EP3542001A1 - Waste water piping system and an air valve - Google Patents
Waste water piping system and an air valveInfo
- Publication number
- EP3542001A1 EP3542001A1 EP17872546.1A EP17872546A EP3542001A1 EP 3542001 A1 EP3542001 A1 EP 3542001A1 EP 17872546 A EP17872546 A EP 17872546A EP 3542001 A1 EP3542001 A1 EP 3542001A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air valve
- waste water
- valve
- air
- water pipe
- 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.)
- Pending
Links
Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/122—Pipe-line systems for waste water in building
- E03C1/1222—Arrangements of devices in domestic waste water pipe-line systems
- E03C1/1225—Arrangements of devices in domestic waste water pipe-line systems of air admittance valves
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/28—Odour seals
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- 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
- F16K15/023—Check valves with guided rigid valve members the valve member being a movable body around which the medium flows when the valve is open the valve member consisting only of a predominantly disc-shaped flat element
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- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
Definitions
- the present invention relates to an air valve device for equalizing waste water pipe underpressures while preventing odours from escaping the waste water piping system.
- the present invention also relates to a waste water piping system.
- a waste pipe, or soil pipe is typically fitted in a building for the purpose of leading away waste water that may be generated by water closets, baths, wash basins, kitchen sinks, etc.
- the waste pipe may have a relatively large inner diameter allowing the waste pipe to be partly air filled.
- the waste pipe may be arranged such that waste water can flow away from the waste water generator, i.e. from the water closet, bath tub, wash basin, or kitchen sink, etc, by means of gravity.
- waste water includes sewer
- the waste pipe may hold sewer gases that may be generated by the decomposition of organic household wastes or industrial wastes.
- the air valve will normally close when the pressure in the pipe to which the valve is connected is the same as the pressure outside the pipe.
- the air valve may also seal the pipe channel effectively when the pressure in the pipe is higher than the ambient pressure.
- the valve will open and allow ambient air to enter so as to equalize the under-pressure. This prevents the liquid in the water-seal of the wash basins etc. from being sucked away therefrom. If the liquid were removed from the water-seal of e.g. a water closet, then air and sewer gases from the waste water pipe would be allowed to pass freely into the room where the water-seal was installed.
- the air valve may also prevent odours as well as warm and moist air from flowing out from an end portion of the waste pipe.
- EP 0 867 569 discloses an air valve including a vertically positioned pipe connector.
- the vertically positioned pipe connector can be fitted to the upper end of a vertical portion of a waste pipe.
- the vertically positioned pipe connector has an upper end that forms a valve seat in the form of a ring-shaped, horizontal sealing ridge.
- the air valve includes a vertically movable valve plate which carries on its underside an annular sealing washer whose radially inner and outer edge-parts are able to rest sealingly onto concentrically, upwardly facing valve-seat rings, wherewith the washer seals the annular gap between said ring seats.
- the valve washer normally rests on the two ring-shaped, horizontal sealing ridges under the influence of the combined weight of the sealing washer and the guided plate carrying the washer. The valve opens in response to pressure differences.
- US209975 Al shows, in figure 1, a vertical section of an air valve having a chamber A and a vertically positioned pipe B, the vertically positioned pipe B connecting with a horizontally positioned waste water pipe.
- the lower part of the disclosed air valve chamber A has an opening C for admitting air up into the chamber A, so that the admitted air can flow sideways to said vertically positioned pipe B, and then vertically downwards through the vertically positioned pipe B, and thereafter the admitted air can make yet another 90 degree bend to finally flow in a horizontal direction in the horizontally positioned waste water pipe.
- a waste water piping system (5) including: a non-vertical waste water pipe (22), such as a sewage pipe, that may include a liquid trap seal (25); an adapter (200); and an air valve (1) for equalizing waste water pipe under-pressures exceeding a predetermined threshold under-pressure value while preventing odours from escaping the waste water piping system (5);
- the air valve (1) comprising: a valve housing (100) having: a housing body (105); an air valve input (110); and an air valve output (120); wherein said housing body (105) is positioned between the air valve input (110) and the air valve output (120), said housing body (105) forming a channel for fluidly connecting the air valve input (110) with the air valve output (120); wherein the valve housing (100) further comprises: a channel part (180) attached to the air valve input (110); a valve seat (140)
- This solution advantageously enables mounting the air valve outdoors while also enabling an efficient equalizing of waste water pipe under-pressures.
- the mounting of the air valve outdoors renders a reduction of space requirements indoors in the building wherein the waste water piping system is located.
- the design of the air valve and the connection of the air valve, via said adapter, to an end portion of said non-vertical waste water pipe renders efficient equalizing of waste water pipe under-pressures since ambient air can flow from the air valve input into the non-vertical waste water pipe with a minimum of air flow direction changes.
- a state of the art air valve disclosed by US209975 Al includes an air valve having a chamber and a vertically positioned pipe, the vertically positioned pipe connecting with a horizontally positioned waste water pipe.
- the lower part of the disclosed air valve chamber has an opening for admitting air up into the chamber, so that the admitted air can flow sideways to said vertically positioned pipe, and then vertically downwards through the vertically positioned pipe, and thereafter the admitted air can make yet another 90 degree bend to finally flow in a horizontal direction in the horizontally positioned waste water pipe.
- the state of the art air valve disclosed by US209975 Al inherently includes a vertically positioned pipe between the state of the art air valve and the state of the art horizontally positioned waste water pipe
- the above defined solution advantageously eliminates the vertically positioned pipe, rendering a less bulky design while also enabling ambient air to flow from the air valve input into a non-vertical waste water pipe with a minimum of air flow direction changes.
- said air valve (1) and said adapter (200) are shaped and assembled such that when the air valve (1) is in the second state, said ambient air flows through said air valve input (110) into said air valve (1) in an input average flow direction (MC) and thereafter said ambient air flows through said air valve (1) and through said adapter (200) so as to enter into said non-vertical waste water pipe (22) in said output average flow direction (MA) rendering a change of average flow direction, said change of average flow direction being less than 180 degrees, said change of average flow direction being the angular difference between said input average flow direction and said output average flow direction.
- said change of average flow direction may be less than 180 degrees.
- said change of average flow direction may be less than 135 degrees.
- said non-vertical waste water pipe (22) may run in between a ceiling (27) of a lower level living space in a building and a floor structure (20) which may carry a plurality of waste water generators (21) connected to said waste water pipe (22).
- said inclination angle (v) may be smaller than 10 degrees.
- said inclination angle (v) may be smaller than 5,7 degrees.
- said non-vertical waste water pipe end portion (22A) may have an interior pipe surface, said adapter (200) having a protruding part (200A) being inserted into said pipe end portion (22A) and attached to the interior of the waste water pipe (22).
- said non-vertical waste water pipe (22) may have an exterior pipe surface; said adapter (200) having a protruding part (200A) adapted to enclose said exterior pipe surface, and adapted to be attached to at least a part of the exterior pipe surface.
- at least one sealing element may be provided between the protruding part (200A) of the adapter and the non-vertical waste water pipe end portion (22A) so as to prevent odours from escaping the waste water piping system (5).
- an air valve (1) for equalizing waste water pipe under-pressures exceeding a predetermined threshold under-pressure value while preventing odours from escaping a waste water piping system (5); the air valve (1) comprising: a valve housing (100) having: a housing body (105); an air valve input (110); and an air valve output (120) for connection to a non-vertical waste water pipe
- valve housing (100) further comprises: a channel part (180) attached to the air valve input (110); a valve seat (140) arranged at said air valve input (110), surrounding an entry from the first channel part (180) to said housing body (105); and a movable valve member (131) movably arranged inside the housing body (105), said movable valve member (131) having; a valve member surface (133) facing the channel part (180) and the valve seat (140), and wherein the air valve (1), in operation, is capable of switching between a first state and a second state dependent on a pressure difference ( ⁇ ) between an ambient first pressure level (PI), and a waste water piping system second pressure level (P2), wherein the air valve (1), in operation, is capable of switching between a first state and a second state dependent on a pressure difference ( ⁇ ) between an ambient first pressure level (PI), and a waste water piping system second pressure level (P2), wherein the air valve (1), in operation, is capable of switching between a first state and a second state
- said adapter (200) may be shaped such that when the air valve (1) is in the second state, said ambient air flows in said average flow direction perpendicular to the first virtual flat plane (A, A') through said adapter and into said non-vertical waste water pipe (22).
- said change of average flow direction may be at least 45 degrees, and said change of average flow direction is less than 135 degrees.
- said air valve output (120) may be connected, via said adapter (200), to said end portion of said non-vertical waste water pipe (22) so that the plane (B) of said valve seat (140) is arranged at a predetermined angle (w) in relation to a direction of elongation ( E22) of said non-vertical waste water pipe (22), said predetermined angle (w) having a value in a range between -45 degrees to +45 degrees.
- said adapter (200) may have a protruding part (200A) being insertable into said pipe end portion (22A) and attachable to an interior surface of the waste water pipe (22).
- said adapter (200) may have a protruding part (200A) adapted to enclose an exterior pipe surface, said protruding part (200A) being adapted to be attachable to at least a part of the exterior pipe surface.
- said adapter (200) may include at least one sealing element adapted to be placed between the protruding part (200A) of the adapter and the non- vertical waste water pipe end portion (22A) so as to prevent odours from escaping a waste water piping system (5).
- said at least one sealing element may comprise at least one flexible ridge (206) for sealing between the protruding part (200A) of the adapter (200) and the waste water pipe surface.
- Fig. 1 illustrates a building with a waste water piping system.
- Fig. 2 illustrates a cross section of a side view of an air valve in a first state according to one aspect of the invention.
- Fig. 3 illustrates a side view of an air valve according to one aspect of the invention.
- Fig.4 illustrates a cross section of a side view of an air valve in a second state according to one aspect of the invention.
- Fig. 7a illustrates a side view of a supporting element according to one aspect of the invention.
- Fig. 7b illustrates a top view of a supporting element according to one aspect of the invention.
- Fig. 8 illustrates a view of an air valve according to one aspect of the invention
- Fig. 9 illustrates a cross section of a front view of an air valve according to one aspect of the invention
- Fig. lOa-b illustrate a bottom view of an air valve and the supporting members of the air valve according to one aspect of the invention
- Fig. lla-b illustrate a bottom view of an air valve and the supporting members of the air valve according to one aspect of the invention
- the coordinate systems added to the figures are intended to clarify the angles of the views of the figures.
- the orientation of the coordinate system for each figure corresponds to the orientation of each respective figure.
- FIG. 1 illustrates an embodiment of a waste water piping system 5 for use in a multi-storey building 10.
- the building is schematically illustrated as having several floor structures 20 and a wall 26.
- the wall 26 may be a wall separating the interior space of the building from an exterior space.
- the wall 26 may be a wall separating the interior space of the building from the outside.
- a floor structure 20 of the building may comprise a waste water pipe 22 to which a number of schematically illustrated waste water generators 21 are connected.
- Each waste water generator 21 comprises a water seal 25.
- the waste water generators 21 could for example be a wash basin, a water closet, a shower outlet etc.
- the water seals 25 may prevent odour from escaping the waste water piping system 5 into the interior of the building.
- the waste water pipe 22 is connected to a waste water conduit 23, which may be adapted to collect waste water from a plurality of waste water pipes 22 and for delivering the collected waste water to a waste water outlet 24.
- the waste water pipe 22 may be mounted in the floor structure 20 between a ceiling 27 of a lower level living space in the building and a floor surface 28 of a higher level living space in the building.
- the waste water pipe 22 may run in the floor structure 20 which may carry a plurality of waste water generators 21.
- the waste water pipe 22 is arranged at an angle v in relation to a horizontal direction x so that the waste water pipe 22 connects to the waste water conduit 23 at a vertically lower level than the level at which the waste water generators 21 are connected to the waste water pipe 22.
- the waste water pipe 22 may have a downward inclination towards the waste water conduit 23.
- the angle v may be any angular value smaller than 10 degrees.
- the angle v may selected so that the waste water pipe 22 has an elevational drop of less than 10%, i.e. less than 10 centimetres per meter.
- a 10% elevational drop corresponds to 5,7 degrees.
- the angle v may be 5,7 degrees, or less than 5,7 degrees.
- the waste water pipe 22 may be mounted so that a one meter length of the waste water pipe 22 drops 10 centimetres, or less 10 centimetres.
- the waste water pipe 22 may be mounted at an inclination of less than 5%, i.e. so that a one meter length of the waste water pipe 22 drops 5 centimetres, or less 5 centimetres.
- a 5% elevational drop corresponds to 2,9 degrees.
- the angle v may be 2,9 degrees, or less than 2,9 degrees.
- the waste water pipe 22 may run in between a ceiling 27 of a lower level living space in the building and the floor structure 20 which may carry a plurality of waste water generators 21.
- the waste water pipe 22 and the waste water conduit 23 have a second pressure level P2.
- the second pressure level P2 may vary, for example due to a sudden appearance of a large amount of waste water being delivered from one or several of the waste water generators 21.
- an under-pressure in terms of the second pressure level P2 deviating from a first pressure level PI, which is the ambient pressure level of the environment, may develop when one or several waste water generators 21 deliver waste water simultaneously such that the second pressure level P2 in the waste water pipe 22 decreases when the pipe 22 empties into the conduit 23.
- an under-pressure may be created behind the waste water.
- the under-pressure in the waste water pipe 22 and the waste water conduit 23 may be alleviated by providing an air valve 1 for equalizing waste water pipe under-pressures and preventing the water seals 25 of the waste water generators 21 to be affected by the under- pressure in the waste water system 5.
- the air valve 1 may be attached to an end portion 22A the waste water pipe 22.
- the air valve 1 is arranged to open when the pressure difference ⁇ between an ambient first pressure level PI, and a waste water piping system 5 second pressure level P2 reaches a certain predefined reference level Rl.
- the predefined reference level Rl may be varied order to fulfil the requirements of a specific waste water piping system 5.
- the air valves 1 are constructed so that the air valve 1 opens at the predefined reference level Rl.
- the air valve 1 When the air valve 1 opens, that is, when the pressure difference ⁇ between an ambient first pressure level PI, and a waste water piping system 5 second pressure level P2 reaches a predefined reference level Rl, surrounding air is allowed to flow into the waste water piping system 5 and the under-pressure in the system 5 is equalised.
- the predefined reference level Rl is set at a level so that the air valve 1 will open before the water seals of the waste water generators 21 are affected. Hence, by connecting air valves 1 to the waste water piping system 5, the water seals 25 of the waste water generators 21 in the system 5 are not affected by an under-pressure created by for example at least one of the waste water generators 21.
- the air valves 1 may be attached to the exterior of the building. According to one aspect, the air valve is attached to an outer wall of the building. Since the air valve is attachable to a vertical surface, the roof area will not have to be utilized for air valves. Hence, the roof area may be used for other purposes such as a socializing area as illustrated in figure 1.
- the air valve 1 comprises a valve housing 100 having a housing body 105, an air valve input 110, an air valve output 120 and a channel part 180 attached to the air valve input 110.
- the housing body 105 is positioned between the air valve input 110 and the air valve output 120, forming a channel for fluidly connecting the air valve input 110 with the air valve output 120.
- the air valve output 120 is arranged to be connected to a waste water pipe system 5 such as a sewage system.
- the air valve output 120 is preferably arranged to be connected to a waste water pipe 22.
- a valve seat 140 is arranged at said air valve input 110, surrounding an entry from the first channel part 180 to said housing body 105.
- a movable valve member 131 is movably arranged inside the housing body 105, said movable valve member 131 having a valve member surface 133 facing the channel part 180 and the valve seat 140.
- the air valve is capable of switching between a first state and a second state dependent on a pressure difference ⁇ between an ambient first pressure level PI, and a waste water piping system second pressure level P2.
- the pressure difference ⁇ reaches a certain predefined reference level R
- the air valve 1 opens, or in other words, switches from a first state to a second state.
- the air valve closes, or in other words, switches from a second state to a first state
- valve seat 140 may be a ring shaped edge constructed in an optimal way in order to be able to form an air tight seal together with the movable valve member 131, see figure 6.
- the movable member 131 is adapted to be positioned in the housing body 105 away from the valve seat 140, permitting ambient air to enter the housing body 105 so as to equalize waste water pipe under-pressures.
- a virtual plane A defined by the orientation of the air valve output 120 is arranged at a first angle a in relation to a virtual plane B defined by the orientation of the valve seat 140.
- the first angle a illustrated in this aspect is 90 degrees. However, the first angle a may vary. According to one aspect not illustrated, the air valve 1 is constructed with a first angle a between plane A and B in the air valve 1 is within a range of 45 to 135 degrees.
- the air valve 1 is constructed so that the direction of the main air flow MC in the channel part 180 and the direction of the main air flow MA in the adapter part 200 is at an angle of 45 to 135 degrees in relation to each other when the air valve is in a second state permitting ambient air to flow into the air valve 1.
- the air flow at different positions through the air valve 1 may vary, but the main air flow will have a certain direction, at least in the channel part 180 and in the adapter part 200.
- the air valve output 120 is arranged to be mounted on a pipe 22 in a waste water system 5, which pipe 22 has a centre line 6 arranged in angle of -45 to +45 degrees in relation to the virtual plane B defined by the orientation of the valve seat 140.
- the air valve output 120 may be defined as a circular surface connectable to an adapter part 200 or alternatively, the air valve output 120 may be defined as a part of a channel forming the outlet of the housing body 105. Hence, the air valve output 120 may be arranged at an angle in relation to a normal to the virtual plane B.
- An adapter part 200 which will be further described in figure 6 and 7, is attachable to the valve output 120.
- valve member surface 133 facing the channel part 180 and the valve seat 140 corresponds to the dimension and shape of the valve seat 140. According to one aspect, both the valve member surface 133 and the valve seat 140 are circular.
- the valve member surface 133 and the valve seat 140 are constructed so as to form a seal, preventing odours from escaping the waste water system 5 when the air valve 1 is in the first state.
- the valve member surface 133 may according to one aspect be constructed in a flexible material such as rubber and the valve seat 140 may be constructed in a hard material such as plastic, metal or ceramic.
- the valve seat 140 may be constructed in a flexible material such as rubber and the valve member surface may be constructed in a hard material, such as plastic or metal.
- the channel part 180 has an inner surface 190.
- the movable valve member 131 which is further described in relation to figure 5a and 5b, comprises a head part 142 and a protruding element 143.
- the head part 142 is movably arranged inside the housing body 105 and the protruding element 143 is slidably arranged in a supporting structure 155.
- the supporting structure 155 is arranged in the channel part 180.
- the supporting structure 155 is positioned within the channel part 180 by means of at least three supporting members 195 attached to the inner surface 190 of the channel part 180. See figure 6a and 6b for further details regarding the supporting members 195.
- the movable valve member 131 In order to achieve an optimal function of the air valve 1, the movable valve member 131 should be arranged to be able move in a vertical direction along an axis y.
- the head part 142 of the movable valve member 131 should be arranged in a horizontal direction x, and hence the virtual plane B defined by the orientation of the valve seat 140 may be aligned with a horizontal direction x.
- the head part of the movable valve member 131 is arranged in a horizontal direction x, an optimal seal between the valve member surface 133 and the valve seat 140 is achieved.
- an optimal movement of the movable valve member 131 in the supporting structure 155 and in the housing body 105 may be achieved, since when arranged in this direction, a minimal, or reduced, friction of the movable valve member 131 and the supporting structure 155 as the movable valve member 131 glides in the supporting structure is achieved.
- the first angle a may be adjusted to the third angle v of the waste water pipe 22 to which the air valve 1 is to be mounted so that the movable valve member 131 is still arranged to move in a vertical direction y.
- This construction of the air valve 1 may be achieved by the design of the air valve 1 or by the design of the adapter part 200.
- the channel part 180 is attached to the inlet 110 of the air valve 1 in order to improve the air flow through the air valve 1. Tests have shown that the flow of air through the air valve 1 can be optimized by constructing the channel part 180 with a certain length L. According to one aspect, the length L of the channel part 180 corresponds to 30-70 % of the radius of the circular valve member surface 133. According to one aspect, the length L of the channel part 180 is 35-45 % of the radius of the circular valve member surface 133.
- the air valve 1 comprises a valve housing 100 having a housing body 105 and a channel part 180.
- the channel part 180 has a certain length L.
- an adapter part 200 is illustrated.
- the adapter part 200 is connected to the air valve 1.
- the adapter part 200 is constructed in order to be able to attach the air valve 1 to a waste water pipe 22.
- the dimension of the adapter part 200 is chosen for a specific installation.
- a specific adapter part 200 is chosen for each installation in order to fit waste water pipes 22 of different dimension.
- the adapter part 200 may be constructed in order to be attached to the interior of the waste water pipe 22, as illustrated in figure 2. According to one aspect, the adapter part 200 may be constructed in order to be attached the exterior of the waste water pipe 22.
- the first layer 136 comprises protruding means facing a second layer 133.
- the protruding means may be arranged along the outer edge of the first layer 136.
- the second layer 133 is according to one aspect a flexible layer made of a material such as rubber. This flexible second layer 133 forms the valve member surface 133.
- the valve member surface is arranged to form a seal together with the valve seat 140 when the air valve 1 is in the first state.
- the radius of the second layer 133 corresponds according to one aspect to the radius of the first layer 136.
- the head part 142 comprises a third layer 137.
- the third layer 137 is formed out of a hard material, such as plastic or metal.
- the third layer 137 is arranged to stabilize the second layer 133.
- the third layer has a radius which is smaller than the radius of the second layer 133.
- the bottom view of the movable valve member 131 is illustrated in figure 5b where the valve member surface 133 is disclosed.
- the valve member surface 133 is according to this embodiment ring shaped and the dimension of the valve member surface 133 is formed in order to fit the valve seat 140 so that the valve member surface 133 and the valve seat 140 can form a seal preventing odours from escaping from the air valve 1 when the air valve 1 is in a first state.
- the valve member surface 133 is a ring shaped surface, as illustrated in figure 5b.
- Figure 5c illustrates an exploded side view of the air valve 1 and the movable valve member 131.
- the dimension and the weight of the movable valve member 131 affects the seize of the pressure difference ⁇ between an ambient first pressure level PI and a waste water piping system second pressure level P2 for which the air valve 1 switches between a first state and a second state.
- the protruding element 143 is situated inside the supporting structure 155, while the head part 142 with the valve member surface 133 arranged on the bottom of the head part 142, is sealingly resting against the valve seat 140 so as to prevent odours from leaving the housing body 105.
- the movable valve member 131 moves upwards, in a vertical direction perpendicular to the virtual plane B.
- the protruding member 143 glides or slides in the supporting structure 155, and the head part 142 moves upwards in the housing body 105, permitting ambient air to enter the air valve 1.
- the housing body 105 comprises guiding means G which prevents the head part 142 to be displaced in the housing body 105.
- the air valve 1 will remain open in a second state until the pressure difference ⁇ between an ambient first pressure level PI and a waste water piping system second pressure level P2 falls below a certain predetermined reference value R
- the pressure difference ⁇ falls below a certain predetermined reference value R
- the protruding part 143 of the movable valve member 131 slides down in the supporting structure 155 until the head part 142 and especially the valve member surface 133 reaches the valve seat 140 and the valve member surface 133 and the valve seat 140 form a seal.
- Figure 6 illustrates a top view of the valve seat 140 of the air valve 1 which valve seat 140 together with the valve member surface 133 form a seal when the air valve 1 is in the first state.
- the valve seat 140 may be a ridge formed in a hard material such as plastic or metal.
- the shape of the valve seat 140 corresponds to the shape of the valve member surface 133.
- Figure 7a and 7b schematically illustrates the supporting member 195 seen from two different directions.
- the coordinate systems illustrated in the bottom left corner illustrates the direction from which figure 7a is viewed, and the coordinate system illustrated in the bottom right corner illustrates the direction from which figure 7b is viewed.
- the supporting elements 195 are thin wing like elements with four sides. SI is arranged to be attached to the supporting structure 255 of the air valve 1, S2 is arranged to be pointing towards the valve member surface 133 of the air valve 1, S3 is arranged to be attached to the inner wall 190 of the channel part 180 of the air valve 1.
- S2 has a recess arranged to receive the third layer 137 of the valve member 131.
- S4 is according to the illustrated embodiment curved. Tests have shown that this design of the side S4 improves the airflow in the air valve 1 in comparison with supporting members without the curve shaped form.
- the supporting member 195 may have different shapes, such as being a straight line or having an uneven shape.
- the supporting member 195 is not be solid, but may comprise holes of different shapes. I n addition, the design of the support elements in the same air valve 1 may vary in order to achieve an optimal air flow through the air valve 1 and at the same time form a robust construction.
- Figure 8 illustrates the air valve 1 seen from a different view compared with the previous figures.
- the coordinate system illustrates the direction of the view of the air valve 1 in figure 8.
- the adapter part 200 in figure 8 is adapted to be inserted into a waste water pipe 22, and hence comprises ridges 206 in order to seal the connection between the air valve 1 and the waste water pipe 22.
- the adapter part 200 is arranged to be attached to a substantially vertical building element such as a wall.
- the adapter part 200 comprises protrusions 205 with openings 210 wherein each opening 210 is arranged to receive an attachment device such as a screw.
- the adapter part may comprise alternative fasting means.
- the adapter part 200 is adapted to enclose a waste water pipe 22.
- sealing elements such as ridges or similar constructions, will be arranged on the interior of the adapter part 200 (not illustrated)
- Figure 9 illustrates a cross section of a front view of the air valve 1 and the adapter part 200.
- the coordinate system illustrates the direction of the view of the air valve 1 and the adapter part 200.
- the air valve 1 is in a second state wherein air is permitted to flow into the housing body 105.
- Figure 10a and figure 10b illustrate bottom views of the air valve 1 and the adapter part 200.
- the coordinate system illustrates the direction of the view of the air valve 1 and the adapter part 200.
- the supporting structure 155 is positioned within the channel part 180 by means of four supporting members 195 attached to the inner surface 190 of the channel part 180.
- the supporting members 195 are arranged in a radial direction from the supporting structure 155 to the inner surface 190 of the channel part 180.
- the second angle ⁇ between each supporting member 195 seen in a virtual plane B defined by the orientation of the valve seat 140 (see figure 2), is equal.
- the supporting members are distributed evenly around the supporting member 155.
- the second angle ⁇ is 90 degrees.
- two of the supporting members 195 are arranged in a direction D, wherein the direction D is at an angle of 45 degrees in relation to a virtual plane A defined by the orientation of the air valve output 120.
- two of the supporting members 195 are arranged in a direction C, wherein the direction C is perpendicular to a virtual plane A defined by the orientation of the air valve output 120.
- Figure lla-llc illustrates bottom views of the air valve 1 and the adapter part 200.
- the coordinate system on the page illustrates the direction of the view of the air valve 1 and the adapter part 200.
- the supporting structure 155 is positioned within the channel part 180 by means of three supporting members 195 attached to the inner surface 190 of the channel part 180.
- the supporting members 195 are arranged in a radial direction from the supporting structure 155 to the inner surface 190 of the channel part 180.
- the second angle ⁇ between each supporting member 195 seen in a virtual plane B defined by the orientation of the valve seat 140 (see figure 2), is equal.
- the supporting members are distributed evenly around the supporting member 155.
- the second angle ⁇ is 120 degrees.
- one of the supporting members 195 is arranged in a direction C, pointing in a direction from the supporting structure 155 away from the air valve output 120. This positioning of the three supporting members 195 is position 2. This orientation of the supporting members 195 achieves a better air flow through the air valve 1 compared to the embodiment disclosed in figure 11a.
- one of the supporting members 195 is arranged in a direction C, from the supporting structure 155 in a direction C towards the air valve output 120.
- This positioning of the three supporting members 195 is position 3.
- This orientation of the supporting member achieves an even better air flow through the air valve 1 compared to the embodiments disclosed in figure 11a and lib.
- Figure 12A illustrates one aspect of the air valve 1 and the adapter part 200.
- the adapter part 200 has been adjusted in order to align with a direction of a waste water pipe 22 and at the same time the orientation of the air valve 1 is optimal, with the valve surface 133 in a horizontal direction, allowing the movable valve member 131 to move in a strictly vertical direction y for optimal movement and sealing abilities.
- the Figure 12A version of adapter 200 provides a bend by an angle w.
- the predetermined angle (w) may have a value in a range between -45 degrees to +45 degrees.
- the angle w equals the angle v when the plane B of the valve seat 140 is positioned horizontally, i.e. when the plane B of the valve seat 140 is parallel with the horizontal axis x, as illustrated in Fig. 12.
- Figure 13 illustrates a diagram showing the air flow through an air valve 1 according to one aspect.
- the graphs disclose the flow of air through the air valve 1 in a second state in relation to the height of the channel part 180.
- the graphs represent the measured values for the air flow for the three different positions, position 1, position 2, position 3 of the three supporting members 195 of the air valve, see figure lla-c for two different pressure differences ⁇ between an ambient first pressure level PI, and a second pressure level P2.
- the air valve 1 with the supporting members 195 in position 3 achieves the best air flow through the air valve 1 when the air valve 1 is open, in the second state.
- An embodiment 1 includes an air valve (1) for equalizing waste water pipe under-pressures exceeding a predetermined threshold under-pressure value while preventing odours from escaping the waste water piping system
- a valve housing (100) having: a housing body (105); an air valve input (110) ; an air valve output (120) for connection to a partly air filled waste water pipe (22), such as a sewage pipe, that may include a liquid trap seal; wherein said housing body (105) is positioned between the air valve input (110) and the air valve output (120), said housing body (105) forming a channel for fluidly connecting the air valve input (110) with the air valve output (120); wherein the valve housing (100) further comprises: a channel part (180) attached to the air valve input (110); a valve seat (140) arranged at said air valve input (110), surrounding an entry from the first channel part (180) to said housing body (105); and a movable valve member (131) movably arranged inside the housing body (105), said movable valve member (
- This solution has the advantageous effect of ensuring the integrity of liquid trap seals in the waste water piping system by equalizing under-pressure that may arise in the waste water pipe thereby also preventing odours from escaping via the liquid trap seal. This is because, when the pressure in the pipe is lower than the ambient pressure, the air valve will allow ambient air to enter so as to equalize the under-pressure, thus preventing the liquid in the liquid trap seal from being sucked away therefrom. If the liquid were sucked away from the liquid trap seal then air and sewer gases from the waste water pipe would be allowed to pass freely into the room where the liquid trap seal was installed.
- the air valve when the air valve output is fitted to an end portion of a waste pipe, the air valve may prevent odours and/or warm and moist air from flowing out from the end portion of the waste pipe.
- the provision of such an air valve even makes it possible to terminate such a waste pipe indoors while preventing odours from escaping the waste pipe.
- the provision of such an air valve also makes it possible to terminate outdoors e.g. in the vicinity of an outdoor entertainment area, such as e.g a balcony or a roof terrace, while preventing odours from affecting the air quality of the outdoor entertainment area.
- the above defined air valve has an advantageously robust design enabling the movable valve member to rest sealingly against the valve seat when the air valve is in the first state so as to prevent said odours from leaving the housing body.
- the air valve of EP 0 867 569 requires at least two valve-seat rings
- the above defined air valve enables a simplified design which may require only one valve seat. A reduction from two valve seats to one valve seat may constitute a significant reduction in the physical dimensions of the corresponding sealing area, thus increasing the reliability of the air valve sealing capacity and reducing the risk of leakage.
- the pressure difference ( ⁇ ) between an ambient pressure level (PI), and a waste water piping system pressure level (P2) constitutes the predetermined threshold under-pressure value at which waste water pipe under-pressures is equalized.
- the predetermined threshold under-pressure value may be an under-pressure value
- the predetermined threshold under-pressure value may be selected to be a lower pressure value than the under-pressure value required for sucking liquid away from the liquid trap seal.
- the predetermined threshold under-pressure value may be selected dependent on the physical dimensions of a liquid trap seal coupled to the water pipe system (5) and the predetermined threshold under-pressure value may be selected dependent on the density of the relevant liquid.
- the liquid in the liquid trap seal may be e.g. water.
- the predetermined threshold under-pressure value may be selected to be 150 Pascal.
- Providing air valve wherein the predetermined threshold under-pressure value is 150 Pascal may be suitable when the under-pressure value required for sucking liquid away from the liquid trap seal is substantially higher than 150 Pascal, such as in a range from 200 Pascal to 600 Pascal.
- the under-pressure value required for sucking liquid away from the liquid trap seal is 500 Pa
- the predetermined threshold under-pressure value is 150 Pascal
- the prior art air valve of EP 0 867 569 has two ring-shaped, horizontal sealing ridges between which ambient air can flow vertically upwards when the prior art air valve is in its open state, and a vertically positioned pipe connector for passing that ambient air vertically downwards when the prior art air valve is in its open state to the substantially vertical waste water pipe.
- the air valve of EP 0 867 569 requires the air flow to make a 180 degree change of flow direction when the air valve is in the open state
- the air valve of EP 0 867 569 is adapted for mounting at the upper end of a substantially vertical waste water pipe
- the air valve according to this aspect of the invention reduces the required change of flow direction, and it also enables mounting of the inventive air valve at a non-vertical waste water pipe.
- Embodiment 3 is an air valve according to embodiment 2, wherein the first angle (a) has a value in the range from 45 to 135 degrees.
- an optimal construction of the air valve in relation to the waste water pipe to which it is to be connected may be achieved, creating an air valve with an optimal air flow.
- the dimensions of the valve may be kept low, saving space and material costs.
- This solution has the advantageous effect of enabling this air valve to be mounted on a substantially horizontal waste water pipe which provides for a robust and space efficient mounting of the air valve.
- this air valve no extra connections or extra piping or bends have to be mounted to an essentially horizontal waste water pipe, and hence, both material and installation time is saved.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe.
- the prior art air valve of EP 0 867 569 requires mounting at the upper end of a substantially vertical waste water pipe
- the outdoors mounting of the prior art air valve would require either a vertical waste pipe exiting through the roof of the building or the addition of a substantially 90 degree bend of a substantially horizontal waste pipe to obtain the required substantially vertical waste water pipe.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe, it enables mounting of the inventive air valve directly on a substantially horizontal waste water pipe that may be allowed to exit the building through a vertical side wall of the building. In this manner the inventive air valve may be mounted at a substantially horizontal waste water pipe and, for physical stability, the body of the air valve may be attached to the vertical side wall of the building. Hence, a very robust construction is achieved.
- Embodiment 4 is an air valve according to any of embodiments 2 or 3, wherein the first angle (a) is in a range from about 60 degrees to about 90 degrees.
- the air valve according to this embodiment advantageously only requires the air flow to change its direction of flow by an angle of less than 90 degrees, while providing a robust air valve with a minimum of movable parts and a single valve seat instead of the two valve-seat rings required according to EP 0 867 569.
- this embodiment may minimize the risk for fault, while it may achieve an improved flow capacity of the air valve and maintain a minimized number of movable parts.
- the physical dimensions of the valve may be kept small, thereby saving space while maintaining an excellent air valve function in terms of equalizing waste water pipe under-pressures.
- the small dimensions of the air valve also renders a lower use of material, such as a plastic material, forming the body of the air valve, thereby rendering low material costs.
- Embodiment 5 is an air valve (1) according to embodiment 2 or any preceding embodiment when dependent on embodiment 2, wherein the air valve output (120) is arranged to be mounted on a pipe (22) in a waste water system (5), which pipe (22) has a virtual centre line (6); said virtual centre line (6) being arranged at a predetermined second angle in relation to the second virtual flat plane (B); said predetermined second angle having a value in the range from zero degrees to 45 degrees.
- This solution provides for a robust mounting of the air valve.
- the air valve is hence mounted in a robust way directly onto the wall of the building comprising the waste water pipe to which the air valve is attached.
- This construction provides for a sustainable and robust mounting of the air valve.
- the mounted air valve provides for an appealing design of the air valve which does not disturb the environment.
- Embodiment 8 is an air valve (1) according to any of embodiments 6-7 wherein the adapter part (200) comprises protrusions (205) with openings (210) wherein each opening (210) is arranged to receive an attachment device such as a screw.
- the adapter part is according to one aspect attached to a wall of a building with screws which provides for a robust construction which is simple to mount.
- Embodiment 10 is an air valve (1) according to any of embodiments 1-9 wherein said channel part (180) has a funnel shaped opening (135).
- a funnel shaped opening of the channel part further improves the flow of ambient air from the environment into the housing body and further into the waste water piping system, when the air valve is in a second state.
- the dimensions of the valve may be kept low by shaping the channel part as a funnel, saving space and material costs.
- Embodiment 11 is an air valve (1) according to any of embodiments 1-10, wherein said channel part (180) has an inner surface (190), and wherein said movable valve member (131) comprises a head part (142) and a protruding element (143), which head part (142) is movably arranged inside the housing body (105) and which protruding element (143) is slidably arranged in a supporting structure (155), which supporting structure (155) is arranged in the channel part (180), wherein the supporting structure (155) is positioned within the channel part (180) by means of at least three supporting members (195) attached to the inner surface (190) of the channel part (180).
- said movable valve member (131) comprises a head part (142) and a protruding element (143), which head part (142) is movably arranged inside the housing body (105) and which protruding element (143) is slidably arranged in a supporting structure (155), which supporting structure (155) is arranged in the channel part (180), where
- Embodiment 12 is an air valve (1) according to embodiment 11 wherein the supporting members (195) are arranged in a radial direction from said supporting structure (155) to said inner surface (195) and wherein the angle ( ⁇ ) between each supporting member (195) seen in a virtual plane (B) defined by the orientation of the first valve seat 140) is equal.
- Embodiment 13 is an air valve (1) according to any of embodiments 11-12 comprising four supporting members (195) wherein two of the supporting members (195) are arranged in a direction (D), wherein the direction (D) is at an angle of 45 degrees in relation to a virtual plane (A) defined by the orientation of the air valve output (120).
- the placements of the supporting members affect the air flow of air from the environment into the air valve when the air valve is in the second state.
- an efficient air valve is achieved.
- Embodiment 14 is an air valve (1) according to any of embodiments 11-13 comprising four supporting members (195) wherein two of the supporting members (195) are arranged in a direction (C), wherein the direction (C) is at a perpendicular angle to a virtual plane (A) defined by the orientation of the air valve output (120).
- the placement of the supporting members affects the air flow of air from the environment into the air valve when the air valve is in the second state.
- Embodiment 15 is an air valve (1) according to any of embodiments 11-12 comprising three supporting members (195), wherein one of the supporting members (195) is arranged in a direction (E), wherein the direction (E) is in a direction parallel to a virtual plane (A) defined by the orientation of the air valve output (120).
- Embodiment 16 is an air valve (1) according to any of embodiments 11-12 or 15 wherein one of the supporting members (195) is arranged in a direction (C), wherein the direction (C) is in a direction perpendicular to a virtual plane (A) defined by the orientation of the air valve output (120).
- a direction (C) wherein the direction (C) is in a direction perpendicular to a virtual plane (A) defined by the orientation of the air valve output (120).
- Embodiment 17 is a waste water piping system comprising: an air valve (1) according to embodiment 1, and a waste pipe (22) having an open end for permitting ambient air to enter the waste pipe (22) so as to equalize waste water pipe under-pressures.
- This solution has the advantageous effect of preventing odours by ensuring the integrity of water seals in the waste water piping system by equalizing under-pressure that may arise in the waste water pipe
- Embodiment 18 is a waste water piping system according to embodiment 17 wherein: the orientation of the first valve member surface (133) defines a virtual plane B having a normal nt > .
- Embodiment 19 is a waste water piping system according to embodiment 18 wherein: when said ambient air enters the open end, an average direction of air flow is in a direction parallel to the inner walls of said waste pipe, wherein said direction of air flow is at a first predetermined angle ( v ) in relation to a normal n b to the virtual plane B, said predetermined angle ( v ) is an angle smaller than 180 degrees.
- this solution has the advantageous effect of preventing odours by ensuring the integrity of water seals in the waste water piping system by equalizing under-pressure that may arise in the waste water pipe.
- this air valve may be arranged to be mounted on an essentially horizontal waste water pipe which provides for a robust and space efficient mounting of the air valve. With this air valve, no extra connections or extra piping or bends have to be mounted to an essentially horizontal waste water pipe, and hence, both material and installation time is saved.
- the air valve may be attached to for example a wall, and hence, a very robust construction is achieved in comparison with for example an air valve which is arranged to be mounted on a vertical pipe.
- the waste water pipe onto which an air valve is to be mounted is horizontal, a bend and further connections have to be created in order to be able to connect an air valve arranged to be mounted on a vertical pipe.
- the air valve gives the advantage that for example a roof area may be kept clean since the air valves connected to the waste water system of the building may be attached to the wall instead of the roof, and hence the roof space may be utilized for other purposes.
- the construction in itself allows the air to move more freely in comparison with for example the air valve disclosed in EP 0 867 569 in which the main air flow has to change direction in an angle of 180 degrees when the air valve is in the second state allowing surrounding air to enter the air valve.
- the main air flow has to change direction in an angle less than 180 degrees, which improves the flow capacity of the air valve.
- the dimensions of the valve may be kept low, saving space and material costs.
- Embodiment 20 is a waste water piping system according to embodiment 19 wherein predetermined angle (gamma) is in a range of 45-135 degrees.
- Embodiment 21 is a waste water piping system according to embodiment 19 wherein predetermined angle (gamma) is in a range of 80-100 degrees.
- Embodiment 22 is an air valve according to any preceding embodiment, wherein a cross-section of the air valve output (120) forms a first virtual flat plane (A) so that, when the air valve (1) is in the second state, said ambient air flows in an average flow direction substantially perpendicular to the first virtual flat plane (A); and the valve seat (140) defines a second virtual flat plane (B), and wherein the first virtual flat plane (A) is arranged at a first angle (a) in relation to the second virtual flat plane (B) so that the first virtual flat plane (A) is not parallel with the second virtual flat plane (B).
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a non-vertical waste water pipe.
- the air valve according to the above inventive embodiment improves the flow capacity of the valve.
- the prior art air valve of EP 0 867 569 has two ring-shaped, horizontal sealing ridges between which ambient air can flow vertically upwards when the prior art air valve is in its open state, and a vertically positioned pipe connector for passing that ambient air vertically downwards when the prior art air valve is in its open state to the substantially vertical waste water pipe.
- the air valve of EP 0 867 569 requires the air flow to make a 180 degree change of flow direction when the air valve is in the open state
- the air valve of EP 0 867 569 is adapted for mounting at the upper end of a substantially vertical waste water pipe
- the air valve according to this aspect of the invention reduces the required change of flow direction, and it also enables mounting of the inventive air valve at a non-vertical waste water pipe.
- an optimal construction of the air valve in relation to the waste water pipe to which it is to be connected may be achieved, creating an air valve with an optimal air flow.
- the dimensions of the valve may be kept low, saving space and material costs.
- This solution has the advantageous effect of ensuring the integrity of liquid trap seals in the waste water piping system by equalizing under-pressure that may arise in the waste water pipe thereby also preventing odours from escaping via the liquid trap seal. This is because, when the pressure in the pipe is lower than the ambient pressure, the air valve will allow ambient air to enter so as to equalize the under-pressure, thus preventing the liquid in the liquid trap seal from being sucked away therefrom. If the liquid were sucked away from the liquid trap seal then air and sewer gases from the waste water pipe would be allowed to pass freely into the room where the liquid trap seal was installed.
- the air valve when the air valve output is fitted to an end portion of a waste pipe, the air valve may prevent odours and/or warm and moist air from flowing out from the end portion of the waste pipe.
- the provision of such an air valve even makes it possible to terminate such a waste pipe indoors while preventing odours from escaping the waste pipe.
- the provision of such an air valve also makes it possible to terminate outdoors e.g. in the vicinity of an outdoor entertainment area, such as e.g a balcony or a roof terrace, while preventing odours from affecting the air quality of the outdoor entertainment area.
- the above defined air valve has an advantageously robust design enabling the movable valve member to rest sealingly against the valve seat when the air valve is in the first state so as to prevent said odours from leaving the housing body.
- the air valve of EP 0 867 569 requires at least two valve-seat rings
- the above defined air valve enables a simplified design which may require only one valve seat. A reduction from two valve seats to one valve seat may constitute a significant reduction in the physical dimensions of the corresponding sealing area, thus increasing the reliability of the air valve sealing capacity and reducing the risk of leakage.
- the pressure difference ( ⁇ ) between an ambient pressure level (PI), and a waste water piping system pressure level (P2) constitutes the predetermined threshold under-pressure value at which waste water pipe under-pressures is equalized.
- the predetermined threshold under-pressure value may be an under-pressure value
- the predetermined threshold under-pressure value may be selected to be a lower pressure value than the under-pressure value required for sucking liquid away from the liquid trap seal.
- the predetermined threshold under-pressure value may be selected dependent on the physical dimensions of a liquid trap seal coupled to the water pipe system (5) and the predetermined threshold under-pressure value may be selected dependent on the density of the relevant liquid.
- the liquid in the liquid trap seal may be e.g. water.
- the predetermined threshold under-pressure value may be selected to be 150 Pascal.
- Providing air valve wherein the predetermined threshold under-pressure value is 150 Pascal may be suitable when the under-pressure value required for sucking liquid away from the liquid trap seal is substantially higher than 150 Pascal, such as in a range from 200 Pascal to 600 Pascal.
- the underpressure value required for sucking liquid away from the liquid trap seal is 500 Pa
- the predetermined threshold under-pressure value is 150 Pascal
- the prior art air valve of EP 0 867 569 requires mounting at the upper end of a substantially vertical waste water pipe
- the outdoors mounting of the prior art air valve would require either a vertical waste pipe exiting through the roof of the building or the addition of a substantially 90 degree bend of a substantially horizontal waste pipe to obtain the required substantially vertical waste water pipe.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe, it enables mounting of the inventive air valve directly on a substantially horizontal waste water pipe that may be allowed to exit the building through a vertical side wall of the building.
- the inventive air valve may be mounted at a substantially horizontal waste water pipe and, for physical stability, the body of the air valve may be attached to the vertical side wall of the building. Hence, a very robust construction is achieved.
- Example E2 The air valve according to Example El, wherein the first angle (a) is in a range from 85-100 degrees.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe.
- the prior art air valve of EP 0 867 569 requires mounting at the upper end of a substantially vertical waste water pipe
- the outdoors mounting of the prior art air valve would require either a vertical waste pipe exiting through the roof of the building or the addition of a substantially 90 degree bend of a substantially horizontal waste pipe to obtain the required substantially vertical waste water pipe.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe, it enables mounting of the inventive air valve directly on a substantially horizontal waste water pipe that may be allowed to exit the building through a vertical side wall of the building.
- Example E3 The air valve according to any perceeding Example E, wherein the first angle (a) is substantially perpendicular.
- This solution has the advantageous effect of enabling this air valve to be mounted on a substantially horizontal waste water pipe which provides for a robust and space efficient mounting of the air valve. With this air valve, no extra connections or extra piping or bends have to be mounted to an essentially horizontal waste water pipe, and hence, both material and installation time is saved.
- the air valve disclosed in EP 0 867 569 requires mounting at the upper end of a substantially vertical waste water pipe
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe.
- the prior art air valve of EP 0 867 569 requires mounting at the upper end of a substantially vertical waste water pipe
- the outdoors mounting of the prior art air valve would require either a vertical waste pipe exiting through the roof of the building or the addition of a substantially 90 degree bend of a substantially horizontal waste pipe to obtain the required substantially vertical waste water pipe.
- the air valve according to this aspect of the invention advantageously enables mounting of the inventive air valve at a substantially horizontal waste water pipe, it enables mounting of the inventive air valve directly on a substantially horizontal waste water pipe that may be allowed to exit the building through a vertical side wall of the building.
- Example E4 The air valve according to any of Example E1-E3, wherein said channel part (180) comprises a channel part wall, said channel part wall extending in a direction substantially perpendicular to the plane (B) of the valve seat (140) so as to form said channel part (180), and wherein a distance (L) from the plane (B) of the valve seat (140), along a normal to the plane (B), to an end of the channel part wall defines a channel part length (L) of said channel part (180); and wherein the valve seat (140) encloses said air valve input (110), said air valve input (110) having an inlet cross-sectional area; and wherein the channel part length (L) is longer than 20% of the square root of the inlet cross- sectional area, and the channel part length (L) is shorter than 80% of the square root of the inlet cross-sectional area.
- Example E5. The air valve according to any of Example E1-E3, wherein said channel part (180) comprises a channel part wall, said channel part wall extending in a direction substantially perpendicular to the plane (B) of the valve seat (140) so as to form said channel part (180), and wherein a distance (L) from the plane (B) of the valve seat (140), along a normal to the plane (B), to an end of the channel part wall defines a channel part length (L) of said channel part (180); and wherein said the valve seat (140) is ring shaped so as to enclose said air valve input (110), said ring shaped valve seat (140) having a valve seat radius; and wherein the channel part length (L) is longer than 30% of said valve seat radius, and the channel part length (L) is shorter than 70% of said valve seat radius.
- Example E9 The air valve (1) according to any of Example E1-E8 wherein an adapter part (200) is attached to the valve output (120), wherein said adapter part (200) is arranged to be attached to a waste water pipe (5).
- Example E10 The air valve according to any of Example E1-R9, wherein the predetermined threshold value may be selected to be a lower pressure value than that required for sucking liquid away from the liquid trap seal.
- This solution has the advantageous effect of ensuring the integrity of liquid trap seals in the waste water piping system by equalizing under-pressure that may arise in the waste water pipe thereby also preventing odours from escaping via the liquid trap seal. This is because, when the pressure in the pipe is lower than the ambient pressure, the air valve will allow ambient air to enter so as to equalize the under-pressure, thus preventing the liquid in the liquid trap seal from being sucked away therefrom. If the liquid were sucked away from the liquid trap seal then air and sewer gases from the waste water pipe would be allowed to pass freely into the room where the liquid trap seal was installed.
- the predetermined threshold value is a value corresponding to the weight of the movable valve member (131).
- the predetermined threshold under-pressure value may be an underpressure value corresponding to the weight of the movable valve member (131).
- the force required to open the valve may depend on the weight of the movable valve member and on the surface areas of the movable valve member subjected to the ambient pressure level (PI), and the waste water piping system pressure level (P2), respectively.
- the predetermined threshold under-pressure value may be selected to be a lower pressure value than the under-pressure value required for sucking liquid away from the liquid trap seal.
- This solution has the advantageous effect of enabling this air valve to be mounted on a substantially horizontal waste water pipe which provides for a robust and space efficient mounting of the air valve.
- this air valve no extra connections or extra piping or bends have to be mounted to an essentially horizontal waste water pipe, and hence, both material and installation time is saved.
- Example E13 The air valve (1) according to any of Example E1-E7 wherein the
- predetermined threshold value is lower than 250 Pascal.
- Example E14 A waste water piping system comprising: said waste water pipe (22) and the air valve (1) according to any of the preceeding Examples E1-E13 so as to equalize waste water pipe under-pressures.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1600325 | 2016-11-15 | ||
SE1750054A SE542035C2 (en) | 2016-11-15 | 2017-01-23 | A waste water piping system |
PCT/SE2017/051134 WO2018093321A1 (en) | 2016-11-15 | 2017-11-15 | Waste water piping system and an air valve |
Publications (2)
Publication Number | Publication Date |
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EP3542001A1 true EP3542001A1 (en) | 2019-09-25 |
EP3542001A4 EP3542001A4 (en) | 2020-07-22 |
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ID=62488835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17872546.1A Pending EP3542001A4 (en) | 2016-11-15 | 2017-11-15 | Waste water piping system and an air valve |
Country Status (3)
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EP (1) | EP3542001A4 (en) |
JP (1) | JP7040879B2 (en) |
SE (1) | SE542035C2 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR102475401B1 (en) * | 2020-12-16 | 2022-12-08 | 박영범 | drain system for integrated bent at an apartment |
Family Cites Families (11)
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FR2402140A1 (en) * | 1977-08-31 | 1979-03-30 | Ericson Sture | Ventilated, siphon sealed, drain water collection pot - has valve preventing air leaving but allowing it to enter when internal pressure drops |
ES273804Y (en) * | 1982-07-29 | 1984-08-01 | Kentsub Limited | VALVE FOR AIR INTAKE |
JP3808933B2 (en) * | 1996-04-24 | 2006-08-16 | 前澤化成工業株式会社 | Intake valve |
US5971014A (en) * | 1996-09-04 | 1999-10-26 | Duren; Gary S. | Vacuum breaker valve vent fitting clean-out device |
JP4184416B2 (en) * | 2001-05-28 | 2008-11-19 | 株式会社キッツ | Drainage vent |
US20090044321A1 (en) * | 2007-08-17 | 2009-02-19 | Selman Fred J | Sewer and septic tank venting device |
JP5102053B2 (en) * | 2008-01-22 | 2012-12-19 | 株式会社キッツ | Ventilator for merging |
CN201909075U (en) * | 2011-01-10 | 2011-07-27 | 上海高桥水暖设备有限公司 | Vacuum breaker |
GB2502527B (en) * | 2012-05-28 | 2018-07-18 | Mcalpine & Co Ltd | Plumbing apparatus |
JP2015055070A (en) * | 2013-09-11 | 2015-03-23 | クボタシーアイ株式会社 | Drainage system |
JP6587313B2 (en) * | 2015-02-20 | 2019-10-09 | 株式会社長谷工コーポレーション | Gradient drainage system |
-
2017
- 2017-01-23 SE SE1750054A patent/SE542035C2/en unknown
- 2017-11-15 EP EP17872546.1A patent/EP3542001A4/en active Pending
- 2017-11-15 JP JP2019521431A patent/JP7040879B2/en active Active
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SE1750054A1 (en) | 2018-05-16 |
EP3542001A4 (en) | 2020-07-22 |
SE542035C2 (en) | 2020-02-11 |
JP2020501042A (en) | 2020-01-16 |
JP7040879B2 (en) | 2022-03-23 |
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