STORAGE-TYPE WATER HEATER HAVING TANK CONDITION MONITORING FEATURES
First Claim
1. A storage-type water heater comprising:
- a water storage tank including a metal and a lining coupled to the metal;
a powered anode at least partially disposed in the water storage tank;
a controller configured tomeasure a first parameter having a relation to the operation of the powered anode;
adjust a current of the powered anode based on the first parameter;
measure a second parameter having a relation to the operation of the powered anode; and
generate a signal when the second parameter exceeds a threshold.
2 Assignments
0 Petitions
Accused Products
Abstract
Methods and systems for evaluating the condition of a water tank having a powered anode protection system. The water heater includes a storage tank to hold water, a powered anode, and a control circuit. The control circuit includes a variable voltage supply, a voltage sensor, and a current sensor. The control circuit is configured to compare a measured parameter to a threshold. In some constructions, the threshold is indicative of a condition of the storage tank at which the powered anode is no longer able to protect the storage tank from corrosion. In other constructions, the threshold is predicative of a potential failure of the storage tank caused by corrosion. In some constructions, the control circuit is configured to estimate a time remaining until the predicted failure of the storage tank.
-
Citations
34 Claims
-
1. A storage-type water heater comprising:
-
a water storage tank including a metal and a lining coupled to the metal; a powered anode at least partially disposed in the water storage tank; a controller configured to measure a first parameter having a relation to the operation of the powered anode; adjust a current of the powered anode based on the first parameter; measure a second parameter having a relation to the operation of the powered anode; and generate a signal when the second parameter exceeds a threshold. - 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, 25, 26)
-
-
27. A storage-type water heater comprising:
-
a water storage tank configured to hold water, the water storage tank including a metal and a lining coupled to the metal; a powered anode at least partially disposed in the water storage tank; a controller configured to determine a threshold predicative of a failure of the water storage tank, the threshold being based upon a characteristic of the water storage tank and a characteristic of the water held in the water storage tank, measure a current of the powered anode, the measured current being indicative of a degree of exposure of the metal of the water storage tank, determine an estimated time remaining until a failure of the water storage tank, display the estimated time remaining to a user, and generate a signal when the measured current applied to the powered anode exceeds the threshold. - View Dependent Claims (28, 29, 30, 31, 32)
-
-
33. A method of predicting a failure of a water storage tank in a storage-type water heater, the storage-type water heater including
the water storage tank configured to hold water, the water storage tank including a metal and an internal lining coupled to the metal, and a powered anode at least partially disposed in the water storage tank, the method comprising: -
determining a threshold predicative of a failure of the water storage tank, the threshold being based upon a characteristic of the water storage tank and a characteristic of the water held in the water storage tank; measuring an electric potential of the powered anode relative to the metal of the water storage tank; adjusting a current of the powered anode to have the measured electric potential emulate a target electric potential; measuring the current of the powered anode; and generating a signal when the measured current exceeds the threshold. - View Dependent Claims (34)
-
Specification