Patent ID: 11906185
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 23:
24. 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.