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Multi-connection fan control method, control device and air conditioner

A control method and multi-connection technology, applied in the field of air conditioners, multi-connection fan control methods, and devices, can solve the problems of noise reduction effectiveness discount, motor load asymmetry, not fully applicable to multi-connection, etc., and achieve good overall performance and Quiet effect, overcoming uneven air volume, good overall unit performance

Active Publication Date: 2020-07-03
NINGBO AUX ELECTRIC
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AI Technical Summary

Problems solved by technology

[0004] Although the two improvements can achieve a certain noise reduction function, the former needs to increase the types of fans. At the same time, the number of blades and the inconsistent shape of the blades will aggravate the uneven air volume in different parts of the same unit, which will affect the heat exchange. Asymmetry will lead to instability of the electrical parameters of the whole machine; while the latter is only a fixed difference in speed, the fixed difference will still form a stable superposition of vibration waveforms and sound waves, resulting in greatly reduced effectiveness of noise reduction, and There are differences among multi-connections, and different multi-connections need to correspond to different differential treatments, so that the fixed difference processing cannot be fully applied to all multi-connections, which makes the adaptability of this improved method poor, and this method will also lead to the same unit. Uneven air volume in different parts

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  • Multi-connection fan control method, control device and air conditioner
  • Multi-connection fan control method, control device and air conditioner
  • Multi-connection fan control method, control device and air conditioner

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Embodiment Construction

[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] The protected multi-line unit of the present invention has i fans, and the value of i is 2≤i≤3. Of course, the specific value of i is determined by actual production needs. When the multi-line is running, the specific control method is as follows:

[0034] S1, first detect the initial speed of each fan, and record the speed of each fan as x ij , j∈[1,i]; of course, in the production design, it is preferred to make the initial speed of each fan equal, that is, x il =x i2 =...=x ij =...=x ii .

[0035] S2, control the speed f of i fans ij At the initial speed x ijThe pulsating periodic change is performed as the benchmark, and the direction of the speed change of adjacent fa...

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Abstract

The invention provides a multi-online draught fan control method. i draught fans are arranged, wherein i is larger than or equal to 2 and smaller than or equal to 3. The multi-online draught fan control method comprises the steps that the initial rotating speeds of the i draught fans are detected and denoted as x<ij>, wherein j is an element of a set, namely [2,i]; and the rotating speeds f<ij> ofthe i draught fans are controlled to be subjected to pulse-type periodic change based on the initial rotating speeds x<ij>, and the rotating speed change directions of the adjacent draught fans are opposite. According to the multi-online draught fan control method, the superposition action of sound waves and vibration can be effectively prevented, the good noise reduction effect is achieved, andthe property of a complete machine unit is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a multi-connected fan control method and device and a corresponding air conditioner. Background technique [0002] At present, household air conditioners mostly adopt a multi-connected structure, that is, there are two or more outdoor fans. When multiple fans rotate at the same speed, resonance will occur due to the consistency of structure and frequency, which will cause the superposition of sound waves and vibration waveforms among multiple fans, forming beat vibration and generating noise. In order to reduce noise, researchers have tried to silence the noise in many ways. [0003] For example, if an asymmetric fan blade structure is designed, as shown in Figure 1(a), multiple fan units use different blades and leaf shape combinations to make the natural frequencies of the fans different, thereby reducing resonance during operation; There are obvious deviations in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/77F24F11/64
CPCY02B30/70
Inventor 古汤汤任小辉黄春刘合心陈华
Owner NINGBO AUX ELECTRIC
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