Cooking hob

Abstract

The present invention relates to a cooking hob (1) comprising a support element (10) having an upper surface (11) and a lower surface (12); at least one cooking zone (13) configured to house one or more heating elements (14) at said upper surface (11); a suction opening (20) for sucking cooking fumes; a suction duct (30) placed in fluid communication with said suction opening (20), and having a base wall (31) spaced from the lower surface (12) along a spacing direction (X-X) and a side wall (32) extended between the base wall (31) and the lower surface (12); suction means associated with said suction opening (20) and configured to suck the cooking fumes through said suction opening (20) and said suction duct (30); a filter (50) configured to filter the sucked cooking fumes and arranged in a removable manner at least in part inside the suction duct (30), said filter (50) being extended between a first end portion (51) configured to engage the support element (10) at the suction opening (20) and a second end portion (52) configured to engage fluid-tightly with the base wall (31).

Description

[0001] Title: "Cooking hob

[0002] DESCRIPTION

[0003] Technical field

[0004] The present invention relates to a cooking hob, in accordance with the preamble of Claim 1.

[0005] Particularly, but not exclusively, the present invention relates to a cooking hob that integrates a hood of the type commercially known as a retractable or down-draft hood.

[0006] State of the art

[0007] The hoods for domestic environments are now installed in all kitchens in homes, as their usefulness, in the suction of aeriforms caused by the preparation of dishes, i.e. the vapours originating from cooking, is now undisputed. It is therefore increasingly important to have hoods for domestic environments that are actually able to eliminate the cooking vapours that are produced during the food preparation phases and treat these vapours in the correct way.

[0008] For this purpose, hoods have been developed capable of both sucking and discharging the air taken in outside the home through a suction unit and filtering it and reintroducing it into the domestic environment.

[0009] Among the various hoods offered on the market there are also the so-called downdraft hoods, which are often integrated into a cooking hob or alternatively in the top of a kitchen cabinet. In particular, the down-draft hood is configured to generate a descending current higher than the ascending speed of the cooking vapours in such a way that said vapour is sucked towards the cooking hob itself in a downward vertical direction.

[0010] An example of these downdraft hoods, particularly integrated into a cooking hob, is illustrated in patent IT 102016000034820, by the same Applicant.

[0011] This document discloses a cooking hob comprising a support. This support has an upper surface and a lower surface. On the upper level there are defined cooking zones that are intended to accommodate a heating element. The support element is provided with a suction opening for the suction of cooking fumes. The cooking hob also comprises a suction duct, in fluid communication with the suction opening. A centrifugal fan is in fluid communication with the suction opening, and in particular has an inlet gap in fluid communication with the suction duct. The fan expels the fumes through an outlet duct. A motor is associated with the centrifugal fan to put it in rotation.

[0012] For the treatment of the cooking fumes, the downdraft hood of the prior art provides a first filter, usually consisting of a metal grille, adapted to facilitate the condensation of suspended liquid or semi -liquid particles, such as grease, in the cooking fumes. This first filter may be coupled to a second filter adapted to absorb odours from the cooking fumes and may comprise one or more filtering elements, generally with activated carbons.

[0013] Specifically, these filters can be arranged immediately downstream of the suction opening obtained on the cooking hob and suspended inside the suction channel. In this way, the cooking fumes sucked in by sequentially encountering the first and second filters release liquid or semi-liquid cooking residues, such as water, oil, grease etc., which pass through the suction opening. Such substances can fall on the bottom of the suction channel which can be emptied by means of relative extraction means or alternatively in an extractable collection vat.

[0014] Problems of the background art

[0015] Disadvantageously, suspended filters for cooking fumes, during suction, do not make it possible to effectively treat the cooking fumes once sucked and directed into the suction channel.

[0016] In addition, suspended filters cause an uneven distribution of the sucked cooking fumes, causing not only pressure drops with a reduction in the suction efficiency, but also a dispersion on the walls of the suction channel and inside the impeller of the residues present in the improperly filtered cooking fumes. This entails the need for more frequent cleaning and maintenance as well as an increase in costs for the energy spent on suction.

[0017] Document WO2012 / 146237 describes a cooking hob in which the suction duct has a base surface provided with a lowered central region defining a "basin" for the collection of liquids. This cooking hob also comprises a filter, the end of which is inserted into said basin.

[0018] It should be noted that in the cooking hob described in WO2012 / 146237 it is the geometry of the central region of the base surface of the suction duct that allows the liquid to be retained and not the type of coupling that this makes with the filter. As confirmation of this, it is noted that, even with an extracted filter, the lowered central region of the base surface is able to retain liquids. Therefore, document WO2012 / 146237 does not teach, either explicitly or implicitly, making a fluid-tight coupling between the filter and the base surface of the suction duct.

[0019] Summary of the invention

[0020] The object of the present invention is to overcome the drawbacks set forth with reference to the prior art, and in particular to provide a cooking hob capable of effectively filtering the cooking fumes. A further object of the present invention is to provide a cooking hob capable of improving the suction efficiency during the filtering of the sucked cooking fumes.

[0021] These and other objects are achieved by the cooking hob according to any one of the appended claims.

[0022] Advantages of the invention

[0023] Advantageously, the cooking hob of the present invention allows the spaces available inside the suction channel to be fully exploited in order to increase the contact surface between the sucked fumes and the filter. In this way, the cooking hob of the present invention makes it possible to remove a higher number of residues present in the cooking fumes.

[0024] Advantageously, the cooking hob of the present invention allows the sucked and correctly filtered cooking fumes to be directed towards the impeller for subsequent ejection, reducing pressure drops.

[0025] Advantageously, the cooking hob of the present invention makes it possible to reduce the cleaning and maintenance rate as well as facilitating and speeding up the cleaning of the cooking hob itself.

[0026] Further features and advantages of the invention will be clear to a person skilled in the art from the following detailed disclosure of exemplary embodiments of the invention.

[0027] Brief disclosure of the figures

[0028] For a better understanding of the following detailed disclosure, some embodiments of the invention are illustrated in the accompanying drawings, wherein:

[0029] - Figure 1 shows a sectional view of a cooking hob of the present invention;

[0030] - Figure 2 shows a partially exploded perspective view of the cooking hob of Figure 1;

[0031] - Figure 3 shows a sectional view of a filter in accordance with the present invention;

[0032] - Figure 4 shows an exploded view of a first part of the filter of Figure 3; - Figure 5 shows an exploded view of a second part of the filter of Figure 3;

[0033] - Figure 6 shows a sectional view of a part of the filter in accordance with a further embodiment of the present invention.

[0034] DETAILED DESCRIPTION

[0035] Even if not explicitly highlighted, the individual features described with reference to the specific embodiments shall be understood as accessory to and / or interchangeable with other features described with reference to other embodiments.

[0036] With reference to the enclosed figures, 1 refers to a cooking hob according to the present invention.

[0037] The cooking hob 1 comprises a support element 10 having an upper surface 11 and a lower surface 12. In particular, when the cooking hob 1 is installed, the upper surface 11 of the support element 10 is the side that is visible to or can be seen by the user while the lower surface 12 is the side that is hidden from the user's view, for example because it is recessed in the kitchen cabinets.

[0038] According to one aspect, the support element 10 therefore defines a suitable volume that can contain the necessary components to perform the control and heating / cooking function of the dishes as well as the suction of the cooking vapours. Further electronic components can be accommodated in compartments associated with the support element on the side of the lower surface 12.

[0039] In one embodiment, the upper surface 11 is embodied in a plate (not illustrated) of glass or material having similar properties.

[0040] According to a preferred aspect, both the upper surface 11 and the lower surface 12 are embodied in flat and parallel surfaces and opposite each other.

[0041] The cooking hob comprises at least one cooking zone 13 configured to accommodate one or more heating elements (not illustrated) at the upper surface 11. With reference in particular to figure 2, a plurality of cooking zones 13 can be identified on the upper surface 11. In this case, the cooking zones 13 are suitably distributed on the upper surface 11 of the support element 10 and, in particular, are arranged to radiate heat, in the case of resistive heating elements, or to induce heat generation inside special cooking vessels in the case of inductive heating elements.

[0042] Preferably, there are four cooking zones 13, but different alternative embodiments are possible, wherein there is a higher or lower number of cooking zones 13.

[0043] In accordance with a preferred embodiment, the support element 10 also has a cavity 14 extended substantially between the upper surface 11 and the lower surface 12. Preferably, the cavity 14 is positioned in the barycentric zone with respect to the position of the cooking zones 13. In the illustrated embodiment, the cavity 14 extends from the upper surface 11 to near the lower surface 12.

[0044] The cooking hob 1 comprises a suction opening 20 for sucking cooking fumes. Preferably, the suction opening 20 is located at the cavity 14. In accordance with a preferred embodiment, the suction opening 20 is circular in shape, and is protected by a grille or a movable element (not illustrated). Preferably the grille or the movable element is removable so as to allow maintenance operations to be carried out.

[0045] The grille and the movable element have a safety function as they make it possible to avoid the introduction of foreign elements inside the suction opening 20.

[0046] The cooking hob 1 also comprises a suction duct 30, in fluid communication with the suction opening 20.

[0047] The suction duct 30 has a base wall 31 spaced from the lower surface 12 along a transverse spacing direction X-X, preferably perpendicular to the lower surface 12. The suction duct 30 further comprises a side wall 32 extended between the base wall 31 and the lower surface 12.

[0048] The cooking hob 1 also comprises suction means (not illustrated) associated with the suction opening 20 and preferably arranged inside the suction duct 30. In particular, the suction means are configured to suck cooking fumes through the suction opening 20 and the suction duct 30 and then expel them.

[0049] In accordance with a preferred embodiment, the suction means comprise a centrifugal impeller having an inlet opening and a delivery screw. The inlet opening is in fluid communication with the volume defined by the suction duct 30. Preferably, the suction means further comprise a motor associated with the centrifugal impeller to put it in rotation. In particular, the motor is mechanically coupled to the centrifugal impeller, for example by means of a direct mechanical coupling between the rotor of the motor and the hub of the centrifugal impeller.

[0050] More in detail, the cooking hob 1 comprises connection means (not illustrated) active between the motor, the support element and the suction duct, in particular at the lower surface 12. These connection means may comprise a plurality of screws (not illustrated) and an equal number of holes (not illustrated) obtained on the lower surface 12 of the support element 10. In alternative embodiments, the screws can be replaced by any similar fixing element known to the person skilled in the art, such as, by way of example, rivets, welds, glue or others.

[0051] In accordance with the preferred embodiment also with reference to figures 1 and 2, the cooking hob 1 comprises a filter 50 configured to filter the sucked cooking fumes.

[0052] In a preferred embodiment, the filter 50 is arranged in a removable manner at least partially inside the suction duct 30 and is extractable from the cavity 14 so as to allow the user to carry out normal maintenance operations, such as cleaning or replacement.

[0053] According to one aspect, during extraction / insertion the filter 50 passes through the suction opening 20.

[0054] Preferably, the filter 50 is arranged at least in part in the cavity 14 and the remaining part within the suction duct 30.

[0055] The filter 50 extends between a first end portion 51 configured to engage the support element 10 at the suction opening 20 and a second end portion 52 configured to engage flui d-tightly with the base wall 31.

[0056] In particular, the filter 50 extends between the relative opposite end portions 51, 52 along a development direction A-A substantially parallel to the spacing direction X- X. In this way, the first end portion 51 is identifiable as the portion closest to the suction opening 20, i.e. it is identifiable as the upper portion, while the second end portion 52 is identifiable as the portion closest to the base 31, i.e. it is identifiable as the lower portion.

[0057] In accordance with a preferred embodiment, the filter 50 is axially-asymmetric and its axis of symmetry extends between the first end portion 51 and the second end portion 52. In use, therefore, the axis of symmetry is vertical or orthogonal to a floor level.

[0058] In other words, in the preferred embodiment the filter 50 is shaped as a hollow cylinder extended along the spacing direction X-X.

[0059] As anticipated, the filter 50 is shaped so as to provide a fluid tightness between the base 31 and the lower end 52 at the end 52 itself. By means of this feature, the filtering surface is maximized since the spacing between the lower surface 12 and the base wall 31 is exploited in its entirety (i.e. over its entire distance). Furthermore, any liquids that overflow through the opening 20 are prevented from flowing downstream of the filter 50.

[0060] In particular, the filter 50 comprises one or more grease filters 53 and one or more odour filters 54 in order to filter the sucked cooking fumes and reduce odour dispersion.

[0061] It should be noted that the grease filter 53 is made of one or more stretched metal grilles or other material having similar characteristics, while the odour filter 54 is made of a porous material capable of filtering the sucked cooking fumes.

[0062] According to an advantageous aspect, the grease filter 53 and the odour filter 54 are arranged in series, i.e. in such a way that the sucked vapours first pass through the grease filter 53 and subsequently through the odour filter 53.

[0063] In the preferred embodiment, the grease filter 53 and the odour filter 54 are axially-asymmetric along the direction X-X, and in particular shaped like a hollow cylinder.

[0064] According to a particular aspect of the present disclosure, the grease filter 53 and the odour filter 54 are cylinders without base surfaces, i.e. they have neither the upper base nor the lower base. In other words, the grease filter 53 and the odour filter 54 are formed as a hollow cylinder without both base surfaces. In other words, the grease filter and the odour filter 53, 54 have a tubular shape, i.e. a cylindrical shape open at the top and bottom (i.e. open at its base ends).

[0065] In accordance with a preferred embodiment, the filter 50 comprises a first filter holder frame 70 defining a first filtering channel 71 extended between the first and second end portions 51, 52.

[0066] The filtering channel 71 has a first filtering opening 72 in fluid communication with the suction opening 20, a second opposite filtering opening 73 and a first filtering wall 74 defining the relative filtering openings 72, 73 and configured to place in fluid communication the suction opening 20 and the suction duct 30.

[0067] The first filter holder frame 70 is configured to house the one or more grease filters 53 defining the first filtering wall 74.

[0068] Preferably, the first filter holder frame 70 comprises a base element 75 and a head element 76 that can be coupled to house and retain the one or more grease filters 53 between them.

[0069] Specifically, the base element 75 and the head element 76 comprise relative housings 77 configured to receive and retain opposite end portions 53 a, 53b of the one or more grease filters 53.

[0070] It should be noted that the base element 75 and the head element 76 define the second and first filtering openings 73, 72 respectively.

[0071] In accordance with a preferred embodiment, the filter 50 comprises a second filter holder frame 80 defining a second filtering channel 81 extended between the first and second end portions 51, 52. The second filtering channel 81 has a third filtering opening 82 in fluid communication with the suction opening 20, an opposite fourth filtering opening 83 plugged by the base wall 31 and a second filtering wall 84 defining the relevant filtering openings 82, 83 and configured to place in fluid communication the first filtering channel 74 and the suction duct 30.

[0072] Specifically, the fourth filtering opening 83 is closed by the base wall 31 forcing the cooking fumes sucked from the suction opening 20 to pass in series from the first filtering wall 74 and the second filtering wall 84.

[0073] Advantageously, the filter 50 makes it possible to exploit the entire extension of the first and second filtering wall 74, 84 for the correct filtering of the sucked cooking fumes.

[0074] It should be noted that the second filter holder frame 80 is configured to house the one or more odour filters 54 defining the second filtering wall 84.

[0075] Preferably, the second filter holder frame 80 comprises an inner frame 85 and an outer frame 86 that can be coupled to the inner frame 85 to hold the one or more odour filters 54. In accordance with a preferred embodiment, the outer frame 86 surrounds the inner frame 85. According to one aspect, the outer frame 86 can be divided into multiple parts that can be coupled to the inner frame 85 by coupling means 88 such as screws and / or interlocking systems.

[0076] Specifically, the inner frame 85 and the outer frame 86 define between them second housings 87 configured to receive the one or more odour filters 54. It should be noted that the inner frame 85 defines at the opposite ends 85 a, 85b respectively the fourth and third filtering openings 83, 82.

[0077] Preferably, the first filter holder frame 70 is configured to be arranged inside the second filter holder frame 80, specifically inside the second filtering channel 81.

[0078] More preferably, the first and the second filtering channel 71, 81 are coaxial when the first filter holder frame 70 is inserted into the second filtering channel 81 of the second filter holder frame 80.

[0079] In accordance with a preferred embodiment, the filter 50 comprises at the second end portion 52 a gasket element 60, preferably surrounding the second filtering opening 83.

[0080] As shown in figure 1, the gasket element 60 is configured to abut against the base wall 31 to make a sealed connection with the latter. In use, when the gasket 60 abuts against the base 31, the second filtering opening 83 is hermetically closed by the base wall 31.

[0081] Advantageously, the gasket 60 causes the sucked vapours to be conveyed on the first and second filtering walls 74, 84 since the filter n50 as a whole is sealed to the base wall 31.

[0082] In accordance with the preferred embodiment, the gasket 60 is associated with the second filter holder frame 80.

[0083] Specifically, the inner frame 85 comprises a seat 87 at the end 85b on the side of the second end portion 53 for housing the gasket 60 at least in part protruding from said seat 87. In this way, the filter 50, once positioned inside the suction channel 30, engages the base wall 31 by means of this gasket 60 ensuring its tightness and therefore preventing the passage of the sucked fumes and thus conveying them towards the filtering openings 74, 84.

[0084] Alternatively, the gasket 60 may be arranged in a respective seat formed in the base wall 31 and configured to receive and engage the filter 50 at the second end portion 52.

[0085] According to one aspect, the filter 50 comprises first coupling members 90 configured to removably fix between them the first filter holder frame 70 and the second filter holder frame 80.

[0086] Preferably, the first coupling members 90 provide a shape coupling between the first and second filter holder frame 70, 80. In particular, the inner frame 85 at the end 85a at the first end portion 51 is shaped to create the shape coupling with the head element 75 of the first frame 70. More preferably, the inner frame 85 at the end 85a and the head element 75 have an inverted truncated conical shape to facilitate the suction of the cooking fumes.

[0087] Alternatively or in combination, the first coupling members 90 comprise first coupling elements and second coupling elements defined respectively on the first and second filter holder frame 70, 80 and configured to mutually couple through interlocking following a movement along the spacing direction X-X and / or following a rotation around said spacing direction X-X.

[0088] Alternatively or in combination, the first coupling members 90 may comprise third coupling elements configured to retain the first and second coupling elements together for example by screw-nut screw coupling.

[0089] According to a further aspect, the filter 50 comprises second coupling members 100 configured to removably fix the first filter holder frame 70 or the second filter holder 80 to the support element 10.

[0090] Preferably, the second coupling members 100 provide a shape coupling between the support element 10 and the first end 51 of the filter 50.

[0091] Specifically, the first end 51 is shaped to create the shape coupling with the cavity 14.

[0092] Alternatively, the second coupling members 100 comprise first fixing elements and second fixing elements defined respectively on the support element 10 and on the filter 50, selectively on the first or on the second filter holder frame. Said fixing elements are configured to mutually couple through interlocking following a movement along the spacing direction X-X and / or following a rotation around this spacing direction X-X. Alternatively, the second coupling members 100 may comprise third fixing elements configured to retain the first and second fixing elements to each other such as for example by screw-nut screw coupling.

[0093] According to a characteristic aspect of the present disclosure, the fluid-tight sealing gasket 60 delimits a first collection volume 120 designed to collect at least in part liquids flowing through the suction opening 20 itself and filtrated.

[0094] In particular, such liquids can be collected in the first collection volume 120 as they are sucked by the suction means with the cooking fumes or can be sucked (or even not sucked) by the suction means following their overflow from the containers, for example, dedicated to cooking food.

[0095] For example, such liquids may be water, water vapour and / or water mixed with oil and / or grease.

[0096] Said first collection volume 120 is configured to retain a predetermined amount of liquid after which the overflow is provided outside the second filtering channel 81 and the distribution of the liquid inside the suction duct 30 on the base wall 31.

[0097] Preferably, the suction duct 30 comprises discharge members (not illustrated) that allow the overflow of liquid to be discharged from the suction duct. These discharge members may comprise a hole formed in the suction duct and a selectively removable closure element to discharge the accumulated liquid.

[0098] Specifically, the first collection volume 120 is delimited by the filter 50 which defines a collection barrier 121 extending from the base wall 31 and from a portion 122 of the base wall 31 circumscribed by the filter 50. It should be noted that this collection barrier 121 is defined by the base element 75. Alternatively, said collection barrier 121 is defined by the combination of the inner 85 and outer 86 frame at the end 85b.

[0099] In accordance with an alternative embodiment to the previous one, and combinable therewith, the first filter holder frame 70 comprises a collection vat 110 configured to collect liquids present in the sucked cooking fumes. This collection vat 110 is retained to the first filter holder frame 70 at the second opening 73.

[0100] Preferably, the collection vat 110 comprises a collection tray 111 and a containment wall 112 extended from the collection tray 112 and spaced from the first filter holder frame 70 to define a collection area 113 within the first and second filtering channels 74, 84.

[0101] This collection area 113 is external to the collection vat 110. In detail, the containment wall 112 has a perforated connection edge 114 configured to removably connect the collection vat 110 to the first filter holder frame 70 and to drain the liquids from the collection vat 110 to the collection area 113.

[0102] Specifically, the connecting edge 114 comprises a plurality of holes circumferentially spaced apart from each other. It should be noted that this collection area 113 is defined within the first collection volume 120. The liquids collected inside the collection vat 110 once past the containment wall 112 overflow into the collection area 113. The filling of the collection area substantially corresponds to the filling of the collection volume 120 with the consequent overflow outside the filter 50 on the base wall 31 as previously described. Clearly, in order to satisfy contingent and specific needs, a person skilled in the art may make numerous modifications and variants to the configurations described above. Such modifications and variations are all encompassed by the scope of protection of the invention, as defined by the following claims.

Claims

CLAIMS1. Cooking hob (1) comprising:- a support element (10) having an upper surface (11) and a lower surface (12);- at least one cooking zone (13) configured to house one or more heating elements at said upper surface (11);- a suction opening (20) for sucking cooking fumes;- a suction duct (30) placed in fluid communication with said suction opening (20), and having a base wall (31) spaced from the lower surface (12) along a spacing direction (X-X) and a side wall (32) extended between the base wall (31) and the lower surface (12);- suction means associated with said suction opening (20) and configured to suck the cooking fumes through said suction opening (20) and said suction duct (30); characterized in that it comprises a filter (50) configured to filter the sucked cooking fumes and arranged in a removable manner at least in part inside the suction duct (30), said filter (50) being extended between a first end portion (51) configured to engage with the support element (10) at the suction opening (20) and a second end portion (52) configured to engage fluid-tightly with the base wall (31).

2. The cooking hob (1) according to claim 1, wherein the filter (50) at the second end portion comprises a fluid-tight gasket (60) to place in fluid communication the suction opening (20) and the suction duct (30) between the first and second end portion (51, 52) of the filter (50).

3. The cooking hob (1) according to claim 1 or 2, wherein the filter (50) comprises one or more grease filters (53) and one or more odour filters (54).

4. The cooking hob (1) according to claim 3, wherein the filter (50) comprises a firstfilter holder frame (70) to support said one or more grease filters (53) and defining a first filtering channel (71) extended between the first and second end portion (51, 52) and having a first filtering opening (72) in fluid communication with the suction opening (20), a second opposite filtering opening (73) and a first filtering wall (74) having filtering openings (72, 73) and configured to place in fluid communication the suction opening (20) and the suction duct (30).

5. The cooking hob (1) according to claim 4, wherein the filter (50) comprises a second filter holder frame (80) said one or more odour filters (54) and defining a second filtering channel (81) extended between the first and second end portion (51, 52) and having a third filtering opening (82) in fluid communication with the suction opening (20), an opposite fourth filtering opening (83) plugged by the base wall (31) and a second filtering wall (84) defining the relative filtering openings (82, 83) and configured to place in fluid communication the first filtering channel (74) and the suction duct (30).

6. The cooking hob (1) according to claim 5, wherein the first filter holder frame (70) is configured to be arranged within the second filter holder frame (80).

7. The cooking hob (1) according to claim 6, wherein the first and second filtering channel (71. 81) are coaxial when the first filter holder frame (70) is inserted into the second filtering channel (81) of the second filter holder frame (80).

8. The cooking hob (1) according to any one of claims 5 to 7, wherein said first filter holder frame (70) and / or said second filter holder frame (80) comprise at their second end portion (52) a gasket element (60) surrounding the second filtering opening (73, 83) and configured to define the fluid-tight gasket (60) by conveying the suckedcooking fumes onto the first and second filtering wall (74, 84).

9. The cooking hob (1) according to any one of claims 5 to 8, wherein the filter (50) comprises:- first coupling members (90) configured to fix the removably between them first filter holder frame (70) and the second filter holder frame (80);- second coupling members (100) configured to removably fix the first filter holder frame (70) or the second filter holder (80) to the support element (10).

10. The cooking hob (1) according to any one of claims 5 to 9, wherein the first filter holder frame (70) comprises a collection vat (110) configured to collect liquids present in the sucked cooking fumes and retained to the first filter holder frame (70) at the second opening (73).

11. The cooking hob (1) according to claim 10, wherein the collection vat (110) comprises a collection tray (111) and a containment wall (112) extended from the collection tray (112) and spaced from the first filter holder frame (70) to define within the first and second filter channel (74, 84) a collection area (113) external to the collection vat (110), the containment wall (112) having a perforated connection edge (114) configured to removably connect the collection vat (110) to the first filter holder frame (70) and to drain the liquids from the collection vat (110) to the collection area (H3).

12. The cooking hob (1) according to any one of the preceding claims, wherein said filter (50) is axially-asymmetric, said axis of symmetry extending vertically between said first end portion (51) and said second end portion (52).

13. The cooking hob (1) according to claim 12, wherein said one or more grease filters (53) and said one or more odour filters (54) are cylindrical in shape without the base surfaces.

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