Abstract:
Multiple, programmable appliance units are connected to a control unit which receives program data from a control panel including user input elements for selecting various operational parameters, such as operational modes and times, for the appliance units. The control panel also includes a display having both display zones which are dedicated to the individual appliance units and at least one common display zone. Preferably, the common display zone is centrally located and operates on priority and override bases to provide user information concerning the appliance units. In further accordance with the invention, the information provided in the common display zone is linked to a dedicated area for a corresponding one of the appliance units to clearly enable the user to relate the provided information with the respective unit. In a preferred form of the invention, the information link takes the form of a bracket provided on the display which extends across the common display zone and into a dedicated zone for the particular appliance unit.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention pertains to the art of appliances and, more particularly, to a system used to control the programming and display for multiple appliance units. 
     2. Discussion of the Prior Art 
     Many appliances available in the marketplace today incorporate electronic controls. A typical electronically controlled appliance unit will be provided with a dedicated control system and, where applicable, a dedicated display. For one reason or another, certain appliance units are sometimes combined such as, for example, dual cooking ovens in the form of upper and lower wall ovens. Such an oven arrangement not only provides a user with an increased volume in which food items can be cooked, but advantageously enables the user to simultaneously perform distinct cooking operations. In addition, household ranges have now been introduced into the marketplace which incorporate upper and lower ovens in addition to conventional surface heating elements. 
     In conventional dual oven wall units, separate controls and displays are provided to enable the ovens to be used and controlled individually, as well as simultaneously. Typically, identical control and display panels are provided for the upper and lower ovens respectively, with the associated control systems functioning completely independently of one another. More modern systems generally utilize alpha-numeric displays to convey to the user programming times and the like. In any case, separate displays are provided so that the user is provided information dedicated to a particular oven. 
     Providing separate control and display systems can considerably add to the cost of the overall appliance. In addition, it is often the case that both ovens are not needed simultaneously. A majority of the time, only one of the ovens is, in fact, going to be utilized. For at least these reasons of cost and frequency of use, it is considered that providing two separate and distinct control and display systems is not efficient. This is also true in other types of combined appliance units. However, the possibility of utilizing a single control and display system for multiple appliance units can raise some further concerns, such as how information is clearly conveyed to the user regarding which unit is being controlled or, if both units are being utilized, how the units are separately programmed. 
     Based on the above, there exists a need in the art of appliances for a control system that can be efficiently and effectively used to program and display operational information for multiple appliance units utilizing a common control and display unit. 
     SUMMARY OF THE INVENTION 
     In accordance with the present invention, multiple appliance units are provided with a common program control and display system. In a preferred form of the invention, the program control and display system is utilized in connection with upper and lower ovens incorporated in a range which also includes various surface heating elements, with the system including a control unit programmed with priority and over-ride features for enhancing the operation of the range. In accordance with the invention, a control panel is provided with an alpha-numeric display having certain zones dedicated to convey information concerning the operation of a respective one of the ovens, as well as at least one common display zone used to convey information concerning either of the ovens. In order that the user can be certain which oven the common display zone refers to, an information link is incorporated as part of the display. In accordance with a preferred embodiment of the invention, the information link takes the form of a display bracket extending from a dedicated display zone to the common display zone in order to indicate that the information presented in the common display zone reflects an operational feature or the like about the oven associated with the dedicated zone. 
     In addition to providing an enhanced display arrangement, the control system of the present invention is designed to ease the inputting of programming information by a user, as well as to convey status information to the user. Preferably, these programming features work in conjunction with the information link to establish a desired operational mode for either or both of the ovens. For instance, if the information link is associated with the upper oven which is operating in a baking mode, the user can readily alter the bake time or temperature without requiring the activation of a dedicated bake establishing control element. On the other hand, if the information link is associated with the upper oven and changes are desired to the operation of the lower oven, the information link can be shifted to reflect that any engaged time or temperature controls will affect the lower oven. In the most preferred embodiment of the invention, one of the ovens, such as the upper oven, is established as a higher priority oven such that the information link will default to a position associated with this oven after the programming operation is complete. Furthermore, system fault messages are also given priority. 
     Additional objects, features and advantages of the invention will become more readily apparent from the following detailed description of a preferred embodiment of the invention, when taken in conjunction with the drawings wherein like reference numerals refer to corresponding parts in the several views. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of an electric range incorporating the program control and display system of the present invention; and 
     FIG. 2 is a generally schematic view of the program control and display system according to a preferred embodiment of the invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With initial reference to FIG. 1, the invention is illustrated for use in connection with an electric range generally indicated at  2 . In the embodiment shown, electric range  2  includes a cabinet  5  within which is arranged a first or upper oven  8  and a second or lower oven  9 . Upper and lower ovens  8  and  9  have associated doors  10  and  11  which are respectively provided with handles  12  and  13  that can be used to pivot doors  10  and  11  in order to access respective cooking chambers of ovens  8  and  9 . For the sake of completeness, this figure illustrates doors  10  and  11  with respective viewing windows  14  and  15 . 
     Cabinet  5  is also provided with an associated range top  18  which supports various spaced surface heating elements  20 - 23  in a manner known in the art. At an upper rear portion, cabinet  5  includes an upstanding portion  26  which is provided with a control panel  28 . At this point, it should be realized that the arrangement and location of control panel  28  could vary in accordance with the present invention. For example, control panel  28  could be located along an upper face panel  32  of cabinet  5 . In any event, upstanding portion  26  includes a plurality of knobs  36 - 39  for use in selectively activating and deactivating surface heating elements  20 - 23  respectively. Control panel  28  is preferably arranged between knobs  36 - 39  and is shown to include a substantially central display  44 , such as an LED, LCD or VFD display unit. Furthermore, control panel  28  is provided with a number pad generally indicated at  46  that has an associated button  48  for use in setting a clock arranged either within display  44  or in another portion of control panel  28 . 
     In more detail and particularly with reference to FIG. 2, control panel  28  of range  2  includes a first row of control buttons generally indicated at  51  which are generally used to establish an operational mode for upper oven  8 . As shown, first row  51  includes a cancel button  52 , a bake button  53 , a broil button  54 , a cleaning mode button  55 , a toasting button  56 , a warming mode establishing button  57  and a light control button  58 . In a generally similar manner, a second row of control buttons  61  are provided for lower oven  9 . In the most preferred form of the invention, second row  61  includes a cancel button  62 , a bake button  63 , a broil button  64 , a cleaning mode button  65 , a convection mode establishing button  66  and a light control button  68 . In the most preferred form of the invention, the user is able to program the operation of at least upper and lower ovens  8  and  9  through the use of the first and second rows of buttons  51  and  61 , along with numeric pad  46 , timer buttons  70  and  72 , cook time and stop time buttons  74  and  76 , and an auto set button  78 . Since this basic programming arrangement is known in the art and not considered part of the present invention, it will not be described further here in detail. Of course, as also known in the art, light buttons  58  and  68  enable a consumer to selectively activate lights (not shown) provided in upper and lower ovens  8  and  9  respectively, with the lights being usable in combination with windows  14  and  15  to view the progress of a cooking operation. 
     FIG. 2 illustrates additional details of the program control and display system of the present invention which will now be described in detail. First of all, it should be noted that display  44  is provided with numerous display zones. As will be detailed more fully below, some of these zones provide information which relates to the operation of only a particular one of ovens  8  and  9 , while at least one display zone represents a common area for displaying information for a selected one of the ovens  8  and  9 . In accordance with the invention, display  44  visually links the common area to a respective one of the dedicated areas in order to convey to the user exactly which oven  8 ,  9  the information displayed in the common area relates to. 
     More specifically, display  44  includes a first display zone  100  which is used to convey programmed timing information for upper oven  8 . Zone  100  can also be used as a clock display area, at least during non-oven use periods, as well as countdown time data established through timer button  70  independent of oven operation. Adjacent first display zone  100  is a second display zone  102  which is arranged above a third display zone  103 . Second display zone  102  preferably defines a numeric temperature display area for oven  8 , while zone  103  defines an alpha display used to convey certain operational mode information for oven  8 . Slightly offset from zones  102  and  103  is a fourth display zone  105 . In the most preferred form of the invention, zone  105  is boxed off and capable of displaying upper and/or lower generally horizontal bars which reflect the activation status of upper and/or lower heating elements (not shown) provided within upper oven  8 . Therefore, depending upon which mode button  53 - 57  is depressed, zone  105  will indicate the corresponding activation of either or both of the upper and lower heating elements for upper oven  8 . 
     Display  44  includes a fifth display zone  110  which generally functions in a manner corresponding to first display zone  100  in that zone  110  conveys programmed time information. However, zone  110  is dedicated to convey information for lower oven  9 . Adjacent zone  110  are sixth and seventh display zones  112  and  113 . Zone  112  is used to convey temperature information for lower oven  9 , such as the temperature set by a user utilizing numeric pad  46 . The selected operational mode for lower oven  9  is displayed in display zone  113 . Therefore, if lower oven  9  is to be used to bake some food product at 425° F., zone  112  would numerically display the temperature and zone  113  would display the word “BAKE”. Adjacent zones  112  and  113  is another boxed area which constitutes display zone  116 . Zone  116  is provided with upper and lower bar displaying portions for conveying information concerning the activation/deactivation of upper and lower heating elements (not shown) provided in lower oven  9  in a manner directly analogous to zone  105 . In addition, zone  116  can also display a symbol indicative of the activation of a convection fan (not shown) for lower oven  9  upon depression of mode button  66 . In any event, zone  116  is dedicated to displaying information relating to lower oven  9 . 
     At this point, it should be noted that the number, form, content and particular arrangement of the various zones of display  44  can greatly vary in accordance with the invention such that the drawings and above description merely set forth the most preferred arrangement. Due to the construction of display  44  in accordance with the most preferred form of the invention, zones  103  and  113  only provide dedicated information concerning selected operational modes for upper oven  8  and lower oven  9  respectively. Most preferably, zones  103  and  113  are limited to displaying “BAKE” and “BROIL” operational modes for the upper and lower ovens  8  and  9 . In order to be able to convey additional alpha information, display  44  includes a common, central zone  125  that is used to display operational information for each of upper and lower ovens  8  and  9 . As will be detailed more fully below, common zone  125  preferably has an associated default, in accordance with the preferred embodiment, which results in the displaying of information concerning the current operational mode for upper oven  8 . 
     Selections inputted by the user of range  2  through control panel  28  are relayed to a central processing unit (CPU)  170 . CPU  170  also receives other signals, such as signals indicative of the temperatures in upper and lower ovens  8  and  9  from sensors  175  and door opening/closing status signals from switches  176  associated with both oven doors  10  and  11 . Based on the signals received, CPU  170  outputs control signals to heating elements associated with upper and lower ovens  8  and  9  as indicated at 178, lights for ovens  8  and  9  as indicated at 180, a convection fan as indicated at 182, door locks as indicated at 184 and to display  44 . In general, the invention is concerned with providing and controlling the display in common zone  125  and the manner in which the information displayed in common zone  125  is linked to a particular one of ovens  8 ,  9  as will be detailed below. 
     As shown, common display zone  125  is preferably located between dedicated zones  100  and  110 . Due to this location and the use of zone  125  to display alpha information for both upper and lower ovens  8  and  9 , display  44  also incorporates structure used to link information in common display zone  125  with display information for a respective one of the upper and lower ovens  8  and  9 . In accordance with the most preferred form of the invention, an information link in the form of a display bracket  190  is provided. In FIG. 2, common zone  125  illustrates that a “TOASTING” operation has been selected and bracket  190  extends from first display zone  100  to common zone  125  thereby linking the display information in common zone  125  to upper oven  8 . Of course, a corresponding bracket arrangement would be used to link common zone  125  to dedicated display zone  110  when the information provided in common zone  125  relates to the operation of oven  9  as indicated by the dotted lines in this figure. 
     Common zone  125  is actually used to display numerous messages to a user of range  2 , with the displayed information being presented on a predetermined priority basis. That is, an array of words and phrases that are displayed in a priority viewing basis, based on ease of use and convenience, is available for common zone  125 . Range  2  allows multiple cooking functions and timed features to be active simultaneously with the highest priority alpha message being displayed in common zone  125 . In accordance with the most preferred embodiment, there are three primary priority displays, at least one override message and appliance fault indications. To indicate the operation of upper oven  8 , common zone  125  can display “TOASTING” and “KEEP WARM” messages. For lower oven  9 , “CONVECTION” is available for display. In addition, common operational messages of “CLEANING”, “CLEANED” and “PRE-HEAT” are available. 
     In the example shown, the alpha display zone  125  indicates that a “TOASTING” mode has been selected. Information link bracket  190  indicates that the toasting operation is associated with the upper oven. This alpha display would be maintained for the entire operation unless the user alters the cooking functions. If additional time is desired for the already established mode of operation, numeric pad can be directly accessed and, utilizing the toasting operation shown in FIG. 2 as an example, the toast time could be changed directly without having to further press mode button  56 . If it is desired to adjust the operation of lower oven  9 , the suitable mode button  63 ,  64  or  66  would be depressed, the bracket  190  would extend across the common area  125  and dedicated zone  110  (see lower bracket shown in dotted lines in FIG. 2) and the other controls could be directly utilized to select the desired cook time and operation. After the programming is completed, bracket  190  would again return to the higher priority state associated with upper oven  8 . After the toast time expires, the word “TOASTING” would be changed to “COMPLETE”, preferably followed by a user selectable set of reminder beeps. The word “COMPLETE” would be removed from common display zone  125  and the beeps would terminate simply by opening of the oven door  10  as sensed by switch  176 . Therefore, “TOASTING”, “KEEP WARM” and “CONVECTION” represent priority displays, “COMPLETE” is an override display and appliance faults indications such as sensor errors, door open conditions and the like also take priority over programmed information. 
     Of course, the particular information that can be displayed in common zone  125  could vary in accordance with the present invention, particularly when the invention is applied to different types of appliances. In general, the invention is concerned with providing common display zone  125 , the manner in which alpha messages are provided in zone  125  and the ability to link the information in common display zone  125  to one of the upper and lower ovens  8  and  9 . Again, this linking arrangement is performed through the use of bracket  190  in accordance with the most preferred embodiment of the invention. Regardless, the provision of the common display zone  125  not only reduces the cost of the overall display  44  but conveniently provides a common display area to which a user can consistently direct his/her attention during programming of the appliance through control panel  28  and when updating or receiving status information concerning the operation of the overall appliance. 
     Although described with respect to the preferred embodiment of the invention, it should be readily understood that various changes and/or modifications can be made to the invention without departing from the spirit thereof. For example, although the invention has been described with respect to range  2 , the invention also has applicability to other types of appliance units including gas ranges, wall ovens, fresh food and freezer controls for a refrigerator, combination clothes washers/dryers and the like. Certainly, other types of information links could be utilized, without departing from the invention. In general, the invention is only intended to be limited by the scope of the following claims.