COOKING OVEN

Description

[0001] The present invention relates to a cooking oven including at least one oven cavity according to the preamble of claim 1.

[0002] An oven cavity of a cooking oven is usually wrapped by an insulating layer. Said insulating layer keeps the thermal energy inside the oven cavity on the one hand and allows a low temperature outside the oven cavity on the other hand. However, the insulating layer requires a lot of material. Further, the insulating layer increases the volume of the oven cavity, so that a lot of space is required.

[0003] US 2,116,669 discloses a cooking oven with an oven cavity. A cavity wall of said oven cavity is enclosed by an insulation. An outer shell encloses the oven cavity and the insulation. Frame elements are arranged between the insulation and the corresponding cavity walls. Said frame elements are provided for retaining the insulation in place, when the oven cavity is removed from the outer shell of the cooking oven.

[0004] It is an object of the present invention to provide a cooking oven with an oven cavity, which comprises an improved insulation by low complexity.

[0005] The object is achieved by the cooking oven according to claim 1.

[0006] According to the present invention, the cooking oven comprises at least one oven cavity, wherein:

• the oven cavity comprises a cavity wall enclosing an interior space of said oven cavity,
• the cavity wall includes two side walls, a top wall, a bottom wall and a rear wall,
• the cavity wall is enclosed by at least one insulating layer,
• at least one air spacer is arranged between the insulating layer and at least one corresponding wall of the cavity wall,

and wherein:

• the air spacer is aligned at the corresponding wall of the cavity wall,
• the air spacer includes at least one plane portion arranged parallel to the corresponding wall of the cavity wall,
• the air spacer includes at least one flange enclosing the plane portion of said air spacer,
• the flange extends from the plane portion towards the cavity wall,
• the air spacer is formed as a shell and covers a plane part of the cavity wall,
• at least one air chamber is formed between the air spacer and said plane part of the corresponding wall of the cavity wall, and
• the air chamber provides static air between the cavity wall and the air spacer.

[0007] The core of the present invention is the air chamber with static air between the cavity wall and the insulating layer. Static air is a very good insulating material and improves the thermal insulation of the oven cavity by low complexity.

[0008] Preferably, at least one air spacer is arranged at each side wall of the cavity wall.

[0009] In particular, the at least one air spacer may extend over a complete plane portion of the corresponding wall of the cavity wall.

[0010] Preferably, the flange enclosing the plane portion of the air spacer tends perpendicular to the plane portion of the air spacer.

[0011] The air spacer is formed as a shell. Moreover, the air spacer may be formed as a single-piece part.

[0012] In a further embodiment, the air spacer includes one or more spacer elements extending from the plane portion of said air spacer towards the corresponding wall of the cavity wall. The spacer elements ensure the desired distance between the spacer element and the cavity wall. Preferably, the one or more spacer elements have the same height as the flange.

[0013] Furthermore, at least one spacer element may be an embossment in the plane portion of the air spacer, wherein preferably the contact surface between the spacer elements and the corresponding wall of the cavity wall is minimised.

[0014] For example, the air spacer may be made of aluminium, wherein preferably edges of the air spacer carry a sealing made of material having low heat conductivity and being in contact to the corresponding wall of the cavity wall.

[0015] In another embodiment, the air spacer is made of a dielectric or non-metallic material, wherein said air spacer is coated by a reflective aluminium layer directed towards and/or away from the corresponding wall of the cavity wall, and wherein preferably edges of the air spacer carry a sealing made of material having low heat conductivity and being in contact to the corresponding wall of the cavity wall.

[0016] Moreover, the air spacer may be made of a compressed insulating material, wherein preferably edges of the air spacer are in direct contact to the corresponding wall of the cavity wall.

[0017] Further, the air spacer may be made of a synthetic material, wherein preferably edges of the air spacer are in direct contact to the corresponding wall of the cavity wall.

[0018] In particular, the insulating layer is made of a conventional insulating, preferably stone wall.

[0019] Novel and inventive features of the present invention are set forth in the appended claims.

[0020] The present invention will be described in further detail with reference to the drawing, in which

FIG 1

illustrates a schematic partial sectional view of a side wall of an oven cavity according to a preferred embodiment of the present invention,

FIG 2

illustrates a schematic perspective view of the oven cavity according to the preferred embodiment of the present invention,

FIG 3

illustrates a schematic sectional perspective view of an air spacer at the lateral cavity wall of the oven cavity according to the preferred embodiment of the present invention, and

FIG 4

illustrates a schematic detailed sectional perspective view of the air spacer at the lateral cavity wall of the oven cavity according to the preferred embodiment of the present invention.

[0021] FIG 1 illustrates a schematic partial sectional view of a side wall of an oven cavity 12 according to a preferred embodiment of the present invention.

[0022] The oven cavity 10 comprises a cavity wall 12 enclosing an interior space 14 of the oven cavity 10. Usually, the cavity wall 12 includes two side walls, a top wall, a bottom wall and a rear wall. In this example, a partial sectional view of the side wall is shown. The cavity wall 12 is enclosed by an insulating layer 20.

[0023] An air chamber 16 is arranged between the cavity wall 12 and the insulating layer 20. The air chamber 16 is formed by an air spacer 18. The air spacer 18 includes a plane portion 22 and a flange 24. Said flange 24 encloses the border of the plane portion 22. The flange 24 extends perpendicular to the plane portion 22. Further, the flange 24 extends from the plane portion 22 towards the cavity wall 12. In this example, all edges of the air spacer 18 are directed towards the cavity wall 12. Said edges form the open end of the flange 24. The plane portion 22 of the air spacer 18 is arranged parallel to the cavity wall 12. The air chamber 16 is enclosed by the plane portion 22 and flange 24 of the air spacer 18 on the one hand and by the cavity wall 12 on the other hand. The air spacer 18 is formed as a shell and covers a plane part of the cavity wall 12. Preferably, the part of the cavity wall 12 covered by the air spacer 18 is as large as possible. A flat air layer is formed at the outer side of the cavity wall 12.

[0024] The air chamber 16 provides static air between the cavity wall 12 and the insulating layer 20. Static air is a very good insulating material and improves the thermal insulation of the oven cavity 10 by low complexity. The air spacer 18 is tightly attached at the cavity wall 12, so that the air chamber 16 is airtight and the air in the air chamber 16 does not circulate.

[0025] Preferably, the air spacer 18 is made of aluminium. The air spacer 18 is as thin as possible in order to obtain a sufficient stiffness. The air spacer 18 may keep the insulating layer 20 at a distance from the cavity wall 12. In general, the air spacer 18 may be made of any suitable material. For example, the air spacer 18 is formed by compressed insulating material, e.g. stone wool. Further, the air spacer 18 may be formed of synthetic material. The insulating layer 20 is made of stone wool or another conventional insulating layer.

[0026] The air spacer 18 made of aluminium is heat resistant at temperatures of 450°C to 500°C. Such temperatures may occur during a pyrolytic cleaning operation. Further, the air spacer 18 made of aluminium reflects heat back to the oven cavity 10. Moreover, the air spacer 18 may be formed of a dielectric or non-metallic material and coated by a reflective aluminium layer directed towards and/or away from the oven cavity 10.

[0027] If the material of the air spacer 18 has low heat conductivity, then the edges of the air spacer 18 may directly contact the cavity wall 12. However, if the material of the air spacer 18 has high heat conductivity, then a sealing 28 made of a material with low heat conductivity is arranged between the edges of the air spacer 18 and the cavity wall 12. In this case, the edges of the air spacer 18 may carry a sealing 28 made of the material with low heat conductivity. For example, the edges of the air spacer 18 carry a graphite gasket contacting the cavity wall 12.

[0028] Additionally, one or more spacer elements 26 may be arranged between the plane portion 22 of the air spacer 18 and the cavity wall 12. Preferably, the spacer elements 26 have the same heights as the flange 24 of the air spacer 18. The spacer elements 26 contribute to a sufficient stiffness of the air spacer 18, so that the desired distance between the plane portion 22 of the air spacer 18 and the cavity wall 12 is ensured. For example, the spacer elements 26 are embossments 26 in the plane portion 22 of the air spacer 18, wherein preferably the contact surface between the spacer elements 26 and the cavity wall 12 are minimised.

[0029] FIG 2 illustrates a schematic perspective view of the oven cavity 10 according to the preferred embodiment of the present invention. In this example, the air spacer 18 is attached at the both lateral cavity walls 12 of the oven cavity 10. In general, the air spacer 18 may be attached at the top cavity wall, the bottom cavity wall, the rear cavity wall and/or the lateral cavity walls 12 of the oven cavity 10. For clarity, the insulating layer 20 enclosing the oven cavity 10 is not shown in FIG 2. Said insulating layer 20 may partially or completely enclose the oven cavity 10.

[0030] The air spacer 18 includes the plane portion 22 and the flange 24, wherein said flange 24 encloses the border of the plane portion 22. Preferably, the air spacer 18 with the plane portion 22 and the flange 24 is formed as a single-piece part. The flange 24 extends perpendicular to the plane portion 22. Further, the flange 24 extends from the plane portion 22 towards the cavity wall 12. In this example, all edges of the air spacer 18 are directed towards the cavity wall 12. Said edges form the open end of the flange 24. The plane portion 22 of the air spacer 18 is arranged parallel to the cavity wall 12. The air chamber 16 is enclosed by the plane portion 22 and flange 24 of the air spacer 18 on the one hand and by the cavity wall 12 on the other hand. The air spacer 18 is formed as the shell and covers the planar part of the lateral cavity wall 12. Preferably, the part of the cavity wall 12 covered by the air spacer 18 is as large as possible. The flat air layer is formed at the outer side of the lateral cavity wall 12.

[0031] FIG 3 illustrates a schematic sectional perspective view of an air spacer 18 at the lateral cavity wall 12 of the oven cavity 10 according to the preferred embodiment of the present invention. For clarity, the insulating layer 20 enclosing partially or completely the oven cavity 10 is not shown in FIG 3.

[0032] The flange 24 encloses the border of the plane portion 22 and extends perpendicular to said plane portion 22. Further, the flange 24 extends from the plane portion 22 towards the cavity wall 12. In this example, all edges of the air spacer 18 are directed towards the cavity wall 12, wherein said edges form the open end of the flange 24. The plane portion 22 of the air spacer 18 extends parallel to the lateral cavity wall 12. The air chamber 16 is enclosed by the plane portion 22 and flange 24 of the air spacer 18 on the one hand and by the cavity wall 12 on the other hand. The air spacer 18 is formed as the shell and covers the planar part of the lateral cavity wall 12. Preferably, the part of the cavity wall 12 covered by the air spacer 18 is as large as possible. The flat air layer is formed at the outer side of the lateral cavity wall 12.

[0033] In this example, the embossments 26 are formed in the plane portion 22 of the air spacer 18. Said embossments 26 act as spacer elements. The embossments 26 contribute to the sufficient stiffness of the air spacer 18, so that the desired distance between the plane portion 22 of the air spacer 18 and the cavity wall 12 is ensured.

[0034] FIG 4 illustrates a schematic detailed sectional perspective view of the air spacer 18 at the lateral cavity wall 12 of the oven cavity 10 according to the preferred embodiment of the present invention. For the purposes of clarity, the insulating layer 20 enclosing partially or completely the oven cavity 10 is not shown in FIG 4.

[0035] Preferably, the embossments 26 are formed in such a way that the contact surfaces between said embossments 26 and the cavity wall 12 are minimised. The small contact surface between the embossments 26 and the cavity wall 12 minimises the heat transfer from the cavity wall 12 to the plane portion 22 of the air spacer 18.

[0036] Further, a sealing 28 is arranged between the edges of the air spacer 18 and the cavity wall 12. The edges of the air spacer 18 are formed by the open end of the flange 24. The sealing 28 is made of material with low heat conductivity. For example, the sealing 28 is made of silicone or graphite. Alternatively, if the material of the air spacer 18 has low heat conductivity, then the edges of the air spacer 18 may directly contact the cavity wall 12.

[0037] The oven cavity 10 according to the present invention allows an improved thermal insulation by low complexity. The air spacer 18 has a simple structure and provides efficient heat insulation. The shape of the air spacer 18 allows a stable distance between the plane portion 22 of the air spacer 18 and the cavity wall 12.

List of reference numerals

[0038] 

10

oven cavity

12

cavity wall

14

interior space of the oven cavity

16

air chamber

18

air spacer

20

insulating layer

22

plane portion

24

flange

26

embossment

28

sealing

Claims

1. A cooking oven comprising at least one oven cavity (10), wherein:

- the oven cavity (10) comprises a cavity wall (12) enclosing an interior space (14) of said oven cavity (10),

- the cavity wall (12) includes two side walls, a top wall, a bottom wall and a rear wall,

- the cavity wall (12) is enclosed by at least one insulating layer (20),

- at least one air spacer (18) is arranged between the insulating layer (20) and at least one corresponding wall of the cavity wall (12),

characterised in that

- the air spacer (18) is aligned at the corresponding wall of the cavity wall (12),

- the air spacer (18) includes at least one plane portion (22) arranged parallel to the corresponding wall of the cavity wall (12),

- the air spacer (18) includes at least one flange (24) enclosing the plane portion (22) of said air spacer (18),

- the flange (24) extends from the plane portion (22) towards the cavity wall (12),

- the air spacer (18) is formed as a shell and covers a plane part of the cavity wall (12),

- one air chamber (16) is formed between the at least one air spacer (18) and said plane part of the corresponding wall of the cavity wall (12), and

- the air chamber (16) provides static air between the cavity wall (12) and the air spacer (18).

2. The cooking oven according to claim 1,
characterised in that
at least one air spacer (18) is arranged at each side wall of the cavity wall (12).

3. The cooking oven according to claim 1 or 2,
characterised in that
the at least one air spacer (18) extends over a complete plane portion of the corresponding wall of the cavity wall (12) .

4. The cooking oven according to any one of the preceding claims,
characterised in that
the flange (24) extends perpendicular to the plane portion (22) of the air spacer (18).

5. The cooking oven according to any one of the preceding claims,
characterised in that
the air spacer (18) is formed as a single-piece part.

6. The cooking oven according to any one of the preceding claims,
characterised in that
the air spacer (18) includes one or more spacer elements (26) extending from the plane portion (22) of said air spacer (18) towards the corresponding wall of the cavity wall (12).

7. The cooking oven according to claim 6 as far as related back to claim 4,
characterised in that
the one or more spacer elements (26) have the same height as the flange (24).

8. The cooking oven according to claim 6 or 7,
characterised in that
at least one spacer element (26) is an embossment (26) in the plane portion (22) of the air spacer (18), wherein preferably the contact surface between the spacer elements (26) and the corresponding wall of the cavity wall (12) is minimised.

9. The cooking oven according to any one of the preceding claims,
characterised in that
the air spacer (18) is made of aluminium, wherein preferably edges of the air spacer (18) carry a sealing (28) made of material having low heat conductivity and being in contact to the corresponding wall of the cavity wall (12).

10. The cooking oven according to any one of the claims 1 to 8,
characterised in that
the air spacer (18) is made of a dielectric or non-metallic material, wherein said air spacer (18) is coated by a reflective aluminium layer directed towards and/or away from the corresponding wall of the cavity wall (12), and wherein preferably edges of the air spacer (18) carry a sealing (28) made of material having low heat conductivity and being in contact to the corresponding wall of the cavity wall (12).

11. The cooking oven according to any one of the claims 1 to 8,
characterised in that
the air spacer (18) is made of a compressed insulating material, wherein preferably edges of the air spacer (18) are in direct contact to the corresponding wall of the cavity wall (12) .

12. The cooking oven according to any one of the claims 1 to 8,
characterised in that
the air spacer (18) is made of a synthetic material, wherein preferably edges of the air spacer (18) are in direct contact to the corresponding wall of the cavity wall (12).

13. The cooking oven according to any one of the preceding claims,
characterised in that
the insulating layer (20) is made of a conventional insulating, preferably stone wall.

Ansprüche

1. Garofen, umfassend mindestens einen Garraum (10), wobei:

- der Garraum (10) eine Innenraumwand (12) umfasst, die einen innenliegenden Raum (14) des Garraums (10) umschließt,

- die Innenraumwand (12) zwei seitliche Wände, eine obere Wand, eine untere Wand und eine hintere Wand beinhaltet,

- die Innenraumwand (12) von mindestens einer isolierenden Schicht (20) umschlossen ist,

- mindestens ein Luftabstandshalter (18) zwischen der isolierenden Schicht (20) und mindestens einer entsprechenden Wand der Innenraumwand (12) angeordnet ist,

dadurch gekennzeichnet, dass

- der Luftabstandshalter (18) an der entsprechenden Wand der Innenraumwand (12) ausgerichtet ist,

- der Luftabstandshalter (18) mindestens einen ebenen Abschnitt (22) beinhaltet, der parallel zu der entsprechenden Wand der Innenraumwand (12) angeordnet ist,

- der Luftabstandshalter (18) mindestens einen Bund (24) beinhaltet, der den ebenen Abschnitt (22) des Luftabstandshalters (18) umschließt,

- sich der Bund (24) von dem ebenen Abschnitt (22) in Richtung auf die Innenraumwand (12) erstreckt,

- der Luftabstandshalter (18) als eine Hülse ausgebildet ist und einen ebenen Teil der Innenraumwand (12) bedeckt,

- eine Luftkammer (16) zwischen dem mindestens einen Luftabstandshalter (18) und dem ebenen Teil der entsprechenden Wand der Innenraumwand (12) ausgebildet ist, und

- die Luftkammer (16) stehende Luft zwischen der Innenraumwand (12) und dem Luftabstandshalter (18) bereitstellt.

2. Garofen nach Anspruch 1,
dadurch gekennzeichnet, dass
mindestens ein Luftabstandshalter (18) an jeder Seitenwand der Innenraumwand (12) ausgebildet ist.

3. Garofen nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
sich der mindestens eine Luftabstandshalter (18) über einen vollständigen ebenen Abschnitt der entsprechenden Wand der Innenraumwand (12) erstreckt.

4. Garofen nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
sich der Bund (24) senkrecht zu dem ebenen Abschnitt (22) des Luftabstandshalters (18) erstreckt.

5. Garofen nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) als einstückiges Teil ausgebildet ist.

6. Garofen nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) ein oder mehrere Abstandshalterelemente (26) beinhaltet, die sich von dem ebenen Abschnitt (22) des Luftabstandshalters (18) in Richtung auf die entsprechende Wand der Innenraumwand (12) erstrecken.

7. Garofen nach Anspruch 6, sofern rückbezogen auf Anspruch 4,
dadurch gekennzeichnet, dass
das eine oder die mehreren Abstandshalterelemente (26) die gleiche Höhe wie der Bund (24) aufweisen.

8. Garofen nach Anspruch 6 oder 7,
dadurch gekennzeichnet, dass
mindestens ein Abstandshalterelement (26) eine Einprägung (26) in den ebenen Abschnitt (22) des Luftabstandshalters (18) ist, wobei bevorzugt die Kontaktfläche zwischen den Abstandshalterelementen (26) und der entsprechenden Wand der Innenraumwand (12) minimiert wird.

9. Garofen nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) aus Aluminium hergestellt ist, wobei bevorzugt Ränder des Luftabstandshalters (18) eine Abdichtung (28) tragen, die aus einem Material hergestellt ist, das eine geringe Wärmeleitfähigkeit aufweist, und in Kontakt mit der entsprechenden Wand der Innenraumwand (12) stehen.

10. Garofen nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) aus einem dielektrischen oder nichtmetallischen Material hergestellt ist, wobei der Luftabstandshalter (18) mit einer reflektierenden Aluminiumschicht beschichtet ist, die in Richtung auf die und/oder weg von der entsprechenden Wand der Innenraumwand (12) gerichtet ist, und wobei bevorzugt Ränder des Luftabstandshalters (18) eine Abdichtung (28) tragen, die aus einem Material hergestellt ist, das eine geringe Leitfähigkeit aufweist, und in Kontakt mit der entsprechenden Wand der Innenraumwand (12) stehen.

11. Garofen nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) aus einem komprimierten isolierenden Material hergestellt ist, wobei bevorzugt Ränder des Luftabstandshalters (18) in unmittelbarem Kontakt mit der entsprechenden Wand der Innenraumwand (12) stehen.

12. Garofen nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass
der Luftabstandshalter (18) aus einem Kunststoff hergestellt ist, wobei bevorzugt Ränder des Luftabstandshalters (18) in unmittelbarem Kontakt mit der entsprechenden Wand der Innenraumwand (12) stehen.

13. Garofen nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die isolierende Schicht (20) aus einer herkömmlichen isolierenden, bevorzugt einer Steinwand hergestellt ist.

Revendications

1. Four de cuisson comprenant au moins une cavité de four (10), dans lequel :

- la cavité de four (10) comprend une paroi de cavité (12) entourant un espace intérieur (14) de ladite cavité de four (10),

- la paroi de cavité (12) inclut deux parois latérales, une paroi supérieure, une paroi inférieure et une paroi arrière,

- la paroi de cavité (12) est entourée par au moins une couche isolante (20),

- au moins une pièce d'espacement à air (18) est agencée entre la couche isolante (20) et au moins une paroi correspondante de la paroi de cavité (12),

caractérisé en ce que

- la pièce d'espacement à air (18) est alignée sur la paroi correspondante de la paroi de cavité (12),

- la pièce d'espacement à air (18) inclut au moins une portion plane (22) agencée parallèlement à la paroi correspondante de la paroi de cavité (12),

- la pièce d'espacement à air (18) inclut au moins une bride (24) entourant la portion plane (22) de ladite pièce d'espacement à air (18),

- la bride (24) s'étend depuis la portion plane (22) vers la paroi de cavité (12),

- la pièce d'espacement à air (18) est sous forme d'enveloppe et couvre une partie plane de la paroi de cavité (12),

- une chambre à air (16) est formée entre l'au moins une pièce d'espacement à air (18) et ladite partie plane de la paroi correspondante de la paroi de cavité (12), et

- la chambre à air (16) fournit de l'air statique entre la paroi de cavité (12) et la pièce d'espacement à air (18).

2. Four de cuisson selon la revendication 1,
caractérisé en ce que
au moins une pièce d'espacement à air (18) est agencée sur chaque paroi latérale de la paroi de cavité (12).

3. Four de cuisson selon la revendication 1 ou 2,
caractérisé en ce que
l'au moins une pièce d'espacement à air (18) s'étend sur une portion plane complète de la paroi correspondante de la paroi de cavité (12).

4. Four de cuisson selon l'une quelconque des revendications précédentes,
caractérisé en ce que
la bride (24) s'étend perpendiculairement à la portion plane (22) de la pièce d'espacement à air (18).

5. Four de cuisson selon l'une quelconque des revendications précédentes,
caractérisé en ce que
la pièce d'espacement à air (18) est sous forme de pièce monobloc.

6. Four de cuisson selon l'une quelconque des revendications précédentes,
caractérisé en ce que
la pièce d'espacement à air (18) inclut un ou plusieurs éléments d'espacement (26) s'étendant à partir de la portion plane (22) de ladite pièce d'espacement à air (18) vers la paroi correspondante de la paroi de cavité (12).

7. Four de cuisson selon la revendication 6 du moment qu'elle dépend de la revendication 4,
caractérisé en ce que
les un ou plusieurs éléments d'espacement (26) ont la même hauteur que la bride (24).

8. Four de cuisson selon la revendication 6 ou 7,
caractérisé en ce que
au moins un élément d'espacement (26) est un bossage (26) dans la portion plane (22) de la pièce d'espacement à air (18), dans lequel, de préférence, la surface de contact entre les éléments d'espacement (26) et la paroi correspondante de la paroi de cavité (12) est minimisée.

9. Four de cuisson selon l'une quelconque des revendications précédentes,
caractérisé en ce que
la pièce d'espacement à air (18) est faite d'aluminium, dans lequel de préférence des bords de la pièce d'espacement à air (18) supportent un dispositif d'étanchéité (28) fait de matériau, ayant une faible conductivité thermique, et en contact avec la paroi correspondante de la paroi de cavité (12).

10. Four de cuisson selon l'une quelconque des revendications 1 à 8,
caractérisé en ce que
la pièce d'espacement à air (18) est faite d'un matériau diélectrique ou non métallique, dans lequel ladite pièce d'espacement à air (18) est enduite par une couche d'aluminium réfléchissante dirigée vers, et/ou éloignée de, la paroi correspondante de la paroi de cavité (12), et dans lequel, de préférence, des bords de la pièce d'espacement à air (18) supportent un dispositif d'étanchéité (28) fait de matériau, ayant une faible conductivité thermique, et en contact avec la paroi correspondante de la paroi de cavité (12).

11. Four de cuisson selon l'une quelconque des revendications 1 à 8,
caractérisé en ce que
la pièce d'espacement à air (18) est faite d'un matériau isolant comprimé, dans lequel, de préférence, des bords de la pièce d'espacement à air (18) sont en contact direct avec la paroi correspondante de la paroi de cavité (12).

12. Four de cuisson selon l'une quelconque des revendications 1 à 8,
caractérisé en ce que
la pièce d'espacement à air (18) est faite d'un matériau synthétique, dans lequel de préférence des bords de la pièce d'espacement à air (18) sont en contact direct avec la paroi correspondante de la paroi de cavité (12).

13. Four de cuisson selon l'une quelconque des revendications précédentes,
caractérisé en ce que
la couche isolante (20) est faite d'une paroi isolante conventionnelle, de préférence en pierre.

Drawing