CN1291684A - Frequency-changing pressure stabilizing system for air compressor - Google Patents
Frequency-changing pressure stabilizing system for air compressor Download PDFInfo
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- CN1291684A CN1291684A CN 99122202 CN99122202A CN1291684A CN 1291684 A CN1291684 A CN 1291684A CN 99122202 CN99122202 CN 99122202 CN 99122202 A CN99122202 A CN 99122202A CN 1291684 A CN1291684 A CN 1291684A
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- air compressor
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- pressure
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Abstract
A frequency-converting pressure stabilizing system for air compressor is composed of a pressure sensor at output of air compressor for monitoring output pressure and a frequency converter to drive the air compressor. Said frequency converter consists of signal processing unit and CPU unit. The signal processing unit can convert the pressure value from sensor to digital signal. Said CPU unit can compare it with the pressure setting, calculate and control the air compressor.
Description
The frequency-changing pressure stabilizing system of the relevant a kind of air compressor of the present invention, especially the motor speed that refers to a kind of lasting calculation, comparison and stable control air compressor, and can make delivery pressure stable, and the power supply of automatic cut-off motor when reaching setup pressure value reaches the frequency-changing pressure stabilizing system of power saving effect really.
Air compressor is the power equipment that factory even general hotel owner use always, owing to involve power and electricity consumption, must monitor the pressure condition of air compressor at any time, and it is turned round stablize under the constant voltage, can guarantee that just safety and stablization export pressurized air.
Yet general air compressor is to push air merely to reach required pressure, and is the fixed rotating speed supply air compressor running that utilizes motor, thereby and can't adjust the delivery pressure value.When reaching demand working pressure value, the unnecessary gas that exceeds will disengage, and forms the waste of unnecessary work in addition.If when having additional timer, can no longer power at the time internal cutting off power supply of setting and turn round to air compressor, in case when not reaching required force value, promptly must restart this air compressor, could start this air compressor because of adopting the restriction of three-phase voltage and motor constant speed drive so need expend sizable electric power this moment, and easily cause the internal works wearing and tearing, delivery pressure is also unstable, shortens the working life of air compressor relatively.Otherwise if can't reach required working pressure value the time always, then air compressor must can't be had a rest in continuous running, not only expends considerable electric power, also shortens the working life of air compressor.
Main purpose of the present invention provides a kind of frequency-changing pressure stabilizing system of air compressor, it is to utilize a frequency variator to drive air compressor to turn round under constant voltage, and when air compressor delivery pressure value surpasses setting value, can close the air compressor running by the central processing unit controls that includes.
The present invention is achieved in that a kind of frequency-changing pressure stabilizing system of air compressor, it is the actual delivery pressure value that connects pressure transducer confession monitoring air compressor at the output terminal of air compressor, it is characterized in that: a frequency variator is set drives this air compressor running, the input end of this frequency variator is connected with aforesaid pressure transducer, wherein frequency variator comprises a signal processing unit and a central processing unit, this signal processing unit will be converted to correct digital signal from the force value of pressure transducer and give central processing unit, for central processing unit and setting value comparison, computing and control air compressor and under constant voltage, turn round; And when air compressor delivery pressure value surpasses setting value, then close the air compressor running by central processing unit controls.
Wherein, this signal processing unit comprises a filter and crosses device, correcting unit and analog/digital converter.
Wherein, this central processing unit comprises one and shows and setting device, in order to show force value and input setting value.
Characteristics of the present invention are to utilize a frequency variator to drive air compressor to turn round under constant voltage, and when air compressor delivery pressure value surpasses setting value, close the air compressor running by the central processing unit controls that includes, with steady running and the constant voltage output of keeping air compressor.
Below in conjunction with embodiment, and conjunction with figs., purpose of the present invention, feature and effect are described in detail:
Fig. 1 is a structure Block Diagram of the present invention.
Fig. 2 is a workflow diagram of the present invention.
See also Fig. 1 and Fig. 2, be respectively structure Block Diagram of the present invention and workflow diagram of the present invention.As shown in the figure: the frequency-changing pressure stabilizing system of air compressor of the present invention mainly is that the frequency variator 3 by a Chinese displaying is connected with air compressor 1, with the control operational situation, it is maintained pressure constant state under turn round; Output terminal at air compressor 1 connects a pressure transducer 2 in addition, actual delivery pressure value in order to monitoring air compressor 1, the force value of its monitoring gained will be sent to frequency variator 3, and whether the setting value comparison inner with it closes in standard with the force value that differentiation air compressor 1 is exported.Wherein, this frequency variator 3 comprises by signal processing unit 4 and central processing unit 5 and is formed, and central processing unit 5 and connect and show and setting device 51, in order to force value and the input setting value that shows monitoring.
Above-mentioned this signal processing unit 4 comprises a wave filter 41, correcting unit 42 and analog/digital converter 43, use the force value analogue signal that to be monitored from pressure transducer 2, be converted to correct digital signal through actions such as filtering, current limliting, error amount correction, digital translation and supply with central processing unit 5.This central processing unit 5 has multinomial functions such as setting value storage, force value comparison, computing and VFC, it can be in advance by the setting value that shows and delivery pressure is scheduled in setup unit 51 input storages, for comparing with the force value digital signal of signal processing unit 4, and carry out computing drives air compressor 1 with modulation frequency according to comparison result, and then the suitable rotating speed of control motor 11, make the delivery pressure value stabilization of air compressor 1, reach running under the pressure constant state.
And this demonstration and setup unit 51 can provide the effect that shows with the input setting, and it cooperates suitable programming can specifically show the force value that pressure transducer 2 is monitored, for range estimation monitoring understanding; And the setting value of input service demand pressure can be provided, for and central processing unit 5 stores, comparison.And aforementioned demonstration and input set-up function can utilize institutes such as display device and keyboard to finish, and also can directly adopt touch control screen to finish.
Overall structure by the invention described above, can monitor out the actual delivery pressure value of air compressor 1 by pressure transducer 2, through frequency variator 3 and default setting value compare, computing, its difference is tuned as the motor 11 that appropriate frequency drives air compressor 1, and then the suitable rotating speed of variable ratio frequency changer control carrying out motor 11, make the delivery pressure value stabilization of air compressor 1, reach running under the pressure constant state.
In addition, the actual delivery pressure value of monitoring out air compressor 1 when pressure transducer 2 is through comparison, as when being higher than default setting value, the central processing unit 5 in the frequency variator 3 will be sent brake signal control shuts down the motor 11 of air compressor 1.Otherwise, when the actual delivery pressure value of air compressor 1 through comparison, when being lower than default setting value again, frequency variator 3 will send suitable modulation drive signal control by central processing unit 5 turns round the motor 11 of air compressor 1 again, and keeps the normal circulation running of air compressor 1.
By the particular design of the invention described above, the characteristics that are constructed as follows: 1, can by frequency converter 3 with The time adjust the setting value of work requirements pressure, be suitable for more specification. 2, utilize turning to of control motor 11 Speed reaches the output pressure value stabilization. 3, utilize frequency converter 3 to reach constant voltage output effect, relatively increase The stability of equipment, the service life of prolongation air compressor machine. When 4, arriving the work requirements pressure set points, Motor 11 will shut down automatically, relatively have electricity saving function, avoid energy waste. 5, utilize change Frequently device 3 restarts motor 11 runnings of air compressor machine 1, and it is smooth and easy that air compressor machine 1 is started.
Claims (3)
1, a kind of frequency-changing pressure stabilizing system of air compressor, it is the actual delivery pressure value that connects pressure transducer confession monitoring air compressor at the output terminal of air compressor, it is characterized in that: a frequency variator is set drives this air compressor running, the input end of this frequency variator is connected with aforesaid pressure transducer, wherein frequency variator comprises a signal processing unit and a central processing unit, this signal processing unit will be converted to correct digital signal from the force value of pressure transducer and give central processing unit, for central processing unit and setting value comparison, computing and control air compressor and under constant voltage, turn round; And when air compressor delivery pressure value surpasses setting value, then close the air compressor running by central processing unit controls.
2, the frequency-changing pressure stabilizing system of air compressor as claimed in claim 1 is characterized in that: wherein, this signal processing unit comprises a filter and crosses device, correcting unit and analog/digital converter.
3, the frequency-changing pressure stabilizing system of air compressor as claimed in claim 1.It is characterized in that: wherein, this central processing unit comprises one and shows and setting device, in order to show force value and input setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122202 CN1291684A (en) | 1999-10-12 | 1999-10-12 | Frequency-changing pressure stabilizing system for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99122202 CN1291684A (en) | 1999-10-12 | 1999-10-12 | Frequency-changing pressure stabilizing system for air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1291684A true CN1291684A (en) | 2001-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99122202 Pending CN1291684A (en) | 1999-10-12 | 1999-10-12 | Frequency-changing pressure stabilizing system for air compressor |
Country Status (1)
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| CN (1) | CN1291684A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422557C (en) * | 2006-04-04 | 2008-10-01 | 联塑(杭州)机械有限公司 | Control method for energy saving of hydraulic machinery or raising prodn. efficiency |
| CN103527461A (en) * | 2012-07-06 | 2014-01-22 | 博世力士乐(西安)电子传动与控制有限公司 | Operational control system of air compressor and operational control method of air compressor |
| CN102265035B (en) * | 2008-12-23 | 2015-05-06 | 凯撒空压机欧洲股份公司 | Method for controlling compressor installation |
| US11465085B2 (en) | 2019-03-19 | 2022-10-11 | Lg Electronics Inc. | Air purifying system |
| US11497372B2 (en) | 2019-03-19 | 2022-11-15 | Lg Electronics Inc. | Air purifying system and control method for the air purifying system |
| US11739960B2 (en) | 2019-03-19 | 2023-08-29 | Lg Electronics Inc. | Air purifier and air purifying system |
-
1999
- 1999-10-12 CN CN 99122202 patent/CN1291684A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100422557C (en) * | 2006-04-04 | 2008-10-01 | 联塑(杭州)机械有限公司 | Control method for energy saving of hydraulic machinery or raising prodn. efficiency |
| CN102265035B (en) * | 2008-12-23 | 2015-05-06 | 凯撒空压机欧洲股份公司 | Method for controlling compressor installation |
| US11162492B2 (en) | 2008-12-23 | 2021-11-02 | Kaeser Kompressoren Se | Method for controlling a compressor installation |
| CN103527461A (en) * | 2012-07-06 | 2014-01-22 | 博世力士乐(西安)电子传动与控制有限公司 | Operational control system of air compressor and operational control method of air compressor |
| US11465085B2 (en) | 2019-03-19 | 2022-10-11 | Lg Electronics Inc. | Air purifying system |
| US11497372B2 (en) | 2019-03-19 | 2022-11-15 | Lg Electronics Inc. | Air purifying system and control method for the air purifying system |
| US11739960B2 (en) | 2019-03-19 | 2023-08-29 | Lg Electronics Inc. | Air purifier and air purifying system |
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