小型蓄冷蓄热型热泵干燥装置的理论探讨

A Theory Research on Cool Storage and Heat Storage Type Heat Pump Dryer

针对在农副产品干燥加工中传统的封闭式热泵干燥装置存在的不足,介绍了一种蓄冷蓄热型热泵干燥装置,提出了蓄热时间数与蓄冷时间数的概念,以及采用控制蓄热剂温度来控制制冷压缩机的开机与停机的控制方式;并以小型装置为例,计算出采用石蜡作为蓄冷剂与蓄热剂时所需的最小用量,给出了高温中间换热器与低温中间换热器的设计。

The paper introduces the cool storage and heat storage type heat pump dryer in order to overcome the faults of the traditional closed type heat pump in farm and sideline products drying. It presents the concept of the number of heat storage time and the number of cool storage time, and the way of controlling starting up and stopping of the refrigeration compressor by controlling the temperature of regenerative agent. The paper takes a small device as an example, gives the minimum amount of paraffin as the cool storage agent and regenerative agent, and provides the design of the intermediate heat exchangers of high temperature and low temperature.