In 1924, the first commercial building with central air conditioning appeared in my country.
The Kadoorie Marble Building (now China Welfare Society Children's Palace), located at No. 164 Yan'an West Road, Shanghai, with a construction area of ??3300m2 and built in 1924, used ammonia vertical 2-cylinder and 4-cylinder ammonia from York Company of the United States. Piston chiller, this is the first commercial building in my country to install central air conditioning.
In the "International Architecture Expo" on the Bund in Shanghai, the Bank of China Building (17-story steel frame structure) built on the Bund in Shanghai in 1937 is the only building built by my country itself, using American Carrier The main unit provided by the company has an air conditioning cooling capacity of 15647kW.
In 1931, a textile factory in Shanghai used underground well water for spray humidification, becoming the first factory in my country to adopt a spray-type air-conditioning system.
In 1936, the Nanjing Xindu Grand Theater installed a refrigerator from the American York Company and built the first central air-conditioning system using Freon refrigerant in a Chinese theater.
Extended information:
The development of air conditioning system forms.
Before the 1970s, air conditioners mainly used all-air systems, and used water spray chambers to cool and humidify the air. The cold water system was an open system.
In the 1970s, due to the construction of high-end hotels, air conditioning entered the guest rooms, thus entering the era of air-water system for air conditioning, the use of inducers and fan coils, and surface air coolers instead of spray chambers for air Processing, the air conditioning cold water system moves towards a closed loop.
The user side adopts the flow regulation of the three-way valve bypass control, so the cold water delivery is a staged constant flow system that controls the number of water pumps. Water system design has also continued to develop, from single-stage pumps with fixed flow to two-stage pumps with variable flow.
Variable air volume systems first appeared in the 1960s. In the late 1970s, my country began to try and explore variable air volume systems, but there was little progress. Due to the world energy crisis, air conditioning energy saving has attracted public attention.
In the 1980s, my country published many articles to discuss variable flow systems, and began to replace three-way valves with two-way valves, using one-stage pumps and two-stage pump variable flow systems that control the number of water pumps.
In the 1980s, the Air Conditioning Research Institute of the China Academy of Building Sciences applied for a patent for the first time, developed a hydraulic balance valve, and began to apply it to actual projects. In the 1990s, frequency converters began to be widely used to control the rotation speed of water pumps, and air-conditioning cold water systems entered the era of variable frequency and variable flow systems.
After the mid-1990s, my country has done a lot of research on the characteristics, design and operation adjustment of variable air volume systems, and achieved good results, especially in terms of ensuring fresh air volume and energy-saving operation adjustment, as proposed The "total air volume control method" replaces the traditional "constant static pressure control method" and achieves good results in application.
The variable refrigerant heat pump system (VRV system) is a new air conditioning system developed in Japan in the early 1980s. With the deepening of my country's economic reform and opening up, foreign air conditioning new technologies and new products continue to pour into the Chinese market. .
The VRV heat pump air conditioning system was first used in the air conditioning systems of some public buildings in Shenzhen in 1986.
After the mid-1990s, Chinese scholars conducted systematic research on variable refrigerant flow systems and achieved good results, mainly in the simulation analysis and control methods of variable refrigerant flow systems.
After Midea Group successfully developed and produced MDV multi-split machines, in the early 21st century, it cooperated with South Korea's Samsung Group to develop a variable refrigerant flow system using a digital scroll refrigeration compressor. ?
Reference: Haier Community-Absolutely useful information! Let’s take a look at the development history of air conditioning in China!