초록 ▼

A refrigeration cycle is a closed cycle constituted by a variable power compressor, a four-way valve, an indoor heat exchanger, an expansion valve and an outdoor heat exchanger. Air-conditioned air is supplied from the refrigeration cycle to a plurality of rooms to be subjected to air conditioning t

A refrigeration cycle is a closed cycle constituted by a variable power compressor, a four-way valve, an indoor heat exchanger, an expansion valve and an outdoor heat exchanger. Air-conditioned air is supplied from the refrigeration cycle to a plurality of rooms to be subjected to air conditioning through a supply duct at a portion near a supply opening for supplying the air-conditioned air to a corresponding one of the rooms and controls a flow amount of the air-conditioned air supplied from the supply opening. Air is returned from each room to the refrigeration cycle through a return duct. The indoor heat exchanger of the refrigeration cycle has a temperature sensor for detecting the temperature of the indoor heat exchanger. A system controller controls a drive frequency of the variable power compressor of the refrigeration cycle in accordance with a difference between the temperature of the indoor heat exchanger detected by the temperature sensor and a preset temperature of the indoor heat exchanger.

대표청구항 ▼

A duct type air conditioner comprising: heat exchanging means for receiving one of a high-temperature high-pressure refrigerant gas and a low-temperature low-pressure liquid refrigerant and heat-exchanging one of the received refrigerant gas and the received liquid refrigerant with air, thereby extr

A duct type air conditioner comprising: heat exchanging means for receiving one of a high-temperature high-pressure refrigerant gas and a low-temperature low-pressure liquid refrigerant and heat-exchanging one of the received refrigerant gas and the received liquid refrigerant with air, thereby extracting one of condensation heat and evaporation heat; duct means for circulating air between a plurality of regions to be air-conditioned to be subjected to air conditioning and said heat exchanging means; a plurality of air volume control means, independently provided in said plurality of regions to be air-conditioned, for controlling a flow amount of air supplied rom said heat exchanging means through said duct means, wherein each said air volume control means comprises: means for controlling the flow amount of air in accordance with a difference between an intraregion temperature of a corresponding region to be air-conditioned and a set intraregion temperature and a holding time of the difference; and means for changing the flow amount of air when the difference between the intraregion temperature of the corresponding region to be air-conditioned and the set intraregion temperature does not fall within a second predetermined rage and the holding time of the difference exceeds a second predetermined time; temperature detecting means for detecting a temperature of the refrigerant obtained by heat exchange of one of the refrigerant gas and the liquid refrigerant with air performed by said heat exchanging means; control means for controlling a flow amount of one of the refrigerant gas and the liquid refrigerant to be supplied to said heat exchanging means in accordance with a difference between the temperature of the refrigerant detected by said temperature detecting means and a first set temperature and a holding time of the difference; and means for causing said control means to control the flow amount of one of the refrigerant gas and the liquid refrigerant before said plurality of air volume control means control the flow amounts of air.