EP0972503A2 - Pumping means particularly for whirlpool baths - Google Patents

Abstract

The feed device has an electric motor driving a rotor wheel (19) which extracts water from the interior of the bath via suction openings (11) in a suction rosette (42) , before injecting the water back into the bath as a jet via centrral discharge openings (3a), with an air channel (38) alowing air to be mixed with the injected water. The air channel contains a non-return device for blocking ingress of water when the rotor wheel is switched off.

Description

The present invention relates to a conveyor preferably for a whirlpool bath comprising one of a motor driven impeller by means of its water the tub space through intake openings of an intake rosette in a chamber is sucked in, the water then in one Beam through lying in a central area Outlet openings are expelled into the tub space, further comprising at least one air duct over which air can be mixed with the water jet.

Conveyors preferably for a whirlpool bath of the type mentioned are from the prior art known. For example, DE 3800401 C2 describes one such conveyor, in which the suction openings in front of a chamber in which the driven The impeller rotates and the intake openings on the outside a ring around the impeller and that there then sucked water from the impeller in a centric Area is expelled back into the tub space. The Admixture of air to the jet of water ejected takes place via air supply sleeves. These air supply sleeves are in at the other end with an annular chamber Connection, of which then in turn a hose nozzle radially comes on an air hose is plugged over which the Air is sucked in. This is a mixed water-air jet generated. In this known conveyor it can happen that after turning off the impeller when Venturi principle or the blower water into that Air duct system arrives and thereby from the water deposit entrained impurities in the air duct system. This is for the continued operation of the conveyor inconvenient and may require cleaning what is of course associated with an undesirable effort.

The object of the present invention is therefore a conveyor preferably for a whirlpool bath to create the genus mentioned at the beginning prevents water from flowing back into the air duct system becomes.

An object of the invention provides the solution to this problem Conveyor preferably for a whirlpool bath of the type mentioned at the beginning with the characteristic ones Features of the main claim. According to the invention, that in the flow path of the at least one air duct at least one backflow preventer is arranged such that backflow of water into the air duct is prevented. According to a further development of the invention at least a portion of an air duct is provided which for example in the beam direction or parallel to the beam direction runs and at least one further upstream connected to this and from there upwards extending portion of an air duct, being upstream at least one check valve is arranged.

In the conveyor device according to the invention, the air preferably fed via a blower. However, it is also possible, the air alternatively according to the Venturi principle feed like this with the one described above Conveyor device according to the prior art is the case. In the latter case, this means that the air from the ejected water jet entrained and thereby sucked in becomes. In the preferred embodiment in the sense of the invention however, a blower is arranged upstream that blocks the air drives through the air duct, which in turn then the emerging water jet is mixed and with this exit. With this training you can, however operate conveyor device according to the invention so that one no air mixed in but a pure water jet is expelled, then turning off the fan. As long as the blower is on, the blower pressure already the air duct is blown free and therefore usually prevents against the flow direction of the air Water gets into the air duct. However, if the blower is issued and the funding institution in the Operating mode is in which a pure water jet ejected, it would be after switching off the impeller possible that water flows back into the air duct and in the Water can be contaminated, for example Soap residue and the like, which is then in the air duct discontinue, which is naturally undesirable, as this is a Cleaning the air duct would be necessary. Therefore the conveyor device according to the invention has at least one Backflow preventer on the in this mode Conveyor with the fan switched off after switching off of the impeller prevents that in the air duct existing air against the suction direction in the further upstream sections of the air duct flows back. So there is an air volume in the section of the air duct downstream of the backflow preventer. This in turn results in water in the air duct cannot penetrate because the air remaining there through the backflow preventer do not flow back and also not from which water can be displaced. Preferably there is a backflow preventer in the flow path of each Air duct arranged higher than the respective one Outlet opening of this air duct.

The use of a blower in a preferred one The operating mode of the conveyor device according to the invention also has still the advantage that you can feed the strength of the Regulate airflow and on and off as needed can turn off. If according to the invention several such Conveyor device for a whirlpool bath provided then a central is preferably used arranged blower that these conveyors either all at the same time or possibly only a few Conveyors selectively supplied with an air flow.

According to a preferred development of the invention at least one backflow preventer in the flow path above arranged in a conically widening area, the to a section of an air duct with a tapered cross section connects. One can use such a constructive Training the air channels that are downstream of the Backflow preventer are, with a smaller cross section train and still use non-return valves that have a larger diameter.

Furthermore, it is preferably provided that at least a section of an air duct and / or at least one Check valves are located inside a motor shield, that concentrically surrounds the motor shaft. For example at least two spaced parallel sections Air ducts run in this motor shield and for everyone The air duct is then preferably one in each case Backflow preventer is provided so that both are apart independent air ducts protected against back-flowing water are when the conveyor is out of order.

For example, one can be related to the motor shaft provide radially arranged air supply duct through which the Air is sucked in / in and then into one Ring channel opens. This ring channel is then virtually a Distributor, from which there is then at least two downstream there are separate air ducts. You can do this constructively for example, run so that the conveyor Ring part, preferably made of plastic, which between a motor mount and the motor plate is arranged and one for each intended air duct has nozzle-like formation, in each of which there is a channel extends so that the air via radial air supply duct and the ring channel into the channels in the nozzle-like formations reached. Downstream following these channels in the neck-like formations of the ring part are then preferably within the motor shield Backflow preventer arranged in each channel.

From there, the air preferably passes over Trachea in the tub, each in the Motor shield can be used and in extension depending an air duct are arranged. You can if necessary, provide more air tubes than air channels are present, in which case the trachea is partially Air duct actually have no function, that is not to say are flowed through by air, but only to support one Serve receiving rings on the motor plate. For example, are only two air channels available, then it makes sense, at least to use another trachea so that the said Recording ring then in three places over his Circumference distributed, i.e. at 120 ° intervals, is supported.

The subclaims relate to preferred further developments of Task solution according to the invention. Other advantages of Invention result from the following Detailed description.

Fig. 1

einen Längsschnitt durch eine erfindungsgemäße Fördereinrichtung für einen Whirlpool;

Fig. 2

einen entsprechenden Querschnitt durch die Anordnung entlang der Linie II-II von Fig. 1;

Fig. 3

eine vergrößerte Detailansicht entlang der Schnittlinie III-III von Fig. 2;

Fig. 4

eine Vorderansicht einer erfindungsgemäßen Fördereinrichtung;

Fig. 5

eine Explosionsansicht einer erfindungsgemäßen Fördereinrichtung.

The present invention is described in more detail below using an exemplary embodiment with reference to the accompanying drawings. Show

Fig. 1

a longitudinal section through a conveyor device according to the invention for a whirlpool;

Fig. 2

a corresponding cross section through the arrangement along the line II-II of Fig. 1;

Fig. 3

an enlarged detail view along the section line III-III of Fig. 2;

Fig. 4

a front view of a conveyor device according to the invention;

Fig. 5

an exploded view of a conveyor device according to the invention.

First, reference is made to FIG. 1.
The conveyor device for a whirlpool shown in the exemplary embodiment is inserted according to the invention into the wall 24, for example of a bathtub, of which only a short piece is shown. The conveying device comprises an impeller 19. In the bore in the wall 24 of the tub, a sleeve-shaped motor mount 10 is inserted and fastened there, the motor mount 10 partially covering the bore in the tub wall 24 with an outer flange. The sealing ring 16, the washer 17 and the threaded ring 18 serve for the tight fastening of the motor mount 10 in the bore of the tub wall 24. The threaded ring 18 is screwed onto an external thread of the motor mount 10. A pot 23 is fastened to the motor mount 10 and covers a motor, for example an electric motor 29, which is located on the outside of the tub wall 24. A connecting cable 28 is inserted into the pot 23 via a screw connection 26 and a thread 22 and is detachably connected there to the electric motor 29.

The electric motor 29 is fastened to the motor shield 9, in which the motor shaft 41 rotatable and by means of a Mechanical seal 21 is mounted sealed. The Motor shield 9 is by means of O-rings 27 for motor mount 10 sealed off and supported on the support ring 15 when the pressure ring 14 over the threaded ring 13, which in the Internal thread of the motor mount 10 is screwed against the motor shield 9 is adjusted. The motor shaft 41 supports its front end, the impeller 19, which within the Chamber 42 rotates. To adjust the correct position of the impeller 19 is between this and the motor shaft 41 a nut 20 is arranged. The chamber 42 becomes a tub space covered by the intake rosette 1, the edge of which abuts on the tub wall 24 via the end ring 4. The intake rosette 1 carries a ring of intake openings 11, which are designed as radial slots and the can also be clearly seen in FIG. 4. This ring from slot-shaped suction openings 11 extends in Axial direction seen concentrically outside around the impeller 19 around. Water is therefore first of all via the suction openings 11 sucked into the chamber 42 by the impeller 19.

The central area of the intake rosette 1 is recessed and receives a beam guiding part 3, which by means of a Fastening ring 2 is held in a receiving ring 5 (see Fig. 1 and also Fig. 4). On the receiving ring 5 is also attached the intake rosette 1. This receiving ring 5 is, as can be seen from Fig. 1, seen from the tub behind the mounting ring 2.

The beam guiding part 3 has, as can also be seen from FIG. 4 can have several concentrically arranged ring bars, so that formed between these annular outlet openings 3a through which the water from the impeller 19 in the Tub space is ejected. To suck in dirt, for example hair or the like from the tub space prevent, there is still a strainer 25 a little further inside arranged, which covers the chamber 42, so that the sucked Water through the intake openings 11 of the intake rosette 1 the openings of the strainer 25 enters the chamber 42 and from there via the outlet openings 3a back into the Tub space is ejected.

Reference is now made to FIGS. 2 and 3 and based on this the air supply to the emerging water jet explained. As can be seen from Fig. 2 is initially a radial Air intake hose 37 extending from the motor mount 10 or an air intake line to a radial intake port 35 postponed. The radial formed by it Air supply duct 38 opens into an annular duct 43, which is how one 2 can be seen between the motor mount 10 and the motor shield 9 is formed by an inserted there Plastic ring part 34 or rubber ring part. This Plastic ring part 34 is also in the Exploded view shown in FIG. 5. Further Details of the air flow are shown in the sectional view 3 in conjunction with FIG. 2. The ring part 34 has two nozzle-like formations, in which channels 44 extend, each parallel to the axis of the radial extending air supply duct 38 each symmetrically offset on the outside and inwards relative to the motor plate 9 run. Seen further inward are the motor shield 9 backflow preventer 36 used, their function will be explained in more detail later. Following the two backflow preventer 36 are offset Central axis two air channels tapering in cross section 45 in the motor shield, as can be seen in FIG. 3. The taper is defined by a conical area 46 achieved below the backflow preventer 36. The air ducts 45 are then deflected by 90 ° in one direction parallel to the motor shaft 41 so that the air in this to Motor shaft passes axially parallel air channels 47 and over the Trachea 8 continues parallel to the axis parallel Motor shaft 41 flows in the direction of the tub space. Of the Air tubes 8 are three distributed over the circumference, however, only two of these air tubes 8, each with one Channel 47 communicate (see also Fig. 2) while the third air tube 8a, which can be seen in FIG. 1, has no air duct function, but only as Serves support tube, by means of which the receiving ring 5 as well as with the other two air tubes 8 on the motor shield 9 is supported. One can see in Fig. 1 that the front Opening of the tube 8a having only a supporting function for Receiving ring 5 is closed, as well as on the other No channel in the end of the tube 8a in the motor shield 9 runs. The location of the two effective for the air supply Channels 47 can also be seen in FIG. 2.

In contrast, the two connected to the channels 47 effective air tube 8 (see Fig. 3) connection with a corresponding bore 49 in the receiving ring 5, so that the Air can pass through and into another axial extension adjoining air duct 50 in the Mounting ring 2 the air can get into the tub space.

A central blower is provided for the air supply is not shown in the drawings. From this blower the air passes through the radial visible in Fig. 2 Air supply duct 38 in the air duct system within the Motor shields 9. However, the air does not escape where the air tubes 8 (see Fig. 3) end, but the Air is distributed over the circumference via an annular channel 51, which can be seen in the sectional view of FIG. 3. This ring channel 51 is practically formed by the two adjacent parts 2 and 3, i.e. the mounting ring 2 and the beam guide part 3, which are shaped so that between them the circumferential annular chamber 51 arises, how to 3 in section.

The beam guide part 3 is also in the Exploded view shown in FIG. 5. This has like you can see a flange-like view over the circumference protruding ring 3c several approximately semicircular Recesses 3b, in total in the exemplary embodiment there are nine such recesses. These recesses 3b act together with an equal number Air outlet bores 2a distributed in circumference the fastening ring 2 are arranged, as can be seen in FIG. 4 and Fig. 5 can be seen. There the air enters the Tub room. On the back of the mounting ring 2 are the air outlet bores 2a with the recesses 3b the beam guide part 3 in the assembled state of the arrangement in connection and the air coming from the trachea 8 is distributed over the ring channel 51 and then emerges from the Air outlet bores 2a.

The fastening ring 2 also has, as can be seen in FIG. 4 and FIG. 5 can be seen approximately distributed over the circumference 120 ° spacing three mounting holes 2b that are used during mounting can be used to intervene there with a tool.

The motor shield 9 also has a radial channel 9a, which can be seen in FIG. 1 and through which the section according to FIG. 2 is passed. This radial channel 9a serves to allow condensed water to run out of the inner area of the motor shield and the motor shaft bearing.
If the fan is now not switched on and a pure water jet is expelled into the tub space and if the impeller 19 is then switched off at this works council, then the non-return valves 36 (see FIG. 3) prevent the air still present in the duct 45, 47 from flowing back. since the backflow preventer 36 is only permeable to the opposite direction. This leads to an air column remaining in the channel 45, 47 and in the tube 8. This in turn prevents water flowing back from the tub space after the fan or the impeller 19 has been switched off via the air duct 50 in the fastening ring 2 into the parts of the air duct beyond the backflow preventer 36, for example the ring duct 43. This prevents water deposits and contamination from occurring there.

Claims (15)

Conveyor preferably for a whirlpool bath comprising an impeller which can be driven by a motor and by means of which water is sucked from the tub space through suction openings of an intake rosette into a chamber, the water then being expelled into the tub space in a jet through outlet openings lying in a central region, further comprising at least one air duct via the air can be mixed with the water jet,
characterized in that at least one backflow preventer (36) is arranged in the flow path of the at least one air duct (45) in such a way that backflow of water into the air duct (45, 47) is prevented after the impeller (19) has been switched off. Conveyor preferably for a whirlpool bath according to claim 1, characterized in that at least a portion of an air duct (47) is provided is in the beam direction or parallel to Beam direction runs and at least one further upstream connected to it and from this section extending upwards an air duct (45) is provided, upstream at least one backflow preventer (36) is arranged. Conveyor preferably for a whirlpool bath according to claim 1 or 2, characterized in that at least one backflow preventer (36) in the Flow path of the respective air duct (47, 45) higher is arranged as the respective outlet opening Air duct. Conveyor preferably for a whirlpool bath according to one of claims 1 to 3, characterized characterized in that at least one backflow preventer (36) in the flow path above a conical expanding area (46) is arranged, which is a tapered section of an air duct (45) connects. Conveyor preferably for a whirlpool bath according to one of claims 1 to 4, characterized characterized in that at least a portion of a Air duct (47, 45) and / or at least one Backflow preventer (36) inside a motor shield (9), the motor shaft (41) is concentric surrounds. Conveyor preferably for a whirlpool bath according to one of claims 1 to 5, characterized characterized in that at least two sections parallel spaced air channels (45, 47) in the Motor shield (9) run and for each air duct a backflow preventer (36) is provided. Conveyor preferably for a whirlpool bath according to one of claims 1 to 6, characterized characterized in that with respect to the motor shaft (41) radially arranged air supply duct (38) is provided, which opens into an annular channel (43). Conveyor preferably for a whirlpool bath according to one of claims 1 to 7, characterized characterized in that this preferably a ring part (34) made of rubber or plastic, which between a motor mount (10) and the motor plate (9) is arranged and one for each air duct has neck-like formation, in each of which Channel (44) extends so that the air over the radial Air supply duct (38) and the annular duct (43) into the ducts (44) in the nozzle-like formations. Conveyor preferably for a whirlpool bath according to one of claims 1 to 8, characterized characterized in that downstream following the Channels (44) in the nozzle-like formations of the Ring part (34) preferably in the motor plate (9) Backflow preventer (36) are arranged. Conveyor preferably for a whirlpool bath according to one of claims 1 to 9, characterized characterized that in extension for one Air duct (47) inserted into the motor shield (9) Air tubes (8) are provided through which the air flows. Conveyor preferably for a whirlpool bath according to one of claims 1 to 10, characterized characterized in that at least one air tube (8a) has no function as an air duct, but for support a receiving ring (5) on the motor plate (9). Conveyor preferably for a whirlpool bath according to one of claims 1 to 10, characterized characterized in that the from an air tube (8) escaping air in a circumferential ring channel (51) reached. Conveyor preferably for a whirlpool bath according to one of claims 1 to 12, characterized characterized in that the circumferential ring channel (51) over the air is distributed over the circumference, between a beam guide part (3) and a mounting ring (2) located. Conveyor preferably for a whirlpool bath according to one of claims 1 to 13, characterized characterized in that the air from the annular channel (51) over Drilled holes (2a) distributed over the circumference in the fastening ring (2) emerges into the tub space. Conveyor preferably for a whirlpool bath according to one of claims 1 to 14, characterized characterized in that as air outlet openings serving bores (2a) in an outer ring section the fastening ring (2) are arranged, the lies concentrically around the outlet openings (3a), through which the water is expelled into the tub space.

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