Hydronic heating water temperature control valve
OwnerJoachim Fiedrichinventor
Life of this patent
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Abstract
In a three-way, variable position, automatically controlled diverting valve that is provided in the return line to the boiler of a hydronic heating system between the heating loop return and the boiler return, the valve having its input from the heating loop return, its through output to the boiler return and its diverted output to the heating loop supply, so that the valve diverts some of the cooler return water to the boiler hot supply water, diluting the supply water to reduce the temperature of supply water that feeds the heating loop, a method and means of adapting the diverting valve so that the valve cannot be positioned so that the diverted water flow therefrom is closed, including a stop plug inserted into a housing of the valve that reduces the range of said variable positioning.
Claims14
In a hydronic heating system having a source of hot supply water and a reservoir of cooler return water, a supply water line from said source, a return water line to said reservoir and one or more heating loops through which water flows from said supply line to said return line, a three way diverting valve in said return line for diverting water from said return line to said supply line so that said supply water to said heating loop is diluted with said diverted return water, reducing the temperature thereof, said valve having a stem that positions said valve and a spring that urges said stem toward the valve position of less diverted water flow and a valve controller for controlling the position of said valve stem, said valve stem and spring being contained in a housing from which said valve stem projects to said valve controller through an opening in said housing, the improvement comprising:
- (a) means for limiting the movement of said valve stem in said direction toward the valve position of less diverted water flow including,
- (b) a stop plug that fits into said opening in said housing providing a mechanical block that limits the movement of said valve stem in said direction toward the valve position of less diverted water flow,
- (c) whereby said valve stem cannot be positioned for no diverted water flow.
In a hydronic heating system having a source of hot supply water and a reservoir of cooler return water, a supply water line from said source, a return water line to said reservoir and one or more heating loops through which water flows from said supply line to said return line, a three way diverting valve in said return line for diverting water from said return line to said supply line so that said supply water to said heating loop is diluted with said diverted return water, reducing the temperature thereof, said valve having a stem that positions said valve and a spring that urges said stem toward the valve position of less diverted water flow, a valve controller for controlling the position of said valve stem, said valve stem and spring being contained in a housing from which said valve stem projects to said valve controller through an opening in said housing, in which there is a plug providing a mechanical block that limits the movement of said valve stem, the method of assuring that the temperature of said diluted water is always less than the temperature of said supply water including the step of:
- (a) adjusting the position of said plug in said housing opening to limit the movement of said valve stem in said direction toward the valve position of less diverted water flow,
- (b) whereby said valve stem cannot be positioned for no diverted water flow.
Dependencies are inferred from the claim text.