Heat pump water heating system
US9897341B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Nov 23, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/486
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A controller of a heat pump water heating system drives circulation pumps, and uses a heat pump unit to increase a temperature of tank water within a hot water storage tank via a plate heat exchanger if the temperature of the tank water detected from a temperature sensor is lower than a heat source switch tank temperature, and the controller stops one of the circulation pump, drives other circulation pumps, and uses a boiler to increase the temperature of the tank water within the hot water storage tank via the plate heat exchanger in a shorter time than that of a case in which the heat pump unit is used to increase the temperature if the temperature of the tank water detected from the temperature sensor is equal to or higher than the heat source switch tank temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.