CN104047843A - Single-cylinder operation and double-cylinder operation switching method for variable-frequency and variable-capacity compressors - Google Patents
Single-cylinder operation and double-cylinder operation switching method for variable-frequency and variable-capacity compressors Download PDFInfo
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- CN104047843A CN104047843A CN201410228442.1A CN201410228442A CN104047843A CN 104047843 A CN104047843 A CN 104047843A CN 201410228442 A CN201410228442 A CN 201410228442A CN 104047843 A CN104047843 A CN 104047843A
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Abstract
The invention provides a single-cylinder operation and double-cylinder operation switching method for variable-frequency and variable-capacity compressors. The single-cylinder operation and double-cylinder operation switching method for variable-frequency and variable-capacity compressors includes that step S1: the operating frequency range of a compressor is determined when single-cylinder operation needs to be switched to double-cylinder operation; step S2: the operating frequency range of the compressor is determined when double-cylinder operation needs to be switched to single-cylinder operation; step S3: the current operating state and operating frequency of the compressor are detected, and when the detected operating state and operating frequency of the compressor reach cylinder switching conditions, the action of switching single-cylinder operation to double-cylinder operation or switching double-cylinder operation to single-cylinder operation is quickly executed. According to the invention, the single-cylinder operation and double-cylinder operation switching method for variable-frequency and variable-capacity compressors can realize the quick single-cylinder operation and double-cylinder operation switching of the compressor, and can ensure the reliability of single-cylinder operation and double-cylinder operation switching.
Description
Technical field
The present invention relates to air conditioner field, in particular to single twin-tub switching method of a kind of frequency conversion and variable volume compressor.
Background technique
For there being a kind of air conditioner on market, use the compressor with frequency conversion and transfiguration function, make compressor lower cylinder selectivity UNICOM high pressure side or low voltage side by the open and close of reversing solenoid valve and the effect of one-way valve.Lower cylinder idle running in the time that lower cylinder UNICOM is on high-tension side, now this compressor only has upper cylinder to carry out compressor work, and compressor is in single cylinder running state; In the time of lower cylinder UNICOM low voltage side, lower cylinder can carry out compressed action, and now compressor is in twin-tub running state.
Single twin-tub switching method of prior art has two kinds:
1, no matter the current operation frequency of compressor is how many, reach after cutting cylinder condition and immediately cut cylinder, this kind of switching method compressor frequency too high or too low in cut cylinder and easily cause and drive protection, reliability can not ensure.
2, compressor carries out certain lifting frequency processing to the operation frequency of compressor after reaching and cutting cylinder condition, then carries out transition switching, so just makes to cut cylinder process need certain transient time, can not when needs are cut cylinder, realize moment and cut cylinder.
Summary of the invention
The present invention aims to provide single twin-tub switching method of a kind of frequency conversion and variable volume compressor, and the single twin-tub that can realize compressor switches fast, and the reliability of can bonding twin-tub switching.
To achieve these goals, according to an aspect of the present invention, provide single twin-tub switching method of a kind of frequency conversion and variable volume compressor, having comprised: step S1: determine compressor operating frequency range when single cylinder is cut twin-tub; Step S2: determine compressor operating frequency range when twin-tub is cut single cylinder; Step S3: detect current compressor behavior and operation frequency, and reach while cutting cylinder condition in the running state of the compressor detecting and operation frequency, carry out rapidly that single cylinder is cut twin-tub action or twin-tub is cut single cylinder action.
As preferably, step S1 comprises: in the time that compressor single cylinder moves, if the general objective frequency f >A of compressor, and the operation frequency A≤f of compressor
awhen <B, reach the twin-tub condition of cutting, all the other time keep single cylinder operation, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub.
As preferably, step S2 comprises: in the time that compressor twin-tub moves, if the general objective frequency f <C of compressor and when the operation frequency fA≤D of compressor, reaches the single cylinder condition of cutting, all the other time keep twin-tub operation, wherein f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, C is single twin-tub operational energy efficiency turning point frequency, and D is the upper limiting frequency value that twin-tub is cut single cylinder.
As preferably, the general objective frequency of compressor is determined in real time according to the operating load of the air conditioner at compressor place self.
As preferably, step S3 comprises: in the time that compressor single cylinder moves, if when f>A and fA>=B, fA carries out raising frequency or frequency reducing taking f/ λ as target; All the other situation fA carry out raising frequency or frequency reducing taking λ f as target, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub, and λ is compressor volume correlation coefficient.
As preferably, step S3 comprises: in the time that compressor twin-tub moves, fA carries out raising frequency or frequency reducing, wherein f taking f as target
afor the current operating frequency of compressor, the general objective frequency that f is compressor.
As preferably, λ determines by λ=(V1+V2)/V2, and wherein V1 is the volume of compressor constant volume cylinder, and 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.
Apply technological scheme of the present invention, single twin-tub switching method of frequency conversion and variable volume compressor comprises: step S1: determine compressor operating frequency range when single cylinder is cut twin-tub; Step S2: determine compressor operating frequency range when twin-tub is cut single cylinder; Step S3: detect current compressor behavior and operation frequency, and reach while cutting cylinder condition in the running state of the compressor detecting and operation frequency, carry out rapidly that single cylinder is cut twin-tub action or twin-tub is cut single cylinder action.Be used as single twin-tub with frequency and be switched and determined condition because single twin-tub of the application's frequency conversion and variable volume compressor switches; therefore can meet the requirements of and in situation, directly carry out single twin-tub switching in frequency; can avoid compressor frequency too high or too low time, cut the driving protection that cylinder causes; ensure that compressor cuts the reliability of cylinder; and can be without carry out transition switching after frequency reducing; can realize moment and cut cylinder, improve and cut cylinder efficiency.
Brief description of the drawings
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart of single twin-tub switching method of frequency conversion according to an embodiment of the invention and variable volume compressor.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Fig. 1 is the flow chart of the frequency conversion of the embodiment of the present invention and single twin-tub switching method of variable volume compressor.As shown in Figure 1, single twin-tub switching method of the frequency conversion of the present embodiment and variable volume compressor comprises: step S1: determine compressor operating frequency range when single cylinder is cut twin-tub; Step S2: determine compressor operating frequency range when twin-tub is cut single cylinder; Step S3: detect current compressor behavior and operation frequency, and reach while cutting cylinder condition in the running state of the compressor detecting and operation frequency, carry out rapidly that single cylinder is cut twin-tub action or twin-tub is cut single cylinder action.
In the time carrying out single twin-tub switching, single twin-tub switching of the application's frequency conversion and variable volume compressor is used as single twin-tub with frequency and is switched and determined condition, therefore can meet the requirements of and in situation, directly carry out single twin-tub switching in frequency, can avoid compressor frequency too high or too low time, cut the driving protection that cylinder causes, ensure that compressor cuts the reliability of cylinder, and because the application is used as with frequency the condition that single twin-tub switches, can reach when single twin-tub switching requires and just switch in frequency, therefore without carry out transition switching after to compressor frequency reducing, can realize moment and cut cylinder, improve and cut cylinder efficiency.
The switching condition that single cylinder is cut twin-tub is: in the time that compressor single cylinder moves, if the general objective frequency f >A of compressor, and the operation frequency A≤f of compressor
awhen <B, reach the twin-tub condition of cutting, all the other time keep single cylinder operation, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub.In the time that compressor single cylinder moves, if operation frequency meets the general objective frequency f >A of compressor in the process changing, and the operation frequency A≤f of compressor
a<B, compressor enters single cylinder and cuts twin-tub state, and completes the switching of single cylinder to twin-tub.Wherein above-mentioned A, B are the compressor operating frequency values of setting according to the working condition of air conditioner, and different air conditioners can arrange different value, can be that fixing numerical value can be also fixing algorithm.
The switching condition that twin-tub is cut single cylinder is: in the time that compressor twin-tub moves, if the general objective frequency f <C of compressor and when the operation frequency fA≤D of compressor, reaches the single cylinder condition of cutting, all the other time keep twin-tub operation, wherein f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, C is single twin-tub operational energy efficiency turning point frequency, and D is the upper limiting frequency value that twin-tub is cut single cylinder.Wherein C, D are that different air conditioners can arrange different value according to the determined compressor operating frequency values of the operation conditions of air conditioner, can be that fixing numerical value can be also fixing algorithm.
In above-mentioned switching method, the general objective frequency f of compressor is definite in real time according to the operating load of the air conditioner at compressor place self, and its value is real-time change with air conditioner load variations, and the general objective frequency f of different transducer air conditionings also can change.
Carry out before single twin-tub switches action at compressor, in the time that compressor single cylinder moves, if when f>A and fA>=B, fA carries out raising frequency or frequency reducing taking f/ λ as target; All the other situation fA carry out raising frequency or frequency reducing taking λ f as target, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub, and λ is compressor volume correlation coefficient.In the time that compressor twin-tub moves, fA carries out raising frequency or frequency reducing, wherein f taking f as target
afor the current operating frequency of compressor, the general objective frequency that f is compressor.
The volume V 1 of above-mentioned parameter lambda and compressor constant volume cylinder (the not cylinder of idle running) is relevant with the volume V 2 of compressor variable volume cylinder (idle running cylinder), λ is determined by formula λ=(V1+V2)/V2 in the present embodiment, wherein V1 is the volume of compressor constant volume cylinder, and V2 is the volume of compressor variable volume cylinder.The value of λ is in order to ensure that compressor single cylinder and twin-tub operation can be with reference to same general objective frequency f, therefore the value of λ also can be determined by other formula, only need to meet compressor single cylinder and twin-tub operation can be with reference to same general objective frequency f.
A and C generally determine according to the working condition of air conditioner, A is generally smaller than λ C, concrete little how many different units may be different, specifically to see and in unit control procedure, whether there will be the situation of frequently cutting cylinder, the difference of A and C is for cutting between cylinder transition zone, and what this interval can prevent from causing because of load minor fluctuations frequently cuts cylinder.
C value is generally got according to single twin-tub operational energy efficiency turning point, for example, under nominal cooling condition, open certain load indoor set refrigerating operaton, in the time of compressor twin-tub, under C1 frequency, test one group of ability, efficiency, when operation with single cylinder, adjusting compressor frequency makes under this single cylinder X1 frequency under ability and twin-tub C1 frequency ability substantially equal to X1 again, obtain one pair of frequency C1 and X1, start upwards to test N class frequency pair from compressor twin-tub operation low-limit frequency, in the time that twin-tub frequency C and single cylinder frequency X ability efficiency are all substantially equal, get C value for single twin-tub efficiency turning point.
The value of D is that the reliability of cutting single cylinder according to compressor twin-tub is determined, general D is greater than C, and different units may be different.When the setting of D value can limit compression machine be cut cylinder, operation frequency can not exceed D value, ensures the reliability of system.
By above-mentioned single twin-tub switching mode, can reach the object that ensures that unit can reliably be cut rapidly cylinder in need to cutting 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.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a single twin-tub switching method for frequency conversion and variable volume compressor, is characterized in that, comprising:
Step S1: determine compressor operating frequency range when single cylinder is cut twin-tub;
Step S2: determine compressor operating frequency range when twin-tub is cut single cylinder;
Step S3: detect current compressor behavior and operation frequency, and reach while cutting cylinder condition in the running state of the described compressor detecting and operation frequency, carry out rapidly that single cylinder is cut twin-tub action or twin-tub is cut single cylinder action.
2. single twin-tub switching method of frequency conversion as claimed in claim 1 and variable volume compressor, is characterized in that, described step S1 comprises:
In the time of described compressor single cylinder operation, if the general objective frequency f >A of described compressor, and the operation frequency A≤f of described compressor
awhen <B, reach the twin-tub condition of cutting, all the other time keep single cylinder operation, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub.
3. single twin-tub switching method of frequency conversion as claimed in claim 2 and variable volume compressor, is characterized in that, described step S2 comprises:
In the time of the operation of described compressor twin-tub, if the general objective frequency f <C of described compressor and when the operation frequency fA≤D of described compressor, reaches the single cylinder condition of cutting, all the other time keep twin-tub operation, wherein f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, C is single twin-tub operational energy efficiency turning point frequency, and D is the upper limiting frequency value that twin-tub is cut single cylinder.
4. single twin-tub switching method of frequency conversion and variable volume compressor as claimed in claim 2 or claim 3, is characterized in that, the general objective frequency of described compressor is determined in real time according to the operating load of the air conditioner self at described compressor place.
5. single twin-tub switching method of frequency conversion as claimed in claim 1 and variable volume compressor, is characterized in that, described step S3 comprises:
In the time of the operation of described compressor single cylinder, if when f>A and fA>=B, fA carries out raising frequency or frequency reducing taking f/ λ as target; All the other situation fA carry out raising frequency or frequency reducing taking λ f as target, wherein A is the lower frequency limit value that single cylinder is cut twin-tub, f
afor the current operating frequency of compressor, the general objective frequency that f is compressor, B is the upper limiting frequency value that single cylinder is cut twin-tub, and λ is compressor volume correlation coefficient.
6. single twin-tub switching method of frequency conversion as claimed in claim 1 and variable volume compressor, is characterized in that, described step S3 comprises:
In the time of described compressor twin-tub operation, fA carries out raising frequency or frequency reducing, wherein f taking f as target
afor the current operating frequency of compressor, the general objective frequency that f is compressor.
7. single twin-tub switching method of frequency conversion as claimed in claim 5 and variable volume compressor, is characterized in that, λ is definite by λ=(V1+V2)/V2, and wherein V1 is the volume of compressor constant volume cylinder, and V2 is the volume of compressor variable volume cylinder.
8. single twin-tub switching method of frequency conversion as claimed in claim 7 and variable volume compressor, is characterized in that, A< λ C, and wherein C is single twin-tub operational energy efficiency turning point frequency.
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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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| CN107860161A (en) * | 2017-09-19 | 2018-03-30 | 珠海格力电器股份有限公司 | Compressor casing switching method, device, storage medium, compressor and equipment |
| CN109026712A (en) * | 2018-06-27 | 2018-12-18 | 珠海格力电器股份有限公司 | Transfiguration control method, device and the intelligent appliance of compressor |
| CN109269039A (en) * | 2018-08-06 | 2019-01-25 | 珠海格力电器股份有限公司 | A kind of control method and coolant circulating system of compressor |
| CN109357452A (en) * | 2018-10-19 | 2019-02-19 | 珠海格力电器股份有限公司 | Compressor casing switching detection method and device, air-conditioning |
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| CN107860161A (en) * | 2017-09-19 | 2018-03-30 | 珠海格力电器股份有限公司 | Compressor casing switching method, device, storage medium, compressor and equipment |
| CN109026712B (en) * | 2018-06-27 | 2020-03-24 | 珠海格力电器股份有限公司 | Variable volume control method and device for compressor and intelligent household appliance |
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| CN109916056B (en) * | 2018-08-17 | 2020-08-14 | 珠海格力电器股份有限公司 | Method and device for controlling cylinder cutting of compressor, unit and air conditioning system |
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| CN109916056A (en) * | 2018-08-17 | 2019-06-21 | 珠海格力电器股份有限公司 | A kind of method, apparatus and unit, air-conditioning system of control compression machine-cut cylinder |
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| WO2020077790A1 (en) * | 2018-10-19 | 2020-04-23 | 珠海格力电器股份有限公司 | Variable capacity compressor operation mode determination method, apparatus, variable capacity compressor, and air conditioner |
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| CN110542194A (en) * | 2019-09-24 | 2019-12-06 | 珠海格力节能环保制冷技术研究中心有限公司 | compressor control method and device, storage medium, processor and compressor |
| CN110779248A (en) * | 2019-10-12 | 2020-02-11 | 珠海格力电器股份有限公司 | Compressor control method, controller and air conditioning unit |
| CN111219880A (en) * | 2019-12-02 | 2020-06-02 | 珠海格力电器股份有限公司 | Three-cylinder compressor mode switching method and device |
| CN115217739A (en) * | 2022-07-12 | 2022-10-21 | 珠海格力电器股份有限公司 | Single-cylinder and double-cylinder switching method for compressor and air conditioning unit |
| CN115217739B (en) * | 2022-07-12 | 2023-08-29 | 珠海格力电器股份有限公司 | Single-double cylinder switching method of compressor and air conditioning unit |
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