CZ309451B6 - Interruption module for preventing back-suction of water from the toilet bowl with a pressure flush and a toilet with a pressure flush and an interruption module - Google Patents

Abstract

The interruption module (1) is used to prevent the intake of contaminated water from the toilet bowl (2) of the toilet (3) with pressure flushing. The interruption module (1) is arranged behind the flush valve (19) of the toilet (3) with pressure flushing. The interrupter module (1) has a directed flow rectifier (11) which helps the accelerated flushing water to more effectively overcome the safety air gap without limiting the safety function of the interrupter module (1).

Description

Interruption module for the prevention of back-suction of water from the toilet bowl with a pressure flush and a toilet with a pressure flush and an interruption module

Field of technology

The invention relates to the area of secure operation of toilets with a pressure flusher for accelerating the flushing water, so that contaminated water does not suck back from the toilet bowl into the water line through which water is supplied to the toilet.

Current state of the art

According to the European standard EN 1717 valid on the date of submission of this invention application, manufacturers of sanitary equipment are obliged to prevent the risk of contamination of drinking water in drinking water distribution systems with class 5 liquid, i.e. water from flushing toilets, caused by back-suction of toilet water into the water supply line. The goal of the regulation according to the standard is to prevent the ingress of pathogenic microorganisms from the toilet water into the water supply. The EN 1717 standard presents the entire palette of sanitary technology, but for this application, group A type D - concerning free discharge with an injector - is relevant.

There are known breakers for the back suction of water into the water supply line. An example of such a solution is the invention from document CN 206809880 U. The principle of the breaker is the introduction of an air gap according to the standard into the flow of supplied water. As long as the water flows in the correct direction, the breakers are inactive and the air gap does not manifest itself, but as soon as the moment of reversal of the flow of the supplied water occurs, the air from the air gap replaces the reversed water flow, thus preventing water from being sucked from the toilet bowl, as there is a loss of negative pressure in the of the section between the breaker and the water outlet to the toilet bowl.

Nowadays, toilets with a pressure flush are known, the principle of which is to improve the flushing of the bowl with the help of the acceleration of the flushing water, i.e. with the help of flushing water with added kinetic energy or with the help of flushing water with a so-called shock wave. A prime example is the invention from document EP 3294963 B, or the invention from document US 2019/330831 AI. The added energy is transferred to the water by the so-called air accumulator, in which the air is compressed, the energy of which is transferred to the flushing water during flushing. Air accumulators do not need an additional source of energy, as they use the energy from the water pressure of the water line to compress the air.

Unfortunately, existing water back suction interrupters, due to their construction, greatly limit the transfer of energy from the water supply to the air accumulators, thus limiting the use of toilets with pressure flushing, or reducing their efficiency below the permissible limit.

The task of the invention is to create an interrupting module that would protect the water supply line from the back-suction of water from the bowl of a toilet with a pressure flush, and which would have a minimized effect on the efficiency of a toilet with a pressure flush, the task of the invention is also to create a toilet with a pressure flush fitted with the invented interrupting module .

The essence of the invention

The set task is solved using an interrupt module created according to the invention below.

The interrupting module is used to prevent back-suction of water from the toilet bowl with a pressure flusher to accelerate the flushing water. The interrupt module consists of an input part and an output part. The inlet section shows an inlet for accelerated flushing water and at least one

- 1 CZ 309451 B6 outlet nozzle for targeting the stream of accelerated flushing water. The outlet part has at least one opening for receiving a targeted stream of accelerated flushing water from the outlet nozzle and at least one connection for connecting the discharge of accelerated flushing water to the toilet bowl. At the same time, an air gap is created between the outlet nozzle and the hole.

The essence of the invention is that the interrupter module has a rectifier in the air gap for rectification of the targeted stream of accelerated flushing water. Although the outlet nozzle creates a targeted water stream, it is quite common for the streamlines in the targeted water stream to have a divergent behavior that causes energy and water loss in the gap region. Thanks to the rectifier, these losses are minimized without limiting the safety function of the air gap.

The task of the invention is to interrupt the line of accelerated flushing water, so that in the event of a flow reversal, water from the toilet bowl is not sucked into the water line. This is achieved by creating an air gap. In order for the accelerated flushing water to overcome the gap, it is necessary to create a targeted stream using the exit nozzle, which overcomes the safety air gap, after which the accelerated flushing water continues through the exit part of the interrupter module. The targeted current reaches the output part of the interruption module precisely through the hole for receiving the targeted current. If the flow is reversed, the opening will not create any flow, on the contrary, air will be sucked in through the outlet nozzle, which will protect the water line from contamination. As for the accelerated flushing water, after the first injection of the accelerated flushing water into the outlet part of the interruption module, due to the pressure present in the water in the outlet part, a so-called siphon effect occurs, where the outlet part tends to suck in the incoming accelerated flushing water through the opening for receiving the targeted stream of water water. This means that the energy loss of the accelerated flushing water is at an acceptable level.

The inventive deflector is formed by a continuous conical finned body with annular fins, the narrower base of which is turned towards the outlet nozzle, while its wider base is turned towards the opening to receive the targeted stream of accelerated flushing water. The deformation of the targeted stream increases with increasing distance from the exit nozzle, and therefore the widening conical shape directs the gradually diverging streamlines towards the opening. In addition, it is advantageous that the gaps between the annular ribs do not prevent the access of air in case of flow reversal, so that the function of the air gap is not limited. At the same time, the deflector is provided with at least one shield for capturing and guiding the splashed flushing water outside the conical ribbed body. This is advantageous for the reason that there are small losses of energy during the rectification of the targeted current, which are manifested by splashing of water. This water needs to be captured and properly drained.

Advantageously, in the inlet part between the inlet for accelerated flushing water and at least two outlet nozzles, at least one distributor of the flow of accelerated flushing water can be integrated for dividing the accelerated flushing water into individual outlet nozzles. If the interruption module is intended for deployment in toilets with multiple injection nozzles of accelerated flushing water into the toilet bowl, then this embodiment of the invention is very advantageous.

Advantageously, the shield is arranged perpendicular to the targeted stream of accelerated flushing water so that as many flying water droplets as possible adhere to it.

It is advantageous if at least some of the annular fins are bevelled towards the targeted water flow from their outer circumference towards their inner circumference. The chamfering of the annular fins creates a funnel-like shape that "smoothes" the targeted current, thereby reducing the divergence of the streamlines, thus maintaining the targeting of the current, which then manifests itself in a better siphon effect in the output part of the interrupter module.

In a preferred embodiment of the interrupter module rectifier, at least one annular rib is equipped with an elastic O-ring, the diameter of which corresponds to the diameter of the targeted stream of accelerated flushing water with a diameter deviation of +/- 10%. The added O-ring directs the targeted stream, but due to its elasticity, it is also pliable so that the targeted stream does not deform.

-2CZ 309451 B6

In another advantageous embodiment of the interrupter module rectifier, the annular ribs are made of elastic material. The elastic fins direct the targeted stream, which uses its energy to deflect it from its rest position, thus reducing the gaps between the fins for air intake and improving energy conservation in the accelerated flushing water. If a flow error occurs, the elastic fins will return to their rest position, and in case of a flow reversal, the elastic fins will expand due to the elasticity and the flowing air so that the intake air has less resistance.

Advantageously, the interrupting module is provided with a collection container for splashed water, which is arranged in the area under the inlet part, the outlet part and under the air gap. Leaked water drips into the collection container under its own weight. It is advantageous if the collection container is equipped with at least one outlet for the collected water to the toilet bowl.

The invention also includes a toilet with pressurized flushing for accelerating the flushing water, which essentially consists of a connection to the water supply from the water supply line, then at least one tank of pressurized flushing water connected to the connection, then a flushing valve connected to the tank of pressurized flushing water, further from at least one injection nozzle, which is an accelerated flushing water pipe connected to the flushing valve, for injecting accelerated flushing water into the toilet bowl, further from the invented interrupter, and last but not least from the toilet bowl.

The essence of the invention is that the interruption module interrupts the water line of accelerated flushing water between the flushing valve and the injection nozzle, while the water line behind the flushing valve is connected to the input of the inlet part of the interruption module, and at the same time the water line of the flushing water in front of the injection nozzle is connected to the output connection parts of the interrupt module. Such an arrangement of the interrupter module behind the flush valve is important so that the pressurized water reservoir can collect energy from the water pressure in the water line.

It is advantageous if the interrupting module is stored in a horizontal position in a toilet with pressure flushing. The horizontal position is the most preferred because of the siphon effect in the outlet part of the module. In addition, it is also practical from the point of view of the construction of the entire toilet with pressure flushing, as it is the least demanding on space.

Last but not least, it is advantageous if the collection container of the interruption module is arranged at the upper edge of the toilet bowl. Due to the water dripping into the container, it is advantageous that it is accessible for regular cleaning.

Among the advantages of the invention is the possibility of its use in toilets with a pressure flush, because although the invention enables the physical interruption of the water supply line in order to prevent the absorption of contaminated water, at the same time the invention minimizes the energy losses of the accelerated flushing water. The invention is structurally simple, and therefore its deployment in new products is easy and not too economically expensive. The interrupt module can be easily cleaned and serviced.

Clarification of drawings

Said invention will be further explained in the following drawings, where:

Fig. 1 shows a partially open model of a toilet with pressure flushing and with an interrupting module according to the invention;

Fig. 2 shows an open model of a toilet with pressure flushing and with an interruption module according to the invention;

Fig. 3 shows a top view of a model of an interrupter module installed on a pressurized toilet;

-3 CZ 309451 B6 Fig. 4 shows a model of a rectifier consisting of a conical ribbed body;

Fig. 5 shows a section of the rectifier model according to Fig. 4;

Fig. 6 shows a model of a rectifier consisting of a conical ribbed body and equipped with elastic O-rings;

Fig. 7 shows a diagram of a rectifier with elastic annular fins;

Fig. 8 shows the principle of operation of the rectifier according to Fig. 7;

Fig. 9 shows the circuit diagram of the interruption module in a toilet with pressure flushing.

An example of the implementation of the invention

It is to be understood that the specific embodiments of the invention described and illustrated below are presented for illustration purposes and not as a limitation of the invention to the examples shown. Those skilled in the art will find or be able to ascertain, using routine experimentation, a greater or lesser number of equivalents to the specific embodiments of the invention described herein.

Fig. 1 shows a model of toilet 3 with pressure flushing. Within the model, the flush module 1 is made visible, which is in a horizontal position above the upper edge of the toilet bowl 2. In Fig. 2, the same model of the toilet 3 with pressure flushing, but exposed, so that other components of the toilet 3 with pressure flushing can be observed, which include reservoir 17 of pressurized flushing water and flushing valve 19.

In Fig. 3, the interruption module 1 is shown in detail. The interruption module 1 consists of an inlet part 4, which shows an inlet 5 of accelerated flushing water formed by a pipe, a distributor 10 of the stream of accelerated flushing water and an outlet nozzle 6. The inlet part 4 can be plastic, but the choice suitable material is not limiting in terms of function. In the depicted embodiment of the invention, the inlet part 4 has two outlet nozzles 6 and a distributor 10, which distributes the accelerated flushing water in a ratio of 70 to 30. The outlet nozzle 6 forms a targeted stream of accelerated flushing water, which has the task of overcoming the air gap.

The outlet part 7 has the task of capturing the targeted stream that overcomes the air gap and diverting it via the connection 9 to the accelerated flushing water drain formed by flexible hoses 23 that lead to the injection nozzles 20 of the toilet 3. The outlet part 7 has holes 8 into which the targeted current falls. The outlet part 7 is materially similar to the inlet part 4. The outlet part 7 with the connected flexible hoses 23 is at least partially flooded with water from the previous flush. Thanks to the presence of water during the next flush, the water present moves, which causes a siphon effect, which ultimately helps to suck water into the opening 8. The longer the outlet part 7, the more effective the siphon effect occurs. The flexible hoses 23 are clearly visible in Fig. 3.

In this embodiment of the invention, the air gap is fitted with a rectifier 11, which is formed by a conical body of annular ribs 12. For hygienic reasons, the rectifier 11 does not touch the inlet part 4 or the outlet part 7. Part of the rectifier 11 are shields 13 for catching splashed water. There is a collecting container 16 under the interrupting module 1.

Fig. 4 and Fig. 5 show the rectifier 11. In the pictures, the annular ribs 12 are visible, which, by their bevelling into the form of a funnel, direct the not shown targeted stream passing through. Furthermore, the shields 13 for collecting splashed water are clearly visible and, last but not least, the installation sleeves 21 are visible. The installation sleeves 21 are one possible solution that meets

-4CZ 309451 B6 the condition that the rectifier 11 does not touch the inlet part 4 and the outlet part 7. In this illustrated embodiment of the invention, the annular ribs 12 are made of solid plastic.

Fig. 6 shows an embodiment of the invention in which the two annular ribs 12 of the rectifier 11 have an elastic O-ring 14 attached to each other. The diameter of the O-ring 14 is chosen to match the targeted current, but since it is not possible to ensure this in 100% of the cases of flowing targeted currents, a deviation of up to 10% of the expected diameter of the targeted current is chosen. O-ring 14 is, for example, made of silicone.

Fig. 7 shows a rectifier 11 whose annular rings 12 are flexible, e.g. silicone. In order to remain in the conical arrangement, they are fixed to the frame 22, which is a supporting element. As can be seen from Fig. 8, the advantage of the elastic ring ribs 12 lies in the fact that with a proper flow of the targeted stream of water, the air suction gap is narrow, see mark b, because the passing targeted stream will cause the ring ribs 12 to be deflected from position a to position β. In case of interruption of the flow, the annular ribs 12 return to position a and the gap for the passage of air returns to the size see mark a. In the case of rotation of the flow, on the other hand, the annular ribs 12 open into the gap mark c by tilting to position y, thereby increasing the permeability of the rectifier 11 for air.

Fig. 9 shows a diagram of the connection of the interrupting module 1 to the toilet 3 with pressure flushing. Connection 18. Pressurized flushing water reservoirs 17 and flushing valve 19 are in front of interrupting module 1 from the point of view of correct water flow.

Not only does the invention meet the requirement for hygienic security against contamination of the water supply line, but it also minimizes the energy losses of the accelerated flushing water. Firstly, it does not limit the preparation of accelerated flushing water in the tanks 17 of pressurized flushing water, because it does not interrupt the water supply line. Secondly, with the help of the rectifiers 11, it prevents the splitting of the streamlines in the targeted stream, thereby preventing energy and volume losses. Last but not least, thanks to the design of the outlet part 7, in which the hole 8 subsequently changes into the connection 9 for the discharge of accelerated flushing water, and due to the fact that the outlet part 7 is flooded with water in the area of the connection 9 and the discharge of accelerated flushing water after the first flush, so it is upon impact of a targeted stream of accelerated flush water, a siphon effect is present, which causes suction, which reduces the resistance to the impinging accelerated water, thereby reducing the energy loss of the flush water.

Industrial applicability

The interruption module for the prevention of back-suction of water from the toilet bowl with a pressure flush and the toilet with a pressure flush and the interruption module according to the invention find application as sanitary equipment of human settlements.

Claims (11)

PATENT CLAIMS 1. Interruption module (1) for preventing back-suction of water from the bowl (2) of the toilet (3) with a pressure flusher for accelerating the flushing water consisting of an inlet part (4) showing an inlet (5) for accelerated flushing water and at least one outlet nozzle ( 6) for targeting the stream of accelerated flushing water, and further consisting of an outlet part (7) showing at least one opening (8) for receiving the targeted stream of accelerated flushing water from the outlet nozzle (7) and at least one connection (9) for connecting the discharge of accelerated flushing of water into the toilet bowl (2), while an air gap is formed between the outlet nozzle (6) and the opening (8), characterized by the fact that it includes a rectifier (11) for directing the targeted stream of accelerated flushing water arranged in the air gap, which is formed by a through conical ribbed body with annular ribs (12), the narrower base of which is turned towards the outlet nozzle (6), while its wider base is turned towards the opening (8) for receiving the targeted pr of the accelerated flushing water, and at the same time the deflector (11) is provided with at least one shield (13) for catching and guiding the sprayed flushing water outside the conical ribbed body. 2. Interruption module according to claim 1, characterized in that in the inlet part (4) between the inlet (5) for accelerated flushing water and at least two outlet nozzles (6) at least one distributor (10) of the stream of accelerated flushing water is integrated for dividing accelerated flushing water into individual outlet nozzles (6). 3. Interruption module according to claim 1 or 2, characterized in that the shield (13) is arranged perpendicular to the targeted stream of accelerated flushing water. 4. Interruption module according to one of claims 1 to 3, characterized in that at least some of the annular ribs (12) are beveled in the direction of the targeted water flow from their outer circumference towards their inner circumference. 5. Interruption module according to one of claims 1 to 4, characterized in that at least one annular rib (12) is provided with an elastic O-ring (14), the diameter of which corresponds to the diameter of the targeted stream of accelerated flushing water with a diameter deviation of +/- 10 %. 6. Interruption module according to one of claims 1 to 5, characterized in that the annular ribs (12) are made of an elastic material. 7. Interruption module according to one of claims 1 to 6, characterized in that it is provided with a collection container (16) of splashed water, which is arranged in the area under the inlet part (4), the outlet part (7) and under the air gap. 8. Interruption module according to claim 7, characterized in that the collection container (16) is provided with at least one drain of the collected water into the toilet bowl (2). 9. Toilet (3) with pressurized flushing for the acceleration of flushing water consisting of a connection (18) to the water supply from the water supply line, further from at least one reservoir (17) of pressurized flushing water connected to the connection (18), further from a flushing valve (19) ) connected to the reservoir (17) of pressurized flushing water, further from at least one injection nozzle (20), which is a water line of accelerated flushing water connected to the flushing valve (19), for injecting accelerated flushing water into the toilet bowl (2), further at least by one interrupting module (1) for preventing back-suction of water according to one of claims 1 to 8, and further from the toilet bowl (2), characterized in that the interrupting module (1) is included in the water line of accelerated flushing water between the flushing valve ( 19) and the injection nozzle (20), while the water line behind the flushing valve (19) is connected to the input of the inlet part (4) of the interrupter module (1) and at the same time the water line of the flushing water before the injection nozzle (20) connected to the connection (9) of the output part (7) of the interruption module (1). -6 CZ 309451 B6 10. Toilet with pressure flushing according to claim 7, characterized in that the interrupting module (1) is stored in a horizontal position in the toilet (3) with pressure flushing. 11. Toilet with pressure flushing according to claim 9 or 10, characterized in that the collection container (16) of the interruption module (1) is arranged at the upper edge of the toilet bowl (2).