoor controller further uses the indoor ambient temperature, the indoor ambient humidity, and an angle of a wind guide strip of the indoor unit as second input variables when estimating the operating power of the PTC heater, obtains a deviation compensation amount of the operating power of the PTC heater according to the second input variables, and adds the deviation compensation amount to the operating power of the PTC heater to perform compensation correction of the operating power of the PTC heater.
11. The apparatus for detecting electric power consumption of an air conditioner according to claim 10, wherein the offset compensation amount is obtained according to the following formula:
wherein, α1、α2、ρ1、ρ2、γ1、γ2Andfor the model parameters compensated and corrected by the pattern recognition method, T1, H and a are second input variables corresponding to the indoor ambient temperature, the indoor ambient humidity and the angle of the wind guide strip, Δ PPTCCompensating for the deviation.
12. The apparatus of claim 7, wherein the power estimation model function associated with the motor speed of the indoor fan, the angle of the air guide strip of the indoor unit, the temperature of the indoor heat exchanger, the indoor ambient temperature, and the indoor ambient humidity is expressed by the following equation:
P＝F(n，A，T2)+G(T1，H)
wherein,f11(x)＝a*x2+ b x + c, S2, S1 and d1 are matrix coefficients, d2, a, b and c are first constant coefficients, and u is a constant coefficient1Is a matrix [ n, A, T2]，G(T1,H)＝a1*T12+b1*T1+a2*H2+ b2 × H + c1+ c2, a1, b1, c1, a2, b2, and c2 are all second constant coefficients, n is the motor rotation speed of the indoor fan, T2 is the temperature of the indoor heat exchanger, T1 is the indoor ambient temperature, H is the indoor ambient humidity, and a is the angle of the air guide strip.
13. An air conditioner characterized by comprising the power consumption amount detection device according to any one of claims 7 to 12.
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| CN105509238A (en) * | 2015-12-18 | 2016-04-20 | 宁波奥克斯空调有限公司 | Real-time metering and query method for air conditioning electricity consumption |
| CN106347067B (en) * | 2016-07-29 | 2018-09-11 | 北京新能源汽车股份有限公司 | Electric automobile and control method and system for PTC electric heater of electric automobile |
| CN108107265A (en) * | 2017-11-21 | 2018-06-01 | 珠海格力电器股份有限公司 | Air conditioner power acquisition method and device, storage medium and air conditioner |
| CN109374963B (en) * | 2018-09-30 | 2021-09-28 | 四川长虹空调有限公司 | Air conditioner electric quantity calculation method |
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