Heat pump drying equipment with dehumidification and humidity elimination switching function and drying method

Abstract

The invention discloses heat pump drying equipment with a dehumidification and humidity elimination switching function and a material drying method. The heat pump drying equipment comprises a heat pump system and a drying workshop, wherein the drying workshop is internally provided with a heat pump host machine room, a return air passage and a drying room; the top of the return air passage is higher than the drying room, and an air outlet communicated with the return air passage is formed in the right side of the drying room; the return air passage is internally provided with a humidity elimination air passage, and the other end of the humidity elimination air passage stretches into the heat pump host machine room; an internal circulation air door is arranged between an exhausting room and the heat pump host machine room, and an exhaust air door is arranged on the side wall of the exhausting room; the heat pump host machine is internally provided with a fresh air passage, a heat recycling device is arranged at the joint of the fresh air passage and the humidity elimination passage, and an internal fresh air door is arranged on the fresh air passage. The heat pump drying equipment with the dehumidification and humidity elimination switching function disclosed by the invention is compact in structure, and is matched with the drying method; optimal operation modes can be selected according to specific conditions, all advantages of each mode are synthesized, the influences of the defects of each mode are reduced through mode switching, the energy consumption is low, and the drying efficiency is high.

Description

technical field [0001] The invention relates to a heat pump drying device, in particular to a special device and a drying method suitable for dehydration and drying of agricultural by-products and the like. Background technique [0002] At present, heat pump drying equipment has broad development prospects in the field of drying equipment, especially in the field of drying where the drying temperature is below 75°C. As the country pays more and more attention to energy conservation and environmental protection, the application of heat pump drying equipment has attracted more and more attention. [0003] Heat pump drying equipment is a special equipment for material drying. The heat pump system provides heat supply for the drying equipment, and sends the heated airflow into the drying chamber. The high-temperature dry airflow takes away the water vapor in the material, so as to achieve the purpose of drying. When using circulating air, as the high-temperature airflow continu...

AI Technical Summary

Problems solved by technology

[0006] The above two types of drying equipment have their own characteristics, and their advantages and disadvantages are also obvious.

The hot air dehumidification mode is greatly affected by the state of the cold air outside, and the efficiency is relatively low when the outside world is colder; the evaporator dehumidification type is greatly affected by the characteristics of the material. very low energy efficiency

[0007] At present, the market lacks a heat pump drying equipment that can maximize strengths and avoid weaknesses, and integrates two types of drying equipment.

Images