【Special topic】Summary and development of scroll refrigeration compressor technology

【Special topic】Summary and development of scroll refrigeration compressor technology Advantages of scroll refrigeration compressors:

　　1. There is no reciprocating mechanism, so the structure is simple, small in size, light in weight, few parts (especially few wearing parts), and high reliability;

　　2. Small torque change, high balance, small vibration, stable operation, easy operation and easy automation;

　　3. It has high efficiency within the range of its adapted cooling capacity;

　　 4. Low noise.

　　 Disadvantages of scroll refrigeration compressor:

　　1. The surfaces of the moving parts are mostly curved. The processing and inspection of these curved surfaces are complicated, and some require special equipment, so the manufacturing cost is relatively high.

2. Between the moving parts or between the moving parts and the fixed parts, the sealing is often achieved by maintaining a certain movement gap. The gas passing through the gap will inevitably cause leakage, which limits the difficulty of the rotary compressor to achieve greater compression Compared with, therefore, most rotary compressors are used in air-conditioning conditions.

　　 3. High sealing requirements and complicated sealing structure.

The development history of scroll refrigeration compressors

1. In 1905, Frenchman Leon Creux proposed the working principle of scroll machinery and applied for a US patent.

　　 2. The emergence of high-precision CNC milling machines in the 1970s and the aggravation of the world's energy crisis promoted the development of scroll compressors.

　　3. In 1972, the American ArthurDLittle Company successfully developed a scroll compressor to compress helium, and applied it to ocean-going ships, marking the arrival of the practical era of scroll compressors.

　　4. In the 1980s, scroll compressors first achieved commercial applications in the field of air-conditioning compressor technology. (In 1981, Sanden, Mitsubishi·Heavy·Industries introduced scroll compressors for automobile air-conditioning; in 1983, Hitachi introduced hermetic scroll compressors for cabinet air-conditioning; in 1987, Copeland began to produce air-conditioning compressors)

　　 Series products of scroll compressors came out one after another in the 1990s. Japan's Matsushita Electric Co. has produced small hermetic compressors for household air conditioners; Toshiba has introduced compressors for train air conditioners; Carrier has introduced scroll compressors used in parallel on chillers. Scroll air compressors have also been developed.

Prospects of scroll refrigeration compressors

　　 Looking at the current research status and application of scroll refrigeration compressors, the research and development direction of scroll compressors in the next few years is summarized as follows:

　　 　　(1) Reduce the processing cost of scroll refrigeration compressors, mainly the processing of scrolls. Looking for a simple way to process complex lines with good performance.　

　 　　(2) To study the new requirements of new environmentally friendly refrigerants on the structure of scroll refrigeration compressors.

　　 　　(3) Increase the power range of scroll refrigeration compressors and broaden its application fields, especially to study its frequency conversion characteristics and its application in air conditioning heat pumps.

　　 　　(4) Improve the balance mechanism of the compressor, especially the balance of axial gas force. Reduce gas leakage and reduce mechanical friction loss, thereby improving the efficiency and reliability of scroll refrigeration compressors.

　　 (5) Strengthen experimental research on actual operation, establish a unified system for the corresponding development of scroll refrigeration compressor theory and experiment, and ensure the accuracy of the development direction of scroll refrigeration compressors based on other types of compressors.

(6) Establish the modular mathematical model of the system including compressor oil cooling, oil supply, motor and other external systems to make it universal; and strengthen the internal thermodynamic and dynamic characteristics of the compressor on the original basis. Research and analyze the working process of the compressor under various operating conditions more comprehensively;

　　(7) Expand scroll refrigeration compressor models, and break the gap in scroll compressors with large capacity (> 2 L/min).

　 　　(8) Improve the processing technology of the scroll refrigeration compressor to ensure the performance and quality of the compressor.　

　 　　(9) Enhance the market competitiveness of scroll refrigeration compressors. On the basis of ensuring performance and quality, reduce production costs and operating costs, thereby reducing product prices and realizing mass production.