The original Stirling cycle was the engine cycle that Stirling proposed in 1816. 1861 Kirk and other proposed the use of reverse Stirling cycle can be cooled, to the 1954 Dutch company Phillips trial successful first Stirling refrigerators, reaching -194 ℃ low temperature. So far this temperature level of Stirling refrigerators have been a variety, and has been able to produce 90K when the cold capacity of 26kW large capacity Stirling refrigerator and 80K when the cooling capacity of 0.5W miniature Stirling refrigerators. 1963 and developed into a "three space" machine, then also made "three space" micro-refrigerator. 1970 made "four space" machine, the minimum temperature of up to 7.8K, 12K when the cold capacity of 0.5W. 1979 has been made to obtain 3.1K low temperature Stirling refrigerator, 4K can output 4mW cold capacity.
　　Stirling refrigeration technology with "green" refrigerant ﹑ low refrigeration temperature ﹑ energy saving ﹑ easy to control the cooling capacity and other characteristics of the application in the refrigerator has a very big advantage. Stirling refrigerator is a new type of integrated refrigerator with a particularly high cooling efficiency; not only energy saving, and has the characteristics of small size, light weight, etc .; a wide range of applications, Stirling refrigerator in the military, commercial , Astronomy, medicine, energy and other fields with a wide range of applications. Now, Stirling refrigerators are on satellite. Remote sensing, communications and other space environment has an increasingly important role.

　　The principle of Stirling refrigerators
　　Inhalation process: When the rotor rotates, the cogging volume gradually increases with the rotor rotation, and connected with the suction port, the gas from the evaporation system through the orifice into the alveolar volume of the gas suction process. After the rotor is rotated to an angle, the interdental volume is disconnected from the suction port through the suction port and the suction process is completed.
　　Compression process: when the rotor continues to rotate, the body, the suction end seat and the exhaust end of the closed alveolar gas, due to the interlocking of the yin and yang rotor and the teeth are filled with each other to the exhaust end, while The pressure is gradually increased to compress the process.
　　Exhaust: When the rotor is rotated so that the cogging space communicates with the exhaust port on the exhaust end seat, the gas is pressed out and discharged from the exhaust flange to complete the exhaust process.
　　The driving mechanism of the Stirling refrigerators plays a vital role in the refrigeration performance. The traditional motor is driven by the curved link mechanism, making the refrigerator structure complex, vibration and has a lot of noise. The wear of the moving parts causes the refrigerant to leak and pollute the environment. Linear motor driven Stirling refrigerators, compression molding machines and linear motor integration, the use of non-contact gas seal, with a small size, light weight. Long life characteristics.

Stirling chiller drive control system

　　The advantages of linear motor-driven refrigerators are:
　　Small footprint: linear motor to reduce the traditional motor link mechanism, simple structure, it can greatly reduce the room occupied area.
　　Simple foundation: the vibration generated by the linear motor is very small, so the foundation can be simple to the room near the cold location, can also be placed in the floor, which in high-rise building air conditioning system, can greatly reduce the pump head, reduce installation and operating costs The
　　Easy installation and operation, low cost of operation and maintenance: the use of linear motor as a whole unit installation, reducing the installation and commissioning workload, and simple, safe, flexible adjustment, less wearing parts, so that maintenance costs.
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