Water heater and control
First Claim
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1. A water heater, comprising in combination:
- a tank for holding water having at least one water temperature;
a heater for heating the water;
first and second sensors, the first sensor detecting a first water temperature and responsively providing a first temperature signal, the second sensor detecting a second water temperature and responsively providing a second temperature signal; and
a controller having logic to regulate the heater based on a water draw time, wherein the first and second temperature signals are used to determine the water draw time and wherein the logic adjusts a first temperature differential based on the water draw time and a second differential temperature is adjusted based on the adjustment of the first temperature differential.
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Abstract
An improved heater and method of controlling the same is provided. The water heater has the combination of a tank for holding water, a heater for heating the water, a controller having logic to regulate the heater, and first and second sensors. Each of the sensors detects the water temperature at different areas within the water heater. The sensors also provide the controller with signals corresponding to the detected water temperature. In response to these signals, the controller regulates the heater when at least one of the signals of the first and second sensors satisfies at least one predetermined state condition.
80 Citations
25 Claims
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1. A water heater, comprising in combination:
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a tank for holding water having at least one water temperature; a heater for heating the water; first and second sensors, the first sensor detecting a first water temperature and responsively providing a first temperature signal, the second sensor detecting a second water temperature and responsively providing a second temperature signal; and a controller having logic to regulate the heater based on a water draw time, wherein the first and second temperature signals are used to determine the water draw time and wherein the logic adjusts a first temperature differential based on the water draw time and a second differential temperature is adjusted based on the adjustment of the first temperature differential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A water heater, comprising in combination:
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a tank for holding water having at least one water temperature; a heater for heating the water; first and second sensors, the first sensor detecting a first water temperature and responsively providing a first temperature signal, the second sensor detecting a second water temperature and responsively providing a second temperature signal; and a controller having logic to regulate the heater, wherein the logic adjusts a first temperature differential based on a water draw time and a second temperature differential based on the adjustment of the first temperature differential, wherein the logic disables a first heater-control zone based on an average water temperature, the water draw time, and a heat cycle time, and wherein the logic controls a second heater-control zone to have a double step down function.
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Specification