JP2021134602A - Flush toilet bowl - Google Patents

Abstract

To provide a flush toilet bowl capable of restoring seal water in a bowl part up to a predetermined water level after finishing cleaning while utilizing energy of cleaning water effectively to the cleaning during the cleaning.SOLUTION: A water supply chamber of a flush toilet bowl is connected to a water supply source via an upstream side opening, is connected to a rim guide conduit that guides cleaning water to a rim discharge port via a rim connection opening, and is connected to a jet guide conduit that guides the cleaning water to a jet discharge port via a jet connection opening. The flush toilet bowl is formed such that an opening area of the upstream side opening is larger than the sum of an opening area of the rim connection opening and an opening area of the jet connection opening. The flush toilet bowl is formed such that a height of a bottom face of the jet connection opening is lower than a height of a bottom face the water supply chamber immediately below the upstream side opening.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with wash water supplied from a water supply source.

Conventionally, as a flush toilet that is washed with wash water supplied from a water supply source, for example, the configuration described in Patent Document 1 is known. As shown in FIG. 4, the water-washing toilet described in Patent Document 1 has a bowl portion 104 having a bowl-shaped filth receiving surface and a rim portion 103 formed on the upper edge of the filth receiving surface, and a filth receiving surface. A drainage channel 105 connected to the lower part of the surface, a rim spout 103a provided on the rim portion 103 to discharge washing water toward the inside of the sewage receiving surface, and a rim spout 103a provided on the lower part of the sewage receiving surface and directed toward the inside of the sewage receiving surface. It also includes a jet spout 107 that discharges wash water toward the inlet of the drainage channel 105, and a water supply chamber 111 that is connected to the water supply source.

The water supply chamber 111 (consisting of the upper space 111a and the lower space 111b in the illustrated example) is connected to the water supply source via the upstream opening (water supply port) 110, and is connected to the water supply source via the rim water supply chamber 103c and the rim water discharge port 103a. It is connected to the rim headrace 103b (rim headrace) that guides the wash water to the rim, and is further connected to the jet headrace 108 that guides the wash water to the jet spout 107.

Further, in the flush toilet described in Patent Document 1, the flush water supplied from the water supply source is used to restore the sealed water in the bowl portion 104 to the predetermined water level 114 in a short time after the cleaning is completed. A make-up water storage unit 109 is provided to store a part of the water so that it can be used as make-up water immediately after washing.

Specifically, when the make-up water storage unit 109 is provided so as to branch from the jet headrace 108 via the communication hole 112 and the wash water is guided from the jet headrace 108 to the jet spout 107 at the time of washing. In addition, the washing water is guided from the jet headrace 108 to the make-up water storage portion through the communication hole 112. Then, after the completion of the jet water discharge from the jet water discharge port 107 (that is, after the completion of cleaning), the cleaning water (of which the cleaning water that was temporarily stored by being guided to the make-up water storage unit 109) is stored above the communication hole 112. By the action of the head pressure, the water is returned to the jet headrace 108 as make-up water and is replenished from the jet spout 107.

With such a configuration, the sealing water in the bowl portion 104 can be returned to the predetermined water level 114 in a shorter time after the washing is completed. As a result, problems such as backflow of offensive odors are effectively suppressed.

JP-A-2002-364506

However, in the flush toilet described in Patent Document 1, a replenishment for storing a part of the wash water through the communication hole 112 in the middle of the jet headrace 108 for supplying the wash water to the jet spout 107. The water storage unit 109 is connected. As a result, a part of the energy of the washing water guided to the jet headrace 108 is used to guide the washing water to the make-up water storage unit 109 through the communication hole 112, that is, it is effective for the washing action. Not utilized in.

The present invention has been made to improve the above-mentioned problems. An object of the present invention is that while the energy of the washing water can be used more effectively for washing during washing, the water sealing in the bowl portion after the washing can be returned to a predetermined water level in a short time. To provide a toilet bowl.

The present invention provides a bowl portion having a bowl-shaped filth receiving surface and a rim portion formed on the upper edge of the filth receiving surface, a drainage channel connected to the lower part of the filth receiving surface, and the rim portion. A rim spout that discharges wash water toward the inside of the filth receiving surface, and a rim spout that is provided below the filth receiving surface and discharges washing water toward the inside of the filth receiving surface and toward the entrance of the drainage channel. It is provided with a jet spout and a water supply chamber connected to the water supply source. The water supply chamber is connected to the water supply source via an upstream opening, and is washed to the rim spout through the rim connection opening. It is connected to the rim headrace that guides water, and is connected to the jet headrace that guides the washing water to the jet spout through the jet connection opening. It is formed so as to be larger than the total of the opening area of the rim connection opening and the opening area of the jet connection opening, and the height of the bottom surface of the water supply chamber directly below the upstream side opening of the jet connection opening. It is a flush urinal characterized in that it is formed so that the height of the bottom surface is lower.

According to the present invention, since the opening area of the upstream opening is formed to be larger than the total of the opening area of the rim connecting opening and the opening area of the jet connecting opening, a relatively large amount can be obtained in a short time from the water supply source. The supplied wash water passes through the jet connection opening after being temporarily stored in the water supply chamber (for example, filling the water supply chamber). As a result, the wash water temporarily stored in the water supply chamber can be used as make-up water after jet cleaning, that is, the water sealed in the bowl portion after jet cleaning is completed can be quickly reached to a predetermined water level. It can be restored.

Further, according to the present invention, since it is not necessary to provide a make-up water storage unit separately from the jet headrace, the configuration of the toilet bowl is simplified and the energy of the washing water introduced into the jet headrace is more effective. Can be used for cleaning.

Further, according to the present invention, since the height of the bottom surface of the jet connection opening is lower than the height of the bottom surface of the water supply chamber directly below the upstream opening, it is temporarily stored in the water supply chamber. Since the washing water is guided to the jet connection opening in a more accelerated state by utilizing its own weight, the sealing water in the bowl portion after the jet washing is completed can be returned to the predetermined water level in a shorter time.

In the present invention, preferably, at least a part of the bottom surface of the water supply chamber is formed by an inclined surface that inclines downward toward the jet connection opening. In this case, the wash water temporarily stored in the water supply chamber is guided to the jet connection opening more smoothly in a state of being accelerated by utilizing its own weight.

In the present invention, preferably, the upper end of the inclined surface is formed above the upper end of the jet connection opening. In this case, since the degree of downward inclination of the inclined surface that is downwardly inclined toward the jet connection opening is relatively large, the washing water temporarily stored in the water supply chamber is further accelerated by its own weight. , Is guided to the jet connection opening more smoothly.

In the present invention, preferably, the lower end of the inclined surface is formed so as to be continuous with the bottom surface of the jet connection opening. In this case, the wash water temporarily stored in the water supply chamber is guided to the jet connection opening more smoothly by utilizing its own weight.
Further, in the flush toilet described in Patent Document 1, there is a problem that the flush water guided below the communication hole 112 of the make-up water storage unit 109 becomes so-called "dead water" and stays there. However, according to this feature, this problem can be effectively avoided.

In the present invention, preferably, the opening area of the jet connection opening is formed to be larger than the opening area of the rim connection opening. In this case, the wash water temporarily stored in the water supply chamber is more likely to be guided to the jet connection opening connected to the jet headrace than to the rim connection opening connected to the rim headrace. As a result, more water can be supplied from the jet spout, which is less visible to the user than the rim spout, to restore the sealed water in the bowl after the jet cleaning is completed. This makes it difficult for the user to be aware that water that does not contribute to the cleaning of the toilet bowl is being discharged into the toilet bowl after cleaning the toilet bowl, and there is concern that the water may continue to flow unnecessarily after cleaning the toilet bowl. Can be reduced.

Alternatively, the present invention includes a bowl portion having a bowl-shaped filth receiving surface, a rim portion formed on the upper edge of the filth receiving surface, a drainage channel connected to the lower part of the filth receiving surface, and the above. A rim spout that is provided on the rim portion and discharges washing water toward the inside of the filth receiving surface, and a rim spout that is provided at the lower part of the filth receiving surface and is directed toward the inside of the filth receiving surface and toward the entrance of the drainage channel. It is provided with a jet spout for discharging wash water and a water supply chamber connected to the water supply source. The water supply chamber is connected to the water supply source via an upstream opening and is connected to the water supply source through a rim connection opening. It is connected to the rim headrace that guides the wash water to the rim spout, and is connected to the jet headrace that guides the wash water to the jet spout through the jet connection opening. The opening area is formed so as to be larger than the sum of the opening area of the rim connection opening and the opening area of the jet connection opening, and at least a part of the bottom surface of the water supply chamber is directed toward the jet connection opening. It is a flush urinal characterized by being formed by a downwardly sloping inclined surface.

Also in the present invention, since the opening area of the upstream opening is formed to be larger than the total of the opening area of the rim connecting opening and the opening area of the jet connecting opening, a relatively large amount is supplied from the water supply source in a short time. The wash water to be washed passes through the jet connection opening after being temporarily stored in the water supply chamber (for example, filling the water supply chamber). As a result, the wash water temporarily stored in the water supply chamber can be used as make-up water after jet cleaning, that is, the water sealed in the bowl portion after jet cleaning is completed can be quickly reached to a predetermined water level. It can be restored.

Further, also in the present invention, since it is not necessary to provide a make-up water storage unit separately from the jet headrace, the configuration of the toilet bowl is simplified and the energy of the washing water introduced into the jet headrace is more effective. Can be used for cleaning.

Further, according to the present invention, since at least a part of the bottom surface of the water supply chamber is formed by an inclined surface that inclines downward toward the jet connection opening, the washing water temporarily stored in the water supply chamber is its own weight. Since the water is smoothly guided to the jet connection opening in a more accelerated state by utilizing the above, the water sealing in the bowl portion after the jet cleaning is completed can be returned to the predetermined water level in a shorter time.

According to the present invention, since the opening area of the upstream opening is formed to be larger than the total of the opening area of the rim connecting opening and the opening area of the jet connecting opening, a relatively large amount can be obtained in a short time from the water supply source. The supplied wash water passes through the jet connection opening after being temporarily stored in the water supply chamber (for example, filling the water supply chamber). As a result, the wash water temporarily stored in the water supply chamber can be used as make-up water after jet cleaning, that is, the water sealed in the bowl portion after jet cleaning is completed can be quickly reached to a predetermined water level. It can be restored.
Further, according to the present invention, since it is not necessary to provide a make-up water storage unit separately from the jet headrace, the configuration of the toilet bowl is simplified and the energy of the washing water introduced into the jet headrace is more effective. Can be used for cleaning.
Further, according to one feature of the present invention, the height of the bottom surface of the jet connection opening is lower than the height of the bottom surface of the water supply chamber directly below the upstream opening, so that the water supply chamber is formed. Since the wash water temporarily stored in the bowl is guided to the jet connection opening in a more accelerated state by using its own weight, the sealed water in the bowl after the jet wash is completed is returned to the predetermined water level in a shorter time. be able to. Alternatively, according to another feature of the present invention, at least a part of the bottom surface of the water supply chamber is formed by an inclined surface that inclines downward toward the jet connection opening, so that the water supply chamber is temporarily stored. Since the washing water is smoothly guided to the jet connection opening in a more accelerated state by using its own weight, it is possible to return the sealing water in the bowl part to the predetermined water level in a shorter time after the jet washing is completed. can.

It is a schematic plan view of the flush toilet according to one embodiment of the present invention. It is sectional drawing seen along the line II-II of FIG. It is an enlarged view of the water supply chamber of FIG. It is sectional drawing of the flush toilet by patent document 1. FIG.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic plan view of the flush toilet bowl 1 according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is an enlarged view of the water supply chamber 8 of FIG.

(composition)
As shown in FIG. 1, the flush toilet bowl 1 according to the present embodiment includes a toilet bowl main body 2 and a water storage tank device attached to the rear upper part of the toilet bowl main body 2 as a water supply source for supplying wash water to the toilet bowl main body 2. , Is equipped.

The water storage tank device is in a state in which the washing water previously supplied by an external water supply pipe (not shown) is stored before the start of washing. The water storage tank device is provided with a drain valve (not shown), and the drain valve is opened and closed by the user's operation on an operation lever (not shown) or the like. By opening the drain valve, wash water is supplied to the toilet bowl main body 2.

The water supply source for supplying the washing water to the toilet bowl body 2 is not limited to the gravity water supply tank type water supply source such as the water storage tank device shown in the present embodiment, and the water supply directly uses the water supply pressure of tap water. It may be a direct pressure type water supply source, a flush valve type water supply source, a water supply source that supplies washing water by using the pressure of a pump, or the like.

The toilet bowl body 2 is made of pottery having a glaze layer formed on its surface, and as shown in FIG. 2, a bowl portion 6 is formed in the upper part of the front surface (right side of FIG. 2). The bowl portion 6 has a bowl-shaped filth receiving surface 12 and a rim portion 14 formed on the upper edge of the filth receiving surface 12. The rim portion 14 is formed in a state of being overhanged toward the inside of the filth receiving surface 12.

A drainage channel 10 for discharging filth is connected to the lower rear part of the filth receiving surface 12. Further, in front of the lower part of the filth receiving surface 12, a jet spout 20 for discharging wash water toward the inside of the filth receiving surface 12 and toward the inlet 10a of the drainage channel 10 is provided. On the other hand, the rim portion 14 is provided with a rim spout port 16 for spouting wash water toward the inside of the filth receiving surface 12. The rim spout 16 forms a swirling flow in the filth receiving surface 12.

Further, as shown in FIG. 2, a sealing water is stored below the filth receiving surface 12. In FIG. 2, the water level W0 of the sealed water is indicated by a alternate long and short dash line.

Further, as shown in FIG. 2, the drainage channel 10 is formed by an ascending pipe line 10b extending upward from the inlet 10a and a descending pipe line 10c connected to the downstream end of the ascending pipe line 10b and extending downward. .. The lower end of the descending pipe line 10c is connected to the discharge pipe (not shown) via a joint (not shown). That is, the drainage channel 10 has a trap flow path including an ascending pipe line 10b and a descending pipe line 10c. As a result, while the water level W0 of the sealed water is located above the inlet 10a of the drainage channel 10, it is possible to prevent the backflow of offensive odor from the discharge pipe (not shown).

As shown in FIGS. 2 and 3, in the toilet bowl main body 2, a water supply chamber 8 connected to the water storage tank device is formed behind the upper part of the bowl portion 6. The water supply chamber 8 is connected to the water storage tank device via the upstream opening 8a, and is connected to the rim headrace 15 for guiding the wash water to the rim spout 16 via the rim connection opening 8b. It is connected to the jet headrace 18 that guides the washing water to the jet spout 20 through the connection opening 8c.

In the present embodiment, the opening area of the upstream opening 8a is formed to be larger than the total of the opening area of the rim connecting opening 8b and the opening area of the jet connecting opening 8c. More specifically, in the present embodiment, the upstream opening 8a is a circular opening with a diameter of 57 mm and is opened vertically (area 2550 mm ² ), and the rim connection opening 8b is a circular opening with a diameter of 10 mm and is opened horizontally. (Area 78.5 mm ² ), the jet connection opening 8c is a substantially rectangular opening with a height of about 15 mm and a width of about 65 mm, which opens in the horizontal direction (area 975 mm ² ).

Further, in the present embodiment, the height of the upper end of the jet connection opening 8c is lower than the height of the bottom surface of the water supply chamber 8 directly below the upstream opening 8a. More specifically, in the present embodiment, the bottom surface of the water supply chamber 8 directly below the upstream opening 8a is formed on the opening surface of the upstream opening 8a (about 30 mm to 40 mm below the upper surface of the toilet body 2). The height of the upper end of the jet connection opening 8c is formed to be about 55 mm to 65 mm below the opening surface (upper surface of the toilet bowl body 2) of the upstream opening 8a. The height of the upper end of the rim connection opening 8b is located about 30 mm to 40 mm below the opening surface (upper surface of the toilet bowl body 2) of the upstream opening 8a.

Further, in the present embodiment, the entire bottom surface of the water supply chamber 8 is formed by an inclined surface that inclines downward toward the jet connection opening 8c. Specifically, the bottom surface of the water supply chamber 8 is inclined as a cylindrical surface having a radius of curvature of about 40 cm that causes a height difference of 40 mm depending on the length 160 mm in the front-rear direction of the water supply chamber 8 in the cross section shown in FIG. There is. (In the present embodiment, the bottom surface of the water supply chamber 8 is not inclined in the left-right direction (vertical direction in FIG. 1), but is also inclined in the left-right direction according to the position or shape of the jet connection opening 8c. (A slope that dents toward the jet connection opening 8c or a convex slope that decreases in the left-right direction) may be provided.)

In the present embodiment, the position of the upper end of the bottom surface of the water supply chamber 8 (the rearmost end of the water supply chamber 8) is located above the upper end of the jet connection opening 8c due to the above dimensional configuration.

Further, in the present embodiment, as shown in FIG. 2, the lower end of the bottom surface of the water supply chamber 8 (the frontmost end of the water supply chamber 8) is continuous with the bottom surface of the jet connection opening 8c. Specifically, as shown in FIG. 2, the bottom surface of the jet connection opening 8c is an inclined surface that is substantially continuous with the bottom surface of the water supply chamber 8.

Further, in the present embodiment, the opening area of the jet connection opening 8c is larger than the opening area of the rim connection opening 8b due to the above dimensional configuration.

(Action)
Next, the operation of the flush toilet bowl 1 according to the present embodiment will be described.

When the user operates an operation lever (not shown) or the like, the drain port of the water storage tank device is opened, and a predetermined amount of washing water flows into the water supply chamber 8 through the upstream opening 8a. A part of the washing water passes through the rim connection opening 8b and the rim headrace, and is discharged from the rim spout 16 to swirl and wash the inside of the filth receiving surface 12. The other part of the washing water is jet-discharged from the jet spout 20 through the jet connection opening 8c and the jet headrace 18, and is discharged from the drain pipe 10 together with the filth in the filth receiving surface 12 (shown). It is discharged to.

On the other hand, since the opening area of the upstream side opening 8a is formed to be larger than the total of the opening area of the rim connecting opening 8b and the opening area of the jet connecting opening 8c, still a part of the washing water is used. It is temporarily stored in the water supply chamber 8 (for example, (for example, a part of) the water supply chamber 8 is filled). Then, the other part of the washing water opens the jet connection opening 8c with a slight delay in time after the washing water immediately discharged from the jet spout 20 performs jet washing with a siphon action. pass. As a result, still another part of the washing water can be effectively used as make-up water after the jet washing, that is, the sealing water in the bowl portion 6 after the jet washing is completed is determined in a short time. It can be returned to the water level.

(effect)
Next, the effect of the flush toilet bowl 1 according to the present embodiment will be described.

As described above, according to the flush toilet bowl 1 of the present embodiment, the opening area of the upstream opening 8a is formed to be larger than the total of the opening area of the rim connecting opening 8b and the opening area of the jet connecting opening 8c. Therefore, a relatively large amount of wash water supplied from the water storage tank device (an example of the water supply source) in a short time passes through the jet connection opening 8c after being temporarily stored in the water supply chamber 8. As a result, the wash water temporarily stored in the water supply chamber 8 can be effectively used as make-up water after jet washing.

Further, according to the present embodiment, it is not necessary to provide a make-up water storage unit (see the make-up water storage unit 109 in FIG. 4) separately from the jet headrace 18. Therefore, the configuration of the toilet bowl main body 2 can be simplified, and the energy of the washing water introduced into the jet headrace 18 can be more effectively used for washing.

Further, according to the present embodiment, the height of the bottom surface of the jet connection opening 8c is lower than the height of the bottom surface of the water supply chamber 8 directly below the upstream opening 8a, so that the water supply chamber is formed. The wash water temporarily stored in 8 is guided to the jet connection opening 8c in a more accelerated state by utilizing its own weight. As a result, the water level W0 of the sealed water in the bowl portion 6 after the jet cleaning is completed can be returned above the inlet 10a of the drainage channel 10 in a shorter time, and can be returned from the discharge pipe (not shown). The risk of backflow of offensive odors can be effectively reduced.

Further, according to the present embodiment, the bottom surface of the water supply chamber 8 is directed from a position directly below the upstream opening 8a behind the water supply chamber 8 toward a position adjacent to the jet connection opening 8c in front of the water supply chamber 8. Since the surface is gradually inclined downward, the washing water temporarily stored in the water supply chamber 8 is guided to the jet connection opening 8c more smoothly in a more accelerated state by utilizing its own weight.

Further, according to the present embodiment, the position of the upper end of the bottom surface of the water supply chamber 8 is above the position of the upper end of the jet connection opening 8c, that is, the degree of downward inclination toward the jet connection opening 8c is relatively large. .. Therefore, the wash water temporarily stored in the water supply chamber 8 is guided to the jet connection opening 8c more smoothly in a state of being further accelerated by utilizing its own weight.

Further, according to the present embodiment, since the lower end of the bottom surface of the water supply chamber 8 is formed so as to be continuous with the bottom surface of the jet connection opening 8c, the washing water temporarily stored in the water supply chamber 8 utilizes its own weight. Then, it is guided to the jet connection opening 8c more smoothly in a more accelerated state.

Further, according to the present embodiment, since the opening area of the jet connection opening 8c is formed to be larger than the opening area of the rim connection opening 8b, the water sealing in the bowl portion 6 after the jet cleaning is completed. More water can be supplied from the jet spout 20 having a lower visibility to the user than the rim spout 16. This makes it difficult for the user to be aware that water that does not contribute to cleaning the toilet bowl body 2 is discharged into the bowl portion 6 after cleaning the toilet bowl, and the water does not continue to flow unnecessarily after cleaning the toilet bowl. It is possible to reduce the risk of giving the user anxiety about the problem.

In the above embodiment, the entire bottom surface of the water supply chamber 8 is formed by an inclined surface that inclines downward toward the jet connection opening 8c, but only a part of the bottom surface of the water supply chamber 8 has the jet connection opening 8c. An inclined surface that inclines downward may be provided.

Further, in the above embodiment, the rim connection opening 8b, the rim headrace 15 and the rim spout 16 are provided only on the left side of the toilet bowl body 2 (lower side in FIG. 1), but on the left side side of the toilet bowl body 2. It may be provided on each of the right side. In this case, "the total of the opening area of the rim connection opening 8b and the opening area of the jet connection opening 8c" means "the total of the opening area of the plurality of rim connection openings 8b and the opening area of the jet connection opening 8c". Become.

1 Washing urinal 2 Toilet bowl body 6 Bowl part 8 Water supply chamber 8a Upstream side opening 8b Rim connection opening 8c Jet connection opening 10 Drainage channel 10a Inlet 10b Ascending line 10c Down line 12 Sewage receiving surface 14 Rim part 15 Rim headrace 16 Rim spout 18 Jet headrace 20 Jet spout 103 Rim spout 103a Rim spout 103b Rim headrace 103c Rim water supply chamber 104 Bowl 105 Drainage channel 107 Jet spout 108 Jet headrace 109 Supply water storage 111a Upper part Space 111b Lower space 112 Communication hole 114 Predetermined water level W0 Water level

Claims (6)

A bowl portion having a bowl-shaped filth receiving surface and a rim portion formed on the upper edge of the filth receiving surface.
The drainage channel connected to the lower part of the filth receiving surface and
A rim spout that is provided on the rim and discharges wash water toward the inside of the filth receiving surface.
A jet spout that is provided at the bottom of the filth receiving surface and discharges wash water toward the inside of the filth receiving surface and toward the entrance of the drainage channel.
The water supply room connected to the water source and
With
The above water supply room
It is connected to the above water supply source through the upstream opening,
It is connected to the rim headrace that guides the wash water to the rim spout through the rim connection opening.
It is connected to the jet headrace that guides the wash water to the jet spout through the jet connection opening.
The opening area of the upstream opening is formed so as to be larger than the total of the opening area of the rim connecting opening and the opening area of the jet connecting opening.
A flush toilet bowl characterized in that the height of the bottom surface of the jet connection opening is lower than the height of the bottom surface of the water supply chamber directly below the upstream opening. The flush toilet according to claim 1, wherein at least a part of the bottom surface of the water supply chamber is formed by an inclined surface that inclines downward toward the jet connection opening. The flush toilet according to claim 2, wherein the upper end of the inclined surface is formed above the upper end of the jet connection opening. The flush toilet according to claim 2 or 3, wherein the lower end of the inclined surface is formed so as to be continuous with the bottom surface of the jet connection opening. The flush toilet according to any one of claims 2 to 4, wherein the opening area of the jet connection opening is formed to be larger than the opening area of the rim connection opening. A bowl portion having a bowl-shaped filth receiving surface and a rim portion formed on the upper edge of the filth receiving surface.
The drainage channel connected to the lower part of the filth receiving surface and
A rim spout that is provided on the rim and discharges wash water toward the inside of the filth receiving surface.
A jet spout that is provided at the bottom of the filth receiving surface and discharges wash water toward the inside of the filth receiving surface and toward the entrance of the drainage channel.
The water supply room connected to the water source and
With
The above water supply room
It is connected to the above water supply source through the upstream opening,
It is connected to the rim headrace that guides the wash water to the rim spout through the rim connection opening.
It is connected to the jet headrace that guides the wash water to the jet spout through the jet connection opening.
The opening area of the upstream opening is formed so as to be larger than the total of the opening area of the rim connecting opening and the opening area of the jet connecting opening.
A flush toilet characterized in that at least a part of the bottom surface of the water supply chamber is formed by an inclined surface that inclines downward toward the jet connection opening.

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