Abstract:
A universal food holding cabinet for keeping precooked food warm. The food holding cabinet includes a plurality of row assemblies that each includes first and second spaced apart heater plates to form a food holding cavity. A bezel extends across an edge of the upper heating plate of a row assembly and an edge of the lower heating plate of an adjacent row assembly. The bezel includes an air duct for cooling components associated with displays carried by the bezel. The bezel is fastened to the upper heater plate and the lower heating plate with an interlock that helps to mitigate oil migration among the row assemblies.

Description:
RELATED APPLICATION 
       [0001]    This application is related to U.S. patent application Ser. No. ______ (Attorney Docket No. 315.8969USU) of Michael Andrew Theodos, Steven Matthew Takata, and Charles D. Grant, which is assigned to the assignee of this application and is filed on the same date as this application. 
     
    
     FIELD OF THE DISCLOSURE 
       [0002]    This disclosure relates to a food holding cabinet that has a high density of food warming cavities with no appreciable increase in cabinet size. 
       BACKGROUND OF THE DISCLOSURE 
       [0003]    Food holding cabinets are used to maintain optimal cooked food product temperatures until served. Individual trays are loaded into shelf like assemblies within the cabinet with heating plates. Cooks within a restaurant typically cook food in small batches likely beyond the immediate need of the product. This excess food is placed in a tray within a holding cabinet shelf that is used to maintain the temperature of that food product until served. 
         [0004]    Known food holding cabinets provide a limited number of shelves within a given volume or footprint. There is a demand for more shelves, which has been satisfied with additional food holding cabinets that take up additional space in the kitchen or food preparation area of the restaurant. 
         [0005]    Known food holding cabinets generally have inner panel sides that require assembly of multiple panel portions. For example, one known cabinet requires assembly of three pieces per side panel. This results in a need to purchase costly multiple panel portions and requires considerable assembly time. 
         [0006]    Known food holding cabinets have been plagued by oil and/or grease migration into areas that affect heater elements, circuit boards, display components and buttons. 
         [0007]    Thus, there is a need for a food holding cabinet that provides improvements that address the aforementioned disadvantages of known food holding cabinets. 
       SUMMARY OF THE DISCLOSURE 
       [0008]    A food holding cabinet of the present disclosure for keeping pre-cooked food warm comprises a support structure that supports a plurality of row assemblies. Each of the row assemblies comprises a first heater assembly spaced from a second heater assembly to form a food holding cavity. A bezel covers an edge of the first heater assembly of a first one of the row assemblies and the second heater assembly of a second one of the row assemblies. 
         [0009]    In another embodiment of the food holding cabinet of the present disclosure, each of the row assemblies further comprises a layer of insulation that surrounds the first and second heater assemblies, thereby inhibiting heat transfer between the first and second heater assemblies of adjacent ones of the row assemblies. 
         [0010]    In another embodiment of the food holding cabinet of the present disclosure, the bezel is a first bezel. A second bezel covers an edge of the first heater assembly of the second row assembly and the second heater assembly of a third one of the row assemblies. 
         [0011]    In another embodiment of the food holding cabinet of the present disclosure, the bezel is formed with a material selected from the group consisting of: plastic, metal and a combination thereof. 
         [0012]    In another embodiment of the food holding cabinet of the present disclosure, the bezel is formed of plastic, and further comprises one or more buttons that are heat staked in the bezel so that loading from manual operation of the buttons is distributed along the bezel. 
         [0013]    In another embodiment of the food holding cabinet of the present disclosure, the bezel is connected by an interlock to the first heater assembly of the first row assembly and the second heater assembly of the second row assembly. The interlock provides a seal that mitigates oil migration. 
         [0014]    In another embodiment of the food holding cabinet of the present disclosure, each of the first and second heater assemblies comprises a heater disposed on a heater plate. The bezel is fastened by the interlock to an edge of the first heater plate of the first heater assembly of a first one of the row assemblies and to an edge of the second heater plate of the second heater assembly of a second one of the row assemblies. 
         [0015]    In another embodiment of the food holding cabinet of the present disclosure, the interlock comprises first and second portions of the bezel that mate with a corresponding first portion of the first heater plate of the first heater assembly of the first row assembly and to a corresponding first portion of the second heater plate of the second heater assembly of the second row assembly, respectively. 
         [0016]    In another embodiment of the food holding cabinet of the present disclosure, a cooling system comprises a plurality of fans that draw in air via at least one entry port and a duct system that guides the air in a path that includes each of the row assemblies and at least one exit port. The duct system further guides the air from first and second ones of the row assemblies to first and second ones of the first fans, respectively. 
         [0017]    In another embodiment of the food holding cabinet of the present disclosure, the bezel is a first bezel. A second bezel is provided and covers an edge of the first heater assembly of the second row assembly and the second heater assembly of a third one of the row assemblies. Separate channels are disposed behind the first and second bezels through which the air flows to cool at least one component disposed in the channels. 
         [0018]    In another embodiment of the food holding cabinet of the present disclosure, the duct system comprises a first duct and a second duct that are in fluid communication with the first and second row assemblies, respectively, for flow of air drawn by the first and second fans, respectively. 
         [0019]    In another embodiment of the food holding cabinet of the present disclosure, the duct system is structured for the second fan to draw air from the first row assembly in the event of failure of the first fan. 
         [0020]    In another embodiment of the food holding cabinet of the present disclosure, at least the first duct comprises an opening through which the second fan draws air from the first row assembly in the event of failure of the first fan. 
         [0021]    In another embodiment of the food holding cabinet of the present disclosure, a third one of the fans that also draws air from the first row assembly, and wherein the first and third fans are in fluid communication with opposite edges of the first row assembly, respectively. 
         [0022]    In another embodiment of the food holding cabinet of the present disclosure, the support structure comprises first and second unitary side panels that support the row assemblies. 
         [0023]    In another embodiment of the food holding cabinet of the present disclosure, the first unitary side panel carries a duct structure that guides cooling air to a plurality of fans. 
         [0024]    In another embodiment of the food holding cabinet of the present disclosure, the duct structure comprises one or more baffles that provide separate paths for airflow from different ones of the row assemblies or from opposite edges of one of the row assemblies drawn by the plurality of fans. 
         [0025]    A method of the present disclosure assembles a food holding cabinet and comprises steps of: 
         [0026]    assembling a plurality of row assemblies, wherein each of the row assemblies comprises a first heater assembly spaced from a second heater assembly to form a food holding cavity; 
         [0027]    fastening first and second unitary side panels to opposite edge portions of a base; and 
         [0028]    fastening the plurality of row assemblies to the first and second unitary side panels. 
         [0029]    In another embodiment of the assembling method of the present disclosure, a further step comprises fastening a plurality of bezels to the row assemblies. At least one of the bezels covers an edge of the first heater assembly of a first one of the row assemblies and the second heater assembly of a second one of the row assemblies. 
         [0030]    In another embodiment of the assembling method of the present disclosure, each of the bezels is attached to the edges of the first and second heater assemblies with an interlock. The interlock provides a seal that mitigates oil migration. In one aspect, the bezels are attached to the edges with the interlock by a snap in action. 
         [0031]    In another embodiment of the assembling method of the present disclosure, a further step comprises disposing on the first unitary side panel a duct structure that guides cooling air to a plurality of fans. 
         [0032]    In another embodiment of the assembling method of the present disclosure, the duct structure comprises one or more baffles that provide separate paths for airflow from different ones of the row assemblies or from opposite edges of one of the row assemblies drawn by the plurality of fans. 
         [0033]    Another method of the present disclosure that cools components of a food holding cabinet comprises: 
         [0034]    drawing cooling air with a plurality of fans through a plurality of row assemblies of the food holding cabinet, wherein each of the row assemblies comprises at least one of the components, which is exposed to the cooling air; and 
         [0035]    guiding the cooling air between the row assemblies and the fans via a plurality of separate paths. 
         [0036]    In another embodiment of the cooling method of the present disclosure, a further step comprises providing one or more baffles to form the separate paths. 
         [0037]    In another embodiment of the cooling method of the present disclosure, a first fan and a second fan of the plurality of fans draws the cooling air from at least a first one and a second one of the row assemblies via first and second ones of the separate paths, respectively. One of the baffles has an opening through which the first fan draws air from the second row assembly should the second fan fail. 
         [0038]    The food holding cabinet of the present disclosure holds food for extended periods until it is ready to be served while keeping its quality high. The food holding cabinet has intelligence capability to keep up with which trays were put in first so that they would be used first. This is otherwise known as First-In-First-Out (FIFO). The food holding cabinet miniaturizes the row displays and circuit boards, thereby minimizing heat loss to improve efficiency, increasing holding capacity by 50% while keeping the footprint the same size. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0039]    Other and further objects, advantages and features of the present invention will be understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference characters denote like elements of structure and: 
           [0040]      FIG. 1  is a front view of a known food holding cabinet; 
           [0041]      FIG. 2  is a perspective view of a row assembly of the food holding cabinet of  FIG. 1 ; 
           [0042]      FIG. 3  is a front view of a food holding cabinet of the present disclosure; 
           [0043]      FIG. 4  is a front view of the food holding cabinet of  FIG. 3  with bezels and front panel removed; 
           [0044]      FIG. 5  is a perspective view of a row assembly of the food holding cabinet of  FIG. 3 ; 
           [0045]      FIG. 6  is a perspective view of the row assembly of  FIG. 5  with bezels removed; 
           [0046]      FIG. 7  is a cross-sectional view taken along line  7  of  FIG. 3 ; 
           [0047]      FIG. 8  is a front perspective view of a bezel of the food holding cabinet of  FIG. 3 ; 
           [0048]      FIG. 9  is a back perspective view of the bezel of  FIG. 8 ; 
           [0049]      FIG. 10  is an elevation view of the left inner side panel of the food holding cabinet of  FIG. 3 ; 
           [0050]      FIG. 11  is an elevation view of the right inner side panel of the food holding cabinet of  FIG. 3 ; 
           [0051]      FIG. 12  is a perspective view of the base and inner side panels of the food holding cabinet of  FIG. 3 ; 
           [0052]      FIG. 13  is a front view of the food holding cabinet of  FIG. 3  depicting the cooling airflow through the food holding cabinet; and 
           [0053]      FIG. 14  is a perspective view of the food holding cabinet of  FIG. 3  with the outer and inner side panels removed from the right side. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0054]    Referring to  FIGS. 1 and 2 , a known food holding cabinet  20  comprises a base  22 , a left side  24 , a right side  26  and a top  28 . A plurality of row assemblies  30 ,  32 ,  34  and  36  are supported by left side  26  and right side  28 . Each row assembly, e.g., row assembly  30 , comprises a heater  59 , a bottom  42  and a bezel  44 . Heater  59  comprises a vulcanized heater  60  disposed on a surface of a heater plate  40  and bottom  42  are supported by a pair of side rails  46  and  48  to form a gap  50  in which a food tray may be inserted. Bezel  44  is shaped to provide display panels  52 ,  54  and  56  disposed along an edge of heater plate  40  and to provide an opening  58  through which food trays may be inserted. Vulcanized heater  60  carries a temperature sensor  62 . The spacing between the heater plates  40  of the row assemblies is such that very little heat is transferred between adjacent rows (e.g., from row  30  to row  32 ). This permits heater plate  40  of each row to be independently controlled with different temperature set points for the respective food trays with negligible effect from heater plate  40  of an adjacent row. 
         [0055]    Referring to  FIGS. 3-6 , a food holding cabinet  70  of the present disclosure comprises a base  72 , a first outer side panel  74 , a second outer side panel  76  and an outer top panel  78 . A first inner side panel  80  and a second inner side panel  82  are spaced from first outer side panel  74  and second outer side panel  76  by gaps  88  and  90 , respectively (shown in  FIG. 4 ). Outer top panel  78  is spaced from an inner top panel  84  by a gap  86 . A user interface  92 , a time query button  64  and a temperature query button  66  are disposed on a front panel  94  (shown in  FIG. 3 ). An electrical cord  71  plugs into an outlet  73  that provides alternating current (AC) power from an AC source (not shown) via an ON/OFF switch  75  to a power module (not shown) that distributes operating power to various electrically operated components of food holding cabinet  70  that require AC power. The power module includes an AC to DC (direct current) converter (not shown) to provide DC power to those components that require DC operating power. 
         [0056]    Referring also to  FIG. 7 , a plurality of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110  are supported by first inner side panel  80  and second inner side panel  82 . Each row assembly, e.g., row assembly  102 , comprises an upper heater assembly  111  and a lower heater assembly  113  (shown in  FIG. 7 ). Upper heater assembly  111  and lower heater assembly  113  comprise an upper heater plate  112  and a lower heater plate  114 , respectively. Upper heater plate  112  and lower heater plate  114  are supported by a pair of spacer side rails  116  and  118 . Spacer side rails  116  and  118  are attached to upper heater plate  112  by any suitable fastener, for example set screws  302  (shown in  FIG. 5 ) and to lower heater plate  114  by similar set screws (not shown). Spacer side rails  116  and  118  are also attached to first and second inner side panels  80  and  82  by screws  306  (×2 on each side) in top and bottom of spacer side rails  116  and  118  as shown in  FIGS. 9 and 10 . Spacer side rails  116  and  118  each include an upper slot  120  and a lower slot  122  that extend from front to back. Opposite side edges of upper heating plate  112  fit into upper slots  120  of spacer side rails  116  and  118  (shown in  FIG. 6 ). Opposite side edges of lower heating plate  114  fit into lower slots  122  of spacer side rails  116  and  118  (shown in  FIG. 6 ). As shown in  FIG. 4 , inner top panel  84  is spaced by a gap  96  from a panel  95 , which is spaced by a gap  98  from top heater in row  100 . 
         [0057]    Upper heater assembly further comprises a heater  124 , e.g., a vulcanized heater, although other types of heaters may be used. Heater  124  is disposed on the upper surface of heater plate  112  and carries a temperature sensor  126 . Lower heater assembly  113  further comprises a similar vulcanized heater (not shown) that is disposed on the lower surface of lower heater plate  114  and that carries a temperature sensor (not shown). Upper and lower slots  120  and  122  are spaced to provide a gap or cavity  128  to permit the insertion of a food tray for holding. Upper and lower heater plates  112  and  114  may be any suitable material that transfers heat from the vulcanized heaters  124  to cavity  128 . For example, upper and lower heater plates  112  and  114  may be formed of a metal, for example, aluminum, stainless steel, or other metals. 
         [0058]    A thermal insulation layer  130  is wrapped around row assembly  102  and spacer side rails  116  and  118 . Insulation layer  130  lowers any heat transfer from upper heater plate  112  of row assembly  102  to row assembly  100  and from lower heater plate  114  of row assembly  102  to row assembly  104 . A similar insulation layer  130  of row assemblies  100  and  104  further limits heat transfer from adjacent row assemblies  100  and  104  to row assembly  102 . Row assemblies  106 ,  108  and  110  are similarly wrapped with an insulation layer  130  to limit heat transfer to and from adjacent row assemblies. 
         [0059]    Referring to  FIGS. 3 ,  5 ,  7  and  8 , a bezel  132  and a bezel  133  are provided for each row assembly. Bezel  132  for row assembly  102  covers a front edge of upper heater plate  112  of row assembly  102  and a front edge of lower heater plate  114  of row assembly  100  as shown in  FIG. 7 . Bezel  132  for row assembly  104  covers a front edge of upper heater plate  112  of row assembly  104  and a front edge of lower heater plate  114  of row assembly  102  and so on for row assemblies  106 ,  108  and  110 . Bezel  132  for row assembly  100  covers only a front edge of the upper heater assembly  112  of row assembly  100  as row assembly  100  is the topmost row assembly. Bezel  133  covers a back edge of upper heater plate  112  of row assembly  102  and, though not shown in the drawing, covers a front edge of lower heater plate  114  of row assembly  100 . Bezel  133  is otherwise identical to bezel  132 . A bezel  133  is similarly provided for each of the other row assemblies. Bezels  132  and  133  are attached to inner side panels  80  and  82  and to the row assemblies by a suitable fastener, for example, screws  308  shown in  FIGS. 9 and 10 . 
         [0060]    Referring to  FIGS. 7 and 8 , bezel  132  comprises an elongated C-shaped body that has a display face  134  (shown in  FIG. 8 ) and a pair of legs  136  and  138 . Legs  136  and  138  have one or more portions or hooks  140  at their respective terminal ends. Legs  136  and  138  and hooks  140  are dimensioned so that hooks  140  fit snugly into mating portions or slots  142  of lower heater plate  114  of row assembly  100  and upper heater plate  112  of row assembly  102  with a snap-in action. This provides an interlock that minimizes unsealed interfaces or provides a seal to heater plates  112  and  114 , thereby mitigating oil and/or grease migration. 
         [0061]    Referring to  FIGS. 5 and 8 , display face  134  comprises displays  144 ,  146  and  148  and buttons  150 ,  152  and  154 . Displays  144 ,  146  and  148  display information concerning food items placed in corresponding locations on lower heating plate  114  of a corresponding row assembly. Buttons  150 ,  152  and  154  are manually operable to activate and deactivate the timers that control food hold time. Buttons  150 ,  152  and  154  also play a role in manual programming. 
         [0062]    Bezel  132  also comprises side legs  164 . Each side leg  164  includes an open portion  166  and a notch  168 . Notch  168  provides a loose fit that allows bolt  306  to stay in place to hold the row assembly up while bezel  132  is removed. Bezel  132  also provides a duct  160  for cooling air to flow and cool a component, for example, components disposed on a display control board  162  (shown in  FIGS. 7 and 9 ) for displays  144 ,  146  and  148 . 
         [0063]    Bezels  132  and  133  are formed of a suitable material, for example, plastic or metal. Preferably, bezels  132  and  133  are composed of a plastic part and a molded in graphic overlay, which has a thermal conductivity lower than metal, although metallic bezels may be used in some embodiments. Buttons  150 ,  152  and  154  are attached to bezel  132  or  133  by any suitable fasteners, but are preferably heat staked in plastic bezels  132  and  133 . 
         [0064]    Referring to  FIG. 9 , buttons  150 ,  152  and  154  of bezel  132  are shown heat staked to separate boards  151 ,  153  and  155 , which each contain four apertures  156  that are located near the corners of each board (the apertures in the upper left hand corners being obscured in  FIG. 9 ). Bezel  132  includes for each board  150 ,  152  and  154  four plastic posts  158  located to be in registry with and to mate with apertures  156  when assembled. The upper posts for each board  151 ,  153  and  155  are obscured in  FIG. 9 . Heat staking is accomplished with a heating iron adjacent posts  158  while resident in their respective apertures  156  to form heat staked joints. This arrangement gives strong support to buttons  150 ,  152  and  154  and distributes force, which is applied manually by an operator to any of buttons  150 ,  152  and  154 , along bezel  132 . This is distinguished from known cabinets in which the buttons were mounted to one or more circuit boards for the row displays. These circuit boards were made thick and required strong metallic support to handle the force distribution. The arrangement of  FIG. 9  allows display control board  162  to be about 50% smaller than display control boards of the known food holding cabinet of  FIG. 1 . Heat staked buttons  150 ,  152  and  154  also help to seal the row assemblies for oil migration should the overlay fail around a button. Bezels  132  and  133  in an alternate embodiment may have an adhesive backed overlay instead of a molded in overlay. Display board  162  carries displays  144 ,  146  and  148  and fastens to bezel  132  by a snap action to molded tabs  159  disposed on bezel  132 . 
         [0065]    Referring to  FIGS. 10-12 , first inner side panel  80  and second inner side panel  82  and base  72  comprise a three-piece assembly vis-à-vis a larger number of pieces for the known food holding cabinet of  FIG. 1 . First inner side panel  80  comprises a vertical sheet  180  that has flanges  182  and  184  at opposite horizontal edges and flanges  186  and  188  at opposite vertical edges. Second inner side panel  82  comprises a vertical sheet  220  that has flanges  222  and  224  at opposite horizontal edges and flanges  226  and  228  at opposite vertical edges. To assemble the three pieces, first and second inner side panels  80  and  82  are fastened to base  72  with screws or bolts. For example, screws  229  fasten flange  182  of first inner side panel  80  to base  72 . Similar screws (not shown) fasten flange  222  of second inner side panel  82  to base  72 . Vertical sheets  180  and  220  are preferably formed of plastic or metal, e.g., stainless steel. Strength improvement and some cost savings are achieved by making inner side panels  80  and  82  integral with corner flanges  186 ,  188 ,  226  and  228 . 
         [0066]    Referring to  FIG. 10 , a component board  190  and a component board  192  are disposed on vertical sheet  180 . Each component board, for example, comprises components that control the power supplied to the heater plates of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110 . Vertical sheet  180  comprises a plurality of ports  194 ,  196 ,  198 ,  200 ,  202  and  204  that are disposed adjacent flange  186  and that are positioned to interface with a first end of ducts  160  of bezels  132  of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110 , respectively. Vertical sheet  180  comprises a plurality of ports  206 ,  208 ,  210 ,  212 ,  214  and  216  that are disposed adjacent flange  188  and that are positioned to interface with one end of ducts  160  of bezels  132  of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110 , respectively. Vertical sheet  180  also comprises a port  218  and a port  219  adjacent horizontal flange  184 . 
         [0067]    Referring to  FIG. 11 , vertical sheet  220  comprises a plurality of ports  230 ,  232 ,  234 ,  236 ,  238  and  240  that are disposed adjacent flange  228  and that are positioned to interface with second end of ducts  160  of bezels  133  of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110 , respectively. Vertical sheet  220  comprises a plurality of ports  242 ,  244 ,  246 ,  248 ,  250  and  252  that are disposed adjacent flange  226  and that are positioned to interface with a second end of ducts  160  of bezels  132  of row assemblies  100 ,  102 ,  104 ,  106 ,  108  and  110 , respectively. Vertical sheet  220  also comprises a port  254 , a port  256  and a port  258 . Vertical sheet  220  further comprises baffles  260 ,  262 ,  264  and  266  that are disposed to provide a plurality of paths  270 ,  272  and  274 . Path  270  guides airflow from ports  230 ,  232 ,  234  and  236  to port  254 . Path  272  guides airflow from ports  242 ,  244 ,  246  and  248  to port  256 . Path  274  guides airflow from ports  238 ,  240 ,  250  and  252  to port  258 . 
         [0068]    Referring to  FIGS. 4 and 13 , air enters food holding cabinet  70  through an intake port  280  near the lower edge of first outer panel  74  (shown in  FIG. 13 ) and flows in the pattern depicted by arrows and exits food holding cabinet through exit ports  282  and  284  located in outer top panel  78 . The air flows in a gap  88  between first outer side panel  74  and first inner side panel  80  as depicted by the arrow. Gap  88  is closed by vertical flanges  186  and  188  and horizontal flange  184  ( FIGS. 10 and 12 ). The airflow cools component boards  190  and  192  disposed on sheet  180  ( FIG. 10 ). The airflow exits gap  88  through ports  194 ,  196 ,  198 ,  200 ,  202  and  204  to channels or ducts  160  of bezels  132  and through ports  206 ,  208 ,  210 ,  212 ,  214  and  216  to channels or ducts  133  of bezels  133 . The airflow in ducts  160  cools display component board  162  associated with displays  144 ,  146  and  148 . 
         [0069]    The airflow exits ducts  160  through ports  230 ,  232 ,  234 ,  236 ,  238 ,  240 ,  242 ,  244 ,  246 ,  248 ,  250  and  252  of second inner side panel  82  ( FIG. 11 ) and enters a gap  90  between second inner panel  82  and second outer panel  76  ( FIG. 4 ). Gap  90  is closed by vertical flanges  226  and  228  and horizontal flange  224  ( FIGS. 11 and 12 ). Referring also to  FIG. 11 , the airflow in gap  90  is divided into paths  270 ,  272  and  274  by baffles  262 ,  264  and  266 . Thus, air entering via ports  230 ,  232 ,  234  and  236  flows in path  270  and exits through port  254 . Air entering through ports  242 ,  244 ,  246  and  248  flows in path  272  and exits through port  256 . Air entering through ports  238 ,  240 ,  250  and  252  flows in path  274  and exits through port  258 . 
         [0070]    Referring to  FIG. 14 , airflow exiting gap  90  through ports  254 ,  256  and  258  enters a plenum  290 , a plenum  292  and a plenum  294 , respectively, which are disposed in gap  96  ( FIG. 4 ). Airflow in plenums  290  and  292  provides cooling of components associated with user interface  92 , timer display  64  and temperature display  66  and located behind front panel  94 . The airflow in plenums  290  and  292  is drawn by fans or blowers  296  and  298 , respectively and expelled into gap  86 . The airflow in plenum  294  is drawn by a fan  300  and expelled into gap  86 . The airflow exits through exit ports  282  and  284  of outer top panel  78 . Airflow in gap  88  also exits via ports  218  and  219  ( FIG. 10 ) to gap  96  and is drawn by fans  296  and  298 . 
         [0071]    The duct system of the present disclosure includes the ducts  160  ( FIG. 7 ) of row assemblies  100 ,  102 ,  140 ,  106 ,  108  and  110 , gaps  86 , 88  and  98  ( FIGS. 4 and 12 ), paths  270 ,  272  and  274  ( FIG. 11 ), intake port  280 , exit ports  282  and  284  ( FIG. 13 ) and fans  296 ,  298  and  300  ( FIG. 14 ). Baffles  264  and  266  are dimensioned to leave an opening or a gap  268  (shown in  FIG. 4 ) between second outer side panel  76  and baffles  264  and  266 . Should one or more of fans  296 ,  298  or  300  fail, the remaining fan or fans will draw air via gap  268  to maintain a cooling air flow in the row assemblies. 
         [0072]    The present disclosure 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 disclosure as defined in the appended claims.