Liquid feed device, liquid feed control method for liquid feed device, and liquid feed control program for liquid feed device
US10876525B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2015 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Sep 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/326
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid feeding apparatus includes: a plurality of plunger pumps fluidly connected in series or in parallel between a suction flow path and a discharge flow path; and a control unit configured to control an operation of the plunger pump. The control unit includes a compensation flow rate calculation unit configured to calculate a positive compensation flow rate which changes with time in synchronization with the period with respect to a set flow rate. The compensation flow rate is a flow rate which compensates for a loss of the flow rate caused by cooling and contraction in a discharge stroke after the fluid in the plunger pump is compressed and heated in a pre-compression stroke. The compensation flow rate calculation unit is configured to calculate the compensation flow rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.