Tank device and flush toilet

Abstract

To reduce the size of a tank device for a flush toilet bowl having a jet pump mechanism by eliminating the need for a compartment container for switching between large and small flushing.SOLUTION: There is provided a tank device, in which at least a part of a jet pump unit is disposed in a submerged state in a water storage tank body. The jet pump unit comprises a throat tube having a riser tube extending upward from a suction port formed below the jet pump unit, a jet nozzle that injects flush water toward the suction opening of the throat pipe to induce a jet pumping action, and a water supply valve for stopping the supply of flush water from the water supply source to the jet nozzle. The throat tube is provided with an air inlet to introduce air into the riser tube at a predetermined water level. The air inlet changes the amount of intake air in a first flush mode and a second flush mode.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The disclosed embodiments relate to a tank apparatus and a flush toilet. [Background technology]

[0002] Conventionally, there is known a flush toilet equipped with a jet pump mechanism that uses primary water pressure from a water pipe to draw in water stored in the water storage tank body, thereby continuously supplying powerful flush water to the bowl surface of the toilet body. This flush toilet is equipped with a partitioned container inside the water storage tank body for switching between large and small flushes (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-165173 A Summary of the Invention [Problem to be solved by the invention]

[0004] In flush toilets equipped with a jet pump mechanism that uses a partitioned container, a large flush is performed by opening the partitioned container and using the water in it during flushing, and conversely, a small flush is performed by closing the partitioned container and restricting the water in it during flushing. Therefore, the partitioned container requires a volume that is greater than or equal to the difference between the large and small flushes, which creates the problem of an increased size of the tank device.

[0005] One aspect of this embodiment aims to achieve a more compact tank device in a flush toilet equipped with a jet pump mechanism by eliminating the need for a partitioned container for switching between large and small flushes. [Means for solving the problem]

[0006] a water supply valve that turns on and off the supply of flushing water from a water supply source to the jet nozzle; and a throat pipe with a riser pipe extending upward from a suction port formed below the jet pump unit; a jet nozzle that sprays flushing water toward the suction port of the throat pipe to induce a jet pump action; and a water supply valve that turns on and off the supply of flushing water from a water supply source to the jet nozzle. The throat pipe's riser pipe is provided with an air introduction section that introduces air into the riser pipe at a predetermined water level, and the air introduction section is provided with an air introduction section that changes the amount of intake air introduced into the riser pipe, and the air introduction section changes the amount of intake air introduced into the riser pipe in a first flush mode and a second flush mode.

[0007] With this configuration, the air introduction section makes it possible to change the time for discharging flush water from within the water storage tank body by changing only the amount of intake air. By changing the time for discharging flush water, the amount of flush water can be changed. For example, in the case of the first flush (large flush), the amount of flush water is increased by increasing the amount of intake air. Therefore, by changing only the amount of intake air, it is possible to realize a miniaturized tank device. Also, a difference in the amount of flush water between the first flush mode and the second flush mode can be created, and for example, a decrease in the amount of flush water in the first flush mode can be suppressed, and a decrease in the cleaning power in the first flush mode can be suppressed.

[0008] The air introduction section is formed by an opening provided in the throat pipe, and the total opening area of ​​the openings is larger in the first cleaning mode than in the second cleaning mode.

[0009] According to this configuration, the total opening area of ​​the openings can be changed depending on the cleaning mode, thereby changing the amount of intake air per unit time. By changing the amount of intake air per unit time, the amount of cleaning water can be changed depending on the cleaning mode. Therefore, by changing the total opening area of ​​the openings, it is possible to reduce the size of the tank device while suppressing a decrease in cleaning power in the first cleaning mode.

[0010] The opening has a first opening and a second opening, and in a first cleaning mode, the first opening and the second opening are set in an open state, and in a second cleaning mode, the first opening is set in an open state and the second opening is set in a closed state.

[0011] According to this configuration, as a method of changing the total opening area of ​​the openings, the number of openings that suck in air can be changed to create a difference in the amount of flush water between the first flush mode and the second flush mode. Therefore, the timing of the intake of air into the first openings can be made consistent in the first flush mode and the second flush mode, and for example, the amount of flush water at the beginning of flushing can be made consistent in the first flush mode and the second flush mode. Therefore, the flush time in the first flush mode can be extended and the amount of flush water in the first flush mode can be increased while preventing the washing power of the bowl portion at the beginning of flushing from decreasing in the first flush mode.

[0012] The opening includes a first opening and a second opening having an opening area smaller than that of the first opening, and in a first cleaning mode, the first opening is set in an open state and the second opening is set in a closed state, and in a second cleaning mode, the first opening is set in a closed state and the second opening is set in an open state.

[0013] According to this configuration, by switching the open / closed state of the first opening or the second opening, a difference in the amount of flush water between the first flush mode and the second flush mode can be achieved.

[0014] The air introduction section is characterized in that the predetermined water level at which air intake into the riser pipe is started is set lower in the first cleaning mode than in the second cleaning mode.

[0015] With this configuration, the air introduction section can start suctioning air at an early timing in the first flush mode, and the flush time in the first flush mode can be extended while reducing the amount of flush water stored in the water storage tank body. As a result, the water storage tank body can be made smaller, and the tank device can be made more compact.

[0016] The air introduction section is formed by an opening provided in the throat pipe, and the opening is formed by a first opening having an opening at a first height and a second opening having an opening at a second height lower than the first height, and in a first cleaning mode, the first opening is set in an open state and the second opening is set in a closed state, and in a second cleaning mode, the first opening is set in a closed state and the second opening is set in an open state.

[0017] According to this configuration, in the first flush mode, the flush time can be extended by starting the air intake at an early timing, and the detergency can be prevented from decreasing in the latter half of the flush. In the second flush mode, the flush time can be extended by taking in air from the second opening when the water level in the water tank drops.

[0018] The air introduction section is provided in the throat pipe and is formed by an opening whose height increases or decreases, and is characterized in that the height of the opening is set higher in the first cleaning mode than in the second cleaning mode.

[0019] According to this configuration, the difference between the first cleaning mode and the second cleaning mode can be created by the air introduction section having a simple configuration.

[0020] The first flush mode is a flush mode in which the amount of flush water is greater than that in the second flush mode, and the first flush mode is characterized in that the air introduction section is arranged so that the amount of intake air is greater than that in the second flush mode, and the air introduction section is arranged so that the amount of intake air corresponds to the first flush mode in the initial state.

[0021] With this configuration, since the initial state is the first flush mode (large flush), even if the flush mode cannot be switched due to a malfunction of the air introduction section or a power outage, there is no shortage of flush volume, so stable flushing can be performed regardless of the user's purpose.

[0022] The present invention is characterized by comprising a tank device according to any one of claims 1 to 8.

[0023] With this configuration, it is possible to change the amount of time that flush water is discharged from the water storage tank body by changing the amount of air intake using the air introduction section. By changing the amount of time that flush water is discharged, the amount of flush water can be changed. For example, in the case of the first flush (large flush), the amount of flush water is increased by increasing the amount of air intake. Therefore, by changing the amount of air intake, it is possible to create a difference between the first flush mode and the second flush mode. Effect of the Invention

[0024] A tank device according to one aspect of the embodiment can achieve miniaturization of the tank device. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a plan view showing a flush toilet equipped with a tank apparatus according to a first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 3 is a block diagram showing a basic configuration of the tank device according to the first embodiment. [Figure 4]FIG. 4 is a schematic front sectional view of a water storage tank body showing the basic configuration of the tank device according to the first embodiment. [Diagram 5] FIG. 5 is a plan view showing the internal structure of the water storage tank body of the tank apparatus according to the first embodiment. [Figure 6] FIG. 6 is an enlarged schematic view of the throat pipe and its vicinity in the tank device according to the second embodiment. [Figure 7] FIG. 7 is an enlarged schematic view of the throat pipe and its vicinity in the tank device according to the third embodiment. [Figure 8] FIG. 8 is an enlarged schematic view of the throat pipe and its vicinity in the tank device according to the fourth embodiment. [Figure 9] FIG. 9 is an enlarged schematic view of the throat pipe and its vicinity in the tank apparatus according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] (First embodiment) Hereinafter, an overview of the tank device 1 according to the first embodiment will be described with reference to the accompanying drawings.

[0027] For ease of explanation, each figure, including Figure 1, may show a three-dimensional Cartesian coordinate system that includes a Z-axis with the positive direction being the vertically upward (upward). In this case, the positive direction of the X-axis is defined as the left, the negative direction of the X-axis as the right, the positive direction of the Y-axis as the front, the negative direction of the Y-axis as the rear, the positive direction of the Z-axis as the upward direction, and the negative direction of the Z-axis as the downward direction, and the X-axis direction is called the left-right direction, the Y-axis direction is called the front-back direction, and the Z-axis direction is called the up-down direction. The left-right direction is the width direction of the flush toilet 2.

[0028] First, the basic structure of a flush toilet 2 equipped with a tank apparatus 1 according to the first embodiment will be explained with reference to Figs.

[0029] FIG. 1 is a plan view showing a flush toilet 2 equipped with a tank apparatus 1 according to the first embodiment, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

[0030] First, as shown in Figures 1 and 2, a flush toilet 2 equipped with a tank apparatus 1 according to the first embodiment is equipped with a toilet body 4. The tank apparatus 1 of this embodiment, details of which will be described later, is disposed on the upper surface of the rear side of the toilet body 4.

[0031] Next, as shown in Figures 1 and 2, the toilet body 4 has a bowl portion 6 provided on its front side, a rim portion 8 formed on the upper edge of the bowl portion 6, and a shelf portion 10 formed on the inner circumference of the rim portion 8.

[0032] Additionally, an inlet 12a of a trap drainage channel 12 opens at the bottom of the bowl portion 6 of the toilet body 4, and the trap drainage channel 12 is equipped with a trap ascending pipe 12b extending upward and a trap descending pipe 12c extending downward. As can be seen from the shape of the trap drainage channel 12, the flush toilet 2 according to this embodiment is a wash-down type toilet that discharges waste by dropping in height.

[0033] In this embodiment, a form applied to a wash-down toilet will be described, however, this is not limited to this form and can also be applied to other flush toilet forms, such as a so-called siphon toilet form in which waste material in the bowl portion 6 is sucked in using the siphon action and discharged to the outside all at once through the drain trap pipe.

[0034] Next, the toilet body 4 is equipped with a water conduit 16 into which flushing water discharged from the drain outlet 14 of the tank device 1 flows, a first rim spout 18 formed in the center of the left side when viewed from the front of the shelf portion 10, and a second rim spout 20 formed in the rear right side when viewed from the front.

[0035] In addition, the water conduit 16 branches downstream into a first water conduit 16a and a second water conduit 16b, and the flushing water in the water conduit 16 reaches the first rim outlet 18 via the first water conduit 16a, while reaching the second rim outlet 20 via the second water conduit 16b. The flushing water is discharged from the first rim outlet 18 and the second rim outlet 20, respectively, to wash the bowl portion 6 and discharge waste matter from the trap drain 12.

[0036] Next, the tank device 1 of this embodiment will be described in detail with reference to FIGS.

[0037] First, Fig. 3 is a block diagram showing the basic configuration of the tank device 1 according to the first embodiment. Also, Fig. 4 is a schematic front cross-sectional view of the water storage tank body 22 showing the basic configuration of the tank device 1 according to the first embodiment. Furthermore, Fig. 5 is a plan view showing the internal structure of the water storage tank body 22 of the tank device 1 according to the first embodiment.

[0038] In addition, in the tank device 1 shown in Figure 3, for convenience, the entire internal structure of the water storage tank main body 22 is diagrammatically simplified, and therefore the structural arrangement of the tank device 1 shown in Figures 4 and 5 is different.

[0039] Also, in the tank device 1 shown in FIG. 4, some of the structure is simplified.

[0040] First, as shown in Figures 3 to 5, the tank device 1 includes a resin outer tank T, a water storage tank body 22 which is an inner tank housed within the outer tank T, and a first water supply pipe 24 connected to a water supply source (not shown) such as a water line.

[0041] In the water storage tank body 22, a portion of the flush water supplied via the first water supply pipe 24 is stored, and can be supplied to the water passage 16 of the toilet body 4.

[0042] Also, as shown in FIG. 4, the water storage tank body 22 is positioned at a relatively low position on the rear side of the toilet body 4, and the upper end height position of the water storage tank body 22 is low, so it is a so-called low silhouette type tank, and as shown in FIG. 5, it is formed in a flat shape that is long in the left-right direction when viewed in a plane.

[0043] Next, as shown in FIGS. 3 to 5, a water supply valve device 28 that stops the supply of flush water supplied from the first water supply pipe 24 via the constant flow valve 26 is provided inside the water storage tank body 22.

[0044] The water supply valve device 28 includes a main valve 30 which is a water supply valve that opens and closes the water supply passage downstream of the constant flow valve 26 .

[0045] The tank device 1 also includes an operating device 32 (operating lever 32a, driving rotation shaft 32b) which is an operating portion for operating the water supply valve device 28 when starting a toilet flush.

[0046] Next, the internal structure and operating mechanism of the water supply valve device 28 will be described in detail with reference to Figs.

[0047] First, the water supply valve device 28 further includes a poppet valve 34, a float 36, a float-side pilot valve 38, and a float height adjustment mechanism M1.

[0048] The poppet valve 34 is an operating side pilot valve that opens and closes the main valve 30 by rotating the operating lever 32a and the drive shaft 32b of the operating device 32. The float 36 moves up and down by buoyancy according to the water level in the water storage tank body 22. The float side pilot valve 38 opens and closes the main valve 30 by the up and down movement of the float 36.

[0049] The float height adjustment mechanism M1, the details of which will be described later, is a mechanism for adjusting the height position of the float 36 in the up-down direction.

[0050] Next, the main structure of the main valve 30 portion of the water supply valve device 28 includes a main valve body 30a which is a pilot-type diaphragm valve, a main valve seat 30b on which the main valve body 30a sits, and a pressure chamber 30c in which internal pressure moves the main valve body 30a relative to the main valve seat 30b.

[0051] As a result, the water supply valve device 28 can be switched to either a water stopping state in which the main valve body 30a is seated on the main valve seat 30b to stop water flow, or a water supply state in which the main valve body 30a is separated from the main valve seat 30b to supply water.

[0052] The pressure chamber 30c is provided with a poppet hole 34a and a float-side pilot hole 38a for releasing the pressure in the pressure chamber 30c.

[0053] Furthermore, a poppet valve 34 is provided in a poppet hole 34a of the pressure chamber 30c so as to be able to open and close. The poppet valve 34 is connected to a driving rotation shaft 32b that connects the operating lever 32a and the water supply valve device 28. The driving rotation shaft 32b is rotatable about its axis in conjunction with the manual operation of the operating lever 32a by the user, and forms part of an operating section for operating the water supply valve device 28.

[0054] Furthermore, a float side pilot hole 38a of the pressure chamber 30c is provided with a float side pilot valve 38. The float side pilot valve 38 can be opened and closed by the up and down movement of the float 36 according to the water level of the flush water in the water storage tank body 22.

[0055] In addition, a bleed hole (not shown) is provided in the main valve body 30a, and when the water flow is stopped, the bleed hole (not shown) connects the primary side flow path A of the first water supply pipe 24 to the inside of the pressure chamber 30c.

[0056] The opening area of ​​the poppet hole 34a is larger than the opening area of ​​the float-side pilot hole 38a. The poppet hole 34a is located above the float-side pilot hole 38a, as shown in FIG.

[0057] Furthermore, as shown in Figure 4, the water supply valve device 28 is normally in a water-stopped state, in which the poppet hole 34a and the float side pilot hole 38a are both closed, and the primary side flow path A of the first water supply pipe 24 is connected to the pressure chamber 30c through a bleed hole (not shown).

[0058] As a result, the water pressure in the primary side flow path A of the first water supply pipe 24 and the pressure chamber 30c becomes the same water pressure (primary side flow path pressure α), and the secondary side flow path B of the first water supply pipe 24 is open to the atmosphere. Since the area on which the water pressure acts on the main valve body 30a is larger than the area of ​​the primary side flow path A, the main valve body 30a is pressed against the main valve seat 30b and is in a closed state.

[0059] Next, in the water supply valve device 28, when at least one of the conditions that the poppet hole 34a is opened by the poppet valve 34 and the condition that the float side pilot hole 38a is opened by the float side pilot valve 38 is satisfied, cleaning water flows out of the pressure chamber 30c and the pressure in the pressure chamber 30c decreases. Next, in the water supply valve device 28, when the poppet hole 34a is opened by the poppet valve 34, flush water flows out from the pressure chamber 30c, and the pressure in the pressure chamber 30c drops. Also, in the water supply valve device 28, when the float side pilot hole 38a is opened by the float side pilot valve 38, flush water flows out from the pressure chamber 30c, and the pressure in the pressure chamber 30c drops.

[0060] As a result, the main valve body 30a moves away from the main valve seat 30b to open the valve and enter a water discharge state.

[0061] In addition, in the water supply valve device 28, when the poppet hole 34a is closed by the poppet valve 34 and the float side pilot hole 38a is closed by the float side pilot valve 38, the pressure in the pressure chamber 30c again becomes the primary side flow path pressure α, the main valve body 30a moves toward the main valve seat 30b, and finally the valve is closed (water stop state).

[0062] At this time, the cleaning water in the primary side flow path A is injected little by little into the pressure chamber 30c through the bleed hole, so that the main valve body 30a is closed (water-stopped state) a predetermined time later after the poppet hole 34a and the float side pilot hole 38a are closed.

[0063] In addition, a jet pump unit 42 (details of which will be described later) connected via a vacuum breaker valve 40 is provided in the water supply passage downstream of the water supply valve device 28.

[0064] Next, the jet pump unit 42 will be described in detail with reference to FIGS.

[0065] First, the jet pump unit 42 is provided downstream of the second water supply pipe 44 extending from the vacuum breaker valve 40, and includes, from upstream to downstream, a jet nozzle 46, a flow path switching valve 48, and a throat pipe 50. The second water supply pipe 44 is formed by a highly flexible hose section 44a on the upstream side and a less flexible folded section 45 on the downstream side. Flexibility here refers to the property that an object is soft and can be bent. In other words, the higher the flexibility, the easier it is for the material to undergo elastic deformation.

[0066] In addition, each of the jet nozzle 46, the flow path switching valve 48, and the suction port 50a of the throat pipe 50 are arranged within a jet nozzle accommodating section H that protrudes downward from one of the left and right sides of the water storage tank body 22 (the right side when looking at the water storage tank body 22 from the front side in Figure 3).

[0067] The jet nozzle 46 of the jet pump unit 42 is positioned at least partially submerged inside the water storage tank body 22 and sprays cleaning water supplied from a second water supply pipe 44 extending from the vacuum breaker valve 40.

[0068] The vacuum breaker valve 40 is provided to draw in air from the outside and prevent the inside of the second water supply pipe 44 from the vacuum breaker valve 40 to the jet nozzle 46 from becoming negative pressure.

[0069] Next, the flow path switching valve 48 of the jet pump unit 42 is provided near the downstream side of the jet nozzle 46 and is capable of switching the flow path of the cleaning water sprayed from the jet nozzle 46 depending on the water level in the water storage tank main body 22.

[0070] Further, the throat pipe 50 of the jet pump unit 42 is provided in the vicinity of the downstream side of the flow path switching valve 48. A suction port 50a is formed at one end (upstream end) of the throat pipe 50, while a discharge port 50b for discharging the wash water is formed at the other end (downstream end) of the throat pipe 50.

[0071] 4, the throat pipe 50 is divided into a throat ascending pipe 50c that guides the flush water flowing in from the suction port 50a diagonally upward, and a throat downcomer pipe 50d that guides the raised flush water to the discharge port 50b, and the pipe shape is formed, for example, in an inverted U-shape (or, in other words, an inverted J-shape, or a gooseneck shape). As a result, even if the user starts the flushing operation, the flush water in the water storage tank body 22 decreases, and the part connecting the throat ascending pipe 50c and the throat downcomer pipe 50d comes out of the flush water in the water storage tank body 22, flush water can be supplied to the toilet body 4.

[0072] 4, the throat pipe 50 is provided with an air introduction section 50e for taking in air into the throat pipe 50. In the first embodiment, the air introduction section 50e is a hollow cylindrical opening that communicates with the throat riser pipe 50c and extends upward. Hereinafter, the air introduction section 50e may be described as the opening 50e.

[0073] The opening 50e is provided in the throat pipe 50, specifically, in the throat riser pipe 50c of the throat pipe 50. The opening 50e is provided in two places in the throat riser pipe 50c. That is, the opening 50e has two openings. Of the two openings 50e, the opening 50e that is taller in the vertical direction is referred to as a first opening 50e1, and the opening that is shorter in the vertical direction than the first opening 50e1 is referred to as a second opening 50e2.

[0074] The second opening 50e2 is provided with a lid 50e21 that can be switched between open and closed by rotation. The opening and closing of the lid 50e21 is performed by an actuator (not shown) that is electrically operated by the operation of the operating lever 32a by the user and the up and down movement of the float 36 as triggers. The actuator includes a gear box (not shown) having multiple gears (not shown) for increasing torque, and a DC motor (not shown) having an electrically rotatable electric rotating shaft (not shown). When the user performs a certain lever operation on the operating lever 32a, an operation signal is transmitted to the DC motor, and the electric rotating shaft rotates forward. The rotation torque of the electric rotating shaft is increased by the gear box, and the lid 50e21 is in an open state. The timing at which the open state of the lid 50e21 transitions to a closed state is the timing at which the supply of water to the bowl portion 6 is completed. In other words, when the float side pilot hole 38a is closed by the float side pilot valve 38 and the main valve body 30a has finished moving toward the main valve seat 30b, an operation signal is sent to the DC motor, the electric rotating shaft rotates in the reverse direction, and finally the lid portion 50e21 is in the closed state.

[0075] The opening 50e draws air into the throat pipe 50 during flushing, and creates a difference in the amount of flush water between the first flushing mode (large flush) and the second flushing mode (small flush) depending on the amount of air drawn in. This will be described in detail later.

[0076] In addition, because the throat pipe 50 has an upwardly convex inverted U-shape, the flush water flowing into the suction port 50a must be discharged diagonally upward from the jet nozzle 46. For this reason, the second water supply pipe 44, which guides flush water to the jet nozzle 46, changes the flow of the flush water coming downward from the vacuum breaker valve 40 installed above the water storage tank body 22, to an upward direction by means of a turning portion 45.

[0077] In addition, the flow path switching valve 48 can switch the flow path of the jetted flushing water to either a toilet flushing flow path 52 that communicates with the toilet body 4 side, or a tank water storage flow path 54 that communicates with the water storage tank body 22 side, as shown in Figure 3, depending on the water level in the water storage tank body 22.

[0078] Specifically, when flushing the bowl portion 6 of the toilet body 4, the suction port 50a of the throat pipe 50 is opened by the flow path switching valve 48, and the flush water jetted from the jet nozzle 46 flows into the suction port 50a of the throat pipe 50 through the toilet flushing flow path 52. The flush water that flows into the throat pipe 50 through the toilet flushing flow path 52 flows out from the discharge port 50b of the throat pipe 50, and is discharged from the drain port 14 of the tank device 1 to the water conduit 16 side of the toilet body 4.

[0079] On the other hand, the tank water storage flow path 54 is a flow path in which, when water is stored in the water storage tank main body 22, the suction port 50a of the throat pipe 50 is closed by the flow path switching valve 48, and the cleaning water jetted from the jet nozzle 46 is directed into the water storage tank main body 22 outside the throat pipe 50 without flowing into the throat pipe 50.

[0080] Incidentally, when the flow path switching valve 48 is set to the toilet flushing flow path 52, the jet nozzle 46 jets flush water from the suction port 50a of the throat pipe 50 toward the inside, thereby inducing a so-called "jet pump effect" in which the flow rate of flush water flowing through the throat pipe 50 is increased beyond the flow rate of flush water jetted from the jet nozzle 46. As a result, flush water at an increased flow rate is supplied from the discharge port 50b of the throat pipe 50 through the drain port 14 toward the water conduit 16 of the toilet body 4.

[0081] In addition, the term "jet pump action" used in this specification means that the forceful flow of flushing water sprayed from the jet nozzle 46 toward the suction port 50a of the throat pipe 50 creates a negative pressure that directly draws in the surrounding flushing water, such as near the suction port 50a of the throat pipe 50, without relying on other mechanical elements such as a pump, and uses the created negative pressure to transport the flushing water in the water storage tank body 22 that has been sucked into the throat pipe 50 toward the toilet body 4.

[0082] 4 and 5, an overflow pipe 56 extending in the vertical direction is provided in the water storage tank body 22. The overflow pipe 56 is provided adjacent to a throat downcomer pipe 50d extending in the vertical direction of the throat pipe 50 of the jet pump unit 42. The lower end of the overflow pipe 56 communicates with the drain outlet 14.

[0083] As a result, when the water level in the water storage tank body 22 rises above the stop water level and exceeds the position of the overflow outlet 56a of the overflow pipe 56, the flushing water flows into the overflow pipe 56 and is supplied as make-up water to the water conduit 16 of the toilet body 4 from the drain outlet 14.

[0084] Furthermore, as shown in Figs. 3 to 5, a branch pipe 58 is provided inside the water storage tank body 22, connecting a part of the tank water storage flow path 54 to the overflow port 56a.

[0085] As a result, a portion of the flush water in the tank water storage flow path 54 flows into the overflow pipe 56 via the branch pipe 58, and is supplied to the water conduit 16 of the toilet body 4 from the drain outlet 14, and is ultimately used as make-up water to form a seal in the toilet body 4.

[0086] Next, the role of the air introduction section 50e will be described. As described above, in the first embodiment, the air introduction section 50e is an opening 50e having a first opening 50e1 and a second opening 50e2. The opening 50e can suck air into the throat riser pipe 50c during jet pump operation. By changing the amount of air sucked from the opening 50e, a difference in the amount of wash water between the first wash mode and the second wash mode can be created.

[0087] The mechanism by which the amount of flush water differs between the first flush mode and the second flush mode by changing the amount of air suctioned from the opening 50e to the throat riser pipe 50c during jet pump operation will be described below. As described above, when flush water is jetted from the jet nozzle 46 toward the suction port 50a of the throat pipe 50 with force, a negative pressure is formed that draws in the surrounding flush water, such as the vicinity of the suction port 50a of the throat pipe 50. At this time, since flush water flows with force in the throat riser pipe 50c, negative pressure is formed not only in the vicinity of the suction port 50a, but also in the vicinity of the opening 50e. Depending on the vertical height position of the opening 50e and the water level in the water storage tank body 22, the material that flows into the throat riser pipe 50c from the opening 50e due to the negative pressure formed in the vicinity of the opening 50e may be air or flush water. When the substance flowing into the throat riser pipe 50c is air, the flow straightness of the flush water flowing in the throat riser pipe 50c is disturbed, and the amount of flush water passing through the throat pipe 50 per unit time is reduced. When the amount of flush water passing through the throat pipe 50 per unit time is small, the rate at which the water level in the water storage tank body 22 decreases is also small, so the main valve 30 closes late and the flush time is longer. Even if the flush time is longer, the amount of flush water in the water storage tank body 22 used for one flush does not change, but the amount of flush water flowing from the jet nozzle 46 into the throat pipe 50 increases with the flush time. In other words, if the total amount of air taken in from the opening 50e during flushing is large, the amount of flush water increases, so in the first flushing mode, the total amount of air taken in from the opening 50e is set to be larger than in the second flushing mode. Note that when the substance taken in from the opening 50e by negative pressure is water, the amount of water taken in is minute compared to the amount of water taken in from the suction port 50a, so the effect on the drop in the water level in the water storage tank body 22 is small.

[0088] In the first embodiment, in the first flushing mode, the lid portion 50e21 of the second opening 50e2 is opened. In the second flushing mode, the lid portion 50e21 of the second opening 50e2 is closed. As a result, when the water level is higher than the second opening 50e2, the rate at which the water level in the water storage tank body 22 decreases is equal in the first flushing mode and the second flushing mode. However, when the water level drops below the second opening 50e2, the first flushing mode takes in air from the second opening 50e2 into the throat riser pipe 50c by negative pressure, and the rate at which the water level in the water storage tank body 22 decreases slows. On the other hand, in the second flushing mode, when the water level drops below the second opening 50e2, only a small amount of flush water is taken in from the second opening 50e2 by negative pressure, and the rate at which the water level in the water storage tank body 22 decreases is faster than in the first flushing mode. As a result, the flushing time in the first flushing mode is longer than in the second flushing mode, and the amount of flush water supplied to the bowl portion 6 can be increased compared to the second flushing mode.

[0089] In the initial state, that is, when the user is not operating the operating lever 32a, the air introduction portion 50e is in the state in the first cleaning mode, that is, in the first embodiment, the cover portion 50e21 of the second opening 50e2 is set in the open state.

[0090] With this configuration, since the initial state is the first cleaning mode, even if the cleaning mode cannot be switched due to a failure of the air introduction part 50e (the opening 50e in the first embodiment) or a power outage, there is no shortage of cleaning amount, so stable cleaning can be performed regardless of the user's purpose.

[0091] Second embodiment Hereinafter, an overview of the tank device (not shown) according to the second embodiment will be described with reference to the accompanying drawings.

[0092] The basic structure is similar to that of the first embodiment, so a description thereof will be omitted, and an air introduction portion 65b having a different structure will be described with reference to FIG.

[0093] FIG. 6 is an enlarged schematic view of the vicinity of a throat pipe 65 of a tank device according to the second embodiment.

[0094] As shown in FIG. 6, the air introduction section 65b in the second embodiment refers to an opening 65b that communicates with the throat riser pipe 65a and has a cylindrical section 65b1 extending upward and an adjustment mechanism 65b2 that adjusts the opening area. The opening 65b is set so that the opening area is widened by the adjustment mechanism 65b2 in the first cleaning mode, and is set so that the opening area is narrowed by the adjustment mechanism 65b2 in the second cleaning mode. That is, the opening area of ​​the opening 65b in the first cleaning mode is larger than the opening area of ​​the opening 65b in the second cleaning mode. In the second embodiment, the upper end of the cylindrical section 65b1 is referred to as a cut section 65b11.

[0095] The adjustment mechanism 65b2 will now be described. The adjustment mechanism 65b2 can change the amount of protrusion of the cylindrical portion 65b1 according to the first cleaning mode or the second cleaning mode performed by the user, thereby changing the opening area of ​​the opening 65b.

[0096] The operating principle of the adjustment mechanism 65b2 may be a so-called mechanical operation in which the force applied by the user to an operating device (not shown) is transmitted through a link mechanism (not shown), or it may be an electrically operated mechanism in which an operation signal is sent to a linear motor (not shown) possessed by the adjustment mechanism 65b2, triggered by the user's operation of the operating device.

[0097] As a result, in the first flushing mode, as the water level drops during flushing, air from the opening 65b is drawn into the throat riser pipe 65a due to the negative pressure caused by water being sprayed from the jet nozzle 64, and the water level in the water storage tank body (not shown) decreases more slowly in the first flushing mode than in the second flushing mode, so that a greater amount of flushing water can be supplied to the bowl portion (not shown) in the first flushing mode compared to the second flushing mode.

[0098] As a modification for changing the opening area of ​​the opening as in the second embodiment, the opening 65b (air introduction portion 65b) may have a cut portion 65b11 on the upper surface of the throat riser pipe 65a in the extension direction of the throat riser pipe 65a, and an adjustment mechanism 65b2 that is slidable in the extension direction of the throat riser pipe 65a to change the size of the cut portion 65b11. In this case, in the first cleaning mode, the adjustment mechanism 65b2 slides in a direction such that the opening area of ​​the opening 65b is opened widely, and in the second cleaning mode, the adjustment mechanism 65b2 slides in a direction such that the opening 65b does not open or the opening area is reduced.

[0099] Third embodiment Hereinafter, an outline of a tank device (not shown) according to a third embodiment will be described with reference to the accompanying drawings.

[0100] The basic structure is similar to that of the first embodiment, so a description thereof will be omitted, and an air introduction portion 67b having a different structure will be described with reference to FIG.

[0101] FIG. 7 is an enlarged schematic view of the vicinity of a throat pipe 67 of a tank device according to the third embodiment.

[0102] 7, the air introduction section 67b in the third embodiment includes a first opening 67b1 and a second opening 67b2. The first opening 67b1 includes a cover 67b11 that can be opened or closed by rotating. The second opening 67b2 includes a cover 67b21 that can be opened or closed by rotating.

[0103] In the first flushing mode, the lid 67b11 of the first opening 67b1 is opened, and the lid 67b21 of the second opening 67b2 is closed. In the second flushing mode, the lid 67b11 of the first opening 67b1 is closed, and the lid 67b21 of the second opening 67b2 is opened. As a result, the timing from the start of flushing until air is taken into the throat riser pipe 67a due to the negative pressure caused by the water discharged from the jet nozzle 66 is faster in the first flushing mode than in the second flushing mode. As a result, the rate at which the water level in the water storage tank body (not shown) decreases is faster in the second flushing mode, so that the first flushing mode can supply a larger amount of flush water to the bowl portion 6 (not shown) than in the second flushing mode.

[0104] In addition, as a method of changing the amount of intake air to the throat riser pipe 65a in the first and second flushing modes, the first opening 67b1 and the second opening 67b2 may be set at the same height in the vertical direction. In this case, the opening area of ​​the first opening 67b1 is made larger than the opening area of ​​the second opening 67b2, and in the first flushing mode, the lid portion 67b11 of the first opening 67b1 is opened and the lid portion 67b21 of the second opening 67b2 is closed. In the second flushing mode, the lid portion 67b11 of the first opening 67b1 is closed and the lid portion 67b21 of the second opening 67b2 is opened.

[0105] As a result, in the first flush mode, the area available for sucking in air is larger than in the second flush mode, and the rate at which the water level in the water tank body decreases is slower in the second flush mode, so that a larger amount of flush water can be supplied to the bowl portion 6 in the first flush mode than in the second flush mode.

[0106] (Fourth embodiment) Hereinafter, an overview of the tank device (not shown) according to the fourth embodiment will be described with reference to the accompanying drawings.

[0107] The basic structure is similar to that of the first embodiment, so a description thereof will be omitted, and an air introduction portion 69b having a different structure will be described with reference to FIG.

[0108] FIG. 8 is an enlarged schematic view of the vicinity of a throat pipe 69 of a tank device according to the fourth embodiment.

[0109] As shown in Fig. 8, the air introduction section 69b in the fourth embodiment refers to an opening 69b having a cylindrical section 69b1 that communicates with the throat riser pipe 69a and extends upward, and an adjustment mechanism 69b2 that adjusts the opening position. The opening 69b is set to have a higher opening position by the adjustment mechanism 69b2 in the first cleaning mode, and is set to have a lower opening position by the adjustment mechanism 69b2 in the second cleaning mode. That is, the opening position of the opening 69b in the first cleaning mode is higher than the opening position of the opening 69b in the second cleaning mode. In the fourth embodiment, the upper end of the cylindrical section 69b1 is referred to as a cut section 69b11.

[0110] As shown in Fig. 8, the adjustment mechanism 69b2 is a vertically long hollow cylinder having a hole 69b21 on the side for allowing cleaning water and air to flow into the throat riser pipe 69a, and a male screw portion 69b22 inside the cylinder. The cylindrical portion 69b1 has a female screw portion 69b12 on the side 69b13 that pairs with the male screw portion 69b22 of the adjustment mechanism 69b2. The adjustment mechanism 69b2 can be moved up and down relative to the cylindrical portion 69b1 by being rotated. The adjustment mechanism 69b2 is fixed by the male screw portion 69b22 meshing with the female screw portion 69b12.

[0111] The adjustment mechanism 69b2 is provided with an external or internal stepping motor (not shown) that has an electrically rotatable electric rotating shaft (not shown). The operation of the user's operating lever (not shown) and the up and down movement of the float (not shown) are used as triggers to transmit an operation signal to the stepping motor, which rotates the electric rotating shaft. The rotation of the electric rotating shaft causes the adjustment mechanism 69b2 itself to rotate horizontally around the cylindrical portion 69b1. The adjustment mechanism 69b2 moves vertically along the cylindrical portion 69b1 by tightening or loosening the male screw portion 69b22 and the female screw portion 69b12 as the adjustment mechanism 69b2 itself rotates, and moves vertically between a first predetermined position and a second predetermined position.

[0112] The height of the adjustment mechanism 69b2 relative to the cylindrical portion 69b1 is higher at the first predetermined position than at the second predetermined position. That is, the adjustment mechanism 69b2 at the first predetermined position is located higher than the adjustment mechanism 69b2 at the second predetermined position.

[0113] In the first cleaning mode, the adjustment mechanism 69b2 is in a first predetermined position. In the second cleaning mode, the adjustment mechanism 69b2 is in a second predetermined position. Therefore, in the first cleaning mode, the position of the hole 69b21 is set higher by the adjustment mechanism 69b2 than the position of the hole 69b21 in the second cleaning mode.

[0114] As a result, the first flush mode is faster than the second flush mode in the timing from the start of flushing until air is drawn into the throat riser pipe 69a at the opening 69b due to the negative pressure caused by the water discharged from the jet nozzle 68. As a result, the second flush mode is faster in decreasing the water level in the water storage tank body (not shown), so the first flush mode can supply a larger amount of flush water to the bowl portion (not shown) than the second flush mode.

[0115] Fifth embodiment Hereinafter, an overview of a tank device (not shown) according to a fifth embodiment will be described with reference to the accompanying drawings.

[0116] The basic structure is similar to that of the first embodiment, so a description thereof will be omitted, and an air introduction portion 71b having a different structure will be described with reference to FIG.

[0117] FIG. 9 is an enlarged schematic view of the vicinity of a throat pipe 71 of a tank device according to the fifth embodiment.

[0118] As shown in FIG. 9, the air introduction section 71b in the fifth embodiment refers to an opening 71b having a cylindrical section 71b1 that communicates with the throat riser pipe 71a and extends upward, and an adjustment mechanism 71b2 that adjusts the opening area and the opening position. The opening 71b is set so that the opening area is enlarged and the opening position is raised by the adjustment mechanism 71b2 in the first cleaning mode, and is set so that the opening area is narrowed and the opening position is lowered by the adjustment mechanism 71b2 in the second cleaning mode. That is, the opening area of ​​the opening 71b in the first cleaning mode is larger than the opening area of ​​the opening 71b in the second cleaning mode. Also, the opening position of the opening 71b in the first cleaning mode is higher than the opening position of the opening 71b in the second cleaning mode. In the fifth embodiment, the upper end of the cylindrical section 71b1 is referred to as a cut section 71b11.

[0119] As shown in Fig. 9, the adjustment mechanism 71b2 is a vertically long hollow cylinder having a hole 71b21 on the side for allowing cleaning water and air to flow into the throat riser pipe 71a, and a male screw portion 71b22 inside the cylinder. The cylindrical portion 71b1 has a female screw portion 71b12 on the side 71b13 that pairs with the male screw portion 71b22 of the adjustment mechanism 71b2. The adjustment mechanism 71b2 can be moved up and down relative to the cylindrical portion 71b1 by being rotated. The adjustment mechanism 71b2 is fixed by the male screw portion 71b22 meshing with the female screw portion 71b12.

[0120] The adjustment mechanism 71b2 is provided with an external or internal stepping motor (not shown) that has an electrically rotatable electric rotating shaft (not shown). The operation of a user's operating lever (not shown) and the up and down movement of a float (not shown) are used as triggers to transmit an operation signal to the stepping motor, which rotates the electric rotating shaft. The rotation of the electric rotating shaft causes the adjustment mechanism 71b2 itself to rotate horizontally around the cylindrical portion 71b1. The adjustment mechanism 71b2 moves vertically along the cylindrical portion 71b1 by tightening or loosening the male screw portion 71b22 and the female screw portion 71b12 as the adjustment mechanism 71b2 itself rotates, and moves vertically between a first predetermined position and a second predetermined position.

[0121] The first predetermined position is higher than the second predetermined position in terms of the height of the adjustment mechanism 71b2 relative to the cylindrical portion 71b1. That is, the adjustment mechanism 71b2 at the first predetermined position is located higher than the adjustment mechanism 71b2 at the second predetermined position. When the adjustment mechanism 71b2 is at the first predetermined position, at least a part of the hole 71b21 is not blocked by the cylindrical portion 71b1. When the adjustment mechanism 71b2 is at the second predetermined position, a part of the hole 71b21 is blocked by the side surface 71b13 of the cylindrical portion 71b1. The first predetermined position may be the same as the first predetermined position in the fourth embodiment, or may be a different position. The second predetermined position may be the same as the second predetermined position in the fourth embodiment, or may be a different position.

[0122] In the first cleaning mode, the adjustment mechanism 71b2 is in a first predetermined position. In the second cleaning mode, the adjustment mechanism 71b2 is in a second predetermined position. Therefore, in the first cleaning mode, the opening area of ​​the opening 71b is made larger by the adjustment mechanism 71b2 than the opening area of ​​the opening 71b in the second cleaning mode. In addition, in the first cleaning mode, the position of the hole 71b21 is made higher by the adjustment mechanism 71b2 than the position of the hole 71b21 in the second cleaning mode.

[0123] In the first flush mode, as the water level drops during flushing, air from the hole 71b21 is drawn into the throat riser pipe 65a by the negative pressure caused by the water discharged from the jet nozzle (not shown), slowing down the drop in the water level in the water storage tank body (not shown). On the other hand, in the second flush mode, the hole 71b21 is partially blocked by the side surface 71b13 of the cylindrical portion 71b1, preventing the inflow of air from the cutout portion 71b11, so that the rate at which the water level in the water storage tank body drops is faster than in the first flush mode. As a result, the first flush mode can supply a larger amount of flush water to the bowl portion (not shown) than the second flush mode.

[0124] In addition, in the first flush mode, the position of the hole 71b21 is set higher than in the second flush mode, so the timing until the water is taken into the throat riser pipe 71a is earlier in the first flush mode than in the second flush mode. As a result, the rate at which the water level in the water storage tank body (not shown) decreases is faster in the second flush mode, so the first flush mode can supply a larger amount of flush water to the bowl portion (not shown) than in the second flush mode.

[0125] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0126] 1 Tank device 2 Flush toilet 4. Toilet body 6 Bowl section 8 Rim 10 Shelf 12 Trap drain 12a Trap drain inlet 12b Trap riser 12c Trap Downcomer 14 Drain 16 Water channel of the toilet body 16a First Waterway 16b Second Waterway 18 First rim outlet 20 Second rim outlet 22 Water tank body 24 First water supply pipe 26 Constant flow valve 28 Water supply valve device 30 Main valve (water supply valve) 30a Main valve body 30b Main valve seat 30c Pressure chamber 32 Operation device (operation unit) 32a Operating lever (operating part) 32b Drive shaft (operation part) 34 Poppet valve 34a Poppet hole 36 Float 38 Float side pilot valve 38a Float side pilot hole 40 Vacuum breaker valve 42 Jet pump unit 44 Second water supply pipe 44a Hose part 46 Jet Nozzle 45 Folded part 48 Flow path switching valve 50 Throat tube 50a Suction port 50b outlet 50c throat riser 50d throat downcomer 50e Air intake section (opening) 50e1 First opening 50e2 Second opening 50e21 Lid 52 Toilet flushing channel 54 Tank water storage channel 56 Overflow pipe 56a Overflow port 58 Branch Pipe 64 Jet Nozzle 65 Throat Tube 65a throat riser 65b Air inlet (opening) 65b1 Cylindrical section 65b11 Cut section 65b2 Adjustment mechanism 66 Jet Nozzle 67 Throat Tube 67a Throat riser 67b Air intake section (opening) 67b1 First opening 67b11 Lid 67b2 Second opening 67b21 Lid 69 Throat Tube 69a Throat riser 69b Air inlet (opening) 69b1 Cylindrical part 69b11 Cut section 69b12 Female thread 69b13 Side 69b2 Adjustment mechanism 69b21 Hole 69b22 Male thread 71 Throat Tube 71a Throat riser 71b Air inlet (opening) 71b1 Cylindrical part 71b11 Cut section 71b12 Female thread 71b13 Side 71b2 Adjustment mechanism 71b21 Hole 71b22 Male thread A Primary flow path of water supply pipe B Secondary flow path of water supply pipe T Exterior tank

Claims

1. A bowl portion for receiving waste; A toilet body having a water channel for directing flushing water to the bowl portion; a water storage tank body that stores flush water to be supplied to the toilet body; a jet pump unit that supplies flush water in the water storage tank to the toilet body, At least a portion of the jet pump unit is disposed submerged in the water storage tank body, The jet pump unit includes: a throat pipe having an uprising pipe extending upward from a suction port formed below the jet pump unit; a jet nozzle that injects cleaning water toward the suction port of the throat pipe to induce a jet pump action; a water supply valve for supplying and stopping the supply of cleaning water from a water source to the jet nozzle, The riser pipe of the throat pipe is provided with an air introduction portion that introduces air into the riser pipe at a predetermined water level, the water storage tank body is provided with an operation unit that switches between a first flush mode, which is a large flush, and a second flush mode, which is a small flush, and starts water supply, and is configured to change the amount of air intake in the first flush mode and the second flush mode in response to operation of the operation unit; Furthermore, the tank device is configured such that the air introduction section is set so that the amount of intake air in the first flushing mode is greater than the amount of intake air in the second flushing mode, so that the amount of flushing water drawn into the water storage tank by the jet pump action in the first flushing mode is less than in the second flushing mode, and by slowing the drop in the level of flushing water in the water storage tank in the first flushing mode compared to the second flushing mode, the time for which flushing water is supplied to the toilet body is longer, and the amount of flushing water supplied from the jet nozzle in the first flushing mode is greater than in the second flushing mode.

2. The air introduction section is formed by an opening provided in the throat pipe, 2. The tank device according to claim 1, wherein a total opening area of ​​the openings is larger in the first cleaning mode than in the second cleaning mode.

3. The opening includes a first opening and a second opening, In the first cleaning mode, the first opening and the second opening are set in an open state, The tank device according to claim 2, characterized in that, in the second cleaning mode, the first opening is set in an open state, and the second opening is set in a closed state.

4. The opening is A first opening; A second opening having an opening area smaller than that of the first opening, In the first cleaning mode, the first opening is set in an open state and the second opening is set in a closed state; The tank device according to claim 2, characterized in that, in the second cleaning mode, the first opening is set in a closed state, and the second opening is set in an open state.

5. 2. The tank device according to claim 1, wherein the air introduction section is set so that the predetermined water level at which air intake into the riser pipe begins is higher in the first cleaning mode than in the second cleaning mode.

6. The air introduction section is formed by an opening provided in the throat pipe, The opening is formed by a first opening having an opening at a first height and a second opening having an opening at a second height lower than the first height, In the first cleaning mode, the first opening is set in an open state and the second opening is set in a closed state; The tank device according to claim 5, characterized in that, in the second cleaning mode, the first opening is set in a closed state, and the second opening is set in an open state.

7. The air introduction section is provided in the throat pipe and is formed by an opening whose height increases or decreases, The tank device according to claim 5, wherein the height of the opening is set higher in the first cleaning mode than in the second cleaning mode.

8. The first flushing mode is a flushing mode in which the amount of flushing water is greater than that of the second flushing mode, 8. A tank device as described in any one of claims 1 to 7, characterized in that the air introduction section is arranged so that the amount of intake air in the first cleaning mode is greater than the amount of intake air in the second cleaning mode, and is arranged so that the amount of intake air corresponds to the first cleaning mode in an initial state.

9. A flush toilet comprising the tank apparatus according to any one of claims 1 to 8.

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