EP0981028B1 - Process and device for cleaning of exhaust air of kitchen apparatus - Google Patents

Description

The present invention relates to a method and a Device for cleaning exhaust air from kitchen appliances, such as Steamers, grills, ovens and the like. Under "Cleaning" is also the removal of steam from the exhaust air Roger that.

In the operation of kitchen appliances, especially steamers, hot air appliances, Grills and ovens produce exhaust air that the ambient air surrounding the device can be heavily polluted. The Exhaust air contains hot water vapor, smoke, fats, oils, harmful odors and other chemical substances and Connections that result from burning fat.

To discharge the exhaust air, for example outdoors extremely expensive exhaust air systems and shafts necessary and ever also prescribed according to the application of the kitchen appliance, which causes considerable additional costs for these kitchen appliances. In addition, it is known to arise during application a significant odor nuisance in the exhaust air to the outside the surrounding area, which means the use of such kitchen appliances is limited.

If there is no exhaust air system, the room air can are so badly affected by the exhaust air that certain cooking processes, such as cooking chicken Not feasible or unreasonable in the combi steamer are.

Measures have already been proposed; which however have proven to be inadequate or uneconomical. So is a method known in which exhaust air through a water mist is directed. The disadvantage here is the extremely high Water consumption combined with the further disadvantage that Odor and smoke cannot be captured sufficiently. To improve this, activated carbon filters are also used used, which in turn are very expensive and must be disposed of regularly as special waste.

From GB-A-2281230 a device for cleaning exhaust air is also generally known Known kitchens, with an exhaust air duct for discharging exhaust air from the kitchen appliance, a pressure increasing device for increasing the pressure in the exhaust air, a liquid bath and a supply line for discharging exhaust air into the liquid bath. The device this prior art and the method that can be carried out with this device for cleaning exhaust air, however, have considerable disadvantages. Most of all is one Removal of undesirably high amounts of heat from the liquid bath is very limited or not possible at all. The natural cooling of liquids in closed Containers is very limited. Such is the use of the device according to GB-A-2281230 not possible in closed rooms directly on the kitchen appliance. Another, disadvantageous The second possibility in the prior art is to overheat the liquid bath with a desired evaporation process of the liquid when initiating To prevent exhaust air from extremely high temperatures. This only consists of the on the container attached controllable inflow of coolant into the bath and Take hot liquid out of the container via the drain. Would you however replace water in the tank due to overheating of the liquid bath, which is according to GB-A-2281230 is only intended if the liquid bath is heavily contaminated, This means that considerably larger amounts of water are lost than the evaporation that is prevented as a result.

The present invention is therefore based on the object of a method and a Device for cleaning the exhaust air from kitchen appliances, such as steamers, grills, To create ovens and the like with or with the cleaning of Effective exhaust air is made possible in a simple manner and accordingly inexpensively.

This object is achieved by the features of claim 1 and claim 5 solved.

In that at least the amount of heat introduced into the liquid bath by the exhaust air partly again via an additional heat dissipation device is actively removed, the cleaning of exhaust air becomes effective, in a very simple way and accordingly enables inexpensive.

The fact that the exhaust air through a filter, in particular a Sintered metal filter introduced into the liquid bath is advantageously achieved that the sudden Condensation of the steam produced implosion noises can be significantly suppressed. Furthermore the filter provides an additional cleaning effect generated.

The liquid bath is advantageously continuous or intermittently fresh liquid and Liquid drained from the bath. It becomes a rubbish prevents the liquid bath and continuous operation of the Kitchen appliances enables. In a first alternative while fresh liquid continuously in the liquid bath fed, making the fluid exchange easy Way is made possible.

Alternatively, the supply of fresh liquid can also be carried out batchwise respectively. For example, the fluid intake depending on the pressure boosting performance brought, d. H. increased with increased supply of exhaust air the exchange of liquids in the liquid bath.

Discontinuous is therefore not only the temporal Interruption but also the different fluid supply to understand.

Another advantage results from the fact that simple Way, the cleaned exhaust air via an exhaust air discharge device is freely applied. The cleaned exhaust air is thus returned to the ambient air.

The present invention also has an apparatus for Cleaning exhaust air from kitchen appliances, such as steamers, grills, Ovens and the like the subject. She points an exhaust air duct for extracting the exhaust air from the kitchen appliance, a pressure increasing device for increasing the Pressure in the exhaust air, a liquid bath and a supply line to supply the exhaust air to the liquid bath.

The device according to the invention for cleaning exhaust air from kitchen appliances is distinguished is characterized in that an additional heat dissipation device for active removal of heat introduced into the liquid bath by the exhaust air is provided. This will turn on easily created the possibility of an exhaust air purification device.

When the supply line emerges, there is a filter, in particular a sintered metal filter is arranged, which prevents the entry Noise generated in the liquid bath is significantly reduced. In addition, through the The exhaust air is pre-cleaned.

The liquid bath is preferably in a container, arranged in particular a closed container, the has an overflow to form a liquid level. With the help of the liquid level, the amount of liquid limited in the container and can be caused by the overflow too much liquid is being dispensed.

The feed line advantageously opens near the floor of the container, so that the exhaust air exiting there essentially the entire height of the liquid bath flows through.

Furthermore, the device according to the invention advantageously has a heat dissipation device for removing heat brought into the liquid bath by the exhaust air on. This avoids that from a certain point in time Exhaust air cleaning heated the liquid bath too much becomes and begins to evaporate itself.

Advantageously, the heat dissipation device is a heat pipe exchanger, so-called heat pipes are formed. This not only enables effective heat dissipation, but also the use of standardized and therefore cheaper Components.

It is also advantageous that the pressure increasing device a compressor, for example a radial compressor is, which also increases the pressure in a simple manner is made possible in the exhaust air. With the help of this compressor can also in the case where the kitchen appliance does not have an exhaust air discharge device has the exhaust air from the kitchen appliance be actively suctioned off. Furthermore, a fresh air supply device can also be used at the pressure booster be provided in the event that there is not enough exhaust air is available and the exhaust air then with the fresh air is mixed and introduced into the liquid bath. It is to be prevented that too much exhaust air is emitted is sucked off the kitchen appliance. By the present invention becomes the excellent achieved with the kitchen appliances Maintain the cooking result.

According to the invention, water is the effective liquid agent intended. The water becomes a special advantage only little or no foaming detergent added, which in particular collects smoke particles can be significantly improved from the exhaust air.

Because of the simple structure of the device according to the invention can be mounted directly on the kitchen appliance and use its supply connections. this has several advantages. First of all, the size is appropriate short and the cable lengths are also kept to a minimum shortened. Due to the cleaned exhaust air there are additional Exhaust ducts from the kitchen to the outside are unnecessary.

Figur 1

den schematischen Aufbau einer erfindungsgemäßen Vorrichtung zum Reinigen von Abluft aus Küchengeräten.

Further details, features and advantages of the invention will become apparent from the following description with reference to the drawing. It shows:

Figure 1

the schematic structure of a device according to the invention for cleaning exhaust air from kitchen appliances.

1 schematically shows a device according to the invention shown for cleaning exhaust air from kitchen appliances. In particular can with this device also the invention Process for cleaning exhaust air from kitchen appliances be performed.

The device 1 according to the invention has an exhaust air line 3 for discharging the exhaust air from the kitchen appliance (not shown) according to arrow 5. In the exhaust line 3 is one Pressure increasing device 7 provided, with the help the pressure in the exhaust air can be increased. Via a feed line 9 the air is introduced into a container 11, in which a liquid bath 13 is located.

At the mouth 15 of the feed line 9 is a filter 17 arranged, for example, a sintered metal filter is. The exhaust air enters through this filter the liquid bath 13 from.

Via a liquid supply channel 19 is continuous or discontinuous liquid in the liquid bath 13 introduced, as indicated by arrow 21.

The liquid bath 13 is limited in the container 11 by that due to a side overflow 23 a maximum fill level in the liquid bath 13 is formed is in the form of a liquid level 25.

The exhaust air flows from the mouth opening 15 through the filter 17 into the liquid bath 13 and rises to the top, the exhaust air as it passes through the liquid bath 13 is cleaned. Is above the liquid level 25 a discharge duct 27 is also provided for the cleaned exhaust air, which then the container 11 via the discharge channel 27th leaves according to arrow 29.

The liquid bath 13 is heated by the hot exhaust air. In order to prevent the liquid bath 13 from overheating, and the heat rise, for example to 60 ° C restrict, a heat dissipation device 31 is provided. In the illustrated embodiment, the heat dissipation device formed from so-called heat pipes. These include a heat pipe transmitter 33 on the parallel to each other extending heat dissipation plates 35 are provided. The heat-conducting plates 35 arranged in the liquid bath 13 absorb the heat and transfer it to the medium in the heat pipe exchanger 33. Outside the container 11 flows the heat dissipation plates 35 ambient air according to arrows 37 over and cools the heat dissipation plates 35 excess heat from the liquid bath 13 on simple Spread out wise.

Since the exhaust air not only steam but also smoke particles, May contain fats and oils that go to the bottom of the container 11 sink in the liquid bath 13 is a drain device for this provided, for example in the form of opening the bottom plate 39 of the container 11. It can also if necessary, the entire liquid bath 13 can be drained.

With the help of the present invention can thus be simple Efficiently cleaned the exhaust air from kitchen appliances become. The steam content can be particularly advantageous approximately 100% of the exhaust air is removed.

However, the present invention is not based on that illustrated Embodiment limited.

So the container 11 or the liquid bath 13 can be so large dimensioned that feed lines 9 from several kitchen appliances open into a container 11. The feed line can also 9 several inlet channels with corresponding mouth openings have so that a larger amount of exhaust air simultaneously through several filters into the liquid bath 13 can be introduced. The flowing past according to arrows 37 Air can otherwise be used for heating become. However, the heat dissipation device 31 can also be designed so that the heat emission side itself in a container with liquid, for example fresh water, stands, and this fresh water is heated accordingly, which in turn can be used as hot water can.

Claims (14)

1. A method of cleaning exhaust air from kitchen equipment, such as steamers, grilling equipment, baking ovens, comprising the steps of subjecting the exhaust air to a pressure increase and thereafter introducing the exhaust air into a fluid bath (13), characterised in the step of actively dissipating at least partially the thermal energy, which is introduced into the fluid bath (13) by the exhaust air, by means of a heat dissipating device (31) additionally provided for this purpose.
2. A method according to claim 1, characterised in that the exhaust air is passed through a filter (17), in particular a sintered metal filter, to introduce it into the fluid bath (13).
3. A method according to claim 1 or 2, characterised in that fresh fluid is added continuously or discontinuously to the fluid bath (13) and fluid is removed from the fluid bath (13).
4. A method according to any of claims 1 to 3, characterised in that cleaned exhaust air is vented into the ambient environment through an exhaust air venting device (27).
5. A device for cleaning exhaust air from kitchen equipment, such as steamers, grilling equipment, baking ovens, comprising an exhaust air line (3) for removing exhaust air from the kitchen equipment, a pressure boosting device (7) for increasing the pressure in the exhaust air, a fluid bath (13) and an inlet line (9) for introducing the exhaust air into the fluid bath (13), characterised in that an additional heat dissipating device (31) is provided for actively removing heat introduced into the fluid bath (13) by the exhaust air.
6. A device according to claim 5, characterised in that the inlet line has a mouth opening (15) in which a filter (17), in particular a sintered metal filter, is arranged.
7. A device according to claim 5 or 6, characterised in that the fluid bath (13) is arranged in a container (11) having an overflow (23) to form a fluid level (25).
8. A device according to claim 7, characterised in that the inlet line (9) opens near the bottom of the container (11).
9. A device according to any of claims 5 to 8, characterised in that the heat dissipating device (31) is a heat exchanger tube (33) with heat conducting plates (35), a so-called heat pipe.
10. A device according to any of claims 5 to 9, characterised in that the pressure boosting device (7) is a compressor, for example a radial compressor.
11. A device according to claim 10, characterised in that the exhaust air can be actively vented from the kitchen equipment with the help of the compressor.
12. A device according to any of claims 5 to 11, characterised in that the fluid in the fluid bath (13) is water.
13. A device according to any of claims 5 to 12, characterised in that a cleaning agent that produces little or no foam is added to the fluid.
14. A device according to any of claims 5 to 13, characterised in that the device is mounted directly on the kitchen equipment and uses the utility connection of the kitchen equipment.

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