EP2696143A2 - Kochfeld mit Dichtungselement - Google Patents

Kochfeld mit Dichtungselement Download PDF

Info

Publication number: EP2696143A2
Authority: EP; European Patent Office
Prior art keywords: hob; burner; sealing element; tray; flange
Prior art date: 2012-08-06
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.): Granted

Application number

EP13177011.7A

Other languages

English (en)

French (fr)

Other versions

EP2696143A3 (de

EP2696143B1 (de

Inventor

Emrah Atabay

Serdar Kenar

Yusuf Kocaman

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

BSH Hausgeraete GmbH

Original Assignee

BSH Bosch und Siemens Hausgeraete GmbH

Priority date (The priority date 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 date listed.)

2012-08-06

Filing date

2013-07-18

Publication date

2014-02-12

2013-07-18 Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH

2014-02-12 Publication of EP2696143A2 publication Critical patent/EP2696143A2/de

2014-08-20 Publication of EP2696143A3 publication Critical patent/EP2696143A3/de

2018-03-07 Application granted granted Critical

2018-03-07 Publication of EP2696143B1 publication Critical patent/EP2696143B1/de

Status Active legal-status Critical Current

2033-07-18 Anticipated expiration legal-status Critical

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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
- F24C3/08—Arrangement or mounting of burners
- F24C3/085—Arrangement or mounting of burners on ranges

Definitions

the invention concerns a hob which comprises a hob tray with a burner opening and a seal element located between the burner accessed through the burner opening and the hob tray.
the heads of gas burners in the state of the art are positioned so that they pass through burner openings created in a hob tray or are at least accessible through the opening.
a gas distributor which ensures the distribution of gas and the mixing of the gas and air, and also the cap.
a sealing element is positioned between the burner and the hob tray.
the gas distributor and the burner are usually brought together by a connecting element (a screw etc). In this fashion, the seal element is compressed between the hob tray and the burner in order to ensure a seal.
no screw or similar connection element is used.
the sealing element is passed over the burner head in a tensioned state to provide a seal and the free edges of the sealing element bear against the burner flange.
the sealing element may be moved out of place.
the lifting edges of the sealing element, or a sealing element which has moved out of place becomes lodged between the flange and the hob tray in an unacceptable manner.
the purpose of the invention is to ensure that a sealing element positioned on the burner flange stays in place on the flange so that it provides a seal.
the invention is a hob which includes a hob tray; a burner opening provided in the hob tray; a burner positioned under the hob tray so that it can be accessed through the burner opening; a flange provided on the burner below the hob tray; a circumferential sealing element which includes a soft synthetic material positioned around the burner between the flange and the hob tray; an acute angle presented to the flange between the burner and the inner wall of the sealing element which comes into contact with the burner to form a seal.
the sealing element which is in contact with the burner in a tensioned fashion in order to provide a seal, moves in the direction of the flange. This safeguards the positioning of the sealing element ready in position on the flange.
a sealing element with a circumferential sealing projection which firmly positions the sealing element on the flange by reason of the weight of the hob tray bearing upon it.
the sealing projection in a preferred embodiment of the invention, there is a seal area defined by the upper periphery of the sealing projection and the inner lower periphery which contacts the underside of the hob tray in a manner which provides a seal and also supports the hob tray. Contact with the underside of the hob tray is thus provided at all times throughout the entire circumference of the sealing extension.
the sealing projection has a shape which provides an acute angle between the underside of the hob tray and the seal area.
the sealing projection may have a shape which is an inverted U form in section, or a Z form in section which extends away from the burner, at an obtuse angle, or a straight form which extends away from the burner at an obtuse angle.
the sealing projection continually receives the force imposed by reason of the weight of the hob tray in the direction from the center of the sealing element toward the outside.
it does not transition from a resting volume to a form with a smaller volume, it does not cause problems such a buckling or rippling, and is in contact with the hob tray at all times. In this way it provides a seal.
the sealing projection in the straight section form, has a shape which, in section, becomes thicker toward the junction point. This ensures that the sealing element the sealing projection is continually trying to attain its former position under the force applied in the opposite direction to the center of the sealing element. This ensures that continuous contact with the hob tray is maintained. The thickening ensures that the force applied by the sealing projection against the hob tray will be more long-lasting. This will ensure that the sealing element has a long service life.
the sealing element includes an aperture, in a sealed position, for items such as the burner igniter or the flame control element.
the sealing element includes an elastic material.
any variations in the shape or gap in the hob tray and/or burner will be compensated for. Because such variations are compensated for, a persistent seal is ensured.
the fact that the sealing projection is made of flexible material ensures that the sealing projection tries to retain its shape despite the force imposed by the hob tray. This ensures that continuous contact with the hob tray is maintained despite any such variations. Also because it is elastic, sealed contact with the inner wall in the burner hole is ensured.
the sealing element includes heat-resistant material. This will ensure that the sealing element has a long service life in hobs which operate at high temperatures.
the sealing element includes a material with a Shore hardness value of between 30 and 60. This ensures flexibility and durability which will assist in achieving the objectives referred to above.
the invention concerns a hob (10) ( figure 1 ) which includes a hob tray (12), a burner opening (16) provided in the hob tray (12); a burner (20) positioned under the hob tray (12) so that it can be accessed through the burner opening (16); a flange (22) provided on the burner (20) below the hob tray (12); a circumferential sealing element (30) which includes a soft synthetic material positioned around the burner (20) between the flange (22) and the hob tray (12).
the special property of the invention is the presence of an acute angle (34) presented toward the flange (22) between the burner (20) and the inner wall (33) of the sealing element (30) which comes into contact with the burner (20) to form a seal. ( figure 3 ).
the hob (10) used in the invention is preferably a gas hob which may be separate or attached to a cooker. It is equipped with one or more cooking sections. In each cooking section there is one burner (20) which may be of a variety of sizes. The burner (20) rests on support points provided on a hob under the tray located under the hob tray (12) and the connection pipes are fitted to the gas source. The support points prevent the burner (20) from moving downwards in a vertical direction when a load is imposed upon it.
the hob tray (12) is positioned on the burners (20).
the hob tray (12) is fixed to the side walls of the hob (11) at its own periphery or on the side walls of the domestic appliance such as a cooker. For this reason the burner (20) and the cooker tray (12) are separate from each other.
the sealing element (30) is roughly hoop-shaped, as in the state of the art.
a burner head (24) is located in the burner hole (32).
the sealing element (30) is located on a flange (22) which is a disk surrounding the burner head (24).
the flange (22) and the sealing element (30) are located under the hob tray (12).
the inner wall (33) of the burner hole comes into contact with the burner head (24) to form a seal. Because of the acute angle (34) described above, the upper periphery (331) of the inner wall (33) which is distant from the flange (22) comes into contact with the burner head (24).
the intention is to bring the lower periphery (332) close to the flange (22) of the sealing element (30) which is positioned on the burner head (24) under tension into contact with the burner head (24).
the body of the sealing element (30) which covers the upper surface of the flange (22) is thus drawn downward in the direction of the flange (22). Since the sealing element (30) when first positioned is already positioned in contact with the flange (22), because of the tendency toward downward movement referred to, it continues to sit on the flange (22). It does not attempt to move upward and separate from the burner head, as occurs in the state of the art.
the sealing element (30) is positioned on the burner (20) before the hob tray (12) is fixed. Since the igniter and flame control elements pass through in an area within the perimeter of the sealing element (30), there are one or more apertures (35).
the side of the sealing element (30) which faces the flange (22) also contains a centering lip (38) which passes round the entirety of the burner hole (32).
the centering lip (38) is preferably on the periphery of the burner hole (32) and projects downward toward the flange (22). It is preferably at an angle of 90 degrees to the underside of the sealing element (30).
the centering recess (23) is preferably located at the point where the burner head (24) and the flange (22) meet.
the value of the acute angle (34) which is the subject of the invention may also be determined by the centering lip (38).
the acute angle (34) is preferably at a value which permits the creation of a centering lip (38). If the acute angle (34) is close to 90 degrees, then the lower periphery (332) of the inner wall (33) will lie behind the centering recess (23). A centering lip (38) cannot them be provided. But the absence of a centering lip (38) does not negatively affect the principal purpose of this patent, and therefore the embodiment according to claim 1 without the centering lip (38) is adequate for the invention.
the sealing element (30) includes a circumferential sealing projection (40) which serves to settle the sealing element (30) onto the flange (22) with the weight of the hob tray (12) ( figure 2 ).
the sealing projection (40) preferably extends towards the hob tray (12) from the upper surface (36) of the sealing element (30) which faces the hob tray (12).
the sealing projection (40) forms a boundary which includes the burner hole (32) and the apertures (35) ( figure 4 ).
a preferred embodiment of the sealing projection (40) is straight in section. However, it does not extend toward the hob tray (12) at a right angle.
the straight section sealing projection (40) extends away from the burner (20) forming an obtuse angle (B) with the upper surface (36) of the sealing element.
the obtuse angle (B) can be at any angle, preferably between 90 and 180 degrees.
the obtuse angle (B) in its preferred embodiment, is between 90 and 135 degrees.
the sealing projection (40) becomes to a certain extent thicker toward the point at which it meets the upper surface of the sealing element (30) ( figure 4 ).
the sealing projection (40) is able to stand at the angle referred to above when no force is applied to it. Also, when force is applied to it, it provides a counterforce in the opposite direction to the applied force.
the seal area (46) is preferably defined by the upper periphery (42) and the lower periphery (44) of the sealing projection (40). That is, the surface lying between the two peripheries (42, 44), taking in the points formed by the upper periphery (42) of the sealing projection (40) and its inner lower periphery (44), constitutes the seal area (46). Depending on the load applied to it, the whole of the seal area (46) or part of it will be in contact with the hob tray (12).
the sealing projection (40) is inclined, and therefore when a load is applied to it by the hob tray (12), it bends in the direction in which it is inclined, depending on the intensity of the load applied ( figure 3 ).
A an acute angle between the underside (14) of the hob tray (12) and the seal area (46). If the burner (20) and the hob tray (12) are not parallel with one another, the sealing projection (40) will be deflected less in one area less, and more in another area. But it will maintain its contact with the hob tray (12) at all times. This provides a seal.
the cross section of the sealing projection (40) forms an inverted U ( figure 4a ).
the arms of the U shape spread out towards their junction point with the sealing element (30).
a wall extending at an obtuse angle (B) is provided in the opposite the burner (20). This wall creates an acute angle (A) with the underside of the hob tray (12) in order to create the seal area (46) which has been mentioned.
the sealing projection (40), in section, forms a zigzag.
the zigzag configuration comprises three arms roughly in a Z shape ( figure 4b ).
the arm which forms the free end of the Z shape has an obtuse angle pointing away from the burner (20).
a wall extending at an obtuse angle (B) is provided pointing away from the burner (20). This wall also creates an acute angle with the underside of the hob tray (12) in order to create the seal area (46) which has been mentioned.
the sealing projection (40) has an upper periphery (42) and an inner lower periphery (44).
the sealing element (30) includes elastic and/or heat-resistant material with a Shore hardness valued of between 30 and 60.
the sealing element (30) includes silicone.

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Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Gas Burners (AREA)
Endoscopes (AREA)

EP13177011.7A 2012-08-06 2013-07-18 Kochfeld mit Dichtungselement Active EP2696143B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
TR201209135		2012-08-06

Publications (3)

Publication Number	Publication Date
EP2696143A2 true EP2696143A2 (de)	2014-02-12
EP2696143A3 EP2696143A3 (de)	2014-08-20
EP2696143B1 EP2696143B1 (de)	2018-03-07

Family

ID=48803421

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP13177011.7A Active EP2696143B1 (de)	2012-08-06	2013-07-18	Kochfeld mit Dichtungselement

Country Status (2)

Country	Link
EP (1)	EP2696143B1 (de)
ES (1)	ES2665529T3 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4133409C2 (de) *	1991-10-09	1993-10-21	Schott Glaswerke	Brenneranordnung
DE19733242C1 (de) *	1997-08-01	1998-10-15	Schott Glas	Gas-Kochfeld mit einem plattenförmigen Formkörper aus sprödbrüchigem Material
FR2777559B1 (fr) *	1998-04-16	2000-07-13	En Nom Collectif Eurokera Soc	Fabrication de plaques vitroceramiques a ouverture(s) au pourtour deforme ; plaques vitroceramiques deformees
US6173708B1 (en) *	1999-11-15	2001-01-16	Maytag Corporation	Gas burner mounting assembly for appliance with ceramic based cooktop
JP4327997B2 (ja) *	2000-06-28	2009-09-09	株式会社ハーマンプロ	ガスコンロの天板とバーナとの間のシール構造

2013
- 2013-07-18 EP EP13177011.7A patent/EP2696143B1/de active Active
- 2013-07-18 ES ES13177011.7T patent/ES2665529T3/es active Active

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number	Publication date
EP2696143A3 (de)	2014-08-20
EP2696143B1 (de)	2018-03-07
ES2665529T3 (es)	2018-04-26

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