+

WO1996019157A1 - Dispositif pour systeme mixte d'evacuation et d'aspiration par depression - Google Patents

Dispositif pour systeme mixte d'evacuation et d'aspiration par depression Download PDF

Info

Publication number
WO1996019157A1
WO1996019157A1 PCT/SE1995/001524 SE9501524W WO9619157A1 WO 1996019157 A1 WO1996019157 A1 WO 1996019157A1 SE 9501524 W SE9501524 W SE 9501524W WO 9619157 A1 WO9619157 A1 WO 9619157A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
drainage
fluid
vacuum
height
Prior art date
Application number
PCT/SE1995/001524
Other languages
English (en)
Inventor
Olle Olsson
Original Assignee
Olle Olsson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olle Olsson filed Critical Olle Olsson
Priority to AU43208/96A priority Critical patent/AU4320896A/en
Publication of WO1996019157A1 publication Critical patent/WO1996019157A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/06—Saliva removers; Accessories therefor
    • A61C17/065—Saliva removers; Accessories therefor characterised by provisions for processing the collected matter, e.g. for separating solids or air

Definitions

  • the present invention relates to a device for vacuu - powered, combined drainage and spot extraction systems for e.g. dentist's chairs and similar applications in accordance with the preamble of the accompanying patent claims.
  • a dentist's chair usually stands, as mentioned above, in the centre of the floor of a room, and the dentist and the dental nurse must be able to move freely around substantially all sides of the chair.
  • the discharge pipe is preferably drawn vertically from the media box towards the ceiling, where continuing piping, without being in the way, subsequently connects the discharge pipe to a vacuum pump which may be placed in a separate pump room and be serving all the chairs of a larger dental surgery, without causing disturbing pump and motor noise in the surgery room.
  • the drainage tank is most commonly designed with a sloping bottom and with the discharge pipe connected at the lowest point thereof.
  • the replenishing air pipe which has to be arranged so that air can quickly replace the fluid volume in the tank during the emptying process, is also connected at the bottom of the tank.
  • the vacuum pump In the pump room, there may be a separator upstream of the vacuum pump to catch the solid, often environmentally dangerous, particles like amalgam, etc. coming with the drainage water. The latter then flows down into a collec ⁇ tion tank, from where it can be emptied into an existing floor sink by gravity. The exhaust air from the vacuum pump is discharged to the exterior through a suitable filter.
  • valves For systems with several chairs and accompanying drainage tanks to be emptied, the system is supplemented by a number of valves and a preferably computerised control system that opens and closes valves in the pipes leading to the individual tanks, emptying them one at a time at predetermined intervals, the lengths of which are set so as normally not to overfill the tanks.
  • the same vacuum pump is simultaneously used to provide the necessary vacuum in the saliva extractors.
  • These extractors are therefore arranged so as to be always in connection with said vacuum pump, independently of the functional position of the valves controlling the empty ⁇ ing sequence of the various tanks.
  • a valve opens and connects the saliva extractor directly to the vacuum pump.
  • the vacuum level in a saliva extractor should be about 1,5 m Aq (meters of water column), and not above 2,0 m Aq, for two reasons.
  • One reason is simply the risk of the saliva extractor clinging to the oral mucous membranes and damaging these when being removed, the other is that too high a vacuum causes a disturbing noise level.
  • a third technical problem is to ventilate the drainage tanks as they are successively filled when rinsing the patient's mouth, etc.
  • the discharge replenishing air pipe is connected at the bottom of the tank to enhance fluid circulation during discharge. Consequently, this pipe cannot ventilate the tank volume above the fluid surface, but with such a design, the air pressure inside the tank would rise, as would the fluid level in the replenishing air pipe and in the line from the rinsing fountain.
  • this problem has hitherto been resolved by means of a small, separate venting hole in the top of the tank. This will work well as long as the tank is never overfilled but is emptied before that, but there is a leakage risk, e.g.
  • the object of the present invention is therefore to provide a vacuum powered emptying system for drainage tanks at dentist's chairs and the like, in which the above disadvantages have been eliminated in a simple way and where the entire system is enclosed inside the public surgery rooms and has openings for entering and exiting air in the open air and an outlet for the drained sewage water only inside a separately arranged, ventilated machinery room.
  • Fig. 1 shows, schematically, the main parts of a vacuum-powered, combined drainage and spot extraction system according to the invention, but does not, for the sake of clarity, show all component parts and functions, but only those being directly associated with the present invention
  • Fig. 2 shows in more detail, how the tank and the piping system may in principle be arranged by a dentist's chair, and a section, not according to scale, through a drainage fluid tank and its discharge pipe, which schematically shows the relation between room height, suitable vacuum in m Aq and the same fluid volume, inside the tank and being sucked up into the discharge pipe respectively, according to the invention, and
  • Fig. 3 shows, in two side views, how on the one hand the collected drainage water amount in the tank rests in said tank immediately before being emptied, and how it on the other is sucked up into the discharge pipe at the beginning of the discharge phase.
  • the figure also shows an alter ⁇ native embodiment of the invention having an ejector in the discharge pipe to increase the pumping head power. This figure is also not on scale but only schematical.
  • a system for vacuum-powered, combined drainage and spot extraction systems for e.g. dentist's chairs and similar applications comprises the following main parts:
  • dentist's chairs in this embodiment example three chairs, there is provided respectively; one tank 1 for drainage fluid at the floor level, one saliva extractor 2 of a known kind, and a conventional mouth rinsing fountain 3.
  • a pipe 4 which, seen from the tank, is an inlet pipe for the drainage fluid.
  • a remote controlled shut-off valve 13 normally being held open by the not in detail described control system, but which is closed during emptying of the tank 1 to eliminate suction noise from the fountain 3.
  • the piping system 7 connects to a vacuum pump 9, located in a separate machinery room 26 in order to achieve sound ⁇ proofing of the surgery rooms.
  • a not in more detail described separation system 8 preferably compris ⁇ ing several tanks, separators, filters and valves, all in order to clean the drainage fluid from amalgam and other solid particles before the water is led out into the normal drainage system by way of a floor sink 18.
  • the used air from the vacuum pump passes via a filter 10 into the open air through an exhaust pipe 17.
  • Each tank is provided with a level gauge 23, which, if the pre ⁇ programmed control system has not previously ordered emptying of the tank, will do so at a certain predeter ⁇ mined maximum volume in the tank. See below for further information on the significance of this volume.
  • the saliva extractors 2 at each chair are in practice commonly provided with shut-off valves, which are auto ⁇ matically opened when the extractor is lifted off its suspension hook. It is however an important principle of the device according to the present invention, that the saliva extractors are always to be ready for use and supplied with a suitable vacuum, independently of any discharge process at any drainage tank 1, that might be running simultaneously.
  • a suitable vacuum independently of any discharge process at any drainage tank 1, that might be running simultaneously.
  • the vacuum pump 9 is arranged always to provide a controlled vacuum of a level h v suitable for the saliva extractors in accordance with the above description, i.e. about 1,5 - 2,0 m Aq.
  • the vertical distance between the tank 1 bottom and the piping system 7 level at the ceil ⁇ ing is H, whereby H is larger than h v . This means that the vacuum pump cannot suck a homogenous fluid column from the tank bottom level to the piping system level and that the tank 1 in an arrangement according to the known art would not be emptied.
  • the fluid volume inside the tank 1 when the tank mounted level gauge 23 at the latest orders the tank to be emptied via the not in detail described control system, is so adapted to the diameter of the discharge pipe 5, that the entire volume in the drainage tank 1 will form a fluid column in the discharge pipe 5, with a height h which is so much smaller than said suitable work vacuum h v , that this work vacuum will suck air through said fluid column, when the discharge pipe 5 is connected to the piping system 7 and the vacuum pump 9 via the valve 12.
  • the maximum fluid volume in the tank 1 before it is emptied is shown as a single-hatched area, and the same volume sucked up into the respective discharge pipe 5 is shown as a cross-hatched area.
  • Figs. 3a and 3b show the static position before emptying, whereas Fig. 3c shows discharge in progress.
  • the capacity of the vacuum pump is furthermore adapted so that the air will flow through the drainage fluid in the discharge pipe 5 at such a speed that the fluid will successively disintegrate and follow the air flow up to ceiling level and on through the piping system 7 to the separation apparatus 8, even if the room ceiling height results in a piping system 7 height H which considerably exceeds the height of the water column corresponding to the highest suitable vacuum level h v in the saliva extractors.
  • all air inlet pipes 11 are connected to a ceiling-mounted piping system 15 and terminating in an intake 16 in the open air outside the surgery, in order to reduce the intake noise and to prevent even small amounts of contaminated air to be returned to the premises.
  • a ceiling-mounted piping system 15 As the not in detail described control system empties one tank 1 at a time, it would be possible, as the other rinsing fountains 3 must be available for use also during the time that one tank is emptied, for drainage fluid from another tank l than the one being emptied, to rise backwards into its respec ⁇ tive replenishing air line 11 due to the vacuum occurring in the piping 15 when a tank 1 under discharge is rapidly being replenished with air.
  • every air replenishing pipe 11 is equipped with a shut-off valve, in the preferred embodiment example in the form of a check valve 14, which closes automatically if the flow direction is reversed and prevents any reverse flow in the pipes 11.
  • Fig. 3 also shows a variant of the device according to the invention, where a small connection pipe with an adjustable restriction is arranged between the replenish- ing air inlet pipe 11 and the discharge pipe 5, just below that fluid level which will be the highest continu ⁇ ous one inside said pipe when discharging commences.
  • a small connection pipe with an adjustable restriction is arranged between the replenish- ing air inlet pipe 11 and the discharge pipe 5, just below that fluid level which will be the highest continu ⁇ ous one inside said pipe when discharging commences.
  • valves 13 and 14 required for control of the emptying sequence in these systems are commonly relatively large and are servo controlled electro-pneumatically by the not in detail described control system, by means of smaller so called solenoid valves 19, which are normally mounted at the ceiling together with the piping system 7, and which are supplied with compressed air from a compressed air source 20.
  • solenoid valves 19 When these valves 19 switch, their exhaust air will cause a certain noise which may be disturbing.
  • the exhaust lines 21 and 22 from the valves 19 are connected to this piping system and thereby the disturbing noise is elimi- nated together with any oil mist that might discolour the ceiling plates after a long period of service.
  • the invention is not limited by the embodiment examples described above and depicted in the drawings, but may be varied within the scope of the accompanying patent claims.
  • the device may for example of course be utilised also for other combined drainage and spot extraction systems than those for dentist's chairs.
  • the number of connected drainage tanks 1 and spot extractors 2 may of course be varied freely.
  • the size of the tanks 1 may be varied arbitrarily, provided that other parameters necessary for the function of the device according to the principles of the invention, e.g. the size of the discharge pipe, the flow rate capacity and the pre-set vacuum level of the vacuum pump and the distance in height between the bottom of the tank and the ceiling level piping, can be adapted to such variations.
  • shut-off valves in the pipes 11, which in the described embodiment example are designed as check valves 14, may of course be replaced by shut-off valves of the same type as those located in the discharge pipes and be controlled to closing and opening by the not in detail described control system that controls the other shut-off valves, to achieve the same effect.
  • the air inlet pipes may be equipped with filters if wanted.
  • the machin ⁇ ery room may preferably be put under sub-atmospheric pressure in order to prevent all remnants of mercury vapour from reaching the surgery rooms, etc.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • External Artificial Organs (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Système de purge par dépression d'un réservoir de vidange pour fauteuil de dentiste ou pour une installation semblable, ayant une hauteur de dépression correcte pour des appareils à évacuation instantanée. Les réservoirs de vidange peuvent être vidés de façon simple bien que la hauteur de refoulement de la tuyauterie de vidange soit supérieure à la hauteur de dépression. Le dispositif se trouve entièrement à l'intérieur de la zone d'intervention chirurgicale, mais tous les orifices d'entrée et de sortie se trouvent à l'extérieur de cette zone. L'invention se caractérise par le volume maximal de liquide que contient chaque réservoir de vidange (1) et par la section du tuyau vertical de vidange (5), compatibles l'un par rapport à l'autre, ainsi que par la hauteur de dépression hv de la pompe à vide (9), égale à la hauteur maximale de dépression admissible dans les appareils à évacuation instantanée (2), de telle façon qu'en cours de vidage, le contenu du réservoir forme dans le tuyau de vidange (5) une colonne liquide de hauteur h, cette hauteur étant nettement inférieure à la hauteur hv à laquelle l'air est aspiré dans la colonne de liquide, à une vitesse telle que le liquide de vidange est désagrégé et amené jusqu'à une hauteur H dans la tuyauterie de vidange (7).
PCT/SE1995/001524 1994-12-20 1995-12-18 Dispositif pour systeme mixte d'evacuation et d'aspiration par depression WO1996019157A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43208/96A AU4320896A (en) 1994-12-20 1995-12-18 Device for a vacuum powered combinated discharge and suction system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9404417A SE502740C2 (sv) 1994-12-20 1994-12-20 Anordning vid vakuumdrivet kombinerat avlopps- och punktutsugssystem
SE9404417-9 1994-12-20

Publications (1)

Publication Number Publication Date
WO1996019157A1 true WO1996019157A1 (fr) 1996-06-27

Family

ID=20396391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001524 WO1996019157A1 (fr) 1994-12-20 1995-12-18 Dispositif pour systeme mixte d'evacuation et d'aspiration par depression

Country Status (3)

Country Link
AU (1) AU4320896A (fr)
SE (1) SE502740C2 (fr)
WO (1) WO1996019157A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108252897A (zh) * 2018-01-29 2018-07-06 山东临沂新华印刷物流集团有限责任公司 水循环真空吸泵装置及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237708A1 (fr) * 1986-01-17 1987-09-23 Dürr-Dental GmbH & Co. KG Dispositif d'aspiration dentaire
EP0406635A2 (fr) * 1989-06-24 1991-01-09 Dürr-Dental GmbH & Co. KG Installation de crachoir dentaire
WO1993016655A1 (fr) * 1992-02-27 1993-09-02 Dürr Dental GmbH & Co. KG Dispositif d'acheminement des eaux residuelles produites dans un cabinet dentaire, vers un raccordement d'evacuation central

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237708A1 (fr) * 1986-01-17 1987-09-23 Dürr-Dental GmbH & Co. KG Dispositif d'aspiration dentaire
EP0406635A2 (fr) * 1989-06-24 1991-01-09 Dürr-Dental GmbH & Co. KG Installation de crachoir dentaire
WO1993016655A1 (fr) * 1992-02-27 1993-09-02 Dürr Dental GmbH & Co. KG Dispositif d'acheminement des eaux residuelles produites dans un cabinet dentaire, vers un raccordement d'evacuation central

Also Published As

Publication number Publication date
SE9404417L (sv) 1995-12-18
AU4320896A (en) 1996-07-10
SE502740C2 (sv) 1995-12-18
SE9404417D0 (sv) 1994-12-20

Similar Documents

Publication Publication Date Title
US6827097B2 (en) Water cooler drip tray drainage apparatus
US8784651B2 (en) Water separator
JPS6234578B2 (fr)
US20160040415A1 (en) Ventilating System For Toilet Stool
CN110431367B (zh) 积聚和排泄来自制冷和冷却装置的除霜水和冷凝水的装置
KR20000011409A (ko) 하수시스템
WO1996019157A1 (fr) Dispositif pour systeme mixte d'evacuation et d'aspiration par depression
CN202936829U (zh) 一种全自动自清洁式地下污水提升排放设备
US6513187B1 (en) Continuous carpet cleaning system
US20090000019A1 (en) Waste transport system and apparatus for use with low water or water free waste disposal devices
EP1819294B1 (fr) Separateur d'eau pour la separation continue d'eau, d'air et de particules, et son procede de commande
JP3108548U (ja) 歯科排水用排水分離器
JPH05148883A (ja) 下水システム
JP2005351031A (ja) 真空排水システム
DE19638831B4 (de) Geruchabsaugung aus WC-Becken
EP2130982A1 (fr) Installation de toilette, réservoir de chasse d'eau et méthode de débouchage
KR100488464B1 (ko) 중앙집중식 진공청소시스템
CN218779580U (zh) 一种联合供水装置
KR102243254B1 (ko) 악취차단 및 악취처리 기능을 겸비하는 폐수중계펌프장
KR101182482B1 (ko) 진공강자흡식펌프가 구비된 진공흡입장치
KR101672515B1 (ko) 오수 배출용 진공 흡입 장치
JP3715699B2 (ja) 真空弁付き汚水桝
KR0171537B1 (ko) 무동력 폐수 자동배출 장치
JP2006082067A (ja) 歯科チェアユニットの排水処理系配管
CN119058956A (zh) 飞行器中使用的供水系统、飞行器中从供水系统的缓冲罐排水或者使空气进入或离开供水系统的缓冲罐的方法及包括供水系统的飞行器

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载