History of the AC Unit
The idea of ​​artificial refrigeration stalled for several years until engineer Willis Carrier accepted the work that led to the invention of the first modern electric air conditioner. Once the companies realized the success of the refrigeration system, Willis Carrier formed the Carrier Air Conditioning Company of America to start manufacturing air conditioners in the factory. In 1933, the American Carrier Air Conditioning Company developed an air conditioner that used a belt-type condensing unit and associated fan, mechanical controls, and an evaporator coil, and the unit became a model in the growing US market. Although it was the most successful air conditioner made to date, it was not until 1902 that Willis Carrier created a cooling system for his lithographic and publishing company, Sackett-Wilhelms.

The first modern air conditioner was invented in 1902 by Willis Haviland Carrier, an accomplished engineer who began experimenting with humidity control laws to solve an application problem in a printing shop in Brooklyn, New York. However, the first modern air conditioning system was not aimed at human well-being; it was designed to control humidity in the print shop where he worked. At first, it was used mainly in factories where products were sensitive to heat and humidity – printing, chocolate, pasta, chewing gum, this kind of thing. It was Cramer who coined the term “air conditioning,” using it in a patent application he filed that year as a counterpart to “water conditioning,” at the time a well-known process for facilitating fabric work.

His original artificial refrigeration machine created ice using a compressor driven by horsepower, water or steam, and Dr. Gorry received a patent for it in 1851. He hoped to eventually use his ice machine to control the temperature of buildings and provided for centralized air conditioning capable of cooling entire cities. Although he continued to use compressor technology and practice medicine, Gorry ultimately hoped to create the perfect air conditioning unit that could cool entire cities. Dr. John Gorry designs the first modern cooling device to solve the humidity problem for a publishing house.

Through a series of experiments, engineer Willis Carrier developed a system for controlling humidity using cooling coils and was awarded a patent for his “air handling device” that could humidify (heat water) or dehumidify (cool water) air). In 1922, Carrier Engineering installed the first elaborate theater cooling system at the Metropolitan Theater in Los Angeles, which forced fresh air through higher vents to improve humidity control and comfort throughout the building. The earliest cooling systems in public theaters were modified heating systems with chillers that distributed cold air through floor vents, resulting in a hot and stuffy environment on the upper level and much cooler temperatures on the lower level, and patrons sometimes resorted to wrapping. Feet warm on newspaper.

Willis Carrier of Buffalo also developed a system (first installed at the Grauman Metropolitan Theater in Los Angeles in 1922) in which air conditioning was supplied from the ceiling and exhausted at floor level. In 1899, Alfred R. Wolf installed an air cooler in the dissection room of Cornell Medical College in New York before Carrier. In 1903, the New York Stock Exchange first installed air conditioners designed to cool people. The first home air conditioners didn’t appear until 1929, when Frigidaire introduced a sizeable room cooler, small for home use.

More complex systems, such as in high-rise buildings, use ductwork to supply cooled air. Large district cooling systems may use an intermediate refrigerant, such as chilled water pumped to ventilation units, or fan coil units adjacent to or in refrigerated spaces, which then transport or deliver cold air to conditioned spaces instead of directing cold air directly into those spaces. premises. space from the plant, which is not achieved due to the low density and heat capacity of the air, which would require impractical air ducts.