Abstract: An air conditioning apparatus which includes a single heat source device and plural indoor units including indoor heat exchangers. Some of the indoor units include a fan for introducing outdoor air, while others include a fan for circulating indoor air. In addition, a controller is provided for controlling operation of one or more of the indoor units to carry out heating, cooling or ventilation in response to a determination of the operation of one or more other indoor units.

Abstract: An air conditioning system in which a single heat source unit (A) comprising a compressor (1), a four-way valve (2), a heat source unit side heat exchanger (3) and an accumulator (4) is connected to a plurality of indoor units (B, C, D) through a first and a second connection pipes (6, 7) Each indoor unit (B, C, D) comprises a suction air temperature detecting device (50) for detecting a suction air temperature of the indoor unit, an opening degree setting device for setting a minimum valve opening degree of the first flow rate controller 9 in accordance with the difference between the target temperature and the suction air temperature and a first valve opening degree control device (52) for controlling the valve opening degree of the first flow rate controller 9 at a predetermined rate to the minimum valve opening degree.

Abstract: An air conditioning apparatus comprising: a single heat source device including a compressor, a reversing valve, an outdoor heat exchanger and an accumulator; a plurality of indoor units including indoor heat exchangers and first flow controllers; a first main pipe and a second main pipe for connecting between the heat source device and the indoor units; a first branch joint which can selectively connect one end of the indoor heat exchanger of each indor unit to either one of the first main pipe and the second main pipe; a second branch joint which is connected to the other end of the indoor heat exchanger of each indoor unit through the first flow controllers, and which is also connected to the second main pipe through a second flow controller; the first branch joint and the second branch joint being connected together through the second flow controller; the second branch joint being connected to the first main pipe through a fourth flow controller; a junction device which includes the first branch joint, th

Abstract: An air conditioning system for multiple rooms, comprising:an outdoor unit including a variable delivery compressor, a four way reversing valve and an outdoor heat exchange unit;two main connecting pipes composed of a high pressure main pipe and a low pressure main pipe to connect between outdoors and indoors;a distribution controller which is connected to the main connecting pipes to divide them into a high pressure pipe, a low pressure pipe and a medium pressure pipe therein;a plurality of indoor units which include indoor heat exchangers, respectively, which are one end connected to the medium pressure pipe through electronic expansion valves, respectively, and which are the other end selectively connected to either one of the high pressure pipe and the low pressure pipe, respectively;detecting means for detecting either one of refrigerant temperatures and refrigerant pressures; andcontrol means for carrying out a predetermimed control based on such detection.

Abstract: An air conditioning apparatus comprises a single heat source device including a compressor, a reversing valve, an outdoor heat exchanger and an accumulator; a plurality of indoor units including indoor heat exchangers and first flow controllers; a first main pipe and a second main pipe for connecting between the heat source device and the indoor units, the first main pipe having a greater diameter than the second main pipe, a first branch joint which can selectively connect one end of the indoor heat exchanger of each indoor unit to either one of the first main pipe and the second main pipe; a second branch joint which is connected to the other end of the indoor heat exchanger of each indoor unit through the first flow controllers, and which is also connected to the second main pipe through a second flow controller; the first branch joint and the second branch joint being connected together through the second flow controller; a junction device which includes the first branch joint, the second flow controller