There may be pipes running underneath them floorboards. Could be flux on pipes , that has corroded through & possibly caused a pin hole & water may be spraying up to your carpet. I've seen that a few times.

一个地板下radiaror管很可能是原因。Lift the carpet back and try get a couple of floor boards up to have a look. If it is a radiator pipe. You will need to drain the system and get the pipe repaired. This should be a matter of urgency as you dont want a constant flow of water as ceiling and joists erc will get destroyed.

Hi,
Its best to take carpet up have a look ,in most cases under lay can soak up water without showing on carpet for a while. A major leak would show through ceiling below ?
Thks

It is properly a leaking joint spraying up onto the floor boards and seeping into the carpet. But it will also fall on the ceiling below and could ether evaporate or run to the edge of the ceiling and run down the inside of the wall witch you can’t see. Carpet and floorboards up to check.