WO2014071536A1

WO2014071536A1 - Adjustable countercurrent system

Info

Publication number: WO2014071536A1
Application number: PCT/CH2013/000197
Authority: WO
Inventors: Peter A. Mueller; Sandro MÜLLER
Original assignee: Mueller Peter A; Müller Sandro
Priority date: 2012-11-12
Filing date: 2013-11-12
Publication date: 2014-05-15
Also published as: EP2941305A1

Abstract

The invention relates to a countercurrent system (1) which is a horizontal axial turbomachine. The housing (6) can be adjusted vertically by means of the guide pipe (5) and the pipe guide (17) and horizontally by means of the rail guide (22), and the housing can be inclined by means of rotating means. The housing (6) is adjusted together with the propeller (8), the drive motor (9), and the Kort nozzle (7), which interact in the housing. Additionally, the display and control panel (14), the light projector (18), the extendable and foldable nozzle cover (12), and a float (25) are located on the housing (6). When the countercurrent system (1) is not in use, the system is used as a filter and water quality system comprising a filter (33) and a metering system (34).

Description

Adjustable counter current system

Technical area

The invention relates to a countercurrent system with an axial flow machine in a swimming pool, in which the entire turbomachine is adjustable in height, extendable or tiltable and optionally has a Kortdüse, according to the preamble of the first claim.

Background Art Countercurrent systems have been in use for decades, especially in smaller swimming pools, so that they can swim long distances without the swimmer having to turn around after a few meters by swimming in place against an artificially generated stream of water. Such systems have been known since the 1960's, as described, inter alia. in the patent US 4,001, 899 or DE 2259343 and have the property that the pressure pump for generating the water flow comes from a pump, which is located outside the swimming pool. In the meantime, suspended countercurrent systems are also available on the swimming pool, which have an intake and exhaust tract in the water and the pump and the pump motor are installed above the waterline. These systems usually use centrifugal pumps to generate the appropriate pressure for the countercurrent system.

A square countercurrent system in the water of the swimming pool with the motor above the waterline, the battery at the pool edge is described in the patent US Pat. No. 6,789,278, B2, another version with the propeller in a tunnel in the patent FR 2886662, a height-adjustable countercurrent system in the patent US Pat. No. 5,597,288.

A countercurrent system with a curved underwater pipe which is adjustable in height to the pelvic floor is described in the utility model DE 83 1 1 105 U1. Presentation of the invention

The invention relates to a countercurrent system with an axial flow machine in a swimming pool, with height-adjustable, horizontally displaceable and tiltable flow drive for sports, fun, rehabilitation or wellness, according to the preamble of the first claim.

Private swimming pools are usually not very large, so it is advantageous to install a counter-current system in order to be able to swim longer distances and not have to constantly make turning maneuvers. Public swimming pools are so heavily used at certain hours of the day that corresponding swimming distances can not be carried out in peace and thus counter-current systems can provide their services there in an advantageous manner.

Today's countercurrent systems are complex in terms of obstructing the system with separate shaft construction outside the swimming pool and wall openings for the inlet and outlet of the water flow, with the exception of countercurrent systems, which can be suspended at the edge of the pool. Common to almost all is that they use a centrifugal pump and the water flow never runs straight, but in long pipes and several

Deflections are guided around. The longer the pipes have to be from the suction point to the pump and from there back to the exit point and the more deflections have to be laid, the lower the efficiency of the system, i. only by the friction in the pipes, the efficiency loss can be over 50%. The loss must therefore be compensated by a stronger pump system.

The inventive solution is to have the water flow by means of a submerged under the waterline Strömungsmaschiene, in particular a propeller in a rigid housing with a comprehensive safety net, softer is surrounded by a thrust Kortdüse and thus has the lowest possible flow friction and improved efficiency simultaneously in the inlet.

The drive motor is located in a carrier gondola in which the drive motor is installed. Between the propeller and drive motor, a reduction gear can be placed. The propeller is connected directly or indirectly to the drive motor at the same shaft height. The drive motor is cooled by the surrounding water in the pool or the water-resistant drive motor is held inside for cooling in corresponding water or oil. The shaft seal corresponds to that of outboard motors or sterndrives in watercraft. With a slight overpressure in the gondola, in addition to a good shaft seal, no swimming pool water can safely enter the drive motor.

Furthermore, the countercurrent system has a height adjustment of the water outlet and can thus be optimally adapted to the various sports activities such. B. for the float the water jet precisely below a certain height in the water

Or the countercurrent system can be raised to the surface of the water, as a fluid for surfing with the surfboard attached to the edge of the pool or for canoeing or other recreational activities

Competitive sports activities.

When not in use, the housing rests compactly with the integrated propeller and drive motor directly on the wall of the swimming pool and is led away horizontally if necessary from the wall of the swimming pool to allow a correspondingly efficient water supply to the propeller.

The countercurrent system can also be adjusted in inclination to adjust the water jet at an angle, because the combination of flow angle and flow position relative to the waterline in the pool creates only the ideal flow for the swimmer or the respective sports activity.

For this purpose, an indicator can be ideally attached to the countercurrent system, which displays on a display above the waterline the desired information regarding the activity with actual / target comparisons and other more, or the data are projected by laser or beamer on the pool bottom. Furthermore, by means of a video camera and an image-processing controller, the float can be measured with respect to distance to the countercurrent system and the distance by means of regulation and control of the speed of the propeller, the float can be kept in a specific position window. If the countercurrent system is also to be used as a massage or wellness system, then a cover with nozzle elements can be attached to the flow outlet part in order, for example, to mount a massage tube on it or by introducing air

To produce sparkling water or to adjust the nozzle position from a wide to a narrow stream of water, details that are not shown here, since these Functions correspond to the state of the art. Also not shown is the attachment of one or more underwater lights on the countercurrent system.

If the countercurrent system is not used as a swimming or entertainment device, this can also serve to clean the pool by a filter in front of or behind the propeller is attached, which absorbs impurities from the pool and retains, as well as that in the water flow of the countercurrent system Injector can be attached to a dosing, which emits appropriate chemical agents when needed and this leads directly into the propeller flow and thus the water is mixed as best as possible. An automatic tilt adjustment on the countercurrent system leads to an even better mixing of the water by not only circulating the flow on a given horizontal level, but by means of the tilt adjustment, an additional water circulation in the pool takes place. The further advantage of such axial flow machine with its economical and safety-relevant housing 6 is the ease of maintenance also with respect to

Wintering and this the water is drained in the pool, as it does not require separate water drains or other actions. According to the invention, this is achieved by the features of the first claim.

The core of the invention is, by means of a fully submerged countercurrent system consisting of a housing with mesh cover, a drive motor drives a propeller in a Kortdüse and the countercurrent system is height adjustable, horizontally displaceable and tiltable, and the drive motor space is cooled with air or corresponding liquid and with it If necessary, an overpressure can be produced for a corresponding liquid. The

Countercurrent system optionally has an image-processing sensor and a light projector, as well as a disinfection system. Further advantageous embodiments of the invention will become apparent from the dependent claims. Brief description of the drawings

In the following, embodiments of the invention will be explained in more detail with reference to the drawings. The same elements are provided in the various figures with the same reference numerals.

Show it:

Fig. 1 is a schematic side view of a countercurrent system in a swimming pool with a connected to the wall mount height and horizontally adjustable housing with a fixed therein propeller with his

Drive motor and the housing a guide rail with a

sliding nozzle cover has, as well as a fold-out display panel with control panel

Fig. 2 is a schematic front view of a countercurrent system in a swimming pool with a connected to the wall mount height and horizontally adjustable housing with a moored propeller, the drive motor and the housing a guide rail with a movable and hinged by means of hinges and lockable nozzle cover

Fig. 3 is a schematic side view of a countercurrent system in a swimming pool with a mounted on the wall bracket guide tube on which a height and longitudinally adjustable housing is mounted and in the guide tube is a gas spring with a blocking device

Fig. 4 is a schematic side view of a countercurrent system in a swimming pool with a mounted on the wall bracket guide tube to which a height and längsverstellbares housing is attached and on the guide tube and the housing of the countercurrent system is a working cylinder with a blocking device and a filter acts in front of the propeller and a metering system with injector is located on the wall of the swimming pool. Way to carry out the invention

Fig. 1 shows a schematic side view of a countercurrent system 1 in one

Swimming pool 2 with a mounted on the pool wall 3 wall mount 4, a guide tube 5 and a pipe guide 17 for height adjustment of

The housing 6 is tilted by means of the pivot bearing 1 1 and the inclination plate 13. In the housing 6 is the carrier gondola 10, in which the drive motor. 9 located and connected to the propeller 8. On the housing 6, a fold-out display and control panel 14 is attached, as well as a battery 31. The housing 6 has on the sides of a network 15 and a flow straightener 16 and an image sensor 18th

Nowadays, ground-level swimming pools 2 are mostly fitted with countercurrent systems which require a pool wall breakthrough, since the entire pump unit with drive motor and electrical system is located in a separate shaft outside the swimming pool 2.

Easier to do this are hook-on countercurrent systems, which are attached to the pool edge 3a, but are also inefficient due to the long tubes or tunnels of the water supply.

Another problem is the position of the nozzle for the water jet below the waterline WL. These values are given in the swimming pool market with "approx." Values, since the waterline WL can be filled to the correct height when filling the pool 2 - if it really does - but by splashing and evaporating water, the waterline WL over time logically All these factors lead to an impairment of the optimal use of the countercurrent system, especially in the case of swimming pool users who want to use the system for more than just a swim training, such as for a surf and canoe training use.

The inventive solution is to use an axial flow machine as a countercurrent system 1, without any curved inlet and outlet pipes or other tunnel guides in front of or behind the propeller 8 to use in order to keep the flow losses of the water to an absolute minimum, also a propeller. 8 which is driven directly by the drive motor 9, because mechanical Deflections also lead to performance losses, and that the propeller optionally rotates in a Kortdüse 7 and thus provides additional thrust.

The Kortdüse 7 is a ring which conical, i. is tapered on the outflow side, has a wing profile and the propeller blade tip has only a small gap to the casing, so that a higher mass flow is generated.

The drive motor 9 may be an electric motor or a hydraulic drive motor and the rotational speed of the drive motor 9 may be adjusted continuously at any time, in particular be limited by means of pulse width modulation and the maximum speed.

Also can be installed in the housing 6 instead of a large diameter propeller 8, two smaller propeller 8. These can also be at a defined angle to each other, so not necessarily parallel, so that the propeller flow P as little as possible overlap or so that can form a quietest possible flow.

Furthermore, it is central that the level of the propeller flow P is adjustable below the waterline WL, as well as the inclination T of the propeller flow P, in order to cope with various uses:

be it for beginners swimmers so that the water flow flows practically under the body and at the same time provides a lot of buoyancy, the competitive athlete who wishes swimming conditions as in the competition pool, i. that the water flows to him at the optimal, realistic height or the surfer, who wants to have the water flow as high as possible, to allow his surfboard the maximum buoyancy at the highest flow rate.

The adjustment of the inclination of the propeller flow P serves, e.g. in swim mode, to prevent water splash or "bow wave" from the waterline WL, with the propeller 8 remaining fully immersed to generate no propeller ventilation, along with the speed of the propulsion engine 9 which produces a corresponding propeller flow P velocity and in

Interaction between lifting height H and slope T of the propeller 8, so that an optimal flow can be generated to match the swimming style of the float. By means of the guide tube 5 and the pipe guide 17, on which the housing 6 is located with the propeller 8 mounted therein, the desired parameters can be set very precisely. The Hubsperre 12 ensures that the desired hub remains blocked. The upper and lower pipe guides 17 are connected together with the opposite pipe guide 17 by means of the connecting plate 26 to which the buoyant body 25 is attached. By means of the buoyant body 25, the float in the water can accomplish the adjustment of the stroke H of the housing 6 easier. The buoyant body 25 is a lightweight plastic element in the form of a hollow body or filled with a closed-cell foam or a gas spring or a mechanical spring or a counterweight with deflection roller and the like. The inclination T of the propeller flow P is effected by the tilt adjuster 13, consisting of the rotary wheel 13a and the spindle 13b and spindle nut 13c, and the pivot bearing 11. By turning the rotary wheel 13a, the inclination of the housing 6 can be adjusted and thus the angle of the propeller 8. The rotary wheel 13a has an adjustment lock or the spindle 13b is self-locking, so that a successful position of the inclination T is maintained.

At the inlet sides E a net 15 is stretched, so that no objects from the area swimming pool 2 or limbs of floats can get into the propeller 8 and on the opposite side, the outlet side A, is the flow straightener 16, which has the task of water swirl to calm the propeller 8 and is also secured with a network 15, so that certainly no objects can get into the propeller 8 into it. The housing 6 has a carrier nacelle 10, which can provide by their shape already for a calming of the water flow S and holds inside the drive motor 9 in position, as well as a hollow bore, so that therein

Electric cable or the hydraulic line can be performed. The

Carrier nacelle 10 is connected at least to the upper part of the housing, wherein the upper part is advantageously designed as antiventilation plate 6a, ie thus can be drawn from above no air in the propeller 8 and also serves as a lid or plate for other technical means such as a battery 31 or a display and control panel 14. On the top of the housing 6 is the fold-out display and control panel 14, which in the unfolded position, the swimmer in his training to provide the desired information. When the countercurrent system 1 is not in use, the fold-out display and control panel 14 is closed and in the "off mode" the display shows, for example, the water temperature or the pH value of the water From the edge of the pool 3a, the values can be read comfortably The display with the information values can be operated further in "off mode" by means of solar cells. The rotation of the display by means of a gyro chip for position determination in space, this can thus the position of the display and

Recognize control panel 14 and be controlled by the software accordingly. The operator panel may have piezo probes 14a, i. the piezotastor 14a produces current due to the manual compression of piezoelectric elements when pressing a button to execute a corresponding signal and thus provides the signal output to the controller 36, if necessary, also by radio forth.

By means of an electrically operated propeller 8, the countercurrent system 1 can also be connected to a battery 31, i. operate a rechargeable battery. The battery 31 is inserted into a corresponding recess in the housing 6 and by means of a waterproof cable or by means of inductive power supply with the

Drive motor 9 and the display and control panel 14 connected. A second battery 31 can be charged and stored in the home at a charging station and if necessary, the two batteries 31 are exchanged, so that the countercurrent system 1 always has power available.

At the bottom of the housing 6 is an image sensor 18, which detects the float and measures the distance between the float and the image sensor and according to a control algorithm, the float by means of speed variation of the drive motor 9 leads to a reference point.

Not shown here is a vibration damper, which receives vibrations of the drive motor 9 or the propeller 8. A measurement label, similar to a customs staff, which can be attached to the foldable display and Bedienientafei 14, so that in a simple way to verify the depth of the housing 6, as well as the speed protection on the drive motor 8, in the case of the propeller gets too little water, due to a too high extension of the countercurrent system 1 from the pool 2, and thus the drive motor 9 would pass, hereby the speed protection engages immediately. The height adjustment H can also be done by means of a parallelogram, which also involves a displacement of the housing 6 to the pool wall 3.

The inclination T can be done instead of the tilt adjuster 13 by means of adjustable flow straighteners 16, although less efficient, but in sporadic

Use of the countercurrent system 1 but of good use. Also, a flap

40 as shown in Figure 4 instead of the flow straightener 16 are attached to the housing 6.

By means of the height-adjustable countercurrent system 1, a swimming pool cover without cut-outs can also be designed and thus very easily over the

Countercurrent system 1 are drawn.

Fig. 2 shows a schematic side view of a countercurrent system 1 in one

Swimming pool 2 with a mounted on the pool wall 3 wall mount 4 with a guide tube 5 and a pipe guide 17 for height adjustment of the housing 6 and a rail guide 22, consisting of the rail 22a and the slide 22b, for horizontal displacement of the housing 6. In the housing 6 the carrier nacelle 10, in which the drive motor 9 is located and connected to the propeller 8. The housing 6 has a fold-out display and control panel 14 and on the sides of a network 15, as well as a light projector 23rd

The housing 6 has a longitudinally displaceable rail guide 22, consisting of the rail 22a and carriage 22b, wherein a part of the carriage 22b is connected to the vertical pipe guide 17, which engages in the guide tube 5. Thus, the housing 6 with the propeller 8 and mounted therein

Drive motor 9, according to arrow H, are adjusted in the stroke H and thus take the desired depth of water. Not shown here, the housing 6 can also be inclined by this having a pivot bearing and a tilt divider with an angle lock, as described in Fig. 1. The housing 6 can be moved horizontally, this is why, when not in use, the housing. 6 to park elegantly and space-savingly on the pool wall 3 and, when using the countercurrent system 1, pull out the housing 6, so that behind the

Housing 6 ample space for an optimal inflow of water flow S to the propeller 8 is ensured. Not shown here is the locking of the housing 6 with respect to the horizontal as well as extended position.

In addition to an optimized water flow S, attention must be paid to the drive motor 9 in that it can be cooled accordingly and kept tight as a submersible motor.

For the cooling as well as for the seal of the interior of the carrier nacelle 10 can be used to fill appropriately treated water or food grade oil, the oil at the same time a very good insulator for the

Drive motor 9 represents. By means of a slight overpressure is also

ensures that never gets water from the pool 2 in the carrier nacelle 10. Has the cooling oil or the cooling water a food-grade

Color additive, so it can be very easily determined whether the carrier nacelle 10, on which also the propeller shaft is performed, is tight.

If the drive motor 9 cooled solely with air, it can be ventilated by a fan is attached to this and by means of a connection with a hose 30 which protrudes above the waterline WL and on which a hydrophobic air filter 30a sits can inside the drive motor 9 do not build up pressures due to the temperature rise and it remains a steady exchange of air with the ambient air guaranteed.

At the bottom of the housing 6 is another information display in the form of a rigid or rotatably mounted light projector 23, which z. B. can be a fast writing laser light 23a or a beamer and the swimming information projected the float on the floor 19 of the swimming pool 2.

3 shows a schematic front view of a countercurrent system 1 in a swimming pool 2 with a height-adjustable and horizontally adjustable housing 6 connected to the wall mount 4, a guide rail 27 with a nozzle cover 28 which can be displaced and hinged by means of hinges 20. The countercurrent system 1 should not only be a device for swimming training and surf fun, but can also be used as a massaging device at the same time by the housing 6, a guide rail 27 is located, which receives the nozzle cover 28. The float can pull this out and fold up by means of the hinges 20 and the lock 21 with the housing 6 tight and hold. The nozzle cover 28 has various individual nozzles 29, which are adjustable in angle, and can produce a narrow or wide jet and also allow pulsing of the jet, according to the prior art, and that a massage hose can be attached thereto, so that the countercurrent system 1 is a complete massaging device, which has a large height-adjustable stroke H, tilting is also necessary and thus reaches the desired body zones even better during massage activities. Fig. 4 shows a schematic side view of a countercurrent system 1 in one

Swimming pool 2 with a mounted on the pool wall 3 guide tube 5 on which a height and possibly longitudinally adjustable, and inclinable housing 6 is mounted on the guide tube 5 and the housing 6 is an electric or hydraulic active cylinder 32 and a filter 33 and a dosing 34 with injector 35 and controller 36 is mounted on the pool wall 3.

As described in Fig. 1, the housing 6 can be adjusted in height and tilted and by means of a hydraulic or electric action cylinder 32 in combination with the controller 36. The propeller flow P can be adjusted automatically in the slope T and with another, not shown here effective cylinder , also adjust in height H.

The use of a movable, ie adjustable and lockable flap 40 on the housing 6, supports the propeller flow P massively by bringing the circular, correspondingly round-shaped propeller flow P in a flat-oval shape and thus the float more water volume just below the waterline WL heading without For this purpose, the propeller flow P produces a hump on the waterline WL. If the diameter of the propeller 8 is not particularly large, then at the same time the propeller flow P widens and compensates for part of the smaller propeller diameter, so that the float nevertheless feels in a wide flow. When not using the countercurrent system 1, a spring, not shown here presses the flap 40 to the housing 6 high, so that it does not protrude into the pool 2.

When not using the countercurrent system 1 as a sports and recreational means, the countercurrent system 1 can be used at reduced speed as a filter system by at the inlet side E of the filter 33, which is attached to the housing 6 so that the suspended impurities in the pool 2 record, withhold and Introduce the cleaned water by means of the propeller flow P through the outlet side A in the housing 6 back into the pool 2. By means of the large diameter of the propeller 8 can thus be generated effective circulation at low flow velocity. Of course, the filter 33 can also be attached to the propeller 8 and becomes so

pressurized. This also allows a metering 34 between the two guide tubes 5, attach to the pool wall 3, equipped with an injector 35 and sensors 37, which control the water quality. The Indian

Dosing system 34 mounted controller 36 dispenses appropriately metered chemical agents into the water, advantageously directly into the water flow S, in order to introduce the active ingredients for a good water quality as quickly and widely distributed in the water circulation.

Thus, the countercurrent system 1 can also be mobile, it can be hung on the pool edge 3a or moored by means of vacuum-controlled suction means 38 at the pool edge 3a. Since the propeller flow P generally presses against the pool wall 3 and this is normally directed slightly upward, such suction means 38 are safe in their function.

Another possibility is to attach such suction means 38 to a chassis and to use this as a mooring and Einhänggemittel for the countercurrent system. Another possibility is when suspending the countercurrent system 1 and cover the swimming pool 2 by means of a cover to tilt the countercurrent system 1 by means of the deflector 39 out of the water and secure, in which case no suction means 38 are used, but Versch robberies on the edge of the pool 3a.

Of course, the invention is not limited to those shown and described

Embodiments limited. LIST OF REFERENCE NUMBERS

1 countercurrent system

2 swimming pools

3 pool wall

3a pool edge

4 wall bracket

5 guide tube

6 housing

6a anti-inflammatory plate

7 Kortdüse

8 propellers

9 drive motor

10 carrier gondola

1 1 pivot bearing

12 stroke lock

13 inclination plates

13a hand wheel

13b spindle

13b spindle nut

14 Display and operator panel

14a piezo button

15 network

16 flow straightener

17 pipe guide

18 image sensor

19 floor

20 hinge

21 lock

22 rail guide

22a rail

22b sledges

23 light projector

23a laser beam

24 handle 25 buoyancy body 26 connecting plate 27 guide rail 28 nozzle cover 29 individual nozzle

30 hose

30a air filter

31 battery

32 active cylinder 33 filter

34 Dosing system 35 Injector

36 controllers

37 sensor

38 suction means

39 deflector

40 flap

WL waterline

E inlet side

A Outlet side S Water flow H Height adjustment T Tilt

L Horizontal adjustment P Propeller flow H Lifting height

Claims

claims

Countercurrent system (1)

in

that the countercurrent system (1) is a horizontal, axial flow machine with a housing (6) in which the drive motor (9), the propeller (8), the pipe guide (17) with the lift skörper (25) are mounted and the Countercurrent system (1) at least two of the variable

Movement parameters which are, adjustment in the height (H), the horizontal (L), the inclination (T) and adjustable and can be locked or

the countercurrent system (1) has at least one of the listed technical means which are, Kortdüse (7), flap (40).

Countercurrent system (1) according to one of the preceding claims

characterized,

that the guide tube (5), the pipe guide (17) is mounted vertically displaceable and the guide tube (5) on the pool wall (3) or partially on

Pool edge (3a) fixed or rotatably mounted or by suction means (38) is mounted.

Countercurrent system (1) according to one of the preceding claims

characterized,

the housing (6) is mounted so as to be horizontally displaceable by means of a rail (22a) and a carriage (22b) and a part of the carriage (22b) is fastened to the pipe guide (17).

Countercurrent system (1) according to one of the preceding claims

characterized,

a net (15) is mounted on the housing (6) on the inlet side (E) or a filter (33) which receives impurities of all kinds in the water and prevents passage at the inlet (E) and at the outlet side (A ) a network (15) or as a flow straightener (16) is mounted.

Countercurrent system (1) according to one of the preceding claims

characterized.

the housing (6) has an anti-ventilation plate (6a).

6. countercurrent system (1) according to one of the preceding claims

characterized,

that the housing (6) by means of a parallelogram height adjustable (H) and horizontal (L) is adjustable.

7. countercurrent system (1) according to one of the preceding claims

characterized,

that on the housing (6) is a display and control panel (14), which provides the float information regarding Schwimmdaten folded and folded information regarding water analysis in the pool (2) delivers and the display is rotated by 180 ° and the display rotation by means of a Gyrosensors is triggered and in the closed state, the display can be powered by solar cells.

8. countercurrent system (1) according to one of the preceding claims

characterized,

on the housing (6) is a removable nozzle cover (12) which is attached to the side of the outlet side (A) and in the

Nozzle cover (12) individual nozzles (13) are mounted.

9. countercurrent system (1) according to one of the preceding claims

characterized,

a light projector (23) or an imaging sensor (18) is mounted on the housing (6).

10. countercurrent system (1) according to one of the preceding claims

characterized,

that the drive motor (9) is an electric motor or a hydraulic motor and the speed of the drive motor (9) is infinitely adjustable and a

Speed limiter can be attached.

11. countercurrent system (1) according to one of the preceding claims

characterized, the speed of the drive motor (9) is controlled by means of an imaging sensor (18).

Countercurrent system (1) according to one of the preceding claims

characterized,

in that the drive motor (9) is air-cooled or water- or oil-cooled with food-grade coolant and in air cooling a hose (30) is equipped with a hydrophobic air filter (30a) above the waterline (WL) and if required generates an overpressure against the submerged medium becomes.

Countercurrent system (1) according to one of the preceding claims

characterized,

that the countercurrent system (1) has an integrated, interchangeable,

having watertight battery (31) and the power supply to the drive motor (9) by means of a waterproof connector or by means of an inductive transmission.

Countercurrent system (1) according to one of the preceding claims

characterized,

that the buttons (14a) are piezo pushbuttons and by means of power generation

Can trigger radio signal.

Countercurrent system (1) according to one of the preceding claims

characterized,

that between the pool wall (3) and the housing (6) is a dosing (34), by means of a controller (36) and a sensor (37) the

Water quality controls and by means of an injector (35) chemical means in the water flow (S) passes and by means of the active cylinder (32), the water flow (S) optionally in the inclination (T) can be adjusted automatically by an algorithm.