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公开(公告)号:US5517823A
公开(公告)日:1996-05-21
申请号:US374140
申请日:1995-01-18
申请人: Bruce R. Andeen , Gerald J. Fortier , Allen J. Bartlett , Michael J. Eacobacci , Philip C. Lessard
发明人: Bruce R. Andeen , Gerald J. Fortier , Allen J. Bartlett , Michael J. Eacobacci , Philip C. Lessard
CPC分类号: F04B37/085 , Y10S417/901
摘要: In a subatmospheric regeneration process, a relief valve and a roughing valve are coupled in parallel to a common roughing pump. During regeneration, the cryopump is warmed to release gases from cryopump stages. The relief valve opens at a first cryopump pressure level less than a predetermined maximum pressure. The maximum pressure is subatmospheric. The relief valve closes when the cryopump pressure drops below a second cryopump pressure level. Pressure in a line between the relief valve and the roughing pump is monitored to control the opening of the roughing valve to the roughing pump.
摘要翻译: 在低于大气压的再生过程中,安全阀和粗加工阀与共同的粗加工泵并联。 在再生期间,将低温泵加热以从低温泵阶段释放气体。 安全阀在低于预定最大压力的第一低温泵压力水平下打开。 最大压力低于大气压。 当低温泵压力低于第二低温泵压力水平时,安全阀关闭。 监控安全阀和粗加油泵之间管路中的压力,以控制粗加油阀对粗加油泵的打开。