Daikin: China’s well-known trademark, one of the top ten central air-conditioning brands, 1924 in Osaka, Japan.

Gree: Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten central air-conditioning brands.

Haier: Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten central air-conditioning brands.

Midea: Chinese famous brand, Chinese well-known trademark, national inspection-free product, top ten central air-conditioning brands.

Broadland: China’s well-known trademark, China’s famous brand, and one of the top ten brands of central air conditioners.

York: Top ten brands of central air conditioners, one of the world's largest air conditioner manufacturers in the United States in 1874.

Carrier: Top ten brands of central air conditioners, the United States in 1902, one of the world's largest air conditioner manufacturers.

Trane: Top ten brands of central air conditioners, well-known professional brands of central air conditioners.

McQuay: Top ten brands of central air conditioners, the United States in 1872, one of the world's largest air conditioner manufacturers.

Hitachi: one of the top ten brands of central air conditioners, founded in Japan in 1910.

Content expansion:

The central air-conditioning system consists of one or more cold and heat source systems and multiple air conditioning systems. The principle of liquid gasification refrigeration is used to provide the required cooling capacity for the air conditioning system to offset the cooling load of the indoor environment; the heating system provides the required heat for the air conditioning system to offset the heat load of the indoor environment.

The refrigeration system is a crucial part of the central air-conditioning system. Its type, operation mode, structural form, etc. directly affect the economy, efficiency, and rationality of the central air-conditioning system in operation.