High-altitude environment test parameter control system in large-flow ventilation environment

Abstract

The invention provides a high-altitude environment test parameter control system in a large-flow ventilation environment. The high-altitude environment test parameter control system in the large-flowventilation environment comprises a box body which is divided into a test chamber and an air conditioning chamber through an air duct separation plate, and a fence air supply port and an air return port are separately formed in the air duct separation plate, a temperature-regulating heat sink is arranged in the test chamber, a variable frequency motor, a centrifugal wind wheel, an electric heater,a refrigeration evaporator and a dehumidification evaporator are arranged in the air conditioning chamber, and the output end of the variable frequency motor is connected with the centrifugal wind wheel; and an air supply unit, a humidifying unit, a vacuumizing unit, a refrigerating unit, a heat conduction oil heat exchange unit and a measurement control unit are arranged on the outer side of thebox body. The high-altitude environment test parameter control system in the large-flow ventilation environment has the beneficial effects that air in the air conditioning chamber circularly enters the test chamber, a comprehensive test system can meet dynamic temperature, height and humidity parameter control required by high-altitude environment test simulation, the environment in the test chamber is accurately regulated and controlled through the measurement control unit, the control system is low in energy consumption, and the actual working condition of aviation airborne electronic equipment can be accurately simulated.

Description

technical field [0001] The disclosure relates to the technical field of comprehensive environmental testing of aviation airborne products, in particular to a parameter control system for high-altitude environmental testing in a large-flow ventilation environment. Background technique [0002] The basic principle of aviation product reliability test is to simulate the influence of environmental factors in the actual use of the product as realistically as possible, so as to expose the defects of the product. There are many high-power electronic products in aviation airborne equipment that need to be ventilated and cooled by the environmental control system to ensure their reliability during use. Therefore, real working conditions should also be simulated when conducting their reliability tests. [0003] During the real working process of aviation airborne equipment, its cooling and ventilation gas is directly discharged into the high-altitude atmosphere. In the artificial simu...

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Problems solved by technology

At present, the reliability test equipment for aviation products on the market can only simulate the closed and stable high-altitude environment test device, lacks the control ability of high-altitude environment parameters under dynamic ventilation and cooling conditions, and cannot simulate the real environment. Therefore, aviation airborne ventilation and cooling tests are mostly used Item-by-item accumulative assessment method for single environmental test

However, the cumulative error of the comprehensive environmental effect and single environmental effect acting on the test piece is extremely large, resulting in the distortion of the test results of the test piece, and even the failure of the whole machine. Therefore, it is urgent to develop a high-altitude environmental test parameter control system in a large-flow ventilation environment.

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