The development stage and overview of condenser. Condenser and evaporator are called heat exchanger, which are the main parts of refrigeration system such as refrigerator and air conditioner. Its development can be roughly divided into the following stages:

The first stage was from 1920s to 1970s. Heat exchanger originated in Europe, early products (such as snake tube heat exchanger) have simple structure, small heat transfer area, large and bulky volume. With the development of manufacturing technology, plate heat exchanger appeared in 1920s and spiral plate heat exchanger was made in Sweden in 1930s. The warping plate heat exchanger is made in England. In the 1960s, China and Sweden independently made umbrella plate heat exchangers. The heat pipe heat exchanger was developed in the mid-1970s.

The second stage is from the late 1970s to the early 1990s. China began to produce refrigerators and air conditioners. The heat exchanger industry began to develop, and the production process gradually matured and improved. The form and function of product structure are diversified. The main types of heat exchangers for refrigerators are wire tube type, blow type, short film type and plate tube type. The main forms of heat exchanger for air conditioning are window machine integral type, split wall mounted type and split vertical cabinet type, with fin tube bundle evaporator and condenser.

3、 In the 1990s, in order to reduce the damage to atmospheric ozone, the world began to put forward the requirement of using fluorine-free self cooling agent to replace freon refrigerant (Montreal related agreement). Since the mid-1990s, most refrigerator manufacturers began to invest in the development and production of fluorine-free refrigerators, and the heat exchanger for refrigerators began to implement the fluorine-free standard. By the end of the 1990s, the refrigerator heat exchanger basically moved towards the fluorine-free standard, marking the beginning of the green environmental protection era.

4、 The stage of environmental protection and energy conservation is from the 21st century to now. Since the 21st century, China has gradually become the main production base of refrigerators and air conditioners in the world, and the domestic heat exchanger industry has entered a stage of prosperity and development. Product production technology and process innovation and improvement. In recent years, green environmental protection, high efficiency and energy saving has become an important theme of the industry development. The structure and function design of heat exchanger mainly meets the requirements of frequency conversion and preservation of refrigerator. As more and more fields begin to require refrigeration products, evaporator and condenser have been widely used in different fields, such as solar energy facilities, automobile refrigeration facilities and marine refrigeration facilities. With the rapid development of product structure, functional design, material substitution and production process of modern two devices, it can be expected that evaporator and condenser will have broad application and development prospects in the future.