Combination type drying machines controller

Abstract

The invention discloses a combined-type drier controller. The controller comprises electric elements such as a programmable controller, an analog signal conversion module, a minitype man-machine interface, a communication module, an AC contactor, a relay and so on. The combined-type drier controller adopts the programmable controller as a control master machine and uses the minitype man-machine interface to set operating parameters so as to monitor the operating state of a cold drier and a tepid adsorption drier; meanwhile, the controller has stable performance and wide application range, andcan conveniently realize automatic control and dew point energy-saving control of a combined-type drier; moreover, the system has the functions of refrigerant high pressure, refrigerant low pressure,compressor overload, phase sequence protection, overtemperature alarm and low air pressure alarm stop; the controller can realize the functions of switching and starting up an A tower and a B tower through remote / local control; and the cold drier and the tepid adsorption drier are capable of independent starting up and operating and can conveniently realize host computer communication. The controller can improve the performance of the prior compressed air combined-type drier, and has the practical characteristics of obvious energy-saving effect, simple structure, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of compressed air purification, in particular to a controller of a combined dryer. Background technique [0002] The industry is an industry that has gradually emerged and developed rapidly in my country in recent years. Under the increasingly tense situation of global available resources, the use of compressed air as a power source is widely used in various industries. Various compressed air purification devices have also appeared one after another. For combined dryers, the current domestic combined dryer control systems are controlled by traditional relays or single-chip microcomputers. When this control system is used in combined dryers There are many disadvantages: [0003] 1. Imperfect functions: At present, the single-chip controllers of compressed air combined dryers in China do not have communication functions, alarm functions, and remote control functions. They only have local control functions. In...

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Problems solved by technology

[0004] 2. A large amount of maintenance: due to the single-chip controller of the compressed air combined dryer, no matter which electronic component has a problem, it must be repaired, and because the combined dryer uses a single-chip controller in our country at present, this single-chip controller exists. Weak anti-interference ability, poor stability performance, I / O input and output and processor CPU are easily damaged, so the maintenance amount of single-chip controller is also quite large

[0005] 3. High maintenance cost: Since some manufacturers of compressed air combined dryers do not have maintenance conditions, they have to send the entire control box back to the manufacturer for maintenance. Long maintenance time and high maintenance costs have also brought adverse negative effects to manufacturers of compressed air combined dryers

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