JPS55114912A - Gas weight flow quantity measuring unit - Google Patents

Gas weight flow quantity measuring unit

Info

Publication number
JPS55114912A
JPS55114912A JP2266579A JP2266579A JPS55114912A JP S55114912 A JPS55114912 A JP S55114912A JP 2266579 A JP2266579 A JP 2266579A JP 2266579 A JP2266579 A JP 2266579A JP S55114912 A JPS55114912 A JP S55114912A
Authority
JP
Japan
Prior art keywords
valve
pressure
flow quantity
air flow
pressure difference
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2266579A
Other languages
Japanese (ja)
Inventor
Kei Kimata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Toyo Bearing Co Ltd filed Critical NTN Toyo Bearing Co Ltd
Priority to JP2266579A priority Critical patent/JPS55114912A/en
Publication of JPS55114912A publication Critical patent/JPS55114912A/en
Pending legal-status Critical Current

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  • Measuring Volume Flow (AREA)

Abstract

PURPOSE: To improve the measure precision of fluid by restraining low the difference between the pressure before an air flow quantity detection valve and the pressure after this valve and by increasing this pressure difference several times and by causing this increased pressure difference to act on the pressure difference detection diaphragm of an amplification unit.
CONSTITUTION: Upper stream-side pressure Pa1 of air flow quantity detection valve 2 is led into rooms A and D of amplification unit 5, and pressure Pa3 of the narrowest part of Venturi tube 21 arranged on the flow path which bypasses air flow quantity detection valve 2 is led into room B. Pressure difference detection diaphragm 6 detects difference α, which is increased α times, between the pressure before air flow quantity detection valve 2 and the pressure after this valve 2 due to the use of Venturi tube 21; and when pressure difference Pa1-Pa2 is shifted from a prescribed value, diaphragm 6 displaces valve 10 to change opening of variable orifice 8. Thus, the air flow quantity flowed to valve 2 and the opening area of valve 2 are proportional to each other by keeping always pressure difference Pa1 -Pa2 constant, so that the air flow quantity can be detected from the opening area of valve 2.
COPYRIGHT: (C)1980,JPO&Japio
JP2266579A 1979-02-27 1979-02-27 Gas weight flow quantity measuring unit Pending JPS55114912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2266579A JPS55114912A (en) 1979-02-27 1979-02-27 Gas weight flow quantity measuring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2266579A JPS55114912A (en) 1979-02-27 1979-02-27 Gas weight flow quantity measuring unit

Publications (1)

Publication Number Publication Date
JPS55114912A true JPS55114912A (en) 1980-09-04

Family

ID=12089137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2266579A Pending JPS55114912A (en) 1979-02-27 1979-02-27 Gas weight flow quantity measuring unit

Country Status (1)

Country Link
JP (1) JPS55114912A (en)

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