DE9002132U1 - oven - Google Patents

Description

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This arrangement is known from DE-PS 34 42 812.7. The air is enclosed behind a ventilation plate inside the oven , which has a central intake opening and exhaust openings for the circulation of hot air inside the oven. The ventilation plate is surrounded by an air heater. The temperature sensor of a temperature regulator that regulates the heating elements is located in the oven. If the proposed arrangement is to be carried out in an airtight manner, this means that extra effort is required to drive the air duct for the circulating air fan in the oven rear wall.

EP-0 245 617 provides for a hot air duct which, when the fan is positioned centrally in the oven rear wall, has symmetrical _intake and exhaust hole arrangements. The hot air duct extends over the entire oven rear wall.

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Particular embodiments of the invention are set out in the subclaims.

According to the Neuerting, the following is based on the drawing

"Pig· 1 *iä* arrangement of a ; oven back wall,

the oven on^the

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Sectional figure corresponding to Fig. 1.

The thermal heating device, which is designed as a hot air heating system, comprises, _{in addition to} the heating element, a group of holes for upper heat 2 and a group of holes for lower heat 3, a fan 4, a fan drive 5 associated with the fan 4 and a fan wheel associated with the fan 4, a hot air housing 7 and a baking oven 8.

oven back wall &bgr;.

Fig. 1 shows the heating element 1, which extends over one half of the oven rear wall A, behind the group of holes for top heat 2 and the group of holes for bottom heat 3. The fan 4, which draws in preheated oven air A through air intake openings, is located in the half of the oven wall next to the heating element 1 ^.

TZP 90 P 604

Oven rear wall 8, at the height of the hole group for top heat 2. This arrangement of heating element 1 and fan 4 according to Fig. 1 is also conceivable as a mirror image of the selected design. The hot air housing 7 enclosing the heater 1 and the fan 4 advantageously enables the air blown radially by the fan 4 to be directed to the heater 1 with a uniform intensity. Because the oven rear wall 8 has a hole group pattern for the intake air of the hot air blower, with the fan 4 being arranged off-center in the upper half of the oven rear wall 8, the top heat and bottom heat can reach the cooking chamber in a directed manner. Since the central area of the oven rear wall B has no hot air outlet, a temperature uniformity in the cooking chamber is achieved with a reduced circulation effect of the hot air fed in. A direct supply of hot air to larger areas of the food to be cooked is thus avoided, provided that the food

placed in the middle of the cooking chamber. Due to the structural design of the hole groups- ;-

pattern for top heat 2, bottom heat 3 and the intake of the fan 4 is the cooking &iacgr;

room microwave-proof. &iacgr;

The microwave tightness of the fermentation chamber is ensured by the fact that no structural changes are necessary.' Orders that have to be passed through the oven rear wall 8 are easier to reach |

than is possible with fan shafts in the cooking chamber. The rear I

The hot air housing arranged between the hole group patterns supports the microwave (:<

Tightness of the overall arrangement <%

s According to Fig. 2, the fan arrangement and the arrangement of the hot air housing 7 can be seen in section BA. The arrangement of the fan depends on the design choice of the fan drive 5. With the principle of the hot air housing design according to Fig. 1, a good yield of the hot air heating can be achieved analogously for any fan arrangement.

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Claims (7)

I I CI ' I « I1 &bull;&igr; · - &igr;&igr; t a c ■ t &igr; . ■ · a a < ti ■ · a a · · < t c t t ■ fr:« ta t * TZP 90 P 604 Protective spray 1. Baking oven, equipped with a thermal heating device, which is a hot air heater wherein a microwave heating device can be arranged in combination therewith, characterized in that the hot air heater Ib consisting of a heating element (l) and a fan (4) is connected to a D I «&mdash; ..if_l ._ J.. 0__1._<^~_13&Lgr;-.1&mdash;._&mdash;4 /&bgr;\ L(UJlLk^. /Lu. t /I«».. /A\ .&mdash;. J s*»wn«/avi>i»t«SBVl Ba* w· iieuavjivu-nmiawaiM \«rf *#«r &bgr; a«M*«a» «·»«·, «avia When \~ ^r / «an« the heater (1) is arranged in a hot air housing (7) and that the surface area of the oven rear wall (8) determined by the hot air housing (7) has asymmetrically arranged hole group patterns for top heat (2), bottom heat (3) and the intake hole group for the fan (4). 2. Baking oven according to claim 1 and 2, characterized in that the hot air housing (7) is a structural unit whose depth is determined by a fan wheel (6) and whose circumference is determined by the outer contours of the fan wheel (6) and the heater (1). 3. Baking oven according to claim 1 and 2, characterized in that the hole group pattern for the intake air of the fan (4) is eccentrically in the upper half of the 4. Oven according to claims 1 and 2, characterized in that the hole group patterns for the upper heat (2) and the lower heat (3) are arranged off-center, adjacent to the fan (4), in the upper and lower half of the oven rear wall (8). 5. Oven according to claim 1, 2 and 4, characterized in that the central area of the oven rear wall (8) has no hot air outlet. ■-. 2- - &bull; · · &bgr; TZP 90 P 604 6. Baking oven according to claim 1, 2 and 5, characterized in that the exit area of the hole group for top heat (2) is in a ratio of approximately 2:1 to the exit area of the hole group for bottom heat (3). 7. Baking oven according to claim 1, 3 and 4, characterized in that the hole group pattern for top heat (2) and bottom heat (3) and the hole group pattern for the intake air of the fan (4) are microwave-tight due to their structural design. - r-r · '&igr;&igr; ■■ · - &igr; t ·■ ·