Heat pump system for humidity removing and drying

Abstract

The invention discloses a heat pump system for humidity removing and drying. The system is used for providing hot air required by drying of a drying room. The system comprises an arranged primary hotair system, the primary hot air system outputs basic hot air through an air supplying heating condenser arranged in the system, and the basic hot air is conveyed to the drying room through an air supplying draught fan arranged in the primary hot air system; hot air exhausted from an air outlet of the drying room is filtered by a first primary filter arranged in the primary hot air system and conveyed to an air inlet of an air-returning evaporator arranged in the primary hot air system through a pipeline and an air inlet of an air supplying heating condenser through an air outlet pipeline of anair-returning evaporator, and first weighting for basic hot air is formed after primary humidity removing. Air-returning humidity removing, heating for new air, overheating of a compressor in air sucking process and transferring of outside free heat the drying room are achieved to meet the requirements of variable working conditions of high-low temperature and high-low humidity in the drying room.

Description

technical field [0001] The invention belongs to the field of hot air drying, and in particular relates to a heat pump system for dehumidification and drying. Background technique [0002] At present, there are more and more places that need hot air drying in the market, such as tobacco drying, grain drying, medicinal materials drying, fruit and vegetable drying and other drying places. Coal furnaces, gas furnaces and electric furnaces are mainly used for drying. Coal and gas are non-renewable strategic energy sources, which are not the direction of national promotion. Electric furnaces are not suitable for mass promotion because of their high energy consumption and high operating costs. Due to the many reasons mentioned above, heat pump dryers are now gradually being accepted by the market because of their many advantages such as energy saving, environmental protection, and high drying quality. There are two main types of drying heat pumps on the market, one is hot air dehu...

AI Technical Summary

Problems solved by technology

There are mainly two types of drying heat pumps on the market, one is hot air dehumidification drying, this drying method is suitable for places that require fast water discharge and high drying temperature; the other is dehumidification drying, Suitable for places with low drying water rate and low drying temperature

[0003] However, because the drying requirements of various materials are very different, and at the same time, during the drying process, the dry and wet bulb temperatures in the air are different in different time periods, and the requirements are different, resulting in customized products that cannot be formed. Batch

[0004] The invention application with the application number 201610094280.6 discloses a drying dehumidifier, including a compressor, an indoor condenser, an outdoor evaporator, a first throttle valve, an outdoor heat exchanger and a control system. The dehumidification circulation pipeline and the low-temperature dehumidification circulation pipeline, the controller controls the circulation of the refrigerant in the corresponding circulation pipeline, and can heat up or cool down the dehumidification of the material, thereby overcoming the drying and dehumidification heat pump unit in the prior art that only has the function of heating and dehumidification Mode, but not the defect of low-temperature dehumidification of materials

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