CN108895634A - A kind of compressor control method and device - Google Patents
A kind of compressor control method and device Download PDFInfo
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- CN108895634A CN108895634A CN201810837240.5A CN201810837240A CN108895634A CN 108895634 A CN108895634 A CN 108895634A CN 201810837240 A CN201810837240 A CN 201810837240A CN 108895634 A CN108895634 A CN 108895634A
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- driving circuit
- electric current
- compressor
- presetting
- current
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Classifications
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
Abstract
The present invention provides a kind of compressor control method and devices, are related to air conditioner technical field.This method and device are by obtaining source current, the first electric current, the second electric current, input current and input voltage; and judge whether driving circuit is abnormal based on source current, the first electric current and the second electric current; to when driving circuit abnormality; practical frequency reducing protection value is determined according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient; and the operation power of compressor is calculated according to input current and input voltage, the running frequency of compressor is then reduced until operation power is less than or equal to practical frequency reducing protection value；When due to determining driving circuit abnormality; it determines that the practical frequency reducing protection value of compressor and reduces the running frequency of compressor; until the power of compressor reaches within safe range; the load of driving circuit is reduced in time; it ensure that driving circuit operates normally; so that air conditioner can continue to work, sense that the user experience is improved.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of compressor control method and device.
Background technique
Interleaved PFC on transducer air conditioning (Power Factor Correction, Active PFC) electricity at present
Road, there are the branches of two inductance, according to input voltage and load current condition, when meeting some requirements, can hold first
One of branch is opened, after meeting some requirements, another branch can be then turned on,；Then it meets some requirements, meeting
Two branches are opened simultaneously.
In existing control, when two branches are run simultaneously, if one of leg open, air-conditioning still can be according to
The normal situation operating of two branches will lead to pfc circuit operating exception, very to cause biggish load to pfc circuit
It shuts down to will lead to air conditioner.
Summary of the invention
In view of this, the present invention is directed to propose a kind of compressor control method and device, to solve the above problems.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
In a first aspect, being applied to an air conditioner the present invention provides a kind of compressor control method, the air conditioner includes
Controller, driving circuit and compressor, the controller, the driving circuit and the compressor are sequentially connected electrically and are electrically connected
It connects, the driving circuit includes power supply, the first inductance and the second inductance, the power supply and first inductance and described the
Two inductance are electrically connected, first inductance and second inductance in parallel, and the compressor control method includes：
Obtain source current, the first electric current for flowing through first inductance, the second electric current, defeated for flowing through second inductance
Enter to the input current of the compressor and input voltage；
Judge whether the driving circuit is abnormal based on the source current, first electric current and second electric current；
When the driving circuit abnormality, according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient
Determine practical frequency reducing protection value；
The operation power of the compressor is calculated according to the input current and the input voltage；
The running frequency of the compressor is reduced until the operation power is less than or equal to the practical frequency reducing protection value.
Further, it is described when the driving circuit abnormality according to presetting normal frequency reducing protection value and presetting
First proportionality coefficient determines that the step of practical frequency reducing protection value includes：
When the driving circuit abnormality, by the presetting normal frequency reducing protection value and the first presetting ratio
The product of example coefficient is determined as the practical frequency reducing protection value, wherein 0<k<1, wherein k is the first presetting proportionality coefficient.
Further, described that the driving is judged based on the source current, first electric current and second electric current
Whether Yi Chang step includes circuit：
When the source current is greater than presetting protective current threshold value, first electric current or second electricity are judged
Whether stream is greater than or equal to presetting current threshold；
When first electric current or second electric current are less than or equal to the presetting current threshold, determine described in
Driving circuit abnormality.
Further, the compressor control method further includes：
The driving is determined when first electric current and second electric current are all larger than the presetting current threshold
Circuit is normal.
Further, the compressor control method further includes：
When the driving circuit abnormality, alarm command is generated.
Second aspect, the present invention also provides a kind of compressor control devices, are applied to an air conditioner, the air conditioner packet
Controller, driving circuit and compressor are included, the controller, the driving circuit and the compressor are sequentially connected electrically electricity
Connection, the driving circuit include power supply, the first inductance and the second inductance, the power supply and first inductance and described
Second inductance is electrically connected, first inductance and second inductance in parallel, and the compressor control device includes：
Parameter acquiring unit, for obtaining source current, the first electric current for flowing through first inductance, flowing through described second
Second electric current of inductance, the input current and input voltage for being input to the compressor；
Judging unit, for judging the driving based on the source current, first electric current and second electric current
Whether circuit is abnormal；
Practical frequency reducing protection value determination unit is used for when the driving circuit abnormality, according to presetting normal frequency reducing
Protection value and the first presetting proportionality coefficient determine practical frequency reducing protection value；
Computing unit, for calculating the operation power of the compressor according to the input current and the input voltage；
Running frequency adjustment unit, for reducing the compressor running frequency until the operation power is less than or waits
In the practical frequency reducing protection value.
Further, the practical frequency reducing protection value determination unit is used for when the driving circuit abnormality, will be described pre-
The normal frequency reducing protection value of setting and the product of the first presetting proportionality coefficient are determined as the practical frequency reducing protection value,
Wherein, 0<k<1, wherein k is the first presetting proportionality coefficient.
Further, the judging unit is used to sentence when the source current is greater than presetting protective current threshold value
Break first electric current or whether second electric current is greater than or equal to presetting current threshold；
The judging unit is also used to work as first electric current or second electric current less than or equal to described presetting
When current threshold, the driving circuit abnormality is determined.
Further, the judging unit is also used to be all larger than described preset when first electric current and second electric current
Determine that the driving circuit is normal when fixed current threshold.
Further, the compressor control device further includes：
Instruction generation unit, for generating alarm command when the driving circuit abnormality.
Compared with the existing technology, compressor control method and device of the present invention have the advantage that：
By acquisition source current, the first electric current for flowing through the first inductance, the second electric current for flowing through the second inductance, it is input to
The input current and input voltage of compressor, and whether driving circuit is judged based on source current, the first electric current and the second electric current
It is abnormal, thus when driving circuit abnormality, it is true according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient
Fixed practical frequency reducing protection value, and according to input current and the operation power of input voltage calculating compressor, then reduce compressor
Running frequency until operation power be less than or equal to practical frequency reducing protection value；When due to determining driving circuit abnormality, determine that
The practical frequency reducing protection value of compressor and the running frequency for reducing compressor, until the power of compressor reaches within safe range
Until, the load of driving circuit is reduced in time, ensure that driving circuit operates normally, so that air conditioner can continue to work
Make, sense that the user experience is improved.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the circuit structure block diagram of air conditioner provided in an embodiment of the present invention.
Fig. 2 is the circuit diagram of driving circuit provided in an embodiment of the present invention.
Fig. 3 is the flow chart of compressor control method provided in an embodiment of the present invention.
Fig. 4 is the specific flow chart of compressor control method provided in an embodiment of the present invention.
Fig. 5 is the functional block diagram of compressor control device provided in an embodiment of the present invention.
Appended drawing reference：1- air conditioner；2- controller；3- memory；4- driving circuit；41- power supply；42- rectifier bridge；43-
Pfc circuit；5- compressor；6- current acquisition module；7- compressor control device；8- parameter acquiring unit；9- judging unit；
The practical frequency reducing protection value determination unit of 10-；11- computing unit；12- running frequency adjustment unit.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
The present invention provides a kind of air conditioners 1, can also appointing in pfc circuit 43 while for adjusting room temperature
When one leg open, still it can work on.Referring to Fig. 1, being the circuit structure frame of air conditioner 1 provided in an embodiment of the present invention
Figure.The air conditioner 1 includes：Controller 2, memory 3, driving circuit 4, compressor 5, current acquisition module 6 and compressor control
Device 7 processed, wherein controller 2 is electrically connected with memory 3, driving circuit 4, compressor 5 and current acquisition module 6.The pressure
Contracting machine control device 7 includes that at least one can be stored in the memory 3 in the form of software or firmware (firmware).
Wherein, memory 3 can be used for storing software program and unit, such as the compressor control dress in the embodiment of the present invention
Set program instruction/unit corresponding to 7 and method, the compressor control device that controller 2 is stored in memory 3 by operation
7, the software program and unit of method provides thereby executing various function application and data processing, such as embodiment of the present invention
Compressor control method.Wherein, the memory 3 may be, but not limited to, random access memory (Random Access
Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable
Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only
Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only
Memory, EEPROM) etc..
Driving circuit 4 is for driving compressor 5 to run.Specifically, referring to Fig. 2, being drive provided in an embodiment of the present invention
The circuit diagram of dynamic circuit 4.The driving circuit 4 include power supply 41, rectifier bridge 42, pfc circuit 43 and bus capacitor C, power supply 41,
Rectifier bridge 42, pfc circuit 43, bus capacitor C and compressor 5 are sequentially connected electrically.
In addition, pfc circuit 43 includes the first inductance L1, the second inductance L2, first switch tube Q1, second switch Q2, the
One diode D1 and the second diode D2.Wherein, the first output end of rectifier bridge 42, the first inductance L1, first diode D1,
Bus capacitor C is sequentially connected in series, the second inductance L2 connect with the second diode D2 after with the first inductance L1 and first diode D1 simultaneously
Connection, first switch tube Q1 are series between the first inductance L1 and the second output terminal of rectifier bridge 42, and second switch Q2 is series at
Between second inductance L2 and the second output terminal of rectifier bridge 42,2 electricity of control signal input and controller of first switch tube Q1
Connection, the control signal input of second switch Q2 are electrically connected with controller 2.
Current acquisition module 6 is for acquiring source current, the first electric current for flowing through the first inductance L1, flowing through the second inductance L2
The second electric current and be input to the input current of compressor 5, and by source current, the first electric current, the second electric current and input
Electric current is transmitted to controller 2.
Specifically, current acquisition module 6 includes the first current sensor, the second current sensor, third current sensor
And the 4th current sensor, and the first current sensor, the second current sensor, third current sensor and the 4th electric current
Sensor is electrically connected with controller 2.
Wherein, the first current sensor is series between power supply 41 and rectifier bridge 42, for acquiring source current；Second electricity
Flow sensor is series between the first inductance L1 and first diode D1 and the node of first switch tube Q1, flows through for acquiring
The first electric current of one inductance L1；Third current sensor is series at the second inductance L2 and the second diode D2 and second switch Q2
Node between, for acquiring the second electric current for flowing through the second inductance L2；4th current sensor is series at bus capacitor C and pressure
Between contracting machine 5, for acquiring the input current for being input to compressor 5.
First embodiment
The embodiment of the invention provides a kind of compressor control methods, are applied to air conditioner 1, for according to pfc circuit 43
Actual conditions, adjust compressor 5 operation power, guarantee there is any one path loss bad when even if pfc circuit 43 with this, still can
The normal work of air conditioner 1 is maintained, and does not damage air conditioner 1.Referring to Fig. 3, being compressor control provided in an embodiment of the present invention
The flow chart of method processed.The compressor control method includes：
Step S301：Acquisition source current, the first electric current for flowing through the first inductance L1, the second electricity for flowing through the second inductance L2
Flow, be input to the input current and input voltage of compressor 5.
It is to be appreciated that source current, the first electric current, the second electric current and input current can be adopted by current acquisition module 6
Collection obtains；And the input voltage for being input to compressor 5 is after controller 2 carries out closed-loop control, the electricity that control driving circuit 4 exports
Pressure, directly reads.
Step S302：Judge whether driving circuit 4 is abnormal based on source current, the first electric current and the second electric current, if so,
Then follow the steps S303；If it is not, then re-executeing the steps S301.
Specifically, referring to Fig. 4, being the specific flow chart of compressor control method provided in an embodiment of the present invention.The step
Suddenly S302 includes：
Sub-step S3021：Judge whether source current is greater than presetting protective current threshold value, if it is, executing son
Step S3022；If it is not, then re-executeing the steps S301.
It should be noted that presetting protective current threshold value is the model of foundation air conditioner 1, the decision of the size of load
, load is bigger, then protective current threshold value is relatively high；Conversely, load is smaller, then protective current threshold value is lower.
The purpose for judging whether source current is greater than presetting protective current threshold value is, determines the negative of driving circuit 4
Situation is carried, the erroneous judgement to pfc circuit 43 in driving circuit 4 is avoided.
Specifically, when source current is greater than presetting protective current threshold value, show that the load of driving circuit 4 is heavier,
Two branches of pfc circuit 43 are needed to work at the same time and could bear；And when source current is less than or equal to presetting protection electricity
When flowing threshold value, show only to need wherein working all the way in pfc circuit 43 just can bear.
Sub-step S3022：Judge whether the first electric current or the second electric current are less than or equal to presetting current threshold, if
It is then to execute sub-step S3023；If it is not, then executing sub-step S3024.
It should be noted that the presetting current threshold is related with pfc circuit 43.Once pfc circuit 43 determines, then should
Presetting current threshold then determines.Specifically, which is that each branch of pfc circuit 43 can bear
Maximum current and the second proportionality coefficient product, wherein the circuit component types of second proportionality coefficient and pfc circuit 43,
Relating to parameters.
It should also be noted that, the presetting current threshold is the value of a very little, such as 1A, 2A.
Sub-step S3023：Determine that driving circuit 4 is abnormal.
When any one in the first electric current or the second electric current is less than presetting current threshold, show to be less than presetting
Current threshold electric current corresponding to branch disconnect, so that it is determined that driving circuit 4 is abnormal.
Sub-step S3024：Determine that driving circuit 4 is normal.
When the first electric current and the second electric current are all larger than presetting current threshold, show that two branches are both turned on, therefore
Determine that driving circuit 4 is normal.
Step S303：Practical frequency reducing is determined according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient
Protection value.
Specifically, the product of presetting normal frequency reducing protection value and the first presetting proportionality coefficient is determined as reality
Frequency reducing protection value.
It should be noted that set the first presetting proportionality coefficient as k, then 0<k<1.First proportionality coefficient k can be
1/2,1/3 or 2/5 etc., it is not particularly limited herein, meets 0<k<1 condition.
To which when driving circuit 4 is abnormal, practical frequency reducing protection value should be less than presetting normal frequency reducing protection
Value.
When driving circuit 4 is abnormal, if maintaining the state of former high load always, the damage of driving circuit 4 will lead to, seriously
It is out of service to result even in air conditioner 1.Therefore, the frequency reducing protection value of air conditioner 1 is reduced, at this time to guarantee the peace of air conditioner 1
Entirely.
Step S304：The operation power of compressor 5 is calculated according to input current and input voltage.
It should be noted that needing to obtain into electric current and input voltage in real time, to calculate the operation function of compressor 5 in real time
Rate.
Step S305：The running frequency of compressor 5 is reduced until operation power is less than or equal to practical frequency reducing protection value.
When driving circuit 4 is abnormal, if maintaining the state of former high load always, the damage of driving circuit 4 will lead to, seriously
It is out of service to result even in air conditioner 1.Therefore, need the running frequency for reducing compressor 5 to reduce the fortune of compressor 5 at this time
Row power.
When running power less than or equal to practical frequency reducing protection value, show that the operation power of compressor 5 has already decreased to
In the range of driving circuit 4 under abnormality is able to bear, therefore the operation frequency for being further continued for reducing compressor 5 is not just had to
Rate.
Second embodiment
Referring to Fig. 5, Fig. 5 is a kind of functional block diagram of compressor control device 7 provided in an embodiment of the present invention.It needs
Illustrate, compressor control device 7 provided by the present embodiment, the technical effect and above-mentioned implementation of basic principle and generation
Example is identical, and to briefly describe, the present embodiment part does not refer to place, can refer to corresponding contents in the above embodiments.The compression
Machine control device 7 include parameter acquiring unit 8, judging unit 9, practical frequency reducing protection value determination unit 10, computing unit 11 with
And running frequency adjustment unit 12.
Wherein, parameter acquiring unit 8 is for obtaining source current, the first electric current for flowing through the first inductance L1, flowing through second
The second electric current of inductance L2, the input current and input voltage for being input to compressor 5.
It is to be appreciated that the parameter acquiring unit 8 can be used for executing step S301 in a kind of preferred embodiment.
Judging unit 9 is used to judge based on source current, the first electric current and the second electric current whether driving circuit 4 to be abnormal.
Specifically, judging unit 9 is for judging whether source current is greater than presetting protective current threshold value, and is used to work as
When source current is greater than presetting protective current threshold value, it is presetting to judge whether the first electric current or the second electric current are greater than or equal to
Current threshold, if it is, determining that driving circuit 4 is abnormal；If it is not, then determining that driving circuit 4 is normal.
It is to be appreciated that the judging unit 9 can be used for executing step S302, sub-step in a kind of preferred embodiment
S3021, sub-step S3022, sub-step S3023, sub-step S3024.
Practical frequency reducing protection value determination unit 10 is used to protect when driving circuit 4 is abnormal according to presetting normal frequency reducing
Shield value and the first presetting proportionality coefficient determine practical frequency reducing protection value.
Specifically, practical frequency reducing protection value determination unit 10 is used for when driving circuit 4 is abnormal, by presetting normal drop
Frequency protection value and the product of the first presetting proportionality coefficient are determined as practical frequency reducing protection value, wherein 0<k<1, wherein k is
The first presetting proportionality coefficient.
It is to be appreciated that the practical frequency reducing protection value determination unit 10 can be used for executing in a kind of preferred embodiment
Step S303.
Computing unit 11 is used to calculate the operation power of compressor 5 according to input current and input voltage.
It is to be appreciated that the computing unit 11 can be used for executing step S304 in a kind of preferred embodiment.
Running frequency adjustment unit 12 is less than or equal to reality until running power for reducing the running frequency of compressor 5
Frequency reducing protection value.
It is to be appreciated that the running frequency adjustment unit 12 can be used for executing step in a kind of preferred embodiment
S305。
In conclusion compressor control method provided in an embodiment of the present invention and device, by obtaining source current, flowing through
First electric current of the first inductance, the second electric current for flowing through the second inductance, the input current and input voltage for being input to compressor, and
It is whether abnormal that driving circuit is judged based on source current, the first electric current and the second electric current, thus when driving circuit abnormality, foundation
Presetting normal frequency reducing protection value and the first presetting proportionality coefficient determine practical frequency reducing protection value, and according to input current
And input voltage calculates the operation power of compressor, then reduces the running frequency of compressor until operation power is less than or equal to
Practical frequency reducing protection value；When due to determining driving circuit abnormality, determines that the practical frequency reducing protection value of compressor and reduce compression
The running frequency of machine reduces the load of driving circuit until the power of compressor reaches within safe range in time, guarantees
Driving circuit normal operation, so that air conditioner can continue to work, sense that the user experience is improved.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of compressor control method, which is characterized in that be applied to an air conditioner (1), the air conditioner (1) includes controller
(2), driving circuit (4) and compressor (5), the controller (2), the driving circuit (4) and the compressor (5) according to
Secondary electrical connection electrical connection, the driving circuit (4) includes power supply (41), the first inductance and the second inductance, the power supply (41)
It is electrically connected with first inductance and second inductance, first inductance and second inductance in parallel, the pressure
Contracting machine control method includes：
Acquisition source current, the second electric current for flowing through second inductance, is input to the first electric current for flowing through first inductance
The input current and input voltage of the compressor (5)；
Judge whether the driving circuit (4) is abnormal based on the source current, first electric current and second electric current；
When the driving circuit (4) exception, according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient
Determine practical frequency reducing protection value；
The operation power of the compressor (5) is calculated according to the input current and the input voltage；
The running frequency of the compressor (5) is reduced until the operation power is less than or equal to the practical frequency reducing protection value.
2. compressor control method according to claim 1, which is characterized in that described when the driving circuit (4) are abnormal
When the step of determining practical frequency reducing protection value according to presetting normal frequency reducing protection value and the first presetting proportionality coefficient wrap
It includes：
When the driving circuit (4) exception, by the presetting normal frequency reducing protection value and the first presetting ratio
The product of example coefficient is determined as the practical frequency reducing protection value, wherein 0<k<1, wherein k is the first presetting proportionality coefficient.
3. compressor control method according to claim 1, which is characterized in that described based on the source current, described
First electric current and second electric current judge whether Yi Chang step includes the driving circuit (4)：
When the source current is greater than presetting protective current threshold value, judges first electric current or second electric current is
It is no to be greater than or equal to presetting current threshold；When first electric current or second electric current are less than or equal to described presetting
Current threshold when, determine that the driving circuit (4) is abnormal.
4. compressor control method according to claim 3, which is characterized in that the compressor control method further includes：
The driving circuit is determined when first electric current and second electric current are all larger than the presetting current threshold
(4) normal.
5. compressor control method described in any one of -4 according to claim 1, which is characterized in that the compressor control
Method further includes：
When the driving circuit (4) exception, alarm command is generated.
6. a kind of compressor control device, which is characterized in that be applied to an air conditioner (1), the air conditioner (1) includes controller
(2), driving circuit (4) and compressor (5), the controller (2), the driving circuit (4) and the compressor (5) according to
Secondary electrical connection electrical connection, the driving circuit (4) includes power supply (41), the first inductance and the second inductance, the power supply (41)
It is electrically connected with first inductance and second inductance, first inductance and second inductance in parallel, the pressure
Contracting machine control device includes：
Parameter acquiring unit (8), for obtaining source current, the first electric current for flowing through first inductance, flowing through described second
Second electric current of inductance, the input current and input voltage for being input to the compressor (5)；
Judging unit (9), for judging the driving electricity based on the source current, first electric current and second electric current
Whether road (4) is abnormal；
Practical frequency reducing protection value determination unit (10) is used for when the driving circuit (4) exception, according to presetting normal drop
Frequency protection value and the first presetting proportionality coefficient determine practical frequency reducing protection value；
Computing unit (11), for calculating the operation function of the compressor (5) according to the input current and the input voltage
Rate；
Running frequency adjustment unit (12), for reducing the compressor (5) running frequency until the operation power be less than
Or it is equal to the practical frequency reducing protection value.
7. compressor control device according to claim 6, which is characterized in that the practical frequency reducing protection value determination unit
(10) for when the driving circuit (4) is abnormal, by the presetting normal frequency reducing protection value and described presetting the
The product of one proportionality coefficient is determined as the practical frequency reducing protection value, wherein 0<k<1, wherein k is the first presetting ratio
Coefficient.
8. compressor control device according to claim 6, which is characterized in that the judging unit (9) is used for when described
When source current is greater than presetting protective current threshold value, judge whether first electric current or second electric current are greater than or wait
In presetting current threshold；
The judging unit (9) is also used to be less than or equal to the presetting electricity when first electric current or second electric current
When flowing threshold value, determine that the driving circuit (4) is abnormal.
9. compressor control device according to claim 8, which is characterized in that the judging unit (9) is also used to work as institute
It states the first electric current and when second electric current is all larger than the presetting current threshold determines that the driving circuit (4) is normal.
10. the compressor control device according to any one of claim 6-9, which is characterized in that the compressor control
Device processed further includes：
Instruction generation unit, for generating alarm command when the driving circuit (4) exception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112688550A (en) * | 2020-11-20 | 2021-04-20 | 青岛海尔空调电子有限公司 | Method, system and device for judging failure of interleaved PFC circuit |
| CN112688551A (en) * | 2020-12-02 | 2021-04-20 | 青岛海尔空调电子有限公司 | Interleaved PFC circuit failure control method, system and device |
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