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Frequency-adjusting method and device of multi-compressor system

A frequency regulation and multi-compressor technology, which is applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve problems such as unstable operation of multi-compressor systems and inability to effectively coordinate the operating frequencies of different compressors

Inactive Publication Date: 2017-12-19
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0005] Embodiments of the present invention provide a frequency adjustment method and device for a multi-compressor system to solve the problem that existing methods cannot effectively coordinate the operating frequencies of different compressors in a multi-compressor system, resulting in unstable operation of the multi-compressor system technical issues

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0023] Considering that the existing method has not yet proposed an effective method for cooperatively adjusting the frequencies of the various compressors in the multi-compressor system. When the existing method is actually implemented, the frequency of a single compressor can only be adjusted through the PID algorithm or the water temperature step-by-step algorithm alone, and the frequency difference of other compressors cannot be taken into consideration. As a result, in a system, the difference between the operating frequencies of different compressors may be very large, which in turn forms...

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Abstract

The invention provides a frequency-adjusting method and device of a multi-compressor system. The frequency-adjusting method comprises the steps that the operating frequency of each compressor in a to-be-adjusted system is obtained; according to the operating frequency of each compressor, the absolute value of the difference value among the operating frequencies of the different compressors is determined; the absolute value of the difference value among the operating frequencies of the different compressors is compared with a first threshold value, and a first comparative result is obtained; and according to the first comparative result, corresponding frequency adjustment is conducted on the different compressors in the to-be-adjusted system. According to the frequency-adjusting method of the multi-compressor system, the frequency difference situation among the operating frequencies of the different compressors in the multi-compressor system is judged by setting the first threshold value, and according to the frequency difference situation, corresponding frequency adjustment is conducted on the different compressors. The technical problem that the multi-compressor system is unstable to operate due to the fact that the operating frequency of the different compressors in the multi-compressor system cannot be coordinated effectively existing in an existing method is solved.

Description

technical field [0001] The present invention relates to the technical field of system frequency control, in particular to a frequency adjustment method and device for a multi-compressor system. Background technique [0002] As technology develops, multi-compressor systems are becoming more and more common. For example, currently some air conditioning systems are provided with multiple compressors. When operating the above-mentioned system, it is often necessary to control the multiple compressors in the above-mentioned system to increase their frequency to a preset conditional frequency, so that the system can work normally. However, in actual implementation, the compressors in the system are different, and the corresponding operating frequencies are often not exactly the same. [0003] At present, the existing frequency adjustment methods usually use a PID (Proportion Integral Differential) algorithm or a water temperature step-by-step algorithm to individually adjust the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 张利陈万兴郭双林周葆林柳文波
Owner GREE ELECTRIC APPLIANCES INC
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