Gas HOB with a glass-top plate

Abstract

A gas hob comprising a glass top plate (10); a glass cut-out (12) formed as a through-opening in the glass top plate (10); a cup (22) accommodated in the glass cut-out (12) and a burner (20) having a body (25) removably seated in the cup (22); and a burner bezel (40) seated on the upper side (16) of the glass, corresponding to the glass cut-out (12) and having a hole through which the burner body (25) passes), wherein an offset distance (L) is provided between the center (M1) of the glass cut-out and the center (M2) of the burner bezel.

Description

[0001] GAS HOB WITH A GLASS-TOP PLATE

[0002] TECHNICAL FIELD

[0003] The invention relates to a gas hob comprising at least one burner and a glass top plate.

[0004] PRIOR ART

[0005] A gas hob comprises a hob top plate and a burner removably mounted on the top plate on a corresponding through-opening. A pan support (grate) having a flat or voluminous finger structure is disposed on the hob top plate by means of a frame fixed to the frame, so as to surround the burner. The burner generates an upward flame to heat a cooking vessel supported at its base by opposing fingers. In a gas hob where the top plate is made of a metal sheet, the thermal resistance is high, so the flame heating the top plate does not pose a problem. However, where the top plate is made of tempered glass or glass-ceramic, the thermal resistance is relatively lower. Therefore, a heat shield that prevents the flame from heating the top plate is placed on the glass hob top, aligned under the burner, to form a thermal barrier. The heat shield is generally made of a metal plate.

[0006] JP2006010275A discloses to a glass top plate for a gas cooker or similar cooker in which components are shared even when there is a step difference between two adjacent heat sources.

[0007] For example, there is provided a glass top plate that uses a glass plate as an upper plate covering the open upper portion of the cooker body of a gas cooker. This glass top plate has a glass plate fitted to an outer frame, and the glass plate has a plurality of burner openings corresponding to a plurality of gas burners as heat sources. By way of example, as the burner openings, circular holes are provided on the left and right sides arranged side-by-side on the glass plate. The glass top plate is provided beneath the glass plate with a metal back plate parallel to the glass plate, and the back plate likewise has burner openings corresponding to those of the glass plate. A plurality of aligned openings are thus provided. By providing the back plate, light inside the cooker body (e.g., reflected light entering from outside or light from the flame of the gas burner) can pass through the glass plate and be visible above. It is also possible to prevent scattering of glass fragments in the event the glass plate breaks. Each burner opening of the glass plate is provided with a protective cover (protective ring) including a metal upper element (upper ring) and a lower element (lower ring) to protect the edge of the opening.

[0008] SUMMARY OF THE INVENTION

[0009] The object of the invention is to improve the thermal resistance of the glass top plate in gas hobs.

[0010] In order to achieve above objective, the invention provides a gas hob comprising: a glass top plate; a glass cut-out formed as a through-opening in the glass top plate; a cup accommodated in the glass cut-out and a burner having a body removably seated in the cup; and a burner bezel (trim ring) seated on the upper side of the glass, corresponding to the glass cut-out and having a hole through which the burner body passes. An offset distance is provided between the center of the glass cut-out and the center of the burner bezel. Owing to this offset distance, the contact area between the burner bezel and the glass top plate is reduced, enabling the burner bezel to be fixed to the glass top plate using a smaller amount of adhesive.

[0011] In a preferred embodiment, the area of the burner bezel on the glass top plate is larger than the area of the glass cut-out and includes a silicone bonding area between the glass cut-out and the burner bezel. With this structure the burner bezel is fixed to the glass top plate in a heat-resistant manner.

[0012] In a preferred embodiment, the glass cut-out is circular or elliptical. This structure prevents crack formation during cutting.

[0013] In a preferred embodiment, the cup is disposed concentrically with the glass cut-out. Thus, a thermocouple and an igniter to be disposed around the cup are positioned more easily.

[0014] In a preferred embodiment, the offset distance (L) between the centers (M2) of the burner bezel and (M1) of the glass cut-out is in the range of 1 mm to 10 mm. In this way, despite reducing the bonding area, the burner bezel according to the invention can meet the standard thermal resistance compared with larger bezels.

[0015] In a preferred embodiment, the diameter of the glass cut-out is adjusted to accommodate an igniter and a thermocouple coupled to the burner. Thus, a compact structure is obtained. In a preferred embodiment, a carrier plate is provided at the mouth of the cup. Thus, the cup has the structural strength to carry elements such as the thermocouple and the igniter.

[0016] In a preferred embodiment, a holder plate extends radially outward or inward from the cup so as to hold the thermocouple and the igniter. With this structure the cup, thermocouple and igniter form a compact arrangement.

[0017] In a preferred embodiment, the holder plate is adjusted to be provided in the vicinity of the periphery of the glass cut-out together with the thermocouple and the igniter. With this structure the holder plate has the structural strength to carry elements such as the thermocouple and the igniter.

[0018] In a preferred embodiment, the ratio of the area of the side of the cup facing the glass top plate to the area of the corresponding glass cut-out is from 1 :1.01 to 1 :2.9. Thus the cup, thermocouple and igniter are aligned within the glass cut-out.

[0019] In a preferred embodiment, the ratio of the area of the portion of the burner bezel contacting the glass top plate to the area of the corresponding glass cut-out is from 1.01 :1 to 1.53:1. Thus the bonding area is reduced.

[0020] In a preferred embodiment, a grate is seated on a pin placed on the glass top plate. Thus, the load exerted by a cooking vessel placed on the grate is transferred to the glass top plate.

[0021] In a preferred embodiment, a retaining fiber is affixed to the lower wall of the glass top plate. Thus, damage such as cracking of the glass top plate due to thermal stresses is prevented.

[0022] In a preferred embodiment, the side edge of the glass top plate is at least 55 mm away from the outer periphery of the burner. Thus, a distance is provided that prevents damage such as cracking of the glass top plate.

[0023] In a preferred method embodiment, the invention comprises the steps of: supplying a glass top plate; supplying a flat glass top plate; obtaining, by a cutting operation from the glass top plate, a glass cut-out in the form of a through hole of circular or elliptical shape; mounting the cup to the glass top plate so as to be located beneath the glass cut-out; and bonding the burner bezel to the upper side of the glass top plate such that an offset distance is provided between the center of the glass cut-out and the center of the burner bezel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of an exemplary embodiment of a gas hob with a glass top plate according to the invention.

[0025] Figure 2 is a bottom view of the gas hob with the burner head removed, as shown in Figure 1 .

[0026] Figure 3 is a bottom view of the burner bezel and the glass cut-out on the glass top plate.

[0027] Figure 4 is an enlarged view from below of the burner bezel, the glass cut-out, and their centers.

[0028] Figure 5 is an exploded perspective view of the gas hob.

[0029] DETAILED DESCRIPTION OF THE INVENTION

[0030] In this detailed description, the development according to the invention is described without any limitation and only to better explain the subject, with reference to examples.

[0031] Figure 1 shows a top view of a gas hob having a flat rectangular upper plate made of glassceramic. The glass top plate (10) has a straight side edge (13) and a straight bottom edge (11) perpendicular to the side edge (13). On the upper side (16) of the glass top plate (10) there are four burners (20), namely one wok burner, one semi-rapid burner and two small auxiliary burners (20). A burner bezel (40) is disposed on the upper side (16) of the glass top plate (10) so as to be seated and to circumferentially surround the burners (20). A plurality of hob knobs (30) are arranged in a row adjacent to the bottom edge (11) of the glass top plate (10). The gas flow rate of the burners (20) corresponding to each hob knob (30) is adjusted by the respective knob.

[0032] Figure 2 shows from below the gas hob with glass top plate (10) with the burner heads (20) removed. A cup (22) of the wok burner (20) is mounted to the glass top plate (10). The cup (22) has a body and a carrier plate (24) made of metal and cut in a Y-shape. The carrier plate (24) consists of two Y-shaped extensions extending from a flange and facing each other. An igniter (21) is mounted upright on one of the extensions of the carrier plate (24), and a thermocouple (28) is mounted upright on the other. The semi-rapid burner (20) and the other burners (20) are also mounted to the glass top plate (10). In these three burners (20), the thermocouple (28) and the igniter (21) are mounted upright on a holder plate (23) extending radially outward from the cup (22). The area of the portion of the cup (22) facing the glass top plate (10) is 191.8 cm2.

[0033] Figure 3 is a bottom view showing on the glass top plate (10) the burner bezel (40), the glass cut-out (12), and the centers (M1 , M2) of the burner bezel (40) and the glass cut-out (12) provided with an offset relative to each other. The burner bezel (40) used for the wok burner (20) is an oval-like structure flattened at the top, and the burner bezels (40) used for the semi-rapid and the other burners (20) are oval-shaped. The hob knobs (30) are arranged in parallel, aligned with the bottom edge (11), and separated in pairs. The wok burner (20) is placed facing the semi-rapid burner (20), and the other two burners (20) are likewise placed facing each other. A bonding area (14) is provided between the burner bezel (40) and the glass cut-out (12).

[0034] Figure 4 is an enlarged view of the centers (M1 , M2) of the burner bezel (40) and the glass cut-out (12) and the offset distance (L) between the centers. The offset distances (L) in the wok burner (20), the semi-rapid burner (20) and the other burners (20) are adjusted to 10 mm, 5.5 mm, 3 mm and 1 mm, respectively. The center (M2) of the burner bezel is located at the lower left of the center (M1) of the glass cut-out. The area of the portion of the wok burner’s bezel (40) contacting the glass top plate (10) is 579.66 cm2, and the area of its glass cut-out is 453.4 cm2. The area of the portion of the semi-rapid burner’s bezel (40) contacting the glass top plate (10) is 191.8 cm2, and the area of its glass cut-out is 135.42 cm2. The area of the portion of the auxiliary burner’s bezel (40) contacting the glass top plate (10) is 157.39 cm2, and the area of its glass cut-out is 103.31 cm2. The area of the portion of the rapid burner’s bezel (40) contacting the glass top plate (10) is 296.98 cm2, and the area of its glass cut-out is 197.39 cm2.

[0035] The cup areas of the wok, rapid, semi-rapid and auxiliary burners shown in Figure 2 are 299.47 cm2, 92.50 cm2, 54.63 cm2and 36.42 cm2, respectively. Below, Table 1 shows the bonding area values obtained by subtracting the cup area values from the glass cut-out area values given in Table 1. Table 1 shows the area values obtained and the offset distance values. Figure 5 is an exploded perspective view of the gas hob. A pin (19) is placed on the glass top plate (10), and a grate (18) is disposed so as to correspond to the pins (19). A retaining fiber (17) is affixed so as to cover the lower wall of the glass top plate (10).

[0036] Table 1 . Calculated area values and offset distance values

[0037] REFERENCE NUMERALS

[0038] 10 Glass top plate

[0039] 11 Bottom edge

[0040] 12 Glass cut-out

[0041] 13 Side edge

[0042] 14 Silicone bonding area

[0043] 16 Upper side

[0044] 17 Retaining fiber

[0045] 18 Grate

[0046] 19 Pin

[0047] 20 Burner

[0048] 21 Igniter

[0049] 22 Cup

[0050] 23 Holder plate

[0051] 24 Carrier plate

[0052] 25 Body

[0053] 26 Gas injector inlet

[0054] 28 Thermocouple

[0055] M1 Center of glass cut-out

[0056] M2 Center of burner bezel

[0057] L Offset distance

Claims

CLAIMS1. A gas hob comprising: a glass top plate (10); a glass cut-out (12) formed as a through-opening in the glass top plate (10); a cup (22) accommodated in the glass cut-out (12) and a burner (20) having a body (25) removably seated in the cup (22); and a burner bezel (40) seated on the upper side (16) of the glass, corresponding to the glass cut-out (12) and having a hole through which the burner body (25) passes; characterized in that an offset distance (L) is provided between the center (M1 ) of the glass cut-out and the center (M2) of the burner bezel.

2. The gas hob according to claim 1 , wherein the area of the burner bezel (40) on the glass top plate (10) is larger than the area of the corresponding glass cut-out (12), and a silicone bonding area (14) is provided between the glass cut-out (12) and the burner bezel (40).

3. The gas hob according to any of the preceding claims, wherein the glass cut-out (12) is circular or elliptical.

4. The gas hob according to any of the preceding claims, wherein the cup (22) is arranged concentrically with the glass cut-out (12).

5. The gas hob according to any of the preceding claims, wherein the offset distance (L) between the centers (M2) of the burner bezel (40) and (M1) of the glass cut-out (12) is in the range of 0,1 mm to 10 mm.

6. The gas hob according to any of the preceding claims, wherein the diameter of the glass cut-out (12) is adjusted to accommodate an igniter (21 ) and a thermocouple (28) coupled to the burner (20).

7. The gas hob according to any of the preceding claims, wherein a carrier plate (24) is provided at the mouth of the cup (22).

8. The gas hob according to claim 7, wherein a holder plate (23) extends radially outward or inward from the cup to hold the thermocouple (28) and the igniter (21 ).

9. The gas hob according to any of claims 7-8, wherein the holder plate (23) is adjusted to be provided in the vicinity of the periphery of the glass cut-out (12) together with the thermocouple (28) and the igniter (21).

10. The gas hob according to any of the preceding claims, wherein the ratio of the area of the portion of the cup (22) facing the glass top plate (10) to the area of the corresponding glass cut-out (12) is from 1 :1 ,01 to 1 :2,9.11 . The gas hob according to any of the preceding claims, wherein the ratio of the area of the portion of the burner bezel (40) contacting the glass top plate (10) to the area of the corresponding glass cut-out (12) is from 1 ,01 :1 to 1 ,53:1.

12. The gas hob according to any of the preceding claims, wherein a grate (18) is seated on a pin (19) placed on the glass top plate (10).

13. The gas hob according to any of the preceding claims, wherein a retaining fiber (17) is affixed to the lower wall of the glass top plate (10).

14. The gas hob according to any of the preceding claims, wherein the side edge (13) of the glass top plate (10) is at least 55 mm away from the outer periphery of the burner (20).

15. A method of manufacturing a gas hob according to any of the preceding claims, characterized by the steps of supplying a flat glass top plate (10); obtaining, by a cutting operation from the glass top plate (10), a glass cut-out (12) in the form of a through hole of circular or elliptical shape; mounting the cup (22) to the glass top plate (10) so as to be located beneath the glass cut-out (12); and bonding the burner bezel (40) to the upper side (16) of the glass top plate (10) such that an offset distance is provided between the center (M1) of the glass cut-out and the center (M2) of the burner bezel (40).

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