U.S. patent application number 15/740037 was filed with the patent office on 2018-07-05 for oven door for an oven cavity of a cooking oven.
The applicant listed for this patent is ELECTROLUX APPLIANCES AKTIEBOLAG. Invention is credited to Dietmar HILDNER, Branko IVANOVIC, Mirjam MEISSNER, Rudolf SCHMIDT.
Application Number | 20180187900 15/740037 |
Document ID | / |
Family ID | 53673810 |
Filed Date | 2018-07-05 |
United States Patent
Application |
20180187900 |
Kind Code |
A1 |
IVANOVIC; Branko ; et
al. |
July 5, 2018 |
OVEN DOOR FOR AN OVEN CAVITY OF A COOKING OVEN
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.
Inventors: |
IVANOVIC; Branko;
(Rothenburg ob der Tauber, DE) ; SCHMIDT; Rudolf;
(Rothenburg ob der Tauber, DE) ; MEISSNER; Mirjam;
(Rothenburg ob der Tauber, DE) ; HILDNER; Dietmar;
(Rothenburg ob der Tauber, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ELECTROLUX APPLIANCES AKTIEBOLAG |
Stockholm |
|
SE |
|
|
Family ID: |
53673810 |
Appl. No.: |
15/740037 |
Filed: |
June 27, 2016 |
PCT Filed: |
June 27, 2016 |
PCT NO: |
PCT/EP2016/064872 |
371 Date: |
December 27, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F24C 15/006 20130101;
F24C 15/04 20130101; F24C 15/028 20130101 |
International
Class: |
F24C 15/00 20060101
F24C015/00; F24C 15/04 20060101 F24C015/04 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 17, 2015 |
EP |
15177181.3 |
Claims
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, 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, the lateral frame parts are
permanently attached at an outer side of the inner glass panel, the
upper frame part is permanently attached at upper 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 permanently connected or
connectable, and a ventilation opening is formed between the inner
glass panel and the upper frame part, wherein 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 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.
2. The oven door according to claim 1, wherein the inner glass
panel in made of borosilicate glass.
3. The oven door according to claim 1, wherein the lateral frame
parts are made of metal.
4. The oven door according to claim 1, wherein the upper frame part
is made of metal.
5. The oven door according to claim 1, wherein the upper frame part
is made of borosilicate glass.
6. The oven door according to claim 1, wherein the lateral frame
parts are glued at an outer side of the inner glass panel.
7. The oven door according to claim 1, wherein the door columns are
glued at the inner side of the front panel.
8. The oven door according to claim 1, wherein at least one
intermediate glass panel is arranged or arrangeable between the
inner glass panel and the front panel and between at least one of
the lateral frame parts and the door columns.
9. The oven door according to claim 1, wherein the first unit and
the second unit are detachably connected or connectable to each
other and form the oven door.
10. The oven door according to claim 9, wherein the lateral frame
part is connected or connectable to the corresponding door column
by at least one snap-in mechanism.
11. The oven door according to claim 1, wherein the oven door
comprises a door handle attached detachably or permanently at an
outer side of the front panel.
12. A cooking oven comprising an oven cavity, the oven door
according to claim 1 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, said ventilation opening being connected or connectable to
the suction hole, and wherein at least one gasket is arranged
between the oven cavity and the air channel.
13. The cooking oven according to claim 12, wherein the inner glass
panel covers completely the front opening of the oven cavity when
the oven door is in a closed state.
14. The cooking oven according to claim 12, 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
15. The cooking oven according to claim 14, wherein an appendix of
the upper frame part is arranged between the suction hole and the
exhaust opening of the air channel when the oven door is in the
closed state.
16. The oven door according to claim 6, said upper frame part being
glued on upper ends of the lateral frame parts.
17. The oven door according to claim 10, wherein the lateral frame
part includes at least one notch and the corresponding door column
includes at least one snapping hook.
18. A cooking oven comprising an oven cavity and a front frame
enclosing an opening of the oven cavity; an air channel arranged
above said oven cavity and having suction hole for drawing air into
said channel and an exhaust opening for exhausting air from said
channel, both said suction hole and said exhaust opening being
arranged in said front frame; an oven door attached to the cooking
oven, said oven door comprising an inner glass panel that
completely covers said oven-cavity opening in a closed state of the
door; said oven door comprising a first unit and a second unit,
said first unit comprising a door frame permanently attached to
said inner glass panel, and said second unit comprising opposing
door columns permanently attached to a front panel, said first and
second units being reversibly attached via a snap-fit connection
between said door columns and said door frame such that said door
frame is disposed between said inner glass panel and said front
panel; a ventilation opening formed as a longitudinal cut-out in an
upper portion of said inner glass panel and extending along a
horizontal direction, said ventilation opening being defined as a
gap between said inner glass panel and an upper frame part of said
door frame; said ventilation opening being arranged in front of
said suction opening in said closed state thereby defining a path
of fluid communication between an interior of said door and said
air channel, said inner glass panel and portions of said door frame
contacting said inner glass panel all having substantially the same
thermal-expansion coefficient.
19. The cooking oven according to claim 18, said upper frame part
comprising an appendix that forms an innermost part of an upper
portion of said oven door, said appendix extending inward in said
closed state to thereby inhibit air mixing between said suction
hole and said exhaust opening.
20. The cooking oven according to claim 18, further comprising an
intermediate glass panel disposed within said door frame and
between said front panel and said inner glass panel, said inner
glass panel being borosilicate glass, said door frame being
stainless steel.
Description
[0001] The present invention relates to an oven door for an oven
cavity of a cooking oven according to the preamble of claim 1.
Further, the present invention relates to a cooking oven according
to the preamble of claim 12. In particular, the present invention
relates to an oven door and a cooking oven, respectively, for a
domestic appliance.
[0002] 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 particular, if a
pyrolytic cleaning mode is activated, then temperatures up to
500.degree. C. occur in the oven cavity. For this purposes, 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 withstand a very
high temperature, the oven door has to be ventilated in order to
cool down and to avoid the melting of plastic components.
[0003] EP 2 090 831 A1 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.
[0004] 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.
[0005] It is an object of the present invention to provide an oven
door with an improved heat resistance.
[0006] The object is achieved by the oven door according to claim
1.
[0007] According to the present invention 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 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.
[0008] 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 inner side of the
upper frame part protrudes inwardly, i.e. into the direction of the
air channel.
[0009] Preferably, the inner glass panel is made of borosilicate
glass. The borosilicate glass has a heat resistance sufficient for
pyrolytic cleaning.
[0010] In particular, the lateral frame parts are made of metal,
preferably of stainless steel. Metal and glass have substantially
the same thermal expansion coefficient.
[0011] According to one embodiment, the upper frame part is made of
metal, preferably of stainless steel.
[0012] According to another embodiment, the upper frame part is
made of borosilicate glass. In this case, the ventilation opening
is completely bordered by glass.
[0013] Further, the lateral frame parts may be glued at an outer
side of the inner glass panel.
[0014] Moreover, the upper frame part may be glued on upper ends of
the lateral frame parts.
[0015] In a similar way, the door columns are glued at the inner
side of the front panel.
[0016] Additionally, at least one intermediate glass panel may be
arranged 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.
[0017] 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.
[0018] Furthermore, the lateral frame part is connected or
connectable to the corresponding door column by at least one
snap-in mechanism, wherein preferably the lateral frame part
includes at least one notch and the corresponding door column
includes at least one snapping hook.
[0019] The oven door may comprise a door handle attached detachably
or permanently at an outer side of the front panel.
[0020] Further, the present invention relates to a cooking oven
comprising 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.
[0021] In particular, the inner glass panel covers completely the
front opening of the oven cavity, when the oven door is in a closed
state.
[0022] 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.
[0023] Preferably, the appendix of the upper frame part is arranged
between the suction hole and the exhaust opening of the air
channel, 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.
[0024] Novel and inventive features of the present invention are
set forth in the appended claims.
[0025] The present invention will be described in further detail
with reference to the drawing, in which
[0026] FIG. 1 illustrates a schematic perspective view of an oven
door according to a first embodiment of the present invention,
[0027] FIG. 2 illustrates a schematic exploded perspective view of
the oven door according to the first embodiment of the present
invention,
[0028] FIG. 3 illustrates a schematic perspective view of the oven
door according to a second embodiment of the present invention,
[0029] 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,
[0030] FIG. 5 illustrates a schematic exploded perspective view of
the inner glass panel and the door frame for the oven door
according to the second embodiment of the present invention,
[0031] FIG. 6 illustrates a schematic sectional side view of an
upper portion of the oven door according to the first embodiment of
the present invention, and
[0032] 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.
[0033] 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
opening an oven cavity of a cooking oven. In this example, the oven
door 10 is pivoting around a horizontal axis, wherein said
horizontal axis is arranged below or in a lower portion of an
opening of the oven cavity.
[0034] The oven door 10 comprises a front panel 12, an inner glass
panel 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 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 attached at an
outer side of the front panel 12.
[0035] 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
frame 20.
[0036] The terms "outer", "inner", "upper", "horizontal" and they
like relate to the mounted state and closed position of the oven
door 10.
[0037] 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.
[0038] 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.
[0039] 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 door
columns 28 form a second unit.
[0040] 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
corresponding 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.
[0041] Further, an outer intermediate glass panel 16 and an inner
intermediate 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.
[0042] 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.
[0043] The oven door 10 comprises the front panel 12, the inner
glass panel 14 and the 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 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.
[0044] 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.
[0045] 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. Preferably,
the lateral frame parts 26 are made of stainless steel.
[0046] FIG. 4 illustrates a schematic perspective view of the inner
glass panel 14 and the door frame 20 for the oven door 10 according
to the second embodiment of the present invention. The inner glass
panel 14 and the door frame 20 form the first unit.
[0047] Preferably, the door frame 20 is permanently attached at the
inner 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.
[0048] 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 smaller
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.
[0049] FIG. 5 illustrates a schematic exploded perspective view of
the inner glass panel 14 and the door frame 20 for the oven door 10
according to the second embodiment of the present invention.
[0050] 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 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 upper 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.
[0051] 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.
[0052] 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 connected by the snap-in
mechanism between the lateral frame part 26 and door columns
28.
[0053] 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.
[0054] 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.
[0055] 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 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.
[0056] 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.
[0057] 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.
[0058] 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
appendix 50. Said appendix 50 forms the innermost part of the upper
portion of the oven door 10. The appendix 50 improves the spatial
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.
[0059] 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
stainless 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 appendix 50.
[0060] 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 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.
[0061] Although illustrative embodiments of the present invention
have been described herein with reference to the accompanying
drawing, 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
invention. All such changes and modifications are intended to be
included within the scope of the invention as defined by the
appended claims.
LIST OF REFERENCE NUMERALS
[0062] 10 oven door [0063] 12 front panel [0064] 14 inner glass
panel [0065] 16 outer intermediate glass panel [0066] 18 inner
intermediate glass panel [0067] 20 door frame [0068] 22 door handle
[0069] 24 upper frame part [0070] 26 lateral frame part [0071] 28
door column [0072] 30 ventilation opening [0073] 32 notch [0074] 34
snapping hook [0075] 36 cooking oven [0076] 38 front frame [0077]
40 oven cavity [0078] 42 air channel [0079] 44 suction hole [0080]
46 exhaust opening [0081] 48 gasket [0082] 50 appendix
* * * * *