| 摘要 |
PURPOSE:To make it possible to conduct an efficient operational control by converting an output signal of a load cell into an ice forming quantity to compute a latent heat storage quantity, and computing the ice coating quantity of a latent heat storage quantity from a detection signal of water temperature detection means thereby to continuously detect the total heat storage quantity of heat storage tank. CONSTITUTION:A load cell 9 provided at an ice making heat exchanger 2b within a heat storage tank 2 measures a buoyancy accompanied by the ice forming using as a reference value O a state where ice is not coated on the outer periphery of a cooling pipe of an ice making heat exchanger 2b, and an output signal of said load cell 9 is inputted to a microcomputer 11. The quantity of ice being coated is converted from the buoyancy at the computing part of the computer 11 to compute the latent heat storage quantity. Further, the detection signal of a temperature detecting end 10a of a water temperature sensor 10 is inputted to the microcomputer 11 to compute the sensible heat storage quantity of water 7 within the heat storage tank 2. The latent heat storage quantity and the sensible heat storage quantity are totalled, and the total storage heat quantity in the heat storage tank 2 is detected. The value of thus obtained heat storage quantity is outputted as a current signal, and is sent to the control system of the heat source device, and thus the ice storage operation and the space heating operation are carried out efficiently.
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