Water spray fume cleansing with demand-based operation
AssigneeOy Halton Group Ltd.
InventorsAndrey V. Livchak, Joe Jones
Life of this patent
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Abstract
A system and method is provided for demand-based control of a cold water spray system of an exhaust ventilation system. Embodiments include determining a demand load of a cooking appliance that generates cooking effluent in a vicinity of an exhaust hood, and determining a temperature of water in the cold water spray system. The cold water spray system is controlled in response to at least one of the determined appliance demand load and the determined temperature of water in the cold water spray system to maintain a low temperature of water in the cold water spray system below a predetermined temperature threshold, thereby enabling efficient removal of contaminants from the exhaust hood by the cold water spray system.
Claims23
A method of controlling a cold water spray system in an exhaust ventilation system, the exhaust ventilation system including an exhaust hood and the cold water spray system, the cold water spray system including a plurality of cold water spray nozzles, the method comprising:
- determining a demand load of a cooking appliance that generates cooking effluent that is captured by the exhaust hood;
- determining a temperature of water in the cold water spray system;
- and
- controlling the cold water spray system in response to at least one of the determined demand load of the cooking appliance and the determined temperature of water in the cold water spray system to maintain a low temperature of water in the cold water spray system below a predetermined temperature threshold, thereby enabling removal of contaminants from the exhaust hood by the cold water spray system, wherein
- the controlling includes draining water from the cold water spray system when the determined temperature of water in the cold water spray system exceeds a first predetermined out-of-bounds temperature threshold.
A method of controlling a cold water spray system in an exhaust ventilation system, the exhaust ventilation system including an exhaust hood and the cold water spray system, the cold water spray system including a plurality of cold water spray nozzles, the method comprising:
- determining a demand load of a cooking appliance that generates cooking effluent that is captured by the exhaust hood;
- determining a temperature of water in the cold water spray system;
- controlling the cold water spray system in response to at least one of the determined demand load of the cooking appliance and the determined temperature of water in the cold water spray system to maintain a low temperature of water in the cold water spray system below a predetermined temperature threshold, thereby enabling removal of contaminants from the exhaust hood by the cold water spray system;
- and
- determining a temperature of the cooking effluent, wherein
- the controlling includes draining water from the cold water spray system when the determined temperature of water in the cold water spray system exceeds the determined cooking effluent temperature minus a first predetermined temperature difference value;
- and
- wherein the first predetermined temperature difference value is a temperature difference between the temperature of the water and the cooking effluent temperature.
A method of controlling a cold water spray system in an exhaust ventilation system, the exhaust ventilation system including an exhaust hood and the cold water spray system, the cold water spray system including a plurality of cold water spray nozzles, the method comprising:
- determining a demand load of a cooking appliance that generates cooking effluent that is captured by the exhaust hood;
- determining a temperature of water in the cold water spray system;
- and
- controlling the cold water spray system in response to at least one of the determined demand load of the cooking appliance and the determined temperature of water in the cold water spray system to maintain a low temperature of water in the cold water spray system below a predetermined temperature threshold, thereby enabling removal of contaminants from the exhaust hood by the cold water spray system, wherein the controlling comprises:
- spraying water through the spray nozzles;
- collecting a portion of water in a collection element of the exhaust hood;
- detecting a water quality of the collected portion;
- responsive to a detected out-of-bounds water quality, implementing at least two water quality recovery schemes, each including one of filtering and transferring heat out of the collected water;
- and
- draining the collected water from the cold water spray system and replacing the collected water if the at least two quality recovery schemes fail to recover the water quality to not be of the out-of-bounds water quality.
Dependencies are inferred from the claim text.