DE7332678U - Household appliance with electrical heating device for heating and cooking food and beverages by applying hot air to them - Google Patents

Description

Household appliance with electrical pickling device for heating and cooking food and beverages by applying hot air to them.

While in the household for food preparation, especially for the often time pressure: standing preparation of the Breakfast, automatically working devices, such as toast machine, coffee machine, automatic stove, hotplate etc. are available, the other operations, such as making a boiled chicken egg, require the Toasting frozen bread rolls etc. several times at a time tied to one another and thus still one considerable amount of work.

In addition, the ongoing rationalization of egg production, for example, has led to ever thinner and weaker eggshells and thus to an increased risk of the shell bursting during the cooking process and thus the eggs leaking out during the cooking process. The resulting loss rate and the subsequent difficult cleaning of pot ₃ dishes, etc. are increasingly perceived as annoying in the modern household. The penetration of ready meals and frozen foods requires also for the speedy ⁿ on-the-table bring ^M additional technical assistance.

In recent times are in view of the development described E.g. egg-boiling devices have been developed, b2i only those for the heat transfer and for the actual Coagulation process required small amount of water.

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sets and is vaporized. The o.e. unpleasant side effects, which cause the shell to burst and the eggs to leak out are, however, prevented by this procedure hardly toned down. The use of microwave ovens, which has recently been propagated, is also for private households too expensive because the possible uses are too limited.

The present invention describes a device which takes the development outlined above into account.

The basis is the per se known knowledge that the heating of such food surrounded by a rigid shell should take place without direct contact with a heating plate or the like. Bringing about the desired heating process is therefore in itself a pure heat conduction problem. In addition to the one that is usually selected because of its extremely high heat transfer coefficient, the heat exchanger used is that boiling water, which, however, often cannot be used, all other liquid or gaseous substances, that is e.g. hot air, in question. It is necessary for a good heat transfer to the outer shell by generating a sufficient To ensure flow velocity. The speed of the heating process is then determined by the hot air temperature, determines the heat transfer values of the shell and its contents.

Thereby has the choice of hot air as a heat exchanger opposite the choice of hot water has a surprising, but very decisive advantage:

If, for example, the shell bursts when an egg is heated, the liquid egg content does not escape, but rather coagulates locally in a matter of seconds through contact with the hot air and thus acts like a modern liquid wound closure. the This eliminates the risk of contamination of the device.

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In addition, the choice of hot air has the advantage over boiling water that the exposure temperature decreases external air pressure is independent and thus the cooking result is reproducible and that it can be freely adjusted for the desired Heating process in each case the most favorable value can be adjusted. The desired temperature can thereby be achieved set that the openings for the extraction of hot air are specially dimensioned so that a certain amount of heat accumulates arises.

In Figure 1 is a working according to the above method combined For example, hot air cooking device is shown. In the heating base part there is a heating element (2) to heat the air. The base plate (5) of the i & t device is perforated. Spacers (4) ensure that the air is sucked in through the perforated base plate (3) with sufficient free cross-section. The ones from Air heated to the heating element (2) passes through the distributor plate (5) into the lower hot-air cooking space (6) as a result of convection. In this way, openings (7) are arranged in the distributor plate (5) and designed as nozzles that bundled hot air jets are created, which hit the rounded underside of the here, for example, eggs (9) resting in the support frame (8) are directed. The hot air jets flow around the ones to be heated Units with a considerable flow velocity and thereby cause an even and increased heat transfer the good. The hot air flow dissolves, as shown in Figure 1, at the top of the Elss and leaves the device through special dimensioned openings (1o) in the upper hood (11).

The device is constructed in a tower construction in such a way that the lower fermentation chamber (6) forms the special carrying devices containing middle part (12), exchangeable 1st.

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To ensure the desired tangential air flow on the egg surfaces, the openings or support points are (1?) In the support frame (8) not round, but with a jagged or wavy contour. The middle part (12) is in his Outer dimensions designed so that it is on the one hand the heating base is essentially tightly adapted and thus prevents undesired air flow at the periphery, On the other hand, it also allows the filled middle part to be loaded without reloading the heated goods - possibly after a short time Retractable corners - can be placed directly on the table. The handles (14) are used for this purpose. The hood (11) is up to the Carrying frames pulled down. It can therefore be used directly as a warming hood, both in conjunction with the Middle part (11) as well as directly in connection with the heating base (1).

There is a in the heating circuit to regulate the air temperature. Temperature sensor (15) arranged by its bimetal system interrupts the heating current when a specified temperature is reached and the heating current when the temperature falls below it at a lower predetermined temperature. Tests have shown that the air temperature to achieve Good cooking results should be at least 110 ° C, preferably but should be between 12o ° C and 15o C, depending on which degree of cooking is required inside. Of course By using a control thermostat, the cooking result can also be influenced according to subjective taste preferences will.

For preselection and automatic timing of the cooking process, there is a power supply (16) in the area Clock (17) arranged. Depending on the embodiment, it can be equipped with an electrical breaker contact that acts on the heating circuit be equipped and thus end the cooking process automatically after the preselected time, and / or only give an acoustic signal. In this case the

Time clock can also be arranged in the area of the hood (11).

The tower-like structure of the device has the additional advantage of that the heating base part (1) can also be used separately to keep food and drinks hot.

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Claims (9)

I ti Il <I Il Krafeld, September k, 1973; Protective carefree house hold gavat with electric heating device for heating and baring food and beverages, preferably eggs and ready-made meals, by means of construction aahlagan with hot air, 1. characterized in that the bottom (3) downwards for suction let open by cold air, while the top cover (11) openings (1Q) aufUBiBt, with a cross-section smaller than that of the openings in the base (3) and bo bsmeassn is that a defined lüarmeatau arises ^ 2. Berat according to claim 1, characterized in that it is sub one the ElaktroteilB load-bearing hot air generator (1), a Tragevorriotung (β) for the area (6) to be heated and the cover (11) consists. 3. BerBt according to speeches 1 and 2, characterized in that the hot air generator (1), bar space (6) and cover (11) are designed as separate, tower-like units that can be placed on top of one another. / k, BerBt according to one or more of the above claims, characterized in that the bar space (6) has carrying devices (β) which have special openings (13) adapted to the butt to be held for inserting the butt. » 5. BerBt according to one or more of the above claims, characterized in that that the contours of the openings (13) for the hot air to flow through are undulating. / 6 advice according to one or more of the above claims, characterized in that that the bar space (6) in the lower area openings (7) for the inlet of Has hot air / 7. BerBt according to one or more of the above claims, characterized in that that the openings (7) are arranged so that the air flow on the Center of the applied butt points. / 8. BerBt according to one or more of the above claims, characterized by » that the openings (7) are dOeen-shaped so that they are bundled Air jets arise / 9. Berat or one or more of the above claims, characterized by that the openings (10) in the cover (11) preferably eel cloth in their arranged in the lower area