1、R22的化学名为二氟一氯甲烷，是氟利昂家族的一员，属于氢氯氟烃类。

1, R22 chemical called two chlorofluoride, is a member of the family of freon, belonging to hydrogen chlorofluorocarbons.

我们目前所使用的制冷剂大多数是R22。由于这种制冷剂对臭氧层具有很大的危害，根据蒙特利尔协议书规定，将于2020年前全面淘汰。

Most of the refrigerants we use at present are R22. Because the refrigerant has great harm to the ozone layer, according to the Montreal agreement, it will be phased out by 2020.

2、R410A则是一种新型的制冷剂。

2, R410A is a new type of refrigerant.

R410A新冷媒由两种准共沸的混合物而成，主要有氢，氟和碳元素组成，具有稳定，无毒，性能优越等特点。同时由于不含氯元素，故不会与臭氧发生反应，即不会破坏臭氧层。

The new refrigerant of R410A is made up of two kinds of quasi azeotropic mixtures, mainly composed of hydrogen, fluorine and carbon. It has the characteristics of stability, innocuity, superior performance and so on. At the same time, because no chlorine element, it will not react with ozone, that is, it will not destroy the ozone layer.

另外，采用新冷媒的空调在性能方面也会有一定的提高。R410A是目前为止国际公认的用来替代R22最合适的冷媒，并在欧美，日本等国家得到普及。

Besides, the performance of the air conditioner with new refrigerant will also be improved. R410A is so far recognized as the most suitable refrigerant for R22, and has been widely used in Europe, America, Japan and other countries.

二、为什么要用R410A取代R22

Two, why do you want to replace R22 with R410A

1、R410A属于低毒性，显示不具燃烧传播性。

1, R410A belongs to low toxicity, showing no combustion spread.

2、R410A的臭氧层破坏系数为0，R22的臭氧层破坏系数为0.05。

2, the ozone layer destruction coefficient of R410A is 0, and the ozone layer destruction coefficient of R22 is 0.05.

3、使用R410A时，系统的总传热特性比R22大，所以可改善系统效率，并且减少热交换器的热传面积。

3, when using R410A, the total heat transfer characteristic of the system is larger than that of R22, so it can improve the system efficiency and reduce the heat transfer area of the heat exchanger.

三、R410A和R22有以下几个不同的特性

Three, R410A, and R22 have the following different features

1、R410 A是由HFC—32（R32）和HFC—125以重量比各50﹪混合而成的冷媒，为近共沸混合冷媒。而R22则为单一物质冷媒。

1, R410 A is composed of HFC (R32) - 32 and HFC - 125 in the weight ratio of 50% mixture refrigerant is near azeotropic refrigerant mixture. R22 is a single material cold medium.

2、R410A的运转压力比R22高约50~70%。

2, the operating pressure of R410A is about 50~70% higher than that of R22.

3、R410A比R22的蒸气密度大。对相同能力的系统，所需的冷媒质量流率相同。因气配管均为相同的管径，所以R410A蒸气流速相较于R22大约慢30%。

The vapor density of 3 and R410A is larger than that of R22. For the same capacity system, the refrigerant mass flow rate is the same. Because the gas piping is the same diameter, the R410A steam velocity is about 30% slower than that of R22.

4、因R32分子具有高极性，故R410A比R22更具有溶解性。

4, because R32 has high polarity, R410A is more soluble than R22.

四、中央空调怎样添加制冷剂

Four. How to add refrigerants in central air conditioning

1、定量加氟：在三通截止阀工艺口连接好三通阀、压力表、加氟软管、氟瓶或真空泵等。放氟抽真空后，开始慢慢加氟。用台秤等较精确的计量工具称重，当氟瓶内氟的减少量即是空调铭牌上的尺度加氟量时，封闭氟瓶阀门。

1, quantitative add fluorine: connect three way valve, pressure gauge, fluorine hose, fluorine bottle or vacuum pump in the three way globe valve. When the fluorine is evacuated, the fluorine begins to be added slowly. Weighing with a more accurate measuring tool such as platform scale, when the amount of fluorine in flask is reduced, that is, the size of fluoride on the nameplate of the air-conditioner is closed.