An intelligent clean ventilation system simulation platform

Abstract

The present invention belongs to the technical field of automatic control of air conditioning systems and industrial Internet of Things, and is an intelligent clean ventilation system simulation platform, including a system stand, electrical circuit equipment, automatic control equipment, adjustment and actuators, data transmission equipment and a cloud platform. The electrical circuit equipment provides a stable and safe power environment for the entire simulation platform, the automatic control equipment includes a touch screen and a PLC module, the adjustment and actuators include a fan inverter and a damper actuator, and the data transmission equipment includes a switch and an Internet of Things gateway. The cloud platform is composed of an industrial computer, and PLC and touch screen programming software, intelligent cloud computing software and Internet of Things data and control platform software installed thereon. The present invention can perform a variety of clean ventilation system control method simulations, not only realizing traditional control simulations of various PLCs, but also performing Internet of Things intelligent control simulations.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic control of air conditioning systems and industrial Internet of Things, and in particular relates to an intelligent clean ventilation system simulation operation platform. Background Art

[0002] Cleanrooms in industries such as biopharmaceuticals, semiconductors, and chip manufacturing have special requirements for their air conditioning systems. The ventilation and air conditioning systems used in such cleanrooms are called clean air conditioning (or purification air conditioning). The clean air conditioning system is mainly composed of two parts: an air handling unit and a clean ventilation system. Among them, the clean ventilation system is mainly composed of fans, air ducts, air valves, and air supply terminals. Its function is to transport the clean air treated by the air handling unit to the clean area (room), and at the same time discharge the replaced air in the clean area. The normal operation of the clean ventilation system is the basis for the entire purification air conditioning system to achieve its air purification in the clean area.

[0003] With the rapid development of purification and air conditioning technology, the corresponding automatic control schemes are constantly upgraded and the complexity is constantly increasing. The testing time and cycle required for the entire automatic control system are also getting longer and longer. Among them, the automatic operation test of the purification and ventilation system involves the control of large air volume fans and numerous air valves. The on-site test is difficult, costly and has a long cycle. Using a simulation bench for automatic operation testing is a more effective means. However, there are still many defects in the existing automatic control system simulation or test bench: 1) The function is single and only meets the simple control program test; 2) There is no human-machine interface on the bench, and the system operation data needs to be viewed on the computer in the control center, which is not conducive to the modification of the control program on the spot; 3) The test bench does not have equipment for data interaction with the outside world, real-time data cannot be transmitted to the outside world, and there is no online display and adjustment function; 4) There is no partition between new and old control logic or equipment, and the transformation project cannot be simulated; 5) The controlled equipment is not integrated on the bench. During the test, only the parameter changes displayed by the control center can be observed, or on-site data is required, and the simulation results are not intuitive. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of existing automatic control system test or simulation benches and provide an intelligent clean ventilation system simulation platform. By designing and integrating cloud computing control center, multiple PLC modules and touch screen, Internet of Things gateway, fan inverter, air valve actuator and other equipment on the bench, the problems in the background technology are finally effectively solved.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an intelligent clean ventilation system simulation platform, which is mainly composed of a system stand, electrical circuit equipment, automatic control equipment, adjustment and actuators, data transmission equipment and a cloud platform.

[0006] The electrical circuit equipment provides a stable and safe power environment for the entire simulation platform, provides the required current and voltage for the control and operation equipment on the system rack, and ensures the stability of electrical signal transmission between devices.

[0007] Furthermore, the electrical circuit equipment includes power supply terminals, a miniature circuit breaker group, a fuse group, a switching power supply, an isolation control transmitter, a first terminal block group, a spare terminal block group, a first intermediate relay group, and a spare intermediate relay group.

[0008] The automatic control device includes a first touch screen and a first PLC module connected and interacting therewith, and further, the automatic control device also includes a second touch screen and a second PLC module, a third PLC module, and a fourth PLC module that interact therewith. The touch screen is used to display the operation results of the automatic control system, and can also be used for manual control of the operation parameters of the automatic control system.

[0009] Furthermore, all PLC modules in the present invention are composed of a programmable controller and its expansion module, an Ethernet module and a power module, and their function is to implement control of the adjustment and actuator according to the automatic control program imported from the PLC and touch screen programming software, or the system energy-saving operation control parameters obtained from the Internet of Things data and the control platform software, and then realize the system operation simulation. The setting of multiple PLC modules can enrich the simulation test range and compatibility of the system simulation platform, and provide conditions for the simulation of the transformation project.

[0010] The regulating and actuating mechanism includes a fan inverter and a damper actuator. In actual projects, the control and regulating devices of the clean ventilation system are fans and dampers. Therefore, the role of the fan inverter here is to simulate the operation and regulation of each fan in the clean ventilation system; the role of the damper actuator is to simulate the switch and opening adjustment of the damper in the clean ventilation system. The operating control parameters of the fan inverter and damper are obtained from each PLC module.

[0011] Further, the fan inverter includes a first fan inverter, a second fan inverter, and a third fan inverter, and the air valve actuator includes a first air valve actuator, a second air valve actuator, and a third air valve actuator. The first fan inverter, the second fan inverter, and the third fan inverter can respectively simulate the operation of the fresh air fan, the supply air fan, and the exhaust air fan of the clean ventilation system; the first air valve actuator, the second air valve actuator, and the third air valve actuator can respectively simulate the fresh air main valve, the supply air main valve, and the exhaust air main valve of the clean ventilation system.

[0012] The data transmission equipment includes a switch and an IoT gateway. The function of the switch is to collect and transmit data. The operating data of all PLC modules are collected in the switch and then transmitted to the IoT gateway and industrial computers through the switch. Conversely, the data sent by the IoT gateway and industrial computers are also transmitted to each PLC module through the switch; the IoT gateway is connected to the switch for data exchange and transmission with the PLC module, and the IoT gateway transmits and exchanges data with the industrial computer at the same time, and establishes a data interaction connection between the IoT data and the control platform software in the PLC module and the industrial computer.

[0013] The cloud platform is composed of an industrial computer, and PLC and touch screen programming software, intelligent cloud computing software and Internet of Things data and control platform software installed thereon. Among them, the industrial computer serves as the supporting hardware for the operation of the cloud platform and its built-in software; the role of the PLC and touch screen programming software is to compile the programs of all PLC modules and touch screens in the simulation platform to meet the control scheme and display requirements; the role of the intelligent cloud computing software is to calculate the fan frequency and air valve opening that meet the energy-saving optimization operation according to the simulated working conditions of the simulated clean ventilation system, and output the calculation results; the installation of the Internet of Things data and control platform software can be used as an Internet of Things data and control platform in the industrial computer. On the one hand, the platform can accept the operation data of the regulation and actuator transmitted by the Internet of Things gateway and display the data in real time on the page, and at the same time pass it to the intelligent cloud computing software as the calculation input, and on the other hand, the fan frequency and air valve opening data that meet the energy-saving optimization operation calculated by the intelligent cloud computing software are passed to the first PLC module through the Internet of Things gateway, and then the operation control simulation of the regulation and actuator is realized.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1) It can simulate a variety of clean ventilation system control methods, not only realizing traditional control simulation of various PLCs, but also realizing intelligent control simulation of the Internet of Things;

[0016] 2) There are two human-machine interfaces on the system platform, and data display and program compilation can be performed on the touch screen and computer at the same time;

[0017] 3) The system simulation platform realizes the function of exchanging data with the outside world through the Internet of Things gateway, and can display the implementation operation data in the form of a web page on the Internet of Things data and control platform, and has the function of remote online display;

[0018] 4) The adjustment and actuator mechanisms (fan inverter and air valve) are integrated on the system simulation platform, which can intuitively restore the operating conditions of the simulated on-site clean ventilation system on the test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a layout diagram of the rack and equipment of the intelligent clean ventilation system simulation platform involved in the present invention;

[0020] Figure 2 It is a system principle diagram of the intelligent clean ventilation system simulation platform involved in the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings.

[0022] An intelligent clean ventilation system simulation platform is mainly composed of a system stand, electrical circuit equipment, automatic control equipment, adjustment and execution mechanisms, data transmission equipment and a cloud platform.

[0023] The main structure of the system stand 1 is a painted steel plate, which is divided into several groups of accommodation spaces from top to bottom by PVC plastic wire ducts. The accommodation spaces are equipped with connecting brackets (201-206) for fixing equipment, and a side bracket 207 is also installed on the side of the main structure.

[0024] The electrical circuit equipment includes power supply terminals 3, a miniature circuit breaker group 4, a fuse group 5, a switch power supply 6, an isolation control transmitter 7, a first terminal block group 16, a spare terminal block group 17, a first intermediate relay group 18, and a spare intermediate relay group 19.

[0025] The automatic control device includes a first touch screen 8, a first PLC module 10, a second PLC module 11, a third PLC module 14, and a fourth PLC module 15. The function of the touch screen is to display the operation results of the automatic control system, and it can also be used for manual control of the operation parameters of the automatic control system. The touch screen program is imported from the PLC and touch screen programming software; each PLC module is composed of a programmable controller and its expansion module, an Ethernet module, and a power module. The function is to implement the control of the adjustment and actuator according to the automatic control program imported from the PLC and touch screen programming software, or the system energy-saving operation control parameters obtained from the Internet of Things data and the control platform software, and then realize the system operation simulation. The setting of multiple PLC modules is to enrich the simulation test range and compatibility of the system simulation platform, and at the same time provide conditions for the simulation of the transformation project.

[0026] The regulating and actuating mechanism includes a first fan inverter 20, a second fan inverter 21, a third fan inverter 22, a first air valve actuator 23, a second air valve actuator 24, and a third air valve actuator 25. The first fan inverter 20, the second fan inverter 21, and the third fan inverter 22 respectively simulate the operation of the fresh air fan, the supply air fan, and the exhaust air fan of the clean ventilation system; the first air valve actuator 23, the second air valve actuator 24, and the third air valve actuator 25 respectively simulate the fresh air main valve, the supply air main valve, and the exhaust air main valve of the clean ventilation system.

[0027] The data transmission equipment includes a switch 12 and an IoT gateway 13. The function of the switch 12 is to collect and transmit data. The operation data of all PLC modules are collected in the switch, and then transmitted to the IoT gateway 13 and the industrial computer 26 through the switch 12. The data sent by the IoT gateway 13 and the industrial computer 26 are also transmitted to each PLC module through the switch 12; the IoT gateway 13 is connected to the switch 12 for data exchange and transmission with the PLC module. At the same time, the IoT gateway 13 transmits and exchanges data with the industrial computer 26 in the form of 4G communication, and establishes a data interaction connection between the IoT data and the control platform software in the PLC module and the industrial computer 26.

[0028] The cloud platform is composed of an industrial computer 26, and PLC and touch screen programming software, intelligent cloud computing software and Internet of Things data and control platform software installed thereon. Among them, the industrial computer 26 serves as the supporting hardware for the operation of the cloud platform and its built-in software; the role of the PLC and touch screen programming software is to compile the programs of all PLC modules and touch screens in the simulation platform to meet the control scheme and display requirements; the role of the intelligent cloud computing software is to calculate the fan frequency and air valve opening that meet the energy-saving optimization operation according to the simulated working conditions of the simulated clean ventilation system, and output the calculation results; the installation of the Internet of Things data and control platform software can be used as an Internet of Things data and control platform in the industrial computer 26. On the one hand, the platform can accept the operation data of the adjustment and actuator transmitted by the Internet of Things gateway 13 through the 4G signal to display the data in real time on the page, and at the same time pass it to the intelligent cloud computing software as the calculation input, and on the other hand, the fan frequency and air valve opening data that meet the energy-saving optimization operation calculated by the intelligent cloud computing software are passed to the first PLC module 10 through the Internet of Things gateway 13, and then realize the operation control simulation of the adjustment and actuator.

[0029] The specific equipment arrangement of the system rack 1 from top to bottom is as follows: a first connecting frame 201 is installed on the bottom plate of the first group of accommodation spaces at the top, and the power supply terminal 3, the miniature circuit breaker group 4, the fuse group 5, the switch power supply 6, and the isolation control transmitter 7 are fixed on the first connecting frame 201 from left to right in sequence; below, in the second group of accommodation spaces, the first touch screen 8 and the second touch screen 9 are fixed by slots on the painted steel plate; below, a second connecting frame 202 is installed on the bottom plate of the third group of accommodation spaces, and the first PLC module 10, the second PLC module 11, the switch 12, and the Internet of Things gateway 13 are fixed on the second connecting frame 202 from left to right in sequence; below, a third connecting frame 203 is installed on the bottom plate of the fourth group of accommodation spaces, and the third PLC module 14 and the fourth PLC module 15 are fixed on the third connecting frame 203 from left to right in sequence. C module 15; below, a fourth connecting frame 204 is installed on the bottom plate of the fifth group of accommodating space, and the first terminal row group 16 and the first intermediate relay group 18 are fixed on the fourth connecting frame 204 from left to right in sequence; below, a fifth connecting frame 205 is installed on the bottom plate of the sixth group of accommodating space, and the spare terminal row group 17 and the spare intermediate relay group 19 are fixed on the fifth connecting frame 205 from left to right in sequence; below, a sixth connecting frame 206 is installed on the bottom plate of the seventh group of accommodating space, and the first fan inverter 20, the second fan inverter 21, the third fan inverter 22, the first air valve actuator 23, the second air valve actuator 24, and the third air valve actuator 25 are fixed on the sixth connecting frame 206 from left to right in sequence; a side bracket 207 is installed on the side of the bottom of the stand, and an industrial computer 26 is installed on the side bracket 207.

[0030] In the above scheme, the regulating and actuating mechanism of the clean ventilation system is composed of a fan inverter and a damper, so the simulation of the actual operation of the system in the present invention is completed by the regulating and actuating mechanism. Among them, the first fan inverter 20, the second fan inverter 21 and the third fan inverter 22 simulate the fresh air fan, the supply air fan and the exhaust air fan respectively; the first damper actuator 23, the second damper actuator 24 and the third damper actuator 25 simulate the fresh air main valve, the supply air main valve and the exhaust air main valve respectively. The first fan inverter 20, the second fan inverter 21, the third fan inverter 22, the first damper actuator 23, the second damper actuator 24 and the third damper actuator 25 are all connected to the first PLC module 10, and the first PLC module 10 sends a control signal to control the fan frequency and the damper opening.

[0031] The specific model of the programmable controller (PLC) in the first PLC module 10 can be Siemens S7-200 SMART series, which is connected to the first touch screen 8, and the specific model of the first touch screen 8 can be Siemens SMART 700 series. At the same time, the first PLC module 10 is connected to the switch 12, and the switch 12 is connected to the industrial computer 26. In this way, the first touch screen 8 and the first PLC module 10 can import the touch screen program and the PLC automatic control program from the PLC and touch screen programming software built into the industrial computer 26, and the first touch screen 8 manually controls or the first PLC module 10 automatically controls the adjustment and actuator (fan inverter and air valve), thereby realizing the system operation simulation.

[0032] Furthermore, in order to enrich the testing capability, scope and compatibility of the simulation platform, in addition to the simulation scheme with the first PLC module 10 as the control center, a variety of other PLC modules and related equipment are also provided on the system stand 1. The second PLC module 11, the third PLC module 14 and the fourth PLC module 15 are all connected to the switch 12, and are also connected to the second touch screen 9 at the same time. Among them, the model selected by the second PLC module 11 can be the Siemens S7-1500 series, the model selected by the third PLC module 14 can be the Mitsubishi Q series PLC, and the model selected by the fourth PLC module 15 can be the Siemens S7-1200 series; these three models of PLC are stable and powerful automatic controllers commonly used in the field of industrial control, and are representative. The second touch screen 9 is a universal touch screen, which is equipped with drivers for various types of PLCs and is compatible with all PLC modules on the stand. The second touch screen 9, the second PLC module 11, the third PLC module 14 and the fourth PLC module 15 obtain the touch screen program and the automatic control program from the PLC and touch screen programming software in the industrial computer 26 through the switch 12. However, the second PLC module 11, the third PLC module 14 and the fourth PLC module 15 are not connected to the regulating and actuating mechanism (the first fan inverter 20, the second fan inverter 21, the third fan inverter 22, the first air valve actuator 23, the second air valve actuator 24, the third air valve actuator 25) on the system stand 1, and cannot realize the direct control simulation of the regulating and actuating mechanism.

[0033] In order to realize the intelligent operation and multi-functional simulation test of the simulation platform, the IoT gateway 13 is connected to the switch 12, and the IoT gateway 13 transmits and exchanges data with the industrial computer 26 in the form of 4G communication. After the IoT gateway 13 is added, the second PLC module 11, the third PLC module 14 and the fourth PLC module 15 can send control signals to the IoT gateway 13 through the switch 12, and then the IoT gateway 13 sends the control signal to the industrial computer 26 in the form of 4G communication. After the industrial computer 26 receives the control signal, it forwards the control signal outward through the IoT data and control platform software. At this time, the control signal is fed back to the IoT gateway 13 in the form of 4G communication, and the IoT gateway 13 sends the control signal downward to the first PLC control module 10, and then the control simulation of all adjustment and actuators is completed through the first PLC control module 10. This technical solution realizes the mutual communication between the second PLC module 11, the third PLC module 14 and the fourth PLC module 15 and the first PLC module 10, as well as the indirect control of the regulating and executing mechanisms, and can successfully simulate the actual needs of industrial transformation projects, that is, the control of the old PLC of the original system by the newly added PLC equipment, that is, the test bench of the present invention meets the needs of simulating transformation project testing.

[0034] Furthermore, the cloud platform of the present invention is composed of an industrial computer 26 and its built-in LC and touch screen programming software; intelligent cloud computing software; and Internet of Things data and control platform software. After receiving the operating parameters of the regulating and actuating mechanisms (fan inverter and air valve) transmitted by the first PLC module 10, the cloud platform first performs intelligent calculations in the intelligent cloud computing software, obtains the system optimized energy-saving operating parameters, and then transmits them to the Internet of Things data and control platform. Subsequently, the cloud platform sends these energy-saving operating control parameters back to the first PLC module 10 through the Internet of Things gateway 13. The first PLC module 10 controls all regulating and actuating mechanisms, and then realizes the intelligent energy-saving operation regulation simulation of the clean ventilation system.

Claims

1. An intelligent clean ventilation system simulation platform, characterized by: Including system racks, electrical circuit equipment, automatic control equipment, regulation and actuators, data transmission equipment and cloud platforms; The electrical circuit equipment provides the required current and voltage for the control and operation equipment on the system rack, and ensures the stability of electrical signal transmission between the equipment; the electrical circuit equipment includes power supply terminals, a miniature circuit breaker group, a fuse group, a switching power supply, an isolation control transmitter, a first terminal block group, a spare terminal block group, a first intermediate relay group and a spare intermediate relay group; The automatic control device includes a first touch screen and a first PLC module connected and interacting therewith, and also includes a second touch screen and a second PLC module, a third PLC module and a fourth PLC module interacting therewith; The regulating and actuating mechanism comprises a first fan frequency converter, a second fan frequency converter, a third fan frequency converter, a first air valve actuator, a second air valve actuator and a third air valve actuator. The first fan frequency converter, the second fan frequency converter and the third fan frequency converter respectively simulate the operation of the fresh air fan, the supply air fan and the exhaust air fan of the clean ventilation system; the first air valve actuator, the second air valve actuator and the third air valve actuator respectively simulate the operation of the fresh air main valve, the supply air main valve and the exhaust air main valve of the clean ventilation system; The data transmission equipment includes a switch and an Internet of Things gateway; The cloud platform calculates the fan frequency and air valve opening that meet the energy-saving and optimized operation according to the simulated working conditions of the clean ventilation system, and outputs the calculation results, thereby realizing the operation control simulation of the adjustment and actuator; the cloud platform is composed of an industrial computer, and PLC and touch screen programming software, intelligent cloud computing software, and Internet of Things data and control platform software installed on the industrial computer; The IoT gateway is connected to the switch, and the IoT gateway transmits and exchanges data with the industrial computer. The second PLC module, the third PLC module and the fourth PLC module can all send control signals to the IoT gateway through the switch, and then the IoT gateway sends the control signal to the industrial computer. After the industrial computer receives the control signal, it forwards the control signal outward through the IoT data and control platform software. At this time, the control signal is fed back to the IoT gateway, and the IoT gateway sends the control signal downward to the first PLC control module, and then completes the control simulation of all adjustment and actuators through the first PLC control module.

2. An intelligent clean ventilation system simulation platform as claimed in claim 1, characterized in that: The specific equipment arrangement of the system rack from top to bottom is as follows: a first connecting frame is installed on the bottom plate of the first group of accommodation spaces at the top, and a power supply terminal, a miniature circuit breaker group, a fuse group, a switching power supply and an isolation control transmitter are fixed on the first connecting frame in sequence from left to right; Below, in the second group of accommodation spaces, the first touch screen and the second touch screen are fixed in the grooves on the painted steel plate; below, the second connecting frame is installed on the bottom plate of the third group of accommodation spaces, and the first PLC module, the second PLC module, the switch and the Internet of Things gateway are fixed on the second connecting frame from left to right in sequence; Below, a third connecting frame is installed on the bottom plate of the fourth group of accommodation spaces, and a third PLC module and a fourth PLC module are fixed on the third connecting frame in sequence from left to right; Below, a fourth connecting frame is installed on the bottom plate of the fifth group of accommodating spaces, and a first terminal row group and a first intermediate relay group are fixed on the fourth connecting frame in sequence from left to right; Below, the fifth connecting frame is installed on the bottom plate of the sixth group of accommodating space, and the spare terminal block group and the spare intermediate relay group are fixed on the fifth connecting frame from left to right; below, the sixth connecting frame is installed on the bottom plate of the seventh group of accommodating space, and the first fan inverter, the second fan inverter, the third fan inverter, the first air valve actuator, the second air valve actuator and the third air valve actuator are fixed on the sixth connecting frame from left to right; a side bracket is installed on the bottom side of the stand, and an industrial computer is installed on the side bracket.

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