CN105652774A - Refrigeration device control system - Google Patents
Refrigeration device control system Download PDFInfo
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- CN105652774A CN105652774A CN201410629091.5A CN201410629091A CN105652774A CN 105652774 A CN105652774 A CN 105652774A CN 201410629091 A CN201410629091 A CN 201410629091A CN 105652774 A CN105652774 A CN 105652774A
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Abstract
The invention provides a refrigeration device control system comprising an electric control box, two refrigeration units and a water cooling unit. The electric control box acquires an external control signal as well as switching signals and analog signals of the refrigeration units and the water cooling unit through a PLC (programmable logic controller) to control the temperature, and the electric control box connects the acquired signals to an industrial personal computer through a PLC interface and transmits the signals to a principal computer for real-time display. The refrigeration device control system can meet the requirement of high-precision control, and has a wide applicable scope and strong anti-jamming capability.
Description
Technical field
The invention belongs to automatic control technology field, it is specifically related to a kind of refrigeration plant Controlling System.
Background technology
In high power semi-conductor components and parts working process, the problem of a large amount of heat can be given out, the too high meeting of temperature causes high power semi-conductor component damage, therefore must being cooled by power semiconductor components and parts, traditional refrigerating unit Controlling System is that semiconductor components and devices is cooled by the water coolant utilizing relative temperature lower or wind. Air cooling way due to the temperature difference little, cooling efficiency is low, and cooling performance is poor; Current most of occasion adopts water coolant mode, but causes the problems such as semiconductor components and devices temperature change is big, unstable compared with low due to the precision of the temperature sensor of the employing of Controlling System. Serious deficiency is there is in these two kinds of modes in control accuracy, its precision can only reach once positive and negative, and its cooling temperature lower limit is subject to the impact of the temperature of coolant water temperature and wind, traditional method cannot meet the application scenario that the requirement of semiconductor components and devices temperature stability is higher.
Traditional refrigeration plant Controlling System mainly contains following shortcoming in the application: (1) temperature signal pick-off precision is lower, and the time of response is long; (2) working conditions is limited, can not meet the use of some special dimensions, and such as envrionment temperature working range width, electromagnetic environment is complicated; (3) big mainly with micro-chip as control treatment unit, the immunity from interference of system is poor; Switchboard adopts printed board patten's design, and hardware circuit is complicated, and integrated level is lower, not easily modularization and stdn.
Summary of the invention
It is an object of the invention to provide a kind of refrigeration plant Controlling System, it can meet high precision control overflow, applied widely, and immunity from interference is strong.
In order to solve the problems of the technologies described above, the present invention provides a kind of refrigeration plant Controlling System, it is characterised in that, comprise electric control box one, refrigeration unit two and water cooling unit one; Described electric control box gathers switch signal and the simulating signal of external control signal and refrigeration unit and water cooling unit by PLC, realize the control to temperature, the signal collected is connected with industrial computer by PLC interface by electric control box simultaneously, and it is transferred to upper computer, show in real time. Described electric control box comprises cabinet one, switch power supply one, PLC mono-, AD expand module two, industrial computer one, alternating current contactor seven, thermo-relay three, intermediate relay seven, phase sequence relay one, warning pilot lamp 20, mask switch seven, manual switch three, gear on-off one, connector seven; Each refrigeration unit described includes one, compressor, pressure transmitter one, blower fan three, high and low voltage switch one; Described water cooling unit comprises one, water pump, flow sensor three, temperature sensor one; Described connector comprises power connector, remote control connector, communication mouth connector, the first refrigeration unit connector, the 2nd refrigeration unit connector, the first water cooling unit connector, the 2nd water cooling unit connector.
By carrying, serial ports is directly connected by cable PLC with industrial computer, and transmits exchange data; The digital input aperture of PLC is directly connected with the 2nd refrigeration unit connector, water cooling unit connector with remote control connector, the first refrigeration unit connector by cable, and the power supply of PLC is through the outside power supply of power connector knot.
The power supply port of switch power supply is directly connected with the power supply port of PLC by cable; The output of switch power supply is directly connected with industrial computer power supply port.
Pressure transmitter output signal in first refrigeration unit, the 2nd refrigeration unit is connected with AD conversion module by the first refrigeration unit connector, the 2nd refrigeration unit connector; Three flow sensor output signals in water cooling unit are connected with AD conversion module by the 2nd water cooling unit connector; Plc data mouth is connected by data flat cable and Analog input mModule two AD conversion module carried; The power supply port of AD conversion module is connected with the delivery port of switch power supply, and the analog input channel interface of two AD conversion module is connected by cable with the first refrigeration unit connector, the 2nd refrigeration unit connector, the 2nd water cooling unit connector respectively.
PLC comprises control module; Alarm and protection module; Communication processing module; Described control module, for controlling the work of compressor, ensures the constant of leaving water temperature(LWT); Described guard signal processing module, for process and the display of various fault; Described Communication processing module, transfers data to upper computer display.
Compared with prior art, its remarkable advantage is in the present invention: (1) adopts the analog quantity sensors such as the temperature of high precision, flow, pressure, and output signal resolving power height, meets high precision control overflow; (2) normally can use under, electromagnetic environment complexcase relatively wide in operating temperature range; (3) 3, PLC (programmable logic controller) have employed the anti-interference measure of a series of hardware and software, uses it as control unit, and the immunity from interference of system is strong; (4) hardware circuit is simple, and integrated level height, is easy to modularization and stdn.
Accompanying drawing explanation
Fig. 1 is refrigeration plant Controlling System schematic diagram of the present invention.
Fig. 2 is refrigeration plant Controlling System signal wiring figure of the present invention.
Embodiment
As shown in Figure 1, a kind of refrigeration plant Controlling System of the present invention comprises electric control box one, refrigeration unit two and water cooling unit one. Described electric control box gathers switch signal and the simulating signal of the switch signal on electric control box front panel (external control signal) and refrigeration unit and water cooling unit by PLC (programmable logic controller), realize the accurate control to temperature, the maximum collection number of switch signal is 48, the maximum collection number of simulating signal is 16, has simultaneously and extends out function; The signal collected is connected with industrial computer (PC104) by the RS232 interface of PLC (programmable logic controller) by electric control box simultaneously, and is transferred to upper computer, shows in real time.
Described electric control box comprises cabinet one, switch power supply one, PLC (programmable logic controller), AD expand module two, industrial computer (PC104), alternating current contactor seven, thermo-relay three, intermediate relay seven, phase sequence relay one, warning pilot lamp 20, mask switch seven, manual switch three, gear on-off one, connector seven; Refrigeration unit two; Each refrigeration unit described includes one, compressor, pressure transmitter one, blower fan (analog output) three, high and low voltage switch one; Described water cooling unit comprises one, water pump, flow sensor (output switch parameter) three, temperature sensor (analog output).
PLC is directly connected by cable with the com port of industrial computer (PC104) by com port (RS232) serial ports carried, and transmits exchange data; The DI mouth (numeral input aperture) of PLC is directly connected with the 2nd refrigeration unit connector, water cooling unit connector with remote control connector, the first refrigeration unit connector by cable, the power supply of PLC, then is provided through the output terminal of AC transformation device (380VAC/220VAC) through power connector by AC380V50Hz;
Pressure transmitter output signal in first refrigeration unit, the 2nd refrigeration unit is connected with AD conversion module by the first refrigeration unit connector, the 2nd refrigeration unit connector, and three flow sensor output signals in water cooling unit are connected with AD conversion module by the 2nd water cooling unit connector; Plc data mouth is connected by data flat cable and Analog input mModule two AD conversion module carried. The DO mouth (digital output) of PLC controls the work of corresponding alternating current contactor after being amplified by signal by cable and intermediate relay, and alternating current contactor controls compressor or pump operation again through the overheating protection of thermo-relay. Normal operation wanted by water pump in addition, and the direction of motion of rotor must be correct, otherwise water pump meeting stall, between water pump and thermo-relay, therefore add phase sequence relay, ensure that the rotor motion of water pump is in the right direction.
The power supply port (220VAC) of switch power supply is directly connected with the power supply port of PLC by cable; The output volts DS DC5V of switch power supply is directly connected with the DC5V power supply port of industrial computer (PC104).
The DC24V power supply port of AD conversion module is connected with the DC24V delivery port of switch power supply, and the analog input channel interface of two AD conversion module is connected by cable with the first refrigeration unit connector, the 2nd refrigeration unit connector, the 2nd water cooling unit connector respectively.
Connector totally seven, namely power connector, remote control connector, communication mouth connector, first refrigeration unit connector, the 2nd refrigeration unit connector, the first water cooling unit connector, the 2nd water cooling unit connector; Wherein,
1) power connector is connected with the elementary AC380V of AC transformation device by cable, and the other end is connected with total power supply AC380V;
2) communication mouth connector is connected by the net mouth of cable with industrial computer (PC104), and the other end is connected with upper computer;
3) remote control connector is connected with the DI mouth (numeral input aperture) of PLC by cable, and the other end is connected with master station;
4) the first refrigeration unit connector, the 2nd refrigeration unit connector are connected with DI mouth (numeral input aperture), the DO mouth (digital output) of PLC by cable, and the other end is connected with the first refrigeration unit, the 2nd refrigeration unit;
5) the first water cooling unit connector, the 2nd water cooling unit connector are connected with DI mouth (numeral input aperture), the DO mouth (digital output) of PLC by cable, and the other end is connected with water cooling unit.
Industrial computer (PC104) one. Industrial computer (PC104) is provided with Vxworks operating system, COM1 (RS232) serial ports of industrial computer (PC104) is connected by cable with COM (RS232) mouth of PLC, and the net mouth of industrial computer (PC104) is connected with communication mouth connector by cable.
In refrigeration plant Controlling System of the present invention, PLC (programmable logic controller) comprises three modules: control module; Alarm and protection module; Communication processing module.
Control module, for controlling the work of compressor, ensures the constant of leaving water temperature(LWT). Control module has three kinds of mode of operation: full rotation type, manual type, distance type, and the mode of operation of acquiescence is full rotation type. Wherein,
Full-automatic mode is: when change-over switch is in " automatically " position, as long as cooling machine cabinet has power supply, namely starts to run; Operational process is by PLC controlling run, and when having guard signal, corresponding part auto stop, with proterctive equipment. Press corresponding mask switch, then guard signal is shielded, and equipment resumes operation automatically.
Manual mode is: when change-over switch is in " manually " position, and cooling machine cabinet is locally through each pressure run switch, and people is for carrying out controlling run, and now PLC does not participate in control. Although each sensor still carries out work, and has guard signal to show, but the operation and stopping with cooling machine cabinet does not have control planning. This pattern arranges for the pressure of cooling machine cabinet under special circumstances runs, and now running of equipment is determined according to the change of concrete practical situation by operator with stopping.
Remote control mode is: when change-over switch is in " remote control " position, and cooling machine cabinet is by the control of long-range remote signal determines whether run, and when there being distant control signal, equipment starts to run, and operational process is with automatically equally controlling by PLC. Remote signal disappears, and equipment is out of service.
Guard signal processing module, for process and the display of various fault. When guard signal occurs, corresponding warning light is bright, and guard signal enters PLC simultaneously, and PLC determines work or the stopping of corresponding execution unit according to the character of guard signal. Being provided with corresponding mask switch on electric control box panel simultaneously, when a certain road nondestructive guard signal needs shielding, opened by mask switch, at this moment guard signal is shielded, and warning light goes out, and equipment continues normal operation. During as produced destructive guard signal, electrical control system then can stop work, till this guard signal is eliminated.
Communication processing module, transfers data to upper computer display. The data detected packing is transmitted data by RS232 interface to PC104 by PLC, and its signalling methods is serial ports No Protocol Communication. Then by PC104 process information, undertaken communicating by the Ethernet mouth of PC104 and upper computer display panel control and show Various types of data and state.
Claims (6)
1. a refrigeration plant Controlling System, it is characterised in that, comprise electric control box one, refrigeration unit two and water cooling unit one; Described electric control box gathers switch signal and the simulating signal of external control signal and refrigeration unit and water cooling unit by PLC, realize the control to temperature, the signal collected is connected with industrial computer by PLC interface by electric control box simultaneously, and it is transferred to upper computer, show in real time.
2. refrigeration plant Controlling System as claimed in claim 1, it is characterized in that, described electric control box comprises cabinet one, switch power supply one, PLC mono-, AD expand module two, industrial computer one, alternating current contactor seven, thermo-relay three, intermediate relay seven, phase sequence relay one, warning pilot lamp 20, mask switch seven, manual switch three, gear on-off one, connector seven; Each refrigeration unit described includes one, compressor, pressure transmitter one, blower fan three, high and low voltage switch one; Described water cooling unit comprises one, water pump, flow sensor three, temperature sensor one; Described connector comprises power connector, remote control connector, communication mouth connector, the first refrigeration unit connector, the 2nd refrigeration unit connector, the first water cooling unit connector, the 2nd water cooling unit connector.
3. refrigeration plant Controlling System as claimed in claim 2, it is characterised in that, by carrying, serial ports is directly connected by cable PLC with industrial computer, and transmits exchange data; The digital input aperture of PLC is directly connected with the 2nd refrigeration unit connector, water cooling unit connector with remote control connector, the first refrigeration unit connector by cable, and the power supply of PLC is through the outside power supply of power connector knot.
4. refrigeration plant Controlling System as claimed in claim 2, it is characterised in that, the power supply port of switch power supply is directly connected with the power supply port of PLC by cable; The output of switch power supply is directly connected with industrial computer power supply port.
5. refrigeration plant Controlling System as claimed in claim 2, it is characterised in that, the pressure transmitter output signal in the first refrigeration unit, the 2nd refrigeration unit is connected with AD conversion module by the first refrigeration unit connector, the 2nd refrigeration unit connector; Three flow sensor output signals in water cooling unit are connected with AD conversion module by the 2nd water cooling unit connector; Plc data mouth is connected by data flat cable and Analog input mModule two AD conversion module carried; The power supply port of AD conversion module is connected with the delivery port of switch power supply, and the analog input channel interface of two AD conversion module is connected by cable with the first refrigeration unit connector, the 2nd refrigeration unit connector, the 2nd water cooling unit connector respectively.
6. refrigeration plant Controlling System as claimed in claim 2, it is characterised in that, PLC comprises control module; Alarm and protection module; Communication processing module;
Described control module, for controlling the work of compressor, ensures the constant of leaving water temperature(LWT);
Described guard signal processing module, for process and the display of various fault;
Described Communication processing module, transfers data to upper computer display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410629091.5A CN105652774A (en) | 2014-11-10 | 2014-11-10 | Refrigeration device control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410629091.5A CN105652774A (en) | 2014-11-10 | 2014-11-10 | Refrigeration device control system |
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| CN105652774A true CN105652774A (en) | 2016-06-08 |
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| CN201410629091.5A Pending CN105652774A (en) | 2014-11-10 | 2014-11-10 | Refrigeration device control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106684818A (en) * | 2017-03-13 | 2017-05-17 | 广东美的暖通设备有限公司 | Overvoltage protection circuit, overvoltage protection method and overvoltage protection device |
| CN110868646A (en) * | 2019-11-28 | 2020-03-06 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Transmitting base station with water-cooling monitoring device |
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| CN201556071U (en) * | 2009-09-14 | 2010-08-18 | 保定天威集团有限公司 | Intelligent control circuit of water-cooling system of gas transformer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684818A (en) * | 2017-03-13 | 2017-05-17 | 广东美的暖通设备有限公司 | Overvoltage protection circuit, overvoltage protection method and overvoltage protection device |
| CN106684818B (en) * | 2017-03-13 | 2018-11-13 | 广东美的暖通设备有限公司 | Overvoltage crowbar, over-voltage protection method and over-pressure safety device |
| CN110868646A (en) * | 2019-11-28 | 2020-03-06 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Transmitting base station with water-cooling monitoring device |
| CN110868646B (en) * | 2019-11-28 | 2022-03-08 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Transmitting base station with water-cooling monitoring device |
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Application publication date: 20160608 |
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