Rapid temperature change test box

Abstract

The invention discloses a rapid temperature change test box, and belongs to the field of environmental stress screening test equipment. The rapid temperature change test box comprises a box which comprises a box body and separating layers which separate the internal part of the box body into three intervals. The three intervals are a work room, a refrigerating room and a power distribution room in turn. The work room is internally provided with an axial flow blower. The power distribution room is internally provided with a motor driving the axial flow blower. Magnetic transmission is adopted between the motor and the axial flow blower. Magnetic transmission is adopted between the motor and the axial flow blower, and a through hole does not need to be arranged on the box between the motor and the axial flow blower for arrangement of a transmission shaft so that a box sealing performance problem caused by existence of the through hole can be avoided, and box sealing performance can be enhanced. With increasing of sealing performance, moist air exchange inside and outside the test box is reduced, and humidity in the box is relatively low in the test process so that influence on the test result caused by condensation on the product can be avoided and accuracy of the test result can be enhanced.

Description

technical field [0001] The invention relates to the field of environmental stress screening test equipment, in particular to a rapid temperature change test chamber. Background technique [0002] Environmental Stress Screening (ESS for short) is a series of tests conducted under environmental stress in order to find and eliminate defective parts, components, and process defects in products and prevent early failure. Among them, environmental stress is selected according to the effect of product screening. For electronic products, environmental stress mainly chooses temperature cycle and random vibration, which are realized by corresponding test chambers. For example, rapid temperature change in temperature cycle (such as temperature range is -55°C ~ +70°C, temperature change rate is ≥ 5°C) is achieved by using a rapid temperature change test chamber. [0003] The military standard of the environmental stress screening method for electronic products requires the control of ...

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Problems solved by technology

[0006] In order to solve the problem of high humidity in the box in the prior art, which causes condensation on the product and affects the test results, the embodiment of the present invention provides a rapid temperature change test box

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