Tankless water heater
US9664413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2015 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Oct 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/021
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A water heater with a housing having an internal chamber, an inlet port, and an outlet port; a heating element coupled to the housing; a water inlet line; a water outlet line; an inlet temperature sensor within the water inlet line; an outlet temperature sensor within the water outlet line; and a controller electrically connected to the inlet temperature sensor, the outlet temperature sensor, and the electrically power heating element. The controller is operable to detect a flow condition without using mechanical flow detection means and without supplying stand-by heating by adding an absolute value of the sensed change in temperature of water flowing upstream from the inlet port to the absolute value of the sensed change in temperature of the water flowing downstream from the outlet port to yield a sum and comparing the sum to a reference temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.