| 摘要 |
PROBLEM TO BE SOLVED: To improve cooling performance of a cooler for simultaneously cooling a low electric heating element and a high electric heating element.SOLUTION: A first cooling pipe 126 is disposed at the rearmost stage of a cooling pipe group 121 and a first heating element 141 being a low electric heating element is held between the first cooling pipe 126 and a second cooling pipe 127 located side by side with the first cooling pipe 126. A second electric heating element 142 being a high electric heating element is held between the second cooling pipe 127 and a cooling pipe stacked more on a front stage side from the second cooling pipe 127. Further, coupling pipes 36, 38 are interposed between the first cooling pipe 126 and the second cooling pipe 127. Thereby, a cooling medium flow rate in the first cooling pipe 126 for cooling only the first electric heating element 141 decreases, and on the other hand, cooling medium flow rates in the second cooling pipe 127 for cooling the second electrical heating element 142 and in the cooling pipe more on the front stage side from the second cooling pipe 127 increase, due to circulation resistance of a cooling medium flowing in the coupling pipes 36, 38. As a result, cooling performance of a cooler 10 can be improved as a whole.SELECTED DRAWING: Figure 1 |
