Two-stage system cooperative control method and device, controller and air handling unit

Abstract

The invention relates to a two-stage system cooperative control method and device, a controller and an air handling unit. The two-stage system cooperative control method comprises the following steps of obtaining an environmental working condition and the demand information of a user; according to the environment working condition and the demand information of the user, calculating unit capacity demand; according to the unit capacity requirement and the outdoor unit rated capacity of each set of system, determining the operation states of the two sets of systems; and controlling the two sets of systems to operate according to the operation states. According to the method, the operation states of the two systems are reasonably controlled through the environment working condition, the user demand and the accumulated operation duration of the systems, alternating is achieved, and the problem that when the two stages of systems are started at the same time, the loads of the two stages of systems are unevenly distributed under a non-standard load condition is solved; and moreover, the problem that when the low-load single stage of system operates, the first-stage system is always started, and starting is unbalanced is solved, and the operation reliability of the whole machine is effectively improved.

Description

technical field [0001] The invention relates to the technical field of two-stage air treatment, in particular to a two-stage system cooperative control method, device, controller and air treatment unit. Background technique [0002] As people pay more and more attention to fresh air and air quality, the market has higher and higher requirements for the air treatment degree of large-scale direct expansion air handling units. In order to meet the needs of users for advanced air treatment, a two-stage refrigeration air treatment method is proposed. [0003] However, the processing and control methods between the two stages of the currently used dual-stage system are completely independent, which will have the following problems: [0004] 1. When the two-stage systems are both turned on, the load adaptability is poor, and the two-stage systems of the unit are cooled according to the same predetermined target, resulting in uneven load distribution of the two-stage systems under o...

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a dual-stage system cooperative control method, device, controller and air handling unit to solve the problem of two The problem of uneven load distribution of the first-level system; and, when the low-load single-level system is running, the first-level system is always turned on, and the startup is uneven

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