DE3877183T2 - TOILET. - Google Patents

Abstract

The water closet has a drainage port in a position higher than the floor. During a flushing operation, an air vent space is partitioned by a water wall formed by a water flux dropping from a dam and by an increase of the water level in a reservoir. The air in a trap is pushed out speedily toward the drainage port, due to the rapid flow of water to make vacuous the interior of a trap's drainage passage, and make it ready to start a siphoning action. When the feeding of water from a tank has been completed, so that the continuous siphoning action approaches the end, a notch is formed in the water wall. This notch permits the air to enter the air vent space immediately.

Description

The present invention relates to a flush toilet with a drain opening above a floor according to the preamble of patent claim 1. Such a toilet is known from GB-A-507 908.

It should be noted that in GB-A-507 908 the leg 13 gradually increases in cross-section downwards and then subsequently decreases in cross-section by a projection 15 extending into the leg 13. Such a construction may indeed cause a more rapid build-up of the siphon action, as is claimed in this prior art. However, the overall effect is that during the siphon action the flow rate is drastically reduced. This is a major disadvantage and works against effective cleaning of the contents of the bowl of the water closet.

A one-piece toilet with a low silhouette is known (see, for example, Japanese Laid-Open Utility Model Application No. 106584/1986).

In such a water closet, the height of a flush tank is adapted as far as possible to the toilet body, so that a uniform impression is created.

Therefore, a sufficient water column cannot be obtained and an instantaneous flow rate of flush water, which is a major factor in controlling a flushing function of a toilet, is extremely low compared with that of a toilet in which a flush tank is mounted on a toilet body and a toilet in which a flush valve is used as a supply device.

Basically, the core height of a drain opening in a toilet with a wall drain is 100 to 150 mm above a floor surface. However, when a one-piece toilet of a low silhouette of a wall drain type is used to obtain the above-mentioned height of the drain opening, a water column from a water surface of a bowl portion to a core of the drain opening decreases and a satisfactory function cannot be obtained, resulting in the above-mentioned poor condition. Therefore, there has been no one-piece toilet of a wall drain type.

On the other hand, since a one-piece water closet is considered to be a high-end water closet, it has been desirable to install this one-piece water closet in high-end villas, suites in first-class hotels and the like. However, ceiling beams in hotels, villas and the like often obstruct the drain pipes. In the case of high-rise buildings and the like, the ceiling height is often ensured by removing piping space in the ceiling. Therefore, the conventional one-piece water closet which uses a floor drain pipe and requires the drain pipes to be installed below the floor cannot be used to meet the market need described above.

The problem underlying the present invention is to provide a siphon with a new design for a water closet in which the flush tank is formed integrally with a toilet body and in which a drain opening is located above a base, the siphon being such that a powerful siphon force is achieved.

This problem is solved by the features of patent claim 1.

With the above arrangement, according to the aforementioned technical solution of the present invention, during flushing, the vent space is divided like a wall by a water surface falling from the overflow section and a rise in the water level of the sump section, and air within the siphon is immediately forced toward the drain opening by the force of a water flow, so that the pressure in the siphon becomes a negative pressure. As a result, a siphon effect occurs.

Furthermore, when the supply from the tank stops and the siphon effect ends, air is immediately introduced from a recess of the partition and thus the timing of the air supply becomes faster so that the siphon effect is immediately terminated.

An embodiment of the present invention is described below with reference to the figures.

In the figures, reference numeral (A) denotes a toilet body and (B) a flush tank formed integrally with an upper half at the rear thereof, the flush tank (B) being formed such that the height of the flush tank (B) is adapted to the toilet body (A) as much as possible so as to create an impression of unity with the toilet body (A).

In the toilet body (A), a peripheral water channel (9) is provided along the upper edge of a bowl section (1) and is connected via a feed chamber (10) to an intermediate section at the level of the flush tank (B) provided at the rear of the bowl section (1). A discharge opening (11) is located at the bottom of the bowl portion (1) and communicates with the bottom of the washing tank (B) via a water guide channel (12) provided outside the bowl portion (1), so that a part of the washing water within the tank (B) is supplied along the wall surface of the bowl portion (1) from the water injection hole (13) located on the lower surface of the edge water channel (9) and the remaining major part thereof is guided spirally from the discharge opening (11) to the bottom of the bowl portion (1).

Furthermore, the toilet body (A) is provided with a siphon drain (2) for draining the flushing water supplied outside the toilet through the bowl section (1) together with the waste water, which is connected to the bowl section (1).

In the siphon drain (2), an inlet (14) opens to the bottom of the bowl (1) and an outlet, i.e. a drain opening (3) opens to a substantially intermediate portion between the lower end of the flush tank (B) and the lower end of the toilet body (A) at the rear of the toilet body (A), both the inlet and the drain opening (14, 3) communicating with each other and forming a substantially S-shaped arrangement.

This means that the siphon drain (2) consists of a section which extends obliquely upwards from the inlet (14) open to the bottom of the bowl section (1) towards the rear section of the toilet body (A) (hereinafter referred to as section a), a section which adjoins the upper end of section a and which extends substantially vertically downwards and reaches a position which is lower than the height of the position of the inlet (14) and the drain opening (3) (hereinafter referred to as section b), and a section which adjoins the section b and which extends obliquely and upwardly towards the drain opening (3) (hereinafter referred to as section c), the bottom wall at the upper end of the section a forming an overflow section (4).

In the siphon drain (2), a diameter of the section b gradually changes downward to partially narrow the diameter of the drain opening and forms a sump section (5) from the lower end of the section b to the half of the section c.

Furthermore, in the siphon drain (2), a downwardly extending partition wall (7) is formed on the upper wall of the sump (5), more precisely on the upper wall of a boundary section between the sections b and c, so that a small vent space (6) remains between the lower end of the partition wall and a water surface or water level of the sump (5).

The partition wall (7) is provided with a recess (8) having a suitable width from its lower end to the vertical middle section.

The optimal dimension of the venting chamber (6) is approx. 20 mm to induce the siphon effect.

While in the embodiment described above the toilet was described as one with a low silhouette, it should be noted that, for example, a siphon or siphon-jet toilet can also be provided. (Mode of action)

The invention constructed as described above has the following advantages.

(1) A structure is provided in which the venting space is closed off like a wall by water flowing down from the overflow section and causing the water level of the sump section to rise. Therefore, air inside the siphon can be quickly forced by water towards the drain opening to create a negative pressure inside the siphon with respect to the atmosphere, so that the siphon effect occurs quickly.

Consequently, the instantaneous flow rate is significantly lower than that of a tank directly connected to a water closet or a closet that uses a flush valve.

Although this toilet is a one-piece low-silhouette toilet in which a core height of a drain opening is set to about 100 mm above a floor surface like the wall drain type and a water column from the bowl portion to the core of the drain opening is small, a fully satisfactory drainage of sewage can be achieved like the wall drain type.

This means that the toilet according to the invention can be installed without any difficulty in high-rise buildings, luxury villas, luxury hotels and the like, where the ceiling beams hinder an underfloor pipe system and which often have no pipe gaps in the ceilings, which makes it difficult to install a one-piece toilet with a low silhouette. The toilet according to the invention meets the needs of the market.

(2) By providing the recess on the partition wall, air can be immediately introduced into the siphon from the recess when the supply of water from the flush tank stops and the siphon action ends and therefore the siphon action can be quickly terminated to restore a water level in the bowl section and the depth of the sealing water can return to its original state due to the siphon seal.

Moreover, if no recess is provided on a partition wall, the time until the siphon action is terminated increases considerably due to the rise in the water level of the sump section and the water falling from the overflow section makes it difficult to ensure the depth of the sealing water.

It should be noted that the recess described above does not affect the starting time and strength of the siphon effect, since at the start of the siphon effect a water film is formed at the recess by a bundle of water from the overflow section.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a cross-sectional view of a water closet embodying the present invention; Fig. 2 is a partially cutaway plan view; Fig. 3 is a cross-sectional view taken along line III-III of Fig. 1; Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 1; and Fig. 5 is a cross-sectional view taken along line V-V of Fig. 1.

A: Toilet body

B: Rinse tank

1: Bowl section

2: Siphon drain

3: Drain opening

4: Overflow section

5: Swamp section

6: Ventilation room

7: Partition wall

8: Recess

Claims (3)

1. Water closet in which a flush tank (B) is formed in one piece with a toilet body (A), comprising: a siphon drain (2) leading from an inlet (14) in a bowl section (1) to a drain opening (3) in a lateral peripheral surface of the toilet body; and wherein the siphon drain (2) has a sump section (5) downstream of an overflow section (4), characterized in that a siphon drain section (b) between the overflow section (4) and the sump (5) is gradually reduced downwards in its cross-section such that no abrupt projections are present in the drain section (b); and a downwardly extending partition wall (7) protrudes into the sump (5), the partition wall leaving a small ventilation space (6) between the lower end of the partition wall (7) and a water surface of the sump (5). 2. Water closet according to claim 1, characterized in that the partition (7) is provided with a recess (8). 3. Water closet according to claim 1 or 2, characterized in that a water guide channel (12) leads from the flush tank (B) to the inlet (14).