Solar DC Freezer mainly include solar photovoltaic refrigerators and solar semiconductor refrigerators. The solar DC refrigerator is developed on the basis of ordinary traditional compression refrigerators, and consists of solar cells, controllers, storage batteries and refrigerators. Since the internal structure of the solar DC refrigerator is the same as that of the traditional refrigerator, but the power supply device is changed to a solar battery, it is relatively simple to implement.
Solar DC refrigerators use natural solar energy to convert electricity into electricity. Solar panels are installed outside the refrigerator box, and solar energy is collected outdoors and converted into electricity, which is stored in batteries. This kind of refrigerator uses low-voltage power supply, and the DC compressor is directly powered by solar panels, thereby reducing the DC/AC (direct current/alternating current) inverter conversion link and improving the power efficiency. In the event of a rainy day, the battery will continue to provide energy for the refrigerator.
Analysis of the working principle of other refrigerators
Compression refrigerator: The motor provides mechanical energy, and the compressor performs work on the refrigeration system. The refrigeration system is made on the principle of absorbing the heat of vaporization when a refrigerant with a low boiling point is evaporated. At present, more than 90% of the world’s are of this type.
Absorption refrigerator: This type of refrigerator uses heat sources, such as gas, kerosene, and electricity as power. The ammonia-water-hydrogen mixed solution is used to achieve the purpose of refrigeration in the continuous absorption-diffusion process. The disadvantages are low efficiency and slow cooling.
Semiconductor refrigerators: PN-type semiconductors are used to pass direct current to produce the principle of Peltier effect at the junctions to realize refrigeration. Many electronic circuits and micro-instruments often use this method for heat dissipation.
Electromagnetic vibration refrigerator: a refrigerator that uses an electromagnetic vibration machine as the original power to drive the compressor. The principle and structure are basically the same as compression refrigerators.
Solar Refrigerator: A refrigerator that uses solar energy as a cooling energy source.
The function of the compressor: to supplement energy, the low-temperature and low-pressure refrigerant in the evaporator is compressed by the steam compressor into high-temperature and high-pressure superheated steam, and then sent to the condenser.
The function of the condenser: it condenses high-temperature and high-pressure steam into a high-pressure and normal-temperature liquid, and releases a lot of heat. The function of the dry screener: absorb the moisture in the freon, prevent ice blockage, and filter the impurities in the refrigeration system to prevent dirty blockage.