The structure of the high and low temperature impact test box usually has three forms: single box type, vertical lifting type and horizontal two box type.
Due to the large cooling capacity and heating capacity required, the single box type has poor feasibility and few practical applications.
The vertical lifting type avoids the influence of the external environment through the conversion of the internal lifting, but because the lifting device itself consumes cold or heat as a thermal load, this method is usually suitable for small test chambers, for medium and large test chambers Because the lifting device is too heavy, this method is not applicable.
The horizontal two-box type reduces the load of the box and reduces the cooling and heating capacity of the equipment through the mutual conversion between the two boxes. However, a horizontal conversion device is required and will be affected by the external environment.
Therefore, the selection of the test method should be analyzed according to the specific situation.For small equipment, the vertical lifting method is used to reduce one box, which can save costs; for medium and large-scale test equipment, as long as the scheme is reasonable and feasible, it can ensure that it meets the national military standards Requirements, the use of horizontal two-box test plan is a better choice.
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