| 摘要 |
The present invention is about a universal device for checking the water level in steam boilers of household appliances, provided with a bulb thermostatic feeler (32) which allows to maintain almost constant the water level in the boiler (10) and thus the quantity and quality of produced steam, by intermittently activating for short intervals the cold water loading pump thanks to the intervention of an electric resistance (28) for preheating the water coming into the pump. |
