Mysterious compressor device

Hi,

I found this mostly unmarked white plastic device, containing a dual-stage vacuum pump that appears to draw air through some sheets of waxy plastic/paper sheets. There is a coarse foam filter near the sheets, a cooling fan blowing on the pump, a control PCB with a few power devices and a pic16f54, and a small user interface with "Set and "On/Off" buttons, and three LEDs. The outlet is a ~4mm tube.

Any ideas what this is?

Cheers!

Any manufacturer/model on the bottom of the case?

Ken

No markings on the outside, other than the user interface. Inside, there are some codes on the PCB, e.g. DZYJ, and some component IDs. Pretty blank, unfortunately.

Just a coarse air filter???

The hose fitting on the end (picture 2) looks like one for a CPAP pump, or any other medical air patient hose.

Ken

dknguyen said:

Just a coarse air filter???

Click to expand...

There's a replaceable coarse foam pad on the outside of the device, presumably to catch large dust and lint. I assume that the waxy sheets that the compressor's sucking through provide finer filtration. It probably is just a compressor with air filter, like you said.

KMoffett said:

The hose fitting on the end (picture 2) looks like one for a CPAP pump, or any other medical air patient hose.

Click to expand...

The hose is tiny (like 4mm diameter), so I don't think it's a CPAP, but maybe a medical device; perhaps it's for a nebulizer or similar.

Well, that's kinda boring. The pump has a 3 phase motor with feedback, which is slightly more interesting though.

Thanks for your thoughts!

Possibly a Aquarium Pump??