Control method based on plc in centralized control system of heat pump and washing machine

Abstract

The invention provides a PLC (programmable logic controller) based heat pump and cleaning machine centralized control system and a control method thereof. A heat pump system and a cleaning machine system are combined together through a PLC module through a temperature sensor and a liquid level sensor arranged in a water tank, the PLC module monitors the running status of heat pump units and the cleaning machine system in real time, different heat pump units and auxiliary heaters are controlled to start and stop through the PLC module, the energy-saving advantage of the control system is fully reflected, information exchange and centralized control between the two systems can be managed effectively in time, and more convenience is brought to management and working efficiency is improved by data analysis; a GPRS (general packet radio service) modem of an industrial remote communication module is connected with the PLC module and an Internet-of-Things remote monitoring terminal, the remote monitoring terminal can monitor working condition of field equipment in real time through the GPRS network and the internet, and all functions of a local touch screen are realized.

Description

technical field [0001] The invention belongs to the field of automatic control, in particular to a control method based on PLC in a centralized control system of a heat pump and a cleaning machine. Background technique [0002] At present, there is an insurmountable process in both the manufacturing of machinery and equipment or in the manufacturing process of bearings. It is the cleaning of the parts before assembly. After the various mechanical parts are processed, the parts themselves will produce some dirt. It must be cleaned before use; the current cleaning method is high-temperature hot water cleaning, and the high-temperature hot water generated by the heat pump system is transported to the cleaning machine through the pump, and then the parts are cleaned, but this method There are many shortcomings. First, during the cleaning process, the heat pump heating system and the washing machine system operate independently and cannot interact. If any system fails, manual con...

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Problems solved by technology

[0002] At present, there is an insurmountable process in both the manufacturing of machinery and equipment or in the manufacturing process of bearings. It is the cleaning of the parts before assembly. After the various mechanical parts are processed, the parts themselves will produce some dirt. It must be cleaned before use; the current cleaning method is high-temperature hot water cleaning, and the high-temperature hot water generated by the heat pump system is transported to the cleaning machine through the pump, and then the parts are cleaned, but this method There are many shortcomings. First, during the cleaning process, the heat pump heating system and the washing machine system operate independently and cannot interact. If any system fails, manual control is required, and the degree of automation is not high. Second, the operation Those who cannot obtain real-time temperature values ​​for the temperature of the heat pump system, if the heat pump system does not work normally, breaks down, causing the water temperature to fail to meet the process requirements, it will have an impact on the quality of the cleaning products; As the economic situation changes, the production cycle will also be different accordingly, and the independent control of the heat pump system and the washing machine system sometimes cannot meet the production heat demand, resulting in the process temperature not reaching the standard and affecting product quality; Fourth, users will Production line adjustment, relocation, and reorganization due to production, resulting in a large amount of labor time for equipment management and asset management for statistics and management; fifth, due to the low degree of automation of the cleaning production line, production energy consumption will vary according to the individual capabilities and habits of different operators And different, thus causing unnecessary waste of energy; Sixth, the pH value of the water in the pool is actually very important. If the pH value of the pH value is too low, it will be more corrosive, which will cause corrosion of the pipeline, and it will also corrode when cleaning the parts. If the PH is too high, the parts cannot be cleaned cleanly, the oil stains on the accessories cannot be cleaned cleanly, and the standards are not met; moreover, with the expansion of the enterprise scale, it is more and more urgent to reduce the maintenance cost of the production line. Only when the existing industrial remote control system equipment and On the basis of equipment interconnection, the interconnection and interaction between equipment maintenance personnel, production dispatchers and industrial control network can be realized to more effectively reduce production line maintenance costs, reduce downtime, expand process management and maintenance space dimensions, and further improve the automation level of the process industry. Improving the operating efficiency of industrial remote control systems

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