Title:
STORAGE-TYPE WATER HEATER
Document Type and Number:
WIPO Patent Application WO/2019/186683
Kind Code:
A1
Abstract:
Provided is a storage-type water heater with which heat inside a heat source device can be recovered efficiently. This storage-type water heater comprises: a hot water storage tank for storing hot water; a heat source device equipped with a heat pump cycle wherein a water-refrigerant heat exchanger, a compressor, an air heat exchanger, and an expansion valve are connected in a refrigerant circuit; a water circuit connecting an upper part and a lower part of the hot water storage tank and the heat source device; a bypass circuit branching from partway along the water circuit and connecting the heat source device to the lower part of the hot water storage tank; a circulation pump for circulating hot water in the water circuit; and a control unit for carrying out a heat recovery operation wherein, after a boiling operation wherein hot water heated by the heat source device is stored in the hot water storage tank is completed and the compressor is stopped, driving of a heat source pump is continued and heat inside the heat source device is returned to the lower part of the hot water storage tank through the bypass circuit, and a secondary heat recovery operation wherein, when the heat recovery operation has been completed and a preset start condition has been satisfied, the heat inside the heat source device is returned to the lower part of the hot water storage tank through the bypass circuit.
Inventors:
SHIBAZAKI NAOKI (JP)
Application Number:
PCT/JP2018/012347
Publication Date:
October 03, 2019
Filing Date:
March 27, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F24H4/02; F24H1/18
Foreign References:
| JP2010266135A | 2010-11-25 | |||
| JP2015190631A | 2015-11-02 |
Attorney, Agent or Firm:
TAKADA, Mamoru et al. (JP)
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