CN204476699U - A kind of piston compressor frequency conversion cooling system based on PID - Google Patents

A kind of piston compressor frequency conversion cooling system based on PID Download PDF

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Publication number
CN204476699U
CN204476699U CN201520058475.6U CN201520058475U CN204476699U CN 204476699 U CN204476699 U CN 204476699U CN 201520058475 U CN201520058475 U CN 201520058475U CN 204476699 U CN204476699 U CN 204476699U
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CN
China
Prior art keywords
plc
fan electromotor
cooling system
system based
pid
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.)
Expired - Fee Related
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CN201520058475.6U
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Chinese (zh)
Inventor
万腾
雷军
朱亚雄
张田
谭锐
胡葵
唐超
戴娜
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WUHAN QIDAKANG ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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WUHAN QIDAKANG ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Priority to CN201520058475.6U priority Critical patent/CN204476699U/en
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a kind of piston compressor frequency conversion cooling system based on PID.Comprise: programmable logic controller (PLC) PLC, human-computer interaction device HMI, fan electromotor M, frequency variator and the temperature transmitter for responding to fan electromotor hydraulic fluid temperature, wherein: human-computer interaction device HMI, temperature transmitter, frequency variator are connected with programmable logic controller (PLC) PLC; The power input of described frequency variator is connected with power supply with total lock switch OP1 by selector switch KM1, and its output terminal is opened by selection and sent KM3 to be connected with fan electromotor; Described fan electromotor is connected with power supply with total lock switch OP1 by selector switch KM2.Therefore, the utility model tool has the following advantages: (1) keeps fan electromotor lubricating oil temperature to be stabilized in setting range, prevents fan electromotor from occurring too high or too low for temperature; (2) variable frequency starting extends the working life of motor; (3) power frequency operation can be automatically switched to, thus the reliability and stability of the system of guarantee.

Description

A kind of piston compressor frequency conversion cooling system based on PID
Technical field
The utility model relates to a kind of frequency conversion cooling system, belongs to compressor variable frequency control system field, is specifically related to a kind of piston compressor frequency conversion cooling system based on PID.
Background technique
Due to compressed natural gas acting, produce heat, current compressor cooling system mainly contains: the cooling of air-cooled, cooling liquid and combination cooling etc. are several, wherein air cooling way is widely used due to economic and practical, but because air cooling effect affects larger by weather temperature, easily there is situation too high or too low for temperature with fan electromotor during power frequency operation, when changing according to the season, need human intervention.
Model utility content
The air cooling effect that the utility model mainly solves existing for prior art affects comparatively large by weather temperature, easily occur technical problem too high or too low for temperature, provide a kind of piston compressor frequency conversion cooling system based on PID during power frequency operation.This system adopts closed loop PID control technology, thus keeps fan electromotor lubricating oil temperature to be stabilized in setting range, prevents fan electromotor from occurring too high or too low for temperature; And adopt variable frequency starting, effectively decrease the impact of instantaneous large-current to cooling system, extend the working life of motor; Meanwhile, when frequency variator breaks down, also can automatically switch to power frequency operation, thus the reliability and stability of the system of guarantee.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
A kind of piston compressor frequency conversion cooling system based on PID, comprise: programmable logic controller (PLC) PLC, human-computer interaction device HMI, fan electromotor M, frequency variator and the temperature transmitter for responding to fan electromotor hydraulic fluid temperature, wherein: human-computer interaction device HMI, temperature transmitter, frequency variator are connected with programmable logic controller (PLC) PLC; The power input of described frequency variator is connected with power supply with total lock switch OP1 by selector switch KM1, and its output terminal is opened by selection and sent KM3 to be connected with fan electromotor; Described fan electromotor is connected with power supply with total lock switch OP1 by selector switch KM2.
Optimize, above-mentioned a kind of piston compressor frequency conversion cooling system based on PID, is communicated by RS485 serial ports between described frequency variator with programmable logic controller (PLC) PLC.
Optimize, above-mentioned a kind of piston compressor frequency conversion cooling system based on PID, described human-computer interaction device HMI is communicated by RS485 serial ports with between programmable logic controller (PLC) PLC.
Optimize, above-mentioned a kind of piston compressor frequency conversion cooling system based on PID, the programmable logic controller (PLC) PLC of described PLC to be the model of SIEMENS be CPU224XP.
Optimize, above-mentioned a kind of piston compressor frequency conversion cooling system based on PID, described human-computer interaction device is the smart700 touch screen of SIEMENS.
Therefore, the utility model tool has the following advantages: (1) system adopts closed loop PID control technology, thus keeps fan electromotor lubricating oil temperature to be stabilized in setting range, prevents fan electromotor from occurring too high or too low for temperature; (2) variable frequency starting effectively decreases the impact to cooling system, extends the working life of motor; (3) when frequency variator breaks down, power frequency operation can be automatically switched to, thus the reliability and stability of the system of guarantee.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is utility model works principle schematic.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
As shown in Figure 1, a kind of piston compressor frequency conversion cooling system based on PID, comprise: programmable logic controller (PLC) PLC, human-computer interaction device HMI, fan electromotor M, frequency variator and the temperature transmitter for responding to fan electromotor hydraulic fluid temperature, wherein: human-computer interaction device HMI, temperature transmitter, frequency variator are connected with programmable logic controller (PLC) PLC; The power input of described frequency variator is connected with power supply with total lock switch OP1 by selector switch KM1, and its output terminal is opened by selection and sent KM3 to be connected with fan electromotor; Described fan electromotor is connected with power supply with total lock switch OP1 by selector switch KM2.
Programmable logic controller (PLC) PLC selects Siemens CPU224XP, and human-computer interaction device is the smart700 touch screen of SIEMENS.CPU224XP, has two RS485 communication ports, and wherein PORT1 and smart700 connects, and PORT0 is connected with frequency variator, and 4-20mA temperature transmitter connects PLC analog input.
Programmable logic controller (PLC) PLC control smart700 shows the real-time frequency of frequency conversion, and can manual tune.With STEP7-MICROWIN software transfer Siemens modbus library file, the PORT0 of PLC is set to main website, frequency variator is set to slave station, arranges the baud rate of PLC, station address in modbus subroutine, parity check, the register address of Frequency Converter Control status word, in the enterprising line parameter setting of Frequency Converter Control panel, frequency variator Starting mode, frequency setting method are that communication is given, baud rate parity check sum PLC is consistent, and station address is different.Use STEP7-MICROWIN software transfer PID instruction guide, programming is set as temperature transmitter input value by value of feedback PV_I, setting value SETPOINT_R is set as 35.0, PID manually exports and arranges that to connect touch screen variable given.Using PID regulating parameter to carry out pid parameter to adjust, regulating result to export without departing from, without concussion.
As shown in Figure 2, temperature transmitter gathers standard 4-20mA signal, programmable logic controller (PLC) PLC is supplied to as the value of feedback of closed loop control after being changed by analog-to-digital conversion module, deviation is produced between value of feedback and setting value, proportional integral derivative PID calculating is carried out to deviation, obtains an output value, control frequency converter frequency in real time, regulate variable-frequency motor rotating speed, make lubricating oil temperature be stabilized in setting value.
Cooling blower Direct Conversion can start and shut down, and variable frequency starting can ensure that detent torque is enough large, can not produce impact, and there will not be stall phenomenon, start dead time adjustable.
QF1, KM1, KM3 adhesive during normal operation, frequency variator work KM2 disconnect; When frequency converter failure, KM1, KM3 disconnect, KM2 adhesive, fan electromotor M power frequency operation.Switching time is no more than 3S, ensure that the reliability and stability of system.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.

Claims (5)

1. the piston compressor frequency conversion cooling system based on PID, it is characterized in that, comprise: programmable logic controller (PLC) PLC, human-computer interaction device HMI, fan electromotor, frequency variator and the temperature transmitter for responding to fan electromotor hydraulic fluid temperature, wherein: human-computer interaction device HMI, temperature transmitter, frequency variator are connected with programmable logic controller (PLC) PLC; The power input of described frequency variator is connected with power supply with total lock switch OP1 by selector switch KM1, and its output terminal is connected with fan electromotor by selector switch KM3; Described fan electromotor is connected with power supply with total lock switch OP1 by selector switch KM2.
2. a kind of piston compressor frequency conversion cooling system based on PID according to claim 1, be is characterized in that, communicated between described frequency variator with programmable logic controller (PLC) PLC by RS485 serial ports.
3. a kind of piston compressor frequency conversion cooling system based on PID according to claim 1, it is characterized in that, described human-computer interaction device HMI is communicated by RS485 serial ports with between programmable logic controller (PLC) PLC.
4. a kind of piston compressor frequency conversion cooling system based on PID according to claim 1, is characterized in that, the programmable logic controller (PLC) PLC of described PLC to be model be CPU224XP.
5. a kind of piston compressor frequency conversion cooling system based on PID according to claim 1, it is characterized in that, described human-computer interaction device is smart700 touch screen.
CN201520058475.6U 2015-01-28 2015-01-28 A kind of piston compressor frequency conversion cooling system based on PID Expired - Fee Related CN204476699U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520058475.6U CN204476699U (en) 2015-01-28 2015-01-28 A kind of piston compressor frequency conversion cooling system based on PID

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520058475.6U CN204476699U (en) 2015-01-28 2015-01-28 A kind of piston compressor frequency conversion cooling system based on PID

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109470906A (en) * 2018-09-28 2019-03-15 彩虹(合肥)液晶玻璃有限公司 A kind of operating current acquisition device and method
CN110159517A (en) * 2019-05-29 2019-08-23 深圳市深蓝新能源电气有限公司 The variable frequency drives and heat preserving method of frequency-changeable compressor heat insulation function can be achieved
CN111005889A (en) * 2019-11-06 2020-04-14 中水淮河规划设计研究有限公司 Intelligent pump station main motor pit ventilation adjusting system and ventilation adjusting method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109470906A (en) * 2018-09-28 2019-03-15 彩虹(合肥)液晶玻璃有限公司 A kind of operating current acquisition device and method
CN110159517A (en) * 2019-05-29 2019-08-23 深圳市深蓝新能源电气有限公司 The variable frequency drives and heat preserving method of frequency-changeable compressor heat insulation function can be achieved
CN111005889A (en) * 2019-11-06 2020-04-14 中水淮河规划设计研究有限公司 Intelligent pump station main motor pit ventilation adjusting system and ventilation adjusting method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150715

Termination date: 20200128