一、前言公路冷藏运输工具包括冷藏汽车和冷藏集装箱,所用冷源有机械制冷、液氮制冷、于冰制冷和蓄冷式制冷。蓄冷式制冷的冷藏运输工具,由于投资小、运行可靠,维修方便、运输费用低,已成为冷藏运输工具发展的一个方向。蓄冷式冷藏运输工具的冷源(冷却设备)有活动式和固定式两种,前者需在冷库中充冷,后者通以制冷剂蒸发盘管,实际上是 I. INTRODUCTION Road refrigerated transport vehicles include refrigerated trucks and refrigerated containers. The refrigerators used are mechanical refrigeration, liquid nitrogen refrigeration, ice refrigeration and regenerative refrigeration. Cold storage refrigerated transport vehicles, due to small investment, reliable operation, easy maintenance, low transportation costs, has become a frozen transport development in one direction. Cold storage of cold storage transport equipment (cooling equipment), there are two kinds of mobile and fixed, the former need to be cold in the cold storage, the latter through the refrigerant evaporation coil, in fact,