Dishwasher with a system for recognition of filling level
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0583697
(2004-12-10)
|
등록번호 |
US-7748394
(2010-07-26)
|
우선권정보 |
DE-103 60 561(2003-12-22); DE-10 2004 019 351(2004-04-21) |
국제출원번호 |
PCT/EP2004/053404
(2004-12-10)
|
§371/§102 date |
20060620
(20060620)
|
국제공개번호 |
WO05/060815
(2005-07-07)
|
발명자
/ 주소 |
- Curtius, Georg
- Hesterberg, Bernd
- Rosenbauer, Michael
- Schweier, Peter
|
출원인 / 주소 |
- BSH Bosch und Siemens Hausgeraete GmbH
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
A dishwasher with a system for filling level recognition may be achieved which reliably determines the fluid level inside the dishwasher without the use of moving parts, whereby the dishwasher is provided with at least one capacitive filling level sensor for recognition of the fluid level of the rin
A dishwasher with a system for filling level recognition may be achieved which reliably determines the fluid level inside the dishwasher without the use of moving parts, whereby the dishwasher is provided with at least one capacitive filling level sensor for recognition of the fluid level of the rinsing fluid contained in the dishwasher, the electrical capacitance of which changes depending on the height of the fluid level. The fluid level in the dishwasher can thus be reliably determined without the need for moving parts and merely by the use of electronic components. The system further permits a non-contact filling level recognition, whereby the filling level sensor and the rinsing fluid do not come into contact.
대표청구항
▼
The invention claimed is: 1. A dishwasher comprising: at least one washing container for receiving items to be handled, with the items to be handled being subjected to an operative handling cycle including at least one of a washing step and a rinsing step wherein the washing step includes introduct
The invention claimed is: 1. A dishwasher comprising: at least one washing container for receiving items to be handled, with the items to be handled being subjected to an operative handling cycle including at least one of a washing step and a rinsing step wherein the washing step includes introduction of a cleaning agent and a fluid carrier forming a washing fluid and the rinsing step includes introduction of a rinsing fluid; and a system for recognition of the fluid level of the washing fluid contained in the dishwasher, the fluid level recognition system having at least one capacitive filling level sensor having at least two probes, forming two capacitor plates, each operatively coupled to a sensor surface and projecting into the washing container for operative contact with the washing fluid, thereby using the washing fluid as a dielectric having a dielectric constant that changes with the fill level of the washing fluid, wherein at a first fill level the probes and the washing fluid form a capacitor having a first capacitance value indicating a first fill level and causing the filling level sensor to sense the first fill level and at a second fill level the probes and the washing fluid form a capacitor having a second capacitance value indicating a second fill level and causing the filling level sensor to sense the second fill level, wherein at least one sensor probe made of electrically conducting material is provided inside the washing container and an electromagnetic field can be formed between the sensor probe and the filling level sensor, wherein the electromagnetic field varies depending on the height of the liquid level or varies depending on the dielectric constant of the medium surrounding the sensor probe, and wherein the at least one sensor probe is arranged such that it is separated with respect to an active sensor surface of the filling level sensor by a wall of the washing container. 2. The dishwasher according to claim 1, wherein the filling level sensor is in the form of a capacitor whose electrical capacitance varies depending on the dielectric constant of the medium surrounding the filling level sensor. 3. The dishwasher according to claim 1, wherein the filling level sensor reacts to the relative dielectric constant of water. 4. The dishwasher according to claim 1, wherein the filling level sensor includes at least two opposite active sensor surfaces at which an electromagnetic field can be formed that varies as a function of the dielectric constant of the medium surrounding the sensor surfaces. 5. The dishwasher according to claim 1, wherein the filling level sensor is located outside the washing container, the filling level sensor has a selected one of at least one sensor surface and no sensor surfaces, and the filling level sensor and its respective sensor surfaces are isolated from the rinsing liquid by the wall of the washing container. 6. The dishwasher according to claim 1, wherein the electrical capacitance of the filling level sensor and its variation is detected using electrical means by at least one of a detection in a qualitative manner and a detection in a quantitative manner. 7. The dishwasher according to claim 1 and further comprising electronic storage means in which at least one reference value can be stored which corresponds to an electrical capacitance of the filling level sensor at a specific fluid level. 8. The dishwasher according to claim 1, wherein a certain limiting value of the electrical capacitance of the filling level sensor is specified to discriminate between whether the filling level sensor is located in the proximity of a medium having a high or low dielectric constant or whether the filling level sensor is surrounded by an aqueous fluid or by air. 9. The dishwasher according to claim 1, wherein the at least one sensor probe that is provided inside the washing container is disposed on a first side of the wall of the washing container, the first side being exposed to the washing fluid, and wherein the active sensor surface of the filling level sensor is located outside the washing container and on a second, opposite side of the wall of the washing container, the second, opposite side being isolated from exposure to the washing fluid by the wall of the washing container. 10. A dishwasher comprising: at least one washing container for receiving items to be handled, with the items to be handled being subjected to an operative handling cycle including at least one of a washing step and a rinsing step wherein the washing step includes introduction of a cleaning agent and a fluid carrier forming a washing fluid and the rinsing step includes introduction of a rinsing fluid; and a system for recognition of a fluid level of the washing fluid contained in the dishwasher, the fluid level recognition system having at least one capacitive filling level sensor having an electrical capacitance that changes as a function of a height of the fluid level, wherein at least one sensor probe made of electrically conducting material is provided inside the washing container and an electromagnetic field can be formed between the sensor probe and the filling level sensor, wherein the electromagnetic field varies depending on the height of the liquid level or varies depending on a dielectric constant of a medium surrounding the sensor probe, and wherein the at least one sensor probe is arranged such that it is separated with respect to an active sensor surface of the filling level sensor by a wall of the washing container.
이 특허에 인용된 특허 (3)
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Byatt John Anthony,CHX ; Christen Thomas,CHX ; Kleiner Thomas,CHX ; Matter Daniel,CHX ; Ruegg Walter,CHX, Capacitive level detector with optimized electrode geometry.
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Adamski Joseph R. (Sudbury MA) Coates Donald A. (Green Lake WI), Fluid level sensor and controller.
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Kumada Akira (Kanagawa JPX) Takata Eiichi (Kyoto JPX) Murata Michihiro (Kyoto JPX), Sensor for sensing the presence of electrolyte solution.
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