EP3502570B1

EP3502570B1 - A flue chamber

Info

Publication number: EP3502570B1
Application number: EP18195164.1A
Authority: EP
Inventors: Sabri Omur DURMUS; Fedai Mutlu; Emir Gurcan DERBEDEK; Baris OZBEK
Original assignee: Vestel Beyaz Esya Sanayi ve Ticaret AS
Current assignee: Vestel Beyaz Esya Sanayi ve Ticaret AS
Priority date: 2017-12-22
Filing date: 2018-09-18
Publication date: 2021-03-31
Anticipated expiration: 2038-09-18
Also published as: TR201721312A2; EP3502570A1

Description

Technical Field

Present invention relates to a flue chamber suitable for use in oven-type cooking devices and providing to discharge, in a reliable manner, air which is formed within the cooking compartment of the cooking device.

Prior Art

Oven-type cooking devices comprise at least one cooking compartment in which cooking process takes place and which, preferably, is heated by means of a heating element. When a cooking or heating process is performed within said cooking compartment, various gases may be formed depending on structure of the product being heated/cooked and characteristics of the heating element being used. For example, during cooking of a liquid containing food, steam is formed within the cooking compartment as a result of evaporation of the liquid. In addition to this, for example if a gas heater is used, gases such as carbon dioxide are formed due to burning of the gas. Such gases formed within the cooking compartment may negatively affect the cooking/heating process. For that reason, said gases should be removed from the cooking compartment.
In the known art, flue structures are used to send out the gases formed within the cooking compartment. Said flue structures comprise a flue which communicates with the cooking compartment on one side, and communicates with the outside on the other side through a body of the cooking device. Flue structures used in the cooking devices enables to practically discharge gases formed within the cooking compartment. However, since temperature of the gases formed within the cooking compartment is generally high (250 - 350°C), during release of these gases from the hearth plate flue outlet discharges on the hearth plate by means of a flue directly through the body of the cooking device, colour changes are caused especially at the hearth plate flue outlet region made of inox raw material.
In the patent document no. DE3931482A1 a baking and roasting oven combining microwave and electric cooking is disclosed. The oven uses resistance heating elements and a HF generator used respectively for conventional and microwave cooking. The oven comprises a vent opening incorporated in the oven wall coupled to a catalytic afterburner and incorporating an extractor fan operated only when the oven is operated in microwave cooking mode. A second vent opening is provided on the oven wall. The second vent opening is normally closed by a closure flap and is opened via an electric switch device upon switching of the extractor fan and the circulation fan, associated with the resistance heating elements at the rear of the oven space. Therefore, when large quantity of food is cooking with the oven both vent openings are used at the same time in order to ensure prevention of humidity within cooking space. If it not needed second vent opening is closed by the closure flap, and if it is needed the flap moved by the switch and the opening is opened. Ventilation through the second vent opening is ensured by a suction cup which has two openings one of which corresponds to the second vent opening and the other one ensures moisture discharge from the suction cap. Said flap is provided within the suction cap and an insulation plate is provided on the flap.
In the patent document no WO2013/098251A1 an oven comprising an exhaust duct is disclosed. The exhaust duct is directly in connection with the oven cavity and ensures the transfer of the gases inside the oven cavity to the outside environment and therefore performs the function of a flue of an oven. The exhaust duct comprises a front wall, a rear wall and an outlet port between the rear wall and the front wall. The oven of this document further comprises a barrier situated at the outlet port, extends from outlet port towards into the exhaust duct, attached to the outlet port from one side and to the rear wall from the other side. The barrier divides the section of the exhaust duct prior to the outlet port into two. The hot air coming from the oven cavity is discharged through the outlet port by passing between barrier and front wall. The divided section of the duct remaining between the barrier and the rear wall is used as a cooling section and air circulation from the outside environment occurs towards this cooling section. Thanks to this structure, the objects provided around the oven (such as a wall of the room in which the oven is present) is prevented from being heated due to the hot air exhausting from the oven cavity.
In the patent document no. US2264657A a gas cooking range which is more pleasing in appearance and which has an improved manner of discharging the combustion gases is disclosed. For that reason the range comprises a splash back in a vertical line above the inner wall of the top burner chamber. An elongated flue box is disposed behind the cooking top burner chamber and receives in its one end the combustion gases from a cooking compartment and in its other end the combustion gases from another cooking compartment. The range further comprises a supplemental vertically extending flue box, provided between the splash back and the kitchen wall and has communication at its lower end with the aforementioned horizontally disposed flue box. The splash back is provided with louvre outlets with the result that the combustion gases are discharged in front of the rear end of the range and in front of the splash back in a direction away from the kitchen wall. Therefore the kitchen wall is not either stained or discolored. The rear wall of the vertical flue box is insulated so as to prevent dangerous overheating of the kitchen wall.
In the patent document no. US2016/178218A1 a kitchen range provided with a cooktop, a guard unit with a front wall facing the cooktop and an exhaust pipe is disclosed. On the front wall, there is a gas outlet being directly connected with the exhaust pipe. The exhaust gases of the gas heating source of the range are discharged by means of the exhaust pipe. The exhaust pipe is provided in the guard unit and the guard unit further comprises a cooling unit in order to protect a human from being burned when touched to the side, top and back outer surfaces of the guard unit. A bottom region of the guard unit shows inlet ports for ambient air passage at the wall. In the invention of this document, the exhaust gas received from the range is discharged by means of the pipe. Thanks to ambient air circulation around the pipe with in the guard unit, overheating of the guard unit due to hat gas passage within the exhaust pipe is prevented.
Documents US 4 021 642 A and US 2 158 881 A disclose further relevant ranges of the prior art.

Brief Description of Invention

The present invention provides a flue chamber according to independent claim 1.
In the flue chamber according to the present invention, hot air coming from the cooking compartment of the cooking device via the flue passes through a discharge line, which is formed by the intermediate wall in the body, so as to be sent to the outside through the discharge hole. In here, thanks to the insulation element located between said intermediate wall and the body or between the intermediate wall and the opening, temperature of the hot air, passing through the discharge line, on the intermediate wall is prevented from being transferred to the flue outlet section of the hearth plate by heat transfer. Therefore, deteriorations are prevented in a practical and reliable manner, which may be formed due to hot gas particularly at the hearth plate surface made of inox raw material.

Object of Invention

An object of the present invention is to develop a flue chamber suitable for use in oven-type cooking devices and providing to discharge, in a reliable manner, gases which are formed within the cooking compartment of the cooking device.
Another object of the present invention is to develop a flue chamber which prevents colour change, associated with the discharged gases, at the hearth plate surface of the cooking device made of inox raw material.
Yet another object of the present invention is to develop a durable and reliable flue chamber.

Brief Description of Drawings

Exemplary embodiments of the flue chamber according to the present invention are shown in accompanying drawings, in which:

Figure 1; is a perspective view of use of the developed flue chamber in a cooking device.
Figure 2; is a side-sectional view of the use of developed flue chamber in a cooking device.
Figure 3; is a perspective view of the use of developed flue chamber with a hearth plate in a cooking device.
Figure 4; is a perspective view of the developed flue chamber.
Figure 5; is an exploded view of the developed flue chamber.

All the parts illustrated in figures are individually assigned a reference numeral and the corresponding terms of these numbers are listed below:

Cooking device	(P)
Cooking compartment	(P1)
Flue	(P2)
Hearth plate	(P3)
Discharge hole of the hearth plate	(P4)
Flue chamber	(S)
Body	(1)
Opening	(1a)
Discharge hole	(1b)
Upper wall	(1c)
Connection section	(1d)
Intermediate wall	(2)
Connection lug	(2a)
Insulation element	(3)
Connection element	(4)

Description of Invention

For the oven-type cooking devices, gases which are formed within the cooking compartment during the cooking process should be discharged. Discharging said gases through a flue directly communicating with the body of the cooking device may cause particularly hearth plate of the cooking device made of inox raw material to get damaged. Therefore, with the present invention, there is developed a flue chamber for use in oven-type cooking devices and providing to discharge, in a reliable manner, gases which are formed within the cooking compartment of the cooking device, and being mounted to the flue outlet.
The flue chamber (S) according to the present invention, exemplary views of which are provided in figures 1-4, is suitable for use in a cooking device (P) which comprises at least one cooking compartment (P1) and at least one flue (P2) communicating with the cooking compartment (P1) on at least one side, the flue chamber comprising at least one body (1) in the form of a hollow box which has at least one opening (1a) on at least one side, and at least one discharge hole (1b) on at least another side; at least one intermediate wall (2) which is positioned in said body (1), partially closes said opening (1a), and forms a discharge line between said discharge hole (1b) and the part of the opening (1a) that is not closed by the intermediate wall; at least one insulation element (3) located between the intermediate wall (2) and the opening (1a), and having heat insulating properties; and at least one connection section (1d) located in said body (1) and connecting the body (1) to the cooking device (P) through the opening.
According to the present invention, the intermediate wall (2) positioned within the body (1) partially closes the opening (1a) which is located in the body (1). Here, in the body (1), a discharge line is formed between the discharge hole (1b) and the part of the opening (1a) that is not closed by the intermediate wall (2). At least another side of said flue (P2) which is not communicating with the cooking compartment (P1) is connected to the section of the opening (1a) that is not closed by the intermediate wall (2). In here, gases formed within the cooking compartment (P1) pass, respectively, through the flue (P2), the opening (1a), the discharge line formed within the body (1), and finally the discharge hole (1b) to be sent out. While said gases are discharged in this manner, the insulation element (3) (e.g. a glass wool) located between said intermediate wall (2) and the body (1) or between the intermediate wall (2) and the opening (1a) prevents the heat formed within the discharge line from being transferred to the cooking device (P). In other words, thanks to said insulation element (3), heat exchange between the section of the opening (1a) which is closed by the intermediate wall (2) and the cooking device (P) is blocked. Thus, hearth plate (P3) of the cooking device (P) is prevented to get damaged due to hot gases discharged from the cooking compartment (P1).
According to the present invention, said intermediate wall (2) is in the form of a plate which is in connection with an upper wall (1c) of said body (1) on at least one side, and is inclined (in other words, having an acute angle with the upper wall (1c)) so as to approach to said opening (1a) as it moves away from the upper wall (1c). In this embodiment, said insulation element (3) is positioned at the face of the intermediate wall (2), which is in the form of a plate, facing to the opening (1a). In here, when the body (1) is connected to the cooking device (P), said insulation element (3) is between the intermediate wall (2) and the cooking device (P). By this way, a better heat insulation is provided between the cooking device (P) and the discharge line.
According to the present invention, said discharge hole (1b) is positioned at an upper wall (1c) of the body (1). Thus, it is provided to discharge gases, which are coming from the discharge hole, through the discharge hole (1b) in a simpler way. In this embodiment, said discharge hole (1b) is, preferably, aligned coaxially with the discharge hole of the hearth plate (P4).
Yet in another preferred embodiment of the present invention, said intermediate wall (2) is integral with the body (1). In an alternative embodiment, the intermediate wall (2) is attachable to and detachable from the body (1). In this embodiment, the flue chamber (S) comprises at least one connection lug (2a) located at the intermediate wall (2), and at least one connection element (4), preferably in the form of a screw, to connect said connection lug (2a) to the body (1). Therefore, the flue chamber (S) can be used in a simple and practical manner.
In another preferred embodiment of the present invention, said flue chamber (S) comprises at least one protective layer (not shown in the figures) located on the body (1) and having high thermal endurance. Said protective layer is preferably in the form of a dye having high temperature endurance. By this way, the body (1) is prevented from being damaged from the hot gas passing through the body (1).
In the flue chamber (S) according to the present invention, hot air coming from the cooking compartment (P1) of the cooking device (P) via the flue (P2) passes through a discharge line, which is formed by the intermediate wall (2) in the body (1), so as to be sent to the outside through the discharge hole (1b). In here, thanks to the insulation element (3) located between the intermediate wall (2) and the opening (1a), hot air passing through the discharge line is prevented from being transferred to the hearth plate (P3). Therefore, deteriorations are prevented in a practical and reliable manner, which are formed due to the hot gas at the hearth plate (P3) made of inox raw material.

Claims

A flue chamber (S) suitable for use with a cooking device (P) which comprises at least one cooking compartment (P1) and at least one flue (P2) communicating with the cooking compartment (P1) on at least one side, said flue chamber comprising
- at least one body (1) in the form of a hollow box having at least one opening (1a) on at least one side, and at least one discharge hole (1b) on at least another side and comprising at least one upper wall (1c) on which the discharge hole (1b) is provided;
characterized in that said flue chamber further comprises
- at least one intermediate wall (2) which is positioned in said body (1), partially closes said opening (1a), which forms a discharge line between said discharge hole (1b) and the part of the opening (1a) that is not closed by the intermediate wall (2), which is in the form of a plate being in connection with the upper wall (1c) and which is inclined so as to approach to said opening (1a) as it extends away from the upper wall (1c);

- at least one insulation element (3) located between the intermediate wall (2) and the opening (1a), and having heat insulating properties; and

- at least one connection section (1d) located in said body (1) for connecting the body (1) to the cooking device (P) through the opening (1a).
A flue chamber (S) according to claim 1, characterized in that the intermediate wall (2) is integral with the body (1).
A flue chamber (S) according to claim 1, characterized in that the intermediate wall (2) is attachable to and detachable from the body (1).
A flue chamber (S) according to claim 3, characterized by comprising at least one connection lug (2a) located at the intermediate wall (2), and at least one connection element (4) to connect said connection lug (2a) to the body (1).
A flue chamber (S) according to claim 1, characterized by comprising at least one protective layer located on the body (1) and having high thermal endurance.