CN103675435B - Frequency-variable air conditioner outdoor machine and the self-checking system of complete machine power consumption thereof and method - Google Patents
Frequency-variable air conditioner outdoor machine and the self-checking system of complete machine power consumption thereof and method Download PDFInfo
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Abstract
The invention belongs to refrigeration plant detection control field, particularly relate to a kind of frequency-variable air conditioner outdoor machine and the self-checking system of complete machine power consumption thereof and method.Frequency-variable air conditioner outdoor machine that the embodiment of the present invention provides and the self-checking system of complete machine power consumption and method, only need to increase several for detecting U on hardwarebdDivider resistance, just may utilize that convertible frequency air-conditioner is existing active or the sampling resistor in part active PFC (power factor compensation) circuit and the MCU on indoor, off-premises station electric-controlled plate, realize convertible frequency air-conditioner complete machine power consumption and the detection of indoor set, off-premises station each power consumption, low cost and precision are higher, it is possible to effectively solve high cost present in existing air-conditioner power consumption detecting system and method or the inadequate problem of precision.
Description
Technical field
The invention belongs to refrigeration plant detection control field, particularly relate to a kind of frequency-variable air conditioner outdoor machine and complete machine consumption thereof
The self-checking system of power and method.
Background technology
Along with people's raising day by day to energy problem's attention degree, household electrical appliance energy-conservation aspect requirement the most increasingly
High.Air-conditioning is as the bigger household electrical appliance of power consumption, and its power consumption is particularly subject to the concern of user.To this end, many air-conditioning factories
Family using power consumption as the foundation of regulation machine running status, or the display screen by power consumption and output of power consumption to air-conditioning
Upper so that user monitoring.
Existing air conditioning system maker proposes a kind of basis and records the electricity consumption that idle call electricity is controlled by power consumption
Amount control device, this device just contains the detection module to power consumption；Separately there is the air-conditioner that a kind of carried charge shows, this sky
Device is adjusted to add the module of power detection in power supply input, and the display of the power recorded with output of power consumption to air-conditioner
On screen.The power consumption of the method energy accurately measure air-conditioner complete machine, but add extra power detection module, significantly
Add the cost of complete machine.
Also having a kind of air-conditioner that can show power consumption and power consumption, this air-conditioner is mutual with electric current by voltage transformer
Sensor measures the consumption electric current of supply voltage and complete machine, and accordingly by the MCU of indoor set calculate complete machine power consumption with
Power consumption.Its power calculation mode is relevant with power factor, but the magnitude of voltage recorded with voltage transformer summation current transformer with
Current value is difficult to calculate power factor accurately, and therefore the computational accuracy of its power consumption will be greatly affected.This
Outward, owing to adding voltage transformer and current transformer, complete machine cost also to increase.
Summary of the invention
It is an object of the invention to provide the self-checking system of a kind of frequency-variable air conditioner outdoor machine power consumption, its testing cost is low
And precision is higher, it is possible to solve high cost or inadequate the asking of precision present in above-mentioned existing detecting system and method
Topic.
To achieve these goals, the technical solution adopted in the present invention is:
The self-checking system of a kind of frequency-variable air conditioner outdoor machine power consumption, with the rectifier bridge DC side outfan phase of alternating current power supply
Even, it is characterised in that the self-checking system of described off-premises station power consumption includes:
It is connected between described rectifier bridge the first DC side outfan and ground, is used for detecting the output of described rectifier bridge DC side
The noninductive resistance R1 of end current value；
It is connected between described rectifier bridge the second DC side outfan and ground, is used for detecting the output of described rectifier bridge DC side
The divider resistance R2 and divider resistance R3 of terminal voltage value；
It is connected to one end that described noninductive resistance R1 and rectifier bridge the first DC side outfan connect altogether and described point
One end that piezoresistance R2 and divider resistance R3 connects altogether, be used for obtaining described rectifier bridge DC side output end current value and magnitude of voltage,
The off-premises station electric-controlled plate MCU of described off-premises station power consumption is determined by calculating.
The present invention also aims to provide the self-checking system of a kind of convertible frequency air-conditioner complete machine power consumption, native system includes
The self-checking system of above-mentioned off-premises station power consumption, particularly as follows:
The self-checking system of a kind of convertible frequency air-conditioner power consumption, it is characterised in that the self-inspection of described convertible frequency air-conditioner power consumption
System includes:
It is connected between described rectifier bridge the first DC side outfan and ground, is used for detecting the output of described rectifier bridge DC side
The noninductive resistance R1 of end current value；
It is connected between described rectifier bridge the second DC side outfan and ground, is used for detecting the output of described rectifier bridge DC side
The divider resistance R2 and divider resistance R3 of terminal voltage value；
It is connected to one end that described noninductive resistance R1 and rectifier bridge the first DC side outfan connect altogether and described point
One end that piezoresistance R2 and divider resistance R3 connects altogether, be used for obtaining described rectifier bridge DC side output end current value and magnitude of voltage,
The voltage effective value of alternating current power supply and described off-premises station power consumption is determined by calculating, and by serial communication mode by outdoor
The voltage effective value of machine power consumption and alternating current power supply passes to the off-premises station electric-controlled plate MCU of indoor set；
Receive the data of described off-premises station electric-controlled plate MCU transmission, in conjunction with the mode of operation of described convertible frequency air-conditioner, according to presetting
The mapping relations of indoor set power consumption determine described indoor set power consumption, and calculate described convertible frequency air-conditioner power consumption
Indoor set electric-controlled plate MCU.
The purpose of the present invention lies also in the inspection providing a kind of self-checking system based on above-mentioned convertible frequency air-conditioner complete machine power consumption
Survey method, specifically includes following steps:
Off-premises station electric-controlled plate MCU detects the voltage drop on described noninductive resistance R1, straight by calculating the described rectifier bridge of acquisition
The current value I of stream side outfanbd；
Off-premises station electric-controlled plate MCU detects the voltage drop on described divider resistance R3, straight by calculating the described rectifier bridge of acquisition
The magnitude of voltage U of stream side outfanbd；
Off-premises station electric-controlled plate MCU is calculated power consumption P of off-premises station according to preset relation formulaoutdoorAnd alternating current
It is pressed with valid value UrmsAnd pass to indoor set electric-controlled plate MCU；
Indoor set electric-controlled plate MCU receives the data of described off-premises station electric-controlled plate MCU transmission, in conjunction with the work of described convertible frequency air-conditioner
Operation mode, determines described indoor set power consumption P according to the mapping relations of default indoor set power consumptionindoor, and calculate
Described convertible frequency air-conditioner power consumption Pwhole。
The present invention provide the self-checking system of a kind of convertible frequency air-conditioner power consumption, method and off-premises station power consumption thereof from
Check system, testing cost is low and precision is higher, it is possible to solve to exist in existing air-conditioner power consumption detecting system and method
High cost or the inadequate problem of precision.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the frequency-variable air conditioner outdoor machine power consumption self-checking system that first embodiment of the invention provides；
Fig. 2 is the structure diagram of the self-checking system of the convertible frequency air-conditioner complete machine power consumption that second embodiment of the invention provides；
Fig. 3 is the convertible frequency air-conditioner power consumption self-inspection system of providing based on the second embodiment of providing of third embodiment of the invention
The flowchart of the detection method of system.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
The present invention provide the self-checking system of a kind of convertible frequency air-conditioner power consumption, method and off-premises station power consumption thereof from
Check system, testing cost is low and precision is higher, it is possible to solve to exist in existing air-conditioner power consumption detecting system and method
High cost or the inadequate problem of precision.
Embodiment one:
Fig. 1 is the structure diagram of the frequency-variable air conditioner outdoor machine power consumption self-checking system that first embodiment of the invention provides；
For convenience of description, illustrate only part related to the present embodiment, as shown in the figure:
The self-checking system of a kind of frequency-variable air conditioner outdoor machine power consumption, with the rectifier bridge DC side outfan of alternating current power supply AC
It is connected, and connects with other frequency conversion interlock circuits, including:
It is connected between rectifier bridge the first DC side outfan and ground, is used for detecting rectifier bridge DC side output end current value
IbdNoninductive resistance R1；
It is connected between rectifier bridge the second DC side outfan and ground, is used for detecting rectifier bridge DC side output end voltage value
UbdDivider resistance R2 and divider resistance R3；
It is connected to one end and divider resistance R2 that noninductive resistance R1 connects altogether with rectifier bridge the first DC side outfan
The one end connect altogether with divider resistance R3, is used for obtaining rectifier bridge DC side output end current value IbdWith magnitude of voltage Ubd, by calculate
Determine off-premises station power consumption PoutdoorOff-premises station electric-controlled plate MCU.
The frequency-variable air conditioner outdoor machine power consumption self-checking system that this first embodiment provides, it is possible to use off-premises station electric-controlled plate
MCU detects following two physical quantity: one is the magnitude of voltage U of rectifier bridge DC side outfanbd；Another is to flow through rectifier bridge
The current value I of outfanbd.Wherein, UbdRectification bridge output end can be connected to and with reference to several strings between ground by MCU detection
Magnitude of voltage on connection divider resistance, and carry out calculating and determine, as the presently preferred embodiments, the most only select two divider resistance R2
And R3；And IbdCan be connected with reference to the voltage drop of noninductive resistance R1 between ground and rectifier bridge DC side outfan by MCU detection, and
Carry out calculating to determine.
On the other hand, noninductive resistance R1 herein be equivalent to that frequency-variable air conditioner outdoor machine is active or the active PFC of part (power because of
Number compensates) sampling resistor in circuit, general convertible frequency air-conditioner all contains these parts, therefore, for IbdDetection in general feelings
Without increasing new hardware under condition.
Understanding in sum, the frequency-variable air conditioner outdoor machine power consumption self-checking system that this first embodiment provides is on hardware
Only need to increase several for detecting UbdDivider resistance, as preferably, also have only to increase corresponding rc filter circuit
Realizing, cost is relatively low.MCU records UbdWith IbdAfterwards, the power consumption of off-premises station can be determined by multiplication computing formula
Poutdoor。
Additionally, as additional function, off-premises station electric-controlled plate MCU also can be according to the electricity of the rectifier bridge DC side outfan obtained
Pressure value UbdCalculate the voltage effective value U of alternating current power supplyrms, and by serial communication mode by off-premises station power consumption Poutdoor
And the voltage effective value U of alternating current power supplyrmsPass to the MCU of indoor set electric-controlled plate.
Embodiment two:
Fig. 2 is the structure diagram of the self-checking system of the convertible frequency air-conditioner complete machine power consumption that second embodiment of the invention provides；
For convenience of description, illustrate only part related to the present embodiment.
The self-checking system of the convertible frequency air-conditioner power consumption that the present embodiment provides includes that the off-premises station that first embodiment provides disappears
Wasted work rate self-checking system, i.e. noninductive resistance R1, divider resistance R2, divider resistance R3 and off-premises station electric-controlled plate MCU, also include one
With the indoor set electric-controlled plate MCU that off-premises station electric-controlled plate MCU carries out serial communication；
Wherein, noninductive resistance R1 is connected between rectifier bridge the first DC side outfan and ground, is used for detecting rectifier bridge straight
Stream side output end current value Ibd；Divider resistance R2 and divider resistance R3 is connected on rectifier bridge the second DC side outfan and ground
Between, it is used for detecting rectifier bridge DC side output end voltage value Ubd, two inputs of off-premises station electric-controlled plate MCU connect respectively without electrification
One end that resistance R1 and rectifier bridge the first DC side outfan connect altogether and one end that divider resistance R2 and divider resistance R3 connects altogether, use
In obtaining described rectifier bridge DC side output end current value IbdWith magnitude of voltage Ubd, determined that by calculating the voltage of alternating current power supply has
Valid value UrmsAnd off-premises station power consumption Poutdoor, determine that the voltage effective value of alternating current power supply and described off-premises station disappear by calculating
Wasted work rate, and by serial communication mode by alternating voltage virtual value UrmsAnd off-premises station power consumption PoutdoorPass to indoor
Machine；The above-mentioned data of indoor set electric-controlled plate MCU receiving chamber outer Electrical Control plate MCU transmission, in conjunction with the real time operation mould of convertible frequency air-conditioner
Formula, determines indoor set power consumption P according to the mapping relations of default indoor set power consumptionindoor, and calculate convertible frequency air-conditioner
Complete machine power consumption Pwhole.Convertible frequency air-conditioner complete machine power consumption PwholeIt is represented by:
Pwhole=Pindoor+Poutdoor (1)
In this preferred embodiment, alternating current power supply AC as shown in Figure 1 is through indoor set relay and indoor set power supply
(i.e. civil power) is connected, and the alternating voltage virtual value that therefore off-premises station electric-controlled plate MCU can be detected is considered as the alternating current of indoor set
It is pressed with valid value Urms.When implementing, because major part convertible frequency air-conditioner all has power back-off control (PFC) circuit at present, should
The PFC current sampling resistor that circuit is comprised is consistent with aforesaid noninductive resistance R1 function, can directly serve as noninductive resistance R1, from
And save the Analog-digital Converter port of a current sampling resistor and off-premises station electric-controlled plate MCU.And flow through rectifier bridge DC side
The electric current I of outfanbdCan produce size at noninductive resistance R1 two ends is UAD1=IbdThe magnitude of voltage of R1, the value of noninductive resistance R1
Need to ensure UAD1Within the input voltage range that off-premises station electric-controlled plate MCU Analog-digital Converter port is allowed.Divider resistance R2
With R3 for detecting the magnitude of voltage U of rectifier bridge DC side outfanbd, therefore the value of divider resistance R2 and R3 needs to ensure to pass through
Magnitude of voltage after voltage division processing, the magnitude of voltage U of the end that i.e. divider resistance R2 and R3 connects altogetherAD2=UbdR3/ (R2+R3), also
Should be within the input voltage range that off-premises station electric-controlled plate MCU Analog-digital Converter port is allowed.When outdoor plate MCU detects
UAD1With UAD2Afterwards, IbdWith UbdCan be tried to achieve by following formula:
Again via a multiplier and the first low pass filter, can directly calculate frequency-variable air conditioner outdoor machine power consumption
Poutdoor.And pass through UbdThe peak value U in a time interval TcbdpDivided byTry to achieve alternating voltage virtual value Urms, and
By serial communication mode, above-mentioned two data are passed to the MCU of indoor set electric-controlled plate.
As the presently preferred embodiments, the self-checking system of above-mentioned convertible frequency air-conditioner power consumption also includes one for showing frequency conversion
Air conditioner power consumption PwholeDisplay device.
When implementing, display device connects with the MCU of indoor set electric-controlled plate, is calculated by the MCU of indoor set electric-controlled plate
Indoor set power consumption P obtainedindoorWith complete machine power consumption PwholeShow, be used with standby user examination.
It should be noted that the present embodiment is of the self-checking system to convertible frequency air-conditioner power consumption of the present invention
Plant preferred example to enumerate, do not limit protection scope of the present invention.
Embodiment three:
Fig. 3 is the convertible frequency air-conditioner power consumption self-inspection system of providing based on the second embodiment of providing of third embodiment of the invention
The flowchart of the detection method of system；For convenience of description, illustrate only part related to the present embodiment.
The detection method of the convertible frequency air-conditioner power consumption self-checking system that the present embodiment provides includes:
In step S301, the voltage drop on off-premises station electric-controlled plate MCU detection noninductive resistance R1, obtain rectification by calculating
The current value I of bridge DC side outfanbd；
In step s 302, the voltage drop on off-premises station electric-controlled plate MCU detection divider resistance R3, obtain rectification by calculating
The magnitude of voltage U of bridge DC side outfanbd；
In step S303, off-premises station electric-controlled plate MCU is calculated the power consumption of off-premises station according to preset relation formula
PoutdoorAnd alternating voltage virtual value Urms, and pass to indoor set electric-controlled plate MCU；
In step s 304, the data of indoor set electric-controlled plate MCU receiving chamber outer Electrical Control plate MCU transmission, empty in conjunction with frequency conversion
The mode of operation adjusted, determines indoor set power consumption P according to the mapping relations of default indoor set power consumptionindoor, and calculate
Go out convertible frequency air-conditioner complete machine power consumption Pwhole。
When implementing, as the presently preferred embodiments, in step S303 off-premises station electric-controlled plate MCU according to preset relation formula meter
Calculate power consumption P obtaining off-premises stationoutdoorAnd alternating voltage virtual value UrmsIn preset relation formula particularly as follows:
Wherein, T is power consumption P calculating off-premises stationoutdoorWith alternating voltage virtual value UrmsTwo digital lowpasses used
The update cycle of wave filter, TpWith TuIt is respectively above-mentioned two filter time constant, the time of above-mentioned two low pass filter
Constant TpWith TuChoose and need to meet following two condition: frequency-variable air conditioner outdoor machine power consumption P of (1) wave filter outputoutdoor
With alternating voltage virtual value UrmsHarmonic components within the acceptable range；(2) wave filter output can be with sufficiently fast speed
Change to power consumption with alternating voltage virtual value is made a response.It is exemplified below: if the update cycle T=of digital filter
1ms, the most desirable Tp=1s and Tu=0.5s.UbdpMagnitude of voltage U for rectifier bridge DC side outfanbdSample in each self-inspection
Time interval TcInterior peak value, (k) and (k-1) represent that variable is dynamo-electric by outdoor with k-1 sampling instant in kth respectively
Control value acquired in plate MCU.Alternating voltage virtual value UrmsCan be by UbdAt a time interval TcInterior peak value UbdpDivided byTry to achieve.For the electric main of 50Hz, TcValue between desirable 10ms to 20ms.
On the other hand, when implementing, the peak value U of rectifier bridge output voltagebdp(i.e. UbdAt a time interval Tc
Interior peak value) can be determined by following detection algorithm flow process.
In step S401, initialize predeterminated voltage peak value Ubdp0For 311V；
In step S402, read the real-time voltage U of rectifier bridge DC side outfanbd；
In step S403, relatively initialized voltage peak Ubdp0With real-time voltage UbdSize, if Ubdp0Less than Ubd,
Then update the instant peak value U of alternating voltagebdp=Ubd；If Ubdp0Not less than Ubd, then the instant peak value U of alternating voltage is keptbdpFor
The U presetbdp0；
In step s 404, through sampling time section Tc, then read the real-time voltage of rectifier bridge DC side outfan
Ubd；
In step S405, relatively instant voltage peak UbdpWith real-time voltage UbdSize, if UbdpLess than Ubd, the most more
The instant peak value U of new alternating voltagebdp=Ubd；If UbdpNot less than Ubd, then the instant peak value U of alternating voltage is keptbdpConstant.
So, every a sampling time interval TcJust obtain the real-time voltage U of a rectifier bridge DC side outfanbd,
And with the instant peak value U of alternating voltagebdpCompare, if real-time voltage UbdMore than instant peak value Ubdp, then instant peak value is updated
UbdpValue be real-time voltage UbdIf, real-time voltage UbdLess than or equal to instant peak value Ubdp, the most it is not updated instant peak value
UbdpOperation；Above-mentioned steps circulation is carried out, until user stops using convertible frequency air-conditioner, it is not necessary to calculation consumption power again.Below
Citing is briefly described:
Assume to take Tc=10ms, then determine U in 0 to 10ms intervalbdMaximum be 300.5V, according to listed above
Formula (3) can obtain UbdP=300.5V, Urms0=212.5V；Then U is determined at this sampling interval of 10ms to 20msbd's
Maximum is 302.1V, then according to (3) formula, and UbdP and Urms0 is updated to U the most respectivelybdp=302.1V, Urms0=213.6V；According to this
Analogize.
Power consumption P of the calculated off-premises station of off-premises station electric-controlled plate MCUoutdoorAnd alternating voltage virtual value Urms,
Indoor set electric-controlled plate MCU can be passed to by the serial communication mode between indoor set and off-premises station.
In above-mentioned steps S304, the data of indoor set electric-controlled plate MCU receiving chamber outer Electrical Control plate MCU transmission, in conjunction with becoming
Frequently the mode of operation of air-conditioning, determines indoor set power consumption P according to the mapping relations of default indoor set power consumptionindoor, and
Calculate convertible frequency air-conditioner complete machine power consumption Pwhole。
This step is when implementing, and the mode of operation that first indoor set electric-controlled plate MCU reads indoor set current is work
One in set of modes S, wherein S={M1, M2 ... Mn} is the set of the mode of operation that convertible frequency air-conditioner is preset, each work
Corresponding a pair indoor set power consumption design factor A and B under operation mode.According to the mode of operation determined, process of tabling look-up obtains pre-
If indoor set power consumption design factor A and B, then, indoor set electric-controlled plate MCU is automatically controlled with by off-premises station according to coefficient A, B
Alternating voltage virtual value U that plate MCU passes overrms, the power consumption of indoor set is calculated by formula listed below (4)
Pindoor。
Pindoor=AUrms+B (4)
It is briefly described as follows indoor set mode of operation set S={M1, M2 ... how Mn} sets.It is exemplified below: set indoor
Machine includes the critical piece of auxiliary hot three power consumptions of wind guide strip, indoor fan and electricity.If the mode of operation of wind guide strip comprises four
Kind, constitute set S1={ dead beat wind, upper bottom wind, left and right pendulum wind, upper and lower and left and right pendulum wind }；The wind speed pattern bag of indoor fan
Containing four kinds, constitute and gather the low wind of S2={, apoplexy, Gao Feng, powerful；The mode of operation of the auxiliary heat of electricity has two kinds, constitutes set S3=
Electric auxiliary heat is opened, and electricity auxiliary heat close, the mode of operation of three devices of summary, it is known that the set S of indoor set mode of operation be S1,
The combination of S2 Yu S3, i.e. S=S1 × S2 × S3.Therefore, the set S of indoor set mode of operation has 4 × 4 × 2=32 element,
Such as: M1=[electric auxiliary heat is opened for dead beat wind, low wind], M2=[the auxiliary heat of electricity is closed for dead beat wind, low wind], M3=[upper bottom wind, low
Wind, electric auxiliary heat is opened] etc..
According to examples provided above, S has 32 elements, i.e. A, B and has 32 to different values, be respectively [A1,
B1], [A2, B2] ... [A32, B32], corresponding to mode of operation M1, M2 ... M32.For [A1, B1], it will be assumed that for indoor set work
Operation mode is the situation of M1=[electric auxiliary heat is opened for dead beat wind, low wind], measures difference producing exchange input electric during debugging
The power consumption of pressure indoor set, and carry out calculating and try to achieve A1 and B1.If indoor set is under M1 mode of operation, 180V alternating current supplies
During electricity, power consumption is 40W, and in the case of 240V AC-powered, power consumption is 45W, then try to achieve:
A1=(45W-40W)/(240V-180V)=0.083W/V,
B1=45W-A1 × 240V=25W
Other power calculation coefficients (Ai, Bi) (i=2,3 ... 32) also can obtain in this way, determine.
According to formula (4), if indoor set works in pattern M1, and off-premises station to be transferred to the alternating voltage of indoor set effective
Value Urms=220V, then can calculate indoor set power consumption according to parameter A1, B1 is Pindoor=0.083W/V × 220V+25W
=43.26W.
Finally, indoor set electric-controlled plate MCU is according to power consumption P of indoor setindoorAnd off-premises station electric-controlled plate MCU transmission
Off-premises station power consumption P come overoutdoor, power consumption P of convertible frequency air-conditioner complete machine is calculated by formula (1)whole.If off-premises station
Pass to the P of indoor setoutdoorWith UrmsIt is respectively Poutdoor=850W, Urms=220V, then when indoor set works in pattern M1,
Complete machine power consumption is Pwhole=850W+43.26W=893.26W.
It should be noted that the self-checking system of convertible frequency air-conditioner power consumption of the present invention is simply detected by the present embodiment
A kind of example of method is enumerated, and does not limit protection scope of the present invention.
The self-checking system of a kind of convertible frequency air-conditioner power consumption, method and the off-premises station consumed work thereof that the embodiment of the present invention provides
The self-checking system of rate, only needs to increase several for detecting U on hardwarebdDivider resistance, just may utilize convertible frequency air-conditioner existing
Active or part active PFC (power factor compensation) circuit in sampling resistor and MCU on indoor, off-premises station electric-controlled plate,
Realizing convertible frequency air-conditioner complete machine power consumption and the detection of indoor set, off-premises station each power consumption, low cost and precision are higher,
Can effectively solve the problem that high cost or inadequate the asking of precision present in existing air-conditioner power consumption detecting system and method
Topic.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, although with reference to aforementioned reality
Executing example and the present invention has carried out explanation in greater detail, for a person skilled in the art, it still can be to aforementioned each reality
Execute the technical scheme described in example modify or wherein portion of techniques feature is carried out equivalent.All the present invention's
Any amendment, equivalent and the improvement etc. made within spirit and principle, should be included within the scope of the present invention.
Claims (9)
1. a self-checking system for frequency-variable air conditioner outdoor machine power consumption, with the rectifier bridge DC side outfan phase of alternating current power supply
Even, it is characterised in that the self-checking system of described off-premises station power consumption includes:
It is connected between described rectifier bridge the first DC side outfan and ground, is used for detecting described rectifier bridge DC side outfan electricity
The noninductive resistance R1 of flow valuve；
It is connected between described rectifier bridge the second DC side outfan and ground, is used for detecting described rectifier bridge DC side outfan electricity
The divider resistance R2 and divider resistance R3 of pressure value；
It is connected to one end and described dividing potential drop electricity that described noninductive resistance R1 connects altogether with rectifier bridge the first DC side outfan
One end that resistance R2 and divider resistance R3 connects altogether, is used for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, passing through
Calculate the off-premises station electric-controlled plate MCU determining described off-premises station power consumption.
2. the self-checking system of frequency-variable air conditioner outdoor machine power consumption as claimed in claim 1, it is characterised in that described without electrification
Resistance R1 is that described frequency-variable air conditioner outdoor machine is active or current sampling resistor in part active PFC circuit.
3. the self-checking system of frequency-variable air conditioner outdoor machine power consumption as claimed in claim 1, it is characterised in that described off-premises station
It is effective that electric-controlled plate MCU also can calculate the voltage of alternating current power supply according to the magnitude of voltage of described rectifier bridge DC side outfan obtained
Value, and by serial communication mode, the voltage effective value of off-premises station power consumption and alternating current power supply is passed to indoor set electric-controlled plate
MCU.
4. the self-checking system of a convertible frequency air-conditioner power consumption, it is characterised in that the self-inspection system of described convertible frequency air-conditioner power consumption
System includes:
It is connected between rectifier bridge the first DC side outfan and ground, is used for detecting described rectifier bridge DC side output end current value
Noninductive resistance R1；
It is connected between described rectifier bridge the second DC side outfan and ground, is used for detecting described rectifier bridge DC side outfan electricity
The divider resistance R2 and divider resistance R3 of pressure value；
It is connected to one end and described dividing potential drop electricity that described noninductive resistance R1 connects altogether with rectifier bridge the first DC side outfan
One end that resistance R2 and divider resistance R3 connects altogether, is used for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, passing through
Calculate voltage effective value and the off-premises station power consumption determining alternating current power supply, and by serial communication mode by off-premises station consumed work
The voltage effective value of rate and alternating current power supply passes to the off-premises station electric-controlled plate MCU of indoor set；
Receive the data of described off-premises station electric-controlled plate MCU transmission, in conjunction with the mode of operation of described convertible frequency air-conditioner, according to default room
The mapping relations of interior machine power consumption determine described indoor set power consumption, and calculate the indoor of described convertible frequency air-conditioner power consumption
Electrical Control plate MCU.
5. the self-checking system of convertible frequency air-conditioner power consumption as claimed in claim 4, it is characterised in that described convertible frequency air-conditioner consumption
The self-checking system of power also includes one for the display device showing described convertible frequency air-conditioner power consumption.
6. the self-checking system of convertible frequency air-conditioner power consumption as claimed in claim 4, it is characterised in that described noninductive resistance R1 is
Described frequency-variable air conditioner outdoor machine is active or current sampling resistor in part active PFC circuit.
7. the detection method of a self-checking system based on the convertible frequency air-conditioner power consumption described in claim 4, it is characterised in that
Described method includes:
Off-premises station electric-controlled plate MCU detects the voltage drop on described noninductive resistance R1, obtains described rectifier bridge DC side by calculating
The current value I of outfanbd；
Off-premises station electric-controlled plate MCU detects the voltage drop on described divider resistance R3, obtains described rectifier bridge DC side by calculating
The magnitude of voltage U of outfanbd；
Off-premises station electric-controlled plate MCU is calculated power consumption P of off-premises station according to preset relation formulaoutdoorAnd alternating current power supply
Voltage effective value UrmsAnd pass to indoor set electric-controlled plate MCU；
Indoor set electric-controlled plate MCU receives the data of described off-premises station electric-controlled plate MCU transmission, in conjunction with the mode of operation of convertible frequency air-conditioner,
Mapping relations according to default indoor set power consumption determine described indoor set power consumption Pindoor, and calculate described change
Frequently air-conditioning power consumption Pwhole。
8. the detection method of the self-checking system of convertible frequency air-conditioner power consumption as claimed in claim 7, it is characterised in that described room
Outer Electrical Control plate MCU is calculated power consumption P of off-premises station according to preset relation formulaoutdoorAnd the voltage of alternating current power supply has
Valid value UrmsIn preset relation formula particularly as follows:
Wherein, T is power consumption P calculating off-premises stationoutdoorWith alternating voltage virtual value UrmsTwo digital low-pass filterings used
The update cycle of device, TpWith TuIt is respectively the time constant of above-mentioned two wave digital lowpass filter, UbdpDefeated for rectifier bridge DC side
Go out the magnitude of voltage U of endbdAt each self-inspection sampling time interval TcInterior peak value, (k) and (k-1) represent variable respectively
In kth with k-1 sampling instant by the value acquired in off-premises station electric-controlled plate MCU.
9. the detection method of the self-checking system of convertible frequency air-conditioner power consumption as claimed in claim 7, it is characterised in that described room
Interior Electrical Control plate MCU determines described indoor set power consumption P according to the mapping relations of the indoor set power consumption presetindoorIn
Mapping relations be:
Pindoor=AUrms+B
Wherein, UrmsFor the voltage effective value of the alternating current power supply that off-premises station electric-controlled plate MCU calculates, A, B are that indoor set is preset
Power calculation factor under different working modes.
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| CN104678143A (en) * | 2015-02-28 | 2015-06-03 | 广东美的制冷设备有限公司 | Air conditioner as well as method and device for detecting power consumption of air conditioner |
| CN105091223B (en) * | 2015-07-31 | 2017-11-10 | 广东美的制冷设备有限公司 | Power consumption quantity measuring method, device and the air conditioner of air conditioner |
| CN105091220B (en) * | 2015-07-31 | 2017-11-10 | 广东美的制冷设备有限公司 | Power consumption quantity measuring method, device and the air conditioner of air conditioner |
| CN105091222B (en) * | 2015-07-31 | 2017-11-10 | 广东美的制冷设备有限公司 | Power consumption quantity measuring method, device and the air conditioner of air conditioner |
| CN105066346B (en) * | 2015-07-31 | 2017-12-19 | 广东美的制冷设备有限公司 | Power consumption quantity measuring method, device and the air conditioner of air conditioner |
| CN105066344B (en) * | 2015-07-31 | 2017-12-12 | 广东美的制冷设备有限公司 | Power consumption quantity measuring method, device and the air conditioner of air conditioner |
| CN105929273B (en) * | 2016-04-29 | 2019-08-20 | 青岛海尔空调电子有限公司 | Air conditioner and its indoor unit electric heater starting detection system and method |
| CN106123251B (en) * | 2016-08-19 | 2019-09-17 | 青岛海尔空调电子有限公司 | A kind of convertible frequency air-conditioner consumption power calculation algorithms |
| CN108180603A (en) * | 2017-12-26 | 2018-06-19 | Tcl空调器(中山)有限公司 | Refrigerating plant and electric energy management control method |
| CN109282445B (en) * | 2018-09-11 | 2021-10-22 | 广东美的暖通设备有限公司 | Air conditioner and control method and control device thereof |
| CN110736874B (en) * | 2019-10-16 | 2022-03-25 | 佛山市云米电器科技有限公司 | Electric quantity statistical method for intelligent bathroom heater |
| CN110749028B (en) * | 2019-10-29 | 2020-08-11 | 珠海格力电器股份有限公司 | Method, system and device for determining air conditioner operation power |
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