JP2016011500A - Water closet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet device capable of reducing a forward appearance dimension of a water closet device, and capable of preventing reduction in an instantaneous flow rate of water supplied to a toilet bowl body by suppressing an air reservoir generated on the downstream side of a bending position of a throat pipe, in the water closet device capable of arranging a tank in a rear upper part of the toilet bowl body, by using the inverse U-shaped throat pipe.SOLUTION: A water closet device uses the jet pump action by using a jet pump unit, and comprises air reservoir restraining means 500 for restraining an air reservoir generated inside a throat pipe 320 even when using the inverse U-shaped throat pipe 320.

Description

The present invention relates to a flush toilet apparatus for washing a toilet body with flush water.

  2. Description of the Related Art Conventionally, flush toilet apparatus using a tank type or direct pressure type water supply mechanism has been widely used as a mechanism for supplying flush water to a toilet body.

The tank-type water supply mechanism stores water in advance in a tank and supplies the water as flush water to the toilet body. In such a tank-type water supply mechanism, since it is necessary to store all of the water supplied as cleaning water in the tank, there was a problem that the tank mounted on the flush toilet device would be enlarged. .

  In addition, after the toilet bowl is cleaned, it is necessary to keep the tank full for the next cleaning, but it takes time to fill the large tank with water. . For this reason, it is difficult for the tank-type water supply mechanism to perform continuous cleaning (every short time), and there is a problem that the flush toilet apparatus is not suitable for a situation where the flush toilet apparatus is frequently used.

  The direct pressure type water supply mechanism supplies cleaning water from the water supply pipe to the toilet body using water pressure in the water supply pipe (water pipe) arranged in the building. In such a direct pressure type water supply mechanism, since the flow rate of the washing water depends on the water pressure in the water supply pipe, when the flush toilet apparatus is installed in an environment where the water pressure is low (for example, a high floor), There existed a subject that performance fell. Moreover, in order to be able to supply a large flow rate of water by the direct pressure type water supply mechanism, it is necessary to make the water supply pipe connected to the flush toilet device have a large diameter. For this reason, there was a problem of requiring large-scale construction.

  A jet pump type water supply mechanism has been newly proposed as a water supply mechanism that can simultaneously solve both of the problems in the tank type water supply mechanism and the problems in the direct pressure type water supply mechanism (the following patents). Reference 1).

  The jet pump type water supply mechanism described in Patent Document 1 below includes a tank storing water, and the jet pump unit is disposed in the tank while being submerged. The jet pump unit has a throat pipe. One end of the throat pipe is connected to a flow path toward the bowl portion of the toilet body, and an opening is formed at the other end. When water is sprayed from the spray nozzle to the inside of the throat pipe through the opening, a jet pump action is induced, so that a large flow of water flows toward the bowl portion inside the throat pipe. Since not only the water sprayed from the spray nozzle but also the water stored in the tank is drawn and flows through the throat pipe, a large amount of flush water is supplied to the toilet body.

In the jet pump type water supply mechanism, it is not necessary to store all the water supplied to the toilet body as cleaning water in the tank. For this reason, compared with a tank-type water supply mechanism, there is an advantage that the tank can be miniaturized and the time required for filling the tank to the full water level can be shortened. Moreover, even if the flush toilet apparatus is installed in an environment where the water pressure in the water supply pipe is relatively low, a large flow of flush water can be supplied to the toilet body. Furthermore, there is an advantage that a large-scale construction that makes the water supply pipe large in diameter is not required.

JP 2004-156382 A

  As described above, the flush toilet apparatus described in Patent Document 1 needs to store all of the water supplied to the toilet body as wash water in the tank by using a jet pump type water supply mechanism. However, if the tank is provided at the rear side of the toilet body, the front size of the flush toilet device becomes longer, and the toilet where the flush toilet device is installed The range in which the user can move in space is narrowed.

In addition, in order to reduce the size of the tank and the size of the flush toilet device, a throat pipe with an inverted U-shape that bends the throat pipe for supplying water in the tank to the toilet body is used. Then, when the water jetted from the jet nozzle passes through the throat pipe, the water flow and the inner wall of the throat pipe are separated on the downstream side of the position where the throat pipe is bent. If the water flow and the inner wall of the throat pipe are separated, the air existing inside the throat pipe cannot be discharged before the water in the tank is supplied to the toilet body, and the air stays inside the throat pipe. Due to this, the air staying inside the throat pipe gives resistance to the supplied water flow by its own buoyancy, the instantaneous flow rate of the water supplied to the toilet body is lowered, and the discharge property of filth is lowered. I found out that

  This invention is made | formed in view of such a subject, The objective came to be able to arrange | position a tank to the rear upper part of a toilet bowl main body by using an inverted U-shaped throat pipe. A flush toilet apparatus, which can reduce the size of the flush toilet apparatus, and is supplied to the toilet body by suppressing an air pool generated downstream from the bent position of the throat pipe. An object of the present invention is to provide a flush toilet apparatus capable of preventing the instantaneous flow rate of water from decreasing.

In order to solve the above-mentioned problems, a flush toilet apparatus according to the present invention is a flush toilet apparatus for washing a toilet body with washing water, and has a bowl portion for receiving filth, and is supplied as washing water. A toilet body having a water conduit for guiding the water to the bowl portion formed therein, and storing water therein, so that the water can be supplied to the inlet of the water conduit A tank disposed at the upper rear side of the toilet body, and a jet pump unit disposed inside the tank, the jet pump unit having one end connected to the inlet of the water conduit and the other end Has a throat pipe in which a suction port is formed, and a nozzle that induces a jet pump action by injecting high-speed water from the suction port toward the inside of the throat pipe. And a bent tube disposed on the downstream side of the rising portion, and a downstream side of the bent portion, and downward from the bent portion. And a descending portion that extends, and is formed so as to have an inverted U-shape as a whole. Further, the throat pipe is configured to supply water inside the tank to the water conduit. In the present invention, there is provided an air reservoir suppressing means for suppressing an air reservoir generated at the descending portion of the throat pipe.

  The first invention is to reduce the size of the flush toilet device by placing a tank that has been reduced in size by using a jet pump unit in the flush toilet device at the upper rear side of the toilet body. I can do it now. Therefore, the space on the front side of the flush toilet device in the toilet space where the flush toilet device is installed can be widened, and the range in which the user can move can be widened.

By arranging the tank at the upper rear side of the toilet body, if the throat pipe is to be connected to the inlet of the conduit, it is necessary to provide the inlet of the conduit at the bottom of the tank. When trying to supply water in the tank to the water conduit using the jet pump action, the suction port of the throat pipe needs to be submerged in the water stored in the tank. It becomes a shape.
When such an inverted U-shaped throat pipe is used, the flow rate of water sprayed from the nozzle is high, so that the inner wall of the throat pipe and the water flow are separated from each other when passing through the bent portion. Air that was present in the throat pipe before supplying water to the water conduit will not be discharged from the throat pipe. If the air that was present in the throat pipe cannot be discharged and an air pool is generated inside the throat pipe, the air gives resistance to the water flow passing through the throat pipe by its own buoyancy, and the water guide channel Although the instantaneous flow rate of the water supplied to the slag decreases and the discharge of filth decreases, it is possible to suppress the accumulation of air that occurs at the descending part of the throat pipe by having an air retaining control means at the descending part. Even when an inverted U-shaped throat pipe is used, it is possible to suppress a decrease in the instantaneous flow rate of water supplied to the water conduit without receiving resistance due to air accumulation. Since it is possible to suppress a decrease in the instantaneous flow rate, it is possible to prevent a decrease in the discharge of filth in the flush toilet apparatus.

  The air accumulation suppressing means according to the second invention is characterized in that a traveling direction changing portion for changing a traveling direction of water passing through the inside of the throat pipe is provided in the descending portion.

  By providing the descending portion with a traveling direction changing portion that changes the traveling direction of water passing through the inside of the throat pipe, the traveling direction of water passing through the inside of the throat pipe can be changed to a position where an air pocket is generated. . Therefore, the air pocket can be discharged by the water passing through the inside of the throat pipe, and the air pool generated inside the throat pipe can be suppressed. Therefore, the fall of the instantaneous flow volume of the water supplied to a water conduit can be suppressed, and the fall of the waste property of the flush toilet apparatus can also be prevented.

When the third invention is viewed from a position where the throat pipe looks like an inverted U shape,
The bent portion has a first curved surface and a second curved surface having a smaller curvature than the curvature of the first curved surface, and the wall surface of the descending portion on the downstream side of the first curved surface is a first descending portion, When the wall surface of the descending portion on the downstream side of the second curved surface is a second descending portion, the traveling direction changing portion is provided in the first descending portion.

By providing the advancing direction changing portion in the first descending portion, separation occurs when water passes through the bent portion, but the space in which air can stay can be reduced because separation occurs. Furthermore, even when water is peeled off, the space in which air can stay is narrow, so that it can be reattached to the traveling direction changing portion at an early stage. By reattaching the water to the traveling direction changing portion, the water becomes a flow of water along the wall surface of the traveling direction changing portion, and the traveling direction of the water flow is changed. Thereby, the advancing direction of the water flow is changed to the first descending portion side, and it is possible to suppress the accumulation of air by the water flow. Since an air pool can be suppressed, the fall of the instantaneous flow rate of the water supplied to a water conduit can be suppressed, and the fall of the waste property of the flush toilet apparatus can also be prevented.

  According to a fourth aspect of the present invention, when the throat tube is viewed from a position where it looks like an inverted U shape, the bent portion includes a first curved surface and a second curved surface having a smaller curvature than the curvature of the first curved surface. And changing the advancing direction when the wall surface of the descending portion downstream of the first curved surface is a first descending portion and the wall surface of the descending portion downstream of the second curved surface is a second descending portion. The portion is provided in the second descending portion.

  The air pool is generated on the first curved surface side where the curvature of the bent portion is large, but the water passing through the throat pipe increases the flow rate passing through the second curved surface side due to the centrifugal force acting when passing through the bent portion. End up. Therefore, by providing the traveling direction changing part in the second descending part, the traveling direction of water can be changed to the first descending part side, and the air generated on the first descending part side by the water whose traveling direction has been changed. The pool can be drained. Since the air pool can be discharged, it is possible to suppress a decrease in the instantaneous flow rate of the water supplied to the water conduit, and it is also possible to prevent a decrease in the dischargeability of filth in the flush toilet apparatus.

According to the present invention, there is provided a flush toilet apparatus in which a tank can be disposed on the rear upper part of a toilet body by using an inverted U-shaped throat pipe, and the front of the flush toilet apparatus is provided. A flush toilet that can reduce the projecting dimension and prevent the instantaneous flow rate of water supplied to the toilet body from decreasing by suppressing the air accumulation generated downstream of the bent position of the throat pipe An apparatus can be provided.

It is sectional drawing which shows the flush toilet apparatus which concerns on this invention. It is a top view of the flush toilet apparatus shown in FIG. It is a figure which shows the inside of the tank of the flush toilet apparatus shown in FIG. FIG. 5 is a schematic diagram in which water sprayed from a nozzle 310 in the first embodiment passes through the throat pipe 320 to a bent portion 323. It is a schematic diagram when water passing through the inside of the throat pipe 320 in the first embodiment passes through the descending part 324. It is a schematic diagram at the time of the air pocket which generate | occur | produces inside the throat pipe | tube 320 in 1st embodiment being discharged | emitted. It is a schematic diagram in which water sprayed from the nozzle 310a in the second embodiment passes through the throat pipe 320a to the bent portion 323a. It is a schematic diagram at the time of the water which passes the inside of the throat pipe 320a in 2nd embodiment passing the descent | fall part 324a. It is a schematic diagram when the air pocket generated inside the throat pipe 320a in the second embodiment is discharged.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A flush toilet apparatus FT according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the flush toilet apparatus FT, showing a cross section when the flush toilet apparatus FT is cut along a plane perpendicular to the left-right direction. FIG. 2 is a top view of the flush toilet apparatus FT. In FIG. 2, in order to show the internal structure of the tank 20 described later, a state in which the upper cover 201 of the tank 20 is removed is illustrated.

  As shown in FIGS. 1 and 2, the flush toilet apparatus FT includes a toilet main body 10 and an upper surface of the toilet main body 10 on the rear side (right side in FIG. 1, upper side in FIG. 2) of the toilet main body 10. The tank 20 installed in 101 is provided. The flush toilet device FT is a device that receives filth by the toilet body 10 and discharges the filth to the drain pipe SW with water (wash water) supplied from the tank 20.

  In the following description, the right side (left side in FIG. 2) viewed from the user seated on the toilet body 10 is referred to as the “right side” and is seated on the toilet body 10 unless otherwise specified. The left side when viewed from the state user is referred to as the “left side” (right side in FIG. 2). Further, the front side (left side in FIG. 1, lower side in FIG. 2) viewed from the user seated on the toilet body 10 is referred to as “front side” or “front side” and is seated on the toilet body 10. The rear side (the right side in FIG. 1 and the upper side in FIG. 2) viewed from the user in this state is referred to as “rear side” or “rear side”.

  The toilet body 10 includes a bowl portion 110, a rim portion 120, a water conduit 130, and a drain trap conduit 140. The bowl part 110 is a part that temporarily receives the filth falling from above. The rim portion 120 is formed on the upper edge portion of the bowl portion 110 and has a shape in which a part of the inner side surface of the bowl portion 110 is retreated toward the outer peripheral side as shown in FIG. Yes. As will be described later, the rim 120 is a flow path in which water supplied toward the bowl 110 is swirled. The rim part 120 is formed as a substantially circular (top view) flow path that goes around the upper edge of the bowl part 110.

  The water conduit 130 is a channel formed inside the toilet body 10 in order to guide the water supplied from the tank 20 to the bowl portion 110. One end of the water conduit 130 opens on the upper surface 101 of the toilet body 10, and serves as an inlet 131 for water supplied from the tank 20. The position where the inlet 131 is formed is a rear portion of the upper surface 101 of the toilet body 10 and a central portion in the left-right direction.

  The water conduit 130 is branched into two flow paths (a first water conduit 132 and a second water conduit 134) on the downstream side thereof. The downstream end of the first water conduit 132 that is one of the channels opens at the right side of the rim portion 120, and the opening serves as a water outlet (water discharge portion 133). When water is supplied from the tank 20 to the inlet 131, a part of the water passes through the inside of the first water conduit 132 and is ejected from the water discharge part 133 and supplied to the rim part 120.

  The second water conduit 134, which is the other channel, is open at the downstream end of the rim portion 120 on the left side and the rear side, and the opening serves as a water outlet (water discharge portion 135). ing. When water is supplied from the tank 20 to the inlet 131, a part of the water passes through the inside of the second water conduit 134 and is ejected from the water discharge portion 135 and supplied to the rim portion 120.

The direction in which water is ejected from the water discharger 133 is a direction along the circumference of the rim 120 formed as a substantially circular flow path, and is a counterclockwise direction when viewed from above. The direction in which water is ejected from the water discharger 135 is also a direction along the circumference of the rim 120 formed as a substantially circular flow path, and is also a counterclockwise direction when viewed from above. As indicated by arrows in FIG. 2, the water spouted from the water discharger 133 and the water discharger 135 to the rim part 120 flows while swirling counterclockwise along the rim part 120, and the entire rim part 120. Then flows down toward the bowl 110.

  The drain trap pipe 140 is a flow path that connects the lower end of the bowl part 110 and the drain pipe SW. The drain trap pipe 140 has an ascending channel 141 formed so as to rise upward along the direction from the lower end of the bowl portion 110 toward the downstream, and along the direction from the upper end of the ascending channel 141 toward the downstream. And a descending flow path 142 formed to have a downward slope. With such a configuration, water can be stored in a portion extending from the lower part of the bowl part 110 to the lower part of the ascending flow path 141, and the sealed water WT is formed by the stored water. A drain pipe SW is connected to the lower end of the descending flow path 142. The drain pipe SW is a pipe arranged inside the building, and its downstream end is connected to a sewer pipe (not shown).

When water is supplied from the tank 20 toward the bowl portion 110, the water flows down from the entire rim portion 120 toward the bowl portion 110 while swirling and flowing through the rim portion 120 as described above. Water is added to the bowl part 110 from above, and is discharged from the lower end part of the bowl part 110 through the ascending channel 141 and the descending channel 142. As a result, a downward flow occurs in the water (sealed water WT) stored in the bowl portion 110.

  The filth that has been temporarily received in the bowl portion 110 is pushed downward by the water supplied from the upper rim portion 120 and moves toward the lower end of the bowl portion 110. Thereafter, the filth passes through the ascending channel 141 and reaches the descending channel 142 by the water flow, and falls together with the water toward the drain pipe SW.

  The tank 20 is a container in which water is stored, and supplies the water to the inlet 131 of the water conduit 130. The tank 20 includes a first tank part 210 and a second tank part 220 formed so as to extend a part of the bottom wall 211 of the first tank part 210 downward. The first tank part 210 and the second tank part 220 are both substantially rectangular parallelepiped containers, and their internal spaces communicate with each other. The second tank portion 220 is connected to a rear portion of the bottom wall 211 of the first tank portion 210.

  The bottom wall 211 of the first tank part 210 (the part on the front side of the second tank part 220) is in a state of being close to the part on the rear side of the upper surface 101 of the toilet body 10 from above. Specifically, an inlet 131 is formed in a rear side portion of the upper surface 101 of the toilet body 10, but the bottom wall 211 of the first tank unit 210 covers the periphery of the inlet 131 from above. The upper surface 101 of the toilet body 10 is close to the upper surface 101 from above. In addition, an opening 212 having substantially the same shape as the inlet 131 is formed in the bottom wall 211, and the opening 212 and the inlet 131 overlap in a top view. For this reason, the water stored in the tank 20 can flow into the water conduit 130 through the opening 212 and the inlet 131 and flow toward the bowl portion 110.

  As a result of arranging the first tank part 210 as described above, the second tank part 220 is located behind the toilet body 10. That is, it is in a state of being located further rearward than the rear end of the toilet body 10. Further, the bottom wall 221 of the second tank unit 220 is disposed at a position lower than the upper surface 101 of the toilet body 10.

  By arranging the tank 20 as described above, the front end portion of the tank 20 is positioned on the front side of the rear end portion of the toilet body 10. Further, the lower end portion of the tank 20 is located below the upper surface 101 of the toilet body 10. As a result, the dimension in the front-rear direction and the dimension in the vertical direction of the entire flush toilet apparatus FT are both small, and the design of the flush toilet apparatus FT is improved.

  Next, the internal configuration of the tank 20 will be described. FIG. 3 is a perspective view showing the inside of the tank 20 when the flush toilet apparatus FT is viewed from the rear side. As shown in FIG. 3, a water supply pipe 231, a main valve 233, a pilot valve 234, and a jet pump unit 300 are disposed inside the tank 20.

  The water supply pipe 231 is a pipe for supplying water toward the main valve 233, and is arranged to extend vertically upward from the bottom wall 221 of the second tank portion 220. The lower end of the water supply pipe 231 is connected to a water pipe (not shown) outside the tank 20. The upper end of the water supply pipe 231 is connected to the main valve 233 from below in the tank 20. The water supply pipe 231 is disposed in the tank 20 at a position on the left side of the center in the left-right direction.

  A constant flow valve 232 (not shown in FIG. 3) is arranged in the middle of the water supply pipe 231 (between the water pipe and the main valve 233). When the main valve 233 is opened, the flow rate of water flowing into the main valve 233 is constant by the constant flow valve 232, and does not fluctuate due to the water pressure in the water pipe.

  The main valve 233 is an open / close valve that opens and closes the water flow path from the water supply pipe 231 to the jet pump unit 300. A vacuum breaker 235 is provided between the main valve 233 and the jet pump unit 300, and the upstream side of the vacuum breaker 235 is prevented from being negatively pressured to prevent water from flowing backward. As described above, the water supply pipe 231 extends upward, and the main valve 233 and the vacuum breaker 235 are arranged at a high position in the tank 20. For this reason, the vacuum breaker 235 will not be submerged even when the water level of the tank 20 is full.

  The main valve 233 is provided with a pilot valve 234, and the operation of the pilot valve 234 is configured to switch between opening and closing of the main valve 233. A manual lever 236 disposed outside the tank 20 is connected to the pilot valve 234 via a transmission mechanism 237 disposed inside the tank 20. Further, a float 238 disposed inside the tank 20 is further connected to the pilot valve 234.

  When the manual lever 236 is operated by the user of the flush toilet apparatus FT, the operation is transmitted to the pilot valve 234 via the transmission mechanism 237, and the pilot valve 234 is opened. As a result, the main valve 233 is opened, and water flows from the water supply pipe 231 toward the jet pump unit 300. As will be described later, the water flowing toward the jet pump unit 300 is supplied to the water conduit 130 as cleaning water together with the water stored in the tank 20. For this reason, the water level inside the tank 20 gradually decreases.

  Even after the cleaning of the bowl part 110 is completed, the main valve 233 is not closed, and water continues to flow from the water supply pipe 231 toward the jet pump unit 300. The water that flows toward the jet pump unit 300 is supplied into the tank 20 and stored for the next cleaning. When water is supplied to the inside of the tank 20 (water injection into the tank 20), the water level inside the tank 20 gradually rises. The float 238 connected to the pilot valve 234 inside the tank 20 rises as the water level rises, whereby the pilot valve 234 is closed.

  Thus, when the water level inside the tank 20 rises, the pilot valve 234 is closed by the change in buoyancy that the float 238 receives. When the pilot valve 234 is closed, the main valve 233 is closed, and the supply of water from the water supply pipe 231 to the jet pump unit 300 is stopped. At this time, the arrangement of the float 238 is adjusted so that the amount of water stored in the tank 20 becomes a necessary amount for the next cleaning (so as to reach a predetermined full water level). .

  The jet pump unit 300 is for inducing a jet pump action by the water supplied from the water supply pipe 231 and thereby supplying water toward the water conduit 130. The jet pump unit 300 includes a nozzle 310 and a throat pipe 320.

  The nozzle 310 is a tube having one end connected to the vacuum breaker 235 via a connecting tube 239 and the other end formed with an injection port 311. The nozzle 310 is disposed in the vicinity of the bottom wall 221 of the second tank unit 220. When the main valve 233 is opened, the water supplied from the water supply pipe 231 flows through the connection pipe 239, reaches the nozzle 310, and is injected from the injection port 311 as a high-speed water flow. The nozzle 310 is disposed at the rear side and right corner (corner in top view) of the second tank portion 220. As shown in FIG. 3, the nozzle 310 is U-shaped, and its downstream side is folded from the corner. The injection port 311 has an injection direction directed toward the inside of the throat pipe 320.

  The throat pipe 320 is a pipe having a circular cross section, and is disposed inside the tank 20 with a part thereof passing through an opening 212 formed in the bottom wall 211. One end of the throat pipe 320 is connected to the inlet 131 of the water conduit 130, and a suction port 321 that is an opening is formed at the other end. In the throat pipe 320, a portion on the inlet 131 side of the water conduit 130 is along the vertical direction, and a portion on the suction port 321 side is inclined with respect to the horizontal plane. For this reason, the whole becomes an inverted U shape. As shown in FIG. 2, the throat pipe 320 is disposed inside the tank 20 in a state inclined with respect to the front-rear direction in a top view.

  The specific shape of the throat pipe 320 will be described in more detail. The throat pipe 320 is disposed on the rising portion 322 extending obliquely upward from the suction port 321, the bent portion 323 disposed on the downstream side (upper side) of the rising portion 322, and the downstream side (lower side) of the bent portion 323. And a descending portion 324 extending downward from the bent portion 323.

  The throat pipe 320 is provided with an overflow pipe 330 in the descending part 324 that guides the water in the tank 20 to the water conduit 130 when the water in the tank 20 exceeds the full water position and becomes an abnormal water level when storing the water in the tank 20. Yes.

  The ascending portion 322 is a cylindrical tube having a uniform tube diameter as a whole, and is disposed in an inclined state with respect to the horizontal plane. The suction port 321 is formed at the lower end of the rising portion 322. The suction port 321 is formed so that the entire edge is along a horizontal plane (in parallel with the horizontal plane).

  The descending portion 324 is a cylindrical tube having a uniform tube diameter as a whole, and is disposed along the vertical direction. The tube diameter of the descending part 324 is larger than the tube diameter of the ascending part 322. The tube diameter on the rising portion 322 side of the bent portion 323 is equal to the tube diameter of the rising portion 322. Further, the tube diameter of the bent portion 323 on the descending portion 324 side is equal to the tube diameter of the descending portion 324. For this reason, it can be said that the ascending portion 322 and the descending portion 324 having different tube diameters are smoothly connected by the bent portion 323.

With reference to FIGS. 4 to 6, the flow of water passing through the inside of the throat pipe 320 and the suppression of air accumulation generated inside the throat pipe 320 will be described.
FIG. 4 is a schematic diagram in which water sprayed from the nozzle 310 passes through the throat pipe 320 to the bent portion 323. FIG. 5 is a schematic diagram when water passing through the inside of the throat pipe 320 passes through the descending portion 324. FIG. 6 is a schematic diagram when an air pocket generated inside the throat pipe 320 is discharged.

As shown in FIG. 4, when the throat pipe 320 is viewed from a position where it looks like an inverted U shape, the bent portion 323 has a curved surface having a large curvature as a first curved surface 325 (a curved surface below the bent portion 323) and a first curved surface. A second curved surface 326 (a curved surface on the upper side of the bent portion 323) having a smaller curvature than the one curved surface 325 is provided.
Further, the throat pipe 320 includes a first descending portion 327 having a descending portion 324 on the first curved surface 325 side, and a second descending portion 328 having a descending portion 324 on the second curved surface 326 side.

  In the throat pipe 320 of FIG. 4, an air reservoir that suppresses the occurrence of air accumulation due to separation of the inner wall of the throat pipe 320 and water due to the passage of water passing through the inside of the throat pipe 320 through the bent portion 323. Suppression means 500 is provided.

  The air accumulation suppressing means 500 includes a traveling direction changing unit 510 that suppresses the accumulation of air by changing the traveling direction of the water passing through the throat pipe 320. The first descending portion 327 and the throat pipe 320 are provided so as to protrude inward.

  As shown in FIG. 4, the water sprayed from the nozzle 310 toward the inside of the throat pipe 320 induces a jet pump action and enters the inside of the throat pipe 320. The flow velocity distribution of water when passing through the ascending portion 322 proceeds with a substantially uniform flow velocity distribution (broken line). After passing through the ascending portion 322, it passes through the bent portion 323, but centrifugal force acts on the water passing through the bent portion 323 so that the flow rate on the second curved surface 326 side is higher than the flow velocity on the first curved surface 325 side. It will go faster. As the flow velocity on the second curved surface 326 side is increased, water and the inner wall of the throat pipe 320 are separated on the first curved surface 325 side, and an air pocket is generated.

  The flow of water passing through the descending part 324 as shown in FIG. 5 will be described. By providing the traveling direction changing unit 510 on the first curved surface 325 side where air accumulation occurs, the area where air accumulates can be narrowed. In addition, the flow of water reattached to the wall surface of the traveling direction changing unit 510 is changed in the traveling direction along the wall surface of the traveling direction changing unit 510.

  As shown in FIG. 6, due to the flow of water reattached to the wall surface of the traveling direction changing unit 510, the air pool generated on the downstream side of the first curved surface 325 is discharged so as to be pushed downstream.

  By providing the traveling direction changing unit 510 in the first descending portion 327 of the throat pipe 320 in this way, an air reservoir generated inside the throat pipe 320 can be discharged, and the moment of water supplied to the toilet body 10 It can suppress that a flow rate falls.

  Subsequently, a flush toilet apparatus FTa according to a second embodiment of the present invention will be described. The flush toilet apparatus FTa is different from the flush toilet apparatus FT in the air pool suppression means 500a provided in the throat pipe 320a, but the other configuration is the same as the flush toilet apparatus FT. For this reason, below, the description is abbreviate | omitted about the structure which is common in flush toilet apparatus FT.

  As shown in FIG. 7, the traveling direction changing portion 510a of the air accumulation suppressing means 500a is provided so as to protrude in the inner side of the throat pipe 320a at the second descending portion 328a of the throat pipe 320a.

  With reference to FIGS. 7 to 9, the flow of water and the air reservoir passing through the inside of the throat pipe 320a will be described.

As shown in FIG. 7, water jetted from the nozzle 310a toward the inside of the throat pipe 320a induces a jet pump action and enters the inside of the throat pipe 320a. The flow velocity distribution of water when passing through the ascending portion 322a proceeds with a substantially uniform flow velocity distribution. After passing through the ascending portion 322a, it passes through the bent portion 323a. Centrifugal force acts on the water passing through the bent portion 323a, so that the flow rate on the second curved surface 326a side is higher than the flow rate on the first curved surface 325a side. It will go faster. When the flow velocity on the second curved surface 326a side is increased, water and the inner wall of the throat pipe 320a are separated on the first curved surface 325a side, and an air pocket is generated.

The flow of water passing through the descending part 324a as shown in FIG. 8 will be described. By providing the second descending portion 328a with a traveling direction changing portion 510a for changing the traveling direction of the water passing through the inside of the throat pipe 320a on the first curved surface 325a side where the air pool is generated, the inside of the throat pipe 320a is provided. The direction of travel of the water passing therethrough can be changed from the second descending portion 328a side to the first descending portion 327a side where air accumulation has occurred.

As shown in FIG. 9, the air can be discharged from the throat pipe 320a by pushing the air downstream with the water flowing from the second descending portion 328a side toward the first descending portion 327a side.

  By providing the traveling direction changing portion 510a in the second descending portion 328a of the throat pipe 320a in this way, an air reservoir generated inside the throat pipe 320a can be discharged, and the moment of water supplied to the toilet body 10a It can suppress that a flow rate falls.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 10,10a: Toilet bowl main body 101: Upper surface 110: Bowl part 120: Rim part 130: Water conveyance path 131: Inlet 132: First water conveyance path 133: Water discharge part 134: Second water conveyance path 135: Water discharge part 140: Drain trap pipe Path 141: Ascending channel 142: Down channel 20: Tank 201: Upper lid 210: First tank part 211: Bottom wall 212: Opening 213: Front side wall surface 214: Left side wall surface 220: Second tank unit 221: Bottom wall 2311: Water supply pipe 232: Constant flow valve 233: Main valve 234: Pilot valve 235: Vacuum breaker 236: Manual lever 237: Transmission mechanism 238: Float 239: Connection pipe 240: Bulkhead 241: Open / close window 260: Small tank 300: Jet pump unit 310, 310a: nozzle 311: injection port 320, 320a: throat pipe 321 : Suction port 322, 322a: ascending portion 323, 323a: bent portion 324, 324a: descending portion 325, 325a: first curved surface 326, 326a: second curved surface 327, 327a: first descending portion 328, 328a: second descending Portions 330, 300a: Overflow pipes 500, 500a: Air accumulation suppression means 510, 510a: Travel direction changing section FT, FTa: Flush toilet device SW: Drain pipe WT: Sealed water

Claims (4)

A flush toilet device for washing the toilet body with wash water,
A toilet body having a bowl portion for receiving filth, and a water conduit for guiding water supplied as washing water to the bowl portion;
Water stored inside, a tank disposed at the upper rear side of the toilet body so that the water can be supplied to the inlet of the water conduit,
A jet pump unit disposed inside the tank,
The jet pump unit is
A throat pipe having one end connected to the inlet of the water conduit and the other end formed with a suction port;
A nozzle that induces a jet pump action by injecting high-speed water from the suction port toward the inside of the throat pipe, and
The throat pipe is
An ascending portion extending upward from the suction port;
A bent portion disposed downstream of the rising portion;
A lowering portion that is disposed on the downstream side of the bent portion and extends downward from the bent portion, and is formed to have an inverted U-shape as a whole,
Further, the throat pipe has an air pool suppressing means for suppressing an air pool generated at the descending portion of the throat pipe when supplying water inside the tank to the water conduit. Urinal device.   The flush toilet apparatus according to claim 1, wherein the air pool suppressing means includes a traveling direction changing unit that changes a traveling direction of water passing through the throat pipe in the descending unit. When the throat tube is viewed from a position where it looks like an inverted U shape,
The bent portion has a first curved surface and a second curved surface having a smaller curvature than the curvature of the first curved surface,
In the case where the wall surface of the descending portion downstream from the first curved surface is a first descending portion, and the wall surface of the descending portion downstream from the second curved surface is a second descending portion,
The flush toilet apparatus according to claim 2, wherein the traveling direction changing unit is provided in the first descending unit. When the throat tube is viewed from a position where it looks like an inverted U shape,
The bent portion has a first curved surface and a second curved surface having a smaller curvature than the curvature of the first curved surface,
In the case where the wall surface of the descending portion downstream from the first curved surface is a first descending portion, and the wall surface of the descending portion downstream from the second curved surface is a second descending portion,
The flush toilet apparatus according to claim 2, wherein the traveling direction changing portion is provided in the second descending portion.

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