JP2021127572A - Water closet device - Google Patents

Abstract

To provide a water closet device capable of reliably operating a float switch and excellent in maintainability while preventing the malfunction of a float.SOLUTION: In the water closet device, a float rising speed control tank 50 is constructed so that, when the water level of washing water in a washing water tank rises with the supply of the washing water into the washing water tank by a water supply device until the water level of the washing water reaches a height equivalent to a drain hole 52A, the washing water in the washing water tank flows from the drain hole 52A into the float rising speed control tank 50 while the rising speed of the water level of the washing water in the float rising speed control tank with the washing water flowing in from the drain hole 52A is lower than the rising speed of the water level of the washing water in the washing water tank, and when the water level of the washing water reaches a window part 60, the washing water in the washing water tank flows from the window part into the float rising speed control tank 50.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flush toilet bowl device.

Conventionally, as shown in Patent Document 1, a float switch is arranged in a water storage tank for supplying wash water to a flush toilet, and the float switch raises the water level of the wash water in the water storage tank to a full water level during water supply. A configuration is known in which the arrival is detected and the supply of wash water is stopped. The float switch used in such a flush toilet includes a support shaft extending in the vertical direction and a float that moves up and down according to the water level of the wash water along the support shaft.

However, the float switch as described above has a problem that the float does not operate due to the static frictional force acting between the float and the support shaft when stationary and the influence of air bubbles adhering to the float or the support shaft. Therefore, for example, Patent Document 1 discloses a configuration in which a float ascending speed control tank having a window portion is installed so as to surround at least the lower portion of the float switch. According to such a configuration, when the wash water in the water storage tank is discharged and then the wash water is supplied to the water storage tank, the float rise speed control tank is used until the water level in the water storage tank reaches the window. There is no wash water in the water storage tank, and when the water level in the water storage tank reaches the window, the wash water flows into the float rise speed control tank at once. As a result, a large buoyancy acts on the float, so that the float switch can be operated reliably.

JP-A-2017-133345

Here, in the invention described in Patent Document 1, a drain hole is formed on the bottom surface for drainage from the float ascending speed control tank, and when the washing water is supplied to the water storage tank, the drain hole is formed. The drain hole was closed by a float (check valve). However, in the configuration in which the check valve is provided in this way, the check valve sticks to the bottom surface of the float rise speed control tank due to water stains or slime, and water cannot be drained, so that the float switch operates normally. There was a problem that it would not work. Further, if the check valve is stuck, the check valve needs to be replaced, which requires a lot of time and effort for maintenance.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a flush toilet bowl device which can prevent malfunction of the float, can operate the float switch reliably, and has excellent maintainability. It is supposed to be.

The water-washing stool device of the present invention is a water-washing stool device that is washed with washing water and discharges filth. It has a water supply device that supplies wash water and a float switch provided in the wash water tank that moves up and down in conjunction with the water level of the wash water in the wash water tank, and is located at the height of the float. A float switch that transmits a signal in response, a control device that controls the water supply device to stop the supply of wash water in response to a signal received from the float switch, and wash water so as to surround at least the outside of the lower part of the float. It has a float rise speed control tank provided inside the tank, and the float rise speed control tank has a drain hole forming a hole for draining water, and at least above the portion surrounding the outside of the lower part of the float. In the float rise speed control tank, the water level of the wash water rises in the wash water tank due to the water supply of the wash water into the wash water tank by the water supply device, and the float rise speed control tank is washed. When the water level reaches a height corresponding to the drain hole, the wash water in the wash water tank flows into the float rise speed control tank from the drain hole, and the float rise speed due to the wash water flowing in from the drain hole. The rate of rise of the wash water level in the control tank is slower than the rate of rise of the wash water level in the wash water tank, and when the wash water level reaches the window, the wash water in the wash water tank rises in the window. It is characterized in that it is configured to flow into the float ascending speed control tank.
According to the present invention having the above configuration, when the water level of the washing water reaches the window portion, the washing water in the washing water tank flows into the float ascending speed control tank from the window portion. As a result, a large buoyancy acts on the float at a stretch, and even if a static friction force or the like is applied, the float rises and the float switch can be operated reliably. Further, in the present invention, since the valve member for closing the drain hole of the float rise speed control tank is not provided, the valve member does not stick due to water stain or the like. Further, even if the drain hole is closed by scale, it can be repaired by piercing the drain hole with a pin or the like. As described above, according to the present invention, maintainability can be improved.

In the present invention, preferably, the bottom surface of the float ascending speed control tank is formed as an inclined surface that inclines downward toward the drain hole.
When the wash water in the float rise rate control tank is discharged from the drain hole, the wash water may remain on the bottom surface due to surface tension. On the other hand, according to the present invention having the above configuration, since the bottom surface is formed as an inclined surface inclined downward, the washing water in the float ascending speed control tank can be reliably discharged. As a result, the water level rise in the float rise speed control tank when the wash water flows in from the window portion can be made larger.

In the present invention, preferably, a protrusion protruding downward is formed on the lower surface of the bottom of the float ascending speed control tank so as to surround the drain hole.
According to the present invention having the above configuration, since the protruding portion becomes a resistance, the inflow amount of the washing water into the float rising speed control tank through the drain hole becomes smaller, and the water level in the float rising speed control tank rises. , It becomes slower with respect to the rise in the water level in the wash water tank, and it is possible to suppress the decrease in the rise in the water level in the float rise rate control tank when the wash water flows in from the window.

In the present invention, preferably, the edge of the drain hole on the bottom surface of the float rising speed control tank has a curved shape.
According to the present invention having the above configuration, when the washing water is discharged, the washing water smoothly flows into the drain hole, and the washing water in the float rising speed control tank can be more reliably discharged into the washing water tank. As a result, the water level rise in the float rise speed control tank when the wash water flows in from the window portion can be made larger.

In the present invention, preferably, the windows are formed at at least two or more sides of the float rising speed control tank.
According to the present invention having the above configuration, as compared with the case where the window portion is provided only on one side surface of the float rising speed control tank, the washing water flows into the float rising speed control tank at once and the inside of the washing water tank. Even if foreign matter is mixed in and adheres to one of the windows, the inflow of cleaning water through the windows is not hindered.

In the present invention, the ratio of the cross-sectional area of the drain hole to the bottom area of the float rise rate control tank is preferably 1/500 to 1/100.
When the ratio of the cross-sectional area of the drain hole to the bottom area of the wash water tank is smaller than 1/500, the float ascending speed control tank is used between the start of draining the wash water and the supply of the wash water again. If the washing water cannot be sufficiently discharged and the ratio of the cross-sectional area of the drain hole to the bottom area of the washing water tank is larger than 1/100, the washing water flows in from the window when the washing water is supplied. When this happens, the water level in the float rise speed control tank rises slowly, and a large force does not act on the float. On the other hand, according to the present invention having the above configuration, if the ratio of the cross-sectional area of the drain hole to the bottom area of the washing water tank is 1/500 to 1/100, the washing is performed again from the start of draining the washing water. Since the wash water in the float rise rate control tank can be discharged before the water is supplied, and the inflow of the wash water from the drain hole when the wash water is supplied can be suppressed, the window portion. It is possible to sufficiently increase the water level rise in the float rise speed control tank when the wash water flows in from the float.

According to the present invention, it is possible to prevent a malfunction of the float, to operate the float switch reliably, and to provide a flush toilet bowl device having excellent maintainability.

It is a front-rear direction vertical cross-sectional view along the cross section in the center in the width direction which shows the flush toilet device by one Embodiment of this invention. It is a top view of the flush toilet bowl device shown in FIG. It is an enlarged cross-sectional view in the lateral direction which shows the float switch and the float rise rate control tank of the flush toilet apparatus shown in FIG. It is a perspective view which shows the float switch and the float ascending speed control tank of the flush toilet apparatus shown in FIG. It is a front view which shows the float rise rate control tank of the flush toilet apparatus shown in FIG. It is a vertical cross-sectional view which shows the float rise rate control tank of the flush toilet apparatus shown in FIG. It is an enlarged cross-sectional view of the part A in FIG. 6 which shows the float ascending speed control tank of the flush toilet apparatus shown in FIG. It is a top view which shows the float rise rate control tank of the flush toilet apparatus shown in FIG. It is a schematic diagram (No. 1) which shows the water level in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl apparatus shown in FIG. It is a schematic diagram (No. 2) which shows the water level in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl apparatus shown in FIG. FIG. 3 is a schematic view (No. 3) showing the water levels in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl device shown in FIG. It is a schematic diagram (No. 4) which shows the water level in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl apparatus shown in FIG. FIG. 5 is a schematic view (No. 5) showing the water levels in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl device shown in FIG. FIG. 6 is a schematic view (No. 6) showing the water levels in the washing water tank and the float rise rate control tank when the large washing mode is executed by the washing toilet bowl device shown in FIG. It is a graph which shows typically the time-dependent change of the water level in the washing water tank and the float rise rate control tank at the time of water supply of the water washing toilet apparatus shown in FIG.

Hereinafter, the flush toilet device according to the embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a vertical cross-sectional view in the front-rear direction along a cross section at the center in the width direction showing a flush toilet device according to an embodiment of the present invention. Further, FIG. 2 is a top view of the faucet toilet bowl device shown in FIG. In addition, in FIG. 1 and FIG. 2, the casing, the toilet seat and the toilet lid are omitted.
As shown in FIGS. 1 and 2, the flush toilet device 1 of the present embodiment includes a pottery body 2 and a cleaning unit 10.

A toilet seat (not shown) is arranged on the upper surface of the toilet body 2, and a toilet lid (not shown) is attached above the toilet seat. The toilet bowl body 2 is formed with a bowl portion 4, a drain trap pipeline 6 communicating with the lower portion of the bowl portion 4, and a headrace 8 formed inside the toilet bowl body 2 on the rear side. To the toilet bowl body 2, wash water is supplied from the wash water tank device 30 of the wash unit 10 to the headrace 8 and discharged to the bowl portion 4. Then, when the washing water is discharged to the bowl portion 4, the sewage in the bowl portion 4 is drained to the sewer pipe through the drain trap pipeline 6.

The cleaning unit 10 is located on the rear side of the upper surface of the casing plate 12, the casing plate 12 arranged on the upper surface of the rear side of the toilet body 2, the local cleaning device 20 provided on the front side of the upper surface of the casing plate 12, and the casing plate 12. It is provided with a washing water tank device 30 for storing water to be supplied to the bowl portion 4. The casing plate 12 constitutes a casing together with a casing cover (not shown) installed on the casing plate 12, and the local cleaning device 20 and the cleaning water tank device 30 are housed in the casing.

The local cleaning device 20 is supplied with tap water from a water pipe, advances the nozzle unit 22 in response to an operation of an operation switch (not shown), and injects water from the nozzle unit 22 to the user's local area. And wash.

The wash water tank device 30 stores wash water inside, and supplies the stored wash water to the bowl portion 4.
The washing water tank device 30 includes a washing water tank 32, a water supply device 34 partially provided in the washing water tank 32 and connected to a water supply source, and a drain valve device 36 provided in the washing water tank 32. A float switch 38 provided at the upper part in the washing water tank 32, a control device 40 for electrically controlling the electronic parts of the washing water tank device 30 and the local washing device 20, and a float switch 38 inside the washing water tank 32. It has a float ascending speed control tank 50 provided so as to surround the lower portion.

The wash water tank 32 includes a wash water tank lid 42 that covers the opening above the wash water tank 32. At the bottom of the wash water tank 32, a drain port 32A that communicates with the headrace 8 of the toilet bowl body 2 is formed. The wash water in the wash water tank 32 is supplied to the headrace 8 of the toilet bowl main body 2 via the drain port 32A.

The water supply device 34 is connected to a water supply pipe extending from an external water supply source of the washing water tank 32, and has a water supply valve 34A and a water discharge port 34B extending inward from the water supply valve 34A through the side surface of the washing water tank 32. To be equipped. The water supply valve 34A stops the state of discharging the washing water supplied from the water supply pipe into the washing water tank 32 from the water discharge port 34B and the water discharging to the washing water tank 32 in response to the control signal from the control device 40. Switch between states. The water supply flow rate per unit time of the washing water by the water supply device 34 is, for example, in the range of 4 L / min to 10 L / min. At this time, the rising speed of the washing water level in the washing water tank 32 is set to a rising speed in the range of 1 mm / s to 4 mm / s, for example, a rising speed of 2 mm / s.

The drain valve device 36 includes an overflow pipe 36A extending in the vertical direction and a drain valve 36B fixed to the lower end of the overflow pipe 36A. The drain valve 36B is provided so as to close the drain port 32A. The overflow pipe 36A is composed of a tubular member penetrating the drain valve 36B, and when the washing water in the washing water tank 32 reaches the upper end of the overflow pipe 36A, the washing water passes through the inside of the overflow pipe 36A and reaches the drain port 32A. It is discharged.

Further, the drain valve device 36 has a drive device 36C and a ball chain 36D. The drive device 36C is a device capable of moving the ball chain 36D up and down, and the ball chain 36D is connected to the drive device 36C and the overflow pipe 36A. By driving the drive device 36C and moving the ball chain 36D up and down, the overflow pipe 36A and the drain valve 36B are raised to open the drain port 32A, and the wash water in the wash water tank 32 is taken into the headrace 8 of the toilet bowl body 2. It is possible to switch between a state in which the water is supplied to the water and a state in which the drain port 32A is closed by the drain valve 36B.

The float switch 38 transmits a signal to the control device 40 according to the water level in the washing water tank 32, which will be described in detail later.

The control device 40 includes a water supply valve 34A of the water supply device 34 of the washing water tank device 30, a float switch 38, a drive device 36C of the drain valve device 36, a local cleaning device 20, and an operation switch (not shown) that receives an operation input of the user. ) Etc. are connected by wire or wirelessly, respectively.

When the user operates an operation switch (not shown) or the like to select a predetermined cleaning mode for large cleaning or small cleaning, the operation switch transmits a drive signal according to the cleaning mode to the control device 40. Upon receiving the drive signal, the control device 40 drives the drive device 36C, and the drive device 36C pulls up the overflow pipe 36A and the drain valve 36B for a predetermined time via the ball chain 36D to open the drain port 32A. Then, when the predetermined time elapses, the drive device 36C lowers the overflow pipe 36A and the drain valve 36B again to close the drain port 32A. By opening the drain port 32A for a predetermined time in this way, a certain amount of the washing water in the washing water tank 32 is discharged to the headrace 8 of the toilet bowl main body 2.

Further, the control device 40 controls to open the water supply valve 34A of the water supply device 34 immediately after the drainage of the wash water from the wash water tank 32 is started, and supplies the wash water to the wash water tank 32. Start. It should be noted that the supply of the washing water to the washing water tank 32 does not necessarily have to be started immediately after the start of the drainage, and the structure is such that the washing water is started when a predetermined time has elapsed from the start of the drainage of the washing water, or the washing water. A lower float switch (not shown) separately provided in the tank may be configured to start from the time when a drop in the water level is detected.

Then, when the washing water is supplied from the water supply device 34 to the washing water tank 32 and the water level of the line purified water in the washing water tank 32 rises to a predetermined height, the float switch 38 transmits a stop signal to the control device 40. When the control device 40 receives the stop signal from the float switch 38, the control device 40 closes the water supply valve 34A of the water supply device 34 to stop the water supply of the washing water.

Next, the configuration of the float switch 38 and the float rising speed control tank 50 in the flush toilet device of the present embodiment will be described.
FIG. 3 is a lateral enlarged cross-sectional view of the float switch and float rising speed control tank of the faucet toilet device shown in FIG. 1, and FIG. 4 is a float switch and float of the faucet toilet device shown in FIG. It is a perspective view which shows the ascending speed control tank. Note that FIG. 3 shows a state in which the float rises and the float switch is ON.

The float switch 38 is attached to the upper part inside the washing water tank 32, and is arranged inside the float ascending speed control tank 50 so as to be surrounded below by the float ascending speed control tank 50. ..

As shown in FIGS. 3 and 4, the float switch 38 has a stem (shaft portion) 38A extending in the vertical direction and a stem 38A while receiving buoyancy according to the water level in response to fluctuations in the water level in the washing water tank 32. A float 38B that moves up and down along the stem 38A and a flange portion 38C attached to the upper part of the stem 38A are provided. An opening 32C is formed in the washing water tank lid 42, which is the top plate of the washing water tank 32, and a mounting member 33 is fixed to the lower surface of the opening 32C. A circular opening 33A is formed in the mounting member 33, and screw holes 33B are formed on both sides of the opening 33A in the lateral direction. Further, snap portions 33C extending downward are formed on both sides of the screw hole 33B. The snap portion 33C has a protruding portion protruding outward at the lower end, and is elastically deformable toward the center in the lateral direction.

The float switch 38 has an opening 33A inserted so that the stem 38A hangs down in the washing water tank 32, and the flange portion 38C is placed on a mounting member 33 mounted on the upper part of the washing water tank 32. Then, the flange portion 38C is fixed by tightening the screw 38D penetrating the flange portion 38C into the screw hole 33B of the mounting member 33. A float stopper 38E is attached to the lower end of the stem 38A. The float stopper 38E prevents the float from falling off, and the lowermost position of the float 38B can be defined.

A reed switch 38F is embedded in the stem 38A, and a magnet 38G is embedded in the float 38B. The reed switch 38F of the float switch 38 is electrically connected to the control device 40 via a connecting portion 38H extending from above the flange portion 38C. When the float 38B rises and the magnet 38G is located near the reed switch 38F, the reed switch 38F is turned on by the magnetic force of the magnet 38G, and a water supply stop signal is transmitted (transmitted) to the control device 40. Further, when the float 38B is lowered, the magnet 38G is separated from the reed switch 38F, the reed switch 38F is turned off, and the float 38B is in a standby state without transmitting a water supply stop signal.

The float 38B is formed in a cylindrical shape, is arranged so that the stem 38A passes through a through hole at the center, and can move up and down along the stem 38A according to the water level of the washing water tank 32. Although a gap is formed between the inner wall of the float 38B and the outer wall of the stem 38A, it may be in contact with the stem 38A depending on its own position and posture. Normally, the float 38B moves while being in contact with the stem 38A.

When the float 38B is to be moved relatively along the stem 38A, the float 38B is a force that tries to hinder the movement by a force such as a static friction force (or a dynamic friction force) with the stem 38A. Will receive. Therefore, when the float 38B is stationary in contact with the stem 38A, a static frictional force between the float 38B and the stem 38A and a force that tries to prevent movement such as adhesion of air bubbles act. If a force that overcomes these forces (for example, buoyancy, impact force due to water flow, sway due to water flow, force that causes wave force such as turbulence of water surface, etc.) does not act, the float 38B will not move and the water level will not move. It may not be possible to detect fluctuations.

Next, the details of the float ascending speed control tank 50 of the flush toilet device according to the present embodiment will be described. 5 to 8 show a float ascending speed control tank of the faucet toilet device shown in FIG. 1, FIG. 5 is a front view, FIG. 6 is a vertical cross-sectional view along the lateral direction, and FIG. 7 is A in FIG. An enlarged cross-sectional view of the portion, FIG. 8 is a top view.

As shown in FIGS. 5 to 8, the float ascending speed control tank 50 is formed in a substantially rectangular parallelepiped shape, and has a rectangular bottom plate 52, a side wall 54 extending upward from the four sides of the bottom plate 52, and a side wall 54 upward from the side wall 54. A connecting portion 56 extending to the above and a mounting portion 58 mounted above the connecting portion 56 are provided. The float rising speed control tank 50 may be formed not only in a rectangular parallelepiped shape but also in a cylindrical shape or another shape.

The bottom plate 52 is formed with a drain hole 52A at substantially the center (center in the depth direction and the center in the width direction) in horizontal view. The bottom surface of the bottom plate 52 is formed as an inclined surface that gently inclines downward toward the drain hole 52A. The drain hole 52A is a through hole having a circular cross section, and a protruding portion 52B protruding downward is formed around the drain hole 52A of the bottom plate 52. The protruding portion 52B has a substantially cylindrical shape and is provided so as to surround the drain hole 52A. Further, the edge portion of the drain hole 52A on the bottom surface of the bottom plate 52 is formed in a curved shape. The shape of the drain hole 52A is preferably a columnar shape with a vertical cross section. In the present embodiment, the ratio of the cross-sectional area of the drain hole 52A to the bottom area of the washing water tank 32 is 1/500 to 1/100. When the ratio of the cross-sectional area of the drain hole 52A to the bottom area of the wash water tank 32 is smaller than 1/500, the float ascending speed is controlled from the start of draining the wash water to the supply of the wash water again. The water level rise in the float rise speed control tank 50 when the wash water flows in from the window 60 when the wash water is supplied because the wash water cannot be sufficiently discharged from the tank 50, and a large force is applied to the float 38B. There is a possibility that the float switch will not operate normally because it will not work. When the ratio of the cross-sectional area of the drain hole 52A to the bottom area of the wash water tank 32 is larger than 1/100, the inflow of wash water from the drain hole 52A due to the rise in the water level of the wash water tank 32 when the wash water is supplied. Since the amount increases, the water level rise in the float rise speed control tank 50 when the washing water flows in from the window 60 becomes slow, and a large force does not act on the float 38B, so that the float switch does not operate normally. there is a possibility. On the other hand, if the ratio of the cross-sectional area of the drain hole 52A to the bottom area of the washing water tank 32 is 1/500 to 1/100, the washing water is supplied again from the start of draining the washing water. In the meantime, the wash water in the float rise rate control tank 50 can be discharged, and the inflow amount of the wash water from the drain hole 52A due to the rise in the water level of the wash water tank 32 at the time of supplying the wash water can be suppressed. It is possible to sufficiently increase the water level rise in the float rise speed control tank 50 when the wash water flows in from the window portion 60 at the time of supply.

The connecting portion 56 is formed so as to extend upward from both side portions of the front surface and the rear surface of the side wall 54. The upper end of the connecting portion 56 is connected to the mounting portion 58. As a result, a window portion 60 is formed between the side wall 54, the adjacent connecting portion 56, and the mounting portion 58. The window portion 60 is formed on the four side surfaces (front, rear, and left and right side surfaces) of the float ascending speed control tank 50 above the side wall 54 surrounding the float 38B. The lower edge of each window 60 extends horizontally and is located at the same height. The height of the lower edge of the window portion 60 is higher than the water level corresponding to the float 38B located at the lowermost position and lower than the water level corresponding to the float 38B located at the uppermost position. The water level corresponding to the float 38B located at the lowermost position is a position where the float 38B floats on the water surface when the water level exceeds this level, and the water level corresponding to the float 38B located at the uppermost position is higher than this. The water level is such that the float 38B does not rise even if the water level rises. The cross-sectional area of the horizontal cross section at a height below the lower end of the window 60 of the float rising speed control tank 50 is 30 of the cross-sectional area of the horizontal cross section at the same height position of the water storage area inside the wash water tank 32. It is in the range of 1 to 1/3. Further, the cross-sectional area of the horizontal cross section of the washing water tank 32 of the present embodiment, for example, the range of 30000mm ² ~50000mm ^2, which is preferably set in a range of 40000mm ² ~50000mm ^2. The window portions 60 do not necessarily have to be provided on all the side surfaces of the float rising speed control tank 50 (that is, at four locations on the side surfaces), and are preferably provided at at least two or more locations on the side surfaces. As a result, the inflow amount of the washing water from the window portion 60 at the time of supplying the washing water increases, so that the water level in the float rising speed control tank 50 rises sharply.

The mounting portion 58 includes a main body portion 58B formed in a tubular shape having a rectangular horizontal cross section corresponding to the side wall 54, and snap engaging portions 58A formed on both side portions of the main body portion 58B. The upper end of the connecting portion 56 is connected to the main body portion 58B, and the main body portion 58B is located directly above the side wall 54. The snap engaging portion 58A is composed of a tubular portion having a rectangular horizontal cross section, and is formed on both sides of the main body portion 58B in the lateral direction.

In the float ascending speed control tank 50, the snap portion 33C of the mounting member 33 inserts the snap engaging portion 58A, and the protrusion at the tip of the snap portion 33C abuts on the lower end surface of the side wall of the snap engaging portion 58A. It is held on the upper part of the washing water tank 32.

The float switch 38 is surrounded by a side wall 54 below the float switch 38. Further, in the float switch 38, the float switch 38 is turned ON from the height position of the float 38B when the water level in the washing water tank 32 and the float rising speed control tank 50 reaches the lower end of the window portion 60. The float 38B is arranged so that the height position is upward.
The float switch 38 may be provided at a height such that buoyancy acts on the float 38B when at least the washing water in the float rising speed control tank 50 reaches the lower end of the window portion 60.

Hereinafter, the cleaning operation of the flush toilet device of the present embodiment will be described.
In addition, the large cleaning mode executed by the flush toilet bowl device according to the present embodiment of the present invention will be described below. The water-washing urinal device according to the present embodiment can execute two types of washing mode, a large washing mode and a small washing mode. In the large washing mode, when the amount of pulling up of the drain valve 36B of the drain valve device 36 is the small washing mode. The only difference is that the drain port 32A of the wash water tank device 30 is open for a long time, and the dead water level is lower than in the small wash mode. Other than that, the large wash mode and the small wash mode are used. Since the basic operations of are common, only the large cleaning mode will be described.

9A to 9F are schematic views showing the water levels in the washing water tank and the float rising speed control tank when the large washing mode is executed by the washing toilet bowl device shown in FIG. In the figure, the shapes of the float switch 38 and the float rising speed control tank 50 are schematically shown. Further, FIG. 10 is a graph schematically showing changes over time in the water level in the wash water tank and the float rise rate control tank when the toilet bowl device shown in FIG. 1 is supplied with water. In FIG. 10, the time when the water level of the washing water in the washing water tank reaches the bottom surface of the float rising speed control tank is set to 0, the solid line shows the water level of the washing water tank, and the broken line shows the water level in the float rising speed control tank. Is shown.

As shown in FIGS. 1 and 9A, in the standby state before the start of drainage (before the start of cleaning) of the drain valve device 36, the drain valve 36B of the drain valve device 36 closes the drain port 32A of the wash water tank 32. The initial water level in the washing water tank 32 is the full water level W0. In this state, the float is in the raised state, the float switch 38 is in the ON state, and the water supply valve 34A of the water supply device 34 is in the closed state.

Next, the large cleaning mode is started by the user operating the operation unit (not shown) or by the determination of the predetermined control device 40. When the large washing mode is started, the drain valve device 36 first opens the drain port 32A of the washing water tank 32, and the drain valve device 36 of the washing water tank 32 drains the water washing toilet device 1 to the toilet body 2. Is started, and the water level in the washing water tank 32 begins to drop. At the same time, the control device 40 that receives the request command to start cleaning the toilet bowl opens the water supply valve 34A of the water supply device 34, and discharges water from the discharge port 34B of the cleaning water having a constant instantaneous flow rate into the cleaning water tank 32. To start.

Since the amount of wash water discharged from the drain port 32A to the toilet bowl main body 2 is larger than the amount of water supplied to the wash water tank 32 by the water supply device 34, the water level of the wash water in the wash water tank 32 drops. Until the water level in the wash water tank 32 reaches the lower end of the window 60 of the float rise speed control tank 50, the water level in the wash water tank 32 and the water level in the float rise speed control tank 50 are at the same speed. It will decrease. Then, when the water level of the washing water in the washing water tank 32 (float rising speed control tank 50) drops, the float 38B also drops and the float switch 38 is turned off.

When the water level of the washing water in the washing water tank 32 reaches the lower end of the window portion 60 of the float rising speed control tank 50, after that, the washing water in the float rising speed control tank 50 is washed only from the drain hole 52A. It is discharged into the tank 32. Therefore, the falling speed of the water level in the float rising speed control tank 50 becomes slow, and as shown in FIG. 9B, the water level of the washing water in the washing water tank 32 becomes low in advance. When the water level of the washing water in the float rise speed control tank 50 drops, the height of the float 38B gradually drops with the water level, the float switch 38 switches to the OFF state, and further descends to reach the lowest position. .. Further, when the water level in the float rising speed control tank 50 drops, the float rising speed control tank 50 becomes empty. At this time, even if the water level in the float rising speed control tank 50 drops, the washing water may remain on the bottom surface due to surface tension or the like. On the other hand, in the present embodiment, since the bottom surface of the float rising speed control tank 50 is inclined downward toward the drain hole 52A, the washing water in the float rising speed control tank 50 is smoothly drained. It is sent to 52A, and it is possible to prevent the washing water from remaining in the float ascending speed control tank 50. Further, in the present embodiment, since the circumference of the drain hole 52A on the upper surface of the bottom plate of the float ascending speed control tank 50 is curved, it is possible to more reliably prevent the washing water from remaining in the ascending speed control tank 50.

Next, in the control device 40, when a predetermined time elapses from the start of draining the washing water and the water level in the washing water tank 32 drops to the dead water level (not shown), the drain valve device 36 drains the washing water tank 32. Close the mouth 32A. In this state, all the washing water in the float rising speed control tank 50 is also discharged. Even when the water level in the washing water tank 32 reaches the dead water level, the float 38B is in the lowered state and the float switch 38 is in the OFF state. Therefore, the water supply valve 34A is opened and the water supply device 34 is used for washing. Water is continuously supplied to the water tank 32, and the water level in the washing water tank 32 rises from the dead water level (not shown). Since the water supplied to the washing water tank 32 by the water supply device 34 has a constant water supply flow rate (a constant instantaneous flow rate), the water level of the washing water in the washing water tank 32 rises at a substantially constant speed.

Then, when the water supply from the water supply device 34 is continued, the water level rises, and reaches the height of the bottom surface of the float rise speed control tank 50 (t0 in FIG. 10), the water drain hole 52A enters the float rise speed control tank 50. Washing water flows into. At this time, since the cross-sectional area of the drain hole 52A is very small (1/500 to 1/100 of the bottom area of the washing water tank 32), as shown in FIG. 10, the washing water of the float rising speed control tank 50 The water level rise is much slower than the water level rise of the wash water tank 32, and as shown in FIG. 9D, the water level in the wash water tank 32 is located above the water level of the wash water of the float rise speed control tank 50. .. Further, since a protruding portion 52B that protrudes downward is formed around the drain hole 52A on the bottom surface of the float rising speed control tank 50, the protruding portion 52B serves as a resistance and passes through the drain hole 52A. The inflow of the washing water into the float rising speed control tank 50 becomes smaller, and the water level rise in the float rising speed control tank 50 can be made slower than the water level rising in the washing water tank 32.

Then, when the water supply from the water supply device 34 is continued, the water level rises, and reaches the height position below the window portion 60 of the float rise speed control tank 50 (t1 in FIG. 10), as shown in FIG. 9E. , The washing water in the washing water tank 32 flows into the float rising speed control tank 50 from the window 60 of the float rising speed control tank 50.

As a result, the rise in water level in the float rise speed control tank 50 sharply increases. At this time, the rising speed of the washing water level inside the float rising speed control tank 50 is larger than the rising speed of the washing water level in the washing water tank 32. Preferably, the rising speed of the washing water in the float rising speed control tank 50 is in the range of 3 to 23 times, preferably 15 to 23 times the rising speed of the washing water in the washing water tank 32. It is said to be a range.

Since the rising speed of the washing water in the float rising speed control tank 50 is a relatively fast rising speed, the float 38B receives an increased buoyancy in accordance with the relatively fast rising speed of the water level. Therefore, even when the float 38B receives a static frictional force with the stem 38A or a force that tries to hinder the movement due to the adhesion of air bubbles or the like, the float 38B is increased so as to overcome this force. Since it receives buoyancy, it rises with respect to the stem 38A without causing a time lag.

Further, when the washing water in the washing water tank 32 falls from the window 60 into the float rising speed control tank 50, the washing water falling into the float rising speed control tank 50 makes the water surface ruffle. As a result, the float 38B swings up and down, back and forth, and left and right, and the float 38B receives a force that overcomes the force that tries to prevent the movement such as the static friction force between the float 38B and the stem 38A, and the float 38B receives the force. Can be smoothly started to move with respect to the stem 38A.

When the water level in the float rising speed control tank 50 reaches the lower end of the window portion 60 (t2 in FIG. 10), the water levels in the washing water tank 32 and the float rising speed control tank 50 rise at the same speed thereafter. .. Then, when the float 38B rises to a predetermined height W0, the float switch 38 is switched to the ON state. As a result, the float switch 38 transmits a water supply stop signal to the control device 40, whereby the control device 40 closes the water supply valve 44 and returns to the standby state shown in FIG. 9A.

If the drain hole 52A of the float rise speed control tank 50 is clogged due to water stains or the like, the screw 38D may be removed and the float switch 38 may be removed. As a result, the drain hole 52A of the float rise speed control tank 50 can be confirmed from above from the opening 32C of the wash water tank 32, and the clogging can be easily removed by piercing the drain hole 52A with a pin or the like. be able to.

According to this embodiment, the following effects are achieved.
According to the present embodiment having the above configuration, when the water level of the washing water reaches the window portion 60, the washing water in the washing water tank 32 flows from the window portion 60 into the float rising speed control tank 50. As a result, a large buoyancy acts on the float 38B at once, and even if a static frictional force or the like acts on the float 38B, the float 38B rises and the float switch 38 can be reliably operated. Further, in the present invention, since the valve member for closing the drain hole 52A of the float rising speed control tank 50 is not provided, the valve member does not stick due to water stain or the like. Further, even if the drain hole 52A is closed by water stain, it can be repaired by piercing the drain hole with a pin or the like. As described above, according to the present embodiment, maintainability can be improved.

Further, when the washing water in the float rising speed control tank 50 is discharged from the drain hole 52A, the washing water may remain on the bottom surface due to surface tension. On the other hand, according to the present embodiment, since the bottom surface is formed as an inclined surface that is inclined downward, the washing water in the float ascending speed control tank 50 can be reliably discharged. As a result, the water level rise in the float rise speed control tank 50 when the wash water flows in from the window portion 60 can be made larger.

Further, according to the present embodiment, a protruding portion 52B is formed on the lower surface of the bottom plate of the float rising speed control tank 50 so as to surround the drain hole 52A. As a result, the protruding portion 52B becomes a resistance, so that the inflow amount of the washing water into the float rising speed control tank 50 through the drain hole 52A becomes smaller, and the water level rise in the float rising speed control tank 50 is washed. It becomes slower than the rise in the water level in the water tank 32, and it is possible to suppress the rise in the water level in the float rise rate control tank 50 when the washing water flows in from the window portion 60.

Further, in the present embodiment, since the edge of the drain hole 52A on the bottom surface of the float rise speed control tank 50 has a curved shape, the wash water smoothly flows into the drain hole 52A when the wash water is discharged, and more reliably. The wash water in the float rise rate control tank 50 can be discharged into the wash water tank 32. As a result, the water level rise in the float rise speed control tank 50 when the wash water flows in from the window portion 60 can be made larger.

Further, in the present embodiment, the window portions 60 are formed at four locations on the side surface of the float rising speed control tank 50. According to the present embodiment as described above, as compared with the case where the window portion 60 is provided only on one side surface of the float rising speed control tank 50, the washing water flows into the float rising speed control tank 50 at once and at the same time, the washing water flows into the float rising speed control tank 50 at once. Even if foreign matter is mixed in the cleaning water tank 32 and adheres to one of the window portions 60, the inflow of the cleaning water through the window portion 60 is not hindered.

Further, in the present embodiment, the ratio of the cross-sectional area of the drain hole 52A to the bottom area of the float rising speed control tank 50 is 1/500 to 1/100. As a result, the washing water in the float rising speed control tank 50 can be discharged from the start of draining the washing water to the time when the washing water is supplied again, and the washing water can be discharged from the drain hole 52A when the washing water is supplied. Since the inflow of the washing water can be suppressed, the rise in the water level in the float rising speed control tank 50 when the washing water flows in from the window portion 60 can be sufficiently increased.

1 Water-washing toilet device 2 Toilet bowl body 4 Bowl part 6 Drain trap pipeline 8 Headrace 10 Cleaning unit 12 Casing plate 20 Local cleaning device 22 Nozzle part 30 Washing water tank device 32 Washing water tank 32A Drain port 32B Top plate 32C Opening 33 Mounting member 33A Opening 33B Thread hole 33C Snap 34A Water supply device 34A Water supply valve 34B Water spout 36 Drain valve device 36A Overflow pipe 36B Drain valve 36C Drive device 36D Ball chain 38 Float switch 38A Stem 38B Float 38C Flange 38D Screw 38E Float stop 38F Reed switch 38G Magnet 38H Connection part 40 Control device 42 Washing water tank lid 44 Water supply valve 50 Float rising speed control tank 52 Bottom plate 52A Drainage hole 52B Protruding part 54 Side wall 56 Connecting part 58 Mounting part 58A Snap engaging part 58B Body 60 Window

Claims (6)

A flush toilet device that cleans with wash water and discharges filth.
Toilet bowl body and
A wash water tank that stores wash water for washing the toilet bowl body, and
A water supply device that supplies wash water into the wash water tank,
A float switch provided in the washing water tank, which has a float that moves up and down in conjunction with the water level of the washing water in the washing water tank, and transmits a signal according to the height position of the float. Switch and
A control device that controls to stop the supply of wash water by the water supply device in response to a signal received from the float switch.
It has a float ascending speed control tank provided inside the washing water tank so as to surround at least the outside of the lower portion of the float.
The float ascending speed control tank is formed with a drain hole for forming a drain hole and a window portion provided above at least a portion surrounding the outside of the lower portion of the float.
The float rising speed control tank is
The water level of the washing water in the washing water tank rises due to the water supply of the washing water into the washing water tank by the water supply device.
When the water level of the wash water reaches a height corresponding to the drain hole, the wash water in the wash water tank flows into the float ascending speed control tank from the drain hole, and the wash flows from the drain hole. The rate of increase of the water level of the wash water in the float rise rate control tank by water is slower than the rate of increase of the water level of the wash water in the wash water tank.
When the water level of the washing water reaches the window portion, the washing water in the washing water tank flows into the float rising speed control tank from the window portion.
A flush toilet bowl device, characterized in that it is configured so as to. The bottom surface of the float rising speed control tank is formed as an inclined surface that inclines downward toward the drain hole.
The flush toilet device according to claim 1. On the lower surface of the bottom of the float rising speed control tank, a protruding portion that projects downward so as to surround the drain hole is formed.
The flush toilet device according to claim 1 or 2. The edge of the drain hole on the bottom surface of the float rising speed control tank has a curved shape.
The flush toilet device according to any one of claims 1 to 3. The windows are formed at least two or more on the side surfaces of the float rising speed control tank.
The flush toilet device according to any one of claims 1 to 4. The ratio of the cross-sectional area of the drain hole to the bottom area of the float rising speed control tank is 1/500 to 1/100.
The flush toilet device according to any one of claims 1 to 5.

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