EP2798273A1 - Ofen mit einem optischen erkennungsmittel - Google Patents
Ofen mit einem optischen erkennungsmittelInfo
- Publication number
- EP2798273A1 EP2798273A1 EP12808271.6A EP12808271A EP2798273A1 EP 2798273 A1 EP2798273 A1 EP 2798273A1 EP 12808271 A EP12808271 A EP 12808271A EP 2798273 A1 EP2798273 A1 EP 2798273A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmitter
- receiver
- oven
- transparent plate
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
- F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens
Definitions
- the present invention relates to an oven comprising an optical detection means that is used for distance measurement or remote temperature measurement.
- optical detection systems are used in ovens for detecting the tray position, detecting the rise amount of the food in case that the cooked food is a pastry such as cake or detecting the surface temperature or color change of the food.
- Optical detection systems generally consist of a transmitter-light source or a receiver-light sensor pair.
- the light waves generated in the transmitter are sent in the direction of the target inside the oven, for example onto the cooked food or onto the tray whereon the food is placed, and the light is provided to be reflected from the target and the reflected light is converted into electrical signal by being projected onto the receiver.
- the optical detection systems are generally placed into a casing integrated onto the upper wall or side wall of the cooking cavity of the oven and are protected against high temperature by providing thermal insulation.
- a transparent plate (8’) such as a glass plate having high resistance against heat is placed between the environment wherein the receiver (6') and the transmitter (5') are situated, and the cooking cavity (3').
- the transparent plate (8’) provides the light generated by the transmitter (5’) to be transmitted to the target (H’) located in the cooking cavity (3') and the light reflected from the target (H’) to be transmitted to the receiver (6’) and at the same time, the transmitter (5') and the receiver (6') to be protected against the high temperature and humidity; however, the transparent plate (8’) also causes undesired light reflections between the transmitter (5’) and the receiver (6’) ( Figure 1).
- a cooker that comprises an optical arrangement consisting of a light source and a light sensor, and a glass plate which is placed between the optical arrangement and the cooking chamber.
- a heating cooker that comprises a LED and an infrared sensor which are arranged in the upper part of a cookroom.
- the aim of the present invention is the realization of an oven wherein the optical detection means placed onto the cooking cavity is provided to make error-free measurements.
- the oven realized in order to attain the aim of the present invention and explicated in the first claim and the respective claims thereof, comprises an optical detection means having a transmitter which is placed at the upper side of the cooking cavity and sends light waves onto a target inside the cooking cavity such as food or tray, a receiver which detects light waves reflected from the target and a casing whereto the transmitter-receiver pair is mounted.
- a glass plate is placed between the optical detection means and the cooking cavity in an inclined manner so as to prevent the beams sent from the transmitter from being reflected directly onto the receiver.
- the transparent plate is placed at the lower side of the transmitter and receiver in an inclined manner so as to face the transmitter, and thus, the beams reflected from the upper surface of the glass plate are provided to be blocked inside the casing.
- a separator which separates the transmitter and receiver areas, is placed between the inclined transparent plate and the casing.
- the upper edge of the separator contacts the casing between the transmitter and the receiver, and the lower edge of the separator contacts the transparent plate.
- the separator extends in the vertical direction in an inclined manner so as to move away from the transmitter and thus, does not limit the field of view of the transmitter.
- the transmitter is a LED light source generating visible light
- the receiver is a photo-detector detecting the visible beams.
- the transmitter is an infrared LED light source generating infrared beams
- the receiver is an infrared sensor.
- a transparent plate which transmits the infrared light with certain wavelengths, is used in the oven.
- a light barrier surrounding the receiver is integrated to the casing that carries the optical detection means, and the receiver is provided not to be exposed to other beams reflected from the environment.
- the transparent plate placed under the optical detection means in an inclined manner by means of the transparent plate placed under the optical detection means in an inclined manner, the beams reflected from the upper surface of the transparent plate are prevented from reaching the receiver and the receiver is provided to be exposed only to the beams reflected from the food inside the cooking cavity or from the tray, and thus, to make accurate measurements.
- Figure 1 - is the schematic view of a state of the art oven.
- Figure 2 - is the schematic view of the oven of the present invention.
- Figure 3 - is the schematic view of the optical detection means in an embodiment of the present invention.
- Figure 4 - is the schematic view of the optical detection means in another embodiment of the present invention.
- the oven (1) comprises an exterior body (2), a cooking cavity (3) wherein the cooking process is performed, and an optical detection means (4) which is located in the cooking cavity (3) and provides the detection of data such as the surface temperature, color change or position about the target (H) defined as the cooked food or the tray whereon the food is placed, and the control of the cooking process according to the data received from the target (H).
- the optical detection means (4) comprises a transmitter (5) which sends light waves onto the target (H), a receiver (6) which detects the change in the intensity of the light waves that are sent by the transmitter (5) and that return by being reflected from the target (H), and a casing (7) which is located at the upper side of the cooking cavity (3) and whereon the transmitter (5) and receiver (6) are mounted side by side so as to face the cooking cavity (3).
- the oven (1) of the present invention comprises a transparent plate (8) such as a glass plate which is placed between the optical detection means (4) and the cooking cavity (3) in an inclined manner with respect to the horizontal plane formed by the transmitter (5) and the receiver (6), thus, which prevents the beams, sent from the transmitter (5) and reflected from the upper surface thereof before entering the cooking cavity (3), from affecting the receiver (6) by diverting them.
- a transparent plate (8) such as a glass plate which is placed between the optical detection means (4) and the cooking cavity (3) in an inclined manner with respect to the horizontal plane formed by the transmitter (5) and the receiver (6), thus, which prevents the beams, sent from the transmitter (5) and reflected from the upper surface thereof before entering the cooking cavity (3), from affecting the receiver (6) by diverting them.
- the transparent plate (8) that is used in the oven (1) and placed between the optical detection means (4) and the cooking cavity (3) directs the beams generated in the transmitter (5) to the target (H) by refracting them to a degree according to the refraction index of the material it is produced from, and directs the beams reflected from the target (H) to the receiver (6).
- the transparent plate (8) furthermore, prevents the optical detection means (4) from being affected by the high humidity and temperature in the cooking cavity (3). Some of the beams generated in the transmitter (5) and directed to the target (H), for example 10% of them, does not pass through the transparent plate (8) and are reflected back from the upper surface of the transparent plate (8).
- the transparent plate (8) since the transparent plate (8) is placed in an inclined manner, the “undesired” beams reflected upwards from the upper surface are diverted by the transparent plate (8) and prevented from reaching the receiver (6) and thus, the receiver (6) is not exposed to light reflections that can cause it to make wrong detections and the receiver (6) makes accurate measurements by detecting only the beams reflected from the target (H).
- the transparent plate (8) is placed at the lower side of the transmitter (5) and receiver (6) so as to face the transmitter (5) and such that the vertical distance (h1) between the transparent plate (8) and the transmitter (5) is greater than the vertical distance (h2) between the transparent plate (8) and the receiver (6), and the transparent plate (8) extends from the level of the transmitter (5) to the level of the receiver (6) by rising ( Figure 3).
- the beams sent from the transmitter (5) and reflected from the transparent plate (8) are directed to the lower surface of the casing (7) by being diverted and thus, the reflected beams are substantially prevented from reaching the transmitter (5). Furthermore in this embodiment, the beams reflected from the transparent plate (8) do not project out beyond the optical detection means (4) and are blocked between the transparent plate (8) and the casing (7).
- the oven (1) comprises a separator (9) which extends between the transparent plate (8) and the casing (7) and separates the transmitter (5) and receiver (6) areas in the optical detection means (4), and the upper edge of which contacts the casing (7) between the transmitter (5) and the receiver (6) and the lower edge of which contacts the transparent plate (8), and which is produced from light-proof material such as plastic or metal ( Figure 4).
- the beams that are sent from the transmitter (5) and reflected from the transparent plate (8) are almost completely prevented from reaching the receiver (6).
- the separator (9) extends between the casing (7) and the transparent plate (8) in an inclined manner so as to move away from the transmitter (5) in the vertical direction.
- the separator (9) does not narrow down the visual field range of the transmitter (5) and furthermore, full contact is provided between the lower and upper edges of the separator (9), and the lower surface of the casing (7) and the upper surface of the transparent plate (8) and thus, light leaks are prevented.
- the transmitter (5) is a LED light source generating visible light
- the receiver (6) is a photo-detector detecting the visible beams reflected from the target (H).
- the transmitter (5) is a LED light source generating infrared light
- the receiver (6) is an infrared sensor detecting the infrared beams reflected from the target (H).
- the oven (1) comprises a transparent plate (8) produced from glass material which transmits the infrared beams having certain wavelengths, for example wavelengths between 500 nanometers and 2.5 micrometers (2500 nanometers).
- the optical detection means (4) comprises a light barrier (10) which is produced from light-proof material, mounted to the casing (7) and surrounds the receiver (6), and which prevents the beams reflected from the outer environment from affecting the receiver (6) ( Figure 4).
- the optical detection means (4) the environmental light reflections affecting the receiver (6) are minimized and there is a high probability that data can be obtained from the target (H).
- the transparent plate (8) placed between the optical detection means (4) and the cooking cavity (3) in an inclined manner by means of the transparent plate (8) placed between the optical detection means (4) and the cooking cavity (3) in an inclined manner, the beams sent from the transmitter (5) and reflected from the upper surface of the transparent plate (8) are prevented from reaching the receiver (6) and almost only the beams reflected from the target (H) are provided to reach the receiver (6).
- the receiver (6) is protected from the undesired light reflections and measurement errors are minimized.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR201112949 | 2011-12-26 | ||
PCT/EP2012/073583 WO2013098004A1 (en) | 2011-12-26 | 2012-11-26 | Oven with optical detection means |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2798273A1 true EP2798273A1 (de) | 2014-11-05 |
Family
ID=47458864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12808271.6A Withdrawn EP2798273A1 (de) | 2011-12-26 | 2012-11-26 | Ofen mit einem optischen erkennungsmittel |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2798273A1 (de) |
WO (1) | WO2013098004A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014210672A1 (de) * | 2014-06-05 | 2015-12-17 | BSH Hausgeräte GmbH | Gargerät mit Lichtmusterprojektor und Kamera |
DE102019204531A1 (de) | 2019-04-01 | 2020-10-01 | BSH Hausgeräte GmbH | Haushaltsgerät und Verfahren zum Bestimmen von Konturinformation von Gut |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644533A (en) * | 1979-09-18 | 1981-04-23 | Hitachi Heating Appliance Co Ltd | Heating apparatus |
JPS58140524A (ja) * | 1982-02-15 | 1983-08-20 | Toshiba Corp | 加熱調理装置 |
DE102007048834A1 (de) * | 2006-10-17 | 2008-04-24 | BSH Bosch und Siemens Hausgeräte GmbH | Hausgerätevorrichtung mit wenigstens einer Kamera |
EP2444735A2 (de) * | 2009-06-15 | 2012-04-25 | LG Electronics Inc. | Kochgerät und steuerverfahren dafür |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5181931A (ja) | 1975-01-17 | 1976-07-17 | Koshuha Netsuren Kk | Koshuhayotanmakitoransu |
GB0115308D0 (en) * | 2001-06-22 | 2001-08-15 | Caretek Ltd | Medical diagnostic instrument |
JP2006242420A (ja) | 2005-03-01 | 2006-09-14 | Toshiba Corp | 加熱調理器 |
JP2008051764A (ja) * | 2006-08-28 | 2008-03-06 | Sharp Corp | 測距センサ、及びその測距センサを搭載した電子機器 |
US8779361B2 (en) * | 2009-06-30 | 2014-07-15 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Optical proximity sensor package with molded infrared light rejection barrier and infrared pass components |
DE202011051072U1 (de) * | 2011-08-24 | 2011-10-05 | Poygreen Germany Gmbh | Infrarot-Temperaturmessvorrichtung mit Projektionsfunktion |
-
2012
- 2012-11-26 EP EP12808271.6A patent/EP2798273A1/de not_active Withdrawn
- 2012-11-26 WO PCT/EP2012/073583 patent/WO2013098004A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5644533A (en) * | 1979-09-18 | 1981-04-23 | Hitachi Heating Appliance Co Ltd | Heating apparatus |
JPS58140524A (ja) * | 1982-02-15 | 1983-08-20 | Toshiba Corp | 加熱調理装置 |
DE102007048834A1 (de) * | 2006-10-17 | 2008-04-24 | BSH Bosch und Siemens Hausgeräte GmbH | Hausgerätevorrichtung mit wenigstens einer Kamera |
EP2444735A2 (de) * | 2009-06-15 | 2012-04-25 | LG Electronics Inc. | Kochgerät und steuerverfahren dafür |
Non-Patent Citations (1)
Title |
---|
See also references of WO2013098004A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013098004A1 (en) | 2013-07-04 |
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