Closed inner circulation type tobacco drying device

Abstract

The invention discloses a closed inner circulation type tobacco drying device. The closed inner circulation type tobacco drying device comprises a drying chamber and a drying machine body. A closed cavity is formed in the drying machine body and divided by a sensible heat exchanger into a first cavity and a second cavity which communicate with each other. The drying machine body is further provided with a containing cavity communicating with the outside. A first heat exchanger is arranged in the containing cavity. A second heat exchanger is arranged in the middle portion of the first cavity. A third heat exchanger is arranged in the second cavity. The drying machine body is internally provided with a heat pump system controlling the running state of the first heat exchanger, the second heat exchanger and the third heat exchanger. The heat pump system is adopted as a heat source for the drying machine body, closed convection circulation is conducted between the drying chamber and the drying machine body, air exchange with the outside does not exist in the whole convection circulation drying process, and complete closed drying is achieved. The situation that tobacco fragrance leaks in the drying process, and the tobacco drying quality is affected is avoided.

Description

technical field [0001] The invention relates to the technical field of tobacco drying devices, in particular to a closed internal circulation tobacco drying device. Background technique [0002] Most of the traditional tobacco curing uses coal-fired baking, which has high pollution, low efficiency, and time-consuming and labor-intensive; moreover, the temperature and humidity control in tobacco curing is mostly judged by human perception, so it is difficult to obtain the quality of tobacco drying. ensure. [0003] The heating drying method is a common material drying method, that is, heating the material appropriately to accelerate the evaporation of moisture in the material. This method can effectively shorten the drying time and improve efficiency. At present, there are also methods for tobacco drying. Heat pump drying treatment is adopted, but the drying mode is single, and it is difficult to accurately control the temperature and humidity in the drying process; moreover...

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Problems solved by technology

[0002] Most of the traditional tobacco curing uses coal-fired baking, which has high pollution, low efficiency, and time-consuming and labor-intensive; moreover, the temperature and humidity control in tobacco curing is mostly judged by human perception, so it is difficult to obtain the quality of tobacco drying. ensure

[0003] The heating drying method is a common material drying method, that is, heating the material appropriately to accelerate the evaporation of moisture in the material. This method can effectively shorten the drying time and improve efficiency. At present, there are also methods for tobacco drying. Heat pump drying treatment is adopted, but the drying mode is single, and it is difficult to accurately control the temperature and humidity in the drying process; moreover, the existing heat pump drying treatment adopts the free dehumidification method for dehumidification without exception. While wet, the aroma and aroma contained in the tobacco leaves are also discharged, resulting in a decline in the quality of the tobacco leaves

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