According to the statistical analysis of "2013-2017 China Refrigerator Industry Market Outlook and Investment Opportunity Analysis Report", refrigerators have the following 9 operating principles according to different classifications:
1) Compression refrigerator: This type of refrigerator uses an electric motor to provide mechanical power and uses a compressor to perform work on the refrigeration system. The refrigeration system is manufactured using the principle of low boiling point refrigerant absorbing heat as it evaporates and vaporizes. Its advantages are longevity and ease of use. 91 to 95% of refrigerators worldwide fall into this category. Commonly used refrigerators use a refrigerant called R600 refrigerator as a heat “carrier” to “transport” the “heat” from the refrigerator to the outside of the refrigerator.
2) Absorption refrigerator: This type of refrigerator can use heat sources (such as gas, kerosene, electricity, etc.) as energy. A mixed ammonia-water-hydrogen solution is used to achieve the refrigeration purpose in the continuous absorption-diffusion process. Its disadvantages are low efficiency and slow cooling, and it has been gradually eliminated.
3) Semiconductor refrigerator: it is a refrigerator that uses the principle of passing direct current through PN type semiconductors to produce the Peltier effect on the nodes in order to obtain refrigeration.
4) Chemical Refrigerator: This is a refrigerator that uses certain chemical substances to strongly absorb heat when dissolved in water to achieve a refrigeration effect.
5) Electromagnetic vibration refrigerator: this is a refrigerator that uses a machinee with electromagnetic vibrations as the driving force to drive the compressor. Its principle and structure are basically the same as compression refrigerators.
6) Solar Refrigerator: It is a refrigerator that uses solar energy as refrigeration energy.
7) Refrigerator with adiabatic demagnetization.
8) Refrigerator with radiant refrigeration.
9) Refrigerator with solid refrigeration.