| abstract |
(57) [Abstract] [Problem] The water of the chamber drain of the temperature and humidity tester and its drain pipe, the water of the dew receiving drain and its drain pipe, and the overflow drain pipe rot under a high temperature and high humidity environment for a long time, Prevent clogging of these drains. SOLUTION: A vacuum pump 4, a buffer box 32, and a time-sequential control are provided to a common drain pipe 21 system to which an overflow drain pipe 20, a chamber drain drain pipe 23, and a dew receiving drain drain pipe 25 are connected. Forced drainage means 3 constituted by a buffer box portion including three solenoid valves 31a, 31b, 31c Is added. [Effect] It is possible to prevent a situation in which the drainage pipe is clogged, and avoid a loss in product development and manufacturing in the reliability test. |