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Active fault detection and diagnosis method for variable air volume box

An air supply system and fault detection technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc. The effect of wasting waste and shortening the erasing time

Active Publication Date: 2018-08-31
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

Due to the many types of faults and similar symptoms, it is difficult to effectively diagnose faults

Method used

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  • Active fault detection and diagnosis method for variable air volume box

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Embodiment Construction

[0059] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to subordinate implementation example.

[0060] Such as figure 1 As shown, the terminal fault detection and diagnosis method of the active variable air volume air supply system of the present invention includes two steps of passive fault detection and active fault diagnosis;

[0061] Passive fault detection is to use the passive fault detection rule set to analyze the real-time operation data of the end of the variable air volume air supply system. The passive fault detection rule set includes a series of fault detection rules, which can detect whether there is any abnormality at the end of the variable air v...

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Abstract

The invention provides an active fault detection and diagnosis method for a variable air volume box (VAV box). Aiming at the practical situation that faults are difficult to diagnose effectively through a traditional passive fault detection and diagnosis method, the invention provides a method for obtaining a targeted fault symptom measurement value by introducing specific disturbance into an automatic control system. According to the method, most of the faults of the variable air volume box can be effectively diagnosed under the condition that no additional measure point and diagnostic information are added; and a complete fault detection and diagnosis process is provided, in addition, a complete active fault diagnosis rule is formulated for common faults of the variable air volume box, and therefore the fault diagnosis problems caused by the facts that the number of sensors of an existing variable air volume box is small, the diagnosis information is incomplete and the fault featuresare similar can be solved. The novel active fault detection and diagnosis method has the advantage that most of the faults of the variable air volume box can be effectively detected and diagnosed.

Description

technical field [0001] The invention belongs to the fields of building energy saving, building operation and maintenance, and building self-control, and relates to a fault detection and diagnosis method and technology based on knowledge reasoning, in particular to a fault detection and diagnosis method and application at the end of a variable air volume air conditioning system. Background technique [0002] Variable Air Volume (VAV) air supply system can effectively meet the different cooling / heating needs of users in multiple areas, and has been widely used in large public buildings. However, its system scale is huge, its control strategy is complicated, and all kinds of failures occur frequently. Among these faults, the faults at the end of the variable air volume system (VAV box) account for a large proportion. Manual maintenance of so many VAV terminals is not only time-consuming and labor-intensive, but also requires high professionalism of technicians. Therefore, the...

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Application Information

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IPC IPC(8): F24F11/38F24F11/64F24F110/10F24F140/12F24F140/40
CPCF24F11/38F24F11/64F24F2110/10F24F2140/12F24F2140/40
Inventor 赵阳李婷婷李裴婕张学军范誉斌
Owner ZHEJIANG UNIV
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