Drying and refrigerating integrated system and control method

Abstract

The invention relates to a drying and refrigerating integrated system and a control method, and belongs to the technical field of drying and refrigerating. The drying and refrigerating integrated system comprises a drying module, a refrigerating module and a condensing evaporator, wherein the drying module is used for heating a drying space by utilizing heat release of a first refrigerant; the refrigerating module is used for refrigerating a refrigerating space by utilizing heat absorption of a second refrigerant; the condensing evaporator comprises two refrigerant channels and a phase changeheat storage material which fills the peripheries of the two refrigerant channels; and the condensing evaporator is connected with the drying module and the refrigerating module through the two refrigerant channels, so that when the first refrigerant and the second refrigerant flow through the condensing evaporator, the first refrigerant and the second refrigerant exchange heat with the phase change heat storage material in the condensing evaporator. According to the drying and refrigerating integrated system and the control method, the adverse effect of one of drying and refrigerating on theother one of drying and refrigerating is solved while the energy utilization rate is improved.

Description

technical field [0001] The application belongs to the technical field of drying and refrigeration, and in particular relates to an integrated drying and refrigeration system and a control method. Background technique [0002] Heat pump drying is widely used in industrial and agricultural fields, and its use areas are all over the country. Considering that most agricultural and sideline products not only need to be dried, but also need cold storage for refrigeration and preservation, the evaporator of the heat pump system can be used to realize the refrigeration function. However, in practical applications, because the drying process control consists of multiple process stages, for example, including: heating stage, temperature maintenance stage, shutdown stage, etc., the speed of heating rate and temperature maintenance performance have a greater impact on the drying quality. large impact, the drying load control changes greatly, while the control of the refrigeration syste...

AI Technical Summary

Problems solved by technology

However, in practical applications, since the drying process control is composed of multiple process stages, for example, including: heating stage, temperature maintenance stage, shutdown stage, etc., the speed of heating rate and temperature maintenance performance have a greater impact on the drying quality. large impact, the drying load control changes greatly, while the control of the refrigeration system is relatively simple, and the refrigeration load control changes little. In terms of control, in the actual use of simultaneous drying and refrigeration in the heat pump system, load mismatch often occurs, such as , Of the two types of drying and refrigeration, one may have a larger load, while the other may have a smaller load, resulting in poor temperature maintenance. The respective controls of drying and refrigeration will have an adverse effect on the other.

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