US 12,453,988 B2
System and method to clean a range exhaust
Kyle Haugen, Eagan, MN (US); and Jason Platz, Mendota Heights, MN (US)
Assigned to Restaurant Technologies, Inc., Mendota Heights, MN (US)
Filed by Restaurant Technologies, Inc., Mendota Heights, MN (US)
Filed on Jan. 13, 2023, as Appl. No. 18/096,745.
Prior Publication US 2024/0238847 A1, Jul. 18, 2024
Int. Cl. B08B 3/02 (2006.01); B08B 3/08 (2006.01); B08B 9/032 (2006.01); B08B 13/00 (2006.01); F24C 15/20 (2006.01)
CPC B08B 3/02 (2013.01) [B08B 3/08 (2013.01); B08B 9/0325 (2013.01); B08B 13/00 (2013.01); F24C 15/2057 (2013.01); B08B 2203/0217 (2013.01); B08B 2209/032 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A system, comprising:
a plurality of nozzles coupled to a hood conduit and arranged to spray at least a hood zone of a cooking range exhaust system with a first cleaning solution;
a waste conduit configured to receive the sprayed first cleaning solution from the hood zone as runoff and provide the runoff from the cooking range exhaust system to a drain;
a waste conduit cleaning conduit arranged downstream of the plurality of nozzles and configured to dispense a second cleaning solution into the waste conduit; and
a control box configured to:
in response to receipt of a first start signal to initiate a first cleaning operation of the cooking range exhaust system:
cause the first cleaning solution comprising a mixture of a first detergent and water having a ratio based on a first target mixing ratio to be mixed in a reservoir at the first target mixing ratio to form the first cleaning solution;
monitor a float switch in the reservoir;
cause a first electronically-controlled valve to open upon actuation of the float switch thereby indicating the first target mixing ratio has been reached; and
cause the first cleaning solution to be provided to the plurality of nozzles via the hood conduit; and
in response to receipt of a second start signal to initiate a second cleaning operation of the waste conduit:
cause the second cleaning solution comprising a mixture of a second detergent and water having a ratio based on a second target mixing ratio to be mixed in the reservoir at the second target mixing ratio to form the second cleaning solution;
monitor the float switch in the reservoir;
cause a second electronically-controlled valve to open upon actuation of the float switch thereby indicating the second target mixing ratio has been reached; and
cause the second cleaning solution to be dispensed into the waste conduit via the waste conduit cleaning conduit.