<；P>；PROBLEM TO BE SOLVED: To provide a hydraulic system and a food processing apparatus capable of decreasing energy consumption and reducing a load to an environment. <；P>；SOLUTION: This hydraulic system includes: a compressor 23 driven by a hydraulic actuator 24； a heat pump circuit 41 where a refrigerant compressed by the compressor 23 is circulated； an expansion valve 21 for reducing the pressure of the refrigerant circulated through the heat pump circuit 41； a high pressure side heat exchanger 22 for discharging the heat of the refrigerant flowing from the compressor 23 to the expansion valve 21； and a low pressure side heat exchanger 20 for applying heat to the refrigerant flowing from the expansion valve 21 to the compressor 23, wherein the low pressure side heat exchanger 20 includes a refrigerant circulating passage where the refrigerant flowing out of the expansion valve 21 in the heat pump circuit 41 is circulated, and a working water circulating passage where working water discharged from hydraulic actuators 12, 14, 24, 29 is circulated through a working water discharge circuit 52, and heat exchange is performed between the refrigerant flowing through the heat pump circuit 41 and the working water flowing through the working water discharge circuit 52. <；P>；COPYRIGHT: (C)2009,JPO&INPIT
