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Patent Searching and Data


Title:
HEAT PUMP TYPE WATER HEATER
Document Type and Number:
Japanese Patent JP2021143772
Kind Code:
A
Abstract:
To propose a heat pump type water heater capable of suppressing lowering in the amount of hot water in a hot water storage tank.SOLUTION: A heat pump type water heater includes: a hot water storage tank (20); a heat pump unit (100); a circulation pump (P) for circulating hot water in the hot water storage tank (20) via a water heat exchanger (2); and a control device (10) for controlling the heat pump unit (100) and the circulation pump (P). In the case where, during a second boiling operation in which the hot water circulated by the circulation pump (P) is heated by the water heat exchanger (2) and the hot water in the hot water storage tank (20) is boiled, the hot water stored in the hot water storage tank (20) is tapped, or in the case where hot water tapping of the hot water stored in the hot water storage tank (20) is predicted, the operation is switched to a first boiling operation in which the rotational frequency of the circulation pump (P) is lower than that during the second boiling operation.SELECTED DRAWING: Figure 1

Inventors:
MATSUZAKA YUKIO
YOSHIKAWA SHINJI
Application Number:
JP2020040828A
Publication Date:
September 24, 2021
Filing Date:
March 10, 2020
Export Citation:
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Assignee:
DAIKIN IND LTD
International Classes:
F24H4/02; F24D17/02
Attorney, Agent or Firm:
Takuji Yamada
Etsuko Isoe
Toshiyuki Yamazaki