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WO2018140998A1 - Agencement de clapet et dispositif d'extraction d'odeur - Google Patents

Agencement de clapet et dispositif d'extraction d'odeur Download PDF

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Publication number
WO2018140998A1
WO2018140998A1 PCT/AU2018/000006 AU2018000006W WO2018140998A1 WO 2018140998 A1 WO2018140998 A1 WO 2018140998A1 AU 2018000006 W AU2018000006 W AU 2018000006W WO 2018140998 A1 WO2018140998 A1 WO 2018140998A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve seat
valve
engaging region
seat engaging
closed position
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/AU2018/000006
Other languages
English (en)
Inventor
Geoffrey Charles Quick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority claimed from AU2017900286A external-priority patent/AU2017900286A0/en
Application filed by Individual filed Critical Individual
Priority to AU2018216626A priority Critical patent/AU2018216626A1/en
Publication of WO2018140998A1 publication Critical patent/WO2018140998A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/04—Special arrangement or operation of ventilating devices
    • E03D9/05—Special arrangement or operation of ventilating devices ventilating the bowl
    • E03D9/052—Special arrangement or operation of ventilating devices ventilating the bowl using incorporated fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/44—Details of seats or valve members of double-seat valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/021—Check valves with guided rigid valve members the valve member being a movable body around which the medium flows when the valve is open

Definitions

  • the present invention relates to a valve arrangement for a suction means and an odour extraction device for a toilet.
  • the invention has been primarily developed for use in toilets in fixed homes and will be described hereinafter with reference to this application. However, the invention is not limited to this particular use and is also applicable for use with toilets in other environments such as: marine vessels; mobile homes; campervans; recreational vehicles; caravans; portable buildings and portable toilets.
  • valve arrangement aspect of the invention also finds application in respiratory devices.
  • WO 2007/079524 discloses embodiments of an odour extraction device for gravity flushing and syphonic flushing toilet pans.
  • the disclosed odour extraction devices include a one way valve to prevent unpleasant odours from flowing from the sewer back to the toilet pan.
  • the disclosed odour extraction devices utilise a suction fan to draw gas from within the pan and expel it through a duct into the pan's flushing outlet pipe. The gas then flows through the pan's flushing outlet pipe into the sewer.
  • valves used in devices of this type often include a relatively rigid rubber valve member which seals against a plastic valve seat.
  • the valve members are often delivered with a protective sili cone film thereon, which improves the sealing of the rubber valve member against the plastic valve seat, particularly at lower pressures.
  • a disadvantage of such val ve members is the flow of gases past the valve members can dry out the silicone film and lead to a loss of such sealing effectiveness between the valve member and the valve seat.
  • Another disadvantage is the silicone film can produce superior sealing results during initial testing (e.g. for regulatory compliance) which may not be achievable during longer term use.
  • Another disadvantage of known val ve members is that they only function correctl y within a relatively small pressure range.
  • Valve members that are flexible enough to seal at lower pressures can distort and lose sealing at higher pressures (e.g. 500 Pa), by "blowing out”.
  • Valve members that are rigid enough to maintain a seal at higher pressures will often distort enough to not reliably seal at lower pressures.
  • the present invention provides a valve arrangement for a suction means, the valve arrangement including:
  • the one way valve including a elastomeric valve member and a valve seat, the valve member being biased towards a closed position substantially blocking gas communication between the inlet and the outlet by sealing engagement of the valve member with the valve seat, the valve member adapted for
  • valve member includes a first valve seat engaging region and a second valve seat engaging region, the first valve seat engaging region being more flexible than the second valve seat engaging region.
  • the valve arrangement is preferably for a toilet odour extraction device.
  • the present invention provides an odour extraction device for a toilet pan, the odour extraction device including:
  • a gas inlet adapted for gas communication with an interior of the toilet pan above a water level in the pan;
  • a gas outlet in gas communication with the inlet and adapted for gas communication with a sewer pipe
  • valve inlet in gas communication with the gas inlet
  • valve outlet in gas communication with the gas outlet
  • suction means adapted to, upon energisation, propel gas from the gas inlet to the gas outlet;
  • the one way valve including a elastomeric valve member and a valve seat, the valve member being biased towards a first closed position substantially blocking gas communication between the inlet and the outlet by sealing engagement of the valve member with the valve seat, the valve member adapted for disengagement from the valve seat to allow gas to flow between the inlet and the outlet responsive to a predetermined minimum pressure differential being generated across the valve member by energising of the suction means,
  • valve member includes a first valve seat engaging region and a second valve seat engaging region, the first valve seat engaging region being more flexible than the second valve seat engaging region.
  • the first valve seat engaging region preferably abuts the valve seat in the first closed position.
  • the second valve seat engaging region is preferably proud of the valve seat in the first closed position.
  • the second valve seat engaging region preferably abuts the valve seat in a second closed position, with the valve member being closer to the inlet in the second closed position compared to the first closed position.
  • the valve member is preferably driven to the second closed position by back pressure from the outlet.
  • the first valve seat engaging region preferably remains abutted against the valve seat in the second closed position.
  • the valve seat preferably includes first and second valve seat surfaces.
  • the first valve seat engaging region engages the first valve seat surface in the first closed position.
  • the second val ve seat engaging region is proud of the second val ve seat surface in the first closed position.
  • the second valve seat engaging region engages the second valve seat surface in the second closed position.
  • the first valve seat engaging region and the second valve seat engaging region are preferably formed from the same material, with the first valve seat engaging region being thinner than the second valve seat engaging region.
  • the first valve seat engaging part and the second valve seat engaging part are preferably integrally formed.
  • the first valve seat surface is preferably smaller, and most preferably within, the second valve seat surface.
  • the first and second valve seats are preferably generally round and concentrically arranged.
  • the first and second valve seats are preferably located on distal edges of first and second upstanding cylindrical flanges.
  • the first valve seat surface is preferably, in an axial direction, closer to the inlet than the second valve seat surface.
  • the first valve seat engaging region is preferably smaller than the second valve seat engaging region.
  • the first and second valve seat engaging regions are preferably generally round and concentrically arranged.
  • the first and second valve seat engaging regions are preferably outwardly extending annular flanges.
  • the first valve seat engaging region is preferably, in a axial direction, closer to the inlet than the second valve seat engaging region.
  • the elastomeric valve member preferably includes a relatively rigid inner part with an axially extending guide cylinder.
  • the guide cylinder preferably slidably engages with an axially extending guide post.
  • the valve member is preferably biased towards the first closed position by gravity.
  • the valve member is preferably lower in the second closed position compared to the first closed position.
  • FIG. 1 is a schematic cross sectional side view of an embodiment of an odour extraction device for a toilet with an embodiment of a valve arrangement for a suction means therein, the valve arrangement being shown in a first closed position by gravity;
  • F ig. 2 is a schematic cross sectional side view of the odour extraction device and the valve arrangement shown in Fig. 1 , the valve arrangement being shown in an open position;
  • Fig. 3 is a schematic cross sectional side view of the odour extraction device and the valve arrangement shown in Fig. 1 , the valve arrangement being shown in a second closed position by back pressure; and
  • Fig. 4 is an enlarged partial detail view of the valve arrangement.
  • Fig. 1 shows an odour extraction device 10 for use with a gravity flushing or siphonic flushing toilet pan.
  • the odour extraction device 10 includes a plastic body 12 with a circular gas inlet 14 and a circular gas outlet 16.
  • the gas inlet 14 can recei ve unpleasant odours in gaseous form from an interior of the toilet pan and the gas outlet 16 can communicate those unpleasant odours to a sewer.
  • a suction fan 18 is positioned within the body 12.
  • the fan is rotationally driven by an electric motor (not shown).
  • a guide post 20 extends from the fan 18 and electric motor.
  • a rubber valve member 22 of generally annular construction is positioned within the body 12, generally adjacent the gas inlet 14.
  • the valve member 22 is mounted to a rigid plastic inner part 24 from which extends a guide cylinder 26.
  • the guide cylinder 26 slidably engages with the guide post 20 to guide the valve member 22 in axial movement towards and away from the gas inlet 14, as will be described in more detail below.
  • the valve member 22 includes a first valve seat engaging region, in the form of a first outwardly extending annular flange 22a, and a second valve seat engaging region, in the form of a second outwardly extending annular flange 22b.
  • the flanges 22a and 22b are integrally moulded with the remainder of the valve member 22.
  • the outer diameter of the first flange 22a is also smaller than that of the second flange 22b.
  • the body 12 includes a valve seat 28 adjacent to and around the gas inlet 14.
  • the valve seat 28 includes a first valve seat surface, in the form of a distal edge 30a of a first upstanding cylindrical part 30, and a second valve seat surface, in the form of a distal edge 32a of a second upstanding cylindrical part 32.
  • the outer diameter of the first cylindrical part 30 is smaller than that of the second cylindrical part 32 so as to position the first and second distal edges 30a and 32a adjacent to the first and second annular flanges 22a and 22b respectively.
  • FIG. 1 shows the odour extraction device 10 when the motor that drives the fan 18 is not energised and the valve member 22 is in a first closed position, hereafter referred to as a "gravity closed" position.
  • the air pressure at the gas inlet 14 and the gas outlet 16 is substantially equal (i.e. atmospheric).
  • the valve member 22 falls downwardly under the influence of gravity until the first annular flange 22a abuts the first distal edge 30a. Passage of gas into the air inlet 16 is then prevented by the sealing engagement of the first annular flange 22a with the first distal edge 30a.
  • the second annular flange 22b sits slightly proud (i.e. above) and thus does not seal against, the second distal edge 32a in the gravity closed position. Importantly, as only the (more flexible) first flange 22a is sealingly engaged with the first valve seat surface 30a in this position, then correct sealing at relatively low pressures is reliably achieved.
  • FIG. 2 shows the odour extraction device 10 in an "open" position during energising of the motor to rotate the fan 18.
  • the rotation of the fan 18 creates a suction/pressure differential of about 50 Pa across the gas inlet 14 which draws the val ve member 22 upwardly, against the influence of gravity.
  • neither the first or second annular flanges 22a or 22b of the valve member 22 engage with the respective first or second distal edges 30a or 32a of the valve seat 28. Accordingly, in the open position, gas is drawn into the body 12 through the inlet 14 and travels through the fan 18 and is then propelled out the body 10 through the outlet 16, as indicated by arrows 34.
  • Fig. 3 shows the odour extraction device 10 in a second closed position, hereafter referred to as a "back pressure closed” position.
  • the motor driving the fan 18 is not energised in this position.
  • the presence of back pressure at the gas outlet 18, as indicated by arrows 36, forces the valve member 22 further downwardly from the gravity closed position shown in Fig. 1 and closer to the valve seat 22 until the second annular flange 22b engages the second distal edge 32a.
  • the second valve seat flange 22b is thicker and less flexible than the first annular flange 22a, it is able to resist the back pressure at this position without significant distortion. This assists the sealing of the gas inlet 14 in two ways.
  • valve member 22 is prevented from being forced to a position where the first flange 22a is inserted and/or driven through the gas inlet 14, thereby breaking or "blowing out” the seal.
  • second flange 22b itself creates an additional gas tight seal against the second distal edge 30a.
  • back pressure surges can be up to 500 Pa and can be caused by a pressure differential between atmosphere and the pan's flushing outlet pipe or the drainage system or the sewer mains becoming blocked.
  • the odour extraction device and valve arrangement described above are therefore advantageously able to establish and maintain sealing at both lower and higher pressures and thus function correctly over a much larger pressure range than known arrangements. Further, the relatively thin and more flexible first valve member flange functions reliably at lower pressures without requiring a protective silicone film.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Mechanical Engineering (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Lift Valve (AREA)

Abstract

L'invention concerne un agencement (10) de clapet destiné à un moyen d'aspiration, l'agencement (10) de clapet comprenant : une entrée (14) de clapet ; une sortie (16) de clapet ; un clapet unidirectionnel entre l'entrée (14) et la sortie (16), le clapet unidirectionnelle comprenant un élément (22) de clapet en élastomère et un siège (28) de clapet, l'élément (22) de clapet étant sollicité vers une position fermée bloquant sensiblement une communication de gaz entre l'entrée (14) et la sortie (16) par mise en prise étanche de l'élément (22) de clapet avec le siège (28) de clapet, l'élément (22) de clapet étant conçu pour être libéré du siège (28) de clapet pour permettre au gaz de circuler entre l'entrée (14) et la sortie (16) en réponse à un différentiel de pression minimal prédéterminé qui est généré à travers l'élément (22) de clapet par mise sous tension du moyen d'aspiration, l'élément (22) de clapet comprenant une première région (22a) de mise en prise de siège de clapet et une seconde région (22b) de mise en prise de siège de clapet, la première région (22a) de mise en prise de siège de clapet étant plus flexible que la seconde région (22b) de mise en prise de siège de clapet.
PCT/AU2018/000006 2017-02-01 2018-01-31 Agencement de clapet et dispositif d'extraction d'odeur Ceased WO2018140998A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2018216626A AU2018216626A1 (en) 2017-02-01 2018-01-31 A valve arrangement and an odour extraction device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2017900286 2017-02-01
AU2017900286A AU2017900286A0 (en) 2017-02-01 A valve arrangement and an odour extraction device

Publications (1)

Publication Number Publication Date
WO2018140998A1 true WO2018140998A1 (fr) 2018-08-09

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ID=63039255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2018/000006 Ceased WO2018140998A1 (fr) 2017-02-01 2018-01-31 Agencement de clapet et dispositif d'extraction d'odeur

Country Status (2)

Country Link
AU (1) AU2018216626A1 (fr)
WO (1) WO2018140998A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3626950A1 (fr) * 2018-09-18 2020-03-25 Continental Automotive GmbH Soupape ainsi que procédé de fabrication d'une soupape
EP3626948A1 (fr) * 2018-09-18 2020-03-25 Continental Automotive GmbH Soupape ainsi que procédé de fabrication d'une soupape
CN112610708A (zh) * 2020-12-09 2021-04-06 浙江大学 一种双座式调节阀及其密封结构和方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1096401A (fr) * 1949-05-20 1955-06-21 Clapet pour tuyauterie
WO1980002577A1 (fr) * 1979-05-16 1980-11-27 Lagerstedt & Krantz Ab Moyens de ventilation dans un water-closet
WO2007079524A1 (fr) * 2006-01-10 2007-07-19 Geoffrey Charles Quick Dispositif d’extraction d’odeurs pour cuvette wc
US20090267014A1 (en) * 2005-04-14 2009-10-29 Tsukuo Ishitoya Fluid On-Off Valve Device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1096401A (fr) * 1949-05-20 1955-06-21 Clapet pour tuyauterie
WO1980002577A1 (fr) * 1979-05-16 1980-11-27 Lagerstedt & Krantz Ab Moyens de ventilation dans un water-closet
US20090267014A1 (en) * 2005-04-14 2009-10-29 Tsukuo Ishitoya Fluid On-Off Valve Device
WO2007079524A1 (fr) * 2006-01-10 2007-07-19 Geoffrey Charles Quick Dispositif d’extraction d’odeurs pour cuvette wc

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3626950A1 (fr) * 2018-09-18 2020-03-25 Continental Automotive GmbH Soupape ainsi que procédé de fabrication d'une soupape
EP3626948A1 (fr) * 2018-09-18 2020-03-25 Continental Automotive GmbH Soupape ainsi que procédé de fabrication d'une soupape
CN112610708A (zh) * 2020-12-09 2021-04-06 浙江大学 一种双座式调节阀及其密封结构和方法

Also Published As

Publication number Publication date
AU2018216626A1 (en) 2019-09-26

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