EP3018259A1 - Inlet and overflow fitting with drinking water protection function for bath tubs - Google Patents

Abstract

The invention relates to an inlet and overflow set for bathtubs with an overflow opening (2) which can be fixed to a passage opening of a bathtub wall and has a water connection and an overflow channel (5) opening at an overflow opening (12), an actuating element (8) for opening and closing a drain valve of the bathtub (7), wherein the overflow body (2) has a bearing portion (2.1) for receiving an actuatable by the actuating element (8) driving shaft or Mitnehmerstange and between the actuating element (8) and the overflow body (2) on the bearing portion (2.1) fixable fastening element (9) is arranged, and a starting from the overflow body (2) in the bath (7) extending water transfer channel (10). For such a supply and overflow set (1) with a simple structure provides reliable drinking water protection, so that the requirements of the standard DIN EN 1717 at least up to category 4 are met, the invention proposes that the water transfer channel (10) with a above the bathtub rim (7.1) extending deflection channel (10.4) is provided, which defines a horizontal flow section, which in the mounted state of the inlet and overflow set (1) above the bathtub rim (7.1), wherein the deflection channel (10.4) with at least one inlet channel (10.5) is provided, which opens below the overflow opening (12), so that inlet and overflow are separated from each other, and wherein the inlet channel (10.5) has a above the bathtub rim (7.1) arranged ventilation opening (10.7).

Description

The invention relates to an inlet and overflow set for bathtubs with a fixable at a passage opening of a bath wall overflow body having a water connection and an overflow opening at an overflow channel, an actuator for opening and closing a drain valve of the bathtub, wherein the overflow body has a bearing portion for receiving an operable by the actuating element driving shaft or driving rod and between the actuating element and the overflow body a fixable on the bearing portion fastener is arranged, and a starting from the overflow body in the bathtub extending water transfer channel.

Such inflow and overflow sets for baths are known (see, eg DE 93 01156 U1 ).

Drinking water systems must be designed so that the quality of the water in the drinking water installation can not deteriorate. In order to prevent a loss of quality due to the ingress of contaminated water, safety valves must be installed at hazardous points.

The standard DIN EN 1717 contains provisions for the prevention of contaminations of drinking water in drinking water installations and general requirements for safety devices for the prevention of drinking water contamination by backflow. Backflow of contaminated water in drinking water installations may be due to back suction or back pressure of the contaminated water. A suckback can occur, for example, by a partial negative pressure (pressure drop) in the public network, eg pipe burst or excessive water withdrawal. If there is a pressure difference at any point in the drinking water installation, which causes a reversal of the intended direction of flow of drinking water, and the drinking water can mix with the contaminated fluid, it can lead to contamination of the drinking water.

In DIN EN 1717, there are five different fluid categories with regard to the hazard potential of liquids which may come into contact with drinking water. Category 1 includes water for human consumption, which is taken directly from a drinking water installation. Category 2 concerns liquids that do not pose a threat to human health. By this is meant liquids which are suitable for human consumption, including water from a drinking water installation which may have a change in taste, smell, color or temperature. Category 3 concerns liquid which poses a health risk to humans due to the presence of one or more toxic or particularly toxic substances of LD 50> 200 mg / kg body weight. The term LD 50 indicates the oral dose of the toxin required to kill 50% of several test rats contaminated with it. Category 4 relates to liquid which poses a risk to human health through the presence of one or more toxic or particularly toxic substances of LD 50 ≤ 200 mg / kg body weight or one or more radioactive, mutagenic or carcinogenic substances. Category 5 concerns fluid that poses a health risk to humans due to the presence of microbial or viral agents of communicable diseases.

It is assumed that drinking water taken from the drinking water installation loses its drinking water quality. For example, for domestic bathtubs, it is assumed that bathing water falls into fluid category 3 due to bath additives. In a bathtub in a hospital even water of liquid category 5 is suspected, because here the presence of pathogens of communicable diseases can not be excluded.

Bathtub overflow sets with integrated inlet currently do not meet the requirements of DIN EN 1717 for the protection of drinking water. In order to protect the drinking water in the pipe network from contamination by backflow of bathing water or service water in bathtub spill sets with integrated inlet, is available to install the inlet opening at the tub overflow opening a drinking water safety valve according to the relevant standards. Usually, for this purpose, a so-called pipe interrupter is installed between the associated drinking water removal device (shut-off valve) and the integrated in the bathtub overflow inlet inlet. Pipe breakers are only flowed through by the drinking water when the drinking water removal fitting is opened. By self-venting, they prevent the creation of a negative pressure in the drinking water installation and thus a backflow of bathing water.

The present invention has for its object to provide a supply and overflow fitting of the type mentioned above, which provides a reliable construction of drinking water with a simple structure, so that the requirements of the standard DIN EN 1717 are met at least up to category 4.

This object is achieved by an inlet and overflow set with the features specified in claim 1. Preferred and advantageous embodiments of the inlet and overflow fitting according to the invention are specified in the subclaims.

The inlet and overflow fitting according to the invention has an attachable to a through hole of a bath wall overflow body having a water connection and an overflow opening on an overflow channel, an actuator for opening and closing a drain valve of the bathtub, wherein the overflow body has a bearing portion for receiving a by the actuating element having operable driving shaft or driving rod and between the actuating element and the overflow body a fixable on the bearing portion fastener is arranged, and extending from the overflow body in the bathtub water transfer channel, which is provided with a running above the bathtub rim deflection channel. The deflection channel defines a horizontal flow section, which lies above the bath rim in the assembled state of the inlet and overflow set. Of the Deflection channel is provided with at least one inlet channel, which opens below the overflow opening, so that inlet and overflow are separated from each other, wherein the inlet channel has a ventilation opening arranged above the bathtub rim.

The invention is based on the idea to arrange the water inlet or the inlet mouth of the inlet and overflow set above the maximum possible waterline of the bathtub, so that the water inlet (inlet mouth) can not be flooded by the bath water. The maximum possible waterline of the bathtub usually corresponds to the edge of the bathtub.

The inlet and overflow set according to the invention can be relatively easily realized in terms of their structural design. It provides a safe drinking water protection function and requires no moving parts. In particular, the inlet and overflow set according to the invention does not require a separately produced pipe breaker, which requires additional installation effort. Thus, that the inlet channel opens below the overflow opening, so that the inlet and the overflow are separated from each other, effectively prevents freshly inflowing water directly into drains the overflow or obstructs the overflow function. In particular, can be achieved by this separation of inlet and overflow undisturbed and thus shapely or uniform spray pattern of the incoming water.

An advantageous embodiment of the inlet and overflow fitting according to the invention is that this is designed as a bathtub handle. The inlet and overflow set according to the invention offers an added benefit in this case. In particular, in this embodiment may be dispensed with an additional tub handle and the associated assembly costs are avoided.

A further advantageous embodiment of the invention is characterized in that the deflection channel has a detachable lid on its upper side. This embodiment is particularly advantageous in terms of manufacturing technology, since it considerably simplifies the production of the water transfer channel in preferably one-piece combination with the deflection channel by injection molding.

In this connection, a further embodiment of the invention provides that the cover is fastened by means of at least one screw to a portion of the Umlenkkanals, said portion of the Umlenkkanals is provided with a threaded bore associated with the screw. The lid in this case can be reliably connected to the associated portion of the deflection channel and, e.g. for cleaning purposes, easily solve this.

According to a further advantageous embodiment of the inlet and overflow fitting according to the invention, a jet regulator is used in the at least one inlet channel, which is accessible after removal of the lid from the top of the Umlenkkanals. The jet regulator (also called aerator or mixing nozzle) serves to shape the water jet. It generates at different water pressures each a relatively soft, not rippling water jet.

According to a further advantageous embodiment, the inlet and overflow fitting according to the invention on a detachable cover (panel), which covers the running in the bathtub water transfer channel, the deflection channel, the at least one inlet channel and the overflow opening. The detachable cover is preferably hood-shaped. The cover is not only in decorative or aesthetic terms, for example, when it comes to give the visible portion of the inlet and overflow fitting a pleasing, shapely appearance, advantage, they may possibly also in terms of hygiene with appropriate design and smooth surface facilitate the cleaning of the inlet and overflow set. In particular, by the cover (aperture) a good thermal insulation of the Wasserüberleitungskanals, the deflection and the inlet channel can be achieved, which is advantageous in terms of their heating by hot incoming water and an optional use of the inlet and overflow as a tub handle. In this context, a further embodiment of the inlet and overflow fitting according to the invention provides that the cover is made of plastic and / or placed without contact relative to the water transfer channel and without contact relative to the at least one inlet channel on the deflection channel or placed.

A further preferred embodiment of the inlet and overflow fitting according to the invention is characterized in that the deflection channel is provided with at least two inlet channels, each opening below the overflow opening, so that inlet and overflow are separated from each other, each of the inlet channels arranged above the bathtub rim ventilation opening and wherein the water transfer channel is arranged between the inlet channels. This embodiment allows the realization of a high feed rate and overflow performance with a relatively small construction dimension of the supply and overflow, i. at a relatively small size or depth, with which the supply and overflow in the fully assembled state protrudes against the inside of the tub wall in the tub.

A relatively low, opposite the tub wall inside projecting construction of the inlet and overflow set with high inlet and overflow performance can be achieved according to an advantageous embodiment of the invention, in particular, that the inlet channels a rear, the passage opening of the bathtub wall facing tangent plane and a front side spaced therefrom Define tangent plane, wherein the water transfer channel between the two tangent planes is arranged.

Also, it is to achieve a relatively small construction dimension of the inlet and overflow set with high inlet and overflow performance of advantage, if according to a further preferred embodiment of the invention, the inlet channels are arranged one another at a clearance, corresponding to the diameter of the overflow opening or larger as the diameter of the overflow opening.

Preferably, a jet regulator is used in each of the inlet channels.

Fig. 1

einen Abschnitt einer Badewanne mit einer erfindungsgemäßen Zu- und Überlaufgarnitur einschließlich einer Blende (Abdeckung), in perspektivischer Ansicht;

Fig. 2

eine Seitenansicht der Zu- und Überlaufgarnitur der Fig. 1;

Fig. 3

eine Axialschnittansicht der entlang eines Einlaufkanals geschnittenen Zu- und Überlaufgarnitur der Fig. 2;

Fig. 4

eine perspektivische Vorderansicht auf einen in der Badewanne angeordneten Abschnitt der Zu- und Überlaufgarnitur der Fig.1 ohne Blende; und

Fig. 5

einen Abschnitt einer Badewanne mit der Zu- und Überlaufgarnitur der Fig. 1 in einer perspektivischen Explosionsdarstellung.

The invention will be explained in more detail with reference to a drawing illustrating an exemplary embodiment. Show it:

Fig. 1

a portion of a bathtub with a supply and overflow fitting according to the invention including a panel (cover), in perspective view;

Fig. 2

a side view of the inlet and overflow set the Fig. 1 ;

Fig. 3

an axial sectional view of the cut along an inlet channel inlet and overflow fitting the Fig. 2 ;

Fig. 4

a front perspective view of a arranged in the bathtub section of the inlet and overflow fitting of Fig.1 without aperture; and

Fig. 5

a section of a bathtub with the inlet and overflow fitting the Fig. 1 in a perspective exploded view.

The bath inlet and overflow set 1 shown in the drawing comprises an overflow body 2 which is arranged on the outside at a through-opening 3 of the tub wall and sealed using a sealing ring 4 is determined. The overflow body 2 has an overflow channel 5, a water connection (not shown in detail) and a holder 6 for an end portion of a Bowden cable (not shown) for actuating a drain valve (bottom valve). The overflow channel 5 has a nozzle-shaped connection section 5.1, on which a connected to the flow of the bathtub 7 overflow pipe can be inserted.

The inlet and overflow set 1 contains a drive part for a transmission part for opening and closing the drain valve of the bath 7, which can be actuated by means of a rotary handle 8. The overflow body 2 has a sleeve-like bearing section 2.1, whose opening faces the trough passage opening 3. In the bearing section 2.1, a pinion (not shown) is rotatably mounted, which is coupled on the one hand with the Bowden cable and on the other hand with a rotationally fixed to the back of the rotary handle 8 driving shaft.

Between the rotary handle 8 and the overflow body 2, a fixable on the sleeve-like bearing portion 2.1 fastener 9 is arranged, which has a water transfer channel 10. The water transfer channel 10 is welded to the fastening element 9 or integrally formed. The fastening element 9 can thus also be referred to as inlet and fastening element. The fastening element 9 is detachably connected to the overflow body 2. The sleeve-like bearing section 2.1 accommodating the driving shaft of the rotary handle 8 is provided for this purpose with an internal thread on which the fastening element 9 is secured by means of a radial projection, e.g. Bund or flange having fastening screw 11 is screwed. The fastening screw 11 is designed as a hollow screw, so that the driving shaft of the rotary handle 8 can be inserted through it into the sleeve-like bearing section 2.1 of the overflow body 2.

The fastening element 9 is designed in the manner of a flange and has an outer ring section 9.1, the outer diameter of which is greater than the diameter of the passage opening 3 of the trough 7. It also has an inner one Ring section 9.2, whose outer diameter is considerably smaller than the diameter of the passage opening 3 of the tub. The radially spaced-apart ring sections 9.1, 9.2 are integrally connected to one another by radially extending transverse webs 9.3 and delimit overflow openings or segments of an overflow opening 12 divided by the transverse webs 9.3. The inner diameter of the smaller annular section 9.2 is slightly larger than the diameter of the external thread of the hollow screw 11. so that the radial projection or flange 11.1 of the hollow screw 11 comes to rest on the ring section 9.2 and clamps the fastening element 9 against the tub wall.

The water transfer channel 10 has a pluggable pipe section (water inlet channel) 10.1. The end of the pipe section or water inlet channel 10.1 is externally provided with an annular groove (not shown) into which a sealing ring (not shown) is inserted. The water inlet channel 10.1 is inserted into a formed in the overflow body 2, communicating with the water connection connector and is detachably connected to this liquid-tight and due to the sealing ring.

The water transfer channel 10 is formed arcuate or angular. It comprises a channel section 10.2, which merges into the pluggable pipe section (water inlet channel) 10.1 and is extended by the latter. This channel section 10.2 or the pluggable pipe section 10.1 are arranged above the smaller ring section 9.2 of the fastening element 9. Furthermore, the water transfer channel 10 comprises a channel section 10.3, which extends from the plug-in pipe section 10.1 having channel section 10.2 in the assembled state of the inlet and overflow set 1 to above the bathtub rim 7.1. This section 10.3 of the water transfer channel 10 passes into a above the bathtub rim 7.1 extending deflection channel 10.4, which defines a horizontal flow section, which lies in the mounted state of the inlet and overflow set 1 with a vertical distance above the bathtub rim 7.1.

In the embodiment shown here, the deflection 10.4 is formed double-leaf. Each of the two wings (branches) of the deflection channel 10.4 is provided with an inlet channel 10.5. The respective inlet channel 10.5 opens into a level which is below the overflow opening 12. The inlet opening of the inlet channel 10.5 is designated 10.6. The inlet and overflow openings 12, 10.6 of the inlet and overflow set 1 are thus spaced from each other and accordingly spatially separated.

In order to prevent that at a pressure difference in the drinking water supply network, which causes a reversal of the intended direction of flow of drinking water in the provided with the inlet and overflow set 1 drinking water installation, bath water is sucked through the inlet channel 10.5 and thereby enters the deflection channel 10.4 points each of the inlet channels 10.5 a arranged above the bathtub rim 7.1 ventilation opening 10.7.

The deflection channel 10.4 has a cup-shaped section 10.41, which is provided on the upper side with a detachable cover 10.42. On the circumferential web 10.44 of the cup-shaped portion 10.41 a corresponding annular seal 13 is placed or plugged. The lid 10.42 is attached by screws 14 to the cup-shaped portion 10.41. For this purpose, the cup-shaped section 10.41 is provided with threaded bores, which are arranged, for example, in screwing domes 10.43 protruding from its underside.

In each of the two inlet channels 10.5 a jet regulator (aerator) 15 is used, which is accessible after removing the cover from the top 10.42 10.4 of the deflection channel. The respective inlet channel 10.5 has in its connected to the deflection 10.4 end a circumferential shoulder 10.51, which serves the positive or axial fixing of the jet regulator 15.

The distance between the underside of the jet regulator 15 or the ventilation opening 10.7 of the respective inlet channel 10.5 and the maximum possible water level, which corresponds to the top of the bathtub rim 7.1, represents a free flow path S. The above the bathtub rim 7.1 in the deflection channel 10.4 opening water transfer channel 10 extends so far up that the free flow path S is preferably at least 20 mm, more preferably at least 25 mm. By a correspondingly long free flow path S penetration of hot water from the bath 7 in the drinking water network with high security is prevented (see. Fig. 3 ).

The inlet channels 10.5 are tubular. They run essentially parallel to each other and define a rear side, the passage opening 3 of the bathtub wall facing tangential plane and a front side tangential plane spaced therefrom. The water transfer channel 10 is arranged between these two tangent planes (cf. FIGS. 3 to 5 ).

In Fig. 4 It can be seen that the inlet channels 10.5 are arranged at a distance from each other, which corresponds to the diameter of the overflow opening 12, namely the inner diameter of the outer ring portion 9.2 of the fastener 9. Alternatively, the inlet and overflow set 1 but also, for example, be formed so that the clear distance of the inlet channels 10.5 to each other is greater than the inner diameter of the outer ring portion 9.1 of the fastener 9. The outlet opening 10.6 of the respective inlet channel 10.5 is at least at the level of the lowest point of the outer ring portion 9.1 of the fastener 9 or - as in Fig. 4 shown - possibly even slightly deeper.

Furthermore, the inlet and overflow set 1 a detachable cover (panel) 16, which covers the running in the bathtub 7 water transfer channel 10, the deflection channel 10.4, the two inlet channels 10.5 and the overflow opening 12 of the fastener 9. The cover 16 is hood-shaped. she has a flat or substantially planar front wall 16.1 and a substantially parallel thereto, flat or substantially flat rear wall 16.2. The rear wall 16.2 contains or defines in the lower area a recess 16.3 which has a concave or semicircular edge 16.4 and serves to receive the fastening element 9. Preferably, the cover 16 is supported in the assembled state with the concave or semicircular edge 16.4 of its rear wall 16.2 on the outer ring portion 9.1 of the fastener 9 from.

The cover 16 is made of plastic, for example. In addition, it is preferably placed without direct contact relative to the water transfer channel 10 and without direct contact relative to the at least one inlet channel 10.5 on the deflection channel 10.4. In the front wall 16.1, an opening 16.5 is formed, which serves to pass the associated with the rotary handle 8 driving shaft.

The embodiment of the invention is not limited to the embodiment shown in the drawing. Rather, numerous variants are conceivable, which make use even in deviating from the embodiment of the invention specified in the claims. Thus, the supply and overflow set 1 according to the invention can for example also be advantageously designed as a bathtub handle.

Claims (11)

Supply and overflow fitting for bathtubs with an overflow body (2) which can be fixed to a passage opening (3) of a bathtub wall and has a water connection and an overflow channel (5) opening at an overflow opening (12), an actuating element (8) for opening and closing one Outlet valve of the bathtub, wherein the overflow body (2) has a bearing section (2.1) for receiving an actuatable by the actuating element (8) Mitnehmerwelle or Mitnehmerstange and between the actuating element (8) and the overflow body (2) on the bearing portion (2.1) festlegbares Fastening element (9) is arranged, and a starting from the overflow body (2) extending into the bathtub water transfer channel (10), characterized in that the water transfer channel (10) with a above the bathtub rim (7.1) extending deflection channel (10.4) is provided defines a horizontal flow section which in the assembled Zu is the supply and overflow set above the bathtub rim (7.1), wherein the deflection channel (10.4) is provided with at least one inlet channel (10.5), which opens below the overflow opening (12), so that inlet and overflow are separated from each other, and the inlet channel (10.5) has a above the bathtub rim (7.1) arranged ventilation opening (10.7). Supply and overflow fitting according to claim 1, characterized in that the deflection channel (10.4) has on its upper side a detachable cover (10.42). Supply and overflow fitting according to claim 2, characterized in that the cover (10.42) by means of at least one screw (14) on a portion (10.41) of the Umlenkkanals (10.4) is fixed, said portion (10.41) of the Umlenkkanals with one of the screw (14) associated threaded hole is provided. Inlet and overflow set according to claim 2 or 3, characterized in that in the at least one inlet channel (10.5), a jet regulator (15) is inserted, which is accessible after removing the cover (10.42) from the top of the deflection channel (10.4). Supply and overflow set according to one of claims 1 to 4, characterized by a detachable cover (16) extending in the bathtub (7) water transfer channel (10), the deflection channel (10.4), the at least one inlet channel (10.5) and the Overflow opening (12) covers. Supply and overflow fitting according to claim 5, characterized in that the cover (16) is made of plastic and / or at least without contact relative to the water transfer channel (10) and without contact relative to the at least one inlet channel (10.5) on the deflection channel (10). 10.4) is placed. Supply and overflow set according to one of claims 1 to 6, characterized in that the deflection channel (10.4) is provided with at least two inlet channels (10.5), each below the overflow opening (12) open, so that inlet and overflow are separated from each other, wherein each of the inlet channels (10.5) has a ventilation opening (10.7) arranged above the bathtub rim (7.1), and wherein the water transmission channel (10) is arranged between the inlet channels (10.5). Supply and overflow fitting according to claim 7, characterized in that the inlet channels (10.5) define a rear, the passage opening (3) of the bathtub wall facing tangential plane and a spaced apart front tangent plane, wherein the water transfer channel (10) is arranged between the two tangent planes. Supply and overflow fitting according to claim 7 or 8, characterized in that the inlet channels (10.5) are arranged at a distance from each other, which corresponds to the diameter of the overflow opening (12) or greater than the diameter of the overflow opening (12). Inlet and overflow set according to one of claims 7 to 9, characterized in that in each of the inlet channels (10.5), a jet regulator (15) is inserted. Inlet and overflow set (1) according to one of claims 1 to 10, characterized in that it (1) is designed as a bathtub handle.

Images