CN108895632A - Switching method, air conditioner and the computer readable storage medium of pfc circuit - Google Patents
Switching method, air conditioner and the computer readable storage medium of pfc circuit Download PDFInfo
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- CN108895632A CN108895632A CN201810553685.0A CN201810553685A CN108895632A CN 108895632 A CN108895632 A CN 108895632A CN 201810553685 A CN201810553685 A CN 201810553685A CN 108895632 A CN108895632 A CN 108895632A
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- pfc
- working condition
- pfc circuit
- power factor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- Mechanical Engineering (AREA)
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- Air Conditioning Control Device (AREA)
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Abstract
The invention discloses a kind of switching methods of pfc circuit, include the following steps：Obtain the current power factor of the air conditioner；Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, determining and matched first working condition of the power factor；Determine whether first working condition, second working condition current with the pfc circuit be consistent；When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched to first working condition.The invention also discloses a kind of air conditioner and computer readable storage mediums.The present invention realizes the working condition according to the current power factor regulation pfc circuit of air conditioner, and the switching between low frequency PFC state and high frequency PFC state can be reasonably realized according to the power factor, air conditioner is enabled to take into account the demand of efficiency and power factor.
Description
Technical field
The present invention relates to air-conditioning technical fields more particularly to a kind of switching method of pfc circuit, air conditioner and computer can
Read storage medium.
Background technique
Currently, PFC (Power Factor Correction, PFC) technology has been widely used in air conditioner
In, PFC technology includes low frequency PFC and high frequency PFC.
Wherein, low frequency PFC is a kind of lower PFC technology of switching frequency, and under normal circumstances, switching frequency is less than
1KHz, such as pulse PFC, multiple-pulse PFC.High frequency PFC is PFC technology of the switching frequency in 30K or more, including Boost
The topological structures such as PFC and totem PFC, high frequency PFC can effectively improve power factor.Using high frequency PFC system power because
Number is high, but efficiency is lower than using the efficiency of low frequency PFC system.
Existing air conditioner generally uses high frequency PFC, to obtain higher power factor.But due to using high frequency PFC
Energy efficiency of air conditioner it is low, and cannot be considered in terms of demand of the air conditioner to efficiency.And some air conditioners only with low frequency PFC, then without
Method takes into account demand of the air conditioner to power factor.Cause existing air conditioner that can not combine air conditioner to efficiency and power factor
Demand.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill
Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of switching method of pfc circuit, air conditioner and computer-readable storages
Medium, it is intended to solve existing air conditioner often and can not be combined only with high frequency PFC or low frequency PFC air conditioner to efficiency and
The technical issues of demand of power factor.
To achieve the above object, the present invention provides a kind of switching method of pfc circuit, applied to the sky for being equipped with pfc circuit
Device is adjusted, the working condition of the pfc circuit includes at least low frequency PFC state and high frequency PFC state, the switching of the pfc circuit
Method includes the following steps：
Obtain the current power factor of the air conditioner；
Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, the determining and power factor
Matched first working condition；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, in one embodiment, the reflecting based on predetermined power factor and the working condition of the pfc circuit
The step of penetrating relationship, determining the first working condition matched with the power factor include：
Determine whether the power factor is less than predetermined power factor；
When the power factor is less than predetermined power factor, determine that first working condition is high frequency PFC state.
Further, in one embodiment, the step of whether determination power factor is less than predetermined power factor
Later, further include：
When the power factor is greater than or equal to predetermined power factor, determine that first working condition is low frequency PFC
State.
Further, in one embodiment, the determination first working condition and the pfc circuit it is current second
The whether consistent step of working condition includes：
Determine the corresponding PFC frequency of second working condition and the corresponding default PFC frequency of first working condition
Rate range；
Determine whether the PFC frequency is in the default PFC frequency range, wherein be in institute in the PFC frequency
When stating except default PFC frequency range, the second working condition of first working condition and the pfc circuit currently is determined not
Unanimously.
Further, in one embodiment, the step of determination second working condition corresponding PFC frequency is wrapped
It includes：
Sampling operation is carried out to the pfc circuit, obtains the current waveform of the pfc circuit；
The PFC frequency is determined according to the current waveform.
Further, in one embodiment, the step of power factor for obtaining the air conditioner includes：
Obtain the apparent energy of the air-conditioner outdoor unit and the useful work power of the cooler compressor；
Based on power factor described in the apparent energy and the useful work power calculation.
Further, in one embodiment, the step of useful work power of the compressor for obtaining the air conditioner wraps
It includes：
Obtain d shaft current, d shaft voltage, q shaft current and the q shaft voltage of the compressor；
The useful work power is calculated based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage.
Further, in one embodiment, the step of apparent energy for obtaining the outdoor unit of the air conditioner includes：
Obtain the input current and input voltage of the outdoor unit；
Effective current value is calculated based on the input current, and effective voltage value is calculated based on the input voltage；
The apparent energy is calculated based on the effective current value and the effective voltage value.
Further, in one embodiment, the pfc circuit includes Boost PFC or totem PFC.
In addition, to achieve the above object, the present invention also provides a kind of air conditioner, the air conditioner includes：Memory, processing
Device and the changeover program for being stored in the pfc circuit that can be run on the memory and on the processor, the pfc circuit
Changeover program realizes the step of switching method of pfc circuit described in any of the above embodiments when being executed by the processor.
In addition, to achieve the above object, the present invention also provides a kind of computer readable storage mediums, which is characterized in that institute
The changeover program that pfc circuit is stored on computer readable storage medium is stated, the changeover program of the pfc circuit is held by processor
The step of switching method of pfc circuit described in any of the above embodiments is realized when row.
The present invention is by obtaining the current power factor of the air conditioner, then based on predetermined power factor and the PFC
The mapping relations of the working condition of circuit, it is determining with matched first working condition of the power factor, then determine described the
Whether one working condition, second working condition current with the pfc circuit be consistent, then in first working condition and institute
State the second working condition it is inconsistent when, the working condition of the pfc circuit is switched to first working condition, realizes root
According to the working condition of the current power factor regulation pfc circuit of air conditioner, low frequency can be reasonably realized according to the power factor
Switching between PFC state and high frequency PFC state, enables air conditioner to take into account the demand of efficiency and power factor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air conditioner in hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of the switching method first embodiment of pfc circuit of the present invention；
Fig. 3 is current waveform schematic diagram when pfc circuit of the present invention is in low frequency PFC state；
Fig. 4 is current waveform schematic diagram when pfc circuit of the present invention is in high frequency PFC state；
Fig. 5 is the current waveform and power factor waveform diagram of FPC circuit of the present invention；
Fig. 6 is in the switching method second embodiment of pfc circuit of the present invention based on predetermined power factor and the pfc circuit
Working condition mapping relations, refinement process the step of determining the first working condition matched with the power factor illustrates
Figure；
Fig. 7 is that first working condition and the PFC are determined in the switching method 3rd embodiment of pfc circuit of the present invention
The refinement flow diagram of the whether consistent step of the second current working condition of circuit；
Fig. 8 is that the corresponding PFC of second working condition is determined in the switching method fourth embodiment of pfc circuit of the present invention
The refinement flow diagram of the step of frequency and first working condition corresponding default PFC frequency range；
Fig. 9 be pfc circuit of the present invention the 5th embodiment of switching method in obtain the current power factor of the air conditioner
The step of refinement flow diagram；
Figure 10 be pfc circuit of the present invention switching method sixth embodiment in obtain the useful work of the cooler compressor
The refinement flow diagram of the step of power；
Figure 11 be pfc circuit of the present invention the 7th embodiment of switching method in obtain the view of the air-conditioner outdoor unit in function
The refinement flow diagram of the step of rate.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figure 1, Fig. 1 is the structural representation of air conditioner in hardware running environment that the embodiment of the present invention is related to
Figure.
As shown in Figure 1, the air conditioner may include：Processor 1001, such as CPU, network interface 1004, user interface
1003, memory 1005, communication bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between these components.
User interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface
1003 can also include standard wireline interface and wireless interface.Network interface 1004 optionally may include that the wired of standard connects
Mouth, wireless interface (such as WI-FI interface).Memory 1005 can be high speed RAM memory, be also possible to stable memory
(non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor
1001 storage device.
Optionally, air conditioner can also include camera, RF (Radio Frequency, radio frequency) circuit, sensor, sound
Frequency circuit, WiFi module etc..Wherein, sensor such as optical sensor, motion sensor and other sensors.Certainly, empty
Device is adjusted to can also configure the other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, it is no longer superfluous herein
It states.
It will be understood by those skilled in the art that air conditioner structure shown in Fig. 1 does not constitute the restriction to air conditioner, it can
To include perhaps combining certain components or different component layouts than illustrating more or fewer components.
As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage medium
Believe the changeover program of module, Subscriber Interface Module SIM and pfc circuit.
In air conditioner shown in Fig. 1, network interface 1004 be mainly used for connect background server, with background server into
Row data communication；User interface 1003 is mainly used for connecting client (user terminal), carries out data communication with client；And it handles
Device 1001 can be used for calling the changeover program of the pfc circuit stored in memory 1005.
In the present embodiment, air conditioner includes：It memory 1005, processor 1001 and is stored on the memory 1005
And the changeover program for the pfc circuit that can be run on the processor 1001, wherein processor 1001 calls in memory 1005
When the changeover program of the pfc circuit of storage, and execute following operation：
Obtain the current power factor of the air conditioner；
Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, the determining and power factor
Matched first working condition；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Determine whether the power factor is less than predetermined power factor；
When the power factor is less than predetermined power factor, determine that first working condition is high frequency PFC state.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
When the power factor is greater than or equal to predetermined power factor, determine that first working condition is low frequency PFC
State.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Determine the corresponding PFC frequency of second working condition and the corresponding default PFC frequency of first working condition
Rate range；
Determine whether the PFC frequency is in the default PFC frequency range, wherein be in institute in the PFC frequency
When stating except default PFC frequency range, the second working condition of first working condition and the pfc circuit currently is determined not
Unanimously.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Sampling operation is carried out to the pfc circuit, obtains the current waveform of the pfc circuit；
The PFC frequency is determined according to the current waveform.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Obtain the apparent energy of the air-conditioner outdoor unit and the useful work power of the cooler compressor；
Based on power factor described in the apparent energy and the useful work power calculation.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Obtain d shaft current, d shaft voltage, q shaft current and the q shaft voltage of the compressor；
The useful work power is calculated based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage.
Further, processor 1001 can call the changeover program of the pfc circuit stored in memory 1005, also execute
It operates below：
Obtain the input current and input voltage of the outdoor unit；
Effective current value is calculated based on the input current, and effective voltage value is calculated based on the input voltage；
The apparent energy is calculated based on the effective current value and the effective voltage value.
The present invention also provides a kind of switching methods of pfc circuit, are the switching side of pfc circuit of the present invention referring to Fig. 2, Fig. 2
The flow diagram of method first embodiment.
In the present embodiment, the switching method of the pfc circuit is applied to the air conditioner equipped with pfc circuit, the pfc circuit
Working condition include at least low frequency PFC state and high frequency PFC state.Wherein, low frequency is in the working condition of pfc circuit
PFC state, the pfc circuit operate under low frequency PFC function, to improve the efficiency of air conditioner；At the working condition of pfc circuit
In high frequency PFC state, which is operated under high frequency PFC function, to improve the power factor of air conditioner.
Wherein, which includes Boost PFC or totem PFC.Since Boost PFC can also promote compressor
DC bus-bar voltage, therefore Boost PFC can be used in the pfc circuit.Specifically, when pfc circuit is in low frequency PFC state,
The pfc circuit is low frequency multiple-pulse PFC or low frequency pulse PFC, when pfc circuit is in high frequency PFC state, the pfc circuit
For Boost PFC.
As shown in figure 3, Fig. 3 is the current waveform when pfc circuit is in low frequency PFC state, the electric current of usual low frequency PFC
Periodicity shown in Fig. 3 is presented in waveform, and current spike when closing without PFC occurs, and sine wave is not also presented.With high frequency
PFC state is compared, and pfc circuit is more efficient at this time, is more advantageous to the ultrahigh energy efficiency for realizing air-conditioning.
As shown in figure 4, Fig. 4 is the current waveform when pfc circuit is in high frequency PFC state, the electric current of usual high frequency PFC
The sinusoidal wave shape in Fig. 4, and the alternating voltage same-phase with input is presented in waveform.Compared with low frequency PFC state, PFC is electric at this time
Road can be with the DC bus-bar voltage of constant compression machine, and DC bus-bar voltage can be lifted, and can less weak magnetic cause
Electric current increase.
In the present embodiment, the switching method of the pfc circuit includes：
Step S100 obtains the current power factor of the air conditioner；
It in the present embodiment, can in real time or the current power factor of timing acquisition air conditioner when air conditioner is run.The function
Rate factor is the power factor of outdoor unit system of air conditioner, can pass through the useful work power of outdoor unit and the apparent energy of outdoor unit
It obtains.Since in Control Method of Inverter Air Conditioner, the power of compressor occupies the overwhelming majority of outdoor unit consumption power, therefore
The useful work power that compressor consumption can be used replaces the useful work power of outdoor unit, i.e., by the apparent energy of outdoor unit with
The useful work power of compressor obtains the power factor.
Step S200, the mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, it is determining with it is described
Matched first working condition of power factor；
In the present embodiment, the mapping relations that predetermined power factor Yu pfc circuit working condition can be preset are obtaining
When to power factor, according to the mapping relations of the power factor and predetermined power factor and pfc circuit working condition obtain with
Matched first working condition of the power factor.
Step S300 determines whether first working condition, second working condition current with the pfc circuit be consistent；
Step S400, when first working condition and second working condition are inconsistent, by the pfc circuit
Working condition is switched to first working condition.
In the present embodiment, when determining the first working condition, determine that first working condition and pfc circuit are current
Whether the second working condition is consistent；It specifically, can be by the corresponding predeterminated frequency range of the first working condition, with the pfc circuit
The corresponding PFC frequency of the second current working condition, the i.e. current PFC frequency of pfc circuit, determine the first working condition and second
Whether working condition is consistent, wherein when PFC frequency is within the scope of predeterminated frequency, determines the first working condition and the second work
Make state consistency, when PFC frequency is in except predeterminated frequency range, determines that the first working condition and the second working condition are different
It causes.
For example, the predeterminated frequency range is the corresponding frequency of low frequency PFC if the first working condition is low frequency PFC state
Range, when the current PFC frequency of the pfc circuit is within the scope of the predeterminated frequency, which is in low frequency PFC state,
I.e. the first working condition is consistent with the second working condition, and otherwise the first working condition and the second working condition are inconsistent；If first
Working condition is high frequency PFC state, then the predeterminated frequency range is the corresponding frequency range of high frequency PFC, current in the pfc circuit
PFC frequency when being within the scope of the predeterminated frequency, which is in high frequency PFC state, i.e. the first working condition and second
Working condition is consistent, and otherwise the first working condition and the second working condition are inconsistent.
When determining that the first working condition and the second working condition are inconsistent, the working condition of pfc circuit is switched to the
One working condition；For example, the first working condition is low frequency PFC state, the second working condition is high frequency PFC state, then by PFC electricity
The working condition on road is switched to low frequency PFC state, i.e. the working condition of pfc circuit is switched to low frequency PFC shape by high frequency PFC state
State；And then realize the switching in pfc circuit between low frequency PFC state and high frequency PFC state, it can be under specific operation, by PFC
The working condition of circuit is switched to low frequency PFC state by high frequency PFC state, to guarantee the high energy efficiency of air conditioner, alternatively, by PFC
The working condition of circuit is switched to high frequency PFC state by low frequency PFC state, to ensure that air conditioner High Power Factor is run, in turn
Take into account demand of the air conditioner to efficiency and power factor.
It should be noted that carrying out current sample acquisition using oscillograph when being debugged before air conditioner factory
The current waveform of PFC electric current obtains the PFC frequency of pfc circuit by current waveform, and can show in the display interface of oscillograph
The current waveform of FPC circuit.Meanwhile in air-conditioner outdoor unit access power analyzer, to measure the power factor of outdoor unit.?
When measurement, the power factor of air conditioner can be changed by the running frequency of manual setting compressor, so that power analyzer
The power factor value of measurement changes, and can show power factor waveform in the display interface of the power analyzer.Referring to figure
5, Fig. 5 be the current waveform and power factor waveform diagram of FPC circuit, real in the power factor waveform diagram of Fig. 5
Line is power factor wavy curve, dotted line is predetermined power factor wavy curve；As shown in Figure 5, reach default in power factor
When power factor, the working condition of pfc circuit is switched to high frequency PFC state by low frequency PFC state, to ensure air conditioner high power
Factor operation.
Using the air conditioner of the switching method of the present embodiment pfc circuit, with it is existing using the air conditioner of high frequency PFC compared with,
The problem that the demand of efficiency and power factor can be taken into account, and then avoid air conditioner high energy consumption and efficiency low.According to Boost
PFC, the air conditioner can also take into account the boosting demand of compressor busbar voltage.
The switching method for the pfc circuit that the present embodiment proposes, by obtaining the current power factor of the air conditioner, then
Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, determining matched with the power factor the
One working condition then determines whether first working condition, second working condition current with the pfc circuit be consistent, so
Afterwards when first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched to
First working condition realizes the working condition according to the current power factor regulation pfc circuit of air conditioner, being capable of basis
The power factor reasonably realizes the switching between low frequency PFC state and high frequency PFC state, and air conditioner is enabled to take into account efficiency
And the demand of power factor.
Based on first embodiment, the second embodiment of the switching method of pfc circuit of the present invention is proposed, referring to Fig. 6, in this reality
It applies in example, step S200 includes：
Step S210, determines whether the power factor is less than predetermined power factor；
Step S220 determines that first working condition is high frequency when the power factor is less than predetermined power factor
PFC state.
Further, in one embodiment, after step S210, further include：It is greater than or equal in the power factor
When predetermined power factor, determine that first working condition is low frequency PFC state.
In the present embodiment, when getting the current power factor of air conditioner, it is pre- to determine whether the power factor is less than
If power factor, if the power factor is less than predetermined power factor, it is determined that first working condition is low high frequency PFC state,
If the power factor is greater than or equal to predetermined power factor, it is determined that high first working condition is high frequency PFC state, Jin Erneng
Enough power factors according to compressor accurately determine the first working condition, improve pfc circuit and carry out low frequency PFC state and high frequency
The accuracy of switching between PFC state.
Wherein, predetermined power factor can be rationally arranged, for example, the predetermined power factor can be according to the work of air conditioner
Condition is rationally arranged.
Whether the switching method for the pfc circuit that the present embodiment proposes, be less than predetermined power by the determination power factor
Factor determines that first working condition is high frequency PFC state then when the power factor is less than predetermined power factor,
The first working condition can be accurately determined according to power factor, improve pfc circuit and carry out low frequency PFC state and high frequency PFC state
Between switching accuracy, enable air conditioner to take into account the demand of efficiency and power factor.
Based on first embodiment, the 3rd embodiment of the switching method of pfc circuit of the present invention is proposed, referring to Fig. 7, in this reality
It applies in example, step S300 includes：
Step S310 determines that the corresponding PFC frequency of second working condition and first working condition are corresponding
Default PFC frequency range；
Step S320, determines whether the PFC frequency is in the default PFC frequency range, wherein in the PFC
When frequency is in except the default PFC frequency range, determine that first working condition and second working condition are different
It causes.
In the present embodiment, in determining the first working condition matched with compressor running frequency, obtain this first
The corresponding PFC frequency of the second working condition of the corresponding default PFC frequency range of working condition and pfc circuit currently,
In, which refers to the current running frequency of the pfc circuit, which refers to that the pfc circuit is in and be somebody's turn to do
PFC frequency range when the first working condition, if the first working condition is high frequency PFC state, which is height
The corresponding frequency range of frequency PFC.
When determining PFC frequency and default PFC frequency range, determine whether the PFC frequency is in default PFC frequency range
It is interior, if PFC frequency is in the default PFC frequency range, determine that the first working condition is consistent with the second working condition, this
The working condition of Shi Wuxu adjustment pfc circuit determines the first work if PFC frequency is in except the default PFC frequency range
It is inconsistent to make state second working condition current with pfc circuit, at this time, it may be necessary to switch the working condition of pfc circuit, to meet
The demand of air conditioner high energy efficiency and High Power Factor.
The switching method for the pfc circuit that the present embodiment proposes passes through the corresponding PFC frequency of determination second working condition
Rate and the corresponding default PFC frequency range of first working condition, then determine whether the PFC frequency is in described
In default PFC frequency range, wherein when the PFC frequency is in except the default PFC frequency range, determine described the
One working condition and second working condition are inconsistent, can accurately be judged according to PFC frequency and default PFC frequency range
Whether the first working condition consistent with the second working condition, improve pfc circuit high frequency PFC state and low frequency PFC state it
Between the accuracy that switches.
Based on 3rd embodiment, the fourth embodiment of the switching method of pfc circuit of the present invention is proposed, referring to Fig. 8, in this reality
It applies in example, step S310 includes：
Step S311 carries out sampling operation to the pfc circuit, to obtain the current waveform of the pfc circuit；
Step S312 determines the PFC frequency according to the current waveform.
In the present embodiment, high since periodicity shown in Fig. 3 is presented in the current waveform of low frequency PFC referring to Fig. 3 and Fig. 4
The sinusoidal wave shape in Fig. 4, and the alternating voltage same-phase with input is presented in the current waveform of frequency PFC, therefore, can pass through sampling electricity
Road carries out sampling operation to pfc circuit, and then obtains the current waveform of pfc circuit, and determines PFC frequency according to the current waveform
Rate, and then accurately determine the current PFC frequency of the pfc circuit.
The switching method for the pfc circuit that the present embodiment proposes, by carrying out sampling operation to the pfc circuit, to obtain
The current waveform of the pfc circuit determines the PFC frequency then according to the current waveform, can be according to the electricity of pfc circuit
It flows waveform and accurately determines PFC frequency, and then the first working condition is accurately judged according to PFC frequency and default PFC frequency range
It is whether consistent with the second working condition, it further improves pfc circuit and switches between high frequency PFC state and low frequency PFC state
Accuracy.
Based on first embodiment, the 5th embodiment of the switching method of pfc circuit of the present invention is proposed, referring to Fig. 9, in this reality
It applies in example, step S100 includes：
Step S110 obtains the apparent energy of the air-conditioner outdoor unit and the useful work of the cooler compressor
Power；
Step S120, based on power factor described in the apparent energy and the useful work power calculation.
In the present embodiment, since in Control Method of Inverter Air Conditioner, the power of compressor occupies outdoor unit consumption function
The overwhelming majority of rate, therefore the useful work power that compressor consumption can be used replaces the useful work power of outdoor unit, that is, passes through
The apparent energy of outdoor unit and the useful work power of compressor obtain the power factor.
The apparent energy of air-conditioner outdoor unit and the useful work power of compressor are obtained, then according to apparent energy
And useful work power obtains the power factor, specifically, which can be obtained by following formula：
Wherein, η is power factor, pcompFor useful work power, pSFor the apparent energy of outdoor unit.
The switching method for the pfc circuit that the present embodiment proposes, by obtaining the apparent energy of the air-conditioner outdoor unit, with
And the useful work power of the cooler compressor, then based on function described in the apparent energy and the useful work power calculation
Rate factor can be accurately obtained power factor according to the apparent energy of outdoor unit and the useful work power of compressor, in turn
The first working condition is accurately determined according to power factor, is improved pfc circuit and is carried out between low frequency PFC state and high frequency PFC state
Switching accuracy.
Based on the 5th embodiment, propose the sixth embodiment of the switching method of pfc circuit of the present invention, referring to Fig.1 0,
In embodiment, step S110 includes：
Step S111 obtains d shaft current, d shaft voltage, q shaft current and the q shaft voltage of the compressor；
Step S112 calculates the useful work power based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage.
In the present embodiment, compressor can be calculated by the d shaft current of compressor, d shaft voltage, q shaft current and q axis electricity
Useful work power specifically obtains the d shaft current i of compressord, d shaft voltage ud, q shaft current iqAnd q shaft voltage uq, and according to
Following formula calculates useful work power pcomp：
pcomp=udid+uqiq。
Specifically, the d shaft current i of compressor can be obtained by existing algorithmdAnd q shaft current iq, pass through stator magnetic linkage equation
Obtain magnetic linkage component of the stator of compressor under d, q axis, stator magnetic linkage equation such as following formula：
Wherein, Ld、LqRespectively equivalent inductance of the stator inductance of compressor under d, q axis；ψfFor rotor-exciting magnetic field chain
Cross the magnetic linkage of stator winding；ψd、ψqRespectively magnetic linkage component of the stator of compressor under d, q axis.
Then, according to d shaft current id, q shaft current iq, magnetic linkage component ψ of the stator under d, q axisd、ψqPass through electric moter voltage
Equation calculation obtains d shaft voltage udAnd q shaft voltage uq, electric moter voltage equation such as following formula：
Wherein, p is differential operator, RsFor stator resistance, ωrFor rotor velocity.
The switching method for the pfc circuit that the present embodiment proposes, by the d shaft current, the d shaft voltage, q that obtain the compressor
Shaft current and q shaft voltage then calculate the useful work function based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage
Rate can accurately obtain the useful work power of compressor, Jin Ergen according to d shaft current, d shaft voltage, q shaft current and q shaft voltage
The first working condition is accurately determined according to useful work power, is further increased pfc circuit and is carried out low frequency PFC state and high frequency PFC shape
The accuracy of switching between state.
Based on the 5th embodiment, propose the 7th embodiment of the switching method of pfc circuit of the present invention, referring to Fig.1 1,
In embodiment, step S110 includes：
Step S113 obtains the input current and input voltage of the outdoor unit；
Step S114 calculates effective current value based on the input current, and calculates effectively electricity based on the input voltage
Pressure value；
Step S115 calculates the apparent energy based on the effective current value and the effective voltage value.
In the present embodiment, voltage and current acquisition module can be set in air conditioner, mould is acquired by the voltage and current
Block acquire outdoor unit input current and input voltage, due to collected input current, input voltage be respectively alternating current,
Alternating voltage, therefore calculate the effective voltage value of the effective current value of input current, input voltage, and according to effective current value and
Effective voltage value obtains the apparent energy of outdoor unit, and then accurately obtains the apparent energy of outdoor unit.
The switching method for the pfc circuit that the present embodiment proposes, by the input current and input electricity that obtain the outdoor unit
Pressure then calculates effective current value based on the input current, and calculates effective voltage value based on the input voltage, then base
The apparent energy is calculated in the effective current value and the effective voltage value, it can be quasi- according to input current and input voltage
The apparent energy of outdoor unit is really obtained, and then the first working condition is accurately determined according to apparent energy, further increases pfc circuit
Carry out the accuracy of the switching between low frequency PFC state and high frequency PFC state.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium
On be stored with the changeover program of pfc circuit, following operation is realized when the changeover program of the pfc circuit is executed by processor：
Obtain the current power factor of the air conditioner；
Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, the determining and power factor
Matched first working condition；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, by the working condition of the pfc circuit
It is switched to first working condition.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Determine whether the power factor is less than predetermined power factor；
When the power factor is less than predetermined power factor, determine that first working condition is high frequency PFC state.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
When the power factor is greater than or equal to predetermined power factor, determine that first working condition is low frequency PFC
State.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Determine the corresponding PFC frequency of second working condition and the corresponding default PFC frequency of first working condition
Rate range；
Determine whether the PFC frequency is in the default PFC frequency range, wherein be in institute in the PFC frequency
When stating except default PFC frequency range, the second working condition of first working condition and the pfc circuit currently is determined not
Unanimously.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Sampling operation is carried out to the pfc circuit, obtains the current waveform of the pfc circuit；
The PFC frequency is determined according to the current waveform.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Obtain the apparent energy of the air-conditioner outdoor unit and the useful work power of the cooler compressor；
Based on power factor described in the apparent energy and the useful work power calculation.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Obtain d shaft current, d shaft voltage, q shaft current and the q shaft voltage of the compressor；
The useful work power is calculated based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage.
Further, following operation is also realized when the changeover program of the pfc circuit is executed by processor：
Obtain the input current and input voltage of the outdoor unit；
Effective current value is calculated based on the input current, and effective voltage value is calculated based on the input voltage；
The apparent energy is calculated based on the effective current value and the effective voltage value.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the system that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or system.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that terminal device (it can be mobile phone,
Computer, server, air conditioner device or the network equipment etc.) execute method described in each embodiment of the present invention.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (11)
1. a kind of switching method of pfc circuit, which is characterized in that applied to the air conditioner for being equipped with pfc circuit, the pfc circuit
Working condition include at least low frequency PFC state and high frequency PFC state, the switching method of the pfc circuit and include the following steps：
Obtain the current power factor of the air conditioner；
Mapping relations based on predetermined power factor Yu the working condition of the pfc circuit, determination are matched with the power factor
The first working condition；
Determine whether first working condition, second working condition current with the pfc circuit be consistent；
When first working condition and second working condition are inconsistent, the working condition of the pfc circuit is switched
For first working condition.
2. the switching method of pfc circuit as described in claim 1, which is characterized in that described to be based on predetermined power factor and institute
The step of stating the mapping relations of the working condition of pfc circuit, determining the first working condition matched with the power factor include：
Determine whether the power factor is less than predetermined power factor；
When the power factor is less than predetermined power factor, determine that first working condition is high frequency PFC state.
3. the switching method of pfc circuit as claimed in claim 2, which is characterized in that whether the determination power factor
After the step of less than predetermined power factor, further include：
When the power factor is greater than or equal to predetermined power factor, determine that first working condition is low frequency PFC state.
4. the switching method of pfc circuit as described in claim 1, which is characterized in that determination first working condition
The whether consistent step of the second current working condition includes with the pfc circuit：
Determine the corresponding PFC frequency of second working condition and the corresponding default PFC frequency model of first working condition
It encloses；
Determine whether the PFC frequency is in the default PFC frequency range, wherein be in described pre- in the PFC frequency
If when except PFC frequency range, determining that first working condition, second working condition current with the pfc circuit is different
It causes.
5. the switching method of pfc circuit as claimed in claim 4, which is characterized in that determination second working condition
The step of corresponding PFC frequency includes：
Sampling operation is carried out to the pfc circuit, obtains the current waveform of the pfc circuit；
The PFC frequency is determined according to the current waveform.
6. the switching method of pfc circuit as described in claim 1, which is characterized in that the power for obtaining the air conditioner
The step of factor includes：
Obtain the apparent energy of the air-conditioner outdoor unit and the useful work power of the cooler compressor；
Based on power factor described in the apparent energy and the useful work power calculation.
7. the switching method of pfc circuit as claimed in claim 6, which is characterized in that the compression for obtaining the air conditioner
The step of useful work power of machine includes：
Obtain d shaft current, d shaft voltage, q shaft current and the q shaft voltage of the compressor；
The useful work power is calculated based on the d shaft current, d shaft voltage, q shaft current and q shaft voltage.
8. the switching method of pfc circuit as claimed in claim 6, which is characterized in that the outdoor for obtaining the air conditioner
The step of apparent energy of machine includes：
Obtain the input current and input voltage of the outdoor unit；
Effective current value is calculated based on the input current, and effective voltage value is calculated based on the input voltage；
The apparent energy is calculated based on the effective current value and the effective voltage value.
9. such as the switching method of pfc circuit described in any item of the claim 1 to 8, which is characterized in that the pfc circuit packet
Include Boost PFC or totem PFC.
10. a kind of air conditioner, which is characterized in that the air conditioner includes：It memory, processor and is stored on the memory
And the changeover program for the pfc circuit that can be run on the processor, the changeover program of the pfc circuit are held by the processor
The step of switching method of pfc circuit as claimed in any one of claims 1-9 wherein is realized when row.
11. a kind of computer readable storage medium, which is characterized in that be stored with PFC electricity on the computer readable storage medium
It realizes when the changeover program of the changeover program on road, the pfc circuit is executed by processor such as any one of claims 1 to 9 institute
The step of switching method for the pfc circuit stated.
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| CN108895632B (en) | 2020-12-11 |
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