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
  • F24C3/00—Stoves or ranges for gaseous fuels
  • F24C3/12—Arrangement or mounting of control or safety devices
  • F24C3/126—Arrangement or mounting of control or safety devices on ranges
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
  • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
  • G01J5/02—Constructional details
  • G01J5/04—Casings
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J27/00—Cooking-vessels
  • A47J27/56—Preventing boiling over, e.g. of milk
  • A47J27/62—Preventing boiling over, e.g. of milk by devices for automatically controlling the heat supply by switching off heaters or for automatically lifting the cooking-vessels
• • 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
  • F24C15/00—Details
  • F24C15/10—Tops, e.g. hot plates; Rings
• • 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
  • F24C3/00—Stoves or ranges for gaseous fuels
  • F24C3/12—Arrangement or mounting of control or safety devices

Definitions

• the present invention relates to a gas hob and a hob arrangement with at least one gas hob. Furthermore, the present invention relates to a method for operating a gas hob.
• Modern household appliances are subject to strict safety regulations.
• effective measures for fire prevention in relation to cooking especially gas hobs are required.
• a gas cooker fire can be prevented by always keeping the temperature of a food container or pot associated with the gas cooker below a threshold value of 250.degree. This requires permanent monitoring of the temperature of the food container.
• the temperature of the food container is monitored by means of a sensor which is coupled to a spring. To determine the temperature of the
• the spring presses the sensor against the food container, preferably the bottom of the Gargut capableers, and detects the temperature of the direct thermal contact.
• the sensor thus determines the temperature of the food container.
• the sensor and the spring not only affect the aesthetic image of the gas hob, but also represent another, sometimes difficult to clean component of the gas hob. However, the user is desired gas hobs that reliably the temperature of a
• Gargut sets determine and at the same time have a harmonious appearance, especially in hob arrangements, and are easy to clean.
• an object of the present invention is to provide an improved gas hob, an improved cooktop assembly having at least one gas hob, and an improved method of operating a gas hob.
• a gas hob which has at least one infrared sensor for non-contact determination of a temperature of the gas hob associated Gargut examplesers.
• An infrared sensor detects temperatures based on thermal radiation in the form of infrared radiation. When heating a Gargut mattersers this is heated and emits heat radiation. The heat radiation of the food container radiates into the room. An infrared sensor receives the heat radiation, whereby the temperature of the
• Gargut relieers can be determined.
• Infrared sensors are small, compact components that can be easily integrated into gas hobs. Due to the heat radiation no contact between the infrared sensor and the food container is required. As a result, the infrared sensor can be arranged at almost any point in the gas hob.
• the infrared sensor is adapted to detect radiated heat radiation from the underside of a food container. This is particularly advantageous since the cooking product container is generally heated from below and thus the underside of the food container thus forms the warmest region of the food container. In this way a reliable temperature determination is ensured.
• the gas hob comprises a gas burner, wherein the infrared sensor is arranged in a region around the gas burner.
• the infrared sensor in the cooktop plate, in which the gas burner is used be arranged. This has the advantage that the infrared sensor at
• the gas cooker has a gas burner, and the infrared sensor is arranged in a region in or on the gas burner.
• the infrared sensor is not exposed in this way so much to the resulting when using the Gargut mattersers impurities (splashes of liquid food or solid food ingredients). In this way, a long life of the infrared sensor and thus a long-term reliable temperature determination is ensured.
• the gas burner also has a
• the infrared sensor is located below the burner cover.
• the burner cap is at least partially formed of an infrared-transparent material.
• the radiated from the food container Heat radiation through the infrared-transparent material of the burner cover through and hit the infrared sensor.
• the infrared sensor can be arranged directly under the part of the burner cover formed from infrared-transmitting material. But it is also conceivable, the infrared sensor adjacent to the
• the burner cap is at least partially formed of glass ceramic.
• the glass ceramic used is, in particular, a material permeable to infrared radiation. At the same time, glass ceramic is easy to clean and contributes to a harmonious appearance of the gas hob due to its flat, smooth surface structure. Examples of glass ceramics are silicon dioxide, aluminum oxide, magnesium oxide, titanium oxide, zinc oxide or zirconium oxide.
• the gas burner has a burner cap, and the infrared sensor pierces the burner cap.
• the infrared sensor ensures that it is always located directly below the bottom of the food container, which ensures a reliable temperature measurement.
• the infrared sensor is easily accessible during maintenance and repair work.
• Infrared sensor coupled optical fiber for transmitting the radiated from the food container heat radiation to the infrared sensor.
• the heat radiation receiving end of the light guide can be arranged at any point around the gas burner around or on or in the gas burner, while the other end of the light guide is coupled to the infrared sensor.
• an even more flexible arrangement of the infrared sensor can be ensured.
• a large distance between the gas hob and the infrared sensor can be bridged, so that the infrared sensor spaced from the Gas cooker can be arranged. This may be necessary if the installation space of the gas hob does not allow an arrangement of the infrared sensor directly on or in the gas hob.
• a small distance between the gas hob and the infrared sensor can also be bridged by means of the light guide, so that the infrared sensor can be arranged near or directly in or on the gas hob.
• the optical waveguide comprises polymeric optical fibers or glass fibers. These types of fibers have proven to be favorable for the conduction of light waves.
• a hob arrangement with at least one gas hob is proposed as described above.
• a hob arrangement allows monitoring of one or more gas hobs.
• a cooktop arrangement with several gas burners and an infrared sensor is also proposed.
• the thermal radiation of different food containers, which are associated with the gas burners are transmitted, for example by means of signal conductors to the infrared sensor. It may be fiber optic signal conductors capable of transmitting infrared signal.
• Such an arrangement has the advantage that only a single sensor is sufficient to monitor several gas hobs. This allows a reliable and low-maintenance monitoring system.
• the at least one infrared sensor generates sensor signals which are transmitted to a control module.
• control module controls a heating power of the gas hob in dependence on a temperature determined by the infrared sensor.
• the control module may control the heating power of each individual gas hob, such as reducing or completely stopping (reducing to zero) when a particular temperature of a food storage container is detected.
• the control module controls only the heating power of those
• Gas hob which has heated a food storage container associated with it to over 250 ° C, while the heat output of the other gas hobs remains unchanged.
• the control module simultaneously controls the heat output of all gas hobs. Occasionally reduced or terminated (reduced to zero, switch off) the control module, the heating capacity of all gas hobs as soon as the temperature of a single food storage container has reached the threshold of 250 ° C.
• the method comprises the following steps:
• Infrared sensor detected temperature.
• Fig. 1 shows a perspective view of a detail of a first embodiment of a gas cooking point
• Fig. 2 shows a cross-sectional view of a second embodiment of a gas cooking station
• FIG. 3 shows a plan view of a hob arrangement according to the invention.
• the gas hob 1 shows a perspective view of a section of a first embodiment of a gas hob 1.
• the gas hob 1 has a gas burner 2 for generating gas flames.
• the gas burner 2 has a burner neck 3 for supplying gas and a burner cap 4 for guiding the gas to an edge of the gas burner 2 with gas outflow openings 5.
• Fig. 1 only the protruding from a hob plate 11 part of the burner neck 3 is shown. This part of the burner neck 3 is substantially sleeve-shaped.
• the protruding from the cooktop plate 1 1 part of the burner neck 3 has a vertically extending from the cooktop plate 1 1 ring, followed by a ring with conically converging cross section at its upper edge.
• the ring of conically converging cross-section has a plurality of circumferentially disposed gas outflow openings 5, which allow the gas flowing through the burner neck 3 to flow out of the gas.
• the burner cover 4 is circular disk-shaped and arranged horizontally on the burner neck 3. Alternatively, the burner cap 4 may also be formed as a disc in another form, such as in elliptical, quadrangular or polygonal shape.
• an infrared sensor 6 for determining a temperature of a cooking utensil (not shown) arranged on the gas hob 1
• the infrared sensor 6 detects heat radiation IR, which is radiated, for example, from a hot pot bottom.
• the heat sensor 7 is heated by a burner flame during operation of the gas hob 1 and the gas burner 2. if the
• Burner flame goes out, the heat sensor 7 generates a signal that leads to a closure of the corresponding gas valve for the burner 2. With the help of the ignition device 5 gas flowing from the Gasausströmö Maschinenen be ignited.
• a spark is generated by means of the ignition device 8.
• the infrared sensor 6, the heat sensor 7 and the igniter 8 are arranged on the cooktop panel surrounding the burner neck 3 so as to extend vertically upwardly from the cooktop panel in an imaginary circular path.
• the infrared sensor 6, the heat sensor 7 and the ignition device 8 pierced at openings 15, the hob plate 1 1 and are connected to the bottom side with control and signal lines to other facilities of each gas range or gas hob.
• FIG. 2 shows a cross-sectional view of a second embodiment of the gas hob 1.
• the gas hob 1 shown in FIG. 2 has the same as that shown in FIG.
• Gas hob 1 a gas burner 2, which has a burner neck 3 and a burner cap 4 arranged horizontally above the burner neck 3.
• the burner neck 3 has a mixing chamber 9 extending horizontally in the burner neck 3 for mixing gas and primary air.
• At the outer edge of the mixing chamber 9 extend in the vertical direction more Gasausströmkanäle 10, which open into horizontally arranged Gasausströmö réelleen 5. Due to the sectional view in Fig. 2, only two Gasausströmkanäle 10 and Gasausströmö réelleen 5 are shown. In fact, however, the mixing chamber 9 has several arranged along its outer edge
• the burner neck 3 is inserted into a horizontally extending hob plate 11, so that it protrudes from this in the vertical direction.
• an infrared sensor 6 for determining a temperature of a arranged on the gas hob 1 Gargut matterers 30 is arranged.
• the infrared sensor 6 extends vertically in the mixing chamber 9 of the burner neck 3. In other words, the infrared sensor 6 is directed to the underside of the burner cap 4. In this case, the infrared sensor 6 is arranged almost centrally under the burner cover 4.
• the infrared sensor 6 can also be arranged at any other position inside the burner neck 3, for example at an outer edge of the mixing chamber 9, in the radial direction of the mixing chamber 9 before or after
• Gas exhaust ducts 10 10.
• the burner cover 4 should at least partially from a
• the region formed from an infotranslucent material is preferably arranged directly above the infrared sensor 6, but may also be arranged at any other position in the burner cover 4.
• a heat sensor 7 for detecting a gas flame is shown. The heat sensor 7 pierces the hob plate 11 and extends from the hob plate 11 vertically upwards.
• the food storage container 30 has a cooking product lower part 31 and a food container cover 32.
• Gargutserunterteil 31 is cup-shaped. On the upper open edge of the Gargut matterserunterteils 31 sits flush with the Gargut matterserdeckel 32.
• the Gargut anyer 30 is held by several Topflyfingern 22 above the gas burner 2.
• the pot carrier fingers 22 extend in such a horizontal direction that the
• Gargut aser 30 at least partially rests on the top of the pot carrier fingers 22. Due to the sectional view in Fig. 2, only two pot carrier fingers 22 are shown.
• the food container 30 is located on a plurality of, that is three or more, pot carrier fingers 22.
• 3 shows a top view of an embodiment of a hob arrangement 100.
• the hob arrangement 100 has five gas cooking stations 1, 1A, 1B, 1C, 1D.
• Each of the four outer gas hobs 1, 1A, 1 B, 1 C has a gas burner 2, 2A, 2B, 2C, 2D with a burner cap 4.
• the burner caps 4 are each circular, but differ in their diameters.
• a pot carrier 20 is arranged to each gas burner 2, 2A, 2B, 2C, 2D.
• the pot carrier 20 each has a in
• the four long pot carrier fingers 22 each extend in a 90 ° -Wnkel each other from the Pot carrier frame 21 toward the burner cover 4.
• the four short pot carrier fingers 22 are arranged near the corners of the pot carrier frame 21 parallel to the extending in the orientation of FIG. 3 in a left-right direction long pot carrier fingers 22.
• the gas hob 1 D is arranged in the hob arrangement 100 of each two gas hobs 1, 1A, 1 B, 1 C left and right framed.
• the gas hob 1 D is equipped with a dual burner 2D, which can realize several flame rings.
• the inner burner cap 4D is designed in the manner of a circular disk, and the second outer burner cap 4E is arranged as a ring around the inner burner cap 4D. From the annular burner cap 4E, a flame crown may be generated inwardly toward the inner burner cap 4D and outward. The more flames are formed, the higher the heat output of the gas hob 1 D.
• the gas hob 1 D has a pot carrier 20.
• the pot carrier 20 has in each case a substantially rectangular pot carrier frame 21, on which eight pot carrier fingers 22 are provided, four long pot carrier fingers 22 and four short pot carrier fingers 22, like the
• Pot carrier fingers 22 of the gas cooking stations 1, 1A, 1 B, 10 are arranged.
• Each gas hob 1, 1A, 1B, 10, 1D is an infrared sensor 6, 6A, 6B, 60, 6D
• the gas cooking stations 1, 1A, 1B, 10 have an infrared sensor 6, 6A, 6B, 60 arranged around the gas burner 2, and the central gas hob 1D has an infrared sensor 6D arranged in the dual burner 2D.
• the infrared sensor 6D associated with the central hotplate 1D is in the outer annular one
• Each infrared sensor 6, 6A, 6B, 60, 6D is provided with a signal conductor 12, 12A, 12B, 120, 12D for transmitting sensor signals.
• the signal conductor 12 extends in each case from the infrared sensor 6, 6A, 6B, 60, 6D to a control module 13.
• the control module 13 is set up in particular depending on the respective sensor signal of an infrared sensor 6, 6A, 6B, 60, 6D, the heating power of those Gas hob or gas cooking stations l, 1A, 1 B, 10, 1 D to control their assigned gas well 30 a temperature above a predetermined
• Threshold temperature has reached, for example, 250 ° C.
• the control module can either reduce the heating power or even completely stop, that is to reduce to zero.
• the infrared sensors 6, 6A, 6B, 60, 6D have, for example, a Detection direction in each case towards a potentially above the
• Gas cooker is directed to the pot carrier set food containers. Therefore, the radiated example of the respective bottom of the pot heat can be detected as infrared radiation. With the help of the control module 13, the temperature is then determined and evaluated.
• a control knob 14 of a gas hob 1, 1A, 1 B, 1 C, 1 D assigned.
• the control knob 14 are formed as a rotary knob.
• one or more gas hobs 1, 1A, 1 B, 1 C, 1 D are started by actuating the or those control knob 14. More specifically, by turning a certain control knob 14, a desired heating power of a particular gas hob 1, 1A, 1 B, 1 C, 1 D can be set.
• heating gas flows into the gas burner 2 of the corresponding gas hob 1, 1A, 1 B, 1 C, 1 D.
• the heating gas flows out of a
• Heating gas reservoir (not shown) through the burner neck 3 in the mixing chamber 9, where it mixes with primary air, which also flows through one or more openings (not shown) in the mixing chamber 9.
• the gas-air mixture then flows through the Gasausströmkanäle 10 to the gas outflow openings 5, through which it out of the
• Torch neck 3 exits.
• the gas-air mixture is led horizontally to the outside of the gas burner 2. If the gas-air mixture reaches the outer edge of the gas burner 2, it is ignited by the ignition device 8 arranged there and forms a flame rim along the circumference of the burner cover 4.
• the ignition device 8 arranged there and forms a flame rim along the circumference of the burner cover 4.
• three flame rings are formed along the circumferences in certain operating situations the respective burner cap 4D, 4E.
• the cooking product container 30 in particular the bottom of the cooking product lower part 31, emits heat radiation in the form of infrared radiation.
• the heat radiation strikes the infrared sensor 6 arranged around the gas burner 2.
• the heat radiation penetrates the Area of the burner cover 4E, which is formed of an infrared-transparent material, and impinges on the under the burner cover 4E, that is arranged in the burner neck 3 infrared sensor 6D. This is the case with the central dual burner 2D.
• the infrared sensor 6D converts the temperature of the food storage container 30 into an electrical sensor signal which reaches the control module 13 via the signal conductor 12. As soon as the food container 30 has reached a temperature threshold value of 250 ° C., the control module 13 reduces or terminates or switches off the heating power of the corresponding gas hob 1, 1A, 1 B, 1 C, 1 D. Thus, a fire hazard is effectively prevented by overheated pots or pans as Gargut theoreticaler.
• the present invention has been described with reference to embodiments, it is variously modifiable.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Radiation Pyrometers (AREA)
• Control Of Combustion (AREA)

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Citations (7)

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• 2013
  • 2013-10-02 ES ES201331445A patent/ES2533143A1/es not_active Withdrawn
• 2014
  • 2014-09-09 WO PCT/IB2014/064331 patent/WO2015049600A1/de active Application Filing

Patent Citations (7)

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