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Does mini 12V DC diaphram water pumps like this get really hot after running for 5 min? (sh.itjust.works)

submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

16 comments fedilink hide all child comments

I'm trying to use it as a water pump for my aquarium. I'm using a 6V 4.5AH battery with a DC step up convertor to power the pump. After about 5 minutes it gets really hot. Is this expected?

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[–] [email protected] 12 points 6 months ago* (last edited 5 months ago) (2 children)

[–] [email protected] 3 points 6 months ago (1 children)

Actually I tried searching for it, but could not find the datasheet for it. This was given to me by a friend. I believe he bought it from AliExpress. As for current, I'll, measure it and let you know in a few days, I'm traveling right now.

[–] [email protected] 3 points 6 months ago* (last edited 5 months ago) (1 children)

[–] [email protected] 3 points 6 months ago

I found a similar product with some number on its side. But so far nothing is coming up. I'll keep searching.

[–] [email protected] 2 points 6 months ago* (last edited 6 months ago)

Deleted, accidental reply.

[–] [email protected] 5 points 6 months ago (1 children)

got a different model, but its getting pretty hot. maybe like 60-70°C
Screenshot_20240512-205825__01

[–] [email protected] 1 points 6 months ago (1 children)

So does it stay 60-70 C the whole time or does it go beyond that after a while ? Also, have you tried running it continously for like 20 or 30 minutes by any chance?

[–] [email protected] 1 points 6 months ago (1 children)

stays like this, even after several hours of running.

[–] [email protected] 1 points 6 months ago

Thanks

[–] [email protected] 5 points 6 months ago* (last edited 6 months ago) (1 children)

It was probably a marginal product deliberately overdriven beyond "good design norms" to make it look good for the currently-missing data sheet.

Put it on a variable voltage power supply, run it at 6v to 12v in one volt steps, and measure its output volume for ten seconds at each step.

You might find that you still have adequate flow for your situation at a lower, cooler, voltage.

[–] [email protected] 2 points 6 months ago* (last edited 6 months ago)

That's a good suggestion. Thanks, I'll try it out.

[–] [email protected] 3 points 6 months ago (1 children)

Yeah those things get quite warm. Did you check the data sheet? Also, make sure it's intended for a continuous runtime.

[–] [email protected] 3 points 6 months ago (1 children)

Actually I tried searching for it, but could not find the datasheet for it. This was given to me by a friend. I believe he bought it from AliExpress.

[–] [email protected] 2 points 6 months ago (1 children)

Right, that does make it a bit more tricky. Is there any serial number or manufacturer?

[–] [email protected] 1 points 6 months ago

I found something similar. I tried searching with the serial number but nothing came up.

[–] [email protected] 1 points 6 months ago

There are a lot of fast moving part with variable pressures and friction all around. All these things create heat.