摘要 |
A reservoir for holding a quantity of fluid within a tank, the reservoir including a first resistive element for heating a first part of the tank and a second resistive element for heating a second part of the tank, the second resistive element having a positive temperature coefficient. The reservoir further includes a third resistive element for heating the second part of the tank, the second resistive element and the third resistive element forming a parallel circuit, and the first resistive element being connected in series with the parallel circuit. |