JP2019167789A - Washing water tank device - Google Patents

Abstract

To provide a washing water tank device capable of suppressing the occurrence of residual water in a pressure chamber when draining water and suppressing a failure of a water supply device due to freezing of the residual water.SOLUTION: A water supply device 32 of a washing water tank device 18 of the present invention comprises: a first water supply flow path 60 that supplies washing water from a water supply source; a second water supply flow path 64 that supplies washing water to a water supply port of the washing water tank; a main valve seat 56 that is provided between the first water supply flow path and the second water supply flow path; a diaphragm valve body 58 that is seated on the main valve seat; a pressure chamber 62; a first flow path 66 that extends from the pressure chamber; a second flow path 68 that extends from the pressure chamber; a first opening/closing valve device 52 that opens and closes the first flow path; and a second opening/closing valve device 54 that opens and closes the second flow path. The second flow path 68 extends upward from the pressure chamber 62, and the first flow path 66 is connected to a lower portion of the pressure chamber 62 and forms an outflow path through which washing water in the pressure chamber 62 flows downward.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a washing water tank apparatus, and more particularly to a washing water tank apparatus for storing washing water for washing a toilet.

  2. Description of the Related Art Conventionally, there has been known a problem that cleaning water in a cleaning water tank apparatus is frozen in a cold region. In particular, when the washing water freezes in the washing water flow path of the water supply device provided in the washing water tank device, the water supply device malfunctions such as malfunction of the water supply device or causing damage to the water supply device. There is a problem.

  As described in Patent Document 1, a cold district specification ball tap has been proposed as a water supply device for a washing water tank device. In this water supply device, the ball tap is opened by the operation unit so that water always flows from the ball tap to prevent the ball tap from being broken due to freezing.

JP-A-2015-190177 JP 2014-70415 A

  As described in Patent Document 1, although water can be prevented from freezing in the water supply device by continuing to pass water through the water supply device of the washing water tank device, a large amount of water is constantly flowed. From the viewpoint of saving water.

  Therefore, as a countermeasure against freezing, it has been studied to prevent freezing of the cleaning water remaining in the flow path in the water supply apparatus by providing a heater in the water supply apparatus of the cleaning water tank apparatus. However, if the water supply device is provided with a separate heater, the function of preventing the washing water from being frozen cannot be maintained unless the heater is kept operating, and the water supply device is increased in size and cost. Problems arise. Therefore, there is a problem that it is difficult to adopt a heater in the water supply device.

In order to solve such a problem, the inventors of the present invention conducted diligent research on draining water from the flow path in the water supply apparatus to suppress residual water in the flow path and suppress freezing of the residual water. .
In recent years, there has been a demand for a water supply apparatus that can supply water to the cleaning water tank apparatus even in the event of a power failure. As described in Patent Document 2, a pilot flow path that is opened and closed by a valve body of an electromagnetic valve device and a pilot flow path that is opened and closed by a valve body of a mechanical on-off valve device so that a cleaning operation can be performed even during a power failure The water supply apparatus provided with these is proposed. In this way, in the water supply apparatus that can supply water even in the event of a power failure, since two pilot flow paths and a pressure chamber are provided, more flow paths are formed than in the prior art, and residual water in the water supply apparatus is more likely to occur when draining water. Therefore, the problem of causing a failure of the water supply device due to freezing has become more prominent.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and can suppress the occurrence of residual water in the pressure chamber when draining water, and the water supply device can be damaged due to freezing of the residual water. It is an object of the present invention to provide a cleaning water tank device that can suppress the occurrence of the cleaning water tank.

In order to achieve the above object, the present invention relates to a washing water tank device for storing washing water for washing a toilet, wherein the washing water tank stores washing water, and the washing water is supplied into the washing water tank. The water supply device, wherein the water supply device supplies cleaning water to a first water supply channel for supplying cleaning water from a water supply source outside the cleaning water tank, and to a water supply port inside the cleaning water tank. A second water supply channel to be supplied, a main valve seat provided between the first water supply channel and the second water supply channel, and a seat on the main valve seat to close the second water supply channel A diaphragm valve body that switches between a water-stopping state that is separated from the main valve seat and a water-supplying state that opens the second water supply passage, and when the internal pressure rises, the diaphragm valve body is moved toward the main valve seat. When the internal pressure drops, the diaphragm valve body is moved to the main A pressure chamber that is moved away from the seat, a first flow path that extends from the pressure chamber so that the internal pressure of the pressure chamber can be released, and an internal pressure of the pressure chamber that extends from the pressure chamber. A second opening and closing valve device for opening and closing the second flow path; and a second opening and closing valve device for opening and closing the second flow path, wherein the second flow path is located above the pressure chamber. Further, the first flow path is connected to a lower portion of the pressure chamber and forms an outflow passage for allowing the wash water in the pressure chamber to flow downward.
In the present invention configured as described above, when the first water supply channel and the washing water tank are drained, the first on-off valve device opens the first channel, thereby cleaning the pressure chamber. Water can flow out downward through the first flow path. Therefore, it is possible to suppress the occurrence of residual water in the pressure chamber where it is difficult for the washing water to escape from the first water supply flow path side when draining water, and it is possible to prevent the water supply device from being damaged by freezing of this residual water in the pressure chamber. it can.
Further, since the second flow path extends upward from the pressure chamber, the washing water in the second flow path can flow down to the pressure chamber when draining, and further, the second flow path is lowered from the pressure chamber by the first flow path. Can be drained into. Therefore, it is possible to suppress the generation of residual water in the second flow path at the time of draining water, and it is possible to suppress the water supply apparatus from malfunctioning due to the residual water freezing in the second flow path.

In the present invention, it is preferable that the second on-off valve device includes a float that moves up and down in response to fluctuations in the level of the wash water in the wash water tank, and a valve body that mechanically transmits the operation of the float. And opening and closing the second flow path when the valve body is seated on a valve seat provided on the second flow path.
In the present invention configured as described above, the valve that mechanically transmits the operation of the float of the second on-off valve device through the second flow path that extends upward from the pressure chamber and hardly causes freezing of residual water. Open and close by the body. For this reason, even if residual water is generated in the first flow path after draining and the residual water is frozen in the first flow path, the return to the first water supply flow path is achieved by returning from the drained state. When supplying the cleaning water, the second flow path is not frozen, so that the water can be supplied from the first water supply path to the cleaning water tank through the second water supply path, and the water level in the cleaning water tank is When the float rises and the float rises, the valve body is seated on the valve seat provided on the second flow path, so that the second flow path can be closed and the diaphragm valve body can be closed. Therefore, water supply can be realized up to a full water level at which the float rises in the washing water tank while saving the user from performing a special operation when returning from drainage.

In the present invention, preferably, the first on-off valve device includes an electrically operated electromagnetic valve mechanism and a first valve body operated by the electromagnetic valve mechanism, and is provided on the first flow path. When the first valve body is seated on the first valve seat, the first flow path is opened and closed.
In the present invention configured as described above, the electrically operated electromagnetic valve mechanism functions as a heater, thereby suppressing freezing of the first flow path through which the wash water flowing down from the pressure chamber and the second flow path passes. Can be made. Thereby, it is possible to suppress the occurrence of residual water in the first flow path at the time of draining water and the failure of the water supply device due to the residual water being frozen in the first flow path. In addition, even if residual water is generated in the first flow path and this residual water is frozen in the first flow path, the electromagnetic valve mechanism is made to function as a heater so that the first flow path The ice can be easily melted.

In the present invention, preferably, the first flow path forms a downward outlet at the downstream end thereof.
In the present invention configured as described above, since the first flow path forms a downward outlet at the downstream end thereof, the water can be easily discharged from the first flow path. Residual water can hardly be generated in the flow path. Therefore, it is possible to further suppress the generation of residual water in the first flow path at the time of draining water, and it is possible to further suppress the failure of the water supply device by freezing the residual water in the first flow path.

In the present invention, preferably, the second flow path forms an upward outlet at the downstream end thereof.
In the present invention configured as described above, the second flow path forms an upward outlet at the downstream end thereof, so that water can easily flow out from the second flow path to the pressure chamber side. It is possible to make it difficult to produce residual water in the second flow path. Therefore, it is possible to further suppress the generation of residual water in the second flow path at the time of draining water, and it is possible to further suppress the failure of the water supply device by freezing the residual water in the second flow path.

  According to the washing water tank apparatus of the present invention, it is possible to suppress the occurrence of residual water in the pressure chamber when draining water, and it is possible to suppress the failure of the water supply apparatus due to freezing of the residual water.

It is sectional drawing of the flush toilet to which the flush water tank apparatus by one Embodiment of this invention was applied. It is a top view of the washing water tank device by one embodiment of the present invention. It is a front view of the washing water tank device by one embodiment of the present invention. It is the top view which looked at the washing water tank device by one embodiment of the present invention from the upper part in the state where the 2nd lid-like member was removed. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is a front view of the water supply apparatus of the washing water tank apparatus by one Embodiment of this invention. It is sectional drawing seen along the VIII-VIII line of FIG. It is a figure which shows a mode that both the 1st pilot flow path and the 2nd pilot flow path are made into the open state, and the diaphragm valve body is made into the closed state in the water supply apparatus of FIG.

Next, a cleaning water tank apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied will be described with reference to FIG.
FIG. 1 is a sectional view of a flush toilet to which a flush water tank apparatus according to an embodiment of the present invention is applied.

As shown in FIG. 1, reference numeral 1 denotes a flush toilet. The flush toilet 1 includes a toilet body 2, and the toilet body 2 includes a bowl portion 4, a water conduit 6, and a bowl portion 4. A drain trap pipe 8 communicating with the lower part is formed.
On the upper edge of the bowl portion 4 of the toilet body 2, there are formed a rim 10 overhanging on the inside and a first water discharge port 12 for discharging the wash water supplied from the water conduit 6. The wash water discharged from the water descends while swirling to wash the bowl portion.

Below the bowl portion 4, there is formed a water storage portion 14 whose storage surface W ₀ is indicated by a one-dot chain line. Below the water reservoir 14, an inlet 8a of the drain trap pipe 8 opens, and an ascending path 8b extends rearward from the inlet 8a. A descending path 8c continues to the ascending path 8b, and a lower end of the descending path 8c is connected to a discharge pipe (not shown) under the floor via a drain socket (not shown). In addition, a second water discharge port 16 for discharging the cleaning water supplied from the water conduit 6 is formed above the storage surface W ₀ of the bowl portion 4, and the cleaning water discharged from the second water discharge port 16 A swirling flow that swirls the water stored in the water storage section 14 in the vertical direction is generated.

  Above the water conduit 6 of the toilet body 2, there is provided a cleaning water tank device 18 for storing the cleaning water supplied to the toilet body 2, and the cleaning water stored in the cleaning water tank device 18 is supplied to the toilet body 2. It has come to be. The washing water tank device 18 is a so-called low silhouette tank formed with a relatively low height. As will be described later, the washing water tank device 18 has a function of suppressing a failure of the water supply device 32 due to freezing. Further, the cleaning water tank device 18 has a function of storing cleaning water at the time of a power failure. The washing water tank device 18 is covered with an exterior cover 19. The washing water tank device 18 includes a washing water tank 20 for storing washing water to be supplied to the toilet. A drain port 22 extending in the vertical direction is formed at the bottom of the washing water tank 20. The lower end communicates with the water conduit 6 of the toilet body 2, and the cleaning water in the cleaning water tank 20 is supplied from the drain port 22 to the water conduit 6 of the toilet body 2.

  The toilet body 2 is provided with a control unit 21 that can control the operation of the washing water tank device 18 on a substrate 35 described later. The control unit 21 is provided on a wall surface by wire or wirelessly, and an operation unit (not shown) that allows a user to operate the start of cleaning, a float switch 28 described later, a rotation device 38, and an electric flow path of the water supply device 32. It is electrically connected to the switchgear 52 and the like. The control unit 21 includes a CPU, a memory, and the like, and has a function of operating each device and the like by sending an operation signal to each of these devices and the like according to operation of the operation unit or self setting.

Next, details of the washing water tank apparatus 18 will be described with reference to FIGS.
2 is a top view of a cleaning water tank apparatus according to an embodiment of the present invention, FIG. 3 is a front view of the cleaning water tank apparatus according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention. FIG. 5 is a top view of the washing water tank device as viewed from above with the second lid-like member removed, FIG. 5 is a cross-sectional view taken along line V-V in FIG. 2, and FIG. It is sectional drawing seen along the VI-VI line. In FIG. 5, the full water level when the washing water tank is full is indicated by WL1.
Hereinafter, in the description of an embodiment of the present invention, the user side using the flush toilet 1 (the user side standing in front of the flush toilet 1 to use the flush toilet 1) is in front. The front side (front side) is the rear side when viewed from the user, the right side is the right side when viewed from the front, and the left side is the left side when viewed from the front. 18 is described with the right side or the left side as the side when viewed from the front.

  As shown in FIGS. 2 to 6, the cleaning water tank apparatus 18 stores the cleaning water and has the first opening 24 formed in the upper part thereof, and the cleaning water tank 20 stores the cleaning water tank 20. The drain valve device 26 that opens the drain port 22 to the flush water 6 of the toilet body 2 for the washed water, the float switch 28 that electrically detects the full water level WL1 of the wash water tank 20, and the wash water tank 20 A water supply pipe 30 that supplies cleaning water from an external water supply source to the cleaning water tank 20, a water supply device 32 that supplies the cleaning water into the cleaning water tank 20, and a lid-like member 33 that covers the first opening 24. And a substrate 35 (see FIG. 1) for supporting the cleaning water tank 20.

As shown in FIG. 5, the drain valve device 26 includes an overflow pipe 34, a drain valve 36 fixed to the lower end of the overflow pipe 34, and a circuit that opens and closes the drain valve 36 by moving the overflow pipe 34 up and down. A moving device 38 is provided. The drain valve 36 is seated on a drain valve seat 37 provided on the bottom surface of the cleaning water tank 20 to seal the drain port 22.
A guide member 40 that guides the vertical movement of the drain valve 36 and regulates the height position is attached to the periphery of the drain port 22 of the cleaning water tank 20.

  The overflow pipe 34 is a cylindrical pipe member extending in the vertical direction. When the water level of the cleaning water in the cleaning water tank 20 rises above the full water level WL1 and exceeds the height position of the upper end of the overflow pipe 34, the cleaning water overflows, and the upper end of the overflow pipe 34 It passes through the inside of the cylindrical tube and is supplied from the drain port 22 of the washing water tank 20 to the toilet body 2 side.

Further, the rotating device 38 is a driving device provided with driving means such as a DC motor, and a ball chain 44 is attached to the tip of a rotating shaft 42 extending from the rotating device 38. The lower part of the ball chain 44 is attached to the overflow pipe 34. When the rotation shaft 42 is rotated so that the rotation device 38 pulls the ball chain 44 upward, the overflow pipe 34 rises together with the ball chain 44, and the rotation device 38 rotates the rotation shaft 42 so as to lower the ball chain 44. If it does, the overflow pipe 34 will descend | fall with the ball chain 44. FIG.
The rotation device 38 includes a manual operation mechanism that allows a user to directly rotate an operation lever (not shown) to rotate the rotation shaft 42 to open and close the drain valve 36 in the event of a power failure. .

  The float switch 28 is disposed above the inside of the cleaning water tank 20 and is attached so that the axial center portion thereof faces downward from the top of the cleaning water tank 20. The float switch 28 electrically detects a predetermined full water level WL <b> 1 and transmits the detection signal to the control unit 21.

  As shown in FIG. 6, the water supply pipe 30 is disposed so as to rise from the floor surface or wall surface of the building to the height of the lower portion of the cleaning water tank 20 on the side of the center of the cleaning water tank 20. The water supply pipe 30 is disposed outside the toilet body 2 and the washing water tank 20. The water supply pipe 30 is formed by a flexible pipe such as a hose. The water supply pipe 30 is connected to a connection portion 48 described later of the water supply device 32.

  As shown in FIGS. 2 and 4, the lid-like member 33 is formed so as to partially cover the first opening 24 and forms a second opening 25 smaller than the first opening 24. A member 80 and a second lid member 82 that covers the second opening 25 are provided. By combining the first lid-like member 80 and the second lid-like member 82, an attachment portion 73 (see FIG. 5) between the first lid-like member 80 and the second lid-like member 82. 8)).

Next, a specific configuration of the water supply device 32 of the cleaning water tank device according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 7 is a front view of a water supply device of a cleaning water tank apparatus according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG.

  The water supply device 32 extends from the water supply port portion 46 provided inside the wash water tank 20, a connection portion 48 connected to the water supply pipe 30 outside the wash water tank 20, and the connection portion 48 to the water supply port portion 46. The water supply flow path 50, the electrically operated flow path opening / closing device 52 that is a first on-off valve device that opens and closes the water supply flow path 50 by the electromagnetic valve mechanism 72 provided outside the lid-like member 33, and the inside of the washing water tank 20 And a mechanical flow path opening / closing device 54 that is a second open / close valve device that opens and closes the water supply flow path by a mechanical mechanism provided in the vehicle.

  Furthermore, the water supply device 32 is provided with a main valve seat 56 provided in the water supply flow channel 50 and a water stop state in which the water supply device 32 is provided in the water supply flow channel 50 and is seated on the main valve seat 56 to close the secondary side water passage 64. A diaphragm valve body 58 that is a diaphragm valve that switches between a water supply state that is spaced apart from the main valve seat 56 and opens the secondary side water passage 64, and a water supply source outside the wash water tank 20 among the water supply passages 50. The primary side water passage 60, which is a first water supply channel for supplying the cleaning water, and the water supply channel 50 provided on the side opposite to the main valve seat 56 side of the diaphragm valve body 58, and the pressure of the internal cleaning water varies. The secondary water passage 64 that is the second water supply channel for supplying the cleaning water to the water supply port 46 inside the cleaning water tank 20, and the inside of the pressure chamber 62. Pressure chamber 6 so that the pressure can be released to washing water tank 20 From the pressure chamber 62 to the washing water tank 20 so that the internal pressure of the pressure chamber 62 can be released to the washing water tank 20. And a second pilot flow path 68 which is a road.

The main valve seat 56 is provided at the inlet end of the secondary side water passage 64. The main valve seat 56 is provided between the primary side water passage 60 and the secondary side water passage 64.
The diaphragm valve body 58 is formed with a bleed hole (not shown) that allows the primary water passage 60 and the pressure chamber 62 to communicate with each other. The diaphragm valve body 58 moves so as to contact the main valve seat 56 or move away from the main valve seat 56 due to a pressure difference between the internal pressure of the pressure chamber 62 and the water pressure of the primary water passage 60. is set up. When the diaphragm valve body 58 is closed by the bleed hole formed in the diaphragm valve body 58, the primary side water passage 60 and the pressure chamber 62 communicate with each other, and the water pressure from the primary side water passage 60 is communicated with the pressure chamber 62. Has come to work.

  The pressure chamber 62 moves the diaphragm valve body 58 toward the main valve seat 56 when the internal pressure increases, and moves the diaphragm valve body 58 away from the main valve seat 56 when the internal pressure decreases.

  The electric channel opening / closing device 52 is an electrically controlled electromagnetic valve device. The electric flow path opening / closing device 52 is seated on the first valve seat 66a of the first pilot flow path 66 and is configured to be able to close the first pilot flow path 66, and a control unit. And an electromagnetic valve mechanism 72 that is electrically operated by the motor 21. The first valve body 70 is operated by an electromagnetic valve mechanism 72. When the float switch 28 does not electrically detect the full water level WL1 of the washing water tank 20, the electric flow path opening / closing device 52 moves the first valve body 70 away from the first valve seat 66a to the first. When the pilot flow path 66 is opened and the float switch 28 is electrically detecting the full water level WL1 of the washing water tank 20, the first valve body 70 is pressed against the first valve seat 66a to be closed. One pilot flow channel 66 is closed. The electric channel opening / closing device 52 opens and closes the first pilot channel 66 when the first valve body 70 is seated on a first valve seat 66 a provided on the first pilot channel 66.

  Since the electromagnetic valve mechanism 72 can generate heat when energized, the electromagnetic valve mechanism 72 can function as a heater under the control of the control unit 21. For example, the electromagnetic valve mechanism 72 can function as a heater when the first valve body 70 is opened, and the first pilot flow path 66 and the first valve body 70 in the vicinity of the electromagnetic valve mechanism 72 can be warmed.

  The electric flow path opening / closing device 52 can open and close the diaphragm valve body 58 as described later by opening and closing the first pilot flow path 66 by the first valve body 70, so It has a function to switch water discharge to water stop. At least the electromagnetic valve mechanism 72 of the electric channel opening / closing device 52 is provided outside the lid-like member 33 so as to prevent the electronic components from being affected by the high humidity air in the cleaning water tank 20. Yes.

  The mechanical channel switching device 54 forms a mechanical so-called ball tap valve device that does not use electricity. The mechanical channel opening / closing device 54 is configured to be seated on a second valve seat 68a that is a valve seat provided on the second pilot channel 68 so that the second pilot channel 68 can be closed. A second valve body 74 that is a body, a float 76 (see FIGS. 4 and 7) that is a mechanical mechanism that moves up and down according to fluctuations in the level of the cleaning water in the cleaning water tank 20, and a mechanical mechanism, One is connected to the float 76, and the other is connected to the second valve body 74. The swing is a mechanical mechanism that swings when the float 76 moves up and down to mechanically open and close the second valve body 74. A moving member 78. The operation of the float 76 is transmitted to the second valve body 74 as a mechanical operation via the swing member 78. The mechanical flow path opening / closing device 54 opens and closes the second pilot flow path 68 when the second valve body 74 is seated on a second valve seat 68 a provided on the second pilot flow path 68.

  When the float 76 side portion of the swing member 78 moves upward, the swing member 78 closes by moving the second valve body 74 side downward and pressing the second valve body 74 against the second valve seat 68a. When the float 76 side portion of the swing member 78 moves downward, the second valve body 74 side portion moves upward so that the second valve body 74 is separated from the second valve seat 68a and opened. It has become. The electric channel opening / closing device 52 opens and closes the diaphragm valve body 58 as will be described later by opening and closing the second pilot channel 68 by the second valve body 74 connected to the float 76 and the swing member 78. And has a function of switching between discharging water and stopping water into the cleaning water tank 20.

  The primary side water passage 60, the secondary side water passage 64, the pressure chamber 62, the diaphragm valve body 58, which is a basic structure other than the electric water passage opening and closing device 52, for example, most of the water supply device 32. A main valve seat 56 and a mechanical channel opening / closing device 54 are provided inside the cleaning water tank 20. Therefore, the distance between the water supply channel 50 extending into the cleaning water tank 20 and the mechanical channel switching device 54 can be made relatively short. Thereby, the water supply apparatus 32 can be formed in a comparatively small size, and it is necessary to provide the cleaning water tank 20 with a notch for arranging the flow path of the water supply apparatus 32 so as to straddle the wall surface of the cleaning water tank 20 as in the past. Thus, as in the present embodiment, the washing water tank 20 that accommodates most of the water supply device 32 can be formed in a relatively small size.

  The second pilot channel 68 extends upward from the pressure chamber 62. The second pilot channel 68 is formed by a combination of a lateral channel extending in the lateral direction and an upward channel extending in the upward direction, or only the upward channel. The upward flow path includes a flow path extending obliquely upward as well as vertically upward. The second pilot flow path 68 is formed by a flow path that does not include a downward flow path that extends downward and has a shape in which water hardly remains when draining. The second pilot flow path 68 forms an upward outlet 68b at the downstream end thereof.

  The first pilot flow channel 66 is connected to the lower portion of the pressure chamber 62 and forms an outflow path through which the wash water in the pressure chamber 62 flows downward. The first pilot channel 66 is formed by a combination of a lateral channel extending in the lateral direction and a downward channel extending in the downward direction, or only a downward channel. The downward flow path includes a flow path extending obliquely downward as well as vertically downward. The first pilot channel 66 is formed by a channel that does not include an upward channel extending upward, and has a shape in which water hardly remains when draining. The first pilot channel 66 has a downwardly flowing outlet 66b at the downstream end thereof. The outlet 66 b of the first pilot channel 66 is an opening whose periphery is opened to a space in the wash water tank 20.

Next, with reference to FIGS. 6 and 8, a water supply operation of the cleaning water tank apparatus according to the embodiment of the present invention will be described.
As shown in FIG. 8, before the water supply device 32 supplies water into the washing water tank 20, the diaphragm valve body 58 is seated on the main valve seat 56, and the inside of the primary side water passage 60 and the pressure chamber 62 are external. Filled with water supply from the water supply or the like, the internal pressure in the pressure chamber 62 becomes the primary water pressure, and the diaphragm valve body 58 stops the water between the primary side water passage 60 and the secondary side water passage 64. Yes. Further, the first valve body 70 of the electric channel opening / closing device 52 is seated on the first valve seat 66a of the first pilot channel 66, and the first pilot channel 66 is closed. The second valve body 74 of the mechanical flow path opening / closing device 54 is seated on a second valve seat 68a provided on the second pilot flow path 68, and the second pilot flow path 68 is closed. . Thus, in the water supply apparatus 32, both the 1st pilot flow path 66 and the 2nd pilot flow path 68 are made into the closed state, and the diaphragm valve body 58 is made into the closed state.

  As shown in FIG. 6, the wash water tank 20 is filled with wash water up to the full water level WL1. In this state, after the user uses the toilet bowl, for example, when a large washing operation button (operation unit) is pressed, a signal from the operation button is transmitted to the control unit 21 and the rotation device 38 is driven. Then, the rotating shaft 42 rotates, the ball chain 44 attached to the tip of the rotating shaft 42 is pulled upward, the overflow pipe 34 and the drain valve 36 are integrally raised, the drain port 22 is opened, and the cleaning is performed. Wash water in the water tank 20 is supplied from the drain port 22 to the water conduit 6 of the toilet body 2.

  When the wash water is supplied to the toilet body 2, the water level in the wash water tank 20 is lowered below the float switch 28, whereby the float switch 28 is changed from ON to OFF. Further, when the water level in the washing water tank 20 starts to drop below the bottom surface of the float 76, the float 76 of the mechanical flow path opening / closing device 54 automatically follows and starts to descend, and the swinging member moves like this. The second valve body 74 is raised by the swinging motion of 78, and the second valve body 74 is separated from the second valve seat 68a. Since the state in which the second valve body 74 is separated from the second valve seat 68a is shown in FIG. 9, the illustration is omitted in FIG. When the second valve body 74 is separated from the second valve seat 68a, the cleaning water in the pressure chamber 62 passes through the second pilot flow path 68 toward the internal space in the cleaning water tank 20 as indicated by an arrow F1. The outflow starts and the water pressure of the washing water in the pressure chamber 62 decreases. Therefore, the diaphragm valve body 58 is separated from the main valve seat 56 by the water pressure from the primary side water passage 60, and the primary state in the state where the diaphragm valve body 58 is separated from the main valve seat 56 as indicated by an imaginary line arrow F2. Wash water from the side water passage 60 directly flows into the secondary side water passage 64. In FIG. 8, the state in which the diaphragm valve body 58 is separated from the main valve seat 56, that is, the open state of the diaphragm valve body 58 is indicated by a virtual line A1.

In addition, after a predetermined time has elapsed after the float switch 28 changes from ON to OFF, the control unit 21 operates the electromagnetic valve mechanism 72 of the electric flow path opening / closing device 52 to open the first valve body 70. Move to. When the first valve body 70 is separated from the first valve seat 66a, the first pilot channel 66 is opened. Since the state in which the first valve body 70 is separated from the first valve seat 66a is shown in FIG. 9, the illustration is omitted in FIG. As shown by the arrow F3, the wash water in the pressure chamber 62 flows out into the wash water tank 20 through the first pilot flow channel 66 in a state where the first valve body 70 is separated from the first valve seat 66a. The water pressure in the chamber 62 decreases. Therefore, the diaphragm valve body 58 is separated from the main valve seat 56 by the water pressure from the primary side water passage 60, and the washing water from the primary side water passage 60 flows into the secondary side water passage 64 as indicated by an imaginary line arrow F <b> 2. Flows directly into.
That is, in the normal water supply operation, the electric channel opening / closing device 52 and the mechanical channel opening / closing device 54 operate independently and in parallel, and operate the common diaphragm valve body 58. Accordingly, both the first pilot channel 66 and the second pilot channel 68 are opened, and the washing water flows out from both at the same time. By these operations, the communication between the primary side water passage 60 and the secondary side water passage 64 is opened, and the wash water is supplied into the wash water tank 20 from the secondary side water passage 64 through the water supply port 46. .
Even when one of the electric channel opening / closing device 52 and the mechanical channel opening / closing device 54 does not operate due to a power failure or a failure, at least one of them is the primary side water passage 60 and the secondary side. Since communication with the water passage 64 is opened, water supply from the water supply port 46 in the wash water tank 20 is stably performed.

Next, the rotation device 38 is operated by the operation of the user or the determination of the control unit 21, the rotation shaft 42 rotates, and the ball chain 44 attached to the tip of the rotation shaft 42 is pulled down. The overflow pipe 34 and the drain valve 36 are integrally lowered, the drain port 22 is closed, and the water supplied to the wash water tank 20 is stored in the wash water tank 20.
When the water level in the washing water tank 20 reaches the height of the float 76 of the mechanical flow path opening / closing device 54, the float 76 starts to rise, and the swinging motion of the swinging member 78 that moves like this causes the first movement. The two-valve body 74 is lowered and the second valve body 74 is seated on the second valve seat 68a. In this case, even when the second valve body 74 is in a state of closing the second pilot flow path 68, the first valve body 70 of the electric flow path opening / closing device 52 is separated from the first valve seat 66a, and the first The pilot channel 66 is opened, and the water pressure of the washing water in the pressure chamber 62 remains lowered. Therefore, the diaphragm valve body 58 is separated from the main valve seat 56 by the water pressure from the primary side water passage 60, and the wash water from the primary side water passage 60 flows directly into the secondary side water passage 64.
When the water level in the wash water tank 20 further rises and reaches the full water level WL1, the float switch 28 is turned on, the control unit 21 detects this, and the control unit 21 detects the electromagnetic valve of the electric flow path opening / closing device 52. The mechanism 72 is actuated to move the first valve body 70 in a direction for closing. When the first valve body 70 closes the first valve seat 66a, the first pilot flow path 66 and the second pilot flow path 68 communicating with the pressure chamber 62 are both closed, and the washing water in the pressure chamber 62 is closed. The water pressure rises in response to the water pressure in the primary water passage 60. Accordingly, the diaphragm valve body 58 is pressed against the main valve seat 56 by the water pressure from the primary side water passage 60, and the diaphragm valve body 58 is closed. As a result, the cleaning water does not flow from the primary side water passage 60 into the secondary side water passage 64, the water supply to the water supply port 46 in the cleaning water tank 20 is stopped, and the cleaning water fills the cleaning water tank 20. A series of cleaning operations are completed.

First, with reference to FIG. 9, the operation | movement at the time of draining of the water supply apparatus 32 of the washing water tank apparatus 18 by one Embodiment of this invention is demonstrated.
FIG. 9 is a diagram illustrating a state in which both the first pilot flow path and the second pilot flow path are in the open state and the diaphragm valve body is in the closed state in the water supply apparatus of FIG. 8.
When a cold environment in which the outside air temperature of the wash water tank device 18 is 0 ° C. or lower is expected, measures for the water draining method are taken in order to suppress a failure of the water supply device 32 due to water freezing. As a countermeasure for the draining method, draining is performed such that the drain valve 36 is opened by the rotation of the rotating device 38 and the cleaning water stored in the cleaning water tank 20 is discharged. Further, the water supply pipe 30 and the primary side water passage 60 are drained by a drain plug provided in the water supply pipe 30 or the like.

  As shown in FIG. 9, the primary side water passage 60 is in a state where drainage is executed and no washing water remains. Since there is no washing water in the primary side water passage 60, the diaphragm valve body 58 is seated on the main valve seat 56. Although the pressure chamber 62 and the primary side water passage 60 communicate with each other through the bleed hole of the diaphragm valve body 58, the bleed hole is a small-diameter opening, so that the cleaning water in the pressure chamber 62 is the primary side water passage 60. As a result, the water remains in the pressure chamber 62 as residual water. If this residual water freezes in the pressure chamber 62, the diaphragm valve body 58 may malfunction, or the water supply device may fail due to damage to the pressure chamber 62, the diaphragm valve body 58, or the like.

At the time of draining the primary side water passage 60 and the washing water tank 20, the washing water in the washing water tank 20 is discharged, so that the float 76 of the mechanical flow path opening / closing device 54 is lowered and the second valve body 74 is moved. Ascending, the second valve element 74 is separated from the second valve seat 68a. Therefore, the second pilot flow path 68 is opened.
Further, since the washing water in the washing water tank 20 is discharged at the time of draining, the float switch 28 is turned off, the electromagnetic valve mechanism 72 of the electric channel opening / closing device 52 is operated, and the first valve body 70 is moved. Separated from the first valve seat 66a. Therefore, the first pilot flow channel 66 is opened.

  Since the second pilot flow path 68 extends upward from the pressure chamber 62, the washing water in the second pilot flow path 68 can flow down to the pressure chamber 62 as indicated by the arrow F4. The first pilot flow path 66 can flow out from the chamber 62 downward. Therefore, it is possible to prevent the cleaning water from generating residual water in the second pilot channel 68 when draining water. Further, since the wash water flows down from the second pilot flow path 68 to the pressure chamber 62, the discharge of the wash water from the first pilot flow path 66 can be promoted.

  Since the first pilot flow channel 66 forms an outflow passage through which the wash water flows downward, the wash water in the pressure chamber 62 flows downward from the lower portion of the pressure chamber 62 as indicated by an arrow F5. Can do. Since the first pilot channel 66 is formed only by the lateral channel and the downward channel, the first pilot channel 66 can flow downward relatively smoothly while suppressing the retention of the washing water. If at least the first pilot flow channel 66 is open, the wash water in the pressure chamber 62 can flow downward. As described above, it is possible to prevent the cleaning water from generating residual water in the pressure chamber 62 and the first pilot flow channel 66 in which the cleaning water is difficult to escape to the primary water passage 60 side when draining water. When it is determined that the drainage of the second pilot flow path 68, the pressure chamber 62, and the first pilot flow path 66 has been completed, the operation of the electric flow path opening / closing device 52 of the electric flow path opening / closing device 52 is determined by the operation of the user or the determination of the control unit 21. The one-valve body 70 is closed, and the operation at the time of draining the water supply device 32 is ended.

  As a modification, the water supply device 32 may be configured such that the first flow path is opened and closed by the second on-off valve device, and the second flow path is opened and closed by the first on-off valve device. Specifically, in the water supply device 32, the first pilot channel 66 is configured to be opened and closed by the mechanical channel switching device 54, and the second pilot channel 68 is opened and closed by the electric channel switching device 52. You may comprise. Even in such a configuration, when draining the primary side water passage 60, the mechanical channel opening / closing device 54 opens the first pilot channel 66, so that the inside of the pressure chamber 62 The washing water can be discharged downward by the first pilot channel 66.

  As a further modification, in the water supply device 32, the first on-off valve device that opens and closes the first flow path is changed to a valve device that opens or closes manually or automatically, and the first flow path is changed to a drain flow path that is used when draining water. It may be changed. Specifically, the electric channel opening / closing device 52 may be changed to a valve device that opens or closes the channel manually or automatically, and the first pilot channel 66 may be configured as a drain channel used for draining water. . For example, the valve device is a manual valve for draining that is manually operated by a user when draining water. The first pilot channel 66 is used as a drain channel when draining water. The diaphragm valve body 58 is opened and closed by opening and closing the second pilot channel 68 by the mechanical channel switching device 54. Even in such a configuration, when draining the primary side water passage 60, the valve device opens the first pilot flow channel 66, so that the cleaning water in the pressure chamber 62 is supplied to the first water passage 60. The pilot channel 66 can flow downward.

Next, the effect of the washing water tank apparatus according to the embodiment of the present invention described above will be described.
According to the washing water tank device 18 according to the above-described embodiment of the present invention, when the primary side water passage 60 and the washing water tank 20 are drained, the electric channel opening / closing device 52 is provided with the first pilot channel 66. With the open state, the wash water in the pressure chamber 62 can flow downward through the first pilot flow channel 66. Therefore, it is possible to suppress the occurrence of residual water in the pressure chamber 62 where it is difficult for the wash water to escape to the primary water passage 60 side when draining water, and the residual water freezes in the pressure chamber 62, thereby causing the water supply device 32 to malfunction. This can be suppressed.
Further, since the second pilot flow path 68 extends upward from the pressure chamber 62, the wash water in the second pilot flow path 68 can flow down to the pressure chamber 62 when draining water. The first pilot channel 66 can flow downward from the inside. Therefore, it is possible to suppress the generation of residual water in the second pilot flow path 68 at the time of draining water, and it is possible to suppress the water supply device 32 from being damaged due to the residual water being frozen in the second pilot flow path 68. Can do.

  Furthermore, according to the cleaning water tank apparatus 18 according to the embodiment, the second pilot flow path 68 that is not easily frozen due to the remaining water extending upward from the pressure chamber 62 is provided with the float 76 of the mechanical flow path opening / closing device 54. It is opened and closed by a valve body that is mechanically transmitted. For this reason, even if residual water is generated in the first pilot flow channel 66 after draining, and this residual water is frozen in the first pilot flow channel 66, the primary side is recovered by returning from the drained state. When supplying wash water to the water passage 60, the second pilot flow path 68 is not frozen, so that water can be supplied from the primary water passage 60 to the wash water tank 20 through the second water supply flow path. When the water level in the washing water tank 20 rises and the float 76 rises, the second valve body 74 is seated on the second valve seat 68a provided on the second pilot flow path 68, so that the second pilot The flow path 68 can be closed and the diaphragm valve body 58 can be closed. Therefore, water supply can be realized up to the full water level WL1 where the float 76 rises in the washing water tank 20 while saving the user from performing a special operation when returning from draining.

  Further, according to the cleaning water tank apparatus 18 according to the embodiment, the cleaning water flowing down from the pressure chamber 62 and the second pilot flow path 68 passes by causing the electrically operated electromagnetic valve mechanism 72 to function as a heater. Freezing of the first pilot channel 66 can be suppressed. Accordingly, it is possible to prevent the water supply device 32 from being damaged due to generation of residual water in the first pilot flow channel 66 during drainage and freezing of the residual water in the first pilot flow channel 66. In addition, even if residual water is generated in the first pilot flow channel 66 and this residual water is frozen in the first pilot flow channel 66, the electromagnetic valve mechanism 72 functions as a heater, The ice in the first pilot channel 66 can be easily melted.

  In addition, according to the cleaning water tank device 18 according to the embodiment, the first pilot flow path 66 has the downward outlet 66b formed at the downstream end thereof, so that water flows out of the first pilot flow path 66. It is possible to make the residual water less likely to be generated in the first pilot flow channel 66. Therefore, it is possible to further suppress the generation of residual water in the first pilot flow channel 66 when draining water, and to further prevent the water supply device 32 from being damaged by freezing of the residual water in the first pilot flow channel 66. can do.

  Further, according to the cleaning water tank apparatus 18 according to the embodiment, the second pilot flow path 68 has an upward outlet 68b formed at the downstream end thereof, so that water is pressured from the second pilot flow path 68. It can be made easy to flow out to the chamber 62 side, and it is possible to make it difficult to generate residual water in the second pilot flow path 68. Therefore, it is possible to further suppress the generation of residual water in the second pilot flow path 68 at the time of draining water, and to further prevent the water supply device 32 from malfunctioning due to the residual water freezing in the second pilot flow path 68. can do.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 6 Water conduit 8 Drain trap pipe 8a Inlet 8b Ascending path 8c Descent path 10 Rim 12 First spout 14 Reservoir 16 Second spout 18 Washing water tank device 19 Exterior cover 20 Washing water tank 21 Control unit 22 Drain port 24 First opening 25 Second opening 26 Drain valve device 28 Float switch 30 Water supply pipe 32 Water supply device 33 Cover member 34 Overflow pipe 35 Substrate 36 Drain valve 37 Drain valve seat 38 Rotating device 40 Guide member 42 Rotating shaft 44 Ball chain 46 Water supply port portion 48 Connection portion 50 Water supply flow passage 52 Electric flow passage opening / closing device 54 Mechanical flow passage opening / closing device 56 Main valve seat 58 Diaphragm valve body 60 Primary side passage Water passage 62 Pressure chamber 64 Secondary side water passage 66 First pilot flow path 66a First valve seat 66b Outlet 68 Second pilot flow path 68a Second valve seat 68b Outlet 70 first valve 72 solenoid valve mechanism 73 mounting portion 74 the second valve body 76 the float 78 rocking member 80 first lid-like member 82 second lid-like member A1 phantom lines W ₀ stored surface WL1 full water level

Claims (5)

A washing water tank device for storing washing water for washing a toilet,
A cleaning water tank for storing cleaning water;
The water supply device for supplying cleaning water into the cleaning water tank;
The water supply device is
A first water supply channel for supplying cleaning water from a water supply source outside the cleaning water tank;
A second water supply channel for supplying cleaning water to a water supply port inside the cleaning water tank;
A main valve seat provided between the first water supply channel and the second water channel;
A diaphragm valve body that switches between a water stop state in which the second water supply passage is closed by sitting on the main valve seat and a water supply state in which the second water supply passage is opened apart from the main valve seat;
A pressure chamber for moving the diaphragm valve body toward the main valve seat when the internal pressure increases, and for moving the diaphragm valve body away from the main valve seat when the internal pressure decreases;
A first flow path extending from the pressure chamber so as to release the internal pressure of the pressure chamber;
A second flow path extending from the pressure chamber so as to release the internal pressure of the pressure chamber;
A first on-off valve device for opening and closing the first flow path;
A second on-off valve device for opening and closing the second flow path,
The second flow path extends upward from the pressure chamber, and
The cleaning water tank apparatus, wherein the first flow path is connected to a lower portion of the pressure chamber and forms an outflow passage for allowing the cleaning water in the pressure chamber to flow downward. The second on-off valve device includes a float that moves up and down in response to a change in the level of the wash water in the wash water tank, and a valve body that mechanically transmits the operation of the float.
The washing water tank apparatus according to claim 1, wherein the valve body is seated on a valve seat provided on the second flow path to open and close the second flow path. The first on-off valve device includes an electromagnetic valve mechanism that is electrically operated, and a first valve body that is operated by the electromagnetic valve mechanism,
The flush water tank apparatus according to claim 1, wherein the first flow path is opened and closed by the first valve body seated on a first valve seat provided on the first flow path.   The washing water tank apparatus according to any one of claims 1 to 3, wherein the first flow path forms a downward outlet at a downstream end thereof.   The washing water tank apparatus according to any one of claims 1 to 4, wherein the second flow path forms an upward outlet at a downstream end thereof.

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