JPS55114912A - Gas weight flow quantity measuring unit - Google Patents
Gas weight flow quantity measuring unitInfo
- 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
Links
Landscapes
- 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
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) |
-
1979
- 1979-02-27 JP JP2266579A patent/JPS55114912A/en active Pending
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