Blower spray device
AssigneeBirchmeier Spruhtechnik AG
InventorsJürg Zwahlen, Michael Zaugg, Harald Glenz, Frank Rimpl, Sébastien Demont
Life of this patent
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Abstract
A blower spray device is provided having a housing which comprises an electrically driven blower and a spray nozzle, and having a liquid supply line opening into the spray nozzle. The housing has a funnel-shaped intake channel and a tubular blow-out channel, and an electrical valve is provided in the liquid supply line to activate and deactivate the liquid supply to the spray nozzle. An electronic controller having a regulating unit for the electric blower is further provided to adjust the air flow velocity.
Claims17
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.
A method for producing a spray mist with a blower spray device including 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, wherein the housing includes 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 a 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 adjust an air flow velocity during operation of the electric blower in accordance with a respective application, and with a pump in fluid communication with the liquid supply line, the pump having a pressure control configured to adjust a pressure of the liquid supply during the operation of the electric blower, the method comprising:
- selecting a spray liquid for the respective application;
- selecting a spray nozzle with a specific spray angle and a specific drop size for the respective application from a selection of spray nozzles;
- subjecting the spray liquid to a pressure set for the respective application or selection via the pump;
- and
- setting the air flow velocity of the electric blower for the respective application.
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 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,
- wherein the housing comprises a funnel-shaped intake channel and a tubular blow-out channel arranged along a central longitudinal axis,
- wherein guide vanes are provided in the tubular blow-out channel in a direction of flow downstream of the blade wheel and are arranged in a circumferential array around a common axis about which the blade wheel rotates, 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 a 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 adjust an air flow velocity independently of operation of the pump, during operation of the electric blower, in accordance with a respective application.
Dependencies are inferred from the claim text.