Compressor cylinder cutting control method, device and unit and air conditioning system

A technology for air conditioning systems and compressors, applied in heating and ventilation control systems, compressors, compressors with reversible cycles, etc., can solve problems such as failure to cut cylinders, and achieve the effect of ensuring energy efficiency and improving user experience.
CN109185094AActive Publication Date: 2019-01-11GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GREE ELECTRIC APPLIANCES INC
Publication Date
2019-01-11

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Abstract

The invention discloses a compressor cylinder cutting control method, device and unit and an air conditioning system. The method comprises the following steps that a compressor is switched from a single-cylinder operation state to a double-cylinder operation state; whether the system pressure difference is in a first preset system pressure difference interval is judged; if no, system control parameters are adjusted so that the system pressure difference can be in the first preset system pressure difference interval; the compressor is controlled to be switched from the single-cylinder operationstate to the double-cylinder operation state; when the system differential pressure meets system pressure difference conditions required by the double-cylinder operation state of the compressor, thatis, the system pressure difference is in the first preset system pressure difference interval, the compressor is controlled to be switched from a single-cylinder operation state to a double-cylinderoperation state. The system pressure difference is stable, the compressor can be stably maintained in the double-cylinder operation state, energy efficiency of the unit is guaranteed, and user experience is improved.
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Description

Technical field

[0001] The present invention relates to the technical field of units, and in particular to a method, a device for controlling a compressor to cut cylinders, a unit and an air conditioning system. Background technique

[0002] At present, in order to solve the problems of low load and poor energy efficiency of multi-line groups, the single and double cylinder switching technology of the compressor has been developed. In the actual operation of the unit, the failure of the compressor to cut cylinders is more common. For example: When the unit is in the ultra-low temperature heating start phase (the ambient temperature is extremely low), the compressor often cannot be switched to two-cylinder operation. Another example: in the process of compressor cylinder cutting, due to changes in components such as the fan and electronic expansion valve in the unit, it is likely to affect the normal cylinder cutting of the compressor. The above conditions will cause the compres...

Claims

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