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Helix3D

Desktop Bladeless Fan

by Helix3D Jun 25, 2016
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Has anyone thought to try a petlier cooler fan in one of these?

Hi Helix3D, thanks for taking the time to share theses designs with everyone! I'm currently printing the V2 of this and was wondering how much power it needs in Amps?

Hi Sylvain, I never measured the power consumption. My guess would be not more than 2A at 12V.

Comments deleted.

Hi! I'm printing this (4 out of 5 parts already) and i'm now digging into 140mm fans. I've found a Noctua NF-A14 Industrial PPC-2000 PWM at a local store at good price because is an outlet and comes without its box. This is more an electronic question but surely you know more than me, it comes with 4 pins and I'm planning on only use the red and black wires, as far as i've investigated the other two are for rpm count and the PWM. Am i missing something? I mean, just plugging the red and black wires should get the fan working at full speed, right? I'd like to do this 'cause it is the only one i've found with more than 1100 rpm.

Hi Elcucarach4,
If the fan has 4 wires, the wires other than black and red are most likely the sense and control wires. Connecting the black and red wire to power will probably work. If you want to control the speed, you can use a simple 2-wire pwm-controller.

Everyone thinks the big secret is in the aerodynamic duct. It also counts, but it does not use a fan for quiet, strong air flow, but turbine. Look at the Dyson videos. Helix3D has published one such thing and has been banned. So a smooth fan does not make the right flow to start air multiplication. There is not enough air and low pressure. So you're better off controlling your PC fan.
Everyone also ignores the importance of aerodynamics in the smoothness of the surface. During printing, grooves are created which, when crossed, slow down the flow of air with micro turbulence. Anyway, the weak airflow is further weakened. (Dyson does not accidentally shine)

Take these into account before wasting plastic.

Your arguments are correct, but purely based on fluid dynamics theory. The airduct is what makes half of this thing work, if not more. Converts high pressure, low flow into low pressure, high flow and causes more air around it to be moved by bernoulli's principle. But yes, it needs a fan with higher pressure. Based on Ra< 80, the 'smoothness of the surface' doesn't make a lot of difference in practice. And after all, it's still a fan, not a rocket. Also, Dyson marketing videos are pure marketing w**k...
Please don't make false claims before even having tried.

I'm just saying that the loss of a weak axial fan is only increased by this design. The air slows down a long way and the weak airflow is dissipated in the circle. Most people expect this design to increase the airflow of the small PC cooling fan. Well not really. To get more performance. (The wing of the aircraft also begins to generate a buoyant force just above a certain speed)

So I'm saying that building something like that with a powerful blower and a quiet engine, you really want a good result.

For those with a PC fan, it's better to make a foot and direct it to yourself.

The sense of this is to be affordable if you want to throw out 400 to 500 bucks for a simple brushless Motor with a cheap Plastic Fan part and a super Fancy highgloss but also cheap plastic casing, where at least 80% of the Price goes in those awful minimalistic and overgloryfiing Commercials, then do it, Because with a highflow 140mm Fan it works Pretty decent. Such a Highend Fan costs a little bit more than one of those cheap standart fans, but the whole asembly costs even then way less than 100 bucks and not 400ish fucking Dollars. And as Helix said before, you overrestimate the smoothness of the surface totaly, in some cases this groves can even improve the Airflow, because they can acting in a similar way like Sharkskin.

Do you really think anybody here expects a result as nearly as the genuine Dyson fan??? You are commenting on every bladeless fan design posted here and paste the same text.

It is mostly fascinating to print an aesthetic looking fan housing with an inspired principle of the Dyson fan. Of course with more or less effectivity. 3D printing is often a proof to clever designs which e.g. could be printed from one piece. If we would expect perfect products without the typical printing lines - we would probably buy glossy products.

I respect your efforts in getting people noticed about wasting plastic to poorly designed and often misfunctional designs but I think this is just maybe your personal unfullfilled expectation on these bladeless fan designs.

Just my 2 cents...

Or he/she/it works at Dyson...

Comments deleted.

Hi Arthur,
Please direct message me.

Hello! Great design! I have a printer that will print up to 400mm high. Do you have a model that has the entire top part of the assembly as one piece? Would you recommend printing it as one piece if the printer is able?

You could technically print it as one piece, but it'll need a lot of support material. If you want I can stitch it together as one piece.

That would be fantastic!! I’d really appreciate that.

Wow! Thank you very much. That was generous of you. I’ll post a picture when it’s printed. I already did the base

Hello mate hope you are doing well,Merry Christmas and Happy New Year. Just wondering if you are going to make the Dyson hair dryer in the future ?

Happy new year. The hair dryer will be a challenge with the heating element and motor, but I might look into it. Don't want James to sue me

Is it possible increase to 200mm fan? What scale do I use? Will be more powerfully?

Scale would be 20/14 ≈ 1.429. I don't know if it will be more powerful. Volumetric flow rate will be higher, but pressure will be lower.

can you make a vibration damper for the fan. it's too loud. Thanks

Have you tried putting adhesive rubber pads underneath the housing?

I want to use his with a 120mm fan, but I am unsure what number to put in to scale it down to that. At 100% scale (as downloaded) it says 1 in the X,Y,Z scale boxes to scale it down to a 120m fan what should i change that number to>

120/140 (0.85714)

I have a fan thats 80mm. How do i have to resize the model for it?

Scaling to (8/14) doesn't give nice results. I'm afraid you can't scale this for an 80mm fan. However, 120mm is doable and these fans are widely available.

Really nice design.
I seem to have a problem regarding the airflow. It seems that most of the air comes back out at the bottom. Any idea why that is the case?
The fan is installed in the right direction and the size is 140mm

Im with you on this one. i am using a static pressure Corsair 140 mm 100 CFM fan but about 20+% of my air flow just blows out the bottom of the thing not sure if this is due to to much air pushing back on the fan or what. might try to run silicon around the edging of the fan to see if it helps. but another thing that is a fight is cable management with the thing. the bottom seems to need to be a tad wider around the brim to allow cabling to be run around and under the fan but that's just minor complaints lol. works pretty well other than that :) .

Try a "static pressure" fan.

Needs a spot for some type of LED switch and a potentiometer to act like a PWM. Beggars can't be choosers :P.

Awesome design. I was wondering what software do you use to do the fluid calculation (nice tornado on the fourth screenshot). Thanks !

I used Solidworks Simulation

Looks like a really nice design! I like the use of the 140mm fan over a 120mm fan just for the fact it will push more air. I'll defenitly be printing this in the future! Just an FIY when users are shopping around for a fan for this, try to look for a fan with high static pressure. This will really make a good improvement on air flow since the fan has to push air through a duct.

Hi there,
I have a fan thats like 15.5 CM (155 MM). How would I resize the model for it?

Hi Johnnya101,
X/Y: (31/28) ≈ 1.1071
Z: [your fan's height] / 25

Hi,
Nice design! I tried to scale it down for a 80mm fan with absolutely no luck on the results (the breeze is very little). Is there modifications I could make to actually get it working at this scale ?

Hi aemaeth2501,
Scaling to (8/14) indeed doesn't give nice results. I'm afraid you cant scale this for an 80mm fan. However, 120mm is doable and these fans are widely available.

Thanks for the confirmation :)
I will have to cut apart again ^^ my printer is not big enough for 120mm fan

Hi aemaeth2501,
I can make the parts into multiple pieces if you want, so they'll fit on your buildplate. Let me know.

Hi !

That is kind. I will cut them though, to be able to make a cut faciliting assembly (male/female cut shape).

Nice design !!

140mm PC fan is really hard to find.. Do you have plan to scale it down for using 120mm

Most slicers have a scale function, scale it to (6/7) and it will fit. I dont know about the aerodynamics though.
If you need a proper version for 120mm, let me know.

Would be nice with a 120mm version... got a stack of those but no 140 mm :)

Hi NoReflexness,
Scaling top (6/7) works but the airflow is very low on a lot of 120mm fans.

Ok I'll go for the v2 then

What's the CFM on this?

Depends a lot on the fan. With an average fan I think it's around 3000 litre/minute.

Hello
great project, I really like the idea of fans dyson
I seem to recognize solidworks flowsimulation
Could you upload "lowerhalf + straighpiece + upperhalf" in one single file?
could we have the STEP file format?
congratulation for modeling