Refrigeration Principle

Currently, there are three common types of car refrigerators in the market. According to different classifications, there are three main working principles: refrigeration principle of refrigerators. Refrigeration principle of refrigerators is as follows: compressor type: through mechanical compression (compressor), convective heat exchange (condenser), and throttling and depressurization (capillary), liquid refrigerant is obtained. The liquid refrigerant evaporates into a gaseous state (evaporator) in the refrigerator box, and the heat in the box is taken away through phase change.

, Thus achieving refrigeration effect; Finally, the gaseous refrigerant returns to the compressor; By repeating the above process, the refrigeration system continuously transfers the heat inside the box from the energy source to the outside, thereby achieving the cooling effect. Electronic semiconductor type: Utilizing the Peltier effect of semiconductors for cooling, where heat is transferred from one end to the other when semiconductor components are powered on. The cold end is attached to the inner container of the refrigerator through a cooling block to achieve cooling effect; The hot end dissipates heat into the air outside the box through a radiator and a cooling fan. Absorption type: The refrigeration system utilizes the characteristic of different condensation points between liquid ammonia and water, using gas or electric heating rods to heat the ammonia water mixture, so that the ammonia inside first evaporates to form pure ammonia vapor, and then enters the condenser to cool and condense into liquid ammonia through convective heat exchange with air; Liquid ammonia evaporates at low pressure in the evaporator (the helium gas in the system causes the ammonia partial pressure to be very low), taking away the heat in the box through the phase change of liquid ammonia; At this point, due to the pushing effect of helium, the ammonia vapor returns to the absorber, forming a high concentration ammonia water mixture again and circulating back to the storage tank. Main components of compressor type: compressor, condenser, drying filter, capillary, evaporator, liquid storage tank, temperature controller, sealing tail pipe; Electronic semiconductor type main components: semiconductor electronic chips, heat sinks, cooling blocks, heat exchange fans; Main components of absorption type: liquid storage tank, generator, condenser, evaporator, absorber