Preservation system for perishable products

A preservation system for emitting a dry fog to preserve perishable products in a display case, comprising:

• a control device selectively actuated to provide a pressurized water supply;
• a pressure regulator connected to the control device for reducing water pressure to a range of 0.5-2 psi;
• a plurality of atomizer nozzles, each comprising a piezoelectric transducer, operatively mounted in spaced apart relationship in a product zone of the display case 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 atomizer nozzles, and a timer for alternately generating an on signal and an off signal to periodically control the control device to supply water to the pressure regulator and to enable the controller whereby when the controller is enabled by the timer the atomizer nozzles emit the dry fog in accordance with the duty cycle of the pulse signal to maintain relative humidity level throughout the display case.