This is recorded in the history of China, Egypt, Greece and other countries with earlier cultural development.
1834, American inventor Perkins (1I 1'd) working in London formally submitted a British patent application for ether expansion refrigeration in a closed loop.
This is the prototype of the steam compression refrigerator.
The air refrigerator was invented a little later than the vapor compression refrigerator.
American JohnG orrie introduced the air refrigerator he invented, which is the first air refrigerator used for refrigeration and air conditioning in the world.
France Kale designed and manufactured the first ammonia absorption refrigerator.
Among all kinds of refrigerators, the compression refrigerator has developed rapidly.
From 1870, when American Boyle invented the ammonia compressor, to the first ammonia refrigerator made by German Tilard, the ammonia compression refrigerator was widely used in industry.
With the continuous development of refrigeration models, the types of refrigerants are gradually increasing, from early air, carbon dioxide and ether to methane, sulfur dioxide and ammonia.
1929 with the appearance of freon refrigerant, compression refrigerator develops faster and surpasses ammonia refrigerator in application.
Subsequently, * * boiling mixed refrigerants were used in India in the 2nd century, and non * * boiling mixed refrigerants were used in 1960s.
It was not until 1980s that the problem of eliminating the ozone-depleting substance CR was officially recognized, and the development of refrigerants mainly containing halogenated hydrocarbons almost reached a quite perfect level.
Extended data cooling and air conditioning are more and more widely used in industrial and mining enterprises, houses and public places.
Air conditioning is divided into comfort air conditioning and process air conditioning.
Comfort air conditioning is used to meet people's comfort needs, while process air conditioning is used to meet the needs of technology or equipment in production.
Air conditioning plays an important role in the development of national economy and the improvement of people's material and cultural living standards.
This not only means that the controlled air environment plays an important role in the stable operation of various industrial production processes and ensuring product quality, but also has great significance in improving labor productivity, protecting human health and creating a comfortable working and living environment.
The precision measuring room in precision machinery and instrument manufacturing and industrial production requires high precision constant temperature and humidity; The electronics industry requires high cleanliness air conditioners; The textile industry needs air conditioning to ensure humidity.
At the same time, in civil and public buildings, with the vigorous development of reform and opening up and tourism, there are more and more hotels, hotels, shops, libraries, auditoriums, hospitals, exhibition halls and amusement places equipped with air conditioning.
In addition, cars, trains, planes, ships and other means of transportation are equipped with air-conditioning equipment to varying degrees.
Air conditioning technology includes refrigeration, heating, ventilation and dust removal, among which refrigeration and refrigeration are a key technology of air conditioning.