WO2014121902A1

WO2014121902A1 - Air intake device for a sanitary shower

Info

Publication number: WO2014121902A1
Application number: PCT/EP2014/000209
Authority: WO
Inventors: Eckhard Gransow; Jan Philipp TÜSHAUS
Original assignee: Grohe Ag
Priority date: 2013-02-11
Filing date: 2014-01-28
Publication date: 2014-08-14
Also published as: DE102013002235B4; DE102013002235A1

Abstract

The invention relates to a device for sucking in air for water conducted to the shower head of a sanitary shower, comprising an air nozzle (23), which can be connected to the supplied water in regard to flow and which has first and second nozzle channels (25, 27) that can be moved in relation to one another. The openings (35, 37) of the nozzle channels facing each other overlap in an open position (I) of the air nozzle (23) and are offset from each other in a closed position (II). According to the invention, at least one of the two nozzle channels (25, 27) is expanded up to the opening (35, 37) thereof so as to form a throttling chamber (41), which throttling chamber (41) connects the two nozzle channels (25, 27) to one another in an intermediate position (III) between the closed position (II) and the open position (I).

Description

Air intake device for a sanitary shower

The invention relates to a device for the suction of air to the shower head of a sanitary shower guided water according to the preamble of claim 1 and a shower head of a sanitary shower with such a device according to claim 10. In a sanitary shower the supplied water is mixed with air by means of the Venturi principle , The addition of up to 30% air reduces water consumption and also softens the water jet leaving the shower head. By way of example, DE 10 2004 059 328 A1 discloses a shower head for a sanitary shower, in which the air intake takes place directly in the shower head.

From DE 199 01 704 A1 a generic device for the suction of air for the shower head of the sanitary shower guided water is known. By way of example, the device is not integrated directly in the shower head, but rather is arranged upstream of the shower head. The addition of air takes place in the manner of a water jet pump, in which the water is injected at high speed from an outlet opening into a downstream cavity in which a negative pressure is generated. The cavity is in fluid communication with an air nozzle in connection, is sucked through the air into the cavity. The air nozzle has mutually adjustable first and second nozzle channels. In an open position, the two nozzle channels are aligned with their mutually facing mouth sections, whereby a maximum air passage is formed. The two nozzle body can manually between an open position and a Closed position to be postponed. In the closed position, the air passage of the air nozzle is blocked.

The two mutually facing mouth sections of the air channels are in DE 199 01 704 A1 in about the same size and have approximately diameter, which are only a few millimeters in size. In addition, the travel of the adjustable nozzle body between the open position and the closed position is very short, with a correspondingly steeply extending actuating characteristic. In this way, a sensible fine adjustment of the addition of air between the open position and the closed position is not possible. However, since the sensation and cleaning effect of differently aerated jets of water is different, such adjustment of the aeration is of great importance to the user.

The object of the invention is to provide a device for the intake of air for the shower head led to a sanitary shower water, in which the user can easily set different amounts of air for admixture with the water.

The object is solved by the features of claim 1. Preferred embodiments of the invention are disclosed in the subclaims.

The invention is based on the fact that in the prior art, the mutually facing mouth sections of mutually adjustable nozzle channels of the air nozzle are dimensioned so that between a closed and an open position, a characteristic curve is extremely steep, whereby no fine adjustment of the enclosed amount of air is possible , Against this background, at least one of the two nozzle channels is under formation a throttle chamber extended to its mouth opening. In an intermediate position between the closed position and the open position, the throttle chamber can connect the two nozzle channels at least partially with each other. In this way, in the intermediate position, a free air passage cross section is adjustable, with which the amount of air to be added to the water can be manually varied by the user in a simple manner.

The two nozzle channels of the air nozzle can be aligned in the open position in alignment with each other.

The mouth cross section at the mouth of the nozzle channel provided with the throttle chamber is composed of the opening cross section of the nozzle channel and from the opening cross section of the throttle chamber. In the above-mentioned open position, the opening cross section of the nozzle channel provided with the throttle chamber, without the opening cross section of the throttle chamber, be aligned with the opening cross section of the opposite orifice of the other nozzle channel. In addition, the opening cross sections of the two nozzle channels can be identical, for example of the same diameter.

In the closed position, the mouth openings of the two nozzle channels of sealing surfaces can be completely covered airtight. In the, according to the invention additionally possible intermediate position, the expanded by means of the throttle chamber orifice of a nozzle channel may be partially covered and indeed to form a free passage cross-section which is smaller than the passage cross-section in the above-mentioned open position. The first and the second nozzle channel may each be formed in a first and in a second nozzle body. The two nozzle bodies can each be integrated directly in the shower head. Alternatively, the two nozzle bodies may also be integrated in a separately thereof in the water supply line, that is to say in the shower hose, upstream of the shower head. Preferably, the two nozzle body can be moved in particular transversely to a channel axis by means of an adjusting movement about a travel between the open position and the closed position. Depending on the geometry of the throttle chamber in each case the user the appropriate air admixture can be adjusted in the intermediate positions. By way of example, the throttle chamber can protrude from the first nozzle channel by a predetermined throttle path and merge into a sealing surface. In an intermediate position, the throttle chamber is directly facing the opposite orifice opening of the second nozzle channel. In contrast, in the closed position, the mouth opening of the second nozzle channel is covered by the above-mentioned sealing surface of the first nozzle body in order to minimize or completely block the addition of air. The throttle chamber may also have a chamber cross-section, which is reduced stepwise or continuously over the aforementioned throttle section in the direction of the sealing surface. The first nozzle channel and / or the second nozzle channel may each be designed as a circular, hollow cylindrical bore, wherein the diameter of which may be approximately the same size. The first nozzle channel can also open at an inlet opening in the throttle chamber. For convenient adjustment of an addition of air, it is advantageous if the throttle chamber is limited by a, introduced in the first nozzle body wedge-shaped groove. The groove may preferably extend approximately with a ramp-shaped groove bottom to the sealing surface. This means that their groove depth decreases starting from the inlet opening to the sealing surface down to zero. The second nozzle channel can open at its air outlet side in a second mixing chamber, which is flowed through by the supplied water for air intake in the manner of a water jet pump. In this way, results in the mixing chamber, a negative pressure with which the air is sucked into the mixing chamber.

In one embodiment, the device for air intake may be an adapter arranged upstream of the shower head, which is interposed, for example, at the transition between the shower hose and a handle of the shower head. The above-mentioned first nozzle body may in this case be a rotationally adjustable, radially outer adjusting sleeve, while the second nozzle body is a radially inner connecting piece, through which water flows. The adjusting sleeve is mounted rotatably on the radially inner connecting piece, the water flowing under acceleration through a Venturi nozzle within the connecting piece and injected as a water jet through a downstream mixing chamber, which is fluidically connected to the air nozzle.

In a further embodiment, the device for air intake can be integrated directly in the shower head. The shower head may have a housing formed with a water supply line. At the water outlet side, a jet disk can be provided with water outlet possibilities. In this case, the first nozzle body can be arranged to be manually rotatable in the housing, while the second nozzle body is arranged in a rotationally fixed manner in the housing.

Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described. Show it:

Figure 1 is a partial side view of a shower head of a sanitary shower. Figures 2 to 4 are detail views of the device for air intake; 5 shows an actuating characteristic of the device;

6 is a sectional view of an adapter element for a

Shower head led shower hose; and

7 is an enlarged partial sectional view along the sectional plane D-D of FIG .. 6

In Fig. 1, the hose facing away from a shower head is shown in a schematic representation. The shower head is roughly shown schematically and shown only insofar as it is necessary for understanding the invention. Moreover, for reasons of clarity, further essential elements of the shower head have been omitted.

The shower head shown in FIG. 1 has, for example, a two-part housing 1, with one, the housing bottom forming adjusting disk 3 and a circumferential housing wall 5. The adjusting disk 3 is the user to adjust an air admixing about a central axis A of the housing 1 rotatably mounted, as described later. In the two-part housing 1, a rotatably arranged with the adjusting disc 3 upper part 7 and a fixedly arranged in the housing 1 lower part 9 is provided. The housing 1 is at its water outlet side in a conventional manner with a rotatable about the central axis A on the lower part of the 9th mounted jet disk 11 with indicated water outlet 13 closed.

In Fig. 1 the flow path of the guided water in the shower head is shown with arrows. Accordingly, the water from the shower hose, not shown, fed into a provided in the rotatable upper part 7 water pipe 15 and forwarded to a horizontal flow channel 17 in the lower part 9. The flow channel 17 has on its outlet side a Venturi nozzle 19, through which the water enters with acceleration as a water jet in a mixing chamber 21. Downstream of the venturi 19, an air nozzle 23 is provided for mixing air into the water jet. The air nozzle 23 has first and second channels 25, 27 through which, as described later, air is sucked into the mixing chamber 21 acting as a water jet pump. The mixing chamber 21 is shown in FIG. 1 in flow communication with a flat outlet chamber 29, from which the water is ejected through the jet disk 11.

As mentioned above, the air nozzle 23 has first and second nozzle channels 25, 27. These are each formed in an integrally formed on the upper part 7 upper first nozzle body 31 and in an integrally formed on the lower part 9 second nozzle body 33. In Fig. 1, the two nozzle channels 31, 33 are aligned with each other, that is, the mutually facing mouth openings 35, 37 overlap. The first upper nozzle channel 31 in FIG. 1 is fluidically connected to the environment via assembly spaces 38 formed on the edge side between the upper and lower parts 7, 9 and the outer housing 1 and an annular gap 39 between the jet disk 11 and the housing jacket 5. In Fig. 2, the air nozzle 23 is shown in a detail view. Accordingly, the first nozzle channel 25 is expanded to form a throttle chamber 41 in the axial direction to its mouth opening 35. The throttle chamber 41 is defined in the figures by a wedge-shaped groove which is introduced into a lower sealing surface 43 of the nozzle body 31.

The first nozzle channel 31 merges at an inlet opening 45 into the laterally projecting groove 41. The groove 41 extends over a throttle section l _D (Fig. 3) until the sealing surface 43, wherein the Forward cross-section of the groove 41 continuously up to the sealing surface 43 decreases towards. In Fig. 2, the air nozzle 23 is shown in its open position I. In the open position I, the two diameter-identical, cylindrical nozzle channels 31, 33 aligned with each other, whereby a maximum amount of air can be sucked into the mixing chamber 21. In contrast, in FIG. 4, the adjustable nozzle body 31 is displaced by a travel s from the open position I to the closed position II. In the closed position II, the mouth opening 37 of the second nozzle channel 27 is completely covered by the sealing surface 43. In this case, no air intake takes place in the mixing chamber 21.

In contrast, FIG. 3 shows the first nozzle body 31 in an intermediate position III, which is located at half the travel s between the open position I and the closed position II. Accordingly, the air flow, not shown in FIG. 3, is first conducted from the first nozzle channel 25 via the inlet opening 45 in the wedge-shaped groove 41 and guided under throttling to the mouth opening 37 of the second nozzle channel 33. In this way, there is a sucked air amount that corresponds to about half of the maximum intake air volume. The actuating characteristic of the indicated in Fig. 1 to 4 air nozzle 23 is illustrated in the diagram of Fig. 5, wherein on the X-axis of the travel is plotted and on the Y-axis, the suctionable air flow m _Lu ft is plotted. Accordingly, a maximum amount of air is sucked in the open position I, while in the closed position II, the air nozzle 23 is closed, that is, no air is sucked. According to FIG. 5, the actuating characteristic between the closed and open positions I, II is comparatively flat, whereby a simple adjustment of the admixed amount of air is made possible in a simple manner.

In Figs. 6 and 7, the air intake is not directly in the shower head, but rather upstream of the shower head in an adapter element 45 for the indicated shower hose 47. The adapter 45 is connected directly to an indicated handle 49 of the shower head. The structure and operation of the adjustable air nozzle 23 is substantially identical to the illustrated with reference to FIGS. 1 to 5 air nozzle 23. Therefore, reference is made to the above description.

In contrast to the preceding embodiment, in FIGS. 6 and 7 the first nozzle body 31 is a rotationally adjustable adjusting sleeve and the second nozzle body is a radially inner connecting piece with an internal thread 51 which can be screwed to the handle 49 of the shower head. In operation, the fitting 33 also operates as a water jet pump where supplied water is injected via a venturi 19 into a mixing chamber 21. Downstream of the venturi nozzle 19, a mouth opening 53 is provided, which is fluidically connected to the second nozzle channel 33 formed in the connecting piece 33. As can be seen from FIG. 7, the keyway acting as throttle chamber 41 extends, starting from the inlet opening 45, at an angle of rotation of approximately 90 [deg.] About the inner circumference of the adjusting sleeve 31. The result is accordingly Adjustment angle of about 90 ° between the open position I and the closed position II, which are conveniently adjustable by the user intermediate positions III.

LIST OF REFERENCES

casing

adjusting disk

housing jacket

rotatable upper part

non-rotatable lower part

ray disc

Water outlet options

water pipe

flow channel

Venturi nozzle

mixing chamber

air nozzle

first nozzle channel

second nozzle channel

exit chamber

first nozzle body

second nozzle body

orifices

Clear

annular gap

throttle chamber

sealing surface

entrance opening

adapter element

shower hose

Shower handle 51 internal thread

m _max maximum air volume l _D throttle section

A Housing center axis S Adjustment movement

d nozzle channel diameter

I open position

II closed position

III intermediate position s travel

Claims

Patent claims

Device for sucking in air for water guided to the shower head of a sanitary shower, with an air nozzle (23) which can be fluidly connected to the supplied water and which has mutually adjustable first and second nozzle channels (25, 27), the mouth openings (35, 37) of which face one another an open position (I) of the air nozzle (23), in particular aligned, are covered and are offset from one another in a closed position (II), characterized in that at least one of the two nozzle channels (25, 27) forms a throttle chamber (41) up to its mouth opening (35, 37), which throttle chamber (41) connects the two nozzle channels (25, 27) to one another in an intermediate position (III) between the closed position (II) and the open position (I).

Device according to claim 1, characterized in that the mouth cross section at the mouth opening (35) of the nozzle channel (25) provided with the throttle chamber (41) is composed of the opening cross section of the nozzle channel (25) and the opening cross section of the throttle chamber (41), and that in particular in the open position (I), the opening cross section of the nozzle channel (25) provided with the throttle chamber (41), without the opening cross section of the throttle chamber (41), is aligned with the opening cross section of the opposite mouth opening (37) of the other nozzle channel (27), and/or that the opening cross sections of the two nozzle channels (25, 27) are identical, in particular of the same diameter.

3. Device according to claim 1 or 2, characterized in that in the closed position (II) the mouth openings (35, 37) of the two nozzle channels (31, 33) are covered in an airtight manner, and / or that in the intermediate position (III) the mouth openings (35, 37) are partially covered, in particular with a free passage cross section that is smaller than the passage cross section in the open position (I).

4. Device according to claim 1, 2 or 3, characterized in that the first and second nozzle channels (25, 27) are each formed in a first and a second nozzle body (31, 33), which are in particular transverse to a channel axis an adjustment path (s) can be adjusted with an adjustment movement (S) between the open position (I) and the closed position (II).

5. Device according to one of the preceding claims, characterized in that the throttle chamber (41) projects from the first nozzle channel (31) by a throttle distance (l _D ) and merges into a sealing surface (43) which, in the closed position (II), forms the mouth opening (37) of the second nozzle channel (33) is covered, and in particular the chamber cross section is reduced in particular continuously in the direction of the sealing surface (43).

6. Device according to one of the preceding claims, characterized in that the first nozzle channel (25) merges into the throttle chamber (41) at an inlet opening (45), and / or that the throttle chamber (41) merges into the first nozzle body (31). introduced, in particular wedge-shaped, groove, the groove depth of which decreases to zero from the inlet opening (45) to the sealing surface (43).

Device according to one of the preceding claims, characterized in that the second nozzle channel (27) opens into a mixing chamber (21) through which supplied water can flow for air suction in the manner of a water jet pump.

Device according to one of the preceding claims, characterized in that the device is an adapter arranged upstream of the shower head, the first nozzle body (31) of which is a rotatably adjustable adjustment sleeve, and the second nozzle body (33) of which is a radially inner connecting piece on which the adjustment sleeve is rotatably mounted and through which the water can be fed for air suction in the manner of a water jet pump.

Device according to one of claims 1 to 6, characterized in that the device is integrated directly in the shower head, which has a housing (1) designed with a water supply line, on the water outlet side of which a jet disk (1 1) with water outlet options (13) is provided, and that in particular the first nozzle body (31) is arranged so that it can be rotated manually in the housing (1) and the second nozzle body (33) is arranged in a rotationally fixed manner in the housing (1).

10. Shower head of a sanitary shower with a device for sucking in air according to one of the preceding claims.