Water-washing toilet device

Abstract

To provide a flush toilet device that enables a compact layout and improves the pressure loss efficiency of jet water discharge. [Solution] The toilet comprises a flush toilet body having a drain trap pipe, a jet nozzle that discharges flushing water backward into the drain trap pipe, a jet water channel that guides the flushing water to the jet nozzle, a tank that temporarily stores the flushing water, and a pump that pumps up the flushing water stored in the tank via a suction section of the tank. The jet water channel has a downstream water channel leading to the jet nozzle and an upstream water channel connected to the downstream water channel. The downstream water channel is made of ceramic, the suction section and the pump are located on either the left or right side with respect to the drain trap pipe, and the connection between the upstream water channel and the downstream water channel is also located on either the left or right side with respect to the drain trap pipe, the same side as the suction section and the pump.

Description

Technical Field

[0001] The present invention relates to a flushing toilet device, and more particularly to a flushing toilet device of a type that is cleaned by jet spraying.

Background Art

[0002] A flushing toilet device of a type that is cleaned by jet spraying has been widely used conventionally. The jet spray (flushing water) is jetted backward from the jet opening into the inside of the drain trap pipe. The jet spray (flushing water) is guided to the jet opening by a jet water passage.

[0003] Regarding the jet water passage, particularly the downstream water passage of the jet water passage leading to the jet opening, it has been proposed to resinize it (make it resin-made). By resinizing the downstream water passage (for example, by using a resin hose), the advantage of increasing the degree of freedom in the route design of the jet water passage can be obtained.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the downstream water passage is resinized, the risk of dirt adhering to this part increases. From this perspective, it is desirable to make the downstream water passage made of pottery.

[0006] The applicant of the present application has disclosed, in Patent Document 1, a configuration in which while the downstream water passage is made of pottery, the upstream water passage connected thereto is a separate member (for example, a resin member).

[0007] Conventionally, taking advantage of the fact that the upstream water conduit could be arranged in a relatively free layout, the pump located further upstream of the upstream water conduit and the connection between the downstream water conduit and the upstream water conduit were arranged on either side of the drain trap pipeline (the upstream water conduit was arranged so that it crossed the drain trap pipeline in a plan view).

[0008] As a result of diligent research into the arrangement of the upstream water conduit, the inventors have found that by arranging the pump located further upstream of the upstream water conduit and the connection between the downstream water conduit and the upstream water conduit on the same side, either left or right, relative to the drain trap pipeline, an even more compact layout can be achieved, and the pressure loss efficiency of the jet discharge can also be improved.

[0009] This invention was conceived based on the above findings. The object of this invention is to provide a flush toilet device of the type that flushes using a jet stream of water, which can achieve a compact layout and improve the pressure loss efficiency of the jet stream of water. [Means for solving the problem]

[0010] The present invention relates to a flush toilet device comprising: a flush toilet body having a bowl portion and a drain trap pipe extending from the lower part of the bowl portion; a jet outlet for discharging flushing water backward into the drain trap pipe; a jet water channel for guiding flushing water to the jet outlet; a tank for temporarily storing flushing water; and a pump for drawing up the flushing water stored in the tank via a suction section of the tank. The jet water channel comprises a downstream water channel leading to the jet outlet and an upstream water channel connected to the downstream water channel, the downstream water channel being made of ceramic, the suction section and the pump being located on either the left or right side with respect to the drain trap pipe, and the connection between the upstream water channel and the downstream water channel being located on the same left or right side as the suction section and the pump with respect to the drain trap pipe.

[0011] According to the present invention, since the connection between the upstream water conduit and the downstream water conduit is located on the same side as the suction section and the pump with respect to the drain trap pipe, a compact layout can be achieved, and the pressure loss efficiency of the jet discharge can also be improved.

[0012] In the present invention, it is preferable that the suction portion opens in a direction aligned in the front-rear direction, and that the connection portion between the upstream water conduit and the downstream water conduit also extends in the front-rear direction.

[0013] This feature allows for a more compact layout and further improves the pressure loss efficiency of the jet water discharge.

[0014] Furthermore, in the present invention, the suction section is configured such that the connection surface of the tank-side pipeline and the connection surface of the pump-side pipeline are connected, and the connection section between the upstream water conduit and the downstream water conduit is configured such that the connection surface of the upstream water conduit and the connection surface of the downstream water conduit are connected, and it is preferable that the connection surface of the tank-side pipeline, the connection surface of the pump-side pipeline, the connection surface of the upstream water conduit, and the connection surface of the downstream water conduit are aligned so as to be parallel to each other.

[0015] These features allow for an even more compact layout and further improve the pressure loss efficiency of the jet water discharge.

[0016] Furthermore, in the present invention, it is preferable that the direction of flow of the cleaning water when passing through the suction section is in the front-to-back direction, and that the direction of flow of the cleaning water when passing through the connection section between the upstream water channel and the downstream water channel is also in the front-to-back direction.

[0017] These features allow for an even more compact layout and further improve the pressure loss efficiency of the jet water discharge.

[0018] In the present invention, it is preferable that the connection portion between the upstream water conduit and the downstream water conduit is located below the bowl portion, and the sucking-up portion is also located below the bowl portion.

[0019] Such a feature can also achieve a more compact layout.

[0020] In the present invention, it is preferable that all of the water conduits from the sucking-up portion to the connection portion between the upstream water conduit and the downstream water conduit are arranged on the same left or right side as the sucking-up portion and the pump with respect to the drain trap pipe.

[0021] Such a feature can also achieve a more compact layout and further improve the pressure loss efficiency of zero discharge.

[0022] In the present invention, it is preferable that all of the water conduits from the sucking-up portion to the connection portion between the upstream water conduit and the downstream water conduit are arranged so as not to overlap the drain trap pipe in plan view.

[0023] Such a feature can also achieve a more compact layout and further improve the pressure loss efficiency of zero discharge.

[0024] In the present invention, it is preferable that all of the water conduits from the sucking-up portion to the connection portion between the upstream water conduit and the downstream water conduit are located below the rim portion.

[0025] Such a feature can also achieve a more compact layout and further improve the pressure loss efficiency of zero discharge.

[0026] In addition, the following related inventions can also be extracted. That is, the present invention is a flushing toilet device, comprising a flushing toilet main body having a bowl portion and a drainage trap pipe extending from the lower part of the bowl portion, a jet opening for discharging washing water backward into the drainage trap pipe, a jet water conduit for guiding the washing water to the jet opening, a tank for temporarily storing the washing water, and a pump for pumping up the washing water stored in the tank through the suction portion of the tank. The jet water conduit has a downstream water conduit leading to the jet opening and an upstream water conduit connected to the downstream water conduit. The downstream water conduit is made of pottery. The suction portion opens in a direction aligned in the front-rear direction. The connection portion between the upstream water conduit and the downstream water conduit also extends in the front-rear direction. The flushing toilet device is characterized in that the downstream water conduit is made of pottery, the suction portion opens in a direction aligned in the front-rear direction, and the connection portion between the upstream water conduit and the downstream water conduit also extends in the front-rear direction.

[0027] Furthermore, the following related inventions can also be extracted. That is, the present invention is a flushing toilet device, comprising a flushing toilet main body having a bowl portion and a drainage trap pipe extending from the lower part of the bowl portion, a jet opening for discharging washing water backward into the drainage trap pipe, a jet water conduit for guiding the washing water to the jet opening, a tank for temporarily storing the washing water, and a pump for pumping up the washing water stored in the tank through the suction portion of the tank. The jet water conduit has a downstream water conduit leading to the jet opening and an upstream water conduit connected to the downstream water conduit. The downstream water conduit is made of pottery. The suction portion is formed by connecting the connection surface of the tank-side pipe and the connection surface of the pump-side pipe. The connection portion between the upstream water conduit and the downstream water conduit is formed by connecting the connection surface of the upstream water conduit and the connection surface of the downstream water conduit. The connection surface of the tank-side pipe, the connection surface of the pump-side pipe, the connection surface of the upstream water conduit, and the connection surface of the downstream water conduit are aligned so as to be parallel to each other. The flushing toilet device is characterized in that the downstream water conduit is made of pottery, the suction portion is formed by connecting the connection surface of the tank-side pipe and the connection surface of the pump-side pipe, the connection portion between the upstream water conduit and the downstream water conduit is formed by connecting the connection surface of the upstream water conduit and the connection surface of the downstream water conduit, and the connection surface of the tank-side pipe, the connection surface of the pump-side pipe, the connection surface of the upstream water conduit, and the connection surface of the downstream water conduit are aligned so as to be parallel to each other.

Effects of the Invention

[0028] [[ID=[] According to the present invention, since the connection between the upstream water conduit and the downstream water conduit is located on the same side as the suction section and the pump with respect to the drain trap pipe, a compact layout can be achieved, and the pressure loss efficiency of the jet discharge can also be improved. [Brief explanation of the drawing]

[0029] [Figure 1] This is a perspective view showing a flush toilet according to one embodiment of the present invention. [Figure 2] This is a plan view of the flush toilet in this embodiment with the sanitary cleaning device removed. [Figure 3] This is a schematic cross-sectional view along line III-III in Figure 2. [Figure 4A] This is a perspective view of the functional device of the flush toilet of this embodiment, seen from the upper left at an angle. [Figure 4B] This is a perspective view of the functional device of the flush toilet of this embodiment, seen from the upper right at an angle. [Figure 5] This diagram shows the water supply channel through which the flushing water of the toilet in this embodiment flows. [Figure 6] This is a schematic cross-sectional view of the flush toilet of this embodiment along a vertical plane extending in the front-to-back direction through the pump device. [Figure 7] This is a schematic perspective view of the upstream Z-type water conduit and the Z-type water conduit connecting pipe. [Figure 8] This is a schematic front view of the upstream Z-type water conduit and the Z-type water conduit connecting pipe. [Figure 9] This is a schematic diagram showing the flow of cleaning water through the upstream Z-type water conduit and the Z-type water conduit connecting pipe, indicated by arrows. [Figure 10] This is a schematic cross-sectional view of the vicinity of the Z-type water conduit connecting pipe. [Modes for carrying out the invention]

[0030] In this specification, from the perspective of a user standing facing the front of a flush toilet, the near side is referred to as "front," the far side as "back," the left side as "left," and the right side as "right" (from the perspective of a user seated on the flush toilet, left and right will be reversed).

[0031] (Overall structure) Figure 1 is a perspective view showing a flush toilet 1 (flush toilet device) according to one embodiment of the present invention, Figure 2 is a plan view of the flush toilet 1 of this embodiment with the sanitary cleaning device removed, and Figure 3 is a schematic cross-sectional view along line III-III in Figure 2.

[0032] As shown in Figure 1, the flush toilet 1 of this embodiment is a wall-mounted flush toilet whose rear surface is fixed to a wall surface W. The flush toilet 1 comprises a ceramic toilet bowl body 2 (flush toilet bowl body), a tank device 4 for storing flushing water supplied to the toilet bowl body 2, and a sanitary cleaning device 6 placed on the upper surface of the toilet bowl body 2.

[0033] A shut-off valve 8 is provided on the wall W for supplying or stopping the flow of flushing water from a water source (not shown), such as a water supply pipe, to the flush toilet 1. The shut-off valve 8 is connected to the flush toilet 1 via a water supply pipe 10.

[0034] In Figure 2, the rim outlet 22, rim water channel 24, upstream Z-channel water pipe 60 (upstream Z-channel water channel), downstream Z-channel water channel 28, and Z-channel water channel connecting pipe 100 (connection section) are each indicated by dashed lines.

[0035] As shown in Figures 2 and 3, the toilet bowl body 2 has a bowl portion 12 for receiving waste, a drain trap pipe 14 connected below the bowl portion 12 for discharging waste, and a skirt portion 16 that surrounds the bowl portion 12 and the drain trap pipe 14 from the outside. A space S is formed between the bowl portion 12 and the drain trap pipe 14 and the skirt portion 16.

[0036] The bowl portion 12 has a bowl-shaped waste receiving surface 18 and a rim portion 20 formed along the upper edge of the bowl portion 12. Water is formed inside the bowl portion 12 (a water surface WS is formed).

[0037] The rim portion 20 has a rim outlet 22 for discharging cleaning water towards the rear, and a rim water channel 24 for guiding the cleaning water to the rim outlet 22. The rim outlet 22 is located near the center in the front-to-back direction on the right side of the bowl portion 12. The cleaning water discharged from the rim outlet 22 flows down the waste receiving surface 18 while swirling along the inner circumferential surface of the rim portion 20, cleaning the bowl portion 12.

[0038] Below the bowl section 12, a jet opening 26 is formed to discharge cleaning water toward the inlet 14a of the drain trap pipe 14. The jet opening 26 is positioned opposite the inlet 14a of the drain trap pipe 14, so that the cleaning water discharged from the jet opening 26 flows into the drain trap pipe 14 and activates the siphon effect.

[0039] Washing water is supplied to the jet outlet 26 via the upstream jet water conduit 60, the jet water conduit connecting pipe 100, and the downstream jet water conduit 28.

[0040] The drain trap pipe 14 has an inlet 14a connected to the bottom of the bowl section 12, an upward pipe 14b extending upward from the inlet 14a, a top 14c located at the highest point of the upward pipe 14b that defines the water level WS, and a rear pipe 14d extending almost horizontally backward from the top 14c. The rear pipe 14d of the drain trap pipe 14 is connected to a drain pipe (not shown) inside the wall W via a drain socket 30.

[0041] The sanitary washing device 6 comprises a main body (not shown), a washing nozzle (not shown) that is movable back and forth from the main body, a toilet seat (not shown) that is rotatably attached to the main body, and a toilet seat cover that is rotatably attached to the main body so as to cover the toilet seat. The water supply pipe 10 connected to the shut-off valve 8 is connected to the main body of the sanitary washing device 6 and supplies washing water to be sprayed from the washing nozzle.

[0042] Within the space S, the tank device 4 is housed in the portion surrounded by the skirt portion 16 below the bowl portion 12. Within the space S, in the portion rear of the bowl portion 12, a functional device for supplying flushing water stored in the tank device 4 to the toilet bowl body 2 is housed. This functional device may include, for example, a water supply valve device 32, a pump device 34, a switching valve device 36, and a control device 38. Furthermore, a base plate 40 is provided in the bottom opening 2a surrounded by the skirt portion 16 of the toilet bowl body 2. The aforementioned functional device is supported by this base plate 40.

[0043] Next, with reference to Figures 4A and 4B, the tank device 4, functional device, and base plate 40 housed in the space S within the toilet bowl body 2 will be described.

[0044] Figure 4A is a perspective view of the functional device of the flush toilet 1 of this embodiment, viewed from the upper left, and Figure 4B is a perspective view of the functional device of the flush toilet 1 of this embodiment, viewed from the upper right, at an angle. In Figure 4A, the direction in which the flushing water flows is indicated by an arrow.

[0045] The tank device 4 includes a water storage tank 42 (tank) for storing flushing water supplied to the toilet bowl body 2, a tank water supply unit 46 for allowing flushing water from the tank water supply pipe 44 to flow into the water storage tank 42, a float switch 48 for detecting the water level of flushing water stored in the water storage tank 42, and a fixing member 50 for fixing the tank device 4 to the bottom surface of the toilet bowl body 2.

[0046] The water storage tank 42 is formed in an L-shape in plan view, extending forward to the right of the drain trap pipe 14, then bending and extending to the left. The water storage tank 42 is a resin tank that stores cleaning water used for rim discharge and jet discharge, and is capable of storing a predetermined amount of cleaning water.

[0047] The tank water supply unit 46 is located on top of the water storage tank 42. The upstream side of the tank water supply unit 46 is connected to the tank water supply pipe 44, and the downstream side of the tank water supply unit 46 is connected to the water storage tank 42. The tank water supply unit 46 has a flow path formed inside to guide the cleaning water from the tank water supply pipe 44 towards the water storage tank 42.

[0048] The float switch 48 is designed to turn off when the water level in the water storage tank 42 falls below the shut-off level (full water level). Conversely, the float switch 48 turns on when the water level in the water storage tank 42 rises to the shut-off level, thereby closing the water supply valve device 32.

[0049] The water storage tank 42 is equipped with an overflow unit 62 for draining cleaning water outside the tank in the event that, for example, the float switch 48 malfunctions and the tank continues to supply water. The overflow unit 62 is connected to a drain socket 30, so that cleaning water overflowing from the water storage tank 42 is discharged into the drain socket 30 via the overflow unit 62.

[0050] The water supply valve device 32 includes a constant flow valve (not shown) for maintaining a constant flow rate of cleaning water, an on-off valve (not shown) located downstream of the constant flow valve for switching between supplying and shutting off cleaning water, and a solenoid valve (not shown) for driving the on-off valve. The upstream side of the water supply valve device 32 is connected to a water source (not shown) via a stopcock 8 and a water supply pipe 10, while the downstream side of the water supply valve device 32 is connected to the sanitary cleaning device 6 via a water supply pipe 52 for the sanitary cleaning device, and also to the tank device 4 via a water supply pipe 44 for the tank. When the solenoid valve opens electromagnetically, the on-off valve opens, and cleaning water from the water source is supplied to the tank device 4 via the water supply pipe 44 for the tank.

[0051] The pump device 34 is a pressurized pump that draws in the flushing water stored in the tank device 4 and pumps it under pressure to the toilet bowl body 2. The upstream side of the pump device 34 is connected to the tank device 4 via the upstream connecting pipe 54, and the downstream side of the pump device 34 is connected to the switching valve device 36 via the downstream connecting pipe 56. When the pump device 34 is operated, the flushing water stored in the tank device 4 is pumped under pressure and discharged from the rim outlet 22 and jet outlet 26, thereby flushing the toilet bowl.

[0052] The switching valve device 36 has a switching valve body (not shown) and switches the water supply channels that supply cleaning water supplied from the pump device 34 to the rim discharge port 22 and the jet port 26, respectively. The upstream side of the switching valve device 36 is connected to the pump device 34 via a downstream connecting pipe 56. The downstream side of the switching valve device 36 is connected to the rim discharge port 22 via a rim water supply pipe 58 and a rim water conduit 24, and is also connected to the jet port 26 via an upstream jet water conduit 60, a jet water conduit connecting pipe 100, and a downstream jet water conduit 28. When the switching valve body is closed, cleaning water from the pump device 34 is supplied to the rim discharge port 22, and when the switching valve body is open, cleaning water from the pump device 34 is supplied to both the rim discharge port 22 and the jet port 26.

[0053] The control device 38 is electrically connected to a remote control (not shown), a tank device 4 (particularly a float switch 48), a sanitary cleaning device 6, a water supply valve device 32, and a pump device 34, and is capable of sending and receiving various signals. When the control device 38 receives a cleaning start signal for a large or small cleaning from the remote control, it drives or stops the pump device 34 based on a pre-stored cleaning sequence.

[0054] Specifically, when the user operates the remote control, the control device 38 drives the pump device 34 to discharge the flushing water stored in the tank device 4 from the rim outlet 22 and the jet outlet 26. In addition, after flushing the toilet, the control device 38 opens the water supply valve device 32 to supply water to the tank, and closes the water supply valve device 32 when the float switch 48 detects that the tank is full.

[0055] The pipes connected to each element of the aforementioned functional device (water supply pipe 10, water supply pipe 44 for the tank, water supply pipe 52 for the sanitary washing device, upstream connecting pipe 54, downstream connecting pipe 56, water supply pipe 58 for the rim, and upstream jet water conduit pipe 60) are flexible and can absorb manufacturing errors in the ceramic toilet bowl body 2. On the other hand, the downstream jet water conduit 28 is formed as part of the ceramic toilet bowl body 2.

[0056] Next, Figure 5 is a diagram showing the water supply channel through which the flushing water of the toilet bowl 1 of this embodiment flows.

[0057] As shown in Figure 5, the water supply channel for the flush toilet 1 consists of a stopcock 8, a water supply valve device 32, a tank device 4, a pump device 34, and a switching valve device 36, arranged from the upstream side.

[0058] First, cleaning water is supplied from the water source to the water supply valve device 32 via the stopcock 8 and the water supply pipe 10. The cleaning water supplied to the water supply valve device 32 is then supplied to the sanitary cleaning device 6 via the water supply pipe 52 for the sanitary cleaning device, and also to the tank device 4 via the water supply pipe 44 for the tank.

[0059] The cleaning water supplied to and stored in the tank device 4 is drawn up by the pump device 34 through the upstream connecting pipe 54 and the suction port 34a of the pump device water conduit 34p. The cleaning water thus drawn up is supplied to the switching valve device 36 via the downstream connecting pipe 56.

[0060] The cleaning water supplied to the switching valve device 36 is discharged from the rim outlet 22 via the rim water supply pipe 58 and the rim water conduit 24, and is also discharged as a jet from the jet outlet 26 via the upstream jet water conduit 60, the jet water conduit connecting pipe 100, and the downstream jet water conduit 28.

[0061] The cleaning water that overflows from the tank device 4 is discharged to the drain socket 30 via the overflow unit 62.

[0062] Next, Figure 6 is a cross-sectional view of the flush toilet 1 of this embodiment along a vertical plane extending in the front-rear direction through the pump device 34 and the upstream connecting pipe 54.

[0063] As can be seen from Figures 2, 4A, 4B, and 6, the upstream connecting pipe 54, the pump device 34, the upstream water supply pipe 56, the switching valve device 36, the upstream Z-type water conduit 60, and the Z-type water conduit connecting pipe 100 are all positioned to the left of the drain trap pipeline 14. The upstream portion of the downstream Z-type water conduit 28, which is connected to the upstream Z-type water conduit 60 by the Z-type water conduit connecting pipe 100, is also positioned to the left of the drain trap pipeline 14.

[0064] To more clearly show the relative positional relationship of these elemental components, a schematic perspective view of these elemental components is shown in Figure 7, a schematic front view of these elemental components is shown in Figure 8, and the flow of cleaning water passing through these elemental components is indicated by arrows in Figure 9. Figure 10 is an enlarged cross-sectional view of the vicinity of the Z-channel connecting pipe 100.

[0065] Returning to Figures 4A, 4B, and 6, in the area A to the left of the drain trap pipeline 14 (the area not occupied by the L-shaped water storage tank 42), the functional devices—the pump device 34, the switching valve device 36, and the control device 38—are arranged. The pump device 34, the control device 38, and the switching valve device 36 are arranged in this order so as to be in approximately a single line vertically.

[0066] Furthermore, in area A, there is an upstream connecting pipe 54 connecting the tank device 4 and the pump device 34, a downstream connecting pipe 56 connecting the pump device 34 and the switching valve device 36, and an upstream jet water conduit 60 (upstream jet water conduit).

[0067] The pump device 34 is positioned so as to face the rear wall 72b of the left side region 72 of the water storage tank 42 in the front-rear direction. The pump device 34 is also positioned so as to be at approximately the same height as the upper wall 72a of the left side region 72.

[0068] The outflow pipeline 72c, which extends rearward from the left-side area 72 of the water storage tank 42, is a pipeline that draws up cleaning water from the water storage tank 42 through the suction port 72e, and its outlet 72d is connected via the upstream connecting pipe 54 to the suction port 34a of the pump device water conduit 34p of the pump device 34.

[0069] The control device 38 is fixed to the upper surface of the pump device 34, and the switching valve device 36 is fixed to the upper surface of the control device 38. The downstream connecting pipe 56 that connects the pump device 34 and the switching valve device 36 is located near the control device 38 and is arranged in parallel with the control device 38.

[0070] The pump device 34, the control device 38, and the switching valve device 36 are arranged such that, in a plan view, at least a portion of each overlaps the others. The switching valve device 36 is located inside the outer periphery of the pump device 34 and the outer periphery of the control device 38 in a plan view. The downstream connecting pipe 56 is located inside the outer periphery of the pump device 34 in a plan view.

[0071] (Characteristic structure (1)) In the flush toilet 1 of this embodiment, as shown in particular in Figures 6 and 10, the jet water channel connecting pipe 100 (the connection between the upstream jet water channel 60 and the downstream jet water channel 28) is located behind the jet opening 26 and below the water level WS.

[0072] Furthermore, in the flush toilet 1 of this embodiment, as shown in particular in Figures 6 and 10, the jet water conduit connecting pipe 100 is located below the bowl portion 12 (in a plan view, it is located inside the outer rim of the bowl portion 12).

[0073] Furthermore, in the flush toilet 1 of this embodiment, as shown in particular in Figures 2, 6 and 10, the jet water conduit connecting pipe 100 is located above the jet opening 26 (the lower end of the opening).

[0074] Furthermore, in the flush toilet 1 of this embodiment, as shown particularly in Figures 6 and 10, the jet water conduit connecting pipe 100 is watertightly attached to the rear end face 104 of the ceramic portion that demarcates the downstream jet water conduit 28 via an annular sealing member 103 using double mounting sleeves 101 and 102.

[0075] Furthermore, in the flush toilet 1 of this embodiment, the upstream jet water conduit 60 is made of a flexible resin hose.

[0076] In the flush toilet 1 of this embodiment, as described above, the upstream connecting pipe 54, pump device 34, upstream water supply pipe 56, switching valve device 36, upstream jet water conduit pipe 60, and jet water conduit connecting pipe 100 are arranged to the left of the drain trap pipe 14.

[0077] Furthermore, in the flush toilet 1 of this embodiment, as shown in particular in Figures 2, 7, and 8, the jet opening 26 opens towards the rear in a direction aligned in the front-to-back direction, and the jet water channel connecting pipe 100 also extends in a direction aligned in the front-to-back direction.

[0078] (Characteristic structure (2)) In the flush toilet 1 of this embodiment, the pump device 34 is configured to draw up flushing water from the left side region 72 of the water storage tank 42 via the suction port 72e of the outflow pipe 72c (suction section), the said outflow pipe 72c, the upstream connecting pipe 54, and the suction port 34a of the pump device water conduit 34p.

[0079] Furthermore, the outflow pipe 72c (including the suction port 72e) is positioned to the left of the drain trap pipe 14, similar to the upstream connecting pipe 54 and the pump device 34.

[0080] Furthermore, in the flush toilet 1 of this embodiment, the outflow pipe 72c (including the suction port 72e) opens in a direction aligned in the front-to-back direction, and the jet water conduit connecting pipe 100 also extends in a direction aligned in the front-to-back direction.

[0081] Therefore, in the flush toilet 1 of this embodiment, as shown in Figure 9 in particular, the direction of flow of flushing water when passing through the outflow pipe 72c is in the front-to-back direction, and the direction of flow of flushing water when passing through the jet water conduit connecting pipe 100 is also in the front-to-back direction.

[0082] Furthermore, in the flush toilet 1 of this embodiment, as shown in Figure 6 in particular, the outflow pipe 72c is also located below the bowl portion 12 (in a plan view, it is located inside the outer rim of the bowl portion 12).

[0083] Furthermore, in the flush toilet 1 of this embodiment, as shown in particular in Figures 6 and 9, all of the water conduits from the outflow pipe 72c to the jet water conduit connecting pipe 100 are located to the left of the drain trap pipe 14, on the same side as the outflow pipe 72c and the pump device 34, and are arranged so as not to overlap with the drain trap pipe 14 in a plan view, and are located below the rim portion 20.

[0084] (Effects of the characteristic configuration (1)) As described above, with the flush toilet 1 of this embodiment, a compact layout can be achieved because the jet water conduit connecting pipe 100 is located below the water level WS.

[0085] Conventionally, there was a practice of positioning the Z-channel connecting pipe 100 (connection part) between the ceramic downstream Z-channel 28 and the resin upstream Z-channel 60 (upstream Z-channel) above the water level WS. However, the flush toilet 1 of this embodiment eliminates this practice by ensuring watertightness around the Z-channel connecting pipe 100 using an annular sealing member 103 or the like.

[0086] Furthermore, according to the flush toilet 1 of this embodiment, a compact layout can be achieved because the jet water conduit connecting pipe 100 is located below the bowl portion 12 (it is arranged by efficiently utilizing the area below the bowl portion 12).

[0087] If the connection between the upstream and downstream water channels is permitted to be located below the reservoir level and below the bowl section, an even more compact layout can be achieved. (However, a compact layout can also be achieved if part or all of the connection between the upstream and downstream water channels is located below the rim section instead of below the bowl section.)

[0088] Furthermore, according to the flush toilet 1 of this embodiment, the watertight seal between the jet water conduit connecting pipe 100 (or mounting sleeves 101, 102) and the rear end face 104 of the ceramic portion that separates the downstream jet water conduit 28 is ensured by the annular sealing member 103. This reliably prevents leakage of flushing water (or wastewater in the event of backflow) around the jet water conduit connecting pipe 100.

[0089] Furthermore, in the flush toilet 1 of this embodiment, since the upstream jet water conduit 60 is made of a flexible resin hose, the design flexibility of the upstream jet water conduit 60 is increased.

[0090] Furthermore, in the flush toilet 1 of this embodiment, since the jet water conduit connecting pipe 100 is located above the jet opening 26 (the lower end of the opening), there is no path for the flushing water to rise, resulting in good pressure loss efficiency.

[0091] Furthermore, in the flush toilet 1 of this embodiment, the upstream connecting pipe 54, pump device 34, upstream water supply pipe 56, switching valve device 36, upstream jet water conduit pipe 60, and jet water conduit connecting pipe 100 are located to the left of the drain trap pipe 14, thus enabling a more compact layout and improving pressure loss efficiency.

[0092] Furthermore, according to the flush toilet 1 of this embodiment, the jet opening 26 is aligned in the front-to-back direction and opens towards the rear, and the jet water conduit connecting pipe 100 also extends in the front-to-back direction, thus enabling an even more compact layout and improving pressure loss efficiency.

[0093] (Effects of the characteristic configuration (2)) Furthermore, according to the flush toilet 1 of this embodiment as described above, the outflow pipe 72c (including the suction port 72e) is also positioned to the left of the drain trap pipe 14, similar to the upstream connecting pipe 54 and the pump device 34. As a result, the outflow pipe 72c, the pump device 34, and the jet water conduit connecting pipe 100 are all positioned to the left (same side) of the drain trap pipe 14, enabling a compact layout and improving the pressure loss efficiency of the jet water discharge.

[0094] Furthermore, according to the flush toilet 1 of this embodiment, the outflow pipe 72c opens in a direction aligned in the front-to-back direction, and the jet water conduit connecting pipe 100 also extends in a direction aligned in the front-to-back direction, thus enabling an even more compact layout and further improving the pressure loss efficiency of the jet water discharge.

[0095] Furthermore, in this embodiment, as shown in Figure 9 in particular, the flush toilet 1 has a forward-backward flow direction for the flushing water as it passes through the outflow pipe 72c, and the flushing water as it passes through the jet water conduit connecting pipe 100 also has a forward-backward flow direction. This feature allows for an even more compact layout and can be evaluated as further improving the pressure loss efficiency of the jet water discharge.

[0096] Furthermore, in this embodiment, as shown in Figure 6 in particular, the outflow pipe 72c of the flush toilet 1 is also located below the bowl portion 12 (in a plan view, it is located inside the outer rim of the bowl portion 12). This feature can be evaluated as enabling an even more compact layout.

[0097] Furthermore, in the flush toilet 1 of this embodiment, as shown in particular in Figures 6 and 9, all of the water conduits from the outflow pipe 72c to the jet water conduit connecting pipe 100 are located to the left of the drain trap pipe 14, on the same side as the outflow pipe 72c and the pump device 34, and are positioned so as not to overlap with the drain trap pipe 14 in a plan view, and are located below the rim portion 20. It can be said that each of these features, and / or a combination thereof, enables an even more compact layout and further improves the pressure loss efficiency of the jet water discharge.

[0098] (Variation 1) In the above-described embodiment, the outflow pipeline 72c (suction section) penetrates the rear wall 72b of the left-side region 72 of the water storage tank 42, and the Z-channel connecting pipe 100 (connection section between the upstream Z-channel 60 and the downstream Z-channel 28) penetrates the rear wall of the ceramic section that demarcates the downstream Z-channel 28. However, the present invention is not limited to these connection types.

[0099] For example, the suction section that draws up the cleaning water from the water storage tank 42 may be of a type in which the connection surface of the tank-side pipeline and the connection surface of the pump-side pipeline are connected. Similarly, the connection section between the upstream jet conduit and the downstream jet conduit may also be of a type in which the connection surface of the upstream jet conduit and the connection surface of the downstream conduit are connected.

[0100] When these types are adopted, it is preferable that the respective connection surfaces, namely the connection surface of the tank-side pipeline, the connection surface of the pump-side pipeline, the connection surface of the upstream water conduit, and the connection surface of the downstream water conduit, are aligned parallel to each other. This allows for a more compact layout.

[0101] (Modification 2) In the previously described embodiment and modification 1, the flush toilet 1 was wall-mounted. A flush toilet (flushing toilet device) having the features of the previously described embodiment and modification 1 can effectively utilize the advantage of "realizing a compact layout" when it is wall-mounted.

[0102] However, at least at the time of filing this application, the flush toilet device of the present invention is not limited to a wall-mounted type, but may also be a floor-standing type. Even if it is a floor-standing type, the same effects and advantages as described above can be obtained.

[0103] Furthermore, the present invention includes the following features (inventions). [Feature 1] A flush toilet device, A flush toilet body having a bowl section and a drain trap pipe extending from the lower part of the bowl section, A jet outlet for discharging cleaning water backward into the drain trap pipe, A jet water channel that guides cleaning water to the jet opening, A tank for temporarily storing the cleaning water, A pump that draws up the cleaning water stored in the tank via the suction section of the tank, Equipped with, The aforementioned Z-type water conduit has a downstream water conduit leading to the Z-type outlet, and an upstream water conduit connected to the downstream water conduit. The aforementioned downstream water channel is made of ceramic, The suction unit and the pump are located on either the left or right side with respect to the drain trap pipeline. The connection between the upstream water channel and the downstream water channel is also located on either the left or right side of the drain trap pipeline, the same side as the suction section and the pump. A flush toilet device characterized by the following features. [Feature 2] The aforementioned suction section has openings aligned in the front-to-back direction, The connection between the upstream water channel and the downstream water channel also extends in the front-to-back direction. A flush toilet device as described in Feature 1, characterized by the features described above. [Feature 3] The suction section is configured such that the connection surface of the tank-side pipeline and the connection surface of the pump-side pipeline are connected. The connection between the upstream water channel and the downstream water channel is configured such that the connection surface of the upstream water channel and the connection surface of the downstream water channel are connected. The connecting surfaces of the tank-side pipeline, the pump-side pipeline, the upstream water conduit, and the downstream water conduit are aligned so as to be parallel to each other. A flush toilet device according to feature 1 or 2. [Feature 4] The direction of flow of the cleaning water as it passes through the suction section is in the front-to-back direction. The direction of flow of the washing water as it passes through the connection between the upstream and downstream water channels is also the forward and backward direction. A flush toilet device according to any one of the features 1 to 3. [Feature 5] The connection between the upstream water channel and the downstream water channel is located below the bowl section. The suction portion is also located below the bowl portion. A flush toilet device according to any one of features 1 to 4. [Feature 6] All of the water conduits from the suction section to the connection between the upstream water conduit and the downstream water conduit are located on either the left or right side of the drain trap pipeline, the same side as the suction section and the pump. A flush toilet device according to any one of features 1 to 5. [Feature 7] All of the water channels from the suction section to the connection between the upstream water channel and the downstream water channel are arranged so that they do not overlap with the drain trap pipe in a plan view. A flush toilet device according to any one of features 1 to 6. [Feature 8] The entire water conduit from the suction section to the connection section between the upstream water conduit and the downstream water conduit is located below the rim section. A flush toilet device according to any one of features 1 to 7. [Feature A1] A flush toilet device, A flush toilet body having a bowl section and a drain trap pipe extending from the lower part of the bowl section, A jet outlet for discharging cleaning water backward into the drain trap pipe, A jet water channel that guides cleaning water to the jet opening, A tank for temporarily storing the cleaning water, A pump that draws up the cleaning water stored in the tank via the suction section of the tank, Equipped with, The aforementioned Z-type water conduit has a downstream water conduit leading to the Z-type outlet, and an upstream water conduit connected to the downstream water conduit. The aforementioned downstream water channel is made of ceramic, The aforementioned suction section has openings aligned in the front-to-back direction, The connection between the upstream water channel and the downstream water channel also extends in the front-to-back direction. A flush toilet device characterized by the following features. [Feature A2] A flush toilet device, A flush toilet body having a bowl section and a drain trap pipe extending from the lower part of the bowl section, A jet outlet for discharging cleaning water backward into the drain trap pipe, A jet water channel that guides cleaning water to the jet opening, A tank for temporarily storing the cleaning water, A pump that draws up the cleaning water stored in the tank via the suction section of the tank, Equipped with, The aforementioned Z-type water conduit has a downstream water conduit leading to the Z-type outlet, and an upstream water conduit connected to the downstream water conduit. The aforementioned downstream water channel is made of ceramic, The suction section is configured such that the connection surface of the tank-side pipeline and the connection surface of the pump-side pipeline are connected. The connection between the upstream water channel and the downstream water channel is configured such that the connection surface of the upstream water channel and the connection surface of the downstream water channel are connected. The connecting surfaces of the tank-side pipeline, the pump-side pipeline, the upstream water conduit, and the downstream water conduit are aligned so as to be parallel to each other. A flush toilet device characterized by the following features. [Explanation of symbols]

[0104] 1 Flush toilet (flush toilet device) 2. Toilet bowl (flush toilet bowl) 2a Bottom opening 4 Tank equipment 6. Sanitary cleaning equipment 8. Shut-off valve 10 Water supply pipe 12 Bowl section 14 Drain trap pipe 14a Entrance 14b Ascent conduit 14c top 14d Rear conduit 16 Skirt section 18 Waste receiving surface 20 Rim section 22 Rim spout 24 Rim water conduit 26 Z-mouth 28 Downstream Z-type water conduit 30 Drain sockets 32 Water supply valve device 34 Pumping equipment 34a Inlet 34p Pumping System Water Conduit 36. Switching valve device 38 Control device 40 base plate 42 Water storage tanks 44 Water supply pipe for tank 46 Tank water supply unit 48 Float switch 50 Fixing member 52 Water supply pipe for sanitary cleaning equipment 54 Upstream connecting pipe 56 Downstream water supply pipe 58 Rim water supply pipe 60 Upstream Z-type water conduit (upstream Z-type water channel) 62 Overflow Unit 72 Left area 72a Top wall 72b Rear wall 72c Outflow pipe 72d exit 72e Suction port 100 Z-type water conduit connecting pipe 101 Mounting sleeve (outside) 102 Mounting sleeve (inside) 103 Annular sealing member 104 Rear end face Area A S space W Wall WS Reservoir surface

Claims

1. A flush toilet device, A flush toilet body having a bowl section and a drain trap pipe extending from the lower part of the bowl section, A jet outlet for discharging cleaning water backward into the drain trap pipe, A jet water channel that guides cleaning water to the jet opening, A tank for temporarily storing the cleaning water, A pump that draws up the cleaning water stored in the tank via the suction section of the tank, Equipped with, The aforementioned Z-type water conduit has a downstream water conduit leading to the Z-type outlet, and an upstream water conduit connected to the downstream water conduit. The aforementioned downstream water channel is made of ceramic, The suction unit and the pump are located on either the left or right side with respect to the drain trap pipeline. The connection between the upstream water channel and the downstream water channel is also located on either the left or right side of the drain trap pipeline, the same side as the suction section and the pump. A flush toilet device characterized by the following features.

2. The aforementioned suction section has openings aligned in the front-to-back direction, The connection between the upstream water channel and the downstream water channel also extends in the front-to-back direction. The flush toilet device according to feature 1.

3. The suction section is configured such that the connection surface of the tank-side pipeline and the connection surface of the pump-side pipeline are connected. The connection between the upstream water channel and the downstream water channel is configured such that the connection surface of the upstream water channel and the connection surface of the downstream water channel are connected. The connecting surfaces of the tank-side pipeline, the pump-side pipeline, the upstream water conduit, and the downstream water conduit are aligned so as to be parallel to each other. The flush toilet device according to feature 1.

4. The direction of flow of the cleaning water as it passes through the suction section is in the front-to-back direction. The direction of flow of the washing water as it passes through the connection between the upstream and downstream water channels is also the forward and backward direction. The flush toilet device according to feature 1.

5. The connection between the upstream water channel and the downstream water channel is located below the bowl section. The suction portion is also located below the bowl portion. A flush toilet device according to any one of claims 1 to 4.

6. All of the water conduits from the suction section to the connection between the upstream water conduit and the downstream water conduit are located on either the left or right side of the drain trap pipeline, the same side as the suction section and the pump. A flush toilet device according to any one of claims 1 to 4.

7. All of the water channels from the suction section to the connection between the upstream water channel and the downstream water channel are arranged so that they do not overlap with the drain trap pipe in a plan view. The flush toilet device according to feature 6.

8. The entire water conduit from the suction section to the connection section between the upstream water conduit and the downstream water conduit is located below the rim section. A flush toilet device according to any one of the seven features.

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