Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a refrigeration cycle through which refrigerant is circulated;
• and
• an indoor unit accommodating at least an indoor heat exchanger of the refrigeration cycle, the indoor unit being disposed in an indoor space;
• and
• the refrigerant being a flammable refrigerant with a density greater than a density of air under atmospheric pressure,
• the indoor unit including an air-sending fan, an air inlet through which air of the indoor space is sucked in, an air outlet through which the air sucked in through the air inlet is blown out to the indoor space, and a vertical air deflector vane located at the air outlet,
• the air-conditioning apparatus being configured to dilute leaked refrigerant by operation of the air-sending fan and to blow out the air upward through the air outlet by the vertical air deflector vane,
• when M [kg] represents an amount of charge of the refrigerant in the refrigeration cycle, LFL [kg/m3] represents a lower flammable limit of the refrigerant, A [m2] represents a floor area of the indoor space, Ho [m] represents a height of the air outlet above a floor surface of the indoor space, and Hc [m] represents a height of a ceiling surface above the floor surface of the indoor space, the amount of charge M, the lower flammable limit LFL, the floor area A, the height Ho, and the height Hc satisfying a relationship of LFL×A×Ho≦M<LFL×A×Hc.

A refrigerant amount setting method of an air-conditioning apparatus,

• the air-conditioning apparatus including
• a refrigeration cycle through which refrigerant is circulated, and
• an indoor unit accommodating at least an indoor heat exchanger of the refrigeration cycle, the indoor unit being disposed in an indoor space,
• the refrigerant being a flammable refrigerant with a density greater than a density of air under atmospheric pressure,
• the indoor unit including an air-sending fan, an air inlet through which air of the indoor space is sucked in, and an air outlet through which the air sucked in through the air inlet is blown out to the indoor space,
• the air-conditioning apparatus being configured to dilute leaked refrigerant by operation of the air-sending fan,
• the refrigerant amount setting method of the air-conditioning apparatus comprising setting an amount of the refrigerant of the air-conditioning apparatus,
• the setting including,
• when M [kg] represents an amount of charge of the refrigerant in the refrigeration cycle, LFL [kg/m3] represents a lower flammable limit of the refrigerant, A [m2] represents a floor area of the indoor space, and Ho [m] represents a height of the air outlet above a floor surface of the indoor space, setting the amount of charge M so that the amount of charge M, the lower flammable limit LFL, the floor area A, and the height Ho satisfy a relationship of M<LFL×A×Ho.

A refrigerant amount setting method of an air-conditioning apparatus,

• the air-conditioning apparatus including
• a refrigeration cycle through which refrigerant is circulated, and
• an indoor unit accommodating at least an indoor heat exchanger of the refrigeration cycle, the indoor unit being disposed in an indoor space,
• the refrigerant being a flammable refrigerant with a density greater than a density of air under atmospheric pressure,
• the indoor unit including an air-sending fan, an air inlet through which air of the indoor space is sucked in, an air outlet through which the air sucked in through the air inlet is blown out to the indoor space, and a vertical air deflector vane located at the air outlet,
• the air-conditioning apparatus being configured to dilute leaked refrigerant by operation of the air-sending fan and to blow out the air upward through the air outlet by the vertical air deflector vane,
• the refrigerant amount setting method of the air-conditioning apparatus comprising setting an amount of the refrigerant of the air-conditioning apparatus,
• the setting including,
• when M [kg] represents an amount of charge of the refrigerant in the refrigeration cycle, LFL [kg/m3] represents a lower flammable limit of the refrigerant, A [m2] represents a floor area of the indoor space, Ho [m] represents a height of the air outlet above a floor surface of the indoor space, and Hc [m] represents a height of a ceiling surface above the floor surface of the indoor space, setting the amount of charge M so that the amount of charge M, the lower flammable limit LFL, the floor area A, the height Ho, and the height Hc satisfy a relationship of LFL×A×Ho≦M<LFL×A×Hc.