To implement heat energy storing operation of high efficiency, equalized in the time zone when night discount electric power can be utilized, while making the amount of remaining heat energy storage zero in switching from a stored heat energy utilizing operation to a heat energy storing operation.

This heat energy storage type refrigerating device comprises a refrigerating machine, a cold load, a heat energy storage unit and a control device 4, the control device 4 determines a stored heat energy utilizing operation time T by a stored heat energy utilizing time measuring means 42a, determines the difference ΔT between the determined stored heat energy utilizing operation time T and its target time T0by a stored heat energy utilizing operation target time setting means 42b, determines overs and shorts ΔQ of the stored heat energy on the basis of the determined difference ΔT by a shortage and overage heat quantity estimating means 43a, further determines an increment/decrement ΔG from the overs and shorts ΔQ, corrects the last refrigerant flow rate upper limit value Gmax by the decrement/increment ΔG to apply the same as a refrigerant flow rate upper limit value Gmax of the next heat storing operation to implement the optimum heat storing operation, and the heat storage operation is equalized in the time zone when the night discount power can be utilized.

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