JP7136144B2 - Second unit of flush water supply device and flush toilet - Google Patents

Description

The disclosed embodiments relate to a second unit of a flush water supply device and a flush toilet comprising this second unit.

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

The cleansing water supply device includes, for example, a water supply valve section for switching between spouting and stopping cleansing water to the bowl section, a switching valve section for switching the outflow destination of cleansing water, a vacuum breaker for preventing backflow of cleansing water, and the like. Conventionally, these have been integrally formed by a mold or the like.

WO2005/098152

However, since the conventional washing water supply device is integrally formed as described above, even if a part of the structure is changed, for example, the entire device must be newly manufactured. was lacking.

An object of the disclosed embodiments is to provide a technology capable of improving the versatility of a cleaning water supply device .

The second unit of the flush water supply device according to one aspect of the embodiment is a second unit that constitutes a part of the flush water supply device that supplies flush water to the toilet bowl body, and is a water inlet into which flush water is introduced. a connection portion with a first unit provided downstream of the water inlet portion and including a water supply valve that opens and closes a flow path; a vacuum breaker portion including a vacuum breaker; a water outlet section provided downstream of the breaker section and from which wash water is discharged ; An engaging portion for engaging the unit and the second unit is provided. The second unit according to one aspect of the embodiment is removable from the first unit.

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

Further, among the flow paths from the water inlet section to the water outlet section, the first flow path formed in the first unit is the flow path from the water inlet section to the water outlet section that is formed in the second unit. It is formed of a material having a higher rigidity than the second flow path formed in .

This makes it possible to form the first unit and the second unit from different materials. Further, by forming the first channel, which requires relatively high strength, from a material with higher rigidity than the second channel, the manufacturing cost can be kept low.

Further, the water supply valve portion has a cylindrical connection protrusion opening in the vertical direction on the downstream side, and is attached to the second unit via a seal member at the connection protrusion .

By providing the connection protrusion on the first unit having high rigidity, it is possible to reduce the risk of the connection protrusion being broken and detached compared to when the connection protrusion is provided on the second unit. In addition, since the first unit on the upstream side is provided with the connection projection, it is possible to reduce steps on the flow path. Furthermore, since the connecting protrusion is provided with a sealing member, the two can be connected while ensuring the sealing performance simply by inserting them into the second unit. Therefore, recombination is easy.

A flush toilet according to an aspect of the embodiment includes any one of the second units of the flush water supply device.

According to one aspect of the embodiment, it is possible to improve the versatility of the cleaning water supply device .

FIG. 1 is a diagram showing the configuration of a flush toilet according to an 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 cross-sectional view of the vicinity of the vacuum breaker section and the switching valve section. FIG. 3B is a side cross-sectional view of the vacuum breaker section and the switching valve section. FIG. 4A is an exploded perspective view of the valve unit. FIG. 4B is an isolated front view of the valve unit. FIG. 4C is an isolated 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 where the second unit is removed from the valve unit; FIG. 6A is a diagram showing the configuration of a valve unit according to a first modified example. FIG. 6B is a diagram showing a configuration of a valve unit according to a second modified example;

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, embodiment of the 2nd unit of the flush water supply apparatus which this application discloses, and a flush toilet provided with this 2nd unit is described in detail. In addition, this invention is not limited by embodiment shown below.

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

As shown in FIG. 1, the flush toilet 100 according to the embodiment includes, for example, a toilet body 200 that is placed on the floor of a toilet room, and a toilet body 200 that is arranged behind the toilet body 200 so that flush water is applied to the toilet body 200. and a cleaning water supply device 1 that supplies the

The toilet body 200 has a bowl portion 210 for receiving waste and a drain trap line 220 extending rearwardly from the bottom of the bowl portion 210 . The bowl portion 210 is formed with a rim spout 212 for spouting rim water and a jet spout 214 for spouting jet water. The rim spout 212 is formed in the upper rear portion of the bowl portion 210 and spouts cleansing water along the upper edge of the bowl portion 210 . A jet spout 214 is formed at the bottom of the bowl portion 210 and spouts wash water toward the drain trap line 220 . The drain trap line 220 forms a water seal and communicates with a sewage pipe (not shown).

The cleansing water supply apparatus 1 includes a valve unit 600 controlled by a control unit (not shown), a tank 800 provided downstream of the valve unit 600 to store cleansing water, and a tank 800 provided downstream of the tank 800 to pressurize the cleansing water. A pressure pump 900 is provided.

The upstream side of the valve unit 600 is connected with a water supply passage 320 for supplying cleaning water from a water supply source (not shown). A rim-side water supply passage 340 for supplying washing water to the rim spout 212 and a tank-side water supply passage 360 for supplying washing water to the tank 800 are connected to the downstream side of the valve unit 600 .

The valve unit 600 includes a water inlet section 610 , a constant flow valve 620 provided downstream of the water inlet section 610 , and a diaphragm-type water supply valve section 640 provided downstream of the constant flow valve 620 . The valve unit 600 also 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. and

The water inlet section 610 is connected to the water supply path 320 and receives washing water from a water supply source (not shown). The constant flow valve 620 maintains a constant flow rate of washing water flowing downstream from the water supply path 320 into the constant flow valve 620 . The water supply valve unit 640 switches between spouting and stopping cleansing water from the rim spout 212 and the jet spout 214 by opening and closing the water supply valve.

The vacuum breaker section 680 includes a vacuum breaker 687 that prevents backflow of wash water. The switching valve portion 660 supplies wash water toward the rim-side water supply passage 340 or the tank-side water supply passage 360 . Washing water overflowing from the vacuum breaker is collected by the water receiving portion 684 of the vacuum breaker portion 680 and then discharged to the tank 800 through 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 and connected to the rim-side water supply passage 671 for leading wash water to the rim-side water supply passage 340 . and a tank-side water discharge portion 672 for leading out washing water.

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

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

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

In the following, to clarify the positional relationship, the X-axis, Y-axis and Z-axis are defined to be orthogonal to each other, and the positive direction of the Z-axis is defined as the vertically upward direction.

The valve unit 600 comprises a first unit 601 and a second unit 602, as shown in FIGS. 2A-3B.

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

As shown in FIG. 3A , the water supply valve section 640 includes a pressure chamber 641 , a water supply valve 642 , an electromagnetic valve 643 and a housing 644 . The pressure chamber 641 has a water inlet 641 a communicating with the water inlet 610 and a water outlet 641 b communicating with the vacuum breaker 680 . The water inlet 641a opens horizontally, and the water outlet 641b opens vertically. The water supply valve 642 is provided inside the pressure chamber 641, and by closing or opening the water outlet 641b, switches between spouting and stopping cleansing water to the downstream side of the water outlet 641b.

The solenoid valve 643 is provided on the side of the pressure chamber 641 . When the electromagnetic valve 643 is opened, the pressure in the pressure chamber 641 is released, and the water pressure of the washing water pushes down the water supply valve 642 . As a result, the water outlet 641b is opened, and the wash water flows into the vacuum breaker section 680. As shown in FIG. On the other hand, when the solenoid 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 section 680 is stopped.

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

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

The housing 644 is formed by inserting the 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 (a rim side water outlet section 671 and a tank side water outlet section 672). .

As shown in FIG. 3B , the vacuum breaker section 680 includes a vacuum breaker 687 and a water receiving section 684 . Also, the vacuum breaker 687 includes a water passage 681 , an air inlet 682 and a valve body 683 .

The water passage 681 has a water inlet 685 on the upstream side (the water supply valve portion 640 side) and a water outlet port 686 on the downstream side (the switching valve portion 660 side). The water inlet 685 opens vertically, and the water outlet 686 opens horizontally. The atmosphere introduction port 682 is an opening that communicates the water passage 681 with the outside, is provided above the water inlet 685, and opens in the vertical direction.

The valve element 683 is provided inside the water passage 681 and moves up and down inside the water passage 681 according to the water pressure of the wash water. The valve element 683 rises due to water pressure to allow the water inlet 685 and the water outlet 686 to communicate with each other when the water is flowing, and lowers due to its own weight to allow the water inlet 685 and the air inlet 682 to communicate with each other when the water is not flowing.

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

The switching valve portion 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 disk-shaped opposing surface 661a, and an inlet 663 through which cleansing water flows and two outlets 664 and 665 are formed in the opposing surface 661a. The inflow port 663 and the two outflow ports 664 and 665 have, for example, a fan-like shape that spreads from the center of the opposing surface 661a toward the outer periphery, and are arranged circumferentially with respect to the opposing surface 661a. Both the inflow port 663 and the two outflow ports 664 and 665 open horizontally.

An inlet 663 of the switching valve section 660 is positioned at the same height as the water outlet 686 of the vacuum breaker section 680 and communicates with the water outlet 686 . Of the two outlets 664 and 665 , the outlet 664 communicates with the rim side water outlet 671 and the outlet 665 communicates with the tank side water outlet 672 .

The rim-side water outlet portion 671 is connected to the rim-side water supply channel 340 and leads out the washing water to the rim-side water supply channel 340 . Also, the tank-side water outlet 672 is connected to the tank-side water supply path 360 to lead out washing water to the tank-side water supply path 360 . The rim-side water outlet portion 671 and the tank-side water outlet portion 672 correspond to the switching valve portion when the direction in which the vacuum breaker portion 680 and the switching valve portion 660 are arranged (the direction perpendicular to the paper surface in FIG. 3A) is the front-rear direction of the switching valve portion 660. 660 (the direction perpendicular to the paper surface in FIG. 3B).

Here, an example in which two outflow ports 664 and 665 are formed in the fixed valve body 661 will be described, but the fixed valve body 661 may be formed with three or more outflow ports. In addition, the fixed valve body 661 constitutes a flow path from the water supply valve portion 640 to the vacuum breaker portion 680 . Such channels extend upward (see FIG. 3B), and the cleaning water rises through these channels and flows into the vacuum breaker section 680 .

The movable valve body 662 has a sector shape, for example, and is provided at a position in contact with the facing surface 661 a of the fixed valve body 661 . A shaft 666 rotatably supports the movable valve body 662 and a motor 667 rotates the shaft 666 . The motor 667 rotates the shaft 666, and the rotation of the shaft 666 causes the movable valve body 662 to rotate. change. As the motor 667, for example, a stepping motor can be used.

The switching valve unit 660 slides the movable valve body 662 to close one of the outflow ports 664 and 665 with the movable valve body 662, thereby diverting the cleansing water flowing in from the inflow port 663 to a rim discharge port. It is possible to switch between the spout 212 and the tank 800 . For example, when the outflow port 665 is blocked by the movable valve body 662 , the cleansing water flowing in from the inflow port 663 flows out to the rim spout 212 through the outflow port 664 . On the other hand, when the outflow port 664 is blocked by the movable valve body 662 , the wash water flowing in from the inflow port 663 flows out to the tank 800 through the outflow port 665 .

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

As shown in FIGS. 4A-4C, the valve unit 600 according to the embodiment can be separated into a first unit 601 and a second unit 602 . As a result, since the first unit 601 and the second unit 602 can be appropriately rearranged, for example, when it is desired to change the configuration of the vacuum breaker section 680, only the second unit is newly manufactured and the existing first unit 601 is used. It should be assembled. Thus, according to the valve unit 600 according to the embodiment, it is possible to provide the cleaning water supply device 1 with high versatility.

Moreover, by making the valve unit 600 dividable 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, in the flow path from the water inlet portion 610 to the water outlet portion 670 (the rim side water outlet portion 671 and the tank side water outlet portion 672), the first unit 601 forms a second The first flow path P1 (see FIG. 3A) is formed of a material having higher rigidity than the second flow path P2 (see FIG. 3B) formed in the second unit 602 among the above flow paths. In this way, by forming the first flow path P1, which is the flow path on the primary side, which requires relatively high strength, from a material with higher rigidity than the second flow path P2, which is the flow path on the secondary side, manufacturing Cost can be kept low.

The first flow path P1 is composed of the water inlet portion 610 and the upper housing 645 and the lower housing 646 of the water supply valve portion 640, and the second flow path P2 is composed of the switching valve portion 660 and the vacuum breaker portion 680. . The water inlet portion 610, the upper housing 645 and the lower housing 646, which constitute the first flow passage P1, are made of, for example, PPS (polyphenylene sulfide), and the switching valve portion 660 and the vacuum breaker portion 680 which constitute the second flow passage P2. is made 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 connection convex portion 650a that opens vertically on the downstream side of the water outlet 641b (see FIG. 3A). In addition, the fixed valve body 661 of the second unit 602 is upstream of the water inlet 685 (see FIG. 3B) of the vacuum breaker section 680, has a larger inner diameter than the connecting protrusion 650a, and has a cylindrical shape that opens in the vertical direction. 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. Also, this forms 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 . A seal member 650c such as an O-ring is interposed between the connection projection 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 gap from the connecting convex portion 650a. The first engaging portion 651 includes a first groove portion 651a extending along the vertical direction, a second groove portion 651b communicating with the first groove portion 651a and extending along the circumferential direction of the connection convex portion 650a, and a and a projecting portion 651c that narrows the width of the second groove portion 651b. In addition, the second engaging portion 653 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 that protrude radially outward from the connection recess 650b.

Then, as shown in FIG. 4B, after 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, the second unit 602 is twisted to 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. Further, by performing the above operation, the second protrusion 654 is fitted into the third groove 653a of the second engaging portion 653, and the second protrusion 654 and the second engaging portion 653 are engaged.

In this manner, the first engaging portion 651 and the first convex portion 652 are engaged, and the second engaging portion 653 and the second convex portion 654 are engaged. In contrast, even if an upward force is applied, it is possible to prevent the second unit 602 from coming off from 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. FIG. 5B is a plan view showing a state in which the second unit 602 is removed from the valve unit 600. FIG.

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, the plurality of units provided in the first unit 601 is provided at a position where a part of the upper screw hole 647 a of is hidden by the second unit 602 . In a conventional valve unit, the screw is inserted from below, that is, from the lower housing side, because the upper screw hole cannot be accessed from above because it cannot be seen from above. However, in this case, the entire valve unit must be removed from the flush toilet 100, leaving 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. 5B, the screws S can be inserted from above into all the upper screw holes 647a by removing the second unit 602 as shown in FIG. 5B. Therefore, it is possible to improve workability and maintainability as compared with the conventional art.

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

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

Further, as shown in FIG. 6B, a valve unit 600B according to the second modification is configured by assembling a second unit 602B to the first unit 601. As shown in FIG. The second unit 602B has a configuration in which the vacuum breaker section 680 is provided and the switching valve section 660 is not provided. Such a valve unit 600B is incorporated, for example, into a toilet body having a single spout.

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

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

In this way, by appropriately combining the first unit and the second unit, it is possible to cope with a wide variety of toilet bowl bodies while suppressing the manufacturing cost.

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

Switching valve unit 660 is configured such that both outlets 664 and 665 are in communication with inlet 663 when, for example, the state in which outlet 664 is opened is shifted to the state in which outlet 665 is opened, that is, the washing water is switched. flows out of both outlets 664, 665 (the state shown in FIG. 3A). In this state, the flow rate of cleansing water flowing through each of the outlets 664 and 665 is less than the flow rate of cleansing water flowing upstream of the switching valve portion 660 .

On the other hand, the vacuum breaker section 680 related to the washing water supply device 1 according to the embodiment is provided upstream of the switching valve section 660 . Therefore, the occurrence of malfunction of the valve body 683 due to a drop in water pressure is suppressed, so the amount of overflowing water can be reduced. As a result, the water receiving portion 684 can be made smaller than before, so the cleaning water supply apparatus 1 can be made smaller than before.

As shown in FIG. 3B , the casing part 668 is arranged to face the facing surface 661 a of the fixed valve body 661 with the movable valve body 662 interposed therebetween, and along with the fixed valve body 661 , the cleaning water flows from the inlet 663 to the outlets 664 and 665 . form an internal space that serves as a flow path for the

In the cleaning water supply apparatus 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, which are arranged downstream of the vacuum breaker portion 680, are arranged above the upper surface of the vacuum breaker portion 680. placed in a low position. Specifically, the switching valve portion 660 , the rim-side water supply passage 340 , the tank-side water supply passage 360 , and the like are arranged at positions lower than the upper surface of the water receiving portion 684 .

Here, it is stipulated that the mounting position of the vacuum breaker portion 680 must be at a position higher than the overflow surface of the toilet body 200 by a predetermined amount or more. Therefore, the vacuum breaker section 680 cannot be attached at a position lower than the regulation. Therefore, in the cleaning 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 , etc. are provided below the vacuum breaker portion 680 . As a result, the height dimension of the washing water supply device 1 can be reduced as much as possible, so that the washing water supply device 1 can be further miniaturized.

Further, as shown in FIG. 3A , in the switching valve portion 660 according to the embodiment, the outflow ports 664 and 665 are formed below the inflow port 663 .

Since residual water may remain downstream of the vacuum breaker section 680 , if the switching valve section 660 is provided downstream of the vacuum breaker section 680 , residual water may remain in the switching valve section 660 . Residual water accumulates in the space below the outflow ports 664 and 665 in the switching valve portion 660 .

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

In contrast, in the washing water supply apparatus 1 according to the embodiment, the outflow ports 664 and 665 are formed below the inflow port 663 as a countermeasure against residual water in the switching valve portion 660 . As a result, the space below the outflow ports 664 and 665 in the switching valve portion 660 becomes smaller than in the conventional switching valve portion in which the outflow port is formed above the inflow port. Therefore, compared to the conventional switching valve portion, the remaining water in the switching valve portion 660 can be reduced, and the occurrence of defective water flow and breakage due to residual water can be suppressed.

Furthermore, in the cleaning water supply device 1 according to the embodiment, as shown in FIG. 668a is brought closer to the fixed valve body 661 than the surface 668b facing the inflow port 663 is.

As a result, the volume of the space below the outflow ports 664 and 665, which is the space where residual water is generated, can be reduced, so the amount of residual water accumulated in this space can be reduced. Therefore, residual water in the switching valve portion 660 can be further reduced.

In addition, in the cleaning water supply apparatus 1 according to the embodiment, in order to discharge the residual water in the switching valve section 660 to the outside of the switching valve section 660, as shown in FIG. We decided to provide discharge paths 669, 669 for

The movable valve body 662 has discharge passages 669, 669 on the surface facing the casing portion 668 (see FIG. 3B). The discharge passages 669, 669 are, for example, grooves extending linearly from the peripheral edge portion of the movable valve body 662 facing outward in the rotational direction to the peripheral edge portion facing the rotational direction of the movable valve body 662. be. One of the two discharge channels 669 , 669 extends toward the outlet 664 and the other extends toward the outlet 665 .

As described above, residual water accumulates in the space below the outflow ports 664 and 665 in the switching valve portion 660 . The discharge passages 669, 669 extend to a space below the outflow ports 664, 665, and the washing water collected in such spaces flows through the discharge passages 669, 669 from the lower ends of the discharge passages 669, 669 by capillary action. After rising and moving to the upper end, it is discharged out of the switching valve portion 660 through the outflow ports 664 and 665 .

As described above, in the cleaning water supply apparatus 1 according to the embodiment, the remaining water in the switching valve portion 660 is guided to the outlets 664 and 665 by capillary action using the discharge paths 669 and 669, and is switched from the outlets 664 and 665. It was decided to discharge to the outside of the valve portion 660 . Therefore, residual water in the switching valve portion 660 can be further reduced.

The lower ends of the discharge paths 669, 669 are always at the lowest positions of the outlets 664, 665 within the movable range of the movable valve body 662 having both the outlet 665 closed and the outlet 664 closed. It is preferable to be installed in the following places. As a result, the wash water accumulated in the outflow ports 664 and 665 can be more reliably discharged to the outside of the switching valve portion 660 .

Here, an example in which the movable valve body 662 is provided with the two discharge paths 669 , 669 has been described, but the movable valve body 662 may be provided with at least one discharge path 669 . Further, here, an example in which straight discharge passages 669, 669 are provided in the movable valve body 662 has been described, but the discharge passages do not necessarily need to be straight. It may be formed in a zigzag shape.

Moreover, 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 located below the lowest position of the outflow ports 664 and 665 and the other end having a groove communicating with one of the outflow ports 664 and 665 as a discharge channel. good too. Also, it is possible to provide a discharge passage in both the movable valve body 662 and the fixed valve body 661 .

Also, here, the discharge passages 669, 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 textured, and the textured surface may be used as the discharge passage.

As described above, the cleaning water supply device 1 according to the embodiment includes the water inlet section 610 , the water supply valve section 640 , the vacuum breaker section 680 and the water outlet section 670 . Washing water is introduced into the water inlet portion 610 . The water supply valve section 640 includes a water supply valve 642 that is provided downstream of the water inlet section 610 and opens and closes the flow path. Vacuum breaker section 680 is provided downstream of water supply valve section 640 and includes a vacuum breaker 687 . The water discharge section 670 is provided downstream of the vacuum breaker section 680 and discharges washing water. Further, the washing water supply apparatus 1 according to the embodiment is configured to be divisible into a first unit 601 including a water inlet section 610 and a water supply valve section 640 and a second unit 602 including a vacuum breaker section 680 and a water outlet section 670. be.

Therefore, according to the flush water supply device 1 according to the embodiment, since the first unit and the second unit can be rearranged according to the functions required for the flush toilet, versatility can be improved.
The first unit is arranged below the second unit, and the water supply valve part 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 formed with a plurality of lower screw holes corresponding to the It is characterized by being provided at a position hidden by the second unit.
In order to reduce the footprint of the washing water supply device, the screw hole used for fastening the upper housing and the lower housing of the water supply valve must be hidden by a vacuum breaker or the like provided above the water supply valve. may not be obtained. For this reason, conventionally, the screws are inserted from below, that is, from 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 dividable into the first unit and the second unit, at least one of the plurality of upper screw holes is hidden by the second unit. Even if provided, all upper screw holes can be accessed from above by removing the second unit. For this reason, it is possible to improve workability and maintainability as compared with the conventional art.
In addition, the second unit may further include a switching valve section provided downstream of the water supply valve section to switch the outflow destination of the washing water.
The switching valve portion provided on the downstream side, that is, the secondary side of the water supply valve portion does not require high rigidity as compared with the water supply valve portion. Therefore, by including the switching valve section in the second unit, the cost can be reduced compared to the case where the switching valve section is included in the first unit.
In addition, the vacuum breaker section includes a water passage having a water inlet on an upstream side and a water outlet on a downstream side, an atmosphere introduction port communicating between the water passage and the outside, and is provided in the water passage. and a valve body for communicating the water inlet and the water outlet when the water is flowing and the water inlet and the air inlet when the water is not flowing by operating by the water pressure of the air inlet. a water receiving portion for receiving washing water, and the switching valve portion is provided downstream of the vacuum breaker portion.
When switching the outflow destination of cleansing water from one outflow destination to another outflow destination, the switching valve goes through a state in which cleansing water flows out to both outflow destinations. In this state in which the cleansing water flows out to both outflow destinations, the flow rate of the cleansing water flowing to each outflow destination is smaller than the flow rate of the cleansing water flowing upstream of the switching valve. Therefore, if a vacuum breaker is provided on the downstream side of the switching valve, the valve element of the vacuum breaker will not operate normally due to the drop in water pressure caused by the drop in flow rate, and flush water that should be supplied to the toilet bowl body will be introduced into the atmosphere. It may overflow from the mouth. For this reason, the vacuum breaker has conventionally been provided with a water receiving portion for receiving the cleaning water overflowing from the air inlet. On the other hand, on the upstream side of the switching valve, the flow rate does not decrease as described above. Therefore, in the cleaning water supply device according to one aspect of the embodiment, the vacuum breaker is provided upstream of the switching valve. As a result, it is possible to prevent malfunction of the valve body due to a decrease in water pressure caused by a decrease in flow rate. By suppressing the malfunction of the valve body, the amount of wash water overflowing from the air inlet is reduced, so the water receiver can be made smaller than before. As a result, the size of the washing water supply device can be reduced as compared with the conventional one.

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

1 cleaning water supply device 600 valve unit 610 water inlet 620 constant flow valve 640 water supply valve 660 switching valve 680 vacuum breaker 670 water outlet 671 rim side water outlet 672 tank side water outlet

Claims (5)

A second unit forming part of a flush water supply device that supplies flush water to a toilet body,
a connecting portion with a first unit including a water inlet portion into which washing water is introduced and a water supply valve portion provided downstream of the water inlet portion and including a water supply valve for opening and closing a flow path;
a vacuum breaker section including a vacuum breaker;
a water outlet provided on the downstream side of the vacuum breaker from which wash water is led out,
The connecting portion includes an engaging portion that engages the first unit and the second unit by rotating the first unit and the second unit relative to the first unit. ,
A central axis of relative rotation between the first unit and the second unit when the first unit and the second unit are engaged is perpendicular to the extending direction of the water inlet section. , a second unit of a washing water supply device removable from said first unit; 2. The engaging part according to claim 1, wherein the engaging part engages the first unit and the second unit by relatively rotating the first unit and the second unit at an angle of 180 degrees or less. 2nd unit of the washing water supply device. Among the flow paths from the water inlet section to the water outlet section, the first flow path formed in the first unit is formed in the second unit among the flow paths from the water inlet section to the water outlet section. 3. The second unit of the washing water supply device according to claim 1 or 2, which is formed of a material having a higher rigidity than the second flow path formed therein. The water supply valve portion has a cylindrical connection convex portion that opens in the vertical direction on the downstream side,
The second unit of the washing water supply device according to any one of claims 1 to 3, wherein the second unit is attached to the second unit via a seal member at the connection protrusion. A flush toilet comprising the second unit of the flush water supply device according to any one of claims 1 to 4.

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