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Method and system for controlling frequency switch of multi-connected air conditioner

A multi-connected air conditioner and frequency switching technology, which is applied to heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve the problems of complex control process and large test volume, so as to reduce the test workload and control the process. easy-to-use effects

Active Publication Date: 2009-12-30
HAIER GRP CORP +1
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Problems solved by technology

Each test condition must be fully verified, which requires a large amount of tests and makes the control process very complicated

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  • Method and system for controlling frequency switch of multi-connected air conditioner
  • Method and system for controlling frequency switch of multi-connected air conditioner
  • Method and system for controlling frequency switch of multi-connected air conditioner

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with specific drawings and embodiments.

[0031] The multi-connected air conditioner of the present invention adopts a combined design of multiple outdoor units, including one or more compressors. During the operation, it is necessary to ensure that each compressor can coordinate and match the operation, which can not only give full play to the performance of each module, but also realize stable and reliable operation, and avoid frequent start-stop switching of the compressor, which will cause damage to the compressor.

[0032] The multi-connected air conditioner frequency switching control method of the present invention generates the expected operating frequency value of the multi-connected air conditioner according to the actual operating frequency value of the multi-connected air conditi...

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Abstract

The invention discloses a method and a system for controlling the frequency switch of a multi-connected air conditioner. The method comprises the following steps: obtaining a practical running frequency value of a multi-connected air conditioner compressor by detection; obtaining a practical pressure value of the multi-connected air conditioner by detection; judging whether the practical pressure value reaches a preset target pressure value or not, if so, finishing the frequency modulation process of the multi-connected air conditioner, and otherwise, carrying out frequency modulation according to the preset target pressure value; confirming a frequency variation value of the multi-connected air conditioner according to a frequency modulation result obtained by the frequency modulation of the preset target pressure value; adding up the detected practical running frequency value and the frequency variation value to generate an expected frequency value of the multi-connected air conditioner; comparing the expected frequency value of the multi-connected air conditioner with a preset frequency switch threshold value and allotting the running frequency of a host machine and a submachine of the multi-connected air conditioner in a preset calculation way. The method and the system for controlling the frequency switch of the multi-connected air conditioner can rapidly, simply and conveniently realize the frequency switch of the multi-connected air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioner control, in particular to a multi-connected air conditioner frequency switching control method and system. Background technique [0002] With the popularization and application of frequency conversion technology, the multi-connected air conditioner system has developed rapidly. Compared with ordinary air conditioners, multi-connected air conditioners have the advantages of fast and powerful cooling and heating, high efficiency and energy saving, comfort and reliability, etc. It has been widely used in the market. [0003] The compressor is the most critical component in a multi-connected air conditioner. The effective control of compressor operation according to the characteristics of the compressor has a direct relationship with the energy saving of the system. According to the characteristics of multi-connected air conditioners, it can be seen that when multi-connected air conditioner...

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Application Information

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IPC IPC(8): F24F11/00F25B49/02
Inventor 国德防涂虬毛守博杜鹏何建奇
Owner HAIER GRP CORP
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