Air conditioning apparatus

An air conditioning apparatus for air conditioning a given space comprising:

• a refrigerating circuit including a compressor, an expansion valve, a first heat-exchanger disposed outside of said space and a second heat-exchanger disposed inside of said space, the flow rate of refrigerant in said refrigerating circuit being controlled by the expansion valve,
• a detector means for detecting a leakage of refrigerant in said refrigerating circuit, said detector means including (a) first detector means for detecting the load condition of the refrigerating cycle, said first detector means including a first sensor for measuring the load condition, (b) second detector means for sensing the temperature of the refrigerant in the refrigerating circuit and (c) third detector means for sensing the degree of opening of said expansion valve, said second detector means comprising a first sensor for sensing the discharged temperature of the refrigerant fed from said compressor, a third sensor for sensing the temperature of the refrigerant entering said compressor and a fourth sensor for sensing the saturation temperature of the refrigerant in said refrigerating circuit;
• and
• control means responsive to said detector means for controlling the operation of said compressor, said control means generating a signal for stopping the operation of said compressor when the load condition sensed by said first sensor is below a first predetermined level and the temperature sensed by said second sensor exceeds a second predetermined level and said third sensor detects the full open setting condition of said expansion valve.

An air conditioning apparatus for air conditioning a given space comprising:

• a refrigerating circuit including a compressor, an expansion valve, a first heat-exchanger disposed outside of said space and a second heat-exchanger disposed inside of said space, the flow rate of refrigerant in said refrigerating circuit being controlled by the expansion valve,
• a detector means for detecting a leakage of refrigerant in said refrigerating circuit, said detector means including (a) first detector means for detecting the load condition of the refrigerating cycle, (b) second detector means for sensing the temperature of the refrigerant in the refrigerating circuit and (c) third detector means for sensing the degree of opening of said expansion valve, said first detector means comprising a first sensor for sensing the temperature of the outside space, said second detector means comprising a second sensor for sensing the discharged temperature of the refrigerant fed from said compressor, a third sensor for sensing the temperature of the refrigerant taking into said compressor and a fourth sensor for sensing saturation temperature of the refrigerant in said refrigerating circuit;
• and
• control means responsive to said detector means for controlling the operation of said compressor, said control means generating a signal for stopping the operation of said compressor when the temperature sensed by said first sensor is below a first predetermined level and the temperature sensed by said second sensor exceeds a second predetermined level and said third sensor detects the full open setting condition of said expansion valve.