Heat pump tobacco drying room using closed type humidity elimination and open type hot air in combined mode

Abstract

The invention discloses a heat pump tobacco drying room using closed type humidity elimination and open type hot air in a combined mode. The heat pump tobacco drying room comprises a drying chamber and a heat controlling chamber, the heat controlling chamber comprises a heating unit and a dehumidification and backheating unit, the heat controlling chamber is internally provided with a heat pump and a separate type heat pipe exchanger, the heat pump comprises a compressor, a condenser and an evaporator; the separate type heat pipe exchanger comprises a heat pipe condensation section and a heat pipe evaporation section, the condenser and the heat pipe condensation section are arranged in the heating unit side by side and divide the heating unit into a first air inlet cavity and a first air outlet cavity, condensate water collectors are arranged at the bottom end of the condenser and the bottom end of the heat pipe condensation section, the evaporator and the heat pipe evaporation section are arranged in the dehumidification and backheating unit side by side and divide the dehumidification and backheating unit into a second air inlet chamber and a second air outlet chamber, the first air inlet chamber and the second air outlet chamber and the drying chamber are controlled to be connected or disconnected through valves, switching of the closed type and the open type is achieved in structure, the requirements of all stages of tobacco drying are met, and the quality of dried products is improved.

Description

technical field [0001] The invention relates to the technical field of tobacco leaf drying equipment, in particular to a heat pump tobacco leaf drying room which is combined with closed type dehumidification and open type hot air. Background technique [0002] At present, the heat pump drying tobacco leaves all adopt the open mode of operation. The so-called open mode of the heat pump is compared with the closed mode of the heat pump. Simply put, the open mode is like the heating mode of the household split air conditioner. The outdoor unit, the drying room is like the indoor unit, which circulates and heats the objects to be dried, and the main machine outside the drying room is a compressor and an evaporator, which are used to absorb the heat of the outdoor air. Closed dehumidification drying and open hot air drying are two heat pump equipment with completely different principles. The two methods have their own advantages and disadvantages. The products processed by closed...

AI Technical Summary

Problems solved by technology

Closed dehumidification drying and open hot air drying are two heat pump equipment with completely different principles. The two methods have their own advantages and disadvantages. The products processed by closed drying and drying have small deformation, positive color and strong fragrance. , the closed drying operation cost is low, the disadvantage of the closed drying drying is: in the later stage of the drying process, after the drying temperature exceeds 50 ° C, the humidity in the drying room is small at this time, and the closed drying The dry heat pump evaporator and the separated heat pipe evaporator are both cooling. If the humidity is low, not much water can be condensed. Cooling affects the drying heating temperature. At this time, the efficiency is lower than that of the open type.

At present, the vast majority of domestic heat pump dryers use open-type hot air drying. Compared with closed-type dehumidification drying, open-type hot-air drying has the advantage of high drying efficiency in the later stage of drying, but the products after drying are deformed and discolored. Not right, great loss of flavor

It is difficult to achieve the ideal drying effect by using a single drying method

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