terkio wrote: ↑
Tue Apr 21, 2020 2:12 pm
I understand the bottle contains pure product and the mix with high pressure water at some ratio is done near the bottle thanks to calibrated jets. Right ?
This is tricky hydrodynamics that makes me think of an injector.
Actually, I do not well understand, please give me a user manual with detailed picture and instructions. Thanks in advance.
Sorry I don't have a detailed explanation or diagrams, this is just a cheap hose end spray bottle.
The effect is similar to carburetor metering jets somewhat but not exactly.
The sprayer has a 10 position metering dial and a crude scale alteration that selects between teaspoons per gallon, and tablespoons per gallon.
The water flowing past an opening at high volume creates some suction (Venturi or Bernouli, or something like that effect). Restricting the air flowing back into the product bottle is probably used to meter the mix ratio.
All I know is that too much back pressure on the output, caused water to back up and out the air metering ports, that should have air going in them.
PS: I suspect there may be more hydrodynamics involved with the flow restricted first to a narrow passage that then expands at the outlet creating reduced pressure (suction).
It's nice to be nice.