JP2020094485A - First unit of washing water supply device and water closet - Google Patents

Abstract

To provide a washing water supply unit and a water closet that can improve the versatility of the system.SOLUTION: A washing water supply unit according to an embodiment is provided with an inlet section, a water supply valve section, a vacuum breaker section, and an outlet section. Washing water is introduced into the inlet section. The water supply valve section is provided downstream of the inlet section and includes a water supply valve that opens and closes the flow path. The vacuum breaker section is provided downstream of the water supply valve section and includes a vacuum breaker. The outlet section is provided downstream of the vacuum breaker section from which the washing water is derived. The washing water supply unit according to an embodiment is divisible into a first unit including the inlet section and the water supply valve section, and a second unit including the vacuum breaker section and the outlet section.SELECTED DRAWING: Figure 4A

Description

The disclosed embodiments relate to a flush water supply device and a flush toilet.

Conventionally, to a bowl portion having a rim spout and a jet spout, cleaning water is directly supplied to the rim spout from the tap water, and the cleaning water stored in the tank is pressurized and supplied to the jet spout. There is known a cleaning water supply device (see Patent Document 1).

The wash water supply device includes, for example, a water supply valve unit that switches between discharging and stopping the wash water to the bowl unit, a switching valve unit that switches the outflow destination of the wash water, and a vacuum breaker that prevents backwash of the wash water. Conventionally, these have been integrally formed by a mold or the like.

WO2005/098152

However, since the conventional cleaning water supply device is formed by integral molding as described above, the entire device must be newly manufactured even if, for example, a part of the configuration is changed, and thus the versatility is improved. It was lacking.

It is an object of the disclosed embodiments to provide a flush water supply device and flush toilet that can improve versatility.

The flush water supply device according to one aspect of the embodiment is a flush water supply device that supplies flush water to the toilet body, and is provided on a water inlet portion into which the wash water is introduced, and on the downstream side of the water inlet portion, A water supply valve unit including a water supply valve that opens and closes a flow path, is provided on the downstream side of the water supply valve unit, is provided on a vacuum breaker unit including a vacuum breaker, and is provided on the downstream side of the vacuum breaker unit, and wash water is led out. A first unit including the water inlet and the water supply valve, and a second unit including the vacuum breaker and the water outlet.

The first unit including the water inlet portion and the water supply valve portion and the second unit including the vacuum breaker portion and the water outlet portion are configured so as to be separable, so that the first unit and the first unit depending on the functions required for the flush toilet. Since the two units can be recombined, a highly versatile cleaning water supply device can be provided.

In addition, among the flow paths from the water inlet to the water outlet, the first flow path formed in the first unit is the second unit among the flow paths from the water inlet to the water outlet. It is characterized by being formed of a material having a higher rigidity than the second flow path formed in the above.

Since the cleaning water supply device is configured to be divided into the first unit and the second unit, the first unit and the second unit can be formed of different materials. Then, by forming the first flow path, which is required to have a relatively high strength, with a material having higher rigidity than the second flow path, the manufacturing cost can be kept low.

Further, the first unit is disposed in a lower portion of the second unit, and the water supply valve unit includes an upper housing having a plurality of upper screw holes into which screws are inserted from above, and the plurality of upper screw holes. And a lower housing having a plurality of lower screw holes formed therein, wherein at least one of the plurality of upper screw holes has the above-mentioned structure when the first unit and the second unit are viewed from above. It is characterized in that it is provided at a position hidden by the second unit.

In order to reduce the footprint of the flush water supply device, the screw holes used to fasten the upper and lower housings of the water supply valve section must be provided at a position hidden by the vacuum breaker section provided above the water supply valve section. You may not get it. Therefore, conventionally, the screw is inserted from the lower side, that is, the lower housing side. On the other hand, since the cleaning water supply device according to one aspect of the embodiment is configured to be divided into the first unit and the second unit, at least one of the plurality of upper screw holes is located at a position hidden by the second unit. Even if provided, it is possible to access all the upper screw holes from above by removing the second unit. Therefore, it is possible to improve workability and maintainability as compared with the related art.

Further, the second unit is characterized in that the second unit further includes a switching valve portion that is provided on the downstream side of the water supply valve portion and that switches the outflow destination of the wash water.

The switching valve portion provided on the downstream side of the water supply valve portion, that is, on the secondary side does not require high rigidity as compared with the water supply valve portion. Therefore, by including the switching valve unit in the second unit, it is possible to reduce the cost as compared with the case where the switching valve unit is included in the first unit.

Further, the vacuum breaker portion is provided in the water passage, a water passage having an inlet on the upstream side and a water outlet on the downstream side, an air inlet for communicating the water passage with the outside, and the washing water. By operating with the water pressure of the above, the water inlet and the water outlet are communicated with each other at the time of water passage, and the valve body which makes the water inlet and the air introduction port are communicated with each other at the time of non-water passage, and overflows from the air introduction port. A water receiving portion for receiving cleaning water, and the switching valve portion is provided on the downstream side of the vacuum breaker portion.

The switching valve goes through a state where the wash water flows out to both outflow destinations when the outflow destination of the wash water is switched from one outflow destination to another outflow destination. In this way, when the wash water flows out to both the outflow destinations, the flow rate of the wash water flowing to each outflow destination becomes smaller than the flow rate of the wash water flowing to the upstream side of the switching valve. Therefore, if a vacuum breaker is installed on the downstream side of the switching valve, the vacuum breaker valve body will not operate normally due to the decrease in water pressure due to the decrease in the flow rate, and the cleaning water to be supplied to the toilet body will be introduced into the atmosphere. May overflow from the mouth. For this reason, conventionally, the vacuum breaker is provided with a water receiving portion for receiving the wash water overflowing from the air inlet. On the other hand, on the upstream side of the switching valve, the decrease in flow rate as described above does not occur. Therefore, in the flush water supply device according to the aspect of the embodiment, the vacuum breaker is provided on the upstream side of the switching valve. As a result, it is possible to prevent a situation in which the valve body malfunctions due to a decrease in water pressure due to a decrease in flow rate. Since the occurrence of malfunction of the valve body is suppressed, the amount of wash water overflowing from the air introduction port is reduced, so that the water receiving portion can be made smaller than before. As a result, the washing water supply device can be downsized as compared with the conventional one.

A flush toilet according to an aspect of the embodiment is characterized by including any one of the flush water supply devices.

As a result, the manufacturing cost of the flush water supply device can be suppressed, so that the manufacturing cost of the flush toilet can be suppressed.

According to one aspect of the embodiment, it is possible to provide a flush water supply device and flush toilet which can improve versatility.

FIG. 1 is a diagram showing a configuration of a flush toilet according to the embodiment. FIG. 2A is a front view of the valve unit. FIG. 2B is a side view of the valve unit. FIG. 3A is a front sectional view around the vacuum breaker portion and the switching valve portion. FIG. 3B is a side sectional view around the vacuum breaker section and the switching valve section. FIG. 4A is an exploded perspective view of the valve unit. FIG. 4B is a separated front view of the valve unit. FIG. 4C is a separated side view of the valve unit. FIG. 5A is a plan view of a flush toilet incorporating a flush water supply device. FIG. 5B is a plan view showing a state in which the second unit is removed from the valve unit. FIG. 6A is a diagram showing a configuration of a valve unit according to the first modification. FIG. 6B is a diagram showing the configuration of the valve unit according to the second modification.

Hereinafter, embodiments of the flush water supply device and flush toilet disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

<1. Structure of flush toilet>
First, the configuration of the flush toilet according to the embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of a flush toilet according to the embodiment.

As shown in FIG. 1, a flush toilet 100 according to an embodiment is disposed, for example, on a toilet body 200 that is placed on the floor of a toilet room, and behind the toilet body 200, and flushes the toilet body 200 with flush water. And a cleaning water supply device 1 for supplying.

The toilet body 200 has a bowl portion 210 that receives dirt, and a drain trap conduit 220 that extends rearward from the bottom of the bowl portion 210. The bowl 210 has a rim spout 212 for spouting rim and a jet spout 214 for jet spout. The rim spout 212 is formed in the upper rear part of the bowl 210 and discharges the cleaning water along the upper edge of the bowl 210. The jet water spouting port 214 is formed at the bottom of the bowl 210 and discharges the washing water toward the drain trap conduit 220. The drain trap conduit 220 forms a sealed water and communicates with a sewer pipe (not shown).

The cleaning water supply device 1 is provided with a valve unit 600 controlled by a control unit (not shown), a tank 800 provided downstream of the valve unit 600 for storing cleaning water, and a downstream of the tank 800 to pressurize the cleaning water. And a pressure pump 900.

On the upstream side of the valve unit 600, a water supply passage 320 for supplying wash water from a water supply source (not shown) is connected. Further, on the downstream side of the valve unit 600, a rim side water supply passage 340 for supplying cleaning water to the rim spout 212 and a tank side water supply passage 360 for supplying cleaning water to the tank 800 are connected.

The valve unit 600 includes a water inlet 610, a constant flow valve 620 provided downstream of the water inlet 610, and a diaphragm-type water supply valve portion 640 provided downstream of the constant flow valve 620. Further, the valve unit 600 includes a vacuum breaker section 680 provided downstream of the water supply valve section 640, a switching valve section 660 provided downstream of the vacuum breaker section 680, and a water outlet section 670 provided downstream of the switching valve section 660. With.

The water inlet 610 is connected to the water supply passage 320, and wash water from a water supply source (not shown) is introduced. The constant flow valve 620 keeps the flow rate of the wash water flowing from the water supply passage 320 into the constant flow valve 620 to the downstream side constant. The water supply valve unit 640 switches between flushing and stopping the flush water at the rim spout 212 and the jet spout 214 by opening and closing the water supply valve.

The vacuum breaker unit 680 is configured to include a vacuum breaker 687 that prevents backflow of washing water. The switching valve unit 660 supplies the wash water toward the rim side water supply passage 340 or the tank side water supply passage 360. The cleaning water overflowing from the vacuum breaker is collected by the water receiving portion 684 of the vacuum breaker portion 680 and then discharged into the tank 800 by the drainage channel 390 connected to the bottom surface of the water receiving portion 684.

The water outlet 670 is connected to the rim-side water supply passage 340, is connected to the rim-side water outlet 671 for deriving the wash water to the rim-side water supply passage 340, and is connected to the tank-side water supply passage 360. And a tank side water outlet 672 for deriving the wash water.

A pump side water supply passage 370 is connected to a lower portion of the tank 800, and a pressurizing pump 900 is connected to a downstream end of the pump side water supply passage 370. The pressurizing pump 900 is connected to the jet water outlet 214 by the jet side water supply passage 380, pressurizes the wash water stored in the tank 800, and supplies the cleaning water to the jet water outlet 214 via the jet side water supply passage 380.

The valve unit 600 according to the embodiment includes a first unit 601 including a water inlet 610, a constant flow valve 620 and a water supply valve 640, and a second unit 602 including a vacuum breaker 680, a switching valve 660 and a water outlet 670. It can be divided into. The configuration of the valve unit 600 will be specifically described below.

<2. Structure of valve unit>
A specific configuration of the valve unit 600 will be described with reference to FIGS. 2A to 3B. 2A is a front view of the valve unit 600, and FIG. 2B is a side view of the same. Further, FIG. 3A is a front sectional view around the vacuum breaker portion 680 and the switching valve portion 660, and FIG. 3B is a side sectional view thereof.

In the following, in order to clarify the positional relationship, mutually orthogonal X-axis, Y-axis, and Z-axis are defined, and the Z-axis positive direction is defined as a vertically upward direction.

As shown in FIGS. 2A to 3B, the valve unit 600 includes a first unit 601 and a second unit 602.

The first unit 601 is disposed below the second unit 602, and includes a water inlet 610, a constant flow valve 620 (see FIG. 3A), and a water supply valve 640. The water inlet 610, the constant flow valve 620, and the water supply valve 640 are arranged side by side in the horizontal direction (here, the X-axis direction). The water inlet 610 has a water inlet 611 that opens in the horizontal direction, and guides the cleaning water introduced from the water inlet 611 to the constant flow valve 620 and the water supply valve 640. The constant flow valve 620 is provided, for example, at a position downstream of the water inlet 611 in the water inlet 610.

As shown in FIG. 3A, the water supply valve unit 640 includes a pressure chamber 641, a water supply valve 642, a solenoid valve 643, and a housing 644. The pressure chamber 641 has a water inlet 641a communicating with the water inlet 610 and a water outlet 641b communicating with the vacuum breaker 680. The water inlet 641a opens in the horizontal direction, and the water outlet 641b opens in the vertical direction. The water supply valve 642 is provided inside the pressure chamber 641 and closes or opens the water outlet 641b so as to switch between flushing and stopping the flush water downstream of the water outlet 641b.

The solenoid valve 643 is provided on the side of the pressure chamber 641. When the solenoid valve 643 is opened, the pressure in the pressure chamber 641 is released, and the water supply valve 642 is pushed down by the water pressure of the wash water. As a result, the water outlet 641b is opened and the cleaning water flows into the vacuum breaker unit 680. On the other hand, when the electromagnetic valve 643 is closed, the pressure in the pressure chamber 641 increases, and the water supply valve 642 is pushed up. As a result, the water outlet 641b is closed, and the supply of cleaning water to the vacuum breaker unit 680 is stopped.

The housing 644 has an upper housing 645 and a lower housing 646, and is formed by vertically assembling these. The pressure chamber 641 described above is formed inside the housing 644. The upper housing 645 is provided above the lower housing 646 and forms a space above the water supply valve 642 in the pressure chamber 641. Further, the lower housing 646 forms a space below the water supply valve 642 in the pressure chamber 641. The upper housing 645 is integrally formed with the water inlet 610.

As shown in FIGS. 2A and 2B, an upper flange portion 647 is provided on the outer peripheral portion of the upper housing 645, and a lower flange portion 648 is provided on the outer peripheral portion of the lower housing 646. A plurality of upper screw holes 647a into which the screws S are inserted from above are formed in the upper flange portion 647 along the circumferential direction. Further, the lower flange portion 648 is formed with a plurality of lower screw holes 648a at positions corresponding to the plurality of upper screw holes 647a.

The housing 644 is formed by inserting screws S into the upper screw holes 647a and the corresponding lower screw holes 648a and fastening the upper housing 645 and the lower housing 646 with the screws S.

On the other hand, the second unit 602 is arranged above the first unit 601 and includes a vacuum breaker section 680, a switching valve section 660 and a water outlet section 670 (rim side water outlet section 671 and tank side water outlet section 672). ..

As shown in FIG. 3B, the vacuum breaker unit 680 includes a vacuum breaker 687 and a water receiving unit 684. Further, the vacuum breaker 687 includes a water passage 681, an atmosphere introduction port 682, and a valve body 683.

The water passage 681 has a water inlet 685 on the upstream side (water supply valve portion 640 side) and a water outlet 686 on the downstream side (switching valve portion 660 side). The water inlet 685 opens in the vertical direction, and the water outlet 686 opens in the horizontal direction. The air inlet 682 is an opening that connects the water passage 681 and the outside, is provided above the water inlet 685, and opens in the vertical direction.

The valve body 683 is provided in the water passage 681 and moves up and down in the water passage 681 by the water pressure of the wash water. The valve body 683 rises due to water pressure to communicate the water inlet 685 and the water outlet 686 when passing water, and descends due to its own weight when not passing water to communicate the water inlet 685 and the atmosphere inlet 682.

The water receiver 684 is provided above the atmosphere inlet 682. The water receiving portion 684 communicates with the atmosphere introducing port 682 and receives the wash water overflowing from the atmosphere introducing port 682. The drainage channel 390 (see FIG. 1) is connected to the bottom surface of the water receiving section 684, and the wash water collected by the water receiving section 684 is discharged to the tank 800 via the drainage channel 390.

The switching valve unit 660 includes a fixed valve body 661, a movable valve body 662, a shaft 666, a motor 667, and a casing portion 668. The fixed valve body 661 has a disc-shaped facing surface 661a, and an inlet 663 into which wash water flows and two outlets 664 and 665 are formed in the facing surface 661a. The inflow port 663 and the two outflow ports 664 and 665 have, for example, a shape that expands in a fan shape from the central portion of the facing surface 661a toward the outer peripheral portion, and are arranged side by side in a circumferential shape with respect to the facing surface 661a. The inflow port 663 and the two outflow ports 664 and 665 both open in the horizontal direction.

The inflow port 663 of the switching valve unit 660 is located at the same height as the water outlet port 686 of the vacuum breaker unit 680 and is connected to the water outlet port 686. Further, of the two outflow ports 664 and 665, the outflow port 664 communicates with the rim side water outlet 671 and the outflow port 665 communicates with the tank side water outlet 672.

The rim-side water outlet 671 is connected to the rim-side water supply passage 340 and guides the wash water to the rim-side water supply passage 340. Further, the tank side water outlet 672 is connected to the tank side water supply passage 360 and guides the wash water to the tank side water supply passage 360. The rim-side water outlet portion 671 and the tank-side water outlet portion 672 are switching valve portions when the arrangement direction of the vacuum breaker portion 680 and the switching valve portion 660 (the direction perpendicular to the paper surface in FIG. 3A) is the front-back direction of the switching valve portion 660. Each of them is provided on the side of 660 (direction perpendicular to the paper surface in FIG. 3B).

Note that, here, an example in which the two fixed flow valve 661 are provided with the two outflow ports 664 and 665 will be described. However, the fixed valve disc 661 may be formed with three or more outflow ports. Further, the fixed valve body 661 constitutes a flow path from the water supply valve portion 640 to the vacuum breaker portion 680. The flow path extends upward (see FIG. 3B), and the wash water flows up the flow path into the vacuum breaker unit 680.

The movable valve body 662 has, for example, a fan shape, and is provided at a position in contact with the facing surface 661a of the fixed valve body 661. The shaft 666 rotatably supports the movable valve body 662, and the motor 667 rotates the shaft 666. The motor 667 rotates the shaft 666, and the movable valve body 662 rotates in accordance with the rotation of the shaft 666, so that the movable valve body 662 slides along the facing surface 661 a and the opening areas of the outlet ports 664 and 665. Change. As the motor 667, for example, a stepping motor can be used.

The switching valve unit 660 slides the movable valve body 662 and closes one of the outflow ports 664 and 665 with the movable valve body 662, so that the outflow destination of the wash water flowing from the inflow port 663 is discharged to the rim. It is possible to switch between the water outlet 212 and the tank 800. For example, when the outflow port 665 is closed by the movable valve body 662, the wash water flowing from the inflow port 663 flows out to the rim water discharge port 212 via the outflow port 664. On the other hand, when the outflow port 664 is closed by the movable valve body 662, the wash water flowing from the inflow port 663 flows out to the tank 800 via the outflow port 665.

FIG. 4A is a separated perspective view of the valve unit 600, FIG. 4B is a separated front view thereof, and FIG. 4C is a separated side view thereof.

As shown in FIGS. 4A to 4C, the valve unit 600 according to the embodiment can be separated into a first unit 601 and a second unit 602. With this, the first unit 601 and the second unit 602 can be appropriately combined, so that, for example, when it is desired to change the configuration of the vacuum breaker unit 680, only the second unit is newly manufactured to be the existing first unit 601. Just assemble. As described above, according to the valve unit 600 according to the embodiment, it is possible to provide the cleaning water supply device 1 having high versatility.

Further, by making the valve unit 600 separable into the first unit 601 and the second unit 602, it is possible to select a material according to the required strength for each unit.

Specifically, in the valve unit 600 according to the embodiment, among the flow paths from the water inlet 610 to the water outlet 670 (rim side water outlet 671 and tank side water outlet 672), the first unit 601 is formed. One flow passage P1 (see FIG. 3A) is formed of a material having higher rigidity than the second flow passage P2 (see FIG. 3B) formed in the second unit 602 among the above flow passages. As described above, the first flow path P1 that is a primary-side flow path that is required to have a relatively high strength is formed of a material having higher rigidity than the second flow path P2 that is a secondary-side flow path. The cost can be kept low.

The first flow path P1 is configured by the water inlet section 610 and the upper housing 645 and the lower housing 646 of the water supply valve section 640, and the second flow channel P2 is configured by the switching valve section 660 and the vacuum breaker section 680. .. The water inlet section 610, the upper housing 645, and the lower housing 646 that form the first flow path P1 are formed of, for example, PPS (polyphenylene sulfide), and the switching valve section 660 and the vacuum breaker section 680 that form the second flow path P2. Is formed of POM (polyacetal) or PP (polypropylene).

Next, the configuration of the connecting portion of the first unit 601 and the second unit 602 will be described. The water supply valve portion 640 of the first unit 601 includes a cylindrical connecting convex portion 650a that opens in the vertical direction on the downstream side of the water outlet 641b (see FIG. 3A). Further, the fixed valve body 661 of the second unit 602 has a cylindrical shape having a larger inner diameter than the connection convex portion 650a and opening in the vertical direction on the upstream side of the water inlet 685 (see FIG. 3B) of the vacuum breaker portion 680. Connection recess 650b.

As shown in FIG. 3B, the first unit 601 and the second unit 602 are connected by fitting the connection protrusion 650a and the connection recess 650b. Further, as a result, a flow path from the water supply valve portion 640 of the first unit 601 to the vacuum breaker portion 680 of the second unit 602 is formed. A seal member 650c such as an O-ring is provided between the connection protrusion 650a and the connection recess 650b.

Further, as shown in FIG. 4A, a first engaging portion 651 and a second engaging portion 653 are provided on the outer peripheral side of the connecting convex portion 650a with a predetermined distance from the connecting convex portion 650a. The first engaging portion 651 communicates with the first groove portion 651a that extends along the vertical direction, the second groove portion 651b that communicates with the first groove portion 651a, and extends along the circumferential direction of the connection convex portion 650a, and the first groove portion 651b. The projection portion 651c that narrows the width of the two-groove portion 651b is provided. The second engaging portion 653 also has a third groove portion 653a extending along the circumferential direction of the connecting convex portion 650a.

Further, as shown in FIG. 4C, the outer peripheral surface of the connection recess 650b is provided with a first protrusion 652 and a second protrusion 654 protruding outward in the radial direction of the connection recess 650b.

Then, as shown in FIG. 4B, the second unit 602 is lowered to fit the first convex portion 652 into the first groove portion 651a of the first engaging portion 651, and then the second unit 602 is twisted to make the first unit. The first protrusion 652 is moved along the second groove 651b until the protrusion 652 gets over the protrusion 651c. As a result, the first convex portion 652 and the first engaging portion 651 are engaged with each other. Further, by performing the above operation, the second convex portion 654 is fitted into the third groove portion 653a of the second engaging portion 653, and the second convex portion 654 and the second engaging portion 653 are engaged with each other.

In this way, the first engaging portion 651 and the first convex portion 652 are engaged with each other, and the second engaging portion 653 and the second convex portion 654 are engaged with each other. Even if an upward force is applied, the second unit 602 can be prevented from coming off the first unit 601. Therefore, the connection between the first unit 601 and the second unit 602 can be made more reliable.

FIG. 5A is a plan view of a flush toilet 100 incorporating the flush water supply device 1. Further, FIG. 5B is a plan view showing a state in which the second unit 602 is removed from the valve unit 600.

As shown in FIG. 5A, the first unit 601 is arranged below the second unit 602, and when the first unit 601 and the second unit 602 are viewed from above, a plurality of units provided in the first unit 601 are provided. A part of the upper screw hole 647a of the above is provided at a position hidden by the second unit 602. In the conventional valve unit, the upper screw hole that cannot be seen from above cannot be accessed from above, so the screw is inserted from below, that is, from the lower housing side. However, in this case, the entire valve unit had to be removed from the flush toilet 100, and there was room for improvement in terms of workability and maintainability.

On the other hand, since the valve unit 600 according to the embodiment can be divided into the first unit 601 and the second unit 602, at least one of the plurality of upper screw holes 647a is provided at a position hidden by the second unit 602. However, as shown in FIG. 5B, by removing the second unit 602, the screws S can be inserted into all the upper screw holes 647a from above. Therefore, it is possible to improve workability and maintainability as compared with the related art.

<3. Valve knit rearrangement example>
Next, an example of changing the valve unit 600 will be described with reference to FIGS. 6A and 6B. FIG. 6A is a diagram showing a configuration of a valve unit according to the first modification. FIG. 6B is a diagram showing the configuration of the valve unit according to the second modification.

For example, as shown in FIG. 6A, the valve unit 600A according to the first modification is configured by assembling the second unit 602A with the first unit 601. The second unit 602A has a flow path on the downstream side of the switching valve section 660, specifically, a flow path from the switching valve section 660 to the tank 800 and a flow path from the switching valve section 660 to the rim spout 212. , And a vacuum breaker unit 680, respectively.

Further, as shown in FIG. 6B, the valve unit 600B according to the second modification is configured by assembling the second unit 602B with the first unit 601. The second unit 602B includes a vacuum breaker portion 680 and does not include a switching valve portion 660. The valve unit 600B is incorporated in, for example, a toilet body having a single spout.

In addition, as the second unit, the switching destination of the switching valve unit is changed to three systems (in addition to the rim spout 212 and the tank 800, a hand washing device, a local cleaning nozzle, etc.), and a flow path switching unit from the motor 667. It is also possible to combine a solenoid valve or one changed to manual with the first unit 601.

Also, regarding the first unit, for example, the diameter of the water supply valve 642 is changed according to the required flow rate, or the opening means of the water supply valve 642 is changed from the solenoid valve 643 to a stepping motor, a servomotor, or a manual unit. Can be appropriately combined with the above-described second units 602, 602A, 602B and the like.

As described above, by appropriately combining the first unit and the second unit, it becomes possible to cope with a wide variety of toilet body while suppressing the manufacturing cost.

<4. Other configurations of valve unit>
In the valve unit 600 according to the embodiment, the vacuum breaker section 680 is provided on the upstream side of the switching valve section 660. This point will be described.

The switching valve unit 660 is in a state where both the outlets 664 and 665 are in communication with the inlet 663 when the outlet 664 is opened and the outlet 665 is opened. Goes out from both outlets 664 and 665 (the state shown in FIG. 3A). In this state, the flow rate of the wash water flowing through the outlets 664 and 665 is smaller than the flow rate of the wash water flowing upstream of the switching valve section 660.

On the other hand, the vacuum breaker unit 680 according to the flush water supply device 1 according to the embodiment is provided on the upstream side of the switching valve unit 660. Therefore, the occurrence of malfunction of the valve body 683 due to the decrease in water pressure is suppressed, and the amount of overflow water can be reduced. As a result, the water receiving portion 684 can be made smaller than the conventional one, so that the cleaning water supply device 1 can be made smaller than the conventional one.

As shown in FIG. 3B, the casing portion 668 is arranged so as to face the facing surface 661a of the fixed valve body 661 with the movable valve body 662 interposed therebetween, and together with the fixed valve body 661, wash water from the inflow port 663 to the outflow ports 664, 665 is discharged. To form an internal space that serves as a flow path.

In the wash water supply device 1 according to the embodiment, the switching valve unit 660, the rim side water supply passage 340, the tank side water supply passage 360, and the like, which are arranged on the downstream side of the vacuum breaker unit 680, are located above the upper surface of the vacuum breaker unit 680. It is placed in a low position. Specifically, the switching valve unit 660, the rim side water supply passage 340, the tank side water supply passage 360, and the like are arranged at a position lower than the upper surface of the water receiving portion 684.

Here, it is specified that the attachment position of the vacuum breaker portion 680 must be higher than the overflow surface of the toilet body 200 by a predetermined amount or more. Therefore, the vacuum breaker portion 680 cannot be attached at a position lower than the regulation. Therefore, in the flush water supply device 1 according to the embodiment, the switching valve portion 660, the rim side water supply passage 340, the tank side water supply passage 360, and the like are provided below the vacuum breaker portion 680. As a result, the height dimension of the wash water supply device 1 can be made as low as possible, and the wash water supply device 1 can be further downsized.

Further, as shown in FIG. 3A, in the switching valve section 660 according to the embodiment, the outlets 664 and 665 are formed below the inlet 663.

Since residual water may occur downstream of the vacuum breaker section 680, when the switching valve section 660 is provided downstream of the vacuum breaker section 680, residual water may occur in the switching valve section 660. The residual water is accumulated in the space below the outlets 664 and 665 in the switching valve unit 660.

In the conventional switching valve portion, the outflow port is formed above the inflow port. Therefore, if the conventional switching valve section is provided on the downstream side of the vacuum breaker section, a large amount of residual water may be generated in the switching valve section. For this reason, conventionally, the switching valve portion has been provided upstream of the vacuum breaker portion so that residual water does not occur in the switching valve portion.

On the other hand, in the flush water supply device 1 according to the embodiment, the outlets 664 and 665 are formed below the inlet 663 as a measure against residual water in the switching valve portion 660. As a result, the space below the outlets 664 and 665 in the switching valve portion 660 becomes smaller than in the case where the outlet is formed above the inlet like the conventional switching valve portion. Therefore, it is possible to reduce the amount of residual water in the switching valve unit 660 as compared with the conventional switching valve unit, and it is possible to suppress the occurrence of water flow failure or damage due to residual water during freezing.

Further, in the flush water supply device 1 according to the embodiment, as shown in FIG. 3B, among the facing surfaces of the casing portion 668 of the switching valve portion 660 that face the fixed valve body 661, the facing surfaces that face the outlet ports 664 and 665. 668a is closer to the fixed valve body 661 than the facing surface 668b facing the inflow port 663.

As a result, the volume of the space below the outlets 664 and 665, which is the space where the residual water is generated, can be made smaller, so that the amount of the residual water accumulated in the space can be reduced. Therefore, the residual water in the switching valve unit 660 can be further reduced.

Further, in the flush water supply device 1 according to the embodiment, in order to discharge the residual water in the switching valve portion 660 to the outside of the switching valve portion 660, as shown in FIG. 3A, the movable valve body 662 of the switching valve portion 660 is used. The discharge paths 669 and 669 are provided for the above.

The movable valve body 662 includes discharge passages 669 and 669 on the surface facing the casing portion 668 (see FIG. 3B). The discharge paths 669, 669 are, for example, grooves that linearly extend from the peripheral edge of the movable valve body 662 facing the rotation direction outside of the movable valve body 662 to the peripheral edge of the movable valve body 662 facing the rotation direction. is there. One of the two discharge paths 669 and 669 extends toward the outflow port 664, and the other extends toward the outflow port 665.

As described above, the residual water collects in the space below the outlets 664 and 665 in the switching valve unit 660. The discharge paths 669 and 669 extend to spaces below the outlets 664 and 665, and the wash water accumulated in the spaces flows from the lower ends of the discharge paths 669 and 669 to the discharge paths 669 and 669 by capillary action. After rising and moving to the upper end, it is discharged from the outlets 664 and 665 to the outside of the switching valve unit 660.

As described above, in the flush water supply device 1 according to the embodiment, the residual water in the switching valve unit 660 is guided to the outlets 664 and 665 by the capillarity using the discharge passages 669 and 669, and is switched from the outlets 664 and 665. It is decided to discharge to the outside of the valve unit 660. Therefore, the residual water in the switching valve unit 660 can be further reduced.

The lower ends of the discharge paths 669 and 669 are always located at the lowest positions of the outlets 664 and 665 in the movable range of the movable valve body 662 whose both ends are the state where the outlet 665 is closed and the state where the outlet 664 is closed. It is preferably provided in the following places. As a result, the cleaning water collected in the outflow ports 664 and 665 can be more reliably discharged to the outside of the switching valve section 660.

Here, an example in which the movable valve body 662 is provided with the two discharge passages 669 and 669 has been described, but the movable valve body 662 may be provided with at least one discharge passage 669. Further, here, the example in which the movable valve body 662 is provided with the linear discharge passages 669 and 669 has been described, but the discharge passage does not necessarily have to be a straight line, and may be, for example, a curved line or a wavy line. It may be formed in a zigzag shape.

Although the discharge passage 669 is provided in the movable valve body 662 here, the discharge passage may be provided in the fixed valve body 661. For example, the fixed valve body 661 has one end provided at a position below the lowest position of the outflow ports 664 and 665, and the other end having a groove communicating with any of the outflow ports 664 and 665 as a discharge path. Good. Further, it is possible to provide a discharge passage in both the movable valve body 662 and the fixed valve body 661.

Further, here, the discharge passages 669 and 669 are provided on the surface of the movable valve body 662 facing the casing portion 668, but the discharge passages may be provided on the peripheral surface of the movable valve body 662. The surface of the movable valve body 662 facing the casing portion 668 (see FIG. 3B) may be embossed, and the embossed surface may be used as the discharge passage.

As described above, the flush water supply device 1 according to the embodiment includes the water inlet 610, the water supply valve 640, the vacuum breaker 680, and the water outlet 670. Cleaning water is introduced into the water inlet 610. The water supply valve unit 640 includes a water supply valve 642 that is provided on the downstream side of the water supply unit 610 and that opens and closes the flow path. The vacuum breaker unit 680 is provided on the downstream side of the water supply valve unit 640 and includes a vacuum breaker 687. The water outlet 670 is provided on the downstream side of the vacuum breaker portion 680, and the cleaning water is discharged. Further, the wash water supply device 1 according to the embodiment is configured to be dividable into a first unit 601 including a water inlet 610 and a water supply valve 640, and a second unit 602 including a vacuum breaker 680 and a water outlet 670. It

Therefore, according to the flush water supply device 1 according to the embodiment, versatility can be improved.

Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents.

1 Wash water supply device 600 Valve unit 610 Water inlet 620 Constant flow valve 640 Water inlet valve 660 Switching valve 680 Vacuum breaker 670 Water outlet 671 Rim side outlet 672 Tank side outlet

Embodiments of the disclosure relate to a first unit of a flush water supply device and a flush toilet including the first unit .

The disclosed embodiments aim to provide a technique capable of improving the versatility of a wash water supply device .

The first unit of the flush water supply device according to one aspect of the embodiment is a first unit that constitutes a part of the flush water supply device that supplies flush water to the toilet body, and is a water inlet part into which flush water is introduced. And a water supply valve portion that is provided on the downstream side of the water inlet portion and includes a water supply valve that opens and closes a flow path, and is a second unit that constitutes a part of the cleaning water supply device, and is a vacuum breaker. a vacuum breaker unit including the provided downstream of the vacuum breaker unit is attachable to the upstream side of the second unit Ru and a water output of the washing water is derived.

As a result, the first unit and the second unit can be recombined according to, for example, the function required for the flush toilet, so that the versatility of the flush water supply device can be improved .

In addition, among the flow paths from the water inlet to the water outlet, the first flow path formed in the first unit is the second unit among the flow paths from the water inlet to the water outlet. Ru is formed by a material having higher rigidity than the second flow path formed.

This makes it possible to form the first unit and the second unit with different materials. Then, by forming the first flow path, which is required to have a relatively high strength, with a material having higher rigidity than the second flow path, the manufacturing cost can be kept low.

Further, the water supply valve portion is provided with a cylindrical connecting convex portion that opens in the vertical direction on the downstream side, and is attached to the second unit via a seal member at the connecting convex portion .

By providing the connecting protrusion on the first unit having high rigidity, it is possible to reduce the risk that the connecting protrusion breaks and separates as compared with the case where the connecting protrusion is provided on the second unit. Further, since the connection convex portion is provided in the upstream first unit, it is possible to reduce the step difference on the flow path. Further, since the connecting convex portion is provided with the seal member, it is possible to connect the both while securing the sealing property only by inserting it into the second unit. Therefore, the rearrangement is easy.

Also, the flush toilet according to an aspect of the embodiment, Ru comprises any one of the first unit of the flush water supply device.

According to one aspect of the embodiment, the versatility of the wash water supply device can be improved .

An embodiment of a first unit of a flush water supply device disclosed in the present application and a flush toilet including the first unit will be described in detail below with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

Therefore, according to the flush water supply device 1 according to the embodiment, the first unit and the second unit can be recombined in accordance with the function or the like required for the flush toilet, so that versatility can be improved.
Further, the first unit is disposed in a lower portion of the second unit, and the water supply valve unit includes an upper housing having a plurality of upper screw holes into which screws are inserted from above, and the plurality of upper screw holes. And a lower housing having a plurality of lower screw holes formed therein, wherein at least one of the plurality of upper screw holes is the above-mentioned when the first unit and the second unit are viewed from above. It is characterized in that it is provided at a position hidden by the second unit.
In order to reduce the footprint of the flush water supply device, the screw holes used to fasten the upper and lower housings of the water supply valve must be provided at a position hidden by the vacuum breaker provided above the water supply valve. You may not get it. Therefore, conventionally, the screw is inserted from the lower side, that is, the lower housing side. On the other hand, since the cleaning water supply device according to one aspect of the embodiment is configured to be divided into the first unit and the second unit, at least one of the plurality of upper screw holes is located at a position hidden by the second unit. Even if provided, it is possible to access all the upper screw holes from above by removing the second unit. Therefore, it is possible to improve workability and maintainability as compared with the related art.
Further, the second unit is characterized in that the second unit further includes a switching valve portion that is provided on the downstream side of the water supply valve portion and that switches the outflow destination of the wash water.
The switching valve section provided on the downstream side of the water supply valve section, that is, on the secondary side does not require high rigidity as compared with the water supply valve section. Therefore, by including the switching valve unit in the second unit, it is possible to reduce the cost as compared with the case where the switching valve unit is included in the first unit.
Further, the vacuum breaker portion is provided in the water passage, a water passage having an inlet on the upstream side and a water outlet on the downstream side, an air inlet for communicating the water passage with the outside, and the washing water. By operating by the water pressure of the valve, the water inlet and the water outlet are communicated with each other at the time of water passage, and the valve body for communicating the water inlet and the atmosphere inlet at the time of non-water passage, and overflowed from the atmosphere inlet. A water receiving portion for receiving cleaning water, and the switching valve portion is provided on the downstream side of the vacuum breaker portion.
The switching valve goes through a state where the wash water flows out to both outflow destinations when the outflow destination of the wash water is switched from one outflow destination to another outflow destination. In this way, when the wash water flows out to both outflow destinations, the flow rate of the wash water flowing to each outflow destination becomes smaller than the flow rate of the wash water flowing to the upstream side of the switching valve. Therefore, if a vacuum breaker is installed on the downstream side of the switching valve, the valve body of the vacuum breaker does not operate normally due to the decrease in water pressure due to the decrease in the flow rate, and the flush water to be supplied to the toilet body is introduced into the atmosphere. May overflow from the mouth. For this reason, conventionally, the vacuum breaker is provided with a water receiving portion for receiving the wash water overflowing from the air inlet. On the other hand, on the upstream side of the switching valve, the decrease in flow rate as described above does not occur. Therefore, in the flush water supply device according to the aspect of the embodiment, the vacuum breaker is provided on the upstream side of the switching valve. As a result, it is possible to prevent the malfunction of the valve element due to the decrease in water pressure due to the decrease in flow rate. Since the occurrence of malfunction of the valve body is suppressed, the amount of wash water overflowing from the atmosphere introduction port is reduced, so that the water receiving portion can be made smaller than before. As a result, the washing water supply device can be downsized as compared with the conventional one.

Claims (2)

A flush water supply device for supplying flush water to the toilet body,
An inlet part where cleaning water is introduced,
A water supply valve portion that is provided on the downstream side of the water inlet portion and includes a water supply valve that opens and closes a flow path,
A vacuum breaker unit provided on the downstream side of the water supply valve unit and including a vacuum breaker,
A water outlet provided on the downstream side of the vacuum breaker and from which cleaning water is discharged,
A wash water supply device, which is dividable into a first unit including the water inlet portion and the water supply valve portion and a second unit including the vacuum breaker portion and the water outlet portion. A flush toilet comprising the flush water supply device according to claim 1.