Method of estimating a humidity level in a steam cooking chamber of a steam cooking appliance, method or operating the steam cooking appliance and steam cooking appliance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A21B-003/04
F24C-015/00
F24C-015/32
A23L-005/10
A47J-027/04
출원번호
US-0901940
(2014-06-26)
등록번호
US-10098354
(2018-10-16)
우선권정보
EP-13180811 (2013-08-19)
국제출원번호
PCT/EP2014/063465
(2014-06-26)
국제공개번호
WO2015/024689
(2015-02-26)
발명자
/ 주소
Faraldi, Paolo
Furlanetto, Riccardo
Gattei, Lorenzo
Pellis, Michele
출원인 / 주소
Electrolux Appliances Aktiebolag
대리인 / 주소
Pearne & Gordon LLP
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
The present application in particular is related to a method of estimating a humidity level in a steam cooking chamber (4) of a steam cooking appliance (1). The method comprises successively measuring static or quasi-static pressure values (P1, . . . , Pn) prevailing within the steam cooking chamber
The present application in particular is related to a method of estimating a humidity level in a steam cooking chamber (4) of a steam cooking appliance (1). The method comprises successively measuring static or quasi-static pressure values (P1, . . . , Pn) prevailing within the steam cooking chamber (4); successively calculating from the pressure values (P1, . . . , Pn); and setting and using the humidity index value (EH1, EHn) as an actual measure for the humidity level.
대표청구항▼
1. Method of operating a steam cooking process in a steam cooking cavity of a steam cooking appliance comprising: a. successively measuring, with a pressure sensor, static or quasi-static pressure values (P1, . . . , Pn) prevailing within the steam cooking cavity;b. successively calculating from the
1. Method of operating a steam cooking process in a steam cooking cavity of a steam cooking appliance comprising: a. successively measuring, with a pressure sensor, static or quasi-static pressure values (P1, . . . , Pn) prevailing within the steam cooking cavity;b. successively calculating from the pressure values or smoothed pressure values (P1, . . . , Pn) via iterative numerical integration a humidity index value (EH1, . . . , EHn), wherein the pressure values (P1, . . . , Pn) are measured at successive timepoints (t1, . . . , tn) and an actual humidity index value EHn) for a pressure value (Pn) is calculated from a preceding humidity index value (EHn−1);c. setting and using the humidity index value (EH1, . . . , EHn) as an actual measure for the humidity level; andd. activating or deactivating steam generation in the steam cooking appliance in dependence on the actual measure for the humidity level and at least one preset value of the humidity level. 2. Method according to claim 1, wherein the pressure sensor, via which the pressure values (P1, . . . , Pn) are measured, is arranged outside the cavity and is connected with the inner cavity volume via a communicating pipe. 3. Method according to claim 1, wherein the pressure sensor communicates with a zone within the cavity essentially unaffected by forced convection generated in the cavity by a fan. 4. Method according to claim 1, wherein the successive humidity index values (EH1, . . . , EHn) are calculated in a weighted iterative numerical integration. 5. Method according to claim 1, wherein the humidity index values (EH1, . . . , EHn) are calculated according to the following calculation rule: EHn=EHn−1+(Pn−Pn−1)*Kup−EHn−1*Krelax, if Pn>Pn−1 or a.EHn=EHn−1+(Pn−Pn−1)*Kdown−EHn−1*Krelax, if Pn≤Pn−1; b.wherein EHn and EHn−1 are successive humidity index values; Pn and Pn−1 are successive pressure values or successive smoothed pressure values, Kup is a first weighting factor, Kdown is a second weighting factor, and Krelax is a relaxation factor. 6. Method according to claim 5, wherein the factors Kup, Kdown, and Krelax are calibrated for each application. 7. Method according to claim 1, wherein the pressure sensor is adapted to measure pressures in the range from 0 to 30 Pa. 8. Method according to claim 1, wherein the pressure sensor is an absolute pressor sensor or a differential pressure sensor which is adapted to measure a difference pressure between inside of the cavity and outside of the cavity. 9. Method according to claim 1, wherein the actual humidity index value (EHn) is further calculated from the pressure value (Pn) and a preceding pressure value (Pn−1) for the preceding humidity index value (EHn−1). 10. Cooking appliance comprising a steam cooking functionality with a steam cooking cavity, a control unit, a pressure sensor and steam generation unit, respectively being coupled to the control unit, wherein the control unit is adapted to operate a steam cooking process according to the method of claim 1. 11. Cooking appliance according to claim 10, wherein the pressure sensor is mounted outside the cavity, and wherein the pressure sensor is connected to the inner volume of the cavity by a communicating pipe. 12. Cooking appliance according to claim 11, comprising a fan for forced ventilation or convection, wherein the communication pipe is connected to a section of the cavity volume which is essentially unaffected by the fan. 13. Cooking appliance according to claim 10, wherein the pressure sensor is an absolute pressure sensor or a differential pressure sensor and is adapted to calculate a difference pressure between the inside of the cavity and the outside of the cavity. 14. Cooking appliance according to claim 10, wherein the pressure sensor is adapted to sense pressures in the range between 0 and 100 Pa. 15. Cooking appliance according to claim 10, wherein the pressure sensor is adapted to sense pressures in the range between 0 Pa and 20 Pa.
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이 특허에 인용된 특허 (6)
Meister Siegfried (Siemensstr. 2 8910 Landsberg/Lech DEX), Apparatus for the heat treatment of foods or meals with a sensor tube.
Rombach, Martin; Langenbacher, Markus, Method and device for calibrating a humidity sensor and sensor arrangement having humidity sensor capable of calibration.
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