DE20008281U1 - Air extraction device for toilet bowls - Google Patents

Description

Title: Air extraction device for toilet bowls

State of the art:

Air extraction devices in shower / bath and toilet rooms are in the form of electric fans which are installed on the ceiling or in the masonry

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are known. The room air is sucked in and blown by the electric fan either directly outside or into an exhaust air duct. The fan is controlled via the light switch and, if necessary, with a follow-up control.

Systems of this type are mainly used in so-called wet rooms and rooms with poor ventilation and serve to increase air exchange. This firstly reduces humidity and secondly reduces unpleasant odors.

Due to the imbalance between room air and fan flow, only a small portion of the room air is exchanged in the corresponding time, and odor particles in particular are incompletely eliminated in a shorter time, so that unpleasant odors can occur if the toilet is used frequently.

Problem:

The invention specified in claim 1 is based on the problem of creating an extraction device which immediately extracts odor particles from faeces in the area of the toilet bowl in order to avoid mixing of odor particles with the room air.

For an air extraction device of the type mentioned at the beginning, this task is solved by a device which sucks the air directly out of the toilet bowl and blows it into the drain pipe. The advantages achieved with the invention are in particular that the air contaminated with odor particles is sucked out at the point of origin, thus preventing it from mixing with the rest of the room air. By using the drain pipe as an exhaust air pipe and the water inlet pipe as an intake pipe, simple and inexpensive installation in existing and new toilet systems is possible.

The air extraction device is activated automatically when the toilet is used.

Embodiments according to the features of the invention are described in more detail below with reference to the drawings. They show:

Fig. I Schematic side view of the air extraction device with toilet

Fig. &Pgr; Schematic side view of the reducers with fan and electromagnetic valve

Fig III Block diagram of a version with infrared sensor

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In further terms:

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1 toilet

2 Water inlet pipe

3 Branch pipe 45°

3a Opening branch pipe

4 Plastic pipe diameter 40mm B Plastic pipe diameter 50mm 5a Reducer 50 to 40mm 5b Reducer 50 to 40mm 5c Inner pipe

6 Electromagnetic valve

6a Valve divider

6b Spring

7 Drain pipe

8 Toilet bowl

9 Rubber seal

10 Electric fan

11 Water castle

12 Sensor

13 Cistern

Air extraction device for toilet bowls, characterized in that a 45° branch pipe with a diameter of 40mm (3) is connected to the water inlet pipe (2) of the toilet (1) in such a way that incoming water flows in the direction of the toilet bowl (8) and air can be sucked out of the toilet bowl via the opening (3a). For this purpose, an opening (3a) of the branch pipe is connected to a plastic pipe with a diameter of 50mm (5) via a plastic pipe with a diameter of 40mm (4), which can also be designed as a flexible pipe. This plastic pipe (5) consists of two

identical reducers 50 to 40mm (5 a and b) which are connected to each other by an inner pipe (5 c) so that the pipe diameter is 40mm at both ends and the diameter of the pipe in the middle is 50mm. An electric fan (10) is built into the reducer (5 a) so that it sucks air out of the toilet bowl. The second reducer (5b) carries an electromagnetic valve (6). The outlet of the reducer (5 a) is in turn connected to the drain pipe (7) of the toilet via a plastic pipe with a diameter of 40mm (4b). The fan (10) built into the reducer (5a) pipe is designed as a 12 volt direct current motor which operates in series with the electromagnetic valve via a rectifier at 220 volt alternating current. The control is carried out via a sensor (pressure, light barrier, infrared) and a timer circuit (run-on control). The electromagnetic

Valve (6) works as a holding magnet. When current flows through the valve, it opens, allowing air to flow from the toilet bowl into the waste pipe. When the fan stops, the valve is closed and prevents air from rising from the waste pipe. All pipe parts are made of plastic, and the connections between the individual plastic pipes are sealed with rubber seals (9). The diameter of the plastic pipes is variable and can be adapted to the circumstances.

The device is activated automatically by known systems such as pressure switches, light barriers or infrared sensors. In all cases, a known run-on control is used for the duct fan

Claims (4)

1. Air extraction device for toilet bowls, characterized in that a connection is made between the water inlet pipe ( 2 ) and the waste water pipe ( 7 ) of a toilet by means of several interconnected plastic pipes ( 3 , 4 , 5 ). 2. Air extraction device for toilet bowls according to protection claim 1, characterized in that an electric fan ( 10 ) and an electromagnetic valve ( 6 ) are installed in the plastic pipe ( 5 a, b) in such a way that air can be extracted from the toilet bowl ( 8 ) and air rising from the waste pipe ( 7 ) is prevented. 3. Air extraction device for toilet bowls according to one of the preceding claims, characterized in that the pipe connection can also exist between the toilet bowl and an exhaust air duct. 4. Air extraction device for toilet bowls according to one of the preceding claims, characterized in that the air extraction from the toilet bowl is also possible by bypassing the water inlet pipe.