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Display cooler automatic control system
display cooler automatic control system
basic knowledge of automatic adjustment and control
1. The concept and system composition of automatic adjustment control is to make the display cooler refrigeration and air-conditioning system operate normally. It is usually necessary to adjust and control certain thermal parameters of the system (such as temperature, humidity, pressure, flow, liquid level, etc.) to meet its requirements. The indicators required by the process. This process can be completed with the help of an automatic adjustment control system. The so-called automatic adjustment control refers to the use of additional equipment or devices to make a certain working state or thermal parameter of the adjustment object or process reach a given value, or can follow a predetermined rule Automatic changes. It is relative to the concept of manual adjustment control. The automatic adjustment control system is mainly composed of automatic control equipment and adjustment objects, which are composed of controllers, actuators, measuring components, adjustment objects and other parts. The system composition is usually represented by a block diagram, and each block represents a link of the system.
The control principle of the automatic adjustment control system: the measurement element first measures the deviation of the adjusted parameter and the set value, and according to the nature (positive or negative deviation) and size of the deviation, the controller sends out the corresponding signal to drive the actuator to act To keep the adjusted parameter within the set change range. This kind of display cooler adjustment system generally only performs its adjustment after the deviation between the adjusted parameter and the set value occurs. The adjustment process can be summarized as detecting the deviation and correcting the deviation , which belongs to negative feedback control.
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