State analyzer system and state analysis device

A state analyzer system comprising:

• an air-conditioning apparatus including
• a refrigerant circuit including a compressor and an expansion unit,
• the air-conditioning apparatus being configured to detect a state of refrigerant in the refrigerant circuit as state data while the compressor is running, and
• a controller configured to control the compressor and the expansion unit;
• and
• a state analyzer device comprising a processor,
• the processor of the state analyzer device being configured to:
• acquire the state data and control data from the controller of the air-conditioning apparatus,
• determine and continuously update a plurality of pieces of specific state information by using the state data and the control data, the control data indicating a content of control performed by the controller, the plurality of pieces of specific state information each representing, as a point, a state of the refrigerant at each of a plurality of specific positions in the refrigeration circuit, and being located in a state space defined by a pressure of the refrigerant and an enthalpy;
• determine, by using the state data and the control data, a plurality of normal regions in the state space within which each of the plurality of pieces of specific state information is present when the air-conditioning apparatus operates under a normal state;
• and
• based on a positional relationship of each of the plurality of pieces of specific state information of the refrigerant in the refrigerant circuit as the compressor is running and the corresponding one of the plurality of normal regions, determine whether the air-conditioning apparatus has an abnormality.

A state analysis device that analyzes a state of an air-conditioning apparatus by using state data and control data and controls a display, which is provided outside, to display an analysis result, the air-conditioning apparatus including a refrigerant circuit including a compressor and an expansion unit and a controller configured to control the compressor and the expansion unit, the state data indicating a state of refrigerant in the refrigerant circuit while the compressor is running, the control data indicating a content of control performed by the controller, the state analysis device comprising a processor being configured to:

• acquire the state data and the control data from the controller of the air-conditioning apparatus,
• determine and continuously update specific state information by using the state data and the control data, the plurality of pieces of specific state information each representing, as a point, a state of the refrigerant at each of a plurality of specific positions in the refrigeration circuit, and being located in a state space defined by a pressure of refrigerant and an enthalpy;
• determine, by using the state data and the control data, a plurality of normal regions in the state space within which each of the plurality of pieces of specific state information is present when the air-conditioning apparatus operates under a normal state;
• and
• control the display to display a diagnostic image including the plurality of pieces of specific state information of the refrigerant in the refrigerant circuit as the compressor is running, and simultaneously superimposed thereon a plurality of normal regions.