CN105804978B - The control device and control method of compressor in air conditioner - Google Patents
The control device and control method of compressor in air conditioner Download PDFInfo
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Abstract
The invention discloses a kind of control method of compressor in air conditioner, it comprises the following steps：Detect the state of the main branch and sub-branch in interleaved PFC circuit；If the main branch is normal condition, and the sub-branch is open-circuit condition, then obtains the input current of air conditioner；And judge the trend state of the input current, and the frequency of compressor in the air conditioner is controlled according to the trend state and the input current.When the control method of compressor main branch in interleaved PFC circuit is normal in the air conditioner, sub-branch is opened a way, air conditioner safe handling can be ensured by controlling the frequency of compressor, improve the reliability of air conditioner.The invention also discloses a kind of control device of compressor in air conditioner.
Description
Technical field
The present invention relates to air conditioner technical field, the control method and one kind of compressor in more particularly to a kind of air conditioner
The control device of compressor in air conditioner.
Background technology
Interleaved PFC on transducer air conditioning (Power Factor Correction, Active PFC) electricity at present
Road, the branch road of two inductance be present, according to input voltage and load current condition, when meeting some requirements, can hold first
One of branch road is opened, the branch road is commonly referred to as main branch, after meeting some requirements, can be then turned on another branch road,
The branch road is commonly referred to as sub-branch；Then meet some requirements, close sub-branch, then meet some requirements, close main branch
Road.
In existing control, major and minor branch road is all fixed, once it is determined that being propped up in pfc circuit based on which branch road
Road, which branch road be sub-branch after, be exactly to immobilize in the life cycle of frequency converter.This will there are the following problems：When
Main branch in pfc circuit is normal, and when sub-branch is opened a way, air conditioner may proceed to by main branch is normal, sub-branch also normal feelings
Condition operates, and so as to which pfc circuit operating will be caused abnormal, results even in air conditioner and shuts down.
The content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
Therefore, it is an object of the present invention to propose a kind of control method of compressor in air conditioner, in interleaved PFC
When main branch is normal in circuit, sub-branch is opened a way, air conditioner safe handling can be ensured by controlling the frequency of compressor, carried
The high reliability of air conditioner.
It is another object of the present invention to the control device for proposing compressor in a kind of air conditioner.
To reach above-mentioned purpose, the control method of compressor in a kind of air conditioner that one aspect of the present invention embodiment proposes,
Comprise the following steps：Detect the state of the main branch and sub-branch in interleaved PFC circuit；If the main branch is normal shape
State, and the sub-branch is open-circuit condition, then obtains the input current of air conditioner；And judge the trend shape of the input current
State, and the frequency of compressor in the air conditioner is controlled according to the trend state and the input current.
The control method of compressor in air conditioner according to embodiments of the present invention, the main branch in interleaved PFC circuit
When for normal condition, sub-branch being open-circuit condition, by obtaining the input current of air conditioner and judging the trend of input current
State is controlled to the frequency of compressor in air conditioner, so as to adjust the running current of compressor not over limit value, is protected
The safe handling of air conditioner is demonstrate,proved, improves the reliability of air conditioner.
According to one embodiment of present invention, according to the trend state and the input current to being pressed in the air conditioner
The frequency of contracting machine is controlled, and is specifically included：When the trend state is increases, if meeting Isa>K1*Ia and Isa<=
K2*Ia, then it according to raising frequency speed is that Nsa=ksa*Na is run to control the compressor, wherein, Isa is the input current, Ia
The rated current born for the main branch, Na are acquiescence raising frequency speed, and ksa be default raising frequency speed proportional factor, k1 with
K2 is respectively default first scale factor and the second scale factor；When the trend state is reduces, if meeting Isa<
=m1*Ia, then the compressor is controlled to be run according to raising frequency speed for Na, wherein, m1 is default 5th scale factor.
According to one embodiment of present invention, according to the trend state and the input current to being pressed in the air conditioner
The frequency of contracting machine is controlled, and is specifically included：When the trend state is increases, if meeting Isa>K2*Ia and Isa<=
K3*Ia, then the running frequency of the compressor is controlled to keep constant, wherein, Isa is the input current, and Ia is the main branch
The rated current that road is born, k3 are default 3rd scale factor；When the trend state is reduces, if meeting Isa<=
M2*Ia, then control the compressor according to raising frequency speed be Nsa=ksa*Na run, wherein, m2 be default 6th ratio because
Son, Na are acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor.
According to one embodiment of present invention, according to the trend state and the input current to being pressed in the air conditioner
The frequency of contracting machine is controlled, and is specifically included：When the trend state is increases, if meeting Isa>K3*Ia and Isa<=
K4*Ia, then the running frequency of the compressor is reduced, wherein, Isa is the input current, and the Ia main branchs are born
Rated current, k3 are default 3rd scale factor, and k4 is default 4th scale factor；When the trend state is reduction
When, if meeting Isa<=m3*Ia, then the compressor is controlled to keep current operation frequency constant, wherein, m3 is default the
Seven scale factors.
According to one embodiment of present invention, if meeting Isa>K4*Ia, then the compressor is controlled to close, wherein,
Isa is the input current, and Ia is the rated current that the main branch is born, and k4 is default 4th scale factor.
According to the example of the present invention, k1<k2<k3<K4=1, ksa 0.2-0.5, m1<m2<m3<1.
To reach above-mentioned purpose, the control dress of compressor in a kind of air conditioner that another aspect of the present invention embodiment proposes
Put, including：Detection module, the detection module are used for the state for detecting main branch and sub-branch in interleaved PFC circuit；Control
Molding block, the control module obtain air conditioner when the main branch is normal condition and the sub-branch is open-circuit condition
Input current, and judge the trend state of the input current, and according to the trend state and the input current to institute
The frequency for stating compressor in air conditioner is controlled.
The control device of compressor in air conditioner according to embodiments of the present invention, interleaved PFC is detected by detection module
The state of main branch and sub-branch in circuit, and the main branch in interleaved PFC circuit is normal condition, sub-branch is to open
During line state, the input current of air conditioner is obtained by control module and judges the trend state of input current come to air conditioner
The frequency of middle compressor is controlled, and so as to adjust the running current of compressor not over limit value, ensures the safety of air conditioner
Operating, improve the reliability of air conditioner.
According to one embodiment of present invention, when the trend state is increases, if meeting Isa>K1*Ia and Isa<
=k2*Ia, the control module then control the compressor to be run according to raising frequency speed for Nsa=ksa*Na, wherein, Isa is
The input current, Ia are the rated current that the main branch is born, and Na is acquiescence raising frequency speed, and ksa is default raising frequency speed
Scale factor is spent, k1 and k2 are respectively default first scale factor and the second scale factor；When the trend state is reduction
When, if meeting Isa<=m1*Ia, the control module then control the compressor to be run according to raising frequency speed for Na, wherein,
M1 is default 5th scale factor.
According to one embodiment of present invention, when the trend state is increases, if meeting Isa>K2*Ia and Isa<
=k3*Ia, the control module then control the running frequency of the compressor to keep constant, wherein, Isa is the input electricity
Stream, Ia are the rated current that the main branch is born, and k3 is default 3rd scale factor；When the trend state is reduction
When, if meeting Isa<=m2*Ia, it according to raising frequency speed is Nsa=ksa*Na that the control module, which then controls the compressor,
Operation, wherein, m2 be default 6th scale factor, and Na is acquiescence raising frequency speed, ksa for default raising frequency speed proportional because
Son.
According to one embodiment of present invention, when the trend state is increases, if meeting Isa>K3*Ia and Isa<
=k4*Ia, the control module then reduce the running frequency of the compressor, wherein, Isa is the input current, and Ia is institute
The rated current that main branch is born is stated, k3 is default 3rd scale factor, and k4 is default 4th scale factor；When it is described become
When gesture state is reduces, if meeting Isa<=m3*Ia, the control module then control the compressor to keep current operation frequency
Rate is constant, wherein, m3 is default 7th scale factor.
According to the example of the present invention, k1<k2<k3<K4=1, ksa 0.2-0.5, m1<m2<m3<1.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the flow chart of the control method of compressor in the air conditioner according to the embodiment of the present invention；
Fig. 2 is the electric current of the main branch and sub-branch in the detection interleaved PFC circuit according to one embodiment of the invention
Schematic diagram；
Fig. 3 is the electricity of the main branch and sub-branch in the detection interleaved PFC circuit according to another embodiment of the present invention
The schematic diagram of stream；
Fig. 4 is the current control compressor frequency with main branch in interleaved PFC circuit according to one embodiment of the invention
The schematic diagram of rate；And
Fig. 5 is the block diagram of the control device of compressor in the air conditioner according to the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only example, and
Purpose does not lie in the limitation present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is the relation between itself not indicating discussed various embodiments and/or setting for purposes of simplicity and clarity again.This
Outside, the invention provides various specific techniques and material examples, but those of ordinary skill in the art can be appreciated that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
" on " structure can include the first and second features and be formed as the embodiment that directly contacts, other feature shape can also be included
Into the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanical connection or electrical connection or the connection of two element internals, can
To be to be joined directly together, can also be indirectly connected by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The control method and sky of compressor in the air conditioner proposed according to embodiments of the present invention described with reference to the accompanying drawings
Adjust the control device of compressor in device.
Fig. 1 is the flow chart of the control method of compressor in the air conditioner according to the embodiment of the present invention.As shown in figure 1, should
The control method of compressor comprises the following steps in air conditioner：
S1, detect the state of the main branch and sub-branch in interleaved PFC circuit.
Wherein, sub-branch can be judged whether by detecting the electric current of main branch in interleaved PFC circuit and sub-branch
For open-circuit condition.
Specifically, as shown in Fig. 2 the controller in air conditioner can preset appointing in interleaved PFC circuit by software
A branch road of anticipating is main branch, such as preset resistance R1 this branch road is main branch, then this branch road of resistance R2 is sub-branch.It is logical
The voltage crossed on detection resistance R1 and resistance R2, then controller conversion is carried out to it again and is obtained with main branch and sub-branch
Electric current, so as to judge whether sub-branch is in open-circuit condition.
Or as shown in figure 3, the controller in air conditioner can be preset by software it is any one in interleaved PFC circuit
Branch road is main branch, such as preset resistance R1 this branch road is main branch, then this branch road of switching tube Q2 is sub-branch, is passed through
Resistance R3 electric current is the electric current sum of the two branch roads.By the voltage on detection resistance R1 and resistance R3, then controller
Electric current and total current that conversion is obtained with main branch are carried out to it again, the electric current of sub-branch subtracts main branch for total current
Electric current, then it can determine whether out whether sub-branch is in open-circuit condition according to the electric current of main branch and sub-branch.
S2, if main branch is normal condition, and sub-branch is open-circuit condition, then obtains the input current of air conditioner.
S3, judge the trend state of input current, and according to trend state and input current to compressor in air conditioner
Frequency is controlled.
Further, in step s 2, the rated current Ia and the acquiescence raising frequency speed of compressor that also acquisition main branch is born
Spend Na such as 1 hertz/secs.
Therefore, according to one embodiment of present invention, in step S3, according to trend state and input current in air conditioner
The frequency of compressor is controlled, and is specifically included：When trend state is increases, if meeting Isa>K1*Ia and Isa<=k2*
Ia, then compressor is controlled to be run according to raising frequency speed for Nsa=ksa*Na, wherein, Isa is input current, and Ia holds for main branch
The rated current received, Na are acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor, and k1 and k2 are respectively default
First scale factor and the second scale factor；When trend state is reduces, if meeting Isa<=m1*Ia, then control compression
Machine is run according to raising frequency speed for Na, wherein, m1 is default 5th scale factor.
Also, according to one embodiment of present invention, in step S3, according to trend state and input current in air conditioner
The frequency of compressor is controlled, and specifically may also include：When trend state is increases, if meeting Isa>K2*Ia and Isa<
=k3*Ia, then the running frequency of compressor is controlled to keep constant, wherein, Isa is the input current, and Ia is the main branch
The rated current born, k3 are default 3rd scale factor；When the trend state is reduces, if meeting Isa<=
M2*Ia, then control the compressor according to raising frequency speed be Nsa=ksa*Na run, wherein, m2 be default 6th ratio because
Son, Na are acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor.
According to one embodiment of present invention, in step S3, according to trend state and input current to being compressed in air conditioner
The frequency of machine is controlled, and specifically may also include：When the trend state is increases, if meeting Isa>K3*Ia and Isa<
=k4*Ia, then the running frequency of the compressor is reduced, wherein, Isa is the input current, and Ia is that the main branch is born
Rated current, k3 is default 3rd scale factor, and k4 is default 4th scale factor；When the trend state is reduction
When, if meeting Isa<=m3*Ia, then the compressor is controlled to keep current operation frequency constant, wherein, m3 is default the
Seven scale factors.
In addition, in an embodiment of the present invention, if meeting Isa>K4*Ia, then the compressor is controlled to close, wherein,
Isa is the input current, and Ia is the rated current that the main branch is born, and k4 is default 4th scale factor.
Wherein, specifically, according to the example of the present invention, k1<k2<k3<K4=1, ksa can be 0.2-0.5, m1<
m2<m3<1。
In summary, as shown in figure 4, when the trend state of the input current of air conditioner is increases, if meeting Isa>
K1*Ia and Isa<=k2*Ia, the raising frequency speed for reducing compressor is Nsa=ksa*Na, limits the raising frequency speed of compressor；When
When the trend state of the input current of air conditioner is reduces, if meeting Isa<=m1*Ia, the raising frequency speed for recovering compressor are
Na, that is, control the normal raising frequency of compressor.When the trend state of the input current of air conditioner is increases, if meeting Isa>k2*
Ia and Isa<=k3*Ia, keep the current operation frequency of compressor constant；When the trend state of the input current of air conditioner is to subtract
Hour, if meeting Isa<=m2*Ia, control compressor to be run by raising frequency speed for Nsa=ksa*Na, limit the liter of compressor
Frequency speed.When the trend state of the input current of air conditioner is reduces, if meeting Isa>K3*Ia and Isa<=k4*Ia, drop
The running frequency of low compressor；When the trend state of the input current of air conditioner is reduces, if meeting Isa<=m3*Ia,
Compressor is controlled to keep current operation frequency constant.
Also, if meet Isa>K4*Ia, then close compressor.
That is, in an embodiment of the present invention, judge whether pair by detecting the electric current of main branch and sub-branch
Leg open, if sub-branch is opened a way, the electric current for controlling main branch is that the input current of air conditioner is no more than preset value.Its
In, what preset value can divide to realize protection, when the input current of air conditioner increases and more than the first preset value I1, control pressure
Contracting machine reduces current operation frequency, compressor current value is less than preset value；When detecting that input current is more than the second preset value
I2, controlling the current raising frequency speed of compressor reduces so that and the electric current rate of climb of compressor reduces, wherein, I2<I1；Work as inspection
Measure input current and be more than the 3rd preset value I3, and I2<I3<I1, keep the current operation frequency of compressor constant；When detecting
Input current is more than the 4th preset value I4, and I2<I3<I1<I4, control compressor are directly shut down.It should be noted that this four
Preset value is different specific to different compressor types, and its parameter determines especially by experiment.
Specifically, in the example of the present invention, illustrated by taking a cabinet type convertible frequency air-conditioner of 3P as an example, the frequency conversion is empty
It is 18A to modulate the electric current under cold normal operating conditions.First, by detecting the electric current of main branch and sub-branch in pfc circuit,
And judge whether that sub-branch is opened a way, if sub-branch is opened a way, the electric current of control main branch is no more than preset value.Because main branch
Electric current is equal to 18A plus sub-branch electric current, so the half that the electric current preset value for needing main branch is 18A, i.e. 9A.Work as main branch
Electric current when being more than 9A, direct close compressor.When the electric current of main branch is more than 0.97*9A=8.73A, compressor is reduced
Running frequency；When the electric current of main branch is less than or equal to 0.92*9A=8.28A, the limit frequency state of compressor is exited, keeps compression
The current operation frequency of machine is constant.When the electric current of main branch is more than 0.95*9A=8.55A, the current operation of compressor is kept
Frequency is constant；When the electric current of main branch is less than or equal to 0.9*9A=8.1, compressor frequency hold mode, limitation compression are exited
The raising frequency speed of machine.When the electric current of main branch is more than 0.91*9A=8.19, the raising frequency speed of compressor, usual raising frequency are reduced
Speed is 1 hertz/sec, is reduced to 0.4 hertz/sec；When the electric current of main branch is less than or equal to 0.87*9A=7.83, compression is exited
Machine raising frequency rate limitation state, control compressor carry out raising frequency with usual raising frequency speed such as 1 hertz/sec.
The control method of compressor in air conditioner according to embodiments of the present invention, the main branch in interleaved PFC circuit
When for normal condition, sub-branch being open-circuit condition, by obtaining the input current of air conditioner and judging the trend of input current
State is controlled to the frequency of compressor in air conditioner, so as to adjust the running current of compressor not over limit value, is protected
The safe handling of air conditioner is demonstrate,proved, improves the reliability of air conditioner.
Fig. 5 is the block diagram of the control device of compressor in the air conditioner according to the embodiment of the present invention.Such as Fig. 5 institutes
Show, the control device of compressor includes detection module 10 and control module 20 in the air conditioner.
Wherein, detection module 10 is used for the state for detecting main branch and sub-branch in interleaved PFC circuit, control module
20 obtain the input current of air conditioner when main branch is normal condition and sub-branch is open-circuit condition, and judge input current
Trend state, and the frequency of compressor in air conditioner is controlled according to trend state and input current.
According to one embodiment of present invention, when trend state is increases, if meeting Isa>K1*Ia and Isa<=
K2*Ia, control module 20 then control compressor to be run according to raising frequency speed for Nsa=ksa*Na, wherein, Isa is input current,
Ia is the rated current that main branch is born, and Na is acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor, k1 and k2
Respectively default first scale factor and the second scale factor；When the trend state is reduces, if meeting Isa<=
M1*Ia, control module 20 then control the compressor to be run according to raising frequency speed for Na, wherein, m1 is default 5th ratio
The factor.
Also, according to one embodiment of present invention, when the trend state is increases, if meeting Isa>k2*Ia
And Isa<=k3*Ia, control module 20 then control the running frequency of compressor to keep constant, wherein, Isa is the input electricity
Stream, Ia are the rated current that the main branch is born, and k3 is default 3rd scale factor；When the trend state is reduction
When, if meeting Isa<=m2*Ia, control module 20 then control the compressor to be transported according to raising frequency speed for Nsa=ksa*Na
OK, wherein, m2 is default 6th scale factor, and Na is acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor.
According to one embodiment of present invention, when the trend state is increases, if meeting Isa>K3*Ia and Isa<
=k4*Ia, control module 20 then reduce the running frequency of compressor, wherein, Isa is the input current, and Ia is the main branch
The rated current that road is born, k3 are default 3rd scale factor, and k4 is default 4th scale factor；When the trend state
During to reduce, if meeting Isa<=m3*Ia, control module 20 then control the compressor to keep current operation frequency constant,
Wherein, m3 is default 7th scale factor.
In addition, in an embodiment of the present invention, if meeting Isa>K4*Ia, control module 20 then control compressor to close,
Wherein, Isa is the input current, and Ia is the rated current that the main branch is born, and k4 is default 4th scale factor.
Specifically, according to the example of the present invention, k1<k2<k3<K4=1, ksa 0.2-0.5, m1<m2<m3<1.
The control device of compressor in air conditioner according to embodiments of the present invention, interleaved PFC is detected by detection module
The state of main branch and sub-branch in circuit, and the main branch in interleaved PFC circuit is normal condition, sub-branch is to open
During line state, the input current of air conditioner is obtained by control module and judges the trend state of input current come to air conditioner
The frequency of middle compressor is controlled, and so as to adjust the running current of compressor not over limit value, ensures the safety of air conditioner
Operating, improve the reliability of air conditioner.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that by program the hardware of correlation can be instructed to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (12)
1. the control method of compressor in a kind of air conditioner, it is characterised in that comprise the following steps：
Detect the state of the main branch and sub-branch in interleaved PFC circuit；
If the main branch is normal condition, and the sub-branch is open-circuit condition, then obtains the input current of air conditioner；With
And
Judge the trend state of the input current, and according to the trend state and the input current in the air conditioner
The frequency of compressor is controlled.
2. the control method of compressor in air conditioner as claimed in claim 1, it is characterised in that according to the trend state and
The input current is controlled to the frequency of compressor in the air conditioner, is specifically included：
When the trend state is increases, if meeting Isa>K1*Ia and Isa<=k2*Ia, then the compressor is controlled to press
Run according to raising frequency speed for Nsa=ksa*Na, wherein, Isa is the input current, and Ia is the specified electricity that the main branch is born
Stream, Na are acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor, k1 and k2 be respectively default first ratio because
Son and the second scale factor；
When the trend state is reduces, if meeting Isa<=m1*Ia, then control the compressor to be according to raising frequency speed
Na is run, wherein, m1 is default 5th scale factor.
3. the control method of compressor in air conditioner as claimed in claim 1 or 2, it is characterised in that according to the trend shape
State and the input current are controlled to the frequency of compressor in the air conditioner, are specifically included：
When the trend state is increases, if meeting Isa>K2*Ia and Isa<=k3*Ia, then control the compressor
Running frequency keeps constant, wherein, Isa is the input current, and Ia is the rated current that the main branch is born, and k3 is default
The 3rd scale factor；
When the trend state is reduces, if meeting Isa<=m2*Ia, then control the compressor to be according to raising frequency speed
Nsa=ksa*Na is run, wherein, m2 is default 6th scale factor, and Na is acquiescence raising frequency speed, and ksa is default raising frequency
Speed proportional factor.
4. the control method of compressor in air conditioner as claimed in claim 1, it is characterised in that according to the trend state and
The input current is controlled to the frequency of compressor in the air conditioner, is specifically included：
When the trend state is increases, if meeting Isa>K3*Ia and Isa<=k4*Ia, then reduce the compressor
Running frequency, wherein, Isa is the input current, and Ia is the rated current that the main branch is born, and k3 is the default 3rd ratio
The example factor, k4 is default 4th scale factor；
When the trend state is reduces, if meeting Isa<=m3*Ia, then the compressor is controlled to keep current operation frequency
Rate is constant, wherein, m3 is default 7th scale factor.
5. the control method of compressor in air conditioner as claimed in claim 1, it is characterised in that if meeting Isa>K4*Ia,
The compressor is then controlled to close, wherein, Isa is the input current, and Ia is the rated current that the main branch is born, and k4 is
Default 4th scale factor.
6. the control method of compressor in air conditioner as claimed in claim 4, it is characterised in that k1<k2<k3<K4=1, ksa
For 0.2-0.5, m1<m2<m3<1.
A kind of 7. control device of compressor in air conditioner, it is characterised in that including：
Detection module, the detection module are used for the state for detecting main branch and sub-branch in pfc circuit；
Control module, the control module obtain sky when the main branch is normal condition and the sub-branch is open-circuit condition
The input current of device is adjusted, and judges the trend state of the input current, and according to the trend state and the input electricity
Flow and the frequency of compressor in the air conditioner is controlled.
8. the control device of compressor in air conditioner as claimed in claim 7, it is characterised in that
When the trend state is increases, if meeting Isa>K1*Ia and Isa<=k2*Ia, the control module then control
The compressor is run according to raising frequency speed for Nsa=ksa*Na, wherein, Isa is the input current, and Ia is the main branch
The rated current born, Na are acquiescence raising frequency speed, and ksa is default raising frequency speed proportional factor, and k1 and k2 are respectively default
The first scale factor and the second scale factor；
When the trend state is reduces, if meeting Isa<=m1*Ia, the control module then control the compressor to press
Run according to raising frequency speed for Na, wherein, m1 is default 5th scale factor.
9. the control device of compressor in air conditioner as claimed in claim 7 or 8, it is characterised in that
When the trend state is increases, if meeting Isa>K2*Ia and Isa<=k3*Ia, the control module then control
The running frequency of the compressor keeps constant, wherein, Isa is the input current, and Ia bears specified for the main branch
Electric current, k3 are default 3rd scale factor；
When the trend state is reduces, if meeting Isa<=m2*Ia, the control module then control the compressor to press
Run according to raising frequency speed for Nsa=ksa*Na, wherein, m2 is default 6th scale factor, and Na is to give tacit consent to raising frequency speed, ksa
For default raising frequency speed proportional factor.
10. the control device of compressor in air conditioner as claimed in claim 7, it is characterised in that
When the trend state is increases, if meeting Isa>K3*Ia and Isa<=k4*Ia, the control module then reduce
The running frequency of the compressor, wherein, Isa is the input current, and Ia is the rated current that the main branch is born, and k3 is
Default 3rd scale factor, k4 are default 4th scale factor；
When the trend state is reduces, if meeting Isa<=m3*Ia, the control module then control the compressor to protect
It is constant to hold current operation frequency, wherein, m3 is default 7th scale factor.
11. the control device of compressor in air conditioner as claimed in claim 7, it is characterised in that if meeting Isa>k4*
Ia, the control module then control the compressor to close, wherein, Isa is the input current, and Ia is that the main branch is born
Rated current, k4 is default 4th scale factor.
12. the control device of compressor in air conditioner as claimed in claim 10, it is characterised in that k1<k2<k3<K4=1,
Ksa is 0.2-0.5, m1<m2<m3<1.
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| CN108089111A (en) * | 2017-11-06 | 2018-05-29 | 珠海格力电器股份有限公司 | Interleaved PFC fault detection method and device |
| CN108254675A (en) * | 2018-03-14 | 2018-07-06 | 奥克斯空调股份有限公司 | Pfc circuit failure detector, method and convertible frequency air-conditioner |
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| CN1303171A (en) * | 1999-11-30 | 2001-07-11 | 松下电器产业株式会社 | Linear compressor driving device, medium and information assembly |
| CN101867283A (en) * | 2010-06-13 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for improving control characteristic of power factor correction |
| CN203104280U (en) * | 2013-01-04 | 2013-07-31 | 广东美的制冷设备有限公司 | Interleaving PFC circuit and air conditioner |
| CN104135002A (en) * | 2014-07-11 | 2014-11-05 | 邯郸美的制冷设备有限公司 | Staggered power factor corrector |
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| JP2005344647A (en) * | 2004-06-04 | 2005-12-15 | Denso Corp | Drive control device of electric compressor for automobile |
| JP2009055719A (en) * | 2007-08-28 | 2009-03-12 | Max Co Ltd | Air compressor and motor drive control method |
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| CN1303171A (en) * | 1999-11-30 | 2001-07-11 | 松下电器产业株式会社 | Linear compressor driving device, medium and information assembly |
| CN101867283A (en) * | 2010-06-13 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for improving control characteristic of power factor correction |
| CN203104280U (en) * | 2013-01-04 | 2013-07-31 | 广东美的制冷设备有限公司 | Interleaving PFC circuit and air conditioner |
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