A high thermal change rate of test apparatus aims to realize
test equipment requirement of highly accelerated
life test(HALT) and highly accelerated stress screening(HASS). Structurally, the apparatus is provided with a cabinet body with an interior for placing test specimen. The cabinet body is provided with elements of fans,
electric heating tubes and
liquid nitrogen nozzles therein. The positions of the cabinet body and the
control system are separate. Several groups (normally 2 or 3 groups, depends on the size of cabinet) of
liquid nitrogen pipes connecting the cabinet body are flexible stainless steel pipes for enclosing and insulating sleeve tubes. During full-speed temperature cooling, all groups of the pipes simultaneously eject
liquid nitrogen. When temperature is constant, only one group of liquid
nitrogen pipe with cryogenic valve and nozzles is used and micro-adjusted to achieve good temperature stability. The cabinet body can match different types of
shaker combinations to perform temperature / vibration test with high transition rate of temperature, and be used as a single high thermal change rate of temperature cabinet, can have relatively great
assembly flexibility in response to test requirement. The entire apparatus has higher mobility and flexibility than conventional temperature / vibration cabinets.