ES2293458T3 - OVERFLOW DEVICE FOR A BATHTUB. - Google Patents

Abstract

A control pipe (8) connects a bathtub (1) and a by-pass (6) between a riser tube (4) and a down tube (5). When the water level in the bathtub exceeds a required level i.e. under the connection of the control pipe and bathtub, air inflow into the by-pass via the control pipe is interrupted with excess water. Water is drained out of the bathtub via the control pipe, by-pass, and down tube.

Description

Overflow device for a bathtub.

The present invention relates to an overflow for a tank, in particular a bathtub, with an ascending tube in communication with the cuba, linked through a diversion with a descending tube, the descending tube being able to connect to a drain.

It is known how to arrange in bathtubs a valve body in a tub outlet that closes for fill it. To ensure that in the case of forgetfulness accidental interruption of water supply does not take place an overflow, on the wall of the bathtub is provided a overflow opening. The valve body at the bottom of the Bathtub is sometimes considered annoying.

From EP 0 446 177 A1 a known drain and overflow set for tanks in which it is provided  a float in the bottom of the tank to close a drain opening The overflow consists of a tube ascending with an ascending conduit and a return conduit and it presents in a higher zone a deviation in which it is arranged an air outlet opening with a valve retention. However, when the check valve is it causes a malfunction and a overflow there is the disadvantage that the tank can overflow due to pressure drops in the overflow or it may be the case that the water completely fills the return tube and the tank empties completely by the water column formed.

The objective of the present invention is to create an overflow for a tank that is simple to build and can evacuate different amounts of liquid inlet.

This objective is achieved by an overflow with the characteristics of claim 1.

According to the invention, in the area of the deflection is connected a control conduit that closes a air inlet to deflection when water exceeds a certain level in the tank In this way the deviation is optionally deaerated depending on the level of filling in the tank or the entry of air, so the function of the overflow depends in part on the control duct When the water level is found by below the deviation, this level can rise and, if necessary, to a control can also be carried out deaeration When the water level in the tank exceeds certain height, the control duct closes and the deviation can water coming out of the down tube. Due to flow losses caused by the tracing of the tube it is possible that the water level increase slightly in the tank, but then guarantee that in the area of the diversion no air is drawn through the control duct This ensures that also in the descending tube forms a column of water that aspirates the liquid in the direction of a drain, so the level of liquid in the tank The higher the liquid column in the descending tube, the greater the suction effect and the volumetric discharge evacuated. Water level adjusts to height of the deviation only after a supply interruption of liquid, establishing in this case again an air supply through the control duct. The control duct assumes both a safety function, so when overcoming a certain water level the overflow extracts from the tank a quantity enough of liquid so that the tank does not overflow.

Also, with the overflow configuration according to the invention a valve body can be dispensed with outstanding in the bottom area of the tank and arrange it in case necessary further down the drain zone. It is also possible mount the overflow slightly below the edge of the tank, so the maximum filling height of the tank can be particularly large

According to a preferred configuration of the invention, the control conduit is arranged or connected in essential at an average height in relation to the cross section of the deviation. The control duct may have a cross section smaller than the descending tube, the deflection and / or the riser and can run essentially horizontally When the control conduit is arranged approximately in the center of a cross section of the deviation, which corresponds to the cross section of the most point high deviation, flow conditions are obtained particularly favorable and the control conduit closes in the appropriate time. Preferably, the control conduit is arranged above the lowest point of the deviation at which the liquid begins to enter the descending tube.

According to the invention, the control conduit is attached with a deaeration tube attached in turn preferably with the riser tube. The water level in the tank It is reflected in this way in the control duct. For one deaeration of the control duct, the deaeration tube is preferably opened above the control duct.

The overflow is preferably used in combination with an outlet valve, being mounted on an outlet  of the tank an intermediate piece in which the tube is connected upward. Also, in the intermediate piece it can be connected also a deaeration tube as an entrance to the duct control. Therefore, the valve body is arranged below of the tank and does not bother the user of the tank. Preferably, the downstream tube is connected under a valve body to the drain that presents the outlet valve, so that it is achieved a type of compact construction although the drain function and overflow is arranged under the tank.

Other preferred and advantageous configurations of the overflow according to the invention are indicated in the dependent claims.

The invention is explained below. in detail based on several embodiments with Reference to the attached drawings. The figures show:

Fig. 1A to 1E Several views of a first example of realization of an overflow according to the invention.

Fig. 2A to 2D Several views of a second example of realization of an overflow according to the invention.

A tank 1 for the liquid capacity can be configured as a bathtub, sink, bidet, pool, etc. and understands in its bottom an exit opening 2. In the exit opening 2 an outlet tube 3 connected to a riser tube 4 is connected. The ascending tube 4 rises parallel to the wall of the tank 1 until a deviation 6 arranged below the upper edge 11 of the tank. Deviation 6 passes to a down tube 5 connected with a tube of outlet 7 that can be connected to a drain pipe or a drain. The ascending tube 4, the deviation 6 and the tube descending 5 have the shape of an inverted "U", setting deviation 6 the upper zone and being connected to a control conduit 8. The deflection zone 6 can comprise, in addition to a horizontal or curved section, also connection fittings that extend downwards.

A deviation 6 is connected to a control conduit 8. Control conduit 8 is connected to a deaeration tube 9 which runs essentially in parallel with the riser 4 and is connected to a lower area of the riser 4 or a section of the outlet tube 3. The tube deaeration 9 represents with respect to the tank 1 and the tube ascending 4 a communicating tube.

In the embodiment shown in the Figure 1, the deaeration tube 9 extends upwards by above the control conduit 8 and has an opening 10 fixed on an edge 11 of the tank 1.

When cuba 1 fills up to a certain liquid level, this liquid level exists both in the tube ascending 4 as in the deaeration tube 9.

When tank 1 is filled with liquid through of an inlet, the liquid level rises first to the dashed line 12 in figures 1D and 1E. Control duct 8 is open and there is a communication between deviation 6 and the air above the liquid level 12. The down tube 5 is empty, since the liquid level 12 is still below the deflection bottom wall 6.

When the liquid level rises to the line 13, the liquid begins to exit through the deviation 6 to the tube descending 5. In particular at higher flow rates in the outlet pipe 3 and in the riser 4, the liquid level You can go up to a line 14 where the volumetric output flow in the descending tube 5 corresponds to the volumetric flow rate of entry. Because the control conduit 8 is also filled with liquid, it is not possible to supply air to deflection 6 and in the descending tube 5 forms a column of liquid that sucks the tank liquid 1. A balance is therefore established between the incoming quantity and the outgoing quantity. When the supply is short, the liquid level drops back down to line 7.2, since at this moment the control conduit 8 and the air intake through the control duct 8 prevents it from continuing the aspiration of liquid by a column of liquid in the tube descending 5.

A second is shown in Figures 2A to 2D exemplary embodiment of an overflow, the components being similar marked with the same reference symbol with a apostrophe. In the embodiment shown in the figures 2A to 2D an intermediate piece 30 is mounted in an opening of exit 2 'of a tank 1'. This intermediate piece 30 presents two side connections, one for the 4 'riser and one for a deaeration tube 9 '. The riser 4 'is connected to the down tube 5 'through a deviation 6', being joined in the deflection zone 6 'a control conduit 8' with the tube deaeration 9 '. Deviation 6 'is configured as one piece and presents connections for the 4 'riser and the tube descending 5 'as well as a connection with the deaeration tube 9'. Also, in the 6 'deviation a conduit of 8 'control with a lower cross section, the control conduit 8 'also be a separate component.

In the intermediate piece is provided in the area in the background a valve body 24 that opens and closes a valve output 20. Below the valve body 24 is provided in the outlet 20 a connection for an outlet tube 7 'arriving from the tube descending 5 '. Exit 20 has a known closure of smells 23.

The valve body 24 is actuated by means of a drive mechanism mounted on an edge 11 'of the tank 1' and provided with a rotary knob 22. The drive mechanism it has a housing 21 connected in the upper area with the tube deaeration 9 '.

The overflow represented in figure 2 it comprises a tubular piece 16 with several connection fittings that it presents a 6 'deviation configured essentially in the form of U. The tubular part 16 has a tube section that runs in essential straight from which a connection fitting forks for the ascending tube 4 '.

One end of the straight tube section passes as a single piece through a curved section to a fitting of 5 'down pipe connection. The other end of the section Straight tube is detachably attached and sealed to the liquids with the housing 21 of the drive mechanism.

Also, of the straight tube section of the tubular piece 16 forks a connection fitting for the pipe deaeration 9 'that acts as a communicating tube. The fittings of connection for the riser tube 4 ', the downstream tube 5' and the deaeration tube 9 'essentially run in parallel one with other.

In the straight tube section of the tubular part 16 between the connection fitting for the riser 4 'and the fitting of connection for the deaeration tube 9 'a closing or separating element 17 that is supported in a manner sealed on the inner side of the tube section and is manufactured for example of an elastic material such as rubber. In the element of separation 17 the control line 8 'is configured as through hole The control line 8 '(through hole) is essentially lies at the height of the central longitudinal axis of the straight tube section of the tubular part 16 and / or is aligned with this central longitudinal axis.

It can also be seen that in the housing 21 of the drive mechanism a conduit of deaeration 15 presenting an end that communicates with the tube of deaeration 9 'and one end that communicates with an opening 10 'at the edge 11' of the tank 1 ', the end of the tube being deaeration 15 directed towards the opening 10 'at the edge 11' of the tank and open at a level above the control duct 8 '.

Also in this embodiment, it exists in the riser 4 'and in the deaeration tube 9' the same liquid level than in the bowl 1 '. The air in the tube deaeration 9 'can exit through the housing 21 and the duct control 8 'closes again when it exceeds a certain liquid level, so that flow conditions are obtained explained with reference to figure 1.

In the embodiments above The overflow has been explained in detail. It is also possible to combine the overflow with an outlet and provide as needed also other connections and pipes. Also, the cross sections of the overflow can be adapted according to need and it is also possible to provide cross sections different instead of the cross sections essentially constants of the ascending tube 4, the descending tube 5 and the deviation 6.

In addition, ascending tubes, deviations and the downcomers are only represented schematic and also falls within the scope of the invention that these they can be formed practically by several pieces and can be made of metal, plastic or other materials appropriate.

Claims (10)

1. Overflow for a tank (1, 1 '), in particular a bathtub, with a rising tube (4, 4') in communication with the tank, connected through a diversion (6, 6 ') with a down tube (5, 5 '), the descending tube being able to be connected to a drain, characterized in that in the area of the deviation (6, 6') a control conduit (8, 8 ') is connected which, when exceeding a liquid level in the tank (1, 1 ') closes an air inlet to the deflection (6, 6'), the control conduit (8, 8 ') being connected with a deaeration tube (9, 9') in communication with the riser tube (4, 4 '), and the deaeration tube (9, 9') presenting an opening (10) that can be fixed on an edge (11) of the tank (1) or being connected for deaeration with a housing (21) of a drive mechanism used to drive a valve body (24) of an outlet (2 ') of the tank. 2. Overflow according to claim 1 characterized in that the control conduit (8, 8 ') is essentially connected at an average height in relation to the cross section of the deflection (6, 6'). 3. Overflow according to claim 1 or 2 characterized in that the control conduit (8, 8 ') has a smaller cross-section than the descending tube (5, 5'), the deflection (6, 6 ') and / or the riser (4, 4 ') and preferably extends essentially horizontally. 4. Overflow according to one of claims 1 to 3 characterized in that the deaeration tube (9, 9 ') is open above the control conduit (8, 8'). 5. Overflow according to one of claims 1 to 4, characterized in that an intermediate part (30) in which the riser tube (4 ') is connected is mounted at the outlet (2') of the tank. 6. Overflow according to claim 5 characterized in that under the connection of the riser (4 ') an outlet valve (20) that can be closed is provided in the intermediate piece (30). 7. Overflow according to claim 6 characterized in that the down tube (5 ') is connected to the outlet valve (20) under the valve body (24). 8. Overflow according to one of claims 1 to 7, characterized in that the drive mechanism is provided with a rotary knob (22) covering an opening (10 ') configured in the edge (11') of the bowl (1 ' ). 9. Overflow according to one of claims 1 to 8 characterized in that the drive mechanism is mounted on the edge (11 ') of the tank (1'). 10. Overflow according to one of claims 1 to 8, characterized in that a deaeration duct (15) having an end that communicates with the deaeration tube (9 ') is configured in the housing (21) of the drive mechanism. and one end that communicates in a mounted state with an opening (10 ') at the edge (11') of the tank (1 '), the deaeration tube being open above the control conduit (8').