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1. (WO2018186043) HOT-WATER SUPPLY DEVICE, AND DUAL HOT-WATER GENERATION UNIT

Pub. No.:    WO/2018/186043    International Application No.:    PCT/JP2018/006505
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Fri Feb 23 00:59:59 CET 2018
IPC: F25B 29/00
F24H 4/02
F25B 1/00
F25B 7/00
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: IITAKA Seishi
飯高 誠之
SHIGETA Akihiro
重田 明広
Title: HOT-WATER SUPPLY DEVICE, AND DUAL HOT-WATER GENERATION UNIT
Abstract:
To suppress destabilization of the degree of intake superheating of a hot-water supply compressor when, in an operation for simultaneously supplying hot water and heating, the amount of heat in an air-conditioning refrigerant supplied to a cascade heat exchanger increases and decreases in accompaniment with increases and decreases in the number of devices performing a heating operation in an indoor unit. A hot-water supply device (700) connected to an air conditioner (600), wherein: the hot-water supply device (700) comprises a hot-water generation unit (300) and a heat transfer unit (400) that is connected to the air conditioner (600); the hot-water generation unit (300) comprises, in a circular configuration, a compressor (310), a hot-water supply heat exchanger (320) for performing heat exchange between a hot-water supply refrigerant and a hot-water supply heat transfer medium, a flow rate control device (330) for controlling the flow rate of the hot-water supply refrigerant, and a cascade heat exchanger (340) for performing heat exchange between the hot-water supply refrigerant and an air-conditioning refrigerant; and the hot-water generation unit (300) furthermore comprises an internal heat exchanger (370) that uses a CO2 refrigerant as a hot-water supply refrigerant and is capable of performing heat exchange between high-pressure refrigerant at the outlet of the hot-water supply heat exchanger (320) and low-pressure refrigerant at the outlet of the cascade heat exchanger (340).