Abstract
Compared with environmental chamber or building air conditioner, the condition of vehicle environmental test chamber is worse. Usually, the tests carried out in nature situation are much limited, and the uncertain elements also make the results different. Vehicle environmental chambers can simulate the humidity of 30-80%, temperature of -40℃—+60℃, wind speed of no more than 260km/h, sunlight, exhaust emission and fresh air supply, which was affected little by the subject element, is an ideal testing method.
Based on the requirments above, by caculating this essay design a refrigeration system of a vehicle environment. And in this system, the refrigeration will make the temperature of the sealed environment in a range of -40℃—+60℃ for light vehicles of no more than 2500kg. This system can simulate the low temperature circumstance of different vehicles, which will be used in vehicle low temperature cold start test, emission test, deforst and so on.
