Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner

A variable capacity compressor operation mode determination method, comprising:

• controlling a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before switching an operation mode of the compressor;
• detecting a current value of the compressor at present as A1 before the switching of the operation mode of the compressor;
• switching the operation mode of the compressor, and after a preset time period, detecting the current value of the compressor at present as A2;
• and
• comparing A1 with A2, and determining that the switching of the operation mode of the compressor is successful when the compressor is switched to an operation mode in which a number of cylinders in a working state is increased and a relationship between A1 and A2 satisfies a preset condition A2≥m*A1, wherein m≥1, and determining that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies the preset condition.

A variable capacity compressor operation mode determination method, comprising:

• controlling a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before switching an operation mode of the compressor;
• detecting a current value of the compressor at present as A1 before the switching of the operation mode of the compressor;
• switching the operation mode of the compressor, and after a preset time period, detecting the current value of the compressor at present as A2;
• and
• comprising:
• comparing A1 with A2, and determining that the switching of the operation mode of the compressor is successful when the compressor is switched to an operation mode in which a number of cylinders in a working state is reduced and the ratio relationship between A1 and A2 satisfies a preset condition A2≤A1/m, wherein m≥1, and determining that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies the preset condition.