RU2252687C2 - Set for cooking eggs - Google Patents

Abstract

FIELD: set for cooking eggs refers to arrangements for cooking eggs in a microwave oven.

SUBSTANCE: the set for cooking eggs has a main capacity for water transparent for microwave radiation and installed in it another capacity with a lid for a product. The capacity for a product and its lid are made from material nontransparent for microwave radiation. The walls and the bottom of the capacity for a product are fulfilled perforated. Space of the main capacity cross-section limited by inner walls in its the most wide part exceeds the space of the cross-section of the capacity for a product covered with a lid for a given magnitude. The function of a lid for the main capacity fulfill concave inside the edges of its entry opening. The lid on the capacity for a product is fulfilled cambered.

EFFECT: this construction of the set for cooking eggs increases effectiveness of technological process and execution of the lid of the inner capacity cambered allows to scatter microwave radiation off in different direction from the wave guide.

4 cl, 2 dwg

Description

The proposed egg cooker relates to devices for cooking, in particular to devices for cooking eggs in the microwave.

A microwave oven is known, consisting of a transparent for microwave radiation, for example, a glass container for water, mounted inside this container of the egg tray, made of metal - a material opaque to microwave radiation, and the container for water is equipped with a metal lid, which is completely on top closes microwave path to product and water to be heated. A separate pan-shaped cell is provided in the metal tray for placing each egg, and there are no holes in the walls of these cells through which heated water or steam could directly contact the eggs to be cooked. The water in the glass container is located under the pan and is heated only by reflected lateral microwave radiation, and the pan and the eggs themselves are heated by the steam generated by boiling water. At the end of cooking, remove the lid from the glass container and then use the two forks to remove the egg tray [1].

The disadvantage of the above egg cooker is that in it the water to be heated is largely shielded from the effects of microwave radiation by the metal elements of the device. Another disadvantage of the known egg cooker we see in the low efficiency mediated through steam heating and cooking eggs.

Known egg cooker for a microwave oven, consisting of a water-filled main container with a lid that is transparent to microwave radiation, installed inside this container another, enclosed product container, protected from microwave radiation by a lid, and the product container and its lid are made of opaque material for microwave radiation, for example from metal, and the walls and the bottom of the enclosed container for the product are perforated, and the area bounded by the inner walls is transverse cross section of the main tank in its widest part exceeds the area of this section covered by a metal cover by a predetermined value [2]. The lid on the main tank prevents excessive evaporation of water, thereby contributing to more efficient cooking of eggs.

We see the disadvantages of this egg cooker in that it consists of a fairly large number of components. Another disadvantage is that the upper part of the lid for the product is made flat and its outer surface is oriented horizontally, i.e. perpendicular to the outgoing primary microwave radiation. As a result of this, the radiation reflected from the surface of the lid is directed toward the microwave radiation generator and can lead to disruption of its operation [3]. The third disadvantage of the known egg cooker is that the flat bottom of the product container rests directly on the flat bottom of the main vessel and therefore there is no gap between the two bottoms that could be filled with water. As a result of this, the conditions for convection heating of water inside the product container are significantly worsened. If there was a layer of water between the bottoms of the main and enclosed tanks, the latter would be primarily heated by microwave radiation reflected from the bottom of the microwave oven. The water heated in this part of the main tank through the perforated bottom could move inside the enclosed tank, accelerating the process of heating the water filling it to the temperature necessary for efficient cooking of eggs.

An egg cooker for a microwave oven according to Japanese patent No. 2000-107033 [2] is considered as a prototype for the device we claimed.

The objective of our proposal is to simplify the design and increase the efficiency of the process.

When realizing the task, a positive technical result is achieved due to the fact that in the well-known egg cooker, consisting of a main container for water transparent for microwave radiation, installed inside this container of another container for the product, a lid protected from microwave radiation, moreover, the container for the product, and its lid is made of a material opaque to microwave radiation, for example metal, and the walls and bottom of the product container are perforated, and the area is limited about the inner walls of the cross section of the main container in its widest part, exceeds the area of this section covered by a metal cover by a predetermined amount, the upper edges of the main container are bent inward, and the upper part of the cover on the product container (enclosed container) is made curved (convex). In addition, on the wall of the upper part of the enclosed container around its perimeter there is one girdle or several separate protrusions, with the help of which it rests on the edges of the main tank bent inward. In another embodiment of the egg cooker, the legs attached to its bottom perform the function of supporting elements in the product container.

The invention is illustrated by drawings, where: in Fig.1 shows the 1st embodiment of the egg cooker, in section; figure 2 - 2nd embodiment of the egg cooker, in section.

An egg cooker consists of a main (external) open from above transparent for microwave radiation, for example, a glass container 7 (figure 1). The upper edges 2 of this container are bent inward. An internal, for example, metal container 3 is inserted into the outer container 1, in the walls and bottom of which numerous perforations 4 are made with a diameter of not more than 3 mm. In the upper part of the tank 3 there is a protruding outward band 5, with which it rests on the inwardly bent edges of the inlet opening of the outer container 1. Instead of a continuous girdle 4, several separate protrusions can perform the support function for the inner container (not shown in Fig. 1). In this case, between the bottoms of the inner and outer containers there remains a gap of a predetermined value. The egg container is covered with a metal lid 6 with a spherical surface curved outward. Openings for the release of excess steam (with a diameter of less than 3 mm) can be made in the lid 6 or in the walls of the inner container above the girdle 5. The glass and metal containers in cross section can be not only round, but also have, for example, a square shape. (Numerous openings made in the housing of the vessel 2, with a diameter of not more than 3 mm, almost completely exclude the penetration of microwave radiation through them, the frequency of which in microwave ovens is 2450 MHz [3]).

Eggs 7 are laid in the inner container 3, after which it is inserted into the outer container 7. The required amount of room temperature water is poured into the egg cooker. The metal container 3 is covered with a lid 6, then the egg cooker is placed in the microwave and the desired cooking mode is set. The primary heating of the water filling the space between the walls of the outer and inner containers is carried out by microwave radiation emanating both from above, directly from the waveguide, and radiation previously reflected from the inner walls of the working chamber of the furnace. Thanks to convection, the temperature of the water in the tank 3 after a while reaches the required values. At the end of cooking, the lid 6 is removed from the egg cooker and the metal container 3 is removed from the glass container 1. After that, the welded eggs 7 are cooled with cold water.

The inwardly bent edges of the inlet of the main container serve as a lid, preventing the free exit of steam and thereby increasing the efficiency of the egg cooking process. Water located in the space between the bottoms of the main and enclosed containers is primarily heated by radiation reflected from the bottom of the microwave oven. The water heated in the inter-bottom zone due to convection rises, displacing less heated water from the tank 3, which contributes to a more rapid achievement of the desired cooking temperature.

According to a second embodiment of the device, the microwave egg cooker consists of a main glass container 8 transparent to microwave radiation (FIG. 2) for water installed inside this container of another egg container 9 made of an opaque material for microwave radiation, for example, metal. The main tank 8 is made in the form of a bowl with a flat bottom 10 and with diverging walls. The upper part 11 of the walls of the main tank is bent towards the center, as a result of which its inlet is narrowed. The egg container 9, open at the top, is equipped with handles 12 and four legs 13. Numerous perforations 15 (with a diameter of not more than 3 mm) are made in the walls and bottom 14 of the vessel 9, through which, during cooking, the water flows at different temperatures between containers 8 and 9. Interchange Separate cup-shaped recesses can be made for each egg at the bottom of the metal container 9.

The tank 9 on top is protected from microwave radiation from the furnace by a curved metal cover 16 (Fig. 2), which is equipped with a handle 77 made, for example, of fluoroplastic. To exit the excess steam generated by boiling water in an egg cooker, several holes with a diameter of not more than 3 mm were made in the metal lid.

Cooking eggs in a microwave oven using an egg cooker shown in figure 2, is as follows. In the main container 8, insert the container 9 with the eggs 7 laid in it. Then, a predetermined amount of water is poured into the egg cooker. After that, the inner container 9 is closed with a lid 16, the egg cooker is placed in the microwave and the appropriate cooking mode is set. Water heating, primarily occurring in the main tank 8, is carried out both due to microwave radiation coming from the outlet of the furnace waveguide (not shown) and penetrating into the main tank from above through its edges 11 bent to the center, and due to radiation reflected from the walls the working chamber of the furnace and penetrating into the tank 8 through its walls and bottom 10. Due to convection, heated water from the tank 8 through openings 15 moves to the metal tank 9, and relatively colder water from the tank 9 moves to the tank 8. B Due to this, from the very first minutes after turning on the microwave oven, the eggs begin to be exposed to heat, i.e. the process of cooking them begins. At the end of cooking, the egg cooker is removed from the oven and the vessel 9 is removed from the main vessel 8, allowing hot water to fill it to flow into the main vessel. After that, the eggs 7 in the container 9 are cooled with cold water.

In an egg cooker of the above construction, we cook hard-boiled eggs at a microwave power of 450 W for 13 minutes. Initially, room temperature water is poured into the egg cooker.

In the proposed egg cooker for the microwave oven, in contrast to the known prototype egg cooker [2], egg cooking is more efficient, because water heating in it is also carried out from below, from the bottom. There is no need to close the main, outer container with a separate lid, because the function of the latter is performed by the edges of the named container bent inward. Due to the presence of supporting elements on the inner container, for example, in the form of a girdle at its upper end or legs at its bottom, space is formed between the bottoms of both containers and the water filling it can be heated by microwave radiation reflected from the bottom of the furnace. As a result, the process of heating water, and therefore the process of boiling eggs, will proceed more efficiently. In addition, in the proposed egg cooker, the lid on the inner container is made curved (convex). Due to this, microwave radiation is scattered to the sides and will not fall back into the waveguide. This prevents the possibility of its negative effect on the microwave generator.

The proposed device can be used not only for cooking eggs, but also for cooking products in the shell, such as sausages.

Sources of information

1. German patent No. 3300663, M. cl. A 47 J 29/00.

2. Japan Patent No. 2000-107033.

3. Sapunov G.S. Repair of microwave ovens. M .: Solon, 1998, 268 p.

Claims (4)

1. An egg cooker consisting of a main container for water, transparent for microwave radiation, installed inside this container of another container for the product with a lid, both the container for the product and its lid are made of a material that is not transparent for microwave radiation, and the walls and the bottom of the product container is perforated, and the cross-sectional area of the main container bounded by the inner walls in its widest part exceeds the area that is overlapped by the lid located on the product container th section by a predetermined value, characterized in that the cover function to operate the main container inwardly bent edge of its inlet opening, and the lid on the container for the product is made convex. 2. An egg cooker according to claim 1, characterized in that on the wall of the upper part of the product container around its perimeter there is one girdle or several separate protrusions, with which it rests on the edges of the main container bent inward. 3. An egg cooker according to claim 1, characterized in that the function of the supporting elements of the product container is performed by legs fixed at its bottom. 4. An egg cooker according to claim 1, characterized in that the lid of the product container is made of metal.

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