Refrigeration apparatus

A refrigeration apparatus including

• a refrigerant circuit that includes a compressor, a heat-source-side heat exchanger, and a plurality of utilization-side units each including an utilization-side heat exchanger and an expansion valve and arranged in parallel, the refrigerant circuit being configured to perform a refrigeration cycle where a high pressure is equal to or greater than a critical pressure of a refrigerant,
• each of the plurality of utilization-side units being configured to perform an operation in which the utilization-side heat exchanger functions as a radiator, and an operation in which the utilization-side heat exchanger functions as an evaporator,
• the refrigeration apparatus being configured to perform at least a heat application operation in which all of the utilization-side heat exchangers function as a radiator, wherein
• the plurality of utilization-side units are capable of separately setting respective set temperatures,
• the refrigeration apparatus further comprises a controller configured to set a reference temperature higher than the highest set temperature among the set temperatures for the plurality of utilization-side units, and separately control an opening degree of the expansion valve of each of the plurality of utilization-side units so that a temperature of the refrigerant at an outlet of the utilization-side heat exchanger of each of the plurality of utilization-side units reaches the reference temperature, in the heat application operation, and
• control of the opening degrees of the expansion valves of the plurality of utilization-side units on a basis of the set reference temperature reduces a difference among amounts of refrigerant accumulated in the plurality of utilization-side heat exchangers of the respective plurality of utilization-side units.