Hot water storage-type hot water supply system and method for operating same

Abstract

Disclosed is a hot water storage-type hot water supply system having a battery unit, a heat pump cycle, a water storage tank, a water circulation path, a first path, a second path, a first temperature detection unit, a second temperature detection unit, and a control unit. The heat pump cycle circulates a first refrigerant. The first path and the second path circulate a second refrigerant. The first temperature detection unit detects the temperature of the battery unit. The second temperature detection unit detects the temperature of water stored in the water storage tank. The control unit causes the second refrigerant to pass through the first path when the temperature of the battery unit, detected by the first temperature detection unit is higher than a first predetermined temperature. The control unit causes the second refrigerant to pass through the second path when the temperature of the battery unit, detected by the first temperature detection unit is lower than a second predetermined temperature. The control unit closes the first path and the second path when the temperature of the battery unit, detected by the first temperature detection unit is the second predetermined temperature or more and the first predetermined temperature or less.

Description

technical field [0001] The present invention relates to a hot water storage type hot water supply system and an operating method thereof, and in particular to control for improving the charging and discharging efficiency of an electric storage unit and the efficiency of a combined system. Background technique [0002] Conventionally, many systems utilizing a heat pump cycle and a secondary battery for charging and discharging system power have been announced. Here, it is known that the charge and discharge characteristics of a secondary battery are generally largely influenced by the temperature of the secondary battery itself. Then, in order to adjust the secondary battery to an appropriate temperature, a system using heat generated by a heat pump is disclosed (for example, Patent Document 1). [0003] In addition, a structure is disclosed in which, in a system having a heat pump cycle with a water storage tank and a secondary battery, when the temperature of the secondary...

AI Technical Summary

Problems solved by technology

However, in the above structure, although the charging and discharging efficiency of the secondary battery is improved, the efficiency of the heat pump side is lowered accordingly.

[0005] Also, in the structure described in Patent Document 2, although the efficiency of the secondary battery is improved, the efficiency of the heat pump side is lowered.

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