1results about How to "Meet drying requirements" patented technology

This invention belongs to the field of heat pump system design and operation control technology. It proposes a positive and negative pressure heat pump drying system and its control method based on the entire material drying process. An air duct is located at the end of the drying chamber furthest from the heat pump dryer, and a material cart is located at the end closest to the heat pump dryer. A positive pressure fan is installed at the air inlet of the air duct, and a buffer zone is provided between the material cart and the air outlet of the air duct. A negative pressure fan is installed at the end of the drying chamber located at the end of the material cart furthest from the buffer zone. During system operation, the speeds of the positive and negative pressure fans are controlled according to the material placement density and moisture content. By controlling the speed of the positive pressure fan, the problem of materials being blown off by the circulating air in the later stages of drying can be avoided. Simultaneously, considering the moisture content to control the fan speed ensures the dehumidification capacity within the drying chamber.