| 摘要 |
<P>PROBLEM TO BE SOLVED: To manufacture hot water at a high temperature close to a target temperature as far as possible, while saving energy. <P>SOLUTION: A waste heat utilizing system of a refrigerating device includes the refrigerating device, a water heater 3, a waste heat exchanger 5, and a circulating pump 53. The system heats circulating water with the waste heat exchanger by a high pressure gas refrigerant. In addition, the system includes a control device 20 for controlling the circulating pump on the basis of detected temperatures from a high pressure gas temperature sensor 15, an inlet water temperature sensor 17 to the waste heat exchanger, and an outlet water temperature sensor 18. The system includes comparing a high-pressure gas temperature of the high-pressure gas temperature sensor with an outlet water temperature of the outlet water temperature sensor, decreasing the number of revolutions of the circulating pump if it is larger than a first set temperature difference, comparing the high-pressure gas temperature with a second set temperature difference if it is the first set temperature difference or lower; maintaining the number of revolutions of the circulating pump if it is the second set temperature difference or higher, increasing the number of revolutions of the circulating pump if it is smaller than the second set temperature difference, and stopping the circulating pump when the inlet water temperature to the waste heat exchanger is a prescribed temperature or higher. <P>COPYRIGHT: (C)2012,JPO&INPIT |
