| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid cooling device that can accurately grasp the amount of liquid in a hydraulic fluid storage tank at a low cost irrespective of the installation attitude of a housing and can perform quick detection in case of leakage of the liquid.SOLUTION: In a projection display device including a heating member, a liquid cooling system for cooling the heating member, and a storage tank that is a part of the liquid cooling system and stores a hydraulic fluid, the projection display device has a residual amount meter that measures the residual amount of the hydraulic fluid in the storage tank; the storage tank is rotatable with respect to a projection display device body; the storage tank has an exhaust port and an inflow port that are arranged in different areas with the rotational axis as the boundary when viewed from the direction of the rotational axis of the storage tank.SELECTED DRAWING: Figure 1 |
