Abstract: In a refrigerant circuit of an air conditioning device 10, an upper heat source side heat exchanger 2a having a large heat load and a lower heat source side heat exchanger 2b having a small heat load are connected in parallel between an expansion device 15 and a suction side of a compressor 4. Additionally, the refrigerant circuit of the air conditioning device 10 is provided with a branch circuit 9 configured to distribute refrigerant to each of the upper heat source side heat exchanger 2a and the lower heat source side heat exchanger 2b, and the branch circuit 9 is configured to supply the upper heat source side heat exchanger 2a with refrigerant of lower quality than that of the refrigerant supplied to the lower heat source side heat exchanger 2b.

Abstract: To obtain a communication driver performing data conversion between a equipment and a management unit even when different data formats are used in a manufacturing system, in which the equipment that is equipped with a device for controlling a machine based on an instruction from the management unit and the management unit having a management application program that manages the equipment are connected to the machine, the communication driver includes device drivers (51a, 51b) provided for each type of devices (22a, 22b) in the manufacturing system and controlling communications with the devices (22a, 22b), and equipment drivers (52A, 52B) provided for each type of machines (21A, 21B) in the manufacturing system and accessing the machines (21A, 21B) to be accessed by using the device drivers (51a, 51b) in accordance with an instruction from the management application program (31). The device drivers (51a, 51b) and the equipment drivers (52A, 52B) are hierarchized.