US 11,744,238 B2
Blower spray device
Jürg Zwahlen, Triesen (LI); Michael Zaugg, Aarau (CH); Harald Glenz, Salgesch (CH); Frank Rimpl, Sion (CH); and Sébastien Demont, Sion (CH)
Assigned to Birchmeier Sprühtechnik AG, Stetten (CH)
Appl. No. 16/606,641
Filed by BIRCHMEIER SPRÜHTECHNIK AG, Stetten (CH)
PCT Filed Apr. 19, 2018, PCT No. PCT/IB2018/052738
§ 371(c)(1), (2) Date Oct. 18, 2019,
PCT Pub. No. WO2018/193406, PCT Pub. Date Oct. 25, 2018.
Claims priority of application No. 00524/17 (CH), filed on Apr. 19, 2017.
Prior Publication US 2020/0054000 A1, Feb. 20, 2020
Int. Cl. A01M 7/00 (2006.01); B05B 7/00 (2006.01); B05B 12/18 (2018.01); B05B 7/24 (2006.01); B05B 12/00 (2018.01); B05B 13/00 (2006.01)
CPC A01M 7/0046 (2013.01) [A01M 7/0021 (2013.01); A01M 7/0035 (2013.01); B05B 7/0075 (2013.01); B05B 12/0026 (2018.08); B05B 12/18 (2018.02); B05B 13/005 (2013.01); B05B 7/2475 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A blower spray device, comprising: a housing which accommodates an electric blower having a blade wheel and a spray nozzle; and
a liquid supply line opening into the spray nozzle, the liquid supply line being in fluid communication with a pump configured to pressurize a fluid to be delivered as a spray mist emerging from the spray nozzle during operation of the electric blower, the pump being configured to adjust a pressure of the fluid for adjusting a spray quantity and a droplet size during operation of the electric blower;
wherein the housing comprises a funnel-shaped intake channel and a tubular blow-out channel arranged along a central longitudinal axis, the funnel-shaped intake channel including an air inlet and having a throughflow cross-section that tapers in a direction of flow through the funnel-shaped intake channel,
wherein the blade wheel of the electric blower is arranged downstream of the air inlet to receive a flow of air drawn through the air inlet by the electric blower during operation,
wherein guide vanes are provided in the tubular blow-out channel in the direction of flow downstream of the blade wheel, the guide vanes being designed and arranged in such a way that turbulences produced by the blade wheel merge into a uniform, swirl-free air flow in an axial direction,
wherein the spray nozzle is arranged concentrically within the tubular blow-out channel along the central longitudinal axis in the tubular blow-out channel in such a way that the swirl-free air flow receives the spray mist emerging from the spray nozzle during operation,
wherein an electrically actuated valve is provided in the liquid supply line in order to activate and deactivate a liquid supply to the spray nozzle, and
wherein an electronic controller is configured to vary an air flow velocity during the operation of the electric blower for transport of droplets in a spray mist generated by the nozzle in accordance with a respective application, the electronic controller being configured to vary the air flow velocity independently of the pressure provided by the pump.