Air conditioning system, refrigerant amount estimation method for air conditioning system, air conditioner, and refrigerant amount estimation method for air conditioner

A refrigerant amount estimation method that is implemented by an air conditioning system that includes

• an air conditioner that includes
• a refrigerant circuit that is constituted to have a structure in which at least one indoor unit is connected to an outdoor unit by a refrigerant pipe and a predetermined amount of refrigerant is filled, and
• a server that is communicably connected to the air conditioner, the refrigerant amount estimation method for the air conditioning system comprising:
• detecting, performed by first processing circuitry included in the air conditioner, a state quantity related to control of the air conditioner;
• acquiring, performed by the first processing circuitry included in the air conditioner, a detection value of the detected state quantity;
• transmitting, performed by the first processing circuitry included in the air conditioner, the acquired detection value to the server;
• receiving, performed by second processing circuitry included in the server, the detection value from the air conditioner;
• determining, performed by the second processing circuitry included in the server, whether or not a detection value of a first feature value is a detection value that is to be used to estimate a remaining refrigerant amount in a case where a state quantity related to an amount of the refrigerant that is filled in the refrigerant circuit is indicated by the first feature value;
• and
• estimating, performed by an the second processing circuitry included in the server, the remaining refrigerant amount of the refrigerant that remains in the refrigerant circuit by using the detection value of the first feature value.

An air conditioner that includes a refrigerant circuit that is constituted to have a structure in which at least one indoor unit is connected to an outdoor unit by a refrigerant pipe and a predetermined amount of refrigerant is filled, the air conditioner comprising:

• an first memory;
• and first processing circuitry coupled to the first memory and configured to:
• detect a state quantity related to control of the air conditioner;
• acquire a detection value that has been detected by the detecting;
• estimate a remaining refrigerant amount of the refrigerant that remains in the refrigerant circuit by using a detection value of a first feature value in a case where a state quantity related to an amount of the refrigerant that is filled in the refrigerant circuit is indicated by the first feature value;
• and
• determine whether or not the detection value of the first feature value is a detection value that is to be used to estimate the remaining refrigerant amount performed by the estimating.

A refrigerant amount estimation method for estimating a remaining refrigerant amount in an air conditioner that includes a refrigerant circuit that is constituted to have a structure in which at least one indoor unit is connected to an outdoor unit by a refrigerant pipe and a predetermined amount of refrigerant is filled or estimating a remaining refrigerant amount in an air conditioning system that includes the air conditioner, the refrigerant amount estimation method for the air conditioner comprising:

• detecting a state quantity related to control of the air conditioner;
• acquiring a detection value of the detected state quantity;
• determining whether or not a detection value of a first feature value is a detection value that is to be used to estimate the remaining refrigerant amount in a case where a state quantity related to an amount of the refrigerant that is filled in the refrigerant circuit is indicated by the first feature value;
• and
• estimating the remaining refrigerant amount of the refrigerant that remains in the refrigerant circuit by using the detection value of the first feature value.