MadModder

The Shop => Metal Stuff => Topic started by: NeoTech on November 16, 2013, 08:14:36 AM

Title: Ventuuri effect "pistol".
Post by: NeoTech on November 16, 2013, 08:14:36 AM

So i found this.

(http://www.jula.se/mediaarchive/6161187/zoom/074414-jpg.jpg)

Which is basicly a ventuuri "handgun".. that is supposed to dry pain on walls or something, utilising pressurized air to create the effect.... I figure this should make a neat addition to the air intake for a gasforge or wasteoil burner.. Instead of a fan that is.

Title: Re: Ventuuri effect "pistol".
Post by: awemawson on November 16, 2013, 08:17:59 AM

There are industrial vacuum cleaners for wet areas that use that principle to avoid having electricity in the vicinity.

Andrew

Title: Re: Ventuuri effect "pistol".
Post by: Arbalist on November 16, 2013, 01:12:36 PM

Should work fine instead of a fan.

Title: Re: Ventuuri effect "pistol".
Post by: Pete W. on November 16, 2013, 05:54:59 PM

Quote from: Arbalist on November 16, 2013, 01:12:36 PM

Should work fine instead of a fan.

Do you mean like to move hot air from the roof-space of a workshop down to the occupant's level?   :bugeye:   :bugeye:   :bugeye: 

Do you think, patent-wise, this is a distant cousin of the Dyson fan, the one with the hole in the middle?   :thumbup:   :thumbup:   :thumbup: 

Title: Re: Ventuuri effect "pistol".
Post by: awemawson on November 17, 2013, 03:15:52 AM

I suspect that they use quite a bit of compressed air to be effective  :(

Andrew

Title: Re: Ventuuri effect "pistol".
Post by: PekkaNF on November 17, 2013, 03:57:45 AM

We use them in industrial scale. They were around way before this Dyson character.

They are called air movers, we use much Brauer.
http://www.brauer.co.uk/standard-fixed-gap-s386.aspx

I hate the touch.pad. Just deleted a long story.....

They are pretty handy if you require a small lightweight unit that you put next to use point. They need careful design and dimensioning. Poor economics on continuous use. You need to consider pressure ratio, but if you need hits the curve they work.

They are great if you need small scale underpressure or you have allready a good compressed air system and you need intermitently some means of moving air (under pressure).

Just one thing. They are very particular about the "cap" they look very simple and there might be a urge to see what it ate.

PekkaNF

Title: Re: Ventuuri effect "pistol".
Post by: BenH on November 17, 2013, 07:51:16 AM

I've used a little Devilbiss one like that for the odd drying of waterbased automotive paint, the certainly shift some air in use. But they do need a fair few cfm to operate effectively, a small boiler fan would be cheaper to run than a big compressor by far.

But that would be a interesting project none the less.