CN102536823A - Method for controlling variable capacity and variable exhaust pressure of variable frequency screw compressor - Google Patents
Method for controlling variable capacity and variable exhaust pressure of variable frequency screw compressor Download PDFInfo
- Publication number
- CN102536823A CN102536823A CN2011100002501A CN201110000250A CN102536823A CN 102536823 A CN102536823 A CN 102536823A CN 2011100002501 A CN2011100002501 A CN 2011100002501A CN 201110000250 A CN201110000250 A CN 201110000250A CN 102536823 A CN102536823 A CN 102536823A
- Authority
- CN
- China
- Prior art keywords
- exhaust pressure
- value
- variable
- frozen water
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 230000006835 compression Effects 0.000 claims abstract description 24
- 238000007906 compression Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims description 23
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 239000006200 vaporizer Substances 0.000 claims description 7
- 238000004861 thermometry Methods 0.000 claims description 2
- 239000005457 ice water Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Images
Abstract
A method for controlling variable capacity and variable discharge pressure of an inverter screw compressor, comprising: firstly, setting temperature and tolerance value; secondly, calculating the target value of the compression and exhaust pressure of the rotor; thirdly, acquiring the critical exhaust pressure of the rotor of the compressor; fourthly, whether the critical exhaust pressure of the rotor meets the target value: if the target value of the compression exhaust pressure of the rotor in the step two, the adjacent exhaust pressure of the rotor in the step three and the allowable error value are compared, if the target value of the compression exhaust pressure of the rotor in the step two and the adjacent exhaust pressure of the rotor in the step three are not matched with the allowable error value, adjusting the position of a sliding block of the compressor; and if the temperature is consistent with the preset temperature, judging whether the water outlet temperature of the ice water is equal to the rated water outlet temperature or whether the water inlet temperature of the ice water is equal to the rated water inlet temperature: if the two values are equal, ending, if the two values are not equal, adjusting the rotating speed of the compressor to meet the capacity requirement: the rotational speed of the compressor is changed to satisfy the capacity requirement of an ice and water machine. The invention keeps the compression efficiency at a high peak value by sensing and adjusting the position of the slide block to accord with the optimal compression ratio of the working state at that time.
Description
Technical field
The present invention relates to a kind of controlling method of variable capacity and variable exhaust pressure of frequency conversion screw compressor, it is through control compressor rotary speed and adjustment slide position, reaches and satisfies compression volume and the optimum discharge pressure purpose with the lifting compression efficiency.
Background technique
Compressor is the driving element in the freeze cycle, often plays the part of pivotal player, thus become various patterns in response to the different development of demand, like scroll compressor, centrifugal compressor and screw compressor.Wherein, Screw compressor is to dwindle the sealed volume between male rotor and the mother rotor through rotor rotation, to reach compression effects, so when many practical application in industry; The load of ice water system often has change with running pressure; Mostly only can satisfy the demand of load regulation with existing technology of compressors, change and can't adjust in real time, so all influential to the wasted work and the efficient of compressor with corresponding pressure.
The existing technology that changes the exhaust pressure of rotor about screw compressor all is used for the air compression purposes, and is that slide block with the rotor high voltage terminal moves the sealed vol that changes high pressure section and reaches the purpose that changes exhaust pressure.
And existing refrigerant screw compressor to be slide block with the rotor low voltage terminal move the sealed vol that changes low pressure stage reaches the control capacity; But not control exhaust pressure; So when slide block is adjusted to the demand position of satisfying capacity; Will be only can corresponding a certain fixedly minimum cylinder volume ratio, this minimum cylinder volume than maybe and nonoptimal value.Compressor can't the various operating modes of real time reaction pressure or volume ratio change, be prone to cause the phenomenon of insufficient compression or excess compression, therefore existing adjustment compressor volume still has great lifting usefulness to improve the space than the mode with volume controlled.
In addition, converter technique promotes in recent years, and various compressor is attempted with frequency variator as its motor driver, as the instrument of volume controlled invariably.Yet the present stage technology of screw compressor still is confined to the fixedly application of minimum cylinder volume ratio; Meaning is promptly at frozen water machine system end; Its ability and the significant change of minimum cylinder volume ratio under different operating modes; Right this mode is only adjusted its rotating speed with the VFC mode in compressor side, makes its requirement that meets refrigerating capacity, ignores minimum cylinder volume than the phenomenon that has changed; Especially when system was in height pressure reduction less than the operating condition of design load, the theoretical efficiency value difference under its usefulness and this condition was different particularly evident.
Summary of the invention
In view of above-mentioned shortcoming, the object of the present invention is to provide a kind of controlling method of variable capacity and variable exhaust pressure of frequency conversion screw compressor, through the adjustment compressor rotary speed; To satisfy capacity requirement; And the adjustment slide position, with the exhaust pressure of control compressor, promote compression efficiency.
In order to reach above-mentioned purpose, technological means of the present invention is to provide a kind of controlling method of variable capacity and variable exhaust pressure of frequency conversion screw compressor, and its step includes:
One, setting temperature and permissible error value: set a specified frozen water water outlet or go into the permissible error value that coolant-temperature gage, a frozen water measured value and rating value permissible error value, are faced exhaust pressure and desired value;
Two, calculate the desired value of the compression exhaust pressure of rotor: the adjustment desired value of facing exhaust pressure of calculating compressor drum;
Three, obtain compressor rotor face exhaust pressure;
Four, the exhaust pressure of facing of rotor meets desired value: if the rotor of the desired value of the bitrochanteric compression exhaust pressure of this step, this step 3 face exhaust pressure with permissible error value three compares, as if not meeting, then to step 5; If meet, then to step 6;
Five, the slide position of adjustment compressor;
Six, the frozen water water-exit temperature is equal to specified water-exit temperature or frozen water is not gone into coolant-temperature gage and is equal to the specified coolant-temperature gage of going into: if be equal to, then finish, if be not equal to, then to step 7;
Seven, the adjustment compressor rotary speed is to satisfy capacity requirement: change the rotating speed of compressor, make the capacity requirement that satisfies a frozen water machine.
Aforesaid step 2, the desired value of the compression exhaust pressure of rotor are with the pressure measuring value of a condenser or the corresponding saturation pressure value of thermometry, add a force value, to define.
Aforesaid step 3 further has the step of the acquisition mode that faces exhaust pressure of a selection rotor.
Aforesaid step 3 can be divided into step 3 A and step 3 B:
Step 3 A: with the exhaust pressure of facing of slide position sensing method calculating compressor, it adopts compressor volume ratio and slide position relation, calculates the exhaust pressure of compressor with the slide position.
Step 3 A, it further has:
A, measurement slide position: the slide position of one of them sensing compressor of a slider position sensor or foucault current.
B, choose volume ratio and slide position relation according to the refrigerant kind, and calculate real-time volume ratio: according to the kind of the employed refrigerant of frozen water machine, corresponding its volume ratio and slide position relation are to extrapolate real-time volume ratio.
C, calculate the exhaust pressure of facing of compressor according to real-time volume ratio and pressure of inspiration(Pi): measure a pressure of inspiration(Pi) in the suction location of rotor, pressure of inspiration(Pi) calculates with real-time volume ratio and faces exhaust pressure.
D, whether face exhaust pressure and meet desired value: whether face the desired value of exhaust pressure equivalent steps two, if be equal to then to steps A; If facing exhaust pressure is not equal to desired value, then to step e.
E, according to compressor volume ratio and slide position relation; Calculate the adjustment target location of slide block, and moving slider to specified position according to this: the desired value with the bitrochanteric compression exhaust pressure of step is an input value, again according to compressor volume ratio and slide position relation; To calculate the adjustment target location of slide block; And slide block adjusted position so far, after the adjustment, then be back to steps A.
This step 3 B: adopt the direct pressure method of measurement to obtain the exhaust pressure of facing of rotor.
This step 3 B, it further has:
F, measure the exhaust pressure of facing of rotor: the exhaust pressure of facing of measuring rotor through pressure sensing element.
G, whether face exhaust pressure and meet desired value: if this step F face the desired value that exhaust pressure meets the exhaust pressure of this step 2, then finish; This step F face the desired value that exhaust pressure does not meet the exhaust pressure of this step 2, then to step H.
H, adjustment slide position: the position of adjustment slide block, after the adjustment, then to step F.
Aforesaid step 4 if the desired value of the exhaust pressure of step 2 deducts the absolute value of exhaust pressure gained of step 3 A greater than the permissible error value, does not then meet; If absolute value less than the permissible error value, then meets; Perhaps, if the absolute value that faces the exhaust pressure gained that the desired value of the exhaust pressure of step 2 deducts step 3 B does not then meet greater than the permissible error value; If absolute value less than the permissible error value, then meets.
Aforesaid step 5, the slide position is adjusted, until the desired value of exhaust pressure deduct face exhaust pressure absolute value less than the permissible error value.
Aforesaid step 6, it measures the frozen water water-exit temperature of a vaporizer, if the frozen water water-exit temperature deducts the absolute value of value of specified frozen water water outlet gained less than frozen water measured value and rating value permissible error value, is and is equal to; If absolute value greater than frozen water measured value and rating value permissible error value, then is not equal to; Perhaps, deduct the absolute value of value that specified frozen water goes into the coolant-temperature gage gained less than frozen water measured value and rating value permissible error value, be and be equal to if frozen water is gone into coolant-temperature gage; If absolute value greater than frozen water measured value and rating value permissible error value, then is not equal to.
Aforesaid step 7, it is a Frequency Converter Control output frequency, with the rotating speed of change compressor, and gets back to the requirement that step 6 judges whether to satisfy frozen water machine rated temperature.
Comprehensively above-mentioned, the controlling method of the variable capacity of frequency conversion screw compressor of the present invention and variable exhaust pressure has following at least advantage:
1, through mobility adjustment slide position, with the control exhaust pressure, so do not have the phenomenon of insufficient compression or excess compression, further mobility is adjusted compressor rotary speed again, to increase or to reduce refrigerant circulation.
2, when improving compressor rotary speed, its tip speed also can promote, to promote compression efficiency.
3, combine the mode of adjustment slide block and rotating speed, and make the present invention be able to be applied under the operating condition of various frozen water machines, continue to provide high-effect.
4, the alternative use with the outside system's running pressure of compressor drum of the present invention calculated the slide position, to obtain optimal compression machine rotor exhaust pressure; The method of perhaps facing exhaust pressure with direct measurement rotor, the adjustment slide position is so the present invention has more elasticity and convenience on reality is used.
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Description of drawings
Fig. 1 is the frozen water machine system schematic of the controlling method of the variable capacity of using frequency conversion screw compressor of the present invention and variable exhaust pressure;
Fig. 2 is the flow chart of controlling method of variable capacity and the variable exhaust pressure of frequency conversion screw compressor of the present invention;
Fig. 3 has the slide position detective device for screw compressor and rotor faces the cross-sectional schematic that exhaust pressure is measured;
Fig. 4 is for measuring the flow chart that faces first embodiment of exhaust pressure with adjustment;
Fig. 5 is for measuring the flow chart that faces second embodiment of exhaust pressure with adjustment.
Wherein, reference character
10 vaporizers
11 compressors
110 slide blocks
111 compressor air suction pressure
112 Compressor Discharge Pressures
113 compressor drums
114 compressing section rotors face the exhaust pressure measuring port
12 controllers
13 condensers
130 condenser pressure values
131 condenser temperature values
140 frozen water water-exit temperatures
141 frozen water are gone into coolant-temperature gage
15 frequency variators
20～27 steps
30～34 steps
40～43 steps
The S1 slide position
Embodiment
Below be through particular specific embodiment mode of execution of the present invention to be described, those of ordinary skill can be understood advantage of the present invention and effect easily by the content that this specification disclosed in the affiliated technical field.
Please cooperate with reference to figure 1, Fig. 2 and shown in Figure 3, the present invention is a kind of controlling method of variable capacity and variable exhaust pressure of frequency conversion screw compressor, and its step includes:
One, setting temperature and permissible error value (step 20): in a controller 12 of the system end of a frozen water machine set the specified frozen water water outlet of a vaporizer 10 or go into coolant-temperature gage (hereinafter to be referred as; Ts) with a frozen water measured value and rating value permissible error value (hereinafter to be referred as; ErrT); And compressor 11 one face the desired value of exhaust pressure and system end the permissible error value (hereinafter to be referred as, ErrPd).
Two, calculate the compression exhaust pressure of rotor desired value (hereinafter to be referred as; Pd; Op) (step 21): by the measured pressure value 130 of a condenser 13 of system end or measure the corresponding saturation pressure value of temperature 131; Add a suitable force value, with the adjustment target of facing exhaust pressure as compressor 11.
Three, select the acquisition mode (step 22) that faces exhaust pressure 112 of the rotor 113 of compressor 11: four A or four B arrive according to selection mode.
Four A, with slide position sensing method calculate rotor face exhaust pressure (hereinafter to be referred as; Pd, c1) (step 231): it is the method with slider position sensor or foucault current, to learn the position of slide block 110; Volume ratio and slide position relation with slide position input compressor 11; And indirect calculation goes out the exhaust pressure Pd of compressor 11, c1, and to five.
Four B, (hereinafter to be referred as, Pd, ms) (step 232) tried to achieve Pd, behind the ms, to five to adopt the direct pressure method of measurement to obtain the exhaust pressure of facing of rotor.
Five, whether rotor face exhaust pressure Pd, c1 meets desired value Pd, op (step 24): if Pd, op deducts Pd, the absolute value of c1 gained (hereinafter to be referred as, Err Pd, 1) greater than ErrPd, promptly do not meet, then to six; If Err Pd, 1 less than ErrPd, promptly meets, then to seven.
Another pattern, if Pd, op deducts Pd, the absolute value of ms gained does not promptly meet greater than ErrPd, then to six; If Pd, op deducts Pd, and the absolute value of ms gained promptly meets less than ErrPd, then to seven.
Six, the slide position (step 25) of adjustment compressor: slide block 110 positions are adjusted, and until ErrPd, 1 less than till the ErrPd.
Wherein, four to six exhaust pressure sensing and adjustment mode can further be selected another kind of method for use, ask for an interview the back and detail.
Seven, the frozen water water-exit temperature is equal to specified water-exit temperature or frozen water is not gone into coolant-temperature gage and is equal to the specified coolant-temperature gage (step 26) of going into: measure vaporizer 10 frozen water water outlet 140 (hereinafter to be referred as; T2) or frozen water go into coolant-temperature gage 141 (hereinafter to be referred as; T1), if T1 or T2 deduct the absolute value of value of Ts gained less than ErrT, promptly be equal at last; Then finish (step 260), stop this control flow; If T2 or T1 deduct the absolute value of value of Ts gained greater than ErrT, promptly be not equal to, then to eight.
Eight, the rotating speed of adjustment compressor is to satisfy capacity requirement (step 27): with frequency variator 15 control output frequencies, changing the rotating speed of compressor 11, and be back to seven and judge whether to satisfy frozen water machine capacity requirement.
Control system will continue to carry out this control circle, with the factor of carrying out possibly changing the frozen water water outlet or going into coolant-temperature gage setting Ts in response to any, go into coolant-temperature gage 141 changes, thermal load change, user's requirement etc. like variation of ambient temperature, frozen water.
Aforesaid four and six, repeat because of subprogram is arranged, and this program has two kinds of mode of executions, so this program is illustrated one by one in paragraph subsequently.
Please cooperate with reference to figure 3 and shown in Figure 4, four A (step 231), it is the Pd that calculates compressor 11 with slide block 110 location sensing methods, c1, details are as follows for this step:
A, measure slide position (step 30): with slide block 110 positions of slider position sensor or foucault current sensing compressor 11 (hereinafter to be referred as, S1).
B, choose the volume ratio and the slide position relation of compressor, and calculate that real-time volume ratio is (hereinafter to be referred as, Vi according to the refrigerant kind; C1) (step 31): according to the kind of the employed refrigerant of frozen water machine; Select existing volume ratio and slide position relation, to extrapolate Vi, c1.
C, according to real-time volume ratio (Vi, c1) with pressure of inspiration(Pi) calculate compressor face exhaust pressure (hereinafter to be referred as, Pd, c1) (step 32): measure a pressure of inspiration(Pi) 111 in the suction location of rotor 113, according to pressure of inspiration(Pi) and Vi, c1 can calculate Pd, c1.
D, whether face exhaust pressure Pd, c1 meets desired value Pd, and op 33: if Pd, c1 meets Pd, and op is then to A; If Pd, c1 does not meet Pd, and op is then to E.
E, according to compressor volume ratio and slide position relation, calculate the adjustment target location of slide block, and moving slider to intended target position (step 34) according to this: with Pd; Op is an input value; And, calculating the adjustment target location of slide block 110, and slide block 110 is adjusted position so far according to compressor 11 volume ratios and slide block 110 positions relation; After the adjustment, then be back to A.
Please cooperate with reference to figure 3 and shown in Figure 5, four B (step 232), it is to adopt the direct pressure method of measurement to obtain the Pd of rotor 113, ms, details are as follows for this step:
F, measure rotor face exhaust pressure (step 40): face exhaust pressure Pd through what pressure sensing element was measured rotor 113, ms 114.
G, whether face exhaust pressure Pd, ms meets desired value Pd, and op 41: if Pd, ms meets Pd, and op then finishes (step 43); If Pd, ms does not meet Pd, and op is then to H.
H, adjustment slide position S1 (step 42): the position S1 of adjustment slide block 110, after the adjustment, then get back to F.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (14)
1. the controlling method of the variable capacity of a frequency conversion screw compressor and variable exhaust pressure is characterized in that step includes:
One, setting temperature and permissible error value: set a specified frozen water water outlet or go into the permissible error value that coolant-temperature gage, a frozen water measured value and rating value permissible error value, are faced exhaust pressure and desired value;
Two, calculate the desired value of the compression exhaust pressure of rotor: the adjustment desired value of facing exhaust pressure of calculating compressor;
Three, obtain compressor rotor face exhaust pressure;
Four, the exhaust pressure of facing of rotor meets desired value: if the rotor of the desired value of the bitrochanteric compression exhaust pressure of this step, this step 3 face exhaust pressure with this permissible error value three compares, as if not meeting, then to step 5; If meet, then to step 6;
Five, the slide position of adjustment compressor;
Six, the frozen water water-exit temperature is equal to specified water-exit temperature or frozen water is not gone into coolant-temperature gage and is equal to the specified coolant-temperature gage of going into: if be equal to, then finish, if be not equal to, then to step 7;
Seven, the adjustment compressor rotary speed is to satisfy capacity requirement: change the rotating speed of compressor, make the capacity requirement that satisfies a frozen water machine.
2. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 1 and variable exhaust pressure; It is characterized in that; In this step 1; This specified frozen water water outlet or go into the permissible error value that coolant-temperature gage, this frozen water measured value and rating value permissible error value and are faced exhaust pressure and desired value, it is located in the controller of system end of a frozen water machine, this specified frozen water water outlet or go into coolant-temperature gage, this frozen water measured value for being taken from vaporizer; In this step 3, rotor face exhaust pressure for being taken from a compressor.
3. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 2 and variable exhaust pressure; It is characterized in that; In this step 2; The desired value of the compression exhaust pressure of rotor is with the pressure measuring value of a condenser or the corresponding saturation pressure value of thermometry, adds a force value, to define.
4. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 3 and variable exhaust pressure is characterized in that, further has the step of the acquisition mode that faces exhaust pressure of a selection rotor between this step 3 and the step 4.
5. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 4 and variable exhaust pressure is characterized in that, this step 3 is divided into step 3 A and step 3 B;
This step 3 A: the exhaust pressure of facing of calculating compressor with slide position sensing method;
This step 3 B: adopt the direct pressure method of measurement to obtain the exhaust pressure of facing of rotor.
6. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 5 and variable exhaust pressure; It is characterized in that; This step 3 A, it is to adopt this compressor volume ratio and slide position relation, calculates the exhaust pressure of compressor with the slide position.
7. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 6 and variable exhaust pressure; It is characterized in that; In this step 4,, then do not meet if the exhaust pressure of this step 2 deducts the absolute value of exhaust pressure gained of this step 3 A greater than this permissible error value; If this absolute value less than this permissible error value, then meets.
8. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 5 and variable exhaust pressure; It is characterized in that; In this step 4, if the absolute value that faces the exhaust pressure gained that the exhaust pressure of this step 2 deducts this step 3 B does not then meet greater than this permissible error value; If absolute value less than this permissible error value, then meets.
9. according to the controlling method of the variable capacity and the variable exhaust pressure of claim 7 or 8 described frequency conversion screw compressors, it is characterized in that in this step 5, this slide position is adjusted, until this absolute value less than this permissible error value.
10. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 1 and variable exhaust pressure; It is characterized in that; In this step 6; It measures the frozen water water-exit temperature of a vaporizer, if this frozen water water-exit temperature deducts the absolute value of value of this specified frozen water water outlet gained less than this frozen water measured value and rating value permissible error value, is and is equal to; If this absolute value greater than this frozen water measured value and rating value permissible error value, then is not equal to.
11. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 10 and variable exhaust pressure; It is characterized in that; In this step 6; Its frozen water that can further measure this vaporizer is gone into coolant-temperature gage, deducts the absolute value of value that this specified frozen water goes into the coolant-temperature gage gained less than this frozen water measured value and rating value permissible error value if this frozen water is gone into coolant-temperature gage, is to be equal to; If this absolute value greater than this frozen water measured value and rating value permissible error value, then is not equal to.
12. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 1 and variable exhaust pressure; It is characterized in that; In this step 7; It is a Frequency Converter Control output frequency, changing the rotating speed of this compressor, and gets back to this step 6 and judges whether to satisfy this frozen water machine capacity requirement.
13. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 5 and variable exhaust pressure is characterized in that, this step 3 A, and it further has:
A, measurement slide position: the slide position of one of them this compressor of sensing of a slider position sensor or foucault current;
B, choose volume ratio and slide position relation according to the refrigerant kind, and calculate real-time volume ratio: according to the kind of the employed refrigerant of this frozen water machine, corresponding its volume ratio and slide position relation are to extrapolate real-time volume ratio;
C, calculate the exhaust pressure of facing of compressor according to real-time volume ratio and pressure of inspiration(Pi): measure a pressure of inspiration(Pi) in the suction location of this rotor, this pressure of inspiration(Pi) and this real-time volume ratio calculate this and face exhaust pressure;
D, whether face exhaust pressure and meet desired value: if this faces the desired value that exhaust pressure meets this exhaust pressure, then to this steps A; If this faces the desired value that exhaust pressure does not meet this exhaust pressure, then to step e;
E, according to compressor volume ratio and slide position relation; Calculate the adjustment target location of slide block, and moving slider to specified position according to this: the exhaust pressure with this step D is an input value, again according to this compressor volume than and this slide position relation; To calculate the adjustment target location of this slide block; And this slide block adjusted position so far, after the adjustment, then be back to steps A.
14. the controlling method of the variable capacity of frequency conversion screw compressor according to claim 5 and variable exhaust pressure is characterized in that, this step 3 B, and it further has:
F, measure the exhaust pressure of facing of rotor: the exhaust pressure of facing of measuring this rotor through pressure sensing element;
G, whether face exhaust pressure and meet desired value: if this step F face the desired value that exhaust pressure meets the exhaust pressure of this step 2, then finish; This step F face the desired value that exhaust pressure does not meet the exhaust pressure of this step 2, then to step H;
H, adjustment slide position: adjust the position of this slide block, after the adjustment, then to this step F.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW099144582 | 2010-12-17 | ||
| TW99144582A TWI400415B (en) | 2010-12-17 | 2010-12-17 | Controlling method of changeable capacity and changeable discharge pressure of a variable speed screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102536823A true CN102536823A (en) | 2012-07-04 |
| CN102536823B CN102536823B (en) | 2014-07-23 |
Family
ID=46344572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110000250.1A Active CN102536823B (en) | 2010-12-17 | 2011-01-04 | Method for controlling variable capacity and variable exhaust pressure of variable frequency screw compressor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102536823B (en) |
| TW (1) | TWI400415B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797897A (en) * | 2012-08-24 | 2015-07-22 | 开利公司 | Transcritical refrigerant vapor compression system high side pressure control |
| CN104949282A (en) * | 2015-06-30 | 2015-09-30 | 重庆美的通用制冷设备有限公司 | Method and device for judging position of sliding block of compressor |
| CN105466093A (en) * | 2015-11-17 | 2016-04-06 | 广东美的制冷设备有限公司 | Virtual detection method and device for discharge pressure and back pressure of compressor |
| CN105841413A (en) * | 2016-03-29 | 2016-08-10 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN109556331A (en) * | 2018-12-12 | 2019-04-02 | 珠海格力电器股份有限公司 | A kind of water chiller and its temperature control method of water |
| CN109827378A (en) * | 2019-01-28 | 2019-05-31 | 长虹美菱股份有限公司 | Regulation method and device for refrigeration equipment frequency-changeable compressor operation step-out |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI691651B (en) * | 2019-06-06 | 2020-04-21 | 國立臺北科技大學 | Screw compression system with real-time variable built-in volume ratio and method of operating the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351160A (en) * | 1980-06-16 | 1982-09-28 | Borg-Warner Corporation | Capacity control systems for screw compressor based water chillers |
| JP2004263631A (en) * | 2003-03-03 | 2004-09-24 | Kobe Steel Ltd | Screw compressor and method for operating the same |
| US20070172370A1 (en) * | 2006-01-25 | 2007-07-26 | Masahiko Takano | Capacity control device and capacity control method for screw compressor |
| JP2008169723A (en) * | 2007-01-10 | 2008-07-24 | Kobe Steel Ltd | Method for operating compressor |
| CN100406738C (en) * | 2002-10-16 | 2008-07-30 | 大金工业株式会社 | Variable inner volume ratio-type inverter screw compressor |
| CN101251110B (en) * | 2008-01-08 | 2010-06-16 | 烟台冰轮股份有限公司 | Automatic control device and control method for multiple overlapping type compressor unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1844236B1 (en) * | 2005-02-02 | 2011-04-06 | Elgi Equipments Ltd. | A system and a method for capacity control in a screw compressor |
-
2010
- 2010-12-17 TW TW99144582A patent/TWI400415B/en active
-
2011
- 2011-01-04 CN CN201110000250.1A patent/CN102536823B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351160A (en) * | 1980-06-16 | 1982-09-28 | Borg-Warner Corporation | Capacity control systems for screw compressor based water chillers |
| CN100406738C (en) * | 2002-10-16 | 2008-07-30 | 大金工业株式会社 | Variable inner volume ratio-type inverter screw compressor |
| JP2004263631A (en) * | 2003-03-03 | 2004-09-24 | Kobe Steel Ltd | Screw compressor and method for operating the same |
| US20070172370A1 (en) * | 2006-01-25 | 2007-07-26 | Masahiko Takano | Capacity control device and capacity control method for screw compressor |
| JP2008169723A (en) * | 2007-01-10 | 2008-07-24 | Kobe Steel Ltd | Method for operating compressor |
| CN101251110B (en) * | 2008-01-08 | 2010-06-16 | 烟台冰轮股份有限公司 | Automatic control device and control method for multiple overlapping type compressor unit |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797897A (en) * | 2012-08-24 | 2015-07-22 | 开利公司 | Transcritical refrigerant vapor compression system high side pressure control |
| US10451325B2 (en) | 2012-08-24 | 2019-10-22 | Carrier Corporation | Transcritical refrigerant vapor compression system high side pressure control |
| CN104949282A (en) * | 2015-06-30 | 2015-09-30 | 重庆美的通用制冷设备有限公司 | Method and device for judging position of sliding block of compressor |
| CN104949282B (en) * | 2015-06-30 | 2017-12-08 | 重庆美的通用制冷设备有限公司 | The determination methods and device of compressor slide position |
| CN105466093A (en) * | 2015-11-17 | 2016-04-06 | 广东美的制冷设备有限公司 | Virtual detection method and device for discharge pressure and back pressure of compressor |
| CN105466093B (en) * | 2015-11-17 | 2017-12-19 | 广东美的制冷设备有限公司 | The pressure at expulsion of compressor and the virtual detection method and device of back pressure |
| CN105841413A (en) * | 2016-03-29 | 2016-08-10 | 广东美的制冷设备有限公司 | Air conditioner control method and device |
| CN105841413B (en) * | 2016-03-29 | 2018-06-26 | 广东美的制冷设备有限公司 | Air-conditioner control method and device |
| CN109556331A (en) * | 2018-12-12 | 2019-04-02 | 珠海格力电器股份有限公司 | A kind of water chiller and its temperature control method of water |
| CN109827378A (en) * | 2019-01-28 | 2019-05-31 | 长虹美菱股份有限公司 | Regulation method and device for refrigeration equipment frequency-changeable compressor operation step-out |
| CN109827378B (en) * | 2019-01-28 | 2021-08-03 | 长虹美菱股份有限公司 | Method and device for regulating and controlling running out-of-step of variable frequency compressor of refrigeration equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201226822A (en) | 2012-07-01 |
| CN102536823B (en) | 2014-07-23 |
| TWI400415B (en) | 2013-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102536823B (en) | Method for controlling variable capacity and variable exhaust pressure of variable frequency screw compressor | |
| EP3129719B1 (en) | Hvac systems and controls | |
| CN102884382B (en) | Method for controlling fan for heat source heat exchanger, and air conditioning device | |
| CN104633942B (en) | Frequency conversion air injection enthalpy increasing heat pump water heater frequency is adjusted and control method | |
| CN103534534B (en) | The unit number control method of heat source system and heat source system | |
| CN104990222B (en) | Air conditioning control method and device | |
| CN107289599B (en) | Device and method for detecting leakage amount of air conditioner refrigerant | |
| US9388815B2 (en) | Multiple-capacity centrifugal compressor and control method thereof | |
| CN107631527B (en) | Method and system for detecting whether variable-frequency refrigeration equipment lacks refrigerant | |
| JP5185298B2 (en) | Compressor control method and system | |
| TWI453363B (en) | Dynamic adjustment method of ice water temperature in ice water host | |
| CN106839319B (en) | A kind of compressor of air conditioner method for controlling number of revolution | |
| Chen et al. | Theoretical and experimental investigation on the performance of screw refrigeration compressor under part-load conditions | |
| CN107990497B (en) | Progress control method, device, compressor and computer readable storage medium | |
| CN101832689B (en) | Method and system for controlling compressor | |
| CN105020951B (en) | A kind of Parallel sets energy-saving run regulating system and its control method | |
| CN104776633A (en) | Hybrid power refrigeration system and control method thereof | |
| CN102467135B (en) | Refrigerant liquid level control method for flooded evaporator | |
| CN113375284B (en) | External fan control method and device and air conditioner | |
| CN102384558B (en) | Capacity control method for direct-expansion-type variable air conditioner system | |
| CN104514705A (en) | Pumping system control | |
| CN105423667B (en) | The control method and compressor assembly of compressor assembly | |
| CN204063773U (en) | A kind of Parallel sets energy-saving run control set for adjusting | |
| CN107883571A (en) | Frequency conversion two-stage compression heat pump water heater frequency dynamic optimizes and control method | |
| CN114353428A (en) | Control method for energy-saving refrigeration of refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |