Source: https://patents.google.com/patent/US6066839?oq=U.S.+Patent+No.+4%2C528%2C643
Timestamp: 2018-03-23 11:30:36
Document Index: 653373867

Matched Legal Cases: ['art 3', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 6', 'art 3', 'art 6', 'art 3', 'art 3', 'art 6', 'art 3', 'art 3']

US6066839A - Temperature compensation method for a microwave oven - Google Patents
Temperature compensation method for a microwave oven Download PDF
US6066839A
US6066839A US09191346 US19134698A US6066839A US 6066839 A US6066839 A US 6066839A US 09191346 US09191346 US 09191346 US 19134698 A US19134698 A US 19134698A US 6066839 A US6066839 A US 6066839A
US09191346
A temperature compensation method for a microwave oven, and more particularly a method capable of compensating for a detected temperature error of a food which is caused by electromagnetic wave noise when a heating operation of microwave oven is controlled by an infrared sensor. The method includes a first step of comparing a detected temperature with a predetermined cooking temperature, a second step of halting the heating operation when the detected temperature is higher than the cooking temperature, a third step of comparing a real detected temperature of the food with the cooking temperature as heating operation is stopped, and a fourth step of compensating the real temperature of the food by resuming the heating operation when the real temperature of food is lower than the cooking temperature.
The object of the present invention is to provide a method capable of compensating for a detected temperature error of a food caused by electromagnetic wave noise when a heating operation of a microwave oven is controlled by an infrared sensor.
The characteristics and advantage of the present invention will become more apparent by describing the preferred embodiments thereof with reference to the accompanying drawings, in which:
According to FIG. 1, the present invention comprises a turntable 2 located in the center of a cooking chamber 1, a heating part 3 for generating a microwave to heat food 7, a temperature sensor 5 of the non-contacting type, such as a thermopile sensor for detecting a temperature of the food 7 through an opening 4 placed in the upper part of the cooking chamber 1 and a controlling part 6 for controlling all the operations of each of parts disclosed above. According to FIG. 3, the controlling part 6 comprises: a key inputting part 6A for predetermining a cooking temperature appropriate for a desired cooking level, and accuating a heating start key; a predetermined temperature storing part 6B for storing a predetermined cooking temperature; a detected temperature storing part 6C for storing the temperature detected from the sensor 5, and a displaying part 6D for displaying the predetermined cooking temperature or the detected temperature, etc. Also, the controlling part 6 comprises an output controlling part 6E for controlling the operation of the heating part 3 by comparing the cooking temperature with the detected temperature; a first timer 6F for maintaining a cooking time, and a second timer 6G for counting a rotation cycle of the turntable 2.
CM=(0.5×CS-15) (step 127)
The output controlling part 6E recognizes that the detected temperature has reached the cooking temperature due to electromagnetic wave noise in step 105 (the result gained from carrying out the steps up to step 131) and re-operates the heating part 3. Regardless of temperature detected from the sensor 5, by adding the temperature (0.05×re-operation time TI of the heating part 3) gained in proportion to the heating time to reach the maximum temperature CMAX of food obtained in step 125 step, the output controlling part 6E calculates the detected temperature CC (step 107).
If the real temperature of the food 7 does not reach an approximate value of the cooking temperature, the present invention determines that the detected temperature reaches the cooking temperature due to an electromagnetic wave noise and re-operates the heating part 3. Regardless of the temperature detected from the sensor 5, the present invention compares the re-calculated temperature, which adds the temperature (0.05×re-operation time TI of the heating part 3) gained in proportion to the heating time to the maximum temperature CMAX of the food 7, with the cooking temperatures and determines when the real temperature of the food 7 reaches the cooking temperature and stops the cooking process.
1. A method for compensating a cooking temperature in a microwave oven, the method comprising the steps of:
heating a food stuff in a microwave cavity;
comparing a temperature of said food stuff detected by an infrared sensor with a predetermined cooking temperature;
detecting another temperature of said food stuff during a non-heating operation of the microwave oven;
comparing said another temperature of said food stuff with said predetermined cooking temperature;
compensating for said another temperature of said food stuff by resuming a heating operation when said another temperature of said food stuff is lower than said predetermined cooking temperature; and
recalculating said another temperature when it is determined said another temperature reaches said predetermined cooking temperature due to an electromagnetic wave noise.
US09191346 1997-11-14 1998-11-13 Temperature compensation method for a microwave oven Expired - Fee Related US6066839A (en)
KR97-60143 1997-11-14
KR19970060143A KR100275887B1 (en) 1997-11-14 1997-11-14 Method for compensating temperature of microwave oven
US09449203 US6486081B1 (en) 1998-11-13 1999-11-24 Gas distribution system for a CVD processing chamber
US6066839A true US6066839A (en) 2000-05-23
ID=19524771
US09191346 Expired - Fee Related US6066839A (en) 1997-11-14 1998-11-13 Temperature compensation method for a microwave oven
US (1) US6066839A (en)
EP (1) EP0917403B1 (en)
KR (1) KR100275887B1 (en)
CN (1) CN100343581C (en)
DE (2) DE69821449T2 (en)
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KR20120098751A (en) 2009-10-26 2012-09-05 솔베이 플루오르 게엠베하 Etching process for producing a tft matrix
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CN100343581C (en) 2007-10-17 grant
DE69821449T2 (en) 2004-12-02 grant
EP0917403A3 (en) 1999-09-22 application
CN1218169A (en) 1999-06-02 application
EP0917403B1 (en) 2004-02-04 grant
KR100275887B1 (en) 2001-02-01 grant
DE69821449D1 (en) 2004-03-11 grant
EP0917403A2 (en) 1999-05-19 application
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US5545881A (en) 1996-08-13 Heating time control apparatus and method thereof for microwave oven
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