CN105180345A - Air conditioner and power consumption detecting method and device of air conditioner - Google Patents
Air conditioner and power consumption detecting method and device of air conditioner Download PDFInfo
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- CN105180345A CN105180345A CN201510412411.6A CN201510412411A CN105180345A CN 105180345 A CN105180345 A CN 105180345A CN 201510412411 A CN201510412411 A CN 201510412411A CN 105180345 A CN105180345 A CN 105180345A
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Abstract
The invention discloses an air conditioner and a power consumption detecting method and device of the air conditioner. A PTC current detecting unit is added in an indoor unit of the air conditioner and used for detecting currents input to a PTC so that the active power of the PTC can be calculated. Meanwhile, the active power of the indoor unit is calculated according to the voltages and currents input to a motor of an indoor draught fan; and the active power of an outdoor draught fan and a compressor is calculated according to the voltage instantaneous value and the current instantaneous value output by the direct-current side of an outdoor unit rectifier. Finally, the active power of the PTC, the active power of the indoor draught fan and the active power of the outdoor draught fan and the compressor are accumulated to obtain an accumulated value, and power consumption of the air conditioner is calculated and obtained according to the accumulated value. According to the air conditioner and the power consumption detecting method and device, the cost problem of a special electric quantity module and the problem of low software estimation precision are solved, cost is saved, and the detection precision is improved.
Description
Technical field
The present invention relates to air-conditioner field, particularly relate to a kind of air-conditioner and power consumption detection method thereof and device.
Background technology
Along with the enhancing day by day that the universal of air-conditioner and user's energy-saving and emission-reduction are realized, user is more and more concerned about the power of air-conditioner and power consumption in the process of using air-condition device.Therefore, accurately and effectively the electricity consumption situation of air-conditioner is fed back to the direction that user becomes air-conditioner development.
In prior art, obtain power and the power consumption of air-conditioner mainly through following two kinds of methods.
1) electric power detection hardware is increased
Such as, special electricity detection module is increased at air-conditioner input, or increase voltage, current sensor to detect voltage, the current signal of air-conditioner input at air-conditioner input, and the power consumption of air-conditioner is calculated by MCU (MicroControllerUnit, micro-control unit).But the cost increase of the method is larger.
2) without the need to adding hardware, pure software calculates
In order to improve the power factor (PF) of air-conditioner, the off-premises station in existing air-conditioner has PFC (PowerFactorCorrection, PFC) circuit usually.By utilizing the voltage of pfc circuit, current detection circuit to obtain voltage, the current signal of off-premises station, and the power of off-premises station is calculated by MCU, then estimate the power of indoor set in conjunction with the operational mode of air-conditioner and operating mode, thus calculate power and the power consumption of air-conditioner.In the method, power due to indoor set is estimated value, particularly when the auxiliary thermal starting of electricity, because the power ratio of the auxiliary heat of electricity is higher, fluctuation ratio is larger, therefore, be difficult to the power estimating indoor set exactly, thus make the precision comparison of the power of the air-conditioner calculated and power consumption low, be difficult to the actual demand meeting user.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner and power consumption checkout gear, method and air-conditioner, is intended to solve the Cost Problems of prior art special electricity quantity module and the low problem of software estimation precision.
In order to achieve the above object, the invention provides a kind of power consumption checkout gear of air-conditioner, the power consumption checkout gear of described air-conditioner comprises: indoor detecting unit, indoor MCU unit, outdoor detecting unit, outdoor MCU unit; Wherein, described indoor detecting unit comprises:
Parameter of electric machine detecting unit, for detecting the voltage and current of the motor being input to indoor fan;
PTC current detecting unit, for detecting the real-time current being input to PTC;
Described indoor MCU unit is used for the voltage and current detected by described parameter of electric machine detecting unit, calculates the active power obtaining indoor fan; According to the voltage of alternating current being input to air-conditioner, and the real-time current of PTC detected by described PTC current detecting unit, calculate the active power obtaining PTC;
Described outdoor detecting unit comprises:
DC bus-bar voltage detecting unit, the instantaneous voltage that the DC side for detecting off-premises station rectifier bridge exports;
DC bus current detecting unit, the current instantaneous value that the DC side for detecting off-premises station rectifier bridge exports;
Described outdoor MCU unit is used for the instantaneous voltage that exports according to the DC side of described off-premises station rectifier bridge and current instantaneous value, calculates the active power of acquisition outdoor fan and compressor;
Described indoor MCU unit also for: the active power of the active power of the active power of described indoor fan, PTC, outdoor fan and compressor is added up, and calculates according to accumulation result and obtain air-conditioner power consumption.
Preferably, described indoor MCU unit also for: according to the duty of indoor set middle low power parts and indoor MCU unit, calculate the active power of small-power parts and indoor MCU unit, the power consumption for air-conditioner calculates; And/or,
Described outdoor MCU unit also for: according to the duty of off-premises station middle low power parts and outdoor MCU unit, calculate the active power of small-power parts and outdoor MCU unit, the power consumption for air-conditioner calculates.
Preferably, described PTC current detecting unit comprises current sensor, is connected with the PTC circuit connected in series of air-conditioner.
Preferably, described DC bus current detecting unit comprises the sampling resistor R1 being connected on rectifier bridge DC side, and described DC bus-bar voltage detecting unit comprises the first branch pressure voltage R2 and the second divider resistance R3 that are connected on rectifier bridge DC side.
Preferably, described parameter of electric machine detecting unit is used for: any two-phase in the motor three-phase current of sensing chamber's inner blower, and the DC bus-bar voltage of the motor of sensing chamber's inner blower and motor speed;
Described indoor MCU unit is used for: according to detected biphase current, calculates Q shaft current and the D shaft current of the motor obtaining indoor fan; According to Q shaft current and the D shaft current of the DC bus-bar voltage of the motor of motor speed, indoor fan, the motor of indoor fan, calculate the active power obtaining indoor fan.
Preferably, described indoor MCU unit is used for: according to the voltage of alternating current being input to air-conditioner, calculates the virtual value obtaining indoor set voltage; According to the PTC electric current detected by described PTC current detecting unit, calculate and obtain PTC current effective value; According to indoor set voltage effective value and PTC current effective value, calculate the active power obtaining described PTC.
In addition, for achieving the above object, present invention also offers a kind of air-conditioner, described air-conditioner comprises indoor set and off-premises station, wherein indoor set comprises indoor heat exchanger and indoor fan, described off-premises station comprises compressor, outdoor fan, outdoor heat exchanger, described air-conditioner also comprises the power consumption checkout gear of said structure, this power consumption checkout gear is for the active power of the active power and off-premises station that obtain indoor set, and according to the active power of indoor set and the active power of off-premises station, calculate the power consumption obtaining air-conditioner.
In addition, for achieving the above object, present invention also offers a kind of power consumption detection method of air-conditioner, comprise the following steps:
Obtain the voltage and current being input to the motor of indoor fan;
Obtain the electric current being input to PTC;
According to the voltage and current detected by described parameter of electric machine detecting unit, calculate the active power obtaining indoor fan;
According to the voltage of alternating current being input to air-conditioner, and the electric current of described PTC, calculate the active power obtaining PTC;
The instantaneous voltage that the DC side obtaining off-premises station rectifier bridge exports and current instantaneous value;
The instantaneous voltage exported according to the DC side of described off-premises station rectifier bridge and current instantaneous value, calculate the active power obtaining outdoor fan and compressor;
The active power of the active power of the active power of described indoor fan, PTC, outdoor fan and compressor is added up, and calculates according to accumulation result and obtain air-conditioner power consumption.
Preferably, the active power of the active power of the described active power to described indoor fan, PTC, outdoor fan and compressor adds up, and according to accumulation result calculate obtain air-conditioner power consumption before also comprise:
According to the duty of indoor set middle low power parts and indoor MCU unit, calculate the active power of indoor set small-power parts and indoor MCU unit; And/or,
According to the duty of off-premises station middle low power parts and outdoor MCU unit, calculate the active power of off-premises station small-power parts and outdoor MCU unit;
The active power of the active power of wherein said indoor set small-power parts and indoor MCU unit, described off-premises station small-power parts and outdoor MCU unit adds in described accumulation result, to calculate the power consumption obtaining air-conditioner.
Preferably, the voltage and current that described acquisition is input to the motor of indoor fan comprises: obtain any two-phase in the motor three-phase current of indoor fan, and obtains the DC bus-bar voltage of motor and the motor speed of indoor fan;
Described voltage and current detected by described parameter of electric machine detecting unit, calculates the active power obtaining indoor fan and comprises:
According to detected biphase current, calculate Q shaft current and the D shaft current of the motor obtaining indoor fan; According to Q shaft current and the D shaft current of the DC bus-bar voltage of the motor of motor speed, indoor fan, the motor of indoor fan, calculate the active power obtaining indoor fan.
Preferably, described basis is input to the voltage of the alternating current of air-conditioner, and the electric current of described PTC, calculates the active power obtaining PTC and comprises:
According to the voltage of alternating current being input to air-conditioner, calculate the virtual value obtaining indoor set voltage;
According to the PTC electric current detected by described PTC current detecting unit, calculate and obtain PTC current effective value;
According to indoor set voltage effective value and PTC current effective value, calculate the active power obtaining described PTC.
The embodiment of the present invention by being connected in series a current detecting unit on PTC, the accurate detection to PTC power can be realized, thus can by the power separate computations of the active power of indoor fan and PTC, and then achieve the power of indoor set and the power of off-premises station, and according to the power consumption of the power of indoor set and the power calculation air-conditioner of off-premises station.Therefore, the present invention solves the Cost Problems of special electricity quantity module and the low problem of software estimation precision well, has not only saved cost, but also has improve accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the high-level schematic functional block diagram of air conditioner control system of the present invention;
Fig. 2 is the refinement circuit diagram of outdoor detecting unit in air conditioner control system of the present invention;
Fig. 3 is the schematic flow sheet of power consumption detection method first embodiment of air-conditioner of the present invention;
Fig. 4 is the schematic flow sheet of power consumption detection method second embodiment of air-conditioner of the present invention;
Fig. 5 is the refinement schematic flow sheet calculating the active power of PTC in the power consumption detection method of air-conditioner of the present invention.
In order to make technical scheme of the present invention clearly, understand, be described in further detail below in conjunction with accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the Control system architecture of a kind of air-conditioner of the present invention is shown.This control system is run for controlling air-conditioner.This air-conditioner can comprise indoor set and off-premises station.Be provided with indoor heat exchanger, indoor fan in indoor set, in off-premises station, be provided with outdoor heat exchanger, outdoor fan, compressor, cross valve.The refrigerant pipeline of indoor set is communicated with the refrigerant pipeline of off-premises station by cross valve.
This control circuit divides two parts, and a part is the first control circuit 100 of indoor set, and a part is the second control circuit 200 of off-premises station.
Wherein, first control circuit 100 comprises indoor MCU unit 101, PTC load control unit 102, air-blower control unit 103, other load control units 104.Indoor MCU unit 101 carries out cooperation control for information such as the duty of the parameter that returns according to off-premises station and indoor set itself and temperature to whole air-conditioning.The control signal of PCT load control unit 102 for sending according to indoor MCU unit 101, the PTC heater controlling indoor set runs.The control signal of air-blower control unit 103 for sending according to indoor MCU unit 101, control room inner blower runs.The control signal that other load control units 104 send according to indoor MCU unit 101, controls other small-power parts ON/OFF.These other small-power parts can comprise stepper motor etc.
Second control circuit 200 comprises outdoor MCU unit 201, outdoor fan and driven compressor unit 202, other load control units 203, rectifier bridge 204.Wherein rectifier bridge 204 obtains direct current, for the driving of outdoor fan and compressor for carrying out rectification to AC power.Outdoor MCU unit 201, according to the control of indoor set and the status information of self, controls outdoor fan, compressor other load units together.Meanwhile, this outdoor MCU unit 201 also passes the information such as the state of off-premises station and outdoor temperature back indoor set.Outdoor fan and driven compressor unit 202, for the control instruction according to outdoor MCU control unit 201, control outdoor fan and compressor operating.Other load control units 203, for the control instruction according to outdoor MCU unit 201, control other small-power parts and run.These other small-power parts can comprise cross valve, electric expansion valve etc.
In order to the detection of the power and power consumption that realize air-conditioner, in above-mentioned control system, also comprise indoor detecting unit and outdoor detecting unit.Wherein, indoor detecting unit comprises parameter of electric machine detecting unit 1051, PTC current detecting unit 1052.Parameter of electric machine detecting unit 1051 is for detecting electric current and the voltage of the motor being input to indoor fan, and PTC current detecting unit 1052 is input to the real-time current of PTC for detecting.This value detected by indoor detecting unit 105 all will pass to indoor MCU unit 101, for indoor MCU unit 101 counting chamber inner blower power and PTC power.
Particularly, above-mentioned parameter of electric machine detecting unit 1051 comprises current detecting unit, voltage detection unit.Certainly, this parameter of electric machine detecting unit 1051 also can be one, can detect electric current and can detect voltage again.Current detecting unit detects any two-phase I in motor three-phase current
uand I
v, the Q shaft current I of motor is then calculated by formula (1) and formula (2) correspondence
qwith D shaft current I
d:
Wherein, θ is the turned position of motor.
Voltage detection unit detects the DC bus-bar voltage of motor, and the Q shaft current obtained according to the rotating speed of motor and above-mentioned calculating and D shaft current, utilize ensorless control mode, calculated the Q shaft voltage U of motor by formula (3) and formula (4)
qwith D shaft voltage U
d:
U
q=R*I
q+ L
q* p*I
q+ ω
r* L
d* I
d+ e
0formula (3)
U
d=R*I
d+ L
d* p*I
d-ω
r* L
q* I
qformula (4)
Wherein, R is electric motor resistance, L
qfor motor Q axle inductance, L
dfor motor D axle inductance, ω
rfor motor speed, p is differential operator, e
0for empty load of motor electromotive force.
Indoor MCU unit 101 is by the Q shaft voltage of motor, Q shaft current, and the D shaft voltage of motor, D shaft current substitute in formula (5), calculate the active power obtaining indoor fan:
P=U
q* I
q+ U
d* I
dformula (5)
Wherein, I
qfor Q shaft current, I
dfor D shaft current, U
qfor Q shaft voltage, U
dfor D shaft voltage.
Above-mentioned PTC current detecting unit 1052 is connected with PTC circuit connected in series, to detect the electric current of PTC.Indoor MCU unit 101 is according to the virtual value of indoor set voltage or the voltage effective value of off-premises station, and the current value of PTC, calculates the active power of PTC.Because PTC is purely resistive load, the therefore product of the virtual value of indoor set voltage and the current effective value of PTC, is the active power of PTC.UDC is DC bus-bar voltage,
Wherein, indoor MCU unit 101 calculates the virtual value of indoor dynamo-electric pressure according to formula (6), calculates the current effective value of PTC according to formula (7):
U
aC=(U
dC+ a*SPEED
fAN)/1.414 formula (6)
Wherein, U
aCfor indoor set voltage effective value or off-premises station voltage effective value; U
dCfor being input to the indoor DC bus-bar voltage of air-conditioner.Due to indoor fan close when, DC bus-bar voltage is 1.414 times of alternating voltage, blower fan open after DC bus-bar voltage some decline, therefore when calculating the virtual value of indoor dynamo-electric pressure, rotation speed of fan is compensated.A is penalty coefficient, SPEED
fANfor the rotating speed of indoor fan.
Wherein, I
rmsfor being input to the current effective value of PTC; i
(N)for being input to the PTC real-time voltage of air-conditioner, N is for detecting number of times.
Further, because the small-power parts in indoor set mainly comprise two states, such as duty and halted state, and power substantially constant under often kind of state, therefore indoor MCU unit is when calculating the active power of indoor set, not only distinguish the active power of counting chamber inner blower and the active power of PTC, but also by the on off state according to each small-power parts, calculate the active power of these small-power parts, thus make the active power of indoor fan, the active power of PTC, cumulative with the active power of small-power parts, obtain the active power of indoor set.
Further, above-mentioned outdoor detecting unit comprises DC bus-bar voltage detecting unit 2051, DC bus current detecting unit 2052.Wherein, the instantaneous voltage that DC bus-bar voltage detecting unit 2051 exports for the DC side detecting off-premises station rectifier bridge, the current instantaneous value that DC bus current detecting unit 2052 exports for the DC side detecting off-premises station rectifier bridge.
Particularly, as shown in Figure 2, above-mentioned DC bus current detecting unit 2052 can for being connected on the sampling resistor R1 of rectifier bridge DC side, detected the DC side output current of rectifier bridge in off-premises station by this sampling resistor R1, and obtain the current instantaneous value of off-premises station according to the DC side output current of rectifier bridge.Above-mentioned DC bus-bar voltage detecting unit 2051 can be the first divider resistance R2 of series connection and the second divider resistance R3, detected the DC output end voltage of rectifier bridge by this first divider resistance R2 and the second divider resistance R3, and obtain the instantaneous voltage of off-premises station according to the DC output end voltage of rectifier bridge.Certainly, in order to improve the power factor (PF) of air-conditioner, current most off-premises station all has PFC electric current, and pfc circuit needs collection front end input voltage and input current as closed-loop control reference quantity, and the voltage sampling circuit that the current sampling circuit of resistance R1 formation and the first divider resistance R2 of series connection and the second divider resistance R3 are formed is consistent with PFC sample circuit, therefore, when off-premises station has pfc circuit, the DC side output current of rectifier bridge and the DC output end voltage of rectifier bridge in off-premises station can be obtained by PFC sample circuit, and without the need to increasing hardware circuit.
The value that this DC bus-bar voltage detecting unit 2051 and DC bus current detecting unit 2052 detect all will be input to outdoor MCU unit 201, calculate the active power of blower fan and compressor in off-premises station for outdoor MCU unit 201.In this off-premises station, the active power of blower fan and compressor is the current instantaneous value of off-premises station and the product of instantaneous voltage.
Further, because off-premises station middle low power parts mainly comprise two states, i.e. duty and halted state, and power substantially constant under often kind of state, therefore when outdoor MCU unit 201 calculates the active power of off-premises station, also the duty according to these small-power parts is calculated the active power of these small-power parts, and blower fan in off-premises station and the active power of compressor, the active power of small-power parts are added up, obtain the active power of off-premises station.
The active power of the off-premises station of above-mentioned calculating and the active power of indoor set are added up, the active power of whole air-conditioner can be obtained, and then according to the active power of this whole air-conditioner, just can calculate the electricity that this air-conditioner consumes.
The embodiment of the present invention by being connected in series a current detecting unit on PTC, the accurate detection to PTC power can be realized, thus can by the power separate computations of the active power of indoor fan and PTC, and then achieve the power of indoor set and the power of off-premises station, and according to the power consumption of the power of indoor set and the power calculation air-conditioner of off-premises station.Therefore, the present invention solves the Cost Problems of special electricity quantity module and the low problem of software estimation precision well, has not only saved cost, but also has improve accuracy of detection.
Accordingly, the invention provides a kind of power consumption detection method of air-conditioner.As shown in Figure 3, the power consumption detection method of this air-conditioner comprises the following steps:
Step S110, obtain and be input to the voltage and current of the motor of indoor fan;
Step S120, obtain and be input to the electric current of PTC;
Step S130, voltage and current detected by described parameter of electric machine detecting unit, calculate the active power obtaining indoor fan;
Step S140, basis are input to the voltage of the alternating current of air-conditioner, and the electric current of described PTC, calculate the active power obtaining PTC;
The instantaneous voltage that step S150, the DC side obtaining off-premises station rectifier bridge export and current instantaneous value;
Step S160, the instantaneous voltage exported according to the DC side of described off-premises station rectifier bridge and current instantaneous value, calculate the active power obtaining outdoor fan and compressor;
The active power of step S170, active power, outdoor fan and compressor to the active power of described indoor fan, PTC adds up, and calculates according to accumulation result and obtain air-conditioner power consumption.
The embodiment of the present invention by being connected in series a current detecting unit on PTC, the accurate detection to PTC power can be realized, thus can by the power separate computations of the active power of indoor fan and PTC, and then achieve the power of indoor set and the power of off-premises station, and according to the power consumption of the power of indoor set and the power calculation air-conditioner of off-premises station.Therefore, the present invention solves the Cost Problems of special electricity quantity module and the low problem of software estimation precision well, has not only saved cost, but also has improve accuracy of detection.
Further, as shown in Figure 4, also comprise before above-mentioned steps S170:
Step S180, duty according to indoor set middle low power parts and indoor MCU unit, calculate the active power of indoor set small-power parts and indoor MCU unit; And/or,
Step S190, duty according to off-premises station middle low power parts and outdoor MCU unit, calculate the active power of off-premises station small-power parts and outdoor MCU unit;
The active power of the active power of wherein said indoor set small-power parts and indoor MCU unit, described off-premises station small-power parts and outdoor MCU unit adds in described accumulation result, to calculate the power consumption obtaining air-conditioner.
Because off-premises station middle low power parts mainly comprise two states, i.e. duty and halted state, and power substantially constant under often kind of state, therefore when outdoor MCU unit 201 calculates the active power of off-premises station, also the duty according to these small-power parts is calculated the active power of these small-power parts, and blower fan in off-premises station and the active power of compressor, the active power of small-power parts are added up, obtain the active power of off-premises station.
The active power of the off-premises station of above-mentioned calculating and the active power of indoor set are added up, the active power of whole air-conditioner can be obtained, and then according to the active power of this whole air-conditioner, just can calculate the electricity that this air-conditioner consumes.
Further, above-mentioned steps S110 comprises: obtain any two-phase in the motor three-phase current of indoor fan, and obtains the DC bus-bar voltage of motor and the motor speed of indoor fan;
Above-mentioned steps S130 comprises:
According to detected biphase current, calculate Q shaft current and the D shaft current of the motor obtaining indoor fan; According to Q shaft current and the D shaft current of the DC bus-bar voltage of the motor of motor speed, indoor fan, the motor of indoor fan, calculate the active power obtaining indoor fan.
Particularly, any two-phase I in motor three-phase current is first detected
uand I
v, the Q shaft current I of motor is then calculated by formula (1) and formula (2) correspondence
qwith D shaft current I
d:
Wherein, θ is the turned position of motor.
Then, detect the DC bus-bar voltage of motor, and the Q shaft current obtained according to rotating speed and the above-mentioned calculating of motor and D shaft current, utilize ensorless control mode, by the Q shaft voltage U of formula (3) and formula (4) calculating motor
qwith D shaft voltage U
d:
U
q=R*I
q+ L
q* p*I
q+ ω
r* L
d* I
d+ e
0formula (3)
U
d=R*I
d+ L
d* p*I
d-ω
r* L
q* I
qformula (4)
Wherein, R is electric motor resistance, L
qfor motor Q axle inductance, L
dfor motor D axle inductance, ω
rfor motor speed, p is differential operator, e
0for empty load of motor electromotive force.
Indoor MCU unit 101 is by the Q shaft voltage of motor, Q shaft current, and the D shaft voltage of motor, D shaft current substitute in formula (5), calculate the active power obtaining indoor fan:
P=U
q* I
q+ U
d* I
dformula (5)
Wherein, I
qfor Q shaft current, I
dfor D shaft current, U
qfor Q shaft voltage, U
dfor D shaft voltage.
As shown in Figure 5, above-mentioned steps S140 comprises:
Step S141, basis are input to the voltage of the alternating current of air-conditioner, calculate the virtual value obtaining indoor set voltage;
Step S142, PTC electric current detected by described PTC current detecting unit, calculate and obtain PTC current effective value;
Step S143, according to indoor set voltage effective value and PTC current effective value, calculate and obtain the active power of described PTC.
Because PTC is purely resistive load, the therefore product of the virtual value of indoor set voltage and the current effective value of PTC, is the active power of PTC.
Wherein, indoor MCU unit 101 calculates the virtual value of indoor dynamo-electric pressure according to formula (6), calculates the current effective value of PTC according to formula (7):
U
aC=(U
dC+ a*SPEED
fAN)/1.414 formula (6)
Wherein, U
aCfor indoor set voltage effective value or off-premises station voltage effective value; U
dCfor being input to the indoor DC bus-bar voltage of air-conditioner.Due to indoor fan close when, DC bus-bar voltage is 1.414 times of alternating voltage, blower fan open after DC bus-bar voltage some decline, therefore when calculating the virtual value of indoor dynamo-electric pressure, rotation speed of fan is compensated.A is penalty coefficient, SPEED
fANfor the rotating speed of indoor fan.
Wherein, I
rmsfor being input to the current effective value of PTC; i
(N)for being input to the PTC real-time voltage of air-conditioner, N is for detecting number of times.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a power consumption checkout gear for air-conditioner, is characterized in that, the power consumption checkout gear of described air-conditioner comprises: indoor detecting unit, indoor MCU unit, outdoor detecting unit, outdoor MCU unit; Wherein, described indoor detecting unit comprises:
Parameter of electric machine detecting unit, for detecting real-time voltage and the real-time current of the motor being input to indoor fan;
PTC current detecting unit, for detecting the real-time current being input to PTC;
Described indoor MCU unit, for the real-time voltage detected by described parameter of electric machine detecting unit and real-time current, calculates the active power obtaining indoor fan; According to the voltage of alternating current being input to air-conditioner, and the real-time current of PTC detected by described PTC current detecting unit, calculate the active power obtaining PTC;
Described outdoor detecting unit comprises:
DC bus-bar voltage detecting unit, the instantaneous voltage that the DC side for detecting off-premises station rectifier bridge exports;
DC bus current detecting unit, the current instantaneous value that the DC side for detecting off-premises station rectifier bridge exports;
Described outdoor MCU unit is used for the instantaneous voltage that exports according to the DC side of described off-premises station rectifier bridge and current instantaneous value, calculates the active power of acquisition outdoor fan and compressor;
Described indoor MCU unit also for: the active power of the active power of the active power of described indoor fan, PTC, outdoor fan and compressor is added up, and calculates according to accumulation result and obtain air-conditioner power consumption.
2. the power consumption checkout gear of air-conditioner as claimed in claim 1, it is characterized in that, described indoor MCU unit also for: according to the duty of indoor set middle low power parts and indoor MCU unit, calculate the active power of small-power parts and indoor MCU unit, the power consumption for air-conditioner calculates; And/or,
Described outdoor MCU unit also for: according to the duty of off-premises station middle low power parts and outdoor MCU unit, calculate the active power of small-power parts and outdoor MCU unit, the power consumption for air-conditioner calculates.
3. the power consumption checkout gear of air-conditioner as claimed in claim 1, it is characterized in that, described PTC current detecting unit comprises current sensor, is connected with the PTC circuit connected in series of air-conditioner.
4. the power consumption checkout gear of air-conditioner as claimed in claim 3, it is characterized in that, described DC bus current detecting unit comprises the sampling resistor R1 being connected on rectifier bridge DC side, and described DC bus-bar voltage detecting unit comprises the first branch pressure voltage R2 and the second divider resistance R3 that are connected on rectifier bridge DC side.
5. the power consumption checkout gear of the air-conditioner as described in any one of claim 1-4, it is characterized in that, described parameter of electric machine detecting unit is used for: any two-phase in the motor three-phase current of sensing chamber's inner blower, and the DC bus-bar voltage of the motor of sensing chamber's inner blower and motor speed;
Described indoor MCU unit 101 for: according to detected biphase current, calculate the Q shaft current of motor and D shaft current that obtain indoor fan; According to Q shaft current and the D shaft current of the DC bus-bar voltage of the motor of motor speed, indoor fan, the motor of indoor fan, calculate the active power obtaining indoor fan.
6. the power consumption checkout gear of air-conditioner as claimed in claim 3, it is characterized in that, described indoor MCU unit is used for: according to the voltage of alternating current being input to air-conditioner, calculate the virtual value obtaining indoor set voltage; According to the PTC electric current detected by described PTC current detecting unit, calculate and obtain PTC current effective value; According to indoor set voltage effective value and PTC current effective value, calculate the active power obtaining described PTC.
7. an air-conditioner, described air-conditioner comprises indoor set and off-premises station, wherein indoor set comprises indoor heat exchanger and indoor fan, described off-premises station comprises compressor, outdoor fan, outdoor heat exchanger, it is characterized in that, described air-conditioner also comprises the power consumption checkout gear as described in any one of claim 1-6, this power consumption checkout gear is for the active power of the active power and off-premises station that obtain indoor set, and according to the active power of indoor set and the active power of off-premises station, calculate the power consumption obtaining air-conditioner.
8. a power consumption detection method for air-conditioner, is characterized in that, the power consumption detection method of described air-conditioner comprises the following steps:
Obtain the voltage and current being input to the motor of indoor fan;
Obtain the electric current being input to PTC;
According to the voltage and current detected by described parameter of electric machine detecting unit, calculate the active power obtaining indoor fan;
According to the voltage of alternating current being input to air-conditioner, and the electric current of described PTC, calculate the active power obtaining PTC;
The instantaneous voltage that the DC side obtaining off-premises station rectifier bridge exports and current instantaneous value;
The instantaneous voltage exported according to the DC side of described off-premises station rectifier bridge and current instantaneous value, calculate the active power obtaining outdoor fan and compressor;
The active power of the active power of the active power of described indoor fan, PTC, outdoor fan and compressor is added up, and calculates according to accumulation result and obtain air-conditioner power consumption.
9. the power consumption detection method of air-conditioner as claimed in claim 8, it is characterized in that, the active power of the active power of the described active power to described indoor fan, PTC, outdoor fan and compressor adds up, and according to accumulation result calculate obtain air-conditioner power consumption before also comprise:
According to the duty of indoor set middle low power parts and indoor MCU unit, calculate the active power of indoor set small-power parts and indoor MCU unit; And/or,
According to the duty of off-premises station middle low power parts and outdoor MCU unit, calculate the active power of off-premises station small-power parts and outdoor MCU unit;
The active power of the active power of wherein said indoor set small-power parts and indoor MCU unit, described off-premises station small-power parts and outdoor MCU unit adds in described accumulation result, to calculate the power consumption obtaining air-conditioner.
10. the power consumption detection method of air-conditioner as claimed in claim 8, it is characterized in that, the voltage and current that described acquisition is input to the motor of indoor fan comprises: obtain any two-phase in the motor three-phase current of indoor fan, and obtains the DC bus-bar voltage of motor and the motor speed of indoor fan;
Described voltage and current detected by described parameter of electric machine detecting unit, calculates the active power obtaining indoor fan and comprises:
According to detected biphase current, calculate Q shaft current and the D shaft current of the motor obtaining indoor fan; According to Q shaft current and the D shaft current of the DC bus-bar voltage of the motor of motor speed, indoor fan, the motor of indoor fan, calculate the active power obtaining indoor fan.
The power consumption detection method of 11. air-conditioners as claimed in claim 8, it is characterized in that, described basis is input to the voltage of the alternating current of air-conditioner, and the electric current of described PTC, calculates the active power obtaining PTC and comprises:
According to the voltage of alternating current being input to air-conditioner, calculate the virtual value obtaining indoor set voltage;
According to the PTC electric current detected by described PTC current detecting unit, calculate and obtain PTC current effective value;
According to indoor set voltage effective value and PTC current effective value, calculate the active power obtaining described PTC.
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