A cascade hot air control system and method

Abstract

A cascading hot air control system, including a temperature detection unit and a control execution unit; a first sensor is arranged in the temperature detection unit; a low temperature level control subunit, a medium temperature level control subunit and a high temperature level control subunit are formed. Gradient adjustable adaptation; based on the current target temperature, according to the current hot air temperature detected by the first sensor, the control based on the low-temperature level control subunit, the medium-temperature level control subunit and the high-temperature level control subunit is enabled. Its control method forms a control adjustment that matches the current target temperature through the established temperature detection unit and control execution unit; and establishes a corresponding working mode in the control execution unit according to the current working environment temperature to form a working environment that is suitable for the working environment. Mode; on the one hand, it can enable the unit to continuously output high-temperature hot air in severe cold weather; on the other hand, it can well restrain the excessive rise of exhaust gas temperature and ensure the stability of the system under high temperature operation.

Description

technical field [0001] The invention belongs to the field of drying agricultural and sideline products, and in particular relates to a cascading hot air control system and method. Background technique [0002] With the improvement of the market's requirements for the taste and quality of drying various agricultural and sideline products, manufacturers are also facing unprecedented challenges in the manufacture of drying equipment. In addition, the country strongly advocates the use of new energy sources to ban existing coal-fired and oil-fired boilers to achieve green environmental protection, and the promotion and use of air sources is in full swing. However, the severe cold weather in winter in the north is not conducive to the stable operation of the machine and the continuous output of high-temperature hot air from the unit, and severe frost will form on the evaporation side of the outdoor unit in winter. [0003] The utility model with the application number 2017210807...

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Problems solved by technology

[0005] In order to effectively solve the demand for stable production of high-temperature hot water or hot air in winter in northern severe cold regions, this invention innovates a cascade hot air control system and method, which uses environmentally friendly refrigerants without damaging the environment and effectively solves the problem of conventional air source heat pumps. The problem that high temperature hot water cannot be produced normally in winter

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