Method and apparatus for controlling cooking cycles in a cooking system

• US 4,636,949 A
• Filed: 03/07/1984
• Issued: 01/13/1987
• Est. Priority Date: 03/07/1984
• Status: Expired due to Fees

• Current Assignee: Potter & Brumfield Incorporated
• Original Assignee: AMFM Incorporated
• Inventors: Longabaugh, Charles R.
• Primary Examiner(s): Smith, Jerry
• Assistant Examiner(s): Lastova, John R.
• Application Number:
  US06/587,004
• Time in Patent Office: 1,042 Days
• Field of Search: 364/143-146, 364/400, 364/192, 364/477, 364/557, 364/154, 364/184, 364/185, 99/325-328, 99/332, 219/10.55 B, 219/10.55 E, 219/442, 219/490, 219/492, 219/494
• US Class Current: 700/90
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 19/0428 Safety, monitoring G05B19/0423 takes precedence
• CPC Class Codes: G05B 2219/24069 Diagnostic
• CPC Class Codes: G05B 2219/25381 Restart program at predetermined position, crash recovery after power loss
• CPC Class Codes: G05D 23/1917 using digital means

Abstract

Method and apparatus for controlling the operation of a commercial deep-fryer cooker as used in preparing fried chicken or other food products. The controller (11), according to the invention, has been designed to control essentially all aspects of the cooking process and includes a number of features which enhance the flexibility of the system, allow it to be operated with greater efficiency and provide increased safeguards against accident or machine malfunction.

Among the features provided by the invention is the capability of lengthening or shortening or changing the ending temperature of a cooking cycle without changing the overall cooking cycle. This permits fast changes to be made in a cooking cycle, even while it is in progress.

The system also provides protection against a power failure by saving essential data relating to an interrupted cooking cycle so that the cycle can be resumed if the power is restored within a prescribed period of time.

The system also provides for more efficient heat regulation, provides safeguards when cooking under pressure to significantly reduce the risk of accident, provides means for preventing cooking cycle programs from being entered improperly, and includes a variety of built-in diagnostic capabilities to ensure everything is working properly and to notify the operator of a malfunction.

Claims

1. A cooking system including cooking means for cooking a food product and control means for controlling the cooking of said food product by said cooking means, said control means including means for cooking said food product pursuant to a particular cooking cycle, said cooking cycle being defined by a plurality of time/temperature setpoints each of which specify that the cooking temperature be at a particular value at a particular time during the cooking cycle, characterized in that said control means (201) further includes means for inserting an alternate time/temperature set point into said cooking cycle for replacing the setpoints in said cooking cycle which have a time or a temperature value that is greater than that of said alternate setpoint.

2. A cooking system as recited in claim 1 wherein said plurality of time/temperature setpoints comprise from two to seven setpoints.

3. A cooking system as recited in claim 1 wherein said cooking means comprises a deep-fryer cooker and wherein the temperature settings of said plurality of time/temperature set points define the temperature of the cooking oil (9) within which said food product is cooked.

4. A cooking system as recited in claim 3 wherein said system cooking means and control means are adapted for a food product comprising fried chicken.

5. A cooking system as recited in claim 1 and further including means for preventing the loss of data defining a particular cooking cycle in progress in the event of a loss of power interrupting said cooking cycle, said preventing means comprising data storage means (201), means for transferring said data to said data storage means, and standby energy storage means (238) for supplying energy to said data storage means.

6. A cooking system as recited in claim 5 wherein said data storage means (201) comprises volatile data storage means, and wherein said energy storage means (238) comprises means for supplying energy to said volatile storage means for a limited period of time.

7. A cooking system as recited in claim 6 wherein said limited period of time comprises approximately two minutes.

8. A cooking system as recited in claim 6 and further including means for resuming the interrupted cooking cycle upon a resumption of power to said cooking means before the expiration of said limited period of time, and means for preventing the resumption of said interrupted cooking cycle if the cooking temperature has dropped by more than a predetermined amount during the period of said interruption.

9. A method for cooking a food product including the steps of providing a cooking cycle by which said food product is to be cooked, said cooking cycle including a plurality of time/temperature setpoints each of which specify that the cooking temperature be at a specified value at a specified time during said cooking cycle;

characterized in that the method further includes the step of inserting an alternate time/temperature setpoint into said cooking cycle for replacing all setpoints in said cooking cycle which have a time or a temperature greater than that of said alternate time/temperature setpoint.

10. A method as recited in claim 9 wherein said providing step comprises the step of selecting a desired cooking cycle from among a plurality of cooking cycles.

11. A method as recited in claim 9 wherein said inserting step comprises the step of inserting said alternate time/temperature setpoint while said cooking cycle is in progress.

12. A method as recited in claim 9 wherein said step of providing a cooking cycle comprises providing a cooking cycle program by which said food product is to be cooked and wherein said inserting step comprises the step of inserting said alternate time/temperature setpoint without modifying said cooking cycle program.

13. A method for cooking a food product including the steps of providing a cooking cycle program according to which said food product is to be cooked, said cooking cycle program being defined by a plurality of time/temperature setpoints, each of which specify that the cooking temperature be at a specified value at a specified time during the cooking cycle;

and cooking said food product pursuant to said cooking cycle program, characterized in that said method further includes the step of replacing one or more of said time/temperature setpoints of said cooking cycle with an alternate time/temperature setpoint to change said cooking cycle without changing said cooking cycle program.

14. A method as recited in claim 13 wherein said replacing step comprises the step of replacing the ending time or the ending temperature of said cooking cycle.

15. A method as recited in claim 13 wherein said providing step comprises the step of selecting said cooking cycle from among a plurality of preprogrammed cooking cycles.

16. A method as recited in claim 13 wherein said replacing step is performed while said food product is being cooked.

17. A cooking system including cooking means for cooking a food product and control means for establishing a cooking cycle for said food product by said cooking means, said control means including means for cooking said food product pursuant to a preprogrammed cooking cycle program, characterized in that said control means (11) includes means for changing said cooking cycle without modifying said preprogrammed cooking cycle program;

said preprogrammed cooking cycle program is defined by a plurality of preprogrammed time/temperature setpoints (302, 303, 304,

     305), each of which specify that the cooking temperature be at a particular value at a particular time during said cooking cycle; and

said means for changing said cooking cycle comprises means for inserting an alternate time/temperture setpoint (306) into said cooking cycle for replacing those preprogrammed time/temperature setpoints which have a time or a temperature value that is greater than that of said alternate setpoint.