Polymer-type humidity sensor
AssigneeSamsung Electronics Co., Ltd.
InventorsJong-Chull Shon, Keun-Seuk Oh, So-Hyun Lee, Won-Woo Lee, Jung-Eui Hoh
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Abstract
A polymer-type humidity sensor for use in a microwave oven and which has a polymer structure which includes a rubber and a predetermined amount of carbon, and a pair of electric terminals connected to the polymer structure. The polymer-type humidity sensor of the present invention has a rapid response time, durability, excellent adherence to terminals, low hysteresis, and exhibits stability to exposures of high temperatures and high relative humidity.
Claims25
A polymer-type humidity sensor comprising:
- a polymer structure of a predetermined shape, wherein said polymer structure comprises a rubber and carbon;
- and
- a pair of electric terminals contacting said polymer structure to measure an impedance to determine a relative humidity,
- wherein the carbon added to said polymer structure is in a range of 15-20%±5% volume.
A polymer structure to act as a sensing structure of a polymer-type humidity sensor, comprising:
- a rubber;
- and
- carbon mixed in said rubber,
- wherein the sensor measures an impedance of the polymer structure to determine a relative humidity, and wherein an amount of said carbon added to the polymer structure is in a range of 15-20%±5% by volume of the polymer structure.
A microwave oven to cook food comprising:
- a body including a cooking cavity;
- a heating element to cook the food in the cooking cavity;
- an air outlet unit to discharge air from the cooking cavity;
- a control unit which controls the cooking of the food;
- and
- a polymer-type humidity sensor disposed at said air outlet to obtain information on a humidity content of the discharged air for use by said control unit, wherein said polymer-type humidity sensor comprises
- a polymer structure of a predetermined shape and having a rubber and carbon, and
- a pair of electric terminals contacting the polymer structure to measure an impedance to determine a relative humidity,
- wherein an amount of said carbon added to the polymer structure is in a range of 15-20%±5% by volume of the polymer structure.
A polymer type-humidity sensor comprising:
- a polymer structure having opposing ends, wherein said polymer structure comprises a rubber and carbon;
- and
- electric terminals, each contacting a corresponding one of the opposing ends of said polymer structure to measure an impedance to determine a relative humidity
- wherein an amount of said carbon added to the polymer structure is in a range of 15-20%±5% by volume of the polymer structure.
The polymer type-humidity sensor of claim 22, wherein said polymer structure comprises a prismatic shape having said electrical terminals at the opposing ends of the prismatic shape.
- 25.The polymer type-humidity sensor of claim 24, wherein the prismatic shape has a rectangular cross-section.
A polymer-type humidity sensor comprising:
- a polymer structure of a predetermined shape, wherein said polymer structure comprises a rubber and carbon;
- and
- a pair of electric terminals contacting said polymer structure to measure an impedance to determine a relative humidity,
- wherein the polymer-type humidity sensor has an impedance of 2×106Ω and 5×105Ω at a relative humidity range of 0% and 100% and undergoes impedance change as a function of relative humidity over the whole relative humidity range.
Dependencies are inferred from the claim text.