US20010011588A1 - Cooking apparatus insulated by non-fibrous means - Google Patents
Cooking apparatus insulated by non-fibrous means Download PDFInfo
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- US20010011588A1 US20010011588A1 US09/755,288 US75528801A US2001011588A1 US 20010011588 A1 US20010011588 A1 US 20010011588A1 US 75528801 A US75528801 A US 75528801A US 2001011588 A1 US2001011588 A1 US 2001011588A1
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- cooking apparatus
- heat
- compartment
- insulating material
- metal sheets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/34—Elements and arrangements for heat storage or insulation
Definitions
- This invention relates to cooking apparatus and, more particularly, to a cooking apparatus with non-fibrous insulation.
- the non-fibrous insulation enhances heat management in a controlled manner.
- Cooking equipment is typically insulated using various types of fibrous insulation, such as fiberglass, cellulose, mineral wool, etc.
- fibrous insulation such as fiberglass, cellulose, mineral wool, etc.
- the purpose of the insulation is to serve as a barrier to prevent heat from escaping the oven cavity and elevating the temperature of the exterior portion of the cooking apparatus creating hazardous operating conditions.
- Another disadvantage is that fibrous insulation absorbs liquid that may effectively reduce its insulating capability over time. This moisture absorption is also detrimental to the long-term life of the oven and its component parts. Furthermore, fibrous materials are not recyclable. Accordingly, there is a need for an improved insulation for cooking equipment that avoids the aforementioned disadvantages.
- cooking equipment are generally known in the art to use natural convection as the sole method of heat removal. Accordingly, a need also exists for an efficient and controlled management of heat removal in cooking equipment.
- the present invention provides a cooking apparatus having a heatable component that is at least partially insulated by a heat insulating material.
- the heat insulating material comprises a plurality of metal sheets spaced apart from each other by a separator.
- the heat insulating material also includes a heat sink that comprises a plurality of metal sheets that are compressed forming a stack.
- the heat insulating material includes a heat radiating surface and a heat reflective surface, which are substantially parallel and face opposite directions.
- the heat reflective surface faces the heatable component, preferably a convection oven. Heat from the convection oven is reflected back towards the oven thereby reducing unwanted heat loss in the oven compartment. Heat is also conducted across the length and width of this surface, preferably an aluminum sheet. Heat is than radiated from this first metal sheet to a second sheet disposed underneath the first metal sheet. This same process is continued to a next underneath sheet, etc., until a last underneath sheet again functions in the same way. This last underneath sheet has a heat radiating surface that faces an air path in the oven compartment.
- Passing an air stream through the cooking apparatus from an inlet to an outlet typically creates the air path.
- the air stream is directed into two paths.
- the first path includes the controls compartment and the second path includes the oven compartment.
- the second air path, in the oven compartment is passed along peaks and troughs on the heat radiating surface.
- the peaks and troughs are oriented to aid in the management of the airflow through the oven compartment
- heat is radiated from the heat-radiating surface into the air path.
- the cooking apparatus is efficiently cooled by directing airflow through the oven compartment, radiating heat into the air path, and controlling the airflow through the compartment by the peaks and troughs.
- the insulation is non-fibrous insulation in which the metal sheets are spaced apart by a separator.
- the present invention provides a non-fibrous insulation having a separator comprising a plurality of embossments. The embossments extend from the metal sheets and maintain the spaced apart relationship. Thus, insulating layers are formed between each metal sheet.
- the present invention provides a non-fibrous insulation having a separator comprising a metal foil being formed in a geometric spacing pattern, preferably a hexagon.
- the separator is disposed between each metal sheet to maintain the spaced apart relationship, thereby forming insulating layers.
- FIG. I is a perspective view of a cooking apparatus according to the present invention.
- FIGS. 2 and 3 are cross-sectional views of alternate heat insulating materials that can be used in the present invention.
- FIG. 4 is a perspective view of the geometric spacing pattern of the FIG. 3 insulation
- FIG. 5 is a top view of the cooking apparatus of FIG. 1 with the top panel removed;
- FIG. 6 is a side elevation view along line 6 - 6 of FIG. 5;
- FIG. 7 is a side elevation view along line 7 - 7 of FIG. 5;
- FIG. 8 is a side elevation view along line 8 - 8 of FIG. 5.
- Cooking apparatus 10 includes a heatable component 12 that is insulated by heat insulating material 60 .
- heatable component 12 is a convection oven.
- Cooking apparatus 10 further includes an oven compartment 18 , a controls compartment 16 , an inlet 22 , an outlet 24 and a fan 32 .
- Oven compartment 18 and controls compartment 16 are formed by a vertical panel 14 .
- Convection oven 12 is disposed in oven component compartment 18 .
- a control group 30 is disposed in controls compartment 16 .
- Fan 32 forms an air stream 20 between inlet 22 and outlet 24 .
- Air stream 20 is directed in a first air path 26 through controls compartment 16 and a second air path 28 through oven compartment 18 .
- Panel 14 has a slot 34 there through for the purpose of allowing airflow between controls compartment 16 and oven compartment 18 .
- Panel 14 is connected to cooking apparatus 10 by a loose tolerance fit 36 (shown in FIG. 8).
- heat insulating material 60 comprises a plurality of metal sheets 62 a , 62 b , 62 c , and 62 d .
- Metal sheets 62 a , 62 b , 62 c , and 62 d are spaced apart from each other by a separator 64 .
- Heat insulating material 60 includes a heat sink 70 .
- Heat sink 70 comprises two or more of metal sheets 62 a , 62 b , 62 c , and 62 d that extend into heat sink 70 and form a compressed stack 76 .
- Metal sheets 62 a , 62 b , 62 c , and 62 d in heat sink 70 are secured together by securing means 78 .
- Securing means 78 is preferably a metallurgical bond.
- Heat insulating material 60 includes a plurality of insulating layers 68 a , 68 b , 68 c , and 68 d , as shown in FIG. 2.
- Heat sink 70 and insulating layers 68 a , 68 b , 68 c , and 68 d are adjacent to one another.
- Heat sink 70 provides better heat conduction in a vertical direction than insulating layers 68 a , 68 b , 68 c , and 68 d.
- Heat insulating material 60 includes a heat radiating surface 72 and a heat reflective surface 74 , which are substantially parallel and face opposite directions from each other. Heat reflective surface 74 faces convection oven 12 . Heat radiating surface 72 has undulations forming peaks 86 and troughs 88 . Heat radiating surface 72 is preferably a black coating surface, which increases the emissivity of the surface and decreases the reflectivity. Heat reflective surface 74 is preferably aluminum foil, which has a high reflectivity on the order of 95% and a low emissivity of about 10%.
- Heat insulating material 60 includes a plurality of embossments 80 a , 80 b , 80 c , and 80 d .
- First insulating layer 65 a includes first metal sheet 62 a .
- First metal sheet 62 a includes embossments 80 a arranged in a uniform pattern.
- Second insulating layer 68 b includes second metal sheet 62 b .
- Second metal sheet 62 b includes embossments 80 b and 80 c .
- Embossments 80 b are arranged in a uniform pattern on one side of second metal sheet 62 b and embossments 80 c are arranged in a non-uniform pattern on the other side thereof.
- Third insulating layer 68 c includes third metal sheet 62 c that is a generally flat sheet.
- Fourth insulating layer 68 d includes fourth metal sheet 62 d .
- Fourth metal sheet 62 d includes embossments 80 d arranged in a non-uniform pattern.
- heat insulating material 60 comprises a plurality of metal sheets 63 a , 63 b , 63 c , 63 d , and 63 e .
- Metal sheets 63 a , 63 b , 63 c , 63 d , and 63 e are spaced apart from each other by a separator 65 .
- Heat insulating material 60 includes a heat sink 71 .
- Heat sink 71 comprises two or more of metal sheets 63 a , 63 b , 63 c , 63 d , and 63 e that extend into heat sink 71 and form a compressed stack 77 .
- Securing means 79 is preferably a metallurgical bond.
- Heat insulating material 60 includes a plurality of insulating layers 69 a , 69 b , 69 c , and 69 d , as shown in FIG. 3.
- Heat sink 71 and insulating layers 69 a , 69 b , 69 c , and 69 d are adjacent to one another.
- Heat sink 71 provides better heat conduction in a vertical direction than insulating layers 69 a , 69 b , 69 c , and 69 d.
- Heat insulating material 60 includes a heat radiating surface 72 and a heat reflective surface 74 , which are substantially parallel and face opposite directions from each other. Heat reflective surface 74 faces convection oven 12 . Heat radiating surface 72 has undulations forming peaks 86 and troughs 88 . Heat radiating surface 72 is preferably a black coating surface, which increases the emissivity of the surface and decreases the reflectivity. Heat reflective surface 74 is preferably aluminum foil, which has a high reflectivity on the order of 95% and a low emissivity of about 10%.
- First insulating layer 69 a includes a first separator structure 65 a that is disposed between first metal sheet 63 a and second metal sheet 63 b , thereby forming first insulating layer 69 a .
- First separator structure 65 a includes a first metal foil 82 a .
- First metal foil 82 a is formed in a geometric spacing pattern 84 throughout first insulating layer 69 a , thereby separating first metal sheet 63 a and second metal sheet 63 b.
- Second insulating layer 69 b includes a second separator structure 65 b that is disposed between second metal sheet 63 b and third metal sheet 63 c , thereby forming second insulating layer 69 b .
- Second separator structure 65 b includes a second metal foil 82 b .
- Second metal foil 82 b is formed in a geometric spacing pattern 84 throughout second insulating layer 69 b , thereby separating second metal sheet 63 b and third metal sheet 63 c.
- Third insulating layer 69 c includes a third separator structure 65 c that is disposed between third metal sheet 63 c and fourth metal sheet 63 d , thereby forming third insulating layer 69 c .
- Third separator structure 65 c includes a third metal foil 82 c .
- Third metal foil 82 c is formed in a geometric spacing pattern 84 throughout third insulating layer 69 c , thereby separating third metal sheet 63 c and fourth metal sheet 63 d.
- Fourth insulating layer 69 d includes a fourth separator structure 65 d that is disposed between fourth metal sheet 63 d and fifth metal sheet 63 e , thereby forming fourth insulating layer 69 e .
- Fourth separator structure 65 d includes a fourth metal foil 82 d .
- Fourth metal foil 82 d is formed in a geometric spacing pattern 84 throughout fourth insulating layer 68 e , thereby separating fourth metal sheet 63 d and fifth metal sheet 63 e.
- geometric spacing pattern 84 is a hexagon 90 .
- a significant feature of the present invention is the construction of heat insulating material 60 .
- Heat insulating material 60 is constructed of non-fibrous material and is safer and less costly to use in the production of cooking apparatus 10 .
- heat insulating material 60 is thinner than the traditional fibrous insulation, thereby reducing the overall size of cooking apparatus 10 . This reduction in size of cooking apparatus 10 allows the present invention to be used in places where space is at a premium, thereby reducing operating expenses.
- non-fibrous material construction of heat insulating material 60 is preferred in caustic environments, which occur in cooking equipment, because this type of material can better endure high temperatures, high moisture levels, and corrosive conditions than conventional type fiber insulators.
- non-fibrous materials have a greater rigidity and compressive strength which allows heat insulating material 60 to withstand greater impacts during use.
- FIGS. 2 and 3 Another significant feature of the present invention is the spaced apart relationship of the metal sheets, as shown in FIGS. 2 and 3, of heat insulating material 60 .
- the space between the sheets provides pockets of air for insulation.
- a first sheet, adjacent to a heat source absorbs heat, and this heat is than conducted across the length and width of the first sheet. Heat is also radiated from the first sheet to a second sheet disposed underneath the first sheet.
- This same process is continued to a next underneath sheet, etc., until a last underneath sheet again functions in the same manner as described above in connection with the first sheet.
- the last underneath sheet in this process is kept relatively cool and thus components kept next to this sheet are also relatively cool.
- the separators maintain the spaced apart relationship between the sheets. At every point of contact between the metal sheets, unwanted conduction heat transfer through the insulator occurs.
- the separator will also decrease the movement of convection currents between adjacent metal sheets. This decreases unwanted heat transfer by convection through the insulator.
- it is preferable to maintain this spaced apart relationship with as few point contacts as possible and with minimal air currents between adjacent sheets.
- Heat sink 70 and heat reflective surface 74 allow heat insulating material 60 to better manage heat transfer.
- Heat reflective surface 74 which has a reflectivity on the order of 95%, significantly reduces heat loss from oven compartment 18 by reflecting heat back at convection oven 12 .
- the heat that does manage to escape is conducted away towards heat sink 70 .
- Heat sink 70 can be coated with an emissive material allowing the heat to be radiated away from heat insulating material 60 .
- heat insulating material 60 can either reflect heat back at the source, convection oven 12 , or direct heat away from the source towards heat sink 70 .
- the present invention also provides a novel dual airflow path 26 and 28 through control compartment 16 and oven compartment 18 .
- This feature allows cooling air stream 20 to flow through first air path 26 , including control compartment 16 , and second air path 28 , including oven compartment 18 , thereby aiding in the efficient removal of heat from cooking apparatus 10 .
- Cooking apparatus 10 also includes heat radiating surface 72 which is positioned such that peaks 86 and troughs 88 are aligned with second air path 28 to aid in the management of airflow through oven compartment 18 .
- Heat radiating surface 72 has heat radiating means that aids in the transfer of heat away from heat insulating material 60 and towards air stream 20 . Peaks 86 and troughs 88 efficiently control air stream 20 through oven compartment 18 , thereby cooling oven compartment 18 efficiently.
- air stream 20 is formed to pass through and cool cooking apparatus 10 .
- Air stream 20 enters cooking apparatus 10 through inlet 22 .
- Air stream 20 is directed into first air path 26 and second air path 28 by means of loose tolerance fitting 36 of panel 14 .
- First air path 26 includes controls compartment 16 and cools control group 30 .
- Second air path 28 includes oven compartment 18 and cools convection oven 12 , as discussed above.
- First air path 26 and second air path 28 are merged together at slot 34 in panel 14 and are exhausted out of cooking apparatus 10 through outlet 24
- the method of cooling cooking apparatus 10 by dual air paths 26 and 28 , is an efficient method of managing heat transfer.
Abstract
Description
- This invention relates to cooking apparatus and, more particularly, to a cooking apparatus with non-fibrous insulation. In one embodiment of the present invention, the non-fibrous insulation enhances heat management in a controlled manner.
- Cooking equipment is typically insulated using various types of fibrous insulation, such as fiberglass, cellulose, mineral wool, etc. The purpose of the insulation is to serve as a barrier to prevent heat from escaping the oven cavity and elevating the temperature of the exterior portion of the cooking apparatus creating hazardous operating conditions.
- Several materials, such as fiberglass, cellulose, and mineral wool are currently used as insulation in cooking equipment. However, these materials have some disadvantages. Some of these materials cause irritation to human skin. This requires assembly personnel to wear protective clothing when handling such materials.
- All of these fibrous insulation materials are hazardous to human health, when consumed. This causes a problem when particles of the insulation break off and contaminate food.
- In addition, these materials may create air-borne particles that are hazardous to assembly personnel during handling and installation. This necessitates a need for such personnel to use breathing filters. Thus, the cost of production is increased because special precautions must be used when handling fibrous insulation.
- Another disadvantage is that fibrous insulation, as used in cooking equipment, is generally bulky material. This requires the cooking equipment to be unnecessarily large in size to house such unwieldy material. The cost of production of cooking equipment is increased because of the extra material that is needed to build a large enough housing for the fibrous insulation to fit. In addition, cooking equipment with this insulation is more expensive to operate because they take up more space during operation. In locations where space is at a premium, the overhead costs of operating cooking equipment with fibrous insulation will be increased.
- Another disadvantage is that fibrous insulation absorbs liquid that may effectively reduce its insulating capability over time. This moisture absorption is also detrimental to the long-term life of the oven and its component parts. Furthermore, fibrous materials are not recyclable. Accordingly, there is a need for an improved insulation for cooking equipment that avoids the aforementioned disadvantages.
- Furthermore, cooking equipment are generally known in the art to use natural convection as the sole method of heat removal. Accordingly, a need also exists for an efficient and controlled management of heat removal in cooking equipment.
- The present invention provides a cooking apparatus having a heatable component that is at least partially insulated by a heat insulating material. The heat insulating material comprises a plurality of metal sheets spaced apart from each other by a separator. The heat insulating material also includes a heat sink that comprises a plurality of metal sheets that are compressed forming a stack.
- The heat insulating material includes a heat radiating surface and a heat reflective surface, which are substantially parallel and face opposite directions. The heat reflective surface faces the heatable component, preferably a convection oven. Heat from the convection oven is reflected back towards the oven thereby reducing unwanted heat loss in the oven compartment. Heat is also conducted across the length and width of this surface, preferably an aluminum sheet. Heat is than radiated from this first metal sheet to a second sheet disposed underneath the first metal sheet. This same process is continued to a next underneath sheet, etc., until a last underneath sheet again functions in the same way. This last underneath sheet has a heat radiating surface that faces an air path in the oven compartment.
- Passing an air stream through the cooking apparatus from an inlet to an outlet typically creates the air path. The air stream is directed into two paths. The first path includes the controls compartment and the second path includes the oven compartment. The second air path, in the oven compartment, is passed along peaks and troughs on the heat radiating surface. The peaks and troughs are oriented to aid in the management of the airflow through the oven compartment In addition, heat is radiated from the heat-radiating surface into the air path. Thus, the cooking apparatus is efficiently cooled by directing airflow through the oven compartment, radiating heat into the air path, and controlling the airflow through the compartment by the peaks and troughs.
- Preferably, the insulation is non-fibrous insulation in which the metal sheets are spaced apart by a separator. In one preferred embodiment, the present invention provides a non-fibrous insulation having a separator comprising a plurality of embossments. The embossments extend from the metal sheets and maintain the spaced apart relationship. Thus, insulating layers are formed between each metal sheet.
- In a second embodiment, the present invention provides a non-fibrous insulation having a separator comprising a metal foil being formed in a geometric spacing pattern, preferably a hexagon. The separator is disposed between each metal sheet to maintain the spaced apart relationship, thereby forming insulating layers.
- Other and further objects, advantages and features of the present invention will be understood by reference to the following specification in conjunction with the annexed drawings, wherein like parts have been given like numbers.
- FIG. I is a perspective view of a cooking apparatus according to the present invention;
- FIGS. 2 and 3 are cross-sectional views of alternate heat insulating materials that can be used in the present invention;
- FIG. 4 is a perspective view of the geometric spacing pattern of the FIG. 3 insulation;
- FIG. 5 is a top view of the cooking apparatus of FIG. 1 with the top panel removed;
- FIG. 6 is a side elevation view along line6-6 of FIG. 5;
- FIG. 7 is a side elevation view along line7-7 of FIG. 5; and
- FIG. 8 is a side elevation view along line8-8 of FIG. 5.
- Referring to FIGS. 1, 5,6, 7, and 8, the cooking apparatus of the present invention is generally referred to by
reference numeral 10.Cooking apparatus 10 includes aheatable component 12 that is insulated byheat insulating material 60. In one embodiment,heatable component 12 is a convection oven.Cooking apparatus 10 further includes anoven compartment 18, acontrols compartment 16, aninlet 22, anoutlet 24 and afan 32.Oven compartment 18 and controlscompartment 16 are formed by avertical panel 14.Convection oven 12 is disposed inoven component compartment 18. Acontrol group 30 is disposed incontrols compartment 16. -
Fan 32 forms anair stream 20 betweeninlet 22 andoutlet 24.Air stream 20 is directed in afirst air path 26 throughcontrols compartment 16 and asecond air path 28 throughoven compartment 18.Panel 14 has aslot 34 there through for the purpose of allowing airflow betweencontrols compartment 16 andoven compartment 18.Panel 14 is connected to cookingapparatus 10 by a loose tolerance fit 36 (shown in FIG. 8). - Referring to FIG. 2, in which like components have like reference numbers,
heat insulating material 60 comprises a plurality ofmetal sheets Metal sheets separator 64. Heat insulatingmaterial 60 includes aheat sink 70.Heat sink 70 comprises two or more ofmetal sheets heat sink 70 and form acompressed stack 76.Metal sheets heat sink 70 are secured together by securingmeans 78. Securing means 78 is preferably a metallurgical bond. -
Heat insulating material 60 includes a plurality of insulatinglayers Heat sink 70 and insulatinglayers Heat sink 70 provides better heat conduction in a vertical direction than insulatinglayers -
Heat insulating material 60 includes aheat radiating surface 72 and a heatreflective surface 74, which are substantially parallel and face opposite directions from each other. Heatreflective surface 74 facesconvection oven 12.Heat radiating surface 72 hasundulations forming peaks 86 andtroughs 88.Heat radiating surface 72 is preferably a black coating surface, which increases the emissivity of the surface and decreases the reflectivity. Heatreflective surface 74 is preferably aluminum foil, which has a high reflectivity on the order of 95% and a low emissivity of about 10%. -
Heat insulating material 60 includes a plurality ofembossments first metal sheet 62 a.First metal sheet 62 a includesembossments 80 a arranged in a uniform pattern. -
Second insulating layer 68 b includessecond metal sheet 62 b.Second metal sheet 62 b includesembossments Embossments 80 b are arranged in a uniform pattern on one side ofsecond metal sheet 62 b andembossments 80 c are arranged in a non-uniform pattern on the other side thereof. - Third insulating
layer 68 c includesthird metal sheet 62 c that is a generally flat sheet. -
Fourth insulating layer 68 d includesfourth metal sheet 62 d.Fourth metal sheet 62 d includesembossments 80 d arranged in a non-uniform pattern. - Referring to FIG. 3, in which like components have like reference numbers,
heat insulating material 60 comprises a plurality ofmetal sheets Metal sheets separator 65. Heat insulatingmaterial 60 includes aheat sink 71.Heat sink 71 comprises two or more ofmetal sheets heat sink 71 and form acompressed stack 77.Metal sheets heat sink 71 are secured together by securing means 79. Securing means 79 is preferably a metallurgical bond. -
Heat insulating material 60 includes a plurality of insulatinglayers Heat sink 71 and insulatinglayers Heat sink 71 provides better heat conduction in a vertical direction than insulatinglayers -
Heat insulating material 60 includes aheat radiating surface 72 and a heatreflective surface 74, which are substantially parallel and face opposite directions from each other. Heatreflective surface 74 facesconvection oven 12.Heat radiating surface 72 hasundulations forming peaks 86 andtroughs 88.Heat radiating surface 72 is preferably a black coating surface, which increases the emissivity of the surface and decreases the reflectivity. Heatreflective surface 74 is preferably aluminum foil, which has a high reflectivity on the order of 95% and a low emissivity of about 10%. - First insulating layer69 a includes a first separator structure 65 a that is disposed between
first metal sheet 63 a andsecond metal sheet 63 b, thereby forming first insulating layer 69 a. First separator structure 65 a includes a first metal foil 82 a. First metal foil 82 a is formed in ageometric spacing pattern 84 throughout first insulating layer 69 a, thereby separatingfirst metal sheet 63 a andsecond metal sheet 63 b. -
Second insulating layer 69 b includes a second separator structure 65 b that is disposed betweensecond metal sheet 63 b andthird metal sheet 63 c, thereby forming second insulatinglayer 69 b. Second separator structure 65 b includes a second metal foil 82 b. Second metal foil 82 b is formed in ageometric spacing pattern 84 throughout second insulatinglayer 69 b, thereby separatingsecond metal sheet 63 b andthird metal sheet 63 c. - Third insulating layer69 c includes a third separator structure 65 c that is disposed between
third metal sheet 63 c andfourth metal sheet 63 d, thereby forming third insulating layer 69 c. Third separator structure 65 c includes a third metal foil 82 c. Third metal foil 82 c is formed in ageometric spacing pattern 84 throughout third insulating layer 69 c, thereby separatingthird metal sheet 63 c andfourth metal sheet 63 d. -
Fourth insulating layer 69 d includes a fourth separator structure 65 d that is disposed betweenfourth metal sheet 63 d andfifth metal sheet 63 e, thereby forming fourth insulating layer 69 e. Fourth separator structure 65 d includes a fourth metal foil 82 d. Fourth metal foil 82 d is formed in ageometric spacing pattern 84 throughout fourth insulating layer 68 e, thereby separatingfourth metal sheet 63 d andfifth metal sheet 63 e. - Referring to FIG. 4, in a preferred embodiment of the invention,
geometric spacing pattern 84 is ahexagon 90. - A significant feature of the present invention is the construction of
heat insulating material 60. Heat insulatingmaterial 60 is constructed of non-fibrous material and is safer and less costly to use in the production ofcooking apparatus 10. In addition,heat insulating material 60 is thinner than the traditional fibrous insulation, thereby reducing the overall size ofcooking apparatus 10. This reduction in size ofcooking apparatus 10 allows the present invention to be used in places where space is at a premium, thereby reducing operating expenses. - Furthermore, the non-fibrous material construction of
heat insulating material 60 is preferred in caustic environments, which occur in cooking equipment, because this type of material can better endure high temperatures, high moisture levels, and corrosive conditions than conventional type fiber insulators. In addition, non-fibrous materials have a greater rigidity and compressive strength which allowsheat insulating material 60 to withstand greater impacts during use. - Another significant feature of the present invention is the spaced apart relationship of the metal sheets, as shown in FIGS. 2 and 3, of
heat insulating material 60. The space between the sheets provides pockets of air for insulation. A first sheet, adjacent to a heat source absorbs heat, and this heat is than conducted across the length and width of the first sheet. Heat is also radiated from the first sheet to a second sheet disposed underneath the first sheet. This same process is continued to a next underneath sheet, etc., until a last underneath sheet again functions in the same manner as described above in connection with the first sheet. The last underneath sheet in this process is kept relatively cool and thus components kept next to this sheet are also relatively cool. - In addition, the separators, as shown in FIGS. 2 and 3, maintain the spaced apart relationship between the sheets. At every point of contact between the metal sheets, unwanted conduction heat transfer through the insulator occurs. The separator will also decrease the movement of convection currents between adjacent metal sheets. This decreases unwanted heat transfer by convection through the insulator. Thus, it is preferable to maintain this spaced apart relationship with as few point contacts as possible and with minimal air currents between adjacent sheets.
- Another significant feature of
cooking apparatus 10 is the construction and placement of heatreflective surface 74 andheat sink 70.Heat sink 70 and heatreflective surface 74 allowheat insulating material 60 to better manage heat transfer. Heatreflective surface 74, which has a reflectivity on the order of 95%, significantly reduces heat loss fromoven compartment 18 by reflecting heat back atconvection oven 12. The heat that does manage to escape is conducted away towardsheat sink 70.Heat sink 70 can be coated with an emissive material allowing the heat to be radiated away fromheat insulating material 60. Thus, heat insulatingmaterial 60 can either reflect heat back at the source,convection oven 12, or direct heat away from the source towardsheat sink 70. - The present invention also provides a novel
dual airflow path control compartment 16 andoven compartment 18. This feature allows coolingair stream 20 to flow throughfirst air path 26, includingcontrol compartment 16, andsecond air path 28, includingoven compartment 18, thereby aiding in the efficient removal of heat from cookingapparatus 10. -
Cooking apparatus 10 also includesheat radiating surface 72 which is positioned such thatpeaks 86 andtroughs 88 are aligned withsecond air path 28 to aid in the management of airflow throughoven compartment 18.Heat radiating surface 72 has heat radiating means that aids in the transfer of heat away fromheat insulating material 60 and towardsair stream 20.Peaks 86 andtroughs 88 efficiently controlair stream 20 throughoven compartment 18, thereby coolingoven compartment 18 efficiently. - According to the method of the present invention,
air stream 20 is formed to pass through andcool cooking apparatus 10.Air stream 20 enterscooking apparatus 10 throughinlet 22.Air stream 20 is directed intofirst air path 26 andsecond air path 28 by means of loose tolerance fitting 36 ofpanel 14.First air path 26 includescontrols compartment 16 and coolscontrol group 30.Second air path 28 includesoven compartment 18 and coolsconvection oven 12, as discussed above.First air path 26 andsecond air path 28 are merged together atslot 34 inpanel 14 and are exhausted out ofcooking apparatus 10 throughoutlet 24 The method of coolingcooking apparatus 10, bydual air paths - The present invention having been thus described with particular reference to the preferred forms thereof, it will be obvious that various changes and modifications may be made therein without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (22)
Priority Applications (1)
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US09/755,288 US6378602B2 (en) | 2000-02-04 | 2001-01-05 | Cooking apparatus insulated by non-fibrous means |
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US09/498,117 US6494130B2 (en) | 2000-02-04 | 2000-02-04 | Cooking apparatus insulated by non-fibrous means |
US09/755,288 US6378602B2 (en) | 2000-02-04 | 2001-01-05 | Cooking apparatus insulated by non-fibrous means |
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US09/498,117 Division US6494130B2 (en) | 2000-02-04 | 2000-02-04 | Cooking apparatus insulated by non-fibrous means |
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US20010011588A1 true US20010011588A1 (en) | 2001-08-09 |
US6378602B2 US6378602B2 (en) | 2002-04-30 |
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US09/755,288 Expired - Lifetime US6378602B2 (en) | 2000-02-04 | 2001-01-05 | Cooking apparatus insulated by non-fibrous means |
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EP (1) | EP1253845A4 (en) |
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US9677774B2 (en) | 2015-06-08 | 2017-06-13 | Alto-Shaam, Inc. | Multi-zone oven with variable cavity sizes |
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US9879865B2 (en) | 2015-06-08 | 2018-01-30 | Alto-Shaam, Inc. | Cooking oven |
US10337745B2 (en) | 2015-06-08 | 2019-07-02 | Alto-Shaam, Inc. | Convection oven |
US10088172B2 (en) | 2016-07-29 | 2018-10-02 | Alto-Shaam, Inc. | Oven using structured air |
WO2018216298A1 (en) * | 2017-05-24 | 2018-11-29 | 三菱電機株式会社 | Electric rice cooker and heating cooking system |
CN216535005U (en) | 2020-04-06 | 2022-05-17 | 沙克忍者运营有限责任公司 | Cooking system |
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US777103A (en) * | 1903-07-01 | 1904-12-13 | James S Maccoy | Apparatus for cooking by retained heat. |
US1249620A (en) * | 1916-03-20 | 1917-12-11 | Colin F Hardy | Dough-raiser. |
US3478674A (en) * | 1967-08-10 | 1969-11-18 | Joe Lewis Medeiros | Oven for cooking food using coals and stored heat |
US4180049A (en) * | 1978-01-09 | 1979-12-25 | Whirlpool Corporation | Oven assembly air circulation system |
US4886046A (en) * | 1987-10-26 | 1989-12-12 | Whirlpool Corporation | Motor control circuit for an eye level range |
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US5111577A (en) | 1990-01-22 | 1992-05-12 | Atd Corporation | Pad including heat sink and thermal insulation areas |
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US5801362A (en) * | 1994-01-14 | 1998-09-01 | Hudson Standard Corporation | Portable electric oven with fan and motor arrangement for improved heated air flow and motor cooling |
US5524406A (en) * | 1994-03-24 | 1996-06-11 | Atd Corporation | Insulating apparatus and method for attaching an insulating pad to a support |
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KR960018364A (en) * | 1994-11-28 | 1996-06-17 | 이헌조 | Thermopile chiller and method of microwave oven |
DE19543315A1 (en) * | 1995-11-21 | 1997-05-22 | Aeg Hausgeraete Gmbh | Heat-insulating cover for thermotechnical devices |
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US5939212A (en) * | 1997-06-09 | 1999-08-17 | Atd Corporation | Flexible corrugated multilayer metal foil shields and method of making |
IT1292485B1 (en) * | 1997-07-04 | 1999-02-08 | Whirlpool Co | VENTILATION SYSTEM FOR ELECTRIC FOOD COOKING APPLIANCES INCLUDING A HOB AND AN OVEN |
-
2000
- 2000-02-04 US US09/498,117 patent/US6494130B2/en not_active Expired - Fee Related
-
2001
- 2001-01-05 US US09/755,288 patent/US6378602B2/en not_active Expired - Lifetime
- 2001-01-12 WO PCT/US2001/001205 patent/WO2001056443A1/en active Application Filing
- 2001-01-12 EP EP01903065A patent/EP1253845A4/en not_active Withdrawn
- 2001-01-12 AU AU2001230930A patent/AU2001230930A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2869397A1 (en) * | 2004-04-26 | 2005-10-28 | Seb Sa | FOOD COOKING OVEN |
WO2005111509A1 (en) * | 2004-04-26 | 2005-11-24 | Seb S.A. | Food preparation oven |
US20200286757A1 (en) * | 2019-03-08 | 2020-09-10 | Dsgi Technologies, Inc. | Apparatus for annealing semiconductor integrated circuit wafers |
Also Published As
Publication number | Publication date |
---|---|
EP1253845A4 (en) | 2007-01-24 |
US6494130B2 (en) | 2002-12-17 |
WO2001056443A1 (en) | 2001-08-09 |
US20020033099A1 (en) | 2002-03-21 |
EP1253845A1 (en) | 2002-11-06 |
US6378602B2 (en) | 2002-04-30 |
AU2001230930A1 (en) | 2001-08-14 |
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