US 12,220,070 B2
Preservation system for perishable products
Paul Jones, Ingleside, IL (US); Christian Trujillo, Hainsville, IL (US); Emily C. Stavrou, Grayslake, IL (US); and Eric Ellingson, Libertyville, IL (US)
Assigned to Corrigan Corporation of America, Gurnee, IL (US)
Filed by Corrigan Corporation of America, Gurnee, IL (US)
Filed on Aug. 16, 2022, as Appl. No. 17/888,685.
Prior Publication US 2024/0057792 A1, Feb. 22, 2024
Int. Cl. A47F 7/00 (2006.01); A47F 3/04 (2006.01)
CPC A47F 7/0071 (2013.01) [A47F 3/0495 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A preservation system for perishable products in a display case, comprising:
a control valve for connection to a pressurized water supply;
a pressure regulator connected to the control valve for reducing water pressure in a range of 0.5-2 psi;
a plurality of nebulizers, each comprising a piezoelectric transducer, operatively mounted in a product zone of the display case in spaced apart relation to one another and fluidically connected in series with an output of the pressure regulator to emit a dry fog in the display case; and
a control system comprising a controller for controlling a duty cycle of a pulse signal to vibrate the piezoelectric transducers in the plurality of nebulizers, and a timer for alternately generating an on signal and an off signal to periodically control the valve to supply water to the pressure regulator and to enable the controller whereby when the controller is enabled by the timer the nebulizers emit the dry fog in accordance with the duty cycle of the pulse signal to maintain relative humidity level throughout the display case.