13-04-2025, 03:20 PM
(This post was last modified: 13-04-2025, 03:26 PM by Radio Fixer.)
Not been doing much in the workshop as the weather has been so good its a pleasure to get outdoors. But a neighbour brought this pump over to me which he said was working but the fan wouldnt stop running even when device was switched off !
This excellent thread shows iit off, with descriptio,n and whats inside better then my pics:
Airbank D13 Puffer Pro Pump Teardown (Electronics) — Kaspars Dambis
Here are my pics:
The posted pump, by Kasper, does not show the tiny fan in mine or mention it so maybe a later model fitment. Its so tiny I could likely blow harder ... but not for so long.
Kasper makes the point that these Lithium battery packs pack a punch and the cased up unit gets pretty hot. Sonewhere else I picked up that it should not be run for more than 30 mins. "...but the case gets too hot to touch". Care obviously needs to be taken as we have all seen on TV, battery packs catching fire.
But back to the fan. Its likely the driver transistor or fet has gone short and with SMD no chance of me finding that or replacing it. A partial fix is to wire it in parallel wih one of the pump motors and I went for the first stage as opperating out of the case, on the bench, I couldnt get the second stage piston one to run; no current drawn. Not having the opperating instructions I was not sure if there is a button sequence to press?
Of course the fan would not run during battery charging but care should be taken with that It i was me I would charge via a timer for short periods.
These motors take a lot of power, I measured over 6 amps for the first stage one ! So the driver having to cope with another 120 mA of the fan should be no bother.
The devices that control the fans are probably Mos Fets (never used by me) with their low voltage drop (0.1 V). It did amaze me that SMD, so small could handle these currents.
Hope this has been interested ...
Gary
he air connectors).”
This excellent thread shows iit off, with descriptio,n and whats inside better then my pics:
Airbank D13 Puffer Pro Pump Teardown (Electronics) — Kaspars Dambis
Here are my pics:
The posted pump, by Kasper, does not show the tiny fan in mine or mention it so maybe a later model fitment. Its so tiny I could likely blow harder ... but not for so long.
Kasper makes the point that these Lithium battery packs pack a punch and the cased up unit gets pretty hot. Sonewhere else I picked up that it should not be run for more than 30 mins. "...but the case gets too hot to touch". Care obviously needs to be taken as we have all seen on TV, battery packs catching fire.
But back to the fan. Its likely the driver transistor or fet has gone short and with SMD no chance of me finding that or replacing it. A partial fix is to wire it in parallel wih one of the pump motors and I went for the first stage as opperating out of the case, on the bench, I couldnt get the second stage piston one to run; no current drawn. Not having the opperating instructions I was not sure if there is a button sequence to press?
Of course the fan would not run during battery charging but care should be taken with that It i was me I would charge via a timer for short periods.
These motors take a lot of power, I measured over 6 amps for the first stage one ! So the driver having to cope with another 120 mA of the fan should be no bother.
The devices that control the fans are probably Mos Fets (never used by me) with their low voltage drop (0.1 V). It did amaze me that SMD, so small could handle these currents.
Hope this has been interested ...
Gary
he air connectors).”
