US 11,773,987 B2
Flow modulator for a fluid
Clemens Metker, Bad Iburg (DE); Wim Munsterhuis, Dalen (NL); Gerrit Jan Baarda, Emmen (NL); Andreas Kammerahl, Lemfoerde (DE); Martin Petersmann, Osnabrueck (DE); Anton Quatmann, Vechta (DE); and Ulrich Oldehus, Lohne (DE)
Assigned to Pittway Sarl, Rolle (CH)
Filed by Pittway Sarl, Rolle (CH)
Filed on Sep. 9, 2020, as Appl. No. 17/15,740.
Claims priority of application No. 19197288 (EP), filed on Sep. 13, 2019.
Prior Publication US 2021/0080123 A1, Mar. 18, 2021
Int. Cl. F24D 19/10 (2006.01); F24D 5/00 (2022.01); F24D 19/00 (2006.01)
CPC F24D 19/1084 (2013.01) [F24D 5/00 (2013.01); F24D 19/0075 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A flow modulator comprising:
a housing;
a modulator body positioned with the housing,
wherein the modulator body has a flow channel and an opening providing together a flow passage for a fluid;
a valve body also positioned with the housing,
wherein the valve body is provided by a foil element,
wherein the foil element has an opening for the fluid;
wherein the foil element is rotatable relative to the modulator body to modulate a flow of the fluid by adjusting an overlap between the opening of the valve body and the flow passage of the modulator body,
wherein the foil element is positioned upstream of the modulator body such that an inlet pressure of the fluid presses the foil element against the modulator body thereby providing a sealing level between the foil element and the modulator body,
wherein the flow channel of the modulator body is provided by a bow-shaped nut within a sealing surface of the modulator body abutting a sealing surface of the foil element,
wherein the flow channel of the modulator body has a first end and a second end,
wherein the opening of the modulator body is provided at the second end of the flow channel,
wherein a width, a depth, or a combination of the width and the depth of the flow channel increases from the first end towards the opening of the modulator body, and
wherein the flow channel is partially confined by a raised contour of the modulator body providing the sealing surface of the modulator body.