Gas heater for water and a gas water heater
AssigneeRheem Australia Pty Limited
InventorWilson Ng
Life of this patent
Estimating the term…
Abstract
The present invention provides a method of operating a gas heater for water including the steps of: restricting a water flow to the gas heater; determining a first rate of a first gas heating for the restricted water flow; adjusting the gas heating to the restricted water flow; repeating the previous steps until a heated water has a temperature above a temperature threshold; removing the restriction to the water flow to increase the water flow; and determining a second rate of a second gas heating for the increased water flow. The present invention also provides a gas water heater which utilises such a method.
Claims16
A water heating system comprising:
- a burner;
- a heat exchanger in communication with the burner and configured to receive heat therefrom;
- a water inlet configured to receive water and direct the water through the heat exchanger;
- a water outlet configured to receive the water from the heat exchanger and discharge the water;
- a primary water flow path extending between the water inlet and the water outlet;
- and
- a water flow restrictor system including:
- a constriction disposed in the primary water flow path, the constriction reducing a cross-sectional area of a portion of the primary water flow path;
- a by-pass water flow path that diverges from the primary water flow path at a location upstream from the constriction and rejoins the primary water flow path at a location downstream from the constriction and upstream from the heat exchanger;
- and
- a valve configured to selectively permit the water to flow through the by-pass water flow path;
- and
- a controller configured to perform a preheat operation comprising:
- receiving temperature data from one or more temperature sensors;
- and
- based on the temperature data, outputting instructions for the valve to close, thereby preventing water from flowing through the by-pass water flow path.
A water flow restrictor system for a water heating system, the water flow restrictor system comprising:
- a constriction disposed in a primary water flow path that is in fluid communication with a water inlet, a water outlet, and a heat exchanger of the water heating system, the constriction reducing a cross-sectional area of a portion of the primary water flow path;
- a by-pass water flow path that diverges from the primary water flow path at a location upstream from the constriction and rejoins the primary water flow path at a location downstream from the constriction and upstream from the heat exchanger;
- a valve configured to selectively permit the water to flow through the by-pass water flow path;
- and
- a controller configured to perform a preheat operation comprising:
- receiving temperature data from one or more temperature sensors;
- and
- based on the temperature data, outputting instructions for the valve to close, thereby preventing water from flowing through the by-pass water flow path.
Dependencies are inferred from the claim text.