Method and device for controlling air conditioner, air conditioner and computer readable storage medium

By calculating and controlling the number of cutting valves and adjusting the compressor unloading control logic of the multi-compressor centrifugal common system air conditioner, the problem of difficulty in controlling the shutdown of a single compressor during the shutdown process is solved, and more efficient compressor unloading is achieved.

CN119665373AActive Publication Date: 2025-03-21QINGDAO HAIER INTELLIGENT BUILDING TECHNOLOGY CO LTD +4
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Patent Information

Application Number
CN202311209097.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-19
Publication Date
2025-03-21
Estimated Expiration
2043-09-19

AI Technical Summary

Technical Problem

Multi-compressor centrifugal common system air conditioners are difficult to control the shutdown of a single compressor during shutdown, resulting in the compressor being unable to be fully unloaded.

Method used

By calculating the number n of the cutting valves to be opened, the n cutting valves are controlled to open and close according to the exhaust volume Q of the cutting valve to be stopped and the maximum refrigerant flow rate Q1 required for the shutdown compressor to be stopped, and the control logic for the unloading of the compressor is adjusted.

Benefits of technology

It realizes that the control logic of compressor unloading is changed without changing the structural design, so that the compressor unloading is sufficient, and the operation efficiency of the air conditioner is improved.

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Abstract

The invention discloses a method for controlling an air conditioner, the air conditioner comprises an evaporator, a plurality of compressors and a plurality of cut-in valves, the number of the compressors is the same as that of the cut-in valves, and each cut-in valve is arranged between an exhaust pipeline of the corresponding compressor and a barrel of the evaporator; the method comprises the steps that in response to a shutdown instruction of a compressor to be shut down, the number n of cut-in valves to be opened is calculated according to the gas displacement Q of the cut-in valves to be shut down and the highest refrigerant circulation Q1 needed by shutdown of the compressor to be shut down; under the condition that the cut-in valve opening condition is met, n cut-in valves to be opened are controlled to be opened, and the opened cut-in valves comprise cut-in valves to be shut down; under the condition that the cut-in valve closing condition is met, the opened cut-in valve is controlled to be closed; wherein the cut-in valve to be shut down corresponds to the compressor to be shut down and is arranged between an exhaust pipeline of the compressor to be shut down and the evaporator barrel. Under the condition that the structural design is not changed, the control logic of unloading of the compressor is changed, so that the compressor is fully unloaded.
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