In today’s society, due to energy shortages, the theme of household appliances is basically energy conservation and environmental protection, energy conservation has been further developed, and various new energy-saving advanced electrical appliances have become more and more perfect. Therefore, like solar dc freezer , solar water heaters, solar lights, solar batteries, solar power generation, solar fan covers, solar electric fans, etc., more and more solar energy is converted into electricity.

Solar appliances use photovoltaic conversion devices to convert solar energy into electrical energy, and then use them to drive semiconductor refrigeration systems or conventional compression refrigeration systems to achieve refrigeration, namely photoelectric semiconductor refrigeration and photoelectric compression refrigeration. The premise of this cooling method is to convert solar energy into electricity. The key is photoelectric conversion technology, which must use photoelectric conversion receivers, namely photovoltaic cells. Its working principle is the photovoltaic effect.

Solar thermal conversion refrigeration first converts solar energy into thermal energy, and then uses thermal energy as external compensation to achieve the purpose of cooling. Light-to-heat conversion mainly realizes refrigeration from the following aspects, namely, solar absorption refrigeration, solar adsorption refrigeration, solar dehumidification refrigeration, solar vapor compression refrigeration and solar steam jet refrigeration. Among them, solar absorption refrigeration has entered the application stage, and solar absorption refrigeration is still in the experimental research stage.

With the theme of energy saving and environmental protection, the conversion of solar energy into electricity has always been a hot topic. Using solar energy can save other energy sources as much as possible, relatively speaking, it can save a lot of other energy. Some mini car freezer also use solar energy for cooling.