Control method for fan having constant wind strength

A technology of fan control and constant air volume, applied in pump control, non-variable-capacity pumps, machines/engines, etc., can solve the problems of difficulty in fixing the ventilation volume, fatigue of spring elasticity, and the influence of uncorresponding measurement of wind pressure.

Active Publication Date: 2017-08-01
SUNONWEALTH ELECTRIC MACHINE IND
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  • Abstract
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Problems solved by technology

[0004] However, the ventilation volume of the ventilating fan is related to the opening area of ​​the damper and the wind pressure. The above-mentioned existing fan control method can only adjust the opening area of ​​the damper, and does not measure the influence of the wind pressure, and the spring that controls the air volume will have elastic fatigue. Difficult to fix ventilation volume

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  • Control method for fan having constant wind strength
  • Control method for fan having constant wind strength
  • Control method for fan having constant wind strength

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Embodiment Construction

[0035] In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, as follows:

[0036] Directional terms used throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer", " "side" and so on are mainly referring to the directions of the attached drawings, and the directional terms are only used to assist in explaining and understanding the various embodiments of the present invention, and are not intended to limit the present invention.

[0037] The "wind volume" mentioned throughout the present invention refers to the flow rate of air per unit time, such as: the total volume of air sent or sucked by a fan per minute, which can be understood by those with ordinary knowledge in the technical field of the present invention .

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Abstract

Herein, a control method for a fan having constant wind strength is disclosed for solving a problem that wind strength cannot be fixed. The method includes: 1) a constant speed step, in which a controller drives a motor to work according to a preset duty ratio and determines whether the work current of the motor is less than a target current or not, if true, performing the constant speed step, or if false, setting a work rotation speed and carrying out a torsion step; 2) the torsion step, wherein the controller acquires a traget duty ratio according to the first rotation speed, a second rotation speed, the work rotation speed, a first duty ratio and a second duty ratio, and drives the motor according to the torsion step to determine whether the rotation speed of hte motor is less than the second rotation speed, if true, setting the work speed as the rotation speed of the motor, and performing the torsion step, and if false, performing the constant speed step. By means of the technical scheme, the problems can be actually solved.

Description

technical field [0001] The present invention relates to a fan control method; in particular, to a constant air volume fan control method. Background technique [0002] Existing ventilator (or ventilator) can be driven by a motor to rotate the fan blades, so as to transport air to a space or a chamber of a device through a duct for ventilation or exhaust. For example, because the various gases generated by the process equipment in the clean room need to be pumped to different equipment through the exhaust device, when the air volume is too small or the air is insufficient, it may cause the equipment to shut down and stop production; when the air volume is too large , the process cost will increase due to the increase of the negative pressure in the clean room, so it is necessary to develop a ventilation fan with a constant air volume. [0003] The existing constant air volume fan control method can adjust the flip angle of the damper blades by means of springs, so as to auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00
CPCF04D27/004
Inventor 洪银树邱智翔林文杰
Owner SUNONWEALTH ELECTRIC MACHINE IND
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