CN101122290A - Screw compressor - Google Patents

Screw compressor Download PDF

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Publication number
CN101122290A
CN101122290A CNA2007101384742A CN200710138474A CN101122290A CN 101122290 A CN101122290 A CN 101122290A CN A2007101384742 A CNA2007101384742 A CN A2007101384742A CN 200710138474 A CN200710138474 A CN 200710138474A CN 101122290 A CN101122290 A CN 101122290A
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CN
China
Prior art keywords
mentioned
inverter
helical
rotating speed
motor
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Granted
Application number
CNA2007101384742A
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Chinese (zh)
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CN100547244C (en
Inventor
米本龙一郎
饭冢泰成
东条健司
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Hitachi Johnson Controls Air Conditioning Inc
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Hitachi Appliances Inc
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Publication of CN101122290A publication Critical patent/CN101122290A/en
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    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
    • 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
    • F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
    • F04C28/12—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves
    • F04C28/125—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using sliding valves with sliding valves controlled by the use of fluid other than the working fluid
    • 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
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F04C2240/403—Electric motor with inverter for speed control
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/18—Pressure
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/42—Conditions at the inlet of a pump or machine
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/44—Conditions at the outlet of a pump or machine
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements

Abstract

A screw compressor is for use of a screw chiller, and comprises a pair of screw rotors and a casing housing the screw rotors, a capacity control valve for varying a ratio of volume, a motor for driving the screw rotors and an inverter for varying the rotational speed of the motor. The screw compressor is controlled using rotational speed control means by the inverter and mechanical capacity control means by the capacity control valve independently or combined together according to loads. The maximum efficient point in a capacity control performed solely by the inverter is set to a rotational speed side lower than the rated operation point. In a region where the rotational speed is higher than the maximum efficient point, the inverter solely takes control from a rated rotational speed to a high rotational speed side.

Description

Helical-lobe compressor
Technical field
The present invention relates to helical-lobe compressor, be particularly suitable for the helical-lobe compressor of screw rod cooling usefulness.
Background technique
As the employed helical-lobe compressor of refrigerating plant in the past, there is the spy to open helical-lobe compressor clear and that 59-211790 communique (patent documentation 1) is put down in writing.The scroll compressor of this patent documentation 1 carries out the running that can change volume ratio by the Unloading Control of carrying out based on capacity control drive (guiding valve) in the refrigerating machine capacity is the volume controlled scope of 100-75%.In addition, in the refrigerating machine capacity is the volume controlled scope of 75-37.5%, pass through inverter, with the rotating speed speedup to 1.5 of helical-lobe compressor times, in the refrigerating machine capacity is the scope of 50-25%, use capacity control drive,, carry out the running that can change volume ratio with this.By carrying out this running, reach than the better efficient of 100% load running.
In addition, as other helical-lobe compressor in the past, there is the spy to open the helical-lobe compressor of 2004-137934 communique (patent documentation 2) record.The helical-lobe compressor of this patent documentation 2 is in order to reach and the corresponding only compressor efficiency of the operational situation of helical-lobe compressor, when ability is adjusted, the shared rotating speed control of carrying out based on inverter and by variable VI valve change compression section finish time, the compression ratio control that volume ratio is changed.
[patent documentation 1] spy opens clear 59-211790 communique
[patent documentation 2] spy opens the 2004-137934 communique
In the helical-lobe compressor of above-mentioned patent documentation 1, make the rotating speed speedup to certain rotating speed because be, in the scope of 50-25%, use the method for operation of capacity control drive, so have the increase of the mechanical loss that causes because of speedup, and problem that significantly improves because of the unpredictable performance of the bypass of carrying out based on capacity control drive.
And, in the helical-lobe compressor of patent documentation 1,2, the effective utilization as screw rod cooling usefulness is not disclosed.Promptly, in the compressor of screw rod cooling usefulness, though compare than running with specified refrigerating capacity with 100%, mostly be low refrigerating capacity ratio greatly, for example near specified 80%, turn round, still, in the helical-lobe compressor of patent documentation 1,2, owing to be controlled so as to by specified running and reach best efficiency point, so, do not have energy efficiency to turn round well as the compressor of screw rod cooling usefulness.
The objective of the invention is to obtain a kind of as helical-lobe compressor screw rod cooling usefulness, that can efficient turn round well.
Summary of the invention
To achieve these goals, the present invention is the helical-lobe compressor of screw rod cooling usefulness, have a pair of screw rotor and take in its housing, the capacity control drive that can change volume ratio, drive the motor of above-mentioned screw rotor and the inverter that can change to the rotating speed of this motor, it constitutes, corresponding with load, independent or sharedly control based on the rotating speed control member of above-mentioned inverter with based on the capacitance control member of above-mentioned capacity control drive, simultaneously, best efficiency point under the independent volume controlled situation that will carry out based on above-mentioned inverter is set in rotating speed one side lower than specified operation point, than the big zone of this best efficiency point rotating speed from rated speed to high rotating speed side, only control by above-mentioned inverter.
Relevant better concrete configuration example of the present invention is as described below.
(1) when the running that requires smaller or equal to the rotary speed area of above-mentioned best efficiency point, corresponding with ability, shared based on above-mentioned inverter the rotating speed control member and turn round based on the capacitance control member of above-mentioned capacity control drive, make the efficient maximum.
(2) above-mentioned capacity control drive can change the compression initial position that is arranged on above-mentioned housing.
(3) will based on above-mentioned inverter carry out best efficiency point under the situation of independent volume controlled be set in specified refrigerating capacity 80% near.
(4) suction side pressure and the discharge side pressure with above-mentioned a pair of screw rotor is corresponding with load, according to the rotating speed of said motor, the position of above-mentioned capacity control drive is controlled.
(5) produce unusually at above-mentioned inverter, under the situation that the running of the said motor of carrying out based on this inverter can not continue, on a crash basis this motor directly is attached to source power supply, proceeds so far before such volume controlled running based on above-mentioned capacity control drive.
The invention effect
According to the present invention, can access a kind of as helical-lobe compressor screw rod cooling usefulness, that can efficient turn round well.
Description of drawings
Fig. 1 is the sectional view of the helical-lobe compressor of expression one embodiment of the present of invention.
Fig. 2 is the action specification figure of the capacity control drive of Fig. 1.
Fig. 3 is the characteristic figure of expression with respect to the compressor efficiency of the ratio of the refrigerating capacity in the helical-lobe compressor of Fig. 1.
Symbol description
1... main casing, 1b... recess, 2... screw rotor, 2A... male rotor, 3... motor stator, 4... motor rotor, 5... inverter, 6,7... roller bearing, 8... ball bearing, 9... inlet hole, 10... tap hole, 11... capacity control drive, 12... bar, 13... hydraulic piston, 14... helical spring, 15... cylinder, 16... motor casing, 17... compressor section, 18... motor part, 19... exhaust port, 20... suction port, 21... discharge housing, 22... motor part, 23... control gear, 24... suction pressure sensor, 25... head pressure sensor, 26... control valve portion, 27... condenser, 28... expansion valve, 29... vaporizer, 29a... refrigerant piping, 29b... cold water pipe arrangement, 30... fan, 31... temperature transducer.
Embodiment
Below, use Fig. 1-Fig. 3, one embodiment of the present of invention are described.Fig. 1 is the sectional view of the helical-lobe compressor of expression one embodiment of the present of invention, and Fig. 2 is the action specification figure of the capacity control drive of Fig. 1, and Fig. 3 is the characteristic figure of expression with respect to the compressor efficiency of the ratio of the refrigerating capacity in the helical-lobe compressor of Fig. 1.
The helical-lobe compressor 50 of present embodiment is made of with helical-lobe compressor the screw rod cooling, and this screw rod cooling is made of compressor section 17, motor part 18 and control gear 23 with helical-lobe compressor.Compressed refrigerant flows to compressor section 17 via motor part 18, is discharged to outside the compressor after compressor section 17 is compressed.Be certain running that makes the change in location of rotating speed and capacity control drive though carry out the helical-lobe compressor 50 of volume controlled in order to make pressure,, this pilot pressure is set to pressure arbitrarily.
Compressor section 17 has main casing 1, screw rotor 2, capacity control drive 11, bar 12, hydraulic piston 13, helical spring 14, discharges housing 21, roller bearing 6,7 and ball bearing 8 etc.
Main casing 1 is formed with inlet hole 9, tap hole 10 and exhaust port 19 etc.Inlet hole 9 is the parts that form to the suction passage of screw rotor 2, and tap hole 10 is the parts that form from the drain passageway of screw rotor 2 beginnings, and exhaust port 19 is the parts that form to the discharge stream of outside.Discharge housing 21 and be configured in the opposite side of motor of main casing 1, and be fixed on the main casing 1.
Screw rotor 2 is made of intermeshing a pair of male rotor 2A and a pair of female rotor (not shown go out), is housed in the pair of cylinders shape inner chamber (not shown go out).Be set at the roller bearing 6 on the main casing 1 and be arranged on the roller bearing 7 and ball bearing 8 supports of discharging on the housing 21 at the set axial region in the both sides of male rotor 2A.
Capacity control drive 11 is to make the part of suction refrigerant gas of the engaging piece that is inhaled into screw rotor 2 to the suction side bypass, is used to carry out the parts of volume controlled, is housed in movably along among the recess 1b of horizontal expansion.With corresponding by the motor speed of inverter 5 controls, control becomes the position of the such capacity control drive of peak efficiency 11.Then, a part that sucks refrigerant gas is compared to the volume controlled of suction side bypass with making a part of discharging gas to the volume controlled of discharging the side bypass, can be carried out volume controlled effectively.Hydraulic piston 13 is the parts that drive capacity control drive 11 by bar about 12, is housed in slidably along in the cylinder 15 of horizontal expansion.Helical spring 14 is configured in the volume controlled valve chamber side of cylinder 15, always applies the power that hydraulic piston 13 is pressed to the capacity control drive thruster.Constitute capacity control mechanism (capacitance control member) by capacity control drive 11, bar 12, hydraulic piston 13 and helical spring 14.
Motor part 18 has motor casing 16 and drive motor 22 etc., is configured to the driving force of motor part 18 is transmitted to compressor section 17.Motor casing 16 and main casing 1 end face be sealing and fixing each other, simultaneously, and internal communication each other.Be formed for sucking the suction port 20 of compressed refrigerant in the side of the opposite side of compressor section of motor casing 16.
Drive motor 22 is made of motor stator 3 and motor rotor 4, is configured in the motor casing 16.Motor stator 3 is installed in the inner peripheral surface of motor casing 16.Motor rotor 4 is fixed on the axial region of a side that is formed at male rotor 2A, and rotation freely is configured in the motor stator 3.Constitute by this, the driving force of drive motor 22 is passed to male rotor 2A.In addition, female rotor is driven by male rotor 2A.
Control gear 23 has the inverter 5 and the valve control device 26 that is used for the position of capacity control drive 11 is controlled that is used for drive motor 22 is carried out rotating speed control.
Inverter 5 and load are correspondingly controlled the speed of motor part 22.On control gear 23, connecting power supply, suction pressure sensor 24 and head pressure sensor 25.Suction pressure sensor 24 is the suction side pressure that detects compressor, the pressure of for example suction port 20 and the parts of exporting to control gear 23.Head pressure sensor 25 is the discharge side pressure that detects compressor, the pressure of for example exhaust port 20 and the parts of importing to control gear 23.
Helical-lobe compressor 50 is constituted as and loads correspondingly, independent or sharedly controls based on the rotating speed control member of inverter 5 with based on the capacitance control member of capacity control drive 11.In addition, helical-lobe compressor 50 is constituted as, to be set in the rotating speed side lower based on the best efficiency point that inverter 5 carries out under the situation of independent volume controlled than specified operation point, than the big zone of this best efficiency point rotating speed from rated speed to high rotating speed side, only control by inverter.Have again, helical-lobe compressor 50 is constituted as, and is when the running that requires smaller or equal to the rotary speed area of best efficiency point, corresponding with ability, shared based on inverter 5 the rotating speed control member and turn round based on the capacitance control member of capacity control drive 11, make the efficient maximum.
Certain is unusual even control device 26 produces at inverter 5, under the situation that the running of the motor that carries out based on inverter 5 can not continue, effective in order to make based on the volume controlled of capacity control drive 11, also on a crash basis motor 22 directly is attached to source power supply, proceeds so far before such volume controlled of carrying out and turn round based on capacity control drive 11.In view of the above, can improve the operating reliability of helical-lobe compressor 50.
In the helical-lobe compressor 50 that constitutes like this, to drive motor 22 supply capabilities, in view of the above, drive motor 22 has with the regulation rotating speed rotation based on inverter 5 again, compressor section 17 rotations by inverter 5.In view of the above, compressed refrigerant is inhaled into the inside of motor casing 16 by suction port 20, after having cooled off drive motor 22, be inhaled in the screw rotor 2 by inlet hole 9, after by screw rotor 2 compressions, be discharged to the discharge stream by tap hole 10, and then, be discharged to outside stream from exhaust port 19.
The freeze cycle that constitutes the screw rod cooling as shown in Figure 1, it constitutes, successively connecting screw rod compressor 50, condenser 27, expansion valve 28 and vaporizer 29 annularly.So the refrigeration agent of the High Temperature High Pressure of discharging from helical-lobe compressor 50 is condensed in the heat exchange of condenser 27 by the air that produces with fan 30, becomes the liquid refrigerant of cryogenic high pressure, and is fed into expansion valve 28.Then, the liquid refrigerant of the low-temp low-pressure that is depressurized at expansion valve 28 carries out heat exchange and evaporation at the refrigerant piping 29a of vaporizer 29 and the water of cold water pipe arrangement 29b, becomes the gas of low pressure, turns back to helical-lobe compressor 50.Then, the cold water of cold water pipe arrangement 29b cooling is used to refrigeration.
On the cold water pipe arrangement 29b of vaporizer 34, temperature transducer 35 is installed, is transfused to control gear 23 from the testing signal of the expression coolant water temperature of this temperature transducer 31.So, control gear 23 will be controlled inverter 5 and capacity control drive 11 based on the coolant water temperature of the testing signal that is transfused to as load side information, in view of the above, carries out the ability adjustment at load.
In the capacity control drive formula inverter helical-lobe compressor 50 of above-mentioned formation, be adjusted at when being input to control gear 23 at the ability of load from the signal that sucks pressure transducer 24 with from the signal of head pressure sensor 25, to be input to control gear 23 from the signal of temperature transducer 31, according to these signals, carry out the rotating speed control of the drive motor 22 that carries out based on inverter 5 and the positioning control of the capacity control drive 11 that carries out based on valve control device 26.
Should be as mentioned above at the ability adjustment of loading, undertaken by following manner, promptly, than the big zone of best efficiency point rotating speed under the independent volume controlled situation of carrying out based on inverter 5, only controlling from rated speed to high rotating speed side by inverter 5, at rotary speed area smaller or equal to best efficiency point, be to be undertaken by following manner, promptly, corresponding with ability, the shared rotating speed that carries out based on inverter 5 is controlled and based on the capacitance control that capacity control drive 11 carries out, is maximum so that make efficient.
Here, compare than (in the present embodiment specified 80% refrigerating capacity than) with the refrigerating capacity that becomes best efficiency point, refrigerating capacity than big zone in, shown in Fig. 2 (a), make capacity control drive 11 to axial motor one side shifting, make the refrigerant gas can bypass, come the rotating speed of controlling and driving motor 22 by inverter 5.In addition,, shown in Fig. 2 (b), make capacity control drive 11, make refrigerant gas, come the rotating speed of controlling and driving motor 22 simultaneously by inverter 5 to the suction side bypass to the opposite side shifting of axial motor at rotary speed area smaller or equal to best efficiency point.
One side is with reference to Fig. 3, and one side illustrates the full heat-insulating efficiency and the refrigerating capacity of relevant helical-lobe compressor 50.Fig. 3 represents full heat-insulating efficiency of the present invention in the drawings that transverse axis is represented the refrigerating capacity ratio.The line of single-point among the figure is by the efficiency curve based on the Spin Control of inverter, and dotted line is to be illustrated in to drive by inverter to change rotating speed, and is fixed in rotating speed separately, carries out simultaneously based on the efficiency curve under the situation of the volume controlled of capacity control drive.In addition, among the figure solid line be expression carry out will carry out based on inverter rotating speed control and based on the volume controlled combination that capacity control drive carries out, reach the efficiency curve under the situation of the such control of peak efficiency.
As can be known from Fig. 3, driving for inverter under the situation of helical-lobe compressor 50, when comparing smaller or equal to 80% refrigerating capacity, can improve compressor efficiency, particularly at refrigerating capacity than low zone, can significantly improve compressor efficiency, described inverter drive helical-lobe compressor 50 shared in the present embodiment the control of carrying out based on inverter 5 and the control of carrying out based on capacity control drive 11.
According to present embodiment, can access a kind of helical-lobe compressor as screw rod cooling usefulness, can efficient good running.

Claims (6)

1. helical-lobe compressor, it is the helical-lobe compressor of screw rod cooling usefulness, have a pair of screw rotor and take in its housing, the capacity control drive that can change volume ratio, the motor that drives above-mentioned screw rotor and the inverter that can change, it is characterized in that the rotating speed of this motor
Corresponding with load, independent or sharedly control based on the rotating speed control member of above-mentioned inverter with based on the capacitance control member of above-mentioned capacity control drive, simultaneously, best efficiency point under the independent volume controlled situation that will carry out based on above-mentioned inverter is set in rotating speed one side lower than specified operation point, than the big zone of this best efficiency point rotating speed from rated speed to high rotating speed side, only control by above-mentioned inverter.
2. helical-lobe compressor as claimed in claim 1, it is characterized in that, when the running that requires smaller or equal to the rotary speed area of above-mentioned best efficiency point, corresponding with ability, shared based on above-mentioned inverter the rotating speed control member and turn round based on the capacitance control member of above-mentioned capacity control drive, make the efficient maximum.
3. helical-lobe compressor as claimed in claim 1 is characterized in that, above-mentioned capacity control drive can change the compression initial position that is arranged on above-mentioned housing.
4. helical-lobe compressor as claimed in claim 1 is characterized in that, will based on above-mentioned inverter carry out best efficiency point under the situation of independent volume controlled be set in specified refrigerating capacity 80% near.
5. helical-lobe compressor as claimed in claim 2 is characterized in that, and is corresponding with load with the suction side pressure and the discharge side pressure of above-mentioned a pair of screw rotor, according to the rotating speed of said motor, the position of above-mentioned capacity control drive controlled.
6. helical-lobe compressor as claimed in claim 1, it is characterized in that, produce unusual at above-mentioned inverter, under the situation that the running of the said motor of carrying out based on this inverter can not continue, on a crash basis this motor directly is attached to source power supply, proceeds so far before such volume controlled running based on above-mentioned capacity control drive.
CNB2007101384742A 2006-08-10 2007-08-08 Helical-lobe compressor Active CN100547244C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006218438A JP4949768B2 (en) 2006-08-10 2006-08-10 Screw compressor
JP2006218438 2006-08-10

Publications (2)

Publication Number Publication Date
CN101122290A true CN101122290A (en) 2008-02-13
CN100547244C CN100547244C (en) 2009-10-07

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US (1) US20080038127A1 (en)
JP (1) JP4949768B2 (en)
CN (1) CN100547244C (en)

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CN103486028A (en) * 2012-06-08 2014-01-01 株式会社日立产机系统 Oil-free helical-lobe compressor
CN104912805A (en) * 2015-06-30 2015-09-16 特灵空调系统(中国)有限公司 Controlling method of helical-lobe compressor
CN105579709A (en) * 2013-10-01 2016-05-11 特灵国际有限公司 Rotary compressors with variable speed and volume control
CN107514362A (en) * 2017-08-30 2017-12-26 重庆美的通用制冷设备有限公司 Inverter screw compressor and its energy adjustment control method and air-conditioning system
CN108332464A (en) * 2018-02-09 2018-07-27 珠海格力电器股份有限公司 Compressor control method, control device and air-conditioner set

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JP5358608B2 (en) * 2011-03-30 2013-12-04 日立アプライアンス株式会社 Screw compressor and chiller unit using the same
EP3118458B1 (en) * 2015-07-15 2017-08-30 ABB Technology Oy Method and apparatus in connection with a screw compressor
RU2723469C2 (en) * 2015-08-11 2020-06-11 Кэрриер Корпорейшн Compressor, steam compression plant and methods of their operation and assembly
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CN103486028B (en) * 2012-06-08 2016-05-18 株式会社日立产机系统 Oil free screw compressor
CN105579709A (en) * 2013-10-01 2016-05-11 特灵国际有限公司 Rotary compressors with variable speed and volume control
CN104912805A (en) * 2015-06-30 2015-09-16 特灵空调系统(中国)有限公司 Controlling method of helical-lobe compressor
CN107514362A (en) * 2017-08-30 2017-12-26 重庆美的通用制冷设备有限公司 Inverter screw compressor and its energy adjustment control method and air-conditioning system
CN107514362B (en) * 2017-08-30 2020-02-04 重庆美的通用制冷设备有限公司 Variable frequency screw compressor, energy regulation control method thereof and air conditioning system
CN108332464A (en) * 2018-02-09 2018-07-27 珠海格力电器股份有限公司 Compressor control method, control device and air-conditioner set

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