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Trusted Lifetime subscriber
Trusted Lifetime subscriber
As an engineer, when you specify fan's / blowers, the process is (in theory) pretty easy. You pick a target flow rate, and work out the back pressure on the system. Then you go to fan / blower suppliers, and get them to send you fan curves (a plot of pressure vs flow rate), and pick one that will give the correct flow at your calculated back pressure.
Of course for consumer grade stuff, no body publishes a fan curve, so any selection is going to be a crap-shot. Normally the volume published (if any) is at zero back pressure, so meaningless for real world application's. If you are lucky they will publish an approx max pressure, but this is rare.
One key thing to be aware of is what your target inflation pressure is. (sorry about the imperial units)
The dirt cheap pump's will only really do sub 1psi stuff well. You really want something with a gauge to do the Medium pressure stuff too. Anything above 1.5PSI is kinda an tricky middle zone between low pressure (airbeds and toys) and high pressure (tires), but there is specialty stuff targeted at the inflatable SUP's and the likes
A major constraint of inflation speed is the size of the port of the device. Had one of those ornamental pool swans with the fittings that you put your mouth on for inflation (but was way to massive to do that way). One of the $20 high volume infiltrators was getting beaten by my 4x4 tire compressor (85L/min free flow, and 150psi max). Should be the other way around, but the resistance of getting the air through the little port was bogging down the $30 high flow inflator.
I would be cautious of that K-mart rechargeable blower for anything big. Batteries are 6V, 1500mAh, so only 9Wh of storage. If the motor consumes 30W (pretty puny), it will be drained in under 15mins. That said, at $20 is could be worth a shot.
Few options:
12V, external power:
Left field options:
Mike
Mike
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