JP7427161B2 - Flush toilet device - Google Patents

Description

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

2. Description of the Related Art Conventionally, as described in Patent Document 1, for example, there has been known a flush toilet device that uses a jet pump unit to continuously supply a large flow of flush water to a toilet main body.

In such conventional flush toilet devices, a water supply valve is provided in a water supply channel that is directly connected to a water supply source such as a water pipe, and this water supply valve is provided with a float that moves up and down according to the water level in the water storage tank. ing. The water supply to the jet nozzle is stopped by opening or closing the water supply valve in accordance with the operation of the float. This jet nozzle can continuously supply a large flow of flushing water to the toilet bowl body by inducing a jet pump action to discharge flushing water and drawing water in the water storage tank into the throat pipe.

Further, the conventional flush toilet device described in Patent Document 1 is provided with an air introduction pipe that introduces air into the throat pipe when the water level in the water storage tank has decreased to a predetermined water level. When air is introduced through the air introduction pipe, the jet pump action is weakened, making it difficult for water in the water storage tank to be drawn into the throat pipe. In other words, the rate at which the water level in the water storage tank decreases becomes slower. This extends the period during which the water supply valve is open, thereby increasing the amount of cleaning water supplied from the jet nozzle. Therefore, even in a flush toilet equipped with a small water storage tank that stores only a small amount of flushing water, it is possible to ensure a sufficient amount of flushing water to the toilet main body.

JP2015-206168

Even in the flush toilet device described in Patent Document 1, if the piping is short and can transport waste with a small amount of flushing water (for example, about 4.8 liters), the water storage tank can be made smaller and transferred to the toilet body. It was possible to secure a sufficient amount of washing water. However, in sites with long pipes that require a large amount of washing water (for example, about 8 liters) to transport waste, a smaller water storage tank cannot secure a sufficient amount of washing water, and the water can be stored. The problem was that the tank had to be made larger.

Therefore, the present invention was made to solve the above-mentioned problems of the conventional technology, and even in sites where a large amount of flushing water is required, it is possible to sufficiently flush the toilet bowl body with a downsized water storage tank. The purpose is to provide a flush toilet that can secure a sufficient amount of water.

In order to achieve the above object, the present invention provides a flush toilet device that supplies flush water to the toilet main body by a jet pump action to clean the toilet body, which comprises a bowl portion for receiving filth, and a bowl portion for supplying flush water to the bowl portion. A toilet main body equipped with a water conduit for guiding the water, a water storage tank for storing the washing water to be supplied to the toilet main body, and a water storage tank arranged with at least a part submerged in the water storage tank, and the washing water in the water storage tank. a jet pump unit that supplies water to the toilet main body, and the jet pump unit has a throat pipe having a rising pipe extending obliquely upward from a suction port formed below the jet pump unit, and a jet pump unit having a throat pipe having a rising pipe extending obliquely upward from a suction port formed below the jet pump unit, and a jet nozzle that injects cleaning water to induce a jet pump action, and a water supply valve that shuts off the supply of cleaning water from a water supply source to the jet nozzle. An air introduction pipe is provided for introducing air in the water storage tank into the riser pipe, and the air introduction pipe is formed so that the cross-sectional area of the flow passage on the upstream side is larger than the cross-sectional area of the flow passage on the downstream side, Furthermore, an air introduction hole for introducing air in the water storage tank is formed on the upstream side of this air introduction pipe.
In the present invention configured as described above, the riser pipe of the throat pipe is provided with an air introduction pipe that introduces the air in the water storage tank into the riser pipe at a predetermined water level, and this air introduction pipe is connected to the flow on the upstream side of the riser pipe. The passage cross-sectional area is formed to be larger than the passage cross-sectional area on the downstream side, and furthermore, an air introduction hole is formed on the upstream side of this air introduction pipe for introducing the air in the water storage tank. Therefore, first, when the water level in the water storage tank drops to a predetermined water level, air is inserted from the air introduction pipe into the riser pipe of the throat pipe, and the flow rate of cleaning water flowing through the riser pipe is reduced by the volume of this air. As a result, the rate of decline of the water level in the water storage tank is slowed down, allowing the jet pump unit to supply flushing water to the toilet bowl body for a correspondingly longer period of time. Furthermore, in the present invention, the air introduction pipe is formed so that the flow path cross-sectional area on the upstream side is larger than the flow path cross-sectional area on the downstream side, so that pressure fluctuations in the air introduced on the upstream side are alleviated and smooth. is introduced into the rising pipe of the throat pipe from the downstream side. As a result, according to the present invention, the water storage tank can be made smaller.

In the present invention, preferably, the air introduction tube has a substantially circular cross section, and the central axis on the upstream side and the central axis on the downstream side of the air introduction tube are coaxially arranged.
In the present invention configured as described above, since the cross section of the air introduction tube is approximately circular, the entire circumference is uniform, and therefore the flow rate of the air introduced from the air introduction hole into the air introduction tube is variable. This makes it difficult for this to occur, thereby making it possible to increase the amount of air introduced into the air introduction pipe. Furthermore, since the central axis on the upstream side and the central axis on the downstream side of the air introduction pipe are arranged coaxially, the air flows smoothly from the upstream side to the downstream side in the air introduction pipe, and as a result, the riser pipe The amount of air introduced into the tank can be increased.

In the present invention, preferably, the cross-sectional area on the upstream side and the cross-sectional area on the downstream side of the air introduction pipe are substantially constant, and a section where the cross-sectional area of the flow path changes is preferably provided between the upstream side and the downstream side. ing.
In the present invention configured in this way, the cross-sectional area on the upstream side and the cross-sectional area on the downstream side of the air introduction pipe are substantially constant, and there is a change in the cross-sectional area of the flow path between the upstream side and the downstream side. Since the portion is provided, the air introduced into the air introduction pipe from the air introduction hole is rectified within the air introduction pipe, and the air can be smoothly supplied into the rising pipe of the throat pipe.

In the present invention, preferably, the portion where the cross-sectional area of the flow path changes has an R shape such that the cross-sectional area thereof becomes smaller.
In the present invention configured in this manner, the section where the cross-sectional area of the flow path changes is formed into an R shape such that the cross-sectional area becomes smaller, so that the air flowing from the upstream side to the downstream side of the air introduction pipe changes. Flows smoothly without stagnation in the parts.

In the present invention, the volume on the upstream side of the air introduction pipe is preferably larger than the volume on the downstream side.
In the present invention configured in this way, since the volume on the upstream side of the air introduction pipe is formed larger than the volume on the downstream side, the upstream side becomes an enlarged space, and the air introduced into the air introduction pipe from the air introduction hole is expanded. Air pressure fluctuations can be alleviated on the upstream side. Furthermore, pressure fluctuations in the suction pressure in the water flow within the throat pipe can be absorbed and alleviated. As a result, according to the present invention, air can be stably introduced into the air introduction pipe, thereby increasing the amount of air supplied into the riser pipe of the throat pipe.

In the present invention, preferably, the air introduction pipe includes an upstream pipe line and a downstream pipe line that are separate members, and the upstream pipe line and the downstream pipe line are connected to each other.
In the present invention configured in this manner, the upstream pipe and the downstream pipe of the air introduction pipe are made of separate members, so the cross-sectional area of the upstream pipe can be changed to adjust the suction pressure. fluctuations can be appropriately suppressed. Furthermore, since the upstream pipe line is a separate member, the size of the air introduction hole can be easily changed.

According to the flush toilet device of the present invention, it is possible to efficiently send the air sucked in from the air introduction hole provided in the air introduction pipe into the rising pipe of the throat pipe, and furthermore, a large amount of flushing water can be used. Even at the site where the necessary flush toilet device is installed, a sufficient amount of flushing water to the toilet body can be ensured by the miniaturized water storage tank.

FIG. 1 is a plan view showing a flush toilet device according to an embodiment of the present invention. 2 is a sectional view taken along line II-II in FIG. 1. FIG. FIG. 2 is a sectional view showing the internal structure of a flush water tank device for explaining the jet pump action of a jet pump unit used in a flush toilet device according to an embodiment of the present invention. 1 is a cross-sectional view showing the internal structure of a flush water tank device of a flush toilet device and a cross section of a flow path in a jet pump unit according to an embodiment of the present invention. FIG. 2 is an enlarged view of an air introduction pipe provided in a jet pump unit of a flush toilet device according to an embodiment of the present invention. It is a graph showing the relationship between the amount of flush water supplied to the toilet main body from the jet pump unit of the flush toilet device according to one embodiment of the present invention and the diameter of the upstream pipe line of the air introduction pipe. FIG. 7(a) is a sectional view showing a conventional air introduction pipe, and FIG. 7(b) is a sectional view showing an air introduction pipe of a flush toilet device according to an embodiment of the present invention. 3 is a graph showing the relationship between the instantaneous flow rate of flush water supplied to the toilet body by the jet pump unit of the flush toilet device according to an embodiment of the present invention and time.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A flush toilet device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
First, the basic structure of a flush toilet device according to an embodiment of the present invention will be explained with reference to FIGS. 1 and 2. FIG. FIG. 1 is a plan view showing a flush toilet device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II--II in FIG. 1.

As shown in FIGS. 1 and 2, a flush toilet device 1 according to an embodiment of the present invention includes a toilet body 2 and a flush water tank device 4 that supplies flush water to the toilet body 2.
The toilet main 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 periphery of the rim portion 8. ing.
Further, an inlet 12a of a trap drain channel 12 is opened at the bottom of the bowl portion 6 of the toilet main body 2, and the trap drain channel 12 is provided with an ascending pipe 12b extending upward and a descending pipe 12c extending downward. . 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 flush toilet that discharges waste by a height difference.
The present invention is also applicable to other flushing toilets such as siphon toilets in addition to the above-mentioned flushing toilets.

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

Next, the washing water tank device 4 will be explained in detail with reference to FIGS. 3 and 4.
FIG. 3 is a sectional view showing the internal structure of a flush water tank device for explaining the jet pump action of a jet pump unit used in a flush toilet device according to an embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional view showing the internal structure of a flush water tank device of a flush toilet device and a cross section of a flow path in a jet pump unit according to an embodiment.
Although FIG. 4 corresponds to the internal structure of the flush toilet according to the embodiment of the present invention, FIG. 3 is for specifically explaining the jet pump action by the jet pump unit, and the internal structure of FIG. It shows a structure different from the structure.

As shown in FIGS. 3 and 4, the wash water tank device 4 includes a water storage tank 26 that is formed in a flat shape that is long in the left-right direction in plan view and stores wash water, and a water supply source such as a water pipe (not shown). ) is provided with a primary side water supply pipe 28 that supplies the water supply tank 26 with wash water supplied from the water supply tank 26 .
The wash water tank device 4 also includes a jet pump unit 32 that includes a water supply valve device 30 that is connected to the upper end (downstream end) of the water supply pipe 28 and shuts off the washing water supplied from the water supply pipe 28; A manual lever 34 (see FIG. 3) is provided for the user to manually supply washing water.
Further, a water stop valve 35 (see FIG. 3) is provided at the lower end (upstream end) of the water supply pipe 28. This water stop valve 35 is used to stop water supply from a water supply source (not shown) when the flush toilet device 1 is installed, and is kept open during normal use.

The jet pump unit 32 also includes a secondary water supply pipe 36 through which water supplied from the water supply valve device 30 flows, a throat pipe 38 disposed on the downstream side of the water supply pipe 36, and a throat pipe 38 on the downstream side of the water supply pipe 36. A jet nozzle 40 is connected to the end of the throat pipe 38 and injects cleaning water toward the throat pipe 38 to induce a jet pump action. A flow path switching valve device 42 is provided for switching from a flow path directed toward the outside of the throat pipe 38 to a flow path directed toward the outside 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 wash water supplied to the water supply valve device 30 a constant flow rate.
Further, a vacuum breaker valve 44 (see FIG. 3) is provided between the water supply pipe 36 on the secondary side and the water supply valve device 30. This is to prevent negative pressure 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 includes 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 which is controlled by internal pressure. A pressure chamber 52 that is moved relative to the toilet seat 50 is provided, and the main valve body 48 switches between a water stop state in which water is stopped when the main valve body 48 is seated on the main toilet seat 50 and a water supply state in which water is supplied while being separated from the main toilet seat 50. It has become.
As shown in FIG. 3, the pressure chamber 52 has a first hole 54 and a second hole 56 that release the pressure of the pressure chamber 52, and a first hole 54 and a second hole 56 that release the pressure of the pressure chamber 52, and a first hole 54 and a second hole 56 that release the pressure of the pressure chamber 52, and A first pilot valve 58 that opens the hole 54, a water supply float 60 that moves up and down according to the water level of the wash water in the water storage tank 26, and a second pilot valve that opens and closes the second hole 56 by the up and down movement of the water supply float 60. 62 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 connects the primary flow path A of the water supply pipe 28 and the pressure chamber. 52 and the inside thereof are communicated with each other. Here, the opening area of the first hole 54 is larger than the opening area of the second hole 56. Further, the first hole 54 is formed at a position higher than 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 flow path A of the water supply pipe 28 communicates with the pressure chamber 52 through the bleed hole. Therefore, the water pressures in the temporary side flow path A and the pressure chamber 52 are the same water pressure (temporary side flow path pressure α). Further, the secondary flow path B is open to the atmosphere, and the area on which water pressure acts on the main valve element 48 is larger than the area of the primary flow path A, so the main valve element 48 is pressed against the main toilet seat 50. The valve is now closed.

In the water supply valve device 30, when the first hole 54 and/or the second hole 56 are opened by the first pilot valve 58 and/or the second pilot valve 62, cleaning water flows out from the pressure chamber 52, and the pressure chamber The pressure inside 52 decreases, and the main valve element 48 moves away from the main toilet seat 50, opening the valve and discharging water.

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 enters a closed state (water cutoff state).
At this time, the cleaning water in the primary flow path A is injected little by little into the pressure chamber 52 from the bleed hole, so after a predetermined time delay after the first hole 54 and the second hole 56 are closed, the main The valve body 48 is in a closed state (water cutoff 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 near the upper end of the ascending pipe 38a, and has a generally inverted V shape. It is formed.
Further, an air introduction pipe 80 (see FIG. 4), the details of which will be described later, is connected to the riser pipe 38a. This air introduction pipe 80 is provided with an air introduction hole 82, and is configured to suck air outside the riser pipe 38a (air inside the water storage tank 26).

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 of the water storage tank 26.
Further, an outlet portion 38d (see FIG. 4) of the downcomer pipe 38b of the throat pipe 38 is connected to the drain port 14 communicating with the water conduit 16 of the toilet main body 2.
Further, a jet nozzle 40 is arranged to face the suction port 38c of the throat pipe 38, and the suction port 38c of the throat pipe 38 and the jet nozzle 40 are always submerged in the water storage tank 26.

Next, when supplying water into the water storage tank 26 after flushing the toilet bowl, the flow path switching valve device 42 of the jet pump unit 32 directs the flow path direction in which the cleaning water injected from the jet nozzle 40 travels to the throat pipe. A flow path switching valve 66 that switches from a flow path directed toward the inside of the throat pipe 38 to a flow path directed toward the outside of the throat pipe 38 (inside the water storage tank 26), and A float 68 that operates the flow path switching valve 66 by moving up and down with the float 68, a connecting portion 70 that connects the float 68 and the flow path switching valve 66, and a height at which the float 68 is connected to the connecting portion 70 in the vertical direction. An adjustment mechanism section 72 for adjustment is provided.

Moreover, 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 that connects between the water supply valve device 30 and the jet nozzle 40.
Furthermore, in the water supply pipe 36 on the secondary side of the jet pump unit 32, a branch line for makeup water is provided on the downstream side of the relief valve device 46 to supply flush water to the toilet main body 2 without going through the jet nozzle 40. A branch pipe 76 to be formed is connected thereto. The downstream end of this branch pipe 76 is connected to an overflow pipe 78 that 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 water conduit 16 of the toilet main body 2.

The jet pump unit 32 sprays high-speed cleaning water from the jet nozzle 40 toward the suction port 38c of the throat pipe 38, thereby applying negative pressure to the space near the suction port 38c in the throat pipe 38, which is close to the jet nozzle 40. inducing a jet pump action (ejector effect). Due to this jet pump action, the cleaning water in the vicinity of the water storage tank 26 is sucked, and this cleaning water and the cleaning water jetted from the jet nozzle 40 are combined and flow through the throat pipe 38, leading to the toilet main body 2. The water is supplied to the waterway 16.
That is, regarding the term "jet pump action" described in this specification, the flow of the large amount of cleaning water injected from the jet nozzle 40 toward the suction port 38c of the throat pipe 38 itself is caused by a pump, etc. Without relying on other mechanical elements, a negative pressure is created that directly draws in the cleaning water around the suction port 38c of the throat pipe 38, and this negative pressure is used to draw in the inside of the throat pipe 38. This means the action of force-feeding the flushing water sucked into the water storage tank 26 to the toilet main body 2 side.

Next, as shown in FIG. 4, the water level WL1 in the water storage tank 26 indicates the water level before cleaning is started, and the water level WL2 indicates the water level when cleaning is completed. Furthermore, the water level WL3 indicates the water level of the air introduction hole 82 formed in the air insertion tube 80.

Next, the air introduction pipe 80 will be described in detail with reference to FIGS. 5 and 6. FIG. 5 is an enlarged view of an air introduction pipe provided in a jet pump unit of a flush toilet device according to an embodiment of the present invention, and FIG. 6 is an enlarged view of an air introduction pipe provided in a jet pump unit of a flush toilet device according to an embodiment of the present invention. It is a graph showing the relationship between the amount of flushing water supplied to the toilet main body and the diameter of the upstream pipe of the air introduction pipe.

First, as shown in FIG. 5, the air introduction pipe 80 includes an upstream pipe line 84 located above and a downstream pipe line 86 located below, which are manufactured as separate members. 84 and a downstream pipe line 86 are connected to each other. Note that the upstream pipe line 84 and the downstream pipe line 86 may have an integral structure.
The upstream pipe line 84 and the downstream pipe line 86 each have a circular cross section. The cross-sectional diameter D1 of the upstream pipe line 84 is larger than the cross-sectional diameter D2 of the downstream pipe line 86. As an example, the cross-sectional diameter D1 of the upstream pipe line 84 is 13 mm, and the cross-sectional diameter D2 of the downstream pipe line 86 is 10 mm.

Here, as shown in FIG. 6, when water is supplied to the jet pump unit 32 at a rate of 19 L/min and the diameter D2 of the downstream pipe line 86 of the air introduction pipe 80 is fixed to 10 mm, as shown in FIG. When the diameter D1 of the upstream pipe line 84 is changed from 10 mm to 15 mm, the amount of flushing water (L) supplied from the jet pump unit 32 to the toilet main body 2 increases from 4.8 L to 8.0 L. From this, if the diameter D1 of the upstream pipe line 84 and the diameter D2 of the downstream pipe line 86 of the air introduction pipe 80 are the same, only 4.8 L of flush water can be supplied to the toilet main body 2; It can be seen that when the diameter D1 of the upstream pipe line 84 of the air introduction pipe 80 is set to a larger value than the diameter D2 of the downstream pipe line 86, more flushing water is supplied to the toilet main body 2.

From this FIG. 6, when the diameter D2 of the downstream pipe line 86 of the air introduction pipe 80 is 10 mm, a preferable amount of washing water (L) can be obtained by changing the diameter D1 of the upstream pipe line 84 from 11 mm to 14 mm. As a result, the capacity of the water storage tank 26 can be reduced. In other words, the diameter D1 of the upstream pipe 84 of the air introduction pipe 80 is preferably 1.1 to 1.4 times larger than the diameter D2 of the downstream pipe 86.

Next, as shown in FIG. 5, the central axis X1 of the upstream pipe line 84 and the central axis X2 of the downstream pipe line 86 are coaxially arranged. Further, each of the upstream pipe line 84 and the downstream pipe line 86 has the same cross-sectional shape along its length.
Further, the upstream pipe line 84 and the downstream pipe line 86 are connected by a changing part 88, which is located at the upper end side of the downstream pipe line 86 and has an arc shape with a radius of curvature of Rmm. The diameter of the cross section becomes smaller from upstream to downstream. Here, R is preferably 0.5 mm to 1.5 mm.

Next, the volume V1 of the upstream pipe line 84 is larger than the volume V2 of the downstream pipe line 86. As an example, the volume V1 of the upstream pipe line 84 is 2700 mm ³ , and the volume V2 of the downstream pipe line 86 is 1000 mm ³ . Here, V1 is preferably 1.5 to 3.0 times larger than V2.

The air introduction hole 82 is formed on the circumferential surface of the upstream pipe line 84 and is a circular hole. The height position of this air introduction hole 82 is the above-mentioned position WL3, and when the water level of the water storage tank 26 drops to WL3, the air in the water storage tank 26 is introduced from the air introduction hole 82 into the air introduction pipe 80. After that, it is supplied into the riser pipe 38a of the throat pipe 38. Here, the diameter of the air introduction hole 82 is preferably 2.0 mm to 10.0 mm.

Next, the operation (function) of the flush toilet device according to this embodiment will be explained with reference to FIGS. 3 to 8. FIG. 7(a) is a sectional view showing a conventional air introduction pipe, and FIG. 7(b) is a sectional view showing an air introduction pipe of a flush toilet device according to an embodiment of the present invention. FIG. 8 is a graph showing the relationship between the instantaneous flow rate of flush water supplied to the toilet body by the jet pump unit of the flush toilet device according to an embodiment of the present invention and time.
In FIG. 8, A drawn with a two-dot chain line indicates the instantaneous flow rate when a jet pump unit without an air introduction hole is used. The figure shows the instantaneous flow rate when using a jet pump unit (the inner diameters of the upstream and downstream sides are the same), and the solid line C shows the instantaneous flow rate of the flush toilet device according to the present embodiment.

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 both closed, the main valve body 48 is seated on the main toilet seat 50, and water is cut off.

When the user manually operates the manual lever 34 to start cleaning, the drive shaft 64 connected to the manual lever 34 rotates, and the first pilot valve 58 of the water supply valve device 30 operates to open 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 enter the water supply state. As a result, the cleaning water supplied from the external water supply reaches the jet nozzle 40 via the water stop valve 35, the constant flow valve 43, the water supply valve device 30, and the secondary side water supply pipe 36. Cleaning water is sprayed from the suction port 38c of the throat pipe 38. At this time, since the vicinity of the suction port 38c of the throat pipe 38 becomes negative pressure, the cleaning water stored in the water storage tank 26 is also sucked into the throat pipe 38, and the cleaning water supplied from the outside by the cleaning water tank device 4 The cleaning water in the water storage tank 26 flows together through the throat pipe 38 and is supplied to the toilet main body 2, and cleaning of the bowl portion 6 is started (time t0 in FIG. 8). When the cleaning starts, the water level in the water storage tank 26 decreases, and the water supply float 60 descends. As soon as the water supply float 60 is lowered, the second pilot valve 62 is actuated, thereby opening the second hole 56. At this time, the first hole 54 was in an open state by operating the manual lever 34, but it becomes a closed state at the timing when the second hole 56 opens. 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 the float 68 of the flow path switching valve device 42 rises. In this state, the flow path switching valve 66 is lowered, and the front side of the jet nozzle 40 is opened. As a result, the flushing water stored in the water storage tank 26 flows toward the jet nozzle 40 and the suction port 38c of the throat pipe 38, and a large flow of flushing water is supplied to the toilet main body 2 (time in FIG. 8). t1).

As time passes after the supply of flush water to the toilet main body 2 starts, the water level in the water storage tank 26 decreases, and the height of the air introduction hole 82 formed in the upstream pipe line 84 of the air introduction pipe 80 decreases. When the water drops to position WL3, air is sucked into the throat pipe 38 through which the cleaning water is flowing from the air introduction hole 82 due to the negative pressure generated along with the flow of water in the riser pipe 38a. As a result, the flow rate (instantaneous flow rate) of the flushing water supplied to the toilet main body 2 through the throat pipe 38 is reduced at once. (See t2 in FIG. 8).

This is because the air sucked into the riser pipe 38a of the throat pipe 38 from the air introduction hole 82 reduces the area through which the wash water flows in the riser pipe 38a, thereby suppressing the flow rate of the wash water. In this way, when the amount of air sent into the riser pipe 38a increases, the flow rate of flushing water supplied to the toilet main body 2 decreases. This reduces the amount of cleaning water in the water storage tank 26 that is sucked into the throat pipe 38 by the jet nozzle 40.
In other words, the larger the amount of air sent into the riser pipe 38a, the slower the water level in the water storage tank 26 decreases, the longer the water supply time, and finally the flow from the water storage tank 2 to the toilet main body 2. The amount of washing water to be supplied can be increased.

When the water level in the water storage tank 26 decreases to WL2, the float 68 also decreases to the water level WL2 in conjunction with the decrease 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 cleaning water jetted from the jet nozzle 40 collides with the flow path switching valve 66 and does not flow inside the throat pipe 38. It is switched by the road switching valve 66. As a result, the supply of flush water to the toilet main body 2 is stopped (time t5 in FIG. 8).

Thereafter, the flow direction of the cleaning water injected from the jet nozzle 40 is switched to the outside of the throat pipe 38 by the flow path switching valve 66, and the water 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 is operated, and the second hole 56 is closed. As a result, the pressure in the pressure chamber 52 becomes the primary flow path pressure α, the main valve body 48 moves toward the main toilet seat 50, and finally enters a closed state (water cutoff state). The water supply valve device 30 enters the water stop state, water supply ends, and the cleaning operation ends.

Next, with reference to FIGS. 5 to 8, in the air introduction pipe 80, the cross-sectional diameter D1 of the upstream flow path 84 is made larger than the cross-sectional diameter D2 of the downstream flow path 86, and furthermore, the upstream side The effects of making the volume V1 of the flow path 84 larger than the volume V2 of the downstream flow path 86 will be explained.
First, as shown in FIG. 8, in the flush toilet device 1 according to the present embodiment, the cross-sectional diameter D1 of the upstream flow path 84 of the air introduction pipe 80 is larger than the cross-sectional diameter D2 of the downstream flow path 86. (corresponding to C in Fig. 8), the air introduction pipe 80 (corresponding to The water supply time to the toilet main body 2 can be made longer than when using a jet pump unit 32 (corresponding to B in FIG. 8), which has the same inner diameter on the side and the downstream side (corresponding to B in FIG. 8). This can be done by making the cross-sectional diameter D1 of the upstream flow path 84 of the air introduction pipe 80 larger than the cross-sectional diameter D2 of the downstream flow path 86 (further, the volume V1 of the upstream flow path 84 is By making the volume of the passage 86 larger than V2), the amount of air supplied from the air introduction pipe 80 into the riser pipe 38a of the throat pipe 38 increases, thereby increasing the flow rate of the wash water flowing inside the throat pipe 38. This is because it is reduced.

Next, the diameter D1 of the cross section of the upstream flow path 84 of the air introduction pipe 80 was made larger than the diameter D2 of the cross section of the downstream flow path 86, as shown in FIG. The flush toilet device 1 according to the present embodiment (in which the volume V1 is larger than the volume V2 of the downstream flow path 86) is equipped with an air introduction pipe (the upstream and downstream sides have the same inner diameter) shown in FIG. 7(a). The reason why the amount of air supplied from the air introduction pipe 80 into the rising pipe 38a of the throat pipe 38 is larger than that of a conventional flush toilet device using a jet pump unit will be explained.

First, in the flush toilet device 1 according to the present embodiment, as shown in FIG. 7(b), air is introduced from the air introduction hole 82, which is a relatively small opening, into the upstream flow path 84, which has a large volume. Therefore, air pressure fluctuations are absorbed within the upstream flow path 84, and turbulent flow can alleviate the occurrence of backflow.

Furthermore, as shown in FIG. 7B, when air flows from the upstream flow path 84 to the downstream flow path 86, the cross-sectional area becomes smaller, so the air flow contracts and the speed increases. Furthermore, within the downstream flow path 86, the air velocity distribution is such that the air speed accelerates at the center and decelerates at the periphery. Since this air (elongated air column) with a velocity distribution whose center is accelerated is supplied into the riser pipe 38a of the throat pipe 38, it is easily released as bubbles within the riser pipe 38a. In this way, the resistance to air introduction is reduced, and the amount of air supplied from the air introduction pipe 80 into the riser pipe 38a is increased.

On the other hand, in the conventional flush toilet device, as shown in FIG. Furthermore, since air is supplied into the riser pipe 38a with almost the same velocity distribution at the center and around the periphery, the resistance to air introduction is large, and the air is supplied from the air introduction pipe 80 into the riser pipe 38a accordingly. The amount of air flowing through the air does not increase.

If the amount of air supplied from the air introduction pipe 80 to the riser pipe 38a of the throat pipe 38 increases, the flow rate of the wash water in the riser pipe 38a will be reduced accordingly, so that the wash water in the water storage tank 26 will be reduced. The descending speed of the water level is reduced, and the time for which the jet pump unit 32 supplies flushing water to the toilet main body 2 can be extended. Even if the capacity of the water storage tank 26 is the same, according to the flush toilet device 1 according to the present embodiment, a large amount of flush water can be supplied to the toilet main body 2, so the size of the water storage tank 26 is reduced accordingly. be able to.
In this way, in this embodiment, it is possible to increase the amount of washing water supplied from the outside to the toilet main body 2 by the washing water tank device 4, and even in a site where a large amount of washing water is required, the system can be made smaller. The water storage tank 26 ensures a sufficient amount of flushing water to the toilet main body 2.

Hereinafter, the effects of the flush toilet device 1 according to this embodiment will be explained in more detail.
In the flush toilet device 1 according to the present embodiment, the cross-sectional area of the upstream pipe 84 of the air introduction pipe 80 is larger than the cross-sectional area of the downstream pipe 86. The pressure fluctuation of the air introduced in the upstream pipe line 84 is alleviated, and the air is smoothly introduced into the rising pipe 38a of the throat pipe 38 from the downstream pipe line 86. As a result, the water storage tank 26 can be made smaller.

Furthermore, in the flush toilet device 1 according to the present embodiment, since the cross section of the air introduction pipe 80 is approximately circular, the entire circumference is uniform, and therefore, the air introduced into the air introduction pipe 80 from the air introduction hole 82 is uniform. This makes it difficult for variations in the flow rate of the air to occur, thereby making it possible to increase the amount of air introduced into the air introduction pipe 80. Furthermore, since the central axis of the upstream pipe line 84 and the central axis of the downstream pipe line 86 of the air introduction pipe 80 are arranged coaxially, air flows from the upstream pipe line 84 to the downstream side of the air introduction pipe 80. The air flows smoothly into the side pipe 86, thereby increasing the amount of air introduced into the riser pipe 38a.

Furthermore, in the flush toilet device 1 according to the present embodiment, the cross-sectional area of the upstream pipe line 84 and the cross-sectional area of the downstream pipe line 86 of the air introduction pipe 80 are approximately constant, and the cross-sectional area of the upstream pipe line 84 is substantially constant. Since a flow passage cross-sectional area changing portion 88 is provided between the downstream side pipe 86 and the flow passage 86, the air introduced into the air introduction pipe 80 from the air introduction hole 82 is rectified within the air introduction pipe 80. , air can be smoothly supplied into the riser pipe 38a of the throat pipe 38.

Furthermore, in the flush toilet device 1 according to the present embodiment, the flow path cross-sectional area changing portion 88 of the air introduction pipe 80 is formed in an R shape such that the cross-sectional area becomes smaller. The air flowing from the upstream pipe line 84 to the downstream pipe line 86 flows smoothly without being stagnant in the changing part 88.

Furthermore, in the flush toilet device 1 according to the present embodiment, since the volume of the upstream pipe line 84 of the air introduction pipe 80 is formed larger than the volume of the downstream pipe line 86, the upstream pipe line 84 is expanded. This becomes a space, and the pressure fluctuation of the air introduced from the air introduction hole 82 into the air introduction pipe 80 can be alleviated in the upstream pipe line 84. Furthermore, pressure fluctuations in the suction pressure in the water flow within the throat pipe 38 can be absorbed and alleviated. As a result, according to this embodiment, air can be stably introduced into the air introduction pipe 80, thereby increasing the amount of air supplied into the riser pipe 38a of the throat pipe 38.

Furthermore, in the flush toilet device 1 according to the present embodiment, the upstream pipe line 84 and the downstream pipe line 86 of the air introduction pipe 80 are made of separate members, so that the flow passage cross-sectional area of the upstream pipe line 84 is can be changed to appropriately suppress fluctuations in suction pressure. Furthermore, since the upstream pipe line 84 is a separate member, the size of the air introduction hole 82 can be easily changed.

1 Flush toilet device 2 Toilet main body 4 Cleaning water tank device 6 Bowl portion 14 Drain port 16 Water conduit 26 Water storage tank 30 Water supply valve device 32 Jet pump unit 36 Secondary water supply pipe 38 Throat pipe 38a Rising pipe 38b Descending pipe 38c Suction port 38d Outlet part 40 Jet nozzle 42 Flow path switching valve device 68 Float 70 Connecting part 72 Adjustment mechanism part 80 Air introduction pipe 82 Air introduction hole 84 Upstream pipe line 86 Downstream pipe line 88 Change part

Claims (4)

A flush toilet device that supplies flush water to the toilet main body to clean it using a jet pump action,
A toilet main body including a bowl part for receiving filth and a water conduit for guiding washing water to the bowl part;
a water storage tank that stores flush water to be supplied to the toilet main body;
a jet pump unit that is disposed at least partially submerged in the water storage tank and supplies flush water in the water storage tank to the toilet main body;
The jet pump unit includes a throat pipe including a riser pipe extending diagonally upward from a suction port formed below the jet pump unit;
a jet nozzle that injects cleaning water toward the suction port of the throat pipe to induce a jet pump action;
A water supply valve that stops the supply of cleaning water from the water supply source to the jet nozzle,
The riser pipe of the throat pipe is provided with an air introduction pipe that introduces the air in the water storage tank into the riser pipe at a predetermined water level, and this air introduction pipe has a flow passage cross-sectional area on the upstream side that is smaller than that on the downstream side. The air introduction pipe is formed to be larger than the cross-sectional area of the flow path, and an air introduction hole for introducing air in the water storage tank is formed on the upstream side of the air introduction pipe .
The cross-sectional area on the upstream side and the cross-sectional area on the downstream side of the air introduction pipe are substantially constant, and a portion where the cross-sectional area of the flow path changes is provided between the upstream side and the downstream side,
In the flush toilet device , the portion where the cross-sectional area of the flow path changes is formed in an R shape such that the cross-sectional area thereof becomes smaller . A flush toilet device that supplies flush water to the toilet main body to clean it using a jet pump action,
A toilet main body including a bowl part for receiving filth and a water conduit for guiding washing water to the bowl part;
a water storage tank that stores flush water to be supplied to the toilet main body;
a jet pump unit that is disposed at least partially submerged in the water storage tank and supplies flush water in the water storage tank to the toilet main body;
The jet pump unit includes a throat pipe including a riser pipe extending diagonally upward from a suction port formed below the jet pump unit;
a jet nozzle that injects cleaning water toward the suction port of the throat pipe to induce a jet pump action;
A water supply valve that stops the supply of cleaning water from the water supply source to the jet nozzle,
The riser pipe of the throat pipe is provided with an air introduction pipe that introduces the air in the water storage tank into the riser pipe at a predetermined water level, and this air introduction pipe has a flow passage cross-sectional area on the upstream side that is smaller than that on the downstream side. The air introduction pipe is formed to be larger than the cross-sectional area of the flow path, and an air introduction hole for introducing air in the water storage tank is formed on the upstream side of the air introduction pipe .
A flush toilet device , wherein the volume on the upstream side of the air introduction pipe is larger than the volume on the downstream side . The water washing according to claim 1 or 2 , wherein the air introduction pipe has a substantially circular cross section, and an upstream central axis and a downstream central axis of the air introduction pipe are coaxially arranged. Urinal device. Any one of claims 1 to 3 , wherein the air introduction pipe includes an upstream pipe line and a downstream pipe line that are separate members, and the upstream pipe line and the downstream pipe line are connected to each other. The flush toilet device according to item 1.

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