| 摘要 |
PURPOSE:To perform a fast repairing and maintenance work of an absorption freezer and avoid a stopped state of the absorption freezer by a method wherein the absorption freezer is provided with an abnormal state sensor for calculating a cold water load and a mean value of actual temperature differences of a condensor, comparing the mean value of the temperature differences with the cold water load and outputting an abnormal signal. CONSTITUTION:When an absorption freezer is being operated, an abnormal state sensor 42 inputs temperature signals from cold water sensors 36, 37, a condensing temperature sensor 38 and cooling water temperature sensors 40, 41, detects a load in reference to a temperature difference at cold water inlet port and cold water outlet port and an actual temperature difference under a 100% load and at the same time calculates an actual logarithmic mean temperature difference of the condensor 7. In the case that this logarithmic mean temperature difference exceeds an abnormal line of the logarithmic mean temperature difference of the load at that time, the abnormal state sensor 42 outputs an abnormal state signal and informs a user of an abnormal state of the condensor 7. Accordingly, even in the case that the absorption freezer is under a partial load in spring, etc., other than summer season, it may detect the abnormal state and perform a fast repairing and inspection work for abnormal state of the condensor 7. |
