Demand side management of water heater systems
First Claim
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1. A home water heater system, comprising:
- a water heater having a thermostat connected to a heating element, where the water heater is connected to a cold in pipe and a hot out pipe;
a mixer valve coupled between the cold in pipe and the hot out pipe;
a controller coupled to the thermostat, where the controller is configure to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy;
a thermoelectric device configured to determine water temperature and positioned in communication with the hot out pipe and the controller;
wherein the thermoelectric device is a temperature sensor that further is configured to determine water purity.
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Abstract
The invention provides a water heater system having a water heater, a mixer valve, and a controller. The water heater includes a thermostat connected to a heating element. The water heater is connected to a cold in pipe and a hot out pipe. The mixer valve is positioned between the cold in pipe and the hot out pipe and provided an output of mixed hot and cold water. The controller is coupled to the thermostat.
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Citations
23 Claims
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1. A home water heater system, comprising:
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a water heater having a thermostat connected to a heating element, where the water heater is connected to a cold in pipe and a hot out pipe;
a mixer valve coupled between the cold in pipe and the hot out pipe;
a controller coupled to the thermostat, where the controller is configure to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy;
a thermoelectric device configured to determine water temperature and positioned in communication with the hot out pipe and the controller;
wherein the thermoelectric device is a temperature sensor that further is configured to determine water purity.
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2. A home water heater system, comprising:
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a water heater having a thermostat connected to a heating element, where the water heater is connected to a cold in pipe and a hot out pipe;
a mixer valve coupled between the cold in pipe and the hot out pipe;
a controller coupled to the thermostat, where the controller is configure to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy;
a service pipe connected to an output of the mixing valve; and
a cutoff valve connected to the service pipe. - View Dependent Claims (3, 9)
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4. A home water heater system, comprising:
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a water heater having a thermostat connected to a heating element, where the water heater is connected to a cold in pipe and a hot out pipe;
a mixer valve coupled between the cold in pipe and the hot out pipe;
a controller coupled to the thermostat, where the controller is configured to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy; and
a thermoelectric device configured to determine water temperature and positioned in communication with the hot out pipe and the controller, where the controller includes a manual override switch to manually override the temperature signal from the thermoelectric device. - View Dependent Claims (5, 6, 8)
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7. The water heater system of claim 7, where the controller includes an automatic override switch to automatically override the temperature signal from the thermoelectric device, where the automatic override switch is connected in parallel with the manual override switch.
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10. A kit to retrofit a home water heater, the water heater having a thermostat and a heating element, where the water heater is connected to a cold in pipe and a hot out pipe, the kit comprising:
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a mixer valve configured to be coupled between the cold in pipe and the hot out pipe; and
a controller configured to be coupled to the thermostat, where the controller is configured to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A water heater system, comprising:
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a water heater having a thermostat connected to a heating element, where the water heater is connected to a cold in pipe and a hot out pipe;
a mixer valve coupled between the cold in pipe and the hot out pipe;
a controller coupled to the heating element, where the controller is configured to restrict a supply of energy to the heating element as a function of at least one of a time-varying cost for the energy and a public demand for the energy; and
a thermoelectric device configured to determine water temperature an positioned in thermal communication with water in the water heater and in signal communication with the controller, where the controller includes an override switch to override at leas a portion of the restriction of the supply of energy to the heating element in response to a signal received from said thermoelectric device. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification