在过去的20年里，制冷剂的假冒行为急剧上升。这一增长部分可归因于1987年蒙特利尔议定书和1997年京都议定书（1,2）对制冷剂生产和使用的全球限制。这些协议规定了逐步淘汰和严格监管高臭氧消耗潜能（ODP）和高全球变暖潜能（GWP）制冷剂的使用。这些协议要求用更新、更昂贵和环保的化学品（3、4）替换较旧的制冷剂，并要求重新设计或更换设备，以有效使用这些新制冷剂。

Counterfeiting of refrigerants has seen a dramatic rise over the past two decades. This rise can be partially attributed to global restrictions placed on production and use of refrigerants by the 1987 Montreal and the 1997 Kyoto Protocols (1, 2). These Protocols regulate the gradual phase-out and strict regulations on the use of refrigerants with high Ozone Depletion Potential (ODP) and high Global Warming Potential (GWP). These protocols require that older refrigerants shall be replaced with newer, more expensive, and environmentally friendly chemicals (3, 4) and necessitates redesigned or replaced equipment to operate efficiently with these new refrigerants.