WO2011032543A2

WO2011032543A2 - Self-disinfecting trap

Info

Publication number: WO2011032543A2
Application number: PCT/DE2010/001090
Authority: WO
Inventors: Alexander Schluttig
Original assignee: Alexander Schluttig
Priority date: 2009-09-18
Filing date: 2010-09-20
Publication date: 2011-03-24
Also published as: DE112010003714A5; DE102009042212A1; WO2011032543A3

Abstract

The invention relates to a self-disinfecting trap, comprising a trap body (1), which is composed completely or partially of material that is transparent to ultraviolet light, preferably quartz glass. A source of ultraviolet light (UV lamp) (2b) is attached between the two legs of the trap body (1) and thus enables a maximum irradiation and disinfection of the entire sealing liquid (5). In the trap body (1), at least one device for producing mechanical vibrations (3) is fastened in such a way that said device causes the trap body (1) and the sealing liquid (5) located therein to vibrate, whereby a quick motion of the particles and microorganisms contained in the sealing liquid (5) with very frequent direction changes and thus the avoidance of UV shadow zones is achieved and the adhesion of particles on the inner wall of the trap body is prevented and the formation of dirt films and biofilms is prevented by detaching adhesions and, if ultrasonic frequencies are used, an additional killing of microorganisms is achieved. The self-disinfecting trap can additionally be equipped with a heating device (4) for heating the sealing liquid.

Description

Self-disinfecting odor trap

According to the European standard EN 274-1: 2002, odor traps are considered to be a hydraulic barrier between the shut-off valve of a sanitary appliance (sink, bath, sink, etc.) and the drainage pipe. They prevent the escape of gases from the drainage system into the building, without hindering the drainage of waste water. For this purpose, all odor traps contain a barrier liquid. This barrier liquid is always a remaining portion of the liquid introduced into the dewatering plant via the odor trap in accordance with its determination and function, and therefore also contains the ingredients of the liquid introduced into the washing or rinsing basin.

It is known in the clinical field that odor traps and the barrier fluids contained therein may contain pathogenic microorganisms that escape into the ambient air when the odor trap is used as intended by aerosol formation (for example, Döring et al., 1991, Sissoko et al., 2005).

Odor seals have been described in which the barrier liquid automatically disinfects the interior of the odor trap during operation and without an interruption of the hydraulic blocking function according to DIN 274-1: 2002. These are therefore referred to as "self-disinfecting odor traps." Self-disinfecting odor traps are characterized by the fact that by the action of preferably physical disinfection mechanisms (ultraviolet radiation, heat, ultrasound and combinations thereof) the germ content the odor trap and the barrier liquid contained therein is lowered so much that the Risk of leakage of pathogenic germs is eliminated in the resulting aerosol under normal use.

Clinical long-term studies with self-disinfecting odor traps of different design and equipment have shown that only in such self-disinfecting odor traps, in addition to physical or chemical disinfection principles (heat, ultraviolet light, chemicals) and electromechanical vibrations to prevent the adhesion of lime and dirt particles and microorganisms in the Inner wall of the odor trap can be used, the formation of dirt and biofilms can be permanently prevented. Preventing the formation of biofilms is absolutely necessary for the "self-disinfecting" function (Sissoko et al., 2005), which is a prerequisite for achieving the sterility of the barrier fluids permanently and at any time.

Variants of self-disinfecting odor traps are described, which use the germicidal properties of high temperature (DE 4206901, US 4192988) or ultraviolet radiation in liquids (DE 4206901, DE 4025078 A1, DE 29509210 U1). Developments for cleaning and disinfecting odor traps (so-called siphons) by means of ultrasound are also known (DE 2747992 A1, US 3,175,567). Although the combination of ultraviolet light and ultrasound (DE 295 09 210 U1) is described for the cleaning and disinfection of objects in liquids, but not for the cleaning and sterilization of odor traps. The combination of ultraviolet light and high temperature (DE 42 06 901 A1) is described for the treatment of the sealing liquid in odor traps. The utility model application G 92 02 902.7 describes the use of heat disinfection, electrolytic disinfection and disinfection by means of ultraviolet light in odor traps.

The combination of ultrasound with elevated temperature has also been described for self-disinfecting odor traps (EP 1866485). The same patent also discloses the combination of electromechanical vibrations with heat for the automatic cleaning and disinfection of odor traps. The combination of electromechanical oscillation for automatic cleaning and ultraviolet radiation for disinfecting the barrier liquid is not disclosed. The application of ultraviolet light radiation described in EP 1866485 relates to the air space above the barrier liquid for disinfecting the passage of the odor trap to the drain valve of the sanitary equipment subject.

Initially, the only binding objective function for the development of self-disinfecting odor traps was, until 2005, that of Döring et al. (1991) published that for the release of microorganisms from odor traps by the addition of liquid a minimum concentration of about 10,000 living germs per milliliter of barrier liquid is necessary.

This set the target for the disinfection performance of the devices (at least 5 log levels). However, this killing performance was found to be inadequate in subsequent clinical studies on the use of the devices.

It has been surprisingly found in numerous clinical tests of "self-disinfecting odor trap in sewers" (EP 1866485) based on several hundred individual measurements of bacterial emissions from odor traps in various hospitals in Germany (SISSOKO et al 2004 a, 2004b, and 2005) that in order to achieve the emission safety required for high-risk clinical areas, a permanent and complete on-going kill of microorganisms in the trap liquid must be ensured.

It has been found that the barrier liquid of the odor trap must be completely and constantly germ-free (germ content less than 10 colony-forming units per milliliter of barrier liquid) so that the emission of germ-containing aerosols is prevented completely and at any time (Sissoko et al., 2005). This new target value for self-disinfecting odor traps is therefore one thousand times lower than the current value. The continuous disinfection performance had to be increased by a thousandfold (to at least 8 log levels) during the development of further self-disinfecting odor traps.

This increase in performance can only be guaranteed by a continuous and complete germ killing.

This requirement can not be constantly and fully met by the combination described in EP 1866485 for the following reasons

The continuous disinfection in self-disinfecting odor trap according to EP 1866485 is achieved according to the invention in a variant by means of heat and ultrasound. The application of low-frequency vibrations described above serves to avoid the biofilm formation on the inner wall of the odor trap, but not the germ killing. The described use of ultrasound leads, as is known, to an aerosolization, which is known as the so-called Vernebier effect and used, for example, for room humidifiers. This ultrasound-induced aerosolization takes place in addition to the aerosolization which occurs as intended during the inflow of liquid. It is extremely problematic in the hygienic sense, because before the ultrasound application no or no complete killing of the germs in the sealing liquid took place. Only after several minutes of interaction of heat and ultrasound the necessary disinfecting effect is achieved, which leads to the necessary for the emergence of germ-free aerosols low germ density in the barrier liquid. The application of ultrasound described in EP 1866485 is coupled to a minimum temperature of 50 ° C, but this is not sufficient for killing germs before the ultrasound application. A liquid containing living microorganisms can not be sterilized by heating to a temperature of 50 ° C alone. Therefore it can not be prevented that nucleated aerosols are produced by the ultrasound treatment which starts at this temperature and the resulting Vernebier effect, and that these enter the environment from the odor trap which is intended to be open at all times during use.

The minimum temperature of 50 ° C. disclosed in EP 1866485 corresponds to the experimentally determined minimum temperature at which combined heat-disinfection also kills germs which are only killed above the boiling point of water (100 ° C. at sea level) (spores and spore formers). and for their killing therefore usually and without ultrasound application with elevated pressures, which allow a minimum temperature of 121 ° C, must be worked. be killed. Although in EP 1866485 no necessary energy density of the ultrasound exposure (watts / liter) is given, it is known from practice that this necessary ultrasound energy must be so high that a vibration-induced aerosol formation on the Surface of the thus treated liquid occurs and can not be avoided.

Due to the atomizing effect of the ultrasound, a self-disinfecting odor trap which is partially or not present at the temperatures of 50 ° C. described in EP 1866485 leads to the formation and emission of germ-containing aerosols and thus to a situation that is more hygienic View is extremely dangerous. The results of the self disinfectant odor trap clinical trials of EP 1866485 have led to demands of hospital hygienists for clinical risk areas (e.g., premature delivery intensive care units) that can only be met by a complete continuous heat disinfection which precludes interim infectious aerosol formation during the disinfection process.

In order to ensure this complete continuous disinfection by heat and in combination of heat and ultrasound or low frequency oscillation, a minimum disinfection temperature of 93 ° C in the barrier liquid must be permanently maintained. For frequently used odor traps, this temperature can be ensured only by using a strong, fast heating, which again leads to faster evaporation-induced reduction of the volume of the barrier liquid due to the small volume of barrier liquid, which is about 200 milliliters in standard odor traps. Therefore, self-disinfecting odor traps with heat disinfection must have level control and regulation to comply with DIN EN 274-1: 2002. The level control to ensure the proper function of the odor trap in the disinfection method described in EP 1866485 by heat in combination with ultrasound can only be achieved by the heating remains switched off until the intended minimum volume of the barrier liquid until re-use of the pool drain the Minimum level of the barrier fluid is exceeded again. However, this procedure inevitably entails the following serious uncertainties:

1. If between the level-related shutdown of the heater and reheating longer stoppages occur, as occurs, for example, in unoccupied patient rooms or little use sink, multiply microorganisms that are registered by the air in the barrier liquid of the intended open odor trap in the now cooled germ-free barrier fluid and, since there is no heat loss can take place in the meantime due to low volume, inevitably emitted at the next use before a renewed heat disinfection takes place. 2. If a very small, but very strong germ-containing amount of liquid in the odor trap (eg sputum, blood), without thereby exceeding the necessary for the onset of heating minimum level is exceeded, it does not cause the thermal killing of these germs, but this addition acts like the inoculation of a bacteriological nutrient solution and the introduced microorganisms can then multiply in the barrier fluid. These are then emitted at the next intended use of the odor trap, since prior to this use no thermal disinfection takes place as a result of the insufficient fill level. 3. In the thermal disinfection occur in the entry and exit areas of the self-disinfecting odor trap inevitably and for safety reasons (preventing scalding the user) necessarily zones of reduced temperature (according to the safety regulations with less than 60 ° C), which also only temporarily and not constantly are wetted with liquid. These zones can become areas of preferred propagation of mesophilic and thermophilic pathogens. Because of the only temporary full coverage of these zones with liquid, prevention of biofilm formation is limited by vibration. The pathogens that multiply there are then in turn introduced into the barrier liquid when liquid enters the odor trap, where, after a level-related deactivation of the thermal disinfection, this agent is replicated and then emitted at the next intended use of the odor trap.

This, the required safe function of a self-disinfecting odor trap substantially limiting uncertainties can be eliminated only by an additional, the volume of the barrier liquid during disinfection non-reducing killing method, preferably by irradiation with ultraviolet radiation at room temperature. The prerequisites for a complete and continuous UV germ killing in the sealing liquid of odor traps are:

1.) The barrier liquid volume is penetrated in the required intensity for killing by the ultraviolet radiation, preferably with a wavelength between 276 nm and 300 nm. 2.) The formation of zones behind dirt particles, which are not achieved by UV rays (so-called UV shadows) is ensured by frequent movement of the liquid to be disinfected and the dirt particles and microorganisms contained therein. The permanent and permanent prevention of these shadow zones is a requirement resulting from the high propagation rate of microorganisms. This can only be achieved with a very frequent, constantly changing direction of movement of these particles while preventing the settling of the particles on the inner wall of the odor trap.

For this purpose, the barrier liquid can be set in motion in various ways. The movement of the barrier liquid can be done mechanically by pumping, stirring, etc. The invention described herein is based on laboratory and practical investigations, in which a fast (for example, 100 Hz), the direction of movement of the barrier fluid, which is caused by a mechanical vibration very often proved to be particularly effective.

According to the results of experimental work in the development of self-disinfecting systems, all technical solutions described so far have the following main functional and technical disadvantages, which lead to a safety risk in the application:

1. Odor seals in which only the UV irradiation was used for disinfection, showed after a short time occupancy of the inner wall of the odor trap and - if the UV radiation source was introduced directly into the barrier liquid - and the outer wall of the UV irradiation source itself. This effect has long been known in wastewater treatment with UV light (eg in the treatment of landfill leachate) and therefore a number of apparatus have been developed for cleaning the outer walls of UV lamps.

The occupancy of the inner wall of the odor trap and the wall of the radiation source with microscopic dirt particles leads to reduced or prevented penetration of the odor trap interior and the barrier liquid with ultraviolet light, so that the UV light does not reach the barrier liquid in the dose required for a reliable disinfection. This leads to insufficient killing of germs, which in turn the gain of the mucus layer (biofilm) is achieved. This biofilm formation then in turn leads to a reduction in the intensity of the UV radiation in the barrier liquid, so that it comes with the sole use of UV light after some time to malfunction of the disinfection apparatus. This effect is known and feared in the hygiene practice of water sterilization with ultraviolet light.

2. When attaching a microorganism-populated dirt particle to the inner wall of the odor trap, parts of the particle are not reached by the UV radiation. The result is the so-called UV shadows, which are feared in disinfection. The bacteria in the UV shadow area multiply and enter the free barrier liquid. In the barrier liquid, a time of several minutes, depending on the UV dose, is needed to kill the bacteria with ultraviolet light. If the siphon is used within this critical time, living germs will be emitted. The function of the self-disinfecting odor trap is thus not always guaranteed. 3. The irradiation with ultraviolet light without additional facilities of cleaning therefore always leads to three major effects in the wastewater sector:

1. to the primary occupancy of the inner wall with lime and microbial populated dirt particles

2. The resulting formation of UV shadows in which microorganisms multiply and

3. Thus, to the reduced killing of living microorganisms in the barrier fluid due to reduced ultraviolet radiation

These factors in turn lead to an initially ineffective efficacy of the disinfection of the odor trap with ultraviolet light and thus completely eliminate the advantages of this disinfection method over the heat disinfection.

These adverse effects of using ultraviolet light alone to disinfect liquids or objects in liquids are well known in the hygiene practice and are also an important reason for favoring heat disinfection over ultraviolet light disinfection.

The prevention of the formation of UV shadows is most effective in the low volume of the barrier liquid to be treated with a very rapid, constantly directional movement of the liquid mass and thus the particles contained therein. This is accomplished by a mechanical vibration. This prevents, when it is introduced through the wall of the odor trap, by the vibration of the wall of the odor trap and the settling of the particles on the siphon wall. For this purpose, the barrier liquid is vibrated, but their frequency is so it is low that no nebulization, as it is observed when using ultrasound, occurs.

The continuous disinfection of odor closures with ultraviolet light has other significant advantages over thermal disinfection:

1. no dehydration due to evaporation or evaporation

2. immediate effect of ultraviolet light in the minute range, no time-consuming heating up to

Achieving the kill temperature necessary.

3. permanent guarantee of the function of the odor trap, in particular in the case of drains which are exposed to high solids load, in that there is no blockage due to thermal drying out.

As technical advantages in the commercial use and the application of ultraviolet radiation, a low tax and regulatory burden is seen. For commercial use of the invention is therefore assumed in UV disinfection with coupled cleaning by mechanical vibration of lower production costs, which in turn can promote the spread of this hygiene measure. In addition, a much lower energy consumption during operation compared to thermodisinfection. For thermal disinfection, up to 20 liters of barrier fluid must be heated to 93 ° C and kept at this temperature every 24 hours for frequently used sinks, whereas only 10-20% of this energy is required for UV disinfection. Another commercial advantage over thermal disinfection is the minimized maintenance: during thermal disinfection limescale deposition

inevitably promoted by evaporation losses. Because the Level control by means of silver contacts, which can calcify at different speeds depending on the water hardness - ie not calculable - additional safety measures and signal functions are necessary.

The object of the invention is therefore to describe an odor trap with means for automatic cleaning and disinfection, a so-called self-disinfecting odor trap, which does not have the aforementioned disadvantages of all known in the prior art solutions.

The object of the invention is achieved by the self-disinfecting odor trap to be described below.

The apparatus according to the invention of the self-disinfecting odor trap consists of an odor trap of known design according to EN 274-1: 2002 (sink siphon, wall siphon, floor drain, bath siphon, odor trap in the toilet bowl, trap in pissoire - basin, odor closures in hospital sinks) (1) with at least one source of ultraviolet light (2a and 2b) and at least one device for generating and transmitting mechanical vibrations (3), the controlled interaction of which leads to constant and complete sterility of the self-disinfecting odor trap and the sealing liquid (5) contained therein.

Reference to the following embodiments, the invention will be described in more detail. Embodiment 1

In Fig.1a a self-disinfecting tube odor trap is shown, consisting of an odor trap body (1), which consists wholly or partly of ultraviolet light transmissive material, preferably quartz glass. The source of ultraviolet light is a mercury-vapor lamp (UV lamp) (2b). This is mounted between the two legs of the odor seal body (1) and thus allows maximum irradiation and disinfection of the entire barrier liquid (5).

At least one vibrating cleaner (3), consisting of a device for generating mechanical vibrations, preferably an electromechanical vibrating magnet, an unbalance motor or an ultrasonic vibrator, is attached to the odor trap body (1) in such a way that this vibrating cleaner (3) seals the odor trap body (1) and the The barrier liquid (5) contained therein vibrates, which achieves both a fast movement of the particles and microorganisms contained in the barrier liquid (5) with a very frequent change of direction and thus the avoidance of UV shadow zones, as well as the adhesion of particles to the interior wall of the membrane Odor trap body and by removing adhesions, the dirt and biofilm formation is prevented and in the case of the use of ultrasonic frequencies, an additional kill of microorganisms is achieved.

In Fig. 1b, a self-disinfecting tube odor trap according to Fig. 1a is shown, which is additionally equipped with a heater (4) for heating the barrier liquid. Embodiment 2

In Fig. 2a is a self-disinfecting tube odor trap, consisting of an odor trap body (1), which is made of any material, preferably brass or plastic, shown. The source of ultraviolet light is one or more UV LED lights (2a). These are integrated into the odor trap body (1) so that the entire barrier liquid (5) is irradiated with ultraviolet light.

At least one device for generating mechanical vibrations (3) is attached to the odor-sealing body (1).

FIG. 2b shows a self-disinfecting tube odor trap according to FIG. 2a, which is additionally equipped with a heating device (4) for heating the barrier liquid (5).

Embodiment 3

In FIG. 3a (side view) and 3b (top view), a self-disinfecting tube odor trap is shown, consisting of an odor-trap body (1) which consists wholly or partly of material permeable to ultraviolet light, preferably quartz glass. The source of ultraviolet light is an annular mercury-vapor lamp (UV lamp) (2b). This completely surrounds the odor-sealing body (1) and thus enables maximum irradiation of the entire barrier liquid (5).

At least one device for generating mechanical vibrations (3) is attached to the odor-sealing body (1). Embodiment 4

FIG. 4a shows a self-disinfecting bottle odor trap consisting of an odor-sealing body (1) in bottle form made of any material into which a mercury vapor lamp (UV lamp) (2b) serving as a source of ultraviolet light is introduced in such a way that maximum irradiation is achieved the barrier liquid (5) is reached.

At least one device for generating mechanical vibrations (3) is attached to the bottom or to the side wall of the odor-sealing body (1).

FIG. 4b shows a self-disinfecting tube odor trap according to FIG. 4a, which is additionally equipped with a heating device (4) for heating the barrier liquid.

Exemplary Embodiment 5 A self-disinfecting bottle odor trap is shown in FIG. 5a, consisting of an odor-sealing body (1) in bottle form of any material, in the wall of which ultraviolet light sources LED UV lamps (2a) are introduced in such a way that maximum irradiation is achieved the barrier liquid (5) is reached.

FIG. 5b shows a self-disinfecting tube odor trap according to FIG. 5a, which is additionally equipped with a heating device 4 for heating the barrier liquid. Embodiment 6

In Fig. 6a (side view) and 6b (top view), a self-disinfecting bottle odor trap is shown, consisting of an odor-closure body (1), which consists wholly or partly of ultraviolet light-permeable material, preferably quartz glass. The source of ultraviolet light is an annular mercury-vapor lamp (UV lamp) (2b). This completely surrounds the odor-sealing body (1) and thus permits maximum irradiation of the barrier liquid (5).

Embodiment 7

FIG. 7 shows a self-disinfecting odor trap in the form of a floor drain of a known type, consisting of a two-part odor trap body (1) made of any desired material. The source of ultraviolet light is a mercury-vapor lamp (UV lamp) (2b). This is attached to the bottom of the odor trap body (1) and thus allows maximum irradiation of the entire barrier liquid (5) by immersing in this.

At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1). The self-disinfecting odor trap in the design of a floor drain can additionally be provided in the upper part with a heat source, preferably an infrared heat source (4a), which provides heating of the barrier liquid when needed. Embodiment 8

FIG. 8 shows a self-disinfecting odor trap in the form of a floor drain of a known type, consisting of a two-part odor trap body (1) made of any desired material. The sources of ultraviolet light (2a and 2b) are both a mercury vapor lamp (UV lamp) (2b) and several UV LED lamps (2a). This mercury vapor lamp (UV lamp) (2b) is attached to the bottom of the odor trap body (1), the UV LED lights (2a) are integrated in the cover of the odor trap in the design of a floor drain. At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1). At least one additional mechanical vibration generating device (3) is mounted in the odor trap cover.

Embodiment 9

FIG. 9 shows a self-disinfecting odor trap in the form of a floor drain, consisting of a two-part odor trap body (1) made of any desired material. The source of ultraviolet light is one or more UV LED lights (2a). The mechanical vibration generating device (3) in this embodiment is fixed to the inner cover (8) which is part of the two-piece odor seal body (1). Embodiment 10

In Fig.10a a self-disinfecting wall odor trap is shown, consisting of an odor trap body (1) with lateral inlet area (6). The source of ultraviolet light is a mercury-vapor lamp (UV lamp) (2b).

At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1). In Fig.10b a self-disinfecting wall odor trap is shown, consisting of an odor trap body (1) with side inlet area (6), serve as a source of ultraviolet light here one or more UV LED lights (2a). At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1).

The self-disinfecting odor trap in the form of a wall odor trap can additionally be provided in the upper part with at least one heating device (4), preferably an infrared heating source (4a), which provides heating of the barrier liquid when needed.

In Fig.10c, a self-disinfecting wall odor trap is shown, consisting of an odor trap body (1) with lateral inlet area (6), serve as a source of ultraviolet light here one or more UV LED lights (2a).

At least one device for generating mechanical vibrations (3) is in this case attached to the outlet connection (9) of the odor sealing body (1). Embodiment 11

FIG. 11 a shows a self-disinfecting bath or shower tray odor trap in an extremely flat design, comprising an odor trap body (1) with inlet area (6). The source of ultraviolet light is a mercury-vapor lamp (UV lamp) (2b).

At least one device for generating mechanical vibrations (3) is fastened to the upper side wall of the odor sealing body (1).

FIG. 11b shows a self-disinfecting bath or shower tray odor trap in an extremely flat design, consisting of an odor trap body (1) with inlet area (6). The source of ultraviolet light is one or more UV LED lights (2a).

At least one device for generating mechanical vibrations (3) is fastened to the lower side wall of the odor-sealing body (1).

Embodiment 12

12 shows a self-disinfecting odor trap in a sink, a so-called hospital or stool nozzle, consisting of an odor trap body (1) with inflow area (6). The source of ultraviolet light is at least one mercury vapor lamp (UV lamp) ( 2 B).

At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1). Embodiment 13

13 shows a self-disinfecting odor trap in a toilet bowl, consisting of an odor trap body (1) with inlet area (6). The source of ultraviolet light is at least one mercury vapor lamp (UV lamp) (2b).

At least one device for generating mechanical vibrations (3) is attached to the side wall of the odor-sealing body (1).

LIST OF REFERENCE NUMBERS

Trap body

Source of ultraviolet light, UV LED light

Source of ultraviolet light, mercury vapor lamp (UV lamp)

Device for generating mechanical vibrations

heater

Heating source infrared emitter

sealing liquid

intake area

discharge area

cover

outlet connection

Claims

claims

1 . Self-disinfecting odor trap, characterized in that an odor trap of known type and the barrier liquid contained therein is irradiated and disinfected by at least one source of ultraviolet light and are brought by a device for generating mechanical vibrations of the odor trap body and the barrier liquid therein vibration.

2. Self-disinfecting odor trap according to claim i, characterized in that the device for generating mechanical vibrations generated mechanical vibrations in a frequency range of 1 to 200,000 Hz and these vibrations are transmitted to the interior of the odor trap and the barrier liquid therein.

3. Self-disinfecting odor trap according to claims 1 and 2, characterized in that the inner wall of the odor seal body is provided with a hydrophobic or antimicrobial coating.

4. Self-disinfecting odor trap according to one of the preceding claims, characterized in that the odor trap is equipped with a device for generating high temperatures inside the odor trap.