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A microwave oven and a method of controlling the same that is capable of detecting the respective positions of heaters using detectors for which a number thereof is less than a number of cooking modes. Cooking is performed with the heaters in respective horizontal positions in a cooking mode in whic

A microwave oven and a method of controlling the same that is capable of detecting the respective positions of heaters using detectors for which a number thereof is less than a number of cooking modes. Cooking is performed with the heaters in respective horizontal positions in a cooking mode in which cooking requiring the heaters to heat food is performed, while cooking is performed with the heaters positioned in the respective initial positions in a cooking mode in which the cooking not requiring the heaters to heat the food is performed. Each of the detectors is a micro switch operated by a cam. Accordingly, in the microwave oven and in the method of controlling the same, the number of the detectors to detect the respective positions of the heaters is decreased. Further, an electrical wire is connected to a single micro switch to detect the respective positions of the heaters.

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1. A microwave oven having a cooking cavity, comprising:two or more electrical heaters rotatably disposed in the cooking cavity; a heater drive unit that rotates the two or more electrical heaters; and a heater position detection unit that detects respective rotation positions of the two or more ele

1. A microwave oven having a cooking cavity, comprising:two or more electrical heaters rotatably disposed in the cooking cavity; a heater drive unit that rotates the two or more electrical heaters; and a heater position detection unit that detects respective rotation positions of the two or more electrical heaters using one or more detectors, a number of the one or more detectors being less than a number of cooking modes of the microwave oven, wherein the plural heaters are rotated to respective initial positions when cooking food in a first cooking mode, and the plural heaters are rotated to respective operation positions, different from the respective initial positions, when cooking the food in a second cooking mode. 2. The microwave oven as set forth in claim 1, wherein each of the one or more detectors comprises:a micro switch. 3. The microwave oven as set forth in claim 1, wherein the respective rotation positions of the two or more electrical heaters are changed according to the cooking modes.4. The microwave oven as set forth in claim 1, wherein the heater position detection unit comprises:a control unit that determines whether the respective rotation positions of the two or more electrical heaters are respective initial positions. 5. The microwave oven as set forth in claim 4, wherein the control unit checks the respective rotation positions of the two or more electrical heaters when power is initially supplied or when the power is re-supplied after a supply of the power is cut off.6. The microwave oven as set forth in claim 4, wherein the respective initial positions comprise:respective positions where the two or more electrical heaters are vertically positioned next to respective sidewalls of the cooking cavity. 7. The microwave oven as set forth in claim 4, wherein the heater position detection unit comprises:a cam that operates the one or more detectors according to the respective rotation positions of the two or more electrical heaters. 8. The microwave oven as set forth in claim 1, wherein the heater drive unit comprises:a motor having a drive shaft that rotates the two or more electrical heaters; and a gear that attaches to the drive shaft of the motor and rotates together with the drive shaft. 9. The microwave oven as set forth in claim 1, wherein the cooking modes comprise:first and second cooking modes such that in the first cooking mode food is cooked using a magnetron but is not cooked using the two or more electrical heaters, and in the second cooking mode the food is cooked using both the magnetron and the two or more electrical heaters. 10. The microwave oven as set forth in claim 9, wherein the two or more electrical heaters are rotated to reach respective initial positions if cooking is performed in the first cooking mode, while the two or more electrical heaters are rotated to reach respective operation positions if cooking is performed in the second cooking mode.11. The microwave oven as set forth in claim 10, wherein the respective initial positions are respective positions where the two or more electrical heaters are vertically positioned next to respective sidewalls of the cooking cavity, and the respective operation positions are respective positions where the two or more electrical heaters are horizontally positioned between a top of the cooking cavity and a bottom of the cooking cavity.12. The microwave oven as set forth in claim 1, wherein if the two or more electrical heaters are operated in a common way, the heater position detection unit detects a position of one of the electrical heaters representing all of the electrical heaters.13. A microwave oven having a cooking cavity, comprising:two or more electrical heaters rotatably disposed in the cooking cavity; a heater drive unit that rotates the two or more electrical heaters; and a heater position detection unit that detects respective rotation positions of the two or more electrical heaters using one or more detectors, a number of the one or more detectors being less than a number of cooking modes of the microwave oven, wherein the heater position detection unit comprises: a control unit that determines whether the respective rotation positions of the two or more electrical heaters are respective initial positions, wherein the heater position detection unit comprises: a cam that operates the one or more detectors according to the respective rotation positions of the two or more electrical heaters, wherein the cam comprises: first and second semicircular regions having different radii and joined at straight edges thereof such that an arc of the first semicircular region with a first radius contacts with a selected one or ones of the detectors to turn on the selected one or ones of the detectors, while an arc of the second semicircular region with a second radius does not contact with the one or more detectors and does not turn on the one or more detectors. 14. The microwave oven as set forth in claim 13, wherein the cam is positioned in a vicinity of one detector and contacts only the one detector.15. The microwave oven as set forth in claim 13, wherein the first radius of the first semicircular regions of the cam is larger than the second radius of the second semicircular region of the cam.16. A microwave oven having a cooking cavity, comprising:a plurality of electrical heaters that are rotatably disposed in the cooking cavity; a heater drive unit that rotates the plurality of the electrical heaters in a common cooking mode at a common angle; and a heater position detection unit having a single detector that detects respective vertical positions where the plurality of the electrical heaters, respectively, are vertically positioned, and respective horizontal positions where the plurality of the electrical heaters, respectively are horizontally positioned. 17. The microwave oven as set forth in claim 16, wherein the heater position detection unit checks respective positions of the plurality of the electrical heaters when power is initially supplied or when the power is re-supplied after a supply of the power is cut off.18. The microwave oven as set forth in claim 16, wherein respective initial positions of the plurality of heaters are the respective vertical positions.19. The microwave oven as set forth in claim 16, wherein the plurality of the electrical heaters are disposed in the respective vertical positions to cook food when cooking is performed in a first cooking mode such that the food is cooked using a magnetron but the food is not cooked using the plurality of the electrical heaters, and the plurality of the electrical heaters are disposed in the respective horizontal positions to cook the food when cooking is performed in a second cooking mode such that the food is cooked using both the magnetron and the plurality of the electrical heaters.20. A microwave oven having a cooking cavity, comprising:plural heaters moveably disposed in the cooking cavity; a heater drive unit to move the plural heaters; and a heater detection unit having one or more detectors to detect respective positions of the plural heaters using the one or more detectors, a number of the detectors being less than a number of cooking modes of the microwave oven, wherein the plural heaters are rotated to respective initial positions when cooking food in a first cooking mode, and the plural heaters are rotated to respective operation positions, different from the respective initial positions, when cooking the food in a second cooking mode. 21. The microwave oven as set forth in claim 20, wherein each of the detectors comprises:a micro switch. 22. The microwave oven as set forth in claim 20, wherein the respective positions of the plural electrical heaters are changed according to the cooking modes.23. The microwave oven as set forth in claim 20, wherein the heater detection unit comprises:a control unit to determine if the respective positions of the plural heaters are respective initial positions. 24. The microwave oven as set forth in claim 23, wherein the control unit checks the respective positions of the plural heaters when power is initially supplied or when the power is re-supplied after a supply of the power is cut off.25. The microwave oven as set forth in claim 23, wherein the respective initial positions comprise:respective positions where the plural heaters are vertically positioned next to respective sidewalls of the cooking cavity. 26. The microwave oven as set forth in claim 23, wherein the heater detection unit comprises:one or more cams to operate one or more corresponding detectors, each one of the detectors operating according to positions of a corresponding one or ones of the plural heaters. 27. The microwave oven as set forth in claim 20, wherein the heater drive unit comprises:a motor to rotate the plural heaters; and one or more gears operatively connected between the plural heaters and the motor such that a rotation of the motor moves the plural heaters. 28. The microwave oven as set forth in claim 20, wherein the respective initial positions are respective positions where the plural heaters are positioned adjacent to respective sidewalls of the cooking cavity, and the respective operation positions are other respective positions where the plural heaters are positioned remote from the respective sidewalls of the cooking cavity.29. A microwave oven having a cooking cavity, comprising:plural heaters moveably disposed in the cooking cavity; a heater drive unit to move the plural heaters; and a heater detection unit having one or more detectors to detect respective positions of the plural heaters using the one or more detectors, a number of the detectors being less than a number of cooking modes of the microwave oven, wherein the heater detection unit detects the respective positions of the plural heaters by counting the driving period of the heater drive unit and comparing the counted driving period with preset values corresponding to the respective positions of the plural heaters. 30. A microwave oven having a cooking cavity, comprising:plural heaters moveably disposed in the cooking cavity; a heater drive unit to move the plural heaters; and a heater detection unit having one or more detectors to detect respective positions of the plural heaters using the one or more detectors, a number of the detectors being less than a number of cooking modes of the microwave oven, wherein the respective positions of the plural heaters are all positioned parallel to each other and extend in a first direction in a first cooking mode and are all aligned with each other and extend in a second direction, different from the first direction, in a second cooking mode. 31. The microwave oven as set forth in claim 30 further comprising:a magnetron, wherein; the first cooking mode comprises: cooking food using only the magnetron to irradiate the food with microwaves; and the second cooking mode comprises: cooking the food using both the magnetron to irradiate the food with the microwaves and the plural heaters to heat the food. 32. The microwave oven as set forth in claim 30, wherein the first direction is a vertical direction and the second direction is a horizontal direction.33. A microwave oven having a cooking cavity, comprising:plural heaters moveably disposed in the cooking cavity; a heater drive unit to move the plural heaters; and a heater detection unit having one or more detectors to detect respective positions of the plural heaters using the one or more detectors, a number of the detectors being less than a number of cooking modes of the microwave oven, wherein when the plural heaters are moved, the heater detection unit detects a position of one of the plural heaters representing the respective positions of all of the heaters.