A centralized dual fan control system and control method

A control system and dual-fan technology, applied in pump control, mechanical equipment, non-variable pumps, etc., can solve the problem of excessive electrolytic capacitors in the harmonic test of air conditioning units, and achieve the effect of realizing the speed

Active Publication Date: 2017-07-21
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

[0003] The embodiment of the present invention provides a centralized dual-fan control system and control method to solve the problems in the prior art that the harmonic test of the air conditioning unit exceeds the standard and requires an additional electrolytic capacitor for power supply

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  • A centralized dual fan control system and control method
  • A centralized dual fan control system and control method
  • A centralized dual fan control system and control method

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0022] Such as figure 2 as shown, figure 2 It shows a centralized dual-fan control system, which is mainly used in air-conditioning units, including a main control board 1 and a driving board 2, wherein the main control board 1 is connected to an external AC input power supply, and the driving board 2 is respectively connected to the second A built-in DC fan (not shown) is connected to a second built-in DC fan (not shown) and supplies power to the two built-in DC fans through its internal DC bus. In addition, in order to drive the operation of the compression components in the air conditioning unit, the drive board 2 is also connected with the compressor 3 . The driving capability of the driving board 2 is strong, and the two built-in DC fans connected to it as loads have little in...

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Abstract

The invention discloses a centralized dual-fan control system and control method, wherein the control system includes a main control board and a drive board, wherein the drive board is respectively connected to the first built-in DC fan and the second built-in DC fan, and the drive board is equipped with There is a control chip and a rotational speed capture control circuit, the control chip is provided with a rotational speed capture control module, and the rotational speed capture control circuit is connected with the rotational speed capture module. The invention can reduce the harmonic interference and other electronic radiation generated by the external power grid, save the high-voltage electrolytic capacitors reserved by the main control board for the dual built-in DC fans, realize independent control of the dual built-in DC fans, and realize stepless adjustment of the speed.

Description

technical field [0001] The invention relates to a fan control system and a control method, in particular to a control system and a control method for a centralized double fan used in an air-conditioning unit. Background technique [0002] At present, the built-in DC fans of commercial air conditioners are powered and controlled by the main control board, such as figure 1 As shown, the topology of this control method is simple, but it seriously affects the harmonic component of the input current of the whole machine, and it is easy to cause the harmonic test of the whole machine to exceed the standard. In addition, the main control board often needs a dedicated high-voltage electrolytic capacitor to supply power to the dual built-in DC fans. Contents of the invention [0003] The embodiment of the present invention provides a centralized dual-fan control system and control method to solve the problems in the prior art that the harmonic test of the air conditioning unit exce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
Inventor 刘文斌
Owner GREE ELECTRIC APPLIANCES INC
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