A heat exchanger for a fryer system has at least one heat transfer conduit having heating fluid passing therethrough. A baffle plate is disposed in the heat transfer conduit, defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion. A plurality of tabs, each having a longitudinal axis, extend outwardly from the baffle plate. A crease is defined along the intersection of each tab and the plate. At least one tab is positioned in the first portion of the baffle plate and at least one tab is positioned in the second portion of the baffle plate. Webs separate adjacent tabs from one another in a direction substantially perpendicular to the longitudinal axis of the tabs. In certain embodiments, the crease of at least one tab forms an acute angle with a longitudinal edge of the baffle plate.
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0. 43. A heat tube baffle for a deep fat fryer wherein the fryer includes an oil tank for cooking food with at least one heat tube extending therethrough in heat exchange relationship with said tank wherein cooking oil in said tank is heated by said tube and wherein a burner generates products of combustion which flow through said tube from an entrance to an exit, said baffle comprising:
an elongated, rectangular metal plate having opposed faces, the plate disposed within the tube and extending within the tube, the plate having a plurality of mutually spaced tabs struck thereof, in mutually spaced rows and extending at an acute angle to the plate along the length thereof, each of the tabs in each row extending outwardly toward an adjacent tube wall and directed upstream of the flow, each struck tab leaving a corresponding hole in the plate whereby products of combustion in the flow are directed through the hole by the tab.
1. A heat exchanger for a deep fryer system, the heat exchanger being within a vat containing shortening, the heat exchanger comprising, in combination:
at least one heat transfer conduit having a heating fluid passing therethrough;
a baffle plate disposed within the at least one heat transfer conduit, defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of tabs, each tab comprised of a portion of the baffle plate which is cut from the baffle plate and bent away from one of the first and second surfaces, the tab leaving a hole in the baffle plate and having a longitudinal axis and extending outwardly away from one of the first and second surfaces of the baffle plate, an intersection of the tab and the baffle plate defining a crease, at least one a plurality of the tabs being positioned in the first portion of the baffle plate and at least one a plurality of the tabs being positioned in the second portion of the baffle plate, a plurality of the tabs extending outwardly from the first surface and a plurality of the tabs extending outwardly from the second surface; and
a plurality of webs, each web separating a tab from another tab adjacent the tab in a direction substantially perpendicular to the longitudinal axis of the tab.
25. A baffle for a heat exchanger in a deep fryer, the heat exchanger having at least one heat transfer conduit with a heating fluid passing therethrough, comprising, in combination:
a baffle plate positioned within the at least one heat transfer conduit defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of rows of tabs, each tab comprising a portion of the baffle plate bent outwardly from one of the first and second surfaces, having a longitudinal axis, and defining a crease along an intersection of the tab and the baffle plate, at least one tab in each row being positioned in the first portion of the baffle plate, at least one tab in each row being positioned in the second portion of the baffle plate, each row having the crease of all of its tabs form an acute angle with one of a portion of a longitudinal edge of the baffle plate which is upstream, with respect to the flow of heating fluid, of a main body of its respective tab and a portion of the longitudinal edge which is downstream, with respect to the flow of heating fluid, of the main body of its respective tab and the rows adjacent to the each row having the crease of all of their tabs form an acute angle with the other of a portion of the longitudinal edge which is upstream, with respect to the flow of heating fluid, of the main body of its respective tab and a portion of the longitudinal edge which is downstream, with respect to the flow of heating fluid, of the main body of its respective tab; and
a plurality of webs, each web separating a tab from another tab adjacent the tab in a direction substantially perpendicular to the longitudinal axis of the tab, the crease of at least one tab being directly downstream, with respect to the flow of heating fluid, of the web between two other tabs which are adjacent and upstream, with respect to the flow of heating fluid, of the at least one tab;
wherein the number of tabs per unit length increases along the baffle plate in a downstream direction with respect to the flow of heating fluid.
0. 37. A baffle for a heat exchanger in a deep fryer, the heat exchanger having at least one transfer conduit for heating fluid to pass therethrough, comprising, in combination:
a baffle plate positioned within the at least one heat transfer conduit defining a plane and having a first surface, and an opposed second surface and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of rows of tabs, at least three tabs in most of the rows of tabs, each tab comprising a portion of the baffle plate that is bent outwardly from one of the first and second surfaces and leaving a hole in the baffle plate, having a longitudinal axis, and defining a crease along an intersection of the tab and the baffle plate, at least one tab in each row being positioned in the first portion of the baffle plate, at least one tab in each row being positioned in the second portion of the baffle plate;
at least a portion of a side of each hole comprises the crease of the tab the hole is adjacent to, the tab extending outwardly from the baffle plate over at least part of the adjacent hole, the tab and the hole which share a crease defining a tab/hole pair;
a plurality of adjacent tabs being separated from each other by a web;
a plurality of rows of webs, at least two webs in most of the rows of webs, each web separating a tab from another adjacent tab in a direction substantially perpendicular to the longitudinal axis of the baffle plate; the tabs and webs are positioned upon the baffle plate and shaped so the tabs are capable of deflecting the heating fluid and the heating fluid is flowable between the tabs and adjacent to the webs;
and wherein the tabs are positioned and shaped so the tabs are capable of deflecting the heating fluid and the heating fluid is flowable (1) through the holes, (2) between the tabs and (3) between the tabs and the heat transfer conduit so the baffle plate, tabs, and holes are capable of collectively causing increased turbulence of the heating fluid passing through the heat transfer conduit to improve heat transfer from the heating fluid through the heat transfer conduit to the shortening within the vat of the deep fryer system as compared to a heat exchanger for a deep fryer system which does not have a baffle plate.
0. 32. A heat exchanger for a deep fryer system comprising, in combination:
at least one heat transfer conduit for heating fluid passing therethrough;
a baffle plate disposed within the at least one heat transfer conduit, defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of tabs, each tab having a longitudinal axis and extending outwardly away from one of the first and second surfaces of the baffle plate, an intersection of the tab and the baffle plate defining a crease, at least one of the tabs being positioned in the first portion of the baffle plate and at least one of the tabs being positioned in the second portion of the baffle plate;
substantially all of the tabs being separated from adjacent tabs by a web, each web separating a tab from another tab adjacent the tab in a direction substantially perpendicular to the longitudinal axis of the tab;
each of the tabs comprises a portion of the baffle plate which is bent outwardly away from one of the first and second surfaces;
each tab being positioned adjacent to a corresponding hole in the baffle plate;
the heating fluid being capable of flowing through the hole created in the baffle plate by bending said tab out of the baffle plate;
a plurality of rows of tabs, each of which rows has a tab positioned in the first portion of the baffle plate and a tab positioned in the second position of the baffle plate;
a plurality of rows of tabs, each of which rows has a tab extending outwardly away from the first surface of the baffle plate and a tab extending outwardly away from the second surface of the baffle plates;
a majority of the tab/hole pairs created by bending the tab from the baffle plate leaving a hole in the baffle plate are positioned in a plurality of rows of tab/hole pairs tabs, each row of tab/hole pairs extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate;
each row of tab/hole pairs has a tab positioned in the first portion of the baffle plate and a tab positioned in the second position of the baffle plate;
each row of tab/hole pairs has a tab extending outwardly away from the first surface of the baffle plate and a tab extending outwardly away from the second surface of the baffle plate;
a plurality of the rows of tabs have at least three tabs, a first tab positioned above the plane of the baffle plate, a second adjacent tab separated from the first tab by a web and positioned below the plane of the baffle plate, and a third tab, separated by a web from the second tab and positioned above the plane of the baffle plate; and
the tabs are located, and shaped so the tabs are capable of deflecting the heating fluid and the heating fluid is flowable (1) through the holes, (2) between the tabs and (3) between the tabs and the heat transfer conduit so the baffle plate, tabs, and holes are capable of collectively causing increased turbulence of the heating fluid passing through the heat transfer conduit to improve heat transfer from the heating fluid through the heat transfer conduit to the shortening within the vat of the deep fryer system as compared to a heat exchanger for a deep fryer system which does not utilize a baffle plate.
0. 26. A heat exchanger for a deep fryer system having a gas burner to heat fluid flowing through the heat exchanger, the heat exchanger being within a vat containing shortening, the heat exchanger comprising, in combination:
at least one heat transfer conduit having heating fluid passing therethrough;
a baffle plate disposed within the at least one heat transfer conduit defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of tabs, each tab having a longitudinal axis and extending outwardly away from one of the first and second surfaces of the baffle plate, an intersection of the tab and the baffle plate defining a crease, the crease being created by bending the tab from the baffle plate, at least one of the tabs being positioned in the first portion of the baffle plate and at least one of the tabs being positioned in the second portion of the baffle plate;
the baffle plate being positioned within the heat transfer conduit and the tabs having a length and an angle which position the tabs relative to the heat transfer conduit so the tabs do not contact the heat transfer conduit and do not prevent the heating fluid from flowing between the tabs and those portions of the heat transfer conduit most closely adjacent to each of the tabs;
the tabs being comprised of a portion of the baffle plate which is cut from the baffle plate and bent away from one of the first and second surfaces, each of the tabs leaving a hole in the baffle plate;
at least a portion of a side of each hole comprised of the crease of the tab which was cut and bent from the baffle plate to leave the hole, the tab and the hole which share a crease defining a tab/hole pair;
a plurality of webs, each web separating a first tab/hole pair from a second tab/hole pair which is adjacent to the first tab/hole pair in a direction substantially perpendicular to the longitudinal axis of the tab;
a plurality of the tabs being bent outwardly away from the first surface and a plurality of the tabs being bent outwardly away from the second surface;
a plurality of rows of tab/hole pairs, each row extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate and having at least three tab/hole pairs, each of the tab/hole pairs in each row being separated from each adjacent tab/hole pair in the row by a web;
there being at least two webs in each row of tab/hole pairs, the webs in each row of the tab/hole pairs comprising a row of webs extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate;
a plurality of rows of webs;
a plurality of rows of tab/hole pairs, which rows each have at least one tab/hole pair positioned in the first portion of the baffle plate and at least one tab/hole pair positioned in the second position of the baffle plate;
a plurality of rows of tab/hole pairs, each row of table/hole pairs having at least one tab extending outwardly away from the first surface of the baffle plate and at least one tab extending outwardly away from the second surface of the baffle plates;
the baffle plate being positioned within the heat transfer conduit and shaped so that the tabs are capable of deflecting the heating fluid so that the heating fluid is capable of flowing (1) through the holes, (2) between the tabs, (3) adjacent to the webs and (4) between the tabs and the heat transfer conduit so the baffle plate, tabs, and holes are capable of collectively causing increased turbulence of the heating fluid passing through the heat transfer conduit, the increased turbulence improving heat transfer from the heating fluid within the heat transfer conduit to the shortening within the vat of the deep fryer system as compared to a similar heat exchanger for a deep fryer system which does not utilize a baffle plate.
0. 29. A heat exchanger for a deep fryer system having a gas burner to heat fluid flowing through the heat exchanger, the heat exchanger being contained within a vat containing shortening, the heat exchanger comprising, in combination:
at least one heat transfer conduit having heating fluid passing therethrough;
a baffle plate disposed within the at least one heat transfer conduit defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of tabs, each tab having a longitudinal axis and extending outwardly away from one of the first and second surfaces of the baffle plate, an intersection of the tab and the baffle plate defining a crease, the crease being created by bending the tab from the baffle plate, at least one of the tabs being positioned in the first portion of the baffle plate and at least one of the tabs being positioned in the second portion of the baffle plate;
the baffle plate being positioned within the heat transfer conduit and the tabs having a length and an angle which position the tabs relative to the heat transfer conduit so the tabs do not contact the heat transfer conduit and do not prevent the heating fluid from flowing between the tabs and the portions of the heat transfer conduit most closely adjacent to each of the tabs;
the tabs being comprised of a portion of the baffle plate which is cut from the baffle plate and bent away from one of the first and second surfaces, each of the tabs leaving a hole in the baffle plate;
at least a portion of a side of each hole comprised of the crease of the tab which was cut and bent from the baffle to leave the hole, the tab and the hole which share a crease defining a tab/hole pair;
a plurality of webs, each web separating a first tab/hole pair from a second tab/hole pair which is adjacent to the first tab/hole pair in a direction substantially perpendicular to the longitudinal axis of the tab;
a plurality of the tabs being bent outwardly away from the first surface and a plurality of the tabs being bent outwardly away from the second surface;
at least five rows of tab/hole pairs, each row extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate and having at least four tab/hole pairs and at least three webs, each of the tab/hole pairs in each row being separated from each adjacent tab/hole pair in the row by a web;
a plurality of rows of tab/hole pairs, which rows each have a tab/hole pair positioned in the first portion of the baffle plate and a tab/hole pair positioned in the second position of the baffle plate;
a plurality of rows of tab/hole pairs, which rows have a tab extending outwardly away from the first surface of the baffle plate and a tab extending outwardly away from the second surface of the baffle plates;
the tab/hole pairs being arranged on the baffle plate so that an equal number of tabs are on either side of the center line of the first surface of the baffle plate and the tab/hole pairs are arranged on the first surface of the baffle plate symmetrically about the center line of the baffle plate and so an equal number of tabs are on either side of the center line of the second surface of the baffle plate and the tab/hole pairs are arranged on the second surface of the baffle plate symmetrically about the center line of the baffle plate;
the baffle plate is positioned and shaped so that the tabs are capable of deflecting the heating fluid so that the heating fluid is capable of flowing (1) through the holes, (2) between the tabs, (3) adjacent the webs and (4) between the tabs and the heat transfer conduit so the baffle plate, tabs, holes and webs are capable of collectively causing increased turbulence of the heating fluid passing through the heat transfer conduit, the increased turbulence improving heat transfer from the heating fluid within the heat transfer conduit to the shortening within the vat of the deep fryer system as compared to a similar heat exchanger for a deep fryer system which does not utilize a baffle plate.
0. 42. A deep fryer system having a heat exchanger and a burner to heat air flowing through the heat exchanger, the heat exchanger being within the deep fryer system's vat containing shortening, the heat exchanger portion of the deep fat fryer system comprising:
at least one heat transfer conduit having heating fluid passing therethrough;
a baffle plate disposed within the at least one heat transfer conduit defining a plane and having a first surface, an opposed second surface, and a longitudinal axis which divides the baffle plate into a first portion and a second portion;
a plurality of tabs, each tab having a longitudinal axis and extending outwardly away from one of the first and second surfaces of the baffle plate, an intersection of the tab and the baffle plate defining a crease, the crease being created by bending the tab from the baffle plate, at least one of the tabs being positioned in the first portion of the baffle plate and at least one of the tabs being positioned in the second portion of the baffle plate;
the tabs being comprised of a portion of the baffle plate which is cut from the baffle plate and bent away from one of the first and second surfaces, each of the tabs leaving a hole in the baffle plate;
at least a portion of a side of each hole is comprised of the crease of the tab which was cut and bent from the baffle to leave the hole, the tab and the hole which share a crease defining a tab/hole pair;
a plurality of webs, each web separating a first tab/hole pair from a second tab/hole pair which is adjacent to the first tab/hole pair in a direction substantially perpendicular to the longitudinal axis of the tab;
a plurality of the tabs being bent outwardly away from the first surface and a plurality of the tabs being bent outwardly away from the second surface;
a plurality of rows of tab/hole pairs, each row extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate and having at least three tab/hole pairs, each of the tab/hole pairs in each row being separated from each adjacent tab/hole pair in the row by a web;
there being at least two webs in each row of tab/hole pairs, the webs in each row of the tab/hole pairs comprising a row of webs extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate;
a plurality of rows of webs, at least two webs in most of the rows of webs, each web separating a tab from another adjacent tab in a direction substantially perpendicular to the longitudinal axis of the baffle plate; the tabs and webs are positioned and shaped so the tabs are capable of deflecting the heating fluid and the heating fluid is flowable between the tabs and adjacent to the webs;
a plurality of rows of tab/hole pairs, which rows each have at least one tab/hole pair positioned in the first portion of the baffle plate and at least one tab/hole pair positioned in the second position of the baffle plate;
a plurality of rows of tab/hole pairs; which rows have at least one tab extending outwardly away from the first surface of the baffle plate and at least one tab extending outwardly away from the second surface of the baffle plate;
a plurality of webs arranged in a straight line, one behind the other, in the direction of the longitudinal axis of the baffle plate;
wherein the crease of a plurality of tabs in each row of tabs being directly downstream with respect to the flow of the heating fluid of the creases of the tabs in the rows of tabs directly upstream and being directly upstream of the creases of the tabs in the row of tabs directly downstream; and
the baffle plate with its tab/hole pairs and webs is positioned within the conduit and shaped so that the tabs are capable of deflecting the heating fluid and the heating fluid is flowable (1) through the holes, (2) between the tabs, (3) adjacent to the webs and (4) between the tabs and the heat transfer conduit so the baffle plate, tabs, and holes are capable of collectively causing increased turbulence in the heating fluid passing through the heat transfer conduit to improve heat transfer from the heating fluid through the heat transfer conduit to the shortening within the vat of the deep fryer system as compared to a similar heat exchanger for a deep fryer system which does not utilize a baffle plate.
0. 2. A heat exchanger according to
0. 3. A heat exchanger according to
0. 4. A heat exchanger according to
0. 5. A heat exchanger according to
6. A heat exchanger according to
7. A heat exchanger according to
8. A heat exchanger according to claim 4 1, wherein the tabs are arranged in a plurality of rows, each row extending in a direction substantially perpendicular to the longitudinal axis of the baffle plate, each row having at least three tabs and the rows alternate between having the crease of each tab in a row form an acute angle with a portion of a longitudinal edge of the baffle plate which is downstream, with respect to the flow of heating fluid, of the row and having the crease of each tab in a row form an acute angle with a portion of the longitudinal edge of the baffle plate which is upstream, with respect to the flow of heating fluid, of the row.
9. A heat exchanger according to claim 4 1, wherein at least one row having the crease of each tab in that row form an acute angle with a portion of a longitudinal edge of the baffle plate which is downstream, with respect to the flow of heating fluid, of that row is separated from at least one other row having the crease of each tab in that other row form an acute angle with a portion of the longitudinal edge of the baffle plate which is upstream, with respect to the flow of heating fluid, of that row by a separate row having the crease of each tab in that separate row form a right angle with the longitudinal edge of the baffle plate.
10. A heat exchanger according to
11. A heat exchanger according to
12. A heat exchanger according to
13. A heat exchanger according to
14. A heat exchanger according to
15. A heat exchanger according to
16. A heat exchanger according to
17. A heat exchanger according to
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19. A heat exchanger according to
20. A heat exchanger according to
21. A heat exchanger according to
22. A heat exchanger according to
23. A heat exchanger according to
24. A heat exchanger according to
0. 27. A heat exchanger according to
a plurality of tabs are positioned directly downstream, with respect to the flow of heating fluid, of the web between two tabs which are adjacent and downstream of the plurality of tabs.
0. 28. A heat exchanger according to
0. 30. The heat exchanger of
0. 31. A heat exchanger according to
0. 33. A heat exchanger according to
0. 34. A heat exchanger according to
0. 35. A heat exchanger according to
0. 36. A heat exchanger according to
0. 38. The heat exchanger of
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0. 40. A heat exchanger according to
0. 41. A heat exchanger according to
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The present invention relates to a deep fryer, and more particularly, to an improved baffle for a deep fryer heat exchanger.
Deep fryers are commercially used by restaurants, institutional kitchens, and fast food establishments for cooking a variety of food products, such as french fries, fish, fried chicken, and the like. The food product is cooked by totally immersing it within a vat or tank that is filled with heated oil or shortening. The oil may be heated using a flow of heated gas that is forced or drawn through a heat exchanger having flow passages that are located within or external to the cooking vat. A gas burner is provided to heat the gas circulating within the heat exchanger. Baffles, such as spiral baffles and disc baffles, have been known to be provided within the flow passages of heat exchangers to increase the turbulent flow of gas and enhance heat transfer.
It is an object of the present invention to provide a baffle for a deep fryer which reduces or wholly overcomes some or all of the difficulties inherent in prior known devices. Particular objects and advantages of the invention will be apparent to those skilled in the art, that is, those who are knowledgeable or experienced in this field of technology, in view of the following disclosure of the invention and detailed description of certain preferred embodiments.
The principles of the invention may be used to advantage to provide a baffle for the heat exchanger of a fryer system which can improve the heat transfer from heated gas flowing through heat transfer conduits of the heat exchanger to shortening contained within a vat.
In accordance with a first aspect, a heat exchanger for a fryer system has at least one heat transfer conduit having a heating fluid passing therethrough. A baffle plate is disposed within the at least one heat transfer conduit and defines a plane. The baffle plate has a first surface, an opposed second surface, and a longitudinal axis dividing the baffle plate into a first portion and a second portion. Each of a plurality of tabs has a longitudinal axis and extends outwardly away from one of the first and second surfaces. The intersection of the tab and the baffle plate defines a crease. At least one of the tabs is positioned in the first portion of the baffle plate and at least one of the tabs is positioned in the second portion of the baffle plate. A plurality of webs are provided with each web separating a tab from other tabs adjacent in a direction substantially perpendicular to the longitudinal axis of the tab.
In accordance with another aspect, a baffle for a heat exchanger has at least one heat transfer conduit with a heating fluid passing therethrough. A baffle plate is positioned in the at least one heat transfer conduit and defines a plane. The baffle plate has a first surface, an opposed second surface, and a longitudinal axis dividing the baffle plate into a first portion and a second portion. Each tab of a plurality of rows of tabs is formed of a portion of the baffle plate bent outwardly from one of the first and second surfaces. Each tab has a longitudinal axis, and defines a crease along an intersection of the tab and the baffle plate. At least one tab in each row is positioned in the first portion of the baffle plate, and at least one tab in each row is positioned in the second portion of the baffle plate. Each row has the crease of all of its tabs form an acute angle with one of a portion of a longitudinal edge of the baffle plate which is upstream, with respect to the flow of heating fluid, of the main body of its respective tab and a portion of the longitudinal edge which is downstream, with respect to the flow of heating fluid of the main body of its respective tab. The rows adjacent to the each row have the crease of all of their tabs form an acute angle with the other of a portion of a longitudinal edge of the baffle plate which is upstream, with respect to the flow of heating fluid, of the main body of its respective tab and a portion of the longitudinal edge which is downstream, with respect to the flow of heating fluid, of the main body of its respective tab. Each web of a plurality of webs separates a tab from another tab adjacent the tab in a direction substantially perpendicular to the longitudinal axis of the tab. The crease of at least one tab is directly downstream, with respect to the flow of heating fluid, of the web between two other tabs which are adjacent and upstream of the at least one tab. The number of tabs per unit length increases along the baffle plate in a downstream direction with respect to the flow of heating fluid.
From the foregoing disclosure, it will be readily apparent to those skilled in the art, that is, those who are knowledgeable or experienced in this area of technology, that the present invention provides a significant technological advance. Preferred embodiments of the baffle for a deep fryer heat exchanger can provide increased turbulence and enhanced heat transfer within the flow passages of the heat exchanger. These and additional features and advantages of the invention disclosed here will be further understood from the following detailed disclosure of certain preferred embodiments.
Certain preferred embodiments are described in detail below with reference to the appended drawings wherein:
The figures referred to above are not drawn necessarily to scale and should be understood to present a representation of the invention, illustrative of the principles involved. Some features of the baffle depicted in the drawings have been enlarged or distorted relative to others to facilitate explanation and understanding. The same reference numbers are used in the drawings for similar or identical components and features shown in various alternative embodiments. Baffles, as disclosed herein, will have configurations and components determined, in part, by the intended application and environment in which they are used.
Referring to
A baffle plate 40 having a longitudinal axis L is shown in FIG. 3. Plate 40 has a plurality of tabs 42 extending outwardly from each of first surface 43 and second surface 45 of plate 40. Tabs 42 preferably extend outwardly at an acute angle with respect to the surface from which they extend. More preferably, tabs 42 extend outwardly at an angle of 45° with respect to the surface from which they extend. Each tab 42 has a longitudinal axis A which is perpendicular to crease 44. In a preferred embodiment, each tab 42 is formed by cutting plate 40 and bending a portion of plate 40 outwardly, forming crease 44 at the joint where tab 42 is bent away from plate 40. Although tabs 42 may be formed by securing separate pieces of material to plate 40, such as by welding, in which case crease 44 would extend along the line of intersection of tab 42 and plate 40, forming tabs 42 by bending a portion of plate 40 outwardly removes the welds as a potential point of failure of plate 40. Web 46 is the portion of plate 40 which remains between tabs 42 adjacent to one another in a direction substantially perpendicular to longitudinal axis A. In the embodiment illustrated in
As seen in
As illustrated in the embodiment shown in
In certain preferred embodiments, a firebox (not shown) housing the flame produced by the burning gas is provided in burner section 11. In other preferred embodiments, there is no firebox and the flame extends directly into a single heat transfer tube 16, preferably having a circular cross section. In embodiments without a firebox, tabs 42 of plates 40 enable more complete combustion by causing better mixing of the gas and air within the single heat transfer tube 16. Additionally, where three or more plates 40 are positioned within heat transfer tube 16, the centermost plates, which reach higher temperatures since they are further from the lower temperature shortening contained in the vat, can improve combustion by reheating cool air which is introduced to the mixture. Tabs 42 and plates 40 can also increase heat transfer through radiation. Such an embodiment is shown in
In another alternative embodiment shown in
Another alternative embodiment is shown in
Yet another alternative embodiment is shown in
Another alternative embodiment is shown in
As shown in
As shown in FIG. 3 and as discussed herein, tabs 42 comprise portions of plate 40 which are bent outwardly away from either first surface 41 or second surface 43 of plate 40. As shown in FIGS. 3 and 6-9, at least one of tabs 42 is positioned in the first portion 54 of plate 40 on one side of the longitudinal axis of plate 40 designated as “L” in FIGS. 3 and 6-9 and at least one other of tabs 42 is positioned in second portion 56 of plate 40 which is on the other side of plate 40's longitudinal axis L.
As shown in
As shown in FIGS. 3 and 6-9, in some embodiments, for the purpose of describing location and distribution of invention elements, a center line of plate 40 may be located where the longitudinal axis is shown located along the center of plate 40. As shown in the figures, in some embodiments tabs 42, holes 58 and tab/hole pairs are arranged so the same are found on both sides of the center line. Further, as shown in the figures and described herein, in some embodiments these elements are also arranged symmetrically in a pattern about the center line. In such embodiments, as shown in the figures, the portion of the plate 40 referred to as first portion 54 is instead referred to as first half 54 and the portion of plate 40 referred to as second portion 56 is instead referred to as second half 56.
As shown in
As shown in
Each tab 42 and its corresponding hole 58, share a common crease 44 and are referred to herein as comprising a “tab/hole pair.” As shown in
As shown in
As shown in FIGS. 3 and 6-9, each row of tabs 42, holes 58 and tab/hole pairs may be comprised of at least two tabs, two holes or two tab/hole pairs, or at least three tabs, three holes and three tab/hole pairs, or at least four tabs, four holes and four tab/hole pairs.
As shown in FIGS. 3 and 6-9, each row has n−1 webs, where n equals the number of tab/hole pairs in the row. If a row is comprised of three tabs and three holes, i.e. three tab/hole pairs, that row has two webs (3 tab/hole pairs−1=2 webs). If a row is comprised of four tabs and four holes, i.e. four tab/hole pairs, that row has three webs (4 tab/hole pairs−1=3 webs).
As shown in
As shown in the Figs., an equal or approximately equal number of tabs, holes, webs, and tab hole pairs may be arranged on either side of the center line of baffle plate 40 on both sides of the baffle plate, which is shown in FIGS. 3 and 6-9 as corresponding with longitudinal axis L. As shown in FIGS. 3 and 6-9, they may be and arranged generally symmetrically about the longitudinal axis L. As shown in
In light of the foregoing disclosure of the invention and description of the preferred embodiments, those skilled in this area of technology will readily understand that various modifications and adaptations can be made without departing from the true scope and spirit of the invention. All such modifications and adaptations are intended to be covered by the following claims:
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