[0001] The present invention relates to a cooking oven, in particular for household use,
according to the preamble of claim 1.
[0002] Modern household cooking ovens are usually fitted with doors comprising two or three
parallel panes, in particular made of glass, to allow the user to monitor the cooking
of the foods placed therein.
[0003] It is understood that, in the present description, the term "glass pane" will be
used to indicate an element made of a substantially transparent material, regardless
of the actual material said element is made of.
[0004] The cooking ovens known in the art are affected by the problem that the outermost
pane may reach excessive temperatures, which might be dangerous in the event of accidental
contact therewith, especially when the oven is a pyrolytic one.
[0005] In an attempt to find a remedy for this problem, it is known in the art to provide
said door in a manner such that it comprises at least a first and a second panes adapted
to define an interspace, so as to reduce the transfer of heat from the oven to the
outermost pane. However, even with such an interspace, generally the temperature reached
by the outermost pane still reaches excessively high values.
[0006] Consequently, it is known in the art to blow air into said interspace, by either
natural or forced convection, in order to improve the cooling effect on the panes
of cooking ovens' doors, in particular on the outermost one farthest from an oven
muffle.
[0007] For example, one type of cooking oven, in particular for household use, is known
in the art which comprises:
- a muffle adapted to be closed by a door,
- at least a first and a second panes adapted to define an interspace in said door,
- a cooling system comprising a fan and a delivery duct adapted to blow air into said
interspace.
[0008] According to the above-described solution, said delivery duct is made of metallic
material, in particular sheet metal, and is welded to the remaining components of
the oven; usually the delivery duct is welded to a plate coupled to the bottom of
the delivery duct.
[0009] However, this solution has a few drawbacks, in that making a metallic delivery duct
is a costly process that requires it to be manually welded to the remaining components
of the oven, in particular to said plate coupled to the bottom of the delivery duct.
[0010] In addition, according to the above solution, at least some of the air blown by the
cooling system into said interspace is taken from an inner portion of the oven muffle.
[0011] This solution suffers from some drawbacks as well, in that the air taken from the
muffle is necessarily greasy and oily, and therefore it fouls the panes it comes in
contact with.
[0012] A further drawback of the above-described solution is that, since the panes are secured
to the door, it is particularly difficult to remove the dirt created by the air taken
from the oven muffle, which task requires complex operations for disassembling the
various components of the oven door. Moreover, the air taken from the muffle generally
has a rather high temperature and cannot cool the panes properly.
[0013] Document
DE102004008465A1 discloses a cooking oven comprising: a cabinet comprising a muffle adapted to be
closed by a door, a first and a second pane adapted to create a first interspace in
said door, a cooling system comprising a fan and a delivery duct adapted to blow air
into said first interspace, the delivery duct being mounted over the muffle. Document
DE4111245A1 discloses a connecting unit for connecting a first component to a second component,
having opposing pairs of elastically movable snap hooks connected together at their
feed by a foot plate. The connecting unit is connected to a base plate which is integrated
into the first component.
[0014] In this frame, it is the main object of the present invention to overcome the above-mentioned
drawbacks by providing a cooling system for a cooking oven, in particular for household
use, so designed as to be economical to produce and to not require any manual intervention
for welding the delivery duct to the remaining components of the oven.
[0015] It is another object of the present invention to provide a cooling system for a cooking
oven which is effective even though it is made up of low-cost parts, and which can
be easily assembled when manufacturing the cooking oven as well as easily disassembled
in order to, for example, gain access to internal components of said system during
repair, replacement or maintenance operations.
[0016] It is a further object of the present invention to provide a cooling system for a
cooking oven, in particular for household use, so designed as to allow the muffle
door to be highly efficient in terms of thermal insulation and cooling of its outer
surface.
[0017] It is another object of the present invention to provide a cooling system for a cooking
oven, in particular for household use, so designed that the door allows good visibility
of the oven muffle and of the foods contained therein.
[0018] It is yet another object of the present invention to provide a cooling system for
a cooking oven, in particular for household use, so designed that the cooling air
flow cannot foul the interspaces obtained between the panes, thus not requiring difficult
cleaning operations.
[0019] Said objects are achieved by the present invention through a cooling system for a
cooking oven, in particular for household use, incorporating the features set out
in the appended claims, which are intended as an integral part of the present description.
[0020] Further objects, features and advantages of the present invention will become apparent
from the following detailed description and from the annexed drawings, which are supplied
by way of non-limiting example, wherein:
- Fig. 1 is a side sectional view of a possible embodiment of a cooking oven, in particular
for household use, according to the present invention;
- Fig. 2a is a top view of a first component of the cooking oven, in particular for
household use, according to the present invention, and Fig. 2b shows a detail of a
section A-A of Fig. 2a;
- Fig. 3a is a top view of a second component of the cooking oven, in particular for
household use, according to the present invention, and Fig. 3b shows a detail of a
section C-C of Fig. 3a;
- Fig. 4a is a top view of the assembly consisting of the first component of Fig. 2a
and the second component of Fig. 3a, and Fig. 4b shows a detail of a section E-E of
Fig. 4a;
- Fig. 5 is an exploded perspective view of the assembly of Fig. 4a;
- Fig. 6 is a perspective view of the assembly of the cooking oven of Figs. 4a and 5.
Referring now to the annexed drawings, reference numeral 1 designates as a whole a
cooking oven, in particular for household use, of the type comprising:
- a cabinet 2 comprising a muffle 3 adapted to be closed by a door 4,
- a first 5A and a second 5B panes adapted to create at least a first interspace 6A
in said door 4,
- a cooling system, designated as a whole by reference numeral 10, comprising a fan
11 and a delivery duct 12 adapted to blow a forced air flow into said first interspace
6A.
[0021] In particular, said fan 11 is a tangential fan positioned within a housing 11A (visible
in particular in Figs. 2a, 4a and 5) of the delivery duct 12, and is driven by a motor
13, which is advantageously of the controllable variable-speed type. Alternatively,
said fan 11 may be a centrifugal or axial one.
[0022] Furthermore, the delivery duct 12 has such a shape as to ensure optimal air conveyance
into the first interspace 6A of the door 4; in particular, said delivery duct 12 is
substantially flat and has a flared shape, and comprises at least one slot 12A to
blow a forced air flow into said first interspace 6A; Figs. 5 and 6 show a plurality
of slots 12A. As can be seen in particular in Fig. 1, the door 4 of the cooking oven
1 may comprise a third pane 5C adapted to create a second interspace 6B with said
second pane 5B. Preferably, the third pane 5C is associated with the door 4 in a manner
such as to keep said second interspace 6B without forced ventilation; it is however
also possible to associate the third pane 5C with the door 4 in a manner such as to
allow the air coming from the cooling system 10 to flow into the second interspace
6B.
[0023] In a preferred embodiment, if the cooking oven 1 comprises a plurality of interspaces
6A, 6B, the first interspace 6A through which the forced air flow is blown is the
innermost one, i.e. the one closest to the muffle 3, so that the third pane 5C is
the outermost pane also having an aesthetical function.
[0024] The door 4 preferably comprises a maximum number of three panes 5A, 5B, 5C, in that
the cooling system 10 allows to obtain a good thermal insulation of the muffle 3 and
an adequate temperature of the outermost pane 5A, 5B, 5C, i.e. the one farthest from
the muffle 3; as a consequence, the cooling system 10 according to the present invention
allows the door 4 to be designed with a number of panes 5A, 5B, 5C no higher than
three. As known in the art, the walls of said muffle 3 are coated with a thermally
insulating material, and define internally a cooking compartment wherein heating means
are generally arranged (not shown in the drawings) which are adapted to raise the
temperature inside said muffle 3 up to a desired food cooking temperature.
[0025] In addition, between the cabinet 2 and the muffle 3 there is a space 7 that embraces
the walls of the muffle 3 so as to improve the thermal insulation between the inside
of the muffle 3 and the outer surface of the cabinet 2, said space 7 at least partly
containing an insulating material such as, for example, glass wool or cellular glass.
[0026] It must be noted that the air to be blown into said first interspace 6A may be drawn
by the cooling system 10 indifferently from the space 7 and/or from the environment
outside the cabinet 2, e.g. through a plurality of slots 2A provided in said cabinet
2.
[0027] The sealing between the door 4 and the muffle 3 is ensured by a gasket 8, generally
made of rubber or fibreglass, arranged either on the edge of the muffle 3 or on the
door 4; Fig. 1 only shows the upper and lower portions of the gasket 8.
[0028] In accordance with the present invention, the cooking oven 1 comprises fixing means
(designated as a whole by reference numeral 100 in Figs. 4a, 4b and 6) for snap-coupling
the delivery duct 12 to a plate 50, the latter being in particular adapted to be coupled
to the bottom of said delivery duct 12.
[0029] As can be seen in particular in Figs. 2a to 4b, said fixing means 100 comprise at
least one pair of elastic tabs 101 associated with said delivery duct 12 and at least
one through hole 52 obtained in said plate 50. Each elastic tab 101 has one tooth
102 which allows the delivery duct 12 to be snap-coupled once there is no longer any
interference between the tooth 102 and the through hole 52, in particular a wall 53
of the through hole 52.
[0030] In a preferred embodiment, the delivery duct 12 is made of plastic material, and
said elastic tabs 101 are obtained when moulding the delivery duct 12. The delivery
duct 12 may be made of a plastic material such as ABS or polyamide, in particular
polyamide reinforced with glass fibres, preferably in a percentage of approximately
35% (this latter material is commercially known as PA 66 35% G F). Advantageously,
the plastic material of the delivery duct 12 has adequate elastic properties and a
low fibreglass charge.
[0031] The particular design of the delivery duct 12 and of the fixing means 100 according
to the present invention allows to provide a cooling system for a cooking oven 1,
in particular for household use, which is economical to produce and which requires
no manual intervention for welding the delivery duct 12 to the remaining components
of the cooking oven 1.
[0032] Furthermore, the delivery duct 12 and the fixing means 100 designed in accordance
with the present invention ensure minimal plays between the delivery duct 12 and the
plate 50 in both the vertical and longitudinal directions; as a consequence, in addition
to making it easier to couple the delivery duct 12 to the plate 50, this design also
allows to compensate for any construction tolerances of said delivery duct 12 and
said plate 50.
[0033] In a preferred embodiment, said fixing means 100 are positioned at the sides of the
delivery duct 12, so as to ensure adequate sealing of the delivery duct 12 and to
prevent any significant leaks of cooling air, said fixing means 100 being preferably
arranged symmetrically with respect to a longitudinal axis A (shown by means of a
dashed-dotted line in Fig. 4a) of the cooking oven 1 and/or being in a number of at
least three per side, more advantageously five per side.
[0034] Preferably, said plate 50 is made of sheet metal and said at least one through hole
52 is obtained when pressing the plate 50.
[0035] In addition, said plate 50 is secured to the sides of the cooking oven 1, an insulating
material being interposed between said plate 50 and the muffle 3 to prevent the air
that must be blown into said first interspace 6A from getting heated too much by the
hot muffle 3.
[0036] According to a preferred embodiment, the region of the plate 50 where said at least
one through hole 52 is obtained comprises an emboss. This allows to reinforce the
plate 50, in particular made of sheet metal, in the region where it couples to the
delivery duct 12, as well as to design each elastic tab 101 in a manner such that
its length is sufficient to ensure adequate elasticity of said elastic tab 101. Said
emboss is then sheared in a manner such that support surfaces are generated for the
elastic tabs 101 and/or for the teeth 102. Also, Fig. 2b shows that the tooth 102
preferably comprises a striker surface 103 which is substantially parallel to the
plate 50 when the elastic tab 101 is inserted in the through hole 52; this ensures
adequate grip of the tooth 102 and provides an optimal coupling between the delivery
duct 12 and the plate 50.
[0037] Still in Fig. 2b, it can be seen that each elastic tab 101 is so designed as to form
an angle β with the delivery duct 12, said angle β being between 45° and 80°, preferably
between 72° and 77°, more preferably of approximately 76°; the particular size of
the angle β according to the present invention allows the elastic tab 101 both to
become elastically deformed in an optimal manner and to be easily inserted into the
through hole 52.
[0038] In Figs. 3a and 5 it is possible to see that the plate 50 comprises an opening 51
which is associated with a hole 14 in the delivery duct 12 to allow for the passage
of a tubular element 27 associated with an aperture 3A in the muffle 3.
[0039] Still in accordance with the present invention, the cooking oven 1 comprises exhaust
means (designated as a whole by reference numeral 20 in Fig. 1), associated with an
aperture 3A in the muffle 3, for drawing air from within said muffle 3 and exhausting
it outside the oven 1, said exhaust means 20 comprising a first channel 21 obtained
on an upper portion of said delivery duct 12 for carrying the air coming from said
aperture 3A, said first channel 21 being associated with a second channel 22 obtained
on an upper portion of said delivery duct 12 and adapted to draw at least one portion
of the air processed by said fan 11.
[0040] Preferably, said at least one portion of air drawn by the second channel 22 amounts
to 10% to 20%, more preferably 13% to 15%, of the air flow processed by the fan 11.
This facilitates the outflow of the cooking fumes present inside the muffle 3 without
requiring the use of a dedicated fan.
[0041] The exhaust means 20 according to the present invention allow the air flow drawn
from within said muffle 3 to be kept separate from the air flow blown into said first
interspace 6A by the cooling system 10.
[0042] The fact that the two air flows are kept separate from each other allows the door
4 to be designed in a manner such that is offers adequate visibility of the muffle
3 and of the foods contained therein, in particular because such a design prevents
said first interspace 6A from getting fouled, thus avoiding the need to carry out
difficult cleaning operations. The exhaust means 20 are so conceived as to release
the air taken from within said muffle 3 above an upper edge 4A of the door 4, preferably
in a space S obtained between the upper edge 4A of the door 4 and a lower region 41
of a front panel 40.
[0043] The distance between the lower region 41 of the front panel 40 and the upper edge
4A of the door 4 may be very small, indicatively comprised between approx. 2 mm and
approx. 6 mm, so as to create a nearly continuous surface between the front panel
40 and the door 4, leading to advantages in terms of exterior appearance and ease
of cleaning of the cooking oven 1.
[0044] Preferably said second channel 22 has a restriction 22A upstream of an intersection
with said first channel 21, so as to cause a depression through the Venturi effect
near said intersection and enhance the drawing of air from within said muffle 3; this
advantageously facilitates the discharge of the air taken from within the muffle 3
and present in the first channel 21. Furthermore, the air taken from within the muffle
3 is dragged by the air flow tapped by the fan 11 into a third channel 23 obtained
on an upper portion of said delivery duct 12 and located downstream of the intersection
between the first 21 and second 22 channels.
[0045] The air present in said third channel 23 then flows through at least one outlet 24
(shown in particular in Figs. 1 and 6) and is released into said space S.
[0046] As can be observed in particular in Figs. 1, 4a, 5 and 6, said exhaust means 20 comprise
a cover 25 adapted to be associated with said upper portion of the delivery duct 12
in a manner such as to enclose said first 21, second 22 and third 23 channels.
[0047] Figs. 1 and 5 also show that the exhaust means 20 according to the present invention
further comprise:
- a diverter element 26, in particular wedge-shaped, positioned in said third channel
23 to divert the air flow towards said at least one outlet 24. The diverter element
26 is preferably fitted in by laying it onto the delivery duct 12 and by securing
the cover 25 to said upper portion of the delivery duct 12, said cover 25 being secured
by vibration or ultrasonic welding. The diverter element 26 thus gets trapped and
remains permanently positioned in its seat. Alternatively, the diverter element 26
may be obtained in one piece with the delivery duct 12 or the cover 25;
- a tubular element 27 associated with the aperture 3A in the muffle 3 and adapted to
pass through a hole 14 (visible in Figs. 1, 2a and 5) in the delivery duct 12 for
allowing the air drawn from within the muffle 3 to reach said first channel 21.
[0048] Between the tubular element 27 and the first channel 21 an actuator may be interposed
(not shown in the drawings), such as a butterfly valve, for regulating, in particular
during a cooking cycle, the time periods in which the cooking fumes are evacuated
outside the cooking oven 1 and those in which the muffle 3 is kept airtight.
[0049] In addition, the upper portion of the delivery duct 12 comprises a plurality of coupling
means 30 for securing some functional elements of the cooking oven 1 to said delivery
duct 12. Said functional elements are shown schematically in Fig. 6 and may comprise
one or more of the following elements: an electronic board 31, an interface board
32, a door lock device 33 for locking the door 4, and so on.
[0050] Preferably, said coupling means 30 are obtained during the same moulding operation
carried out for manufacturing the delivery duct 12, which is made of plastic material.
[0051] If the cooking oven 1 must include a microwave generator for at least one microwave-based
or microwave-aided cooking cycle, the door 4 may internally comprise at least one
protective shield to prevent it from being crossed by microwaves, and the cooking
oven 1 comprises a safety switch (riot shown in the drawings) adapted to automatically
turn off the microwave generator when the door 4 is opened. The safety switch is advantageously
secured to the cooking oven 1 by constraining it to the delivery duct 12 through coupling
means 30.
[0052] It must be stressed that the provision of the coupling means 30 (such as turrets
or seats) obtained in one piece with the plastic delivery duct 12 is per se to be
considered as an invention, regardless of any additional features of the delivery
duct 12 and of the cooking oven 1. This provision makes assembling the cooking oven
1 considerably simpler, while reducing the number of components and hence the costs
thereof. Moreover, the functional components are positioned more accurately and are
secured in a safer and more reliable manner compared to the prior art.
[0053] As far as the cooling system 10 is concerned, it is so designed as to generate a
downward-directed forced air flow within said first interspace 6A; in fact, said forced
air flow passes through said at least one slot 12A and is then directed from the upper
edge 4A to a lower edge 4B of the door 4.
[0054] The fact that the air flow within said first interspace 6A has a downward direction
is particularly advantageous because said air flow can adequately cool the upper edge
4A of the door 4, which is the one with which the user is more likely to come accidentally
in contact, since it is near the front panel 40 where the interface devices of the
cooking oven 1 are located (not shown in the drawings).
[0055] Preferably said upper edge 4A is associated with a conveying element 9A adapted to
convey the air flow coming from the cooling system 10 into the first interspace 6A
and/or the second interspace 6B.
[0056] Said conveying element 9A has a profile so shaped as to change the direction of the
air flow coming from the cooling system 10 by about 90°. The conveying element 9A
may be associated with the door 4 at the inlet section of the first interspace 6A,
or it may be associated with any other component of the cooking oven 1 at the outlet
section of the delivery duct 12.
[0057] Moreover, the lower edge 4B comprises deflector means 9B associated with said first
5A and second 5B panes, said deflector means 9B being bent in a direction opposite
to the muffle 3; the provision of the deflector means 9B allows the air flow coming
from said first interspace 6A and/or said second interspace 6B to be directed towards
an external portion of the oven 1, in particular a portion thereof being external
to said door 4. Advantageously, the flow is diverted in a manner such that it has
at least one horizontal motion component.
[0058] Said deflector means 9B comprise a pair of deflectors, each of which may consist
of a specific element applied to the structure of the door 4 or obtained by appropriately
shaping a structural element of the door 4. As an alternative, the deflector means
9B may be provided by means of a single element having contemporarily the functions
of securing the first pane 5A, diverting the flow coming from the first interspace
6A, and also, advantageously, collecting any condensate forming on the first pane
5A.
[0059] The advantages of a cooking oven, in particular for household use, according to the
present invention are apparent from the above description.
[0060] In particular, the special design of the delivery duct 12 and of the fixing means
100 according to the present invention allows to provide a cooling system for a cooking
oven 1, in particular for household use, which is economical to produce and which
requires no manual intervention for welding the delivery duct 12 to the remaining
components of the cooking oven 1.
[0061] The special design of the delivery duct 12 and of the fixing means 100 according
to the present invention also provides a cooling system for a cooking oven which is
effective even though it is made up of low-cost parts, and which can be easily assembled
when manufacturing the cooking oven as well as easily disassembled in order to, for
example, gain access to internal components of said system during repair, replacement
or maintenance operations.
[0062] Furthermore, the delivery duct 12 and the fixing means 100 designed in accordance
with the present invention ensure minimal plays between the delivery duct 12 and the
plate 50 in both the vertical and longitudinal directions; as a consequence, in addition
to making it easier to couple the delivery duct 12 to the plate 50, this design also
allows to compensate for any construction tolerances of said delivery duct 12 and
said plate 50.
[0063] Also, the fact that the fixing means 100 are distributed sideways relative to a longitudinal
axis A of the cooking oven 1 ensures adequate sealing of the delivery duct 12.
[0064] The fact that the region of the plate 50 where said at least one through hole 52
is obtained is so designed as to comprise an emboss allows both reinforcing the plate
50 in the region where it couples to the delivery duct 12 and making each elastic
tab 101 sufficiently long to ensure adequate elasticity.
[0065] Another advantage of the cooking oven according to the present invention is that
the particular design of the tooth 102, which comprises a striker surface 103, ensures
adequate grip of the tooth 102 and an optimal coupling between the delivery duct 12
and the plate 50. In addition, the particular size of the angle β formed between each
elastic tab 101 and the delivery duct 12 allows the elastic tab 101 to become elastically
deformed in an optimal manner and to be easily inserted into the through hole 52.
[0066] The fact that the air flow taken from within said muffle 3 is kept separate from
the air flow blown into said first interspace 6A allows to make a door 4 which ensures
adequate visibility of the muffle 3 and of the foods contained therein, and wherein
said first interspace 6A will not get fouled. As a consequence, such a design avoids
having to carry out difficult cleaning operations.
[0067] A further advantage offered by the cooking oven according to the present invention
is that the particular design of the second channel 22 as previously described, i.e.
featuring a restriction 22A in the proximity of an intersection with said first channel
21, generates a Venturi effect that facilitates the drawing of air from within said
muffle 3; consequently, this significantly improves the discharge of the air taken
from within the muffle 3 and present in the first channel 21.
[0068] The discharge of the air taken from within the muffle 3 is then further facilitated
by the fact that it is dragged by the air flow tapped by the fan 11, i.e. along with
at least some of the air coming from said fan 11.
[0069] Another advantage of the cooking oven 1 according to the present invention is given
by the provision of a plurality of coupling means 30 on the upper portion of the delivery
duct 12; in fact, said coupling means 30 allow a number of functional elements of
the cooking oven 1 to be optimally secured to said delivery duct 12.
[0070] A further advantage is that said cooling system 10 allows to generate a downward-directed
air flow within said first interspace 6A, i.e. an air flow directed from the upper
edge 4A to the lower edge 4B of the door 4; advantageously, such a design ensures
proper cooling of the upper edge 4A of the door 4, which is the most dangerous one
because it is the one with which the user is more likely to come accidentally in contact.
[0071] As a result, the special design of the cooking oven 1 according to the present invention
allows the door 4 to be very efficient in terms of thermal insulation and cooling
of its outer surface.
[0072] Moreover, the particular design of the cooking oven 1 according to the invention
offers the additional advantage that it only uses one fan 11 for drawing air from
the muffle 3 and exhausting it above the upper edge 4A of the door 4 as well as for
blowing a forced air flow into the first interspace 6A.
[0073] The cooking oven described herein by way of example may be subject to many possible
variations without departing from the novelty spirit of the inventive idea; it is
also clear that in the practical implementation of the invention the illustrated details
may have different shapes or be replaced with other technically equivalent elements.
[0074] It can therefore be easily understood that the present invention is not limited to
the above-described cooking oven, in particular for household use, but may be subject
to many modifications, improvements or replacements of equivalent parts and elements
without departing from the inventive idea, as clearly specified in the following claims.
1. A cooking oven (1), in particular for household use, of the type comprising:
a cabinet (2) comprising a muffle (3) adapted to be closed by a door (4),
a first (5A) and a second (5B) panes adapted to create at least a first interspace
(6A) in said door (4),
- a cooling system (10) comprising a fan (11) and a delivery duct (12) adapted to
blow air into said first interspace (6A),
characterized in that
said cooking oven (1) comprises fixing means (100) for snap-coupling the delivery
duct (12) to a plate (50) of the oven structure, the latter being in particular adapted
to be coupled to the bottom of said delivery duct (12), and
in that said cooking oven (1) further comprises a plurality of coupling means (30) on the
upper portion of the delivery duct (12).
2. A cooking oven (1) according to claim 1, characterized in that said fixing means (100) comprise at least one pair of elastic tabs (101) associated
with said delivery duct (12) and at least one through hole (52) obtained in said plate
(50).
3. A cooking oven (1) according to one or more of the preceding claims, characterized in that each elastic tab (101) has one tooth (102) which allows the delivery duct (12) to
be snap-coupled once there is no longer any interference between the tooth (102) and
the through hole (52), in particular a wall (53) of the through hole (52).
4. A cooking oven (1) according to claim 3, characterized in that said tooth (102) comprises a striker surface (103) which is substantially parallel
to the plate (50) when the elastic tab (101) is inserted in the through hole (52).
5. A cooking oven (1) according to one or more of the preceding claims, characterized in that said delivery duct (12) is made of plastic material and said elastic tabs (101) are
obtained when moulding the delivery duct (12).
6. A cooking oven (1) according to claim 5, characterized in that said delivery duct (12) is made of polyamide, said polyamide being in particular
reinforced with glass fibres.
7. A cooking oven (1) according to one or more of the preceding claims, characterized in that said plate (50) is made of sheet metal and said at last one through hole (52) is
obtained when pressing the plate (50).
8. A cooking oven (1) according to one or more of the preceding claims, characterized in that the region of said plate (50) where said at least one through hole (52) is obtained
comprises an emboss, said emboss being in particular sheared in a manner such that
support surfaces are generated for the elastic tabs (101) and/or for the teeth (102).
9. A cooking oven (1) according to one or more of the preceding claims, characterized in that each elastic tab (101) is made in a manner such that it forms an angle (β) with the
delivery duct (12), said angle (β) being between 45° and 80°, preferably between 72°
and 77°, more preferably of approximately 76°.
10. A cooking oven (1) according to claim 1, characterized in that said fixing means (100) are arranged symmetrically relative to a longitudinal axis
(A) of the cooking oven (1) and/or are at least three per side, advantageously five
per side.
11. A cooking oven (1) according to one or more of the preceding claims, characterized in that functional elements are secured to said delivery duct (12) by means of said coupling
means (30).
12. A cooking oven (1) according to claim 11, wherein said functional elements comprise
an electronic board (31) and/or an interface board (32) and/or a door lock device
(33).
13. A cooking oven (1) according to claim 11 or 12, including a microwave generator and
a safety switch adapted to automatically turn off the microwave generator when the
door (4) is open, wherein said functional elements comprise said safety switch.
14. A cooking oven (1) according to one or more of the preceding claims, wherein said
coupling means (30) are obtained during the same moulding operation carried out for
manufacturing the delivery duct (12).
15. A cooking oven (1) according to one or more of the preceding claims, wherein said
coupling means (30) are turrets and/or seats.
1. Backofen (1), insbesondere zur Verwendung im Haushalt, des Typs umfassend:
- ein Gehäuse (2), umfassend eine Muffel (3), welches dazu eingerichtet ist, von einer
Tür (4) verschlossen zu werden,
- eine erste (5A) und eine zweite (5B) Scheibe, welche dazu eingerichtet sind, in
der Tür (4) wenigstens einen ersten Zwischenraum (6A) zu erzeugen,
- ein Kühlsystem (10), umfassend ein Gebläse (11) und eine Zufuhrleitung (12), welches
dazu eingerichtet ist, Luft in den ersten Zwischenraum (6A) einzublasen,
dadurch gekennzeichnet, dass
der Backofen (1) Befestigungsmittel (100) zum Schnappverbinden der Zufuhrleitung (12)
an eine Platte (50) der Ofenstruktur umfasst, wobei letztere insbesondere dazu eingerichtet
ist, mit dem Boden der Zufuhrleitung (12) gekoppelt zu werden, und dass der Backofen
(1) ferner eine Mehrzahl von Kopplungsmitteln (30) an dem oberen Abschnitt der Zufuhrleitung
(12) umfasst.
2. Backofen (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Befestigungsmittel (100) wenigstens ein Paar von elastischen Vorsprüngen (101)
umfassen, welche der Zufuhrleitung (12) zugeordnet sind, sowie wenigstens ein in der
Platte (50) erhaltenes Durchgangsloch (52).
3. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder elastische Vorsprung (101) einen Zahn (102) aufweist, welcher erlaubt, die
Zufuhrleitung (12) durch Einschnappen zu verbinden, sobald kein Zusammenwirken zwischen
dem Zahn (102) und dem Durchgangsloch (52) mehr vorliegt, insbesondere einer Wand
(53) des Durchgangslochs (52).
4. Backofen (1) nach Anspruch 3, dadurch gekennzeichnet, dass der Zahn (102) eine Gegenfläche (103) umfasst, welche im Wesentlichen parallel zu
der Platte (50) ist, wenn der elastische Vorsprung (101) in das Durchgangsloch (52)
eingefügt ist.
5. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zufuhrleitung (12) aus einem Kunststoffmaterial hergestellt ist und die elastischen
Vorsprünge (101) erhalten werden, wenn die Zufuhrleitung (12) gegossen wird.
6. Backofen (1) nach Anspruch 5, dadurch gekennzeichnet, dass die Zufuhrleitung (12) aus Polyamid hergestellt ist, welches Polyamid vorzugsweise
mit Glasfasern verstärkt ist.
7. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Platte (50) aus Metallblech hergestellt ist und das wenigstens eine Durchgangsloch
(52) erhalten wird, wenn die Platte (50) gestanzt wird.
8. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Bereich der Platte (50), wo das wenigstens eine Durchgangsloch (52) erhalten
wird, eine Prägung umfasst, welche Prägung insbesondere derart angeschrägt ist, dass
Trageflächen für die elastischen Vorsprünge (101) oder/und für die Zähne (102) erzeugt
werden.
9. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder elastische Vorsprung (101) in einer derartigen Weise hergestellt ist, dass
er einen Winkel (β) mit der Zufuhrleitung (12) bildet, wobei der Winkel (β) zwischen
45° und 80° beträgt, vorzugsweise zwischen 72° und 77°, weiter bevorzugt etwa 76°.
10. Backofen (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Befestigungsmittel (100) symmetrisch bezüglich einer Längsachse (A) des Backofens
(1) oder/und zu wenigstens drei pro Seite, vorteilhafterweise fünf pro Seite, angeordnet
sind.
11. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass funktionelle Elemente mittels der Kopplungsmittel (30) an die Zufuhrleitung (12)
gesichert sind.
12. Backofen (1) nach Anspruch 11, wobei die funktionellen Elemente eine Elektronikplatine
(31) oder/und eine Schnittstellenplatine (32) oder/und eine Türverriegelungsvorrichtung
(33) umfassen.
13. Backofen (1) nach Anspruch 11 oder 12, umfassend einen Mikrowellen-Generator und einen
Sicherheitsschalter, welcher dazu eingerichtet ist, den Mikrowellen-Generator automatisch
auszuschalten, wenn die Tür (4) offen ist, wobei die funktionellen Elemente den Sicherheitsschalter
umfassen.
14. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Kopplungsmittel
(30) während des selben Gießvorgangs erhalten werden, der zum Herstellen der Zufuhrleitung
(12) durchgeführt wird.
15. Backofen (1) nach einem oder mehreren der vorhergehenden Ansprüche, wobei die Kopplungsmittel
(30) Türme oder/und Sitze sind.
1. Four de cuisson (1), en particulier à usage domestique, du type comprenant :
- une enceinte (2) comprenant un moufle (3) adaptée pour être fermée par une porte
(4),
- un premier (5A) et un second (5B) panneau adaptés pour créer au moins un premier
espace intermédiaire (6A) dans ladite porte (4),
- un système de refroidissement (10) comprenant un ventilateur (11) et une gaine d'amenée
(12) adapté pour souffler de l'air à l'intérieur dudit premier espace intermédiaire
(6A),
caractérisé en ce que
ledit four de cuisson (1) comprend des moyens de fixation (100) pour un accouplement
encliquetable de la gaine d'amenée (12) à la plaque (50) de la structure du four,
cette dernière étant en particulier adaptée pour être couplée à la base de ladite
gaine d'amenée (12), et
en ce que ledit four de cuisson (1) comprend en outre une pluralité de moyens de couplage (30)
sur la portion supérieure de la gaine d'amenée (12).
2. Four de cuisson (1) selon la revendication 1, caractérisé en ce que lesdits moyens de fixation (100) comprennent au moins une paire de pattes élastiques
(101) associée à ladite gaine d'amenée (12) et au moins un trou traversant (52) obtenu
dans ladite plaque (50).
3. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que chaque patte élastique (101) comporte une dent (102) qui permet à la gaine d'amenée
(12) d'être accouplée par encliquetage une fois qu'il n'y a plus aucune interférence
entre la dent (102) et le trou traversant (52), en particulier une cloison (53) du
trou traversant (52).
4. Four de cuisson (1) selon la revendication 3, caractérisé en ce que ladite dent (102) comprend une surface de marteau (103) qui est sensiblement parallèle
à la plaque (50), lorsque la patte élastique (101) est insérée dans le trou traversant
(52).
5. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite gaine d'amenée (12) est constituée de matériau plastique et lesdites pattes
élastiques (101) sont obtenues lors du moulage de la gaine d'amenée (12).
6. Four de cuisson (1) selon la revendication 5, caractérisé en ce que ladite gaine d'amenée (12) est constituée de poly(amide), ledit poly(amide) étant
en particulier renforcé de fibres de verre.
7. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite plaque (50) est constituée de tôle et ledit au moins un trou traversant (52)
est obtenu lors du pressage de la plaque (50).
8. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que la région de ladite plaque (50) où ledit au moins un trou traversant (52) est obtenu,
comprend un gaufrage, ledit gaufrage étant en particulier cisaillé de sorte que des
surfaces de support soient générées pour les pattes élastiques (101) et/ou pour les
dents (102).
9. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que chaque patte élastique (101) est constituée de sorte qu'elle forme un angle (β) avec
la gaine d'amenée (12), ledit angle (β) étant entre 45° et 80°, de préférence entre
72° et 77°, de manière davantage préférée d'approximativement 76°.
10. Four de cuisson (1) selon la revendication 1, caractérisé en ce que lesdits moyens de fixation (100) sont agencés symétriquement par rapport à un axe
longitudinal (A) du four de cuisson (1) et/ou sont au moins trois par côté, avantageusement
cinq par côté.
11. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, caractérisé en ce que des éléments fonctionnels sont arrimés à ladite gaine d'amenée (12) au moyen desdits
moyens de couplage (30).
12. Four de cuisson (1) selon la revendication 11, dans lequel lesdits éléments fonctionnels
comprennent une carte électronique (31) et/ou une carte d'interface (32) et/ou un
dispositif de verrouillage de porte (33).
13. Four de cuisson (1) selon la revendication 11 ou 12, comprenant un générateur de micro-ondes
et un interrupteur de sécurité adapté pour éteindre automatiquement le générateur
de micro-ondes lorsque la porte (4) est ouverte, dans lequel lesdits éléments fonctionnels
comprennent ledit interrupteur de sécurité.
14. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, dans lequel
lesdits moyens de couplage (30) sont obtenus lors de la même opération de moulage
réalisée pour fabriquer la gaine d'amenée (12).
15. Four de cuisson (1) selon une ou plusieurs des revendications précédentes, dans lequel
lesdits moyens de couplage (30) sont des tourelles et/ou des sièges.