JP2022026671A - Water closet device - Google Patents

Abstract

To provide a water closet device capable of securing a sufficient washing water amount to a toilet bowl body by a miniaturized water storage tank even in a site where a large amount of washing water is required.SOLUTION: A water storage tank includes a jet pump unit for supplying washing water to a toilet bowl body. The jet pump unit includes a throat pipe 38 which has a riser pipe 38a extending obliquely upward from a suction port 38c, a jet nozzle 40 which injects the washing water toward the suction port 38c of the throat pipe 38 and induces jet pump action, and a water supply valve which supplies and stops supplying the washing water from a water supply source to the jet nozzle. An air introduction device 88 for delivering air in the water storage tank into the riser pipe from an air discharge port 94f thereof at a prescribed water level is provided in the riser pipe 38a of the throat pipe 38. A spacer 94 for accelerating the flow velocity of the washing water is formed in the vicinity of the air discharge port 94f of the air introduction device.SELECTED DRAWING: Figure 8

Description

The present invention relates to a flush toilet device, and more particularly to a flush toilet device that supplies cleaning water to a toilet body by a jet pump action to perform cleaning.

Conventionally, as described in Patent Document 1 and Patent Document 2, for example, a flush toilet device in which a jet pump unit is used to continuously supply a large flow rate of wash water to the toilet body has been known. ing.

In such a conventional water-washing toilet device, a water supply valve is provided in a water supply channel directly connected to a water supply source such as a water pipe, and the water supply valve is provided with a float that moves up and down according to the water level in the water storage tank. ing. Then, the water supply / stop to the jet nozzle is performed by opening or closing the water supply valve according to the operation of the float. This jet nozzle induces a jet pump action to discharge washing water, and draws the water in the water storage tank into the throat pipe, so that a large flow rate of washing water can be continuously supplied to the toilet bowl body.

Further, in the conventional flush toilet device described in Patent Document 1 and Patent Document 2, an air introduction pipe for introducing air into the throat pipe is provided at the stage when the water level in the water storage tank drops to a predetermined water level. ing. When air is introduced by this air introduction pipe, the jet pump action is weakened, so that it becomes difficult for water in the water storage tank to be drawn into the throat pipe. That is, the rate at which the water level in the water storage tank drops slows down. As a result, the period in which the water supply valve is open is extended, so that the amount of washing water supplied from the jet nozzle increases. Therefore, even in a flush toilet equipped with a small water storage tank in which the amount of wash water stored in the water storage tank is small, it is possible to secure a sufficient amount of wash water for the toilet bowl body.

Further, in these conventional flush toilet devices, the air introduction amount is adjusted by changing the flow path cross-sectional area of the air introduction pipe that introduces air into the throat pipe (that is, the larger the flow path cross-sectional area, the more air. By increasing the amount of introduction and the amount of washing water supplied from the jet nozzle), the required amount of washing water is secured.

Japanese Unexamined Patent Publication No. 2015-36485 JP-A-2015-203287

Even in the flush toilet device described in Patent Document 1 and Patent Document 2, if the piping that can convey filth with a small amount of washing water (for example, about 4.8 liters or 6 liters) is short, the water storage tank It was possible to secure a sufficient amount of washing water for the toilet bowl body while downsizing the size. However, in a site where a large amount of washing water (for example, about 8 liters) is required to convey filth, the amount of introduced air depends on the flow velocity of the washing water ejected from the jet nozzle. Even if the cross-sectional area of the flow path of the introduction pipe is increased, there is a limit to them. Therefore, it is not possible to secure a sufficient amount of washing water in the miniaturized water storage tank, and the water storage tank must be enlarged. There was a problem that it wasn't there.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and even in a field where a large amount of washing water is required, a miniaturized water storage tank is used to sufficiently wash the toilet bowl body. The purpose is to provide a flush toilet that can secure the amount of water.

In order to achieve the above object, the present invention is to guide the washing water to the bowl portion that receives the filth and the bowl portion in the water washing toilet device that supplies the washing water to the toilet bowl body by the jet pump action to wash the toilet bowl. A toilet body equipped with a headrace, a water storage tank that stores the wash water supplied to the toilet body, and at least a part of it is arranged in a state of being submerged in the water storage tank, and the wash water in the water storage tank is stored in the toilet bowl. It has a jet pump unit that supplies water to the main body, and the jet pump unit has a throat tube having an ascending officer extending upward from a suction port formed below the jet pump unit, and washing water toward the suction port of this throat tube. It has a jet nozzle that induces a jet pump action by injecting water, and a water supply valve that supplies and stops the supply of wash water from the water supply source to the jet nozzle. An air introduction section for discharging the air in the water storage tank from the air discharge port into the riser pipe is provided, and further, a flow velocity accelerating means for accelerating the flow velocity of the washing water is formed in the vicinity of the air discharge port of the air introduction section. Has been done.
In the present invention configured as described above, the rising pipe of the throat pipe is provided with an air introduction portion for discharging the air in the water storage tank from the air discharge port into the rising pipe at a predetermined water level, and further, this air. Since a flow velocity accelerating means for accelerating the flow velocity of the washing water is formed in the vicinity of the air discharge port of the introduction portion, the flow velocity around the air discharge port of the air introduction portion can be increased, and the negative pressure generated by this can be increased. Can be increased. As a result, according to the present invention, the amount of air introduced into the riser pipe by the air introduction portion increases, and cleaning for a long time can be achieved by that amount. Further, since the flow velocity and the flow rate of the washing water required for transporting the filth in the toilet bowl body can be continuously supplied during the latter half of the cleaning period, the filth transportability can be improved.

In the present invention, preferably, the flow velocity accelerating means is configured to increase the flow velocity of the washing water flowing from the center of the throat pipe to the side opposite to the air discharge port of the air introduction portion.
In the present invention configured as described above, since the flow velocity accelerating means is configured to increase the flow velocity of the washing water flowing from the center of the throat pipe to the side opposite to the air discharge port of the air introduction portion, the flow velocity acceleration is performed. It is possible to prevent the wash water accelerated by the means from colliding with the air introduced into the ascending officer by the air introduction unit. Thereby, according to the present invention, it is possible to effectively utilize the suction force increased by increasing the flow velocity of the washing water to increase the amount of air introduced.

In the present invention, the fluid accelerating means is preferably an in-pipe protrusion that projects inside the throat tube to reduce the inner diameter of the throat tube.
In the present invention configured as described above, since the fluid accelerating means is an in-pipe protrusion that protrudes inside the throat pipe to reduce the inner diameter of the throat pipe, the washing water flowing in the vicinity of the in-pipe protrusion is used. The flow velocity can be increased. As a result, according to the present invention, since the flow velocity in the upstream region near the protrusion in the pipe hardly changes, the amount of air sucked in can be increased without affecting the amount of lavage water entrained in the water storage tank. can.

In the present invention, the in-pipe protrusion preferably includes a wall surface formed on the upstream side of the air discharge port of the air introduction portion of the throat pipe.
In the present invention configured as described above, since the in-pipe protrusion has a wall surface formed on the upstream side of the air discharge port of the air introduction portion of the throat pipe, the wall surface of the in-pipe protrusion causes the inside of the ascending pipe. It is possible to prevent the flow of air introduced into the vehicle from colliding with the flow of wash water. Thereby, according to the present invention, the suction force (negative pressure) increased by increasing the flow velocity of the washing water can be effectively used.

In the present invention, an inclined surface is preferably formed at the inner diameter side end of the wall surface so that the inner diameter of the throat pipe is reduced from the suction port toward the air discharge port of the air introduction portion.
In the present invention configured as described above, an inclined surface is formed at the inner diameter side end of the wall surface so that the inner diameter of the throat pipe is reduced from the suction port to the air discharge port of the air introduction portion. , Washing water flows along this slope. Thereby, according to the present invention, the maximum flow velocity portion can be formed in the vicinity of the air discharge port of the air introduction portion, and air can be efficiently introduced into the throat pipe from the air introduction portion.

In the present invention, an air introduction portion is preferably formed inside the space formed by the wall surface.
In the present invention configured as described above, since the air introduction portion is formed inside the space formed by the wall surface, the suction force (negative pressure) generated by the flow of the washing water accelerated in the reduced diameter portion is applied. It can be used effectively before the suction power decreases.

According to the flush toilet device according to the present invention, even in a field where a large amount of wash water is required, it is possible to secure a sufficient amount of wash water for the toilet bowl body by the miniaturized water storage tank.

It is a top view which shows the flush toilet device by one Embodiment of this invention. It is sectional drawing seen along the line II-II of FIG. It is schematic cross-sectional view which shows the internal structure of the washing water tank apparatus for demonstrating the jet pump operation of the jet pump unit used for the flush toilet bowl apparatus by one Embodiment of this invention. It is sectional drawing which shows the internal structure of the washing water tank device of the washing water urinal device by one Embodiment of this invention, and the cross section of the flow path in a jet pump unit. It is a component development drawing which expands and shows the throat pipe of the jet pump unit of the water-washing toilet apparatus by one Embodiment of this invention, and the parts of the air introduction apparatus attached to this throat pipe. It is sectional drawing of the spacer seen along the VI-VI line of FIG. It is a perspective view of the jet pump unit which shows the mounting position of the air introduction device in the case where the jet pump unit of the water washing urinal device by one Embodiment of this invention supplies 8.0 liters of washing water. It is a side sectional view of FIG. A perspective view of the jet pump unit indicating the mounting position of the air introduction device when the jet pump unit of the flush toilet device according to the embodiment of the present invention supplies wash water of 4.6 liters / minute and 6.0 liters / minute. It is a figure. It is a side sectional view of FIG. It is sectional drawing of the throat pipe which shows the state of the flow of the washing water in the throat pipe when the jet pump unit of the water washing urinal apparatus by one Embodiment of this invention supplies 8.0 liters of washing water. A throat tube showing the flow of wash water in the throat tube when the jet pump unit of the flush toilet device according to the embodiment of the present invention supplies wash water of 4.8 liters / minute and 6.0 liters / minute. It is a cross-sectional view of. It is a graph which shows the relationship between the instantaneous flow rate and time of the washing water supplied to the toilet body by the jet pump unit of the water washing toilet apparatus according to one Embodiment of this invention. It is a partial cross-sectional view which shows the jet pump unit of the flush-toilet bowl apparatus by the modification of embodiment of this invention.

Hereinafter, the flush toilet device according to the embodiment of the present invention will be described with reference to the accompanying drawings.
First, the basic structure of the flush toilet bowl device according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing a flush toilet device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

As shown in FIGS. 1 and 2, the flush toilet device 1 according to the embodiment of the present invention includes a toilet body 2 and a wash water tank device 4 for supplying wash water to the toilet body 2.
The toilet body 2 includes a bowl portion 6 provided on the front side thereof, a rim portion 8 formed on the upper edge of the bowl portion 6, and a shelf portion 10 formed on the inner circumference of the rim portion 8. ing.
Further, an inlet 12a of the trap drainage channel 12 is opened at the bottom of the bowl portion 6 of the toilet bowl body 2, and the trap drainage channel 12 includes a trap rising pipe 12b extending upward and a trap descending pipe 12c extending downward. ing. As can be seen from the shape of the trap drainage channel 12, the flush toilet device 1 according to the present embodiment is a wash-off type toilet that discharges filth by a drop in the height direction.
The present invention can be applied to other flush toilets such as siphon toilets in addition to the wash-off toilets described above.

Next, the toilet body 2 has a headrace 16 into which the wash water discharged from the drain port 14 of the wash water tank device 4 flows in, and a first rim spout port formed in the center on the left side when viewed from the front of the shelf portion 10. It is provided with 18 and a second rim spout 20 formed on the right rear side when viewed from the front.
Further, the headrace 16 branches downstream into the first headrace 22 and the second headrace 24, and the wash water of the headrace 16 reaches the first rim spout 18 via the first headrace 22. , The second rim spout 20 is reached through the second water passage 24, and the washing water is spouted from the first rim spout 18 and the second rim spout 20, respectively, to wash the bowl portion 6 and remove filth. It is designed to be discharged from the trap drainage channel 12.

Next, the washing water tank device 4 will be described in detail with reference to FIGS. 3 and 4.
FIG. 3 is a cross-sectional view showing the internal structure of the washing water tank device for explaining the jet pump operation of the jet pump unit used in the washing urinal device according to the embodiment of the present invention, and FIG. 4 is a cross-sectional view showing the internal structure of the washing water tank device. It is sectional drawing which shows the internal structure of the washing water tank device of the washing water urinal device by one Embodiment, and the cross section of the flow path in a jet pump unit.
Note that FIG. 4 corresponds to the internal structure of the flush toilet according to the embodiment of the present invention, while FIG. 3 is for explaining the jet pump operation by the jet pump unit, and is one with the internal structure of FIG. It shows a different structure.

As shown in FIGS. 3 and 4, the washing water tank device 4 has a water storage tank 26 formed in a flat shape long in the left-right direction in a plan view to store washing water, and a water supply source such as a water pipe (not shown). ) Is provided with a water supply pipe 28 on the primary side for supplying the washing water supplied from the water storage tank 26 to the water storage tank 26.
Further, the wash water tank device 4 includes a jet pump unit 32 including a water supply valve device 30 connected to the upper end (downstream side end portion) of the water supply pipe 28 to supply and stop the wash water supplied from the water supply pipe 28. It is equipped with a manual lever 34 (see FIG. 3) for the user to manually supply wash water.
Further, a water stop valve 35 (see FIG. 3) is provided at the lower end (upstream end) of the water supply pipe 28. The water stop valve 35 is for stopping water supply from a water supply source (not shown) when the flush toilet device 1 is installed, and is kept in an open state during normal use.

Further, the jet pump unit 32 includes a water supply pipe 36 on the secondary side through which water supplied from the water supply valve device 30 flows, a throat pipe 38 arranged on the downstream side of the water supply pipe 36, and a downstream side of the water supply pipe 36. Inside the throat tube 38, the jet nozzle 40, which is connected to the end and injects wash water toward the throat tube 38 to induce a jet pump action, and the flow path direction in which the wash water injected from the jet nozzle 40 travels. It is provided with a flow path switching valve device 42 for switching from a flow path directed in a direction to a flow path directed in an outward direction of the throat pipe 38.

A constant flow valve 43 (see FIG. 3) is provided between the water supply pipe 28 on the primary side and the water supply valve device 30 to make the washing water supplied to the water supply valve device 30 a constant flow rate.
Further, a vacuum break valve 44 (see FIG. 3) is provided between the water supply pipe 36 on the secondary side and the water supply valve device 30, and the vacuum break valve 44 sucks air from the outside. The purpose is to prevent negative pressure from being generated in the flow path of the water supply pipe 36 up to the jet nozzle 40.

Further, as shown in FIG. 3, the water supply valve device 30 mainly has a main valve body 48 which is a pilot type diaphragm valve, a main toilet seat 50 on which the main valve body 48 is seated, and a main valve body 48 due to internal pressure. It is provided with a pressure chamber 52 that moves with respect to the toilet seat 50, and switches between a water stop state in which the main valve body 48 sits on the main toilet seat 50 and stops water, and a water supply state in which water is supplied away from the main toilet seat 50. It has become.
As shown in FIG. 3, in the pressure chamber 52, the first hole 54 and the second hole 56 for releasing the pressure of the pressure chamber 52, and the first hole 56 in conjunction with the manual operation of the user in the manual lever 34 described above are first performed. A first pilot valve 58 that opens a hole 54, a water supply float 60 that moves up and down according to the water level of the washing water in the water storage tank 26, and a second pilot valve that opens and closes the second hole 56 by the vertical movement of the water supply float 60. 62 and are provided.

Further, as shown in FIG. 3, the main valve body 48 is provided with a bleed hole (not shown), and when the water is stopped, the bleed hole provides a primary side flow path A and a pressure chamber of the water supply pipe 28. It is designed to communicate with the inside of 52. Here, the opening area of the first hole 54 is formed to be larger than the opening area of the second hole 56. Further, the first hole 54 is formed at a position above the second hole 56.

In the water supply valve device 30, in the water stop state, both the first hole 54 and the second hole 56 are closed, and the primary side flow path A of the water supply pipe 28 communicates with the pressure chamber 52 through the bleed hole. Therefore, the water pressures of the temporary side flow path A and the pressure chamber 52 are the same (temporary side flow path pressure α). Further, since the secondary side flow path B is released to the atmosphere and the area where the water pressure acts on the main valve body 48 is larger than the area of the primary side flow path A, the main valve body 48 is pressed against the main toilet seat 50. It is designed to close the valve.

In the water supply valve device 30, when the first hole 54 and / or the second hole 56 is opened by the first pilot valve 58 and / or the second pilot valve 62, the washing water flows out from the pressure chamber 52 and the pressure chamber The pressure in the 52 is reduced, the main valve body 48 moves away from the main toilet seat 50, the valve is opened, and the water is discharged.

In the water supply valve device 30, when the first hole 54 and the second hole 56 are closed by the first pilot valve 58 and the second pilot valve 62, the pressure in the pressure chamber 52 becomes the primary side flow path pressure α again, and the main valve body. 48 moves toward the main toilet seat 50 and finally becomes a closed valve state (water stop state).
At this time, since the washing water of the primary side flow path A is gradually injected into the pressure chamber 52 from the bleed hole, the main hole 54 and the second hole 56 are closed with a delay of a predetermined time. The valve body 48 is in a closed state (water stop state).

Next, the throat pipe 38 of the jet pump unit 32 includes an ascending pipe 38a extending diagonally upward from below and a descending pipe 38b extending downward from the vicinity of the upper end of the ascending pipe 38a, and has a substantially inverted V shape. It is formed.
Further, an air introduction device 80, which will be described in detail later, is connected to the rising pipe 38a of the throat pipe 38. The air introduction device 80 introduces the air in the water storage tank 26 into the riser pipe 38a.

A suction port 38c is formed at the upstream end (inlet portion) of the rising pipe 38a of the throat pipe 38, and the suction port 38c is located at the lower part in the water storage tank 26.
Further, the outlet portion 38d (see FIG. 4) of the descending pipe 38b of the throat pipe 38 is connected to the drainage port 14 communicating with the headrace 16 of the toilet bowl main body 2.
Further, the jet nozzle 40 is arranged so as to face the suction port 38c of the throat pipe 38, and the suction port 38c and the jet nozzle 40 of the throat pipe 38 are always submerged in the water storage tank 26.

Next, the flow path switching valve device 42 of the jet pump unit 32 throat pipes in the flow path direction in which the washing water jetted from the jet nozzle 40 travels when water is supplied to the water storage tank 26 after cleaning the toilet bowl. Depending on the flow path switching valve 66 that switches from the flow path directed toward the inside of 38 to the flow path directed toward the outside of the throat pipe 38 (inside the water storage tank 26), and the water level of the washing water stored in the water storage tank 26. The float 68 that operates the flow path switching valve 66 by moving up and down, the connecting portion 70 that connects the float 68 and the flow path switching valve 66, and the height that connects the float 68 to the connecting portion 70 in the vertical direction. It includes an adjusting mechanism unit 72 for adjusting.

Further, as shown in FIG. 4, the inside of the water supply pipe 36 on the secondary side of the jet pump unit 32 forms a main flow path 74 connecting between the water supply valve device 30 and the jet nozzle 40.
Further, in the water supply pipe 36 on the secondary side of the jet pump unit 32, on the downstream side of the relief valve device 46, a branch path for make-up water that supplies wash water to the toilet bowl main body 2 without passing through the jet nozzle 40 is provided. The branch pipe 76 to be formed is connected. The downstream end of the branch pipe 76 is connected to an overflow pipe 78 which is provided adjacent to the descending pipe 38b of the throat pipe 38 and extends in the vertical direction. The downstream side of the overflow pipe 78 communicates with the headrace 16 of the toilet body 2.

The jet pump unit 32 injects high-speed washing water from the jet nozzle 40 toward the suction port 38c of the throat tube 38 to apply negative pressure to the space near the suction port 38c in the throat tube 38 near the jet nozzle 40. Causes and induces jet pumping action (ejector effect). By this jet pump action, the washing water in the vicinity in the water storage tank 26 is sucked, and the washing water and the washing water ejected from the jet nozzle 40 are combined and flow in the throat pipe 38 to guide the toilet bowl body 2. It is designed to be supplied to the water channel 16.
That is, with respect to the term "jet pumping action" described in the present specification, the flow of a large amount of washing water jetted from the jet nozzle 40 toward the suction port 38c of the throat tube 38 is itself a pump or the like. A negative pressure is formed that directly draws in the surrounding washing water such as in the vicinity of the suction port 38c of the throat tube 38 without depending on other mechanical elements, and this negative pressure is used in the throat tube 38. It means the action of pumping the washing water in the water storage tank 26 sucked into the toilet body 2 side.

Next, as shown in FIG. 4, the water level WL1 in the water storage tank 26 indicates the water level before the cleaning is started, and the water level WL2 indicates the water level when the cleaning is completed.

Next, the air introduction device 80 will be described with reference to FIGS. 5 to 10. FIG. 5 is a component development view showing the throat pipe of the jet pump unit of the water-washing urinal device according to the embodiment of the present invention and the parts of the air introduction device attached to the throat pipe, and FIG. 6 is a component development view showing the components of the air introduction device. It is a cross-sectional view of the spacer seen along the VI-VI line of the present invention, and FIG. 7 is a case where the jet pump unit of the water-washing urinal device according to the embodiment of the present invention supplies washing water of 8.0 liters / minute. It is a perspective view of the jet pump unit which shows the mounting position of an air introduction apparatus, and FIG. 8 is a side sectional view of FIG. 7. FIG. 9 is a jet pump showing the mounting position of the air introduction device when the jet pump unit of the flush toilet device according to the embodiment of the present invention supplies wash water of 4.8 liters / minute and 6.0 liters / minute. It is a perspective view of a unit, and FIG. 10 is a side sectional view of FIG.

First, as shown in FIG. 5, a mounting member 82 for mounting the air introduction device 80 is provided on the upper surface of the rising pipe 38a of the throat pipe 38. An intake port 84 penetrating the mounting member 82 and the rising pipe 38a is formed in the mounting member 82 and the rising pipe 38a, and the air in the water storage tank 26 can be introduced into the throat pipe 38 by the intake port 84. It has become like.

The air introduction device 80 includes a base member 86, and a first air introduction portion 88 and a second air introduction portion 90 are formed on the base member 86.
Here, the base member 86 of the air introduction device 80 moves in the vertical direction along the mounting member 82, that is, along the upper surface of the riser pipe 38a, and moves upward to the first position (see FIG. 8) and downward. It is fixed at two positions of the second position (see FIG. 10).
When the air introduction device 80 is located in the first position, the first air introduction unit 88 supplies the washing water of 8.0 liters / minute by the jet pump unit 32, and when the air introduction device 80 is located in the second position, the second position is reached. The air introduction unit 90 supplies 4.8 liters / minute or 6.0 liters / minute of wash water.

When the base member 86 of the air introduction device 80 is fixed at the upper first position, water is stored in the rising pipe 38a of the throat pipe 38 by the first air introduction portion 88 as shown in FIGS. 7 and 8. The air in the tank 26 is introduced.
On the other hand, when the base member 86 of the air introduction device 80 is fixed at the lower second position, as shown in FIGS. 9 and 10, the second air introduction portion 90 causes the inside of the riser pipe 38a of the throat pipe 38. The air in the water storage tank 26 is introduced into the water storage tank 26.

More specifically, the first air introduction unit 88 will be described with reference to FIGS. 5 to 8 on the lower side (rising pipe 38a) of the base member 86 so that the first air introduction unit 88 communicates with the above-mentioned intake port 84. Two mounting plate members 92 formed on the upper surface of (upstream side), and a spacer 94 inserted between these mounting plate members 92 and inserted into the riser pipe 38a via the intake port 84. Is formed by. Engagement openings 92a are formed in each of the two mounting plate members 92 (see FIG. 5).

The spacer 94 includes two plate members 94a, a connection plate 94b connecting these two plate members 94a at an intermediate position in the substantially longitudinal direction thereof, and an inner diameter side end portion and an upstream side of the two plate members 94b. The bottom plate 94c connecting the two plate members 94c, the first engaging protrusion 94d (used in the first position) and the outer surface formed on the upper side of the outer surface of the two plate members 94a, as shown in FIGS. 5 and 6. It is provided with a second engaging protrusion 94e (used in the second position) formed in the middle position of the above. Further, as shown in FIG. 8, the downstream side of the two plate members 94a on the inner diameter side is an air discharge port 94f for discharging air into the riser pipe 38a.
Here, as shown in FIG. 8, the bottom plate 94c of the spacer 94 is formed as an inclined surface inclined from the suction port 38c toward the air discharge port 94f.

The connection plate 94b is provided only on the upper side (downstream side) of the two plate members 94a in the width direction. Therefore, the upper side (downstream side) of the two plate members 94a is open except for the connection plate 94b, and the lower side (upstream side) of the two plate members 94a is the bottom plate 94c. Other than the above, the air is opened, which makes it easy for the air in the water storage tank 26 to be introduced from the second air introduction unit 90 into the ascending pipe 38a of the throat pipe 38, as will be described later. In this embodiment, the width direction (vertical direction) of the connection plate 94b is constant, but by adjusting the length in the width direction, it is possible to adjust the water level at which intake starts and the intake amount. Therefore, depending on the required intake air amount, the water level may be adjusted or the intake air amount may be adjusted by omitting the connection plate 94b or replacing parts.
These two plate members 94a, the connecting plate 94b and the bottom plate 94c form the wall surface of the spacer 94.

When the base member 86 of the air introduction device 80 shown in FIG. 8 is located at the upper first position, the spacer 94 is inserted into the mounting plate member 92.
As described above, in the state shown in FIG. 8, the first air introduction unit 88 can introduce the air in the water storage tank 26 into the rising pipe 38a of the throat pipe 38. The WL3 indicates the water level at which the air in the water storage tank 26 is started to be introduced into the riser pipe 38a through the spacer 94 by the first air introduction unit 88.

In this embodiment, the amount of the spacer 94 inserted into the riser pipe 38a is constant, but the amount of insertion may be variable so that the amount of washing water supplied to the toilet bowl body 2 is variable. In this case, when the insertion amount of the spacer 94 is large, the amount of washing water is large, while when the insertion amount is small, the amount of washing water is also small.

Next, in FIGS. 5, 6, 9, and 10, the second air introduction unit 90 will be specifically described. The second air introduction unit 90 includes a cylindrical portion 96 extending in the vertical direction and the cylinder. A lid 98 that closes the upper end opening of the portion 96 is provided. An air introduction hole 100 is formed on the side surface of the cylindrical portion 96. The lid body 98 has a knob portion 98a for rotating the lid body 98, a cylindrical insertion portion 98b extending downward from the lid body 98 in the cylindrical portion 96, and a notch 98c formed in the insertion portion 98b. I have. By rotating the knob portion 98a, the overlapping area between the notch 98c and the air introduction hole 100 can be changed, and the air suction flow rate can be adjusted. In this example, when the overlapping area is small, the air suction flow rate is small, so 4.8 liters of washing water is supplied, and when the overlapping area is large, the air suction flow rate is large, so 6.0 liters is supplied. It is designed to supply wash water. The WL4 shown in FIG. 10 indicates the water level at which the air in the water storage tank 26 is started to be introduced into the rising pipe 38a by the second air introduction unit 90.

In this embodiment, the overlapping area of the air introduction hole 100 and the notch 98c is changed to adjust the intake air amount. However, instead of the notch 98c, a plurality of holes having different sizes are provided and the air introduction hole is provided. The air suction flow rate may be adjusted by aligning the 100 with those holes.

By moving the base member 86 in the vertical direction, the first air introduction section 88 and the second air introduction section 90 are switched, and the rising pipe 38a is switched from either the first air introduction section 88 or the second air introduction section 90. Since the air in the water storage tank 26 is introduced into the water storage tank 26, it is possible to supply various amounts of washing water to the toilet bowl main body 2 according to the construction site even when the same water storage tank 26 is used.

As shown in FIGS. 9 and 10, in the state where the second air introduction portion 90 and the intake port 84 communicate with each other, the base member 86 is located downward (second position) and is attached to the base member 86. It is maintained by the fitting and gravity of the member 82, and the base member 86 is prevented from moving due to the vertical movement of the water level. At this time, by engaging the second engaging projection 94e of the spacer 94 with the engaging opening 92a of the mounting plate member 92, the spacer 94 is attached to the base member 86 so that the spacer 94 does not fall off from the base member 86. It has become. A locking means for fixing the base member 86 and the mounting member 82 to the downward position may be separately provided.

As shown in FIGS. 7 and 8, when a suction flow rate larger than that of the second air introduction portion 90 is required, the base member 86 is slid upward. After the base member 86 of the air introduction device 80 is positioned at the upper first position, the second engaging projection 94e of the spacer 94 and the engaging opening 92a of the mounting plate member 92 are disengaged to disengage the spacer 94. Is inserted into the mounting plate member 92. At this time, the movement of the spacer 94 and the base member 86 is restricted by engaging the first engaging projection 94d formed on the upper side of the plate member 94a with the engaging opening 92a. Therefore, the base member 86 does not move and is held in the first position due to the vertical movement of the water level and gravity. When a large suction flow rate is no longer required, the spacer 94 is pulled out and the first engaging projection 94d of the spacer 94 is disengaged from the engaging opening 92a of the mounting plate member 92, and the spacer 94 is slid downward. The first position and the second position can be switched. That is, since the first air introduction portion 88 is provided below the base member 86 and the second air introduction portion 90 is provided above, it is held by gravity and fitting force (it does not have a locking means with the intake port 84). ) The second position is located below, and a first air introduction section that can be used in combination with the lock mechanism is provided when the second position is located above where it is easy to move due to gravity or changes in the water level.

The first air introduction section 88 and the second air introduction section 90 provided in the base member 86 are provided with the first air introduction section 88 at the upper side and the second air introduction section 90 at the lower side. The air introduction section 90 may be provided above and the first air introduction section 88 may be provided below.

Next, the operation (action) of the flush toilet bowl device according to the above-described embodiment of the present invention will be described with reference to FIGS. 3 to 13. FIG. 11 is a cross-sectional view of the throat pipe showing the flow of the washing water in the throat pipe when the jet pump unit of the flush toilet device according to the embodiment of the present invention supplies 8.0 liters of washing water. FIG. 12 shows the flow of washing water in the throat pipe when the jet pump unit of the water washing toilet device according to the embodiment of the present invention supplies washing water of 4.8 liters / minute and 6.0 liters / minute. FIG. 13 is a cross-sectional view of the throat pipe shown, and FIG. 13 is a graph showing the relationship between the instantaneous flow rate and time of the washing water supplied to the toilet bowl body by the jet pump unit of the washing toilet bowl device according to the embodiment of the present invention. In FIG. 13, A drawn by the alternate long and short dash line indicates the case where the instantaneous flow rate is 4.8 liters / minute, and B drawn by the alternate long and short dash line indicates the case where the instantaneous flow rate is 6.0 liters / minute. , C drawn with a solid line shows the case where the instantaneous flow rate is 8.0 liters / minute.

First, as shown in FIGS. 3 and 4, in the washing water tank device 4 before the start of washing, the water level in the water storage tank 26 is the water level WL1 in the normal state, and in the water supply valve device 30, the first hole 54 and The second holes 56 are all closed, and the main valve body 48 is seated on the main toilet seat 50 and is in a water-stopped state.

When the user manually operates the manual lever 34 to start cleaning, the drive shaft 64 connected to the manual lever 34 rotates, the first pilot valve 58 of the water supply valve device 30 operates, and the first hole 54 opens. At this time, the main valve body 48 of the water supply valve device 30 is separated from the main toilet seat 50 to supply water. As a result, the washing water supplied from the external water supply source reaches the jet nozzle 40 via the water stop valve 35, the constant flow rate valve 43, the water supply valve device 30, and the water supply pipe 36 on the secondary side, and reaches the jet nozzle 40. Washing water is sprayed from the throat pipe 38 toward the suction port 38c. At this time, since the vicinity of the suction port 38c of the throat pipe 38 becomes a negative pressure, the washing water stored in the water storage tank 26 is also sucked into the throat pipe 38, and the washing water supplied from the outside by the washing water tank device 4 And the washing water in the water storage tank 26 flow together in the throat pipe 38, are supplied to the toilet body 2, and the washing of the bowl portion 6 is started (time t0 in FIG. 8). With the start of cleaning, the water level in the water storage tank 26 drops, and the water supply float 60 drops. As soon as the water supply float 60 descends, the second pilot valve 62 operates, which opens the second hole 56. At this time, the first hole 54 was in an open state by operating the manual lever 34, but is closed at the timing when the second hole 56 is opened. The second hole 56 is kept open until the water supply float 60 rises again.

Next, immediately after the supply of wash water from the water supply valve device 30 is started, the water level of the wash water stored in the water storage tank 26 is close to WL1, so that the float 68 of the flow path switching valve device 42 rises. The flow path switching valve 66 is lowered, and the front side of the jet nozzle 40 is open. As a result, the washing water stored in the water storage tank 26 forms a flow toward the suction port 38c of the jet nozzle 40 and the throat pipe 38, and a large flow rate of washing water is supplied to the toilet bowl main body 2 (time in FIG. 13). t1).

When the water level in the water storage tank 26 drops to the water level WL3 shown in FIG. 8 or the water level WL4 shown in FIG. 10 with the lapse of time from the start of the supply of the washing water to the toilet body 2, the throat in which the washing water is flowing is flowing. Air is sucked into the inside of the pipe 38 from the first air introduction part 88 or the second air introduction part 90 of the air introduction device 80 by the negative pressure generated by the flow of water in the rising pipe 38a. As a result, the flow rate (instantaneous flow rate) of the washing water supplied to the toilet bowl main body 2 through the throat pipe 38 is reduced at once (see time t2 in FIG. 13).

This is because the air sucked from the first air introduction section 88 or the second air introduction section 90 into the riser pipe 38a of the throat pipe 38 reduces the area where the wash water flows in the riser pipe 38a, and the flow rate of the wash water becomes smaller. Is suppressed. As described above, when the amount of air sent into the riser pipe 38a increases, the flow rate of the washing water supplied to the toilet bowl main body 2 decreases. As a result, the amount of wash water used in the water storage tank 26 sucked into the throat pipe 38 by the jet nozzle 40 is reduced.
That is, the larger the amount of air sent into the rising pipe 38a, the slower the rate at which the water level in the water storage tank 26 drops, the longer the water supply time, and finally, from the water storage tank 2 to the toilet bowl body 2. The amount of wash water to be supplied can be increased.

When the water level in the water storage tank 26 drops to WL2, the float 68 also drops to the position of the water level WL2 in conjunction with the drop in the water level, and the flow path switching valve 66 rises. As a result, the flow path of the throat pipe 38 is blocked by the flow path switching valve 66, and the washing water injected from the jet nozzle 40 collides with the flow path switching valve 66 and flows without flowing in the throat pipe 38. It is repelled by the path switching valve 66. As a result, the supply of wash water to the toilet bowl body 2 is stopped (see time t3, t4, t5 in FIG. 13).

After that, the washing water jetted from the jet nozzle 40 is switched in the traveling direction toward the outside of the throat pipe 38 by the flow path switching valve 66, and is stored in the water storage tank 26. Then, when the water level of the water storage tank 26 rises and reaches WL1, the water supply float 60 of the water supply valve device 30 also rises to the water level of WL1, and in the water supply valve device 30, the second pilot valve 62 operates and the second hole. 56 is closed. As a result, the pressure in the pressure chamber 52 becomes the primary side flow path pressure α, the main valve body 48 moves toward the main toilet seat 50, and finally the valve is closed (water stop state). The water supply valve device 30 is stopped, water supply is completed, and the cleaning operation is completed.

(New items)
Next, the operation (action) by the air introduction device 80 will be specifically described with reference to FIGS. 11, 12, and 13.
As shown in FIG. 11, when the air in the water storage tank 26 is introduced into the ascending pipe 38a by the first air introducing portion 88, the spacer 94 protrudes into the ascending pipe 38a, so that the ascending pipe 38a A reduced diameter portion 102 is formed in a region in the vicinity of the air discharge port 94f of the spacer 94. The reduced diameter portion 102 reduces the cross-sectional area of the region near the air discharge port 94f of the spacer 94, thereby accelerating the flow velocity of the washing water, and further increasing the flow velocity of the washing water, thereby increasing the flow velocity of the washing water, thereby increasing the flow velocity of the washing water. The negative pressure in the region near 94f increases. As a result, the amount of air introduced by the first air introduction unit 88 (intake entrainment amount) is increased as compared with the case where the spacer 94 is not provided and the diameter is not reduced, and cleaning for a long time can be achieved by that amount (FIG. 13). (See), 8.0 liters of wash water can be supplied to the toilet bowl body 2.

Further, as shown by the solid line C in FIG. 13, when air is introduced by the first air introduction unit 88, the flow velocity and the flow rate of the washing water required for transporting the filth in the toilet bowl main body 2 are set to the second air introduction unit. Compared with the case where air is introduced by 90, it is possible to continuously supply the air even during the latter half of the cleaning period, so that the filth transportability can be improved.

As shown in FIG. 11, in the present embodiment, the spacer 94 of the first air introduction portion 88 is provided so as to project inward from the upper surface of the ascending pipe 38a, so that it is provided from the center of the ascending pipe 38a. The flow velocity of the washing water flowing through the region 38b opposite to the air discharge port 94f of the spacer 94 increases. It is suppressed that the accelerated washing water in the reduced diameter portion 102 collides with the air discharged from the air discharge port 94f of the spacer 94. As a result, the suction force increased by the increase in the flow velocity of the washing water can be effectively utilized to increase the amount of air introduced.

Further, in the present embodiment, since the spacer 94 protrudes inside the throat tube 38 to reduce the inner diameter of the throat tube 38, the flow velocity of the washing water flowing in the vicinity of the spacer 94 can be increased. Since the flow velocity in the upstream region near the spacer 94 hardly changes, the amount of air sucked in can be increased without affecting the amount of wash water entrained in the water storage tank 26.

Further, in the present embodiment, the bottom plate 94c, which is a wall surface, is provided so as to connect the inner diameter side end portion and the upstream side of the two plate members 94b in a state where the spacer 94 is inserted into the riser pipe 38a. Therefore, the bottom plate 94c can prevent the flow of air introduced into the riser pipe 38a from colliding with the flow of wash water. Thereby, according to the present embodiment, the suction force (negative pressure) increased by increasing the flow velocity of the washing water can be effectively used.

Further, in the present embodiment, the bottom plate 94c of the spacer 94 is formed so as to be an inclined surface inclined from the suction port 38c toward the air discharge port 94f, and the washing water flows along the inclined surface. Thereby, according to the present embodiment, the maximum flow velocity portion can be formed in the vicinity of the air discharge port 94f of the spacer 94, and the air can be efficiently introduced into the riser pipe 38c by the first air introduction portion 88. ..

Further, in the present embodiment, since air is introduced by the spacer 94 discharged into the rising pipe 38a, the suction force (negative pressure) generated by the flow of the washing water accelerated by the reduced diameter portion 102 is attracted. Can be used effectively before it drops.

Next, as shown in FIG. 12, when the air in the water storage tank 26 is introduced into the rising pipe 38a by the second air introduction unit 90, the air in the water storage tank 26 is simply introduced from the air introduction port 100. Therefore, the flow velocity in the region of the riser pipe 38a into which the air is introduced is not accelerated. Therefore, the amount of introduced air (intake entrainment amount) is smaller than that in the case where air is introduced by the first air introduction unit 88. As a result, the amount of wash water supplied to the toilet bowl main body 2 is 4.8 liters or 6.0 liters, which is smaller than the 8.0 liters in the case of the first air introduction unit 88.

Next, a modified example of the above-described embodiment will be described with reference to FIG. FIG. 14 is a partial cross-sectional view showing a jet pump unit of a flush toilet bowl device according to a modified example of the embodiment of the present invention.
A modified example of the first air introduction unit 88 described above will be described with reference to FIG. The first air introduction portion 104 includes a spacer 106 provided so as to communicate with the intake port 84 of the riser pipe 38a of the throat pipe 38. The lower ends of the spacer 106 on the upstream side and the downstream side are connected to the riser pipe 38a. The first air introduction portion 104 further includes an in-pipe projecting member 108 projecting into the ascending pipe 38a on the upstream side in the vicinity of the spacer 106 of the ascending pipe 38a. An air discharge port 106a is provided at the position of the intake port 84 of the spacer 106, and the air in the water storage tank 26 is introduced into the rising pipe 38a from the air discharge port 106a.

Also in the modified example of this embodiment, the reduced diameter portion is formed by the in-pipe protruding member 108, and the reduced diameter portion reduces the cross-sectional area of the rising pipe 38a, whereby the flow velocity of the washing water is accelerated, and further. As the flow velocity of the washing water increases, the region near the air discharge port 106a becomes a negative pressure. As a result, the amount of air introduced by the first air introduction unit 104 (intake entrainment amount) is increased as compared with the case where the diameter is not reduced without providing the in-pipe protruding member 108, and cleaning can be achieved for a long time by that amount. Similar to the embodiment, 8.0 liters of wash water can be supplied to the toilet bowl main body 2. In addition, according to this modification, the same effect as that of the above-described embodiment can be obtained. The diameter-reduced portion may be provided so that the cross-sectional area of the rising pipe 38a is generally small. As long as it is on the upstream side in the vicinity where the spacer 106 of the riser pipe 38a is provided, it may be provided on the entire circumference or partially.

1 Washing toilet device 2 Toilet body 4 Washing water tank device 6 Bowl part 16 Headrace 26 Water storage tank 30 Water supply valve device 32 Jet pump unit 38 Throat pipe 38a Rising pipe 38b Opposite area 38c Suction port 40 Jet nozzle 80 Air introduction Device 84 Suction port 86 Base member 88, 104 First air introduction part 90 Second air introduction part 94, 106 Spacer 94a Plate member 94b Connection plate 94c Bottom plate 94f, 106a Air discharge port 96 Cylindrical part 98 Lid 100 Air introduction hole 102 Reduced diameter part

Claims (6)

In a flush toilet device that supplies wash water to the toilet body and cleans it by the action of a jet pump.
A toilet bowl body equipped with a bowl part that receives filth and a headrace for guiding wash water to this bowl part,
A water storage tank that stores the washing water supplied to the toilet bowl,
It has a jet pump unit, which is arranged in a state where at least a part thereof is submerged in the water storage tank and supplies the washing water in the water storage tank to the toilet bowl main body.
The above jet pump unit is
A throat tube with an ascending officer extending upward from the suction port formed below it,
A jet nozzle that injects washing water toward the suction port of this throat tube to induce a jet pump action,
It has a water supply valve that supplies and stops the supply of washing water from the water supply source to the jet nozzle.
The ascending pipe of the throat pipe is provided with an air introduction portion for discharging the air in the water storage tank from the air discharge port into the ascending pipe at a predetermined water level, and further, in the vicinity of the air discharge port of the air introduction portion. A flush urinal device in which a flow velocity accelerating means for accelerating the flow velocity of the wash water is formed. The flush toilet device according to claim 1, wherein the flow velocity accelerating means is configured to increase the flow velocity of the wash water flowing from the center of the throat pipe to the side opposite to the air discharge port of the air introduction portion. The flush toilet device according to claim 1 or 2, wherein the fluid accelerating means is an in-pipe protrusion that protrudes inside the throat tube to reduce the inner diameter of the throat tube. The flush toilet device according to claim 3, wherein the protrusion in the pipe is provided with a wall surface formed on the upstream side of the air discharge port of the air introduction portion of the throat pipe. The water washing according to claim 4, wherein an inclined surface is formed at the inner diameter side end portion of the wall surface so that the inner diameter of the throat pipe is reduced from the suction port toward the air discharge port of the air introduction portion. Toilet bowl device. The flush toilet device according to claim 4 or 5, wherein the air introduction portion is formed inside the space formed by the wall surface.

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