随着改革开放和经济的发展，人们的生活水平得到了较大的提高，人们对食品的需求和食品结构都在发生重大变化，对食品的多样化、新鲜、营养、安全、卫生方面的需求日益增加。而新鲜食品种类繁多，贮、运、保鲜难度大、要求高，传统的干藏、冷冻、冷藏、气调、加热、化学处理等 With the reform and opening up and economic development, people’s living standards have been greatly improved, people’s demand for food and food structure are undergoing major changes in food diversification, freshness, nutrition, safety and health needs Increasingly. The variety of fresh food, storage, transport, preservation difficult, demanding, the traditional dry storage, freezing, refrigeration, atmosphere, heating, chemical treatment, etc.