A regenerative air-conditioning apparatus including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a thermal energy storage unit, the regenerative air-conditioning apparatus comprising: a first valve device for switching a flow direction of refrigerant compressed in the compressor; a second valve device for switching a flow direction of refrigerant compressed in the compressor; a first branch part disposed on an outlet-side of the compressor, the first branch part dividing refrigerant compressed in the compressor to flow toward the first valve device, the second valve device, and the thermal energy storage unit; a first storage unit connection tube extending from the first branch part to the thermal energy storage unit; a first expansion device disposed in the first storage unit connection tube to selectively restrict a flow of refrigerant from the first branch part to the thermal energy storage unit; a condensed refrigerant tube extending from the outdoor heat exchanger to the indoor heat exchanger; and a second storage unit connection tube extending from the thermal energy storage unit to the condensed refrigerant tube, a low-pressure tube extending from the first storage unit connection tube to a suction-side of the compressor to allow evaporated refrigerant to flow therethrough; a flow rate adjustment valve disposed in the low-pressure tube to selectively restrict a flow of refrigerant in the low-pressure tube; a first connection tube extending from the first branch part towards the first valve device and configured to guide refrigerant compressed in the compressor into the first valve device; a second connection tube extending from the first valve device and configured to guide refrigerant introduced into the first valve device through the first connection tube into the outdoor heat exchanger; a third connection tube extending from the first valve device to the low-pressure tube; and a fourth connection tube extending from the first valve device and configured to guide refrigerant introduced into the first valve device into the indoor heat exchanger, a fifth connection tube extending from the second valve device and configured to guide refrigerant compressed in the compressor into the second valve device; a sixth connection tube extending from the second valve device and configured to guide refrigerant introduced into the second valve device through the fifth connection tube into the outdoor heat exchanger; a seventh connection tube extending from the second valve device to the low-pressure tube; and an eighth connection tube extending from the second valve device and configured to guide refrigerant introduced into the second valve device into the indoor heat exchanger. a first valve device for switching a flow direction of refrigerant compressed in the compressor; a second valve device for switching a flow direction of refrigerant compressed in the compressor; a first branch part disposed on an outlet-side of the compressor, the first branch part dividing refrigerant compressed in the compressor to flow toward the first valve device, the second valve device, and the thermal energy storage unit; a first storage unit connection tube extending from the first branch part to the thermal energy storage unit; a first expansion device disposed in the first storage unit connection tube to selectively restrict a flow of refrigerant from the first branch part to the thermal energy storage unit; a condensed refrigerant tube extending from the outdoor heat exchanger to the indoor heat exchanger; and a second storage unit connection tube extending from the thermal energy storage unit to the condensed refrigerant tube, a low-pressure tube extending from the first storage unit connection tube to a suction-side of the compressor to allow evaporated refrigerant to flow therethrough; a flow rate adjustment valve disposed in the low-pressure tube to selectively restrict a flow of refrigerant in the low-pressure tube; a first connection tube extending from the first branch part towards the first valve device and configured to guide refrigerant compressed in the compressor into the first valve device; a second connection tube extending from the first valve device and configured to guide refrigerant introduced into the first valve device through the first connection tube into the outdoor heat exchanger; a third connection tube extending from the first valve device to the low-pressure tube; and a fourth connection tube extending from the first valve device and configured to guide refrigerant introduced into the first valve device into the indoor heat exchanger, a fifth connection tube extending from the second valve device and configured to guide refrigerant compressed in the compressor into the second valve device; a sixth connection tube extending from the second valve device and configured to guide refrigerant introduced into the second valve device through the fifth connection tube into the outdoor heat exchanger; a seventh connection tube extending from the second valve device to the low-pressure tube; and an eighth connection tube extending from the second valve device and configured to guide refrigerant introduced into the second valve device into the indoor heat exchanger.