Air-conditioning system

An air-conditioning system comprising:

• an air-conditioning unit that supplies air-conditioned air to a plurality of spaces;
• a unit body that forms an outline of the air-conditioning unit;
• an air-conditioner that performs temperature control of air taken into the unit body;
• one or more air blowers that blow, to an outside of the unit body, air having been blown out from the air-conditioner;
• and
• a controller that controls the air-conditioner,
• wherein the controller (i) determines an air-conditioner set temperature to cause an air-conditioner temperature difference, which is a temperature difference between an inlet temperature, which is a temperature of air suctioned by the air-conditioner, and the air-conditioner set temperature set to the air-conditioner, to have a larger value than an air-conditioning stopping determination temperature difference that defines a temperature difference at which an air-conditioning operation is stopped, and (ii) causes the air-conditioner to perform an air-conditioning operation with the air-conditioner set temperature having been determined, and
• wherein the controller (i) determines an air-conditioning requirement amount for each of the plurality of spaces based on a temperature difference between a temperature of the space and an indoor set temperature set for the space, and (ii) causes the air-conditioner to stop the air-conditioning operation when all of a first condition in which the air-conditioning requirement amount having been determined becomes less than or equal to a first reference temperature in all of the spaces, a second condition in which the air-conditioning requirement amount having been determined becomes less than or equal to a second reference temperature in at least one of the spaces, and a third condition in which an air-conditioning operating time of the air-conditioner becomes greater than or equal to a predetermined time in a state where a mean value of the air-conditioning requirement amounts having been determined becomes less than or equal to a third reference temperature are satisfied.