Urbanization in China is developing rapidly. Urban production infrastructures, social infrastructures (such as commerce, catering, service industry, financial and insurance institutions, housing and public utilities, public transportation, transportation and communication agencies, education and healthcare institutions, and cultural and sports facilities) and institutional safeguard agencies (such as public security, political and legal departments, and urban construction planning and management departments) are constructed to facilitate various economic and other social activities in cities. The level of infrastructures continues to improve with economic and technological development, with more diverse types and better services. Central air conditioning systems, as an essential supporting facility of modern infrastructure buildings, require customized designs based on the application characteristics of different buildings. While meeting functional requirements , they must also be energy-efficient, low-carbon, and environmentally friendly, and be able to contribute to the joint construction of smart and green cities.