TECHNICAL FIELD

The invention relates to the oven with a drip collection channel in which condensation droplets are collected on the inner pane of the door.

STATE OF THE ART

A cavity is provided in the body domestic ovens, in which the consumables to be cooked are placed, and a hinged door to seal the cavity. The vapour formed during cooking in the cavity condenses by hitting the inner pane of the door. Drops form on the inner pane that doors the cavity are formed by condensation. At the bottom of the door, there is a reservoir where the drops are collected.

EP3440408, the cooking appliance comprises a door for the cooking chamber, a rear wall and a condensation collection device to collect the condensation that drains from the rear wall, condensate collection device comprises a collection and guide rail arranged on the door, which collection and guide rail catches condensate draining from the rear side and diverts said condensate in the direction of of a collection container of the condensate collection device arranged on the door.

BRIEF DESCRIPTION OF THE INVENTION

The object of the invention is to eliminate the need for additional collecting and guide rails adapted to the door pane in ovens.

In order to achieve the above objective, an oven comprising a cavity provided inside an casing and confining a cooking chamber, a front wall having a frame being formed from a one-piece metal sheet adapted to the casing and surrounding the outer periphery of the cavity, and a door that is hinged from an inner pane to the casing sealing the outer periphery in the closed position, and in such a way that abuts against the frame. The oven further comprises a bottom profile with a drip collection channel bent to extend forward under the inner pane and formed in the depression structure on the upper part of the front wall facing the inner pane therein. Therefore, during the forming of the front wall in one piece, for example by deep drawing, the drip collection channel can also be cold formed from the metal sheet itself. The drip collection channel in the depression structure can be formed as monolithically or multipartite, or even in a plurality of adjacent cavities. A drip collection channel with high thermal resistance against high temperatures formed on the front wall of the oven during the baking operation is obtained thanks to its monolithic structure.

In a preferred embodiment of the invention, the drip collection channel has a V-like cross- sectional form. Thanks to its cross-sectional form, the drips reaching the bottom profile from the inner door pane are accelerated and directed to the bottom of the channel. In possible embodiments, alternative shape forms such as u, w may be preferred.

In a preferred embodiment of the invention, the bottom profile includes a bottom bending extension that is bent backwards towards the cavity at a distance from the drip collection channel and on which an air duct is provided. In this way, with a single piece of metal sheet, both the drip collection channel and the air passage, through which the cooling air passes, can be obtained in one operation.

In a preferred embodiment of the invention, the air duct is in the staggered hole form extending along the width of the bottom profile. The staggered hole structure reduces the turbulence effect during the entry of ambient air from the lower part of the cavity. In a possible embodiment, the staggered hole structure consists of a plurality of elongated and adjacent holes.

In a preferred embodiment of the invention, the bottom bending extension is arranged inclined to direct the air duct towards the cavity. In this way, the negative pressure value required for the outer periphery of cooling air from the outside environment is reduced. In alternative embodiments, the bottom bending extension may also be configured in an upright position.

In a preferred embodiment of the invention, the door comprises an intermediate pane parallel and spaced to the inner pane, and a lower holding element that is aligned to the drip collection channel from the inner corner by holding the inner pane together from the bottom. The lower holding element receives the condensation drops accumulated on the inner pane from the lower corner of the inner pane and directs them to the drip collection channel. In addition, it keeps the inner pane and intermediate pane(s) together at a distance from each other on doors consisting of more than one pane. The lower holding element is preferably made of metal or a high temperature (eg 200C) resistant plastic.

In a preferred embodiment of the invention, the front wall is made of cold-formed, monolithic metal sheet deep-drawn so as to provide a bottom profile that is fixed from one end to the outer periphery of the cavity from an inner edge and from one end to the casing from one lower edge. In this way, when the front wall obtained by the deep drawing operation is placed aligned to form a flange on the cavity outer periphery, the bottom profile can be fixed from its inner edge to the lower edge of the cavity outer periphery and from its lower edge to the casing. Thus, the bottom profile forms a compact structure with a drip collection channel mounted on the cavity and the casing.

In a preferred embodiment of the invention, the oven comprises a vertically extending threshold between the inner edge of the front wall and the drip collection channel. The vertical threshold ensures that the drip collection channel formed by bending is detracted from the temperature of the cavity and reduces the thermal stresses on it.

A preferred embodiment of the invention comprises a first upper bend line extending transversely between the threshold and the drip collection channel, forming an angled transition wall. The upper bend line and the transition wall under the threshold ensure that in case of any splash from the door pane or condensation in the cavity or the front wall frame, the dripping or splashing drops from the threshold to the drip collection channel are accelerated and collected here.

In a preferred embodiment of the invention, the bending angle of the first upper bending line is adjusted perpendicular to the lower corner of the inner pane. In this way, the largest possible transition wall surface area is provided to catch the drippings from lower corner of the inner pane.

In a preferred embodiment of the invention, the outer pane is extended from its lower part in such a way that it at least partially closes the front wall inside the casing. Thus, any condensation drops splashing out of the oven is prevented and the bottom profile is visually closed.

In a preferred embodiment of the invention, the drip collection channel is arranged to extend through the outer periphery width in the bottom profile. In this way, droplet entry into the cavity through the outer periphery is prevented. In alternative embodiments, the drip collection channel may be set narrower or wider than the outer periphery width.

A preferred embodiment of the invention comprises a side slot provided by cold forming at the opposite ends of the bottom profile, where a hinge adapted to the door is partially inserted. The side slot facilitates the adaptation of the bottom profile to the hinged door and a more compact structure is obtained thereof.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a perspective illustration of a representative embodiment of a household oven in the partially open position.

Figure 2 is a perspective illustration of a front frame abutting the oven door from an inner pane.

Figure 3 is an upper profile illustration of the lower wall of the frame shown in Figure 2.

Figure 4 is a bottom sectional illustration of the lower wall of the frame shown in Figure 2 .

Figure 5 is a side sectional illustration of a representative embodiment of a household oven.

Figure 6 is a cross-sectional illustration of the bottom wall of the oven shown in Figure 5, comprising the collection chamber.

DETAILED DESCRIPTION OF THE INVENTION

In this detailed explanation, the development according to the invention is explained only for a better understanding of the subject without any limiting effect.

Figure 1 perspectively shows a household built-in oven. A prismatic casing (10) surrounds a cavity (30) with planar side walls (14) in the pane structure. The cavity (30) delimits a cooking chamber (1 ). A flange-forming front wall (40) is fixed to the cavity (30) made of flat metal sheet at the boundary of a rectangular outer periphery (34) of the cavity (30). A door (20) adapted to the casing (10) from its lower corner with the help of a hinge (50) is fixed to the front wall (40) over a frame (41), dooring the outer periphery (34) in the closed position. An upper pane (12) is provided in the casing (10) at the upper portion of the door (20). The upper pane (12) extends transversely in the form of a strip and comprises control elements on which the operating parameters of the furnace are adjusted. In the closed position of the door (20), two opposing columns (16) arranged to extend from the top pane (12) from both sides of the door (20) and an outer pane (24) of the door (20) are aligned in the same plane. Meanwhile, an inner pane (22) parallel and spaced to the outer pane (24) doors the opening (34) and an inner frame (21) delimiting the opposite side edges of the inner pane (22) fits within the frame (41 ) of the front wall (40). An upper edge (23) connecting the upper part of the inner and outer panes (22, 24) of the door (20) is in the form of a strip and is equipped with holes that allow air passage.

Figure 2 perspectively demonstrates the solid sheet metal front wall (40) separately. The frame (41 ), which has inwardly extended edges on the upper portion and sides, is in the form of a solid hollow rectangle. The lower edge of the frame (41) is in the form of a bottom profile

(42) extended forward by deep drawing. A drip collection channel (43) on the upper edge of the bottom profile (42) is self-formed in a depression structure. The drip collection channel

(43) extends parallel to the inner edge (45) of the frame (41 ) from below. The inner edge (45) forms a threshold (44) outwardly. A side slot (46) is formed on opposite sides of the bottom profile (42). The side slot (46) forms a recess suitable for the corresponding hinge (25) extensions.

Figure 3 perspectively demonstrates a bottom profile (42) at the lower end of the front wall (40) from the front portion. The bottom profile (42) is in the structure of a gradually elongated metal profile. The frame (41 ) has a U-like cross-section form at the side and upper portion. Bottom profile (42) comprises an outwardly stepped curved structure. The bottom profile (42) is mounted in the cavity (30) with a straight inner edge (45) at the outer periphery (34) of the cavity (30). The inner edge (45) extends downwards in L shape and forms a threshold (44). The threshold (44) is in the form of a straight strip. A flat platform extending outward is provided by bending over a first upper bending line (421 ) extending along the lower edge of the threshold (44). The platform also comprises a drip collection channel (43) in the form of depression structure extending along the outer periphery (34). The platform is extended downwards by bending along a second upper twist line (422) from its lower end to its entire length. The side slots (46) of the bottom profile (46) are in the form of a prismatic cavity.

Figure 4 perspectively demonstrates the bottom profile (42) from the inside. The platform of the bottom profile (42) is bent inward at an angle to form a first lower bending line (423) from its lower edge. A bottom bending extension (48) obtained by bending extends in a planar strip structure. The bottom bending extension (48) comprises air ducts (47), which are formed thoroughly, and are arranged in the same extension axis adjacent to each other. The end of the bottom bending extension (48) is bent along a second lower bending line (424) and brought to a position parallel to the inner edge (45).

Figure 5 shows the side sectional illustration of the furnace. The cavity (30) is fixed in the housing (10) at a distance from the outer edges in a prismatic structure. A retaining portion

(33) is formed on a planar side wall (32) of the cavity (30), protruding outwardly and forming parallel channels between them thereof. The inner pane (22) rests on the frame (41 ) in the closed position of the door (20). The door (20) is mounted to the casing (10) in a way that it can be opened from its lower part with a hinge (50) mounted from its lower edge.

Figure 6 demonstrates the enlarged view of the lower part of the furnace. The door (20) comprises intermediate panes (28) between the inner pane (22) and the outer pane (24), which are spaced and parallel to the inner and outer pane (22, 24). A connecting piece (26) extending thoroughly grips the inner pane (22) and the intermediate panes (28) from their lower ends and abuts the outer pane (24) from the inside. A screw extends downwards from the lower part of the connector (26), forming a guide end (25) thereof. The front wall (40) that is mounted in the cavity (30) with the help of a flange bent down around the outer periphery

(34) is mounted on the flange (45) from its inner edge. The threshold (44), formed by bending the inner edge (45) downwards vertically, is aligned to the lower end of the inner pane (22) from the corresponding flat edge of the lower holding element (26). The lower end of the threshold (44) reaches the transition wall (425) with the first upper bending line (421 ) at a wide angle. The first upper bend line (421 ) is aligned to the inner corner of the lower holding member (26). Lower end of the transition wall (425) comprises a drip collection channel (43) in the depression structure. The drip collection channel (43) is in the form of a v-section. The opposite edge of the drip collection channel 43 extends upward towards the inner corner of the guiding end (25). The second upper bend line (422) makes a curvilinear downward U- shaped turn. In this way, the downwardly extending bottom profile (42) passes into the bottom bending extension (48) by forming a first lower bending line (423) with a large inward angle. The bottom bending extension (48) is in the form of a flat strip, having an air duct (47) thoroughly. The angle of the bottom bending extension (48) directs the air duct (47) towards the cavity (30). The second lower bending line (424) forms an inward obtuse angle and forms the lower edge (49) extending parallel to the inner edge (45). The lower edge (49) attaches the front wall (40) to the casing (10) from below with a screw-like fastener (60) from its end. The air duct (47) is aligned coaxially with the drip collection channel (43) on the vertical axis. The transition wall (425) and the bottom bending extension (48) are arranged symmetrically on the horizontal axis.

In the closed form of the oven door (20), the lower holding element (26) is aligned with its inner corner and the guiding end (25) facing into the drip collection channel (43). Thus, The condensate formed by the condensation of the steam formed during cooking in the cavity (30) on the inner pane (22), is filtered from the inner pane (22), and drops are formed over the lower holding element (26) and over the guiding end (25), allowing them to descend into the drip collection channel (43). In addition, the vacuum created by the venturi effect on the upper edge (23) is transferred to the lower part of the door (20) between the inner pane (22) and the outer pane (24). In this way, the ambient air coming from the air duct (47) is drawn from the upper edge (23) to cool the door (20) panes (22, 24, 28). The air duct (47) faces upwards at the bottom bending extension (48), therefore, it is possible to draw ambient air from the outside environment with less vacuum.

REFERENCE NUMBERS

1 Cooking chamber 40 Front wall

10 Casing 41 Frame

12 Front pane 42 Bottom profile

14 Sidewall 421 First upper bend line

16 Columns 422 Second upper bend line

20 Door 423 First lower bend line

21 Inner frame 424 Second lower bend line

22 Inner pane 425 Transition wall

23 Upper edge 43 Drip collection channel

24 Outer pane 44 Threshold

25 Guide end 45 Inner edge

26 Lower holding element 46 Side slot

28 Intermediate pane 47 Air duct

30 Cavity 48 Bottom bending extension

32 Sidewall 49 Lower edge

33 Retainer portion 50 Hinge

34 Outer periphery 60 Fastener