JP6963209B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that cleans the toilet with washing water supplied from a washing water source and discharges filth.

In recent years, the importance of effective use of water resources has increased, for example, in consideration of how to deal with droughts. On the other hand, clean water is mostly used as the washing water used for flush toilets. It can also be said that drinking water is used to transport filth.

It has also been proposed to reduce the use of clean water by using rainwater as part of the wash water used for flush toilets. Specifically, it has been proposed to use a rainwater storage tank that stores rainwater together.

However, if it does not rain or the flush toilet is used frequently, the amount of water in the rainwater storage tank becomes insufficient, and the amount of water required for cleaning the flush toilet and transporting filth cannot be secured. Problems such as poor cleaning of flush toilets occur.

Therefore, in the configuration disclosed in Patent Document 1, in order to solve such a problem, a water supply tank (tap water tank) and a rainwater tank (medium water tank) are provided side by side, and the amount of water in the rainwater tank is insufficient. When doing so, the structure is adopted in which tap water is replenished from the tap water tank to the rainwater tank.

Japanese Unexamined Patent Publication No. 2016-79006

The inventor of the present invention recognizes the problem that the structure according to Patent Document 1 is complicated and large in size because it is necessary to fulfill the function of moving water between two tanks, and in order to solve the problem. We have been diligently studying.

An object of the present invention is to provide a flush toilet that can effectively use rainwater and has a relatively simple structure and can avoid an increase in size.

The present invention includes a toilet bowl having a bowl surface, a drain pipe connected to the toilet bowl to discharge filth from the toilet bowl, a rainwater storage tank for storing rainwater, and a detection means for detecting the amount of water in the rainwater storage tank. When connected to the rainwater storage tank, and rainwater replenishment path for replenishing the rainwater stored in the rainwater storage tank to the drain pipe without passing through the toilet, clean water to the drain pipe without passing through the toilet bowl A flush-type toilet provided with a clean water replenishment route for replenishment, and the flush-type toilet has the rainwater when the toilet is washed when the amount of water detected by the detection means is equal to or more than a predetermined amount. When the rainwater stored in the rainwater storage tank is replenished to the drain pipe by the replenishment route and the amount of water detected by the detection means is less than a predetermined amount, when the toilet bowl is washed, the said The flush type toilet is characterized in that clean water is replenished to the drain pipe by a clean water replenishment route.

According to the present invention, when the amount of water in the rainwater storage tank is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank is replenished to the drain pipe without going through the toilet bowl when cleaning the toilet bowl. As a result, rainwater can be effectively used and water resources can be effectively used. When the amount of water in the rainwater storage tank is less than a predetermined amount, the clean water is replenished to the drain pipe without passing through the rainwater storage tank by the clean water replenishment route when cleaning the toilet bowl. .. By adopting such a configuration, it is possible to effectively suppress the occurrence of problems when there is a shortage of rainwater, but since it is not necessary to move water between the two tanks, the structure becomes complicated and the structure becomes large. It can be avoided. Further, it becomes easy to arrange the rainwater storage tank at a position away from the toilet bowl.

For example, the clean water replenishment route is connected to a clean water tank for storing clean water, and the flush toilet is used to wash the toilet when the amount of water detected by the detection means is less than a predetermined amount. At times, the clean water stored in the clean water tank is replenished to the drain pipe by the clean water replenishment route.

According to this, it is not necessary to complicate the structure of the stormwater storage tank, and it is not necessary to lengthen the clean water replenishment route.

Further, the present invention includes a drainage pipe connected to the toilet bowl for discharging filth from the toilet bowl, a rainwater storage tank for storing rainwater, a detection means for detecting the amount of water in the rainwater storage tank, and the rainwater storage. It is provided with a rainwater replenishment route that is connected to the tank and replenishes the rainwater stored in the rainwater storage tank to the toilet bowl or the drain pipe, and a clean water replenishment route that replenishes the toilet bowl or the drain pipe with clean water. In a water-washing toilet, when the amount of water detected by the detection means is equal to or greater than a predetermined amount, the toilet is stored in the rainwater storage tank by the rainwater replenishment route at the time of washing the toilet. When rainwater is replenished to the toilet bowl or the drain pipe and the amount of water detected by the detection means is less than a predetermined amount, the clean water is replenished by the clean water replenishment route at the time of cleaning the toilet bowl. The toilet bowl or the drainage pipe is replenished, the clean water replenishment route is connected to a clean water tank for storing clean water, and the flush toilet is detected by the detection means. When the amount of water is less than a predetermined amount, the clean water stored in the clean water tank is replenished to the toilet bowl or the drain pipe by the clean water replenishment route at the time of cleaning the toilet bowl. At the time of cleaning the toilet bowl, the type toilet bowl supplies the clean water stored in the clean water tank onto the bowl surface of the toilet bowl until the water level of the clean water tank reaches the dead water level. When the amount of water detected by the detection means is less than a predetermined amount, the clean water below the dead water level stored in the clean water tank is sent to the toilet or the drain pipe at the time of cleaning the toilet. It is a water-washing toilet that is designed to be replenished.

According to the present invention, when the amount of water in the rainwater storage tank is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank is replenished to the toilet bowl or the drain pipe when the toilet bowl is washed. As a result, rainwater can be effectively used and water resources can be effectively used. When the amount of water in the rainwater storage tank is less than a predetermined amount, the clean water is replenished to the toilet bowl or the drainage pipe by the clean water replenishment route without passing through the rainwater storage tank at the time of cleaning the toilet bowl. By adopting such a configuration, it is possible to effectively suppress the occurrence of problems when there is a shortage of rainwater, but since it is not necessary to move water between the two tanks, the structure becomes complicated and the structure becomes large. It can be avoided. Further, it becomes easy to arrange the rainwater storage tank at a position away from the toilet bowl. Further, according to the present invention, it is not necessary to complicate the structure of the rainwater storage tank, and it is not necessary to lengthen the clean water replenishment route. According to the present invention , the clean water until the water level of the clean water tank reaches the dead water level is used as the washing water of the bowl surface, and the clean water below the dead water level of the clean water tank is used when the rainwater is insufficient. Since it can be used for replenishment, it is possible to avoid increasing the size of the water supply tank.

Further, in this case, preferably, the clean water tank is separate from the rainwater storage tank.

According to this, since the rainwater storage tank can be arranged in a place different from the clean water tank, it is possible to avoid increasing the size of the tank and effectively utilize the space of the toilet room.

Alternatively, the tap water replenishment route is adapted to replenish the drainage pipe with tap water supplied by direct pressure from the water supply.

According to this, it is not necessary to complicate the structure of the stormwater storage tank, and it is not necessary to lengthen the clean water replenishment route. Moreover, there is no need to provide a new tank to make up for the shortage of rainwater.

According to the present invention, when the amount of water in the rainwater storage tank is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank is replenished to the drain pipe without going through the toilet bowl when cleaning the toilet bowl. As a result, rainwater can be effectively used and water resources can be effectively used. When the amount of water in the rainwater storage tank is less than a predetermined amount, the clean water is replenished to the drain pipe without passing through the rainwater storage tank by the clean water replenishment route when cleaning the toilet bowl. .. By adopting such a configuration, it is possible to effectively suppress the occurrence of problems when there is a shortage of rainwater, but since it is not necessary to move water between the two tanks, the structure becomes complicated and the structure becomes large. It can be avoided. Further, it becomes easy to arrange the rainwater storage tank at a position away from the toilet bowl.

It is the schematic sectional drawing of the flush type toilet bowl by 1st Embodiment of this invention. It is a time chart which shows an example of the opening and closing operation of the drain valve and the three-way valve of the flush toilet of FIG. It is a time chart explaining another example of the opening / closing operation of the drain valve and the three-way valve of the flush toilet of FIG. It is the schematic sectional drawing of the flush toilet according to the 2nd Embodiment of this invention.

Next, a flush toilet according to the embodiment of the present invention will be described with reference to the accompanying drawings. In the present embodiment, a flush toilet is illustrated as a flush toilet, but the present invention is also applicable to a flush toilet.

FIG. 1 is a schematic cross-sectional view of a flush toilet according to the first embodiment of the present invention, and FIG. 2 is a time chart showing an example of opening and closing operations of the drain valve and the three-way valve of the flush toilet of FIG. be.

As shown in FIG. 1, the flush toilet 1 of the first embodiment includes a toilet 2 having a flush water supply path 2s, a spout 2a, a bowl surface 2b, and a trap drainage channel 2c, and a trap drainage channel of the toilet bowl 2. It is provided with a drain pipe 3 which is connected to 2c and discharges filth from the toilet bowl 2.

Further, the flush toilet 1 of the first embodiment includes a rainwater storage tank 11 for storing rainwater and a water amount detection sensor 12 for detecting the amount of water in the rainwater storage tank 11. The rainwater storage tank 11 is usually installed outdoors, but may be installed indoors. The water amount detection sensor 12 is, for example, a float sensor that detects the water level in the rainwater storage tank 11, but may be configured by any other water amount detection sensor.

The rainwater storage tank 11 is connected to a rainwater replenishment route 13 that supplies the rainwater stored in the rainwater storage tank 11 to the drainage pipe 3. Specifically, the rainwater replenishment path 13 extends to a three-way valve 14v provided at the upstream end of the drainage urging pump 14 for urging the replenished water. The drainage urging pump 14 is arranged behind the toilet bowl 2 (on the right side in FIG. 1). A common replenishment path 15 extending from the downstream end of the drainage urging pump 14 joins the drainage pipe 3 at the drainage socket 16 provided at the connection portion between the trap drainage channel 2c and the drainage pipe 3. As a result, the rainwater replenishment route 13 replenishes the rainwater stored in the rainwater storage tank 11 to the drainage pipe 3 via the drainage urging pump 14, the common replenishment route 15, and the drainage socket 16.

On the other hand, the flush toilet 1 of the first embodiment includes a clean water tank 21 for storing clean water, and the clean water tank 21 has a drain pipe 3 for draining the clean water stored in the clean water tank 21. A clean water replenishment route 23 for replenishing water is connected. The clean water replenishment path 23 also extends to the three-way valve 14v provided at the upstream end of the drainage urging pump 14. As a result, the clean water replenishment route 23 replenishes the clean water to the drainage pipe 3 via the drainage urging pump 14, the common replenishment route 15, and the drainage socket 16.

Further, the clean water tank 21 is supplied with the clean water stored in the clean water tank 21 via the drain valve 21v to the bowl surface 2b via the wash water supply path 2s and the spout 2a of the toilet bowl 2. The water supply channel 26 is connected. In this specification, the term "supply" is used for toilet bowl washing water, and the term "replenishment" is used for rainwater or clean water for replenishing stormwater shortage, but this is merely for convenience of explanation. Each specific aspect may be the same.

In the example of FIG. 1, the clean water tank 21, the clean water replenishment path 23, the clean water supply path 26, the drainage urging pump 14, and the common replenishment path 15 are housed in a common housing 30.

At the time of cleaning the toilet bowl 2, the drain valve 21v uses the clean water stored in the clean water tank 21 as wash water on the bowl surface 2b of the toilet bowl 2 until the water level of the clean water tank 21 reaches the dead water level. It is designed to be supplied (for example, 3 L for large cleaning and 1.6 L for small cleaning).

As described above, a three-way valve 14v is provided on the upstream side of the drainage urging pump 14 in order to switch the communication state between the rainwater replenishment path 13 and the clean water replenishment path 23 and the common replenishment path 15. The three-way valve 14v is controlled according to the output of the water amount detection sensor 12.

Specifically, as shown in FIG. 2, when the amount of water detected by the water amount detection sensor 12 is equal to or greater than a predetermined amount (when the output is ON), the three-way valve 14v is replenished with clean water when the toilet bowl 2 is washed. The route 23 and the common replenishment route 15 are not communicated with each other, but the rainwater replenishment route 13 and the common replenishment route 15 are communicated with each other. In this case, the flush toilet 1 of the first embodiment is adapted to replenish the drainage pipe 3 with the rainwater stored in the rainwater storage tank 11 (for example, 3 L at the time of large washing and 2 L at the time of small washing).

On the other hand, as shown in FIG. 2, when the amount of water detected by the water amount detection sensor 12 is less than a predetermined amount (when the output is OFF), the three-way valve 14v is common to the rainwater replenishment path 13 when cleaning the toilet bowl 2. The replenishment route 15 is not communicated with the clean water replenishment route 23 and the common replenishment route 15 is communicated with each other. In this case, the flush toilet 1 of the first embodiment is adapted to replenish the drainage pipe 3 with the clean water stored in the clean water tank 21 (for example, 3 L at the time of large wash and 2 L at the time of small wash). ..

As shown in FIG. 2, the timing at which the three-way valve 14v is opened with respect to any of the replenishment flow paths 13 and 23 is a timing delayed by Δt after the drain valve 21v is opened. By positively adopting such a delay, the timing of replenishing the water from the common replenishment path 15 to the drainage pipe 3 is set to the drainage timing of the clean water (washing water) supplied onto the bowl surface 2b of the toilet bowl 2. Can be adapted to.

According to the present embodiment as described above, when the amount of water in the rainwater storage tank 11 is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank 11 is replenished to the drainage pipe 3 when the toilet bowl 2 is washed. .. As a result, rainwater can be effectively used and water resources can be effectively used.

Then, according to the present embodiment, when the amount of water in the rainwater storage tank 11 is less than a predetermined amount, the clean water stored in the clean water tank 21 by the clean water replenishment route 23 is drained when the toilet bowl 2 is washed. 3 is replenished (without going through the rainwater storage tank 11). As a result, while it is possible to effectively suppress the occurrence of problems when there is a shortage of rainwater, it is not necessary to move water between the two tanks as in the prior art, so that the structure is not complicated and the structure is not complicated. It does not become large. Further, it is easy to arrange the rainwater storage tank 11 at a position away from the toilet bowl 2.

In this embodiment, only the clean water below the dead water level of the clean water tank 21 may be used to replenish the drainage when the rainwater is insufficient. That is, when the amount of water in the rainwater storage tank 11 is less than a predetermined amount, when the toilet bowl 2 is washed, the water level of the clean water tank 21 reaches the dead water level and the drain valve 21v is closed, and then the clean water replenishment flow. The three-way valve 14v may be opened with respect to the road 23. In this case, the clean water until the water level of the clean water tank 21 reaches the dead water level is used as the washing water of the bowl surface 2b, and the clean water below the dead water level of the clean water tank 21 is used when the rainwater is insufficient. Since it can be used for replenishing wastewater, it is possible to avoid increasing the size of the water supply tank 21. FIG. 3 is a time chart showing an example of the opening / closing operation of the drain valve and the three-way valve in this case.

Next, in the cleaning type toilet bowl 1 of the first embodiment, the replenishment with tap water is performed by the tap water stored in the tap water tank 21, but the replenishment with tap water is supplied by direct pressure from the tap water. It may be done by tap water. The flush toilet 101 of the second embodiment is shown in FIG. As shown in FIG. 4, in the flush toilet 101 of the second embodiment, the water supply replenishment route 123 for supplying the water supply to the drainage pipe 3 is connected to the water supply 121.

In the flush toilet 101 of the second embodiment, other configurations are substantially the same as those of the flush toilet 1 of the first embodiment described with reference to FIGS. 1 and 2. In FIG. 4, the same components as those of the flush toilet bowl 1 of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

Even with the flush toilet 101 of the second embodiment, when the amount of water in the rainwater storage tank 11 is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank 11 is replenished to the drain pipe 3 when the toilet bowl 2 is washed. Will be done. As a result, rainwater can be effectively used and water resources can be effectively used.

Then, according to the flush toilet 101 of the second embodiment, when the amount of water in the rainwater storage tank 11 is less than a predetermined amount, the clean water supplied by the direct pressure from the tap water is increased when the toilet 2 is washed. The drain pipe 3 is replenished by the water replenishment route 23 (without passing through the rainwater storage tank 11). As a result, while it is possible to effectively suppress the occurrence of problems when there is a shortage of rainwater, it is not necessary to move water between the two tanks as in the prior art, so that the structure is not complicated and the structure is not complicated. It does not become large. Further, it is easy to arrange the rainwater storage tank 11 at a position away from the toilet bowl 2.

Also in the flush toilet 101 of the second embodiment, when the toilet 2 is washed, the drain valve 21v changes the clean water stored in the clean water tank 21 to the dead water level of the clean water tank 21. Until it reaches, it is supplied onto the bowl surface 2b of the toilet bowl 2. That is, in the present embodiment, the clean water until the water level of the clean water tank 21 reaches the dead water level is used as the washing water of the bowl surface 2b, and the clean water supplied by the direct pressure from the tap water is used when the rainwater is insufficient. It can be used to replenish the wastewater of.

Further, although not shown, instead of supplying the clean water stored in the clean water tank 21 onto the bowl surface 2b of the toilet bowl 2, the clean water supplied by direct pressure from the water supply is supplied to the bowl surface 2b of the toilet bowl 2. It may be fed upwards (such flush toilets are called direct pressure flush toilets).

Further, in the cleaning type toilet bowls 1 and 101 of the first and second embodiments, the common replenishment path 15 after merging at the three-way valve 14v is connected to the drainage pipe 3 at the drainage socket 16. Instead of or in addition to this, the common replenishment route after the rainwater replenishment route 13 and the clean water replenishment route 23 are merged by the three-way valve in substantially the same manner is the flush water supply route 2a of the toilet bowl 2, the toilet bowl. It may be connected to the bowl surface 2b of 2 and / or the trap drainage channel 2c of the toilet bowl 2.

Further, the rainwater replenishment path 13 and the clean water replenishment path 23 are not merged by the three-way valve, but are located at different positions (for example, via an on-off valve that is controlled to open and close according to the output of the water amount detection sensor 12, etc.). The drainage pipe 3 (for example, the drainage socket 16), the wash water supply path 2a of the toilet bowl 2, the bowl surface 2b of the toilet bowl 2, the trap drainage channel 2c of the toilet bowl 2, etc. may be arranged so as to replenish the drainage.

1 Flush toilet 2 Toilet 2s Rinse water supply path 2a Spout 2b Bowl surface 2c Trap drainage channel 3 Drainage pipe 11 Rainwater storage tank 12 Water volume detection sensor 13 Rainwater replenishment route 14 Drainage urging pump 14v Three-way valve 15 Common replenishment route 16 Drain socket 21 Water tank 21v Drain valve 23 Water replenishment route 26 Water supply route 30 Housing 101 Flush toilet 121 Water supply 123 Water replenishment route

Claims (5)

Toilet bowl with bowl surface and
A drainage pipe that is connected to the toilet bowl and discharges filth from the toilet bowl,
A rainwater storage tank that stores rainwater and
A detection means for detecting the amount of water in the rainwater storage tank and
A rainwater replenishment route that is connected to the rainwater storage tank and replenishes the rainwater stored in the rainwater storage tank to the drainage pipe without going through the toilet bowl.
A clean water replenishment route for replenishing clean water to the drainage pipe without going through the toilet bowl,
It is a flush toilet equipped with
The flush toilet is
When the amount of water detected by the detection means is equal to or more than a predetermined amount, the rainwater stored in the rainwater storage tank is replenished to the drainage pipe by the rainwater replenishment route at the time of cleaning the toilet bowl. ,
When the amount of water detected by the detection means is less than a predetermined amount, the drainage pipe is replenished with clean water by the clean water replenishment route at the time of washing the toilet bowl. Flush toilet. The clean water replenishment route is connected to a clean water tank that stores clean water.
The flush toilet is
When the amount of water detected by the detection means is less than a predetermined amount, the clean water stored in the clean water tank is replenished to the drain pipe by the clean water replenishment route at the time of cleaning the toilet bowl. The flush toilet according to claim 1, wherein the toilet bowl is made of water. Toilet bowl with bowl surface and
A drainage pipe that is connected to the toilet bowl and discharges filth from the toilet bowl,
A rainwater storage tank that stores rainwater and
A detection means for detecting the amount of water in the rainwater storage tank and
A rainwater replenishment route that is connected to the rainwater storage tank and replenishes the rainwater stored in the rainwater storage tank to the toilet bowl or the drainage pipe.
A clean water replenishment route for replenishing clean water to the toilet bowl or the drainage pipe,
It is a flush toilet equipped with
The flush toilet is
When the amount of water detected by the detection means is equal to or greater than a predetermined amount, the rainwater stored in the rainwater storage tank by the rainwater replenishment route is replenished to the toilet bowl or the drainage pipe at the time of cleaning the toilet bowl. It has become
When the amount of water detected by the detection means is less than a predetermined amount, the toilet bowl or the drainage pipe is replenished with clean water by the clean water replenishment route at the time of cleaning the toilet bowl.
The clean water replenishment route is connected to a clean water tank that stores clean water.
The flush toilet is
When the amount of water detected by the detection means is less than a predetermined amount, the clean water stored in the clean water tank is replenished to the toilet bowl or the drain pipe by the clean water replenishment route at the time of cleaning the toilet bowl. And
The flush toilet is
At the time of cleaning the toilet bowl, the clean water stored in the clean water tank is supplied onto the bowl surface of the toilet bowl until the water level of the clean water tank reaches the dead water level.
When the amount of water detected by the detection means is less than a predetermined amount, the toilet bowl or the drainage pipe is replenished with clean water below the dead water level stored in the clean water tank at the time of cleaning the toilet bowl. A flush toilet that is characterized by being The flush toilet according to claim 2 or 3, wherein the clean water tank is a separate body from the rainwater storage tank. The flush toilet according to claim 1, wherein the tap water replenishment route is adapted to replenish the drainage pipe with tap water supplied by direct pressure from the water supply.

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