JP2001164633A - Flush toilet bowl, designing method of flush toilet bowl and cleaning method of flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new technique for economizing wash water for cleaning a toilet bowl. SOLUTION: The volume VW of a part for functioning as an air gap among a staying part 41a partitioned and formed by a wash water supply passage 41 is decided as follows, (S1/S2)(2/g)0.5 h00.5-(h0-VW/S1)0.5}<0.25, in the relationship between a water level of wash water stored in a wash water tank 310 at uncleaned time, that is, an initial tank effective water level h0 up to a wash water storage water level in the tank at uncleaned time from the lower end of a drain pipe 346, the tank inside passage cross-sectional area S1, the passage area S2 of the drain pipe and gravitational acceleration (g). After reducing a wash water storage quantity of the wash water tank 310 to about 3.0 to 6.2 liters by being set in this way, the staying part 41a is substituted with discharge wash water in its early stages to effectively use potential energy of the discharge wash water from this wash water tank for cleaning a toilet bowl.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet for flushing fresh flush water through a bowl portion of a toilet bowl, and a method of designing the flush toilet and a method of flushing the flush toilet.

[0002]

2. Description of the Related Art In recent years, there has been a growing demand for saving water for washing water used for washing with flush toilets. To meet this demand for water saving, the amount of washing water may be reduced. However, simply reducing the amount of washing water flowing into the bowl of the toilet bowl not only results in insufficient cleaning of the ball section, but also lacks certainty in transporting and discharging dirt out of the toilet bowl together with the washing water. Become. For this reason, it is the present situation that the trap shape of the toilet bowl body is devised to meet the demand for water saving.

[0003]

By the way, toilet flushing is a phenomenon that is completed within a short time of only a few seconds from the start of flushing. In the process of flushing flush water, the flow aspect of flushing water in the trap is as follows. The open channel flow divided into a gas phase and an aqueous phase has a complicated appearance. Therefore, the trap is formed of resin to enhance the reproducibility of the washing phenomenon, and the shape of the trap is selected in order to save water by selecting variously the bending state of the path, the cross-sectional area of the pipe, and the like in the resin trap. Further improvements have been made. However, saving water through the ingenuity and improvement of such traps requires repetition of experiments and visualization of the flow of washing water that occurs in the traps, which is complicated and requires a lot of labor. Was.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a new method of saving flush water for toilet flushing.

[0005]

[Means for solving the problems and their functions and effects]
In order to solve the problems described above, the flush toilet of the present invention
Let the new flush water flow through the bowl part, and
A flush toilet for washing the washing water, wherein the
And the bottom of the tank is emptied for flushing water.
A drain valve to open the drain port for cleaning
Flush water that is provided on the toilet body that forms
Discharging means for discharging water into the bowl bowl portion, and the discharging means
The space interposed between the step and the lower end of the drain port of the tank is defined.
A space section for forming an image, wherein the drain port
Receiving the inflow of cleaning water discharged from
Water is allowed to flow to the discharge means, and the space is not cleaned
An air gap and the space partitioning section;
The compartment is designed for flow when the tank is assumed to be a washing water flow path.
The road cross section is S ₁, The effective cross-sectional area of the outlet is S_Two, Gravity
Speed g, from the lower end of the drain port when not washing
Set the initial tank effective water level up to the flush water storage level in the tank.
h₀, The volume of the partitioned space is V_WAnd when
Volume V that satisfies the formula_WCharacterized in that said space is formed
And (S₁/ S_Two) (2 / g)^0.5｛H₀ ^0.5-(H₀-V_W/
S₁)^0.5｝ <0.25

According to the flush toilet of the present invention having the above structure, the problem can be solved as follows.

In order to achieve both water saving and high cleaning power, it is necessary to reduce the amount of cleaning water and to effectively use the energy of the cleaning water. For the effective use of this energy, it is essential to improve the transmission efficiency of the energy of the cleaning water. In order to increase the transmission efficiency of the washing water energy in the flush toilet, it is necessary to reduce the pressure loss in the washing water passage. Since this pressure loss is caused by friction between the washing water and the wall of the water passage and the secondary flow at the bent part,
As a design method, it is necessary to reduce the flow velocity in the water channel as much as possible. The flow rate can be easily reduced by reducing the flow rate per unit time or increasing the cross-sectional area of the pipeline. However, it is necessary to maintain the detergency at the same time as saving water, so it is necessary to increase the flow rate per unit time. Under these circumstances, it was necessary to further increase the cross-sectional area of the pipeline in order to reduce the flow velocity.

On the other hand, it is necessary to secure a constant air gap from the sanitary point of view when the water passage in the toilet body is not flushed, and when the cross-sectional area of the water passage is increased, the volume of the water passage increases, so that the air gap volume also increases. I do. In general, when an air mass exists in a pipeline, the open channel flow separates into an aqueous phase and a gas phase, and in such a situation where the open channel flow occurs, the interface between the aqueous phase and the gas phase is formed. Since it exists continuously in the flow direction, the static pressure is substantially constant in the flow direction, and it is difficult to transmit the pressure. Further, a transient pressure change is easily absorbed by the compression and expansion of the air mass forming the gas phase. As described above, the water phase is always equal to the gas phase pressure, that is, is open to the atmosphere, so that the pressure can be transmitted only by dynamic pressure, that is, kinetic energy. In addition, if the water phase and the gas phase coexist, not only the flow velocity reduction effect cannot be obtained even if the cross-sectional area of the pipe is increased, but also the mixing loss of the water phase and the gas phase occurs due to the presence of the free surface, which results in a very large loss. Becomes large.

This kinetic energy is obtained by washing water supplied for flushing the toilet bowl, that is, washing water from the washing water storage tank, and the discharge characteristic accompanying the discharge of washing water from this tank is shown in FIG. Become like

As shown in FIG. 1, when about 0.25 seconds have elapsed since the start of the discharge of the washing water from the tank, the tank head, which is the washing water level in the tank, drops, so The tank discharge energy is reduced by about 15%. The energy lost due to the discharge of the washing water from the tank during this time reaches 30% of the total energy when the tank is full. In addition, the amount of flush water discharged from the tank at this time is as much as 25% of the effective tank water stored in the toilet. The washing water discharged from the tank without replacing the air gap of the water passage with the washing water has lost most of the energy due to the air mass described above because the internal water passage is open and the washing is not possible. Does not contribute much.

Generally, after washing, about 1 L of washing water is required to secure the sealing of the trap. Therefore, the effective storage water amount of the tank is obtained by subtracting this amount. Furthermore, taking into account the dimensional tolerance, variability during construction, and the design margin that are likely to occur when the toilet bowl is made of pottery, as a safety factor, the amount of water in the tank is reduced by approximately 1.5 to 2 L to effectively store the tank. It is necessary to make the amount of water. For example, when the flush water amount of the water-saving toilet is set to 6 L in total, the tank effective stored water amount needs to be about 4 L to 4.5 L.

By the way, the washing water discharged from the tank accelerates and moves the washing water inside the toilet bowl portion and the trap which are stationary at the start of washing, and also has a function of replacing the gap inside the trap with the washing water. . Therefore, about 1 L of cleaning water is required as the discharge cleaning water. Assuming that about 25% of the tank effective storage water amount, that is, about 1 L, is lost to replace the air gap with cleaning water, a total of 2 L of cleaning water is required only for starting cleaning. Since this reaches approximately 50% of the effective storage water volume of the tank that supplies energy for cleaning, the behavior at the start of cleaning is very important to save water while maintaining high cleaning performance. Is shown.

In order to conserve water and maintain a high washing performance as described above, it is necessary not to generate an open channel flow that loses most of the energy (kinetic energy) supplied by the washing water discharged from the tank, and to use a small amount of water. When the washing water is discharged, the washing water remaining as seal water in the toilet bowl and the trap needs to be activated from a stationary state to a flowing state.

Based on these findings, in the flush toilet of the present invention having the above-described structure, the volume V _W of the space that becomes an air gap in the space partitioning section, that is, the space that is replaced with the flush water discharged from the tank, is determined. As described above, a specific value satisfying the following equation was used. (S ₁ / S ₂ ) (2 / g) ^0.5 ｛h ₀ ^0.5- (h ₀ -V _W /
S ₁ ) ^0.5 ｝ <0.25

Here, the meaning of this equation and the effect obtained will be further described.

When the washing water is discharged from the tank, specifically, assuming that the washing water speed in the tank is V ₁ and the washing water speed from the outlet is V ₂ , the amount Q of the washing water discharged is determined by the law of conservation of mass. From the following equation.

Q = V ₁ S ₁ = V ₂ S ₂

On the other hand, the relationship expressed by the following series of equations is established between the discharge of the wash water in the tank and the discharge of the wash water from the outlet from the law of conservation of energy. Here, ρ is the density of the washing water.

[0019] _{Δ {∫ [(ρgS 1 Δh} ) h]} / Δt = {P 1 V 1 S 1 + (ρ / 2) S 1 V 1 3} - {P 2 V 2 S 2 + (ρ / 2 ^{_{) S 2 V 2 3} ...}} ρgS 1 h (dh / dt) = (P 1 -P 2) Q + (ρ / 2) Q {1- (S 1 / S 2) 2} V 1 2 ... -ρgh = _{(P 1 -P 2) + (} ρ / 2) {1- (S 1 / S 2) 2} V 1 2 ... V 1 = {2 [(P 1 -P 2) / ρ + gh] / [(S 1 ^{_{/ S 2) 2 -1]}}} 0.5 ...

Here, in the cleaning method using energy solely by gravity, since the pressure condition is open to the atmosphere, it is possible to set P ₁ = P ₂ (= atmospheric pressure). Also, in order to design without using a large operating force when opening the drain valve against the tank head pressure, the opening area of the drain valve should be sufficiently small with respect to the tank flow path cross-sectional area. Since it is necessary, S ₁ >> S ₂ can be satisfied. Then, the above equation can be simplified as follows.

V ₁ = (S ₂ / S ₁ ) ( ₂ gh) ^0.5 ...-(Dh / dt) = (S ₂ / S ₁ ) ( ₂ gh) ^0.5 ... Dh / h ^0.5 = −dt (S ₂ / S ₁₎ ) (2g) ^0.5 …

When the equation is integrated up to t = t with the initial water level at t = ₀ as h ₀ , (h ₀ ^0.5 −h ^0.5 ) / 2 = t (S ₂ / S ₁ ) (2g) ^0.5 The flow rate W discharged during this time becomes W = ∫ (S ₁ dh) through integration. Here, when the tank flow path cross-sectional area S ₁ is substantially constant regardless of the position is represented by the following equation.

W = S ₁ (h ₀ −h)

The discharge flow rate per unit time from the tank is generally very large, and when the space of the space section exists as an air gap and the tank head has not yet been applied to the internal water passage, the internal flow rate is low. Since the flow rate discharged from the water channel is very small compared to the flow rate discharged from the tank per unit time, the effect can be neglected. Therefore, the tank head h _W when the discharge flow rate from the tank matches the air gap volume and the time t at that time
_W is as follows.

H _W = h ₀ −V _W / S ₁ t _W = (S ₁ / S ₂ ) (2 / g) ^0.5 {h ₀ ^0.5 − (h ₀ −V _W / S ₁ ) ^0.5 }

When this time t _W and the ratio of the energy of the wash water discharged from the tank to the energy of the wash water discharged from the toilet body are examined, the time t _W is controlled because the relation is as shown in FIG. This makes it possible to control the timing of jetting the wash water to the toilet bowl and the application status of the tank head, and to effectively use the potential energy of the stored water inside the tank. Therefore, by identifying the spatial volume V _W as described above, it is possible to replace the air gap of the inner water passage in an early stage in the wash water, thereby made available tank head from the cleaning start. For this reason, since the start of the washing water from the stationary state to the flowing state occurs quickly, the washing can be surely performed with a small amount of the washing water.
Moreover, since the flow of the open channel is hardly caused, the pressure loss is low, and the pressure loss with the pipe wall surface is also small, so that water can be efficiently saved and the cleaning power is extremely high. In other words, both water saving and improvement in cleaning ability can be achieved. Furthermore, since there is no need to particularly consider the trap shape, simplification of toilet production and reduction of labor can be achieved.

The flush toilet of the present invention having the above-described structure is
The following modes can be adopted. That is, it is possible to have a flow rate control means for controlling a flow rate of the wash water discharged from the discharge means to the bowl bowl portion, and to provide the flow control means in a wash water passage route to the discharge opening of the discharge means. It can be an expansion part for expanding the path area. This has the following advantages.

In general, since the discharge opening of the discharge means is directly involved in flushing the toilet bowl by flushing the flush water, if the cross-sectional area of the discharge opening is changed for the purpose of controlling the flow rate, the flow rate changes and the cleaning range and the form of the flush water are changed. Are different at the same time, so a new design must be changed. However, by controlling the flow rate by the flow rate control means on the upstream side of the discharge opening, the amount of washing water can be easily controlled. In this case, it is not necessary to change the shape and area of the discharge opening. Therefore, the washing range and the form of the washing water do not differ, the amount of washing water can be easily controlled without a new design change, and an optimal design can be performed according to the purpose and application. In particular, if the flow control means is an extension of the path area,
Since the flow rate can be controlled without increasing the space volume of the space section, the air in this space can be quickly replaced with the washing water, and the tank head can be used effectively. In addition, since there is no need to provide a special mechanism for controlling the flow rate, the flow rate can be controlled accurately with a simple configuration, and it is easy to perform integral molding using pottery or synthetic resin, and the reliability and productivity are excellent.

Further, the discharging means is a first discharging means for discharging washing water from the upper edge of the bowl bowl to the bowl bowl, and a second discharging means for discharging washing water to the bowl bowl. In the non-washing time, the flush water is present up to the same water level as the flush water level at which the toilet bowl is sealed,
At the time of washing, the toilet bowl may have one of the second water discharging means for discharging new washing water to the toilet bowl portion which has been washed. The first discharging means includes a lead-out section for leading washing water from the flow control means, and a washing-water jet port for jetting washing water guided by the leading-out section to the ball portion. The outlet and the outlet are 0.3 <S _H / S _A <1 when the total opening area of the washing water outlet is S _A and the opening area of the washing water outlet of the outlet is S _H. .2. In this way, it is possible to control the flow rate substantially linearly in accordance with the area ratio of the total open area S _A and the water passage opening area S _H, very effective since the flow ratio that varies depending on the area ratio is large It is possible to control the flow rate. Also, the flow rate can be easily set at the time of design and inspection without any particular trial and error.

Further, if the flow control means can be removed, even if a change in the specifications of the toilet or a variation in the production occurs, it is possible to easily cope with the change by replacing the flow control means. The adjustment can be performed without performing the process, and the product yield can be improved. In addition, since the flow rate control means can be formed separately from the toilet body, high accuracy can be ensured and mass productivity is excellent.

Further, the discharging means is a first discharging means for discharging washing water from the upper edge of the bowl bowl to the toilet bowl, and a second discharging means for discharging washing water to the bowl bowl. In the non-washing time, the flush water is present up to the same water level as the flush water level at which the toilet bowl is sealed,
The second water discharging means for discharging new washing water to the toilet bowl portion which has been sealed with washing water at the time of washing, the first and second water discharging means;
Washing water distributing means for distributing the washing water from the tank to the discharging means. The washing water distributing means may include a distribution rate control means for controlling a distribution rate of the washing water to the first and second discharging means.

With this arrangement, the washing water can be passed through each of the first and second discharging means in accordance with the purpose, application and design so that the energy of the washing water can be effectively transmitted with little energy loss. The discharging means can maintain excellent cleaning performance and further save water. In addition, depending on the distribution ratio control means, it is possible to obtain an optimum flow rate ratio according to the purpose and use of each discharge means. In addition, by changing the distribution ratio control means even at the time of design or inspection, the cleaning performance can be easily adjusted without changing other parts.

In this case, by providing the washing water distributing means in the space section, air can be evacuated by the washing water distributing means, so that the air can be quickly discharged without providing a mechanism only for air bleeding. can do. Therefore, it is possible to easily replace the air in the space of the space partition portion with the washing water with a simple configuration. If the space can be quickly replaced with washing water, the tank head can be effectively used for jetting the washing water, and both high washing performance and water saving can be reliably achieved. Further, if the washing water distributing means is provided in the vicinity of the top in the space of the space section, a minute air pool can be discharged, which is preferable.

[0034] The first discharging means may include a rim spout for discharging flush water along the inner wall of the bowl bowl portion, and a rim for passing flush water from the flush water distributing means to the rim spout. A water jet channel, wherein the second discharge means is provided with a jet spout for jetting washing water to seal the toilet bowl portion, and the washing water is supplied from the washing water distribution means to the jet spout. And a jet water channel. By doing so, the washing head is jetted from the jet outlet, so that the tank head can be effectively used for jet jetting regardless of whether the jet head is used as a jet pump or as a swirling means. Even though the flow rate is large, larger ejection energy can be secured. In addition, if the amount of washing water ejected is small, the duration of ejection from the jet can be continued, so that high washing performance can be maintained even at the end of washing, and through this, the specific gravity that tends to remain at the end of washing Light filth can be reliably washed. In addition, since the flush water can be jetted directly into the stored water by the jet, the flow of the flush water in the toilet bowl portion can be given a direction. Therefore, at the time of flushing the flush water, the flush water level of the bowl portion of the toilet bowl can be prevented from inadvertently rising.
The washing water in the bowl does not overflow and is sanitary.

In this case, the jet passage has a bent portion for changing the flow direction of the washing water, and the bent portion is provided with a velocity distribution reducing means for reducing the velocity distribution of the washing water in the jet passage. Can be included. This has the following advantages.

When the jet ejection energy is increased,
It is desirable to minimize energy loss. On the other hand, if the tank head can be used effectively, the jet ejection flow rate can be increased according to the application. However, in the jet water channel, even when the jet flow rate is increased, the cross-sectional area of the water channel is increased, the speed is reduced, and the occurrence of pressure loss is reduced due to the interaction with the bowl portion of the toilet bowl, the dew-proof layer, or the anti-freezing means. It can be difficult to prevent. In particular, at a bent portion of the jet passage or on the downstream side thereof, a high-speed water flow cannot follow a change in the flow direction, and energy loss accompanying separation is likely to occur. This becomes a more remarkable problem due to an increase in the jet flow rate. Even if the tank head can be used effectively, the use efficiency may decrease due to energy loss at the bent portion. For this reason, if the bent portion has the speed distribution reducing means, for example, if the speed distribution reducing means is provided inside the bent portion or on the downstream side thereof, energy loss generated in the bent portion can be prevented, and the tank can be prevented. Most of the head can be used without loss. In addition, it is possible to reduce the flow path cross-sectional area of the jet water passage, which is difficult to arrange due to the interference with the bent portion and other components, which is favorable in design.

In this case, it is assumed that the rim spout spouts flush water from near the top of the bowl bowl portion so as to clean the inner wall surface of the bowl bowl portion, and the flush water distributing means is provided in the rim water passage. It can also be provided. In this case, the washing water jetted from the jet jet port can be used as a driving fluid in the jet pump, or can be used for swirling the stored water (sealing water) in the bowl portion of the toilet bowl. When jet cleaning water is used as described above, a large kinetic energy is required, and cleaning performance and water saving efficiency are greatly different depending on the magnitude of the kinetic energy. On the other hand, the function of the rim jet cleaning water jetted from the rim jet port is to wash the entire inner surface of the rim or to turn the accumulated water in the ball portion. In the former case of the rim jet cleaning water, large kinetic energy is not required. In the latter case, a constant energy is required. However, if the energy is too large, droplets may be scattered due to collision with stored water, which is not preferable. Therefore,
By the distribution ratio control means provided in the rim water passage, without dissipating the energy on the jet cleaning water side, and distributing the flow rate so as to suppress the excessive ejection energy on the rim side,
The distribution rate of washing water can be controlled hygienically without sacrificing washing performance and water saving efficiency.

Then, the flow channel cross-sectional area S of the jet water channel is_J
And the cross-sectional area S of the rim water channel_RAnd S _J> S_Rgiven that,
That is, when reducing the space volume, S_jS_rGreater than
Is set so that large kinetic energy is required.
Even without increasing pressure loss on the jet side
Can be reduced. This
Therefore, it is preferable to replace the washing water in the space quickly.

The provision of the flow-prevention means near the inflow-side end face of the drain port at the bottom of the tank has the following advantages. In general, the tank flow path cross-sectional area is increased due to the necessity of storing a considerable amount of washing water in the tank.
In order to adjust the flushing water amount appropriately and adapt to the flushing water inlet provided on the toilet bowl side, the drain outlet channel cross-sectional area is reduced. At the time of washing, such a sudden change in the cross-sectional area of the flow path causes a flow contraction at the drain port and causes a pressure loss, but by providing a flow contraction prevention means, unnecessary pressure loss can be prevented. . Therefore, the pressure head of the tank can be effectively used for cleaning, and the effective head from the tank can be increased by the flow preventing means, which is more effective.

In this case, if the tank is provided with a turning preventing means for preventing the washing water from turning inside, there are the following advantages. Slight turbulence or swirling in the tank triggers a sudden reduction in the cross-sectional area of the flow passage near the tank drain, causing the cleaning water discharged from the drain to swirl carelessly and greatly, consuming energy. May be invited. However, since such turning can be prevented, such energy loss can be prevented, and the tank head can be used effectively. In particular, it is preferable to provide a turning prevention means near the drain port where the turning speed is the highest, since a higher turning suppressing effect can be obtained.

Further, the space partition may be configured so that a part or all of the washing water passage portion can be removed. This has the following advantages. In order to quickly replace the space described above with cleaning water and effectively reduce pressure loss, structurally high accuracy is required. However, it is difficult to improve the accuracy of each part if it is integrally formed by pottery or the like, but if the space partitioning part is formed by separate parts, it is possible to increase the accuracy only at necessary places and manufacture is easy. By changing only the space partition using the common body, it is possible to control the distribution, flow rate or duration of the washing water, so that design and manufacturing according to the application can be performed easily. . Further, it is desirable that the variation of the product discovered at the time of the inspection of the product can be easily improved by exchanging a part of the space section and the water-passing portion thereof. In these applications, a flow rate control means, a washing water distribution means or a distribution rate control means is provided in a removable space section, and a plurality of space sections with different settings are prepared in advance, and the use and necessity are determined. They can be exchanged accordingly.

Further, the tank may have a washing water amount setting means capable of setting a plurality of washing water amounts to be discharged from the discharge port. In this way, as described above, the cleaning power can be reliably improved even with a small amount of water, so that even if a plurality of cleaning water volumes can be set, a high cleaning power can be maintained regardless of the flow rate. For this reason, it is possible to surely use only a small amount of water for small use, cleaning or cleaning other items, and it is possible to select a high water saving ability and an optimum cleaning depending on the application.

Further, another flush toilet of the present invention is a flush toilet for flushing the toilet bowl portion by passing fresh flush water through the toilet bowl portion, and a tank for storing the flush water; A drain valve that opens at the bottom of the tank for flush water discharge for flush water release, and a discharge valve that is provided on the toilet body that forms the toilet bowl portion and discharges the flush water that flows into the toilet bowl portion. Means, and a space partitioning section for forming a space interposed between the discharging means and the lower end of the drain port of the tank, wherein the washing receives the inflow of the cleaning water discharged from the drain port into the space during cleaning. When the cleaning water is discharged from the tank, the cleaning water is discharged from the tank when the cleaning water is discharged from the tank. According to And having a substitution means for faster.

Further, the flushing method of the present invention is a flushing method for flushing the toilet bowl portion by passing fresh flush water through a toilet bowl portion of a flush toilet, wherein a bottom portion of a tank for storing the flush water is provided. Discharging washing water from a drain port of the
Replacing the space interposed between the lower end of the drain port and the discharging means provided in the toilet body forming the toilet bowl with the discharged cleaning water, and guiding the replacement cleaning water to the discharging means. Discharging the water from the discharging means to the bowl bowl portion, and the replacing step includes a step of speeding the replacement of the space with the discharged cleaning water.

With these flush toilets and their cleaning methods, the same effects as those of the flush toilet of the present invention described above can be obtained through rapid flushing of the space with flush water.

[0046]

Other Embodiments of the Invention The present invention can also adopt the following embodiments. That is, the flush toilet of another aspect is a flush toilet for flushing the toilet bowl portion by passing new flush water through the toilet bowl portion, and a tank for storing the wash water, and a bottom portion of the tank. A drain valve for opening a drain port opened for flush water discharge during flushing, and flushing the flush water discharged from the flush port to the toilet bowl portion which has been flushed with flush water to a predetermined flush level. A siphon phenomenon is induced by the water passage for flushing and the flush water flowing from the water passage, and the discharge of the flush water sealed in the toilet bowl portion to the outside of the toilet together with the flush water from the water passage. A trap, a flow control means for controlling a flow rate of the washing water passed through the water passage to the toilet bowl portion, and guiding the washing water to a portion other than the water passage on the downstream side of the flow control means, and guiding the flush water. Inject flush water into the bowl bowl And a jetting means, said flow control means is characterized in that it is removable.

In this way, even if the specifications of the toilet are changed or variations occur during production, the flow of the washing water from the jetting means to the toilet bowl portion, that is, the cleaning state, is changed by replacing the flow control means. Can be easily maintained. Therefore, the adjustment can be performed without making a new design change, and the product yield can be improved.
In addition, since the flow rate control means can be formed separately from the toilet body, high accuracy can be ensured and mass productivity is excellent.

[0048]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the structure and operation of the present invention described above, embodiments of a flush toilet of the present invention will be described below. FIG. 3 is an explanatory view showing a vertical section of a siphon-jet type toilet bowl 10 according to an embodiment of the present invention, and FIG. 4 is an explanatory view showing an upper surface of the toilet bowl 10. The siphon jet toilet 10 squirts water from a jet outlet 22 to be described later with washing.
It is characterized by causing siphon action early. Hereinafter, each part of the toilet 10 will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, the toilet 10 has a ball portion 20 for receiving waste. The peripheral wall of the ball portion 20 has a water-covered surface 23 that is in contact with the stored water RW even when the toilet 10 is not washed,
When the toilet 10 is not washed, the exposed surface 24 that does not come into contact with the stored water RW.
It is composed of

As shown in FIG. 4, the jet port 22 is
Zet water supply hole 45 which is an inlet of water from which this hole 22 gushes out
Are connected via a jet water supply channel 46 formed to bend the inside of the toilet. As shown in FIG. 3, the jetting hole 22 is provided at a position substantially opposite to the discharge port 25 with the concave portion 26 interposed therebetween, and the energy of the cleaning water is transmitted to the discharge mechanism after the discharge port 25 without waste. You. Therefore, it is possible to cause the siphon action earlier.

Inside the toilet 10, a mechanism for supplying water to the ball portion 20 (hereinafter referred to as a supply mechanism) and a mechanism for discharging dirt in the ball portion 20 toward the drainage riser pipe 90. (Hereinafter, referred to as a discharge mechanism).

First, the supply mechanism will be described. Toilet bowl 1
A flush water supply hole 40, which is a hole for connecting a drain pipe 346 of the flush water tank 310, is provided at the rear of the flush water tank 310. Is provided with a washing water supply passage 41 which is a flow path of washing water from the washing water tank 310. The washing water supply passage 41 defines a stagnation portion 41 a as a space interposed between the jet water supply passage 46 for jetting the washing water to the ball portion and the lower end of the drainage pipe of the washing water tank 310.
The cleaning water discharged from the drain pipe flows into the stagnation portion 41a at the time of cleaning, and the inflow cleaning water flows out to the rim water supply channel 43 through the jet water supply channel 46 and a branch hole 42 described later. Functions as an air gap without cleaning water.

That is, the stored water (wash water) in the tank urged by the free fall is supplied to the wash water supply channel 41 at a stretch. For this reason, the stagnant portion 41 a in which the washing water supply passage 41 is formed obliquely downward is filled with water after the start of washing, and a part of the washing water is supplied from the branch hole 42 to the rim water supply passage 43. The washing water supplied to the rim water supply channel 43 is supplied to a drain hole 44 provided on the back side of the rim portion 21 (see FIG. 4).
Is discharged from. In this case, the retention portion 41a corresponds to the space being in the present invention, the volume V _W according to the present invention, means the volume of the portion functioning as the air gap of the retention portion 41a.

As shown in FIG. 4, on the back side of the rim 21, large holes 44a having a diameter of 7 mm and medium holes 44b, 3 having a diameter of 4 mm are provided.
There are provided water draining holes 44 having five types of shapes, i.e., a small hole 44c having a diameter of mm and long holes 44d and e having a substantially rectangular shape. The drain hole 44 is formed at the time of molding the rim portion 21. Of course, a distributor having a drain hole may be mounted on the back side of the rim portion 21.

In this case, the large hole 44a and the medium hole 44
The total open area S _A of the drain holes 44 of b, the small holes 44c, the long holes 44d and e is obtained from the product of the area and the number of each hole,
The ratio of the values of the effective passage area (washing water outlet portion open area) S _H of the branch hole 42 for guiding the washing water to the respective holes (S _H /
S _A ) is set to be about 1.23. Therefore,
The amount of cleaning water supplied to the rim water supply channel 43 is adjusted by the degree of opening of the branch hole 42. In this case, the flow rate can be controlled substantially linearly according to the area ratio. In addition, since the flow rate ratio that changes in accordance with the area ratio is large, the flow rate can be controlled very effectively by the branch holes 42. Also, the flow rate can be easily set at the time of design and inspection without any particular trial and error.

As shown in FIG. 3, the area including the branch hole 42 is formed as a separate member made of resin or the like as a separate member, and is detachably attached to the toilet in a watertight manner, as surrounded by a chain line. You can also. Furthermore, a yet another member to the opening of the branch hole 42 in the separate part with or fitted and attached to the adjustable effective passage area (washing water outlet portion open area) S _H of the branch hole 42, That is, the degree of flow adjustment by the branch hole 42 can be made variable. In this way, even if there is a change in the specifications of the toilet or a variation during manufacture, it is possible to easily cope with the setting of the flow rate adjustment by replacing the above separate parts, and it is possible to make adjustments without making a new design change. is there. In addition, it is possible to secure the flow rate adjustment accuracy and improve the mass productivity by improving the product yield and by resin molding of a part separate from the toilet body.

Further, a separate part is formed to include not only the above-mentioned branch hole 42 but also the part of the washing water supply passage 41 which defines the stagnation part 41a, and this separate part is detachably attached to the toilet in a watertight manner. You can also do so. In this case, the retaining portion 41a can be easily formed with high accuracy in its shape and internal volume.

Of the above-mentioned drain holes, the long holes 44d, e
Is provided for imparting a swirling component to the cleaning water discharged from the water discharging hole 44. That is, the flush water urged in the front direction of the toilet bowl 10 and supplied to the left and right rim water supply passages 43 is distributed in accordance with the opening diameter of the water draining hole 44 and the urging force of the flush water. It is discharged from 44a-e. At this time, water with a large urging force is discharged from the long hole 44d formed on the rear side of the rim portion 21 on the right rear side near the branch hole 42 toward the exposed surface 24 on the slightly left side in front of the toilet. Is done. Further, a large amount of washing water flowing clockwise through the rim water supply passage 43 is discharged from the long hole 44 e formed at a position slightly to the right of the front of the toilet 10 toward the exposed surface 24 at the left rear of the toilet 10. You. The cleaning water discharged from the long holes 44d and 44e becomes the mainstream, and a clockwise turning force is applied to the cleaning water discharged from the water discharging hole 44. This turning force is transmitted to the water RW in the ball portion 20. As a result, the water in the ball portion 20 turns clockwise.

The above is an example of a method of giving a swirling component to the cleaning water discharged from the water discharging hole 44.
Other techniques may be used. For example, the water discharge hole 44 may be formed while forming an angle in the turning direction, or the flow path of the rim water supply channel 43 may be formed on one side.

The washing water that has reached the retaining portion 41a is
The water enters a jet water supply hole 45, which is a hole provided in a side wall of the stagnation portion 41a. The washing water is supplied to the Z water supply channel 46 in accordance with this approach. The cleaning water supplied to the Z water supply channel 46 is jetted from the Z jet holes 22. When the stagnation portion 41a is replaced with the cleaning water, the cleaning water is guided from the branch hole 42 to the rim water supply passage 43, and the rim drain hole 4 is formed.
Cleaning water is discharged from 4.

[0061] Distribution of the ejection amount from the ejection amount and the jet ejection hole 22 from the water out hole 44, by adjusting the effective passage area (washing water outlet portion open area) S _H of the branch hole 42, optionally Can be set to The distribution of the discharge amount from the drain hole 44 and the discharge amount from the jet outlet 22 in the toilet 10 will be described later.

Next, the discharge mechanism will be described. As shown in FIG. 3, at the end of the discharge port 25 formed at the back of the concave portion 26 serving as a waste pool, as a flow path (trap) for water and dirt, it curves obliquely upward from the discharge port 25. A connection path 31, an ascending path 32 that extends in the bending direction of the connection path 31 and then curves in the horizontal direction, and a descending path 33 that curves in the downward direction from the horizontal direction are formed.

The end of the descending passage 33 is connected to a drainage rise pipe 90 provided on the wall or floor on the building side via a drainage socket 70 made of resin. Note that the distance k from the rear end of the toilet 10 to the center of the drainage riser pipe 90 shown in FIG.
The distance j from the rear end of the washing water tank 310 attached to the toilet 10 to the center of the drainage riser pipe 90 is 190 mm. That is, if the drainage riser pipe 90 is set up at a position 200 mm from the wall of the toilet room, the set of the toilet bowl 10 and the wash water tank 310 is moved between the back of the wash water tank 310 and the wall of the toilet room. It can be installed with a clearance of 10 mm secured. As described above, according to the set of the toilet bowl 10 and the washing water tank 310, the drainage riser pipe 90 can be provided at a position near the wall on the building side. As a result, the distance from the drainage riser pipe 90 to the pipe space is shortened, and smooth conveyance of waste can be ensured. Of course, when the clearance with the wall of the toilet room is not considered, the distance k and the distance j can be set to values of 200 mm or less.

These flow paths are formed integrally with the toilet bowl 10 which is a pottery by shaping the flow path shape into a gypsum mold or a resin mold, but the flow path is formed by a member different from the toilet bowl 10. It is also possible. For example, all or some of these flow paths may be formed of another member such as resin and connected to the outlet 25. In the case of the toilet 10 of the wall drainage specification corresponding to the case where the drainage riser pipe 90 is provided on the wall side of the building, the shape of the end of the descending passage 33 is set so that the drainage direction is directed to the wall. In other words, the end of the descending path 33 may be connected to a bend pipe directed toward the drainage riser pipe 90.

As shown in FIG. 3, the toilet 10 before the washing operation is performed.
, The connection path 31, the ascending path 32, and the ball portion 2
Within 0, the water RW is stored at the height of the normal water level line WL. The stored water RW prevents the backflow of the odor from the drainage mechanism to the ball portion 20 and the entry of the pests. Further, in this embodiment, while the amount of the pool water RW is reduced, the width is 185 m.
A large pool surface having a value of mx 225 mm in depth is secured to prevent the attachment of dirt to the ball portion 20 and the emission of odor from the exposed surface 24.

The pooled water RW includes water collected inside the ball portion 20 up to the discharge port 25 (hereinafter, this water is referred to as ball portion pooled water or sealed water) and the connection path 3 after the discharge port 25.
1 and the water accumulated in the ascending passage 32 (hereinafter, this water is referred to as accumulated water in the flow path), and the water accumulated in the lower portion of the stagnation portion 41a of the toilet bowl 10 and the jet water supply passage 46 (hereinafter, this water is referred to as jet water). Is included. As shown in FIG. 3, the accumulated water in the flow path is collected only at one location from the connection path 31 to the ascending path 32 in the sewage flow path including the connecting path 31, the ascending path 32, and the descending path 33. . The amounts of the pooled water in the flow path, the ball portion stored water, and the Zet stored water will be described later. In addition,
“Sewage” refers to water that is soiled due to the mixing of waste such as stool or urine or paper.

The height of the normal water level line WL is determined by the height of the weir 34 which is the highest position below the inner wall of the rising path 32. Therefore, as shown in FIG.
a, water supply hole 45 and water supply channel 46
Is lower than the weir 34, and when the toilet 10 is at rest, the lower part of the stagnation portion 41a and the
In 6, the pool water is stored at the above-mentioned water level. When the height of the weir 34 is reduced, the water level of the stored water RW is also lowered, and the amounts of the ball portion stored water, the stored water in the flow path, and the set water are also reduced.

A mechanism for discharging sewage and filth by the drainage mechanism configured as described above will be described. When the cleaning water is discharged from the cleaning water tank 310, the discharged cleaning water first flows into the retaining section 41a, and the potential energy of the cleaning water is used as the kinetic energy to store the jet water stored in the jet water supply passage 46 in the ball section 20 of the ball section 20. Pour into water (sealing water). As a result, washing water jetting from the jet outlet 22 toward the above trap is started, and thereafter, while the discharge of the washing water is continued, the discharged washing water itself continues from the jet outlet 22 with the above energy. It is gushing. Since the staying portion 41a is replaced with the discharge cleaning water at the beginning of the progress of the jetting operation, the discharge cleaning water is jetted from the drain hole 44 through the branch hole 42 after the replacement is completed.

Then, due to the jetting of the washing water from the jet outlet 22 described above, the water level of the reservoir RW rises sharply from the normal water level line WL. Further, since the washing water from the jet outlet 22 is jetted toward the connection path 31, the rising water 32
The water level inside will rise more rapidly.

When the water level of the ascending path 32 rises and a bent portion (hereinafter referred to as a bent portion) from the ascending path 32 to the descending path 33 becomes full, the tip in the descending path 33 and the ball portion 20 of the reservoir water side And a pressure difference is generated between them to generate a downward pulling force. By this pulling force, the wastewater located at a position lower than the bent portion is led to the drainage riser pipe 90 at once with the waste. Thus, a siphon effect is induced.

Next, the amount of water used by the toilet 10 in one washing operation, that is, the amount of water discharged to the drainage rising pipe 90 beyond the weir 34 in one washing operation ( Less than,
(Washing water amount) will be described. First, the configuration of a washing water tank 310 serving as a supply source of used water will be described with reference to the drawings. FIG. 5 is a schematic sectional view of the washing water tank 31, and FIG. 6 is an explanatory view for explaining a drain valve 350 at the tank bottom.

As shown, the washing water tank 310 is
It has a drain valve 350 that opens and closes the drain pipe 346 at its open upper end. The drain valve 350 has a lid 351 and a valve body 352 to which the lid 351 is tightly adhered.
52 is configured to be opened and closed independently of each other. That is, at the time of small use, only the lid 351 is separated from the valve body 352 to open the through hole of the valve body, and at the time of stool, the lid 3
The valve body 352 opens the opening of the drain pipe 346 in a state where 51 is kept in close contact with water. That is,
Since the area of the through hole of the valve body 352 and the opening area of the drain pipe 346 are different from each other, the flush water tank 310
The amount of washing water released from the toilet is different between small use and stool.

In this case, the periphery of the upper end of the through hole of the valve body 352 and the periphery of the upper end of the opening of the drain pipe 346 are both chamfered at a predetermined radius. Cross-sectional area S _{1 of} tank and drain pipe 34
Although the flow of the cleaning water in 6 greatly differs from that of the cleaning water, a contraction occurs, but the contraction is prevented by the chamfered upper edge. Therefore, the pressure loss due to the contraction can be prevented at the time of washing, so that the pressure head of the tank can be effectively used for washing, which is effective in increasing the effective head from the washing water tank.

In this embodiment, the level of the washing water stored in the washing water tank 310 during non-washing, ie, from the lower end of the drain pipe 346 shown in FIG. 5 to the level of washing water stored in the tank during non-washing. The initial tank effective water level h ₀ is determined by changing the volume V _W of the stagnation portion 41 a and the cross-sectional area S _{1 of the} tank.
In relation to etc., it was determined as follows. (S ₁ / S ₂ ) (2 / g) ^0.5 ｛h ₀ ^0.5- (h ₀ -V _W /
S ₁ ) ^0.5 ｝ <0.25

In this equation, S ₁ is the washing water tank 3
10 is a flow channel cross-sectional area when assuming a wash water flow channel,
S ₂ is the effective sectional area of the drain pipe 346 itself when the stool is used, and is the effective sectional area of the through hole of the valve body 352 during the small use. G is the gravitational acceleration.

In this case, first of all, in response to the demand for sufficient water saving,
In order to obtain the required amount of washing water in the washing water tank 310,
3.0-6.2 liters, based on which the tank flow
Road cross section S₁And initial tank effective water level h₀To determine the contraction
Effective disconnection of drain pipe 346 and valve body 352 in consideration of raw conditions
Area S_TwoIs determined, and then the volume V of the stagnation portion 41a is determined._WTo
It was determined by the above equation. In this embodiment, the left of the above inequality
The value of the side was set to be 0.05 to 0.23. That one
As an example, the flow path cross-sectional area S₁Is about 35000mm^Two ,initial
Tank effective water level h₀Is about 300mm, effective area S_TwoIs about
1735 mm, volume V of the staying part 41a_WIs about 800mm
^ThreeThen, the value on the left side of the above inequality is 0.2
2.

Each of the above specifications can be determined in the toilet design stage. In the completed toilet, the tank cross-sectional area S ₁ , the initial tank effective water level h ₀ , the drain pipe 346 and the valve body 352 is a of the effective cross-sectional area S ₂ can be easily measured. Further, as for the volume V _W of the stagnation portion 41 a, the completed toilet bowl is shown in FIG.
L, that is, a cut model cut along the horizontal line at the top of the bent portion of the ascending path 32 and the descending path 33 of the trap. Therefore, it is possible to confirm whether or not the above formula is satisfied in the completed toilet by these actually measured values.

Next, in relation to the above mathematical expressions, the state of washing water and filth at the time of toilet flushing will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 7 is an explanatory view schematically showing a main part for explaining an initial state in which flush water is discharged from the flush water tank 310 to start toilet flushing in large flush. As shown in FIG. 7, at the beginning of the cleaning, the cleaning water discharged from the cleaning water tank 310 flows into the retaining section 41a. The discharged cleaning water thus flown uses the potential energy as a kinetic energy to flow the Z water stored in the Z water supply passage 46 into the ball water (sealing) of the ball portion 20. As a result, the jetting of the washing water from the jet outlet 22 toward the trap is started. In this state, the stagnation portion 41a has not been replaced with the washing water, so that the washing water is
The water does not flow into the rim water supply channel 43 through the branch hole 42, and the washing water is not spouted from the water discharge hole 44.

FIG. 8 shows the rising path 3 after the start of the large cleaning.
2 shows a cross section of the toilet 10 when a bent portion between the second and the descending passages 33 becomes full and a siphon action starts to occur.
As shown in FIG. 8, after the start of the large washing, the staying portion 41a is replaced with the washing water due to the continuous discharge of the washing water. In parallel with this replacement, the washing water is continuously ejected from the jetting holes 22. After the replacement is completed, the washing water flows into the rim water supply passage 43 through the branch hole 42.
Cleaning water ejection from 4 starts. Thus, after the phenomenon that the water level of the cleaning water in the ball portion 20 reaches the maximum water level line WL0, the siphon action occurs almost at the same time when the water level falls to the first water level line WL1. Due to the occurrence of the siphon action, the water filled in the rising path 32 and the connecting path 31 is drawn in the direction of the weir 34. The stool D accumulated near the water bottom surface 50 of the discharge port 25 due to the drawing force.
B and the four sheets of paper TP floating in the reservoir RW move in the direction of the ascending path 32 (in the direction of arrow K1) where a drawing force is generated. The inner diameter of the flow path at the start end 31a of the connection path 31 is:
It is 55 mm, and the filth can be sufficiently distributed.

The stool DB and the paper TP move in the direction of the arrow K1 to ascend in the connection path 31 and the ascending path 32, and are smoothly discharged over the weir 34 in accordance with the flow direction of the washing water. If the cross-sectional area of the flow path from the connection path 31 to the ascending path 32 is made substantially uniform, the washing water is not accelerated due to the difference in the flow path area, and the pressure loss of the water is increased as compared with the case where the cleaning water is accelerated. Smaller. Also, as in the case where the thickness of the pipe is gradually reduced, the flow directions of the washing water cross each other in the middle of the pipe, and the washing water does not overlap each other in a complicated manner. Flow is less likely to occur. Therefore, in order to stably induce the siphon action, it is advantageous to equalize the cross-sectional area of the flow channel, but in the present embodiment, it is more effective to determine each of the above specifications according to a mathematical formula.

Stool DB and paper TP over the weir 34
However, FIG. 9 shows a state when the vehicle descends on the descending path 33. As shown in FIG. 9, the stool DB and paper TP slide over the lower inner wall of the descending path 33 having the steep slope after passing the weir 34, and go straight down along with the washing water (arrow K <b> 2).
) And enters the drainage riser pipe 90 via the drainage socket 70.

Since a smaller amount of washing water is released from the washing water tank than in the case of the large washing as described above when the small washing is executed, the water level in the ball portion 20 is set to the level shown in FIG. Third water line W at a position higher than the first water line
It only goes down to L3. Then, since the water level difference between the bent portion of the drainage channel and the third water level line WL3 also becomes small, a siphon action with a small drawing force occurs.

The occurrence of the siphon action causes the ascending road 3
The water filled in 2 and the connection path 31 is drawn with a small force in the direction of the weir 34. Due to this small retraction force, the light waste such as urine mixed in the reservoir RW and the two sheets of paper TP floating in the reservoir RW moves in the direction of the rising path 32 (in the direction of arrow SK1) where the retraction force is generated. Moving.

The urine and paper TP move in the direction of arrow SK1 and rise in the connection path 31 and the ascending path 32. As described above in the description of FIG. 8, the weir moves smoothly to the vicinity of the terminal end 32c in accordance with the flow direction of the washing water.
Get over.

The urine and paper TP that have passed over the weir 34
FIG. 11 shows how the vehicle descends on the descending path 33. FIG.
As shown in FIG. 1, after passing the weir 34, the urine and the paper TP slide down on the lower inner wall of the steeply descending passage 33, and are directly downward with cleaning water (in the direction of arrow SK2). And enters the drainage riser pipe 90 via the drainage socket 70.

[0086] The above embodiment constructed as siphon jet toilet 10, since the respective specifications of the, including the volume V _W dwell portion 41a determined to meet the specific relationship as described above, the toilet flushing In this case, the potential energy of the cleaning water discharged from the cleaning water tank 30 in the tank can be effectively used. Therefore, the stagnation portion 41a can be replaced with cleaning water discharged from the tank at an early stage, so that the tank head can be effectively used from the start of cleaning. Therefore, it is possible to quickly change the washing water of the ball portion from the stationary state to the flowing state from the beginning of the toilet flushing, and it is possible to reliably wash the washing water even with a small amount of washing water. Moreover, since the flow of the open channel is hardly caused, the pressure loss downstream of the trap is low, and the pressure loss with the pipe wall surface is also small, so that water can be efficiently saved and the cleaning power can be increased. In other words, both water saving and improvement in cleaning ability can be achieved. Furthermore, since there is no need to particularly consider the trap shape, simplification of toilet production and reduction of labor can be achieved. A comparison is made between the toilet bowl 10 of this embodiment, which performs flushing with only about 4.0 to 8.0 liters of flush water, and the existing flush toilet that required about 13.0 liters of flush water. As a result, the toilet of the present example was able to exhibit the same or higher detergency as the existing toilet.

Next, a modified example will be described. FIG.
FIG. 9 is an explanatory view showing a modification applied to a flush toilet 110 which is one of the washdown toilets. Here, the wash-down method refers to a washing method in which the waste water discharged into the bowl of the toilet or the waste water contaminated by the waste is pushed out by using the water force of the wash water supplied to the toilet. Hereinafter, regarding the structure of the flush toilet 110 of the modified example,
This will be described with reference to FIGS. In addition, about the structural part common to the siphon jet toilet 10 of the above-mentioned embodiment, the last two digits of a code | symbol are represented using the common number with 1st Example.

FIG. 12 shows a modified flush toilet 11.
FIG. 13 is an explanatory view showing a vertical cross section of FIG.
It is explanatory drawing which shows the upper surface of 10. As shown in FIG.
The flush toilet 110 is a siphon jet toilet 10
Similarly to the above, a ball portion 120 for receiving dirt is provided, and the discharge port 12 formed in the depth of the concave portion 126 of the ball portion 120 is provided.
At the end of 5, a rising path 132 extending obliquely upward from the discharge port 125 and a descending path 133 curving downward from the end of the rising path 132 are provided as flow paths for water and dirt. ing. From the beginning to the end of the ascending road 32,
As in the case of the above embodiment, the flow passages are formed so as to have the same sectional area.

As described above, the drainage channel is formed as a channel bent from top to bottom, so that a weir 134 is formed at the highest position below the inner wall of the ascending channel 132. As shown in FIG.
In the toilet 10 before the washing operation, the height of the weir 134 is set to the height of the normal water level line WLA, and the stored water RWA including the ball part stored water and the water in the flow path is located at a position lower than the normal water level line WLA. It is accumulating.

As shown in FIG. 12, the descending path 133 is curved downward sharply after passing the weir 134, and extends in a substantially vertical direction toward the drainage riser pipe 190. The terminal ends through a drainage socket 170 made of resin, a drainage riser pipe 190 provided on the wall or floor on the building side.
Connected to. The distance p from the rear end of the toilet 110 shown in FIG. 20 to the center of the drainage riser pipe 90 is 180 mm as in the siphon-jet toilet 10 of the first embodiment, and is assembled to the toilet 110. Wash water tank 4
Distance q from the rear end of 10 to the center of drainage riser 90
Is 190 mm.

As shown in FIG. 12, in the flush toilet 110, the siphon jet toilet 1 shown in FIG.
The weir 134 is provided at a height lower than zero. When the weir 134 is provided high, the height of the normal water level line WLA increases, and the amount of the accumulated water RWA increases. In the flushing type, since the wastewater and the wastewater are flushed using the water force of the washwater supplied to the toilet, when the amount of the stored water RWA increases, the power of the washwater colliding with the waste is weakened, and at the same time, the washing water is washed away. This is because it is difficult to determine the direction of movement of the waste after the collision, which may impair the cleaning performance.

As described above, in consideration of the cleaning performance, the weir 134
The height of the toilet is low, while the flush toilet 1
In 10, the shape of the ball portion 120 secures a wide pool surface. As shown in FIG.
The concave side 126 has a gentle downward slope 123 provided with an inclination of an angle θ (about 40 °) with respect to the horizontal. The downward slope 123 makes it easier for the dirt to roll down and collect in the recess 126, so that the dirt can be smoothly fed into the ascending path 132. Further, by making the descending slope 123 a gentle slope, the ball portion 120
The surface of the pool can be taken widely in the depth direction.

The flush toilet 110 is provided with the washing water tank 4.
10 and a washing water supply hole 140. The cleaning water tank 410 has substantially the same configuration as the cleaning water tank 310 described in the above embodiment, and stores approximately the same amount of cleaning water. Further, the cleaning water tank 410 has different amounts of cleaning water for large cleaning and small cleaning.

As shown in FIG. 13, the cleaning water supply hole 140 is provided.
A flush water supply channel 141, a rim communication hole 142, and a rim water supply channel 143 are provided inside the toilet 110 in the direction from the to the ball portion 120. The water supplied to the washing water supply channel 141 is supplied to the washing water supply channel 141 by its water force.
Immediately replaces the space defined by the rim connection hole 142
Flows into the rim water supply channel 143.

As shown in FIG. 13, a partition wall 148 is provided in the rim water supply passage 143 from the rim communication hole 142 to the middle hole 144b. This partition wall 14
8, the washing water from the rim communication hole 142 is distributed to the left and right rim water supply passages 143. In the modified example, the partition wall 1
48 is provided at a position closer to the right side than the center of the toilet. As a result, the rim water supply channel 14 on the left side
3 is supplied with a larger amount of washing water than the right rim water supply passage 143.

The water thus supplied to the rim water supply passage 143 is discharged to the ball portion 120 from a drain hole 144 formed on the back side of the rim portion 121. As shown in FIG.
As the draining hole 144, a large hole 144a having a diameter of 7 mm is located at the front position of the toilet, a middle hole 144b having a diameter of 4 mm is located near the rim communication hole 142 at the rear of the toilet, and a left side facing the toilet 110 adjacent to the opening 144b. A rectangular hole 14 at the position
4d, and a number of small holes 144c having a diameter of 3 mm are provided at other positions.

The manner in which the washing water is discharged from the water discharging hole 144 thus provided to the ball portion 120 will be described. The flush water urged in the forward direction of the toilet bowl 110 and distributed to the left and right rim water supply passages 143 by the partition wall 148 is first discharged from the inner hole 144b to the peripheral wall behind the ball portion 120. Thereafter, the washing water that is distributed more than the right rim water supply passage 143 is discharged from the long hole 144b toward the left side of the pool surface. This ejection direction is shown by a white arrow in FIG. By the water spouted from the long hole 144b, a left-handed swirling flow is given to the pool water RWA, and the dirt in the ball portion 120 is collected in the concave portion 126.

The washing water after passing through the long hole 144b and the washing water supplied to the right rim water supply passage 143 are supplied to the small hole 1
While being discharged little by little from 44c to the peripheral wall of the ball portion 120, they merge near the large hole 144a in front of the rim portion 121. As a result, a large amount of converged cleaning water is discharged from the large hole 144a toward the concave portion 126. This ejection direction is shown by the hatched arrow in FIG. A large amount of converged water discharged from the large hole 144a collides with the dirt collected in the concave portion 126, so that the dirt is discharged.
It is extruded from 25 to the ascending path 132 and is sent to the descending path 33 over the weir 134.

[0099] determined to satisfy the deformation even in the case of washing out the toilet 110, the specific relationship of the above specifications of the washing water supply path 141, including the volume V _W of the space partitioning formed as an air gap above Was. Therefore, also in the flush toilet 110, the potential energy that the flush water discharged from the flush water tank 30 has in the tank when flushing the toilet can be effectively used.
In particular, in the flush toilet 110, the space can be replaced with flush water discharged from the tank earlier, so that the tank head can be effectively used from the start of flushing, and the flush water amount is small. Even if it can be washed. In addition, the same effects as in the above embodiment can be obtained.

Next, another modified example will be described. FIG.
FIG. 4 is an explanatory diagram for explaining this modification. In the above embodiment, the drain pipe 346 and the valve body 352 have a simple hole. However, as shown in FIG. 14, a partition plate 360 may be provided in the hole along the washing water flow. it can. In this way, even when the washing water flows from the washing water tank and the swirling indicated by the arrow in the drawing occurs, the partition plate 360 can suppress the swirling of the washing water. Therefore, energy loss due to the swirling of the washing water can be prevented, and the tank head can be used effectively. It is preferable that the partition plate 360 is provided near the upper edge of the drain port because a higher turning suppression effect can be obtained.

The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the gist of the present invention. Of course.

For example, in the above embodiment, a low tank type tank connected to a toilet bowl was used as a flush water tank. However, a tank other than the low tank type tank, for example, a toilet bowl wall connected to a toilet bowl through a flush pipe, was used. For example, a tank with a corner or a flat plate may be used. In this case, it is also possible to install the washing water tank at a high position to form a high tank.

Further, the present invention relates to a siphon jet type toilet bowl 10.
Although the case where the present invention is applied to the toilet and the siphon toilet and the flush toilet 110 has been described as an example, a combination of the above toilet and other devices and members can be understood as the invention.
For example, a sanitary washing device combined with a functional toilet seat that realizes various functions such as local washing and heating, a toilet kit device combined with a storage cabinet and a hand washing device, a wall material, a floor material, and a ceiling material as a structure in a toilet room A system toilet device or the like combining the above is conceivable.

In particular, in a toilet kit device and a system toilet device, a tank for storing washing water is usually concealed and stored in a storage cabinet or the like. In addition, in a so-called integrated sanitary washing device, in addition to a tank for storing washing water, in a box-shaped exterior tank provided at the rear of the toilet, it is necessary to realize ass washing and deodorizing. The functional parts are stored. Such a device is provided with a compact washing water tank 310,
If 410 is adopted, the installation space of the tank can be reduced. Therefore, in the toilet kit device and the system toilet device, the tank is easily concealed in the storage cabinet, and in the integrated sanitary washing device, a large number of functional components can be efficiently stored in the exterior tank.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining the operation and effect of the present invention.

FIG. 2 is another explanatory diagram for explaining the operation and effect of the present invention.

FIG. 3 is an explanatory view showing a longitudinal section of a siphon-jet type toilet bowl 10 according to an embodiment of the present invention.

FIG. 4 is an explanatory view showing the upper surface of the toilet bowl 10.

FIG. 5 is a schematic sectional view schematically showing a cleaning water tank 31.

FIG. 6 is an explanatory diagram illustrating a drain valve 350 at the bottom of the tank.

FIG. 7 is an explanatory view schematically showing a main part for explaining an initial state in which flush water is discharged from a flush water tank to start toilet flushing in large flush.

FIG. 8 is an explanatory view showing a cross section of the toilet 10 when a bent portion between the ascending path 32 and the descending path 33 becomes full in a large flush and a siphon action starts to occur.

FIG. 9 is an explanatory diagram showing a state when the stool DB and paper TP descend on the descending path 33 over the weir 34;

FIG. 10 is an explanatory view showing a cross section of the toilet bowl 10 when a bent portion between the ascending path 32 and the descending path 33 becomes full and a siphon action starts to occur in the small washing.

FIG. 11 is an explanatory diagram showing a state in which the paper TP descends on the descending path 33 over the weir 34;

FIG. 12 is an explanatory view showing a vertical cross section of the toilet bowl in order to explain a modification in which the present invention is applied to a flush toilet 110.

FIG. 13 is an explanatory view showing the upper surface of the flush toilet 110.

FIG. 14 is an explanatory diagram for explaining another modified example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Siphon jet toilet 20 ... Ball part 21 ... Rim part 22 ... Zet ejection hole 23 ... Water-covered surface 24 ... Exposure surface 25 ... Discharge port 26 ... Depression 31 ... Connection path 32 ... Ascending path 33 ... Descending path 34 ... Weir 40 ... Wash water supply hole 41 ... Wash water supply passage 41a ... Reservation part 42 ... Branch hole 43 ... Rim water supply passage 44 ... Water discharge hole 44a ... Large hole 44b ... Medium hole 44c ... Small hole 44d ... Long hole 44e ... Long hole 45 ... Z water supply hole 46 ... Z water supply channel 70 ... Drain socket 90 ... Drain riser pipe 110 ... Rinse toilet 120 ... Ball part 121 ... Rim part 131 ... Connection path 132 ... Ascending path 133 ... Descending path 134 ... Weir 140 ... Cleaning Water supply hole 141 ... Wash water supply passage 142 ... Rim connection hole 143 ... Rim supply passage 144 ... Water discharge hole 144a ... Large hole 144b ... Medium hole 144c ... Small hole 144d ... Length 148 ... partition wall 170 ... drainage socket 190 ... drainage raising pipe 310 ... washing water tank 346 ... drainpipe 350 ... drain valve 351 ... lid 352 ... valve body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidemine Miyahara 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Touchi Kiki Co., Ltd. (72) Inventor Masaki Kitamura 2 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1-1 Toto Kiki Co., Ltd. (72) Inventor Takayuki Otani 2-1-1 Nakajima, Kokura Kita-ku, Kitakyushu-shi, Fukuoka Prefecture Toko Kiki Co., Ltd. (72) Inventor Hiroshi Shigeto Kokura, Kitakyushu-shi, Fukuoka No. 2-1-1 Nakajima, Kita-ku Toto Toki Kiki Co., Ltd. (72) Inventor Noboru Niihara 2-1-1 Nakajima, Kokura-Kita-ku, Kitakyushu-shi, Fukuoka F-term in Toto Kiki Co., Ltd. 2D039 AA02 AC04 AD02 AD04 CB02

Claims (22)

[Claims] 1. A new flush water is passed through the bowl portion of the toilet bowl.
A flush toilet for cleaning the toilet bowl portion, comprising: a tank for storing the flush water;
A drain valve for opening a mouth during washing, and a toilet valve forming the toilet bowl portion,
Discharging means for discharging the flush water into the bowl bowl
Interposed between the discharge means and the lower end of the drain port of the tank.
This is a space section that forms a space that
Receiving the inflow of the discharged cleaning water from the drain port into the space
The inflow washing water flows out to the discharge means, and when not washed,
The space partitioning section having the space as an air gap.
For example, the space section assumed the tank as a washing water flow path.
When the cross-sectional area of the flow path is S ₁, The effective area of the drain
S_Two, The gravitational acceleration g, when not washing from the lower end of the drain port
Initial tank up to the washing water storage water level in the tank at
H effective water level₀, The volume of the partitioned space is V_WWhen
Then, the volume V that satisfies the following equation_WForm the space of
A flush toilet characterized by the fact that: (S₁/ S_Two) (2 / g)^0.5｛H₀ ^0.5-(H₀-V_W/
S₁)^0.5｝ <0.25 2. The flush toilet according to claim 1, further comprising a flow control means for controlling a flow rate of flush water discharged from the discharge means to the toilet bowl portion. 3. The flush toilet according to claim 2, wherein the flow rate control means is an extension part for expanding a path area in a flush water passage route to a discharge opening of the discharge means. 4. The flush toilet according to claim 1, wherein the discharging means discharges flush water from an upper edge of the bowl portion to the bowl portion. A second discharging means for discharging flush water to the bowl bowl portion, wherein the flush water is present at the same level as the flush water level of the flush water sealed by the flush bowl portion when not flushing, and the flush water during flushing. A flush toilet having one of the second water discharging means for discharging new flush water to the closed toilet bowl portion. 5. The flush toilet according to claim 4, wherein the first discharging means of the discharging means is a lead-out unit for leading washing water from the flow rate control means, and the washing water led by the lead-out unit. A washing water jet port for jetting the washing water jet port to the ball portion, wherein the washing water jet port and the outlet section have a total opening area S _A of the cleaning water jet port, and a washing water outlet portion opening of the outlet section. _A flush toilet formed so that an area is _SH and 0.3 < _SH / SA <1.2. 6. The flush toilet according to claim 2, wherein the flow control means is detachable. 7. The flush toilet according to any one of claims 1 to 6, wherein the discharging means includes: a first discharging means configured to discharge washing water from an upper edge of the bowl portion to the bowl portion. A second discharging means for discharging flush water to the bowl bowl portion, wherein the flush water is present at the same level as the flush water level of the flush water sealed by the flush bowl portion when not flushing, and the flush water during flushing. A flushing device comprising: a second water discharging means for discharging new flushing water to the closed toilet bowl portion; and a flushing water distributing means for distributing flushing water from the tank to the first and second discharging means. Toilet bowl. 8. The flush toilet according to claim 7, wherein the washing water distributing means has a distribution rate control means for controlling a distribution rate of the washing water to the first and second discharging means. . 9. The flush toilet according to claim 7, wherein the flush water distributing means is provided in the space section. 10. The flush toilet according to claim 9, wherein the flush water distributing means is provided near a top of a space defined by the space partition. 11. The flush toilet according to any one of claims 7 to 10, wherein the first discharging means discharges cleaning water along an inner wall of the bowl bowl portion, and the flushing port. A rim water passage for passing washing water from the water distributing means to the rim spout; the second discharging means includes a jet spout for spouting washing water to seal the toilet bowl portion; A flush toilet having a jet water passage through which flush water flows from the flush water distribution means to the jet outlet. 12. The flush toilet according to claim 11, wherein the jet passage has a bent portion for changing a flow direction of the wash water, and the bent portion has a speed of the wash water in the jet passage. A flush toilet having speed distribution relaxation means for mitigating distribution. 13. The flush toilet according to claim 11, wherein the rim ejection port ejects flush water from near a top of the toilet bowl portion so as to wash an inner wall surface of the toilet bowl portion. The flush toilet, wherein the flush water distributing means is provided in the rim water passage. 14. The flush toilet according to claim 11, wherein the cross-sectional area S _{J of the} jet water passage and the cross-sectional area S _{R of the} rim water passage are S _J. > are in a relationship of S _R, flush toilet. 15. The flush toilet according to any one of claims 1 to 14, further comprising a contraction preventing means for preventing contraction near an inflow-side end face of the drain port. . 16. The flush toilet according to claim 1, wherein the tank has a swirl prevention means for preventing the swirling of swirl inside the tank. 17. The flush toilet according to claim 16, wherein the turning prevention means is provided near the drain port. 18. The flush toilet according to claim 1, wherein the space partitioning section is configured such that at least a part of a flush water passage portion is detachable from the toilet body. ,
Flush toilet. 19. The flush toilet according to claim 1, wherein the tank has flush water amount setting means capable of setting a plurality of flush water amounts discharged from the discharge port. 20. A method of designing a flush toilet for flushing the toilet bowl portion by passing fresh flush water through the toilet bowl portion, comprising: a tank for storing the wash water; A drain valve for opening a drain port opened for discharge at the time of cleaning; a discharging means provided on a toilet body forming the toilet bowl portion, for discharging flush water flowing into the toilet bowl portion; And a space defined between the lower end of the drain port of the tank and the lower end of the tank. The washing section receives an inflow of the cleaning water discharged from the drain port into the space during cleaning and discharges the inflow cleaning water into the space. In the flush toilet having the space partitioning part which makes the space an air gap when not flushed, the cross-sectional area of the flow passage when the tank is assumed to be a flush water flow passage is S ₁ , Yes The cross-sectional area S _2, a gravitational acceleration g,
When the initial tank effective water level from the lower end of the drain port to the washing water storage level in the tank at the time of non-washing is h ₀ , and the volume of the partitioned space is V _W , the volume V _W satisfying the following equation A flush toilet design method, wherein the space is defined by the space defining portion. (S ₁ / S ₂ ) (2 / g) ^0.5 ｛h ₀ ^0.5- (h ₀ -V _W /
S ₁ ) ^0.5 ｝ <0.25 21. A flush toilet for flushing the toilet bowl portion by passing fresh flush water through the toilet bowl portion, comprising: a tank for storing the flush water; A drain valve for opening a drain port opened at the time of cleaning; a discharging means provided on a toilet body forming the toilet bowl portion, for discharging flush water flowing into the toilet bowl portion; the discharging means and the tank A space defined between the lower end of the drain port and the lower end of the drain port, and receives the inflow of cleaning water discharged from the drain port into the space during cleaning, and discharges the inflow cleaning water to the discharging means. And a replacement means for speeding up the replacement of the space in the space defined by the released cleaning water when the cleaning water is released from the tank when the cleaning water is released from the tank. Flush toilet bowl, characterized in that it comprises a. 22. A cleaning method for flushing said toilet bowl portion by passing fresh flush water through a toilet bowl portion of a flush toilet, wherein the flush water is supplied from a drain port at the bottom of a tank storing the flush water. Discharging the water, and replacing the space interposed between the lower end of the drain port and the discharging means provided in the toilet body forming the toilet bowl with the discharged cleaning water; and Guiding the liquid to the discharge means, and then discharging the discharged water from the discharge means to the toilet bowl portion. The replacement step includes a step of speeding replacement of the space with the discharged cleaning water. Washing toilet flushing method.