Heat pump vacuum coupling far infrared drying device

Abstract

The invention discloses a heat pump vacuum coupling far infrared drying device comprising a heat pump system, a vacuum system, a far infrared heating system and a control system. The heat pump system, the vacuum system and the far infrared heating system share one vacuum drying box. The heat pump system mainly comprises a compressor, an external evaporator, an external condenser, an external evaporator and an internal condenser. The control system is connected with the heat pump system, the vacuum system and the far infrared heating system and used for setting and adjusting drying working conditions and achieving online monitoring of the drying process. Multiple layers of storage racks and heating coils are arranged inside the vacuum drying box, and the heating coils are installed on the lower surfaces of the layers of storage racks. A circulating convection fan and a water storage box are arranged inside the drying box. The heat pump vacuum coupling far infrared drying device can achieve advantage complementation and integration of a far infrared radiation drying method, a heat pump drying method and a vacuum drying method, achieve airtight steady state internal circulation dehydration and achieve superheated steam heat transfer drying in a vacuum state. The heat pump vacuum coupling far infrared drying device is low in cost, uniform in drying, efficient, capable of saving energy and free of microbial contamination, and product quality is high.

Description

Technical field [0001] The invention relates to a drying device, in particular to a heat pump vacuum coupling far infrared drying device. Background technique [0002] Existing drying devices are mostly divided into physical drying and chemical drying, and in the process of physical drying, most of them use the principle of high temperature blowing. For example, the existing Chinese patent name is "an improved dryer" and the application number is The utility model of CN201420848770.7 discloses an improved dryer, comprising a vacuum drying box and a drying machine base. The vacuum drying box is installed on the top of the drying machine base, and the bottom of the drying machine base is provided with an air inlet, a drying machine base and a vacuum The connecting part of the drying box is equipped with an air outlet, the dryer seat is equipped with a hair dryer, and a heater is arranged between the hair dryer and the air outlet. The vacuum drying box is equipped with multiple dryi...

AI Technical Summary

Problems solved by technology

For the drying of most food and agricultural products, it is often required that the moisture content of the dried product is low. However, in the later stage of heat pump drying, due to the reduction of the heat transfer coefficient between the material and the air, it takes a long time to remove the remaining moisture to meet the drying requirement, and the drying rate slow

Images