JP2016011502A - Water closet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet device capable of reducing a forward appearance dimension of the 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 FT using the jet pump action by using a jet pump unit 300, is a water closet device in which water passing through a throat pipe 320 increases in a flow rate more than the second rising part 328 side on the first rising part 327 side with respect to a virtual central line CL.

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 before the water in the tank is supplied to the toilet body cannot be discharged, 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. This is a flush toilet device, the size of the flush toilet device can be reduced, and is supplied to the toilet body by suppressing an air reservoir 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 problem, 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, and the washing water As a toilet main body in which a water conduit for guiding the water supplied to the bowl portion is formed, water is stored therein, and 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, A throat pipe having a suction port formed at the 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, The throat pipe is arranged ascending upward from the suction port, a bent portion disposed downstream of the raised portion, and disposed downstream of the bent portion, and downward from the bent portion. And when the throat tube is viewed from a position where it appears to be an inverted U shape, the bent portion is a first curved surface. A second curved surface having a smaller curvature than the curvature of the first curved surface, the wall of the rising portion upstream of the first curved surface being a first rising portion, and the rising of the first curved surface upstream of the second curved surface The wall surface of the section is a second rising portion, and a line connecting the center of the cross section in which the throat pipe and the traveling direction of the water passing through the throat pipe are perpendicular to each other from the suction port to the inlet of the water conduit is a virtual center line When the nozzle is raised The flow rate of water passing through the first rising portion side is greater than that of the second rising portion side than the virtual center line when passing through the opposite end side of the suction port. It is characterized by that.

  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 water decreases, the first rising portion side and the second rising portion are increased by making the first rising portion side more than the flow rate of water passing through the second rising portion side. The amount of water passing through the first curved surface side can be increased compared to the case where the amount of water passing through the side is the same or more on the second ascending portion side. It is possible to suppress air accumulation. It is possible to suppress the water passing through the throat pipe from being subjected to resistance due to the air pool generated inside the throat pipe, and to suppress the instantaneous flow rate of the water supplied to the toilet body from being lowered.

  The nozzle according to a second aspect of the present invention is configured so that the traveling direction of water when sprayed from the nozzle is a traveling direction imaginary line, and the traveling direction is at a position passing through the opposite end side of the suction port of the rising portion. The imaginary line is configured to pass through the first ascending portion side with respect to the imaginary center line.

  The traveling direction imaginary line is first than the imaginary central line of the throat pipe at a position where the traveling direction of water when ejected from the nozzle is a traveling direction imaginary line and passes through the opposite side of the steep throat of the rising portion. By configuring so as to pass through the ascending part side, the flow rate of water passing through the ascending part can be made faster on the first ascending part side than on the second ascending part side. Compared to the case where the flow rate of water passing through the two ascending parts is the same or the speed of the second ascending part is faster, the water passing through the first curved surface side is faster at the first ascending part. The flow rate can be increased. Thereby, the area of the air pool generated on the first curved surface side can be reduced, and the air pool generated inside the throat pipe can be suppressed.

  The nozzle according to a third aspect of the invention is characterized in that the nozzle is ejected from a position different from the virtual center line of the throat pipe.

  By causing the nozzle injection position to be injected from a position different from the virtual center line of the throat pipe, the flow rate of water on the first rising portion side can be made faster than that on the second rising portion side. Therefore, the flow rate of water passing through the first ascending portion side is larger than the case where the flow rate of water passing through the first ascending portion side and the second ascending portion side is the same or the flow velocity of the second ascending portion side is faster. By being able to do, the flow volume of the water which passes the 1st curved surface side can also be increased. Thereby, the area of the air pool generated on the first curved surface side can be reduced, and the air pool generated inside the throat pipe can be suppressed.

  The nozzle according to a fourth aspect of the invention is characterized in that the traveling direction imaginary line from the nozzle is ejected while being inclined with respect to the imaginary center line.

  By making the nozzle traveling direction imaginary line incline with respect to the imaginary center line and inject, the flow rate of water on the first ascending part side can be made faster than that on the second ascending part side. Therefore, the flow rate of water passing through the first ascending portion side is larger than the case where the flow rate of water passing through the first ascending portion side and the second ascending portion side is the same or the flow velocity of the second ascending portion side is faster. By being able to do, the flow volume of the water which passes the 1st curved surface side can also be increased. Thereby, the area of the air pool generated on the first curved surface side can be reduced, and the air pool generated inside the throat pipe can be suppressed.

  The nozzle according to a fifth aspect of the present invention includes an injection port that injects water, and the injection port includes a first injection unit and a second injection unit that has a smaller flow rate than the first injection unit, The first injection unit is disposed so that the water injected from the first injection unit passes through the first rising unit side when passing through the rising unit, and the second injection unit is configured to pass the second injection unit. When the water sprayed from the part passes through the ascending part, the water is arranged so as to pass through the second ascending part side.

  The nozzle includes an injection port, and the injection port includes a first injection unit and a second injection unit that ejects less flow than the first injection unit, and water injected from the first injection unit rises first. By arranging so that the water jetted from the second injection part passes through the second ascending part side, the flow rate of water passing through the ascending part is higher than that of the virtual center line. One rising portion side can be increased more than the second rising portion side. For this reason, the flow rate of water passing through the first curved surface side can be increased compared with the case where the flow rate of water injected from the first injection unit and the second injection unit is injected at the same flow rate. The area of the air pool generated on the curved surface side can be reduced, and the air pool generated inside the throat pipe can be suppressed.

  The first injection part of the sixth invention is configured to be larger than the opening area of the second injection part, and the length of the outer edge constituting the first injection part further constitutes the second injection part It is configured to be longer than the length of the outer edge.

By making the opening area of the first injection unit larger than the opening area of the second injection unit, the flow rate injected from the first injection unit can be made larger than the flow rate injected from the second injection unit. Furthermore, the flow rate that passes through the first ascending portion side is increased so that the length of the outer edge that constitutes the first injection portion is longer than the length of the outer edge that constitutes the second injection portion. Can be more.
More specifically, the water jetted from the jet port advances through the throat pipe while inducing a jet pump action. Therefore, the contact area with the water stored in the tank is increased by increasing the flow rate injected from the first injection unit and increasing the length of the outer edge than the second injection unit. Thus, more water can be drawn into the throat pipe.
Therefore, the flow rate passing through the first ascending portion side can be made larger than that at the second ascending portion side, the area of the air pool generated on the first curved surface side can be reduced, and the air generated inside the throat pipe Accumulation can be suppressed, and a decrease in the instantaneous flow rate of water supplied to the toilet body can be suppressed.

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. 4 is a schematic diagram illustrating a flow of water in which water jetted from a nozzle 310 in the first embodiment passes through the throat pipe 320. FIG. 4 is a schematic diagram illustrating a flow of water in which water jetted from a nozzle 310 in the first embodiment passes through the throat pipe 320. It is a figure showing the structure of the nozzle 310a in 2nd embodiment. It is a schematic diagram showing the flow of the water which the water injected from the nozzle 310a in 2nd embodiment passes the inside of the throat pipe 320a.

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.
The reverse side of the suction port 321 provided in the rising portion 322 is defined as a reverse end 329. When the reverse end 329 is described in more detail, it indicates a position where the rising portion 322 and the bent portion 323 are connected.

  With reference to FIG. 4, the flow of water passing through the inside of the throat pipe 320 will be described. FIG. 4 is a schematic diagram showing the flow of water through which the water jetted from the nozzle 310 passes through the inside of the throat pipe 320.

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 has a first rising portion 327 on the first curved surface 325 side, and a second rising portion 328 on the second curved surface 326 side.

  A line connecting the center of the cross section where the throat pipe 320 and the traveling direction of the water passing through the throat pipe 320 are orthogonal to each other from the suction port 321 to the inlet 131 of the water conduit is defined as a virtual center line CL.

  The nozzle 310 is provided at a lower portion of the suction port 321 and is provided at a position shifted from an extension line extending from the imaginary center line CL of the throat pipe 320 toward the outside of the throat pipe 320.

  By providing the injection position of the nozzle 310 at a position shifted from the extended line extending from the imaginary center line CL of the intake port 321 toward the outside of the throat pipe 320, the flow rate of water on the first ascending portion 327 side is increased to the second ascending portion. It can be faster than the 328 side. Therefore, compared with the case where the flow rate of the water which passes the 1st ascending part 327 side and the 2nd ascending part 328 side is the same, or the flow rate of the 2nd ascending part 328 side is faster, it passes the 1st ascending part 327 side. By increasing the flow rate of water, the flow rate of water passing through the first curved surface 325 side can also be increased. Thereby, the area of the air pool generated on the first curved surface 325 side can be reduced, and the air pool generated inside the throat pipe 320 can be suppressed. A broken line WL shown in FIG. 4 represents the flow of water when passing through the throat pipe 320.

  Further, the traveling direction of water when being ejected from the nozzle 310 as shown in FIG. 5 is defined as a traveling direction virtual line SL, and the traveling direction virtual line SL is higher than the virtual center line CL in the rising portion 322. By inclining the nozzle 310 so as to be on the side, the area of the air pool generated on the first curved surface 325 side can be reduced, and the air pool generated inside the throat pipe can be suppressed. .

Subsequently, a flush toilet apparatus FTa according to a second embodiment of the present invention will be described. The flush toilet apparatus FTa differs from the flush toilet apparatus FT in the nozzle 310a of the jet pump unit 300a, but the other configurations are 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.

  The nozzle 310a will be described with reference to FIG. FIG. 6A is a view of the injection port 311a of the nozzle 310a as viewed from the downstream side. 6b is a cross-sectional view taken along line AA of FIG. 6a.

The nozzle 310 a has an injection port 311 a, and the injection port 311 a includes the first injection unit 312 and the second injection unit 313. The first injection unit 312 is configured to have an opening area larger than that of the second injection unit 313. Further, the length of the first injection portion outer edge 314 constituting the first injection portion 312 is configured to be longer than the length of the second injection portion outer edge 315 constituting the second injection portion 313.
Further, the first injection unit 312 and the second injection unit 313 will be described. The first injection unit 312 is the lower side of the line BB in FIG. 6a and the second injection unit 313 is the upper side of the line BB. .

  Since the opening area of the first injection unit 312 is configured to be larger than that of the second injection unit 313, the flow rate of water injected from the first injection unit 312 is injected from the second injection unit 313. More than the flow rate of water.

  With reference to FIG. 7, the flow of water inside the throat pipe 320a when the nozzle 310a is used will be described.

  As shown in FIG. 7, the nozzle 310a is disposed below the suction port 321a so that the water injected from the first injection unit 312 is on the first rising portion 327a side of the throat pipe 320a and from the second injection unit 313. The nozzle 310a is arranged so that the water to be sprayed is on the second rising pipe 328a side of the throat pipe 320a.

By arranging the nozzle 310a and the throat pipe 320a in this way, the first injection unit 312 is injected from the first injection unit 312 by making the opening area of the first injection unit 312 larger than the opening area of the second injection unit 313. The flow rate can be higher than the flow rate injected from the second injection unit 313. In addition, the first rise by configuring the first injection part outer edge 314 constituting the first injection part 312 to be longer than the second injection part outer edge 315 constituting the second injection part 313. The flow rate passing through the part 327a side can be made larger than that on the second ascending part 328a side.
More specifically, the water jetted from the jet nozzle 311a advances inside the throat pipe 320a while inducing a jet pump action. In view of this, the flow rate of the first injection unit 312 is increased more than that of the second injection unit 313, and the length of the first injection unit outer edge 314 is increased so that the inside of the tank 20a (not shown) is increased. The contact area with the water stored in the tank becomes larger, and more water can be drawn into the throat pipe 320a.
Therefore, the flow rate passing through the first ascending portion 327a side can be larger than that of the second ascending portion 328a side, the area of the air pool generated on the first curved surface 325a side can be reduced, and the inside of the throat pipe 320a Can be suppressed, and a decrease in the instantaneous flow rate of water supplied to the toilet body 10a can be suppressed.

  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, 311a: Injection port 312: First injection unit 313 : Second injection part 314: first injection part outer edge (outer edge)
315: Second injection portion outer edge (outer edge)
320, 320a: Throat tube 321, 321a: suction port 322, 322a: ascending part 323, 323a: bent part 324, 324a: descending part 325, 325a: first curved surface 326, 326a: second curved surface 327, 327a: first Ascending section 328, 328a: Second ascending section 330, 300a: Overflow pipe FT, FTa: Flush toilet device SW: Drain pipe WT: Sealed water CL: Virtual center line SL: Traveling direction imaginary line

Claims (6)

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 the water supplied as the 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;
It is disposed on the downstream side of the bent portion, and has a descending portion extending downward from the bent portion, and is formed so as to have an inverted U shape as a whole,
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,
The wall surface of the rising portion upstream from the first curved surface is a first rising portion, and the wall surface of the rising portion upstream from the second curved surface is a second rising portion,
In the case where the line connecting the throat pipe and the center of the cross section perpendicular to the direction of water passing through the throat pipe from the suction port to the inlet of the water conduit is a virtual center line,
When the nozzle passes through the opposite end side of the suction port of the ascending part, the flow rate of water passing through the first ascending part side is larger than that of the second ascending part side than the virtual center line. A flush toilet apparatus characterized by being configured to be. The nozzle is
In the position where the traveling direction of water when jetted from the nozzle is a traveling direction imaginary line and passes through the opposite end side of the suction port of the rising portion
The flush toilet apparatus according to claim 1, wherein the traveling direction virtual line is configured to pass through the first ascending portion side with respect to the virtual center line.   The flush toilet apparatus according to claim 2, wherein the nozzle is configured to inject an injection position of the nozzle from a position different from the virtual center line of the throat pipe.   The flush toilet apparatus according to claim 2, wherein the nozzle injects the traveling direction imaginary line from the nozzle inclining with respect to the imaginary center line. The nozzle includes an injection port for injecting water,
The injection port includes a first injection unit and a second injection unit having a lower flow rate than the first injection unit,
The first injection unit is arranged so that the water injected from the first injection unit passes through the first rising unit side when passing through the rising unit,
The said 2nd injection part is arrange | positioned so that the water injected from the said 2nd injection part may pass the said 2nd raising part side, when passing the said raising part. Flush toilet equipment. The first injection unit is configured to be larger than the opening area of the second injection unit,
Furthermore, the length of the outer edge which comprises said 1st injection part is comprised so that it may become longer than the length of the outer edge which comprises said 2nd injection part, The flush toilet bowl of Claim 5 characterized by the above-mentioned. apparatus.

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