A flow control system that adjusts the flow rate according to temperature.

Abstract

This invention comprises a flow control structure (1) suitable for cryogenic coolers to adjust the flow rate of the gas entering the environment according to the ambient temperature; an inner tube (4) with a refrigerant gas inlet at one end and the other end almost partially positioned in a slot (7) opened on a cover (6), an outer tube (5) containing the inner tube (4) with one end extending to the cold gas inlet and the other end fixed to the cover (6), having a coefficient of expansion higher than that of the inner tube (4) and moving linearly around the inner tube (4) with heat exchange, allowing the inner tube (4) to move within the slot (7), and a gas outlet hole (8) opened for the refrigerant gas in the inner tube (4) to enter the environment facing the slot (7) on the cover (6).