Water flowmeter, esp. for electric throughflow heater - has rotation body with vanes and revolution rate detector giving uniform dependency of rotation rate on flow speed

摘要

The water flowmeter contains a rotation body in a housing. The rotation body (21) is exposed to the flow of water and its rate of rotation is detected. The body has a number of peripheral vane-shaped pins (26,27) with an area opposing the flow of water which is substantially smaller than the flow cross-section of the housing (17). The pins are mounted in two planes (E,F) in which they are mutually relatively offset. The pins are of oval or circular cross-section and have rounded attached to the rotation body so as to turn with it. ADVANTAGE - Reduced noise, minimum stopping time when water flow ceases.