Patent Publication Number: US-11033160-B2

Title: Flushing and cleaning system and flushing method for a toilet

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a U.S. National Stage Application of International Application No. PCT/DE2017/000102 filed Apr. 10, 2017, which designates the United States of America, and claims priority to DE Application No. 10 2017 001 775.1 filed Feb. 20, 2017, the contents of which are hereby incorporated by reference in their entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to toilets. Various embodiments may include flushing and cleaning systems and/or flushing methods for a toilet. 
     BACKGROUND 
     In typical flushing devices for toilets, water is mainly or exclusively used as the flushing agent. Flushing pressure is generated by gravity. Due to environmental considerations the consumption of potable and/or drinking water for flushing toilets is not desirable. Therefore, the search for alternatives makes sense. 
     In order to save water during the flushing process, some systems use compressed air in addition to water for flushing. DE 25 19 620 C3 (“toilet device for railway cars”) describes a toilet device for railway cars, wherein between a fresh water tank and the toilet bowl an intermediate container is arranged, from which, when a pedal is actuated, controlled by a time relay a quantity of fresh water is pressed into the toilet bowl by means of stored compressed air. This causes a flushing of the toilet bowl with a reduced amount of water, so as not to have to empty the sewage tank of a train too often. However, the system still does not work without a considerable amount of water. Currently, about 6 to 9 liters of drinking water are used for a flushing process. 
     Another consumer demand related to toilet use is hygiene. Especially in public areas such as train stations, airports, restaurants, etc., it is desirable to find a clean toilet seat or to be able to resort to a way that allows a hygienic use of the toilet seat in use. Covers of toilet seats with paper pads are used to avoid or at least minimize the direct contact of the human body with the toilet seat. This can cause a problem in that the paper pads slip away, as they do not have a hold on the toilet seat and are difficult to rinse off with a water rinse, as they adhere to the interior of the toilet bowl, especially when moistened by the water rinse. 
     In this respect, DE 39 16 371 A1 describes a “toilet add-on device—compact and adaptable as a paper covering reservoir comprising an automatic application technique, as well as fecal odor extraction and water wetting the toilet bowl.” Here rosette-shaped paper coverings can be placed on a toilet seat ring. The paper covering is taken from a store device. The paper is fixed under negative pressure or vacuum on this toilet seat ring. The flushing is done by a water flush in combination with a suction of air. However, only smooth paper variants are suitable, otherwise it must be sucked in with greater vacuum power. Torn or damaged paper pieces no longer adhere to the toilet seat ring, since the pressure is then no longer sufficient. In addition, the known solutions are technically complex. However, such devices are vulnerable to failures. Therefore, they are particularly inappropriate for public toilets that are designed for high numbers of users. 
     SUMMARY 
     The teachings of the present disclosure describe flushing and cleaning systems that allows a hygienic use of a toilet and at the same time provides environmentally sound cleaning. For example, some embodiments include a flushing and cleaning system ( 100 ) for a toilet device, comprising a toilet bowl ( 10 ) and at least one toilet seat ( 14 ,  16 ) and a toilet lid ( 12 ), characterized in that the flushing and cleaning system ( 100 ) comprises a cleaning space ( 24 ), which is formed separately from the space in which the toilet bowl ( 10 ) is arranged and in which the at least one toilet seat ( 14 ) or in the arrangement of two toilet seats ( 14 ,  16 ) each one of the two toilet seats ( 14 ,  16 ) can be arranged for cleaning purposes. 
     In some embodiments, the toilet seat or the toilet seats ( 14 ,  16 ) are designed to be movable so that they are movable into the cleaning space ( 24 ) and out of the cleaning space ( 24 ) by a moving device. 
     In some embodiments, the toilet seat or the toilet seats ( 14 ,  16 ) are formed rotatable into the cleaning space ( 24 ) and out of the cleaning space ( 24 ) by the moving device, which is designed as a rotating device. 
     In some embodiments, when the toilet device is not in use the toilet lid ( 12 ) completely closes the toilet bowl ( 10 ) and for using the toilet device the toilet lid ( 12 ) is movable into a storage position. 
     In some embodiments, at least two cleaning nozzles ( 26 ) are arranged in the cleaning space ( 24 ) so that the toilet seat ( 14 ,  16 ) can be sprayed in the cleaning space ( 24 ) from two different, opposite sides. 
     In some embodiments, at least two drying nozzles are arranged in the cleaning space ( 24 ) so that the toilet seat ( 14 ,  16 ) can be flushed with air for drying from two different, opposite sides. 
     In some embodiments, the cleaning space ( 24 ) has at least one waste water collecting vessel ( 38 ). 
     In some embodiments, the medium collected in the sewage collecting vessel ( 38 ) has a pressure inlet ( 40 ) towards the waste water of the toilet bowl ( 10 ). 
     In some embodiments, the waste water of the toilet bowl ( 10 ) and/or the cleaning space ( 24 ) can be discharged into the drainage pipe ( 48 ) by the addition of compressed air from compressed air nozzles ( 56 ,  58 ,  60 ,  62 ). 
     In some embodiments, the toilet lid ( 12 ) is formed in one or two parts and is foldable, slidable, pivotable or rotatable. 
     In some embodiments, the cleaning space ( 24 ) has a separator plate ( 28 ) and at least one seal ( 30 ). 
     As another example, some embodiments include a method for flushing and cleaning a toilet as described above, characterized by the steps of: a) opening a toilet lid ( 12 ), b) changing the position of the toilet lid ( 12 ) either into a space below a cleaning space ( 24 ) in an area between the cleaning space ( 24 ) and a waste water collecting vessel ( 38 ) or moving to a position next to a toilet bowl ( 10 ), c) after the toilet has been used, moving the used toilet seat ( 14 ,  16 ) into the cleaning space ( 24 ), d) cleaning the toilet seat ( 14 ,  16 ), and e) at the same time moving out the toilet lid ( 12 ), f) covering the toilet bowl ( 10 ) with the toilet lid ( 12 ), g) introducing compressed air through at least one nozzle ( 44 ,  50 ), h) flushing the toilet bowl ( 10 ) with the compressed air with or without supply of water, and i) introduction of rinsing goods into a drainage pipe ( 48 ). 
     In some embodiments, the cleaning space ( 24 ) has a waste water collecting vessel ( 38 ) which is filled with waste water of the cleaning process and whose waste water is discharged together with the waste water of the toilet bowl ( 10 ). 
     In some embodiments, two toilet seats ( 14 ,  16 ) are used and for cleaning in each case a toilet seat ( 14 ) or a toilet seat ( 16 ) is cleaned in the cleaning space ( 24 ), while the other toilet seat ( 14 ,  16 ) is arranged on the toilet bowl ( 10 ) and is free for use. 
     In some embodiments, the flushing process and the discharge of the rinsing goods into the drainage pipe ( 48 ) is supported by the introduction of compressed air from compressed air nozzles ( 56 ,  58 ,  60 ,  62 ). 
     In some embodiments, in the cleaning space ( 24 ) disinfectant, cleaning agents, fragrances or other additives are added to the cleaning water. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       An example embodiment of the teachings of the present disclosure is explained in more detail below with reference to the attached schematic drawings, wherein: 
         FIG. 1  shows a flushing and cleaning system incorporating teachings of the present disclosure, comprising a changeover mechanism and use of compressed air flushing viewed from the side, 
         FIG. 2  shows a flushing and cleaning system with a variant of the valve arrangement incorporating teachings of the present disclosure also viewed from the side, 
         FIG. 3  shows a flushing and cleaning system incorporating teachings of the present disclosure in a frontal view, 
         FIG. 4  shows a toilet bowl incorporating teachings of the present disclosure with pressure-forming valves in a side view, 
         FIG. 5  shows a toilet bowl incorporating teachings of the present disclosure with water as a transport medium viewed from the side, 
         FIG. 6  shows a rotary unit for toilet seats incorporating teachings of the present disclosure viewed from the side, and 
         FIG. 7  shows the rotary unit of  FIG. 6  with a seal viewed from the side. 
         FIG. 8  shows an example system incorporating teachings of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Various embodiments of the teachings herein include flushing and cleaning systems and/or flushing methods for toilets in which a closed overpressure system is used as flushing agent for the removal of feces. In particular, the energy used is taken from the flushing cistern, which serves as an energy storage system to provide the overpressure and generate pressure differences. This overpressure is easily generated and made available. Usually it is already present in the water supply network. The compressed air flushing is combined with a cleaning process that allows reliable cleaning of a toilet seat after use. 
     In some embodiments, the flushing and cleaning system comprises several modules. These individual modules together form the flushing and cleaning system. The flushing and cleaning process includes a changeover mechanism and a cleaning space separate from the toilet bowl. 
     In some embodiments, the toilet bowl is arranged on a wall or a stem in front of the wall of a wet room or a bathroom. It may be adjustable in height and also be designed as a urinal or be designed in a special design for people with reduced mobility. It may be formed in a round, angular or spherical manner or the like. In some embodiments, the toilet bowl has a nearly hermetically closable toilet lid. The toilet bowl together with the toilet lid forms a closed device. 
     This toilet lid is placed in a storage space behind the toilet bowl, either in the wall or in a stem between the wall and the toilet bowl, or otherwise removed from the toilet bowl during use of the toilet and covers the toilet bowl when not in use. In a covered state it is arranged in an area below the toilet seat and is movable into the storage space in its position for storage and then again is movable out of there for closing or covering the toilet bowl. The toilet lid may be pushed, folded, swiveled or the like and may be formed, for example, in two parts or hemispherical. If it is formed in two parts, it can be unfolded by opening the two halves on both sides. 
     In some embodiments, one or more toilet seats may be placed on the toilet bowl. In some embodiments, the second toilet seat is provided as a reserve seat. It can be cleaned when the other toilet seat resting on the toilet bowl is in use and is then made available to another toilet user in the cleaned state, while at the same time, or only slightly later, the other toilet seat is subjected to a cleaning process. The usage depends on the frequency of use. The toilet seat may also be electrically heated. 
     In some embodiments, a cleaning method includes moving a toilet seat into a cleaning space. In particular, it can be folded, pivoted, and/or rotated. Cleaning takes place inside the cleaning space without contamination by vapors. The resulting used air is sucked off and condensed. This may be done via an exhaust condenser. The exhaust condenser, in some embodiments, may be arranged laterally to take up little space. The vapors may be removed into the appropriate lines via a fan. Any resulting condensation may be drained off through the drainage. 
     In some embodiments, any exhaust air from the toilet bowl is aspirated at the same time. Disinfection may be carried out by additives, e.g., disinfectants. Cleaning and care additives can be exactly metered. These may be decalcifiers, fragrances, disinfectants, water softeners, etc. The toilet seat can be dried with air with or without a fan. 
     In some embodiments, the cleaning space is formed behind the rear wall on which the toilet bowl is arranged. The existing space in conventional concealed flushing cisterns usually is sufficient. The cleaning space is accessible from the front, from where the toilet is located. Fixation and sealing may be achieved by means of seals. These form a cover with the rear wall. The seals may, for example, close from the sides and thus enable a fixation, sealing as well as the space for rotating the toilet seat. 
     This rotation in particular may be done using a rotary unit. It performs a rotational movement and rotates by 180°. The back wall behind the toilet bowl thus forms a cover for the cleaning space. Thus, the cleaning space is closed. The toilet seat may be folded up and moved into the cleaning space by a transport device. It may be rotated by the rotating device by 180°. Then a cleaning process takes place. Therefore, there is no waiting time during the cleaning process for the user of the toilet, since the other, already cleaned toilet seat is rotated by 180° forward for use from the rear out of the cleaning space. The user may use the toilet unhindered. The usage time therefore corresponds to the cleaning time if two toilet seats are available. Thus, a turning unit, in some embodiments a rotary unit, is used for the cleaning process. 
     In some embodiments, the toilet seat may be cleaned from the front and from the back inside the cleaning space. To do so, water or detergent jets may be directed against each other. Water may be removed from the surfaces at the same time and the water is discharged into the container provided for this purpose. Drying may also be done on both sides. 
     In some embodiments, during the cleaning process, water is collected, and the toilet bowl is vented in a controlled manner. The pressure accumulator is filled in particular with the water from the cleaning process. Pressure is built up in the previously unpressurised water storage device by inflowing water. The toilet lid closes. The pressurized wastewater flows through a separate line into a drainage pipe. In the wastewater space negative pressure is created. Any resulting coarse dirt particles are separated during cleaning in a coarse dirt collector and directed into the drainage system separately. 
     In some embodiments, the water or the liquid used for the cleaning process can be used as a support for the flushing process. The water or cleaning agents required for cleaning the toilet seats otherwise flow into a collecting container after the cleaning process. This container captures the accumulating wastewater, cleaning agents, descaler, disinfectants, fragrances, and the like. This mixture of liquid substances may be discharged via the house management or also may be introduced into the domestic drainage via a pumping system. Cleaning nozzles may be arranged in the interior of the toilet bowl. 
     In some embodiments, when two toilet seats are in use, one toilet seat is arranged in a space in the wall, in particular the cleaning space, or is arranged in the corresponding stem. To use the toilet, the toilet lid—whether triggered automatically or manually—may be moved, e.g., folded, pushed, pivoted, unfolded, or the like, and the other toilet seat is moved at about the same time from the storage space onto the toilet bowl and is placed on the edge of the toilet bowl. This can be done by moving the toilet seat into its position by means of a rotary movement. 
     After the usage the toilet seat is again brought into the space provided and there it is subjected to cleaning. There must be at least one toilet seat, but there may also be one or more additional toilet seats in stock to be replaced if necessary and to subject the respective toilet seat not in use to a cleaning process. The toilet seat is designed to fully enclose the upper portion of the toilet bowl so that nothing can splash outward from the toilet bowl. 
     In some embodiments, during the flushing process the overpressure is synchronously introduced into the closed toilet bowl and into the discharging supply line. The overpressure is thus derived from the flushing cistern. The medium flowing quickly into the disposal line, e.g. liquid and air, creates a negative pressure downstream of the inflowing point according to the principle of a venturi nozzle and thus sucks in the contents of the bowl. The overpressure generated in the toilet bowl increases the pressure difference and moves the bowl contents towards the disposal line. 
     With the overpressure method, this energy impact can be used to empty the toilet bowl. Only the smallest amounts of water are needed and a variant without water use is also provided. In some embodiments, 100 ml of liquid and 0.2 bar of overpressure are provided for the discharge. By means of the closure of the toilet bowl with the toilet lid when flushing no contaminated germs or water vapor penetrate into the room air. This improves the flushing process. 
     In some embodiments, the flushing process only takes place if sufficient pressure is built up. As soon as the toilet lid is closed, there is sufficient energy, e.g. overpressure in the pressure accumulator, so that emptying the toilet bowl without any further energy source is possible. If several rinses are necessary, the reservoir is filled and overpressure is generated, or this can possibly be generated alternatively by means of a hand pump. This is also a variant that is applicable in states with energy supply problems. Operation of the flushing and cleaning system is therefore possible without connection to other detergent sources. For discharge into the pipe system also supplied water or, for example, a gas mixture in the pipe system behind the toilet bowl may be used. A thus resulting negative pressure before the introduction creates a greater pressure difference between the toilet bowl and the pipe system, sucks the medium out of the toilet bowl and supplies the energy for transport within the pipe system to the downpipe. Therefore, older and longer drainpipes are further usable. 
     A flushing and cleaning system incorporating the teachings herein thus enables a waterless variant. If, for example, a paper insert is placed in the toilet bowl as a sliding medium so that the feces do not touch the edge of the bowl, the principle of a “pneumatic tube” is created, which can transport the contents even anhydrous into the pipeline network. A following processing of the feces is much simpler as there is no need to separate water. When introducing the feces into a transport container the volume is reduced to the amount of fecal matter. The “paper” is formed of a material that is especially formed from natural materials such as straw. This material, together with the feces, can be heat treated as a high-quality fertilizer and may be used immediately. 
     To accommodate the items to be washed, i.e. the fecal matter and the paper covering and used toilet paper, a disposal container is required in the waterless variant. This may be a disposable or a reusable container and is supplied to a collection. The contents are disposed of separately or can be processed into a fertilizer, for example. The included paper of the paper covering, and the toilet paper have been compressed during the flushing process by the compressed air with the overpressure. 
     A flushing and cleaning system incorporating teachings herein may also allow for a variant of flushing with water. The need for comfort of people becomes increasingly extensive. Water plays a central role in this context. This is also the case with toilet hygiene. Water plays a central role. At the same time, however, water is becoming an increasingly scarce resource. It is therefore desirable to use water no longer primarily as an energy medium. The saving of water in the toilet flushing in the known manner, however, could cause a silting or pollution of the pipeline network with significant follow-up costs. By using the flushing and cleaning systems described herein, the water of the toilet cleaning can be used for transport within the pipeline network and creates the possibility to further reduce the amount of water in the flushing water. Even in long or difficult old pipeline networks, a discharge is possible, even if the flushing water quantities are getting increasingly lower. The existing pipeline network remains intact. 
     The compressed air also usable for flushing—for the waterless as well as for the water-using variant—can be generated in particular for itself or in combination with the water pressure by compressing air with a compressor. The compressed air may then be stored in a pressure vessel. However, the pressure may also be generated by means of other alternatives, such as hot water (steam), mechanical (pump), mechanical (water pressure from the supply network), electric (compressor), hydraulic (pump) or with spring force by biasing, compressed gas, gas mixtures, or by solar energy. 
     In a simpler home version, for home use or for use in restaurants, only one toilet seat is used, which is cleaned after each use. For a reliable flushing of the toilet bowl no further rinses are required when using compressed air. 
     A flushing and cleaning system incorporating teachings of the present disclosure, requires only little or no fresh water or drinking water for flushing and thus the flushing and cleaning system forms an environmentally friendly device. The cleaning allows a hygienic and clean toilet use with an always freshly cleaned toilet seat. Further advantages and advantageous embodiments of the teachings herein can be taken from the following description of the figures, the drawings and the claims. 
     In  FIG. 1 , a flushing and cleaning system  100  is shown. A toilet bowl has a toilet lid  12 . Furthermore, a first toilet seat  14  and a second toilet seat  16  are formed. The toilet seats  14 ,  16  are formed lowerable by a lowering unit  18 . Below the first toilet seat  14 , a washing nozzle  20  is formed. Within the toilet bowl, a first cleaning nozzle  22  is formed. 
     Separated from the space in which the toilet bowl  10  is arranged, a cleaning space  24  is arranged. The cleaning space  24  has second cleaning nozzles  26  and a separator plate  28 . The separator plate  28  is sealed with seals  30 . At the cleaning space  24 , an exhaust condenser  32  is arranged. Within the cleaning space  24 , at least one guide  34  is formed for the cleaning devices, for example for the water spray devices or drying devices. 
     The cleaning space  24  has a diaphragm valve  36 . Furthermore, a wastewater collecting vessel  38  is formed, which has a pressure feed  40 . A feed line reservoir  42  is formed. Furthermore, a first shut-off valve  44  and a drain  46  for the sewage collecting vessel  38  are formed. The drainage takes place via the drainage pipe  48 . In  FIG. 2 , in addition to the features shown in  FIG. 1  a shut-off valve  52  is formed for the sewer tank  38 . The illustrated discharge takes place directly into the odor trap. The discharge may be designed differently. 
       FIG. 3  shows a frontal view of the toilet bowl  10  comprising the toilet lid  12  and the toilet seat  14 . Also shown is the washing nozzle  20  and the lowering unit  18 . Within the toilet bowl  10 , the first cleaning nozzle  22  is shown. The cleaning space  24  has seals  30  and second cleaning nozzles  26 . An exhaust air condenser  32  is arranged laterally in the cleaning space  24 . Therefore, the drain  54  of the exhaust condenser  32  is formed at the lower end thereof.  FIG. 4  illustrates the toilet bowl  10  and the drainage pipe  48 . To generate a compressed air surge or the compressed air regulation, respectively, in particular a first nozzle  56  and a second nozzle  58  are formed. In some embodiments, a cylindrically symmetrical flow of the supply air is guided through a short constriction, so that an increase in pressure takes place. For ideal gases, the extended Bernoulli equation applies. When the flow reaches the speed of sound, the Venturi nozzle becomes a Laval nozzle. Due to the achieved compressed air surge, the run-off of the wastewater-air mixture is greatly facilitated. 
     In  FIG. 5 , the variant of  FIG. 4  comprising water as a transport medium into pipeline networks comprising long distances or bad lines is shown. Further nozzles  60 ,  62 , e.g., Venturi nozzles, may be arranged for the inclusion of compressed air or water mixture in the wastewater. This application prevents deposits and constrictions in the pipeline system and allows for better drainage. 
       FIG. 6  is a detailed view of a rotary unit  200 . The toilet seats  14  and  16  can be rotated by 180° by means of this rotation unit  200  about a rotation axis  64  and thereby be transported into the cleaning space  24 . The cleaning space  24  (indicated by dashed lines) is separated from the space in which the toilet bowl  10  is arranged by the separator plate  28 . The lowering units  18  are formed identical in this embodiment and may operate independently. In this embodiment, two toilet seats  14 ,  16  are shown. However, also only one toilet seat  14  may be arranged, which can be rotated into the cleaning space  24  in the same way by rotation unit  200 . To clean the toilet system, the toilet seat  14  is placed on the toilet bowl  10 . The toilet seat  14  has a splash guard  66  on its underside, the toilet seat  16  a splash guard  68 . This splash guard  66 ,  68  is formed to exactly fit the shape of the toilet bowl  10 . As a result, there is no gap or clearance between the respectively placed toilet seat  14 ,  16  and the toilet bowl  10 . The spraying onto the underside or even the spraying to the outside during the cleaning function, during a shower function or the toilet use is prevented. 
     Ventilation of the toilet bowl  10  is effected by supply air, which is introduced by air channels  14 ,  16  arranged in the toilet seat. As a result, no spraying to the outside is possible. When the toilet seat  14  is lowered, the washing nozzle  20  enters between the toilet seat  14  and the toilet bowl  10 . For the lowering process a motor  74  is arranged. Furthermore, a motor  76  for the washing nozzle  20  is arranged. Motors are also provided for the toilet seat  16 , namely the motor  78  for the lowering of the lowering unit  18  and the motor  80  for a washing nozzle  82 . The toilet seats  14 ,  16  each have facilities for a seat heater. These are the heaters  84  of the toilet seat  14  and  86  of the toilet seat  16 . 
     As an alternative to the illustrated rotating mechanism, other moving devices may be used to facilitate the movement of the toilet seat or seats  14 ,  16  into the cleaning space  24 . These are pivoting, sliding, hinged or differently designed devices or methods for transporting the toilet seats  14 ,  16 . 
     On the rotation axis  64  of the rotation unit  200 , a water inlet  88  is arranged. Also located there is the electrical supply line. The cleaning of the toilet seats  14  and/or  16  takes place after their movement or displacement into the cleaning space  24 . 
     In  FIG. 7 , the cleaning space  24  of  FIG. 6  is shown. A seal  90  is arranged for sealing. The arrangement of the individual devices in the form described causes that all parts coming into contact with the toilet user can be cleaned. Thus, no more washing nozzles are arranged within the toilet bowl. This was and is considered as unpleasant and unhygienic by the toilet user. Likewise, by the arrangement according to the invention a spurting of liquids and the like under the toilet seat  14 ,  16  is reliably prevented during cleaning and/or use. By cleaning the toilet bowl  10  according to the invention on the one hand and the reliable, hygienic cleaning of the toilet seats  14 ,  16 , the cleaning effort in care, hospital, restaurant and other applications is significantly reduced. 
       FIG. 8  shows an example system  100  incorporating teachings of the present disclosure. 
     LIST OF REFERENCE NUMBERS 
     
         
           10  toilet bowls 
           12  toilet lids 
           14  first toilet seat 
           16  second toilet seat 
           18  lowering unit 
           20  first wash nozzle 
           22  first cleaning nozzle 
           24  cleaning space 
           26  second cleaning nozzle (s) 
           28  separating plate 
           30  seal 
           32  exhaust condenser 
           34  guide cleaning 
           36  diaphragm valve 
           38  wastewater collection vessel 
           40  pressure feed 
           42  feed line reservoir 
           44  first shut-off valve 
           46  process 
           48  drainage pipe 
           50  supply/exhaust air for 
           52  second shut-off valve 
           54  outflow of  32   
           56  first nozzle 
           58  second nozzle 
           60  third nozzle 
           62  fourth nozzle 
           64  rotation axis 
           66  first splash guard 
           68  second splash guard 
           70  first air channels 
           72  second air channels 
           74  first engine 
           76  second engine 
           78  third engine 
           80  fourth engine 
           82  second washing nozzle 
           84  first seat heating 
           86  second seat heating 
           88  water inlet 
           90  seal 
           100  flushing and cleaning system 
           200  rotation unit