WO1980002577A1

WO1980002577A1 - Ventilation means in a water-closet

Info

Publication number: WO1980002577A1
Application number: PCT/SE1980/000132
Authority: WO
Inventors: P Magnusson
Original assignee: Lagerstedt & Krantz Ab; P Magnusson
Priority date: 1979-05-16
Filing date: 1980-05-06
Publication date: 1980-11-27
Also published as: IT1127044B; IT8048670A0; FR2456815A1; FR2456815B3; FI75386B; BE883301A; GB2076445B; FI801542A; SE418516B; FI75386C; SE7904292L; GB2076445A

Abstract

Ventilation means in a water-closet for removing nasty smelling air in the associated lavatory space. In the water-closet, channel means is provided between the lavatory bowl (22) and the drain pipe (2) of the water-closet, via the flushing tank (24). A suction valve (8) operating as a non-return valve is provided in said channel means and is placed in a house in the air space (3) of the flushing tank (24) for opening said channel means in response to a negative pressure on the drain side in respect of the other side. Said house includes a blower for producing said negative pressure therein. A switch for actuating the blower is the same switch arranged for actuating the illumination in the lavatory space.

Description

VENTILATION MEANS IN A WATER-CLOSET

TECHNICAL FIELD The present invention relates to ventilation means in a water-closet for removing bad and nasty smelling air from lavatory spaces.

In lavatory spaces there are often problems in removing bad or nasty smelling air. It is true that lavatory spaces shall be and often are provided with a ventilator for supplying fresh air but this ventilator often is in¬ sufficient for removing to a desired extent bad and nasty smelling air.

PRIOR ART In Swiss Patent Specification No. 380,670, German Patent Specifica¬ tion No. 873,828 and German Offenlegungsschrift No. 1,658,269 various means for ventilation of bad air from a water-closet are described. However, said prior art means is considered complicated or having unreliable operation.

PURPOSE OF THE INVENTION The object of the invention is to propose ventilation means which allows rapid and effective removal of bad air from lavatory spaces, which means is simple and reliable and is suitable for use in a water-closet having a flushing tank located adjacent the lavatory chair.

This object is achieved by means of ventilation means in a water-clo¬ set including a lavatory chair with a lavatory bowl and a flushing tank, ^• a flushing channel communicating with the flushing tank viaa valve. Channel means is provided from the lavatory bowl to the drain pipe of the water- closet via the flushing tank. In accordance with the invention a non-return valve is provided in said channel means for closing the same, said valve being openable at a negative pressure on the drain side in respect of the other side in order to achieve via the flushing tank a communication between the lavatory bowl and the drain pipe.

OMPI /,, WIPO __*, Preferably said non-return valve is a suction valve (8) placed in a house having an outlet connected to a pipe in said channel means opening out in the drain pipe. A blower may be provided in the house for producing a negative pressure therein. BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in detail below with reference to the enclosed drawing.illustrating a preferred embodiment.

Fig. 1 is a cross-section view of a water-closet, and illustrates an embodiment of the invention. Fig. 2 is a cross-section view-illustrating the vlower and the valve in Fig. 1 at an enlarged scale.

Fig. 3 is a top plan view showing the house of the blower and the valve in the water-closet flushing tank. PREFERRED EMBODIMENTS^' OF THE INVENTION AMD INDUSTRIAL APPLICABILITY The generally traditionally designed water-closet 1 shown in a cross- section in Fig. 1 includes a lavatory chair provided with a base 21 support ing a lavatory bowl 22 having a connecting, upwardly bent exhaust pipe 23 for forming a drain trap. On the upper, back portion of the lavatory chair a flushing tank 24 is provided for storing water to be used for flushing the lavatory bowl 22. The inner space of flushing tank 24 is connected to the lavatory bowl 22 through a channel 25 and an aperture (not shown) in it bottom, which aperture is provided with a -manually operable valve (not shown) for permitting delivery of water from the flushing tank into lava¬ tory bowl 22 for flushing out excrements. When said valve is opened water flows through channel 25 and out into a downwardly open channel 26 at the upper edge of the lavatory bowl 22 in order to thereafter flow down into the interior space of the lavatory bowl. A spillway, here shown formed as an overflow pipe 5 which at one end is fixed to the bottom of the flushing tank, communicates with channel 25 and extends vertically up through flush- ing tank 24, its other end opening out at a distance from the upper wall of the flushing tank; said wall here being comprised of a cover 18 closing against the shell of the flushing tank; said cover being removable in order to permit access to the interior of the flushing tank.

A not shown float controlled valve is provided in a traditional manne for controlling the delivery of flushing water through flushing tank 24 fro a not shown supply pipe for water and for maintaining normally the upper level of the water in flushing tank 24 below the upper edge of overflow, pip

5.

A drain pipe 2 i s shown connected to the exhaust pipe 23 of the l ava- tory chai r by means of a sui tabl e connector. ^^ J REA OMPI In accordance with the invention channel means for the removal of air is constituted between lavatory bowl 22 and drain pipe 2 over channel 25, overflow pipe.5 and flushing tank 24. The connection between flushing tank 24 and drain pipe 2 is made by means of a pipe 6 which from the upper space 3 of the flushing tank extends through the bottom of the flushing tank and opens out into drain pipe 2. Preferably, the upper end of pipe

6 opens out above the upper edge of overflow pipe 5, such that water will not flow down through pipe 6 at a malfunction of the not shown float valve controlling the delivery of water to flushing tank 24. In the air space 3 of flushing tank 24 a blower 4, having an impeller

7 driven by a low-voltage motor 11, is provided at a level abowέ the upper end of overflow pipe 5. Preferably, said blower 4 is a centrifugal blower as shown on the drawing. Blower 4 includes a blower house supported in the flushing tank and shaped as a casing 31 including an inlet 32 and an outlet 33, said casing at its outlet being fixed and supported by commu¬ nication pipe 6 at the upper end thereof. Said casing has two chambers, viz. an upper chamber 34 which accomodates the impeller 7, and a lower chamber 35. Inlet 32 into lower chamber 35 is shown on the drawing (Fig. 1). located vertically above overflow pipe 5 but can also be placed at a side in respect of said pipe. A communication between the upper and the lower chamber is provided adjacent to the suction side of impeller 7 in order that air from overflow pipe 5 and the upper space of the flushing tank shall be able to be driven out to drain pipe 2 by means of the impeller. Consequently, the pressure side of impeller 7 is provided adjacent to the upper end of connection pipe 6.

. Low-voltage motor 11 of the blower is placed on the upper wall of said casing through which the motor shaft extends and is connected to the impeller.

In said casing 31 a suction valve 8 operating as a non-return valve is provided in order to prevent air from drain pipe 2 to penetrate over communication pipe 6 into the flushing tank and through overflow pipe 5 into lavatory bowl 22. Said suction valve 8 is arranged to open at a vacuum in the casing or a positive pressure outside the casing in air space 3 of flushing tank 24 in order to permit air to be exhaustdd by suction from said lavatory space into drain pipe 2 over lavatory bowl , .spillway 5, casing 31 and pipe 6.

On .the drawing a preferred embodiment of suction valve 8 is shown in Figs. 1 and 2, said valve being provided at inlet 32 of casing 31. Suc¬ tion valve 8 includes a valve plate 9 in lower chamber 35, said plate being supported on a central spindle 27. The outer portion of said plate closes against a flange or collar 10 running around the inlet. In order to impro the closure the side of said plate facing the collar is provided with a sealing member 15 for sealing against the collar. Spindle 27 is supported in a central sleeve 28 in the inlet, said sleeve being secured by radial cross members 16. Spindle 27 is easily movable upwards and downwards in sleeve 28. At the lower end of the spindle which projects beyond the lowe end of the sleeve stops 14 are provided for preventing the spindle from being lifted entirely out of the sleeve.

Ordinarily suction valve 8 is in its rest position, i.e. closes the inlet to casing 31. When the blower is started plate 9 is lifted upwards under action of the suction force from the impeller and the plate takes the position shown in Fig. 2 with dotted lines where suction valves is entirely open.

Fan motor 11 is connected over electric cables 37 to the low voltag ^'side of a transformer 12. The high voltage side of the transformer is con nected to the municipal supply mains. A switch 13 is provided for actuatin the blower.

In accordance with a particulary preferred embodiment switch 13 is switch for the illumination in the lavatory space, an illumination device being connected over the high voltage side of said transformer. In this ca the blower is energized at the same time as the illumination in the lavato ry space is energized and is maintained energized during the whole time th lavatory space is used, i.e. until the illumination in the lavatory space turned out. Of course, switch 13 can be a separate switch which is located on a suitable place in the lavatory space. Moreover, a device which separa ly interrupts the current to the blower after a predetermined time can be connected into the electric circuit to the blower, the blower thereby, af being energized, being disconnected after a predetermined time although switch 13 is not opened for some reason. When switch 13 is the same switch as is used for the illumination of the lavatory space, a particularly suitable operation for blower 4 is obta since the illumination generally is turned on and is maintained lighted wh the lavatory space is occupied, and is turned off and kept off when the la tory space is unoccupied. In that way the blower will operate during the time when there is the greatest need for removing bad air, if any, from th lavatory space.

Here said ventilating means has been disclosed with reference to a t ditional water-closet where the flushing tank is placed on the lavatory ch However, it is realized that the invention is not restricted to such a wat closet but can be applied in any water-closet irrespective of the location v^'3Ε

Claims

1. In a water-closet having a flushing tank (24) for storing flushing water, ventilation means for the removal of nasty smelling air from the water-closet and its associated lavatory space, said water-closet having a lavatory bowl (22) with a flushing channel (25) communicating with the flushing tank via an openable valve, and having in the flushing tank (24) a spillway (5) communicating with the lavatory bowl (22), and a communica¬ tion pipe (6) between the upper space (3) of the flushing tank and a drain pipe (2) from the water-closet, for constituting channel means (25, 5, 4, 6) from the layatory bowl (22) via the flushing tank (24) to the drain pipe (2), c h a r a c t e r i z e d in that a non-return valve (8) is provided in said channel means (25, 5, 4, 6) for closing the same, said valve (8) being openable at a negative pressure on the drain side of said channel means in respect of the other side of said channel means in order to achieve via the flushing tank (24) a communication between the lavatory bowl (22) and the drain pipe (2).

2. Means as claimed in claim 1, c h a r a c t e r !^' z e d in that said non-return valve is a suction valve (8) placed in a house (31) in the upper space (3) of the flushing tank (24), said house having an in¬ let (32) in communication with said space (3) and an outlet (33) connected to said communication pipe (6).

3. Means as claimed in claim 2, c h a c t e r i z e d in that said suction valve (8) includes an axiaily displaceable, easily travelling valve plate (9) which in its closed position seales against a collar (10) in the house (31).

4. Means as claimed in claim 3, c h a r a c t e r i z e d in that the valve plate (9) of said suction valve is supported on a vertically arranged spindle (27).

5. Means as claimed in any one of claims 1 to 4, c h a r a c t e r i- z e d in that a blower (4) is provided in the upper space (3) of said flushing tank in order to act on the suction valve (8) and to drive air through said channel means into the drain pipe (2).

6. Means as claimed in claim 5, c h a r a c t e r i z e d in that the impeller (7) of the blower (4) is located in the house (31).

7. Means as claimed in claim 6, c h a r a c t e r i z e d in that said suction valve (8) is located in .the inlet (32) of the house, and said impeller (7) is provided with its suction side communicating with the suction valve (8) and its pressure side communicating with the drain pipe (2).

^■ ΕE $>*

OMPI

8. Means as claimed in any one of claims 5 to 7, c h a r a c t e r i z e d in that said blower (7) is driven by a low voltage motor (11) which over a transformer is connected to a light switch (13) for . illumination means (38) in the space where said water-closet is placed.