US 12,220,605 B2
Method and liquid mixing system for providing a liquid mixture
Roland Jungmair, Buchkirchen (AT); and Hannes Hammer, Katsdorf (AT)
Assigned to Rosenbauer International AG, Leonding (AT)
Filed by Rosenbauer International AG, Leonding (AT)
Filed on Nov. 15, 2021, as Appl. No. 17/454,978.
Application 17/454,978 is a continuation of application No. PCT/AT2020/060227, filed on Jun. 5, 2020.
Claims priority of application No. A50514/2019 (AT), filed on Jun. 6, 2019.
Prior Publication US 2022/0072351 A1, Mar. 10, 2022
Int. Cl. A62C 5/00 (2006.01); A62C 5/02 (2006.01); A62C 27/00 (2006.01); B01F 25/00 (2022.01); B01F 25/312 (2022.01)
CPC A62C 5/002 (2013.01) [A62C 5/02 (2013.01); A62C 27/00 (2013.01); B01F 25/105 (2022.01); B01F 25/312 (2022.01)] 17 Claims
OG exemplary drawing
 
1. A method for providing a liquid mixture by mixing water with at least one additive using a liquid mixing system, comprising the following steps:
providing a first water reservoir with a first water held therein,
providing at least one first additive reservoir with a first additive held therein,
providing a mixing unit for admixing at least the first additive to the at least first water, the mixing unit comprising an additive flowmeter, an additive metering device and a mixing device,
providing a pump for conveying at least the first water from the first water reservoir to at least one discharge location,
providing a line network comprising:
a feed line, said feed line connecting the first water reservoir with the pump,
a first conveying line, said first conveying line connecting the pump with the at least one discharge location,
a second conveying line, said second conveying line branching off the first conveying line, being connected to the mixing device and further leading back to the pump on an entry side thereof,
an additive line, said additive line connecting the first additive reservoir with the additive metering device and further with the mixing device, and wherein the additive flowmeter is arranged between the first additive reservoir and the mixing device,
conveying the first water from the first water reservoir through the first conveying line to the at least one discharge location and further feeding a partial stream through the second conveying line to the mixing device, in which mixing device at least the first additive is admixed to the at least first water and the liquid mixture is fed to the pump on the entry side,
wherein:
at least one first measurement value of at least a flow of the first additive conveyed to the mixing device is determined by the additive flowmeter and the at least one first measurement value is transmitted to a controller,
a total stream of the liquid mixture conveyed to the at least one discharge location by the pump is measured by a liquid mixing flowmeter and at least one second measurement value of the total flow of the total stream of the liquid mixture conveyed to the at least one discharge location is transmitted to the controller,
the first and second measurement values are transmitted to a data storage device and stored therein,
a water flowmeter is provided and at least one third measurement value of water flowing through the feed line is determined by the water flowmeter and the at least one third measurement value is also transmitted to the controller, and the at least one third measurement value is also transmitted to the data storage device and is stored therein,
at least some of the first, second, and/or third measurement values are summarized in a measurement protocol, and
outputting the measurement protocol to an operator of the liquid mixing system.