WO2017097326A1

WO2017097326A1 - Gas oven having an improved chimney duct assembly

Info

Publication number: WO2017097326A1
Application number: PCT/EP2015/078826
Authority: WO
Inventors: Hakan Sarier; Davut Ayhan Serabatir
Original assignee: Arcelik Anonim Sirketi
Priority date: 2015-12-07
Filing date: 2015-12-07
Publication date: 2017-06-15
Also published as: WO2017097326A9; TR201615156A2

Abstract

The present invention relates to a gas oven (1) comprising: a chamber (2) for cooking food; a gas burner for heating the chamber (2); one or more apertures (3) which are each formed into the top wall (4) of the chamber (2); one or more chimney duct assemblies (5) each for discharging the flue gases through the aperture (3) to the outside. In the gas oven (1) of the present invention, the chimney duct assembly (5) comprises: a first chimney duct (6) for detachable attachment onto the top wall (4) around the respective aperture (3); a first attachment means (7) for detachably attaching the first chimney duct (6) to the top wall (4); a second chimney duct (8) for detachable attachment to the outlet (6a) of the first chimney duct (6); and a second attachment means (9) for detachably attaching the second chimney duct (8) to the first chimney duct (6).

Description

GAS OVEN HAVING AN IMPROVED CHIMNEY DUCT ASSEMBLY

The present invention relates to a cooking appliance, in particular to a gas oven.

Gas ovens are commonly known in the art. A gas oven generally comprises a chamber for cooking the food; a gas burner for heating the chamber by combusting the gas; and one or more chimney duct assemblies each for discharging the flue gases which are produced during the combustion of the gas to the outside. The gas oven generally has one or more apertures which are each formed into the top wall of the chamber and open into the respective chimney duct assembly.

A problem with the prior art gas oven is that the design and the production of the chimney duct assembly is a complicated task since it must appropriately match the capacity of the chamber and the gas burner in order to effectively discharge the flue gases to the outside. In general, gas ovens may have different capacities. For instance a gas oven for the US market commonly has a comparatively large chamber. In contrast thereto, a gas oven for the European market has a comparatively small chamber. However, the provision of the gas ovens with different chimney duct assemblies increases the production costs both in terms of labor and material.

WO2008/077967A1 discloses a gas oven.

An objective of the present invention is to provide a gas oven which solves the aforementioned problems of the prior art in a cost-effective way and which enables an improved production and assemblage of the chimney duct assembly without compromising the discharge of flue gases and the cooking performance of the gas oven.

This objective has been achieved by the gas oven as defined in claim 1. Further achievements have been attained by the subject-matters respectively defined in the dependent claims.

In the gas oven of the present invention, the chimney duct assembly comprises: a first chimney duct for the detachable attachment onto the top wall around the respective aperture; a first attachment means for detachably attaching the first chimney duct to the top wall; a second chimney duct for the detachable attachment to the outlet of the first chimney duct; and a second attachment means for detachably attaching the second chimney duct to the first chimney duct.

A major advantageous effect of the present invention is that the design and the production of the chimney duct assembly becomes easier and more cost effective through the first chimney duct and the second chimney duct which are serially and releasably connected to the chamber. Thus, the required capacity of the chimney duct assembly can be achieved by modifying at least one of the first chimney duct and the second chimney duct. Thereby, the costs of forming the dies for the chimney duct assembly can be reduced. Thereby, also the waste production can be reduced, and thus the production becomes more environment-friendly. Furthermore, the stock management can be improved.

In an embodiment, the first chimney duct is defined through a first main sheet metal and first cover sheet metal which are releasably fixed to each other through a first fixing means. In another embodiment, the first fixing means has a first releasable screw connection. These embodiments are particularly advantageous as the first chimney duct can be easily produced with the necessary height and cross section, and serially connected with one of various different second chimney ducts to obtain the required overall capacity for the discharge of the flue gases to the outside.

In another embodiment, the second chimney duct is defined through a second main sheet metal and second cover sheet metal which are releasably fixed to each other through a second fixing means. In another embodiment, the second fixing means has a second releasable screw connection. These embodiments are particularly advantageous as the second chimney duct can be easily produced with the necessary height and the necessary cross section, and serially connected with one of various different first chimney ducts to obtain the required overall capacity for the discharge of the flue gases to the outside.

In another embodiment, the first chimney duct extends solely upwards. In another embodiment, the first chimney duct has a rectangular cross section and a straight shape with top and bottom fixing flanges. These embodiments are particularly advantageous as the first chimney duct can be easily produced with the necessary height and the necessary cross section, and easily assembled with the chamber and the second chimney duct.

In another embodiment, the second chimney duct extends first rearwards and then upwards. In another embodiment, the first chimney duct has a rectangular cross section and an L-shape. These embodiments are particularly advantageous as the second chimney duct can be easily produced with the necessary height and the necessary cross section, and easily assembled with the first chimney duct.

In another embodiment, the second chimney duct has a baffle plate that reduces the flow rate of the flue gases. This embodiment is particularly advantageous as the flow of the flue gases can be reduced so as to reach the maximum temperature inside the chamber in a comparatively shorter time. Thereby, the energy efficiency and the cooking performance of the gas oven can be improved.

In another embodiment, the baffle plate is releasably inserted through a slot on the ceiling of the second chimney duct downwardly into the flow passage of the flue gases, and releasably fastened in place. In another embodiment, the fastening means comprises a third releasable screw connection. These embodiments are particularly advantageous as the baffle plate with the optimum size and shape can be retrofitted to the second chimney duct from the outside in accordance with the the required overall capacity for the discharge of the flue gases.

In another embodiment, the baffle plate is movable and continuously driven into or out of the second chimney duct through an electromechanical device so as to actively control the flow rate of the flue gases inside the chimney duct assembly in accordance with the temperature of the flue gases. This embodiment is particularly advantageous as the energy efficiency and the cooking performance of the gas oven can be further optimized.

Additional features and additional advantageous effects of the oven according to the present invention will become more apparent with the detailed description of the embodiments with reference to the accompanying drawings in which:

Figure 1 - is a schematic partial perspective view of a gas oven which has two chimney duct assemblies according to an embodiment of the present invention;

Figure 2 - is a schematic partially exploded perspective view of the gas oven of Fig 1;

Figure 3 - is a schematic partial perspective view of the gas oven of Fig 1, wherein the first chimney duct has been detachably attached to the top wall of the chamber;

Figure 4 - is a schematic partial perspective view of a gas oven which has two chimney duct assemblies according to another embodiment of the present invention;

Figure 5 - is a schematic front view of the gas oven of Fig. 4;

Figure 6 - is a schematic sectional view of the gas oven of Fig. 5, taken along the line A-A;

Figure 7 - is a schematic partially exploded perspective view of the gas oven of Fig 4.

The reference signs appearing on the drawings relate to the following technical features.

Gas oven
Chamber
Aperture
Top wall
Chimney duct assembly
1^st chimney duct

6a. Outlet
7. 1^st attachment means

8. 2^nd chimney duct

9. 2^nd attachment means

10. 1^st main sheet metal

11. 1^st cover sheet metal

12. 1^st fixing means

13. 2^nd main sheet metal

14. 2^nd cover sheet metal

15. 2^nd fixing means

16. Baffle plate

17. Slot

18. Fastening means

The gas oven (1) comprises a chamber (2) for cooking food, a gas burner (not shown) for heating the chamber (2), one or more apertures (3) which are each formed into the top wall (4) of the chamber (2), one or more chimney duct assemblies (5) each for discharging the flue gases through the aperture (3) to the outside (Fig. 1 and Fig 2)

In the gas oven (1) of the present invention, the chimney duct assembly (5) comprises a first chimney duct (6) for detachable attachment onto the top wall (4) around the respective aperture (3), a first attachment means (7) for detachably attaching the first chimney duct (6) to the top wall (4), a second chimney duct (8) for detachable attachment to the outlet (6a) of the first chimney duct (6) and a second attachment means (9) for detachably attaching the second chimney duct (8) to the first chimney duct (6) (Fig. 2 and Fig. 3).

In an embodiment, the first chimney duct (6) comprises: a first main sheet metal (10), a first cover sheet metal (11) which is adapted to be releasably fixed onto the first main sheet metal (10) and a first fixing means (12) for releasably fixing the first cover sheet metal (11) onto the first main sheet metal (10) so as to form the first chimney duct (6) (Fig. 2).

In another embodiment, the second chimney duct (8) comprises a second main sheet metal (13), a second cover sheet metal (14) which is adapted to be releasably fixed onto the second main sheet metal (13) and a second fixing means (15) for releasably fixing the second cover sheet metal (14) onto the second main sheet metal (13) so as to form the second chimney duct (8) (Fig. 7).

In another embodiment, the first chimney duct (6) extends solely upwards and the second chimney duct (8) extends first rearwards and then upwards (Fig. 6).

In another embodiment, the second chimney duct (8) comprises a baffle plate (16) for reducing the flow rate of the flue gases (Fig. 4 to 6).

In another embodiment, the second chimney duct (8) comprises a slot (17) on its ceiling for inserting the baffle plate (16) into the flow passage of the flue gases and a fastening means (18) for fastening the baffle plate (16) to the second chimney duct (8) (Fig. 7).

A major advantageous effect of the present invention is that the design and the production of the chimney duct assembly (5) becomes easier and more cost effective through the first chimney duct (6) and the second chimney duct (8) which are serially and releasably connected to the chamber (2) (Fig. 1 and Fig. 4). Thus, the required capacity of the chimney duct assembly (5) can be achieved by modifying at least one of the first chimney duct (6) and the second chimney duct (8) (Fig. 2 and Fig. 7). Thereby, the costs of forming the dies (not shown) for the chimney duct assembly (5) can be reduced. Thereby, also the waste production can be reduced, and thus the production becomes more environment-friendly. Furthermore, the stock management can be improved. Other advantageous effects of the present invention can be taken from the above-described embodiments.

Claims

A gas oven (1) comprising a chamber (2) for cooking food; a gas burner for heating the chamber (2), one or more apertures (3) which are each formed into the top wall (4) of the chamber (2), one or more chimney duct assemblies (5) each for discharging the flue gases through the aperture (3) to the outside, characterized in that the chimney duct assembly (5) comprises a first chimney duct (6) for detachable attachment onto the top wall (4) around the respective aperture (3), a first attachment means (7) for detachably attaching the first chimney duct (6) to the top wall (4), a second chimney duct (8) for detachable attachment to the outlet (6a) of the first chimney duct (6) and a second attachment means (9) for detachably attaching the second chimney duct (8) to the first chimney duct (6).
The gas oven (1) according to claim 1, characterized in that the first chimney duct (6) comprises a first main sheet metal (10), a first cover sheet metal (11) which is adapted to be releasably fixed onto the first main sheet metal (10) and a first fixing means (12) for releasably fixing the first cover sheet metal (11) onto the first main sheet metal (10) so as to form the first chimney duct (6).
The gas oven (1) according to claim 1, characterized in that the second chimney duct (8) comprises a second main sheet metal (13), a second cover sheet metal (14) which is adapted to be releasably fixed onto the second main sheet metal (13) and a second fixing means (15) for releasably fixing the second cover sheet metal (14) onto the second main sheet metal (13) so as to form the second chimney duct (8).
The gas oven (1) according to claim 1, characterized in that the first chimney duct (6) extends solely upwards and the second chimney duct (8) extends first rearwards and then upwards.
The gas oven (1) according to any one of claims 1 to 4, characterized in that the second chimney duct (8) comprises a baffle plate (16) for reducing the flow rate of the flue gases.
The gas oven (1) according to claim 5, characterized in that a slot (17) on the ceiling of the second chimney duct (8) for inserting the baffle plate (16) into the flow passage of the flue gases; and a fastening means (18) for fastening the baffle plate (16) to the second chimney duct (8).