In pl.misc.elektronika Janusz <j...@o...pl> wrote:

> Nie, to w zmywarce tak jest, w pralce woda krąży tylko kręcona bębnem,
> pompa tylko odpompywuje, widać to zresztą po zdjęciach wirnika i
> korpusu.

Znalazłem gdzie to widziałem:

https://home.howstuffworks.com/washer4.htm

The rest of the plumbing system, the part that recirculates the water and
the part that drains it, involves the pump.

In the picture above, you can see how the pump is hooked up. This pump is
actually two separate pumps in one: The bottom half of the pump is hooked
up to the drain line, while the top half recirculates the wash water. So
how does the pump decide whether to pump the water out the drain line or
back into the wash tub?

This is where one of the neat tricks of the washing machine comes in: The
motor that drives the pump can reverse direction. It spins one way when
the washer is running a wash cycle and recirculating the water; and it
spins the other way when the washer is doing a spin cycle and draining the
water.

Let's take a closer look at the pump: Pump

If you look carefully, you can see the vanes of the bottom layer of the
pump. When water enters the pump's inlet, these vanes, or fins, push the
water around and force it back out of the pump by way of the outlet. This
type of pump can operate in both directions -- which port is the inlet and
which is the outlet depends on which direction the pump is spinning in.

Take another look at the pump. If the pump spins clockwise, the bottom
pump sucks water from the bottom of the wash tub and forces it out the
drain hose, and the top pump tries to suck air from the top of the wash
tub and force it back up through the bottom, so that no water
recirculation takes place.

If the pump spins counter-clockwise, the top pump sucks water from the
bottom of the tub and pumps it back up to the top, and the bottom pump
tries to pump water from the drain hose back into the bottom of the tub.
There is actually a little bit of water in the drain hose, but the pump
doesn't have the power to force much of it back into the tub.

--
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- Ja! - wstaje zza stołu niedźwiedź. -A o co chodzi?
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