公开(公告)号：US11959467B2

公开(公告)日：2024-04-16

申请号：US17063870

申请日：2020-10-06

Applicant: Christoph Strobl

Inventor： Christoph Strobl

IPC: F04B11/00 ,  G01N30/36 ,  G01N30/32 ,  G01N30/34

CPC classification number: F04B11/0058 ,  G01N30/36 ,  G01N2030/324 ,  G01N2030/326 ,  G01N30/34

Abstract: A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit. The fluctuations can occur as a result of the cooling of the liquid medium that is heated in an adiabatic manner during a pre-compression phase in the working piston. The control unit controls the piston speed of at least one piston-cylinder unit during the transition phase depending on at least one characteristic, which is ascertained from chronologically previously detected pressure values, such that variations of the system pressure as a result of the cooling of the adiabatically heated medium are at least partially compensated for.

公开(公告)号：US10801479B2

公开(公告)日：2020-10-13

申请号：US14239762

申请日：2012-07-02

Applicant: Christoph Strobl

Inventor： Christoph Strobl

IPC: F04B11/00 ,  G01N30/36 ,  G01N30/34 ,  G01N30/32

Abstract: A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit. The fluctuations can occur as a result of the cooling of the liquid medium that is heated in an adiabatic manner during a pre-compression phase in the working piston. The control unit controls the piston speed of at least one piston-cylinder unit during the transition phase depending on at least one characteristic, which is ascertained from chronologically previously detected pressure values, such that variations of the system pressure as a result of the cooling of the adiabatically heated medium are at least partially compensated for.

公开(公告)号：US20140193275A1

公开(公告)日：2014-07-10

申请号：US14239762

申请日：2012-07-02

Applicant: Christoph Strobl

Inventor： Christoph Strobl

IPC: F04B11/00

Abstract: A control device of a piston pump unit comprising at least two piston-cylinder units that operate in a phase-shifted manner for the purpose of liquid chromatography and to a piston pump unit is described. The control device corrects fluctuations of the system pressure while switching from one piston cylinder unit to the respective other piston cylinder unit. The fluctuations can occur as a result of the cooling of the liquid medium that is heated in an adiabatic manner during a pre-compression phase in the working piston. The control unit controls the piston speed of at least one piston-cylinder unit during the transition phase depending on at least one characteristic, which is ascertained from chronologically previously detected pressure values, such that variations of the system pressure as a result of the cooling of the adiabatically heated medium are at least partially compensated for.

Abstract translation: 描述了活塞泵单元的控制装置，其包括至少两个用于液相色谱和活塞泵单元的相移方式操作的活塞 - 气缸单元。 控制装置在从一个活塞缸单元切换到相应的其他活塞缸单元时校正系统压力的波动。 由于在工作活塞中的预压缩阶段期间以绝热方式加热的液体介质的冷却，可能会发生波动。 控制单元根据从时间上先前检测的压力值确定的至少一个特性来控制过渡阶段期间至少一个活塞 - 气缸单元的活塞速度，使得由于冷却而导致的系统压力的变化 绝热加热介质至少部分补偿。