Rotating speed control method and device of brushless DC fan, fan and refrigerator

A DC fan and control method technology, applied in the direction of pump control, machine/engine, mechanical equipment, etc., can solve the problems of different speeds, poor consistency of refrigeration speed of refrigerators, etc., and achieve duty cycle reduction and duty cycle adjustment Accurate measurement and noise reduction effect

Inactive Publication Date: 2015-01-07
HEFEI MIDEA REFRIGERATOR CO LTD
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  • Abstract
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Problems solved by technology

[0003] Moreover, the current BLDC fan has the following problems: 1. When the driving voltage of the fan is the same, its rotational speed is different; The rota

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  • Rotating speed control method and device of brushless DC fan, fan and refrigerator
  • Rotating speed control method and device of brushless DC fan, fan and refrigerator
  • Rotating speed control method and device of brushless DC fan, fan and refrigerator

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[0043] In order to be able to understand the above objectives, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

[0044] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited to the specific details disclosed below. Limitations of the embodiment.

[0045] figure 2 It shows a schematic flow chart of a method for controlling the speed of a brushless DC fan according to an embodiment of the present invention.

[0046] Such as figure 2 As shown, a met...

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Abstract

The invention provides a rotating speed control method and device of a brushless DC fan, the brushless DC fan and a refrigerator. The rotating speed control method of the brushless DC fan comprises the following steps: detecting the real-time rotating speed of the brushless DC fan; comparing the real-time rotating speed with a target rotating speed; adjusting the current duty ratio of the driving voltage of the brushless DC fan according to the comparison result, so as to adjust the real-time rotating speed to be matched with the target rotating speed. According to the technical scheme, the rotating speed control method of the brushless DC fan has the advantages that the duty ratio of the driving voltage of the fan can be accurately controlled, thus the output voltage of the fan can be accurately controlled, and as a result, the accurate control of the rotating sped of the fan is realized, and the noise of the refrigerator is minimized.

Description

technical field [0001] The invention relates to the technical field of fans, in particular to a method for controlling the speed of a brushless DC fan, a device for controlling the speed of a brushless DC fan, a brushless DC fan and a refrigerator. Background technique [0002] At present, the BLDC (Brushless Direct Current, brushless DC) fan installed on the refrigerator has a relatively large tolerance (usually ±10%). However, the rated voltage of the brushless DC fan is usually 12V, and the speed is usually 2000rpm. Therefore, the speed error of the brushless DC fan is ±200rpm. However, when the speed error of the brushless DC fan is ±200rpm, the noise of the refrigerator will be very loud, such as figure 1 shown. Additionally, from figure 1 It can be seen that the lower the speed of the brushless DC fan, the lower the noise is not necessarily. Therefore, choosing an appropriate fan speed will greatly improve the noise reduction of the refrigerator. [0003] Moreover,...

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Application Information

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IPC IPC(8): F04D27/00
CPCF04D27/00
Inventor 刘富明王剑符秀亮孙超祝云飞陈鹏张志
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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