Ultrasonic Fog Chiller- WYE Fitting Experiment/Fail #2 

It won't make a difference because this is not a complete venturi setup. I had seen people talk about adding a wye to create one and never saw that there have to be modifications made to the wye for it to work. An inner, funnel shaped extension that extends past the side piece needs to be added to the straight side where the blower is. This is what creates the suction. A plain ole wye fitting will never work as-is no matter how it is hooked up. I'm going to get back to this project eventually and maybe even 3d print an insert that will do the trick.

Yep! I replace mine each year. I can usually find one for under $20 on Amazon. Another commenter suggested drenching the innards of the blower with wd40 before storage, which might just be crazy enough to work. Pretty sure the failure happens in storage when the fan is not turning and all of that remaining moisture starts to corrode and rust up the motor and shaft. I just like to tinker sometimes to see if I can make an improvement.

YES! I was trying to visualize what someone else had told me, but the photos explained it much better! Thank you!

They type of wye won't matter. The air won't create a vacuum in the side piece without having an insert in there to funnel the air past the side opening to create a venturi.

Turning the fan off and on would probably not be ideal. As it normally runs using a bilge blower hooked up inline and dialed down very low a 10 second blast of fog will turn into a nearly 2 minute steady flow of super low fog. I feel like switching it on and off would most certainly ruin that. If I can't at least get that performance out of an alternative setup I'm not going to change it. Putting air back into the box would only serve to create even more back pressure. Air needs to be slowly pulled out of the box to create a slight negative pressure.

Yes. I wanted to try using it since it has a higher speed. Thought maybe it might create some pull better. It didn't. A bilge blower will be arriving tomorrow and I'm abandoning further experiments until after Halloween. I've wasted enough money messing with this.

The normal configuration is a straight pipe with the blower attached to pull fog from the box. This was just an experiment to see if I can get the blower away from all of the moisture.

@@OakLaneCemetery ive been following you for a good bit! ive seen your upgrades i want to see it succeed so i can build the same lmao

Probably won't work. There will be condensation from the fog that collects in the lines and pretty quickly fills them. Also the lines and heads are probably too small to allow enough airflow to move the fog very well. What you can do it to run the sprinklers for a few minutes before turning on your fog effects. The wet grass really helps the fog to stick to the ground better.

It's not causing any because internally it's not right. I've been informed I need to add an internal pipe to extend the air inlet side a bit past the fog inlet side until it starts creating a vacuum.

@@OakLaneCemetery that's correct.

That's what I was wondering as well, if a Tee would work better than a Wye fitting to achieve the venturi effect. @Oak Lane I hadn't heard about elongation the tube to create a better vacuum, but makes sense after thinking about it.

Yes, fan is definitely in the right direction. I've been told that I need to add an internal pipe to extend the air inlet a bit past the fog inlet until it starts creating a vacuum.

@@OakLaneCemetery i have the same fan... other than possible corrosion, what are you hoping to achieve with this. It works with just an in-line fan with no "Y" joint, right? What's the point of adding more air even if you get it to work? I get the venturi effect for the fog machine itself... but I don't see what this will do.

​@OakLaneCemetery ok... went back and watched your first video fail. Now I understand what you are trying to do. I'm using an ice chiller, not ultrasonic. You could try duct hose instead of the rubber couplers. Basically when you narrow down the path through the fan, the flow is faster you could also add some small holes in the duct between the mister and the fan. It will reduce the suction from the mister and pull in some extra air. On the other side (fog exit from corrugated pipe) you can also either make holes bigger or make more holes... that will also slow down the fog flow.

Or extend the length of your corrugated pipe. Hope it works.. interested to see this do what you want.

@@OakLaneCemetery similar to a dredge style pump. The high pressure 'nozzle" tube is centered in the pipe and extends....pointing 'downstream'.

Don't do this. Misters work best with room temp water and ice will damage the heads