| 摘要 |
<p>A fluid-blending system is provided herein for maintaining a constant pre-established ratio of two or more fluids through a common output conduit. The blender includes, in combination, an output conduit; at least first and second fluid supply chambers, each having an outlet orifice coupled in common with said output conduit, the ratio of the sizes of said outlet orifices establishing the ratio of fluids in the output conduit of the blender, and each of said chambers having an inlet orifice for connection with a supply of fluid; first and second valve means biased for normally closing said first and second inlet orifices, respectively and capable of opening in various amounts to permit varying amounts of fluid to pass therethrough; and first and second valve control means mounted in said first and second chambers, respectively, said valve control means responsive to fluid demand in said output conduit and coupled with said first and second valve means, respectively, for controlling the amount of opening thereof in accordance with such fluid demand.. The operation of the diaphragms is such as to maintain the same absolute pressure in each of the fluid supply chambers, so that the blender system is unaffected by variations or differences in the head pressures of fluids supplied to the chambers.</p> |
