Next generation bare wire water heater
First Claim
Patent Images
1. A heating unit comprising:
- a tube havinga flange, andat least one indexed groove located along a length of the tube and forming a continuous recession within and across an outer surface circumference of the tube,wherein the at least one indexed groove contains a retention device; and
at least one electrical resistance heating element positioned outside the at least one indexed groove and having a first end connected to the tube via the flange and a second end connected to the tube via the retention device, the at least one electrical resistance heating element being adjustable to be arranged in first and second configurations, wherein,in the first configuration, the retention device is positioned in the indexed groove such that a longitudinal axis of the heating element is parallel to the tube, andin the second configuration, the retention device is positioned in the indexed groove such that the longitudinal axis of the heating element is not parallel to the tube.
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Accused Products
Abstract
A heating unit for heating fluid is described having at least one electrical resistance heating element on an outer surface of a tube. At least one indexed groove is provided around a surface of the tube allowing for at least one retention clip to hold the electrical resistance heating element. A heating chamber is also provided to enclose a portion of the tube and to provide a flow channel therebetween. The heating chamber includes an optical sensor to detect overheating of the at least one electrical resistance heating element. Fluid is heated by flowing over the surface of the at least one electrical resistance heating element and through the tube.
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Citations
23 Claims
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1. A heating unit comprising:
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a tube having a flange, and at least one indexed groove located along a length of the tube and forming a continuous recession within and across an outer surface circumference of the tube, wherein the at least one indexed groove contains a retention device; and at least one electrical resistance heating element positioned outside the at least one indexed groove and having a first end connected to the tube via the flange and a second end connected to the tube via the retention device, the at least one electrical resistance heating element being adjustable to be arranged in first and second configurations, wherein, in the first configuration, the retention device is positioned in the indexed groove such that a longitudinal axis of the heating element is parallel to the tube, and in the second configuration, the retention device is positioned in the indexed groove such that the longitudinal axis of the heating element is not parallel to the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 19, 20, 21, 22)
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8. A heating system comprising:
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a tube having a flange, and at least one indexed groove located along a length of the tube and forming a continuous recession within and across an outer surface circumference of the tube, wherein the at least one indexed groove contains a retention device; at least one electrical resistance heating element positioned outside the at least one indexed groove and having a first end connected to the tube via the flange and a second end connected to the tube via the retention device, the at least one electrical resistance heating element being adjustable to be arranged in first and second configurations; and a heating chamber that partially encloses the tube thereby creating a flow path therebetween, wherein, in the first configuration, the retention device is positioned in the indexed groove such that a longitudinal axis of the heating element is parallel to the tube, and in the second configuration, the retention device is positioned in the indexed groove such that the longitudinal axis of the heating element is not parallel to the tube. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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23. A heating unit comprising:
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a tube having a flange, and at least one indexed groove located along a length of the tube and forming a continuous recession within and across an outer surface circumference of the tube, wherein the at least one indexed groove contains a retention device; and at least one electrical resistance heating element positioned outside the at least one indexed groove and having a first end connected to the tube via the flange and a second end connected to the tube via the retention device, wherein the tube has a continuous outer surface circumference, the continuous recession extends across an entirety of the continuous outer surface circumference of the tube, an entirety of the at least one electrical resistance heating element is positioned outside the at least one indexed groove, the retention device is adjustably rotatable around the circumference of the tube within the indexed grooves to provide different locations on the circumference of the tube at which to connect the at least one resistance heating element, and the at least one electrical resistance heating element being linearly adjustable through the retention device so as to be at an angle with respect to a longitudinal axis of the tube.
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Specification