CN107332492A - Compressor protection method, device and computer readable storage medium - Google Patents
Compressor protection method, device and computer readable storage medium Download PDFInfo
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- CN107332492A CN107332492A CN201710565473.XA CN201710565473A CN107332492A CN 107332492 A CN107332492 A CN 107332492A CN 201710565473 A CN201710565473 A CN 201710565473A CN 107332492 A CN107332492 A CN 107332492A
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- unbalancedness
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003860 storage Methods 0.000 title claims abstract description 10
- 230000006641 stabilisation Effects 0.000 claims description 39
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- 238000004590 computer program Methods 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 2
- 230000002045 lasting effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 3
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- 230000006835 compression Effects 0.000 description 5
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- 108010001267 Protein Subunits Proteins 0.000 description 3
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a method and a device for protecting a compressor and a computer readable storage medium, wherein the method comprises the steps of acquiring a three-phase current of the compressor, which is acquired by a sampling circuit; calculating the unbalance degree corresponding to the three-phase current of the compressor according to the three-phase current; judging a threshold value interval in which the unbalance degree is positioned, wherein the threshold value comprises a first threshold value, a second threshold value and a third threshold value; obtaining the abnormal grade of the unbalance degree according to the threshold interval of the unbalance degree; according to different abnormal levels of the unbalance degree, different protection measures are taken for the compressor, so that the compressor can be effectively protected, the running noise of the compressor is reduced, and meanwhile, the damage of the compressor is avoided.
Description
Technical field
The present invention relates to compressor protection technical field, and in particular to a kind of compressor protection method, device and computer
Readable storage medium storing program for executing.
Background technology
At present, compressor current is typically sampled by bridge arm series resistance under switching tube, the pressure obtained according to sampling
The electromechanical stream of contracting combines compressor body parameter and obtains the accurate rotor-position signal of compressor by position estimation algorithm, wherein pressing
The sampling of contracting machine stator electric current is most important, and the precision and real-time of current sample determine the accuracy of compressor drum position
And dynamic, the static properties of system.
Compressor in the process of running, if certain phase current sampling circuit is abnormal, can cause the phase current collected big
It is small to occur exception, in turn result in compressor three-phase current unbalance.Compressor three-phase current unbalance, can cause compressor operating
Noise is significantly increased, especially when compressor current than it is larger when, noise can clearly, and compressor for a long time with three-phase not
High current operation is balanced, compressor winding is may result in and burns out.
The content of the invention
Access compensation device is generally used in the prior art with the electric current of compensating three-phase unbalance so that each phase current is equal
Weighing apparatus, reaches the purpose of compressor protection.Inventors herein have recognized that, when the degree of unbalancedness of compressor is in different grades,
Its extent of injury to compressor is different, it is necessary to take different safeguard measures, and degree of unbalancedness is not carried out in the prior art
Grade judges, also takes compressor different safeguard measures not according to the different grade of degree of unbalancedness.
It is an object of the invention to provide a kind of compressor protection method, device and computer-readable recording medium, pass through meter
The degree of unbalancedness of the three-phase current of the compressor is calculated, and safeguard measure is taken to the compressor according to the degree of unbalancedness.
To solve above technical problem, the embodiment of the present invention provides a kind of compressor protection method, and methods described is specifically wrapped
Include：
The three-phase current of collect and process machine；
According to the three-phase current, the degree of unbalancedness of the three-phase current is calculated；
Judge the threshold interval where the degree of unbalancedness；
When the degree of unbalancedness exceedes first threshold, the compressor is controlled to perform shutdown operation；
When the degree of unbalancedness is between Second Threshold and the first threshold, the compressor is controlled to perform frequency reducing behaviour
Make；
When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, the operation shape of the compressor is judged
State；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If the compressor is in drop
Frequency state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, the compressor is controlled
Keep the frequency stabilization state；
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.
Preferably, it is described according to the three-phase current, the degree of unbalancedness of the three-phase current is calculated, is specifically included：
According to the three-phase current, the corresponding three-phase current virtual value of the three-phase current is calculated；
Calculate the maximum and minimum value in the corresponding three-phase current virtual value of the three-phase current；
Calculate the average value of the corresponding three-phase current virtual value of the three-phase current；
According to the maximum, the minimum value and the average value, the degree of unbalancedness is calculated.
Preferably, it is described according to the maximum, the minimum value and the average value, the degree of unbalancedness is calculated,
Specifically include：
According to IU=(IMax-IMin)/IAvgThe degree of unbalancedness is calculated,
Wherein, Iu is the degree of unbalancedness, IMaxFor the maximum in the three-phase current virtual value, IMinFor the three-phase
Minimum value in current effective value, IAvgFor the average value of the three-phase current virtual value.
Preferably, it is described when the degree of unbalancedness exceedes first threshold, control the compressor to perform shutdown operation, tool
Body includes：
When the degree of unbalancedness exceedes the first threshold, judge that the degree of unbalancedness exceedes holding for the first threshold
Whether the continuous time is more than the first preset time；
When the duration that the degree of unbalancedness exceedes the first threshold exceeding first preset time, institute is controlled
State compressor and perform the shutdown operation.
Preferably, it is described when the degree of unbalancedness is between Second Threshold and the first threshold, control the compression
Machine performs frequency redution operation, specifically includes:
When the degree of unbalancedness is between the Second Threshold and the first threshold, judge the degree of unbalancedness in institute
The duration between Second Threshold and the first threshold is stated whether more than the second preset time；
Exceed described second when duration of the degree of unbalancedness between the Second Threshold and the first threshold
During preset time, the compressor is controlled to perform the frequency redution operation.
Preferably, it is described when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judge the compression
The running status of machine；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If the pressure
Contracting machine is in frequency reducing state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, control
The compressor keeps the frequency stabilization state, specifically includes：
When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judge the degree of unbalancedness in institute
The duration between the 3rd threshold value and the Second Threshold is stated whether more than the 3rd preset time；
Exceed the described 3rd when duration of the degree of unbalancedness between the 3rd threshold value and the Second Threshold
During preset time, the running status of the compressor is judged；
If the compressor is in raising frequency state, the compressor is controlled to perform the stopping raising frequency operation；
If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；
If the compressor is in frequency stabilization state, the compressor is controlled to keep the frequency stabilization state.
The embodiment of the present invention also provides a kind of compressor protection device, including：
Current acquisition unit, the three-phase current for gathering the compressor；
Computing unit, for according to the three-phase current, calculating the degree of unbalancedness of the three-phase current；
Judging unit, for judging the threshold interval where the degree of unbalancedness；
First control unit, for when the degree of unbalancedness exceedes first threshold, controlling the compressor to perform shutdown
Operation；
Second control unit, for when the degree of unbalancedness is between Second Threshold and the first threshold, controlling institute
State compressor and perform frequency redution operation；
3rd control unit, for when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judging institute
State the running status of compressor；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If
The compressor is in frequency reducing state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization shape
State, controls the compressor to keep the frequency stabilization state；
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.
Preferably, the computing unit includes：
Current effective value computing unit, for according to the three-phase current, calculating the corresponding three-phase electricity of the three-phase current
Flow virtual value；
Most it is worth computing unit, for calculating maximum and minimum in the corresponding three-phase current virtual value of the three-phase current
Value；
Average calculation unit, the average value for calculating the corresponding three-phase current virtual value of the three-phase current；
Degree of unbalancedness computing unit, for according to the maximum, the minimum value and the average value, calculating described
Degree of unbalancedness.
The embodiment of the present invention also provides a kind of compressor protection device, including processor, memory and is stored in described
In memory and it is configured as by the computer program of the computing device, described in the computing device during computer program
Realize above-mentioned compressor protection method.
The embodiment of the present invention also provides a kind of computer-readable recording medium, and the computer-readable recording medium includes depositing
The computer program of storage, wherein, equipment where controlling the computer-readable recording medium when the computer program is run
Perform above-mentioned compressor protection method.
Compared to prior art, a kind of beneficial effect of compressor protection method and device provided in an embodiment of the present invention exists
In：Methods described calculates the degree of unbalancedness of the three-phase current, and judge described by gathering the three-phase current of the compressor
Threshold interval where degree of unbalancedness, so that judge the exception level of the degree of unbalancedness, and according to the different of the degree of unbalancedness
Normal grade, takes the compressor different safeguard measures, specific as follows：When the degree of unbalancedness exceedes the first threshold
When, control the compressor to perform shutdown operation；When the degree of unbalancedness is between the Second Threshold and the first threshold
When, control the compressor to perform frequency redution operation；When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold
When, judge the running status of the compressor；If the compressor is in raising frequency state, controls the compressor to perform and stop rising
Frequency is operated；If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；If at the compressor
In frequency stabilization state, the compressor is controlled to keep the frequency stabilization state；By above-mentioned compressor guard method, can effectively it protect
The compressor is protected, to reach reduction compressor operating noise, while avoiding the purpose of compressor damage.Meanwhile, the present invention is also
A kind of compressor protection device and computer-readable recording medium for performing the above method is provided.
Brief description of the drawings
Fig. 1 is a kind of flow chart of compressor protection method provided in an embodiment of the present invention；
Fig. 2 is a kind of block diagram of compressor protection device provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, a kind of its compressor protection method flow chart that to be one embodiment of the invention provided, specific bag
Include：
S10, collect and process machine three-phase current, wherein, the three-phase current, the compressor are gathered by sample circuit
Three-phase current be respectively U phase currents iu, V phase currents iv, W phase currents iw。
S20, according to the three-phase current, calculate the degree of unbalancedness of the three-phase current.
S30, judge threshold interval where the degree of unbalancedness.
S40, when the degree of unbalancedness exceedes first threshold, control the compressor to perform shutdown operation.
S50, when the degree of unbalancedness is between Second Threshold and the first threshold, control the compressor to perform drop
Frequency is operated.
S60, when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judge the operation of the compressor
State；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If the compressor is in
Frequency reducing state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, the compression is controlled
Machine keeps the frequency stabilization state.
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.In one kind
In optional embodiment, the first threshold is set to 0.2, and the Second Threshold is set to 0.15, and the 3rd threshold value is set
It is set to 0.1.
In the present embodiment, when the degree of unbalancedness is equal to the first threshold, the compressor is controlled to perform described
Shutdown operation.When the degree of unbalancedness is equal to Second Threshold, the compressor is controlled to perform frequency redution operation.When the imbalance
When degree is equal to three threshold values, the running status of the compressor is determined whether；If the compressor is in raising frequency state, control
The compressor, which is performed, stops raising frequency operation；If the compressor is in frequency reducing state, the compressor is controlled to keep the drop
Frequency state；If the compressor is in frequency stabilization state, the compressor is controlled to keep the frequency stabilization state.
In an optional embodiment, when the degree of unbalancedness is equal to the first threshold, the compressor is controlled
Perform the frequency redution operation.When the degree of unbalancedness is equal to Second Threshold, the running status of the compressor is determined whether；
If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If the compressor is in frequency reducing
State, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, the compressor is controlled to protect
Hold the frequency stabilization state.When the degree of unbalancedness is equal to three threshold values, the compressor is normally run.
Wherein, what the step-length that the raising frequency state of the compressor refers to the compressor actual motion frequency to set rose
Stage, subsequent time running frequency=currently practical running frequency+raising frequency step-length；The frequency reducing state of the compressor refers to described
Compressor actual motion frequency is with the step-length that sets in the stage of decline, subsequent time running frequency=currently practical operation frequency
Rate-frequency reducing step-length；The frequency stabilization state of the compressor refers to that the compressor is run with fixed frequency, and raising frequency does not drop yet
Frequently, subsequent time running frequency=currently practical running frequency.
Step S20 is according to the three-phase current, and the degree of unbalancedness for calculating the three-phase current is specifically included：
According to the three-phase current, the corresponding three-phase current virtual value of the three-phase current is calculated, that is, calculates and obtains institute
State U phase currents iuCorresponding current effective value Iu, the V phase currents ivCorresponding current effective value Iv, the W phase currents iwCorrespondence
Current effective value Iw。
The maximum and minimum value in the corresponding three-phase current virtual value of the three-phase current are calculated, wherein, the maximum
Value Imax=Max (Iu,Iv,Iw), the minimum value Imin=min (Iu,Iv,Iw)。
The average value of the corresponding three-phase current virtual value of the three-phase current is calculated, wherein the average value IAvg=(Iu+Iv
+Iw)/3。
According to the maximum Imax, the minimum value IminAnd the average value IAvg, calculate the degree of unbalancedness.
Wherein, according to formula (1), the degree of unbalancedness is calculated,
IU=(IMax-IMin)/IAvg (1)。
In an optional embodiment, step S40 controls the compression when the degree of unbalancedness exceedes first threshold
Machine performs shutdown operation, specifically includes：
When the degree of unbalancedness exceedes the first threshold, judge that the degree of unbalancedness exceedes holding for the first threshold
Whether the continuous time is more than the first preset time；
When the degree of unbalancedness exceedes the duration of the first threshold more than the first preset time, the pressure is controlled
Contracting machine performs the shutdown operation.
In an optional embodiment, step S50 when the degree of unbalancedness Second Threshold and the first threshold it
Between when, control the compressor to perform frequency redution operation, specifically include:
When the degree of unbalancedness is between the Second Threshold and the first threshold, judge the degree of unbalancedness in institute
The duration between Second Threshold and the first threshold is stated whether more than the second preset time；
Exceed described second when duration of the degree of unbalancedness between the Second Threshold and the first threshold
During preset time, the compressor is controlled to perform the frequency redution operation, so that the degree of unbalancedness is less than the 3rd threshold value.
In an optional embodiment, step S60 when the degree of unbalancedness the 3rd threshold value and the Second Threshold it
Between when, judge the running status of the compressor；If the compressor is in raising frequency state, the compressor is controlled to perform stopping
Raising frequency is operated；If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；If the compressor
In frequency stabilization state, control the compressor to keep the frequency stabilization state, specifically include：
When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judge that the degree of unbalancedness is less than
The Second Threshold and more than the 3rd threshold value duration whether exceed the 3rd preset time；
When the degree of unbalancedness is less than the Second Threshold and duration more than the 3rd threshold value exceedes described the
During three preset times, the running status of the compressor is judged；
If the compressor is in raising frequency state, the compressor is controlled to perform the stopping raising frequency operation；
If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；
If the compressor is in frequency stabilization state, the compressor is controlled to keep the frequency stabilization state.
Wherein, first preset time, second preset time, the 3rd preset time are set to 60s extremely
Any value between 120s.
Further, when the degree of unbalancedness exceedes three threshold value, the compressor is judged as needing to carry out
The situation of protection, wherein, when the degree of unbalancedness exceedes the first threshold, and the duration exceed described first it is default when
Between, severely subnormal grade is judged as, the compressor needs to carry out stoppage protection；When the degree of unbalancedness is in first threshold
When between value and the Second Threshold, and the duration exceedes second preset time, is judged as moderate exception level, institute
Stating compressor is needed to carry out frequency redution operation, and the electric current of the compressor is reduced with this, so as to reduce degree of unbalancedness, and then ensures institute
Compressor is stated can normally to run in less degree of unbalancedness；When the degree of unbalancedness is in the Second Threshold and the described 3rd
When between threshold value, and the duration exceedes the 3rd preset time, mile abnormality grade is judged as, at this time, it may be necessary to enter one
Walk and the running status of the compressor judged, if the compressor is in raising frequency state, the compressor need into
Row stops raising frequency operation, if the compressor is in frequency reducing state or frequency stabilization state, and the compressor keeps the frequency reducing shape
State or the frequency stabilization state；When the degree of unbalancedness is less than three threshold value, the compressor is judged as entering
The situation of row protection, the compressor is normally run.
Referring to Fig. 2, being that the embodiment of the present invention also provides a kind of block diagram of compressor protection device, the compressor protection
Device includes：
Current acquisition unit 1, the three-phase current for gathering the compressor；
Computing unit 2, for according to the three-phase current, calculating the degree of unbalancedness of the three-phase current；
Judging unit 3, for judging the threshold interval where the degree of unbalancedness；
First control unit 4, for when the degree of unbalancedness exceedes first threshold, controlling the compressor to perform shutdown
Operation；
Second control unit 5, for when the degree of unbalancedness is between Second Threshold and the first threshold, controlling institute
State compressor and perform frequency redution operation；
3rd control unit 6, for when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judging institute
State the running status of compressor；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If
The compressor is in frequency reducing state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization shape
State, controls the compressor to keep the frequency stabilization state；
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.
The computing unit 2 is specifically included：
Current effective value computing unit, for according to the three-phase current, calculating the corresponding three-phase electricity of the three-phase current
Flow virtual value；
Most it is worth computing unit, for calculating maximum and minimum in the corresponding three-phase current virtual value of the three-phase current
Value；
Average calculation unit, the average value for calculating the corresponding three-phase current virtual value of the three-phase current；
Degree of unbalancedness computing unit, for according to the maximum, the minimum value and the average value, calculating described
Degree of unbalancedness.
In an optional embodiment, the compressor protection device also includes：
First judgment sub-unit, for when the degree of unbalancedness exceedes the first threshold, judging the degree of unbalancedness
More than the first threshold duration whether more than the first preset time；
When the duration that the degree of unbalancedness exceedes the first threshold exceeding first preset time, the first control
Unit 4 processed controls the compressor to perform the shutdown operation.
In an optional embodiment, the compressor protection device also includes：
Second judgment sub-unit, for when the degree of unbalancedness is between the Second Threshold and the first threshold,
When judging whether duration of the degree of unbalancedness between the Second Threshold and the first threshold be default more than second
Between；
Exceed described second when duration of the degree of unbalancedness between the Second Threshold and the first threshold
During preset time, the second control unit 5 controls the compressor to perform the frequency redution operation.
In an optional embodiment, the compressor protection device also includes：
3rd judgment sub-unit, for when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold,
When judging whether duration of the degree of unbalancedness between the 3rd threshold value and the Second Threshold be default more than the 3rd
Between；
Exceed the described 3rd when duration of the degree of unbalancedness between the 3rd threshold value and the Second Threshold
During preset time, the running status of the compressor is judged；
If the compressor is in raising frequency state, the 3rd control unit 6 controls the compressor to perform the stopping raising frequency
Operation；
If the compressor is in frequency reducing state, the 3rd control unit 6 controls the compressor to keep the frequency reducing state；
If the compressor is in frequency stabilization state, the 3rd control unit 6 controls the compressor to keep the frequency stabilization state.
The embodiment of the present invention also provides a kind of compressor protection device, including processor, memory and is stored in described
In memory and it is configured as by the computer program of the computing device, such as compressor protection program.The processor
The step in above-mentioned compressor protection method embodiment, such as step shown in Fig. 1 are realized when performing the computer program.
Or, the function of each module/unit in above-mentioned each device embodiment is realized described in the computing device during computer program.
Exemplary, the computer program can be divided into one or more module/units, one or many
Individual module/unit is stored in the memory, and by the computing device, to complete the present invention.It is one or many
Individual module/unit can complete the series of computation machine programmed instruction section of specific function, and the instruction segment is used to describe institute
State implementation procedure of the computer program in the compressor protection device/terminal device.For example, the computer program can be with
It is divided into current acquisition unit, computing unit, judging unit, the first control unit, the second control unit, the 3rd control unit
Deng each module concrete function is as follows：Electric current acquiring unit, the three-phase current for gathering the compressor；Computing unit, is used for
According to the three-phase current, the degree of unbalancedness of the three-phase current is calculated；Judging unit, for judging the degree of unbalancedness place
Threshold interval；First control unit, for when the degree of unbalancedness exceedes first threshold, controlling the compressor to perform and stopping
Machine is operated；Second control unit, for when when the degree of unbalancedness is between Second Threshold and the first threshold, controlling institute
State compressor and perform frequency redution operation；3rd control unit, for when the degree of unbalancedness is in the 3rd threshold value and the Second Threshold
Between when, judge the running status of the compressor；If the compressor is in raising frequency state, controls the compressor to perform and stop
Only raising frequency is operated；If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；If the compression
When machine is in frequency stabilization state, the compressor is controlled to keep the frequency stabilization state.
Compressor protection device/the terminal device can be desktop PC, notebook, palm PC and high in the clouds clothes
The computing devices such as business device.Compressor protection device/the terminal device may include, but be not limited only to, processor, memory.This
Art personnel are appreciated that foregoing description does not constitute the restriction to compressor protection device/terminal device, can include
Parts more more or less than foregoing description, either combine some parts or different parts, such as described compressor protection
Device/terminal device can also include input-output equipment, network access equipment, bus etc..
Alleged processor can be CPU (Central Processing Unit, CPU), can also be it
His general processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) or other PLDs, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng the processor is the control centre of the compressor protection device/terminal device, whole using various interfaces and connection
The various pieces of individual compressor protection device/terminal device.
The memory can be used for storing the computer program and/or module, and the processor is by running or performing
The computer program and/or module being stored in the memory, and the data being stored in memory are called, realize described
The various functions of compressor protection device/terminal device.The memory can mainly include storing program area and storage data field,
Wherein, (such as electric current obtains function, meter to the application program that storing program area can be needed for storage program area, at least one function
Calculate function, arbitration functions etc.) etc.；Storage data field can be stored uses created data (such as the first threshold according to computer
Value, Second Threshold, the 3rd threshold value, preset time etc.) etc..In addition, memory can include high-speed random access memory, may be used also
With including nonvolatile memory, such as hard disk, internal memory, plug-in type hard disk, intelligent memory card (Smart Media Card,
SMC), secure digital (Secure Digital, SD) blocks, flash card (Flash Card), at least one disk memory, sudden strain of a muscle
Memory device or other volatile solid-state parts.
Wherein, if the integrated module/unit of the compressor protection device/terminal device is with the shape of SFU software functional unit
Formula is realized and as independent production marketing or in use, can be stored in a computer read/write memory medium.It is based on
Such to understand, the present invention realizes all or part of flow in above-described embodiment method, can also by computer program come
Related hardware is instructed to complete, described computer program can be stored in a computer-readable recording medium, the computer
Program is when being executed by processor, the step of each above-mentioned embodiment of the method can be achieved.Wherein, the computer program includes meter
Calculation machine program code, the computer program code can be source code form, object identification code form, executable file or some
Intermediate form etc..The computer-readable medium can include：Can carry the computer program code any entity or
Device, recording medium, USB flash disk, mobile hard disk, magnetic disc, CD, computer storage, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software
Distribution medium etc..It should be noted that the content that the computer-readable medium is included can make laws according in jurisdiction
Requirement with patent practice carries out appropriate increase and decrease, such as in some jurisdictions, according to legislation and patent practice, computer
Computer-readable recording medium does not include electric carrier signal and telecommunication signal.
Compared to prior art, a kind of compressor protection method provided in an embodiment of the present invention, device and computer can be deposited
The beneficial effect of storage media is：Methods described calculates the three-phase current by gathering the three-phase current of the compressor
Degree of unbalancedness, and judge the threshold interval where the degree of unbalancedness, so that judge the exception level of the degree of unbalancedness, and root
According to the exception level of the degree of unbalancedness, different safeguard measures are taken the compressor：When the degree of unbalancedness is more than
During one threshold value, the compressor is controlled to perform shutdown operation；When the degree of unbalancedness Second Threshold and the first threshold it
Between when, control the compressor to perform frequency redution operation；When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold,
Judge the running status of the compressor；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency
Operation；If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；If the compressor is in
During frequency stabilization state, the compressor is controlled to keep the frequency stabilization state；, can be effectively by the safeguard measure of above-mentioned compressor
The compressor is protected, to reach reduction compressor operating noise, while avoiding the purpose of compressor damage.Meanwhile, the present invention
A kind of compressor protection device and computer-readable recording medium for performing the above method is also provided.
Above is the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as this hair
Bright protection domain.
Claims (10)
1. a kind of compressor protection method, it is characterised in that including：
The three-phase current of collect and process machine；
According to the three-phase current, the degree of unbalancedness of the three-phase current is calculated；
Judge the threshold interval where the degree of unbalancedness；
When the degree of unbalancedness exceedes first threshold, the compressor is controlled to perform shutdown operation；
When the degree of unbalancedness is between Second Threshold and the first threshold, the compressor is controlled to perform frequency redution operation；
When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, the running status of the compressor is judged；If
The compressor is in raising frequency state, controls the compressor to perform and stops raising frequency operation；If the compressor is in frequency reducing shape
State, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, the compressor is controlled to keep
The frequency stabilization state；
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.
2. compressor protection method as claimed in claim 1, it is characterised in that described according to the three-phase current, calculates institute
The degree of unbalancedness of three-phase current is stated, is specifically included：
According to the three-phase current, the corresponding three-phase current virtual value of the three-phase current is calculated；
Calculate the maximum and minimum value in the corresponding three-phase current virtual value of the three-phase current；
Calculate the average value of the corresponding three-phase current virtual value of the three-phase current；
According to the maximum, the minimum value and the average value, the degree of unbalancedness is calculated.
3. compressor protection method as claimed in claim 2, it is characterised in that described according to the maximum, the minimum
Value and the average value, calculate the degree of unbalancedness, specifically include：
According to IU=(IMax-IMin)/IAvgThe degree of unbalancedness is calculated,
Wherein, Iu is the degree of unbalancedness, IMaxFor the maximum in the three-phase current virtual value, IMinFor the three-phase current
Minimum value in virtual value, IAvgFor the average value of the three-phase current virtual value.
4. compressor protection method as claimed in claim 1, it is characterised in that described when the degree of unbalancedness is more than the first threshold
During value, control the compressor to perform shutdown operation, specifically include：
When the degree of unbalancedness exceed the first threshold when, judge the degree of unbalancedness more than the first threshold it is lasting when
Between whether more than the first preset time；
When the duration that the degree of unbalancedness exceedes the first threshold exceeding first preset time, the pressure is controlled
Contracting machine performs the shutdown operation.
5. compressor protection method as claimed in claim 1, it is characterised in that described when the degree of unbalancedness is in Second Threshold
When between the first threshold, control the compressor to perform frequency redution operation, specifically include:
When the degree of unbalancedness is between the Second Threshold and the first threshold, judge the degree of unbalancedness described
Whether the duration between two threshold values and the first threshold is more than the second preset time；
Preset when duration of the degree of unbalancedness between the Second Threshold and the first threshold exceedes described second
During the time, the compressor is controlled to perform the frequency redution operation.
6. compressor protection method as claimed in claim 1, it is characterised in that described when the degree of unbalancedness is in the 3rd threshold value
When between the Second Threshold, the running status of the compressor is judged；If the compressor is in raising frequency state, institute is controlled
State compressor and perform and stop raising frequency operation；If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing
State；If the compressor is in frequency stabilization state, controls the compressor to keep the frequency stabilization state, specifically include：
When the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judge the degree of unbalancedness described
Whether the duration between three threshold values and the Second Threshold is more than the 3rd preset time；
Preset when duration of the degree of unbalancedness between the 3rd threshold value and the Second Threshold exceedes the described 3rd
During the time, the running status of the compressor is judged；
If the compressor is in raising frequency state, the compressor is controlled to perform the stopping raising frequency operation；
If the compressor is in frequency reducing state, the compressor is controlled to keep the frequency reducing state；
If the compressor is in frequency stabilization state, the compressor is controlled to keep the frequency stabilization state.
7. a kind of compressor protection device, it is characterised in that including：
Current acquisition unit, the three-phase current for gathering the compressor；
Computing unit, for according to the three-phase current, calculating the degree of unbalancedness of the three-phase current；
Judging unit, for judging the threshold interval where the degree of unbalancedness；
First control unit, for when the degree of unbalancedness exceedes first threshold, controlling the compressor to perform shutdown operation；
Second control unit, for when the degree of unbalancedness is between Second Threshold and the first threshold, controlling the pressure
Contracting machine performs frequency redution operation；
3rd control unit, for when the degree of unbalancedness is between the 3rd threshold value and the Second Threshold, judging the pressure
The running status of contracting machine；If the compressor is in raising frequency state, controls the compressor to perform and stop raising frequency operation；If described
Compressor is in frequency reducing state, controls the compressor to keep the frequency reducing state；If the compressor is in frequency stabilization state, control
Make the compressor and keep the frequency stabilization state；
Wherein, the first threshold is more than the Second Threshold, and the Second Threshold is more than the 3rd threshold value.
8. compressor protection device as claimed in claim 7, it is characterised in that the computing unit includes：
Current effective value computing unit, has for according to the three-phase current, calculating the corresponding three-phase current of the three-phase current
Valid value；
Most it is worth computing unit, for calculating maximum and minimum value in the corresponding three-phase current virtual value of the three-phase current；
Average calculation unit, the average value for calculating the corresponding three-phase current virtual value of the three-phase current；
Degree of unbalancedness computing unit, for according to the maximum, the minimum value and the average value, calculating the injustice
Weighing apparatus degree.
9. a kind of compressor protection device, it is characterised in that including processor, memory and be stored in the memory and
It is configured as by the computer program of the computing device, realizes such as right described in the computing device during computer program
It is required that the compressor protection method in 1 to 6 described in any one.
10. a kind of computer-readable recording medium, it is characterised in that the computer-readable recording medium includes the calculating of storage
Machine program, wherein, equipment where controlling the computer-readable recording medium when the computer program is run is performed as weighed
Profit requires the compressor protection method described in any one in 1 to 6.
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| CN108199628A (en) * | 2017-12-12 | 2018-06-22 | 青岛海尔空调器有限总公司 | The processing method and device of motor resonance noise |
| CN108489037A (en) * | 2018-03-28 | 2018-09-04 | 广东美的暖通设备有限公司 | Control method, system and the air conditioner of frequency-changeable compressor |
| CN108599473A (en) * | 2017-12-12 | 2018-09-28 | 青岛海尔空调器有限总公司 | The processing method and device of motor resonance noise |
| CN110578680A (en) * | 2019-09-29 | 2019-12-17 | 深圳市永祥测控技术有限公司 | Fault diagnosis method, system and computer readable storage medium for reciprocating compressor |
| CN110966729A (en) * | 2018-09-30 | 2020-04-07 | 广东美芝制冷设备有限公司 | Compressor wiring reverse connection identification method and device, compressor and air conditioner |
| CN113107825A (en) * | 2020-01-13 | 2021-07-13 | 安徽美芝制冷设备有限公司 | Control system, method and device of compressor, refrigeration equipment and storage medium |
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