Refrigeration cycle device

Abstract

A refrigeration cycle device of an embodiment includes an outdoor unit, a plurality of indoor units, a first pipe, a second pipe, a third pipe, a switching unit, and a control unit. The outdoor unit includes a compressor and an outdoor heat exchanger. A plurality of indoor units each include an indoor expansion valve and an indoor heat exchanger. The third pipe allows the refrigerant flowing out of the indoor heat exchanger to flow into the compressor. The switching unit switches connections of the second pipe and the third pipe with respect to the indoor heat exchanger. The control unit sets an upper-limit opening degree of the indoor expansion valve when a predetermined condition is satisfied in a state in which the indoor heat exchanger is connected to the third pipe in the switching unit.

What is claimed is: 
     
         1 . A refrigeration cycle device comprising:
 an outdoor unit that includes a compressor and an outdoor heat exchanger;   a plurality of indoor units that each include an indoor expansion valve and an indoor heat exchanger;   a first pipe that allows a refrigerant to flow between the outdoor heat exchanger and the indoor heat exchanger;   a second pipe that allows the refrigerant discharged from the compressor to flow into the indoor heat exchanger;   a third pipe that allows the refrigerant flowing out of the indoor heat exchanger to flow into the compressor;   a switching unit that switches connections of the second pipe and the third pipe with respect to the indoor heat exchanger; and   a control unit that sets an upper-limit opening degree of the indoor expansion valve when a predetermined condition is satisfied in a state in which the indoor heat exchanger is connected to the third pipe in the switching unit.   
     
     
         2 . The refrigeration cycle device according to  claim 1 , wherein
 the upper-limit opening degree is a value corresponding to at least one of capacity information and configuration information of the indoor unit.   
     
     
         3 . The refrigeration cycle device according to  claim 1 , wherein
 the predetermined condition is a condition in which an instruction to set the upper-limit opening degree is input to the control unit.   
     
     
         4 . The refrigeration cycle device according to  claim 1 , wherein
 the predetermined condition is a condition in which a predetermined time has not elapsed after the indoor unit started a cooling operation.   
     
     
         5 . The refrigeration cycle device according to  claim 1 , further comprising a trunk pipe to which branch pipes corresponding to the plurality of indoor units and the third pipe are connected, wherein
 when the indoor unit corresponding to the branch pipe positioned farthest from the third pipe in an axial direction of the trunk pipe is defined as a first indoor unit,   the control unit sets the upper-limit opening degree of the indoor expansion valve of the first indoor unit when the predetermined condition is satisfied in a state in which the indoor heat exchanger of the first indoor unit is connected to the third pipe in the switching unit.