Control system for a microwave oven and method of making the same

• US 5,616,269 A
• Filed: 09/07/1994
• Issued: 04/01/1997
• Est. Priority Date: 09/07/1994
• Status: Expired due to Fees

• Current Assignee: Robertshaw Controls Company (Schneider Electric SE)
• Original Assignee: Robertshaw Controls Company (Schneider Electric SE)
• Inventors: Fowler, Daniel L., Tanis, Bruce E., Pattok, Greg R.
• Primary Examiner(s): Leung, Philip H.
• Application Number:
  US08/301,592
• Time in Patent Office: 937 Days
• Field of Search: 219/720, 219/702, 219/715, 219/506, 219/492, 364/477
• US Class Current: 219/720
• CPC Class Codes: H05B 6/6461 using fire or fume sensors
• CPC Class Codes: H05B 6/666 Safety circuits emergency protective circuits in general H02H

Abstract

A control system for a microwave oven having a magnetron unit and method of making the same are provided, the system being adapted to interconnect a power source to the magnetron unit to operate the same, the system comprising a display control module, a power module, and an electrical circuit interconnecting the modules together, each module comprising a microprocessor.

Claims

1. A control system for a microwave oven, comprising:

a display control module, said display control module substantially controlling all user input and output;

a power module, said power module substantially controlling all power functions;

a first bidirectional communication bus, connecting said display control module and said power module and allowing said display control module and said power module to communicate in a master-master configuration;

a third module comprising a local operating network; and

a second bidirectional communication bus connecting said third module and said display control module and allowing said third module and, said display control module to communicate in a master-master configuration.

2. The control system of claim 1, further comprising personal computer means interfaced to said third module.

3. The control system of claim 2, further comprising a plurality of order entry systems interfaced to said third module.

4. The control system of claim 2, further comprising a plurality of microwave ovens interfaced as a network to said third module.

5. The control system of claim 1, wherein said display control module is spaced from said power module.

6. The control system of claim 5, wherein said display control module comprises a low voltage assembly and said power module comprises a high voltage assembly.

7. The control system of claim 1, wherein each of said bidirectional communication buses comprises a serial output line, a serial input line, a clock line, and an acknowledge line.

8. The control system of claim 7 further comprising means for providing serial communication protocol between said display control module and said power module.

9. The control system of claim 8, wherein said means for providing serial communication protocol further includes error detection means.

10. The control system of claim 9, wherein said error detection means comprises said acknowledge line having means for sending a low signal at the start of and throughout a communication and a high signal at the end of a communication.

11. The control system of claim 1, further comprising means for providing serial communication protocol between said display control module and said third module.

12. The control system of claim 11, wherein said means for providing serial communication protocol further includes error detection means.

13. The control system of claim 12, wherein said error detection means comprises said acknowledge line having means for sending a low signal at the start of and throughout a communication and a high signal at the end of a communication.