GB2096662A - Ventilating water closet pans - Google Patents

Abstract

A small chamber (3) at the rear of a w.c. pan (1) houses a motor driven fan (4) preferably actuated by a seat switch. The fan (4) draws air from the pan via an integral duct (7) whose upper end (8) is located above the flush water supply pipe (6). The fan (4) discharges the air through duct (11) into the wastepipe (2). When a person sits on the seat (14), a spring- connector actuates the fan motor. The result is that the fan (4) draws off the smell and any excess moisture in the pan (1) and directs them to the wastepipe (2). <IMAGE>

Description

SPECIFICATION Exhaust device for toilet fitting The present invention is designed to improve toilet fittings, and comprises an exhaust device for removing the smell and excess moisture from the toilet bowl.

The smell emitted from excrement diffuses into the atmosphere inside the toilet and into its environment, resulting in undesirable and unsanitary conditions. Generally, excess moisture from excrement causes discomfort and unsanitary conditions for the user.

Accordingly, the object of the present invention is to improve a toilet fitting by providing an exhaust device for removing the smell in the toilet bowl by means of an aspirator which is mounted in a chamber at the rear of the fitting.

The present invention comprises an exhaust system for removing the smell in the toilet bowl and comprises a motor driven aspirator that is located in a small chamber. A person's weight on the seat activates the motor, which drives the aspirator, to remove the undesirable smells of excrement, through an aspirator pipe and an exhaust pipe leading to the outlet. The object of the invention is accomplished by an exhaust device, comprising a motor driven aspirator in the chamber.

The exhaust device of the invention does not result in a toilet fitting larger than conventional fittings. It is possible for a small chamber to accommodate the motor driven aspirator.

This feature and other advantages of the present invention will be better understood through consideration of the specification that follow, in conjunction with the attached drawings, in which: Figure 1 is a perspective view showing a toilet fitted with an embodiment of the present invention; Figure 2 is a longitudinal side section view of the above; and Figure 3 is a longitudinal cross-sectional view of the above.

The structural features of the present invention as shown in Figures 1-3, will be described.

A chamber 3 is located behind the wastepipe 2 of the toilet fitting 1. The chamber 3 is equipped with an aspirator 4 driven by a motor 5. The basin 1 is additionally equipped with an aspirator pipe 7, located above the water inlet pipe 6, for drawing off the air and odour in the toilet bowl 15. As shown in Figure 3, the upper portion 7' of the aspirator pipe 7 is integral with the toilet basin 1 in the form of a curved protrusion from the plane of the rim 1' of the toilet bowl 1 5. The upper end 8 of the aspirator pipe 7 is formed so that the air and excess moisture are efficiently drawn off. The lower end 8' of the aspirator pipe 7 is connected by a coupling pipe 10 to an inlet 9 of the aspirator 4. An exhaust pipe 11 connects the chamber 3 and the exhaust outlet 2.The end 1 1 t of the exhaust pipe 11 is linked to the outlet 9' of the aspirator 4 by the coupling pipe 10'.

A check valve 12 is located in the outlet 9' in order to prevent counterdirectional flow of-the exhaust gas from the outlet 2.

Number 13 indicates the enclosed cover of the chamber 3 and number 14 indicates the toilet seat.

The operating system of this invention will be described. One method for driving the motor 5 involves the use of a spring-connector. When a person sits on the seat, the motor 5 is connected to the electricity source (not shown). Another method for driving the motor 5 is to install a conventiona on-off switch on the wall. When the switch is at the "on" position, the aspirator 4 is driven by the motor 5.

When the aspirator 4 is operating, air is drawn into the toilet bowl 1 5 through the space between the rim 1' of the toilet basin 1 and the toilet seat 14 and is introduced into the aspirator pipe 7 along with the odour and any excess moisture emitted from the excrement, and finally is exhausted by the aspirator 4 through an exhaust pipe 11 leading to the outlet 2.

The check valve 12 mounted at the outlet 9' of the aspirator 4 prevents the counterflow of air and odour which are exhausted through the exhaust pipe 1 The upper portion of the wastepipe 2 is filled with water, which serves as a buffer between the air in the toilet bowl 1 5 and the exhausted air and smell. Thus there is no need for concern that the exhausted smells will be released back into the air in the toilet bowl.

According to the preferred embodiment of this invention, it has been demonstrated that the best exhaust effects are achieved under following conditions: The aspirator pipe 7 and exhaust pipe 11 are 3.5 cm in diameter, the electric motor 5 is driven at about 2,000 rpm. The fan of the aspirator 4 is made of PVC and its diameter is about 9 cm.

The foregoing specifications are based on the shape and size of a conventional toilet basin, but the specifications may be changed, depending on the shape and size of the fitting.

It should be noted that modifications and variations of the structure of this invention are possible within the scope of the appended claims.

1. An exhaust device for a toilet fitting, comprising a chamber located at the rear part of the toilet fitting; a motor driven aspirator mounted in the chamber; an aspirator pipe integral with the toilet fitting having an inlet positioned above the surface of the water in the toilet bowl and a lower end connected to the aspirator; and an exhaust pipe located between the chamber and the wastepipe from the toilet fitting.

2. An exhaust device as claimed in Claim 1, wherein operation of the motor driven aspirator is

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Exhaust device for toilet fitting The present invention is designed to improve toilet fittings, and comprises an exhaust device for removing the smell and excess moisture from the toilet bowl. The smell emitted from excrement diffuses into the atmosphere inside the toilet and into its environment, resulting in undesirable and unsanitary conditions. Generally, excess moisture from excrement causes discomfort and unsanitary conditions for the user. Accordingly, the object of the present invention is to improve a toilet fitting by providing an exhaust device for removing the smell in the toilet bowl by means of an aspirator which is mounted in a chamber at the rear of the fitting. The present invention comprises an exhaust system for removing the smell in the toilet bowl and comprises a motor driven aspirator that is located in a small chamber. A person's weight on the seat activates the motor, which drives the aspirator, to remove the undesirable smells of excrement, through an aspirator pipe and an exhaust pipe leading to the outlet. The object of the invention is accomplished by an exhaust device, comprising a motor driven aspirator in the chamber. The exhaust device of the invention does not result in a toilet fitting larger than conventional fittings. It is possible for a small chamber to accommodate the motor driven aspirator. This feature and other advantages of the present invention will be better understood through consideration of the specification that follow, in conjunction with the attached drawings, in which: Figure 1 is a perspective view showing a toilet fitted with an embodiment of the present invention; Figure 2 is a longitudinal side section view of the above; and Figure 3 is a longitudinal cross-sectional view of the above. The structural features of the present invention as shown in Figures 1-3, will be described. A chamber 3 is located behind the wastepipe 2 of the toilet fitting 1. The chamber 3 is equipped with an aspirator 4 driven by a motor 5. The basin 1 is additionally equipped with an aspirator pipe 7, located above the water inlet pipe 6, for drawing off the air and odour in the toilet bowl 15. As shown in Figure 3, the upper portion 7' of the aspirator pipe 7 is integral with the toilet basin 1 in the form of a curved protrusion from the plane of the rim 1' of the toilet bowl 1 5. The upper end 8 of the aspirator pipe 7 is formed so that the air and excess moisture are efficiently drawn off. The lower end 8' of the aspirator pipe 7 is connected by a coupling pipe 10 to an inlet 9 of the aspirator 4. An exhaust pipe 11 connects the chamber 3 and the exhaust outlet 2.The end 1 1 t of the exhaust pipe 11 is linked to the outlet 9' of the aspirator 4 by the coupling pipe 10'. A check valve 12 is located in the outlet 9' in order to prevent counterdirectional flow of-the exhaust gas from the outlet 2. Number 13 indicates the enclosed cover of the chamber 3 and number 14 indicates the toilet seat. The operating system of this invention will be described. One method for driving the motor 5 involves the use of a spring-connector. When a person sits on the seat, the motor 5 is connected to the electricity source (not shown). Another method for driving the motor 5 is to install a conventiona on-off switch on the wall. When the switch is at the "on" position, the aspirator 4 is driven by the motor 5. When the aspirator 4 is operating, air is drawn into the toilet bowl 1 5 through the space between the rim 1' of the toilet basin 1 and the toilet seat 14 and is introduced into the aspirator pipe 7 along with the odour and any excess moisture emitted from the excrement, and finally is exhausted by the aspirator 4 through an exhaust pipe 11 leading to the outlet 2. The check valve 12 mounted at the outlet 9' of the aspirator 4 prevents the counterflow of air and odour which are exhausted through the exhaust pipe 1 The upper portion of the wastepipe 2 is filled with water, which serves as a buffer between the air in the toilet bowl 1 5 and the exhausted air and smell. Thus there is no need for concern that the exhausted smells will be released back into the air in the toilet bowl. According to the preferred embodiment of this invention, it has been demonstrated that the best exhaust effects are achieved under following conditions: The aspirator pipe 7 and exhaust pipe 11 are 3.5 cm in diameter, the electric motor 5 is driven at about 2,000 rpm. The fan of the aspirator 4 is made of PVC and its diameter is about 9 cm. The foregoing specifications are based on the shape and size of a conventional toilet basin, but the specifications may be changed, depending on the shape and size of the fitting. It should be noted that modifications and variations of the structure of this invention are possible within the scope of the appended claims. CLAIMS

1. An exhaust device for a toilet fitting, comprising a chamber located at the rear part of the toilet fitting; a motor driven aspirator mounted in the chamber; an aspirator pipe integral with the toilet fitting having an inlet positioned above the surface of the water in the toilet bowl and a lower end connected to the aspirator; and an exhaust pipe located between the chamber and the wastepipe from the toilet fitting.

2. An exhaust device as claimed in Claim 1, wherein operation of the motor driven aspirator is controlled by switch means located in the toilet seat.

3. An exhaust device for a toilet fitting substantially as hereinbefore described with reference to Figures 1 to 3 of the accompanying drawings.