| 摘要 |
PROBLEM TO BE SOLVED: To obtain an ice heat storage system adaptable to environmental improvement of convenience store, or the like, by conducting air conditioning in correspondence with an air conditioning load while accumulating heat when an air conditioning load, e.g. cooling or heating, is required in night time. SOLUTION: In ice heat storage system comprising a circulation circuit formed by coupling a heat source machine (heat pump) D and a heat storage water tank 20 through refrigerant piping, the heat storage water tank 20 is coupled to the air conditioning load C side through a lower water supply pipe 15 and an upper return pipe 15'. The lower water supply pipe 15 is provided with a three-way mixing valve 16 and a circulation pump 17 and the upper return pipe 15' is provided with a follow-up heat exchanger 13 and piping for branching a part of water delivered from the heat exchanger 13 to the three-way mixing valve 16. Piping for circulating a part of refrigerant to the follow-up heat exchanger 13 is branched from the way of refrigerant piping (a) on the low pressure side of the ice heat storage system and refrigeration flow regulation valves 12B, 12A are provided, respectively, for the refrigerant branch piping and the branched refrigerant piping of the ice heat storage system.
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