Abstract: An air-conditioning system includes: a compressor unit including a housing accommodating a refrigerant compressor; a high-pressure gas refrigerant pipe connected to a discharge side of the refrigerant compressor; a low-pressure gas refrigerant pipe connected to a suction side of the refrigerant compressor; and air-conditioners. The air-conditioners each include: a return-air inlet and a supply-air outlet each communicating with a predetermined space that is to be air-conditioned; a first heat exchanger configured to cause heat-exchange between refrigerant flowing in the first heat exchanger and air passing through the first heat exchanger; an exhaust-air outlet and an outside-air inlet each communicating with an outside of the predetermined space; and a second heat exchanger configured to cause heat-exchange between refrigerant flowing in the second heat exchanger and air passing through the second heat exchanger.

Abstract: A refrigerant circuit for a refrigeration apparatus with a thermal storage, which is using CO2 as refrigerant, includes: at least one compressor, a heat-source-side heat exchanger, an expansion device, and a thermal storage, including a thermal storage material, which is preferably a phase changing material from the group: organic PCMs like bio-based, paraffin, carbohydrate or lipid derived, or water. The refrigerant circuit further includes: a first fluid communication pipe communicating between a fluid side of the heat-source-side heat exchanger and one side of the thermal storage, and a second fluid communication pipe communicating between the expansion device and the other side of the thermal storage.

Abstract: An air-conditioner includes: a return-air inlet and a supply-air outlet each communicating with a predetermined space; a first main air channel configured to allow air to flow therein towards the supply-air outlet; a first heat exchanger disposed in the first main air channel and that causes heat-exchange between refrigerant flowing therein and air passing therethrough; an exhaust-air outlet communicating with an outside of the predetermined space; a second main air channel configured to allow air to flow therein towards the exhaust-air outlet; a second heat exchanger disposed in the second main air channel and that causes heat-exchange between refrigerant flowing therein and air passing therethrough; and an exhaust ventilation channel configured to allow air to flow therein from the return-air inlet towards the exhaust-air outlet.