Patent ID: 9702746
Date: 2017-07-11
CPC Classifications: A62B,G01F

Claim:
1. A device for monitoring a mass or volume flow of a gas stream, the device comprising: a feed line; a plurality of electrical components comprising at least one flow generator, a heat-sensitive element and a data processing unit, wherein: the flow generator is arranged and set up such that the flow generator generates a gas stream flowing in a first direction of flow through the feed line and the flow generator comprises a motor with a plurality of electrical elements in the form of protective resistors; the plurality of electrical elements are arranged in front of the heat-sensitive element in the feed line with respect to the first direction of flow; the heat-sensitive element is arranged behind the electrical elements in the feed line with respect to the first direction of flow; waste heat of the plurality of electrical elements heats the gas stream generated by the flow generator; the heat-sensitive element is set up to detect a temperature of the gas stream generated by the flow generator and heated by the waste heat of the electrical elements; and the data processing unit is set up to determine a mass or volume flow of the gas stream from the temperature detected by the heat-sensitive element.