REMOVAL OF ODOURS FROM TOILET BOWL
A toilet bowl or urinal, or water trap has an outlet connected to a source of negative pressure such as an extraction fan, the outlet being located above the water trap in the bowl or urinal and unconnected to either the soil water pipe or the flush water pipe. The inlet to the trap includes a portion below and a portion above the level of the water in the trap.
This invention relates to the removal of odours from a toilet bowl, urinal, or water trap and is of particular relevance to local exhaust ventilation for toilet bowls, and urinal bottle traps. However, the invention is also applicable to water traps for basins.
BACKGROUND ARTThe prior art is replete with ideas associated with the removal of foul odours emanating from toilet bowls.
Many of the prior art arrangements involve the provision of large volumes of air under pressure in order to transport the foul odours to a zone from which they can be vented to the atmosphere. These arrangements require substantial air blowers or fans to effect suitable transport of the odours. Thus, recent developments are aimed at local exhaust ventilation using much smaller items of equipment with concomitant lesser energy use.
Most of the prior art pertains to the provision of a fan to draw the foul air from the bowl through a suction line connected to the flush water conduit. This has the disadvantage that water from the flush water is drawn into the suction line.
In order to minimize this disadvantage it has been proposed, for example in WO03049587 to draw air from the bowl through a channel extending across the rear of the seat of the toilet but this is costly and inefficient.
French patent 2555886 has a similar arrangement.
In DE 4311066 an extractor fan is seated in a closed suction-extraction line connected to the outlet of the soil water pipe. This leads to the problem of dealing with the odours from the soil water pipe.
British Patent 2305944 also involves the flush water pipe and requires a complicated system of pipes with a float valve.
In US2007017010 has a fan chamber that draws odours from a location at the top of the toilet bowl and leads the malodours through a pipe joined to the sewer pipe. This is complicated and does not solve the problem.
It is an object of the present invention to provide a simple design for a toilet bowl in which the odour extraction outlet is conveniently located to avoid the problems associated with prior art arrangements, and in particular aims to reduce energy requirements substantially.
DISCLOSURE OF THE INVENTIONAccording to the invention a toilet bowl or urinal or water trap includes an outlet connectible to a source of negative pressure such as an extractor fan or the like, the entrance to the outlet being located above the water trap in the toilet bowl or urinal and being unconnected either to the soil water pipe or the flush water pipe.
Thus, the malodours are neither drawn through the soil water outlet nor are they in contact with flush water.
Other advantages of the present invention include the fact that the outlet is in close proximity with the water at the bottom of the bowl or water trap so that the concentrated bad odours originating from the water in the trap are immediately drawn by the fan to a suitable location where they are inoffensive. This arrangement only requires a small unit extractor fan or the like.
The odour outlet pipe may be formed integrally with the toilet bowl or urinal, or water trap, such as a bottle trap.
The invention extends to a water trap, for example a bottle trap which, instead of having a single outlet (soil water outlet) as in conventional bottle traps, includes an additional outlet adapted to be connected to a low pressure source (extractor fan). Such an arrangement may replace the conventional bottle trap for a urinal in order for the arrangement to benefit from the advantages of the present invention.
In an example of the invention a bottle trap for a urinal, basin or the like, includes an inlet for fluid and an outlet whose entry is above the water level, the fluid inlet is above the level of the water and is in communication with an annulus defined by the inlet and the housing; the annulus including baffle means adapted to seal the outlet from the annulus, and a second outlet including means to draw air from the annulus.
The rear wall of the toilet bowl may include a chute, a portion of which may be located below the level of the water in the trap, the remaining portion being above the level of the water. Thus, the opening of the chute is above the level of the water and at the same time prevents odours from exiting through the soil water pipe.
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
In
Turning to
The outlet 20 may be located at the rear or at the side or even the front of the toilet bowl.
In
In
A refinement is illustrated in
In
In
A baffle 130 is associated with the down-pipe 122 which discharges urine into the trap 120. The baffle separates the outlet 128 from the foul air in the waste pipe. The chamber 134 collects the bad odours from the trap and which are drawn through outlet 128.
In
It will be appreciated that a similar arrangement may be provided for a basin such as a dishwashing basin.
Claims
1-6. (canceled)
7. A bottle trap for a urinal, basin or the like, including an inlet for fluid and an outlet whose entry is above the water level, characterised in that the exit of the fluid inlet is above the level of the water and is in communication with an annulus defined by the inlet and the housing; the annulus including baffle means adapted to seal the outlet from the annulus, and a second outlet including means to draw air from the annulus.
8. The bottle trap as claimed in claim 7 characterised in that the outlet is in close proximity with the water at the bottom of the water trap for the concentrated malodours originating from the water in the trap to be immediately drawn through the outlet to a suitable location where they are inoffensive.
9. The bottle trap according to claim 7 characterised in that the odour outlet pipe is formed integrally with the trap.
10. The bottle trap according to claim 8 characterised in that the odour outlet pipe is formed integrally with the trap.
11. The bottle trap according to claim 7 characterised in that the means to draw the air from the annulus includes an extractor fan.
12. The bottle trap according to claim 8 characterised in that the means to draw the air from the annulus includes an extractor fan.
13. The bottle trap according to claim 9 characterised in that the means to draw the air from the annulus includes an extractor fan.
14. The bottle trap according to claim 10 characterised in that the means to draw the air from the annulus includes an extractor fan.
Type: Application
Filed: Aug 23, 2010
Publication Date: Sep 27, 2012
Inventor: Dylan Hugh Ross-Kent (Dunkirk Estate)
Application Number: 13/509,009
International Classification: E03D 9/052 (20060101);