| 主权项 |
1. A differential flow-meter comprising a first separate channel and a second separate channel in which two fluids flow, said fluids being same or different;
said first channel comprising the following devices: first heating means of the fluid flowing in the first channel the amount of heat supplied by said first heating means being controlled by a differential measuring device; first temperature detecting means, placed close to said first heating means; the temperature of said first temperature detecting means being also detected by means of the differential measuring device; and said second channel comprising the following devices: second heating means of the fluid flowing in the second channel arrow; the amount of heat supplied by said second heating means being controlled by said differential measuring device; second temperature detecting means, placed close to said second heating means; the temperature of said second temperature detecting means being also detected by means of the differential measuring device; wherein said differential measuring device can transform the instantaneous temperatures detected by the temperature detecting means into differential flow rate or speed measurements of the two fluids passing in the two channels; and wherein said first temperature detecting means are integral to said first heating means in a first thermal device, and said second temperature detecting means are integral to said second heating means in a second thermal device. |
