New environmental friendly n-Pentane / Isopentane refrigerant with higher efficiency
Refrigerant refrigerant, also known as refrigerant, snow kind. In the refrigeration system, it is vaporized by the energy absorbed by the cooling medium in the evaporator, and the heat is transferred to air and water in the condenser to condense. The increasing consumption of refrigerants in China also drives the demand for refrigerants. Another point is that the state promotes fluorite to be a strategic resource for protective development. Combined with these reasons, the price of refrigerants is gradually rising.
At present, there are more than 80 kinds of substances used as refrigerants, including ammonia, freon-12, Freon-22, R-134a, r-404a refrigerant, R-410A refrigerant, azeotropic refrigerant and hydrocarbon refrigerant. Previously, with regard to the impact on the ozone layer, the production of CFC substances such as R11, R12, R113, R114, r115, R502 and R22 in Freon was restricted.
In the early days, most refrigerants were flammable or toxic, and some accidents often occurred due to high pressure. The history of isobutane R600a refrigerant development appeared in the middle of the 19th century. Mechanical refrigeration, using ether as refrigerant, is a steam compression system. Carbon dioxide (CO2) and ammonia (NH3) were first used as refrigerants in 1866 and 1873, respectively. Other chemicals include chemical cyanogens (petroleum ether and naphtha), sulfur dioxide (r-764) and methyl ether, which have been used as refrigerants for vapor compression. Its application is limited to industrial processes. Most foods are still preserved with ice collected in winter or prepared industrially.
R290 refrigerant and propane refrigerant are hydrocarbon refrigerants, which have no damage to the ozone layer and have a very small greenhouse effect. They are today’s environmentally friendly refrigerants. From the perspective of environmental protection, almost all countries in the world have no restrictions on the use of R290 refrigerant in the initial installation of new refrigeration equipment and after-sales maintenance. The product is mainly used to replace R22 and R502 refrigerants in low-temperature refrigeration equipment; Because R290 is flammable, it is usually only used in low-temperature refrigeration equipment with less liquid filling, or as a component of low-temperature mixed refrigerant; R290 is compatible with traditional lubricants. R290 refrigerant cylinders for storage and transportation are pressurized containers, which are flammable and explosive. They should be stored away from kindling and heat sources to avoid direct exposure to the sun. They are usually stored in a cool, dry and ventilated warehouse; Handle with care to prevent damage to steel cylinders, valves and other accessories. Matching refrigerant oil for the refrigerant oil used with R290 refrigerant, it should follow the recommendations of the refrigeration compressor and refrigeration (air conditioning) equipment manufacturers, or determine to use the refrigerator lubricating oil with the same design requirements according to the specific conditions of the refrigeration compressor and refrigeration equipment, that is, select the equivalent refrigerant oil.
The refrigerant in the refrigerator is fluorinated quantitatively. Use a quantitative liquid dispenser to add fluorine according to the marked amount. When adding fluorine, feel whether the air return pipe feels cool by hand. The air return pipe is very cold or slightly dewy, and the evaporator is basically hung with frost. When filling, first add less fluorine than the original amount, let it run, wait until the evaporator is full of frost, and finally add it until the return pipe only condenses. In general, the steps of adding fluorine to the refrigerator are very simple. Vacuum, draw out the air inside, add fluorine after pumping, and then seal it.
The use of new environmentally friendly refrigerants does not destroy the ozone layer, and the refrigeration efficiency is higher than before. The international community has also begun to use emerging hydrocarbon refrigerants, which fully meet the international standards for energy conservation, environmental protection and emission reduction. They are currently the international ideal refrigerants.