Active fault diagnosis method for variable air volume air handling unit

An air handling unit and fault diagnosis technology, which is applied to heating methods, mechanical equipment, space heating and ventilation, etc., can solve the problems of increasing the fault diagnosis, difficulty and complexity of variable air volume air conditioning systems

Active Publication Date: 2017-06-20
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The above situation increases the difficulty and complexity of

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  • Active fault diagnosis method for variable air volume air handling unit
  • Active fault diagnosis method for variable air volume air handling unit
  • Active fault diagnosis method for variable air volume air handling unit

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Embodiment Construction

[0078] The embodiments of the present invention will be 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 the following Described embodiment.

[0079] like figure 1 As shown, the VAV air handling unit active fault diagnosis method of the present invention includes data communication, fault diagnosis based on expert rules, and active fault diagnosis;

[0080] 1. The data communication is:

[0081] like figure 2 As shown, step 1-1, using VB language and OPC (English: Object Linking and Embedding for Process Control, referred to as OPC) client from the central The processor acquires real-time operation data of the VAV air handling unit, the real-time operation data includes sensor data, control signals an...

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Abstract

The invention discloses an active fault diagnosis method for a variable air volume air handling unit. The method comprises the steps of data communication, fault diagnosis based on expert rules and active fault diagnosis. In the step of data communication, real-time operation data of the variable air volume air handling unit is obtained from a central processing unit of an EMCS system through VB language and an OPC client side. In the step of fault diagnosis based on expert rules, if the temperature difference between the measurement value of air supply temperature and the set value of air supply temperature is larger than 1.5 DEG C, the measurement value of the opening of a water valve of a surface cooler is smaller than 95%, and the keeping time is longer than 30 min, it is judged that a surface cooler water valve fault exists on a variable air volume air conditioner system. In the step of active fault diagnosis, the faults with various fault reasons in fault symptoms are detected through expert rules, the variable air volume air handling unit enters the preset the active fault diagnosis step, potential fault reasons are eliminated successively, and the faults of the variable air volume air handling unit are separated and diagnosed.

Description

technical field [0001] The invention relates to a fault diagnosis method for a variable air volume air conditioning system, in particular to an active fault diagnosis method for a variable air volume air handling unit. Background technique [0002] The variable air volume air handling unit is an important equipment of the variable air volume air conditioning system. Due to the advantages of good energy saving effect, good thermal comfort, flexible control and easy expansion, the variable air volume air conditioning system has been more and more widely used in high-end office buildings. . The composition of the variable air volume air conditioning system is relatively complicated, and it has high requirements on the level of automatic control, so the faults of the variable air volume air conditioning system occur more frequently. Most modern large buildings are equipped with EMCS system (Energy Management and Control System; English: Energy Management and Control System abbr...

Claims

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Application Information

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IPC IPC(8): F24F11/00F24F11/053F24F11/02F24F11/76
CPCF24F11/30F24F11/52F24F11/62F24F11/64F24F11/70F24F11/72F24F11/76F24F11/84
Inventor 王海涛刘倩夏三县王子嘉王军陈曦刘恺陈雁赵晴王海霞毕文峰
Owner HENAN UNIVERSITY OF TECHNOLOGY
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