Pumpless top-up water heating tank
AssigneeMixergy Limited
InventorPeter ARMSTRONG
Life of this patent
Estimating the term…
Abstract
A water heating tank comprises a reservoir having a cold water inlet and a hot water outlet; a can disposed in a lower portion of the tank enclosing at least a part of a heater; a chimney extending from the top of the can to an upper portion of the tank. A chimney valve is arranged between the can and the chimney. The chimney valve is configured to prevent water flowing from the can into the chimney when a temperature of water in the can exceeds a first chimney threshold temperature.
Claims25
A water heating tank comprising:
- a reservoir having a cold water inlet and a hot water outlet;
- a can disposed in a lower portion of the tank enclosing at least a part of a heater;
- a chimney extending from the top of the can to an upper portion of the tank;
- and
- a chimney valve arranged between the can and the chimney, the chimney valve being configured to prevent water flowing from the can into the chimney when a temperature of water in the can exceeds a first chimney threshold temperature.
The water heating tank of any preceding claim, wherein the chimney valve comprises a wax motor.
The water heating tank of any preceding claim, wherein the chimney valve comprises:
- a flow stop;
- and
- a flow orifice configured to provide a fluid pathway from the can into the chimney,
- the flow stop being configured block the flow orifice when the temperature exceeds the first chimney threshold temperature thereby to prevent water flowing from the can into the chimney.
The water heating tank of any preceding claim, further comprising a can relief valve configured to control a flow of water from the can into the reservoir.
The water heating tank of any preceding claim, further comprising a throttle arranged between the can and the chimney.
A water heating tank comprising:
- a reservoir having cold water inlet and a hot water outlet;
- a can disposed in a lower portion of the tank enclosing at least a part of a heater;
- a chimney extending from the top of the can towards an upper portion of the tank;
- a throttle arranged between the can and the chimney for adjusting flow from the can into the chimney;
- a throttle control rod extending from the throttle to outside of the tank;
- and
- a throttle control rod actuator arranged outside the tank, the throttle control rod actuator being configured to move the throttle rod and thereby adjust a location and/or orientation of the throttle, preferably by manual operation of the throttle control rod actuator, thereby to allow a user to adjust a throttle setting.
A water heating tank comprising:
- a reservoir having a cold water inlet and a hot water outlet;
- a polymer can disposed in a lower portion of the tank enclosing at least a part of a heating element and optionally a polymer chimney extending from the top of the can to an upper portion of the tank;
- and
- a heating element controller configured to cut off power supplied to the heating element when a rate of increase in resistance in the heating element exceeds a threshold value.
Dependencies are inferred from the claim text.