Multi-type refrigeration cycle apparatus

A multi-type refrigeration cycle apparatus comprising:

• a refrigerant circuit in which a compressor, a heat-source-side heat exchanger, a plurality of expansion valves, and a plurality of use-side heat exchangers connected in series to the respective expansion valves are connected by pipes, and refrigerant is circulated;
• and
• a controller configured to control components in the apparatus,
• wherein the controller includes
• a first controller configured to calculate a total expansion-valve opening degree for the expansion valves as a value for causing a heat-source-side state value of the refrigerant flowing out of the heat-source-side heat exchanger to follow a target heat-source-side state value, and output the total expansion-valve opening degree as a total heat-source-side expansion-valve opening degree,
• a second controller configured to calculate the total expansion-valve opening degree for the expansion valves as a value for causing a use-side state value of the refrigerant flowing out of each of the plurality of use-side heat exchangers to follow a target use-side state value, and output the total expansion-valve opening degree as a total use-side expansion-valve opening degree,
• a maximum selector configured to select one of the total heat-source-side expansion-valve opening degree and the total use-side expansion-valve opening degree, as a maximum total expansion-valve opening degree, and
• a distribution controller configured to perform processing to distribute the maximum total expansion-valve opening degree among the expansion valves as respective opening degrees thereof, and
• wherein the distribution controller is configured to distribute the maximum total expansion-valve opening degree at distribution ratios in which the opening degrees of the expansion valves associated with the respective use-side heat exchangers are relatively changed, based on comparison between the use-side state values of the refrigerant flowing out of the use-side heat exchangers and a set threshold.