JP6358556B2 - Flush toilet equipment - Google Patents

Description

  The present invention relates to a flush toilet apparatus that discharges filth to a drain pipe with washing water.

  Conventionally, as a method for supplying wash water to the bowl portion of the flush toilet device, water is supplied from a tank placed at a high place using the potential energy of the water stored in the tank ( Tank type) is known.

  However, in a tank-type flush toilet apparatus, if an attempt is made to ensure the cleaning power and the discharge power of filth, the amount of water supplied to the bowl portion increases, and therefore the capacity of the tank must be increased. Therefore, the size of the tank must be increased, and it is difficult to improve the design of the flush toilet device.

  In order to reduce the size of the tank, recently, a flush toilet apparatus in which washing water is supplied to the bowl portion by a jet pump has been proposed. For example, a flush toilet apparatus described in Patent Document 1 below includes a tank that stores water, and a jet pump unit is disposed inside 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, 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.

  Further, not only water jetted from the jet nozzle but also water stored in the tank is drawn and flows through the throat pipe, so that water is supplied to the bowl portion at a high flow rate and at a high flow rate. . As described above, in the flush toilet apparatus of the type in which wash water is supplied by a jet pump, the total amount of wash water supplied to the bowl portion is equal to the amount of water stored in the tank, and the water jetted from the nozzle. It is almost equal to the amount added. For this reason, the amount of water that needs to be stored in the tank is smaller than that of the conventional tank type, and the tank can be miniaturized. In addition, since high-flow and high-flow-rate water is supplied to the bowl, high cleaning power and filth discharge power can be demonstrated. In this respect as well, the total amount of cleaning water can be reduced and the tank can be downsized and high-designed. Can provide sex toilets.

  Moreover, in the flush toilet apparatus described in the following Patent Document 1, in order to reduce the overall size of the flush toilet apparatus, a tank is disposed on the upper rear side of the toilet body, thereby the flush toilet apparatus. The dimensions in the front-rear direction are reduced. In this case, since water is supplied from the bottom surface of the tank to the toilet body, the throat pipe is formed to have an inverted U shape when viewed from the front.

  In addition, in order to further reduce the size of the flush toilet apparatus in the front-rear direction, the throat pipe is disposed sideways in a top view, and the throat pipe is disposed in one side space in the left-right direction in the tank, Members other than the throat pipe (such as a water supply pipe or a float that switches between water supply / stop of water from the water supply pipe) are arranged side by side. In the flush toilet apparatus described in Patent Document 1 configured as described above, since the front and rear direction of the flush toilet can be reduced, the design is high, and even in a narrow toilet space, A wider operating space can be secured.

Korean Registered Patent No. 10-0643578

  In the flush toilet apparatus described in Patent Document 1 configured as described above, the design is high by shortening the length of the tank in the front-rear direction, and the length of the flush toilet can be shortened in the narrow toilet space. In addition, an excellent effect that the toilet space can be used effectively can be achieved. However, in the structure of Patent Document 1, there is still room for improvement from the viewpoint of further miniaturization while maintaining high jet pump performance. In reality, in a narrow toilet booth, several centimeters of the width of the tank appears as a significant difference in terms of toilet booth and toilet cleaning, storage of cleaning tools, and toilet and water pipe construction. A few centimeters in the front-rear direction appears as a significant difference in the ease of entering a toilet booth in a wheelchair and the ease of rotation.

  The present invention further improves the cleanability in a narrow toilet booth, the storage of cleaning tools, the construction of toilets and water supply pipes, the ease of entering a toilet booth in a wheelchair and the ease of rotating operation. In order to provide a highly-designed jet pump type flush toilet device, the structure and arrangement of the jet pump unit built in the tank can be optimized to the limit, and the tank can be miniaturized to the limit. A toilet device is provided.

In order to solve the above-mentioned problems, a flush toilet apparatus according to the present invention is a flush toilet apparatus that discharges filth to a drain pipe with washing water, and has a bowl portion for receiving the filth, as washing water A toilet main body in which a water conduit for guiding the water to be supplied to the bowl portion is formed, and water is stored 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, wherein the inlet of the water conduit is a rear end portion of the toilet body and a lateral direction. The tank is provided in a central portion so as to cover the inlet of the water conduit from above, and an opening is formed in the central portion of the bottom wall of the tank facing the inlet of the water conduit. Placed in The jet pump unit has an inverted U-shape in which one end passes through the opening and is connected to the inlet of the water conduit via a conduit inlet connection provided at the one end, and a suction port is formed at the other end. 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. A valve unit for supplying and blocking water that induces a jet pump action to the nozzle is disposed, and the inverted U-shaped throat pipe includes a vertical throat portion extending substantially vertically upward from the water conduit inlet connection portion. , and an inclined throat portion inclined from該鉛straight throat section to linearly obliquely downward toward the suction port, the upper side of the inclined throat portion within said tank, When viewed in a rear direction, lateral widened toward the inner peripheral surface of one side and the delta space widened toward the inner peripheral surface of the upper side of the tank in the tank is formed, the delta Provided on the upper surface of the inclined throat portion in the space is a supply flow rate reducing valve that introduces air into the throat pipe when the water level in the tank drops to a predetermined water level and reduces the water supply flow rate to the bowl portion. It is characterized by that.

  In the flush toilet apparatus according to the present invention, the inlet of the water conduit is provided at the rear end of the toilet body and the central portion in the lateral direction. In addition, one end of the inverted U-shaped throat pipe passes through the opening formed in the central portion of the tank bottom wall at the inlet of the conduit, and through the conduit inlet connection provided at the one end. It is connected. Therefore, when arranging the water inlet for connecting the throat pipe to the toilet body, it is only necessary to provide it at the center of the rear end of the toilet body, so there is no need to enlarge the toilet body in the width direction. The body can be made smaller. In addition, the throat pipe needs to be long enough to ensure the performance of the jet pump, but even if the length of the throat pipe is increased, the waterway entrance is provided in the center in the lateral direction, so the toilet bowl The body does not grow. In other words, since the toilet body is not affected, the length of the throat pipe can be made sufficiently long, and high jet pump performance ensures high cleaning and drainage performance, reducing the total water volume and downsizing the tank. Can be achieved.

  Furthermore, in the flush toilet apparatus according to the present invention, a supply flow rate reducing valve for reducing the flow rate of supplying air to the toilet bowl by supplying air to the throat pipe when a predetermined intermediate water level is reached is newly added. did. This is to achieve high toilet flushing performance and high wastewater drainage performance to the drainage pipes under the high water-saving performance that is indispensable for realizing a small tank. Specifically, at the start of water supply to the bowl part, it is desirable to set a large flow rate and a large flow rate so that a high detergency can be exhibited in order to clean the filth adhering to the bowl part. When pursuing a small tank, the total amount of water that can be supplied into the bowl is limited. Therefore, at the beginning of supply, a higher flow rate and flow rate can be used to achieve higher cleaning performance. However, when such a high flow rate and high flow rate are used, if the flow rate and flow rate are maintained, the water supply into the bowl is completed in a very short time. Then, this time, the filth and paper that you want to drain from the toilet body cannot be successfully drained from the toilet body, or the filth and paper stagnate in the drain pipe, that is, a new problem from the viewpoint of filth transportability Occurred. By providing a supply flow rate reduction valve for this problem, the flow rate and flow rate are optimally reduced during the latter half of the water supply period necessary for filth transfer even if the water supply is initially set to a very high flow rate and flow rate. Therefore, the conveyance time can be secured and the filth conveyance performance can be extremely high.

  Furthermore, the present inventor improved the valve unit for supplying water to the nozzle, or provided a new electric dedicated valve or a mechanical valve with a float when incorporating a new functional part called the supply flow rate reducing valve. Since the size of the tank cannot be reduced, if the water level in the tank decreases, air can be introduced into the throat pipe without permission, so that the jet pump action will naturally decrease and the flow rate and flow rate can be reduced. Finding and adopting the knowledge that This makes it possible to reduce the size of the tank with a simple configuration in which air is sucked by a suction action caused by a water flow flowing in the throat pipe when the water level in the tank is simply lowered without providing an expensive valve requiring a large arrangement space. be able to.

Further, in the present invention, the inverted U-shaped throat pipe is linearly inclined downwardly from the vertical throat part to the suction port of the throat pipe, extending vertically upward from the conduit inlet connection part. When the supply flow rate reduction valve is viewed in the front-rear direction above the inclined throat portion in the tank, it goes to the inner peripheral surface on one side in the horizontal direction in the tank. It is provided on the upper surface of the inclined throat portion in the delta space which becomes wider as it goes to the inner peripheral surface on the upper side in the tank . By configuring the throat pipe in this manner, the jet pump performance can be more reliably ensured and the delta space can be used effectively, so that the tank can be further miniaturized.

  In the flush toilet apparatus according to the present invention, it is also preferable that the supply water amount reducing valve is fixed to the inclined throat portion so that the height can be adjusted so that the water level for introducing air can be changed.

  In this preferred embodiment, a new problem born in the realization of a small tank is further solved with a simple configuration. Specifically, the large flow rate and large flow rate required at the beginning of the water supply into the bowl depend on the water pressure injected from the nozzle. Also, the amount of water and the flow rate required for cleaning vary depending on the shape of the toilet body. In response to this problem, this problem can be solved with a simple configuration in which a supply water amount reducing valve is provided for the inclined throat portion so that the height can be adjusted. In addition, by configuring a delta space and providing a water supply amount reduction valve on the upper surface of the throat pipe in this space, a sufficient space can be secured for the above height adjustment, so workability is very high, There is an excellent practical effect that the height can be adjusted accurately.

  Moreover, in the flush toilet apparatus which concerns on this invention, it is also preferable that the said supply water amount reduction valve is comprised so that adjustment of the air introduction flow rate is possible.

  In this preferred embodiment, since the air introduction flow rate can be adjusted, the flow rate of water supplied to the bowl portion can be reduced to a flow rate suitable for various toilet bodies having different shapes and the like. In addition, by configuring a delta space and providing a supply water amount reduction valve on the upper surface of the throat pipe in this space, it is possible to secure a sufficient space for adjusting the air introduction flow rate, so the workability is very high, In addition, there is a practically excellent effect that the air introduction flow rate can be accurately adjusted.

  According to the present invention, in a flush toilet apparatus in which flush water is supplied to a bowl portion by a jet pump, the jet pump performance is extremely high, and yet a tank with a built-in jet pump unit is made compact at an unprecedented level. It is possible to realize the cleaning performance in a narrow toilet booth, the storage capability of cleaning tools, the ease of installing toilets and water pipes, the ease of entering the toilet booth in a wheelchair and the ease of rotating operation at a very high level. An excellent flush toilet apparatus was able to be provided. In addition, the present invention has provided an excellent jet pump type flush toilet apparatus that does not sacrifice the washing performance and the waste transporting performance even when water is saved in a small tank.

It is a perspective view of the flush toilet device which concerns on embodiment of this invention. It is sectional drawing which shows the flush toilet apparatus shown in FIG. It is a top view of the flush toilet apparatus shown in FIG. It is a rear view which shows the structure in the inside of the tank of the flush toilet apparatus shown in FIG. It is a top view which shows typically the structure in the inside of the tank of the flush toilet apparatus shown in FIG. It is a schematic diagram showing the flow-path switching mechanism and flow-path switching operation | movement of the flush toilet apparatus shown in FIG. It is a schematic diagram showing a mode that water is discharged from the refill piping of the flush toilet apparatus shown in FIG. It is a schematic diagram showing the air introduction pipe | tube of the flush toilet apparatus shown in FIG.

  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 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a flush toilet apparatus FT. FIG. 2 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. 3 is a top view of the flush toilet apparatus FT. In FIG. 3, in order to show the internal structure of the tank 20 described later, a state in which the upper lid 201 of the tank 20 is removed is illustrated. FIG. 4 is a rear view showing the inside of the tank 20 when the flush toilet apparatus FT is viewed from the rear side.

  As shown in FIGS. 1 to 4, the flush toilet apparatus FT includes a toilet body 10 and an upper surface 101 of the toilet body 10 on the rear side (right side in FIG. 2, upper side in FIG. 3) of the toilet body 10. And a tank 20 installed in the vehicle. Further, a local cleaning device 2 for cleaning a user's local part, and a toilet seat and a toilet lid 1 (not shown) are installed on the upper surface in front of the tank 20 of the toilet body 10. The flush toilet device FT is a device that receives filth by the toilet body 10 and discharges the filth to a drain pipe (not shown) with water (wash water) supplied from the tank 20.

  In the following description, unless otherwise specified, the right side (left side in FIG. 3) 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. The left side as viewed from the user in the state is referred to as “left side” (right side in FIG. 3). Further, the front side (left side in FIG. 2, lower side in FIG. 3) 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. 2 and the upper side in FIG. 3) as viewed from the user in the 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 as shown in FIG. 2, the rim portion 120 has a shape in which a part of the inner surface of the bowl portion 110 is retracted toward the outer peripheral side. 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 (lateral 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 the water outlet 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 outlet 133 and supplied to the rim portion 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 the water outlet 135. 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 outlet 135 and supplied to the rim portion 120.

  The direction in which water is ejected from the outlet 133 is a direction along the circumference of the rim portion 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 outlet 135 is also a direction along the circumference of the rim portion 120 formed as a substantially circular flow path, and is also a counterclockwise direction when viewed from above. For this reason, water spouted from the outlet 133 and the outlet 135 to the rim portion 120 flows down from the entire rim portion 120 toward the bowl portion 110 while swirling counterclockwise along the rim portion 120 and flowing. .

  The drain trap pipe 140 is a flow path that connects the lower end of the bowl part 110 and a drain pipe (not shown). 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 portion of the bowl portion 110 to the lower portion of the ascending flow path 141, and the sealed water WT is formed by the stored water. A drain pipe (not shown) is connected to the lower end of the descending flow path 142. The drain pipe is a pipe arranged inside the building, and its downstream end is connected to the sewer pipe.

  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 through the ascending channel 141 and the descending channel 142. As a result, a downward flow occurs in the water (sealed water WT) stored at the bottom of 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 water toward a drain pipe (not shown).

  The tank 20 is a container in which water is stored, and supplies the water to the inlet 131 of the water conduit 130. As shown in FIG. 4, the tank 20 includes a first tank portion 210 and a second tank portion 220 (concave portion) formed so as to extend a part of the bottom wall 211 of the first tank portion 210 downward. doing. 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 part 220 is connected to the left part of the bottom wall 211 of the first tank part 210. In other words, the second tank part 220 forms a recess in which the left part of the bottom wall 211 of the first tank part 210 protrudes downward.

  The bottom wall 211 of the first tank part 210 (the part on the right side of the second tank part 220) is in a state of being close to the rear part of the upper surface 101 of the toilet body 10 from above. Specifically, an inlet 131 is formed in the upper surface 101 of the rear end portion 150 and the central portion 151 of the toilet body 10, but the bottom wall 211 of the first tank portion 210 extends around the inlet 131 from above. It is in the state which approached from the upper part with respect to the upper surface 101 of the toilet bowl main body 10 so that it might cover. In addition, an opening 212 having substantially the same shape as the inlet 131 is formed in the central portion 213 of the bottom wall 211, and the opening 212 and the inlet 131 overlap each other when viewed from above (see FIG. 2). 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.

  The width of the toilet body 10 in the left-right direction is such that when the first tank 210 is arranged as described above, the second tank 220 does not interfere with the upper surface of the toilet body 10, Are formed small. In other words, it is formed so that open spaces are provided on the left and right of the entrance 131 of the toilet body 10. Therefore, the bottom wall 221 of the second tank portion 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 tank 20 is positioned in front of the rear end portion of the toilet body 10 and the lower end portion of the tank 20 is below the upper surface of the toilet body 10. Located on the side. 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.

  In addition, since only the second tank portion 220 of the tank 20 is installed below the upper surface of the toilet body 10, the water head stored in the tank 20 is maintained. As a result, while the downsizing of the flush toilet apparatus FT as described above is realized, the performance of the jet pump unit 300 described later (performance of supplying a predetermined amount and a predetermined flow of water toward the rim portion 120). Is maintained.

  Next, the internal configuration of the tank 20 will be described with reference to FIGS. FIG. 5 is a top view schematically showing the inside of the tank 20 of the flush toilet apparatus FT. Inside the tank 20, a water supply pipe 231, a valve unit VU, and a jet pump unit 300 are arranged. In this embodiment, the valve unit VU includes a main valve 233 and a pilot valve 234.

  The water supply pipe 231 is a pipe for supplying water toward the main valve 233, and is arranged so as to extend vertically upward from the bottom wall 211 of the first tank unit 210. The water supply pipe 231 is piped from below the tank 20 through the open space on the right side of the toilet body 10. One end of the water supply pipe 231 is connected to a water pipe (not shown) outside the tank 20. The other end (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 right side of the center in the left-right direction. A cylindrical cover 280 is provided so as to extend vertically upward from the right side of the bottom wall 211 of the tank 20, and the water supply pipe 231 is inserted through the cylindrical cover 280.

  A constant flow valve (not shown) is disposed in the middle of the water supply pipe 231 (between the water pipe and the main valve 233). When the main valve 233 is open, the flow rate of water flowing into the main valve 233 is constant by the constant flow valve, and does not vary with the water pressure of 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, even when the tank 20 is full, the vacuum breaker 235 is not submerged.

  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 flush lever 236 disposed outside the tank 20 is connected to the pilot valve 234 via an operating force 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. The pilot valve 234 is configured to be closed when the float 238 reaches a predetermined height, and is open when the float 238 is at a position lower than the predetermined height.

  When the flush lever 236 is operated by the user of the flush toilet apparatus FT, the operation is transmitted to the pilot valve 234 via the operating force 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. The water flowing toward the jet pump unit 300 is supplied to the water conduit 130 as washing 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 portion 110 is completed, the float 238 is in a lowered state, so 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. 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). .

  A flash lever return mechanism 232 having a built-in spring for returning the angle of the operated flash lever 236 to the original angle is provided at a position adjacent to the flash lever 236 across the side wall of the tank 20. In the present embodiment, the flash lever 236 and the flash lever return mechanism 232 are collectively referred to as a flash lever unit FU.

  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 pipe having one end connected to the vacuum breaker 235 via the nozzle water supply pipe 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 nozzle water supply pipe 239, reaches the nozzle 310, and is injected from the injection port 311 as a high-speed water flow. The nozzle 310 is arrange | positioned at the 2nd tank part 220, as shown in FIG.4 and FIG.5. In the state shown in FIGS. 4 and 5, the injection direction of the injection port 311 is directed to the inside of the throat pipe 320. More specifically, it is directed to the inside of an inclined throat portion 330 of a throat pipe 320 described later. The nozzle water supply pipe 239 is made of an elastic member made of rubber and has high flexibility. On the other hand, the nozzle 310 is made of a highly rigid resin member.

  The throat pipe 320 is a pipe having a circular cross section, and is disposed inside the tank 20 in a state of passing through an opening 212 formed in the bottom wall 211 as shown in FIG. One end side of the throat pipe 320 is provided with a water conduit inlet connection portion 353, and this water conduit inlet connection portion 353 is not directly connected to the inlet 131 of the water conduit 130, but the water conduit It is connected to be inserted with a predetermined gap with respect to the inner peripheral surface of the inlet 131 of 130, and a suction port 331 which is an opening is formed at the other end. Of course, the water conduit inlet connection portion 353 may be directly connected to the inlet 131 of the water conduit 130. 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 331 side is inclined with respect to the horizontal plane. For this reason, the whole becomes an inverted U shape. As shown in FIG. 3, 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.

  Here, the specific shape of the throat pipe 320 and the arrangement in the tank 20 will be further described. As shown in FIG. 4, the throat pipe 320 includes an inclined throat portion 330, a bent throat portion 352, and a vertical throat portion 351.

  The inclined throat portion 330 is a portion of the throat pipe 320 on the suction port 331 side, and is a portion that is arranged in an inclined state with respect to the horizontal plane as described above. The inclined throat portion 330 is a cylindrical tube whose tube diameter is substantially uniform throughout. A suction port 331 that is an opening is formed at the lower end of the inclined throat portion 330. The inclined throat portion 330 can also be referred to as a portion (first straight portion) formed to extend linearly from the suction port 331 obliquely upward.

  The suction port 331 is formed so that the entire edge thereof is along a surface inclined with respect to the central axis of the inclined throat portion 330. In the state shown in FIG. 4, the edge of the suction port 331 is in a horizontal plane. Along. That is, the edge of the suction port 331 is parallel to the water surface in the tank.

  The vertical throat portion 351 is a portion of the throat pipe 320 on the side of the water conduit inlet connection portion 353. The vertical throat portion 351 extends linearly upward from the water conduit inlet connection portion 353.

  The bent throat portion 352 is configured to bend from the upper end of the vertical throat portion 351 toward the inclined throat portion 330.

  In the present embodiment, since the dimensions of the tank 20 in the front-rear direction are shortened, the throat pipe 320 is arranged so that its central axis is substantially along the left-right direction when viewed from above. Further, the suction port 331 is disposed in the vicinity of the left end of the inside of the tank 20. Since the throat pipe 320 and its suction port 331 are arranged in this way, the throat necessary for efficiently generating the jet pump action despite the fact that the dimension along the front-rear direction of the tank 20 is reduced. The flow path length of the tube 320 is ensured.

  More specifically, as shown in FIGS. 4 and 5, the inclined throat portion 330 has a central axis inclined with respect to the front-rear direction in the top view and also inclined with respect to the horizontal plane in the rear view. Yes. For this reason, in the limited space of the tank 20, the flow path length of the inclined throat part 330 is ensured as long as possible. In other words, a linear flow path (a flow path on the upstream side of the bent throat portion 352) that is an upstream portion of the throat pipe 320 is secured as long as possible.

  For this reason, the water flowing inside the inclined throat portion 330 has a uniform flow velocity distribution in the cross section of the flow channel until it reaches the bent throat portion 352. As a result, when water reaches the bent throat portion 352, a flow that separates from the wall surface of the flow path or a stagnation vortex inside the bent throat portion 352 is suppressed. A decrease in jet pump performance due to the shape of the throat pipe 320 is suppressed, and a smooth water flow inside the throat pipe 320 is ensured. Since the throat pipe 320 is configured as described above, as shown in FIG. 4, the tank 20 is surrounded by the delta space D (indicated by a one-dot chain line in FIG. 4) above the inclined throat portion 330. Space) is formed. The delta space D is a space formed by the upper surface side of the inclined throat portion 330 and the inner wall of the tank 20. Further, a flow path 255 through which water flows in the left-right direction of the tank is formed between the rear side surface of the throat pipe 320 and the rear side wall of the tank 20.

  As is clear from FIG. 4, the throat pipe 320 has an angle formed by the central axis of the vertical throat portion 351 (second straight portion) with respect to the vertical direction (in this embodiment, 0 degree). It arrange | positions in the tank 20 so that the central axis of the inclination throat part 330 (1st linear part) may become smaller than the angle which it makes with respect to a perpendicular direction.

  With such a configuration, regarding the length along the front-rear direction, the length of the inclined throat portion 330 (first straight portion) is longer than the length of the vertical throat portion 351 (second straight portion). . For this reason, most of the limited space in the tank 20 is effectively utilized as a space for securing the length of the inclined throat portion 330 necessary for efficiently generating the jet pump action. That is, the length of the inclined throat portion 330 (first straight portion) is sufficiently secured while the entire throat pipe 320 is arranged in the small tank 20.

  For this reason, the distribution of the flow velocity in the cross section of the water flowing inside the inclined throat portion 330 is sufficiently uniformed before reaching the bent throat portion 352, so that stagnation vortices are generated inside the throat pipe 320. Occurrence and interference of the inner surface of the throat pipe 320 with a local high-speed water flow are suppressed. As a result, the resistance of the water flow in the throat pipe 320 is suppressed, and the decrease in the efficiency of the jet pump action is suppressed, so that it is possible to efficiently increase the flow rate and supply water to the water conduit 130. Yes.

  Further, the suction port 331 is disposed inside the second tank portion 220. As a result, the suction port 331 which is the lower end of the inclined throat portion 330 is disposed at a position overlapping the second tank portion 220 in a top view. In other words, a part of the bottom wall of the tank 20 is extended downward on the lower side of the suction port 331.

  Since it is such a structure, it is possible to arrange | position the suction port 331 below further and to ensure further sufficient length of the inclination throat part 330 (1st linear part). Further, the nozzle 310 is disposed in a space below the suction port 331 in the tank 20, but the inside of the second tank portion 220 is used as a space for that purpose. In other words, in order to dispose the nozzle below the suction port 331, the inclined throat portion 330 (first straight portion) need not be shortened.

  In the present embodiment, the suction port 331 is disposed inside the second tank unit 220, but the suction port 331 may be disposed at a position higher than the upper end of the second tank unit 220. Even in this case, it is desirable to arrange the suction port 331 at a position overlapping the second tank portion 220 in a top view.

  The suction port 331 is formed so that the whole edge is along a horizontal plane. It can be said that the suction port 331 having such an edge is an opening formed when the end of the throat pipe 320 is cut along a horizontal plane.

  In the suction port 331 formed in this way, the height of the upper end of the edge is the same as the height of the lower end of the edge, so that a space sandwiched between the two, that is, the nozzle 310 is disposed. There is no space to store wasted water even though it cannot. Therefore, the inclined throat portion 330 can be extended downward so that the upper end of the suction port 331 approaches the vicinity of the nozzle 310. As a result, even though the tank 20 is downsized, most of the water stored in the tank 20 is effectively used as cleaning water (reducing the amount of wasted water), and the jet pump action It is possible to ensure a sufficient cleaning time and to exhibit high cleaning performance.

  In addition, by forming the suction port 331 as described above, the level of water stored in the tank 20 is reduced while preventing air from flowing into the throat pipe 320 from the suction port 331. It is possible to reduce it to the vicinity of 331. Since the water stored in the tank 20 is used without waste, the tank 20 can be further downsized.

  Further, as shown in FIG. 4, the throat pipe 320 introduces air from the outside of the throat pipe 320 into the throat pipe 320 when water flows through the throat pipe 320 above the inclined throat portion 330. Air inlet pipe 340 (supply flow rate reducing valve). The air introduction pipe 340 is for reducing the flow rate of the supplied cleaning water at a stroke from the middle when supplying the cleaning water when the water in the tank 20 is supplied to the bowl portion 110 through the throat pipe 320.

  As described above, when the cleaning water is supplied to the bowl portion 110 by providing the air introduction pipe 340, if the water level in the tank 20 falls below the air introduction hole 341 provided above the air introduction pipe 340, the cleaning is performed. Inside the throat pipe 320 through which water is flowing, air is sucked from the air introduction hole 341 by the flow of water in the throat pipe 320, and the supply flow rate of the wash water can be reduced at a stroke from the middle of the supply of the wash water.

  The air introduction pipe 340 includes an air suction water level adjustment mechanism 348 so that the water level at which air starts to be sucked can be changed. Furthermore, the air introduction pipe 340 includes an intake air flow rate adjustment mechanism 349 so that the flow rate of the intake air can be adjusted. Specifically, as shown in FIG. 8, the air introduction tube 340 includes a cylindrical first cylindrical tube 342, a second cylindrical tube 343, and a lid 345. The air introduction hole 341 is formed in the side surface. The inner peripheral surface on the lower side of the second cylindrical tube 343 and the outer peripheral surface on the upper side of the first cylindrical tube 342 extended above the upper surface of the inclined throat portion 330 are respectively threaded. The cylindrical tube 343 is fixed to the first cylindrical tube 342 by screwing. Therefore, the second cylindrical tube 343 can be rotated with respect to the first cylindrical tube 342, and the second cylindrical tube 343 can be moved in the vertical direction, thereby increasing the height of the air introduction hole 341 of the second cylindrical tube 343. It can be adjusted. In this way, by enabling the height of the air introduction hole 341 to be adjusted, the water level at which air starts to be sucked can be changed.

  Further, a lid body 345 having an insertion portion 345 b extending downward in a cylindrical shape is attached to the upper portion of the second cylindrical tube 343 in such a manner that the insertion portion 345 is inserted into the second cylindrical tube 343. The insertion portion 345b of the lid 345 is provided with a notch 345c. By connecting the notch 345c and the air introduction hole 341 of the second cylindrical tube 343, the air introduction tube 340 has an air introduction hole. Air can be introduced from 341. It should be noted that, by picking and rotating the knob 345a provided at the top of the lid 345, the overlapping area between the notch 345c and the air introduction hole 341 can be changed, and the air suction flow rate can be adjusted. Yes.

  The flush toilet apparatus FT includes a flow path switching mechanism 390 below the suction port 331 of the throat pipe 320. FIG. 6 is a schematic diagram schematically showing the flow path switching mechanism 390 and the flow path switching operation. As shown in FIGS. 4 and 6, the flow path switching mechanism 390 includes a float 391 and a shielding member 392 (flow path switching valve). The shielding member 392 is pivotally supported by the nozzle 310 and is configured to be rotatable around the rotation shaft 393. Further, as shown in FIG. 5, the float 391 is disposed at a corner portion 270 formed by the front side wall and the left side wall of the tank 20, and is connected to the shielding member 392 via a connecting member 394. Yes. Based on the operation of the float 391 according to the water level of the tank 20, the flow path switching mechanism 390 is in a state where the water jetted from the jet port 311 of the nozzle 310 is directed toward the inside of the throat pipe 320 and the water is in the tank 20. And a state in which water is poured into the tank 20.

  The flow path switching mechanism 390 performs injection when the water level in the tank 20 drops to a predetermined switching water level when water is supplied to the bowl 110 (when the jet pump action is occurring). The supply destination of the water sprayed from the port 311 can be switched from the inside of the throat pipe 320 to the inside of the tank 20. That is, while the water level in the tank 20 is higher than the switching water level, as shown in FIG. 6A, water is poured into the throat pipe 320, and when the water level in the tank 20 drops to the switching water level, The jet pump action is stopped and water injection into the tank 20 is started as shown in FIG. 6 (B). Specifically, as the water level in the tank 20 decreases, the height of the float 391 also decreases. Therefore, when the float 391 decreases, the coupling member 394 also descends. The shielding member 392 connected to the motor rotates around the rotation shaft 393. By this rotation, the shielding member 392 is positioned between the ejection port 311 and the suction port 331 of the throat pipe 320, and the water ejected from the ejection port 311 of the nozzle 310 collides with the shielding member 392, so that the inside of the tank 20 It is configured to switch to a state where water is supplied to the tank (a state where water is poured into the tank 20).

  The shielding member 392 is closed until the supply of water into the tank 20 is completed, that is, as already described, the water level in the tank 20 rises to the full level, and the pilot valve 234 and the main valve 233 are closed. The above position is maintained by the reaction force of the high-speed water sprayed from the nozzle 310 until the supply of water from the water supply pipe 231 to the jet pump unit 300 is stopped. Yes. In addition, after the injection of water from the injection port 311 is stopped, the float 391 rises and returns to the original height due to the buoyancy received from the water in the tank 20, and the flush toilet device FT enters a standby state. . As shown in FIG. 6, the water sprayed from the injection port 311 collides with the shielding member 392, and then directs the water toward the inner side wall 220 a (side surface on the center side of the tank) of the second tank portion 220. 392 is configured.

  The float 391 has a height adjusting mechanism, and is fixed to the connecting member 394 so that the height can be adjusted. Specifically, a rotating rod 395 having a threaded outer peripheral surface is attached to the connecting member 394 so as to extend in the vertical direction, and the rotating rod 395 and a float having a threaded inner peripheral surface are attached. The float 391 is fixed to the connecting member 394 by screwing the 391. With this configuration, the height of the float 391 can be adjusted by picking the knob 396 of the rotating rod 395 and rotating the rotating rod 395. As described above, since the height of the float 391 can be adjusted, the water level in the tank for switching from the water supply to the throat pipe 330 to the tank water supply can be changed. Accordingly, it is possible to change the amount of water supplied to the bowl portion 110 in one cleaning.

  Since the knob 396 is arranged so that it can be operated from above the tank 20, the height of the float 391 can be adjusted even when the jet pump unit 300 or the like is arranged in the tank 20. Therefore, even if the tank 20 is reduced in size, the amount of water supplied to the bowl portion 110 can be changed without performing a complicated operation such as removing the jet pump unit 300 or the like for height adjustment.

  In addition, the dashed-two dotted line in FIG. 6 represents the central axis of the nozzle water supply piping 239 in which some illustrations are abbreviate | omitted. The nozzle water supply pipe 239 inside the second tank unit 220 is along the rear surface of the second tank unit 220, the side surface 220 b opposite to the center side of the tank 20 of the second tank unit 220, and the front surface of the second tank unit 220. Are arranged.

  Other configurations inside the tank 20 will be described with reference to FIGS. 4 and 5 again. As shown in FIGS. 4 and 5, a partition wall 240 is disposed on the front side inside the tank 20. The partition wall 240 is formed to extend upward from the bottom wall 211. A part of the internal space of the tank 20 is partitioned by the partition wall 240 and the bottom wall 211 of the first tank unit 210 to form a small tank 260. The small tank 260 is a container having an upper portion opened to the inside of the tank 20, and is disposed in the front and right corner of the first tank unit 210.

  In the partition wall 240, an opening / closing window 241 is provided in the vicinity of the lower end portion of the rear partition wall 240 a. The opening / closing window 241 is normally in an open state, and the inside of the small tank 260 communicates with the outside (the space behind the partition wall 240a) through the opening / closing window 241. For this reason, in a state where the bowl part 110 is not washed (standby state), the water level stored in the tank 20 and the water level stored in the small tank 260 are equal.

  The flash lever 236 can be operated in two directions (large direction and small direction). When the flash lever 236 is operated in the large direction, the pilot valve 234 and the main valve 233 are opened while the open / close window 241 is opened. The water stored in the small tank 260 passes through the opening / closing window 241, flows out into the second tank unit 220, and reaches the suction port 331. For this reason, most of the water stored in the tank 20, including the amount stored in the small tank 260, is drawn into the throat pipe 320 and supplied to the rim portion 120.

  On the other hand, when the flash lever 236 is operated in the small direction, the pilot valve 234 and the main valve 233 are opened simultaneously with the opening / closing window 241 being closed. For this reason, the water stored in the small tank 260 out of the water stored in the tank 20 cannot pass through the opening / closing window 241 and remains in the small tank 260. As a result, the amount of water supplied to the rim portion 120 as cleaning water is small. The opening / closing window 241 is opened and closed by a plate-like member 242 (water amount switching valve) whose both ends at the lower end thereof are pivotally supported on the inner surface of the partition wall 240 a, and this plate-like member 242 is located in front of the small tank 260. Configured to rotate sideways. Therefore, when the opening / closing window 241 is in the open state, the other members disposed on the rear side of the partition wall 240a and the plate-like member 242 do not interfere with each other. It can be downsized.

  In the following description, “the water level stored in the tank 20” or “the water level in the tank 20” indicates the water level outside the small tank 260. That is, the water level stored in the space in which the suction port 331 is arranged in the space divided into two by the partition wall 240 is shown. The water level stored in the small tank 260 is not considered in the following description.

  Further, the flush toilet apparatus FT includes an overflow pipe 253. The overflow pipe 253 is formed integrally with the throat pipe 320 so as to cover a part of the side surface of the vertical throat portion 351 of the throat pipe 320. Therefore, the opening on the lower end side of the overflow pipe 253 is configured to be adjacent to the opening on the lower end side of the vertical throat portion 351 of the throat pipe 320 (see FIG. 7). Since the lower end portion of the vertical throat portion 351 of the throat pipe 320 and the lower end portion of the overflow pipe 253 are disposed so as to penetrate the opening 212 of the tank 20, the water flowing in from the overflow hole 254 at the upper end of the overflow pipe 253 Then, the water is supplied to the bowl portion 110 through the water conduit 130.

  Since the flush toilet apparatus FT includes the overflow pipe 253 as described above, even when water is poured into the tank 20, the pilot valve 234 and the like are damaged, and even if the water injection does not stop, When the water level rises to the upper end of the overflow pipe 253, the water in the tank 20 flows into the overflow hole 254 at the upper end of the overflow pipe 253, and the water level in the tank 20 does not rise any further. Therefore, the water level in the tank 20 does not rise to the vicinity of the upper end of the tank 20, and water does not leak from between the tank 20 and the upper lid 201.

  The flush toilet apparatus FT includes a refill water supply mechanism. The refill water supply mechanism includes a refill pipe 250 branched from the nozzle water supply pipe 239. The end portion 250 a of the refill pipe 250 is provided with a water discharge port 251 for discharging refill water, and the water discharge port 251 is configured to discharge water toward the overflow hole 254 of the overflow pipe 253. The refill water is always supplied to the bowl portion 110 through the refill pipe 250 while the water is supplied to the nozzle water supply pipe 239. That is, the refill water is always supplied to the bowl portion 110 from the time when the water is supplied to the bowl portion 110 until the water injection into the tank 20 is completed. As a result, a desired amount of sealed water WT can be formed reliably after completion of the cleaning.

  The refill pipe 250 is configured to be able to supply water discharged from the water outlet 251 to other than the overflow hole 254. Specifically, the position of the end portion 250a of the refill pipe 250 can be changed so that the water discharged from the water discharge port 251 is supplied into the tank 20. FIG. 7 is a schematic diagram schematically showing how water is discharged from the water outlet 251, and FIG. 7A shows a state when water discharged from the water outlet 251 is supplied to the overflow pipe 253. FIG. 7B shows a state when the tank 2 is supplied. In this embodiment, the rotating shaft 250b provided in the refill piping 250 is rotatably attached to the attachment portion 250c fixed to the throat pipe 320. As shown in these drawings, the end portion 250a of the refill piping 250 is provided. Can be changed around the rotation shaft 250b to change the position of the end 250a, thereby changing the supply destination of water discharged from the water outlet 251. Depending on the type of flush toilet, some refill water needs to be supplied and some need not, but the supply destination of water discharged from the water outlet 251 of the refill pipe 250 can be selected in this way. Therefore, it is not necessary to make it a different structure according to the kind of flush toilet.

  Then, the device for implement | achieving size reduction of the tank 20 is demonstrated. In the flush toilet apparatus FT, as shown in FIG. 4, the throat pipe 320 is arranged so as to be in the lateral direction (left-right direction) in a top view. Thus, the tank is downsized without sacrificing the performance of the jet pump unit 300 by arranging the throat pipe 320 so as to extend in the lateral direction (left-right direction) in a top view. Further, in the flush toilet apparatus FT, the portion of the throat pipe 320 on the suction port 331 side (inclined throat portion 330) is disposed inside the tank 20 in an inclined state in both a top view and a side view. . Specifically, in a side view, the portion is inclined so as to descend toward the suction port 331. Further, in a top view, the portion is inclined with respect to the front-rear direction.

  By arranging the throat pipe 320 in the tank in such a state, a (substantially linear) flow path length necessary to efficiently generate the jet pump action is ensured without increasing the size of the tank 20. doing. Thus, in flush toilet apparatus FT, the tank is miniaturized without sacrificing the performance of jet pump unit 300 by devising the arrangement of throat pipe 320.

  The suction port 331 is disposed at a position that does not overlap with the toilet body 10 in a top view. The nozzle 310 and the bottom wall 221 of the second tank unit 220 exist below the suction port 331, but the toilet body 10 does not exist further below. For this reason, the shape of the lower part of the nozzle in the bottom wall 221 is not restricted for the toilet body 10, and it is possible to obtain an appropriate shape for arranging the nozzle 310. For example, in the present embodiment, a part of the tank 20 is extended downward so that the bottom wall 221 is positioned lower than the upper surface 101 of the toilet body 10. In this way, the nozzle 310 is arranged with a wide space between the suction port 331 and the bottom wall 221 without increasing the upper end position of the tank 20. As a result, the enlargement of the tank 20 is suppressed. In addition, by arranging the lower end (suction port 331) of the inclined throat portion 330 inside the second tank portion 220, the flow path length of the inclined throat portion 330 is ensured. Such a configuration also improves the performance of the jet pump unit 300.

  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.

10: Toilet bowl main body 101: Upper surface 110: Bowl part 120: Rim part 130: Water conduit 131: Inlet 132: First water conduit 133: Outlet 134: Second water conduit 135: Outlet 140: Drain trap pipe 141: Ascending Flow path 142: Down flow path 150: Rear end portion 151: Center portion 20: Tank 201: Upper lid 210: First tank portion 211: Bottom wall 212: Opening 213: Center portion 220: Second tank portion (recessed portion)
221: Bottom wall 231: Water supply pipe 233: Main valve 234: Pilot valve 235: Vacuum breaker 236: Flash lever 237: Operating force transmission mechanism 238: Float 239: Nozzle water supply pipe 240: Partition 241: Opening / closing window 242: Plate member (Water switching valve)
250: Refill piping 250a: End portion 254: Overflow hole 255: Flow path 260: Small tank 270: Corner portion 300: Jet pump unit 310: Nozzle 311: Injection port 320: Throat pipe 330: Inclined throat portion 331: Suction port 340 : Air introduction pipe (Supply flow reduction valve)
348: Air suction water level adjustment mechanism 349: Suction air flow rate adjustment mechanism 351: Vertical throat part 352: Bending throat part 353: Conveyance channel inlet connection part 390: Channel switching mechanism 391: Float 392: Shielding member (channel switching valve)
FT: flush toilet equipment
D: Delta space

Claims (3)

A flush toilet device that discharges filth to a drain pipe with washing 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 in the tank, and 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 inlet of the water conduit is provided at the rear end of the toilet body and the central portion in the lateral direction,
The tank is installed so as to cover the inlet of the water conduit from above, and an opening is formed at the center of the bottom wall of the tank facing the inlet of the water conduit,
The jet pump unit disposed in the tank is
An inverted U-shaped throat pipe having one end penetrating the opening and connected to the inlet of the water conduit via a water conduit inlet connection provided at the one end, and a suction port formed at the other end,
A nozzle that induces a jet pump action by spraying high-speed water from the suction port toward the inside of the throat pipe, and
Inside the tank, a valve unit for supplying and blocking water for inducing a jet pump action to the nozzle is arranged,
Further, the inverted U-shaped throat pipe includes a vertical throat portion extending substantially vertically upward from the conduit inlet connection portion, and an inclined throat that is inclined obliquely downward linearly from the vertical throat portion toward the suction port. And
In the tank, above the inclined throat portion, when viewed in the front-rear direction, the tank becomes wider toward the inner peripheral surface on one side in the lateral direction in the tank and on the upper inner peripheral surface in the tank. When the water level in the tank drops to a predetermined water level in the delta space and on the upper surface of the inclined throat part, air is introduced into the throat pipe to form water in the bowl part. A flush toilet apparatus provided with a supply flow rate reducing valve for reducing the supply flow rate of the toilet.   2. The flush toilet apparatus according to claim 1, wherein the supply water amount reducing valve is fixed to the inclined throat portion so as to be adjustable in height so that the water level for introducing air can be changed.   The flush toilet apparatus according to claim 1, wherein the supply water amount reducing valve is configured to be capable of adjusting an air introduction flow rate.

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