Dyson Radial Root Cyclone Doesn't Work Very Well!

[alexhoovers94]

This is a picture of it again in natural light.

 

[marcusprit]

Yes that's more like it Alex nothing there to worry about. That is what mine looks like after a much longer period of time.

 

[dysonman1]

This started happening with both my DC41 and DC65 from day one. I know the high efficiency cyclones will never be 100% efficient. As airflow amounts change due to the tools used, and whether or not something (like a sofa cushion) is cutting off the airflow into the machine - the cyclone's efficiency changes. I knew fine dust would escape the cyclones and collect on the pre-motor filter.

What bothered me was the amount of fine dust on the outside of the filter, in the tube. I too, thought it was coming "around" the filter - but I now know that wasn't the case. The trap door on the bin has a large gasket. When the bin is emptied, the fine dust (from the fine dust collector) on the gasket is being pushed "up" into the tube. Static electricity, as well as a puff of air as the bin bottom is closed, puffs a bit of fine dust into the tube.

The problem is: as soon as the motor is started, this admittedly small amount of fine dust is inhaled into the motor. My DC65 and DC41's HEPA filters have dust on them when there normally would only be carbon residue.

I believe the fault lies in the fact that the airflow is coming from the bottom, not the top. This same thing happened with the Bissell Heavy Duty - the dust on the bin trap door seal got into the 'clean' air going into the motor.

The pictures are of my 2 year old DC41. The tremendous amount of fine dust that has escaped the cyclones is first. Second picture is of the seal on the bin trap door, showing how dangerously close the fine dust is to the motor's "clean" air intake. Third is of the fine dust collector - and how easy it is for this fine dust to find its way into the tube, as well as the motor's "clean" air intake.

 

[marcusprit]

I agree with you Tom you make some good points, dust will blow back up the tube when emptying the bin. I have found by using a very long bag this minimises the blow back. I get a little dust at the bottom but I wipe that away.
The cyclones are very good I don't think there's anything to worry about there.
The Cinetic cyclones have to be even more efficient as no pre motor filter.
There's a five year warranty so I'm not concerned about it.

 

[dysonman1]

To be fair, I use the DC41 every day (five days per week) to clean the rugs in the vestibule at the Factory where we make Simplicity and Riccar and Maytag vacuums. The gravel driveway and parking lot, plus in the winter all the ice melt salt, means the Dyson is picking up lots of fine dust. I have NOT washed the pre-motor filter yet - it simply doesn't appear dirty enough on the inside to warrant this. And the machine runs, at the most, 10 minutes per day.

I've decided to wipe off the gasket in the bin door, to see if that will help - each time I empty the cleaner.

Our country allows a vacuum to use up to 1200 watts (12 amps). I do own a number of European machines that use 240 volts. The suction was outstanding, but the motors sure sent out a lot of heat. Interesting that in two years, the maximum suction will be from a 900 watt motor in Europe, and we'll still have 1200 watt motors in the USA. How ironic.

As one of the first people in the USA to even know what a Dyson was, I got in huge arguments with vacuum "experts" on various forums for YEARS about Dyson. Not any more. Don't care enough to argue. It's a vacuum cleaner. I love Dyson cleaners, and am always happy to see improvements.

 

[dys0nb0y]

dysonman1 yours doesn't look that bad.doesn't really worry me that much as only a little bit and most of it will stay there due to the static.

 

[parwaz786]

So the Dyson cyclones do do their job after all, properly!

 

[dys0nb0y]

i know dyson have got their flaws like any vacuum but i gotta say they are very good and always improving and i know many people who are happy with their.and i'm going to order the kinetic later i love the fact it hasn't got a filter to wash.

 

[marcusprit]

The DC41 Mk2 is 700w over here.I get into arguments all the time haha silly isn't it I love Dyson cleaners too and Sebo, Miele and very impressed with the Riccar Brilliance.

 

[alexhoovers94]

"i'm going to order the kinetic later"

bet you have Dyson on speed dial, with mummys card at the ready!

 

[dys0nb0y]

my mum doesn't pay for anything for me i pay for all by myself and my own card can i save my money and i don't spend it.

 

[alexhoovers94]

well if your mother doesn't pay, then what, do you work? at 13/14?

 

[marcusprit]

Good for you Josh. Don't get into debt though.

 

[alexhoovers94]

Hang on you are like, what, 13? And you have a bank card?! I had a savings account at your age, that was it!

 

[dys0nb0y]

i clean a refurbished vacuums.you can make a lot of money actually doing it.i've been doing it for the last 5 years

 

[alexhoovers94]

Ahhh okay...

 

[marcusprit]

We have a little entrepreneur here

 

[alexhoovers94]

In want of a better word, Marcus...

 

[parwaz786]

Very nice! Josh you remind me of the school teenager who made LOADS AND LOADS of money selling sweets at school he got suspended. For it though! Stupid headteacher

 

[marcusprit]

Now now Alex

 

[alexhoovers94]

 

[alexhoovers94]

Now lets try that again with a BAGGED vacuum with EVEN MORE icing sugar!

 

[henrydreyfuss]

You hit the nail on the head, Dysonman

This is an issue that all current dyson ball uprights have, including the new Cinetic Big Ball. When dumping the bin, a small amount of dust cross-contaminates the clean air path (the tube in the center of the bin), which will then get pulled through the motor and onto the exhaust filters. That could be part of the reason why the Big Ball has 2 HEPA exhaust filters. The cordless models and canister Dysons do NOT have the same issue, because the suction from the motor into the cyclone pack doesn't start at the bottom of the bin where it's dumped, but instead the top, and the dust can't easily enter the clean air path. This is something I thought would have been addressed right after the DC41, but Dyson has released several similar models since, and the issue persists.

I got a very used DC41 a few months ago, and while the pre-motor filter was very clean, the exhaust filter was quite dirty, and with more than just carbon dust. Haven't seen that on a Dyson in a while!

The current Dyson uprights are better than ever in a lot of ways, but over the course of their lifetime, the new Dyson ball uprights will let a lot more dirt into the motor than most sealed vacuums. I hope it doesn't lead to premature motor issues.

 

[marcusprit]

As I've said before I use I very long bag that I empty the bin into and this reduces the dust blowing back up the tube. I get a little dust on the bottom of the tube but I wipe that away. Anyway there's a 5 year warranty so I'm not concerned. I'm very impressed with it

 

[alexhoovers94]

I am very impressed with mine but I think the way the cyclone is set up (suction coming from the bottom)is a flawed design and Dyson should quickly change it!

 

[marcusprit]

I think they did it that way for maximum airflow. But there's always improvements that can be made

 

[henrydreyfuss]

They definitely designed it for maximum airflow (which is excellent on new Dysons), and also to divide the work needed from the cyclones evenly. Having the suction go directly from the ball into the bin cuts back on extra ducting, saving weight and manufacturing costs, small as they may be.

 

[marcusprit]

Yes indeed.

 

[alexhoovers94]

well, originally it didn't matter whether the suction came from the top, as it was Dual Cyclone, so there was only one large cyclone the air was directed to.

 

[henrydreyfuss]

The DC07 and DC08 had extremely elaborate ducting for the root cyclones to try to spread the workload out evenly. On the DC14, the design was simplified tremendously, and was immediately stolen by other manufacturers once the multi-cyclonic patents expired.

Here's the DC08 cyclone manifold in all its rooted glory.[this post was last edited: 2/4/2015-15:07]