| 摘要 |
A fluid flow control device comprises a housing having a fluid inlet (7) and at least one fluid outlet (8). A first fluid flow restrictor (1) serving as an inflow port to a chamber (B) in the housing, and a second fluid flow restrictor (2) serving as an outflow port from the chamber (B). The first fluid flow restrictor and the second fluid flow restrictor are configured to generate different fluid flow characteristics; and the chamber (B) comprises actuating means (5a-l) that is responsive to fluid pressure changes (ΔΡ2) in the chamber. The first fluid flow restrictor (1) and the second fluid flow restrictor (2) are configured to impose its respective different fluid flow characteristics based on different fluid properties. In use, the invented fluid flow control device may be used to control fluid flow (F) through the housing, by al lowing at least a portion (f) of the fluid to flow through a first fluid flow restrictor (1), into a chamber (B) and out of the chamber via a second fluid flow restrictor (2); and utilizing the pressure change (ΔΡ2) in the chamber that occurs when a property of the fluid changes to operate a valve device. |
