公开(公告)号：US4976112A

公开(公告)日：1990-12-11

申请号：US464375

申请日：1990-01-12

申请人： Mason R. Roberts ,  G. Robb Means

发明人： Mason R. Roberts ,  G. Robb Means

IPC分类号： A23G3/28 ,  A23G9/22 ,  A23G9/28 ,  F25D3/10

CPC分类号： A23G3/28 ,  A23G9/225 ,  A23G9/28 ,  F25D3/105

摘要： A pushcart for frozen confectionaries includes a wheel supported insulated cabinet defining a food storage chamber having a rectangular top opening covered by three pivotally connected and removable lid sections. A stainless steel cryogenic tank is supported within the storage chamber under the center lid section and includes an inner wall surrounded by an outer wall to define a closed space therebetween. The inner tank wall defines a cryogenic chamber for receiving liquid nitrogen, and the space between the walls receives a predetermined partial vacuum or gas for precisely controlling the heat transfer from the storage chamber through the tank walls for absorption by the liquid nitrogen. Nitrogen vapor escapes from the tank chamber into the storage chamber through nozzles to maintain a low pressure within the tank, and the tank may be lifted and removed from the storage chamber after removing the lid sections for interchanging cryogenic tanks with different heat absorbing rates and to facilitate cleaning the inside walls of the cabinet.

摘要翻译： 用于冷冻糖食的手推车包括轮子支撑的绝缘柜，其限定具有由三个可枢转地连接和可移除的盖部分覆盖的矩形顶部开口的食物储存室。 不锈钢低温罐支撑在中心盖部分下方的储存室内，并且包括被外壁包围以在其间限定封闭空间的内壁。 内罐壁限定用于接收液氮的低温室，并且壁之间的空间接收预定的部分真空或气体，用于精确地控制从储存室通过罐壁的热传递，以便被液氮吸收。 氮气蒸汽通过喷嘴从罐室排出到储存室中，以保持罐内的低压，并且在移除用于互换具有不同吸热速率的低温罐的盖部分之后，罐可以从储存室中提升和移除，并且 便于清洁机柜的内壁。