TOILET

Abstract

A toilet, including: a bowl member having a contraction portion, which is narrowed from a top to a bottom thereof. There is a water passing rim provided at the top rim of the contraction portion. A receiving portion is provided below the contraction portion. The receiving portion connects with a discharging pipe. A water tank places at one side of the bowl member. The water tank has an exit. A divided pipe places under the tank and connects with the exit. The divided pipe has a first exit and a second exit. A down tunnel connects with the second exit of the divided pipe in one end and with the receiving portion in the other end. The end of the down tunnel that connects with the receiving portion points to the discharging pipe and forms a jet water delivery port. The down tunnel has a downward section. A water rim duct connects with the first exit of the divided pipe in one end and the water passing rim in the other end. An air ductule, the down end of the air ductule connects with the downward section of the down tunnel and the up end of the air ductule connects with the water passing rim.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to equipment in the bathroom. More particular, to a toilet.

2. Description of the Related Art

In present, a toilet that works with gravity has a wider enter 1 under a water tank and connects with a down tunnel 2 and a water passing rim 3 as disclosed in U.S. Pat. No. 5,918,325 and FIG. 1. The toilet uses the momentum that generates from the gravitational potential energy of water and the siphon effect in the discharging pipe 4 to provide the flush function. But, the gravitational potential energy of water can not perform the best condition in these structures. The reasons are:

1. Under still condition, there is air left inside the down tunnel 2 between the water tank and the water surface 5. When the valve is opened, air will resist water flow. So, the gravitational potential energy of water can not release smoothly. According to the formula of floating power, floating power equals to the gravity of the liquid volume that is excluded and therefore the momentum will lose. This is the reason why the water tank must has water more than 1.28 gallons. Usually, the water tank must have more than 1.6 gallons water to reach the flush standard.

2. There is a wider down tunnel that connects with the water passing rim under the water tank in present product. Therefore, when the valve is opened, water and air in the connection place of the down tunnel and the water passing rim mix together easily and air will be flushed away with water to the jet water delivery port. This phenomenon reduce the kinetic energy of water flow and produces big bubble effection. This structure is also difficult to use in a save water toilet.

3. Most of the toilets now are made from pottery in one unity. The precision is poor and the size of those tunnels is not easy to control. Meanwhile, there are many other limitations like material or model. So, the down tunnel has a chequered size, shape and cross-section. It is also not easy to make the down tunnel into perfect circular shape to match the request of hydrodynamics. The chequered size, shape and cross-section will reduce the water power. For example, in a basic hydrodynamics formula, an equal diameter of a pipe that is not in a circular shape and has 900 mm in cross-section and 120 mm in circumference is

D=4Rh

Rh=900/120=7.5

D=4Rh=4×7.5=30 mm

So, the equal diameter of the pipe that has 900 mm in cross-section is 30 mm. that means the pipe equal to a perfect circular pipe that has 30 mm diameter. But, the transition efficiency of the pipe is

700/900=0.77

That means the pipe has only 77% transition efficiency than a perfect circular pipe. In order to make up the momentum, the water tank needs more water.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a toilet, which can provide a good flushed efficiency and save water.

To achieve object of the present invention, a toilet including: a bowl member having, a contraction portion, which is narrowed from a top to a bottom thereof. There is a water passing rim provided at the top rim of the contraction portion. A receiving portion is provided below the contraction portion. The receiving portion connects with a discharging pipe. A water tank places at one side of the bowl member. The water tank has an exit. A divided pipe places under the tank and connects with the exit. The divided pipe has a first exit and a second exit. A down tunnel connects with the second exit of the divided pipe in one end and with the receiving portion in the other end. The end of the down tunnel that connects with the receiving portion points to the discharging pipe and forms a jet water delivery port. The down tunnel has a downward section. A water rim duct connects with the first exit of the divided pipe in one end and the water passing rim in the other end. An air ductule, the down end of the air ductule connects with the downward section of the down tunnel and the up end of the air ductule connects with the water passing rim.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of prior art.

FIG. 2 is a partial sectional view of the first embodiment of present invention;

FIG. 3 is a sectional view at line 3-3 of FIG. 1.

FIG. 4 is a partial sectional view of the first embodiment of present invention shown the other side;

FIG. 5 is a partial sectional view of the second embodiment of present invention;

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 2 to FIG. 5, a toilet of present invention, including:

A bowl member 10 has a contraction portion 11, which is narrowed from a top to a bottom thereof. There is a water passing rim 12 provided at the top rim of the contraction portion 11. A receiving portion 13 is provided below the contraction portion 11. The receiving portion 13 connects with a discharging pipe 14. The discharging pipe has a flat section 141, an upward section 142, a converted section 143 and a downward section 144.

A water tank 20 places at one side of the bowl member 10. The water tank has a valve (not shown in FIG.) and an exit 21.

The characters of present invention are that:

A divided pipe 30 places under the tank and connects with the exit 21. The divided pipe 30 has a first exit 31 and a second exit 32.

A down tunnel 40 connects with the second exit 32 of the divided pipe 30 in one end and with the receiving portion 13 in the other end. The end of the down tunnel 40 that connects with the receiving portion 13 points to the discharging pipe 14 and forms a jet water delivery port 41. The down tunnel 40 has a downward section 41, a flat section 42 and an aduncous section 43. The down tunnel 40 makes from plastic or makes of metal rather than makes from pottery. So, the inside cross-section can be au uniform and accordant circle to match the hydrodynamics and reduce the loss.

A water rim duct 50 connects with the first exit 31 of the divided pipe in one end and the water passing rim 12 in the other end.

An air ductule 60, the down end of the air ductule 60 connects with the second half of the down tunnel 40. The best connection position is near and over the water surface in the receiving portion 13 about 15˜20 mm. The up end of the air ductule 60 connects with the water rim duct 50. The included angle θ between the axial of the up end and the axial of the water rim duct 50 is better equal to or small than 90 degrees. By the way, the air can flow along with the current direction in the water rim duct 50.

The arrangement and operation method of present invention are the same with the prior art. The gravity makes water in the water tank to flush into the divided pipe 30 when the valve of present invention is opened. The current divides into two parts, one part goes into the water passing rim 12 by passing through the first exit 31 and the water rim duct 50. The other part goes into the down tunnel 40 by passing through the second exit 32. In present invention, the inside cross-section of the down tunnel 40 that makes from plastic or makes of metal is similar to perfect circle. It is different from the pottery of prior art. So, the inside shape and size of the down tunnel 40 can be controlled stably and efficiently to match the hydromanics rules. Water runs more smoothly and the impulse lose can be avoided therefore. The gravity of water releases more smoothly.

Moreover, when water runs into the down tunnel 40, air in the down tunnel 40 will be sucked out from the air ductule 60 by the water pressure and the pump effection of the water rim duct 50. Accordingly, air in the down tunnel 40 will not run up and will not against the impulse of water. The gravity of water can be released smoothly without this resistance. The jet water delivery port 41 no longer has big bubble effection. The flow rate at the jet water delivery port 41 can be faster than prior art and therefore water quantity can be reduced. The quantity of water in a single flush can be reduced under 1 gallon and still match the flush standard.

The connection place of the air ductule 60 of present invention is not limited. As shown in FIG. 5, the air ductule 60 can connect with the down tunnel 40 and the water passing rim 12 directly and also provides the same exhaust effect.

Although the invention has been shown and described with respect to preferred embodiments thereof. It should be understood by those skilled in the art that the foregoing and other changes in the form and detail thereof may be made therein without departing from the spirit and scope of the invention.

Claims

1. A toilet, including:

a bowl member having a contraction portion, which is narrowed from a top to a bottom thereof and there being a water passing rim provided at the top rim of the contraction portion;

a receiving portion being provided below the contraction portion; the receiving portion connecting with a discharging pipe;

a water tank placing at one side of the bowl member and the water tank having an exit;

the characters of present invention being that:

a divided pipe placing under the tank and connecting with the exit, the divided pipe having a first exit and a second exit;

a down tunnel connecting with the second exit of the divided pipe in one end and with the receiving portion in the other end; the end of the down tunnel that connects with the receiving portion pointing to the discharging pipe and formed a jet water delivery port; the down tunnel having a downward section;

a water rim duct connecting with the first exit of the divided pipe in one end and the water passing rim in the other end;

an air ductule, the down end of the air ductule connecting with the downward section of the down tunnel; the up end of the air ductule connecting with the water rim duct.

2. The toilet as claimed in claim 1, wherein the down end of the air ductule connects with the second half of the down tunnel.

3. The toilet as claimed in claim 2, wherein the down end of the air ductule connects with the second half of the down tunnel and the best connection position is near and over the water surface in the receiving portion.

4. The toilet as claimed in claim 3, wherein the down end of the air ductule connects with the second half of the down tunnel and the best connection position is near and over the water surface in the receiving portion about 15˜20 mm.

5. The toilet as claimed in claim 2, wherein the down tunnel has a downward section, a flat section and an aduncous section.

6. The toilet as claimed in claim 1, wherein the included angle between the axial of the up end and the axial of the water rim duct is better equal to or small than 90 degrees.

7. The toilet as claimed in claim 1, wherein the inside cross-section of the down tunnel has circular shape.

8. The toilet as claimed in claim 1, wherein the down tunnel makes from non-pottery material.

9. The toilet as claimed in claim 1, wherein the down tunnel makes from plastic.

10. The toilet as claimed in claim 1, wherein the down tunnel makes of metal.

11. A toilet, including:

a bowl member having a contraction portion, which is narrowed from a top to a bottom thereof and there being a water passing rim provided at the top rim of the contraction portion;

a receiving portion being provided below the contraction portion; the receiving portion connecting with a discharging pipe;

a water tank placing at one side of the bowl member and the water tank having an exit;

the characters of present invention being that:

a divided pipe placing under the tank and connecting with the exit, the divided pipe having a first exit and a second exit;

a down tunnel connecting with the second exit of the divided pipe in one end and with the receiving portion in the other end; the end of the down tunnel that connects with the receiving portion pointing to the discharging pipe and formed a jet water delivery port; the down tunnel having a downward section:

a water rim duct connecting with the first exit of the divided pipe in one end and the water passing rim in the other end;

an air ductule, the down end of the air ductule connecting with the downward section of the down tunnel; the up end of the air ductule connecting with the water passing rim.

12. The toilet as claimed in claim 11, wherein the down end of the air ductule connects with the second half of the down tunnel.

13. The toilet as claimed in claim 12, wherein the down end of the air ductule connects with the second half of the down tunnel and the best connection position is near and over the water surface in the receiving portion.

14. The toilet as claimed in claim 13, wherein the down end of the air ductule connects with the second half of the down tunnel and the best connection position is near and over the water surface in the receiving portion about 15˜20 mm.

15. The toilet as claimed in claim 11, wherein the down tunnel has a downward section, a flat section and an aduncous section.

16. The toilet as claimed in claim 11, wherein the inside cross-section of the down tunnel has circular shape.

17. The toilet as claimed in claim 11, wherein the down tunnel makes from non-pottery material.

18. The toilet as claimed in claim 11, wherein the down tunnel makes from plastic.

19. The toilet as claimed in claim 11, wherein the down tunnel makes of metal.