Grain drying device

Abstract

The invention discloses a grain drying device. The grain drying device comprises a drying tower (1); one side of the drying tower (1) is communicated with a heat pump (2) for supplying hot wind; a dust collecting chamber (3) for collecting grain dust is arranged on the other side of the drying tower (1), and is communicated with the drying tower (1) through a dust removing pipe (4); and an evaporator (5) of the heat pump (2) is arranged in the dust removing pipe (4). The grain drying device is provided with the evaporator of the heat pump in the dust removing pipe, can improve the efficiency of the evaporator by using heat of dust-contained gas, and is energy-saved and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of drying equipment, in particular to a grain drying device. Background technique [0002] The process of grain from harvesting to storage requires drying of the grain to facilitate subsequent processing or long-term storage of the grain. The heat pump grain dryer has the advantages of less pollution, low energy consumption and low cost compared with the traditional dryer by burning fuel. Therefore, there are more and more heat pump grain dryers in the prior art. Dryers used to replace traditional fuel-burning methods. [0003] The grain dryer in the prior art mainly includes a heat pump and a drying tower. The heat pump compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant through a compressor, and then sends it to the condenser to dissipate heat to become a liquid refrigerant at room temperature and high pressure. During this process, the heat emitted by the con...

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Problems solved by technology

[0004] Therefore, the existing heat pump grain dryer needs to be equipped with a defrosting device. One method is to use a four-way valve to make the flow direction of the refrigerant in the condenser and evaporator opposite to the normal process state of the dryer, that is, through high temperature and high pressure refrigeration. The agent flows into the evaporator to achieve the defrosting effect, but due to the conversion of the heat exchange effect between the condenser and the evaporator, the condenser that originally supplied the dry hot air in the barn is converted to provide cold air, and this process will cause the cold air to flow back into the barn , to destroy the original dry environment in the barn; another method is to install a resistance wire on the evaporator, connect the resistance wire to the controller, and defrost the evaporator through the resistance wire. A dry environment inside the desiccator, but with increased resource consumption

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