Automatic temperature and humidity control method for airtight cabinet based on temperature feedback

Abstract

The invention relates to an automatic temperature and humidity control method for an airtight cabinet based on temperature feedback, and belongs to the technical field of shipborne radar environmentalcontrol. The automatic temperature and humidity control method for the airtight cabinet based on the temperature feedback aims to solve the problem of unstable environment temperature in the cabinetwhen the thermal load inside the cabinet changes rapidly. Aiming at the problem, the direct measurement temperature of a heating source is taken as the disturbance, and the temperature of an air supply opening and an air returning opening in the cabinet and the humidity of the air returning opening are taken as the feedback, the advantages of a feedforward compensation control technology and a cascade PID control technology are combined, an integral separation PID control algorithm is adopted, and the self-adaptation control of the temperature and humidity in the airtight cabinet is realized by using a liquid-state cold source. The automatic temperature and humidity control method for the airtight cabinet based on the temperature feedback is high in reliability, high in control speed and good in control effect, and is suitable for a heating load airtight cabinet with the heating value from 1.5kW to 4.5kW.

Description

technical field [0001] The invention belongs to the environment control technology of shipborne radar. Background technique [0002] The shipboard radar cabinet is the control center of the shipboard radar, which is installed in the airtight cabin of the ship. In order to ensure the normal operation of the radar equipment, active cooling equipment must be used to absorb the heat emitted by the cabinet during operation, so as to ensure the stability of the internal temperature of the cabinet. [0003] At present, the heat dissipation of the cabinets in the shipboard radar cabin usually adopts two forms: one is that the cabinets are small in size, small in number, and generate less heat, and rely on the air conditioner in the cabin to achieve natural cooling; the other is that the cabinets are large in size, large in number, and high in heat generation , using centralized circulation ventilation device to achieve forced cooling of the cabinet. The first method does not requi...

AI Technical Summary

Problems solved by technology

The first method does not require additional auxiliary equipment and is simple and easy to implement, but it has great limitations and can only be used for radar cabinets with low power, and the cooling effect is completely dependent on the air conditioner in the cabin

The second method is mainly composed of cooling units, water refrigerant pipelines, cooling air ducts, etc. The cooling effect is good, but the equipment is bulky and the pipelines are complicated; the cooling capacity of each cabinet is determined by the maximum thermal power of the cabinet, and cannot Real-time heating power to realize automatic adjustment of cooling capacity

[0004] Modern shipborne radar is gradually transitioning to a phased array system. The number and power of radar cabinets have increased significantly, and the thermal power of each cabinet is seriously uneven. The traditional temperature control method cannot respond quickly to changes in the thermal load of a single cabinet. Seriously, even Condensation occurs on the surface of the cabinet with low heating power, which damages the equipment

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