CN107407084B

CN107407084B - Water-washing type toilet

Info

Publication number: CN107407084B
Application number: CN201580077527.7A
Authority: CN
Inventors: 近藤康宏; 松原光
Original assignee: Lixil Corp
Current assignee: Lishu Group Co ltd; Lixil Corp
Priority date: 2015-03-09
Filing date: 2015-03-09
Publication date: 2020-05-12
Anticipated expiration: 2035-03-09
Also published as: JP6367466B2; WO2016143029A1; CN107407084A; EP3269886A1; JPWO2016143029A1; EP3269886A4

Abstract

A flush toilet is provided with: the toilet includes a toilet bowl having first and second water jet ports, a water supply unit for supplying washing water to the first and second water jet ports, and a drain pipe for draining residual water in the toilet bowl. The second water jet port sprays water to the rear region of the toilet bowl portion to form a second water flow, and the first water jet port is arranged forward of the second water jet port in the direction of the second water flow and sprays water to the upper portion of the toilet bowl portion to form a first water flow rotating in the circumferential direction. The opening of the second water jet is located above the opening of the first water jet.

Description

Water-washing type toilet

Technical Field

The present invention relates to a flush toilet, and more particularly to a flush toilet of a type that ejects flush water from a plurality of water ejection ports.

Background

In a water-flush toilet, a washing method is known in which washing water is ejected from one or more water ejection ports to a toilet bowl and dirt is pushed out to a drain pipe by the momentum of the washing water. Hereinafter, the force pushing the waste from the toilet bowl to the drain pipe is referred to as "discharge force". In addition, in order to prevent the residue of the filth from remaining on the inner wall surface of the toilet bowl, it is necessary to wash the water flow on the inner wall surface of the toilet bowl over a wide range. Hereinafter, the force for cleaning the inner wall of the toilet bowl is referred to as "cleaning force". In patent document 1, a first water jet is jetted from a first water jet provided at an upper portion of a left side of a toilet bowl along an inner wall of the toilet bowl to form a swirling water flow, thereby cleaning the inner wall of the toilet bowl (see fig. 4 of patent document 1). Further, the second water flow discharged from the second water discharge port provided in the upper portion of the right side of the toilet bowl is merged with the rotated first water flow, thereby strengthening the discharge force.

Patent document 1: international publication No. 2014/027499.

Disclosure of Invention

Problems to be solved by the invention

Thus, the flush toilet is required to have two functions of a discharge force and a cleaning force. According to the flush toilet described in patent document 1, both side surfaces and a front end surface of a toilet inner wall can be cleaned in a wide range by the first water flow.

The present inventors have further recognized that the rear end surface of the toilet inner wall, particularly the upper portion of the rear end surface (hereinafter simply referred to as "rear region"), is also easily contaminated with droplets of dirt. The first water flow of patent document 1 cleans the side surface, the front end surface, and the lower portion of the rear end surface of the inner wall of the toilet bowl, but may not reach the rear region (upper portion of the rear end surface) sufficiently. Further, the second water flow is used to reinforce the force of the downward flow of the first water flow, that is, the discharge force, and may not sufficiently reach the rear region.

The present invention has been made in view of the above-described problems recognized by the present inventors, and a main object thereof is to provide a technique for effectively cleaning a rear area of a toilet bowl which is easily contaminated by scattering of waste in a flush toilet.

Means for solving the problems

The flush toilet of the present disclosure includes a toilet main body and a water supply unit. The toilet main body includes: a toilet bowl having first and second water jet ports, and a drain pipe for draining the remaining water in the toilet bowl. The water supply unit supplies washing water to the first and second water jet ports.

The second water jet port sprays water to a rear region between the first and second water jet ports in a horizontal direction to form a second water flow. The first water jet is arranged ahead of the second water jet in the direction of the second water flow and sprays water to the upper part of the toilet bowl part to form a first water flow rotating in the circumferential direction.

The opening of the second water jet is located above the opening of the first water jet.

The water flush toilet having the above configuration further improves the cleaning effect of the water flush toilet by providing the water jet (second water jet) for cleaning the rear end surface, particularly the rear region which is the upper region, which is easily contaminated with the mist of the dirt. In order to clean the vicinity of the upper end of the rear region as much as possible, the second water jet is provided at a higher position than the first water jet.

In the toilet bowl with the above configuration, it is preferable that: the inner wall of the toilet bowl portion is further provided with a first water guide unit in the circumferential direction from the first water jet, and a second water guide unit in the circumferential direction from the second water jet. In this case, the second water guide unit is preferably continuously connected to the first water guide unit.

In the toilet bowl with the above configuration, it is preferable that: the first water guiding unit is terminated before reaching the second water jet.

In the toilet bowl with the above configuration, it is preferable that: the first water spray is distributed with a water amount more than 50% of the washing water supplied from the water supply part.

In the flush toilet configured as described above, the distance between the first water jet and the second water jet is preferably equal to or greater than 1/4 and equal to or less than 2/5 of the inner periphery of the toilet bowl.

Drawings

Fig. 1 is a bottom view of a flush toilet.

Fig. 2 is a side sectional view of the flush toilet.

Fig. 3 is a first perspective view of the water flush toilet.

Fig. 4 is a schematic diagram for explaining the relationship between the height of the first water jet and the height of the second water jet.

Fig. 5 is an enlarged perspective view of the vicinity of the first water jet.

Fig. 6 is a second perspective view of the water flush toilet.

Fig. 7 is a third perspective view of the flush toilet.

Fig. 8 is a perspective view of a flush toilet according to a first modification.

Fig. 9 is a perspective view of a flush toilet according to a second modification.

Fig. 10 is a perspective view of a flush toilet according to a third modification.

Detailed Description

Fig. 1 is a bottom view showing an example of a flush toilet. Fig. 2 is a side sectional view of the flush toilet illustrated in fig. 1.

In the following embodiments, a mode in which the inside of a toilet bowl is washed by making a swirling flow by jetting washing water from two water jet ports will be described as an example. However, the present invention is not limited to the configuration having two water discharge ports, and can be applied to a flush toilet 100 having two or more water discharge ports.

The flush toilet 100 is roughly divided into a toilet main body 102 and a water supply unit 104. The toilet body 102 includes a toilet bowl portion 106, a water storage portion 118, and a drain pipe 120. A water storage portion 118 is formed at a lower portion of the toilet portion 106, and a drain pipe 120 is connected to the toilet portion 106 via the water storage portion 118. Water supply unit 104 supplies washing water to toilet bowl unit 106.

Toilet bowl 106 is configured as a receptacle having a bowl-shaped inner wall for receiving waste. The toilet bowl portion 106 in the present embodiment includes two water discharge ports, a first water discharge port 112 (main water discharge port) and a second water discharge port 114 (sub water discharge port).

The water storage unit 118 stores the retained water, thereby blocking the odor of the drain pipe 120. The filth dropped to the water storage portion 118 is pushed out to the drain pipe 120 by the washing water together with the retained water.

A "water passage (a passage through which water is supposed to pass)" for the washing water is formed along the upper edge of the toilet bowl 106 at the upper end of the toilet bowl 106. The first water jet 112 is provided to communicate with a water passage along the upper edge of the toilet bowl portion 106. The washing water discharged from the first water discharge port 112 (hereinafter, the flow of the washing water discharged from the first water discharge port 112 is referred to as "first flow S1") is discharged from the first water discharge port 112 into the toilet bowl. That is, the first water stream S1 is ejected in the circumferential direction from the first water ejection port. The term "circumferential direction" as used herein means a direction along a water passage along the upper end of the toilet bowl. The first water flow S1 spirally drops in the toilet while circling or rotating on the inner wall surface (front end surface and both side surfaces) of the toilet bowl 102, falls into the water storage part 118, and is discharged from the drain pipe 120. The first water flow S1 provides a cleaning force by widely cleaning the inner wall of the toilet bowl 102 and also provides a discharge force by the water pressure at the time of the water drop.

On the other hand, the first purpose of the second water jet 114 is to wash the upper portion (rear region 110) of the rear end surface of the toilet bowl portion 102. The second water jet 114 is also provided in communication with a water passage provided along the upper edge of the toilet bowl 106. In the present embodiment, the first water jet port and the second water jet port serve as outlets through which the washing water in the water passage flows into the toilet bowl.

The rear region 110 is a region where urine directly contacts when a man urinates, and dirt is easily attached to the urine. Depending on the position and shape of the water storage unit, attached dirt resulting from urine, feces, droplets of other dirt, and/or jumping back may be attached more easily than to other parts. In order to remove the dirt adhering to rear region 110, a method of rotating first water stream S1 largely and making it reach rear region 110 may be considered, but in such a method, it is difficult to make the washing water of sufficient water potential and sufficient water amount reach the wide region of rear region 110, particularly the vicinity of the upper end of rear region 110. Therefore, in the present embodiment, the second water jet 114 is provided to clean the rear region 110 which is easily contaminated. The second water jet 114 not only cleans the rear region 110, but also serves as a part of the swirling water flow to help clean a wide region of the toilet bowl 106, and also serves as a part of the flow of pushing the waste toward the drain pipe 120 to help strengthen the discharge force (described later in detail).

The "rear region 110" in the present embodiment means a region above the rear portion of the inner wall of the toilet bowl 102, particularly a region where it is assumed that droplets of dirt are attached (contamination assumed region). The rear region 110 is at least the region from the first water jet 112 to the second water jet 114. More specifically, when the center of gravity of the inner periphery of the toilet bowl 102 is defined as P, an angle a formed by the rear region 110 with respect to the center of gravity P is defined as a range of 30 to 80 degrees, and a range of at least 30 to 60 degrees is defined as a circumferential length of the rear region 110. At least the height Z2 of the rear region 110 is equal to or less than half of the distance Z1 (see fig. 2) from the upper end of the toilet bowl 106 to the water surface of the water storage 118. In the present embodiment, a range from the upper end of the toilet bowl 106 to the second water guide unit 124 (described later) is defined as a height of the rear region 110. The "water guide unit" herein refers to a structure that protrudes inward from the toilet bowl 106 like a table or defines a water passage as a recess provided in the toilet bowl 106. The upper portion of the water guide unit does not necessarily have to be a horizontal surface, and may have a shape including an inclined surface.

The washing water discharged from the second water discharge port 114 (hereinafter, the flow of the washing water discharged from the second water discharge port 114 is referred to as "second flow S2") is discharged in the horizontal direction toward the rear region 110, and then merges with the first flow, which will be described in detail later. The "horizontal direction" herein does not mean a strictly horizontal direction, but means that the velocity vector in the horizontal direction is larger than the velocity vector in the vertical direction at least with respect to the initial velocity of the second water flow S2. The second water jet 114 is desirably cleaned in such a manner as to cover the vicinity of the upper end of the rear region 110 without leakage.

The first water jet 112 is formed forward (downstream) of the second water jet 114 in the direction of the second water stream S2 (counterclockwise in fig. 1). In fig. 1, when water flush toilet 100 is viewed from the X direction (front direction), second water jet 114 is formed at the rear right side, and first water jet 112 is formed at the left side. The rear region 110 is included in a range from the front end of the first water jet 112 to the front end of the second water jet 114. Specifically, the angle b (> a) formed by the front end of the first water jet 112 and the front end of the second water jet 114 with respect to the center of gravity P is in the range of 90 degrees (1/4 in the inner periphery of the toilet bowl) to 144 degrees (2/5 in the inner periphery of the toilet bowl), and more preferably in the range of 100 degrees to 140 degrees. It is preferable that most (more than 50% of the water amount) of the washing water supplied from the water supply unit 104 is distributed to the first water jet 112 and the rest is distributed to the second water jet 114.

A second water guide table 124 as a guide rail for the second water stream S2 is formed from a start point Q2 as the tip of the second water jet 114 to an end point R2 as the terminal end of the first water jet 112. The second water guide platform is an embodiment of the second water guide unit. The second water stream S2 emitted from the second water jet 114 is formed on the second water guide platform 124 (described in detail in connection with fig. 3 and 4). A first water guide table 122 as a guide rail for the first water stream S1 is formed from a starting point Q1, which is the front end of the first water jet 112, to the left side surface, the front end surface, and the right side surface of the toilet bowl 106. The first water guide platform is an embodiment of the first water guide unit. The first water deflection stage 122 terminates at an end point R1 immediately before the front end of the second water jet 114. Therefore, the opening 130 having the end point R1 and the start point Q2 of the second water guide 124 is formed. The opening 130 is described in detail with reference to fig. 7.

Fig. 3 is a first perspective view of the flush toilet 100.

The flush toilet 100 shown in fig. 3 is of a type that does not have a member (hanging portion) that protrudes inward from the upper end of the toilet bowl portion 106 and prevents water from jumping up to the toilet bowl upper surface 126. The flush toilet 100 can be designed simply by not having a suspended portion.

The second water jet 114 sprays washing water to the rear region 110 of the toilet bowl portion 102. The second water guide unit 124 is formed as a guide rail for the second water stream S2 from the second water jet 114 to the first water jet 112. The washing water sprayed from the second water spray 114 forms a second water stream S2 along the second water guide unit 124 after washing the rear region 110, and reaches the first water spray 112.

The first water jet 112 jets washing water in a circumferential direction on an upper portion of an inner wall of the toilet bowl portion 102. A first water guide unit 122 is formed along the circumferential direction of the toilet bowl portion 102 from the first water jet 112. The washing water discharged from the first water discharge port 112 forms a first water flow S1 along the first water guide unit 122, and rotates above the front end surface and the side surface of the toilet bowl 102, which will be described in detail later.

The second water deflection stage 124 smoothly, in other words continuously, merges with the first water deflection stage 122. Therefore, the second water flow S2 formed on the second water guide stage 124 smoothly merges with the first water flow S1 formed on the first water guide stage 122. In other words, the second water stream S2 becomes a part of the first water stream S1 in the vicinity of the first water jet 112, and integrally falls spirally while rotating on the upper portion of the inner wall of the toilet bowl 102. Hereinafter, the water flow obtained by merging the first water flow S1 and the second water flow S2 is referred to as "swirling water flow S0". The majority of the swirling water flow S0 is the first water flow S1, but also includes the second water flow S2.

Fig. 4 is a schematic diagram for explaining the relationship between the heights of the first water jet 112 and the second water jet 114. Fig. 5 is an enlarged perspective view of the vicinity of the first water jet 112.

As described above, the first water flow S1 serves to wash the toilet bowl 102 over a wide area by rotating along the first water guide unit 122 in the water passage (the upper portion of the inner wall of the toilet bowl 102), and to push out the filth stored in the water storage portion 118 toward the drain pipe 120. On the other hand, the main function of the second water stream S2 is to wash the rear area 110 locally. The rear region 110 has a potential for contamination near its upper end, so the water spray from the second water spray 114 preferably reaches as high a location of the rear region 110 as possible. Therefore, second water jet 114 is preferably set as high as possible to such an extent that second water flow S2 does not fly upward further than rear region 110 and flies to upper surface 126 of water flush toilet 100.

On the other hand, in the case of the first water flow S1, the necessity of reaching the upper end of the inner wall of toilet bowl 102 is lower than that of the second water flow S2. In view of the above design, in the present embodiment, the second water jet 114 is formed at a position higher than the first water jet 112. In fig. 4, the height of the lower end of the opening of the first water jet 112 is H4, the opening width of the first water jet 112 is Z4, the height of the upper end of the opening of the first water jet 112 is H6, and the height of the center of the opening of the first water jet 112 is H5. The "height" referred to herein is defined as a height from the bottom surface of the flush toilet 100, a height from the surface of the retained water in the water storage unit 118, or a height from the floor surface on which the flush toilet 100 is installed. In this case, H5 ═ H4+ Z4/2, and H6 ═ H4+ Z4.

Similarly, in fig. 4, the height of the lower end of the opening of the second water jet 114 is H1, the opening width of the second water jet 114 is Z3, the height of the upper end of the opening of the second water jet 114 is H2, and the height of the center of the opening of the second water jet 114 is H3. In this case, H3 ═ H1+ Z3/2 and H2 ═ H1+ Z3.

The phrase "the second water jet 114 is higher than the first water jet 112" means any one of the following:

(1) h1 ≧ H4 (bottom comparison) and H3 > H5 (center comparison)

(2) H1 < H4 (lower comparison), but H3 > H5 (center comparison) and H2 > H6 (upper comparison)

(3) H3 ≦ H5 (center comparison), but H1 > H4 (lower comparison).

The present embodiment (fig. 4) corresponds to (1).

(1) This means that when the opening centers (S3, S5) are compared, the second water jet 114 is located at a position higher than the first water jet 112, and when the opening lower ends are compared, the opening lower end of the second water jet 114 is at the same height as or at a height greater than the opening lower end of the first water jet 112. In this case, the second water guide unit 124 is horizontally or downwardly inclined from the second water jet 114.

(2) When the opening lower ends (S1, S4) are compared, the second water guide unit 124 is inclined upward because the second water jet 114 is lower than the first water jet 112. In contrast, the second water jet 114 is higher than the first water jet 112, both in the center of the opening and at the upper end of the opening.

(3) When the opening centers (S3, S5) are compared, the second water jet 114 is located lower than the first water jet 112, but when the opening lower ends (S1, S4) are compared, the second water jet 114 is located higher than the first water jet 112, and therefore the second water guide unit 124 is inclined downward.

In any of the above cases, it is important to apply higher potential energy to all or a part of the washing water ejected from the second water ejection port 114 than the washing water ejected from the first water ejection port 112 (for reasons described later).

In order to allow the first water flow S1 to wash the inner wall surface of the toilet bowl 102 in a wide area, more washing water is distributed to the first water jet 112 than to the second water jet 114. Therefore, if the first water jet 112 having a large water jet amount is provided at a high position, the water is more likely to be scattered than the second water jet 114 having a relatively small water jet amount. On the other hand, the second water jet 114 is easy to be located above the first water jet 112 because the amount of water jetted by the second water jet 114 is relatively small. From such a viewpoint, it is also reasonable to provide the second water jet 114 at a position higher than the first water jet 112, instead of distributing most (50% or more, preferably 70 to 85%) of the washing water to the first water jet 112.

The second water stream S2 is directed toward the first water jet 112 along the second water guide unit 124 inclined downward after cleaning the rear region 110. The second water guide unit 124 serves as a guide rail to form a passage for the second water stream S2. The second water guide unit 124 is smoothly combined with the first water guide unit 122 (see fig. 5). The term "smooth" as used herein means continuous (linear and continuous) and has no substantial step.

The first water stream S1 and the second water stream S2 are both counterclockwise when viewed from above, but the first water jet 112 is formed forward of the second water jet 114 in the direction of water flow. Therefore, if the heights of the first water jet 112 and the second water jet 114 are the same, the second water flow S2 loses a part of its kinetic energy (water potential) before merging with the first water flow S1, and therefore a difference in water potential between the two water flows is likely to occur at the time of merging. However, in the present embodiment, the second water jet 114 is located at a position higher than the first water jet 112, and a dominant amount of potential energy can be added to the second water flow S2. In this way, although the second water jet 114 jets water from the rear side of the first water jet 112, the second water jet 114 jets water from a position higher than the first water jet 112, and therefore the water potential of the first water flow can be made close to the water potential of the second water flow, and smooth merging of the two water flows can be achieved.

Assuming that 70 to 85% of the washing water is distributed to the first water jet 112, the arc from the front end of the first water jet 112 to the front end of the second water jet 114 is preferably about 1/4 to 2/5 of the entire circumference of the toilet bowl 102. With such a design, the rear region 110 to be cleaned (the assumed contamination region) is cleaned to the vicinity of the upper end thereof with relatively small amount of cleaning water from the second water jet 114 while securing a sufficient region size, and the second water stream S2 and the first water stream S1 are easily merged with each other at the same water potential.

If the first water jet 112 and the second water jet 114 are brought too close to each other, a certain water jet enters a part of the assumed contamination area (rear area 110) to be cleaned. For example, if the first water jet 112 is disposed at the rear side rather than the side, the first water jet 112 may be contaminated by dirt. In order to secure a sufficient size area as the contamination assumption area (rear area 110), the first water jet 112 and the second water jet 114 need to be isolated to some extent. Conversely, if the two water jets are too separated, the second stream will lose too much water potential before merging with the first stream. It needs to be designed in consideration of such balance.

Fig. 6 is a second perspective view of the flush toilet 100.

The first water flow S1 and the second water flow S2 merge to form a swirling water flow S0. The swirling water flow S0 is formed in the circumferential direction along the first water guide unit 122 on the upper portion of the inner wall of the toilet bowl 102. A part of the whirling water flow S0 falls from the first water guide unit 122 to wash the inner wall of the toilet bowl 102, and mostly turns around along the first water guide unit 122 to the end point R1 (see fig. 1). Thus, the first water guide unit 122 forms a water passage for the whirling water stream S0 as a guide rail for the whirling water stream S0.

Fig. 7 is a third perspective view of the flush toilet 100.

The first water guide platform 122 is formed around the inner wall of the toilet bowl 102, and a platform end portion 128 as an end portion thereof is formed in front of the second water jet port 114. The mesa end portion 128 gradually narrows and ends at the end point R1 just before the second water jet 114, so that a mesa discontinuous portion 130 is formed between the end point R1 and the second water jet 114 (see also fig. 1). The whirling water flow S0 whirling inside the toilet bowl 102 gradually loses its water potential before reaching the base end 128 of the first water guide base 122, and finally, most of the whirling water flow S0 falls from the opening 130 to the water storage 118. Since the toilet bowl 102 has a smooth inner wall surface at the pedestal discontinuity 130, the whirling water flow S0 falls smoothly into the water storage 118, and the dirt stored in the water storage 118 is strongly pushed out by the falling water. That is, by the falling of the swirling water flow S0, the discharging force is provided.

To summarize the above, the water flush toilet 100 can provide a local cleaning force targeting the rear area 110 in addition to the discharge force and the wide area cleaning force (targeting the front end face and the side face). The water ejected from the first water ejection port 112 washes the inner wall surface (front surface and side surface cleaning force) of the toilet bowl 102 while rotating widely along the first water guide unit 122, and drops down with a uniform amount of water after passing through the pedestal end portion 128, thereby strongly washing away the waste (ejection force).

On the other hand, the rear region 110 is cleaned by the water sprayed from the second water spray nozzles 114, i.e., shot cleaning, to form a second water flow S2 along the second water guide unit 124, and smoothly merges with the first water flow S1. Since the second water flow S2 becomes a part of the swirling water flow S0 even after the rear region 110 is cleaned, the second water flow S2 can be used without waste. Further, a second water jet 114 is provided at a relatively high position in order to clean the rear region 110, particularly the upper portion thereof, where dirt tends to remain in the past. With such a configuration, the cleaning effect as a whole of the toilet bowl portion 102 is improved.

Finally, the first to third modifications will be additionally described.

Fig. 8 is a perspective view of a flush toilet 100A according to a first modification.

In the first modification, the second water guide unit 124 and the first water guide unit 122 are not smoothly connected, but a step is provided therebetween. When the step is provided, the second water guide unit 124 may be horizontal, but may have a certain inclination as shown in fig. 4. According to the first modification, the second water flow S2 merges with the first water flow S1 so as to be covered with the first water flow S1. That is, the second water flow S2 can merge to ride on the first water flow S1.

Fig. 9 is a perspective view of a flush toilet 100B according to a second modification.

In the second modification, the hanging portion 132 is formed along the upper periphery of the toilet bowl portion 102. The hanging portion 132 has an effect of preventing water and dirt from scattering. Therefore, in the configuration in which the suspended portion 132 is provided, the second water jet 114 can be easily set higher.

Fig. 10 is a perspective view of a flush toilet 100C according to a third modification.

The third modification is a combination of the first and second modifications. That is, a step is provided on the first water guide unit 122 and the second water guide unit 124, and the hanging portion 132 is formed.

As described above, by continuously connecting the first water guide unit 122 and the second water guide unit 124, which serve as a guide for the water spray from the first water spray 112, the first water flow S1 and the second water flow S2 can be easily merged smoothly. Most of the water current circulating in the first water guide unit 122 is caused to fall in front of the second water discharge port 114. By making the first water stream S1 fall in an emergency while keeping the strength after rotating once in the toilet, the waste can be easily and effectively flushed toward the drain pipe. The rear region 110 to be cleaned (assumed contaminated region) is cleaned in a relatively small amount of cleaning water from the second water jet 114 in a wide region while securing a sufficient size of the region, and the second water stream S2 is easily merged with the first water stream S1 at the same water potential.

According to the present invention represented by the above-described embodiments, the height in the vertical direction of the second water jet is set to be higher than the height in the vertical direction of the first water jet, and thus the water flow can be efficiently delivered to the area where dirt is likely to adhere in the rear of the upper portion in the toilet while maintaining the function of the auxiliary water flow as the auxiliary rotation. As a result, the upper rear region to which dirt is likely to adhere can be efficiently and effectively cleaned without increasing the amount of water used.

Further, by continuously configuring the starting point of the first water guide unit and the end point of the second water guide unit with respect to the direction in which water rotates, the first water flow and the second water flow can be smoothly merged, and the water flow can be efficiently utilized for toilet cleaning performance.

Further, by discontinuously configuring the end point of the first water guide unit and the start point of the second water guide unit with respect to the direction in which water is rotated, it is easy to cause a large number of water flows guided by the first water guide unit and revolving in the toilet bowl to fall in front of the second water discharge port. By making the first water flow drop rapidly while keeping the first water flow after rotating once in the toilet, the filth can be easily and effectively flushed off to the drain pipe.

Further, by the configuration in which the circumferential distance between the first water jet and the second water jet is set to be within 1/4 or more and 2/5 of the inner circumference of the toilet bowl portion, the swirling flow can be efficiently formed without increasing the amount of water used, and the area behind the upper portion of the inner surface of the toilet bowl where dirt is likely to adhere can be efficiently cleaned by the water flow discharged from the second water jet. The structure is characterized in that the water volume sprayed from the first water spray opening and the water volume sprayed from the second water spray opening are (7-8.5): the ratio of (3 to 1.5) is most effective.

The present invention is not limited to the above-described embodiments, and various changes, modifications, and improvements can be made without departing from the scope of the claims, and such changes, modifications, and improvements also fall within the scope of the claims of the present invention. Embodiments that are otherwise construed to be equivalent in shape, function, and configuration to those in the present disclosure are also included in the scope of the present invention.

Practicality of use

The present invention is applicable to a flush toilet, and particularly to a flush toilet of a type that ejects flush water from a plurality of water ejection ports.

Claims

1. A flush toilet is characterized by comprising:

a toilet body including a toilet bowl portion having a first water jet and a second water jet, and a drain pipe for draining residual water in the toilet bowl portion; and

a water supply unit for supplying washing water to the first water jet and the second water jet,

the second water jet jets spray water to a rear region between the first water jet jets and the second water jet jets to form a second water flow,

the first water jet is arranged ahead of the second water jet in the direction of the second water flow, and jets water to the upper part of the toilet bowl part to form a first water flow rotating in the circumferential direction,

the opening of the second water jet is positioned above the opening of the first water jet,

a first water guide unit is formed on the inner wall of the toilet bowl portion in the circumferential direction from the first water jet, a second water guide unit is formed on the inner wall of the toilet bowl portion in the circumferential direction from the second water jet, and the second water guide unit is continuously connected to the first water guide unit,

the first water guiding unit is terminated before reaching the second water jet.

2. A flush toilet is characterized by comprising:

a first water guide unit is further formed in the inner wall of the toilet bowl portion in a circumferential direction from the first water jet, and the first water guide unit is terminated before reaching the second water jet.

3. The water flush toilet according to claim 1 or 2,

an amount of water exceeding 50% of the washing water supplied from the water supply part is distributed to the first water spray ports.

4. The water flush toilet according to claim 1 or 2,

the distance between the first water jet and the second water jet is 1/4 or more and 2/5 or less of the inner circumference of the toilet bowl.

5. The flush toilet according to claim 3,