Refrigerant-amount determination kit

A refrigerant-amount determination kit comprising:

• a temperature sensor that is mounted at least temporarily on a portion of a refrigeration cycle apparatus having a refrigerant circuit that includes a compressor, a condenser, and an evaporator, the temperature sensor being configured to detect a temperature of a refrigerant flowing in the refrigerant circuit;
• a heat insulation member that covers a periphery of the temperature sensor;
• a processor configured to determine an amount of a refrigerant in the refrigerant circuit based on a detection result detected by the temperature sensor during operation of the refrigeration cycle apparatus and acquire an outside air temperature at an installation place of the refrigeration cycle apparatus;
• and
• a memory,
• the temperature sensor including at least one of
• a first sensor group that includes a first temperature sensor configured to detect a condensation temperature of the refrigerant in the refrigerant circuit and a second temperature sensor configured to detect a temperature of the refrigerant at an outlet of the condenser of the refrigerant circuit, and
• a second sensor group that includes a third temperature sensor configured to detect an evaporation temperature of the refrigerant in the refrigerant circuit and a fourth temperature sensor configured to detect a temperature of the refrigerant at an outlet of the evaporator of the refrigerant circuit,
• the processor being configured to calculate a degree of subcooling by using a measurement value of the first refrigerant temperature sensor and a measurement value of the second refrigerant temperature sensor identified during a stable operation of the refrigeration cycle apparatus, or a degree of superheating by using a measurement value of the third refrigerant temperature sensor and a measurement value of the fourth refrigerant temperature sensor identified during the stable operation of the refrigeration cycle apparatus,
• the memory being configured to store reference degrees of subcooling, which are degrees of subcooling when the refrigerant amount of the refrigerant circuit is proper, in association with the outside air temperature or reference degrees of superheating, which are degrees of superheating when the refrigerant amount of the refrigerant circuit is proper, in association with the outside air temperature, and
• the processor being configured to
• determine whether the amount of the refrigerant in the refrigerant circuit is proper by comparing the calculated degree of subcooling with the reference degree of subcooling associated with the acquired outdoor temperature, or
• determine whether the amount of the refrigerant in the refrigerant circuit is proper by comparing the calculated degree of superheating with the reference degree of superheating associated with the acquired outdoor temperature, wherein
• the first temperature sensor of the first sensor group is mounted on a heat transfer tube of the condenser,
• the second temperature sensor of the first sensor group is mounted on a refrigerant pipe of the refrigerant circuit,
• the third temperature sensor of the second sensor group is mounted on a heat transfer tube of the evaporator, and
• the fourth temperature sensor of the second sensor group is mounted on a refrigerant pipe of the refrigerant circuit.