| 摘要 |
<p>A device comprises a housing, a fluid conveying device, a thermally active unit, first, second, third temperature sensorsand a controller. The housing has fluid inlet and outlet, and includes the thermally active unit. The fluid conveying device is positioned to convey fluid within the housing. The first, second and third temperature sensors measure a first temperature of the thermally active unit, a temperature Tin of the fluid at the fluid inlet and a temperature Tout of the fluid at the fluid outlet respectively. The controller is communicatively coupled to the first, second and third temperature sensors, and calculates a heat loss of the thermally active unit and a stored thermal energy in the thermally active unit, and estimates an operational status of the thermally active unit based on the heat loss, the first temperature, the stored thermal energy, and the difference between the temperature Tin and the temperature Tout.</p> |
