Heat pump system and control method thereof

A heat pump system, comprising:

• an indoor unit, comprising:
• an air conditioning unit provided with an air conditioning unit throttling device and an air conditioning unit indoor heat exchanger;
• a refrigeration cabinet unit provided with a refrigeration cabinet unit throttling device and a refrigeration cabinet unit indoor heat exchanger;
• an outdoor unit, comprising:
• a compressor unit;
• an outdoor heat exchange unit, comprising an outdoor heat exchanger and an outdoor throttling device;
• a switching device for selectively connecting the exhaust end of the compressor unit to one of the air conditioning unit and the outdoor heat exchange unit;
• and
• an outdoor throttling device side of the outdoor heat exchange unit;
• and
• a controller configured to:
• control the heat pump system to execute at least two modes comprising a single air conditioning refrigeration mode, a single refrigeration cabinet refrigeration mode, an air conditioning and refrigeration cabinet dual refrigeration mode, a single air conditioning heating mode, an all heat recovery mode, and/or a partial heat recovery mode;
• and
• control the heat pump system to switch between the at least two modes after a certain time delay.