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US 10,888,197 B2Granted
Gas heat exchanger with baffle for deep fat fryer
AssigneeAlto-Shaam, Inc.
InventorsJeremy J. Buford, Jon Paul Flick, George McMahon, Joshua James Shimel, Thomas C. Stollenwerk
Life of this patent
Estimating the term…
Abstract
The present invention provides a deep fat fryer providing an oil vat for holding hot oil. The hot oil of the vat is heated by a heat exchanger system that includes a pair of heat tubes. Heat transfer along a length of the heat tubes is facilitated by a heat conductive baffle substantially filling the interior of the heat tubes in volume and length. Heated air and gas are forced through the dense and elongated baffle to facilitate heat transfer to the walls of the heat tubes.
Claims17
A food fryer comprising:
- a fryer tank adapted to hold a volume of cooking fat for cooking therein;
- at least one heat tube passing through the volume to be surrounded by the cooking fat;
- a blower adapted to receive air and gas and deliver mixed air and gas downstream to the at least one heat tube;
- a gas burner producing a flame to heat the mixed air and gas;
- and
- an internal baffle positioned within the at least one heat tube to conduct heat from heated air and gas passing through the heat tube to walls of the heat tube and extending from an inlet to an outlet of the heat tube along a longitudinal axis extending along a length of the heat tube;
- wherein the internal baffle is formed by a curved plate winding about a baffle axis to form a helicoid wherein the curved plate carries a plurality of holes distributed along a length of the internal baffle and at more than one distance from the baffle axis of the internal baffle;
- wherein the internal baffle provides a helical channel conducting the heated air and gas in a helical path winding about the baffle axis of the internal baffle as it moves along the longitudinal axis from the inlet to the outlet of the heat tube.
5 more elements
A deep fat fryer comprising:
- a housing providing a heater cavity separated from an adjacent fryer cavity by a common wall wherein the fryer cavity provides a vat holding a volume of frying fat for cooking having a floor opposite an upper opening where the frying fat may be accessible to a user;
- a blower held within the heater cavity and configured to receive air and gas and deliver mixed air and gas downstream;
- a gas burner producing a flame to heat the mixed air and gas;
- a heat tube communicating with the blower and extending into the fryer cavity and spaced from the floor of the fryer cavity to be surrounded by frying fat and providing a cylindrical tubing having an outer surface exposed to the frying fat opposite an inner surface defining an internal passage supporting a flow of the heated gas therethrough the passage;
- and
- an impingement baffle positioned within the heat tube to receive the heated gas and conduct heat from the heated gas to walls of the heat tube and extending from an inlet to an outlet of the heat tube along a longitudinal axis extending along a length of the heat tube,
- wherein the impingement baffle is formed by a curved plate winding about a baffle axis to form a helicoid wherein the curved plate carries a plurality of holes distributed along a length of the internal baffle and at more than one distance from the baffle axis;
- wherein the impingement baffle is thermally conductive and in contact with an inner surface of the heat tube to conduct heat thereto
- wherein the impingement baffle provides a helical channel conducting the heated air and gas in a helical path winding about the baffle axis as it moves from the inlet to the outlet.
6 more elements
A cooking appliance comprising:
- a tank adapted to hold a volume of fluid for cooking therein;
- at least one heat tube passing through the volume to be surrounded by the fluid;
- a blower adapted to receive air and gas and deliver mixed air and gas downstream to the at least one heat tube;
- a gas burner producing a flame to heat the mixed air and gas;
- and
- an internal baffle positioned within the at least one heat tube to conduct heat from heated air and gas passing through the heat tube to walls of the heat tube and extending from an inlet to an outlet of the heat tube along a longitudinal axis extending along a length of the heat tube;
- wherein the internal baffle is formed by a curved plate winding about a baffle axis to form a helicoid wherein the curved plate carries a plurality of holes distributed along a length of the internal baffle and at more than one distance from the baffle axis of the internal baffle;
- wherein the internal baffle provides a helical channel conducting the heated air and gas in a helical path winding about the baffle axis of the internal baffle as it moves from the inlet to the outlet.
5 more elements
Dependencies are inferred from the claim text.