EP3184909A2 - Baking oven with ventilation - Google Patents

Abstract

A cooking appliance, in particular an oven or a steamer, comprises a cooking chamber (2) for receiving a food item. The cooking chamber (2) is surrounded by walls (6), wherein a wall (6) is a functional wall (7). The functional wall (7) has a first passage channel (11) and a second passage channel (13). Both passages (11, 13) connect the cooking space (2) to a space outside the cooking space (2). The cooking appliance further has a flow channel (5) outside the cooking chamber (2). In the first passage (11) a supply air duct (12) is arranged, which leads from the flow channel (5) in the cooking chamber (2). Air is supplied from the flow channel (5) into the cooking chamber (2) via the supply air duct (12). In the second passage (13) an exhaust duct (14) is arranged, which extends from the cooking chamber (2) in the flow channel (5) and thereby discharges air from the cooking chamber (2).

Description

Field of the invention

The invention relates to a cooking appliance, in particular an oven or a steamer, according to claim 1.

background

It is known in cooking appliances outside the cooking chamber to arrange an air duct through which air is conveyed with a fan to cool the cooking chamber from the outside. Further, a passage between the air duct and the cooking chamber may be provided, e.g. to suck air out of the oven.

Presentation of the invention

Object of the present invention is to improve the cooking appliance of the type mentioned.

This object is achieved by the cooking appliance according to claim 1. Accordingly, the cooking appliance comprises a cooking chamber for receiving a food. The cooking chamber is bounded by walls, wherein one of the walls is a functional wall having a first passage and a second passage from the cooking chamber to outside the cooking chamber. The cooking appliance further has a flow channel, which is arranged outside the cooking chamber. In the first passage, a supply air duct is arranged, which is suitable for supplying air from the flow channel into the cooking chamber. In the second passage, an exhaust duct is provided, which is suitable for the discharge of air from the cooking chamber in the flow channel.

In this way, both a channel for the supply air and a channel for the exhaust air can be arranged on a single wall of the cooking chamber, whereby the execution of the flow channel and the production of the cooking appliance are easier to accomplish. The first and the second passageway connected to the cooking chamber thus both open at least partially into a single space, the flow channel, which is arranged outside the cooking chamber.

In a preferred embodiment, at least one electrical connection for connecting at least one component in the cooking chamber and a component outside the cooking chamber is arranged in the first and / or in the second passage. Thanks to the implementation of an electrical connection and an air duct through the same passage channel fewer openings of the walls of the cooking chamber are required and the cooking chamber is thus more reliable isolated and easier to produce.

Advantageously, in the first or in the second passage, a connection between a controller and a connection socket in the cooking chamber for connecting a Gargutsensors and / or a connection between an energy source and a Garraumbeleuchtung arranged. Also, in the first or in the second passage a connection between an energy source and a heating element in the cooking chamber and / or a connection between the controller and a cooking chamber sensor may be arranged.

An arranged in the cooking chamber end of the first and / or the second passage channel may be configured as a connection device. In this case, a connection socket for a food sensor and / or an electrical connection for heating elements arranged in the cooking chamber are arranged on the connection device. Advantageously, the connection socket for the food sensor is arranged laterally and / or in the front half, in particular in the front third, of the connection device.

The connection device is designed, for example, as an annular surface which is arranged at the end of the first and / or the second passage channel. By the "front half" is meant the half which faces forward to the front, i. directed to the cooking chamber door.

Preferably, the connection socket for the food sensor or for another component to be connected is arranged on a vertical wall of the connection device. Also conceivable is the arrangement on a horizontal wall.

The connection socket for the food sensor is advantageously arranged on the connection device close to the front side of the cooking chamber, so that the connection socket for a user for inserting the food sensor is easily accessible.

Advantageously, a fan is arranged in the flow channel, which is suitable for conveying air in the flow channel. The exhaust duct and the supply air channel open downstream of the fan in the flow channel. The term "downstream" refers to the flow direction of the air in the flow channel in normal operation. Thus, the air flows from the fan to the exhaust duct and in particular from the exhaust duct to the supply air duct.

This arrangement has the consequence that the air flowing from the cooking chamber through the exhaust duct into the flow channel air, which was contaminated in the oven, for example, by grease vapors, does not flow through the fan and contaminated.

The arranged in the flow channel fan can be configured as a radial fan and arranged with an axis perpendicular to the functional wall.

Further, the fan may be arranged such that it sucks in air from a component space in which heat-emitting electrical components, in particular electronic components with active components, of the cooking appliance are arranged. This allows the components in the component room to be cooled.

In a further embodiment, the flow channel opens into an outlet opening on the front side of the cooking appliance, wherein the fan is arranged closer to the front side than the second passage channel.

The front side is understood to mean that side of the cooking space at which the door is arranged for closing the cooking space. "Open at the front in an outlet port" means that the flow channel has at the front end, through which air leaves the flow channel, without entering the cooking chamber, in particular wherein the air is discharged directly to the environment.

This arrangement makes it possible to arrange the second passage with the exhaust air duct as far away from the front side, so that the exhaust air duct and the supply air duct are sufficiently spaced from each other, so that the air newly introduced through the supply air duct into the cooking chamber does not leave the cooking chamber directly through the exhaust duct again.

Advantageously, an exhaust air duct section extends from a first orifice in the second passage to a second orifice in the flow duct. at This embodiment opens the second mouth of the exhaust duct section downstream of the fan in the flow channel. In particular, the exhaust air duct section for generating a suction effect is remote from an air flow generated by the fan.

Advantageously, the flow channel, the fan, the supply air duct and the exhaust duct are arranged such that by operating the fan, a negative pressure in the cooking chamber relative to the environment can be generated.

In this case, the flow channel may be narrowed in the region of the exhaust air duct in such a way that the air pressure there is so low that at least partially there is a negative pressure in the cooking chamber.

By narrowing the channel, the flow rate of the air increases locally and the air pressure, i. the static pressure, locally. The channel is narrowed so that the air pressure is so deep that even in the cooking chamber partially still a negative pressure compared to the environment is present.

By generating a negative pressure in the cooking chamber, the air is discharged from the cooking chamber mainly and controlled by the exhaust duct, and the air does not escape or only slightly otherwise, for example at leaks, from the oven.

The exhaust air duct preferably has a motor-controlled throttle valve. With the throttle, the exhaust duct can be opened, partially opened or closed. This device thus allows a targeted adjustment of the pressure in the cooking chamber.

In a further preferred embodiment, a mounting plate is arranged on the opposite side of the cooking chamber of the functional wall. On the mounting plate of the flow channel is arranged and in particular can be arranged on the mounting plate and a power electronics and / or a door sensor and / or a door lock and / or a water tank and / or a fan.

The arrangement of several components and the flow channel on the mounting plate leads to a modular design of the cooking appliance and simplifies the assembly of the components. In addition, this arrangement allows a simple supply of cooling air, which was used to cool the components on the mounting plate, in the flow channel.

In a preferred embodiment, the functional wall is at the top of the cooking chamber, i. arranged on the ceiling of the cooking chamber, so that the mouths of the passage channels are arranged in the ceiling of the cooking chamber.

The mounting plate can be placed on the cooking compartment collar, i. on the door-side collar of the cooking chamber, and to be supported on a connecting piece surrounding the first or the second passage channel. Advantageously, the first and / or the second passage channel to a thread with a mother as a counterpart, such that the mother presses the mounting plate on the nozzle against the functional wall.

Under a nozzle is a cylindrical or prismatic body with a continuous vertical opening to understand.

Through this solution, the mounting plate is stably supported on a few points and fixed against the cooking chamber. The insulation of the cooking chamber wall is not or only slightly burdened by the weight of the mounting plate and arranged on the mounting plate components. The nozzle surrounds the passage, so that the isolation must be interrupted only in the area of the passage channels.

Advantageously, the cooking appliance has a supply air duct section, which projects into the flow duct with an angle of flow to the flow direction of the air. The angle of attack can be chosen differently in a steamer and in an oven to adjust the pressure within the cooking chamber.

Thus, the mounting plate can be used with the arranged on the mounting plate components both the steamer and the oven, with only minor adjustments, such as adjusting the angle of attack are necessary.

This leads to the advantage that identical components can be used with different devices.

Accordingly, the invention also relates to a set of at least two cooking appliances, wherein a first of the cooking appliances is an oven and a second of the cooking appliances is a steamer.

Brief description of the drawings

• Fig. 1 eine Seitenansicht des Gargeräts,
• Fig. 2 eine schematisch dargestellte Anordnung des Strömungskanals und weiterer Komponenten auf dem Montageblech mit Ansicht von oben ohne Gehäusedecke und
• Fig. 3 und 4 einen Durchlasskanal zwischen Garraum und Strömungskanal mit einem Stutzen.

Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Showing:

• Fig. 1 a side view of the cooking appliance,
• Fig. 2 a schematically illustrated arrangement of the flow channel and other components on the mounting plate with top view without housing cover and
• 3 and 4 a passage between cooking chamber and flow channel with a nozzle.

Ways to carry out the invention

Fig. 1 and Fig. 2 To the front of the cooking chamber 2 can be closed by a door 3, which is pivotable, for example in a conventional manner about a pivot axis in its lower edge region and can be opened.

The cooking chamber 2 is bounded by walls 6, which have an insulating layer 8 for thermal insulation. The upper wall 6 is used as a functional wall. 7 designated. Above the functional wall 7, a mounting plate 9 is arranged. In the intermediate space between the housing cover 101 and the mounting plate 9 are a component space 4 and a flow channel. 5

In the flow channel 5, which is separated by a wall 5a from the component space 4, located on the mounting plate 9, a radial fan 10, which conveys air from the component space 4 in the flow channel 5. The air passes from the environment via an air channel 17, which extends below and laterally along the cooking chamber 2, in the component space 4th

In the functional wall 7, a first passage 11 and a second passage 13 are provided, which connect the cooking chamber 2 with the space between the mounting plate 9 and the housing cover 101. As in Fig. 3 are shown in the first passage 11, a supply air duct 12, through which air flows mainly from the flow channel 5 in the cooking chamber 2, and electrical connections 21 and 22. In the second passage channel 13, as in Fig. 4 shown, also an exhaust duct 14, arranged for the discharge of air from the cooking chamber 2 in the flow channel 5, and further electrical connections 23 and 24.

The electrical connections 21-24 connect in the embodiment shown in the cooking chamber 2 arranged components 41-44 arranged in the component space 4 components 31,33 (shown in FIG Fig. 1 ). In this way, a food sensor 41 with a controller 31, a light source 42 with a power source (not shown), a heating means 43 with power electronics 33 and a cooking chamber sensor 44 are connected to the controller 31.

The Fig. 2 shows the cooking appliance from above, with the housing cover 101 is hidden. In the component space 4, for example, a door sensor 34, a door lock 35 and a water tank 36 are arranged on the mounting plate 9 in addition to the components already mentioned.

Further shows Fig. 2 the design of the flow channel 5. The air is sucked in by the radial fan 10 from the component space 4 in the flow channel 5. An exhaust air duct section 141 extends from a first orifice in the second passage 13 to a second orifice in the flow duct 5. The second orifice opens into the flow duct 5 downstream of the radial fan 10. By narrowing the flow channel 5 at the confluence of the exhaust air duct section 141 in the flow channel 5, the flow velocity of the air is increased and the static pressure is lowered. In this way, a low pressure in comparison to the environment and the cooking chamber 2 is generated in the flow channel 5, so that the air is conveyed from the cooking chamber 2 through the exhaust duct 14 into the flow channel 5. The pressure in the exhaust duct section 141 and at its confluence with the flow channel 5 is set so low in the oven that in the cooking chamber 2 relative to the environment a negative pressure prevails, so that the air in the cooking chamber 2 is almost completely discharged through the exhaust duct 14 and not otherwise escapes from the cooking chamber 2. The exhaust duct 14 may have a motor-controlled throttle valve 142, with which the flow cross-section of the exhaust duct 14 can be adjusted and thus the pressure in the cooking chamber can be controlled specifically.

Downstream of the fan 10 and from the junction of the exhaust duct section 141 in the flow channel 5, the flow channel 5 is configured with a cross section which is larger compared to the location of the confluence of the exhaust duct section 141 in the flow channel 5, so that the flow rate is reduced and the Pressure is increased. In this part of the flow channel 5, a supply air duct 12 is arranged, through which air from the flow channel 5 passes into the cooking chamber 2. The supply air duct 12 has a preferably transverse to the vertical supply air passage portion 121 which projects at an angle in the flow channel 5. By selecting the angle of the supply air duct section 121 in relation to the main flow direction in the flow channel 5, the air volume flow entering the cooking chamber 2 can be controlled.

In the area of the supply air duct 12, a temperature sensor (not shown) may be arranged. This allows a pressure increase in the cooking chamber 2, e.g. by emerging from the food to be steam, thereby detecting that when exceeding a pressure threshold, the flow direction in the supply air channel 12 reverses and hot air flows back from the cooking chamber 2 through the supply air duct 12. This allows an improved control of the cooking process.

A large part of the air sucked into the flow channel 5 by the radial fan 10 leaves the cooking appliance via the front side 15 towards the environment. A small part of the air passes through the supply air duct 12 into the cooking chamber 2 and leaves the cooking chamber 2 through the exhaust air duct 14.

Fig. 3 shows the first passageway 11 with the supply air duct 12 and the electrical connections 21 and 22nd Fig. 4 shows the second passage 13 with the exhaust duct 14 and the electrical connections 23 and 24th

The 3 and 4 show, by way of example and in detail, how the air ducts 12 and 14 and the electrical connections 21-24 are arranged in the passageways 11 and 13. The air ducts 12 and 14 are arranged in the illustrated embodiment centered in the passageways 11 and 13. Outside the air ducts 12 and 14 are the electrical connections 21-24. At those ends of the passage channels 11 and 13, which open into the cooking chamber 2, a connecting device 17 is provided. The electrical connections 21-24 extend through the connecting device 17 or are designed as, for example, the food sensor 41 as a connection socket 25, so that the cooking space 2 arranged components 41-44 can be connected to the connecting device 17 via a plug with the connecting device 17.

Since the food sensor 41 must be regularly inserted and unplugged by the user, an arrangement of the connection socket 25 for the food sensor 41 close to the front side 15 is advantageous so that the connection socket 25 is easily accessible.

The supply air duct 12, the exhaust duct 14 or both channels may be surrounded by a nozzle 18, on which the mounting plate 9 is supported. To fix the mounting plate 9, for example, on the supply air channel 12 surrounding pipe 18, the supply air channel 12 has a thread 19, with which a nut 20 counteracts. The nut 20 is turned on from above and presses the mounting plate 9 for fixing against the nozzle 18th

While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.

Claims (14)

Cooking appliance, in particular oven or steamer, characterized by
a cooking chamber (2) for receiving a cooking product, which is bounded by walls (6), wherein one of the walls (6) is a functional wall (7) with a first passage (11) and with a second passage (13) from the cooking chamber (13) 2) to outside the cooking chamber (2) and
a flow channel (5) outside the cooking chamber (2),
wherein through the first passage (11), a supply air duct (12) from the flow channel (5) into the cooking chamber (2) for supplying air into the cooking chamber (2), and through the second passage (13) an exhaust air duct (14) from the cooking chamber (2) in the flow channel (5), for the removal of air from the cooking chamber (2) extends. Cooking appliance according to claim 1, wherein in the first (11) and / or in the second (13) passage channel at least one electrical connection (21,22,23,24) for connecting a component (41,42,43,44) in the cooking chamber (2 ) and a component (31, 33) outside the cooking chamber (2). Cooking appliance according to claim 2, wherein in the first (11) or in the second (13) passage channel - A connection (21) between a controller (31) and a connection socket (25) in the cooking chamber (2) for connecting a Gargutsensors (41) and / or - A connection (22) between a power source and a cooking chamber lighting (42) and / or - A connection (23) between a power electronics (33) and a heating element (43) in the cooking chamber (2) and / or - A connection (24) between the controller (31) and a cooking chamber sensor (44) are arranged. Cooking appliance according to claim 3, wherein an in the cooking chamber (2) arranged end of the first (11) and / or the second (13) passage channel, a connection device (17), wherein - A connection socket (25) for a food sensor (41) and / or an electrical connection for heating elements (43) arranged in the cooking chamber (2), are arranged on the connecting device (17) and
in particular wherein the connection socket (25) for the food sensor (41) is arranged laterally and / or in the front half, in particular in the front third, of the first passage channel (11). Cooking appliance according to one of the preceding claims, wherein a fan (10) is arranged in the flow channel (5) for conveying air in the flow channel (5), and wherein the exhaust air channel (14) and the supply air channel (12) downstream of the fan (10). open into the flow channel (5). Cooking appliance according to claim 5, wherein the fan (10) is arranged such that the fan (10) sucks air from a component space (4), in which heat-emitting, electrical components (31,33) of the cooking appliance are arranged. Cooking appliance according to one of the preceding claims, wherein the cooking appliance has a front side (15) with a door (3) for closing the cooking chamber (2), wherein the flow channel (5) opens at the front side (15) in an outlet opening and wherein the fan (10) is arranged closer to the front side (15) than the second passage channel (13). A cooking apparatus according to claims 5 and 7, wherein an exhaust duct portion (141) extends from a first orifice at the second passage (13) to a second orifice in the flow duct (5), the second orifice being located downstream of the fan (10), and in particular facing away from an air flow generated by the fan (10) for generating a suction effect. Cooking appliance according to one of the preceding claims, wherein the flow channel (5), the fan (10), the supply air duct (12) and the exhaust air duct (14) are arranged such that by operating the fan (10) a negative pressure in the cooking chamber (2). can be generated relative to the environment. Cooking appliance according to one of the preceding claims, wherein the flow channel (5) in the region of an opening of the exhaust duct (14) in the flow channel (5) is designed so narrow that the air pressure is so low that in the cooking chamber (2) at least partially a negative pressure prevails. Cooking appliance according to one of the preceding claims, wherein the exhaust air duct (14) has a motor-controlled throttle valve (142). Cooking appliance according to one of the preceding claims, wherein on the cooking chamber (2) opposite side of the functional wall (7) a mounting plate (9) is arranged,
wherein on the mounting plate (9) of the flow channel (5) is arranged, and
in particular wherein on the mounting plate (9) a controller (31) and / or power electronics (33) and / or a door sensor (34) and / or a door lock (35) and / or a water tank (36) and / or a fan (10) are arranged. Cooking appliance according to one of the preceding claims, wherein - The cooking appliance has a door (3), wherein the cooking chamber opens on the door side in a cooking compartment collar, - The mounting plate (9) on the cooking chamber collar (16) and on a first (11) or the second (13) passage channel surrounding the nozzle (18) is supported, in particular wherein the first (11) and / or the second (13) passage channel has a thread (19) with a nut (20) as a counterpart, such that the nut (20) the mounting plate (9) on the neck (18) pressed. Set of at least two cooking appliances according to one of the preceding claims, wherein a first of the cooking appliances is an oven and a second of the cooking appliances is a steamer, wherein a Zuluftkanalabschnitt (141) projects with a flow angle to the flow direction of the fan-assisted air in the flow channel (5) , wherein the angle of attack is different in the steamer and in the oven to produce at the same flow rate in the cooking chamber (2) of the steamer a higher pressure than in the cooking chamber (2) of the oven.

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