Title:
GAS CONCENTRATION FLOW RATE MEASURING DEVICE AND OXYGEN CONCENTRATOR
Document Type and Number:
Japanese Patent JP2021188982
Kind Code:
A
Abstract:
To provide a gas concentration flow rate measuring device, etc., with which it is possible to compacting the size while securing measurement accuracy.SOLUTION: The gas concentration flow rate measuring device comprises: a measurement unit 20 for forming a measurement path in which a gas circulates; a pair of ultrasonic sensors 60 arranged upstream and downstream of the measurement path, respectively; a proportional valve 80 for adjusting the flow rate of a gas circulating in the measurement path; a temperature sensor 30 for measuring the temperature of the gas circulating in the measurement path; a computation control device for calculating the flow rate of a gas and the concentration of a specific component in the gas; and a device board 50 having a device board pattern for at least electrically connecting the proportional valve 80 and the ultrasonic sensor 60 and supporting the proportional valve 80 and the measurement unit 20. The proportional valve 80 is mounted on the device board 50, and open holes 54 penetrating the device board 50 in the thickness direction are formed around the proportional valve 80.SELECTED DRAWING: Figure 6
Inventors:
HONDA SHIGERU
MIZOTA IWAO
KAMIYAMA YOSHIHIRO
TAKEUCHI MASAHIKO
MIZOTA IWAO
KAMIYAMA YOSHIHIRO
TAKEUCHI MASAHIKO
Application Number:
JP2020093012A
Publication Date:
December 13, 2021
Filing Date:
May 28, 2020
Export Citation:
Assignee:
BREATH TECH CO LTD
International Classes:
G01F1/66; A61M16/10; G01N29/024
Attorney, Agent or Firm:
Masashi Sahara
Kazuki Yokota
Kazuki Yokota