Heat pump drying device with humidity and temperature adjusting function

Abstract

The invention relates to a heat pump drying device with a humidity and temperature adjusting function. The heat pump drying device with the humidity and temperature adjusting function comprises a drying room, an air return flue, a circulation draught fan in the air return flue, an air exhaust flue communicated with the air return flue, an exhaust fan at an opening of the air exhaust flue, an air heat recovery device arranged at the intersection of the air return flue and the air exhaust flue, and a heat pump unit, wherein the air return flue is communicated with an air feeding opening and an air return opening of the drying room. The heat pump unit comprises a compressor, a temperature-adjusting condenser, a main condenser, an expansion valve, an indoor evaporator and a heat recovery evaporator which are sequentially connected in series through pipes, wherein the main condenser is arranged in the air return flue, and the heat recovery evaporator is arranged at an opening of the air exhaust flue. The temperature and humidity of the drying room can be adjusted directly at any time according to the need of a drying process, sensible heat and latent heat contained in high-temperature and high-humidity air exhausted out of the drying room are recovered to the maximum extent, the evaporating temperature of the heat pump drying device is increased so as to improve the efficiency of the drying device, and accordingly the heat pump drying device has higher properties of energy saving and environmental friendliness.

Description

technical field [0001] The invention relates to a heat pump drying device, in particular to a heat pump drying device capable of realizing heat and humidity regulation. Background technique [0002] Drying has always been an indispensable basic production link for a large number of industrial and agricultural products, and it is also a large energy-consuming household. According to statistics, the energy used in drying operations accounts for about 12% of the total energy consumption of the national economy in China. At the same time, the pollution caused by the drying process is the environment. important source of pollution. Due to the energy crisis, many traditional drying equipment are forced to shrink, and heat pump drying equipment has been widely used as an energy-saving and environmentally friendly product. At present, the vapor compression heat pump is widely used in the industry, which absorbs the heat of the external air through the evaporator in the refrigerant ...

AI Technical Summary

Problems solved by technology

The existing heat pump drying device mainly simply discharges the heated humid air into the atmosphere for dehumidification. Even some slightly advanced structures recover part of the heat of the exhaust air by supplementing fresh air to recover part of the sensible heat of the exhaust air. , there is still a lot of heat energy wasted in vain through the dehumidification process, so this kind of heat pump drying device is still not energy-saving and environmentally friendly; at the same time, when most of the drying rooms are actually in operation, the humidity is mainly adjusted by discharging moisture, The way of supplementing fresh air not only causes a lot of waste of heat, but also makes it difficult to meet the technical requirements of temperature and humidity control

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