CN105864045A - Constant-power variable-frequency screw compressor and control method thereof - Google Patents
Constant-power variable-frequency screw compressor and control method thereof Download PDFInfo
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- CN105864045A CN105864045A CN201610202420.7A CN201610202420A CN105864045A CN 105864045 A CN105864045 A CN 105864045A CN 201610202420 A CN201610202420 A CN 201610202420A CN 105864045 A CN105864045 A CN 105864045A
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- compressor
- expulsion
- pressure
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- rotating speed
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Classifications
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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
- 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
- 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
- F04C2270/58—Valve parameters
- F04C2270/585—Controlled or regulated
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a constant-power variable-frequency screw compressor and a control method thereof. The screw compressor comprises a control unit, an exhaust pressure sensing unit and a rotational speed control unit. The control unit is connected with the exhaust pressure sensing unit and the rotational speed control unit. The exhaust pressure sensing unit is used for sensing the exhaust pressure of the screw compressor and transmitting sensed data to the control unit. The control unit is used for enabling a unit motor of the compressor to maintain full-load constant-power output according to the sensed data of the exhaust pressure sensing unit, calculating the rotational speed of the compressor and transmitting the rotational speed to the rotational speed control unit. The rotational speed control unit is used for receiving the compressor rotational speed transmitted by the control unit and controlling the rotational speed of the compressor based on the received rotational speed. According to the constant-power variable-frequency screw compressor and the control method thereof provided by the invention, the requirements of users for variable exhaust pressure and variable gas flow can be met, and the application range is wide; and the motor operates under a full-load working condition all the time, the motor efficiency is optimal, and the energy efficiency ratio is good.
Description
Technical field
The invention belongs to Compressor Technology field, relate to a kind of helical-lobe compressor, particularly relate to a kind of invariable power frequency conversion screw compression
Machine；Meanwhile, the invention still further relates to the control method of a kind of invariable power inverter screw compressor.
Background technology
Inverter screw compressor generally uses the rotating speed of frequency converter regulation compressor to obtain different capacities, along with the liter of rotating speed
The capacity of high compressor is continuously increased.For helical-lobe compressor, pressure at expulsion one timing, capacity and helical-lobe compressor shaft work
It is substantially linear relationship with rotating speed.
Inverter screw compressor common control logic is to control helical-lobe compressor rotation speed change, it is thus achieved that different capacities, this
Control logic and can meet user's demand to capacities different under single pressure at expulsion, can not have for becoming the demand of pressure at expulsion
Effect meets, and during sub-load, electric efficiency declines substantially simultaneously, efficiency ratio.
In view of this, nowadays in the urgent need to designing a kind of new helical-lobe compressor, in order to overcome that existing helical-lobe compressor exists is upper
State defect.
Summary of the invention
The technical problem to be solved is: provides a kind of invariable power inverter screw compressor, can meet user and become exhaust pressure
Power and change tolerance demand, wide accommodation, motor operates in operating mode at full capacity always simultaneously, and electric efficiency is optimum, and Energy Efficiency Ratio is good.
Additionally, the present invention also provides for the control method of a kind of invariable power inverter screw compressor, can meet user become pressure at expulsion and
Becoming tolerance demand, wide accommodation, motor operates in operating mode at full capacity always simultaneously, and electric efficiency is optimum, and Energy Efficiency Ratio is good.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of invariable power inverter screw compressor, described helical-lobe compressor includes: control unit, pressure at expulsion sensing unit, turn
Speed control unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively；
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to control unit by described pressure at expulsion sensing unit；
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent merit at full capacity
Rate exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The different pressure at expulsion of helical-lobe compressor is not corresponding to
Same rotating speed, under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；High helical-lobe compressor under low pressure at expulsion
Rotating speed raises, and tolerance increases, and meets user's difference pressure at expulsion and different capacity demand；
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
A kind of invariable power inverter screw compressor, described helical-lobe compressor includes: control unit, pressure at expulsion sensing unit, turn
Speed control unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively；
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to control unit by described pressure at expulsion sensing unit；
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent merit at full capacity
Rate exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit；
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
As a preferred embodiment of the present invention, PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2..., τiTable
Show the compressor operating operating mode in different pressures at expulsion.
As a preferred embodiment of the present invention, the different pressure at expulsion of helical-lobe compressor is corresponding to different rotating speeds, high exhaust pressure
Under power, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；
Under low pressure at expulsion, the rotating speed of high helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different exhaust
Amount demand.
The control method of a kind of invariable power inverter screw compressor, described control method comprises the steps:
The data of sensing are sent to control unit by step S1, the pressure at expulsion of pressure at expulsion sensing units sense helical-lobe compressor；
Step S2, control unit, according to the sensed data of pressure at expulsion sensing unit, make the unit motor of compressor keep at full capacity
Constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein:
τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The different pressure at expulsion of helical-lobe compressor corresponds to
Different rotating speeds, under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；High helical-lobe compressor under low pressure at expulsion
Rotating speed raise, tolerance increases, and meets user's difference pressure at expulsion and different capacity demand；
The compressor rotary speed that step S3, rotary speed controling unit reception control unit send, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
The control method of a kind of invariable power inverter screw compressor, described control method comprises the steps:
The data of sensing are sent to control unit by step S1, the pressure at expulsion of pressure at expulsion sensing units sense helical-lobe compressor；
Step S2, control unit, according to the sensed data of pressure at expulsion sensing unit, make the unit motor of compressor keep at full capacity
Constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；
The compressor rotary speed that step S3, rotary speed controling unit reception control unit send, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
As a preferred embodiment of the present invention, in step S2, PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2...,
τiRepresent the compressor operating operating mode in different pressures at expulsion.
As a preferred embodiment of the present invention, in step S2, the different pressure at expulsion of helical-lobe compressor corresponding to different rotating speeds,
Under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；
Under low pressure at expulsion, the rotating speed of high helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different exhaust
Amount demand.
The beneficial effects of the present invention is: the invariable power inverter screw compressor of present invention proposition and control method thereof, use can be met
Family becomes pressure at expulsion and becomes tolerance demand, wide accommodation, and motor operates in operating mode at full capacity always simultaneously, and electric efficiency is optimum,
Energy Efficiency Ratio is good.
Accompanying drawing explanation
Fig. 1 is the flow chart of invariable power inverter screw compressor control method of the present invention.
Detailed description of the invention
Describe the preferred embodiments of the present invention below in conjunction with the accompanying drawings in detail.
Embodiment one
Referring to Fig. 1, present invention is disclosed a kind of invariable power inverter screw compressor, described helical-lobe compressor includes: control unit,
Pressure at expulsion sensing unit, rotary speed controling unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively.
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to control unit by described pressure at expulsion sensing unit.
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent merit at full capacity
Rate exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The different pressure at expulsion of helical-lobe compressor is not corresponding to
Same rotating speed, under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；High helical-lobe compressor under low pressure at expulsion
Rotating speed raises, and tolerance increases, and meets user's difference pressure at expulsion and different capacity demand.
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
Additionally, the present invention also provides for the control method of a kind of invariable power inverter screw compressor, described control method includes walking as follows
Rapid:
The data of sensing are sent to controlling list by the pressure at expulsion of [step S1] pressure at expulsion sensing units sense helical-lobe compressor
Unit；
[step S2] control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep full negative
Lotus constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni, its
In: τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The pressure at expulsion pair that helical-lobe compressor is different
Should reduce by the rotating speed of helical-lobe compressor under different rotating speeds, high pressure at expulsion, tolerance reduces；High screw rod pressure under low pressure at expulsion
The rotating speed of contracting machine raises, and tolerance increases, and meets user's difference pressure at expulsion and different capacity demand；
The compressor rotary speed that [step S3] rotary speed controling unit reception control unit sends, and with the rotating speed that receives for according to control
The rotating speed of compressor.
Embodiment two
A kind of invariable power inverter screw compressor, described helical-lobe compressor includes: control unit, pressure at expulsion sensing unit, turn
Speed control unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively.
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to control unit by described pressure at expulsion sensing unit.
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent merit at full capacity
Rate exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit.
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
The present invention discloses the control method of a kind of invariable power inverter screw compressor, and described control method comprises the steps:
The data of sensing are sent to control unit by step S1, the pressure at expulsion of pressure at expulsion sensing units sense helical-lobe compressor；
Step S2, control unit, according to the sensed data of pressure at expulsion sensing unit, make the unit motor of compressor keep at full capacity
Constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；
The compressor rotary speed that step S3, rotary speed controling unit reception control unit send, and control pressure with the rotating speed received for foundation
The rotating speed of contracting machine.
In sum, the invariable power inverter screw compressor of present invention proposition and control method thereof, user can be met and become pressure at expulsion
And becoming tolerance demand, wide accommodation, motor operates in operating mode at full capacity always simultaneously, and electric efficiency is optimum, and Energy Efficiency Ratio is good.
Here description of the invention and application is illustrative, is not wishing to limit the scope of the invention in above-described embodiment.This
In the deformation of disclosed embodiment and change be possible, for those skilled in the art, embodiment is replaced
Change and the various parts of equivalence are known.It should be appreciated by the person skilled in the art that without departing from the spirit of the present invention or this
In the case of matter feature, the present invention can in other forms, structure, layout, ratio, and with other assembly, material and portion
Part realizes.In the case of without departing from scope and spirit of the present invention, embodiments disclosed herein can be carried out other deformation
And change.
Claims (8)
1. an invariable power inverter screw compressor, it is characterised in that described helical-lobe compressor includes: control unit, pressure at expulsion sense
Answering unit, rotary speed controling unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively；
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to controlling list by described pressure at expulsion sensing unit
Unit；
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent at full capacity
Power exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni, its
In: τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The exhaust pressure that helical-lobe compressor is different
Power is corresponding to different rotating speeds, and under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；Height under low pressure at expulsion
The rotating speed of helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different capacity demand；
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and with the rotating speed that receives for according to control
The rotating speed of compressor.
2. an invariable power inverter screw compressor, it is characterised in that described helical-lobe compressor includes: control unit, pressure at expulsion sense
Answering unit, rotary speed controling unit, control unit connects pressure at expulsion sensing unit, rotary speed controling unit respectively；
The data of sensing, in order to sense the pressure at expulsion of helical-lobe compressor, are sent to controlling list by described pressure at expulsion sensing unit
Unit；
Described control unit, according to the sensed data of pressure at expulsion sensing unit, makes the unit motor of compressor keep permanent at full capacity
Power exports, and calculates the rotating speed of compressor, sends to rotary speed controling unit；
The compressor rotary speed that described rotary speed controling unit sends in order to reception control unit, and with the rotating speed that receives for according to control
The rotating speed of compressor.
Invariable power inverter screw compressor the most according to claim 2, it is characterised in that:
PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2..., τiRepresent that compressor operating is vented in difference
The operating mode of pressure.
Invariable power inverter screw compressor the most according to claim 2, it is characterised in that:
The different pressure at expulsion of helical-lobe compressor corresponding to different rotating speeds, the rotating speed fall of helical-lobe compressor under high pressure at expulsion
Low, tolerance reduces；
Under low pressure at expulsion, the rotating speed of high helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different row
Tolerance demand.
5. the control method of an invariable power inverter screw compressor, it is characterised in that described control method comprises the steps:
The data of sensing are sent to controlling by step S1, the pressure at expulsion of pressure at expulsion sensing units sense helical-lobe compressor
Unit；
Step S2, control unit, according to the sensed data of pressure at expulsion sensing unit, make the unit motor of compressor keep full
Load constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；PSpecified=τ1*n1=τ2*n2=...=τi* ni,
Wherein: τ1, τ2..., τiRepresent the compressor operating operating mode in different pressures at expulsion；The exhaust that helical-lobe compressor is different
Pressure is corresponding to different rotating speeds, and under high pressure at expulsion, the rotating speed of helical-lobe compressor reduces, and tolerance reduces；Under low pressure at expulsion
The rotating speed of high helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different capacity demand；
The compressor rotary speed that step S3, rotary speed controling unit reception control unit send, and control with the rotating speed received for foundation
The rotating speed of compressor processed.
6. the control method of an invariable power inverter screw compressor, it is characterised in that described control method comprises the steps:
The data of sensing are sent to controlling by step S1, the pressure at expulsion of pressure at expulsion sensing units sense helical-lobe compressor
Unit；
Step S2, control unit, according to the sensed data of pressure at expulsion sensing unit, make the unit motor of compressor keep full
Load constant power output, calculates the rotating speed of compressor, sends to rotary speed controling unit；
The compressor rotary speed that step S3, rotary speed controling unit reception control unit send, and control with the rotating speed received for foundation
The rotating speed of compressor processed.
Control method the most according to claim 6, it is characterised in that:
In step S2, PSpecified=τ1*n1=τ2*n2=...=τi* ni, wherein: τ1, τ2..., τiRepresent compressor operating
Operating mode in different pressures at expulsion.
Control method the most according to claim 6, it is characterised in that:
In step S2, the different pressure at expulsion of helical-lobe compressor is corresponding to different rotating speeds, screw compression under high pressure at expulsion
The rotating speed of machine reduces, and tolerance reduces；
Under low pressure at expulsion, the rotating speed of high helical-lobe compressor raises, and tolerance increases, and meets user's difference pressure at expulsion and different row
Tolerance demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202420.7A CN105864045B (en) | 2016-04-01 | 2016-04-01 | Invariable power inverter screw compressor and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202420.7A CN105864045B (en) | 2016-04-01 | 2016-04-01 | Invariable power inverter screw compressor and its control method |
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| Publication Number | Publication Date |
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| CN105864045A true CN105864045A (en) | 2016-08-17 |
| CN105864045B CN105864045B (en) | 2018-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236622A (en) * | 2018-09-21 | 2019-01-18 | 宁波奥克斯电气股份有限公司 | A kind of compressor frequency control method, device and air conditioner |
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| CN101451523A (en) * | 2008-12-26 | 2009-06-10 | 西安交通大学 | Frequency conversion control method of compressor unit for natural gas vehicle refueling mother station |
| CN201297251Y (en) * | 2008-11-13 | 2009-08-26 | 无锡五洋赛德压缩机有限公司 | Compressor using intelligent controller for controlling running state |
| CN102828942A (en) * | 2011-06-16 | 2012-12-19 | 中联重科股份有限公司 | Constant power control device and method of variable pump and concrete pumping device |
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| JP2003003975A (en) * | 2001-06-25 | 2003-01-08 | Kobe Steel Ltd | Control method of screw compressor |
| CN2809263Y (en) * | 2005-07-29 | 2006-08-23 | 自贡通达机器制造有限公司 | Hydraulic piston type natural gas compressor |
| CN201297251Y (en) * | 2008-11-13 | 2009-08-26 | 无锡五洋赛德压缩机有限公司 | Compressor using intelligent controller for controlling running state |
| CN101451523A (en) * | 2008-12-26 | 2009-06-10 | 西安交通大学 | Frequency conversion control method of compressor unit for natural gas vehicle refueling mother station |
| CN102828942A (en) * | 2011-06-16 | 2012-12-19 | 中联重科股份有限公司 | Constant power control device and method of variable pump and concrete pumping device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109236622A (en) * | 2018-09-21 | 2019-01-18 | 宁波奥克斯电气股份有限公司 | A kind of compressor frequency control method, device and air conditioner |
| CN109236622B (en) * | 2018-09-21 | 2020-03-13 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
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| CN105864045B (en) | 2018-08-21 |
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