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Centralized control system and method for double draught fans

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: 2016-01-20
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Centralized control system and method for double draught fans
  • Centralized control system and method for double draught fans
  • Centralized control system and method for double draught fans

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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] like 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 influ...

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PUM

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Abstract

The invention discloses a centralized control system and method for double draught fans. The control system comprises a main control panel and a drive board. The drive board is connected with the first built-in direct-current draught fan and the second built-in direct-current draught fan. A control chip and a rotation speed acquisition control circuit are arranged in the drive board. A rotation speed acquisition control module is arranged in the control chip. The rotation speed acquisition control circuit is connected with the rotation speed acquisition control module. By the adoption of the centralized control system and method, the harmonic interference and other electronic radiation generated by an external power grid can be reduced, a high-voltage electrolytic capacitor reserved for the double built-in direct-current draught fans by the main control panel is omitted, the double built-in direct-current draught fans can be independently controlled, and the stepless adjustment of the rotation speed is achieved.

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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IPC IPC(8): F04D27/00
Inventor 刘文斌
Owner GREE ELECTRIC APPLIANCES INC
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