A heat pump drying system that can adjust the relative humidity of the air

Abstract

The invention discloses a heat pump drying system capable of adjusting air relative humidity, comprising a heat pump drying subsystem and a humidifying and defrosting subsystem; wherein, the heat pump drying subsystem is used to form dry circulating air and heat the circulating air , so that the seeds placed therein are dried to obtain dried seeds; the humidification and defrosting subsystem is connected with the heat pump drying subsystem, and is used to increase the circulating air formed by the heat pump drying subsystem Relative humidity in and hot water defrosting of the heat pump drying subsystem. The present invention can adjust the relative humidity in the circulating air used to dry the seeds while ensuring a relatively high drying rate in the drying treatment operation of the seeds, so as to avoid excessive stress inside the seeds, thereby reducing the impact of the drying process on the quality of the seeds. damage, ensure the drying quality of seeds, and promote the application of heat pumps in the field of seed drying.

Description

technical field [0001] The invention relates to the technical field of heat pump drying, in particular to a heat pump drying system capable of adjusting air relative humidity. Background technique [0002] At present, my country's grain output is huge, but due to poor facilities, primitive methods, backward technology and other reasons, the loss caused by untimely grain drying is as high as 40 million tons every year. At present, most farmers still use the drying method to dry grain. This method is not only highly dependent on the climate, but also requires a large area and poor sanitary conditions, which cannot meet the needs of drying a large amount of grain. [0003] During the drying process of seeds, the temperature, humidity and wind speed of the drying air will directly affect the drying rate and final drying quality of the grain. In order to increase the drying rate, simply increasing the temperature excessively will cause the relative humidity of the drying air to ...

AI Technical Summary

Problems solved by technology

In order to increase the drying rate, simply increasing the temperature excessively will cause the relative humidity of the drying air to drop, thereby rapidly accelerating the drying process. However, this will also easily cause stress inside the seeds, and even cause cracking of the seeds in severe cases, making the seeds Loss of vigor, severely reduces dry quality of seeds

[0004] However, there is still no device at present, which can avoid excessive stress inside the seeds while ensuring a high drying rate for the drying process of the seeds, thereby reducing the damage to the quality of the seeds during the drying process and ensuring the quality of the seeds. drying quality

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