Fresh air system constant air volume control method and system

A control method and technology for a fresh air system, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as high dependence, increased hardware costs, and location sensor failures, and achieve stable air volume and reduced air volume. Small cost, avoiding the effect of too large or too small air volume

Inactive Publication Date: 2019-08-20
普瑞氏(无锡)智能科技有限公司
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Problems solved by technology

These methods not only have a high dependence on the performance of the position sensor, but also increase the hardware cost, and also bring the risk of failure due to the failure of the position sensor.

Method used

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  • Fresh air system constant air volume control method and system
  • Fresh air system constant air volume control method and system

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Embodiment Construction

[0018] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions adopted in the examples can be further adjusted as the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0019] Please refer to figure 1 Shown is a schematic structural diagram of a control system for constant air volume of the fresh air system according to the present invention. The fresh air system of the present invention comprises a control unit 10, a current detection unit 20, a motor drive unit 30 and a motor 40, the control unit 10 is electrically connected to the current detection unit 20 and the motor drive unit 30 respectively, and the motor drive unit 30 is electrically connected to the current detection unit 2...

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Abstract

The invention provides a fresh air system constant air volume control method. The method comprises the steps that the current value of a motor is detected; whether the current value is larger than a preset current value is judged; if so, the duty ratio of a supply circuit of the motor is decreased so as to decrease the current value; and if not, the duty ratio of the supply circuit of the motor isincreased so as to increase the current value. According to the method and the system, the duty ratio is adjusted by detecting the current of the motor, constant motor power is achieved through closed-loop control of the current, constant air volume of a draught fan is achieved by remaining constant motor power, the situation that the air volume in a user's home is too high or too low is avoided,and relatively stable air volume is achieved.

Description

technical field [0001] The invention relates to a fresh air system, in particular to a control method and system for constant air volume of the fresh air system. Background technique [0002] During the installation process of the fresh air systems currently on the market, due to the area, shape, and decoration layout of the user's house, the length, direction, and diameter of the fresh air pipes are different, and the damping during the fresh air transmission process is different. As a result, the same fresh air system has different air volumes in different users' homes. [0003] The existing technology usually controls the speed of the fan to a certain constant speed to achieve the purpose of controlling the air volume. However, due to the diversity of air ducts, changes in air humidity and air pressure, constant speed control often has certain limitations. And the control power supply generally adopts the structure and logic control method with Hall sensor to realize the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/89F24F11/88
CPCF24F11/64F24F11/88F24F11/89
Inventor 邵勇
Owner 普瑞氏(无锡)智能科技有限公司
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