Solved

China bladeless fan : comment on quality & blowing strength & noise level

Posted on 2016-11-20
4
126 Views
Last Modified: 2017-01-05
https://wholesaler.alibaba.com/product-detail/bladeless-fan_60293379192.html?spm=a2700.7782932.1998701000.1.IKa5L8

https://www.aliexpress.com/item/New-Design-Bladeless-fan-Electrical-No-Blade-Fan-Home-Appliance-electric-fan-cooling-only-AC220V/32706039409.html?spm=2114.40010208.4.9.ioIn4a

I'm contemplating Dyson's alternatives & looking at the above 2 items.

Q1:
For the top item, it says Supply Air Rate is 30L/S  while output is 450L/S (I presume L/s
means litres/sec) : how is it possible that input is not equal output ?  From physics
point of view, they should be the same, isn't it

Q2:
are the 2 items above the same item?  Bottom item did not indicate the measurement
/diameter of the fan

Q3:
Any tried them before & can comment on these bladeless fan's quality (breakdowns,
noise level ie should be quiet enough not to disturb sleep at night & the air flow could
reach say 4 meters away at top speed?)
0
Comment
Question by:sunhux
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 56

Accepted Solution

by:
andyalder earned 500 total points
ID: 41895038
A1: Presumably 30L/s air is pumped into the ring and shoots out of the circular blade. This airflow pulls surrounding air along with it which creates a vacuum in the middle of the ring that pulls more air through the open ring. So 420L/s is drawn from the back to the front by the 30L/s that gets pumped through the ring. (I don't know if L/s is litres per second either but that's the principle behind a bladeless fan whatever the units, It's similar to the venturi blower except that uses compressed air at a higher pressure. In the drawing at http://www.ciecompany.com/venturi_air_blowers.htm the 420L/s is represented by the 3 arrows going through the back of the device.

I cn't help on Q2 and Q3.
0
 

Author Comment

by:sunhux
ID: 41895776
Thanks Andy.

Found a similar looking fan in amazon: many bad comments about it esp
the breakdowns, DoA & the noise level :
https://www.amazon.com/Bladeless-Fan-Adjustable-Multispeed-Mountable/dp/B008CVETUQ/ref=pd_rhf_yaod_p_img_7?_encoding=UTF8&psc=1&refRID=GZ7JZ0T9Z7XBZ6Z1D1M0#customerReviews

Probably I go with Lasco bladeless fan : tho it can't mount on wall, I probably can do a shelf to
let Lasko stand on it
0
 

Author Comment

by:sunhux
ID: 41895782
One last question:

For US-based electronics which use 110V, there are adaptors to use them in UK's 220V.
I got one such adaptor & the adaptor get so heated up (boiling water's point) ; is this
an adaptor issue or the electronic device issue?  Worried it will damage the device or
adaptor may explode

Would getting better quality adaptors help?
0
 
LVL 56

Assisted Solution

by:andyalder
andyalder earned 500 total points
ID: 41895784
I wouldnt trust an adapter, a transformer would be better but a lot biggerand more expensive.
0

Featured Post

Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

pc, laptop  monitor connection configurations
This article shows how to use a free utility called 'Parkdale' to easily test the performance and benchmark any Hard Drive(s) installed in your computer. We also look at RAM Disks and their speed comparisons.
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…
Suggested Courses

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question