公开(公告)号：US11236863B2

公开(公告)日：2022-02-01

申请号：US16225396

申请日：2018-12-19

申请人： UT-Battelle, LLC

发明人： Mariano M Ruiz-Rodriguez ,  Saad R Elorfi ,  Christopher M Redmon ,  Ryan J Morgan

IPC分类号： F17C13/00 ,  F17C13/08 ,  F17C5/06 ,  F17C13/02

摘要： An improved system and method for the automated refilling of cryogenic helium is provided. In one embodiment, the system includes a dewar in fluid communication with a liquid helium cryostat through a cryogen transfer line. A controller regulates operation of a three-way valve to pre-cool the transfer line and to cause gaseous helium to flow to the dewar and force liquid helium through the transfer line into the cryostat. The controller is coupled to the output of a cryogenic level sensor, such that the controller regulates the helium liquid level within the cryostat. During filling cycles, the dewar liquid level is also monitored by the cryogenic level sensor and an alarm sounds if the dewar liquid level is undesirably low. Between filling cycles, the controller is operable to ventilate the dewar through a solenoid vent valve in fixed time intervals to ensure the dewar pressure is sufficiently low so as to not bleed liquid helium into the cryostat.

公开(公告)号：US20190211970A1

公开(公告)日：2019-07-11

申请号：US16225396

申请日：2018-12-19

申请人： UT-Battelle, LLC

发明人： Mariano M Ruiz-Rodriguez ,  Saad R Elorfi ,  Christopher M Redmon ,  Ryan J Morgan

IPC分类号： F17C5/06 ,  F17C13/02

CPC分类号： F17C5/06 ,  F17C13/025 ,  F17C2221/017 ,  F17C2223/0161 ,  F17C2223/033 ,  F17C2225/0123 ,  F17C2250/043

摘要： An improved system and method for the automated refilling of cryogenic helium is provided. In one embodiment, the system includes a dewar in fluid communication with a liquid helium cryostat through a cryogen transfer line. A controller regulates operation of a three-way valve to pre-cool the transfer line and to cause gaseous helium to flow to the dewar and force liquid helium through the transfer line into the cryostat. The controller is coupled to the output of a cryogenic level sensor, such that the controller regulates the helium liquid level within the cryostat. During filling cycles, the dewar liquid level is also monitored by the cryogenic level sensor and an alarm sounds if the dewar liquid level is undesirably low. Between filling cycles, the controller is operable to ventilate the dewar through a solenoid vent valve in fixed time intervals to ensure the dewar pressure is sufficiently low so as to not bleed liquid helium into the cryostat.