CN103675435A - Self-detection system for outdoor unit power consumption and overall power consumption of variable-frequency air conditioner, and self-detection method for outdoor unit power consumption and overall power consumption of variable-frequency air conditioner - Google Patents
Self-detection system for outdoor unit power consumption and overall power consumption of variable-frequency air conditioner, and self-detection method for outdoor unit power consumption and overall power consumption of variable-frequency air conditioner Download PDFInfo
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Abstract
The invention belongs to the field of refrigeration equipment detection control, and particularly relates to a self-detection system for the outdoor unit power consumption and the overall power consumption of a variable-frequency air conditioner, and a self-detection method for the outdoor unit power consumption and the overall power consumption of the variable-frequency air conditioner. According to the self-detection system for the outdoor unit power consumption and the overall power consumption of the variable-frequency air conditioner and the self-detection method for the outdoor unit power consumption and the overall power consumption of the variable-frequency air conditioner provided by the embodiment of the invention, only through the addition of hardware, i.e. the addition of several divider resistors for Ubd detection, a sampling resistor in an existing active or partially active PFC (Power Actor Correction) circuit of the variable-frequency air conditioner and MCUs (Microprogrammed Control Units) on an indoor unit electrical control board and an outdoor unit electrical control board can be utilized to achieve the detection of the overall power consumption of the variable-frequency air conditioner, as well as the detection of the respective power consumptions of an indoor unit and an outdoor unit. The invention has the advantages of low cost and higher precision, and can effectively solve the problem of excessively high cost or poor precision of the conventional air conditioner power consumption detection system and the conventional air conditioner power consumption detection method.
Description
Technical field
The invention belongs to refrigeration plant and detect control field, relate in particular to a kind of self-checking system and the method for frequency-variable air conditioner outdoor machine and complete machine consumed power thereof.
Background technology
Along with the day by day raising of people to energy problem's attention degree, household electrical appliance are also more and more higher in the requirement aspect energy-conservation.Air-conditioning is as the larger household electrical appliance of power consumption, and its consumed power especially receives user's concern.For this reason, many air-conditionings producer is using consumed power as the foundation that regulates machine running status, or by consumed power and output of power consumption to the display screen of air-conditioning so that user monitoring.
Existing air conditioning system maker has proposed a kind of basis and has recorded the power consumption control device that consumed power is controlled idle call electric weight, and this device has just comprised the detection module to consumed power; The air conditioner that separately has a kind of carried charge to show, this air conditioner has increased the module of power detection in power supply input, and the power recording and output of power consumption to the display screen of air conditioner.The method can be measured the consumed power of air conditioner complete machine exactly, but has increased extra power detection module, has greatly increased the cost of complete machine.
Also have a kind of air conditioner that can show consumed power and power consumption, this air conditioner is measured the current sinking of supply voltage and complete machine by voltage transformer (VT) and current transformer, and the MCU by indoor set calculates complete machine consumed power and power consumption accordingly.Its power calculation mode is relevant with power factor, but the magnitude of voltage recording with voltage transformer (VT) summation current transformer and current value be difficult to power factor to be calculated accurately, so the computational accuracy of its consumed power will be greatly affected.In addition,, owing to having increased voltage transformer (VT) and current transformer, complete machine cost also will increase.
Summary of the invention
The object of the present invention is to provide a kind of self-checking system of frequency-variable air conditioner outdoor machine consumed power, its testing cost is low and precision is higher, can solve the high cost or the inadequate problem of precision that in above-mentioned existing detection system and method, exist.
To achieve these goals, the technical solution adopted in the present invention is:
A self-checking system for frequency-variable air conditioner outdoor machine consumed power, is connected with the rectifier bridge DC side output terminal of AC power, it is characterized in that, the self-checking system of described off-premises station consumed power comprises:
Be connected between described rectifier bridge the first DC side output terminal and ground, for detection of the noninductive resistance R1 of described rectifier bridge DC side output end current value;
Be connected between described rectifier bridge the second DC side output terminal and ground, for detection of divider resistance R2 and the divider resistance R3 of described rectifier bridge DC side output end voltage value;
Be connected to one end that one end that described noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and described divider resistance R2 and divider resistance R3 connect altogether, for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, by the off-premises station electric-controlled plate MCU of off-premises station consumed power described in calculative determination.
The self-checking system that the present invention also aims to provide a kind of convertible frequency air-conditioner complete machine consumed power, native system has comprised the self-checking system of above-mentioned off-premises station consumed power, is specially:
A self-checking system for convertible frequency air-conditioner consumed power, is characterized in that, the self-checking system of described convertible frequency air-conditioner consumed power comprises:
Be connected between described rectifier bridge the first DC side output terminal and ground, for detection of the noninductive resistance R1 of described rectifier bridge DC side output end current value;
Be connected between described rectifier bridge the second DC side output terminal and ground, for detection of divider resistance R2 and the divider resistance R3 of described rectifier bridge DC side output end voltage value;
Be connected to one end that one end that described noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and described divider resistance R2 and divider resistance R3 connect altogether, for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, passing through voltage effective value and the described off-premises station consumed power of calculative determination AC power, and by serial communication mode, the voltage effective value of off-premises station consumed power and AC power is passed to the off-premises station electric-controlled plate MCU of indoor set;
Receive the data that described off-premises station electric-controlled plate MCU transmits, mode of operation in conjunction with described convertible frequency air-conditioner, according to the mapping relations of default indoor set consumed power, determine described indoor set consumed power, and calculate the indoor set electric-controlled plate MCU of described convertible frequency air-conditioner consumed power.
Object of the present invention is also to provide a kind of detection method of the self-checking system based on above-mentioned convertible frequency air-conditioner complete machine consumed power, specifically comprises the steps:
Off-premises station electric-controlled plate MCU detects the voltage drop on described noninductive resistance R1, obtains the current value (I of described rectifier bridge DC side output terminal by calculating
bd);
Off-premises station electric-controlled plate MCU detects the voltage drop on described divider resistance R3, obtains the magnitude of voltage (U of described rectifier bridge DC side output terminal by calculating
bd);
Off-premises station electric-controlled plate MCU calculates the consumed power (P of off-premises station according to preset relation formula
outdoor) and alternating voltage effective value (U
rms) and pass to indoor set electric-controlled plate MCU;
Indoor set electric-controlled plate MCU receives the data that described off-premises station electric-controlled plate MCU transmits, and in conjunction with the mode of operation of described convertible frequency air-conditioner, according to the mapping relations of default indoor set consumed power, determines described indoor set consumed power (P
indoor), and calculate described convertible frequency air-conditioner consumed power (P
whole).
The self-checking system of the self-checking system of a kind of convertible frequency air-conditioner consumed power provided by the invention, method and off-premises station consumed power thereof, testing cost is low and precision is higher, can solve the high cost or the inadequate problem of precision that in existing air conditioner consumed power detection system and method, exist.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the frequency-variable air conditioner outdoor machine consumed power self-checking system that provides of first embodiment of the invention;
Fig. 2 is the structure diagram of the self-checking system of the convertible frequency air-conditioner complete machine consumed power that provides of second embodiment of the invention;
Fig. 3 is the realization flow figure of the detection method of the convertible frequency air-conditioner consumed power self-checking system providing based on the second embodiment that provides of third embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The self-checking system of the self-checking system of a kind of convertible frequency air-conditioner consumed power provided by the invention, method and off-premises station consumed power thereof, testing cost is low and precision is higher, can solve the high cost or the inadequate problem of precision that in existing air conditioner consumed power detection system and method, exist.
embodiment mono-:
Fig. 1 is the structure diagram of the frequency-variable air conditioner outdoor machine consumed power self-checking system that provides of first embodiment of the invention; For convenience of explanation, only show the part relevant to the present embodiment, as shown in the figure:
A self-checking system for frequency-variable air conditioner outdoor machine consumed power, is connected with the rectifier bridge DC side output terminal of AC power AC, and joins with other frequency conversion interlock circuits, comprising:
Be connected between rectifier bridge the first DC side output terminal and ground, for detection of rectifier bridge DC side output end current value I
bdnoninductive resistance R1;
Be connected between rectifier bridge the second DC side output terminal and ground, for detection of rectifier bridge DC side output end voltage value U
bddivider resistance R2 and divider resistance R3;
Be connected to one end that one end that noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and divider resistance R2 and divider resistance R3 connect altogether, for obtaining rectifier bridge DC side output end current value I
bdwith magnitude of voltage U
bd, by calculative determination off-premises station consumed power P
outdooroff-premises station electric-controlled plate MCU.
The frequency-variable air conditioner outdoor machine consumed power self-checking system that this first embodiment provides, can detect following two physical quantitys by enough off-premises station electric-controlled plate MCU: one is the magnitude of voltage U of rectifier bridge DC side output terminal
bd; Another is the current value I of rectification bridge output end of flowing through
bd.Wherein, U
bdcan by MCU detect be connected to rectification bridge output end with reference to several magnitudes of voltage of connecting on divider resistance between ground, and carry out calculative determination, as preferred embodiment, only select two divider resistance R2 and R3 here; And I
bdcan by MCU detect connect with reference to and rectifier bridge DC side output terminal between the voltage drop of noninductive resistance R1, and carry out calculative determination.
On the other hand, noninductive resistance R1 is herein equivalent to the active or active PFC(power factor compensation of part of frequency-variable air conditioner outdoor machine) sampling resistor in circuit, general convertible frequency air-conditioner all contains these parts, therefore, for I
bddetection in the ordinary course of things without increasing new hardware.
Known in sum, the frequency-variable air conditioner outdoor machine consumed power self-checking system that this first embodiment provides only needs to increase several for detection of U on hardware
bddivider resistance, as preferably, also only need to increase corresponding rc filter circuit and realize, cost is lower.MCU records U
bdwith I
bdafterwards, can determine by multiplication computing formula the consumed power P of off-premises station
outdoor.
In addition,, as additional function, off-premises station electric-controlled plate MCU also can be according to the magnitude of voltage U of the rectifier bridge DC side output terminal obtaining
bdcalculate the voltage effective value U of AC power
rms, and by serial communication mode by off-premises station consumed power P
outdoorand the voltage effective value U of AC power
rmspass to the MCU of indoor set electric-controlled plate.
embodiment bis-:
Fig. 2 is the structure diagram of the self-checking system of the convertible frequency air-conditioner complete machine consumed power that provides of second embodiment of the invention; For convenience of explanation, only show the part relevant to the present embodiment.
The self-checking system of the convertible frequency air-conditioner consumed power that the present embodiment provides comprises the off-premises station consumed power self-checking system that the first embodiment provides, be noninductive resistance R1, divider resistance R2, divider resistance R3 and off-premises station electric-controlled plate MCU, also comprise an indoor set electric-controlled plate MCU who carries out serial communication with off-premises station electric-controlled plate MCU;
Wherein, noninductive resistance R1 is connected between rectifier bridge the first DC side output terminal and ground, for detection of rectifier bridge DC side output end current value I
bd; Divider resistance R2 and divider resistance R3 are connected between rectifier bridge the second DC side output terminal and ground, for detection of rectifier bridge DC side output end voltage value U
bd, two input ends of off-premises station electric-controlled plate MCU connect respectively one end that one end that noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and divider resistance R2 and divider resistance R3 connect altogether, for obtaining described rectifier bridge DC side output end current value I
bdwith magnitude of voltage U
bd, by the voltage effective value U of calculative determination AC power
rmsand off-premises station consumed power P
outdoor, by voltage effective value and the described off-premises station consumed power of calculative determination AC power, and by serial communication mode by alternating voltage effective value U
rmsand off-premises station consumed power P
outdoorpass to indoor set; The above-mentioned data that the outer Electrical Control plate MCU of indoor set electric-controlled plate MCU receiving chamber transmits, in conjunction with the real-time working pattern of convertible frequency air-conditioner, determine indoor set consumed power P according to the mapping relations of default indoor set consumed power
indoor, and calculate convertible frequency air-conditioner complete machine consumed power P
whole.Convertible frequency air-conditioner complete machine consumed power P
wholecan be expressed as:
P
whole=P
indoor+P
outdoor （1）
In this preferred embodiment, AC power AC is as shown in Figure 1 connected with indoor set power supply (being civil power) through indoor set relay, and the alternating voltage effective value that therefore off-premises station electric-controlled plate MCU can be detected is considered as the alternating voltage effective value U of indoor set
rms.When specific implementation, because all having power back-off, current most of convertible frequency air-conditioner controls (PFC) circuit, the PFC current sampling resistor that this circuit comprises is consistent with aforesaid noninductive resistance R1 function, can directly serve as noninductive resistance R1, thereby save the analog digital conversion port of a current sampling resistor and off-premises station electric-controlled plate MCU.And the electric current I of the rectifier bridge DC side output terminal of flowing through
bdcan produce size at noninductive resistance R1 two ends is U
aD1=I
bdthe magnitude of voltage of R1, the value of noninductive resistance R1 need to guarantee U
aD1within the input voltage range of allowing at off-premises station electric-controlled plate MCU analog digital conversion port.Divider resistance R2 and R3 are for detection of the magnitude of voltage U of rectifier bridge DC side output terminal
bd, so the value of divider resistance R2 and R3 need to guarantee the magnitude of voltage after voltage division processing, the magnitude of voltage U at the place, one end that divider resistance R2 and R3 connect altogether
aD2=U
bdr3/ (R2+R3), within the input voltage range that also should allow at off-premises station electric-controlled plate MCU analog digital conversion port.When outdoor plate MCU detects U
aD1with U
aD2afterwards, I
bdwith U
bdcan be tried to achieve by following formula:
Via a multiplier and the first low-pass filter, can directly calculate frequency-variable air conditioner outdoor machine consumed power P again
outdoor.And pass through U
bdat a time interval T
cinterior peak value U
bdpdivided by
try to achieve alternating voltage effective value U
rms, and by serial communication mode, above-mentioned two numbers are reportedly passed to the MCU of indoor set electric-controlled plate.
As preferred embodiment, the self-checking system of above-mentioned convertible frequency air-conditioner consumed power also comprises that one for showing convertible frequency air-conditioner complete machine consumed power P
wholedisplay device.
When specific implementation, the MCU of display device and indoor set electric-controlled plate joins, the indoor set consumed power P that the MCU of indoor set electric-controlled plate is calculated
indoorwith complete machine consumed power P
wholeshow, in order to the use of user's examination.
It should be noted that, the present embodiment is just enumerated a kind of preferred example of the self-checking system of convertible frequency air-conditioner consumed power of the present invention, does not limit protection scope of the present invention.
embodiment tri-:
Fig. 3 is the realization flow figure of the detection method of the convertible frequency air-conditioner consumed power self-checking system providing based on the second embodiment that provides of third embodiment of the invention; For convenience of explanation, only show the part relevant to the present embodiment.
The detection method of the convertible frequency air-conditioner consumed power self-checking system that the present embodiment provides comprises:
In step S301, off-premises station electric-controlled plate MCU detects the voltage drop on noninductive resistance R1, obtains the current value I of rectifier bridge DC side output terminal by calculating
bd;
In step S302, off-premises station electric-controlled plate MCU detects the voltage drop on divider resistance R3, obtains the magnitude of voltage U of rectifier bridge DC side output terminal by calculating
bd;
In step S303, off-premises station electric-controlled plate MCU calculates the consumed power P of off-premises station according to preset relation formula
outdoorand alternating voltage effective value U
rms, and pass to indoor set electric-controlled plate MCU;
In step S304, the data that the outer Electrical Control plate MCU of indoor set electric-controlled plate MCU receiving chamber transmits, in conjunction with the mode of operation of convertible frequency air-conditioner, determine indoor set consumed power P according to the mapping relations of default indoor set consumed power
indoor, and calculate convertible frequency air-conditioner complete machine consumed power P
whole.
When specific implementation, as preferred embodiment, in step S303, off-premises station electric-controlled plate MCU calculates the consumed power P of off-premises station according to preset relation formula
outdoorand alternating voltage effective value U
rmsin preset relation formula be specially:
Wherein, T is for calculating the consumed power P of off-premises station
outdoorwith alternating voltage effective value U
rmsthe update cycle of two wave digital lowpass filters used, T
pwith T
ube respectively above-mentioned two filter time constants, choosing of the time constant Tp of above-mentioned two low-pass filters and Tu needs to meet following two conditions: the frequency-variable air conditioner outdoor machine consumed power P of (1) wave filter output
outdoorwith alternating voltage effective value U
rmsharmonic components within acceptable scope; (2) wave filter output can be made a response to the variation of consumed power and alternating voltage effective value with enough fast speed.Be exemplified below: if the update cycle T=1ms of digital filter, desirable T
p=1s and T
u=0.5s.Ubdp is the magnitude of voltage U of rectifier bridge DC side output terminal
bdpeak value in interval Tc of each self check sampling time, (k) Yu (k-1) represents that respectively variable is in k and k-1 the value that sampling instant is obtained by off-premises station electric-controlled plate MCU.Alternating voltage effective value U
rmscan be by U
bdat a time interval T
cinterior peak value U
bdpdivided by
try to achieve.For the electric main of 50Hz, T
cdesirable 10ms is to the value between 20ms.
On the other hand, when specific implementation, the peak value U of rectifier bridge output voltage
bdp(be U
bdat a time interval T
cinterior peak value) can determine by following detection algorithm flow process.
In step S401, initialization predeterminated voltage peak value U
bdp0for 311V;
In step S402, read the real-time voltage U of rectifier bridge DC side output terminal
bd;
In step S403, more initialized voltage peak U
bdp0with real-time voltage U
bdsize, if U
bdp0be less than U
bd, upgrade the instant peak value U of alternating voltage
bdp=U
bd; If U
bdp0be not less than U
bd, keep the instant peak value U of alternating voltage
bdpfor default U
bdp0;
In step S404, through a sampling time section T
c, then read the real-time voltage U of rectifier bridge DC side output terminal
bd;
In step S405, more instant voltage peak U
bdpwith real-time voltage U
bdsize, if U
bdpbe less than U
bd, upgrade the instant peak value U of alternating voltage
bdp=U
bd; If U
bdpbe not less than U
bd, keep the instant peak value U of alternating voltage
bdpconstant.
Like this, every interval T of a sampling time
cjust obtain the real-time voltage U of a rectifier bridge DC side output terminal
bd, and with the instant peak value U of alternating voltage
bdpcompare, if real-time voltage U
bdbe greater than instant peak value U
bdp, upgrade instant peak value U
bdpvalue be real-time voltage U
bdif, real-time voltage U
bdbe less than or equal to instant peak value U
bdp, do not upgrade instant peak value U
bdpoperation; Above-mentioned steps loops, until user stops using convertible frequency air-conditioner, does not need to calculate consumed power again.Be briefly described for example below:
Suppose to get T
c=10ms, determines U in 0 to 10ms interval
bdmaximal value be 300.5V, according to formula listed above (3), can obtain U
bdp=300.5V, U
rms0=212.5V; Then at 10ms, to this sampling interval of 20ms, determine U
bdmaximal value be 302.1V, according to (3) formula, U
bdpwith U
rms0just be updated to respectively U
bdp=302.1V, U
rms0=213.6V; The rest may be inferred.
The consumed power P of the off-premises station that off-premises station electric-controlled plate MCU calculates
outdoorand alternating voltage effective value U
rms, can, by the serial communication mode between indoor set and off-premises station, pass to indoor set electric-controlled plate MCU.
In above-mentioned steps S304, the data that the outer Electrical Control plate MCU of indoor set electric-controlled plate MCU receiving chamber transmits, in conjunction with the mode of operation of convertible frequency air-conditioner, determine indoor set consumed power P according to the mapping relations of default indoor set consumed power
indoor, and calculate convertible frequency air-conditioner complete machine consumed power P
whole.
This step is when specific implementation, first to read the current mode of operation of indoor set be a kind of in mode of operation S set to indoor set electric-controlled plate MCU, S={M1 wherein, M2, Mn} is the set of the default mode of operation of convertible frequency air-conditioner, corresponding a pair of indoor set consumed power design factor A and B under each mode of operation.According to definite mode of operation, table look-up to process and obtain default indoor set consumed power design factor A and B, then, indoor set electric-controlled plate MCU, according to coefficient A, B and the alternating voltage effective value Urms that passed over by off-premises station electric-controlled plate MCU, calculates the consumed power Pindoor of indoor set by following listed formula (4).
P
indoor=AU
rms+B （4）
Below brief description indoor set mode of operation S set=M1, M2 ... how Mn} sets.Be exemplified below: establish the critical piece that indoor set comprises wind guide strip, indoor fan and auxiliary hot three consumed powers of electricity.If the mode of operation of wind guide strip comprises four kinds, form S set 1={ dead beat wind, upper bottom wind, left and right pendulum wind, upper and lower and left and right pendulum wind }; The wind speed pattern of indoor fan comprises four kinds, forms the low wind of S set 2={, apoplexy, and high wind, powerful; The mode of operation of the auxiliary heat of electricity has two kinds, forms the auxiliary heat of S set 3={ electricity and opens, and the auxiliary heat of electricity is closed }, the mode of operation of comprehensive above-mentioned three devices, the S set of known indoor set mode of operation is the combination of S1, S2 and S3, i.e. S=S1 * S2 * S3.Therefore, the S set of indoor set mode of operation has 4 * 4 * 2=32 element, and such as M1=[dead beat wind, low wind, electric auxiliary heat is opened], M2=[dead beat wind, low wind, the auxiliary heat of electricity is closed], M3=[upper bottom wind, low wind, electric auxiliary heat is opened] etc.
According to the example providing above, S has 32 elements, and A, B have 32 pairs of different values, is respectively [A1, B1], [A2, B2] ... [A32, B32], corresponding to mode of operation M1, M2 ... M32.For [A1, B1], can be assumed to be indoor set mode of operation is M1=[dead beat wind, and low wind, electric auxiliary heat is opened] situation, produce and debug process in measure the consumed power of indoor set under different AC-input voltage, and calculate and try to achieve A1 and B1.If indoor set is under M1 mode of operation, during 180V AC-powered, consumed power is 40W, and in 240V AC-powered situation, consumed power is 45W, tries to achieve:
A1＝(45W-40W)/(240V-180V)=0.083W/V，
B1=45W-A1×240V=25W
Other power calculation coefficient (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 is transferred to the alternating voltage effective value Urms=220V of indoor set, and according to parameter A 1, B1, can calculate indoor set consumed power is Pindoor=0.083W/V * 220V+25W=43.26W.
Finally, indoor set electric-controlled plate MCU is according to the consumed power P of indoor set
indoorand the off-premises station consumed power P that passes over of off-premises station electric-controlled plate MCU
outdoor, through type (1) calculates the consumed power P of convertible frequency air-conditioner complete machine
whole.If off-premises station passes to the P of indoor set
outdoorwith U
rmsbe respectively P
outdoors=850W, U
rms=220V,, when indoor set works in pattern M1, complete machine consumed power is P
whole=850W+43.26W=893.26W.
It should be noted that, the present embodiment is just enumerated a kind of example of the self-checking system detection method of convertible frequency air-conditioner consumed power of the present invention, does not limit protection scope of the present invention.
The self-checking system of the self-checking system of a kind of convertible frequency air-conditioner consumed power that the embodiment of the present invention provides, method and off-premises station consumed power thereof, on hardware, only needing increases several for detection of U
bddivider resistance, just can utilize the existing active or active PFC(power factor compensation of part of convertible frequency air-conditioner) MCU on sampling resistor in circuit and indoor, off-premises station electric-controlled plate, realize the detection of consumed power separately of convertible frequency air-conditioner complete machine consumed power and indoor set, off-premises station, cost is low and precision is higher, can effectively solve the high cost or the inadequate problem of precision that in existing air conditioner consumed power detection system and method, exist.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, although the present invention has been carried out to more detailed explanation with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified or part technical characterictic is wherein equal to replacement.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a self-checking system for frequency-variable air conditioner outdoor machine consumed power, is connected with the rectifier bridge DC side output terminal of AC power, it is characterized in that, the self-checking system of described off-premises station consumed power comprises:
Be connected between described rectifier bridge the first DC side output terminal and ground, for detection of the noninductive resistance R1 of described rectifier bridge DC side output end current value;
Be connected between described rectifier bridge the second DC side output terminal and ground, for detection of divider resistance R2 and the divider resistance R3 of described rectifier bridge DC side output end voltage value;
Be connected to one end that one end that described noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and described divider resistance R2 and divider resistance R3 connect altogether, for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, by the off-premises station electric-controlled plate MCU of off-premises station consumed power described in calculative determination.
2. the self-checking system of frequency-variable air conditioner outdoor machine consumed power as claimed in claim 1, is characterized in that, described noninductive resistance R1 is the current sampling resistor in the active or part active PFC circuit of described frequency-variable air conditioner outdoor machine.
3. the self-checking system of frequency-variable air conditioner outdoor machine consumed power as claimed in claim 1, it is characterized in that, described off-premises station electric-controlled plate MCU also can calculate according to the magnitude of voltage of the described rectifier bridge DC side output terminal obtaining the voltage effective value of AC power, and by serial communication mode, the voltage effective value of off-premises station consumed power and AC power is passed to the MCU of indoor set electric-controlled plate.
4. a self-checking system for convertible frequency air-conditioner consumed power, is characterized in that, the self-checking system of described convertible frequency air-conditioner consumed power comprises:
Be connected between described rectifier bridge the first DC side output terminal and ground, for detection of the noninductive resistance R1 of described rectifier bridge DC side output end current value;
Be connected between described rectifier bridge the second DC side output terminal and ground, for detection of divider resistance R2 and the divider resistance R3 of described rectifier bridge DC side output end voltage value;
Be connected to one end that one end that described noninductive resistance R1 and rectifier bridge the first DC side output terminal connect altogether and described divider resistance R2 and divider resistance R3 connect altogether, for obtaining described rectifier bridge DC side output end current value and magnitude of voltage, passing through voltage effective value and the described off-premises station consumed power of calculative determination AC power, and by serial communication mode, the voltage effective value of off-premises station consumed power and AC power is passed to the off-premises station electric-controlled plate MCU of indoor set;
Receive the data that described off-premises station electric-controlled plate MCU transmits, mode of operation in conjunction with described convertible frequency air-conditioner, according to the mapping relations of default indoor set consumed power, determine described indoor set consumed power, and calculate the indoor set electric-controlled plate MCU of described convertible frequency air-conditioner consumed power.
5. the self-checking system of convertible frequency air-conditioner consumed power as claimed in claim 4, is characterized in that, the self-checking system of described convertible frequency air-conditioner consumed power also comprises that one for showing the display device of described convertible frequency air-conditioner consumed power.
6. the self-checking system of convertible frequency air-conditioner consumed power as claimed in claim 4, is characterized in that, described noninductive resistance R1 is the current sampling resistor in the active or part active PFC circuit of described frequency-variable air conditioner outdoor machine.
7. the detection method based on convertible frequency air-conditioner consumed power self-checking system claimed in claim 4, is characterized in that, described method comprises:
Off-premises station electric-controlled plate MCU detects the voltage drop on described noninductive resistance R1, obtains the current value (Ibd) of described rectifier bridge DC side output terminal by calculating;
Off-premises station electric-controlled plate MCU detects the voltage drop on described divider resistance R3, obtains the magnitude of voltage (Ubd) of described rectifier bridge DC side output terminal by calculating;
Off-premises station electric-controlled plate MCU calculates consumed power (Poutdoor) and the alternating voltage effective value (Urms) of off-premises station and passes to indoor set electric-controlled plate MCU according to preset relation formula;
Indoor set electric-controlled plate MCU receives the data that described off-premises station electric-controlled plate MCU transmits, mode of operation in conjunction with convertible frequency air-conditioner, according to the mapping relations of default indoor set consumed power, determine described indoor set consumed power (Pindoor), and calculate described convertible frequency air-conditioner consumed power (Pwhole).
8. the detection method of convertible frequency air-conditioner consumed power self-checking system as claimed in claim 7, it is characterized in that, described off-premises station electric-controlled plate MCU calculates the consumed power (Poutdoor) of off-premises station according to preset relation formula and the preset relation formula in alternating voltage effective value (Urms) is specially:
Wherein, T is for calculating the consumed power (Poutdoor) of off-premises station and the update cycle of alternating voltage effective value (Urms) two wave digital lowpass filters used, Tp and Tu are respectively above-mentioned two filter time constants, Ubdp is the magnitude of voltage (Ubd) of the rectifier bridge DC side output terminal peak value within each interval (Tc) in self check sampling time, (k) Yu (k-1) represents that respectively variable is in k and k-1 the value that sampling instant is obtained by off-premises station electric-controlled plate MCU.
9. the detection method of convertible frequency air-conditioner consumed power self-checking system as claimed in claim 7, it is characterized in that, described indoor set electric-controlled plate MCU determines that according to the mapping relations of default indoor set consumed power the mapping relations in described indoor set consumed power (Pindoor) are:
P
indoor=AU
rms+B
Wherein, Urms is the alternating voltage effective value that off-premises station electric-controlled plate MCU calculates, and A, B are the power calculation factor under the default different working modes of indoor set.
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