EP0726425B1 - Built-in cooking device - cooling - Google Patents

Description

The present invention relates to a built-in cooking appliance according to the preamble of Claim 1.

Such built-in cooking device is known from DE 23 49 388, the Cooling air blowers arranged in the housing and the housing with numerous, over the circumference of which is provided with ventilation openings. For cooling of heat-sensitive components of the built-in cooking appliance and its peripherals sucks in the cooling air fan from almost all sides through the openings then blows the heated cooling air out of the device. This results in a high cooling air expenditure, for example is a powerful cooling air blower required, and especially high heat losses, because of the almost all-round Flow around the side walls of the cooking space is extracted from this heat.

Furthermore, DE 81 30 645 U1 describes a device for cooling electrical and electronic circuitry in a switch room above one Oven known. A cooling air blower sucks in the cooling air from the outside Washing around the circuit arrangement and blowing it in a range between Oven and the display and / or the control device back to the outside.

DE 80 34 134 U1 discloses an oven in which inside the oven door a vertical, downward and upward open cooling air convection duct is provided is. Even if there is a slight gap that is open to the outside between the bottom wall of the housing and the underside of the furnace muffle or the door there is a deterioration in the cooling effect.

From DE 88 06 275 U1 it is known that in an oven in Side area are suction openings through which a cross flow fan cooling air in A built-in oven sucks this cooling air through an exhaust duct at the front below operating and display elements over essentially the entire width to blow out of the oven.

DE 28 06 158 C2 discloses a built-in double oven, the upper one Oven is designed as a microwave oven and its housing over the entire installation depth has ventilation openings. In addition, the microwave oven has its own air duct system with a blower, the cooling air on Presses magnetron past into the cooking space.

Furthermore, from DE 21 06 869 a built-in oven with one behind Switch panel arranged switch compartment for receiving electrical switching or. Control elements as well as with a fan for conveying air through the Furnace housing disclosed. The switch room with cold air intake openings and the switch room with the Air intake openings connecting air passage openings, and through the Cooling air drawn into the switch compartment is guided in such a way that it is in the air intake space the heated air flowing around the inside of the furnace housing and mixes them Mixed air bypassing the switch room from the inside of the furnace housing is dissipated.

It is common practice to place the cooling air blower in the housing and the housing with numerous ventilation openings arranged around its circumference Mistake. For cooling heat-sensitive components of the built-in cooking appliance and the periphery of the cooling air fan sucks cooling air from the openings on almost all sides and then blows the heated cooling air out of the device. This results in a high cooling effort, for example a powerful one Cooling air blower required, and especially high heat losses, because of the almost all-round flow the heat from the side walls of the cooking space is removed.

The object of the invention is to provide a built-in cooking appliance in which simple Adequate cooling can be achieved with little heat removal from the cooking space is.

According to the invention, this is the case with a built-in cooking appliance with the features of Claim 1 reached. Through the targeted concentration of cooling on the critical areas of the cooking appliance or its immediate surroundings is one more efficient cooling with less air flow possible. These critical areas or Elements are u. a. Temperature-sensitive, electrical components of the cooking device and the built-in furniture front edge in its upper area. The targeted cooling enables the use of a weaker and quieter motor. Will continue significantly less heat is extracted from the oven or cooking space. According to the invention as a cooling air guide means above the cooking chamber compared to this and the Ambient housing space arranged essentially closed cooling chamber, in of the electrical components are placed, the suction or Blow-out opening of the chamber in the front area of the side walls of the housing are formed, and in which the cooling air fan has a negative pressure for drawing in Cooling air generated. As a result, the cooling air flow into the housing is at an area over the front edge of the furniture for cooling it and inside the housing on the Cooling of the electrical components limited. Alternatively, the Air guidance means also assigned by the cooling air blower tubular cooling air ducts with appropriate intake and Blow openings are formed.

Around the suction area of the cooling chamber downwards extend, the cooling chamber has vertical, vertical intake ducts on the front of the housing. The installation of the cooling air blower in the cooling chamber enables because of the low temperature in this area and the spatial proximity to their intake opening the use of a simple blower. The depth of the chamber is advantageously about a third of the depth of the cooking appliance. On the one hand, this is sufficient for the cooling air fan as well to accommodate the electrical components and to other cheap, because the cooking space as little heat through the cooling is withdrawn. If the blower is outside the Cooling chamber is arranged, this can be correspondingly smaller be designed. According to a further development as a cooling air guide an exhaust air duct of the cooling air blower on Bottom of the chamber arranged. This will range between a layer of cooling air in the actual cooling chamber and the cooking space generates the electrical components in addition thermally decoupled from the cooking space. To be a simple one Retrofit solution for cooking devices already in operation To provide, the chamber is through a floor panel from screened the rest of the cooking space, the one separated thereby Space through the side walls and the front panel of the housing together with a cover plate to the closed cooling chamber is added.

If the suction openings in the front area of the side walls of the case will be the coolest available Air for cooling the over-temperature critical furniture front edge used. This results in better cooling results achievable in this area than with the cooling process warmed, blown air.

According to a preferred embodiment, the cooling air guide means and to cover the gap between the Built-in furniture and the side wall of the built-in oven Viewing panel arranged with ventilation openings is. This is a preferred routing of a cooling air flow guaranteed in this critical area. Advantageously the ventilation openings are at least partially between the screen and the built-in furniture or its front edge formed to cool the cooling air immediately for better cooling to pass this edge.

The arrangement of the exhaust openings on the front of the Cooking appliance or the cooling chamber favors a simple Structure and ensures that the cooling air duct on a limited space within the housing is. According to an advantageous development the exhaust openings below those on the control panel Controls arranged such that the blown out Cooling air on the controls in front of the oven door Ascending heat forms a protective air apron. The formation of a door handle ventilation duct in the door handle of the Cooking chamber door, the outlet openings when the Cooking chamber door are assigned to the door handle ventilation duct for Blow out the cooling air through the door handle, still allows targeted cooling in a simple manner the door handle. It is advantageous to use the blow-out openings essentially over the entire width of the cooking appliance to arrange. If the blown cooling air corresponds to one Ventilated door above the door handle ventilation duct inside the oven door is easy Medium additionally achieved cooling of the oven door. On Blow out the cooling air at the front of the oven door from would go down because of the hot air rising there require a more powerful fan.

Fig. 1

eine Draufsicht auf das Gargerät bei abgenommener oberer Gehäusewandung,

Fig. 2

eine Schnittdarstellung im wesentlichen entlang der Linie II-II in Fig. 1 und

Fig. 3

eine schematische Teilschnittdraufsicht in vergrößertem Maßstab auf den Bereich zwischen dem Einbaugargerät und dem Einbaumöbel.

An exemplary embodiment of the built-in cooking appliance according to the invention is described below using schematic representations. Show it:

Fig. 1

a plan view of the cooking appliance with the upper housing wall removed,

Fig. 2

a sectional view substantially along the line II-II in Fig. 1 and

Fig. 3

a schematic partial sectional plan view on an enlarged scale of the area between the built-in cooking appliance and the built-in furniture.

A built-in cooking appliance 1 with a housing 3 has a cooking space 5 with a cooking chamber insulation 7 surrounding it. Not Heating elements shown in more detail are in the cooking chamber 5 for heating it intended. This is through on its front a cooking chamber door 9 lockable. In the front area of the Cooking appliance 1 is in the housing 3 above the cooking chamber 5 Cooling chamber 11 formed. This is from a floor pan 13, a front panel 15 and side walls 17 of the housing 3 and a cover plate, not shown. The Cooling chamber 11 extends over the entire width of the device 1, the depth of the cooling chamber 11 being approximately one Third of the depth of the cooking device 1 is limited. The cooling chamber 11 is substantially opposite a surrounding housing space 19 completed. In the cooling chamber 11 are the Front plate 15 associated electrical components 21 of the Cooking appliance 1 and a cooling air blower 23 arranged. Their Blower intake opening 25 is approximately in the middle of the width of the Cooking device 1 arranged in the rear of the cooling chamber 11. The cooling air blower 23 continues to have on its blowing side an air guide plate 27, which together with the Floor plate 13 of the cooling chamber 11 in this area an exhaust air duct 29 form. For sucking in the air from outside the Housing 3 in the cooling chamber 11 are the side walls 17th provided with suction openings 31. These are about yourself approximately triangularly extending suction area 33 (dotted limited area in Fig. 2) distributed in the front Area of the cooling chamber 11 to about half the height of the cooking appliance 1 extends downwards. To get out of the deeper too located suction openings 31 to be able to suck in air, without the cooling chamber 11 over its entire width accordingly extend downward are at the outer edge areas the cooling chamber 11 in the region of the front housing edges Intake shafts 35 formed.

To blow out the cooling air is in the area of the front panel 15 assigned to the exhaust air duct 29 of the cooling chamber 11 on the Front of the cooking device 1 has a slot-shaped outlet opening 37 molded. When the oven door 9 is closed, it opens the blow-out opening 37 into a door handle 41 Door handle ventilation duct 43 with door handle blow-out openings 45.

In terms of operation, the built-in cooking appliance 1 is in a kitchen furniture 51 built-in. This has a kitchen furniture door 53, which the Cooking chamber door 9 or the front area of the side walls 17 of the housing 3 are slightly spaced apart. At the Operation of the cooling air blower 23 is through the arrangement of the Intake openings 31 through the cooling air between the built-in furniture 51 and the built-in cooking device 1 ventilation openings 55 the cooling air from the front on the built-in furniture 51 or the furniture door 53 sucked in and through the fan suction openings 25 sucked into the cooling chamber 11 to the fan suction opening 25. As a result, both the built-in furniture 51 and the cooking appliance 1 in the range of its highest temperatures by the Cooling air is cooled, and the electrical components 21 are protected from excessive heating. The warmed up Cooling air is through the exhaust air duct 29 through the blow-out opening 37 of the cooking device 1 in the door handle 41 and finally blown out of the door handle blow-out opening 45 again to the front. As a result, the door handle 41 is cooled and on the other hand, a control panel 57 is arranged in the area Controls 59 in front of the ascending on the oven door. Hot air by means of the entire width of the cooking device 1 Protected air apron protected. Part of the blown out Cooling air is deflected in the door handle ventilation duct 43 and in the oven door 9 directed to its forced cooling.

3 schematically shows the area between a side wall 17 and the built-in furniture 51 or the built-in furniture door 53 shown. A rectangular muffle flange 61 or its Muffle opening is through the cooking appliance door 9 with a door bottom 63 and a glass plate 65 closable. On the muffle flange 61 a seal 67 is attached, on which the Door 9 is supported in the closed position. The muffle flange 61 serves at the same time via a mounting bracket 69 for mounting the cooking space side walls 17. Towards the front is next to the muffle flange 61 one aligned with this Screen or pilaster 71 arranged when the Door 9 the gap between the housing side wall 17 and the built-in furniture 51 covered. About the height of the pilaster 71 ventilation openings 55 are distributed in the front area of the pilaster strips and between an angled backwards, on the furniture supporting section of the pilasters 71 and the built-in furniture 51 or the kitchen furniture door 53 formed. Through the through the Lisene 71 and between the Lisene 71 and the built-in furniture 51 Cooling air flowing through the pilaster also becomes 71 occurring heat transfer between the device 1 and the Built-in furniture 51 kept low.

Claims (13)

1. Built-in cooking appliance with a housing (3), which is installed between the walls of an item of built-in furniture in such a manner that the walls of the item of built-in furniture are disposed opposite the side walls of the housing at least in part with a small spacing, with a heatable, thermally insulated cooking chamber (5) closable at the front side by a cooking chamber door (9), with electrical components (21) in the region behind a control panel of the cooking appliance and with cooling air guide means as well as a cooling air fan (23), which conveys air by way of induction and exhaust openings for the cooling, characterised in that a cooling chamber (11), in which the constructional elements (21) are disposed, inclusive of downstream cooling air fan (23) is arranged as cooling air guide means above the cooking chamber (5) and is substantially closed relative thereto and to a surrounding housing chamber (19), and wherein the induction openings (31) of the cooling chamber are arranged in the front region of the side walls (17) of the housing (3), and in which cooling chamber the cooling air fan (23) produces an underpressure for suction of the cooling air in order to limit the cooling substantially to the front region between the side walls (17) of the housing (3) and the walls of the item of built-in furniture (51) as well as to the electrical components (21).
2. Built-in cooking appliance according to claim 1, characterised in that the cooling chamber (11) has vertical induction shafts (35) in the region of the vertical housing edges at the front side.
3. Built-in cooking appliance according to claim 1 or 2, characterised in that the cooling air fan (23) is arranged in the cooling chamber (11).
4. Built-in cooking appliance according to claim 1, 2 or 3, characterised in that the depth of the cooling chamber (11) amounts approximately to one third of the depth of the cooking appliance (1).
5. Built-in cooking appliance according to one of the preceding claims, characterised in that an outlfow channel (29) of the cooling air fan (23) is arranged at the base of the cooling chamber (11).
6. Built-in cooking appliance according to one of the preceding claims, characterised in that a trim panel (71) covering a gap between the item of built-in furniture (51) and the side walling (17) of the built-in cooking appliance (1) is provided with ventilating openings (55).
7. Built-in cooking appliance according to claim 6, characterised in that the ventilating openings (55) are formed at least in part between the trim panel (71) and the item of built-in furniture (51, 53).
8. Built-in cooking appliance according to one of the preceding claims, characterised in that the exhaust openings (37) are arranged at the front side of the cooking appliance (1).
9. Built-in cooking appliance according to claim 8 with control elements mounted at the control panel, characterised in that the exhaust openings (37) are arranged below the control elements (59) and that the cooling air which is exhausted forms an air skirt protecting the control elements (59) against the hot air rising up at the cooking chamber door (9).
10. Built-in cooking appliance according to claim 8 or 9, characterised in that a door grip ventilating channel (43) is formed in a door grip (41) of the cooking chamber door (9) and that the exhaust openings (37) of the cooking appliance (1) are associated with the door grip ventilating channel (43), when the cooking chamber door (9) is closed, for exhausting the cooling air through the door grip (41).
11. Built-in cooking appliance according to claim 8, 9 or 10, characterised in that the exhaust openings (37) are arranged substantially over the entire width of the cooking appliance (1).
12. Built-in cooking appliance according to one of claims 1 to 5, characterised in that the chamber (11) is formed by sections of the side walls (17) of the housing (3), a front plate (15) of the control panel (57), a base plate (13) and a cover plate.
13. Built-in cooking appliance according to claim 12, characterised in that the door grip ventilating channel (43) guides the exhausted cooling air at least in part into the interior of the cooking chamber door (9) for the cooling thereof.

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