| 主权项 |
1. A multi air-conditioning apparatus, comprising:
at least one heat source unit including a compressor and a heat source side heat exchanger; a plurality of use units each including a use side heat exchanger, and use unit refrigerant temperature detection devices each configured to detect a use unit refrigerant temperature that is a temperature of a refrigerant in the use side heat exchanger; a pipe branch unit connecting one of the at least one heat source unit to the plurality of use units by refrigerant pipes, the pipe branch unit including
a plurality of branch ports that divide a passage leading from the at least one heat source unit, the plurality of branch ports being connected to the plurality of use units, anda plurality of flow control valves respectively connected to each of the plurality of branch ports, the plurality of flow control valves configured to control a direction of distribution or a flow rate of the refrigerant flowing in each of the plurality of use units; a refrigerant saturation temperature detection device configured to detect a refrigerant saturation temperature of the at least one heat source unit or the plurality of use units; and a unit controller connected to the at least one heat source unit and the plurality of use units, the unit controller including
a storage unit that stores capacity information of each of the plurality of use units and that stores information of a set branch port that indicates a correspondence of each branch port connected to the corresponding one of the plurality of use units,a control unit that performs a correspondence determination operation, the correspondence determination operation operating at least one of the plurality of flow control valves and differentiating the direction of distribution or the flow rate of the refrigerant flowing from at least one of the plurality of use units to remaining ones of the plurality of use units, anda determination unit that determines, based on the use unit refrigerant temperatures during performance of the correspondence determination operation, a location of a non-correspondence between each of the plurality of branch ports that is connected to the corresponding one of the plurality of use units and the set branch port, wherein the control unit identifies the at least one of the plurality of flow control valves, operated in the correspondence determination operation, based on the capacity information of each of the plurality of use units, the refrigerant saturation temperature, and a use unit air temperature that is the temperature of the air that exchanges heat with the use side heat exchanger. |
