Control method of efficient multi-stage drying system

Abstract

The invention relates to the technical field of heat pump drying, and provides a control method of an efficient multi-stage drying system. The method comprises the following steps of: receiving a starting request of the efficient multi-stage drying system, outputting a fan starting command to a first fan and a second fan, outputting a throttling device starting command to a throttling device, andoutputting a compressor starting command to a compressor; receiving and processing data like temperature data of the downstream of a first heat exchange surface of a first heat exchange assembly, airdew point temperature data of the upstream of the first heat exchange surface of the first heat exchange assembly, dry-bulb temperature data of the upstream of the first heat exchange surface of the first heat exchange assembly and / or relative humidity data of the upstream of the first heat exchange surface of the first heat exchange assembly; and then, when the data is in a first standard deviation parameter range or a second standard parameter range, outputting a fan turning-down command to the first fan. Automatic control over the efficient multi-stage drying system is achieved, manual operation of a user is avoided, and the working efficiency of the multi-stage drying system can be improved.

Description

technical field [0001] The invention relates to the technical field of heat pump drying, in particular to a control method for an efficient multi-stage drying system. Background technique [0002] In order to continuously improve the energy efficiency of heat pump drying, the conventional technology is often to optimize and improve a single heat pump drying unit, and improve the energy efficiency of heat pump drying by adjusting system design, heat exchanger design, control, and air path design; but , this technology has limited improvement in the energy efficiency of heat pump drying. [0003] In order to solve the problem of low energy efficiency in the existing technology, the invention application with application number 202010969665.9 discloses a high-efficiency multi-stage drying system, including a first drying area, a second drying area, a first air duct, and a second air duct , compressor, throttling device, first heat exchanger, second heat exchanger, first heat e...

AI Technical Summary

Problems solved by technology

[0002] In order to continuously improve the energy efficiency of heat pump drying, the conventional technology is often to optimize and improve a single heat pump drying unit, and improve the energy efficiency of heat pump drying by adjusting system design, heat exchanger design, control, and air path design; but , this technology has a limited improvement in the energy efficiency of heat pump drying

[0003] In order to solve the problem of low energy efficiency in the existing technology, the invention application with application number 202010969665.9 discloses a high-efficiency multi-stage drying system, including a first drying area, a second drying area, a first air duct, and a second air duct , compressor, throttling device, first heat exchanger, second heat exchanger, first heat exchange assembly, first fan and second fan, etc., which make full use of multi-stage heat exchange and can use less refrigeration compression Machine circulation, to achieve more cooling capacity and heating capacity as a whole, to achieve the purpose of consuming less power, generating more cooling capacity, and discharging more water, so as to achieve higher energy efficiency of the overall drying system

However, there is a lack of technology related to the control method of this high-efficiency multi-stage drying system in the prior art

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