CN104047843B - Frequency conversion and single twin-tub changing method of positive displacement compressor - Google Patents
Frequency conversion and single twin-tub changing method of positive displacement compressor Download PDFInfo
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- CN104047843B CN104047843B CN201410228442.1A CN201410228442A CN104047843B CN 104047843 B CN104047843 B CN 104047843B CN 201410228442 A CN201410228442 A CN 201410228442A CN 104047843 B CN104047843 B CN 104047843B
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Abstract
The invention provides single twin-tub changing method of a kind of frequency conversion and positive displacement compressor.This frequency conversion includes with single twin-tub changing method of positive displacement compressor: step S1: determine compressor operating frequency range when twin-tub cut by single cylinder；Step S2: determine compressor operating frequency range during twin-tub singulation cylinder；Step S3: detect current compressor behavior and running frequency, and when the running status of the described compressor detected and running frequency reach to cut cylinder condition, perform rapidly single cylinder and cut twin-tub action or twin-tub singulation cylinder action.Frequency conversion according to the present invention and single twin-tub changing method of positive displacement compressor, it is possible to the single twin-tub realizing compressor is switched fast, and can ensure that the reliability of single twin-tub switching.
Description
Technical field
The present invention relates to air-conditioner field, in particular to a kind of frequency conversion and positive displacement compressor
Single twin-tub changing method.
Background technology
For there being a kind of air conditioner on market, use and there is frequency conversion and the compressor of transfiguration function,
Compressor lower cylinder selectivity is made by the open and close of reversing solenoid valve and the effect of check valve
UNICOM high-pressure side or low-pressure side.Lower cylinder idle running when lower cylinder UNICOM is on high-tension side time, now
This compressor only has upper cylinder to be compressed machine acting, and compressor is in single cylinder running status；When
The when of lower cylinder UNICOM low-pressure side, lower cylinder can be compressed acting, and now compressor is in double
Cylinder running status.
Single twin-tub changing method of prior art has two kinds:
1, no matter compressor current operation frequency is how many, immediately cuts cylinder after reaching to cut cylinder condition, this
Kind of changing method compressor frequency too high or too low when cut cylinder and easily cause driving and protect
Protect, reliability it cannot be guaranteed that.
2, after compressor reaches to cut cylinder condition, the running frequency to compressor is carried out at certain lifting frequency
Reason, then carry out transition switching, thus making to cut cylinder process needs certain transit time, no
Can realize moment cylinder cut by needs when cuts cylinder.
Summary of the invention
It is desirable to provide a kind of frequency conversion and single twin-tub changing method of positive displacement compressor, it is possible to
The single twin-tub realizing compressor is switched fast, and can ensure that the reliability of single twin-tub switching.
To achieve these goals, according to an aspect of the invention, it is provided a kind of frequency conversion with
Single twin-tub changing method of positive displacement compressor, including step S1: determine when twin-tub cut by single cylinder
Compressor operating frequency range；Step S2: determine compressor operating frequency during twin-tub singulation cylinder
Scope；Step S3: detect current compressor behavior and running frequency, and detecting
The running status of compressor and running frequency when reaching to cut cylinder condition, perform rapidly single cylinder and cut double
Cylinder action or twin-tub singulation cylinder action.
As preferably, step S1 includes: when compressor single cylinder runs, if the catalogue of compressor
Mark frequency f > A, and the running frequency A f of compressorA< during B, reach to cut twin-tub condition, remaining
Time keep single cylinder run, wherein A is the lower limit frequency value that twin-tub cut by single cylinder, fAFor compressor
Current operating frequency, f is the general objective frequency of compressor, and B is the upper limiting frequency that twin-tub cut by single cylinder
Value.
As preferably, step S2 includes: when compressor twin-tub runs, if the catalogue of compressor
Mark frequency f < C, and during running frequency fA of compressor≤D, reach singulation cylinder condition, remaining time
Wait and keep twin-tub to run, wherein fAFor the current operating frequency of compressor, f is the general objective of compressor
Frequency, C is single twin-tub operational energy efficiency turning point frequency, and D is the upper limit frequency value of twin-tub singulation cylinder.
As preferably, the general objective frequency of compressor is according to the air-conditioner self at compressor place
Operating load determines in real time.
As preferably, step S3 includes: when compressor single cylinder runs, if during f > A and fA >=B,
FA carries out raising frequency or frequency reducing with f/ λ for target；Remaining situation fA with λ f for target carry out raising frequency or
Person's frequency reducing, wherein A is the lower limit frequency value that twin-tub cut by single cylinder, fAThe frequency that currently operates for compressor
Rate, f is the general objective frequency of compressor, and B is the upper limit frequency value that twin-tub cut by single cylinder, and λ is pressure
Contracting machine volume coefficient of association.
As preferably, step S3 includes: when compressor twin-tub runs, fA is carried out with f for target
Raising frequency or frequency reducing, wherein fAFor the current operating frequency of compressor, f is the general objective of compressor
Frequency.
As preferably, λ is determined by λ=(V1+V2)/V2, and wherein V1 is compressor constant volume
The volume of cylinder, V2 is the volume of compressor variable volume cylinder.
As preferably, A < λ C, wherein C is single twin-tub operational energy efficiency turning point frequency.
Application technical scheme, frequency conversion and single twin-tub changing method bag of positive displacement compressor
Include: step S1: determine compressor operating frequency range when twin-tub cut by single cylinder；Step S2: really
Determine compressor operating frequency range during twin-tub singulation cylinder；Step S3: detect current compressor
Running status and running frequency, and reach in running status and the running frequency of the compressor detected
To when cutting cylinder condition, perform rapidly single cylinder and cut twin-tub action or twin-tub singulation cylinder action.Due to this
It is to be used as single twin-tub switching with frequency to sentence that the frequency conversion of application and single twin-tub of positive displacement compressor switch
Fixed condition, therefore can directly carry out single twin-tub switching in the case of frequency reaches requirement,
It can be avoided that cut the driving protection that cylinder is caused when compressor frequency is too high or too low, it is ensured that compression
The reliability of cylinder cut by machine, and can be without carrying out transition switching after frequency reducing, it is possible to achieve
Moment cuts cylinder, improves and cuts cylinder efficiency.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, this
The schematic description and description of invention is used for explaining the present invention, is not intended that the present invention's
Improper restriction.In the accompanying drawings:
Fig. 1 shows that single twin-tub of frequency conversion according to an embodiment of the invention and positive displacement compressor is cut
Change the flow chart of method.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.Need explanation
It is that, in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Combination mutually.
Fig. 1 is the frequency conversion stream with single twin-tub changing method of positive displacement compressor of the embodiment of the present invention
Cheng Tu.As it is shown in figure 1, the frequency conversion of the present embodiment and single twin-tub changing method bag of positive displacement compressor
Include: step S1: determine compressor operating frequency range when twin-tub cut by single cylinder；Step S2: really
Determine compressor operating frequency range during twin-tub singulation cylinder；Step S3: detect current compressor
Running status and running frequency, and reach in running status and the running frequency of the compressor detected
To when cutting cylinder condition, perform rapidly single cylinder and cut twin-tub action or twin-tub singulation cylinder action.
When carrying out single twin-tub switching, the application frequency conversion with single twin-tub switching of positive displacement compressor is
It is used as single twin-tub with frequency and is switched and determined condition, therefore can reach the feelings of requirement in frequency
Single twin-tub switching is directly carried out, it is possible to when avoiding compressor frequency too high or too low, cut cylinder institute under condition
The driving protection caused, it is ensured that the reliability of cylinder cut by compressor, and owing to the application is with frequency
It is used as the condition of single twin-tub switching, can reach just to carry out when single twin-tub switching requires in frequency
Switching, therefore without carrying out transition switching after to compressor frequency reducing, it is possible to achieve moment cuts
Cylinder, improves and cuts cylinder efficiency.
The switching condition of twin-tub cut by single cylinder: when compressor single cylinder runs, if compressor is total
Target frequency f > A, and the running frequency A f of compressorA< during B, reach to cut twin-tub condition, its
Keeping single cylinder to run time remaining, wherein A is the lower limit frequency value that twin-tub cut by single cylinder, fAFor compressor
Current operating frequency, f is the general objective frequency of compressor, B be single cylinder cut twin-tub the upper limit frequency
Rate value.When compressor single cylinder runs, if running frequency meets compression during change
General objective frequency f of machine > A, and the running frequency A f of compressorA< B, then compressor enters single
Twin-tub state cut by cylinder, and completes the single cylinder switching to twin-tub.The most above-mentioned A, B is according to sky
Adjusting the compressor operating frequency values that the working condition of device sets, different air-conditioners can be arranged not
With value, can be fixing numerical value can also be fixing algorithm.
The switching condition of twin-tub singulation cylinder is: when compressor twin-tub runs, if compressor is total
Target frequency f < C, and during running frequency fA of compressor≤D, reach singulation cylinder condition, remaining
Time keep twin-tub run, wherein fAFor the current operating frequency of compressor, f is the catalogue of compressor
Mark frequency, C is single twin-tub operational energy efficiency turning point frequency, and D is the upper limiting frequency of twin-tub singulation cylinder
Value.Wherein C, D are according to compressor operating frequency values determined by the operation conditions of air-conditioner,
Different air-conditioners can arrange different value, can be fixing numerical value can also be fixing calculation
Method.
In above-mentioned changing method, general objective frequency f of compressor is according to the sky at compressor place
The operating load adjusting device self determines in real time, and its value is real-time change with air-conditioner load variations,
General objective frequency f of different transducer air conditionings also can change.
Before compressor carries out single twin-tub switching action, when compressor single cylinder runs, if f > A
And during fA >=B, fA carries out raising frequency or frequency reducing with f/ λ for target；Remaining situation fA is with λ f as mesh
Mark carries out raising frequency or frequency reducing, and wherein A is the lower limit frequency value that twin-tub cut by single cylinder, fAFor compressor
Current operating frequency, f is the general objective frequency of compressor, B be single cylinder cut twin-tub the upper limit frequency
Rate value, λ is compressor volume coefficient of association.When compressor twin-tub runs, fA is with f as target
Carry out raising frequency or frequency reducing, wherein fAFor the current operating frequency of compressor, f is the total of compressor
Target frequency.
Above-mentioned parameter lambda and the volume V1 of compressor constant volume cylinder (the not cylinder of idle running)
Relevant with the volume V2 of compressor variable volume cylinder (idle running cylinder), λ in the present embodiment
Being determined by formula λ=(V1+V2)/V2, wherein V1 is the volume of compressor constant volume cylinder,
V2 is the volume of compressor variable volume cylinder.The value of λ be to ensure that compressor single cylinder and
Twin-tub runs and is referred to same general objective frequency f, and therefore the value of λ can also be public by other
Formula determines, it is only necessary to meet compressor single cylinder and twin-tub runs and is referred to same general objective
Frequency f.
A and C is typically based on the working condition of air-conditioner and determines, A is typically smaller than λ C, tool
Whether the little how many different units of body may be different, can go out during unit allocation to be seen
The most frequently cutting the situation of cylinder, the difference of A and C is interval for cutting cylinder transition, this interval be possible to prevent because of
Cause frequently cut cylinder for load minor fluctuations.
C value takes generally according to single twin-tub operational energy efficiency turning point, such as, under name cooling condition, open
Certain load indoor set refrigerating operaton, test under C1 frequency when compressor twin-tub one group of ability,
Efficiency, then the when of operation with single cylinder, adjustment compressor frequency makes under this single cylinder X1 frequency to X1
Under ability and twin-tub C1 frequency, ability is of substantially equal, it is thus achieved that one pair of frequency C1 and X1, from compression
Machine twin-tub runs low-limit frequency to start upwards to test N class frequency pair, when twin-tub frequency C and single cylinder frequency
Rate X ability efficiency takes C value for single twin-tub efficiency turning point when of the most of substantially equal.
The value of D is that the reliability according to compressor twin-tub singulation cylinder determines, general D is more than C,
Different units may be different.The setting of D value can limit the when that cylinder being cut by compressor and run frequency
Rate is not over D value, it is ensured that the reliability of system.
By above-mentioned single twin-tub switching mode, can reach to ensure unit need to cut cylinder time
Time can the most reliably cut the purpose of cylinder.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention,
For a person skilled in the art, the present invention can have various modifications and variations.All at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. made, all should
Within being included in protection scope of the present invention.
Claims (6)
1. a frequency conversion and single twin-tub changing method of positive displacement compressor, it is characterised in that including:
Step S1: determine compressor operating frequency range when twin-tub cut by single cylinder, wherein, work as institute
When stating the operation of compressor single cylinder, if general objective frequency f of described compressor > A, and described compressor
Running frequency A fA< during B, reach to cut twin-tub condition, remaining time keep single cylinder run, its
Middle A is the lower limit frequency value that twin-tub cut by single cylinder, fAFor the current operating frequency of compressor, f is compression
The general objective frequency of machine, B is the upper limit frequency value that twin-tub cut by single cylinder；
Step S2: determine compressor operating frequency range during twin-tub singulation cylinder；
Step S3: detect current compressor behavior and running frequency, and detecting
When the running status of described compressor and running frequency reach to cut cylinder condition, perform rapidly single cylinder and cut
Twin-tub action or twin-tub singulation cylinder action；When described compressor single cylinder runs, if f > A and fA≥
During B, fARaising frequency or frequency reducing is carried out for target with f/ λ；Remaining situation fACarry out with λ f for target
Raising frequency or frequency reducing, wherein A is the lower limit frequency value that twin-tub cut by single cylinder, fACurrent for compressor
Operating frequency, f is the general objective frequency of compressor, and B is the upper limit frequency value that twin-tub cut by single cylinder,
λ is compressor volume coefficient of association.
2. frequency conversion as claimed in claim 1 and single twin-tub changing method of positive displacement compressor, its
Being characterised by, described step S2 includes:
When described compressor twin-tub runs, if general objective frequency f of described compressor < C, and institute
State running frequency f of compressorADuring≤D, reach singulation cylinder condition, remaining time keep twin-tub fortune
OK, wherein fAFor the current operating frequency of compressor, f is the general objective frequency of compressor, and C is Dan Shuan
Cylinder operational energy efficiency turning point frequency, D is the upper limit frequency value of twin-tub singulation cylinder.
3. frequency conversion as claimed in claim 1 or 2 and single twin-tub changing method of positive displacement compressor,
It is characterized in that, the general objective frequency of described compressor is according to the air-conditioner at described compressor place
The operating load of self determines in real time.
4. frequency conversion as claimed in claim 1 and single twin-tub changing method of positive displacement compressor, its
Being characterised by, described step S3 also includes:
When described compressor twin-tub runs, fARaising frequency or frequency reducing is carried out for target, wherein with f
fAFor the current operating frequency of compressor, f is the general objective frequency of compressor.
5. frequency conversion as claimed in claim 1 and single twin-tub changing method of positive displacement compressor, its
Being characterised by, λ is determined by λ=(V1+V2)/V2, and wherein V1 is compressor constant volume cylinder
Volume, V2 is the volume of compressor variable volume cylinder.
6. frequency conversion as claimed in claim 5 and single twin-tub changing method of positive displacement compressor, its
Being characterised by, A < λ C, wherein C is single twin-tub operational energy efficiency turning point frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410228442.1A CN104047843B (en) | 2014-05-27 | 2014-05-27 | Frequency conversion and single twin-tub changing method of positive displacement compressor |
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| CN201410228442.1A CN104047843B (en) | 2014-05-27 | 2014-05-27 | Frequency conversion and single twin-tub changing method of positive displacement compressor |
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| CN104047843B true CN104047843B (en) | 2016-10-26 |
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