AIR CONDITIONING DEVICE

摘要

An air conditioning device which can continuously supply as efficient as possible a required amount of heat for a long period of time to an indoor unit requiring an amount of heat. An air conditioning device provided with: a heat medium-side device which forms a heat medium circulation circuit by connecting the following elements together by means of piping: pumps (21) which circulate a heat medium in each system, the heat media engaging in the heating or cooling of intermediate heat exchangers (15) for heating or cooling heat media which are circulated; utilization heat exchangers (26) which perform heat exchange between the heat media and air which is subjected to the heat exchange; and flow path switching valves (22, 23) which switch between flow paths in order to supply to each utilization heat exchanger (26) a heat medium relating to a selected system among the heat media circulating in the systems. The air conditioning device is also provided with a relay unit-side control device (300) which, upon determining that the heating or cooling of the heat media by the intermediate heat exchangers (15) cannot be performed, performs switching control of the flow path switching valves (22, 23) in order to circulate the heat medium between a utilization heat exchanger (26) which causes the heat medium to absorb heat and a utilization heat exchanger (26) which causes the heat medium to release heat, and the utilization heat exchangers (26) are determined preferentially.