WO2009103659A2

WO2009103659A2 - Device for producing pure water from untreated water, and a method therefor, and further electric motor with fan wheel and seal at a blower wheel

Info

Publication number: WO2009103659A2
Application number: PCT/EP2009/051645
Authority: WO
Inventors: Stephan Peter Dieudonné; Arno Koch; Sascha Groom; Ingo Ehring; Dirk Röllinghoff; Dirk Schmidt; Thomas Erner
Original assignee: Vorwerk & Co. Interholding Gmbh
Priority date: 2008-02-23
Filing date: 2009-02-12
Publication date: 2009-08-27
Also published as: WO2009103659A3

Abstract

The invention relates to a method for treating demineralized pure water (2) in a device (1) for drinking, and such a device (1), in particular for the treatment of pure water (2) produced from untreated water, wherein treatment materials (5) such as minerals and/or taste enhancers are added to the pure water (2). In order to further improve such a method or device, it is proposed that the treatment material (5) is introduced to the flowing pure water (2) or is added to it by way of the pressure (P) of the pure water (2) itself.

Description

Apparatus for producing pure water from raw water, and method for this purpose, as well as further electric motor with fan and sealing on an impeller

The invention firstly relates to a process for the ready-to-drink treatment of demineralized pure water in a device, in particular of pure water produced from raw water, wherein the pure water treatment substances such as minerals and / or flavorings are added.

It is known to purify raw water for drinking water treatment by distillation or evaporation method. The purified and thereby demineralized water is added for remineralization for physiological and taste reasons, processing substances such as minerals and flavorings. This is done in a known manner by Einmi- see in a pure water-storing tank. From DE 10 2006 013 019 Al a method and apparatus for recovering pure water is known, in which the pure water is passed through mineral-containing solids for remineralization. In addition, it is known to make raw water for drinking water treatment also using reverse osmosis or by Ii digliche filtration.

In view of the above-described prior art, a technical problem of the invention is seen in further improving a method of the type in question.

This problem is solved first and foremost by the subject matter of claim 1, wherein it is pointed out that the treatment substance is introduced into the flowing pure water via the pressure of the pure water itself. As a result of this refinement, a method is achieved in which The input of treatment substances is directly dependent on the pure water to be remineralised. It is thereby achieved a self-control. The pressure generated by the pure water triggers the output of treatment substances directly or indirectly. The pressure of the pure water can in this case act directly on the treatment substance or on a container receiving the treatment substance. In a further preferred embodiment, the pure water has a negative effect on the treatment substance to be introduced.

Further features are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 1 or with features of further claims. But they can also be in an assignment to only individual features of claim 1 or the respective further claim or each independently of importance.

Thus, it is provided in a development of the subject invention that the treatment material is fed by differential pressure to the pure water. For this purpose, the pure water is preferably passed through a drain line to a take-off point or to a storage container for the remineralized pure water, in which drain line a feed line for the treatment material flows. In the connection area a differential pressure is reached, so for example by minimizing the cross section of the pure water leading drain line. Thus, it is further preferred that the treatment substance is supplied to the pure water by means of a venturi nozzle penetrated by the pure water. Such a venturi nozzle has a cross-sectional constriction in the discharge line traversed by the pure water, in which cross-section narrowed region the feed line of the treatment material flows. The velocity of the pure water flowing in the drain line increases in proportion to the cross sections when flowing through the cross-section reduced Area. At the same time, the pressure in the supply line, which creates a vacuum, for sucking and introducing treatment substances into the flowing pure water.

The invention further relates to a device for ready-drinking treatment of demineralized pure water, in particular of pure water produced from raw water, wherein the pure water treatment substances such as minerals and / or flavor substances are zusetzbar.

Devices of the type in question are, as described above, known.

In view of the known prior art, a technical problem of the invention is seen in a device of the type in question to further improve.

This problem is solved first and foremost by the subject matter of claim 4, wherein it is pointed out that the treatment substance applied to the pure water via the pressure of the pure water is added. According to this embodiment, a device is provided in which the entry of treatment substances is directly dependent on the re-mineralizing pure water. It is thereby achieved a self-control. The pressure generated by the pure water triggers the output of treatment substances directly or indirectly. The pressure of the pure water hereby acts directly on the treatment substance or on a container receiving the treatment substance. In a further preferred embodiment, the pure water has a negative effect on the treatment substance to be introduced. Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 4 or with features of further claims. But they can also be in an assignment to only individual features of claim 4 or the respective further claim or each independently of importance.

In a preferred embodiment, the treatment substance is accommodated in a container, which container is further pressurized in a pure water tank via the pressure of the stored pure water. The receiving material receiving container may be shaped like a cartridge, with such a configuration, the pure water piston side of the cartridge acts. Here the hydrostatic pressure in the pure water tank is used. Assuming that the pure water flows freely out of the pure water tank, with a suitable design of the flow-through cross sections, the throughput ratio between pure water and treatment material is approximately constant. Further alternatively, the container for the treatment material may also be a hydrostatic-pressure-compressible bellows or the like.

For an intimate mixture of pure water and treatment material, a static mixer is provided in a development of the subject invention. The concentration of treatment substances in the remineralized water is adjustable by means of a throttle.

It is also preferred that a venturi nozzle through which the pure water flows is provided in a discharge line for the pure water, via which the treatment substance is fed to the flowing pure water as a result of pressure difference. The pure water flows for this purpose preferably by a Drain line to a collection point or to a storage container for the remineralized pure water, in which drain line opens a supply line for the treatment material. In the connection area a differential pressure is reached, so for example by minimizing the cross section of the pure water leading drain line. Thus, it is further preferred that the treatment substance is supplied to the pure water by means of a Venturi nozzle penetrated by the pure water. Such a venturi nozzle has a cross-sectional constriction in the discharge line traversed by the pure water, in which cross-section narrowed region the feed line of the treatment material flows.

The treatment substance is in liquid form, alternatively in powdered form, further alternatively in pasty form or alternatively in granular form, wherein in a non-liquid form of the treatment substance this is adjusted so that a complete dissolution in the pure water is achieved.

The invention further relates to a device for generating pure water from raw water in the countercurrent principle, wherein the raw water is introduced from below and the condensate or pure water expires below.

Devices of the type in question are known. These generate pure water in particular by condensation from contaminated raw water, for which purpose the device can continue to work countercurrently. In this case, the raw water flows into the bottom of the device and is guided here vertically above to carry out the condensation. The resulting condensate or pure water is returned via a discharge line back to the bottom of the device for discharge via a discharge opening.

In view of the known prior art, a technical problem of the invention is seen in a device of the in question Type in particular with regard to achieve the purification of the condensate or pure water to further improve.

This problem is solved first and foremost by the subject matter of claim 12, wherein it is based on the fact that the generated pure water is passed through a trained as a riser filter chamber, which is filled with filter-active material. The filter space is preferably from below, d. H. more preferably flows on the bottom side, including an exemplary transmission line from the pure water outlet of the device is provided to the filter chamber in an exemplary embodiment. The condensate or pure water enters the bottom of the filter in the space and penetrates this in a further preferred embodiment in the vertical direction, wherein the filter chamber forms a riser. The flow of pure water through the filter chamber is achieved in a further preferred embodiment by introducing the pure water under pressure. This pressure can be built on the device side in the course of pure water production. The riser outlet of the filter chamber is arranged opposite the inlet, namely preferably on the ceiling side of the filter chamber, so that the entire, preferably hollow cylindrical designed filter chamber can be flowed through with pure water. The filter room is filled with filter-active material. This serves to bind volatile organic substances, which are in the

Vapor phase may have passed. Further, in particular with a filter-active bulk material, this is designed so that it also serves for cooling the condensate or the pure water passed through the filter chamber by convection.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 12 or with features of further claims. But you can also in an assignment to only individual features of claim 12 or the respective further claim or each independently of importance.

Thus, in an advantageous development of the subject invention, it is provided that the filter-active material is activated carbon, more particularly activated carbon. Activated carbon has a large internal surface and is therefore particularly suitable for the adsorption of volatile organic substances and also for cooling by convection.

In a preferred embodiment, it is provided that the riser outlet is connected to a pure water collecting container. The latter takes the guided through the activated carbon filter, cooled, and in particular freed of organic substances pure water. The collecting container is preferably positioned next to the filter chamber, this further optionally at the same height. It can be provided in this regard two separate device parts for forming the filter chamber and reservoir. Alternatively, there is also the possibility of combination, for example, by central arrangement of the riser-like filter chamber and a coaxial thereto outside the outside surrounding the filter chamber collecting container. The filter or filter chamber is a connecting element of two modules (sump and device).

The filling amount of filter material is between 0.5 to 1.5 liters, preferably one liter, more preferably the filter chamber has a height of 15 cm or more, more preferably about 20 cm. This results in connection with the preferred filling a slim, tubular configuration of the filter chamber, with a height corresponding to a multiple, for example, a 3- to 6-fold, further example 4 times the filter chamber diameter. The filter is used in a further development as a throttle unit for generating a necessary in the evaporator device overpressure.

The invention also relates to a device for producing pure water from raw water, wherein an evaporation of the pure water is provided and further wherein the evaporated pure water is first passed into a vapor space, from which it is sucked for compression and further heating.

Devices of the type in question are known. These are used for water purification, in particular drinking water purification, so on, as preferred in the present invention, for implementation in a portable device. Furthermore, stationary devices are also known in this regard. The purification of the raw water is carried out by evaporation, wherein with the interposition of a steam chamber downstream of the water vapor is sucked off for compression and further heating.

In view of the known prior art, the present invention has the problem of designing a device of the type in question functionally reliable.

This problem is solved, first and foremost, by the fact that the evaporated pure water is guided into the vapor space from an inflow opening via a collecting space and thereafter via a flow deterrent serving to separate the droplets. In the course of the evaporation process, liquid droplets are also entrained in the vapor stream. However, these still contain contaminated water, are correspondingly contaminated. Such drops of liquid are deposited via the droplet deposition flow chicanes, so that the compression and more Heating extracted steam flow maintains pure water quality. Larger drops of water up to due to insufficient heat, especially when starting the device liquid raw water passes before reaching the Strömungsschikane in the plenum, which also has a corresponding Abscheidefunktion. According to the proposed solution it is ensured that the guided out of the vapor space, in particular extracted vapor stream is free of raw water fractions. In this case, the flow baffle forms an acceleration section for the vapor stream, at whose baffle plates the liquid drops are separated off.

Further features of the invention are explained below, also in the description of the figures, often in their preferred assignment to the subject matter of claim 17 or to features of further claims. But they can also be in an assignment to only individual features of claim 17 or the respective further claim or each independently of importance.

In a preferred embodiment, the flow baffle extending above the bottom of the collecting space has a return to the collecting space. About this, the separated from the vapor stream liquid droplets are fed into the plenum, in which larger liquid droplets or raw water fractions are deposited due to their inertia against the vapor stream before reaching the Strömungsschikane. Accordingly, the collecting space is used for receiving unevaporated raw water or raw water fractions separated from the vapor stream. In this context, it is further preferred that the return with respect to a water level is sensor-monitored. This allows the device to be controlled or regulated. The water level in the area of the drop separator basically corresponds to the water / steam transition in the feed path to the steam trap. According to differences in pressure, there may be a level difference which is taken into account in the measurement.

To compress the evaporated pure water, a compressor is provided downstream of the steam space. This sucks for compression and further heating the pure water vapor from the steam room. In a preferred embodiment, the compressor is an electric motor-driven side channel compressor or a vapor compressor.

For the initiation of the cleaning process and the maintenance, taking into account a compensation of the heat loss, additional heat is supplied to the system. For this purpose, the collecting space, in particular on the bottom side, has an electrical resistance heating. The heating power is controlled in a further preferred embodiment depending on the prevailing Dm- cke and / or the temperature within the droplet. During the operation of the device, as a function of the abovementioned measured values, reheating of the liquid droplets separated, in particular from the vapor stream, and the raw water fractions likewise absorbed in the collecting space, so that they too can be supplied to the pure water vapor stream with evaporation, take place via the resistance heating. When starting the device, the resistance heater supports the acting on the raw water before entering the steam room heating process, especially when a heat exchanger is provided for heating the raw water.

The resistance heater in the collecting space is designed in a preferred embodiment for vaporizing small amounts of raw water, in particular in the form of liquid droplets. Occurs especially in the start-up process, according to still insufficient heating raw water in liquid form in the steam cavities, the raw water flowing into the collecting space after entry into the vapor space is discharged via a bottom-side lowest drain opening of the steam space, in particular the collecting space. To the drain opening provided in the lowest level of the steam space, a drain line is connected, which in a preferred embodiment of the subject invention supplies the raw water draining from the collecting space to the evaporation process again.

In a further preferred embodiment, the vapor space to an overflow - drain opening, which is arranged on a relative to the bottom of the plenum higher level. In the event of an accident, an outlet through which the water, in particular raw water, can leave the device in a controlled manner and thus can not reach areas of the steam space that are higher in level, is opened via this outlet opening, which in a further embodiment is valve-controlled. Thus, it is further provided that the overflow drain opening is arranged at a higher level relative to the bottom of the flow baffle, wherein further a suction opening of the compressor in the vapor space above the overflow opening and thus further above the bottom of the flow baffle is formed. As a result of the intended overflow outlet opening, in the case of an accident the rising water level does not reach the suction opening, thus counteracting damage to the compressor by suction of water. With regard to the overflow drain opening associated valve may be a float valve in the simplest form.

As a result of the above-described embodiment, a droplet deposition can be achieved in a compact design, wherein at the same time an indirect fill level monitoring and an accidental protection, further an integrated (additional) heating element is provided. The invention also relates to an electric motor arranged in a housing, which has a fan wheel for cooling.

Electric motors of the type in question are known. In order to carry away the engine heat generated during engine operation, these have a fan wheel, which is non-rotatably connected to the rotor shaft of the electric motor and thus rotates at rotor speed. Via the rotating fan wheel, an air flow is generated which is preferably guided in the shaft extension direction along the electric motor for cooling the same. This air flow guide is achieved by a housing pot comprising the electric motor, which leaves a gap, in particular an annular gap, between its inner wall and the outer wall of the electric motor. In this case, the air flows in through the fan impeller at one end of the housing pot and passes through in the region of the opposite end, possibly window-shaped openings provided on the housing pot side.

With regard to the prior art described above, a technical problem of the invention is seen in further improving an electric motor of the type in question, in particular with regard to the cooling thereof.

This problem is solved first and foremost by the subject matter of claim 26, with the object being that air heated by the electric motor is passed through an air / water heat exchanger by means of the fan wheel. As a result of this embodiment, the electric motor is improved with regard to its cooling or heat dissipation. The air flowing past the electric motor and in this case heated air is cooled by the air / water heat exchanger and sucked again to cool the electric motor via the fan. It is such an air flow circuit achieved at which always cool air is supplied to the electric motor. The heat exchanger is for this purpose for cooling the vorbeigeleiteten air flows through water, but possibly also other liquid heat transfer media.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 26 or with features of further claims. But they can also be in an assignment to only individual features of claim 26 or the respective further claim or each independently of importance.

For directed flow of the heated air at the heat exchanger surface, the heat exchanger is limited in the upper side by a arranged below the impeller flow baffle in a preferred embodiment. This is corresponding to the formation of a flow path spaced from the heat exchanger surface. On the underside, the heat exchanger is delimited by a housing bottom part, which forms a water flow space with an air / water separating part arranged above it. Accordingly flows below the air / water separator part, the cooling medium, preferably water, while the upper side of the separating part flows along the air to be cooled. The housing pot surrounding the electric motor is accordingly part of the heat exchanger, in particular in the region of the housing bottom part, by limiting a flow space for the cooling medium, but also in particular by the housing wall in the form of a flow restriction for the air to be cooled.

The cooling medium, in particular water, can flow in an undirected manner through the flow space formed between the housing bottom part and the air / water separator part. In this regard, however, a directed flow is preferred, for which purpose in the preferred embodiment in the water flow space, guide elements for directed flow of water are formed. These are formed in a further embodiment in the form of extending between the housing bottom part and separating part webs or wall sections, which are either integrally, further material of the same material with the housing bottom part or, as preferred, integrally formed of the same material with the separator. These vanes are more preferably oriented to provide a substantially spiral water flow, more preferably in the form that the flow is spirally outwardly from a central region. Alternatively, a meandering shape of the water flow in the plan view is possible. According to this embodiment, the flow around the surface is increased by the guide elements, in particular in one piece, uniform material configuration with the further preferably made of metal separating part. This leads to an improved heat transfer.

For favorable heat transfer, the air / water separator is a metallic part, more particularly consisting of a metal with a high heat transfer coefficient, which offers a favorable heat transfer due to the temperature difference between the heated air and the cooling medium, wherein the air is cooled and the water warmed up becomes.

In a further embodiment of the subject invention, it is provided that the air / water separator part merges sealed in the housing pot surrounding the electric motor. Correspondingly, the water flow space is preferably completely bounded on the upper side by the separating part, while on the underside and circumferentially on the wall side the flow space is limited by the housing pot. According to this embodiment, the air space of the housing pot accommodating the electric motor is hermetically separated from the flow space. In a further preferred embodiment, the air / water separating part has air-side guide elements directed radially on the air side. Along this flows the guided between separating part and Strömungsleitplatte heated air. In addition, an enlarged, air-side surface is created by the guide elements, which leads to an improved heat exchange.

The fan is arranged at an axial distance from the air / water separator, this more preferably surrounding or above the Strömungsleitplatte. For this purpose, in an advantageous embodiment, the flow baffle leaves a central flow opening to the fan wheel, according to which air is sucked out of the flow space formed between the baffle plate and the separator via the fan wheel through the central flow opening of the baffle plate. Here, cooled air is sucked in via the heat exchanger and fed to the electric motor.

A continuous air circulation is achieved by forming the Strömungsleitplatte with radial distance to the pot wall, leaving a flow opening. Correspondingly, as a result of the central suction via the fan wheel, the air heated on the electric motor is conveyed along the housing wall, passing through the plane of the flow guide plate in the flow space created between the flow guide plate and the separator part. In this case, for example, distributed over the circumference of the flow baffle several, possibly also different sized flow openings can be provided. Preferred is an embodiment in which the flow opening is formed over the entire circumference, so on, leaving an annular gap between the Strömungsleitplatten peripheral edge and the associated housing pot inner wall. In a further development of the subject invention it is provided that the electric motor is covered by a motor housing. Between the motor housing and the electric motor, the air flow is led to the removal of engine heat loss, this more preferably in the vertical direction, with further vertical alignment of the rotor shaft. The motor housing facing away from the air flow carried out to the fan motor wheel facing the motor housing end through openings. The heated air accordingly emerges from the motor housing into the air space between the motor housing and the housing pot surrounding the motor housing with the electric motor. A further improvement of the directed airflow along the

Electric motor is achieved in that the motor housing is the fan wheel connected to the central flow opening of the flow baffle. Accordingly, the cold air sucked in via the fan through the central flow opening of the flow guide plate is supplied in a targeted manner to the electric motor. The air can only emerge from the motor housing at the end of the electric motor.

The proposed electric motor may be arranged, for example, in a device for producing pure water from raw water, further in such a device with a compressor which is driven via the electric motor. The raw water to be cleaned is used in such an application with feeding into the device for cooling the above-described air flow by raw water is passed through the water flow space. Correspondingly, a cooling of the air flow dissipating the engine heat takes place via the heat exchanger, and at the same time a corresponding heating of the incoming raw water by heat transfer, whereby the raw water is at least preheated. The invention also relates to an apparatus for producing pure water from raw water, wherein an evaporation of the raw water is provided and the resulting vapor is passed in countercurrent to the raw water.

Devices of the type in question are known. These are used for water purification, in particular drinking water purification, so on, as preferred in the present invention, for implementation in a portable device. Furthermore, stationary devices are also known in this regard. The purification of the raw water is carried out by evaporation, wherein the resulting steam is directed against the raw water supply.

In view of the above-described prior art, a technical problem of the invention is seen in further improving a device of the type in question.

The problem is solved first and foremost by the subject matter of claim 42, wherein it is based on the fact that an electric motor operated steam compressor is provided and that the electric motor is arranged inside with respect to the surrounding running raw water / steam paths. As a result of this arrangement, the vapor compressor and this make up

Compressor driving electric motor a central assembly around which the raw water and steam paths are arranged. Accordingly, in particular, the heat emitted during operation of the electric motor can be used in particular to support the evaporation process. By means of the steam compressor, the steam produced during the process is compressed. This leads in particular to an overheating and saturation of the compressed steam to a temperature between 140 ° C and 200 ° C, preferably between 160 ° C and 180 ° C, which is further in terms of disinfection of the pure water proves to be beneficial. Further, the flow of pure water through the compressor is impressed.

Further features of the invention are explained below, also in the figure-description, often in their preferred association with the subject of claim 42 or to features of further claims. But they can also be in an assignment to only individual features of claim 42 or the respective further claim or each independently of importance.

Thus, it is provided in a development of the subject invention that the electric motor is disposed within a double-walled pot, the raw water / steam paths in the wall space. As a result, at the same time an effective sound attenuation for the encapsulated in the double-walled pot arranged electric motor is given. In addition, an air-moisture barrier is achieved. The electric motor is placed in the moisture-proof interior of the device. The humidity range is provided in the wall space between the pots, which serves both the transport of the raw water to be purified and the countercurrent transport of pure water vapor. In addition, this makes a compact design achievable.

In a preferred embodiment, the vapor compressor is disposed above the electric motor, more preferably in axial alignment of the shaft driven by the electric motor. The electric motor is preferably also a reluctance motor, whose motor electronics, which are further preferably provided, are also arranged in the housing pot at the same time. The vapor compressor is more preferably a side channel compressor, further a vapor compressor. The fan impeller of the preferred side channel compressor can be driven via the shaft of the electric motor.

Pot bottom side, an air / water heat exchanger is formed. About this heat exchanger can be used via a built-up in the interior of the pot air circulation heat generated during operation of the electric motor for heating or warming up the raw water, which further also at the same time a cooling of the electric motor is achieved. The air circulation is preferably achieved by a fan wheel that can be driven by the motor shaft. The heat exchanger forms the bottom end of the housing pot accommodating the electric motor and the vapor compressor. On the upper side of the steam compressor, a steam space is provided, which closes the housing pot on the ceiling side. The vapor space communicates fluidly with both the tube waterway and the vapor compressor

Clean waterway. For particular the electric motor receiving housing pot interior of the vapor space is hermetically sealed. The vapor space is upstream of the steam compressor in terms of flow. The latter sucks in the operation of the vapor space, the resulting vapor for compression of the same.

The bottom of the steam space can be heated at least partially independently of the vapor compressor. By means of this heating, evaporation of liquid droplets optionally deposited in the vapor space is possible. Furthermore, the heating provided in the vapor space, in particular during the start-up process of the device, serves to sufficiently heat the raw water initially entering the vapor space to the vaporization temperature. The heating can be permanently activated. However, in this regard, a case-related activation of the separate heating is preferred, for example in US Pat Dependence on the course of the process and, if appropriate, as a function of a determined moisture deposition quantity.

In a preferred embodiment, the untreated water / steam paths formed in the wall space are helical, so that, taking into account a compact design of the device, a sufficient length of the paths is given, which length requires for the evaporation process, but also for the condensation process of the pure water becomes. The raw water / steam ways here can be rectified or alternatively also run in opposite directions helical. Preference is given to an embodiment in which the compressed steam is guided within a conduit which is surrounded by the raw water or the resulting steam in front of the vapor compressor. The line carrying the condensing steam or the condensed pure water is hermetically sealed against the surrounding, the raw water or the resulting vapor leading Wandungszwischenraum. According to this arrangement, a heat exchanger is realized. The heat of the superheated, compressed steam is transferred to the raw water passing by for evaporation thereof. At the same time the compressed steam is cooled due to the heat exchange, for condensation in pure water. In a preferred embodiment, the generated steam simultaneously entrains liquid in the area of an outlet turn of the reversible ice, which leads to improved heat transfer in this area. Likewise, disperse solids are entrained and discharged. Furthermore, the helix forming an outer tube for the raw water is preferably made from a polymer material (for example temperature-resistant plastic or silicone hose), which contributes to a significant reduction of heat losses and, moreover, proves to be low in weight. The line carrying the compressed steam or the pure water is preferably a thin-walled, more preferably flexible metal hose. Alternatively, the heat exchanger may also be constructed as a "hose-in-hose construction", for example formed from an inner metal hose which is surrounded by a plastic hose, for example silicone hose.

In a further preferred embodiment, the steam space has areas of different heights, in particular different vertical heights. These areas of different heights are arranged and designed such that the incoming steam generated by the raw water drip-free the

Steam room is passed through to the vapor compressor. Thus, the raw water or the steam resulting from the raw water first flows into a collecting space of the steam space which has a lower floor in relation to the inlet. Any liquid components entrained in the vapor stream are separated in the collecting space and collected on the bottom side of the collecting space or discharged therefrom. In this context, it proves to be advantageous if the collecting space is electrically heatable, in particular on the bottom side independently of the compressor. In this regard, a surface heating is preferably provided, so on, in particular in the form of an electrical resistance heater. About this are entrained via the vapor stream and collected in the plenum liquid portions, but possibly also incoming raw water at the beginning of the process heated to evaporation temperature, which also such liquid content in the vapor space can be supplied to the further evaporation process.

Raw water droplets entrained in the vapor stream must be eliminated in order to extract pure water. For this purpose, the opening into the vapor space suction port of the vapor compressor over to the plenum spaced a droplet deposition Strömungsschikane. This flow baffle reliably separates drop-shaped raw water fractions from the vapor stream, so that only pure water vapor is sucked in by the compressor. The flow baffle acts in the manner of an acceleration section, wherein the entrained liquid drops are separated at the baffles of the flow baffle. In a further preferred embodiment, the flow baffle running above the bottom of the collecting space has a return to the collecting space via which separated liquid droplets are returned and vaporized via the electrical heating provided on the bottom side in the collecting space and re-supplied to the further cleaning process. Alternatively or in combination, the separated liquid drops can also run off via the collecting space and be fed again to the evaporation process.

The invention further relates to a process for the production of pure water from raw water, wherein the raw water is evaporated and the steam is passed in countercurrent to the incoming raw water and thereby condensed.

In order to further improve a method of the type in question, it is proposed that the steam is superheated before the countercurrent flow by means of a Seitenka- nalverdichters. According to this embodiment, a further disinfection of the water to be purified, here the steam is achieved. In addition, according to the overheating of the steam, the heating of the raw water to evaporation temperature countercurrent in the form of a heat exchange process can be achieved. As a result of the heat exchange, the raw water to be purified via the superheated steam to evaporation temperature heated and at the same time the pure water steam cooled heat exchange, for condensation in pure water.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 57 or on features of further claims. But they can also be in an assignment to only individual features of claim 57 or the respective further claim or each independently of importance.

During the ongoing process, the raw water is heated by the action of heat via the compressed and thus superheated steam. To start the device, an electrical resistance heater is provided in this context, which initially evaporates the raw water. This electrical resistance heating can also serve as part of the process for heating deposited raw water from the steam stream.

In a preferred embodiment of the proposed method, the flow of steam takes place from top to bottom and the raw water from bottom to top. Accordingly, the raw water is preferably supplied to the bottom side of a device and evaporated in the course of the flow to vertically above, further on the head side of the device, a vapor space is provided, which also represents a reversal point of the flow paths. From the steam room, the steam is sucked in via the side channel compressor and thereafter guided countercurrently to the raw water in the direction of the device bottom. Accordingly, inflow and outflow of raw water and pure water can be arranged approximately in a plane, possibly further adjacent to the bottom side of the device. Non-evaporated raw water shares are returned in a preferred embodiment for re-enforcement of the raw water. Such untreated water fractions can be liquid droplets entrained in the current process with the vapor stream and are deposited before they reach the compressor. In addition, in particular in the course of the startup of the device not enough heated raw water fractions are recycled for re-applying heat until they reach this evaporation temperature.

The side channel compressor is controlled by means of a

/ Steam driven inboard motor. This is preferably an electric motor, more preferably a reluctance motor. This is carried out encapsulated such that a hermetic separation is achieved to the raw water / steam due.

The vapor space into which the vapor is introduced is further preferably formed above the side channel compressor, wherein further the vapor is sucked from the vapor space through the side channel compressor. As a result of the overpressure achieved by the compression, the steam flows in countercurrent to the raw water downwards. Accordingly, the flow direction is impressed on the steam by the side channel compressor.

In order to continue to offer while maintaining a compact design of the device of the evaporation or condensation serving long ways, it is further provided that the raw water / steam paths are formed like a helix. These are preferably provided within a wall space of a double-walled pot surrounding the electric motor and more preferably the side channel compressor, wherein further the compressed steam is guided after the compressor within a conduit which is surrounded by the raw water or resulting vapor or is wetted by this.

The compressed vapor is more preferably superheated to a temperature between 140 ° C and 200 ° C, preferably between 160 ° C to 180 ° C. As a result, a disinfection is ensured and at the same time the necessary overpressure to the directional flow of the compressed steam is reached.

In a further preferred embodiment of the method, the heating is carried out via the separate resistance heating in accordance with a water level in the steam room. The heating power of the resistance heater is regulated in dependence on a determined pressure or a determined temperature in the vapor space.

The invention also relates to a seal on a shaft which can drive a fan impeller of a side channel compressor between the fan impeller and an electric motor driving the fan impeller.

In the case of electric motor-driven fan impellers for side channel compressors, the problem arises, in particular when compressing gaseous media condensable at ambient temperature, such as water vapor, that the medium possibly leaking from the side channel compressor in the region of the shaft through the shaft reaches the electric motor, if appropriate in condensed form Form, for example, in the case of compressed water vapor in the form of water, which can lead to malfunctioning to short circuits within the electric motor.

In view of the problem described above, the object of the invention is to provide a seal of the type in question, the reliable sig prevents the entry of emerging from the side channel compressor on the shaft compression medium into the driving electric motor.

This problem is solved first and foremost by the subject matter of claim 66, wherein it is based on the fact that starting from the fan impeller in the direction of the electric motor, first an annular gap seal and a centrifugal cutting disc connected to the shaft and / or an overpressure barrier are provided. As a result of this configuration, the passage of compression medium emerging from the side channel compressor via the shaft into the electric motor is reliably prevented. The annular gap seal is positioned around the shaft between the impeller and the centrifugal cutting disc. During operation, a pressure difference prevails between the electric motor and the fan impeller of the side channel compressor, so that in the case of a possible leakage, the escaping medium can flow along the shaft in the direction of the electric motor without separate measures. The at a high speed, for example, 15000 to 40,000 rpm., Further, for example, 25,000 to 30,000, in particular 28,000 U / min. rotating shaft, as well as the external conditions such as upcoming temperatures, which can reach 100 ° C and more, for example 150 ° C, continue the usually comparatively low starting torque of the electric motor exclude the arrangement of a contacting shaft seal. The proposed sealing concept is based on the theory of decreasing leakage currents at reduced flow cross-sections, for example very narrow gaps. At the shaft such narrow gaps are created by the intended annular gap seal, which minimizes the leakage flow at a given pressure difference. Furthermore, the leakage flow, which optionally passes through the upstream annular gap seal, is conveyed radially outward into a circumferential area of the chamber comprising the cutting disk by means of the centrifugal cutting disc rotating with shaft rotational speed and thus reliably removed from the downstream electric motor. held. Alternatively or in combination with this, an overpressure barrier is provided in the region downstream of the annular gap seal, which generates an overpressure acting against the leakage flow for the purpose of restraining leakage flows.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 66 or with features of further claims. But they can also be in an assignment to only individual features of claim 66 or the respective further claim or each independently of importance.

Thus, it is provided in a preferred embodiment that the cutting disc is connected media-tight with the shaft. Correspondingly, possible leakage currents can not pass between the separating disk and the shaft in the direction of the electric motor. Rather, they are reliably transported radially outwards by the cutting disk rotating at shaft speed.

In a further preferred embodiment, it is provided that the overpressure or the overpressure barrier is generated by an airflow generated by the shaft rotation. According to this embodiment, in addition to the radial conveying effect, the overpressure barrier is built up by means of the centrifugal cutting disk rotating at shaft speed. In this context, it is provided in a further preferred embodiment that the air flow is generated by a blade-like structuring of the cutting disc. This blade-like structuring is furthermore preferably associated with only one flat side of the cutting disk, for example by arranging corresponding guide vanes, or alternatively by working out such guide vanes from the massive cutting disk material. The cutting disk consists here in further zugter embodiment of a plastic material, further made of a hard plastic material, alternatively of a metallic material, further wherein the diameter of the cutting disc corresponds to a 1.5 to 5 times, more preferably a 3.6 times the shaft diameter.

The vanes or the blade-like structuring is further preferably formed on the engine side, d. H. further on the side of the cutting disc facing away from the annular gap seal, wherein further the surface of the cutting disc facing the annular gap seal is flat.

To dispose of any leaking through the annular gap seal leakage flows through the centrifugal cutting disc of this or the separation disc receiving chamber is assigned a radially adjacent drainage channel, in which provides the cutting disc. This drainage channel is led to the outside outside the range of the electric motor. On the drainage channel can be further connected to the leakage safely laxative line or the like ..

Gaseous leaks, such as water vapor, are first removed via the drainage channel. In order to safely remove even liquid leaks, such as water, the drainage channel is at least partially filled with a capillary-promoting medium. In a preferred embodiment, this capillary-promoting medium is a felt insert integrated in the drainage channel, via which liquid leaks separated by means of capillary transport via the centrifugal cutting disk are passed through the drainage channel to the outside.

In addition, it is proposed that a clearance remains between an outer edge of the centrifugal cutting disc and the capillary conveying medium, the First, the free, low-friction rotation of the centrifugal cutting disc allows. In addition, this gives a radial spin clearance.

In a development of the subject invention, two annular gap seals are axially provided with each other, wherein between the annular gap seals the centrifugal cutting disc is arranged.

According to the proposed solution, comparatively narrow gaps are generated on the shaft, which generally minimize the leakage current for a given pressure difference. Preferably, two such annular gap seals are provided which are aligned with the shaft. Between these seals is a chamber with approximate ambient pressure, in which the centrifugal disc rotates at shaft speed. Due to the application of the centrifugal disc, a pressure profile is generated within the chamber in the direction of fan impeller. Leakages that enter the chamber through the annular gap seal arranged between the blower impeller and the centrifugal disk are thus conveyed radially outward into the chamber circumference and, in the case of vaporous leakage, are discharged via the outlet. Liquid leakage is transported through the additionally provided capillary-promoting medium with wick-like effect in the outlet. By arranging a wick-like medium, it is also possible to remove leaks, which are below a certain level.

The annular gap seals are more preferably designed in a sliding bearing material. The proposed seal can be used for example in an electric motor / compressor assembly application, which arrangement is part of a device for producing pure water from raw water.

The specified numerical bandwidths also include all intermediate values, if not already indicated by way of example, in particular in 1/10 steps, further in 1/10 steps from the lower and / or upper limit to the other Limitation limited. "And" stands for the fact that both borders are shifted to one or more tenths towards the border, that is, limited.

The invention is explained in more detail below with reference to the accompanying drawing, which illustrates only exemplary embodiments. It shows:

Figure 1 is a perspective view of an apparatus for producing pure water from raw water with an arranged filter device and a collecting container.

FIG. 2 shows the device in an exploded view; FIG.

Fig. 3 is a plan view of the device after removal of a lid with a view of a vapor space;

Fig. 4 is a further plan view of the device after acceptance of the

Steam room section facing a side channel compressor; 5 shows a vertical section through the device along the line VV in Fig. 4.

6 shows the horizontal section along the line VI-VI in Fig. 5.

Figure 7 is a horizontal section along the line VII-VII in Fig. 5.

8 shows the horizontal section along the line VIII-VIII in Fig. 5.

9 is a perspective, partially broken view of the side tenkanalverdichters with arranged electric motor and associated flow baffle.

10 shows the steam room section in a single representation, the plan view view;

Figure 11 shows the steam room section in bottom view.

12 shows the vapor space section in a partially broken perspective view;

FIG. 13 is a schematic sectional view for explaining the formation of different headspace levels; FIG.

FIG. 14 shows the section according to the line XIV-XIV in FIG. 5; FIG.

Fig. 15 is an enlarged cross-sectional view concerning the enforcement area of the motor shaft in the side channel compressor; FIG. 16 shows the section according to the line XVI-XVI in FIG. 15; FIG.

17 shows the vertical section through the filter device with associated water cleaning device;

FIG. 18 is a schematic illustration of a method and apparatus for remineralizing pure water relating to a first embodiment; FIG.

Fig. 19 is a schematic representation of the method and an apparatus for remineralization of pure water, a second embodiment concerning.

Shown and described is first with reference to FIGS. 1 and 2 a

Device 1 for the production of pure water from raw water. This device 1 is further associated with a filter device 2 and a pure water collecting container 3.

The device 1 initially has a double-walled housing pot 4. With a total of non-round, round-extended plan view of the housing pot 4, the outer wall 5 cup-shaped, integrally formed with a housing bottom part 6. In the transition region of the outer wall 5 in the housing bottom 6 an inwardly facing, circumferential step 7 is formed. On this pot inside sits, the inner wall 8 of the double-walled housing pot 4 ausformendes insert part 9 sealingly. The insert part 9 is in plan, leaving a between inner wall 8 and outer wall 5 leaving, circumferential wall space 10 adapted to the floor plan of the outer wall. 5

The step 7 facing away from the end portion of the insert part 9 has a directed towards the outside in the direction of the outer wall 5 collar 11 which sits on a step-like portion 12 with the interposition of a seal 13 sealingly on a likewise outwardly facing support collar 14 of the outer wall 5 (see Fig.5).

According to this embodiment, the wall gap 10 is closed by the collar 11 to vertically above. After vertical down is a conclusion by the sealing interaction of housing bottom side step 7 and inner wall 8 given.

On the outer side of the inner wall 8 is a wall gap 10 crossing, further wall inside of the outer wall 5 adjacent, helically around the inner wall 8 extending spiral collar 15 is formed. This forms correspondingly in the wall space 10 to a vertically upwardly extending around the insert part 9 helical path 16, the free cross-sectional area widens upwards in a preferred embodiment.

The insert part 9 is pot-like shape with an upward, ie in the direction of the collar 11 having the end facing opening. The pot bottom of the insert part 9 is formed by an air / water separator part 17. This is preferably a metallic part, further formed for example in the form of an aluminum bottom plate. The separating part 17 is sealingly with which the inner wall 8 forming insert part wall connected, such as glued or welded.

Upper side, d. H. facing away from the housing bottom 6, the air / water separator 17 has radially directed air guide elements 18. These are integral with the separating part 17, further formed web-shaped, whereby an enlargement of the separating part surface is reached.

As a result of the step 7 provided on the housing bottom side, the air / water separating part 17 is vertically spaced from the housing bottom 6, which runs essentially parallel to the separating part.

Taking into account the intended seal between insert 9 and thus air / water separator part 17 and housing bottom side stage 7, a water flow space 19 is created by this arrangement between the separator 17 and the housing bottom 6. In this water flow space 19 protrudes on the underside of the separator 17 of the same material, integrally molded guide element 20, which faces away from the separator 17 on the surface side of the housing base 6 is supported. The guide element 20 extends approximately starting from a geometric center of the partition member 17 in plan view in a spiral shape, so on about the formation of two spiral turns. The central Spiralweg- start is positioned in overlap to a marginal edge of a housing earth-side raw water inlet opening 21. The latter is laterally removed from the bottom of the housing 6 via a feed line 22. Due to the design of the guide element 20 is also associated with the water flow chamber 19, an enlargement of the separator surface reached. The air / water separator part 17 also has an outlet opening 23 which is open towards the inner pot of the insert part 9. A portion of the separator surface is inclined towards the outlet opening 23.

On the underside of the separating part 17, the outlet opening 23 goes over into an outlet pipe 25 passing through the water flow chamber 19 and the housing bottom 6 in the region of a correspondingly positioned opening 24. To seal the perforated opening 24, an annular seal 26 is provided.

The outlet port 25 is provided with an external thread, which protrudes freely on the underside of the housing bottom 6, via which external thread with appropriate Schaubzuordnung a nut or the like. Via the outlet port 25, the determination of the insert part 9 in the device 1, taking into account the described seals is.

Approximately opposite to the opening 24 in the housing bottom 6, which is penetrated by the outlet port 25, a horizontally directed, transversely extending connecting path 27 is formed in the region of the step 7 formed between the outer wall 5 and the housing bottom 6, which connects the air / water separator 17 to the housing bottom 6 formed water flow space 19 connects with the formed in the wall space 10 helical path 16. The connection path 27 is further assigned to the spiral end of the underside of the separating part 17 spirally applied guide element 20th

The in the vertical direction about five turns extending helical path 16 opens into a trained in the collar 11 of the insert part 9 and corresponding horizontally oriented helical-path opening 28th On the double-walled housing pot 4 sits a housing pot 4 upwards concluding steam chamber section 29. This is, as in the following, the housing pot 4 and the insert 9 made as a plastic injection molded part.

The steam space section 29 initially has a horizontally oriented steam space ceiling 30, which is vertically spaced in the assignment position to the upper end of the housing pot 4 forming collar 11. The vapor space portion 29 further comprises a circumferential, vertically oriented wall 31, which in assignment position, the upper end of the Housing pot 4 encloses, wherein further the vapor space portion 29 is supported on the step-like portion 12 of the insert side collar 11.

This support takes place in the region of one of the steam room ceiling 30 sealingly associated, at the same time the wall 31 forming pot portion 32, which is formed vertically downwards, in particular associated with the interior of the housing pot 4 closed. The thereby essentially by the steam room ceiling 30, the wall 31 and the steam room floor 33 completed space forms a vapor space 34.

This vapor space 34 is first associated with an inflow opening 35 extending in a vertical plane. This is positioned immediately below the steam room ceiling 30, further in association with the helical path opening 28th

The inflow opening 35 opens into a collecting space 36 of the vapor space 34. This collecting space 36 has the largest cross-sectional area compared to other sections of the vapor space 34. Further defines the collection space 36 with the vapor space bottom 33 the vertically lowest region of the vapor space 34th

In the collecting chamber 36 associated portion of the vapor space bottom 33, an electrical resistance heater 37 is inserted. This is a plate-shaped figure with a circular floor plan.

The collecting space 36 almost crossing a flow baffle 38 is formed. This is essentially formed from two, substantially parallel, mutually parallel, vertically oriented baffle walls 39, which extend from the vapor space bottom 33, starting at the bottom side against the steam space ceiling 30. The baffles 39 are further arranged in a plan view in approximately S-shaped, one end of the baffles 39 open freely in the collecting space 36.

The flow baffle 38 is provided with a horizontally oriented bottom 40 which extends above the vapor space bottom 33, but below the lowest level of the inlet opening 35.

The flow baffle 38 leads away from the collecting space 36 to a suction opening 41. This is horizontally aligned with a circular cross-section, wherein further the suction opening 41 is planarly positioned approximately at the level of the inflow opening 35. Accordingly, the suction opening 41 is vertically spaced above the baffle floor 40.

The flow baffle 38 is provided in the region of a rectilinear middle section connecting the S walls with an elongated, funnel-shaped drop collection chamber 42, which is designed essentially as a depression of the bottom 40. This extends from the ground level of the streams mungsschikane 38, starting from the level of the vapor space bottom 33, further on the bottom side of the collection chamber 42 a slot-shaped passage opening 43 is provided to the collection chamber 36, for returning any liquid deposited by the flow baffle 38 and in the collection chamber 42 liquid drop into the plenum 36th

The collecting space 36 extends while maintaining the bottom level, the free end portion of the flow baffle 38 encompassing a drain collection area 44. End side, further considered in a projection of the suction port 41 on the steam room floor 33 adjacent, but spaced from the suction port 41 is the steam space bottom 33 in the drain collection area 44 penetrated by a Tiefstablauföffnung 45th

The drainage collecting area 44 merges into a floor-level higher overflow area 46 with end-overflow drainage opening 47. This and the floor of the overflow area 46 are arranged at a higher level than the floor level of the collecting space 36 and the flow chicane 38, but at a vertically lower level as the suction port 41.

The overflow region 46, in particular the overflow drain opening 47 forming region of the cup part 32 protrudes, as well as the nevertheless the overflow area 46 overlapping steam room ceiling 30 laterally cantilevered over the housing pot 4 addition.

On the underside of the suction opening 41 associated bottom portion of the

Cup part 32 is a pipe connection part 48 is fixed, for example screw-mounted. This protrudes in accordance with the selected arrangement in the closed from the steam chamber section 29 housing space 49 and receives one end of a steam supply line 50. Furthermore, the deepest drain opening 45 of the collecting space 36 merges into a downwardly extending downwardly through the housing interior 49 downpipe 51, which is formed of the same material, in one piece with the steam space section 29 or with its steam space bottom 33. The free end of the downpipe 51 engages sealingly in an inner side of the inner wall 8 integrally formed base 52, which has a transverse return path 53 and thus forms a transverse deflection of the downpipe 51. The return path 53 opens, the inner wall 8 passing through in the helix away 16, further approximately at the height of a viewed from the housing bottom 6 from the second helix weg- turn.

In the housing interior 49, a vapor he is arranged dichter- / electric motor unit hanging. The determination is made on the underside of the steam room floor 33 by particular screwing the steam compressor. This is designed as a side channel compressor 54 in the illustrated embodiment.

The side channel compressor 54 has, in the usual form, a compressor housing composed of a cover 55 and a compressor bottom 56. Between the cover 55 and the compressor bottom 56, a blower impeller 57 is rotatably arranged about a vertical axis x, which blower impeller 57, facing the compressor base 56, carries blower vanes 58. Associated with this, the compressor bottom 56 forms a blower duct 59, which extends approximately 300 ° to 330 ° in plan view. Each end of the fan duct 59, a radial inlet 60 and a radial outlet 61 is assigned.

In the inlet 60, the discharged from the steam chamber 34 steam supply line 50 opens. The outlet 61 of the side channel compressor 54 merges into a steam discharge line 62, which leads the housing interior 49 across a pipe connection part 63 to the winding end of the helical path 16 formed in the wall gap 11 and thus continues to enter the helix path 16 directly below the helical path opening 28 ,

The pipe connection part 63 passes in the helical path 16 sealingly into a conduit 64 which is arranged in the helical path 16 and the insert part 9 circumferentially extending in a winding manner vertically downwards in the direction of the housing bottom 6. The pipe 64 in this case consists of a vapor-tight, good heat-transferring material, for example formed as a flexible metal hose.

The free, lower end of the pipe 64 is adjacent to the formed between the water flow chamber 19 and helical path 16 connecting path 27 sealingly connected to the housing bottom 6 passing through pure water outlet opening 65, to the outside of the housing a pipe connection piece 66 connects.

The side channel compressor 54 or its blower impeller 57 can be driven by an electric motor 67. This is accommodated in a motor housing 68 leaving an annular space on the inside of the motor 67, which motor housing 68 is fastened to the side channel compressor 54 on the underside. The arrangement of the electric motor 67 in the motor housing 68 and together with this in the housing pot 4 a good noise attenuation is achieved.

The electric motor 67 is designed as a reluctance motor, wherein the rotor, not shown, rotatably with a vertically along the axis of rotation x ausge- directed shaft 69 is connected. This shaft 69 engages, the cover 78 of the motor housing 68 and the compressor base 56 interspersed positively in the Gebläselaufrad 57, for rotational transmission of the rotor rotation on the Gebläselaufrad 57th

The side channel compressor 54 facing away from the end of the shaft 69 projects beyond the electric motor 67 and rotatably carries a further housed inside the motor housing 68 fan 70. The latter carries the underside vanes, which causes a given direction of rotation of the shaft 69 a suction air flow from bottom to top.

In the region of the end facing away from the side channel compressor 54, the motor housing 68 carries a flow guide plate 71 aligned parallel to the air / water separation part 17 and vertically spaced therefrom. This is adapted to the cross section of the housing interior 49 on the level of the flow guide plate 71 in plan in that a flow opening 72 results circumferentially between the edge of the flow guide plate and the inner wall surface of the inner wall 8.

The flow guide plate 71 is further provided with a central circular opening in the form of a circular flow opening 73, which is approximately adapted in diameter to the free cross section of the motor housing 68.

The fan 70 is positioned in a plane above the central flow opening 73.

Between Strömungsleitplatte 71 and air / water separator part 17 results in a substantially horizontally oriented air flow path 74th The housing bottom 6 forms, together with the air / water separator part 17, also in connection with the flow guide plate 71, an air / water heat exchanger 75.

As can be seen from the detailed sectional illustration in FIG. 15, immediately below the blower impeller 57, assigned to the compressor base 56, there is provided an annular gap seal 76 comprising the shaft 69. This is aligned with the shaft 69 and forms a wall outside through ring-collar-like projections a labyrinth. In this section, the annular gap seal 76 is held by a retaining element 77 which is inserted in a rotationally fixed manner in the compressor base 56.

The annular gap seal 76 extends vertically downwards into the region of the motor housing cover 78 of the electric motor 67. Underneath the annular gap seal 76, the shaft 69 carries a centrifugal cutting disc 79 which is arranged non-rotatably on it. In the exemplary embodiment shown this has a diameter , which corresponds to about 2 times the shaft diameter.

The centrifugal cutting disc 79 is connected to the shaft 69 media-tight, wherein further the centrifugal cutting disc 79 on the annular gap seal 76 applied surface has a blade-like structuring 80, which at shaft rotation in which the centrifugal cutting disc 79 comprehensive annular space 81 one of the generated Air flow derived pressure builds up.

The annular space 81 merges into a radially outwardly drained drainage channel 82. This is at least partially filled with a capillary conveying medium 83, wherein further between the peripheral edge of the cutting disc 79 and the medium 83 within the annular space 81, a free space 84 remains. In operation, the shaft rotation and the concomitant air flow generated by the centrifugal cutting disc 79 are conveyed radially outwards via the drainage channel 82, in particular vapor-like leaks. Liquid leaks are additionally conveyed out via the drainage channel 82 through the medium 83, which in the illustrated embodiment is a felt insert.

On the underside of the centrifugal cutting disc 79, a second annular gap seal 85 is further provided inside the motor housing cover 78.

Because of the rotational speed, a pressure profile acting in the direction of the side channel compressor 54 is generated by the blade-like structuring 80 of the centrifugal cutting disc 79.

The centrifugal separator disk 79 formed as a radial fan generates between the gap end between the shaft 69 and the annular gap seal 76 and the separating disk 79 receiving chamber between the annular gap seals 76 and 85, a pressure drop, which is so dimensioned that against the pressure between the two annular gap seals 76th and 85 sets a volume flow from the electric motor 67 between shaft 69 and gap seal. This volume flow as well as the possible leakage flow are conducted via the drainage channel 82 to the outside.

The annular, wick-like medium 83, which leads with an extension into the drainage channel 82, absorbs in particular at standstill of the compressor condensing water vapor and promotes this by capillary action to the outside. The extension of the medium 83 is dimensioned so that it extends deeper to a level than the lowest arranged component between see the seals 76 and 85 corresponds. This ensures that surplus liquid escapes to the outside when the medium 83 is full and additional liquid is taken up.

In a preferred embodiment, the annular gap seals 76 and 85 are formed of plain bearings, which are more preferably glued.

The drainage channel 82 passes on the outside of the motor housing 68 into a disposal line 86. This end is connected to a Abtropföff- 87, which is formed in the over the motor housing 68 projecting annular region of the flow baffle 71. Via this opening 67, any leakage separated via the drainage channel 82 drips off onto the air / water separator, in order to be led out through its outlet opening 23 and the outlet connection 25.

The filter device 2 is arranged adjacent to the device 1, furthermore has a height adapted to the vertical height of the device 1. The filter device 2 is tubular in shape with a vertically aligned tube axis. On the bottom side of the filter tube wall 88, a bottom 89 is provided. The cover-side conclusion forms a filter tube cover 90th

From the pure water outlet opening 65 and the subsequent pipe connection piece 66, a connecting line 91 passes into the filter device 2, opens here directly above the bottom 69th

The filter device 2 is formed as a riser, correspondingly has a diameter which corresponds to about one fifth of the device height in the illustrated embodiment, so at an exemplary height of about 200 mm, a diameter of about 40 mm. In the formed filter chamber 92 activated carbon 93 is filled as bulk material. The filling amount of the activated carbon 93 in the illustrated embodiment is about one liter.

Immediately below the filter tube cover 90, a radially outwardly guided riser outlet 94 is formed, which is connected to the cup-shaped pure water collecting container 3.

As can be seen in particular from the illustration in FIG. 2, the pure water collecting container 3 can be closed by a cover 95.

The recovery of pure water from raw water by means of the device 1 described above is carried out by supplying raw water through the housing base side arranged inlet line 22, after which the raw water is passed spirally in the water flow space 19 to the outside via the connection path 27 in the helical path 16.

The waste heat of the electric motor 67 generated during operation of the device 1 is transported via the air flow generated by the driven fan wheel 70, the air sucked in via the central flow opening 73 of the flow guide plate 71 and through the gap between the electric motor 67 and the motor housing 68 with flow around of the electric motor 67 is initially directed vertically upward in the direction of the motor housing cover 78. By openings provided in the cover 96 96 enters the waste heat of the electric motor 67 transporting air flow into the housing interior 49 and passes through the circulation generated by the fan 70 in the flow between the flow plate 71 and air / water separator part 17 formed air flow path 74. Over the formed air / water Heat exchanger 75, the air heat is transferred to the flowing into the water flow space 19 raw water, for preheating thereof and for cooling the continuously circulating air, which hereafter via the central flow opening 72 again cooling air is supplied to the electric motor 67.

The electric motor 67 is accommodated in a closed system according to the described arrangement, whereby the sound power is minimized. The in the wall space 10 the electric motor 67 quasi surrounding raw and pure water here serves as additional sound insulation.

The thus preheated raw water flows around in the wall space 10, the helical path 16 passing through the insert part 9, wherein the raw water evaporates according to the heat exchanger process described in more detail below and enters via the helical path opening 28 into the vapor space 34.

The steam, passing through the collecting space 36, passes to the suction opening 41, an acceleration being achieved further by suction of the steam by means of the side channel compressor 54 via the suction opening 41. Accordingly, in the leading to the intake 41 flow baffle 38 on the baffles 39 optionally entrained in the vapor stream liquid droplets are deposited, which are recycled via the drop collection chamber 42 and the bottom opening 43 in the plenum 36th

An unillustrated, arranged in the drop collection chamber 42 sensor here monitors the water level in the collection chamber 42, which results in the sensor conclusions about the level of the entire device 1, due to the correlation between the level of the device and level of the collection chamber 42nd The vapor sucked in via the suction opening 41 into the side channel compressor 54 is compressed in the compressor and briefly overheated to a temperature of, for example, 170 ° C., which contributes to further disinfection.

The superheated steam enters via the steam discharge line 62 in the metal tube or in the tube performance 64, wherein the pressure due to the steam directed against the flow direction of the raw water in the helical path 16, namely from top to bottom. In the raw water vapor path 97 formed in the wall space 10, according to this arrangement, a heat exchanger is formed. The overheated steam flowing in the pipe 64 heats the raw water flowing around the pipe 64 on the outside of the wall and wetting the pipe 64 to the evaporation temperature, while the steam in the pipe 64 cools and finally condenses.

Due to the geometric arrangement, a so-called plug flow is established. In this case, liquid is entrained during evaporation in the coil, which ensures an improved heat transfer at the pipe 64 in the upper region of the heat exchanger. In addition, by the surge-like flow form disperse solids, such as precipitates, entrained in the heat exchanger unit and discharged.

The condensed pure water passes through the pure water outlet opening 65 and the connecting line 91 in the filter device 2, in which the pure water is like a tube from bottom to top, the activated carbon 93 is flow around umströmend to finally taken over the Steinrohrausitt 94 into the pure water reservoir 3 become. In the filter device 2 are volatile organic substances, which has gone into the vapor phase are bound to the activated carbon. In addition, in this case also a cooling of the flowing pure water is achieved.

Heat can be added to the system to initiate the process and maintain it at the expense of heat loss. For this purpose, arranged in the collecting space 36 bottom side resistance heater 37 is provided. The heating power of the resistance heater 37 is regulated as a function of the pressure or the temperature within the vapor space 34.

About the resistance heater 37 is initially carried out optionally a supporting heat application of the entering into the steam chamber 34 steam. In particular, in the process start, in which for the heat exchanger function within the Rohwasser- / Dampfweges 97 still no sufficient steam heat available, attacks the resistance heater 37. The over the helical path 16 in the steam room 34 entering, in the start-up process still in liquid form present raw water falls Exit from the helical path opening 28 into the plenum 36 and is there vaporized via the resistance heater 37, which steam is sucked through the flow baffle 38 and the suction port 41 from the side channel compressor 54. If the steam heating capacity after the side channel compressor 54 is sufficient for heating the raw water within the helical path 16, the resistance heater 37 can be switched off.

In addition, liquid droplets which have been deposited and returned to the collecting space 36 within the flow baffle 38 are also vaporized via the resistance heater 37.

Larger, entering the plenum 36 raw water quantities, for example, in the process startup, are preheated via the resistance heater 37 via the Tiefstablauföffnung 45 and the subsequent downpipe 51 is fed back into the helical path 16, for the same throughput again, until the evaporation temperature is reached.

The overflow drain opening 47 of the steam space 34 is provided with a valve, not shown, for example float valve, which releases the drain opening 47, provided that a raw water level present in the collecting space 36 reaches the level of the overflow area 46. Thus, an accident is counteracted. Due to the fact that the floor level of the overflow area 46 is below the level of the suction opening 41 for the lateral channel compressor 54, suction of, in particular, raw water via the side channel compressor 54 is reliably prevented.

FIG. 18 shows a method and a device 1 for the ready-to-drink preparation of demineralized pure water 102, which is stored in a pure water tank 103.

In the pure water tank 103 at the same time a pressurisable container 104 is added. This has, for example, a compressible Weichwan- fertil. Alternatively, the container 104 may also have a piston displaceable by pressurization or the like.

The container 104 holds conditioning materials 105 in the form of minerals and / or flavorings. These are supplied with the aid of the proposed device and the proposed method, the pure water 102 for ready-to-drink processing and corresponding remineralization of the pure water 102. The pure water 102 flows through a drain line 106, preferably after opening a corresponding valve, not shown, from the pure water tank 103, a static mixer 107 interspersed. In this mixer 107 emanating from the container 104 feed line 108. About this feed line 108 is the mixer 107 and supplied to this the pure water 102 treatment substances 105.

The output of treatment substances 105 from the container 104 into the feed line 108 and thus also into the pure water 102 flowing through the mixer 107 depends on the pressure P acting on the container 104. For this purpose, the hydrostatic pressure of the container 104 in the pure water tank 103 surrounding pure water 102 used.

The pure water 102, which is remineralized by mixing in treatment substances 105 in the mixer 107, is further led via the drainage line 106 to a drinking water removal point 109, alternatively to a fresh water tank.

FIG. 19 shows a second embodiment of the method and the device 1. Here, the demineralized pure water 102 from the pure water tank 103 by means of a pump, preferably electric pump 110, pressed by a Venturi nozzle 111. Due to an accelerated flow in the interior of the Venturi nozzle 111, the static pressure is reduced, so that via the incoming laterally into the Venturi nozzle 111 inlet line 108, the treatment substances 105 are sucked out of the container 104.

The mixing of pure water 102 and treatment substances 105 takes place within the Venturi nozzle 111. The inflow of treatment substances 105 and thus the mixing ratio can be controlled via a throttle 112 in the supply line 108 between Venturi nozzle 111 and container 104.

The pressure difference at the Venturi nozzle 111 is at a required throughput of 2 l / min, approximately 1 bar.

All disclosed features are essential to the invention. The disclosure content of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

LIST OF REFERENCE NUMBERS

1 device

2 filter device 3 pure water collecting container

4 housing pot

5 outer wall

6 caseback

7 step 8 inner wall

9 insert part

10 wall space

11 collar

12 Stepped section 13 Seal

14 support collar

15 spiral collar

16 Wendel away

17 Air / water separator 18 Air vanes

19 water flow space

20 guide element

21 raw water inlet opening

22 Inlet line 23 Outlet opening

24 opening

25 outlet nozzles

26 ring seal

27 connection path 28 Wendelweg opening

29 steam room section

30 steam room lid

31 wall 32 pot part

33 steam room floor

34 steam room

35 inlet opening

36 collecting space 37 resistance heating

38 flow chicanes

39 baffle

40 floor

41 suction opening 42 drop collecting chamber

43 opening

44 drain collection area

45 Tiefstablauföffnung

46 Overflow area 47 Overflow drain opening

48 pipe connection part

49 housing interior

50 steam supply line

51 downpipe 52 base

53 return path

54 side channel blower

55 Lid

56 compacting floor 57 Fan impeller

58 fan blades

59 blower duct

60 inlet 61 outlet

62 steam discharge line

63 pipe connection part

64 pipeline

65 Pure water outlet opening 66 Pipe connecting piece

67 electric motor

68 motor housing

69 wave

70 impeller 71 flow guide plate

72 flow opening

73 Central flow opening

74 air flow path

75 Air / water heat exchanger 76 Annular gap seal

77 holding element

78 Motor housing cover

79 Centrifugal cutting disc

80 structuring 81 annulus

82 drainage channel

83 medium

84 free space

85 Annular gap seal 86 disposal line

87 drip opening

88 filter tube wall

89 bottom 90 filter tube cover

91 connection line

92 filter room

93 activated carbon

94 Riser outlet 95 Cover

96 openings

97 raw water / steam away

102 pure water

103 pure water tank 104 containers

105 processing substances

106 Drain line

107 mixers

108 Supply line 109 Fresh water withdrawal point

110 pump

111 venturi nozzle

112 throttle

P pressure x rotation axis

Claims

1. A process for ready-to-drink treatment of demineralized pure water (102) in a device (1), in particular of pure water (102) prepared from raw water, wherein the pure water (102) treatment substances (105) such as minerals and / or flavorings are added, characterized in that, by way of the pressure (P) of the pure water (102), even the treatment substance (105) is introduced into the flowing pure water (102).

2. The method according to claim 1 or in particular according thereto, characterized in that the treatment material (105) by means of differential pressure to the pure water (102) is supplied.

3. The method according to one or more of the preceding claims or in particular according thereto, characterized in that the treatment material (105) by means of a clean water (102) interspersed Venturi nozzle (111) is supplied to the pure water (102).

4. Device (1) for ready-to-drink treatment of demineralized pure water (102), in particular of pure water (102) produced from raw water, the pure water (102) conditioning substances (105) such as minerals and / or flavor substances are zusetzbar indicates that the treatment substance (105) is added to the pure water (102) via the pressure (P) of the pure water (102).

5. Apparatus according to claim 4 or in particular according thereto, characterized in that the treatment substance (105) in a container (104) is received and that the container (104) in a pure water tank (103) arranged on the pressure (P) of the stored pure water is pressurized.

6. Device according to one or more of claims 4 to 5 or in particular according thereto, characterized in that for supplying the treatment substance (105) is interposed a static mixer (107).

7. The device according to one or more of claims 4 to 6 or in particular according thereto, characterized in that in a drain line (106) for the pure water (102) from the pure water (102) through-flowed Venturi nozzle (111) is provided, via which the treatment material (105) is supplied to the flowing pure water (102) as a result of pressure difference.

8. Device according to one or more of claims 4 to 7 or in particular according thereto, characterized in that the treatment substance (105) is in liquid form.

9. Device according to one or more of claims 4 to 8 or in particular according thereto, characterized in that the treatment substance (105) is present in powdery form.

10. The device according to one or more of claims 4 to 9 or in particular according thereto, characterized in that the treatment substance (105) is present in pasty form.

11. The device according to one or more of claims 4 to 10 or in particular according thereto, characterized in that the processing material (105) is present in granular form.

12. Device (1) for producing pure water from raw water in the countercurrent principle, wherein the raw water is introduced from below and the condensate or the pure water flows down below, characterized in that the pure water produced by a trained as a riser filter chamber (92) which is filled with filter-active material.

13. The apparatus of claim 12 or in particular according thereto, characterized in that the filter-active material is activated carbon (93).

14. The device according to one or more of claims 12 to 13 or in particular according thereto, characterized in that the riser outlet (94) is connected to a pure water collecting container (3).

15. The device according to one or more of claims 12 to 14 or in particular according thereto, characterized in that the filling quantity

Filter material between 0.5 to 1.5 liters, preferably 1 liter.

16. The device according to one or more of claims 12 to 15 or in particular according thereto, characterized in that the filter chamber (92) has a height of 15 cm or more.

17. Device (1) for the production of pure water from raw water, wherein an evaporation of the pure water is provided and further wherein the evaporated pure water first passed into a vapor space (34) is, from which it is sucked for compression and further heating, characterized in that the evaporated pure water in the vapor space (34) from an inflow opening (35) via a collecting space (36) and hereafter via a droplet separation serving flow baffle (38) is.

18. The apparatus of claim 17 or in particular according thereto, characterized in that above the bottom (33) of the collecting space (36) extending flow baffle (38) has a return to the collecting space (36).

19. Device according to one or more of claims 17 to 18 or in particular according thereto, characterized in that the return is sensor-monitored with respect to a water level.

20. The device according to one or more of claims 17 to 19 or in particular according thereto, characterized in that for compressing the evaporated pure water the vapor space (34) downstream of a compressor (54) is provided.

21. Device according to one or more of claims 17 to 20 or in particular according thereto, characterized in that the collecting space

(36) in particular on the bottom side an electrical resistance heater

(37).

22. The device according to one or more of claims 17 to 21 or in particular according thereto, characterized in that the vapor space (34) has a bottom-side Tiefst- drain opening (45).

23. The device according to one or more of claims 17 to 22 or in particular according thereto, characterized in that the vapor space (34) has an overflow-drain opening (47) on a relative to the bottom (33) of the collecting space (36) higher level is arranged.

24. The device according to one or more of claims 17 to 23 or in particular according thereto, characterized in that the overflow drain opening (47) is arranged at a higher level relative to the bottom (40) of the flow baffle (38).

25. Device according to one or more of claims 17 to 24 or in particular according thereto, characterized in that a suction opening (41) of the compressor (54) in the vapor space (34) above the overflow drain opening (47) is formed.

26. In a housing pot (4) arranged electric motor (67) having a fan for cooling (70), characterized in that by means of the fan wheel (70) through the electric motor (67) heated air through an air / water heat exchanger (75) is headed.

27. Electric motor according to claim 26 or in particular according thereto, characterized in that the heat exchanger (75) on the upper side by a below the fan wheel (70) arranged Strömungsleitplatte (71) is limited.

28. Electric motor according to one or more of claims 26 to 27 or in particular according thereto, characterized in that the heat exchanger (75) is bounded on the underside by a housing bottom part, with an air / water separation part (17) arranged above forms a water flow space (19).

29. Electric motor according to one or more of claims 26 to 28 or in particular according thereto, characterized in that in the water flow space (19) guide elements (20) are formed for the directed flow of water.

30. Electric motor according to one or more of claims 26 to 29 or in particular according thereto, characterized in that the water flow is substantially spiral.

31. Electric motor according to one or more of claims 26 to 30 or in particular according thereto, characterized in that the flow is guided from a central region to the outside.

32. Electric motor according to one or more of claims 26 to 31 or in particular according thereto, characterized in that the air

/ Water separator (17) is a metallic part.

33. Electric motor according to one or more of claims 26 to 32 or in particular according thereto, characterized in that the air

/ Water separator (17) in the, surrounding the electric motor (67) surrounding the housing pot (4).

34. Electric motor according to one or more of claims 26 to 33 or in particular according thereto, characterized in that the air

/ Water separator (17) air-side radially directed guide elements (18) having.

35. Electric motor according to one or more of claims 26 to 34 or in particular according thereto, characterized in that the fan wheel (70) is arranged at an axial distance from the air / water separator part (17).

36. Electric motor according to one or more of claims 26 to 35 or in particular according thereto, characterized in that the fan wheel (70) is arranged surrounding or above the flow guide plate (71).

37. Electric motor according to one or more of claims 26 to 36 or in particular according thereto, characterized in that the flow guide plate (71) leaves a central flow opening (73) to the fan wheel (70).

38. Electric motor according to one or more of claims 26 to 37 or in particular according thereto, characterized in that the flow-guiding plate (71) is formed at a radial distance from the pot wall with engagement of a flow opening (72).

39. Electric motor according to one or more of claims 26 to 38 or in particular according thereto, characterized in that the flow opening (72) is formed over the entire circumference.

40. Electric motor according to one or more of claims 26 to 39 or in particular according thereto, characterized in that the electric motor (67) by a motor housing (68) is included.

41. Electric motor according to one or more of claims 26 to 40 or in particular according thereto, characterized in that the motor housing (61) the fan wheel (70) is connected to the central flow opening (72) of the Strömungsleitplatte (71).

42. Device (1) for the production of pure water from raw water, wherein an evaporation of the raw water is provided and the resulting vapor is passed in countercurrent to the raw water, characterized in that an electromotively operated steam compressor ter is provided and that the electric motor ( 67) inside with respect to the surrounding running raw water / steam paths (97) is arranged.

43. Apparatus according to claim 43 or in particular according thereto, characterized in that the electric motor (67) is arranged within a double-walled pot (4), the raw water / steam paths

(97) run in the wall space (10).

44. Device according to one or more of claims 42 to 43 or in particular according thereto, characterized in that the vapor compressor is arranged above the electric motor (67).

45. The device according to one or more of claims 42 to 44 or in particular according thereto, characterized in that the vapor compressor is a side channel compressor (54).

46. The device according to one or more of claims 42 to 45 or in particular according thereto, characterized in that pot bottom side an air / water heat exchanger (75) is formed.

47. Device according to one or more of claims 42 to 46 or in particular according thereto, characterized in that a vapor space (34) is provided on the upper side of the vapor compressor.

48. The device according to one or more of claims 42 to 47 or in particular according thereto, characterized in that the bottom (33) of the vapor space (34) is at least partially heatable independently of the vapor compressor.

49. The device according to one or more of claims 42 to 48 or in particular according thereto, characterized in that in the wall space (10) helically extending raw water / steam paths (97) are formed.

50. The device according to one or more of claims 42 to 49 or in particular according thereto, characterized in that the compressed vapor is guided within a conduit (64) which is surrounded by the raw water or resulting vapor.

51. Device according to one or more of claims 42 to 50 or in particular according thereto, characterized in that the vapor space (34) has regions of different heights.

52. The device according to one or more of claims 42 to 51 or in particular according thereto, characterized in that the raw water or the resulting steam first flows into a, opposite the inlet height lower ground having collecting space (36) of the vapor space (34).

53. The device according to one or more of claims 42 to 52 or in particular according thereto, characterized in that the collecting space (36) is electrically heatable, in particular on the bottom side independently of the compressor.

54. Apparatus according to one or more of claims 42 to 53 or in particular according thereto, characterized in that the suction opening (41) of the vapor compressor opening into the vapor space (34) leads to the collecting space (36) via a flow baffle (38 ) is spaced.

55. Device according to one or more of claims 42 to 54 or in particular according thereto, characterized in that the above the bottom of the collecting space (36) extending flow baffle (38) to the suction port (41) has a return to the collecting space (36).

56. A process for the production of pure water from raw water, wherein the raw water is evaporated and the steam is passed in countercurrent to the inflowing raw water and thereby also condensed, characterized in that the steam before the countercurrent leadership by means of a side channel compressor (54) is superheated ,

57. The method according to claim 56 or in particular according thereto, character- ized in that the raw water for starting the device (1) via an electrical resistance heater (37) is evaporated.

58. The method according to one or more of claims 56 to 57 or in particular according thereto, characterized in that the flow of Steam is carried from top to bottom and the raw water from bottom to top.

59. The method according to one or more of claims 56 to 58 or in particular characterized in that unevaporated raw water fractions are returned for re-enforcement of the raw water path.

60. The method according to one or more of claims 56 to 59 or in particular according thereto, characterized in that the side channel compressor (54) by means of a relative to the raw water / steam paths (97) is arranged inside engine.

61. The method according to one or more of claims 56 to 60 or in particular according thereto, characterized in that the steam is passed into a above the side channel compressor (54) formed steam space (34) and is sucked from there through the side channel compressor (54).

62. The method according to one or more of claims 56 to 61 or in particular according thereto, characterized in that the compressed steam flows in accordance with the overpressure in countercurrent to the raw water downwards.

63. The method according to one or more of claims 56 to 62 or in particular according thereto, characterized in that the raw water / steam paths (97) are formed like a helix.

64. The method according to one or more of claims 56 to 63 or in particular according thereto, characterized in that the compressed steam is superheated to a temperature between 140 ° C and 200 ° C, preferably between 160 ° C and 180 ° C.

65. The method according to one or more of claims 56 to 64 or in particular according thereto, characterized in that the heating Ü about the separate resistance heater (37) in accordance with a water level in the vapor space (34) is made.

66. Sealing on a fan impeller (57) of a side channel compressor (54) drivable shaft (69) between the fan impeller (57) and a Gebläselaufrad (57) driving the electric motor (67), characterized in that starting from the Gebläselaufrad ( 57) in the direction of the electric motor (67), first an annular gap seal (76) and a shaft (69) connected to the centrifugal separation disc (79) and / or an overpressure barrier is provided.

67. Sealing according to claim 66 or in particular according thereto, characterized in that the cutting disc (79) is connected to the shaft (69) media-tight.

68. Sealing according to one or more of claims 66 to 67 or in particular according thereto, characterized in that the overpressure is generated by a, generated by the rotation of the shaft air flow.

69. Sealing according to one or more of claims 66 to 68 or in particular according thereto, characterized in that the air flow is produced by a blade-like structuring (80) of the cutting disc (79).

70. Sealing according to one or more of claims 66 to 69 or in particular according thereto, characterized in that the structuring

(80) motor side of the cutting disc (79) is formed.

71. Sealing according to one or more of claims 66 to 70 or in particular according thereto, characterized in that the cutting disc (79) in a radially subsequent drainage channel (82) supplies.

72. Sealing according to one or more of claims 66 to 71 or in particular according thereto, characterized in that the drainage channel (82) is at least partially filled with a capillary conveying medium (83).

73. Sealing according to one or more of claims 66 to 72 or in particular according thereto, characterized in that between an outer edge of the cutting disc (79) and the capillary promotional medium (83) remains a free space (84).

74. Sealing according to one or more of claims 66 to 73 or in particular according thereto, characterized in that two annular gap seals (76, 85) are provided axially with each other.