Sand-dust blowing environment test device

Abstract

The invention discloses a sand-dust blowing environment test device which comprises a test channel, a sand-dust separation device, a circulating air channel and a sand-dust return pipe, wherein the circulating air channel is formed by the mutual closed loop communication of air return channels, and the return pipe is connected with the sand-dust separation device and the test channel so as to enable sand and dust to be circulated between the sand-dust separation device and the test channel; and the sand-dust blowing environment test device also comprises a dehumidifying device which is arranged on the sand-dust separation device and used for carrying out the dehumidification on air in the circulating air channel. According to the sand-dust blowing environment test device, the dehumidifying device not only has simple structure, but also can remarkably improve the dehumidifying efficiency and the dehumidifying reliability.

Description

technical field [0001] The invention relates to an environmental test device for sand blowing and dust blowing, in particular to an environmental test device for sand blowing and dust blowing with a dehumidification device. Background technique [0002] Sand blowing and dust blowing tests are important means to test the environmental adaptability and environmental reliability of vehicles, aircraft, electrical equipment, and military equipment in deserts, arid areas, and windy sand weather conditions. [0003] In the sand blowing and dust blowing tests, the relative humidity in the test chamber is required to be controlled within the range of ≤30% RH during the test to prevent the sand / dust material from absorbing water and agglomerating, to ensure that the sand and dust particles can be suspended in the airflow, and to avoid Sand dust adheres to the inner wall of the circulating air duct after absorbing water, and reducing the sand dust concentration affects the test results...

AI Technical Summary

Problems solved by technology

[0004] At present, in this kind of sand and dust environment test devices, generally do not have the humidity control function, only a small number of test devices carry out humidity control through the air conditioning system composed of large air-conditioning bypass and small air-conditioning bypass, such as Chinese published patent CN 1621797A, However, this method is expensive and the system is complex

A small number of test devices adopt the dehumidification of the rotary wheel adsorption and refrigeration surface cooler. Since the device is located in front of the sand and dust separation section, sand and dust particles are easy to adhere to the surface of the surface cooler, resulting in a decrease in cooling capacity and increased energy consumption. At the same time, the rotor absorbs small holes It is also easy to be blocked frequently, which increases the frequency of rotor recovery and reduces its working reliability

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