| 摘要 |
<p>The present invention concerns a beverage preparation machine (1) having a tank (2) for containing a food-grade fluid, said tank comprising:
(i) a reservoir body with side, bottom and top walls,
(ii) at least one filling opening,
(iii) at least one dispensing opening comprising a dispensing valve for establishing a fluid connecting between said machine and said tank,
said tank having a weight WE when less than 5% of its total volume is filled, and a weight WF when at least 5% of its total volume is filled with fluid, said valve being reciprocally movable between a first position where the tank has a weight WE and the valve is open and a second position where the tank has a weight WF and the valve is closed characterized in that said machine comprises a switch disposed in the vicinity of at least one wall of the tank (2), so that:
- when the tank has a weight W F said tank is in a first position so that it contacts said switch, and
- when the tank has a weight W E said tank is in a second position, away from said switch,
said machine further comprising a user warning means that is actuated when the switch does not contact the tank wall so as to warn the user that the tank needs a refill.</p> |
