DE20218390U1 - Cooking device with a substantially closed water circuit comprises at least one screening and separating unit which is incorporated as a slightly convergent wall structure within a substantially vertical pipe - Google Patents

Abstract

The cooking device with a substantially closed water circuit comprises at least one screening and separating unit (1) which is incorporated as a slightly convergent wall structure in a substantially vertical pipe (2), and serves to exclude from the circuit dirt particles, cooking residues and fat and/or water polluted by them.

Description

The present invention relates to a cooking device with an essentially closed water cycle.

Water is an essential component of that within a cooking appliance Is used. For example, when cooking food inside of a cooking device water is needed to steam the food with moisture and a certain one Maintain moisture content within the cooking space. Further For example, water can also be used within a cooking appliance find the cooking appliance after the cooking process, if necessary using additional Detergents to clean.

It is desirable that water, which is inside a cooking device is used in a closed circuit can, on the one hand, save costs and, on the other hand, water itself for environmental reasons to be able to save. The problem in this regard, however, is that circulated water within a cooking appliance frequently through coarse or fine dirt particles, such as small food particles and the like is contaminated. Such contamination is disadvantageous especially when using a circulation pump or also nozzles through which the circulated water is to be pumped or guided. Pumps and Nozzles can do that clog slightly and interrupt the water cycle.

It is from the state of the art known for cleaning circulating water from coarse dirt mechanical Use filter systems. A disadvantage of these is mechanical Filter systems that they cleaned regularly Need to become. Provided this cleaning is not done properly, which is in practice frequently can occur, it occurs due to a clogging of the filter system failure of this system due to insufficient throughput.

In the DE 19 62 641 Such a filter system is dispensed with within a closed water circuit in a cabinet for the heat treatment of meat or fish products, since the water there is not passed through nozzles which require filtering thereof in order to avoid clogging of the nozzles. Rather, the liquid is fed back into the cooking chamber via specially designed suction lines.

The U.S. 3,986,891, the one self-cleaning dishwasher and furnace combination disclosed, dispenses with the use of a Filter system. For the separation of impurities within the circulated Rather, water is proposed that a fan system with a fan and a screen is used, on which the impurities can precipitate.

A disadvantage of the prior art is, however, that the Efficiency is insufficient, i.e. the amount of water that after Separation of the contaminants can be returned to the water circulation system, is not satisfactory. Furthermore, the fan system in particular that is known from the prior art, structurally complex and has a high degree of maintenance on.

From the DE 38 12 136 A1 a method and a device for rainwater detection is known, the device comprising a sieve device and a rainwater separation device. The sieving device separates coarse components, such as leaves, moss and insects, from the rainwater, while the rainwater separation device comprises fine filter functions in order to separate the smallest impurities with a mesh size of approximately 0.28 mm. The cleaned water can be collected in a storage tank or used directly in a domestic water system, for example for a washing machine or a toilet flush, while dirt particles or the water loaded with dirt particles can be led directly into a sewer. The DE 38 12 136 A1 focuses exclusively on the concerns and problems with rainwater collection and does not provide any further information.

The present invention lies now the task of a generic cooking device with an essentially provide closed water cycle, which has the disadvantages of the state of the art, in particular, a high level of maintenance and efficiency, in particular also an effective water recovery, for a cleaning or filter system in the water cycle.

The object is achieved in that in the water cycle within at least one substantially vertical or inclined Tube at least one screening and separating device essentially vertically and / or as part of the pipe wall and / or itself in the direction of fall or flow of the water is at least slightly tapered towards the inside of the tube is about which Dirt particles, cooking residues and / or fat and / or loaded with dirt particles, cooking residues and / or fat Water can be removed from the circuit is or are.

It is preferably provided that Screening and separating device at least partially of dirt particles, Residue and / or Fat-free water can be returned to the water cycle.

It is particularly preferred that the sieve and separating device comprises at least one fine filter.

It is also provided that the fine filter is a stainless steel filter and a mesh size of about 0.1 mm to about 0.5 mm, preferably from about 0.2 mm to about 0.4 mm.

In addition, the invention alternatively provides that the fine filter is a metal wool molding, open-cell foam, such as polyurethane foam, fleece or the like.

In particular, it can be provided that the Screening and separating device comprises at least one coarse screen, the at least the surface of the fine filter facing the tube interior is upstream in some areas or rests on it.

It is preferred that the coarse screen essentially comprises smooth metal or plastic ribs which in particular a distance of about 1 mm to about 1 cm to each other exhibit.

The invention further provides that the sieve and Separating device a multi-walled, in particular a circumferential completely encircling, hollow body, in particular a double-walled hollow cylinder with a water-permeable inner wall, in particular at least in some areas in the form of a coarse sieve and / or a fine filter with a coarse screen upstream or on top, and an impermeable outer wall and at least one process for includes purified water which is integrated in the tube.

It can preferably be provided that the fine filter a roughened surface having.

It is also preferably provided that the Screening and separating device, in particular the fine filter and / or the coarse sieve backwards, in Falling direction of the water spreading, lamellar formations having.

One embodiment of the invention provides that dirt particles, Cooking residues and / or fat and / or loaded with dirt particles, cooking residues and / or fat Water can be discharged into a sewage pipe.

It is also provided that the sieve and separator essentially no cross-sectional constriction generated in the vertical tube.

It can also be provided that the vertical Tube is composed of plug-in parts and the sieving and separating device is designed to be removable from this tube.

A preferred embodiment the invention provides that above the screening and separating device, the tube is at least along one Section plate-like or funnel-shaped, especially in the direction expanded the entire circumference of the tube, being on the plate-like or funnel-shaped Section the speed of incoming water can be slowed down is.

It can also be provided that the plate-like or funnel-shaped Section of its outer edge to the pipe, at least in some areas, terrace or step and / or is inclined in waves.

There is an inlet on the side, especially at height the upper edge, the plate-like or funnel-shaped section is arranged to be advantageous.

It is also preferably provided that the diameter the plate-shaped Device in relation to the height the plate-shaped Device and / or the screening and separating device is large, preferred a relationship from about 2: 1 to about 10: 1, particularly preferably 5: 1.

An embodiment of the invention also provides a measuring device for measuring the water flow through the sieve and separator.

There is also a tax and control device in operative connection with the screening and separating device and / or the measuring device.

According to another aspect of Invention can be provided that the surface of the Pipe interior facing outer surface of the sieve and separating device, in particular of the coarse screen, at least in some areas non-polar and / or hydrophobic and / or the surface facing away from the inside of the tube area the screening and separating device, in particular the coarse screen, at least is or are designed to be hydrophilic and / or polar in some areas. This embodiment causes due to the affinity of the fats to hydrophobic or non-polar surfaces an effective and early Separation of the same from the contaminated water.

Finally, the water inside of the water circuit for steaming food within a cooking space of the cooking device, be usable for cleaning the cooking space or the like.

The invention is therefore the surprising finding based on that by the special, in particular essentially vertical, arrangement a screening and separating device within a vertical tube the water circuit of the cooking device according to the invention is almost 100% maintenance-free the sieving and separating device is reached, wherein also about 90% of the water can be circulated in the system while only about 10% of the water as water loaded with dirt particles is to be removed from the system.

The cooking device of the present invention has in particular a Screening and separating device, which has no dead space, in which dirty parts could collect. This encourages the cooking appliance is maintenance-free, otherwise often the water circulation system opened and would have to be cleaned.

Because of the vertical or inclined Arrangement of the screening and separating device within the circulatory system of the cooking appliance there is no way that itself Dirt particles for a longer one Can store time. Coarse dirt particles fall directly into the screening and separating device through and are dissipated while Water through the sieve and Separator flows, to be collected separately from the dirty water and the cooking appliance again supplied to be able to. The water circulation system of the cooking device according to the invention can be operated continuously become.

The sieving and separating device of the cooking device according to the invention preferably comprises a fine filter and a coarse sieve which is located upstream of the fine filter. Water to be cleaned flows through the filter and screen fabric, whereby the effectiveness is achieved through the resulting adhesive forces between fine filter and coarse screen. The sieving and separating device is preferably a hollow cylindrical ring within a vertical tube, which ring can possibly taper somewhat downwards. The flow behavior of the water flowing through the sieving and separating device can be improved if the fine filter has a roughened surface. An improvement in the adhesive forces can be achieved by designing the screening and separating device at the rear with lamellar formations which spread out in the direction of the water. In order that the water to be cleaned can be passed over the sieving and separating device with a maximum of uniformity, a cooking device is preferred which comprises a plate-like, possibly covered device above the sieving and separating device, on which the speed of inflowing water is slowed down can. This plate-like device is particularly preferably inclined in the manner of a terrace or step in the direction of the, in particular centrally attached, vertical pipe extension, so that a terrace-like structure of several calming zones is achieved. Water flowing onto the plate-like device slows down due to its rotational movement on the device and gradually runs from the edge of the device to the pipe opening. In such a way calmed water can be passed extremely evenly over the sieving and separating device of the cooking device according to the invention, which in particular improves the efficiency of the sieving and separating device.

Other advantages and features of Invention emerge from the following detailed description of preferred embodiments of the cooking device according to the invention, which are explained in detail using schematic drawings. It shows:

1 an embodiment of a sieving and separating device for a cooking device according to the invention in cross section;

2 a plate-like device in cross section, which is arranged on a vertical tube; and

3 an enlarged cross-sectional section of the embodiment of in 2 shown plate-like device.

1 shows a screening and separating device 1 , which can be used in a closed water circuit within a cooking device according to the invention (not shown). The screening and separating device 1 is inside a vertical tube 2 arranged. The screening and separating device 1 includes a coarse sieve 3 that is essentially vertical within the tube 2 is arranged. The coarse sieve 3 a fine filter is arranged downstream 4 that the coarse sieve 3 coaxially surrounds. How out 1 can be seen is the coarse sieve 3 somewhat tapered towards the bottom.

When using the screening and separating device 1 Within a closed water circulation system in the cooking device according to the invention, circulating water, which can be loaded with dirt particles, reaches the sieving and separating device from above 1 and first reaches the surface of the coarse screen 3 where the water is freed from coarse components such as leaves, moss and insects. These coarse constituents either fall vertically past or through the sieving and separating device or, if they pass the coarse sieve 3 adhering, flushed into a sewer, not shown, by water flowing in. The water, which has been freed from coarse particles, but which may still be contaminated with smaller constituents, arrives after passing through the coarse sieve 3 through the fine filter 4 , Adhesive separating forces act in particular in the sieving and separating device, which ensure excellent cleaning of the water. That through the fine filter 4 purified water finally ends up in a collection area 5 , from where it is either returned to the water circulation system or collected in a larger storage. Of course, it is conceivable that the purified water can also be used in devices other than the cooking device according to the invention.

In a preferred embodiment, the screening and separating device 1 Spreading backwards in the direction of the water, lamella-like formations improve the adhesive separation of water and dirt particles.

It will be readily apparent to those skilled in the art that the screening and separating device 1 , in the 1 can be modified in numerous ways without departing from the scope of the present invention. For example, instead of in 1 shown hollow cylindrical screening and separating device 1 a plate-like arrangement of a sieving and separating device can also be provided, which is constructed, for example, from a coarse sieve made of smooth metal or plastic ribs and a downstream plate-shaped fine filter sieve. In this embodiment, dirty water is passed evenly over the essentially vertically arranged ribs and then led to the downstream fine filter screen. Due to the steep arrangement of the ribs and the fine filter screen, dirt particles are easily led into a waste water drainage system by the inflowing water.

In 2 is a plate-like device 6 shown in cross section on a tube 2a is arranged, in which a screening and separating device, not shown, is arranged. Will water from a substantially lateral direction through an inlet 10 on the plate-like device 6 given, so arises on the plate-like device 6 a circular flow of water. Similar to a roulette ball on a roulette table, however, the speed of the water slows down over time and the water approaches the pipe opening 8th of the pipe 2a and finally gets into the pipe 2a and into the screening and separating device. Through the plate-like device 6 the speed of the inflowing water is greatly reduced, which ensures an extremely even distribution of the water over the surface of the sieving and separating device. In particular, this improves the efficiency of the screening and separating device. After flowing through the sieving and separating device, purified water can pass through an outlet 11 be returned to the water cycle.

The plate-like device is preferred from its edge 7 towards the pipe opening 8th slightly inclined. In a preferred embodiment, which in 3 shown is the plate-like device 6 in a terrace or step arrangement from its edge 7 on the pipe opening 8th inclined and thus provides several calming zones 9 ready. The slower the flow of the incoming water, the more the water runs on a terrace or a step 9 deeper, which additionally calms the water and increases the efficiency of the following sieving and separating device. The sieving and separating device for the cooking device according to the invention is essentially self-cleaning and only requires short maintenance intervals.

The in the description above, in the claims as well as features of the invention disclosed in the drawings can both individually as well as in any combination for the realization of the invention in its various embodiments.

1

Scree- and separator

2, 2a

pipe

3

coarse screen

4

fine filter

5

collecting area

6

plate-like contraption

7

edge

8th

tube opening

9

calming zone

10

Inlet

11

outlet

Claims (21)

Cooking appliance with an essentially closed water circuit, characterized in that in the water circuit within at least one essentially vertical or inclined tube ( 2 . 2a ) at least one screening and separating device ( 1 ) essentially vertically and / or as part of the pipe wall and / or in the direction of fall or flow of the water towards the inside of the pipe ( 2 . 2a ) is arranged at least slightly tapered, via which dirt particles, cooking residues and / or fat and / or water loaded with dirt particles, cooking residues and / or fat can be removed from the circuit. Cooking appliance according to claim 1, characterized in that the sieving and separating device ( 1 ) water at least partially freed from dirt particles, cooking residues and / or fat can be returned to the water cycle. Cooking appliance according to claim 1 or 2, characterized in that the sieving and separating device ( 1 ) at least one fine filter ( 4 ) includes. Cooking appliance according to claim 3, characterized in that the fine filter ( 4 ) is a stainless steel filter and has a mesh size of about 0.1 mm to about 0.5 mm, preferably from about 0.2 mm to about 0.4 mm. Cooking appliance according to claim 3, characterized in that the fine filter ( 4 ) is a metal wool molding, open-cell foam, such as polyurethane foam, fleece or the like. Cooking appliance according to one of claims 3 to 5, characterized in that the sieving and separating device ( 1 ) at least one coarse sieve ( 3 ) includes that of the surface of the fine filter ( 4 ) is upstream at least in some areas or rests on it. Cooking appliance according to claim 6, characterized in that the coarse sieve ( 3 ) comprises essentially smooth metal and / or plastic ribs, which are in particular at a distance of about 1 mm to about 1 cm from one another. Cooking appliance according to one of claims 3 to 6, characterized in that the sieving and separating device ( 1 ) a multi-walled hollow body, in particular a circumference completely encircling it, in particular a double-walled hollow cylinder, with a water-permeable inner wall, in particular at least in regions in the form of a coarse sieve ( 3 ) and / or a fine filter ( 4 ) with upstream or on top of the coarse screen ( 3 ), and a water-impermeable outer wall and at least one drain for purified water that flows into the pipe ( 2 . 2a ) is integrated. Cooking appliance according to one of claims 3 to 8, characterized in that the fine filter ( 4 ) has a roughened surface. Cooking appliance according to one of claims 3 to 9, characterized in that the sieving and separating contraption ( 1 ), especially the fine filter ( 4 ) and / or the coarse sieve ( 3 ) rearward, in the direction of the water spreading, lamella-like formations. Cooking appliance according to one of the preceding claims, characterized in that that dirt particles, Residue and / or Fat and / or loaded with dirt particles, cooking residues and / or fat Water can be discharged into a sewage pipe. Cooking appliance according to one of the preceding claims, characterized in that the sieving and separating device ( 1 ) essentially no cross-sectional constriction in the pipe ( 2 . 2a ) generated. Cooking appliance according to one of the preceding claims, characterized in that the tube ( 2 . 2a ) can be assembled from plug-in parts and the screening and separating device ( 1 ) this pipe ( 2 . 2a ) is designed to be removable. Cooking appliance according to one of the preceding claims, characterized in that above the sieving and separating device ( 1 ) the pipe ( 2a ) along at least one section ( 6 ) plate-like or funnel-shaped, in particular in the direction of the entire circumference of the tube ( 2a ) expanded, whereby on the plate-like or funnel-shaped section ( 6 ) the speed of incoming water can be slowed down. Cooking appliance according to claim 14, characterized in that the plate-like or funnel-shaped section ( 6 ) from its outer edge ( 7 ) to the pipe ( 2a ) is at least partially inclined in terraces or steps and / or waves. Cooking appliance according to claims 14 or 15, characterized by an inlet ( 10 ), the side, especially at the level of the upper edge, the plate-like or funnel-shaped section ( 6 ) is arranged. Cooking appliance according to one of claims 14 to 16, characterized in that the diameter of the plate-shaped device ( 6 ) in relation to the height of the plate-shaped device ( 6 ) and / or the screening and separating device ( 1 ) is large, preferably has a ratio of about 2: 1 to about 10: 1, particularly preferably 5: 1. Cooking appliance according to one of the preceding claims, characterized by a measuring device for measuring the water throughput through the sieving and separating device ( 1 ). Cooking appliance according to one of the preceding claims, characterized by a control and regulating device in operative connection with the sieving and separating device ( 1 ) and / or the measuring device. Cooking appliance according to one of the preceding claims, characterized in that the surface of the outer surface of the sieving and separating device facing the tube interior ( 1 ), especially the coarse screen ( 3 ), at least in some areas non-polar and / or hydrophobic and / or the surface of the surface of the screening and separating device facing away from the tube interior ( 1 ), especially the coarse screen ( 3 ) is or are at least partially hydrophilic and / or polar. Cooking appliance according to one of the preceding claims, characterized in that that this Water inside the water circuit for steaming food inside a cooking space of the cooking appliance to Cleaning the cooking space or the like can be used.