AU2016296049B2

AU2016296049B2 - Oven door for an oven cavity of a cooking oven

Info

Publication number: AU2016296049B2
Application number: AU2016296049A
Authority: AU
Inventors: Dietmar Hildner; Branko Ivanovic; Mirjam MEISSNER; Rudolf Schmidt
Original assignee: Electrolux Appliances AB
Current assignee: Electrolux Appliances AB
Priority date: 2015-07-17
Filing date: 2016-06-27
Publication date: 2021-07-22
Anticipated expiration: 2036-06-27
Also published as: EP3118525B1; WO2017012830A1; EP3118525A1; AU2016296049A1; US20180187900A1

Abstract

The present invention relates to an oven door (10) for an oven cavity (40) of a cooking oven (36). The oven door (10) comprises a first unit (12, 28) including a front panel (12) and at least two door columns (28) permanently attached at an inner side of said front panel (12) and a second unit including an inner glass panel (14) and a door frame (20) permanently attached at said inner glass panel (14). The door frame (20) includes an upper frame part (24) and two lateral frame parts (26), wherein the lateral frame parts (26) are permanently attached at an outer side of the inner glass panel (14) and the upper frame part (24) is permanently attached at upper ends of the lateral frame parts (26). The lateral frame parts (26) are connected or connectable to the door columns (28) in each case, so that the first unit (12, 28) and the second unit (14, 20) are detachably or permanently connected or connectable. A ventilation opening (30) is formed between the inner glass panel (14) and the upper frame part (24). The ventilation opening (30) is formed by a cut-out in the inner glass panel (14), so that a lower side and lateral sides of said ventilation opening (30) are bordered by the inner glass panel (14) and an upper side of said ventilation opening (30) is bordered by the upper frame part (24). An inner side of the upper frame part (24) is in the same plane as the inner side of the inner glass panel (14) or protrudes inwardly.

Description

Oven door for an oven cavity of a cooking oven

Field of the invention The present invention relates to an oven door for an oven cavity

of a cooking oven. Further, the present invention relates to a

cooking oven. In particular, the present invention relates to an

oven door and a cooking oven, respectively, for a domestic ap

pliance.

Background For cooking ovens, several types of oven doors for closing the

oven cavity are known in the prior art. An important aspect of

the oven door is that the outer surface of said oven door is not

heated-up too much during the cooking process. This improves the

comfort of the cooking oven and decreases the risk of being

burned. Another aspect of the oven door is that all components

of the oven door have to withstand high temperatures. In partic

ular, if a pyrolytic cleaning mode is activated, then tempera

tures up to 5000C occur in the oven cavity. For this purposes,

o an inner glass panel made of borosilicate glass is used as a

first temperature protection shield. Further intermediate glass

panels may be arranged inside the oven door. The glass panels

are usually fixed at the oven door by a structure made of metal

and/or plastics. Since standard plastic materials cannot with

stand a very high temperature, the oven door has to be ventilat

ed in order to cool down and to avoid the melting of plastic

components.

EP 2 090 831 Al discloses an oven door with a door frame made of

steel. Said door frame surrounds at least partially the interior

of the oven door. An inner plate is attached at an inner side of

the door frame. An opening for ventilation is arranged between

the inner glass panel and an upper frame part of the door frame.

In a closed state of the oven door, the opening for ventilation

is connected to a suction area of an air channel of the oven.

The reference in this specification to any prior publication (or

information derived from it), or to any matter which is known,

is not, and should not be taken as, an acknowledgement or admis

sion or any form of suggestion that that prior publication (or

information derived from it) or known matter forms part of the

common general knowledge in the field of endeavour to which this

specification relates.

Summary

The present invention seeks to provide an oven door with an im

proved heat resistance.

According to one aspect of the present invention, there is pro

vided an oven door for an oven cavity of a cooking oven. The ov

en door comprises a first unit and a second unit. The first unit

includes a front panel and at least two door columns permanently

attached at an inner side of said front panel. The second unit

includes an inner glass panel and a door frame permanently at

o tached at said inner glass panel. The door frame includes an up

per frame part and two lateral frame parts. The lateral frame

parts are permanently attached at an outer side of the inner

glass panel. The upper frame part is permanently attached at up

per ends of the lateral frame parts. The lateral frame parts are

connected or connectable to the door columns in each case, so

that the first unit and the second unit are detachably or perma

nently connected or connectable. A ventilation opening is formed

between the inner glass panel and the upper frame part. The ven

tilation opening is formed by a cut-out in the inner glass pan

el, so that a lower side and lateral sides of said ventilation

opening are bordered by the inner glass panel and an upper side

of said ventilation opening is bordered by the upper frame part,

wherein an inner side of the upper frame part is in the same

plane as the inner side of the inner glass panel or the upper

frame part protrudes inwardly.

The main idea of the present invention is the structure of the

ventilation opening. Three sides of the ventilation opening are

enclosed by one component, i.e. the inner glass panel, while the

remaining side is bordered by the upper frame part. The inner

side of the upper frame part is at least in the same plane as

the inner side of the inner glass panel. Alternatively, the in

ner side of the upper frame part protrudes inwardly, i.e. into

the direction of the air channel.

Preferably, the inner glass panel is made of borosilicate glass.

The borosilicate glass has a heat resistance sufficient for py

rolytic cleaning.

In particular, the lateral frame parts are made of metal, pref

erably of stainless steel. Metal and glass have substantially

the same thermal expansion coefficient.

According to one embodiment, the upper frame part is made of

metal, preferably of stainless steel.

According to another embodiment, the upper frame part is made of

borosilicate glass. In this case, the ventilation opening is

completely bordered by glass.

Further, the lateral frame parts may be glued at an outer side

of the inner glass panel.

Moreover, the upper frame part may be glued on upper ends of the

lateral frame parts.

In a similar way, the door columns are glued at the inner side

of the front panel.

Additionally, at least one intermediate glass panel may be ar

ranged or arrangeable between the inner glass panel and the

front panel. Said intermediate glass panel may be arranged or

arrangeable between the lateral frame parts and/or between the

door columns.

Preferably, the first unit and the second unit are detachably

connected or connectable to each other and form the oven door.

This allows an easy cleaning of the oven door by the user.

Furthermore, the lateral frame part is connected or connectable

to the corresponding door column by at least one snap-in mecha

nism, wherein preferably the lateral frame part includes at

least one notch and the corresponding door column includes at

least one snapping hook.

The oven door may comprise a door handle attached detachably or

permanently at an outer side of the front panel.

Further, the present invention relates to a cooking oven com

prising an oven cavity, an oven door for closing a front opening

of said oven cavity and an air channel arranged above the oven

cavity, wherein a suction hole of the air channel is arranged

above the oven cavity, and wherein the an oven door includes a

ventilation opening connected or connectable to the suction

hole, wherein the cooking oven comprises an oven door mentioned

above.

In particular, the inner glass panel covers completely the front

opening of the oven cavity, when the oven door is in a closed

state.

Further, the cooking oven may include an exhaust opening of the

air channel, wherein said exhaust opening is arranged above the

suction hole of the air channel.

Preferably, the appendix of the upper frame part is arranged be

tween the suction hole and the exhaust opening of the air chan

nel, when the oven door is in the closed state. This allows an

improved separation between the suction hole and the exhaust

opening of the air channel.

According to another aspect of the invention, there is provided

an oven door for an oven cavity of a cooking oven. The oven door

o comprises a first unit and a second unit. The first unit in

cludes a front panel and at least two door columns permanently

attached at an inner side of said front panel relating to a

mounted state and closed position of the oven door, and the sec

ond unit includes an inner glass panel and a door frame perma

nently attached at said inner glass panel. The door frame in

cludes an upper frame part and two lateral frame parts relating

to the mounted state and closed position of the oven door. The

lateral frame parts are permanently attached at an outer side of

the inner glass panel relating to the mounted state and closed

position of the oven door. The upper frame part is permanently

attached at upper ends of the lateral frame parts relating to

the mounted state and closed position of the oven door. The lat

eral frame parts are connected or connectable to the door col

umns in each case, so that the first unit and the second unit

are detachably or permanently connected or connectable. A venti

lation opening is formed between the inner glass panel and the

upper frame part. The ventilation opening is formed by a cut-out

in the inner glass panel, so that a lower side and lateral sides

of said ventilation opening are bordered by the inner glass pan

el and an upper side of said ventilation opening is bordered by

the upper frame part, wherein either an inner side of the upper

frame part is in the same plane as the inner side of the inner

glass panel or the upper frame part protrudes inwardly.

Brief description of the drawings

The present invention will be described in further detail with

reference to the drawings, in which:

FIG 1 illustrates a schematic perspective view of an oven door

according to a first embodiment of the present invention,

FIG 2 illustrates a schematic exploded perspective view of the

oven door according to the first embodiment of the pre

sent invention,

FIG 3 illustrates a schematic perspective view of the oven door

according to a second embodiment of the present inven

tion,

FIG 4 illustrates a schematic perspective view of an inner

glass panel and a door frame for the oven door according

to the second embodiment of the present invention,

FIG 5 illustrates a schematic exploded perspective view of the

!o inner glass panel and the door frame for the oven door

according to the second embodiment of the present inven

tion,

FIG 6 illustrates a schematic sectional side view of an upper

portion of the oven door according to the first embodi

ment of the present invention, and

FIG 7 illustrates a schematic sectional side view of the upper

portion of the oven door according to a third embodiment

of the present invention arranged at a cooking oven.

Detailed description FIG 1 illustrates a schematic perspective view of an oven door

10 according to a first embodiment of the present invention. In

particular, said oven door 10 is provided for closing and open ing an oven cavity of a cooking oven. In this example, the oven door 10 is pivoting around a horizontal axis, wherein said hori zontal axis is arranged below or in a lower portion of an open ing of the oven cavity.

The oven door 10 comprises a front panel 12, an inner glass pan

el 14 and a door frame 20. The door frame 20 is substantially

arranged between the inner glass panel 14 and the front panel

12. The door frame 20 includes an upper frame part 24 and two

o lateral frame parts 26. The height and width of the front panel

12 are bigger than the height and width of the inner glass panel

14. Further, the oven door 10 comprises a door handle 22 at

tached at an outer side of the front panel 12.

A ventilation opening 30 is formed as a cut-out in the upper

portion of the inner glass panel 14. The ventilation opening 30

is formed as longitudinal cut-out extending along a horizontal

direction. The ventilation opening 30 is formed as a gap between

the inner glass panel 14 and the upper frame part 24 of the door

o frame 20.

The terms "outer", "inner", "upper", "horizontal" and they like

relate to the mounted state and closed position of the oven door

10.

In the first embodiment, the upper frame part 24 and the two

lateral frame parts 26 are made of metal. Preferably, the upper

frame part 24 and the two lateral frame parts 26 are made of

stainless steel. In this example, the inner glass panel 14 is

made of borosilicate glass.

FIG 2 illustrates a schematic exploded perspective view of the

oven door 10 according to the first embodiment of the present

invention. The oven door 10 comprises the front panel 12, the

inner glass panel 14 and the door frame 20. The door frame 20 includes the upper frame part 24 and the both lateral frame parts 26.

Two door columns 28 are attached at the inner side of the front

panel 12. The door columns 28 extend vertically in the mounted

and closed state of the oven door. Preferably, the door columns

28 are permanently attached at the front panel 12. The door

frame 20 and the inner glass panel 14 form a first unit, which

is attachable at the door columns 28. The front panel 12 and the

o door columns 28 form a second unit.

Each lateral frame part 26 includes at least one notch 32, while

each door column 28 includes at least one corresponding snapping

hook 34. In this example, each lateral frame part 26 includes

one notch 32, and each door column 28 includes one snapping hook

34. The notch 32 of the lateral frame part 26 and the corre

sponding snapping hook 34 of the door column 28 form a snap-in

mechanism. The first unit and the second unit are connectable by

the snap-in mechanism.

!0

Further, an outer intermediate glass panel 16 and an inner in

termediate glass panel 18 are arranged between the inner glass

panel 14 and the front panel 12. The outer intermediate glass

panel 16 and the inner intermediate glass panel 18 are arranged

between the door columns 28. Thus, the width of the inner glass

panel 14 is bigger than the widths of the outer intermediate

glass panel 16 and inner intermediate glass panel 18. In this

example, the oven door comprises two intermediate glass panels

16 and 18. In general, the oven door may comprise one or more

intermediate glass panels.

FIG 3 illustrates a schematic perspective view of the oven door

10 according to a second embodiment of the present invention.

The oven door 10 according to the second embodiment is similar

as the oven door 10 of the first embodiment.

The oven door 10 comprises the front panel 12, the inner glass

panel 14 and the door frame 20. The door frame 20 is substan

tially arranged between the inner glass panel 14 and the front

panel 12. The door frame 20 includes the upper frame part 24 and

two lateral frame parts 26. The height and width of the front

panel 12 are bigger than the height and width of the inner glass

panel 14. Further, the oven door 10 comprises the door handle 22

attached at an outer side of the front panel 12.

The ventilation opening 30 is formed as the cut-out in the upper

portion of the inner glass panel 14, wherein said ventilation

opening 30 is formed as longitudinal cut-out extending along a

horizontal direction. The ventilation opening 30 is formed as

the gap between the inner glass panel 14 and the upper frame

part 24 of the door frame 20.

In the second embodiment the upper frame part 24 of the glass

frame 20 is made of glass, while the two lateral frame parts 26

are made of metal. In particular, the inner glass panel 14 and

the upper frame part 24 are made of borosilicate glass. Prefera

bly, the lateral frame parts 26 are made of stainless steel.

FIG 4 illustrates a schematic perspective view of the inner

glass panel 14 and the door frame 20 for the oven door 10 ac

cording to the second embodiment of the present invention. The

inner glass panel 14 and the door frame 20 form the first unit.

Preferably, the door frame 20 is permanently attached at the in

ner glass panel 14. The lateral frame parts 26 are attached at

the outer side of the inner glass panel 14. The upper frame part

24 is attached at the upper ends of said lateral frame parts 26.

The ventilation opening 30 is formed as the cut-out in the upper

portion of the inner glass panel 14. The ventilation opening 30 extends over the central upper portion of the inner glass panel

14. The width of the ventilation opening 30 is marginally small

er than the width of the inner glass panel 14. Thus, the lateral

portions of the inner glass panel 14 have the full height of

said inner glass panel 14. In contrast, the central portion of

the inner glass panel 14 has a reduced height of said inner

glass panel 14.

FIG 5 illustrates a schematic exploded perspective view of the

o inner glass panel 14 and the door frame 20 for the oven door 10

according to the second embodiment of the present invention.

The lateral frame parts 26 are attached at the outer side of the

inner glass panel 14. Preferably, the lateral frame parts 26 are

glued on the outer side of the inner glass panel 14. The upper

frame part 24 is attached at the upper ends of said lateral

frame parts 26. For example, the upper frame part 24 is glued on

the upper ends of the lateral frame parts 26. The longitudinal

ventilation opening 30 extend horizontally between the inner

o glass panel 14 and the upper frame part 24. The ventilation

opening 30 extends over the central upper portion of the first

unit. The width of the ventilation opening 30 is marginally

smaller than the widths of the inner glass panel 14 and the up

per frame part 26. The lateral portions of the inner glass panel

14 have the full height of said inner glass panel 14, while the

central portion of the inner glass panel 14 has a reduced height

of said inner glass panel 14.

FIG 6 illustrates a schematic sectional side view of an upper

portion of the oven door 10 according to the first embodiment of

the present invention.

The door handle 22 is attached at the outer side of the front

panel 12. The door columns 28 are attached at the inner side of

the front panel 12. The front panel 12 and the door columns 28 form the first unit. The lateral frame parts 26 are attached at the outer side of the inner glass panel 14. In turn, the upper frame part 24 is attached at the upper ends of said lateral frame parts 26. The inner glass panel 14 and the door frame 20 including the upper frame part 24 and the lateral frame parts 26 form the second unit. The first unit and second unit are con nected by the snap-in mechanism between the lateral frame part

26 and door columns 28.

FIG 6 clarifies that the inner side of the upper frame part 24

is in the same plane as the inner side of the inner glass panel

14.

FIG 7 illustrates a schematic sectional side view of the upper

portion of the oven door 10 according to a third embodiment of

the present invention arranged at the cooking oven 36. The oven

door 10 is in the closed state.

The oven door 10 comprises the front panel 12, the inner glass

o panel 14 and the door frame 20. The door frame 20 includes the

upper frame part 24 and the two lateral frame parts 26. The

height and width of the front panel 12 are bigger than the

height and width of the inner glass panel 14. The oven door 10

comprises the door handle 22 attached at the outer side of the

front panel 12. The outer intermediate glass panel 16 and the

inner intermediate glass panel 18 are arranged between the inner

glass panel 14 and the front panel 12. The ventilation opening

30 is arranged between the inner glass panel 14 and the upper

frame part 24.

The oven door 10 is attached at the cooking oven 36. The oven

door 10 is in the closed state. The cooking oven 36 comprises

the oven cavity 40, a front frame 38 and an air channel 42. The

front frame 38 encloses the front opening of the oven cavity 40.

The air channel 42 is arranged above the oven cavity 40. The air

channel 42 includes a suction hole 44 and an exhaust opening 46.

The ventilation opening 30 of the oven door 10 is arranged in

front of the suction hole 44 of the air channel 42. Thus, the

inner space of the oven door is connected to the air channel 42.

The air channel 42 effects an air stream inside the oven door

10. In particular, the front panel 12 is cooled-down by said air

stream. In the closed state of the oven door 10, the oven cavity

40 on the one hand and the air channel 42, the suction hole 44,

the exhaust opening 48 and the ventilation opening 30 on the

other hand are separated by a gasket 48.

The oven door 10 according to the third embodiment is similar as

the oven door 10 of the first embodiment. The oven door 10 of

the third embodiment differs from that of the first embodiment

in that the upper frame part 24 protrudes at the inner side of

the oven door 10. Thus, the inner side of the upper frame part

24 is closer to the front frame 38 of the cooking oven 36 as the

inner glass panel 14. The upper frame part 24 includes an appen

dix 50. Said appendix 50 forms the innermost part of the upper

portion of the oven door 10. The appendix 50 improves the spa

tial separation between the suction hole 44 and the exhaust

opening 46. This avoids a bypass between the suction hole 44 and

the exhaust opening 46.

The oven door 10 according to the present invention is suitable

for pyrolytic cleanings. The inner glass panel 14 is made of a

sufficiently heat resistant material, in particular borosilicate

glass. The lower side and the lateral sides of the ventilation

opening 30 are bordered by the inner glass panel 14 made of heat

resistant material. The upper side of the ventilation opening 30

is bordered by the upper frame part 24 of the door frame 20. The

upper frame part 24 is made of steel or glass, preferably stain

less steel or borosilicate glass, respectively. According to the first and second embodiments, the inner side of the upper frame part 24 is in the same plane as the inner side of the inner glass panel 14. According to the third embodiment, the inner side of the upper frame part 24 protrudes and includes the ap pendix 50.

Metal and glass, in particular stainless steel and borosilicate

glass have similar thermal expansion coefficients. The contact

between the inner glass panel 14 and the metallic parts of the

o door frame 20 allows a substantially uniform heat distribution

at the inner glass panel 14, so that a bending of the inner

glass panel 14 is avoided.

Although illustrative embodiments of the present invention have

been described herein with reference to the accompanying draw

ing, it is to be understood that the present invention is not

limited to those precise embodiments, and that various other

changes and modifications may be affected therein by one skilled

in the art without departing from the scope or spirit of the in

vention. All such changes and modifications are intended to be

included within the scope of the invention as defined by the ap

pended claims.

Throughout this specification and the claims which follow, un

less the context requires otherwise, the word "comprise", and

variations such as "comprises" or "comprising", will be under

stood to imply the inclusion of a stated integer or step or

group of integers or steps but not the exclusion of any other

integer or step or group of integers or steps.

List of reference numerals

oven door 12 front panel 14 inner glass panel 16 outer intermediate glass panel 18 inner intermediate glass panel door frame 22 door handle 24 upper frame part 26 lateral frame part 28 door column ventilation opening 32 notch 34 snapping hook 36 cooking oven 38 front frame oven cavity 42 air channel 44 suction hole 46 exhaust opening 48 gasket appendix

Claims

The claims defining the invention are as follows:

1. An oven door for an oven cavity of a cooking oven, wherein:

the oven door comprises a first unit and a second unit;

the first unit includes a front panel and at least two

door columns permanently attached at an inner side of said

front panel relating to a mounted state and closed position

of the oven door;

the second unit includes an inner glass panel and a

door frame permanently attached at said inner glass panel;

the door frame includes an upper frame part and two

lateral frame parts relating to the mounted state and closed

position of the oven door;

the lateral frame parts are permanently attached at an

outer side of the inner glass panel relating to the mounted

state and closed position of the oven door;

the upper frame part is permanently attached at upper

ends of the lateral frame parts relating to the mounted

state and closed position of the oven door;

!0 the lateral frame parts are connected or connectable to

the door columns in each case, so that the first unit and

the second unit are detachably or permanently connected or

connectable;

a ventilation opening is formed between the inner glass

panel and the upper frame part; and

the ventilation opening is formed by a cut-out in the

inner glass panel, so that a lower side and lateral sides of

said ventilation opening are bordered by the inner glass

panel and an upper side of said ventilation opening is bor

dered by the upper frame part, wherein either an inner side

of the upper frame part is in the same plane as the inner

side of the inner glass panel or the upper frame part pro

trudes inwardly.

2. The oven door as claimed in claim 1, wherein the inner glass

panel is made of borosilicate glass.

3. The oven door as claimed in claim 1 or 2, wherein the lat

eral frame parts are made of metal.

4. The oven door as claimed in any one of claims 1 to 3, where

in the upper frame part is made of metal.

5. The oven door as claimed in claim 3 or 4, wherein the metal

is stainless steel.

6. The oven door as claimed in any one of claims 1 to 3, where

in the upper frame part is made of borosilicate glass.

7. The oven door as claimed in any one of claims 1 to 6, where

in the lateral frame parts are glued at an outer side of the

inner glass panel.

8. The oven door as claimed in claim 7, wherein the upper frame

part is glued on upper ends of the lateral frame parts.

9. The oven door as claimed in any one of claims 1 to 8, where

in the door columns are glued at the inner side of the front

panel.

10. The oven door as claimed in any one of claims 1 to 9, where

in at least one intermediate glass panel is arranged or ar

rangeable between the inner glass panel and the front panel.

11. The oven door as claimed in claim 10, wherein the at least

one intermediate glass panel is arranged or arrangeable be

tween the lateral frame parts and/or between the door col

umns.

12. The oven door as claimed in any one of claims 1 to 11,

wherein the first unit and the second unit are detachably

connected or connectable to each other and form the oven

door.

13. The oven door as claimed in claim 12, wherein the lateral

frame part is connected or connectable to the corresponding

door column by at least one snap-in mechanism.

14. The oven door as claimed in claim 13, wherein the lateral

frame part includes at least one notch and the corresponding

door column includes at least one snapping hook.

15. The oven door as claimed in any one of claims 1 to 14,

wherein the oven door comprises a door handle attached de

tachably or permanently at an outer side of the front panel.

16. A cooking oven comprising an oven cavity, an oven door for

closing a front opening of said oven cavity and an air chan

!0 nel arranged above the oven cavity, wherein a suction hole

of the air channel is arranged above the oven cavity, where

in the oven door includes a ventilation opening connected or

connectable to the suction hole, wherein at least one gasket

is arranged between the oven cavity and the air channel, and

wherein the oven door is an oven door as claimed in any one

of claims 1 to 15.

17. The cooking oven as claimed in claim 16, wherein the inner

glass panel covers completely the front opening of the oven

cavity when the oven door is in a closed state.

18. The cooking oven as claimed in claim 16 or 17, wherein the

cooking oven includes an exhaust opening of the air channel,

wherein said exhaust opening is arranged above the suction

hole of the air channel.

19. The cooking oven as claimed in claim 18, wherein the appen

dix of the upper frame part is arranged between the suction

hole and the exhaust opening of the air channel when the ov

en door is in the closed state.