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US 2014/0150769 A1Published application
Heat Exchanger for Oven
AssigneeAlto-Shaam, Inc.
InventorsJ. K. Raghavan, Jan Bartelick
Life of this patent
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Abstract
An oven includes a heat exchanger with flattened segments providing low thermal resistance between flue gases being conveyed through the heat exchanger and a peripheral wall of the heat exchanger to increase the efficiency of heating of the peripheral wall of the heat exchanger to facilitate increasing a temperature of heated air that is delivered by a fan, across an outer surface of the peripheral wall of the heat exchanger, and through a cooking volume of the oven.
Claims17
An oven comprising:
- an oven housing defining a cooking volume;
- a fan communicating with the cooking volume for directing heated air through the cooking volume;
- a heat exchanger providing at least one tube extending around the fan for heating the heated air being directed by the fan through the cooking volume, the heat exchanger tube including:
- a first tube segment having a first passage extending longitudinally along an axis therethrough and having a width that is defined transversely across and through a middle portion of the first passage, and
- a second tube segment connected to the first tube segment and having a second passage communicating with the first passage and extending longitudinally along the axis through the second tube segment and having a width that is defined transversely across and through a middle portion of the second passage, wherein the width of the second tube segment is smaller than the minimum width of the first tube segment;
- wherein the first and second tube segments have substantially the same surface area per unit distance along the axis.
3 more elements
Dependencies are inferred from the claim text.