Patent ID: 7543455
Filing Date: 2009-06-09
Classification: F25B,F25D,Y02B

Abstract:
1. A solar-powered refrigerator comprising: A thermally insulated box having a freezer cabinet and a cooler cabinet; an energy-storage vessel filled with a mixture of glycerin, alcohol, and water having a freezing point of 10° F. to −10° F., located near the top of the freezer; a solar photovoltaic panel for generating electric power from sunlight; a DC motor driven by the electricity generated by the solar photovoltaic panel; a vapor-compression refrigeration unit driven by the DC motor to freeze the mixture of glycerin, alcohol, and water in the energy-storage vessel; a set of heat exchange coils filled with brine for cooling down the cooler using the cold energy stored in the energy-storage vessel; a thermostat to activate the pump to set the brine to flow if the temperature of the cooler is higher than the set temperature.