Method and device for controlling capacity change of compressor, and smart home appliance

A device for controlling a capacity change of a compressor, the device comprising:

• a determination unit configured to determine whether a capacity of the compressor is required to be changed, and if yes, to determine a capacity-change frequency;
• a capacity changing unit configured to change the capacity of the compressor while an operating frequency of the compressor is at the capacity-change frequency;
• and
• wherein the determination unit is configured for:
• determining whether the capacity of the compressor is required to be changed to increase or decrease;
• when the capacity is to be changed to decrease, selecting a smaller one from a first frequency, before a frequency change, of the compressor, and a second frequency, after the frequency change, of the compressor, as the capacity-change frequency;
• and
• when the capacity is to be changed to increase, selecting a frequency smaller than the first frequency as the capacity-change frequency.

A smart home appliance comprising:

• a compressor;
• a processor;
• and
• a memory storing instructions that are executable by the processor;
• wherein by executing the instructions, the processor is configured for:
• determining whether a capacity of the compressor is required to be changed;
• if yes, determining a capacity-change frequency;
• changing the capacity of the compressor while an operating frequency of the compressor is at the capacity-change frequency;
• wherein the determining the capacity-change frequency comprises:
• determining whether the capacity of the compressor is required to be changed to increase or decrease;
• when the capacity is to be changed to decrease, selecting a smaller one from a first frequency, before a frequency change, of the compressor, and a second frequency, after the frequency change, of the compressor, as the capacity-change frequency;
• and
• when the capacity is to be changed to increase, selecting a frequency smaller than the first frequency as the capacity-change frequency.