发明名称 |
Bubble detection and recovery in a liquid pumping system |
摘要 |
A serial, dual piston high pressure fluid pumping system that overcomes the difficulties of gas in the fluid stream without the need for added mechanical valves or fluid paths. A bubble detection and recovery mechanism monitors compression and decompression volumes of the serially configured dual pump head pump, and the overall system delivery pressure. Bubble detection is effected by sensing a ratio of compression to decompression volume and determining if the ratio exceeds an empirical threshold that suggests the ratio of gas-to-liquid content of eluent or fluid in the system is beyond the pump's ability to accurately meter a solvent mixture. The magnitude of the ratio of compression to decompression volume indicates that either the intake stroke has a bubble or that the eluent has a higher-than-normal gas content. Once a bubble has been detected, recovery is effected by forcing the pump into a very high stroke volume with the compression and decompression stroke limits constrained to obtain the largest delivery stroke compression ratio that will expel a bubble or solvent that has detrimental quantities of gas. |
申请公布号 |
AU3148697(A) |
申请公布日期 |
1998.01.05 |
申请号 |
AU19970031486 |
申请日期 |
1997.05.29 |
申请人 |
WATERS INVESTMENTS LIMITED |
发明人 |
STEVEN J. CIAVARANI;ROBERT J. DUMAS |
分类号 |
F04B49/10;F04B49/06;F04B53/06 |
主分类号 |
F04B49/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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