| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure loss measuring apparatus of a filter for stably and conveniently measuring the pressure loss of the filter, at an arbitrary fixed flow rate. SOLUTION: The pressure loss measuring apparatus 1 of the filter 2 is provided with a filter-holding means 3, a fluid-transmitting means, a flow rate measuring means, a pressure loss measuring means, a flow path 6 for mutually coupling four means so as to transmit a fluid through them, a branch path 8 branched from the a main flow path 7 and connected to the outside, and a flow rate regulating means, having one or more flow path opening and closing members 9 for opening and closing the main flow path 7, and the branch path 8 so as to continuously or intermittently change their flow path open area ratios, in cooperation with the flow rate value of the fluid measured by the flow rate measuring means. The pressure loss, which can be measured as the fixed flow rate of the fluid transmitted through the filter 2, is maintained by the flow rate regulating means. COPYRIGHT: (C)2005,JPO&NCIPI
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