| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot water reservoir, which facilitates the control of an inner ladder without losing the inner ladder, and a heat pump device. SOLUTION: An outer ladder 71 and the inner ladder 81 are arranged in a lump at the outer wall T of the hot water reservoir 50, and the user goes up to the roof of the hot water reservoir 50, using the outer ladder 71, and then removes the inner ladder 81, and inserts this inner ladder 81 into an inspection port 67 provided at the roof of the hot water reservoir 50, and can enter the inside of the hot water reservoir 50. |
